Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 8814-2004 Unplasticized Polyvinyl Chloride (PVC-U) Profiles for Doors and Windows.
Compared with GB/T 8814-2004, the main technical differences from this standard are as follows:
—— Add general body profiles and decorative profiles in terms and definitions and classification, classification and marking;
—— The wall thickness of the non-visible surface of Type B material should be no less than 2.0mm and should not be less than 2.2mm;
—— Cancel C-type material;
—— Increase drop hammer impact class III of main profile;
—— Increase density requirements;
—— Modify the Vicat softening temperature (VST) to not less than 75 °C to not less than 78 °C;
—— Increase tensile yield stress and tensile fracture strain requirements;
—— increase the requirement for short-term welding coefficient;
—— Increase the requirements for the heat transfer coefficient of the main section;
—— Increase requirements for hazardous substance limits;
—— Add relevant requirements and test methods for all-body profiles and decorative profiles;
——Replace the informative Appendix A of this document in GB/T 8814-2004 with “Comparison of EN 12608:2008 rule number” with “Profile color deviation”, and delete the appendix in GB/T 8814-2004 B and Appendix C.
This standard is proposed by China Light Industry Federation.
This standard is under the jurisdiction of the National Standardization Technical Committee for Plastic Products (SAC/TC 48).
The previous versions of the standards replaced by this standard are:
- GB/T 8814-1988, GB/T 8814-1998, GB/T 8814-2004
Unplasticized Polyvinyl Chloride(PVC-U) Profiles for the Doors and Windows
1 Scope
This standard specifies the material, classification, classification and marking of unplasticized polyvinyl chloride (PVC-U) profiles for doors and windows, requirements, test methods, inspection rules, signs, packaging, transportation and storage.
This standard applies to door and window profiles made of unplasticized polyvinyl chloride.
2 Normative References
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest version (including all amendments) applies to documents.
GB/T 250-2008
Textiles - Tests for colour fastness
GB/T 1033.1-2008 Plastics - Determination of Density of Non-cellular plastics - Part 1: Immersion Method, Liquid Pycnometer Method and Titration Method
GB/T 1040.2 Plastics - Determination of Tensile Properties - Part 2: Test conditions for Moulded and Extruded Plastics
GB/T 1043.1-2008 Plastics - Determination of Impact Properties of Simple Supported Beams - Part 1: Non-instrumented Impact Test
GB/T 1633-2000 Determination of Vicat Softening Temperature (VST) of Thermoplastics
GB/T 1766-2008 Paints and Varnishes Rating Methods for Coating Ageing
GB/T 2828.1-2012 Count Sampling Inspection Procedures Part 1: Batch Inspection Sampling Plans Retrieved by Acceptance Quality Limit (AQL)
GB/T 6739-2006 Paints and Varnishes Pencil Method for Determination of Film Hardness
GB/T 8484-2008 Classification and Testing Methods for Insulation Performance Of Doors and Windows Outside Buildings
GB/T 9286-1998 Paints and Varnishes
GB/T 9341-2008 Determination of Bending Properties of Plastics
GB/T 11186.2 Methods for Determining the Color Of Coating Film Part 2: Color Measurement
GB/T 11186.3 Methods for Measuring The Color of Coatings - Part 3: Color Difference Calculation
GB/T 16422.2-2014 Plastics - Laboratory Light Source Exposure Test Methods - Part 2: Xenon Arc Lamps
GB/T 33284 Interior Decorating Materials Unqualified Polyvinyl Chloride (PVC-U) Profiles for Doors and Windows
JG/T 176 Plastic Door and Window Profile Functional Structure Size
JG/T 451-2014 Unplasticized Polyvinyl Chloride Blends for Architectural Plastic Door and Window Profiles
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
profiles
extruded products with a specific cross-sectional shape
3.2
white profiles
integral material is uniform, and the color is within the profile of CIE 1976 (L*a*b*) color space with L* ≥ 82, -2.5 ≤ a* ≤ 5, -5 ≤ b* ≤ 15
3.3
homogenous profiles
integral material uniform theme
3.4
profiles laminated with foil
profiles that are decorated with a laminated diaphragm to change surface characteristics
3.5
co-extruded profiles
coextruded polymer materials decorate and change the profile of the surface
3.6
coating profiles
profiles that are decorated with paint and change surface characteristics
3.7
main profiles
boxes, fans (except for yarn fans), and subjects
3.8
auxiliary profiles
themes other than the main profile
3.9
sight surface
installed doors, windows, profiled surfaces that can be seen when the doors and windows are closed
3.10
decorative surface
after coating, co-extrusion, coating profiles surface
3.11
special decorative surface
the composition of decoration is non-single color, non-flat surface, etc
3.12
decorative profiles
profile with decorative surface
3.13
base profiles
profiles except for decorative surfaces
3.14
depth of a profiles
D
measure the maximum distance between two visible surfaces in the X-axis direction of the cross-section of the profile, see Figure 1
3.15
overall of a profiles
W
measure the maximum dimension of the structure in the cross-section of the profile along the Y-axis, see Figure 1.
Key:
D——thickness
W——width
——visible surface
——non-visible surface
Figure 1 Cross Section of a Profile
4 Substrate Material
Substrate materials for producing profiles shall comply with the requirements of Chapter 5 of JG/T451-2014, and the Vicat softening temperature (VST) of 5.8 shall be no less than 78°C.
Appropriate use of recycled materials produced by the company as substrate materials is allowed.
5 Classification, Grading and Marking
5.1 Classification
5.1.1 Colors and Processes
Profiles are divided into whole bodies and decorative profiles according to the color and process.
Whole body is divided into white body and non-white body profile;
Decorative profiles are divided into film, co-extrusion and coating profiles;
Profile color and process classification are shown in Table 1.
Table 1 Profile color and process classification
Code Number BT FM GJ TZ FBT
Category white full body lamination coextrusion painting non-white body
Key: Profiles with white decorative surfaces are classified by process.
5.1.2 Wall thickness of the main profile
The wall thickness of the main profile is shown in Figure 1, and the classification is shown in Table 2.
Table 2 Classification of Wall Thickness of Main Profiles unit: mm
Category Class A Class B
visible surface ≥2.8 ≥2.5
non-visible surface ≥2.5 ≥2.2
5.2 Grading
5.2.1 Drop hammer impact of main section
According to the main section of the drop hammer impact classification, see Table 3.
Table 3 Drop Hammer Impact Grading of Main Profiles
Level Level I Level II Level III
Drop weight/g 1 000
Drop height/mm 1 000 1 500
Temperature/°C —10 —20
Key: In specific climatic conditions (such as the coldest month average temperature is lower than -10 °C), to take full account of the brittle failure of the profile, it is recommended to select the dash drop impact level of the main profile of Grade II or III in the design.
According to the insulation grade of the main section, see Table 5.
Table 5 Classification of insulation properties of main sections
Level Level 1 Level 2 Level 3
Heat transfer coefficient Kf/[W/(m2·K)] ≤2.0 ≤1.6 ≤1.0
5.3 Main section mark and example
5.3.1 Marking
The main profile is marked as follows:
5.3.2 Example
Example 1: White body profile, wall thickness 2.5mm, drop height 1000mm, temperature -10°C, aging time 4000h, heat transfer coefficient 1.8W/(m2·K). Marked as BT-B-I-M-1.
Example 2: Coextrusion equipment, visual surface wall thickness 2.8mm, drop height 1500mm, temperature -20 °C, aging time 6000h, heat transfer coefficient 1.3W / (m2 · K). Marked as GJ-A-III-S-2
Example 3: One side co-extruded, one-side coated equipment, visible surface wall thickness 2.5mm, drop hammer height 1500mm, temperature -10°C, aging time 5000h, heat transfer coefficient 1.5W/(m2·K), marked GJ/FM-B-II-S-2.
6 Requirements
6.1 Appearance
The color of the observable side of the profile should be uniform, and the surface should be smooth and even, without obvious bumps and impurities. Themes should be clean and free of burrs.
Profiles allow invisible shrinkage marks caused by the process.
Decorative profiles should also comply with the provisions of Table 6.
Table 6 Appearance of Decorative Profile
Profile category Requirements
FM cover film should be completely covered, smooth, no bubbles, and other defects
GJ co-extrusion surface should not be exposed
TZ the coating surface should be free from defects such as air bubbles, pinholes, cracks, sagging, exposed bottom, impurities, and wrinkles
The appearance requirements of special decorative profiles can be negotiated between the customer and the manufacturer.
For further requirements on the color of the profile, see Appendix A.
6.2 Dimensions and Deviations
6.2.1 Shape and function structure size
Dimensional deviation should meet the requirements of Table 7.
Table 7 Dimensional Deviation
unit: mm
Size Deviation
Dimensions thickness D ±0.3
width W ±0.5
The functional structure size and deviation should meet the requirements of JG/T176.
6.2.2 Wall thickness of the main profile
The minimum wall thickness of the main profile shall comply with the requirements of Table 2. The wall thickness of GJ and TZ profiles includes the thickness of the decorative surface, but the FM profile does not include the thickness of the cover film and adhesive layer.
6.2.3 Thickness of the decorative surface
6.2.3.1 Lamination
The film thickness of FM profile should not be less than 0.160mm.
6.2.3.2 Coating surface dry film
The thickness of the dry film on the visible side of the TZ profile shall not be less than 0.025mm.
6.2.3.3 Coextruded layers
The coextruded layer thickness of GJ profile should not be less than 0.10mm.
6.3 Linear deviation
The linear deviation of the main profile with a length of 1m shall not exceed 1mm, and the linear deviation of the auxiliary profile with a length of 1m shall not exceed 3mm.
6.4 The mass of the main profile
The mass of the length of the main profile per meter should not be less than 95% of the nominal mass.
6.5 Dimensional change rate after heating
The rate of change after heating of the two opposite largest visual surfaces of the main profile shall not exceed 2.0%; the difference in the dimensional change after heating of the two visible surfaces of each sample shall not be greater than 0.4%.
The dimensional change after heating of the auxiliary profile should not exceed 3.0%.
6.6 Status after Heating
Profile surface should be free of bubbles, cracks, pits, decorative profiles should also comply with the provisions of Table 8.
Table 8 After Heating at 150°C
Profile category Requirements
FM There should be no separation between the membrane layers and between the membrane layer and the substrate. However, if bubbles appear, re-sampling should be performed at 120 °C for re-examination. The result should be no bubbles.
GJ No separation between the coextruded layer and the substrate
TZ The coating layer should not be peeled
6.7 Drop Hammer Impact
6.7.1 Drop impact of main section
The visual surface of the impacted body profile and the non-decorative viewing surface of the decorative profile shall have no more than one sample with the visual surface broken.
6.7.2 Drop impact on the decorative surface
The decorative visible surface of the decorative materials is impacted, and whether or not the decorative surface is cracked, separation between the decorative layer and the substrate should not occur.
6.8 Density
The density of the profile substrate should not exceed 1530 kg/m3.
6.9 Vicat softening temperature
The Vicat softening temperature (VST) of the profile substrate should not be less than 78°C.
6.10 Tensile Yield Stress and Tensile Fracture Strain
The tensile yield force of the profile base material is not less than 37 MPa, and the tensile fracture strain should not be less than 100%.
6.11 Flexural Modulus
The bending elastic modulus of the profile substrate should not be less than 2200 MPa.
6.12 Peel strength of coating layer and base material of FM profile
The peel strength of the coating layer and the substrate should not be less than 2.5N/mm.
6.13 Hardness of TZ coating layer and adhesion to the substrate
The pencil hardness of the coating should not be less than Class H.
The adhesion between the coating layer and the substrate should meet the requirements of the cross-cutting method.
6.14 GJ profile resistant to environmental stress cracking
There should be no crack on the co-extruded surface and no delamination or flaking of the coextruded layer and the substrate.
6.15 Aging
6.15.1 Color Change
Test is conducted according to the aging time required in Table 4:
The white decorative surface and white non-decorative surface of BT profiles and decorative profiles undergo a color measurement at intervals of 1000 h until the aging time required in Table 4 is reached. The color change of the sample before and after the visible surface aging within each time period is ΔE* should not exceed 5, and △b* should not be greater than 3;
The non-white decorative surface of FBT profiles and decorative profiles shall have a color change ΔE* of not less than 5 before and after the visible surface aging;
For the decorative surface of special decorative profiles, the color change of the visible surface of the sample before and after aging shall be not less than Grade 3 according to the gray sample card fastness grade specified in GB/T 250-2008.
6.15.2 Appearance Changes
The irradiated surface of the specimen after aging should not appear peeling, spots, peeling, cracks, etc. The appearance of decorative profiles and FBT profiles should also comply with the provisions of Table 9.
Table 9 Appearance of decorative profiles and FBT profiles after aging
Profile category Requirements
FM There should be no delamination, bulges, bubbles, etc. between the film and the substrate.
GJ No separation between the coextruded layer and the substrate
TZ No peeling or blistering between coating and substrate
After the aging, the retention rate of the simply supported beam (double notch) impact strength should not be less than 70%, and the decoration layer and the substrate of the decorative profile should not be separated.
6.15.4 Peel strength of coating layer and base material of FM profile
After the aging, the peel strength between the coating layer and the substrate should not be less than 2.0 N/mm.
6.15.5 Pulverization of TZ Extrusion Coating and Adhesion to Substrate
The level of powdering on the surface of the painting layer after aging should not be greater than 2.
After the aging, the adhesion between the coating layer and the substrate should meet the requirements of the zero-crossing method.
6.16 Weldability of Main Profiles
6.16.1 Compressive bending stress of fillet angle
The average bending bending stress of the welding angle should not be less than 35MPa, and the minimum bending bending stress should not be less than 30MPa.
6.16.2 Short-term welding coefficient
The non-decorative surface of the short-term welding coefficient should not be less than 0.8, and the decorative surface should not be less than 0.7.
6.17 heat transfer coefficient of the main section
The heat transfer coefficient of the main profile should meet the requirements of Table 5.
6.18 Limits of harmful substances
The limits of harmful substances in profiles shall meet the requirements of GB/T 33284.
7 Test methods
7.1 Conditioning and Test Environment
The condition was adjusted under the condition of temperature (23±2)°C and relative degree of (50±10)% and tested under the conditions. Samples used for appearance, size and deviation tests, adjustment time is not less than 1 h, and adjustment time for other test items is not less than 24 h.
7.2 Appearance
Visual observation was performed under natural light or an equivalent artificial light source, visually measuring a distance of 0.5 m.
7.3 Dimensions and Deviations
7.3.1 Shape, Functional Structure Size and Wall Thickness
Measured with a vernier caliper with a division value of not less than 0.05 mm, three measurements are made for the shape, functional structure size and wall thickness, and the wall thickness is taken as the minimum value. When the wall thickness is measured, the functional structure size area should be avoided and it should be carried out at a distance of 1 mm from the joint of different areas. The measurement site is shown in Figure 2.
The wall thickness of the FM profile shall be deducted from the thickness of the cover film and the adhesive layer. For the method, see 7.3.2.
Unit: mm
Figure 2 Wall Thickness Measurement
7.3.2 Thickness of the decorative surface
The thicknesses of the coating, co-extrusion and coating layers were measured with a reading microscope with an index of not less than 0.001 mm. A sample was taken from each of the three profiles. Three points were measured for each sample and the average was calculated. The minimum value of the three samples was taken as the result.
7.4 Linear Deviation
A sample of length (1000﹢ )mm was taken from each of the three profiles. Place the sample concave side down on a standard platform over three levels. Measure the maximum clearance between the profile and the platform using a feeler gauge with a division value of not less than 0.1 mm, and then measure the surface perpendicular to the first measurement and take the maximum of the three samples.
7.5 Quality of Main Profiles
From each of the three profiles, a section of 200 mm to 300 mm in length shall be taken. The end face of the specimen shall be perpendicular to the longitudinal axis of the profile. The mass of the sample is weighed with a balance of not less than 1 g. The length of the sample is measured with a gage with an index value of not less than 0.5 mm. Then the mass of the length of the profile is calculated and the arithmetic average of the three samples is taken.
7.6 Size change rate after heating
7.6.1 Sample Preparation
A sample of length (250 ± 5) mm was cut from each of the three profiles. Two vertical and intersecting measurement lines with a spacing of 200 mm were made on the visible side of the sample. A pair of markings are made on the two main faces of the main profile and the auxiliary profiles are marked on only one side.
7.6.2 Test Equipment
Electric blast box, the temperature accuracy is not less than 1 °C.
7.6.3 Test Procedure
Measure the distance L0 of the measurement line between the two reticle lines with a gage with an index value not less than 0.05 mm to the nearest 0.1 mm. Place the non-visible surface on a glass plate sprinkled with talcum powder in an electric blast box at (100±2)°C for a period of minutes, then remove the glass plate, cool to room temperature, and measure the measurement line between the two reticle lines. Distance L1, accurate to 0.1mm.
7.6.4 Results and Representations
The dimensional change rate after heating is calculated according to formula (1):
(1)
R - dimensional change rate after heating, %;
L0 - the distance between the two marking lines before heating, in millimeters (mm);
L1—The distance of the measurement line between the two marking lines after heating, in millimeters (mm).
For the main profile, calculate the heated dimensional change rates R1 and R2 of the two relative visible surfaces, take the average of three samples, and calculate the dimensional change rate of the two heated surfaces of each sample after heating. △R, take the maximum of the three samples.
7.7 After heating
7.7.1 Sample Preparation
A sample of length (200±10) mm was cut from each of the three profiles.
7.7.2 Test Equipment
Electric blast box, the temperature accuracy is not less than 1 °C.
7.7.3 Test Procedure
The sample was placed horizontally on a glass plate sprinkled with talc in an electric blast box at (150 ± 2) °C for a time of min, then removed together with a glass plate and cooled to room temperature. Observe whether it complies with 6.6.
If air bubbles appear on the decorative surface of the FM profile, it should be resampled and the same test performed at (120 ± 2) °C.
7.8 Drop Hammer Impact
7.8.1 Drop hammer impact on main section
7.8.1.1 Sample preparation
A total of 10 specimens with a length of (300 ± 5) mm were sampled from the three profiles.
7.8.1.2 Test Equipment
Drop weight impact tester: drop weight mass (1000 ± 5) g, hammer radius of curvature (25 ± 0.5) mm.
7.8.1.3 Test conditions
Put the sample in °C or °C for 1 hour and take it out. Perform the impact test at the temperature (23±2) °C. The single sample should be completed in 10s.
7.8.1.4 Test Procedure
Place the sample to be impacted upwards on the support frame (see Figure 3), impact the center of the sample between the two support blocks, each sample impacted once, the drop hammer height 1 is in mm, grade II and III The rating is mm and meets the following requirements:
a) The whole body profile should be exposed to the visible surface exposed to the outside, and when the outer visible surface cannot be confirmed, the two visible surfaces each impact 5 samples. If one of the visible surfaces cannot be subjected to an impact test, only the other A visual surface for impact testing.
Decorative profiles should impact non-decorative viewing surfaces.
b) For asymmetric structural profiles, to prevent tilting of the profile during impact, auxiliary supports shall be provided before impact.
c) For the visible surface of the multi-cavity structure profile, the cavity surface that crosses the center line of the visible surface should be selected. If the cavity is distributed on both sides of the center line of the visible surface, the larger chamber surface near the two chambers near the centerline shall be selected.
Foreword i 1 Scope 2 Normative References 3 Terms and Definitions 4 Substrate Material 5 Classification, Grading and Marking 6 Requirements 7 Test methods 8 Inspection Rules 9 Signs 10 Packaging, Transport and Storage
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 8814-2004 Unplasticized Polyvinyl Chloride (PVC-U) Profiles for Doors and Windows.
Compared with GB/T 8814-2004, the main technical differences from this standard are as follows:
—— Add general body profiles and decorative profiles in terms and definitions and classification, classification and marking;
—— The wall thickness of the non-visible surface of Type B material should be no less than 2.0mm and should not be less than 2.2mm;
—— Cancel C-type material;
—— Increase drop hammer impact class III of main profile;
—— Increase density requirements;
—— Modify the Vicat softening temperature (VST) to not less than 75 °C to not less than 78 °C;
—— Increase tensile yield stress and tensile fracture strain requirements;
—— increase the requirement for short-term welding coefficient;
—— Increase the requirements for the heat transfer coefficient of the main section;
—— Increase requirements for hazardous substance limits;
—— Add relevant requirements and test methods for all-body profiles and decorative profiles;
——Replace the informative Appendix A of this document in GB/T 8814-2004 with “Comparison of EN 12608:2008 rule number” with “Profile color deviation”, and delete the appendix in GB/T 8814-2004 B and Appendix C.
This standard is proposed by China Light Industry Federation.
This standard is under the jurisdiction of the National Standardization Technical Committee for Plastic Products (SAC/TC 48).
The previous versions of the standards replaced by this standard are:
- GB/T 8814-1988, GB/T 8814-1998, GB/T 8814-2004
Unplasticized Polyvinyl Chloride(PVC-U) Profiles for the Doors and Windows
1 Scope
This standard specifies the material, classification, classification and marking of unplasticized polyvinyl chloride (PVC-U) profiles for doors and windows, requirements, test methods, inspection rules, signs, packaging, transportation and storage.
This standard applies to door and window profiles made of unplasticized polyvinyl chloride.
2 Normative References
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest version (including all amendments) applies to documents.
GB/T 250-2008
Textiles - Tests for colour fastness
GB/T 1033.1-2008 Plastics - Determination of Density of Non-cellular plastics - Part 1: Immersion Method, Liquid Pycnometer Method and Titration Method
GB/T 1040.2 Plastics - Determination of Tensile Properties - Part 2: Test conditions for Moulded and Extruded Plastics
GB/T 1043.1-2008 Plastics - Determination of Impact Properties of Simple Supported Beams - Part 1: Non-instrumented Impact Test
GB/T 1633-2000 Determination of Vicat Softening Temperature (VST) of Thermoplastics
GB/T 1766-2008 Paints and Varnishes Rating Methods for Coating Ageing
GB/T 2828.1-2012 Count Sampling Inspection Procedures Part 1: Batch Inspection Sampling Plans Retrieved by Acceptance Quality Limit (AQL)
GB/T 6739-2006 Paints and Varnishes Pencil Method for Determination of Film Hardness
GB/T 7122-1996 Determination of High-Strength Adhesive Peel Strength Floating Roller Method
GB/T 8484-2008 Classification and Testing Methods for Insulation Performance Of Doors and Windows Outside Buildings
GB/T 9286-1998 Paints and Varnishes
GB/T 9341-2008 Determination of Bending Properties of Plastics
GB/T 11186.2 Methods for Determining the Color Of Coating Film Part 2: Color Measurement
GB/T 11186.3 Methods for Measuring The Color of Coatings - Part 3: Color Difference Calculation
GB/T 16422.2-2014 Plastics - Laboratory Light Source Exposure Test Methods - Part 2: Xenon Arc Lamps
GB/T 33284 Interior Decorating Materials Unqualified Polyvinyl Chloride (PVC-U) Profiles for Doors and Windows
JG/T 176 Plastic Door and Window Profile Functional Structure Size
JG/T 451-2014 Unplasticized Polyvinyl Chloride Blends for Architectural Plastic Door and Window Profiles
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
profiles
extruded products with a specific cross-sectional shape
3.2
white profiles
integral material is uniform, and the color is within the profile of CIE 1976 (L*a*b*) color space with L* ≥ 82, -2.5 ≤ a* ≤ 5, -5 ≤ b* ≤ 15
3.3
homogenous profiles
integral material uniform theme
3.4
profiles laminated with foil
profiles that are decorated with a laminated diaphragm to change surface characteristics
3.5
co-extruded profiles
coextruded polymer materials decorate and change the profile of the surface
3.6
coating profiles
profiles that are decorated with paint and change surface characteristics
3.7
main profiles
boxes, fans (except for yarn fans), and subjects
3.8
auxiliary profiles
themes other than the main profile
3.9
sight surface
installed doors, windows, profiled surfaces that can be seen when the doors and windows are closed
3.10
decorative surface
after coating, co-extrusion, coating profiles surface
3.11
special decorative surface
the composition of decoration is non-single color, non-flat surface, etc
3.12
decorative profiles
profile with decorative surface
3.13
base profiles
profiles except for decorative surfaces
3.14
depth of a profiles
D
measure the maximum distance between two visible surfaces in the X-axis direction of the cross-section of the profile, see Figure 1
3.15
overall of a profiles
W
measure the maximum dimension of the structure in the cross-section of the profile along the Y-axis, see Figure 1.
Key:
D——thickness
W——width
——visible surface
——non-visible surface
Figure 1 Cross Section of a Profile
4 Substrate Material
Substrate materials for producing profiles shall comply with the requirements of Chapter 5 of JG/T451-2014, and the Vicat softening temperature (VST) of 5.8 shall be no less than 78°C.
Appropriate use of recycled materials produced by the company as substrate materials is allowed.
5 Classification, Grading and Marking
5.1 Classification
5.1.1 Colors and Processes
Profiles are divided into whole bodies and decorative profiles according to the color and process.
Whole body is divided into white body and non-white body profile;
Decorative profiles are divided into film, co-extrusion and coating profiles;
Profile color and process classification are shown in Table 1.
Table 1 Profile color and process classification
Code Number BT FM GJ TZ FBT
Category white full body lamination coextrusion painting non-white body
Key: Profiles with white decorative surfaces are classified by process.
5.1.2 Wall thickness of the main profile
The wall thickness of the main profile is shown in Figure 1, and the classification is shown in Table 2.
Table 2 Classification of Wall Thickness of Main Profiles unit: mm
Category Class A Class B
visible surface ≥2.8 ≥2.5
non-visible surface ≥2.5 ≥2.2
5.2 Grading
5.2.1 Drop hammer impact of main section
According to the main section of the drop hammer impact classification, see Table 3.
Table 3 Drop Hammer Impact Grading of Main Profiles
Level Level I Level II Level III
Drop weight/g 1 000
Drop height/mm 1 000 1 500
Temperature/°C —10 —20
Key: In specific climatic conditions (such as the coldest month average temperature is lower than -10 °C), to take full account of the brittle failure of the profile, it is recommended to select the dash drop impact level of the main profile of Grade II or III in the design.
5.2.2 Aging Time
According to the aging time, see Table 4.
Table 4 Classification of Aging Time unit: hour
Level Level M(for inner door, window) Level S(for outer door, window)
Aging time 4 000 6 000
5.2.3 Insulation properties of the main section
According to the insulation grade of the main section, see Table 5.
Table 5 Classification of insulation properties of main sections
Level Level 1 Level 2 Level 3
Heat transfer coefficient Kf/[W/(m2·K)] ≤2.0 ≤1.6 ≤1.0
5.3 Main section mark and example
5.3.1 Marking
The main profile is marked as follows:
5.3.2 Example
Example 1: White body profile, wall thickness 2.5mm, drop height 1000mm, temperature -10°C, aging time 4000h, heat transfer coefficient 1.8W/(m2·K). Marked as BT-B-I-M-1.
Example 2: Coextrusion equipment, visual surface wall thickness 2.8mm, drop height 1500mm, temperature -20 °C, aging time 6000h, heat transfer coefficient 1.3W / (m2 · K). Marked as GJ-A-III-S-2
Example 3: One side co-extruded, one-side coated equipment, visible surface wall thickness 2.5mm, drop hammer height 1500mm, temperature -10°C, aging time 5000h, heat transfer coefficient 1.5W/(m2·K), marked GJ/FM-B-II-S-2.
6 Requirements
6.1 Appearance
The color of the observable side of the profile should be uniform, and the surface should be smooth and even, without obvious bumps and impurities. Themes should be clean and free of burrs.
Profiles allow invisible shrinkage marks caused by the process.
Decorative profiles should also comply with the provisions of Table 6.
Table 6 Appearance of Decorative Profile
Profile category Requirements
FM cover film should be completely covered, smooth, no bubbles, and other defects
GJ co-extrusion surface should not be exposed
TZ the coating surface should be free from defects such as air bubbles, pinholes, cracks, sagging, exposed bottom, impurities, and wrinkles
The appearance requirements of special decorative profiles can be negotiated between the customer and the manufacturer.
For further requirements on the color of the profile, see Appendix A.
6.2 Dimensions and Deviations
6.2.1 Shape and function structure size
Dimensional deviation should meet the requirements of Table 7.
Table 7 Dimensional Deviation
unit: mm
Size Deviation
Dimensions thickness D ±0.3
width W ±0.5
The functional structure size and deviation should meet the requirements of JG/T176.
6.2.2 Wall thickness of the main profile
The minimum wall thickness of the main profile shall comply with the requirements of Table 2. The wall thickness of GJ and TZ profiles includes the thickness of the decorative surface, but the FM profile does not include the thickness of the cover film and adhesive layer.
6.2.3 Thickness of the decorative surface
6.2.3.1 Lamination
The film thickness of FM profile should not be less than 0.160mm.
6.2.3.2 Coating surface dry film
The thickness of the dry film on the visible side of the TZ profile shall not be less than 0.025mm.
6.2.3.3 Coextruded layers
The coextruded layer thickness of GJ profile should not be less than 0.10mm.
6.3 Linear deviation
The linear deviation of the main profile with a length of 1m shall not exceed 1mm, and the linear deviation of the auxiliary profile with a length of 1m shall not exceed 3mm.
6.4 The mass of the main profile
The mass of the length of the main profile per meter should not be less than 95% of the nominal mass.
6.5 Dimensional change rate after heating
The rate of change after heating of the two opposite largest visual surfaces of the main profile shall not exceed 2.0%; the difference in the dimensional change after heating of the two visible surfaces of each sample shall not be greater than 0.4%.
The dimensional change after heating of the auxiliary profile should not exceed 3.0%.
6.6 Status after Heating
Profile surface should be free of bubbles, cracks, pits, decorative profiles should also comply with the provisions of Table 8.
Table 8 After Heating at 150°C
Profile category Requirements
FM There should be no separation between the membrane layers and between the membrane layer and the substrate. However, if bubbles appear, re-sampling should be performed at 120 °C for re-examination. The result should be no bubbles.
GJ No separation between the coextruded layer and the substrate
TZ The coating layer should not be peeled
6.7 Drop Hammer Impact
6.7.1 Drop impact of main section
The visual surface of the impacted body profile and the non-decorative viewing surface of the decorative profile shall have no more than one sample with the visual surface broken.
6.7.2 Drop impact on the decorative surface
The decorative visible surface of the decorative materials is impacted, and whether or not the decorative surface is cracked, separation between the decorative layer and the substrate should not occur.
6.8 Density
The density of the profile substrate should not exceed 1530 kg/m3.
6.9 Vicat softening temperature
The Vicat softening temperature (VST) of the profile substrate should not be less than 78°C.
6.10 Tensile Yield Stress and Tensile Fracture Strain
The tensile yield force of the profile base material is not less than 37 MPa, and the tensile fracture strain should not be less than 100%.
6.11 Flexural Modulus
The bending elastic modulus of the profile substrate should not be less than 2200 MPa.
6.12 Peel strength of coating layer and base material of FM profile
The peel strength of the coating layer and the substrate should not be less than 2.5N/mm.
6.13 Hardness of TZ coating layer and adhesion to the substrate
The pencil hardness of the coating should not be less than Class H.
The adhesion between the coating layer and the substrate should meet the requirements of the cross-cutting method.
6.14 GJ profile resistant to environmental stress cracking
There should be no crack on the co-extruded surface and no delamination or flaking of the coextruded layer and the substrate.
6.15 Aging
6.15.1 Color Change
Test is conducted according to the aging time required in Table 4:
The white decorative surface and white non-decorative surface of BT profiles and decorative profiles undergo a color measurement at intervals of 1000 h until the aging time required in Table 4 is reached. The color change of the sample before and after the visible surface aging within each time period is ΔE* should not exceed 5, and △b* should not be greater than 3;
The non-white decorative surface of FBT profiles and decorative profiles shall have a color change ΔE* of not less than 5 before and after the visible surface aging;
For the decorative surface of special decorative profiles, the color change of the visible surface of the sample before and after aging shall be not less than Grade 3 according to the gray sample card fastness grade specified in GB/T 250-2008.
6.15.2 Appearance Changes
The irradiated surface of the specimen after aging should not appear peeling, spots, peeling, cracks, etc. The appearance of decorative profiles and FBT profiles should also comply with the provisions of Table 9.
Table 9 Appearance of decorative profiles and FBT profiles after aging
Profile category Requirements
FM There should be no delamination, bulges, bubbles, etc. between the film and the substrate.
GJ No separation between the coextruded layer and the substrate
TZ No peeling or blistering between coating and substrate
FBT No bubbles or pits should appear
6.15.3 Simple Beam (Double Gap) Impact Strength Retention
After the aging, the retention rate of the simply supported beam (double notch) impact strength should not be less than 70%, and the decoration layer and the substrate of the decorative profile should not be separated.
6.15.4 Peel strength of coating layer and base material of FM profile
After the aging, the peel strength between the coating layer and the substrate should not be less than 2.0 N/mm.
6.15.5 Pulverization of TZ Extrusion Coating and Adhesion to Substrate
The level of powdering on the surface of the painting layer after aging should not be greater than 2.
After the aging, the adhesion between the coating layer and the substrate should meet the requirements of the zero-crossing method.
6.16 Weldability of Main Profiles
6.16.1 Compressive bending stress of fillet angle
The average bending bending stress of the welding angle should not be less than 35MPa, and the minimum bending bending stress should not be less than 30MPa.
6.16.2 Short-term welding coefficient
The non-decorative surface of the short-term welding coefficient should not be less than 0.8, and the decorative surface should not be less than 0.7.
6.17 heat transfer coefficient of the main section
The heat transfer coefficient of the main profile should meet the requirements of Table 5.
6.18 Limits of harmful substances
The limits of harmful substances in profiles shall meet the requirements of GB/T 33284.
7 Test methods
7.1 Conditioning and Test Environment
The condition was adjusted under the condition of temperature (23±2)°C and relative degree of (50±10)% and tested under the conditions. Samples used for appearance, size and deviation tests, adjustment time is not less than 1 h, and adjustment time for other test items is not less than 24 h.
7.2 Appearance
Visual observation was performed under natural light or an equivalent artificial light source, visually measuring a distance of 0.5 m.
7.3 Dimensions and Deviations
7.3.1 Shape, Functional Structure Size and Wall Thickness
Measured with a vernier caliper with a division value of not less than 0.05 mm, three measurements are made for the shape, functional structure size and wall thickness, and the wall thickness is taken as the minimum value. When the wall thickness is measured, the functional structure size area should be avoided and it should be carried out at a distance of 1 mm from the joint of different areas. The measurement site is shown in Figure 2.
The wall thickness of the FM profile shall be deducted from the thickness of the cover film and the adhesive layer. For the method, see 7.3.2.
Unit: mm
Figure 2 Wall Thickness Measurement
7.3.2 Thickness of the decorative surface
The thicknesses of the coating, co-extrusion and coating layers were measured with a reading microscope with an index of not less than 0.001 mm. A sample was taken from each of the three profiles. Three points were measured for each sample and the average was calculated. The minimum value of the three samples was taken as the result.
7.4 Linear Deviation
A sample of length (1000﹢ )mm was taken from each of the three profiles. Place the sample concave side down on a standard platform over three levels. Measure the maximum clearance between the profile and the platform using a feeler gauge with a division value of not less than 0.1 mm, and then measure the surface perpendicular to the first measurement and take the maximum of the three samples.
7.5 Quality of Main Profiles
From each of the three profiles, a section of 200 mm to 300 mm in length shall be taken. The end face of the specimen shall be perpendicular to the longitudinal axis of the profile. The mass of the sample is weighed with a balance of not less than 1 g. The length of the sample is measured with a gage with an index value of not less than 0.5 mm. Then the mass of the length of the profile is calculated and the arithmetic average of the three samples is taken.
7.6 Size change rate after heating
7.6.1 Sample Preparation
A sample of length (250 ± 5) mm was cut from each of the three profiles. Two vertical and intersecting measurement lines with a spacing of 200 mm were made on the visible side of the sample. A pair of markings are made on the two main faces of the main profile and the auxiliary profiles are marked on only one side.
7.6.2 Test Equipment
Electric blast box, the temperature accuracy is not less than 1 °C.
7.6.3 Test Procedure
Measure the distance L0 of the measurement line between the two reticle lines with a gage with an index value not less than 0.05 mm to the nearest 0.1 mm. Place the non-visible surface on a glass plate sprinkled with talcum powder in an electric blast box at (100±2)°C for a period of minutes, then remove the glass plate, cool to room temperature, and measure the measurement line between the two reticle lines. Distance L1, accurate to 0.1mm.
7.6.4 Results and Representations
The dimensional change rate after heating is calculated according to formula (1):
(1)
R - dimensional change rate after heating, %;
L0 - the distance between the two marking lines before heating, in millimeters (mm);
L1—The distance of the measurement line between the two marking lines after heating, in millimeters (mm).
For the main profile, calculate the heated dimensional change rates R1 and R2 of the two relative visible surfaces, take the average of three samples, and calculate the dimensional change rate of the two heated surfaces of each sample after heating. △R, take the maximum of the three samples.
7.7 After heating
7.7.1 Sample Preparation
A sample of length (200±10) mm was cut from each of the three profiles.
7.7.2 Test Equipment
Electric blast box, the temperature accuracy is not less than 1 °C.
7.7.3 Test Procedure
The sample was placed horizontally on a glass plate sprinkled with talc in an electric blast box at (150 ± 2) °C for a time of min, then removed together with a glass plate and cooled to room temperature. Observe whether it complies with 6.6.
If air bubbles appear on the decorative surface of the FM profile, it should be resampled and the same test performed at (120 ± 2) °C.
7.8 Drop Hammer Impact
7.8.1 Drop hammer impact on main section
7.8.1.1 Sample preparation
A total of 10 specimens with a length of (300 ± 5) mm were sampled from the three profiles.
7.8.1.2 Test Equipment
Drop weight impact tester: drop weight mass (1000 ± 5) g, hammer radius of curvature (25 ± 0.5) mm.
7.8.1.3 Test conditions
Put the sample in °C or °C for 1 hour and take it out. Perform the impact test at the temperature (23±2) °C. The single sample should be completed in 10s.
7.8.1.4 Test Procedure
Place the sample to be impacted upwards on the support frame (see Figure 3), impact the center of the sample between the two support blocks, each sample impacted once, the drop hammer height 1 is in mm, grade II and III The rating is mm and meets the following requirements:
a) The whole body profile should be exposed to the visible surface exposed to the outside, and when the outer visible surface cannot be confirmed, the two visible surfaces each impact 5 samples. If one of the visible surfaces cannot be subjected to an impact test, only the other A visual surface for impact testing.
Decorative profiles should impact non-decorative viewing surfaces.
b) For asymmetric structural profiles, to prevent tilting of the profile during impact, auxiliary supports shall be provided before impact.
c) For the visible surface of the multi-cavity structure profile, the cavity surface that crosses the center line of the visible surface should be selected. If the cavity is distributed on both sides of the center line of the visible surface, the larger chamber surface near the two chambers near the centerline shall be selected.
Contents of GB/T 8814-2017
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Substrate Material
5 Classification, Grading and Marking
6 Requirements
7 Test methods
8 Inspection Rules
9 Signs
10 Packaging, Transport and Storage
