This part is developed in accordance with the rules given in GB/T 1.1-2009.
This part replaces GB/T 3903.7-2005 Footwear - Ageing conditioning, and the following main technical changes have been made with respect to GB/T 3903.7-2005:
——The normative references are modified (see Clause 2, Clause 2 of Edition 2005);
——The terms and definitions are modified (see Clause 3, Clause 3 of Edition 2005);
——The test report is modified (see Clause 8, Clause 8 of Edition 2005);
——The word "heat ageing" is changed to "dry heat ageing" in the text; and the word "humidified ageing" is changed to "damp-heat ageing".
This part, by means of translation, is identical to ISO 20870: 2017 Footwear - Ageing conditioning.
The Chinese documents identical to the normative international documents given in this part are as follows:
——GB/T 22049-2019 Footwear - Standard atmospheres for conditioning and testing of footwear and components for footwear (ISO 18454: 2018, IDT);
——GB/T 22050-2008 Footwear - Sampling location, preparation and duration of conditioning of samples and test pieces (ISO 17709: 2004, IDT).
The following editorial changes have been made in this part:
——To be consistent with the existing standard series in China, the standard is renamed as Footwear - Test methods for whole shoe - Ageing conditioning.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This part was proposed by China National Light Industry Council.
This part is under the jurisdiction of SAC/TC 305 National Technical Committee on Footwear of Standardization Administration of China.
The previous edition replaced by this part is as follows:
——GB/T 3903.7-2005.
Footwear - Test methods for whole shoe - Ageing conditioning
1 Scope
This part of GB/T 3903 specifies test methods which are intended to imitate the effects of naturally occurring reactions. The physical properties of interest are measured before and after the application of the ageing conditioning. The effect of the ageing conditioning on any of the physical properties of the material may be determined.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 17709 Footwear - Sampling location, preparation and duration of conditioning of samples and test pieces
ISO 18454 Footwear - Standard atmospheres for conditioning and testing of footwear and components for footwear
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 17709 and ISO 18454 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
——ISO Online browsing platform: available at https: //www.iso.org/obp
——IEC Online browsing platform: http: //www.electropedia.org/
4 Test apparatus and materials
4.1 Dry heat ageing test
4.1.1 Oven, with forced circulation system, capable of maintaining the temperature within (70 ± 2)℃.
4.2 Damp heat ageing test
4.2.1 Ageing apparatus, of such a size that the total volume of test pieces does not exceed 10% of the free air space, and such that the test pieces are free to stretch, and exposed to the ageing atmosphere on all sides and not exposed to light.
4.2.2 Glass vessel, with a suitable plug for maintaining the test pieces at a relative humidity of 100%, and a water-bath or oven for heating the vessel, capable of maintaining the temperature at (70±2)℃.
5 Sampling and conditioning
The number, size and shape of the test pieces shall be determined according to the nature of the test, and sampling shall be done in accordance with ISO 17709 before the ageing test, with the dimensions defined in the particular test.
6 Test procedure
After conditioning, the physical properties shall be determined, and the test pieces shall be brought rapidly to the ageing condition. The duration of dry heat ageing and of damp heat ageing is (168±2) h.
At the end of the ageing treatment, condition for 24 h according to ISO 18454 before testing.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Test apparatus and materials
5 Sampling and conditioning
6 Test procedure
7 Expression of results
8 Test report
This part is developed in accordance with the rules given in GB/T 1.1-2009.
This part replaces GB/T 3903.7-2005 Footwear - Ageing conditioning, and the following main technical changes have been made with respect to GB/T 3903.7-2005:
——The normative references are modified (see Clause 2, Clause 2 of Edition 2005);
——The terms and definitions are modified (see Clause 3, Clause 3 of Edition 2005);
——The test report is modified (see Clause 8, Clause 8 of Edition 2005);
——The word "heat ageing" is changed to "dry heat ageing" in the text; and the word "humidified ageing" is changed to "damp-heat ageing".
This part, by means of translation, is identical to ISO 20870: 2017 Footwear - Ageing conditioning.
The Chinese documents identical to the normative international documents given in this part are as follows:
——GB/T 22049-2019 Footwear - Standard atmospheres for conditioning and testing of footwear and components for footwear (ISO 18454: 2018, IDT);
——GB/T 22050-2008 Footwear - Sampling location, preparation and duration of conditioning of samples and test pieces (ISO 17709: 2004, IDT).
The following editorial changes have been made in this part:
——To be consistent with the existing standard series in China, the standard is renamed as Footwear - Test methods for whole shoe - Ageing conditioning.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This part was proposed by China National Light Industry Council.
This part is under the jurisdiction of SAC/TC 305 National Technical Committee on Footwear of Standardization Administration of China.
The previous edition replaced by this part is as follows:
——GB/T 3903.7-2005.
Footwear - Test methods for whole shoe - Ageing conditioning
1 Scope
This part of GB/T 3903 specifies test methods which are intended to imitate the effects of naturally occurring reactions. The physical properties of interest are measured before and after the application of the ageing conditioning. The effect of the ageing conditioning on any of the physical properties of the material may be determined.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 17709 Footwear - Sampling location, preparation and duration of conditioning of samples and test pieces
ISO 18454 Footwear - Standard atmospheres for conditioning and testing of footwear and components for footwear
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 17709 and ISO 18454 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
——ISO Online browsing platform: available at https: //www.iso.org/obp
——IEC Online browsing platform: http: //www.electropedia.org/
4 Test apparatus and materials
4.1 Dry heat ageing test
4.1.1 Oven, with forced circulation system, capable of maintaining the temperature within (70 ± 2)℃.
4.2 Damp heat ageing test
4.2.1 Ageing apparatus, of such a size that the total volume of test pieces does not exceed 10% of the free air space, and such that the test pieces are free to stretch, and exposed to the ageing atmosphere on all sides and not exposed to light.
4.2.2 Glass vessel, with a suitable plug for maintaining the test pieces at a relative humidity of 100%, and a water-bath or oven for heating the vessel, capable of maintaining the temperature at (70±2)℃.
5 Sampling and conditioning
The number, size and shape of the test pieces shall be determined according to the nature of the test, and sampling shall be done in accordance with ISO 17709 before the ageing test, with the dimensions defined in the particular test.
6 Test procedure
After conditioning, the physical properties shall be determined, and the test pieces shall be brought rapidly to the ageing condition. The duration of dry heat ageing and of damp heat ageing is (168±2) h.
At the end of the ageing treatment, condition for 24 h according to ISO 18454 before testing.
Contents of GB/T 3903.7-2019
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Test apparatus and materials
5 Sampling and conditioning
6 Test procedure
7 Expression of results
8 Test report
