Plastics - Determination of Tensile Properties of Films
This standard is formulated by reference to ISO 1184-1983 Plastics - Determination of Tensile Properties of Films.
1 Subject Content and Application Scope
This standard specifies the test method for tensile property of plastic film and sheet material.
This standard is applicable to plastic film and sheet material with thickness less than 1mm while not applicable to strengthened film, micro-porous sheet material and membrane.
2 Normative References
GB 2918 Plastics – Standard Atmospheres for Conditioning and Testing
GB 6672 Plastics Film and Sheeting - Determination of Thickness by Mechanical Scanning
3 Test Equipment
3.1 Any test machine that may be used for tensile test and be able to meet 3.2, 3.3 and 3.4 may be used.
3.2 The test machine shall be equipped with proper clamp which shall not lead to breakage of specimen at clamp. During applying any load, the clamps on test machine shall be able to be aligned in a line immediately to make the long axis of the specimen overlap with the stretching direction passing through center line of clamp.
3.3 The movement speed of test clamp shall meet the specified requirements.
3.4 The indicated value of test machine is 10~90% the full value of recorder (or full scale of each grade of dial), and indication error shall be within ±1%.
3.5 The instrument for measuring thickness shall meet the requirements of GB 6672.
4 Specimen
4.1 Shape and dimension of specimen
This method specifies that four types of specimens are used, among which Types I, II and III are dumb-bell shape. See Figures 1~3. Type IV is strip specimen, with width of 10~25mm, total length not less than 150mm and gauge length at least 50mm.
Unit: mm
Figure 1 Type I Specimen
L2—total length: 20; L1—initial distance between clamps: 86±5; L0—distance between mark lines: 40±0.5; d—thickness (see 6.1); R—major radius: 25+2; r—minor radius: 14±1; b—width of parallel parts: 10±0.5; b1—end width: 25±0.5
Unit: mm
Figure 2 Type II Specimen
L3—total length: 115; L2—initial distance between clamps: 80±5; L1—width of parallel parts: 33±2; L0—distance between mark lines: 25±0.25; R—major radius: 25±2; r—minor radius: 14±1; b—width of parallel parts: 6±0.4; b1—end width: 25±1; d—thickness (see 6.1)
Unit: mm
Figure 3 Type III Specimen
L3—total length: 150; L2—initial distance between clamps: 115±5; L1—width of parallel parts: 60±0.5; L0—distance between mark lines: 50±0.55; R—radius 60; d—thickness (see 6.1); b—width of parallel parts: 10±0.5; b1—end width: 20±0.5
4.2 Specimen selection
Selection may be carried out according to different products or the requirements of existing product standard. Generally, the specimen with larger elongation should not be too wide.
4.3 Specimen preparation
4.3.1 The specimen shall be cut with about equal interval along the sample width direction.
4.3.2 Both dumb-bell shape and strip specimens may be punched with stamping knife, among which the stripe specimen may also be cut with other cutter. Specimens prepared with all methods shall meet the requirements of 4.1. The specimen edge is smooth without notch. The notch may be inspected with low-power magnifier and the specimen with defective edge, if any, will be discarded.
4.3.3 Accurately print or draw mark line according to dimensional requirements of specimen. This mark line shall be free of any effect on the specimen.
4.4 Specimen quantity
The specimens are classified as one group according to each test direction, and the quantity of each group of specimens shall not be less than 5.
1 Subject Content and Application Scope
2 Normative References
3 Test Equipment
4 Specimen
5 Test Conditions
6 Test Procedures
7 Calculation and Expression of Results
8 Test Report
Additional Explanation
Plastics - Determination of Tensile Properties of Films
This standard is formulated by reference to ISO 1184-1983 Plastics - Determination of Tensile Properties of Films.
1 Subject Content and Application Scope
This standard specifies the test method for tensile property of plastic film and sheet material.
This standard is applicable to plastic film and sheet material with thickness less than 1mm while not applicable to strengthened film, micro-porous sheet material and membrane.
2 Normative References
GB 2918 Plastics – Standard Atmospheres for Conditioning and Testing
GB 6672 Plastics Film and Sheeting - Determination of Thickness by Mechanical Scanning
3 Test Equipment
3.1 Any test machine that may be used for tensile test and be able to meet 3.2, 3.3 and 3.4 may be used.
3.2 The test machine shall be equipped with proper clamp which shall not lead to breakage of specimen at clamp. During applying any load, the clamps on test machine shall be able to be aligned in a line immediately to make the long axis of the specimen overlap with the stretching direction passing through center line of clamp.
3.3 The movement speed of test clamp shall meet the specified requirements.
3.4 The indicated value of test machine is 10~90% the full value of recorder (or full scale of each grade of dial), and indication error shall be within ±1%.
3.5 The instrument for measuring thickness shall meet the requirements of GB 6672.
4 Specimen
4.1 Shape and dimension of specimen
This method specifies that four types of specimens are used, among which Types I, II and III are dumb-bell shape. See Figures 1~3. Type IV is strip specimen, with width of 10~25mm, total length not less than 150mm and gauge length at least 50mm.
Unit: mm
Figure 1 Type I Specimen
L2—total length: 20; L1—initial distance between clamps: 86±5; L0—distance between mark lines: 40±0.5; d—thickness (see 6.1); R—major radius: 25+2; r—minor radius: 14±1; b—width of parallel parts: 10±0.5; b1—end width: 25±0.5
Unit: mm
Figure 2 Type II Specimen
L3—total length: 115; L2—initial distance between clamps: 80±5; L1—width of parallel parts: 33±2; L0—distance between mark lines: 25±0.25; R—major radius: 25±2; r—minor radius: 14±1; b—width of parallel parts: 6±0.4; b1—end width: 25±1; d—thickness (see 6.1)
Unit: mm
Figure 3 Type III Specimen
L3—total length: 150; L2—initial distance between clamps: 115±5; L1—width of parallel parts: 60±0.5; L0—distance between mark lines: 50±0.55; R—radius 60; d—thickness (see 6.1); b—width of parallel parts: 10±0.5; b1—end width: 20±0.5
4.2 Specimen selection
Selection may be carried out according to different products or the requirements of existing product standard. Generally, the specimen with larger elongation should not be too wide.
4.3 Specimen preparation
4.3.1 The specimen shall be cut with about equal interval along the sample width direction.
4.3.2 Both dumb-bell shape and strip specimens may be punched with stamping knife, among which the stripe specimen may also be cut with other cutter. Specimens prepared with all methods shall meet the requirements of 4.1. The specimen edge is smooth without notch. The notch may be inspected with low-power magnifier and the specimen with defective edge, if any, will be discarded.
4.3.3 Accurately print or draw mark line according to dimensional requirements of specimen. This mark line shall be free of any effect on the specimen.
4.4 Specimen quantity
The specimens are classified as one group according to each test direction, and the quantity of each group of specimens shall not be less than 5.
Contents of GB 13022-1991
1 Subject Content and Application Scope
2 Normative References
3 Test Equipment
4 Specimen
5 Test Conditions
6 Test Procedures
7 Calculation and Expression of Results
8 Test Report
Additional Explanation
