Some standard content:
National Standard of the People's Republic of China
Calendered film (sheet) from flexibie PVC1 Subject content and scope of application
GB/T3830-94
Replaces GB 3830-83
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of calendered films and sheets of soft polyvinyl chloride.
This standard applies to calendered films and sheets of soft polyvinyl fluoride (hereinafter referred to as films) with smooth or light patterns produced by calendering by adding plasticizers, stabilizers and other additives to suspension polyvinyl chloride resin. This standard does not apply to films after "secondary embossing" or "compounding". 2 Reference standards
GB 2828
GB2918
GB6672
GB 6673
GB13022
Counting sampling procedure and sampling table for batch inspection (applicable to inspection of continuous batches)Standard environment for conditioning and testing of plastic specimensDetermination of thickness of plastic film and sheetMechanical measurement methodDetermination of length and width of plastic film and sheetPlastics
Test method for tensile properties of films
QB/T 1130
HG 2--163
3 Product classification
Test method for right-angle tearing properties of plastics
Test method for low-temperature elongation of plastics
The classification of films is shown in Table 1.
Film for raincoats
Film or sheets for civil use
Film for printing
Film for agriculture
Film for industry
Film for toys
Main purpose
Used for processing beautiful clothes or rain gear, etc. It can also be used to make printed rain film. It can be used to make various plastic civilian products such as book covers, ticket folders, handbags, etc. It can be used to make printed civilian film. It can be used to cover or pave farmland and salt fields; it can also be used for heat preservation greenhouses of farmland or ginseng, etc. It can be used for general waterproof covering, anti-seepage pavement and outer packaging of ordinary industrial products, etc. It can be used to process inflatable plastic toys, etc.
Approved by the State Bureau of Technical Supervision on April 12, 1994, 10
Implementation on December 1, 1994
4 Technical requirements
4.1 Thickness, width
GB/T3830-94
The thickness, width and limit deviation shall conform to the provisions of Table 2. Table 2
Nominal size
0.100～0.190
0. 200~~ 0. 240
0.25~0.39
0.40~ 0. 45
Limit deviation
4.2 Length
The length of each roll shall be agreed upon by both parties, and one end breakage is allowed. 4.3 Color and pattern
Agree upon both parties.
Nominal size
≥1000
4.4 Appearance
The appearance shall comply with the provisions of Table 3, and the cumulative allowable amount and dispersion of black spots and impurities shall comply with the provisions of Table 4. Table 3
Hairiness (including cold scars)
Permanent wrinkles
Dislocation of roll end surface, mm
Superior quality, first-class quality
Clear and uniform
Not obvious
Not obvious
Not obvious
Not allowed
Not allowed
Limit deviation
Qualified products
Clear and uniform
Not allowed
Not allowed
Minor unevenness
Black spots and impurities above 0.8mm
0. 3~0. 8 mm
The allowable amount of black spots and impurities is
pieces/m2
The dispersion of black spots and impurities of 0.3~0.8mm
pieces/100mmX100mm
4.5 Physical and mechanical properties
Film for Portuguese clothing
Superior products
First-class products
Qualified products
Not allowed
The physical and mechanical properties should conform to the requirements of Table 5. No.
Tensile strength
(longitudinal and transverse)
Elongation at break
(longitudinal and transverse)
Low-temperature elongation
(longitudinal and transverse)
Right-angle tear strength
(longitudinal and transverse)
Dimensional change rate
(longitudinal and transverse)
Heating loss rate
Water extractables
Oil resistance
Film for raincoats
Superior product
GB/T 3830--94
Film for printing
Superior product
First-class product
Qualified product
Not allowed
Superior product
Qualified product
Civil and miscellaneous use
Civil and miscellaneous use sheet
Film for industry
Superior product
First-class product
Qualified product
Not allowed
Civil and miscellaneous use
Film for toys
Not allowed
Film for printing
Superior product
Qualified product
Agricultural use
≥16. 0|≥14. 0|≥13.0|≥13. 0|≥15. 0|≥16. 0≥13. 0≥11. 0≥16.0
≥130
≥200
≥180
≥150≥180≥160|≥150
≥150
≥210
Film for civil and miscellaneous use
Film for agriculture
Superior product
Qualified product
+ quality product
Not allowed|| tt||Industrial
Toys
≥200
≥220
5Test method
5.1 Sampling
GB/T3830-94
Samples must be randomly selected from each batch of delivered films. On the film roll to be selected, cut about 2m from the end inward, and then cut the sample, and mark the longitudinal direction of the film on the sample. 5.2 Thickness
Perform in accordance with the provisions of GB6672. The test results are expressed as the maximum and minimum values of the sample thickness. 5.3 Width and length
Perform in accordance with the provisions of GB6673.
When the film needs to be measured by length, its cumulative actual length should not be less than the order specification. 5.4, Color and pattern
Perform in accordance with the sample provided by the supplier.
5.5 Appearance
Visual inspection under natural light or measurement with corresponding measuring tools. The end face misalignment of the roll is measured on the sample with a steel tape measure with an accuracy of 1 mm on each side. The misalignment distance on each side should be within the specified deviation range. The curling quality is also determined by visual inspection on the sample. 5.6 Physical and mechanical properties
5.6.1 Sample preparation
According to the provisions of 5.1, cut a sufficient amount of sample horizontally, and immediately draw a mark of (250±1)mm×(250±1)mm on the sampling position of the dimensional change rate for cutting the dimensional change rate sample. Then prepare the sample according to the position shown in Figure 1. 13
GB/T 3830--94
1-Tensile strength and elongation at break test specimens; 2-Low-temperature elongation test specimens, 3-Right-angle tear strength test specimens; 4-Dimensional change test specimens: 5-Heating loss test specimens; 6-Water extract test specimens; 7-Oil resistance test specimens
5.6.2 The standard environment for test specimen state adjustment and testing shall be in accordance with the standard environment and normal deviation range specified in GB2918. The state adjustment time shall be more than 4h. 6
5.6.3 Tensile strength and elongation at break
Perform the test in accordance with the provisions of GB13022. Use type I test specimens, and the test speed (no load) is 250±25mm/min. Calculate the arithmetic mean of the test results of each group of specimens, and keep the tensile strength to the first decimal place; keep the elongation at break to the integer place. 5.6.4 Low-temperature elongation
Perform the test in accordance with the provisions of HG2-163. Calculate the arithmetic mean of the test results for each group of samples and keep the integer. 5.6.5 Right-angle tear strength
Perform according to the provisions of QB/T1130. Films are tested with overlapping specimens; sheets are tested with single specimens. Calculate the arithmetic mean of the test results of each group of specimens and retain them to the integer. Dimensional change rate
GB/T 3830--94
Cut two specimens with marked lines at the position shown in Figure 1. Each specimen should indicate the midpoint and direction of each side (see Figure 2). Place the two specimens on a flat cardboard with a small amount of talcum powder (size of about 400mm×400mm, thickness of about 1mm), cover them with another piece of cardboard sprinkled with talcum powder, and then clamp the two pieces of cardboard together with a clip. The specimen should not be constrained by the cardboard or the clip to avoid affecting the free deformation of the specimen. Place the cardboard clips containing the samples in an oven at 100 ± 2°C without overlapping, keep them under blast for 30 minutes, then take them out and place them in a standard environment for 1 hour. Remove the cardboard and measure the distance between the marks on the opposite sides of the samples with a steel ruler with an accuracy of 1 mm.
The size change rate is calculated according to formula (1):
Where:
-size change rate, %;
L--distance between the marks on the opposite sides of the sample after heating, mm; L. Distance between the marks on the opposite sides of the sample before heating, mm. Calculate the arithmetic mean of the longitudinal and transverse test results of the two samples respectively, and keep them to the integer. 5.6.7 Heating loss rate
Cut three samples of 40mm×60mm from the position shown in Figure 1, place the sample group in a desiccator for 4 hours, then take them out and weigh them one by one, with an accuracy of 0.0001g. Place the sample group in a non-air-blowing oven at 100±2℃ for 6 hours, then take it out and immediately put it in a desiccator to cool to room temperature (the sample should be hung at 2/3 of the height of the oven and placed on the same plane as the mercury ball of the thermometer. The distance between the sample and the mercury ball should not be greater than 80mm, and the distance between the samples should not be less than 30mm). Then weigh each piece accurately to 0.0001g. The heating loss rate is calculated according to formula (2):
Where: n-
-heating loss rate, %;
-mass of the sample before heating, g;
mass of the sample after heating, g.
mo2m × 100
Calculate the arithmetic mean of the test results of the three samples and retain it to the first decimal place. 5.6.8 Water extract
(2)
Cut three samples of 50 mm × 100 mm from the position shown in Figure 1. Place the sample group in a desiccator for 4 hours and then take them out. Weigh each piece to an accuracy of 0.0001 g. Place the sample group in a 500 mL beaker and inject 200 mL of distilled water into the beaker to make the sample sink into the water (if the sample floats on the water surface, it can be sunk by nylon yarn tied with a weight. The samples should not touch each other or stick to the wall of the beaker). Place the beaker at a constant temperature of 50 ± 2 ° C. After 24 hours, take out the samples from the beaker and place each sample between two dry filter papers to absorb the moisture. Then place the sample in an oven at 50 ± 2 ° C for 8 hours and then take it out. Cool it to room temperature in the desiccator. Weigh each piece to an accuracy of 0.0001 g. The water extract is calculated according to formula (3):
G. G
（3）
Where: q-water extract, %;
G——original mass of the sample, g,
GB/T 3830----94
G—mass of the sample after the water extraction test, g. Calculate the arithmetic mean of the test results of the three samples and keep it to the first decimal place. 5.6.9 Oil resistance
Cut three samples of 50mm×10mm according to the position shown in Figure 1, place the sample group in 60±1℃ aviation oil or No. 10 engine oil for 5h, then take it out and cool it to room temperature. After gently wiping the surface of the sample with gasoline, fold the sample 180° one by one, then flatten it and check the folded part. All three samples should not be broken (the folded part is allowed to be white). 6
Inspection rules
6.1 Batch
The membrane is inspected in batches. The diaphragms produced on the same equipment, with the same formula and the same specification are considered as one batch. The quantity of each batch should not exceed the production of the shift.
6.2 Sampling
A random sampling method is adopted.
Specifications and appearance are in accordance with the provisions of GB2828, and a normal inspection secondary sampling plan is adopted, with general inspection level II and qualified quality level (AQL) 6.5, see Table 6.
Physical and mechanical properties One roll is selected from each batch. Table 6
Batch range
16～50
91～150
151~280
281～500
6.3 Inspection classification
6.3.1 Factory inspection
Number of samples to be drawn
Cumulative number of samples to be drawn
Number of samples
Factory inspection items include all items except water extract and oil resistance. 6.3.2 Type inspection
Number of qualified judgments
Number of unqualified judgments
Inspection shall be carried out in accordance with all technical requirements specified in this standard. During normal production, it should be conducted at least once every three months; type inspection should also be conducted in any of the following circumstances:
GB/T 3830-94
When the national quality supervision agency proposes a requirement for type inspection; When there is a significant difference between the relevant inspection results of the factory inspection and the previous type inspection; During normal production, if there are significant changes in raw materials and processes that may affect product performance; When the product is suspended for a long time and then resumed;
When finalizing and appraising new products or transferring old products to another factory for production. 6.4
Judgment rules
6.4.1 Quality judgment of sample units
Specifications and appearance shall be carried out in accordance with the provisions of 4.1, 4.2, 4.3 and 4.4. If all the inspected items are qualified, the sample unit is qualified. 6.4.2 Quality judgment of qualified batches
Specifications and appearance shall be carried out in accordance with the provisions of Table 6.
If there are unqualified items in the physical and mechanical properties test results, double samples should be taken from the original batch again, and the unqualified items should be retested. If all the retests are qualified, the batch is qualified. 6.4.3 Determination of product quality grade
Determine according to the lowest grade of all test results. 7 Marking, packaging, transportation, storage
7.1 Marking
The outer packaging of each roll of diaphragm should have the following marks: a.
Manufacturer name and address;
Product name;
Registered trademark;
Product specifications;
Manufacturing date or production batch number,
Product quality grade mark and implemented standard number; inspector code;
Net weight (generally 20 to 60kg).
7.2 Packaging
The diaphragm uses a hard plastic tube or paper tube as the roll core. The outside of the roll (including the end face) should be wrapped with film, kraft paper or other packaging materials. 7.3 Transportation
During transportation, the film should be protected from mechanical collision; rain, sun exposure and pollution. 7.4 Storage
The film should be neatly placed horizontally in a clean, cool and dry warehouse, and the packaging should be kept intact. The film should not be stacked too high, generally not more than six layers, and the distance from the heat source should not be less than 1㎡. The storage period of the film is one year from the date of production. Additional remarks:
This standard is proposed by the China Light Industry General Association.
This standard is under the jurisdiction of the National Technical Committee for Standardization of Plastic Products. This standard was drafted by Beijing Plastic Factory No. 2. The main drafters of this standard are Wang Zhiping, Jiang Yunju and Ding Fan. This standard refers to the American Society for Testing and Materials standard ASTMD1593-89 "Non-rigid polyvinyl chloride film". 170001g. Put the sample group into a non-air-blowing oven at 100±2℃ and keep it at constant temperature for 6 hours, then take it out and immediately put it into a desiccator to cool to room temperature (the sample should be hung at 2/3 of the height of the oven and placed on the same plane as the mercury ball of the thermometer. The distance between the sample and the mercury ball should not be greater than 80mm, and the distance between the samples should not be less than 30mm). Then weigh each piece accurately to 0.0001g. The heating loss rate is calculated according to formula (2): bzxZ.net
Where: n-
-heating loss rate, %;
-mass of the sample before heating, g;
mass of the sample after heating, g.
mo2m × 100
Calculate the arithmetic mean of the test results of the three samples and keep it to the first decimal place. 5.6.8 Water extract
(2)
Cut three samples of 50 mm × 100 mm from the position shown in Figure 1. Place the sample group in a desiccator for 4 hours and then take them out. Weigh each piece to an accuracy of 0.0001 g. Place the sample group in a 500 mL beaker and inject 200 mL of distilled water into the beaker to make the sample sink into the water (if the sample floats on the water surface, it can be sunk by nylon yarn tied with a weight. The samples should not touch each other or stick to the wall of the beaker). Place the beaker at a constant temperature of 50 ± 2 ° C. After 24 hours, take out the samples from the beaker and place each sample between two dry filter papers to absorb the moisture. Then place the sample in an oven at 50 ± 2 ° C for 8 hours and then take it out. Cool it to room temperature in the desiccator. Weigh each piece to an accuracy of 0.0001 g. The water extract is calculated according to formula (3):
G. G
（3）
Where: q-water extract, %;
G——original mass of the sample, g,
GB/T 3830----94
G—mass of the sample after the water extraction test, g. Calculate the arithmetic mean of the test results of the three samples and keep it to the first decimal place. 5.6.9 Oil resistance
Cut three samples of 50mm×10mm according to the position shown in Figure 1, place the sample group in 60±1℃ aviation oil or No. 10 engine oil for 5h, then take it out and cool it to room temperature. After gently wiping the surface of the sample with gasoline, fold the sample 180° one by one, then flatten it and check the folded part. All three samples should not be broken (the folded part is allowed to be white). 6
Inspection rules
6.1 Batch
The membrane is inspected in batches. The diaphragms produced on the same equipment, with the same formula and the same specification are considered as one batch. The quantity of each batch should not exceed the production of the shift.
6.2 Sampling
A random sampling method is adopted.
Specifications and appearance are in accordance with the provisions of GB2828, and a normal inspection secondary sampling plan is adopted, with general inspection level II and qualified quality level (AQL) 6.5, see Table 6.
Physical and mechanical properties One roll is selected from each batch. Table 6
Batch range
16～50
91～150
151~280
281～500
6.3 Inspection classification
6.3.1 Factory inspection
Number of samples to be drawn
Cumulative number of samples to be drawn
Number of samples
Factory inspection items include all items except water extract and oil resistance. 6.3.2 Type inspection
Number of qualified judgments
Number of unqualified judgments
Inspection shall be carried out in accordance with all technical requirements specified in this standard. During normal production, it should be conducted at least once every three months; type inspection should also be conducted in any of the following circumstances:
GB/T 3830-94
When the national quality supervision agency proposes a requirement for type inspection; When there is a significant difference between the relevant inspection results of the factory inspection and the previous type inspection; During normal production, if there are significant changes in raw materials and processes that may affect product performance; When the product is suspended for a long time and then resumed;
When finalizing and appraising new products or transferring old products to another factory for production. 6.4
Judgment rules
6.4.1 Quality judgment of sample units
Specifications and appearance shall be carried out in accordance with the provisions of 4.1, 4.2, 4.3 and 4.4. If all the inspected items are qualified, the sample unit is qualified. 6.4.2 Quality judgment of qualified batches
Specifications and appearance shall be carried out in accordance with the provisions of Table 6.
If there are unqualified items in the physical and mechanical properties test results, double samples should be taken from the original batch again, and the unqualified items should be retested. If all the retests are qualified, the batch is qualified. 6.4.3 Determination of product quality grade
Determine according to the lowest grade of all test results. 7 Marking, packaging, transportation, storage
7.1 Marking
The outer packaging of each roll of diaphragm should have the following marks: a.
Manufacturer name and address;
Product name;
Registered trademark;
Product specifications;
Manufacturing date or production batch number,
Product quality grade mark and implemented standard number; inspector code;
Net weight (generally 20 to 60kg).
7.2 Packaging
The diaphragm uses a hard plastic tube or paper tube as the roll core. The outside of the roll (including the end face) should be wrapped with film, kraft paper or other packaging materials. 7.3 Transportation
During transportation, the film should be protected from mechanical collision, rain, sun exposure and pollution. 7.4 Storage
The film should be neatly placed horizontally in a clean, cool and dry warehouse, and the packaging should be kept intact. The film should not be stacked too high, generally not more than six layers, and the distance from the heat source should not be less than 1㎡. The storage period of the film is one year from the date of production. Additional remarks:
This standard is proposed by the China Light Industry General Association.
This standard is under the jurisdiction of the National Technical Committee for Standardization of Plastic Products. This standard was drafted by Beijing No. 2 Plastic Factory. The main drafters of this standard are Wang Zhiping, Jiang Yunju and Ding Fan. This standard refers to the American Society for Testing and Materials standard ASTMD1593-89 "Non-rigid polyvinyl chloride film". 170001g. Put the sample group into a non-air-blowing oven at 100±2℃ and keep it at constant temperature for 6 hours, then take it out and immediately put it into a desiccator to cool to room temperature (the sample should be hung at 2/3 of the height of the oven and placed on the same plane as the mercury ball of the thermometer. The distance between the sample and the mercury ball should not be greater than 80mm, and the distance between the samples should not be less than 30mm). Then weigh each piece accurately to 0.0001g. The heating loss rate is calculated according to formula (2):
Where: n-
-heating loss rate, %;
-mass of the sample before heating, g;
mass of the sample after heating, g.
mo2m × 100
Calculate the arithmetic mean of the test results of the three samples and keep it to the first decimal place. 5.6.8 Water extract
(2)
Cut three samples of 50 mm × 100 mm from the position shown in Figure 1. Place the sample group in a desiccator for 4 hours and then take them out. Weigh each piece to an accuracy of 0.0001 g. Place the sample group in a 500 mL beaker and inject 200 mL of distilled water into the beaker to make the sample sink into the water (if the sample floats on the water surface, it can be sunk by nylon yarn tied with a weight. The samples should not touch each other or stick to the wall of the beaker). Place the beaker at a constant temperature of 50 ± 2 ° C. After 24 hours, take out the samples from the beaker and place each sample between two dry filter papers to absorb the moisture. Then place the sample in an oven at 50 ± 2 ° C for 8 hours and then take it out. Cool it to room temperature in the desiccator. Weigh each piece to an accuracy of 0.0001 g. The water extract is calculated according to formula (3):
G. G
（3）
Where: q-water extract, %;
G——original mass of the sample, g,
GB/T 3830----94
G—mass of the sample after the water extraction test, g. Calculate the arithmetic mean of the test results of the three samples and keep it to the first decimal place. 5.6.9 Oil resistance
Cut three samples of 50mm×10mm according to the position shown in Figure 1, place the sample group in 60±1℃ aviation oil or No. 10 engine oil for 5h, then take it out and cool it to room temperature. After gently wiping the surface of the sample with gasoline, fold the sample 180° one by one, then flatten it and check the folded part. All three samples should not be broken (the folded part is allowed to be white). 6
Inspection rules
6.1 Batch
The membrane is inspected in batches. The diaphragms produced on the same equipment, with the same formula and the same specification are considered as one batch. The quantity of each batch should not exceed the production of the shift.
6.2 Sampling
A random sampling method is adopted.
Specifications and appearance are in accordance with the provisions of GB2828, and a normal inspection secondary sampling plan is adopted, with general inspection level II and qualified quality level (AQL) 6.5, see Table 6.
Physical and mechanical properties One roll is selected from each batch. Table 6
Batch range
16～50
91～150
151~280
281～500
6.3 Inspection classification
6.3.1 Factory inspection
Number of samples to be drawn
Cumulative number of samples to be drawn
Number of samples
Factory inspection items include all items except water extract and oil resistance. 6.3.2 Type inspection
Number of qualified judgments
Number of unqualified judgments
Inspection shall be carried out in accordance with all technical requirements specified in this standard. During normal production, it should be conducted at least once every three months; type inspection should also be conducted in any of the following circumstances:
GB/T 3830-94
When the national quality supervision agency proposes a requirement for type inspection; When there is a significant difference between the relevant inspection results of the factory inspection and the previous type inspection; During normal production, if there are significant changes in raw materials and processes that may affect product performance; When the product is suspended for a long time and then resumed;
When finalizing and appraising new products or transferring old products to another factory for production. 6.4
Judgment rules
6.4.1 Quality judgment of sample units
Specifications and appearance shall be carried out in accordance with the provisions of 4.1, 4.2, 4.3 and 4.4. If all the inspected items are qualified, the sample unit is qualified. 6.4.2 Quality judgment of qualified batches
Specifications and appearance shall be carried out in accordance with the provisions of Table 6.
If there are unqualified items in the physical and mechanical properties test results, double samples should be taken from the original batch again, and the unqualified items should be retested. If all the retests are qualified, the batch is qualified. 6.4.3 Determination of product quality grade
Determine according to the lowest grade of all test results. 7 Marking, packaging, transportation, storage
7.1 Marking
The outer packaging of each roll of diaphragm should have the following marks: a.
Manufacturer name and address;
Product name;
Registered trademark;
Product specifications;
Manufacturing date or production batch number,
Product quality grade mark and implemented standard number; inspector code;
Net weight (generally 20 to 60kg).
7.2 Packaging
The diaphragm uses a hard plastic tube or paper tube as the roll core. The outside of the roll (including the end face) should be wrapped with film, kraft paper or other packaging materials. 7.3 Transportation
During transportation, the film should be protected from mechanical collision, rain, sun exposure and pollution. 7.4 Storage
The film should be neatly placed horizontally in a clean, cool and dry warehouse, and the packaging should be kept intact. The film should not be stacked too high, generally not more than six layers, and the distance from the heat source should not be less than 1㎡. The storage period of the film is one year from the date of production. Additional remarks:
This standard is proposed by the China Light Industry General Association.
This standard is under the jurisdiction of the National Technical Committee for Standardization of Plastic Products. This standard was drafted by Beijing No. 2 Plastic Factory. The main drafters of this standard are Wang Zhiping, Jiang Yunju and Ding Fan. This standard refers to the American Society for Testing and Materials standard ASTMD1593-89 "Non-rigid polyvinyl chloride film". 17See Table 6.
Physical and mechanical properties One roll is selected from each batch. Table 6
Batch range
16~50
91~150
151~280
281~500
6.3 Inspection classification
6.3.1 Factory inspection
Number of samples to be selected
Cumulative sampling
Number of samples
Factory inspection items are all items except water extract and oil resistance. 6.3.2 Type inspection
Number of qualified judgments
Number of unqualified judgments
Inspection shall be carried out in accordance with all technical requirements specified in this standard. During normal production, it should be conducted at least once every three months; type inspection should also be conducted in any of the following circumstances:
GB/T 3830-94
When the national quality supervision agency proposes a requirement for type inspection; When there is a significant difference between the relevant inspection results of the factory inspection and the previous type inspection; During normal production, if there are significant changes in raw materials and processes that may affect product performance; When the product is suspended for a long time and then resumed;
When finalizing and appraising new products or transferring old products to another factory for production. 6.4
Judgment rules
6.4.1 Quality judgment of sample units
Specifications and appearance shall be carried out in accordance with the provisions of 4.1, 4.2, 4.3 and 4.4. If all the inspected items are qualified, the sample unit is qualified. 6.4.2 Quality judgment of qualified batches
Specifications and appearance shall be carried out in accordance with the provisions of Table 6.
If there are unqualified items in the physical and mechanical properties test results, double samples should be taken from the original batch again, and the unqualified items should be retested. If all the retests are qualified, the batch is qualified. 6.4.3 Determination of product quality grade
Determine according to the lowest grade of all test results. 7 Marking, packaging, transportation, storage
7.1 Marking
The outer packaging of each roll of diaphragm should have the following marks: a.
Manufacturer name and address;
Product name;
Registered trademark;
Product specifications;
Manufacturing date or production batch number,
Product quality grade mark and implemented standard number; inspector code;
Net weight (generally 20 to 60kg).
7.2 Packaging
The diaphragm uses a hard plastic tube or paper tube as the roll core. The outside of the roll (including the end face) should be wrapped with film, kraft paper or other packaging materials. 7.3 Transportation
During transportation, the film should be protected from mechanical collision, rain, sun exposure and pollution. 7.4 Storage
The film should be neatly placed horizontally in a clean, cool and dry warehouse, and the packaging should be kept intact. The film should not be stacked too high, generally not more than six layers, and the distance from the heat source should not be less than 1㎡. The storage period of the film is one year from the date of production. Additional remarks:
This standard is proposed by the China Light Industry General Association.
This standard is under the jurisdiction of the National Technical Committee for Standardization of Plastic Products. This standard was drafted by Beijing No. 2 Plastic Factory. The main drafters of this standard are Wang Zhiping, Jiang Yunju and Ding Fan. This standard refers to the American Society for Testing and Materials standard ASTMD1593-89 "Non-rigid polyvinyl chloride film". 17See Table 6.
Physical and mechanical properties One roll is selected from each batch. Table 6
Batch range
16~50
91~150
151~280
281~500
6.3 Inspection classification
6.3.1 Factory inspection
Number of samples to be selected
Cumulative sampling
Number of samples
Factory inspection items are all items except water extract and oil resistance. 6.3.2 Type inspection
Number of qualified judgments
Number of unqualified judgments
Inspection shall be carried out in accordance with all technical requirements specified in this standard. During normal production, it should be conducted at least once every three months; type inspection should also be conducted in any of the following circumstances:
GB/T 3830-94
When the national quality supervision agency proposes a requirement for type inspection; When there is a significant difference between the relevant inspection results of the factory inspection and the previous type inspection; During normal production, if there are significant changes in raw materials and processes that may affect product performance; When the product is suspended for a long time and then resumed;
When finalizing and appraising new products or transferring old products to another factory for production. 6.4
Judgment rules
6.4.1 Quality judgment of sample units
Specifications and appearance shall be carried out in accordance with the provisions of 4.1, 4.2, 4.3 and 4.4. If all the inspected items are qualified, the sample unit is qualified. 6.4.2 Quality judgment of qualified batches
Specifications and appearance shall be carried out in accordance with the provisions of Table 6.
If there are unqualified items in the physical and mechanical properties test results, double samples should be taken from the original batch again, and the unqualified items should be retested. If all the retests are qualified, the batch is qualified. 6.4.3 Determination of product quality grade
Determine according to the lowest grade of all test results. 7 Marking, packaging, transportation, storage
7.1 Marking
The outer packaging of each roll of diaphragm should have the following marks: a.
Manufacturer name and address;
Product name;
Registered trademark;
Product specifications;
Manufacturing date or production batch number,
Product quality grade mark and implemented standard number; inspector code;
Net weight (generally 20 to 60kg).
7.2 Packaging
The diaphragm uses a hard plastic tube or paper tube as the roll core. The outside of the roll (including the end face) should be wrapped with film, kraft paper or other packaging materials. 7.3 Transportation
During transportation, the film should be protected from mechanical collision, rain, sun exposure and pollution. 7.4 Storage
The film should be neatly placed horizontally in a clean, cool and dry warehouse, and the packaging should be kept intact. The film should not be stacked too high, generally not more than six layers, and the distance from the heat source should not be less than 1㎡. The storage period of the film is one year from the date of production. Additional remarks:
This standard is proposed by the China Light Industry General Association.
This standard is under the jurisdiction of the National Technical Committee for Standardization of Plastic Products. This standard was drafted by Beijing No. 2 Plastic Factory. The main drafters of this standard are Wang Zhiping, Jiang Yunju and Ding Fan. This standard refers to the American Society for Testing and Materials standard ASTMD1593-89 "Non-rigid polyvinyl chloride film". 17
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