GB 8083-1987 Natural rubber standard rubber sampling

This standard specifies the method for users to take samples from bales of natural raw rubber - standard rubber. This standard is mainly used for acceptance of goods and is not applicable to production quality control. GB 8083-1987 Natural Raw Rubber Standard Rubber Sampling GB8083-1987 Standard Download Decompression Password: www.bzxz.net

National Standard of the People's Republic of ChinawwW.bzxz.Net
Raw natural rubber
Sampling of standard rubber
Raw natural rubber-Standard rubber-Sampling
This standard refers to the international standard ISO1795-1974 "Sampling of raw rubber in packages".
1 Scope of application
This standard specifies the method for users to take samples from packages of natural raw rubber-standard rubber. This standard is mainly used for acceptance of goods and is not applicable to production quality control. 2 Definitions
This standard uses the following definitions
2.1 Whole batch: refers to all rubber packages with the same batch number and the same grade. 2.2 Large sample: refers to a group of rubber packages that can represent the whole batch of rubber. 2.3 Small sample: refers to a rubber sample taken from a package of the large sample rubber package. 2.4 Sample: refers to the rubber that is mixed evenly with a small sample and a part of it is taken out for inspection. 3 Sampling method
3.1 Sampling method for large sample rubber bales
The number of large sample rubber bales randomly selected from the total number of rubber bales in the batch shall be carried out according to the following table. Total number of rubber bales in the batch
40～100
3.2 Sampling method for small samples
UDC 678. 4. 032
GB 8083 ---87
Number of large sample rubber bales selected
Each selected large sample rubber bale shall be removed from the outer covering film, plastic packaging material, coating material or other materials on the surface of the rubber bale, and placed flat on a clean platform. Use a dry and clean knife to cut the entire rubber bale, and no lubricant is used during cutting. For block rubber pressed from granular rubber, the cutting direction shall be perpendicular to the largest surface of the rubber bale. For sheet rubber or other types of rubber, the cutting direction shall be perpendicular to the surface of the film. Continuously cut 150~600g of rubber as small samples.
3.3 Sampling method of samples
All small samples obtained shall be mixed evenly according to the conditions, equipment and methods specified in GB8084-87 "Preparation of natural rubber samples", and 600-1000g shall be taken as samples for double inspection, and the mass value shall be calculated by the average value. 4 Sampling report
The sampling report shall include the following items:
4.1 The number and grade of the whole batch of rubber packages. Approved by the Ministry of Agriculture, Animal Husbandry and Fisheries of the People's Republic of China on July 10, 1987
Implementation on January 1, 1988
The number of rubber packages of the large sample.
GB 8083-87
4.3 In order to fully identify all the detailed information required for the sample, additional notes:
This standard is under the jurisdiction of the Agricultural Reclamation Bureau of the Ministry of Agriculture, Animal Husbandry and Fisheries. This standard was drafted by the South China Tropical Crops Product Processing Design Institute. The main drafter of this standard is Deng Pingyang.
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