HG/T 2947-1986 Aluminum back kettle rubber gasket seal HG/T2947-1986 standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
Rubber gasket for aluminium canteenUDC 685.51:678
HG2947—1986(1997)
Replaces GB7057—1986
This standard applies to the sealing gaskets for aluminium canteens (hereinafter referred to as gaskets) made of rubber as the main raw material and processed with a specific formula. This standard also applies to the sealing gaskets of other materials. Structure and specifications
Structure: The structure is shown in Figure 1:
The specifications and dimensions shall comply with the provisions of Table 1.
Note: In addition to the specifications specified in Table 1, production can be carried out according to the specifications proposed by the user. Technical requirements
The physical and mechanical properties of the rubber compound used for gaskets shall comply with the provisions of Table 2. Table 2
Tear strength, MPa (kgf/cm2)
Tear elongation, %
Tear permanent deformation, %
Hardness (Shore A type), degree
Hot air aging
(90℃,24 h)
Change rate of tear strength, %
Change rate of tear elongation, %
2.2 The sanitary quality indicators of gaskets shall comply with the provisions of Table 3. Issued by the National Bureau of Standards on November 24, 1986
Not less than
Not less than
Not greater than
-25～10
—30~10
Implemented on October 1, 1987
Evaporation residue in distilled water
Potassium permanganate consumption (water immersion solution)
Zinc content (4% acetic acid immersion solution)
Lead content (4% acetic acid immersion solution)
HG 2947—1986(1997)
Not greater than
Not greater than
Not greater than
Not greater than
The appearance quality of the gasket shall comply with the requirements of Table 4. 2.3
Test method
Defect name
Concave, bubble
Trimming mark
Spongy, impurity
Qualified product requirements
No working surface is allowed, but non-working surface is allowed, but the depth is not more than 0.5 mm, the area is not more than 2mm2, and the whole gasket is not more than 2 places
Slight, but the depth should not exceed 1 mm is not allowed
Slight color wood hook and water vapor stains are allowed to be slight
Not allowed
The appearance quality of the gasket is checked by visual inspection, and the product size is measured with a measuring tool with an accuracy of 0.02mm. 3.1
3.2 Physical and mechanical properties test of rubber for gaskets 3.2.1 The sample preparation for physical and mechanical properties test shall be carried out in accordance with the relevant provisions of GB527-1983 "General requirements for physical test methods of vulcanized rubber".
3.2.2 The tensile strength, elongation and permanent deformation tests are carried out in accordance with GB528--1982 "Determination of tensile properties of vulcanized rubber". 3.2.3 The hardness test is carried out in accordance with GB531-1983 "Rubber Shore A hardness test method". 3.2.4 The hot air aging test is carried out in accordance with GB3512-1983 "Rubber hot air aging test method". 3.3 Gasket sanitation project test
Sample treatment: Wash the gasket sample with detergent, rinse with tap water, and then rinse with distilled water three times and dry. Weigh about 20g of gasket sample 3.3.1
for soaking.
Soaking conditions
Soaking in distilled water: After boiling for half an hour, add distilled water to the original volume. Soaking in 4% acetic acid: Reflux at boiling point for half an hour. Calculate by adding 20mL of soaking liquid to 1g sample by weight. 3.3.3 The test method shall be carried out in accordance with the test method of GB4808-1984 "Sanitary Standard for Sealing Rings of Pressure Cookers for Food". 4 Inspection Rules
4.1 Gasket products shall be inspected by the quality supervision department of the manufacturer in accordance with the provisions of this standard. The manufacturer shall ensure that the products leaving the factory meet the requirements of this standard, and each batch of qualified products shall be accompanied by a product quality certificate. 4.2 The physical and mechanical properties test of the rubber compound for gaskets shall be conducted on the rubber compound of the same shift and the same machine as a batch, and each batch shall be inspected in accordance with the provisions of 1, 2, 3, and 4 in Table 2 of Article 2.1 of this standard. Hot air aging shall be inspected at least once a month. The sanitary quality indicators of gaskets shall be inspected at least once a quarter. If one of the inspection results is unqualified, double samples shall be drawn to repeat the test. If one of the retest results is unqualified, the batch of 82
rubber compound or product shall be unqualified.
HG2947-1986(1997)
4.3 Under normal production conditions, the product specifications and dimensions shall be inspected according to the provisions of Table 1 in 1.2, and the number of inspections shall not be less than one dry percent of the batch. 4.4 The appearance quality of gaskets shall be inspected 100% according to the provisions of 2.3 of this standard. 4.5 When inspecting and accepting gaskets, the number of inspections shall not be less than 5% of the batch. The inspection results show that the appearance defect leakage rate shall not exceed 2% of the inspection number. Otherwise, double the number of products shall be sampled for re-inspection. If the inspection results show that the appearance defect rate still exceeds 2% of the inspection number, the batch of products shall be reworked 100% by the manufacturer for appearance quality inspection and sorting, and can only be shipped after passing the inspection. 4.6 If the inspection results of the supply and demand parties are inconsistent, the two parties can negotiate to resolve the problem. If the problem cannot be resolved, the professional supervision department shall arbitrate. Marking, packaging, transportation and storage
5.1 Marking
The packaging should be marked, including the following: a.
Product name and specifications;
Manufacturer name;bZxz.net
Quantity and weight;
Production date;
Batch number;
The words "Rubber products for food, keep clean". 5.2 Packaging
5.2.1The packaging materials and quantity shall be negotiated by the supply and demand parties. 5.2.2The packaging materials of the contact gasket shall meet the requirements of sanitary packaging. 5.3 Transportation and storage
5.3.1During transportation and storage, the product should be kept away from sunlight, rain and snow, and should not be in contact or coexistence with acids, alkalis, oils and organic solvents that affect the quality of rubber and are harmful to the human body, and should be kept clean. 5.3.2 The product should be stored in a well-ventilated warehouse with a temperature between -10℃ and 30℃ and a relative humidity of no more than 80%. It should be stored 1m away from heat sources and 0.3m above the ground to avoid heavy pressure. 5.3.3 Under the above storage conditions, the storage period of the gasket is one year from the date of manufacture. Additional remarks:
This standard was proposed by the Ministry of Chemical Industry and the Ministry of Health of the People's Republic of China and is under the jurisdiction of the Shanghai Rubber Products Research Institute and the Food Hygiene Supervision and Inspection Institute of the Ministry of Health.
This standard was drafted by Shanghai Rubber Products Factory No. 4 and Shanghai Food Hygiene Supervision and Inspection Institute. The main drafters of this standard are Li Cen, Liu Hongbiao and Zhu Yan. 83
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