Some standard content:
Chemical Industry Standard of the People's Republic of China
Rubber Hot Water Bag
1 Subject Content and Scope of Application
HG 2011—91
This standard specifies the structure, technical requirements, test methods, acceptance rules and instructions for use of rubber hot water bags (hereinafter referred to as hot water bags). This standard applies to hot water bags made of non-toxic and non-irritating materials such as natural rubber and synthetic rubber. It is mainly used for medical care and general heating.
2 Reference Standards
GB527 General Requirements for Physical Tests of Vulcanized Rubber GB528 Determination of Tensile Properties of Vulcanized Rubber
GB/T 2941 Standard Temperature, Humidity and Time for Environmental Conditioning and Testing of Rubber Samples GB3512 Rubber Hot Air Aging Test Method 3 Structure and Specifications
3.1 The hot water bag consists of a bag body and a sealing part (including a plug seat, a threaded cover, a threaded mouth, and a gasket). The bag body, plug seat and gasket are made of rubber and other polymer materials; the threaded cover and threaded mouth are made of stainless metal and non-metallic materials. The structural diagram is as follows: 1-Bag body head and tail;
2-Bag body
Threaded cover
Note: The shape of the bag body can be determined according to the agreement between the supply and demand parties. Rubber plug
3.2 The specifications of the hot water bag should comply with the provisions of Table 1. For the sealing part, please refer to Appendix A. The Ministry of Chemical Industry of the People's Republic of China approved the threaded mouth on June 27, 1991. Threaded mouth gasket ring implemented on December 1, 1991. Technical requirements HG 2011-91 2000±100 1700±100 100 1000±100 500±100 The physical and mechanical properties of hot water bottles shall conform to the requirements of Table 2. 4.1
Performance items
Tensile strength, MPa
Elongation at break, %
70±1℃×166±2h
Hot air agingwwW.bzxz.Net
70±1℃×72h
100±1℃×166±2h
Hot water aging
100±1℃×72h
Change rate of tensile strength, %
Change rate of elongation at break, %| |tt||Tensile strength change rate, %
Elongation at break change rate, %
Tensile strength change rate, %
Elongation at break change rate, %
Tensile strength change rate, %
Elongation at break change rate, %
Minimum thickness of bag body
Superior product
First-class product
Qualified product
Note: The "-" in the table indicates a decrease in the index, not a negative sign in mathematics. 4.1.1 Samples with patterns need to be polished. If the values of tensile strength and elongation at break reach 80% of those specified in Table 3, they are considered to meet the requirements of this standard.
4.1.2 The tensile strength of products made by injection technology shall not be less than 10MPa. 4.2 Hot water bags shall be made of materials without color pollution. 4.3 Hot water bags shall not leak under specified conditions. The surface quality of hot water bags shall meet the requirements of Table 3. Superior products are subject to the provisions of first-class products. 4.4
Defect Name
Water Marks and Stripes
Unclear Pattern
Stains and Stain
5Test Method
HG 2011—91
No glue is allowed to be missing on the bag body; glue missing at the head and tail of the bag body is not greater than qualified products
No glue missing at the head and tail is not greater than 4mm2, and two places are allowed; 2.5mm2 is allowed in one place; Deep pattern water bag pattern Deep pattern water pattern is allowed to have glue missing, and its depth does not exceed 1/2 of the total thickness of the place, and the total cumulative length does not exceed 1/3, and the total cumulative length does not exceed 10mm
No impurities are allowed on the bag body, and no more than two impurities with a diameter of less than 1mm are allowed at the head and tail
No bubbles are allowed on the bag body, and the diameter of bubbles at the head and tail is less than 1mm If the bag is not broken within 25mm, two spots are allowed. The bag body is not allowed to have scratches caused by hard objects. The bag body color is uniform
Not allowed
If the bag body model pattern is unclear, it is not allowed. The bag body surface is basically clean, but insignificant stains are allowed
5.1 The surface quality of the hot water bag is inspected by visual inspection and measuring tools. 25mm
The diameter of the bag body is less than 0.5mm, and it meets the thickness requirements after removal. Two spots are allowed
Bubble in the bag body is not allowed, and the diameter of the bubble at the head and tail is within 1.5mm. Three spots are allowed
Severe injuries caused by hard objects are not allowed. Insignificant color difference is allowed
Minor ones are allowed
Light stains are allowed
The total stains on each side shall not exceed 250mm2
5.2 The thickness of the hot water bag is measured by a thickness gauge, caliper and other measuring tools with an accuracy of 0.01mm. During arbitration inspection, use a large tool microscope or reading microscope to measure: cut along the periphery of the water bag, divide it into two pieces, find the thinnest part, then cut it at the thinnest part, and make a 25mm×10mm test piece, attach the test piece to a bracket, and observe its thickness under a large tool microscope or reading microscope. Record its minimum thickness value within 25mm along the thinnest point.
5.3 The capacity of the hot water bag is to inject 23±2℃ water from the neck of the bag to the bottom edge of the plug seat, and then use a measuring tube to measure the volume of water. 5.4 Physical and mechanical properties of hot water bag
5.4.1 General requirements for the test method of physical and mechanical properties shall be implemented in accordance with the provisions of GB527. 5.4.2 The standard temperature, humidity and time of the parking and testing of the sample shall be implemented in accordance with the provisions of GB2941. 5.4.3 Tensile strength and elongation at break shall be implemented in accordance with the provisions of GB528. Use a type 1 cutter for testing. Cut along the periphery of the water bag, divide it into two pieces, and cut the test piece along the rolling direction. 5.4.4 The hot air aging test is carried out in accordance with the provisions of GB3512. 5.4.5 The hot water aging test is to hang the sample in a free state in a constant temperature water tank of 100±1℃ and heat it to the specified time. The test and calculation methods are the same as those of GB3512.
5.5 Leakage test
5.5.1 Fill the hot water bag with compressed air to eight times the height of the bag body when it is laid flat, and check whether there is leakage. 217
HG201191
5.5.2 Fill the hot water bag with 90℃ water to 2/3 of the rated capacity, cover it after exhausting the air, clamp it between two wooden boards, apply a load of 20kg until 10 minutes, and immediately check whether there is any leakage. 5.6 Contamination test
Fill the hot water bag with 90℃ water, cover it and leave it for 5 minutes, wipe it gently with absorbent cotton, and observe whether there is any contamination. 6 Acceptance rules
6.1 Hot water bags shall be inspected and accepted by the quality inspection department of the manufacturer in batches. The manufacturer shall ensure that the products shipped meet the technical requirements of this standard and be accompanied by product certificates.
6.2 Hot water bags shall be inspected 100% in accordance with the provisions of Articles 5.1 and 5.5.1 of this standard before leaving the factory. 6.3 Other items of hot water bags shall be inspected at least twice a month, and aging performance inspection shall be conducted at least once a month. Each time, no less than 3 samples shall be drawn and conducted in accordance with the provisions of Articles 5.2, 5.3, 5.4, 5.5.2 and 5.6 of this standard. If one of the indicators in the inspection results does not meet the requirements of this standard, double samples shall be taken for retesting the unqualified items. If they still do not meet the requirements of the standard, the batch of products shall be unqualified. 6.4 The ordering party shall accept 10,000 pieces as a batch, and no less than 1% of each batch shall be drawn for surface quality, specification and leakage inspection. If the number of unqualified products exceeds 5% of the number of samples, double the number of samples shall be taken for re-inspection. If the products still fail to meet the standard, the batch of products shall be considered unqualified. If other items need to be inspected, no less than 3 samples shall be taken each time. The judgment rules shall be implemented in accordance with the provisions of Article 6.3. 7 Marking, packaging, transportation and storage
7.1 Each product package shall have the following marks: product name, specification, production batch number or date, manufacturer, trademark, precautions for use, inspector code, etc. The marks on the outer packaging shall be marked according to the requirements of the ordering party. 7.2 The packaging of hot water bags shall be handled in accordance with the agreement between the supply and demand parties. 7.3 Hot water bags shall be loaded in covered carriages during transportation to avoid sunlight, rain and snow. Do not use sharp tools such as iron hooks during loading and unloading to avoid damaging the bag.
7.4 Hot water bags shall be stored in a warehouse with a temperature of 0-37℃ and a relative humidity of no more than 85%, and placed on a wooden rack more than 20cm above the ground and walls.
7.5 When storing, the hot water bag must not come into contact with acid, alkali, grease or other substances that damage rubber, and must be kept 1.5m away from heat sources. 7.6 According to the above storage conditions, the manufacturer guarantees that the product quality will comply with the provisions of this standard within a storage period of one year from the date of production. 8 Instructions for use
8.1 The hot water used should be around 90℃. The water filling volume should not exceed 2/3 of the rated capacity of the hot water bag, and it should not come into contact with acid, alkali, or grease.
8.2 After filling with water, exhaust the air, tighten the threaded cap, squeeze the bag by hand, and check for water leakage. 8.3 Avoid heavy pressure and puncture with sharp objects during use and storage. 8.4 The hot water bag should be stored flat in a cool and dry place. 8.5 When in use, the hot water bag should be placed away from infants and young children. 8.6 Under the above storage and use conditions, if there is water leakage at the bag mouth within one year from the date of production, it will be repaired free of charge. 218
Part name
Threaded cap
Threaded port
Additional instructions:
HG 2011—
Specifications and dimensions of metal material sealing parts
(reference part)
Outer diameter
20.5±0.5
Thread 23±0.2
Matched threaded cap
Inner diameter
This standard is proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Beijing Rubber Products Design Institute. Thickness
Screw 25.4mm
This standard is drafted by Beijing Rubber Products Design Institute. Shanghai Yonghe Rubber Factory, Beijing Chemical Building Materials Factory, Guangzhou Third Rubber Factory, Qingdao Rubber Products Factory, and Bengbu Latex Factory participated in the drafting. The main drafters of this standard are Zhang Chengyan and Liu Bing. This standard adopts the American Society for Testing and Materials standard ASTMD4316-84 "Rubber Water Bag". From the date of implementation of this standard, the original Chemical Industry Department standard HG4-560-67 will be invalid.
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