HG/T 2013-2001 Rubber Rollers Part 3: Fabric Pre-Shrunk Rubber Blankets
Some standard content:
Record number: 10137-2002
HG/T 2013-2001
This standard is a revision of the recommended chemical industry standard HG/T2013-1991 "Fabric Pre-shrink Rubber Blanket" based on domestic production actual measurement data and usage requirements.
The main technical differences between this standard and HG/T2013-1991 are: -The product's rebound index has been improved.
The requirements for flex cracking have been added.
Product classification has been cancelled.
Appendix A of this standard is a reminder appendix.
This standard will replace HG/T2013-1991 from the date of implementation. This standard was proposed by the Policy and Regulations Department of the former State Administration of Petroleum and Chemical Industry. This standard was proposed and managed by the Rubber Miscellaneous Products Branch of the National Technical Committee for Standardization of Rubber and Rubber Products. The responsible drafting unit of this standard: Beijing Rubber Products Design and Research Institute. The drafting units of this standard include: Beijing Rubber and Plastic Products Factory, 35311 Factory of the General Logistics Department, and Wuxi No. 6 Rubber Factory. The main drafters of this standard include: Song Baoqing, Meng Qi, Shi Chunxi, and Zhu Xiaofeng. The first publication date of this standard is June 27, 1991. 220
Chemical Industry Standard of the People's Republic of China
Part 3: Rubber Blanket for Preshrinking Fabric
Rubber roller-Www.bzxZ.net
Part 3 :rubber blanket for preshrinking fabricHG/T2013—2001
Replaces HG/T2013—1991
This standard specifies the product classification, requirements, test methods, inspection rules, packaging, marking, storage, transportation, etc. of rubber blanket for preshrinking fabric (hereinafter referred to as preshrinking blanket).
This standard applies to preshrinking blankets used for preshrinking fabric in textile printing and dyeing industries. 2 Cited standards
The clauses contained in the following standards constitute the clauses of this standard through reference in this standard. At the time of publication of this standard, all versions are: valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T528-1998 Determination of tensile stress-strain properties of vulcanized rubber and thermoplastic rubber (eqvISO37:1994) GB/T531-1999 Rubber pocket hardness test method for indentation hardness (idtISO7619:1986) GB/T1681—1991 Determination of rebound resilience of vulcanized rubber GB/T2941-1991 Standard temperature, humidity and time for environmental conditioning and testing of rubber specimens (eqvISO471 :1983) GB/T3512--1983 (1989) Rubber hot air aging test method (negISO188:1976) GB/T13934-1992 Determination of flex cracking of vulcanized rubber 3 Product classification
3.1 Product classification
Preshrink blankets are divided into the following two categories according to thickness:
Class A ordinary preshrink blankets, thickness of 25~～40mm; Class B thickened preshrink blankets, thickness of ≥40~70mm. 3.2 Product marking
3.2.1 Marking method
The product should be marked in the following order: type, hardness, thickness. 3.2.2 Marking example
The ordinary preshrink blanket with a hardness of 40 degrees and a thickness of 25mm is marked as: A-40-25.mm. 4 Requirements
4.1 Specifications, dimensions and tolerances of preshrink blankets
Specifications, dimensions and tolerances of preshrink blankets shall be as specified in Table 1. Approved by the State Economic and Trade Commission on January 24, 2002 and implemented on July 1, 2002
Product name
Ordinary preshrink blankets
Thickened preshrink blankets
HG/T 2013-2001
Table 1 Specifications, dimensions and tolerances of preshrink blankets
Inner diameter
Basic dimensions
Limit deviation
Note: The specific requirements for product specifications and dimensions shall be agreed upon by the supply and demand parties. 4.2 Physical properties of rubber for preshrink blankets
Basic size
25～30
>30～40
>40~50
>50～70
The physical properties of rubber for preshrink blankets shall comply with the requirements of Table 2. Table 2 Physical properties of rubber compound
Hardness (Shore A type), degree
Tensile strength, MPa
Elongation at break, %
Resilience, %
Flex cracking, 10,000 times
Hot air aging
(100℃, 24h）)
4.3 Appearance quality of preshrink blanket
Change rate of tensile strength, %
Change rate of elongation at break, %
Limit deviation
Basic size
1 100~1 300
1 200~1 400
1 400~1 800
1 600~~2 000
40, no cracking
-5～10
10～15
The surface of the preshrink blanket should be flat and smooth, and no delamination, mechanical damage, impurities and bubbles visible to the naked eye are allowed. 5 Test method
5.1 The appearance quality of the preshrink blanket shall be visually inspected. 5.2 The specifications and dimensions of the preshrink blanket shall be measured with a tape measure, a steel ruler or corresponding measuring tools. Note: Inner diameter outer circumference-(2×thickness)
The test conditions of the rubber sample shall be carried out in accordance with the provisions of GB/T2941. 5.3
The hardness shall be determined in accordance with the provisions of GB/T531. 5.4
The tensile strength and elongation at break shall be determined in accordance with the provisions of GB/T528. 5.5
The resilience shall be determined in accordance with the provisions of GB/T 1681. The hot air aging test shall be carried out in accordance with the provisions of GB/T3512.
Limit Deviation
Flex cracking shall be determined in accordance with the provisions of GB/T13934, using long strip specimens with semicircular cross-sections and molded grooves. Acceptance Rules
Batching and Sampling
The rubber used in each preshrink blanket is considered as a batch, and sufficient specimens are taken from each batch for physical and mechanical property tests. 6.2 Inspection Classification
6.2.1 Factory Inspection
The inspection items are specification dimensions, surface quality and all physical properties listed in Table 2. Specification dimensions, surface quality and hardness shall be inspected item by item. 222
HG/T 2013—2001
The physical properties of rubber used in preshrink blankets shall be inspected in batches. 6.2.2 Type Inspection
6.2.2.1 Preshrink blankets shall be subjected to type inspection in one of the following situations. Trial Forming Appraisal of New Products.
There are major changes in the production structure, design, process, materials, production equipment, management, etc. b.
Resumption of production after production change, factory change, or long-term shutdown (more than 6 months). d.
Contract provisions.
The factory inspection results are significantly different from the last type test. e.
Arbitration inspection or the national quality supervision and inspection agency has put forward the requirement for conducting this test. f.
6.2.2.2 The inspection items are all the requirements listed in Chapter 4 of this standard. 6.3 Judgment rules
If any one of the specifications, dimensions, surface quality, and hardness is unqualified, the preshrink blanket is a defective product. If any of the other properties does not meet the requirements, double the sample should be taken for retest of the item. If the retest results still do not meet the requirements, the batch of products is a defective product.
7 Packaging, marking, storage, transportation
7.1 Each pre-shrink blanket is packed with opaque paper or plastic film. If other packaging materials are used, it shall be agreed upon by both the supplier and the buyer. 7.2 Each package shall have a product certificate, which shall include the product name, product mark, trademark, manufacturer name, factory address, production date and implementation standard number, etc.
7.3 Each pre-shrink blanket shall be packed in a wooden box or iron box and shall be marked with the following marks: the sending unit, the manufacturing unit, the product name, product specifications, and the manufacturing date. When transporting at this port, it can be decided according to the specific situation. 7.4 Pre-shrink blankets transported to severely cold areas below -10℃ must take appropriate insulation measures. 7.5 Pre-shrink blankets should be stored in a warehouse with a room temperature of 0-40℃ and a relative humidity of 50%-80%. 7.6 During transportation and storage, pre-shrink blankets should be kept away from direct sunlight, rain and snow; and are prohibited from contact with acids, alkalis, oils and other substances that affect the quality of rubber. It should be kept 3m away from heat sources.
7.7 When storing, pre-shrink blankets should be taken out of the packaging box and stacked upright. 7.8 Under the above conditions, the performance of the product should meet the requirements of this standard within nine months from the date of manufacture. 7.9 The use and maintenance of the preshrink blanket shall comply with the provisions of Appendix A. 223
HG/T2013--2001
Appendix A
(Suggested Appendix)
Use and Maintenance of Fabric Preshrink Rubber Blanket
A1 After the preshrink blanket is installed, it needs to be preheated for 5 minutes before use. The steam gauge pressure of the heating roller should not be too high, generally 0.25~~0.40MPa is appropriate. A2
A3 When slight cracks appear on the surface of the preshrink blanket during use, it should be polished immediately before use. After trimming, it is necessary to pay attention to the precise specifications to avoid uneven pressure.
A4 During use, the preshrink blanket should not be over-pressurized. After use, it should be decompressed, relaxed and cooled to room temperature, and the pressure roller should leave the preshrink blanket.
A5 When using the preshrink blanket, there must be an internal and external spray cooling device to control the internal and external surface temperature of the preshrink blanket within the use range to extend its service life.
A6 Each time the machine is started, the pressure should be gradually and evenly increased; when the machine is stopped, the preshrink blanket shall not be subjected to mechanical pressure and tension. 224
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