HG/T 2818-1996 Lightweight conveyor belt HG/T2818-1996 Standard download decompression password: www.bzxz.net

HG/T2818--1996bZxz.net
The number of domestic light conveyor belt manufacturers is increasing. The formulation of this standard provides a unified technical basis for the entire industry for light belts with different covering layers and different core materials.
The technical content of fabric core rubber covering layer (including rubber plastic type) light conveyor belts in this standard is equivalent to the Japanese Industrial Standard JISK6325-1977 (86) "Light Conveyor Belts". Plastic type polyvinyl chloride and polyurethane light conveyor belts are equivalent to the 1996 draft international standard ISO/DIS15147 (1996) "Width and length tolerance of cut light conveyor belts", and also refer to ISO/TC41/SC3N807 "Determination method of resistance of light conveyor belts". The test methods such as conductivity are implemented in accordance with the relevant national standards that have been issued. This standard is proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Qingdao Rubber Industry Research Institute. The drafting units of this standard are: Shenyang Changqiao Adhesive Belt Co., Ltd. and Jiangyin Leather General Factory. The main drafters of this standard are: Yang Li, Zhou Ming, Zhuang Yan, Jin Gang and Song Yan. 383
1 Scope
Chemical Industry Standard of the People's Republic of China
Light Conveyor Belt
HG/T 2818-1996
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of light conveyor belts. This standard is applicable to light conveyor belts for portable conveyors in the textile, light industry, food, electronics and other industries (hereinafter referred to as light belts). 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T528-1992 Determination of tensile properties of vulcanized rubber and thermoplastic rubber GB1689-1982 (1989) Determination of wear resistance of vulcanized rubber (using Akron abrasion machine) GB/T3512-1983 (1989) Rubber hot air aging test method GB3684-1983 Specification and test method for conductivity of conveyor belts (neqISO284:1982) GB/T3690-1994 Determination of tensile strength and elongation of fabric core conveyor belts (eqvISO283:1990) GB/T4490-1994 Conveyor belt dimensions (eqvISO251:1987 and ISO5831990) GB5752-1992 Conveyor belt marking (neqISO433:1991) GB/T6757-1986 General rules for storage and handling of conveyor belts (eqvISO5285:1978) GB/T6759--1986 Test method for interlayer adhesion strength of conveyor belts HG/T2410--1992 Conveyor belt sampling
3 Product classification
3.1 Structural form
The core of a light belt is made of fabrics such as cotton, nylon, and polyester. The core may or may not have a covering layer. The covering layer types are divided into rubber type (including rubber-plastic type) and plastic type (referring to the type with plastics such as polyvinyl chloride and polyurethane as the covering layer). The surface of the light belt can be smooth, or it can have various patterns of deep and shallow patterns or transverse strips, partitions and corrugated ribs, and the transmission surface can also have longitudinal positioning strips. Light belts can be hemmed or cut.
3.2 Specifications
The specifications of light belts are distinguished by full-thickness tensile strength, width and total thickness. 3.2.1 The specification series of the longitudinal full-thickness tensile strength of the belt is shown in Table 5, arranged according to the R10 priority number system. 3.2.2 The width specifications of light belts with hemming shall be implemented in accordance with the provisions of GB/T4490. 3.2.3 The total thickness specifications of light belts shall be implemented in accordance with the provisions of Table 1. Table 1
Total thickness
Note: Specifications beyond the R10 series in the table can be agreed upon by the supply and demand parties. Approved by the Ministry of Chemical Industry of the People's Republic of China on June 28, 1996 384
Implementation on January 1, 1997
3.2.4 Specification Marking
The composition and arrangement of the specification marking of light belts are as follows: HG/T 2818—1996
a) Specification of longitudinal full-thickness tensile strength, in Newton per millimeter (N/mm); b) Letter Q for light belts;
c) Year and month of production, represented by two digits respectively; d) Letter R for rubber covering layer (letter P for plastic covering layer); e) Nominal width of belt, in millimeters (mm); f) Material and number of layers of skeleton layer, where the material representation symbol shall be in accordance with GB5752. g) Belt length, in meters (m).
Marking example:
4 Technical requirements
4.1 Appearance quality
4.1.1 Covering layer
PN2—20
Inner circumference of annular belt
Material and number of skeleton layers
Belt width specification
-Rubber covering layer
Year and month of production
Light belt
Longitudinal full thickness tensile strength specification
The surface of the light belt shall not have any defects that are harmful to the performance. There shall be no more than 2 bright scars or bubbles with a depth of 0.5mm×length of 20mm×width of 20mm on the surface of each 3m long belt. 4.1.2 Delamination
Delamination is not allowed for light belts.
4.2 Dimensions and dimensional deviations
4.2.1 Total thickness and maximum difference
The total thickness of the light belt shall comply with the provisions of Table 1. The maximum difference in total thickness measured at several points distributed in the transverse direction shall not be greater than 10% of the average value of the total thickness.
4.2.2 Width and limit deviation
When the width of the cut light belt is less than 1m, the cutting width shall increase by 50mm; when the width is greater than 1m, the cutting width shall increase by 100mm. The width limit deviation shall comply with the provisions of Table 2. Table 2
≤200
2006≤600
600
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