HG 2401-1992 Mining Boots HG2401-1992 Standard Download Decompression Password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
HG2401-92
Published on October 22, 1992
Implemented on July 1, 1993
Ministry of Chemical Industry of the People's Republic of China
Chemical Industry Standard of the People's Republic of China
1 Subject Content and Scope of Application
HG2401-92
This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage requirements for industrial and mining boots. This standard applies to general labor protection boots made of rubber as the main raw material for industrial and mining enterprises. This standard does not apply to rubber boots with rubber surface for acid resistance, alkali resistance, insulation and other special purposes. 2 Reference standards
GB528 Determination of tensile properties of vulcanized rubber
GB532 Determination of adhesion strength between vulcanized rubber and fabric GB1689 Determination of wear resistance of vulcanized rubber (using Akron abrasion machine) GB/T2941 Standard temperature, humidity and time for environmental conditioning and testing of rubber specimens GB3293 Chinese shoe sizes and shoe planting series
3 Terms or names of various parts of industrial and mining boots
The terms or names of various parts of industrial and mining boots are shown in Figure 1 and Table 1. Approved by the Ministry of Chemical Industry of the People's Republic of China on October 22, 1992, and implemented on July 1, 1993
HG2401-92
Terms or names
Outsole non-contacting part
Outsole non-contacting part
Top line
Boot lining
Insole
Boot heel
4 Technical requirements
HG 2401-92
4.1 Shoe size, model and shoe dimensions shall be in accordance with the provisions of GB3293. The physical and mechanical properties must comply with the provisions of Table 2. 4.2
Tensile strength, MPa
Elongation at break, %
Abrasion, cm2
Adhesion strength, kN/m
The thickness of the upper and outer sole must comply with the provisions of Table 3. 4.3
Thickness, mm
4.4 Appearance quality
Front of boots
Shaft of boots
Ground contact part
Non-ground contact part
4.4.1 All parts must be well adhered. The cumulative area of ​​the inner bottom fabric being hollowed out shall not exceed 600mm2, the cumulative area of ​​the lining being shelled shall not exceed 400mm2, the outer bottom opening depth shall not exceed 3mm, and the heel and outer bottom opening depth shall not exceed 5mm. 4.4.2 The surface of industrial and mining boots shall be basically smooth, bright and free of frost. 4.4.3 There shall be no obvious spots, dirt or other defects that damage the appearance. 4.4.4 There shall be no scars, cracks, sand holes, bubbles, foreign objects or other defects that hinder wearing. 4.4.5 The outer sole and heel shall meet the anti-slip requirements, and the pattern shall be basically clear. 4.4.6 There shall be no holes in the lining cloth (not limited to repaired ones). 4.4.7 The inner sole cloth and inner sole shall not have serious misalignment that affects wearing. 4.4.8 The depth of the bright oil filling system shall not exceed 40mm. 4.4.9 The height difference of the same pair of boots shall not exceed 5mm. 5 Test method
5.1 Rubber physical and mechanical properties test method General requirements shall be implemented in accordance with the provisions of HG/T2198. When sampling directly from the product, the sole part shall be cut longitudinally along the outer sole; the upper part shall be cut from both sides of the boot system. 5.2 The test conditions of rubber samples shall be implemented in accordance with the provisions of GB/T2941. The sample shall be placed at the standard laboratory temperature for no less than 6 hours before testing. 5.3 The tensile properties of vulcanized rubber shall be determined in accordance with the provisions of GB528. The outer sole and the upper performance test shall all be cut with 6mm.
The wear resistance of vulcanized rubber shall be determined in accordance with the provisions of GB1689. When the test piece is not long enough, it can be overlapped along the longitudinal direction of the outer sole. When the outer sole thickness is thin, it can be 2~3mm.
HG2401-92
5.5 The adhesive strength test of the rubber surface shall be carried out in accordance with the provisions of GB532. The sample is taken from the longitudinal direction of the boots. One sample is taken from each side of the boot. The effective width is 10mm and the length is 100~150mm. Cut the sample through to 40~50mm in length along the effective width direction of the sample (i.e. cut the effective test length), and then use a knife to separate the lining cloth and the rubber opening along the effective width of one end of the sample. 5.6 Thickness determination
5.6.1 Determination of the thickness of the outer sole. Peel off the outsole from the test boots, cut off the edge of the outsole to obtain a long enough sole film. The second pattern of the sole film from the front is one thickness measurement position, and the sole of the foot is another thickness measurement position (see Figure 1). Take a point at each of these two positions and use a vernier caliper to measure the thickness. The data obtained are rounded to one decimal place: 5.6.2 Determination of dry surface thickness. Cut the upper from the test boot and peel off the lining to obtain a dry surface film. Cut off the edge of the upper film and divide the upper film into two equal parts in the longitudinal direction of the upper part of the boot. Take any one of the pieces and measure the thickness at 5 points at uniform distances on the vertical section of the two equal parts of the piece. Take the lowest value to obtain the thickness of the upper part of the boot (see Figure 1); take a point from each of the two upper films on the shaft part (see Figure 1) to measure its thickness. Take the lower value to obtain the shaft thickness. When measuring the thickness of the upper and the shaft, remove the lining cloth thickness and measure it accurately to one decimal place.
6 Inspection rules
Appearance inspection is mainly based on visual inspection. The physical and mechanical properties are tested for every 1-2 days of production (the maximum batch shall not exceed 20,000 pairs). One pair of industrial and mining boots can be randomly selected from each batch for physical and mechanical properties test. If the test fails, double the number of boots from the same batch should be selected, and the unqualified items should be retested. If both pairs are qualified, the batch of products will be qualified; if one pair is qualified and the other pair is unqualified, the batch of boots will be treated as unqualified.
7. Marking, packaging, transportation, storage
7.1 Industrial and mining boots must be marked with the following items:
b. Size specification;
c. Manufacturing unit;
d. Year and month of manufacturing;
Trademark.
7.2 The packing box must indicate the following items:
Manufacturer name:
Product name;
Product standard number;
Product specification quantity;
Trademark and trademark name;
Product grade;
Year and month of production;
Total weight;
Dimensions and volume.
7.3 Mining boots must be covered when transported, and must not be placed together with oil, acid, alkali or other corrosive substances. 7.4 Mining boots should be placed on a shelf when stored, more than 20cm from the ground and wall, and 1m away from all heat sources. It is strictly forbidden to be affected by organic substances and corrosive substances, and should be kept away from direct sunlight. They should be placed in a dry and ventilated room. It is strictly forbidden to place them in the open air. 7.5 The manufacturer should ensure that the product meets this standard within one year from the date of production in the original packaging. Additional Notes:
HG2401—92
This standard was 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 the Shanghai Rubber Shoes Research Institute, and was drafted by Beijing Rubber Factory No. 5. The main drafter of this standard is Wang Jianlong.
This standard adopts the Japanese Industrial Standard JISS5005--86 "Long Boots"
Chemical Industry Standard of the People's Republic of China
HG2401—92||tt ||Chemical Industry Standards Department
(Standardization Research Institute of the Ministry of Chemical Industry)
Postal code: 100013
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Format 880×12301/16 Printing sheet 6 Words 8000 First printing in March 1993
First edition in March 1993
Print count 1-500
2401-92
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