standards and classification of anti smashing safety shoes

1. Technical requirements

toe safety shoes (boots) were developed in China in the early 1980s. 1t is mainly used to protect the wearer from the injury caused by accidents. 1t is equipped with a protective cap, which can provide the impact protection and pressure resistance protection of the toe cap part. 1n 1983, the national approval (leather safety shoes) (gb4014-83) was issued. 1n 1993, on the basis of the original standard, the former Ministry of labor promulgated the standard of “safety shoes for toe protection” (ld50-94) according to the international standard (1SO / cd8782-1993). At present, according to the different protection levels, the product respectively implements GB 21148-2007 personal protective equipment safety shoes and GB 21147-2007 personal protective equipment protective shoes

toe safety shoes (boots) should meet the following requirements< General technical requirements (1) structure: it is composed of steel cap, insole, upper, eyelet, laces, ear, waist, heel protector, moon shaped heel, waist, back pad, insole, inner (bore) sole, core filler and forefoot (2) insole thickness: the insole thickness (excluding tooth thickness) of direct injection, vulcanization and adhesive is not less than 4mm; The full layer thickness of all rubber and all polymer materials shall not be less than 6 mm, the tooth thickness (pattern) shall not be less than 3 mm, the tooth height of other materials shall not be less tha2.5 mm, and the thickness of any part of the sole without pattern (pattern) shall not be less than 6 mm (3) appearance quality: there shall be no obvious defects such as damaged upper surface, uneven color, heavy stitching, jumper, broken thread, uneven stitching, glue opening, excessive sulfur, insufficient sulfur, sulfur spraying, skew inner head, etc< Safety performance (1) pressure resistance: cut the toe from 30mm behind the inner wrap, and then cut off the upper and sole. 1t is placed on the platform of pressure testing machine with indication error of 1%. Place a high (20 ± 2) Mm (under 250 shoes), (25 ± 2) Mm (more than 250 shoes) diameter (25 ± 2) A cylinder of plasticine. Then (5 ± 2) Mm / min to the required force. After unloading, take out the compressed rubber, measure the height with a dial indicator, and take the value measured at the lowest position as the measured value. The value should meet the requirements (2) impact resistance: put the toe cap with inner wrap and cylindrical rubber mud under the impact machine, fix the inspected toe cap, lift the impact hammer (20kg) to the required height, and then impact the toe cap freely. Take out the rubber putty and measure it with a dial indicator. The value should meet the requirements (3) requirements for pressure resistance and impact resistance of toe cap: the test method is the same as that of toe cap, and the deformation spacing of toe cap should meet the corresponding requirements after the test (4) corrosion resistance requirements of inner wrap: the inner wrap can be corroded due to sweat and moisture, which will affect the quality of shoes. Therefore, the inner head should have corrosion resistance. The requirement is to use two strips of white filter paper (100 m wide and 150 mm long) with one end immersed in 1% NaCl solution and the other end placed above and below the inner head. After 48 hours, remove the filter paper, check the traces of NaCl corrosion on Baotou, and measure the area of each spot. 1t is required that the number of corrosion spots shall not exceed 5 and each spot shall not excee2.5 mm ?.2. Product classification 1. According to the fabric material, it can be divided into: 1 (2) anti smashing safety shoes (boots) with Velour surface (3) suede safety shoes (boots) (4) pig smooth anti smashing safety shoes (boots) (5) white canvas anti smashing safety shoes (boots)< (6) safety shoes with rubber surface

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