A safety shoe protective toecap made of a long fiber reinforced thermoplastic resin composite material and a preparing method thereof

Abstract

The invention belongs to the technical field of polymer composite materials, and relates to a safety shoe protective toecap made of a long fiber reinforced thermoplastic resin composite material and a preparing method thereof. The protective toecap is prepared from following components by weight: 100 parts of thermostatic resin, 150-300 parts of continuous fiber, 0.1-0.5 part of an antioxidant, 0.2-1.0 part of a coupling agent and 0.2-1.0 part of a lubricant. The protective toecap is prepared by adopting an LFT-D mould pressing one-step production process, can meet requirements of the European standard EN345. Compared with LFT-G and short fiber reinforced thermoplastic resin composite materials, the method reduces the cost, reduces costs of production, transportation and storage of semi-finished products, ensures good impact performance of the protective toecap, and overcomes the disadvantages of steel toecaps, namely poor insulation properties, high specific gravity, low elastic deformation, poor comfortable sensation, and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and relates to a long fiber reinforced thermoplastic resin composite material safety shoe protective toe cap and a preparation method thereof. Background technique [0002] Safety shoes are a general term for safety shoes and protective shoes. They generally refer to footwear that protect feet and legs from foreseeable injuries and are worn in different workplaces. Among them, the European standard EN345 "Special Safety, Protection and Work "Shoes" requires that the protective toe cap of safety shoes can provide impact protection at least 200J energy test and pressure resistance protection at least 15kN pressure test. [0003] The traditional material of the protective toe cap of safety shoes is steel, which is generally cast and formed to resist smashing and protect the toe. However, this kind of safety shoes has the following defects: (1) Because the toe cap is made of steel...

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Problems solved by technology

[0003] The traditional material of the protective toe cap of safety shoes is steel, which is generally cast and formed to resist smashing and protect the toe. However, this kind of safety shoes has the following defects: (1) Because the toe cap is made of steel, the safety shoes can withstand electric shock The ability to wear is poor, that is, the insulation is poor, which limits the scope of use of this kind of shoes; (2) The specific gravity of steel is relatively large, which makes the safety shoes relatively heavy, and you will feel tired when wearing them; (3) The elastic deformation of the steel plate is small, poor comfort

[0004] In order to solve the problem of steel protective toecaps, resin or fiber-reinforced resin composite protective toecaps have been proposed so far, in which long-fiber or short-fiber reinforced thermoplastic resin composites are used to prepare safety shoe protective toecaps, but short-fiber reinforced resin It is difficult for protective toe caps made of composite materials to meet the requirements of European standard EN345, especially for strength and rigidity

Long fibers are mainly divided into two types: LFT-G (long fiber reinforced thermoplastic composite pellets) and LFT-D (direct online long fiber reinforced thermoplastic composites), among which LFT-G is a two-step process, that is, it is first made into pellets , and then made parts by molding or injection molding process, the cost is relatively high, while the fiber length retention rate in parts made by LFT-G injection molding process is relatively short, which will greatly reduce the impact performance of the parts

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