A kind of fiber reinforced motorcycle helmet composite plastic and its preparation method

A composite plastic, fiber-reinforced technology, applied in fiber raw materials, fiber raw material processing, plant fibers, etc., can solve the problems of insufficient impact resistance, low strength, etc., and achieve low cost, simple preparation process, and extensive large-scale promotion and production value Effect

Active Publication Date: 2020-09-01
浙江远景体育用品股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defect that the current motorcycle helmet shell material adopts ABS\polycarbonate system with low strength and insufficient impact resistance, the present invention proposes a fiber-reinforced motorcycle helmet composite plastic, which is significantly different from the existing fiber-reinforced plastic in that: the present invention Endow the hemp fiber with microporosity, and wrap the thermosetting resin firmly on the hemp fiber. The fiber is easy to disperse in the ABS\polycarbonate system, and the fiber maintains loose micropores, so that it can be used for plastic shells to improve impact resistance and effectively increase Elasticity of the outer shell increases cushioning properties

Method used

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  • A kind of fiber reinforced motorcycle helmet composite plastic and its preparation method
  • A kind of fiber reinforced motorcycle helmet composite plastic and its preparation method
  • A kind of fiber reinforced motorcycle helmet composite plastic and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035](1) The hemp fiber is cut into fibers of 2-3mm, fully softened by immersion in hot water, then drained, placed in the reaction vessel of the steam explosion device, heated to when the pressure in the reaction vessel rose to 1.0MPa, Hold the pressure for 5 minutes, then quickly release the pressure to loosen the hemp fiber and form micropores, disperse azodicarbonamide and saturated sodium hydroxide lye according to the mass ratio of 1:5 to obtain a foaming liquid, and spray the foaming liquid on the blasting surface For the treated hemp fiber, the amount of foaming solution sprayed is controlled at 5% of the hemp fiber mass, so that the foaming solution fully penetrates the hemp fiber for 1 hour; then dry at 100° C. to obtain pretreated hemp fiber;

[0036] (2) Prepare Miki SM609-50 liquid epoxy resin, pentaerythritol, toluene diisocyanate, and curing agent dicyandiamide in a mass ratio of 40:5:1:3 to prepare a colloidal liquid; add pretreated hemp fiber into a high-speed...

Embodiment 2

[0040] (1) The hemp fiber is cut into fibers of 2-3mm, fully softened by immersion in hot water, then drained, placed in the reaction vessel of the steam explosion device, heated to when the pressure in the reaction vessel rose to 1.0MPa, Hold the pressure for 5 minutes, then quickly release the pressure to loosen the hemp fiber and form micropores, disperse azodicarbonamide and saturated sodium hydroxide lye according to the mass ratio of 1:5 to obtain a foaming liquid, and spray the foaming liquid on the blasting surface For the treated hemp fiber, the amount of foaming solution sprayed is controlled at 3% of the hemp fiber mass, so that the foaming solution fully penetrates the hemp fiber for 1 hour; then dry at 80° C. to obtain pretreated hemp fiber;

[0041] (2) Prepare Miki SM609-50 liquid epoxy resin, pentaerythritol, toluene diisocyanate, and curing agent dicyandiamide in a mass ratio of 40:2:1:3 to prepare a colloidal liquid; add the pretreated hemp fiber into a high-s...

Embodiment 3

[0045] (1) The hemp fiber is cut into fibers of 2-3mm, fully softened by immersion in hot water, then drained, placed in the reaction vessel of the steam explosion device, heated to when the pressure in the reaction vessel rose to 1.5MPa, Hold the pressure for 5 minutes, then quickly release the pressure to loosen the hemp fiber and form micropores, disperse azodicarbonamide and saturated sodium hydroxide lye according to the mass ratio of 1:5 to obtain a foaming liquid, and spray the foaming liquid on the blasting surface For the treated hemp fiber, the spraying amount of the foaming solution is controlled at 3-5% of the quality of the hemp fiber, so that the foaming solution fully penetrates the hemp fiber for 1 hour; then dry at 100° C. to obtain the pretreated hemp fiber;

[0046] (2) Miki SM609-50 liquid epoxy resin, pentaerythritol, toluene diisocyanate, and curing agent dicyandiamide are prepared into a gelatinous liquid with a mass ratio of 50:5:2:3; the pretreated hemp...

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Abstract

The invention relates to the field of helmet materials, in particular to a fiber-reinforced motorcycle helmet composite plastic and a preparation method. Jute fibers are loosened through steam explosion treatment, the loosened jute fibers are provided with good micropores, a foaming agent is arranged in the micropores of the jute fibers, then the jute fibers are coated with thermosetting epoxy resin, during heat treatment of a two-stage fluidized bed, gas is generated by the internally-arranged foaming agent, the micropores are reserved, meanwhile, the epoxy resin is heated and cured to form firm coating coated fibers, and the obtained fibers are the loosened jute fibers with the micropores; and after the jute fibers are coated with the thermosetting resin, compatibility and dispersion ina fiber polycarbonate / ABS system are facilitated, the loosened jute fibers are protected by the thermosetting resin, the micropores of the jute fibers cannot be blocked during later pelletizing, and the good micropores of the obtained composite plastic are reserved in a finished helmet outer shell. The helmet outer shell has excellent low-weight and buffering characteristics while the strength ofthe helmet outer shell is achieved.

Description

Technical field: [0001] The invention relates to the field of helmet materials, in particular to a fiber-reinforced motorcycle helmet composite plastic and a preparation method. Background technique: [0002] The helmet is a head protection device with plastic as the main material, which is mainly composed of three parts: the shell, the buffer layer lining and the suspension device. The shell is generally made of hard plastics such as ABS or PC with good wear resistance and compression resistance, and carbon fiber composite materials or metal materials are also used. This layer requires high hardness, high rigidity, and wear resistance, which helps to resist the penetration of sharp objects. At present, most of the helmet shell materials are reinforced, such as carbon fiber and glass fiber reinforced plastics. However, when used as a helmet shell material, in addition to reinforcement, it is more important to realize the reinforcement while ensuring the good cushioning and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F41H1/04D21B1/06D21B1/36C08L69/00C08L55/02C08L83/04C08L23/06C08L1/02C08K3/22C08K5/20C08J5/06D06M15/55D06M101/06
CPCC08J5/06C08J2355/02C08J2369/00C08J2401/02C08J2423/06C08J2455/02C08J2469/00C08J2483/04C08K2003/2224D06M15/55D06M2101/06D21B1/061D21B1/36F41H1/04
Inventor 张道增
Owner 浙江远景体育用品股份有限公司
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