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Foam composite material for bicycle safety helmet and preparation method thereof

A composite material and bicycle technology, applied in helmets, applications, helmet covers, etc., can solve problems such as precipitation and leakage, and achieve the effects of preventing puncture, simple preparation and processing, and protecting the head.

Active Publication Date: 2020-06-30
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

Due to the special properties of non-Newtonian fluids, there are problems such as precipitation and leakage when used alone. Even if it is made into a gel, there are problems in how to combine well with the existing helmet buffer layer

Method used

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  • Foam composite material for bicycle safety helmet and preparation method thereof
  • Foam composite material for bicycle safety helmet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Add ethyl orthosilicate to the reaction kettle, then add water and ethanol, the mass ratio of ethyl orthosilicate, water, and ethanol is 1:3:5, add hydrofluoric acid while stirring, and adjust the pH of the solution The value is 3, stirred for 1 hour until the tetraethyl orthosilicate is completely hydrolyzed, filtered through filter paper, naturally filtered for 30 minutes, and most of the water was filtered out to obtain a wet gel, and then polyether 330 and gum arabic powder were added to obtain a premix; Gel, polyether, and gum arabic powder are mixed in a mass ratio of 10:20:10;

[0031] (2) Weigh polyether 330, toluene diisocyanate, premix, catalyst stannous octoate, and surfactant silicone oil according to mass ratio: 50:30:50:0.1:0.5; weigh polyether 330 and toluene diisocyanate Pre-react for 30 minutes to form an oligomer with isocyanate at the end; then add the premix, catalyst and surfactant and stir evenly, then quickly add a plate-shaped mold with a thi...

Embodiment 2

[0034] (1) Add ethyl orthosilicate to the reaction kettle, then add water and ethanol, the mass ratio of ethyl orthosilicate, water, and ethanol is 1:4:3, add hydrofluoric acid while stirring, and adjust the pH of the solution The value is 3, stirred for 1 hour until the tetraethyl orthosilicate is completely hydrolyzed, filtered through filter paper, naturally filtered for 30 minutes, and most of the water was filtered out to obtain a wet gel, and then polyether 330 and gum arabic powder were added to obtain a premix; Gel, polyether, and gum arabic powder are mixed in a mass ratio of 10:20:5;

[0035](2) Polyether 330, toluene diisocyanate, premix, catalyst dibutyltin dilaurate, and surfactant silicone oil are weighed according to the mass ratio of materials: 50:35:60:0.2:1; Polyether 330 and Toluene diisocyanate is pre-reacted for 45 minutes to form an oligomer with isocyanate at the end; then add the premix, catalyst and surfactant and stir evenly, then quickly add a plate-...

Embodiment 3

[0038] (1) Add ethyl orthosilicate to the reaction kettle, then add water and ethanol, the mass ratio of ethyl orthosilicate, water, and ethanol is 1:5:5, add hydrofluoric acid while stirring, and adjust the pH of the solution The value is 3, stir for 2 hours until the tetraethyl orthosilicate is completely hydrolyzed, filter paper, filter naturally for 30 minutes, filter out most of the water, and obtain a wet gel, then add polyether 330 and gum arabic powder to obtain a premix; wet Gel, polyether, and gum arabic powder are mixed in a mass ratio of 15:25:10;

[0039] (2) Weigh polyether 330, isophorone diisocyanate, premix, catalyst stannous octoate, and surfactant silicone oil in a mass ratio of 50:30:55:0.1:0.5 to weigh materials; polyether 330 Pre-react with isophorone diisocyanate for 30 minutes to form an oligomer with isocyanate at the end; then add the premix, catalyst and surfactant and stir evenly, then quickly add a plate-shaped mold with a thickness of 10mm to foam...

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Abstract

The invention belongs to the field of helmet functional materials, and particularly relates to a foaming composite material for a bicycle safety helmet, and a preparation method thereof. The preparation method comprises: dispersing a premix formed by a silicon dioxide wet gel, polyether and Arabic gum powder into a pre-reacted polyurethane oligomer; further carrying out a foaming reaction on polyether and the oligomer while uniformly dispersing a wet gel and Arabic gum in polyurethane foam; and immersing polyethylene glycol 600, and adsorbing to form the uniform non-Newtonian fluid from silica, Arabic gum, polyethylene glycol 600 in polyurethane foam. According to the invention, the foaming material generally has good softness and good buffer property during the use, so that the helmet isendowed with good comfort; and when the helmet is subjected to violent collision, the non-Newtonian fluid formed by silicon dioxide, Arabic gum and polyethylene glycol 600 in the composite foaming material is rapidly gathered and becomes hard from soft due to rapid impact, so that the helmet is not prone to being broken and pierced, and the head is protected against injuries.

Description

technical field [0001] The invention belongs to the field of helmet functional materials, and in particular relates to a foaming composite material for a bicycle safety helmet and a preparation method thereof. Background technique [0002] The helmet is a head protection device mainly made of plastic, which is mainly composed of three parts: the shell, the lining and the suspension device. Helmets are widely used in the construction industry, mining and excavation fields, and sports fields. Especially in the field of cycling, such as bicycle riding, the helmet is required to be light and hard. Both the shell and the cushioning layer are required to protect the head, but also need to feel light and comfortable. At present, the shell materials of helmets are generally divided into ABS engineering plastics, PC+ABS composite materials, glass fiber reinforced plastics, carbon fibers, etc. The materials are required to have excellent heat and weather resistance, excellent stabil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/08C08L75/04C08L5/00C08L71/02C08K3/36C08G18/75C08G18/76C08G18/10C08G18/48A42B3/12C08G101/00
CPCA42B3/121A42B3/125C08G18/10C08G18/48C08G18/755C08G18/7621C08J9/0061C08J9/0066C08J2375/04C08J2405/00C08J2471/02C08G2110/0083
Inventor 张道增
Owner 浙江远景体育用品股份有限公司
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