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A kind of lightweight ski helmet material and preparation method thereof

A helmet and lightweight technology, applied in the field of materials, can solve the problems of high shrinkage, unstable size of molded products, low strength of high-density polyethylene materials, etc., to enhance the adhesion of paint films, improve dimensional stability and durability Thermal property, strong adhesion of paint film

Active Publication Date: 2020-10-27
NANJING JULONG SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the high-density polyethylene material is used to replace the existing ABS material to make the helmet, the following problems will occur: 1. The high-density polyethylene material has a high shrinkage rate, which will cause unstable dimensions of the molded product; 2. The high-density polyethylene material has low strength , it is necessary to increase the strength of the material in order to meet the strength requirements of the helmet

Method used

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  • A kind of lightweight ski helmet material and preparation method thereof
  • A kind of lightweight ski helmet material and preparation method thereof
  • A kind of lightweight ski helmet material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A preparation method for lightweight ski helmet material, comprising the following steps:

[0035] Step 1: 85 parts of high-density polyethylene with a melt index of 1g / 10min, 5 parts of mPE, 2 parts of ethylene-acrylic acid copolymer, 0.2 part of dicumyl peroxide, and 0.3 part of antioxidant 1010 , 0.5 part of EBS was added to the high-speed mixer according to the parts by weight, and pre-mixed for 1-3 minutes to obtain the mixture;

[0036] Step 2: Add the mixture obtained in Step 1 into the twin-screw extruder through the hopper, and add 10 parts of carbon fibers with a fiber length of 3mm into the extruder through the side feeder, and plasticize through meshing, mixing, extrusion, drawing strips, air-dried, and granulated to obtain high-strength, high-heat-resistant polyethylene composite materials; the temperature of the extruder from the first zone to the head: 160-200°C;

[0037] Step 3: Add the composite material obtained in Step 2 to an injection molding machi...

Embodiment 2

[0039] A preparation method for lightweight ski helmet material, comprising the following steps:

[0040] Step 1: 70 parts of high-density polyethylene with a melt index of 2g / 10min, 7 parts of EVA, 5 parts of chlorinated polyethylene, 0.5 part of tert-butyl hydroperoxide, 0.4 part of antioxidant 168, and 1 part of polyethylene wax Add it into the high-speed mixer according to the parts by weight, and pre-mix for 1-3 minutes to obtain the mixture;

[0041] Step 2: Add the mixture obtained in Step 1 into the twin-screw extruder through the hopper, and add 15 parts of PVA with a fiber length of 1mm into the extruder through the side feeder, and plasticize through meshing, mixing, extrusion, drawing strips, air-dried, and granulated to obtain high-strength, high-heat-resistant polyethylene composite materials; the temperature of the extruder from the first zone to the head: 160-200°C;

[0042] Step 3: Add the composite material obtained in Step 2 to an injection molding machine,...

Embodiment 3

[0044] A preparation method for lightweight ski helmet material, comprising the following steps:

[0045] Step 1: 77 parts of high-density polyethylene with a melt index of 10g / 10min, 10 parts of LLDPE, 1 part of ethylene-acrylic acid copolymer, 0.1 part of dicumyl peroxide, and 0.5 part of antioxidant 1010, Add 0.3 parts of EBS into the high-speed mixer according to the parts by weight, and pre-mix for 1-3 minutes to obtain the mixture;

[0046] Step 2: Add the mixture obtained in Step 1 into the twin-screw extruder through the hopper, and add 12 parts of nylon with a fiber length of 3 mm into the extruder through the side feeder, and plasticize, mix, extrude, and draw strips, air-dried, and granulated to obtain high-strength, high-heat-resistant polyethylene composite materials; the temperature of the extruder from the first zone to the head: 160-200°C;

[0047]Step 3: Add the composite material obtained in Step 2 to an injection molding machine, and obtain a lightweight sk...

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Abstract

The invention relates to a helmet material and a preparation method thereof and particularly relates to a light ski helmet material and a preparation method thereof. The light ski helmet material comprises, by weight, 70 to 85 parts of high density polyethylene, 10 to 20 parts of reinforced fibers, 3 to 10 parts of a toughening agent, 1 to 5 parts of an accelerator, 0.1 to 0.5 parts of a curing agent, 0.2 to 0.5 parts of an antioxidant and 0.3 to 1 part of a lubricant. Through use of the high-density polyethylene base with lower density as a base and high strength organic fibers as reinforcingbodies, the light, high strength, high toughness and high cold resistance polyethylene composite material is obtained. Through the curing agent, the heat resistance of the material is further improved and the light ski helmet material used at high and low temperatures for a long time is prepared.

Description

technical field [0001] The invention relates to a helmet material and a preparation method thereof, in particular to a lightweight ski helmet material and a preparation method thereof, belonging to the field of material technology. Background technique [0002] A ski helmet generally consists of: a shell, a liner, a regulator, a fixing device, a buckle (Buckle) and a goggle buckle. The main function of the helmet is to ensure the safety of the user's head in the event of an accident during skiing. On the other hand, skiing pays attention to speed and skill, and the helmet also requires both lightweight and aerodynamic performance. Therefore, the weight of the ski helmet itself is also an important determinant when choosing a ski helmet. For the same size ski helmet, try to choose the weight Light, heavy helmets can affect ride quality when worn for extended periods of time. [0003] Most of the ski helmet shells currently on the market are made of ABS (a type of engineerin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L23/08C08L23/28C08L77/00C08L67/02C08L51/06C08L29/04C08K13/04C08K7/06C08K5/14C08K5/134C08K5/20C08K5/526
CPCC08L23/06C08L2201/08C08L2205/025C08L2205/035C08L2205/16C08L2207/062C08L2312/00C08L23/0869C08K13/04C08K7/06C08K5/14C08K5/1345C08K5/20C08L23/0853C08L23/286C08L29/04C08K5/526C08L23/0815C08L77/00C08L51/06C08L67/02
Inventor 王滨刘曙阳蒋顶军董侠
Owner NANJING JULONG SCI&TECH CO LTD
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