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Foaming section bar of multi-point positive feedback springback material with memorability and preparation method thereof

A memory and multi-point technology, applied in applications, shoe soles, clothing, etc., can solve problems such as slippage, secondary shock, and insufficient fatigue life of air cushions, and achieve outstanding pressure resistance and long-term deformation capabilities without deformation in service life Effect

Pending Publication Date: 2018-02-23
上海德亿化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the lightweight of materials in the market is on the rise, and degradable materials are also actively introduced, professional companies and institutions are focusing on the development of materials with high foaming ratio, low cost and high physical property retention, resulting in the expansion of fast-moving products. Apps lack attention to human mechanics, ergonomics and consumer experience
In addition, because the structure of traditional air cushion products is a closed airbag structure, when people step on it, it is easy to slip and cause ankle sprains.
In addition, the fatigue life of the traditional air cushion is not enough, and it will collapse in about one month.
The existing ETPU products also have a closed-cell structure, which also has problems such as slipping and causing ankle sprains. In addition, the purely closed airbag structure is also prone to secondary shocks, which can easily cause fatigue damage to human knees.

Method used

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  • Foaming section bar of multi-point positive feedback springback material with memorability and preparation method thereof
  • Foaming section bar of multi-point positive feedback springback material with memorability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0051] A foamed profile of a memory multi-point positive feedback resilience material, preferably adopting the following formula counted by weight percentage:

[0052] Degradable thermoplastic elastomer: Generally, it is a degradable thermoplastic polymer elastomer with slow crystallization speed and low crystal regularity, such as thermoplastic polyurethane elastomer, low melting point amorphous nylon, etc., and the total addition amount is 70-98 parts;

[0053] Blowing agent: carbon dioxide, nitrogen, n-butane, n-pentane or isopentane, or two or more mixed blowing agents, 0.1-15 parts;

[0054] Nucleating agent: silicon dioxide, talc, modified calcium carbonate, or mixed powder of two or more of the above, 0.05-0.5 parts;

[0055] Functional additives: antioxidant (0-2 parts), ultraviolet absorber (0-0.5 part), light stabilizer (0-0.5 part), hydrolysis-resistant stabilizer (0-1 part), external lubricant and internal lubricant (0-1 part)), crosslinking agent (0-5 part).

[...

Embodiment 1-1

[0067] According to the above-mentioned embodiment 1, a polyether-type thermoplastic polyurethane substrate with a molecular weight Mw of 200K is selected, the hardness is Shore hardness 85A, and the addition ratio is 75 parts. The foaming agent is selected from CO mixed with a mass ratio of 1:1. 2 +N 2 Combination, the addition amount is 1.2 parts, the nucleating agent is 1:1:1 mixed calcium carbonate, silicon dioxide and talc powder, the addition amount is 0.3 parts, and the crosslinking agent is 3 parts. The selected twin-screw extruder has an aspect ratio L / D of 40, the screw heating temperature is 180°C, the inlet pressure of the melt pump is controlled at 80 bar, the process water pressure in the underwater pelletizing chamber is controlled at 12 bar, and the pressure release pressure difference is controlled. (That is, the pressure difference between the pressure of the hot melt extruded through the die and the process water in the underwater pelletizing chamber) 100 ba...

Embodiment 1-2

[0071] According to the above-mentioned embodiment 1, a polyether thermoplastic polyurethane base material with a molecular weight Mw of 150K is selected, the hardness is Shore hardness 70A, the addition ratio is 70 parts, and the blowing agent is CO 2 , the addition amount is 2 parts, the nucleating agent is calcium carbonate, the addition amount is 0.05 parts, and the crosslinking agent is 0.1 parts. The selected twin-screw extruder has an aspect ratio L / D of 32, the screw heating temperature is 160°C, the inlet pressure of the melt pump is controlled at 60 bar, the process water pressure in the underwater pelletizing chamber is controlled at 6 bar, and the pressure release pressure difference is controlled. (That is, the pressure difference between the hot melt extruded through the die and the process water in the underwater pelletizing chamber) 70bar.

[0072] After underwater granulation, expansion, cooling and shaping, the expanded beads with an outer diameter of 5mm and...

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Abstract

The invention relates to a foaming section bar of multi-point positive feedback springback material with memorability and a preparation method thereof. The foaming section bar comprises a structural support which is composed of distributed enclosed air bags, and network pressure releasing structures which are distributed between enclosed air bags and comprise intercommunicated and open air passages that extend to the outside; the formula comprises the following components: 70-98 parts of degradable thermoplastic elastomers, 0.1-15 parts of a foaming agent, 0.05-0.5 parts of a nucleating agent,and 0-10 parts of a functional auxiliary agent. Compared with the prior art, compressive deformation and bounciness of countless enclosed air bags in the foaming section bar product are restrained and concentrated on relatively uniform surfaces by open air passages or capillaries, so that the product has positive multi-point feedback function.

Description

technical field [0001] The invention relates to a multi-profile material and a preparation method thereof, in particular to a foamed profile of a memory multi-point positive feedback rebound material and a preparation method thereof. Background technique [0002] With the development of various aspects of global high-tech materials research and market applications, the rapid development of polymer materials meets the needs of various applications in the market, but the requirements for environmental protection and energy saving have brought new requirements for lightweight and degradable materials. Especially with the development of the modernization process in our Greater China region, this requirement is becoming more and more urgent. At present, most of my country's foaming materials and biodegradable materials with high physical properties and low cost are imported or the technology is unique to foreign companies. Although the lightweight of materials in the market is o...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08L77/02C08L67/02C08L101/16C08K3/36C08K3/34C08K3/26C08J9/12C08J9/14A43B13/04
CPCA43B13/04C08J9/122C08J9/141C08J2203/06C08J2203/14C08J2367/02C08J2375/08C08J2377/02C08K3/34C08K3/36C08K2003/265
Inventor 陈乔健郭杨龙
Owner 上海德亿化工有限公司
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