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Nano modified halogen-free flame-proof environmental protection heat-shrinkable material and preparation method thereof

A nano-modification and heat-shrinking technology, which is applied in the field of materials, can solve the problems of inability to produce high-performance heat-shrinkable tubes, decrease in mechanical properties and processing properties, and increase in product waste and defective rate, so as to reduce casualties and property losses , Improved dimensional stability and improved processing performance

Active Publication Date: 2007-02-28
广州凯恒科塑有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will lead to a decline in the mechanical properties and processing properties of the base material, making it impossible to produce high-performance heat-shrinkable tubes, increasing the waste rate of products, demanding equipment, and high production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) at first with ethylene-vinyl acetate copolymer (EVA) 10kg (the content of vinyl acetate accounts for 40% weight, melt index is 3g / 10min), maleic anhydride copolymerization modified ethylene-acrylate copolymer 10kg ( The copolymer content accounts for 5.0% by weight, and the melt index is 5.0g / 10min), organic montmorillonite 10kg (organic modifier is an organic amine salt) is added in the high-speed mixer and stirred at high speed for 3 to 5 minutes, and the mixed material is used The twin-screw extruder extrudes, wire-draws, air-cools, and pelletizes in the range of 100-160°C.

[0029] (2) 15kg of pellets made in the first step, 85kg of ethylene-vinyl acetate copolymer (EVA) (the content of vinyl acetate accounts for 20% by weight, and the melt index is 6g / 10min), maleic anhydride copolymerized Modified ethylene-acrylate copolymer 5kg (the copolymer content accounts for 5.0% by weight, and the melt index is 5.0g / 10min), polydimethylsiloxane 10kg, antioxidant four [b...

Embodiment 2

[0034] (1) at first ethylene-vinyl acetate copolymer (EVA) 10kg (the content of vinyl acetate accounts for 28% by weight, melt index is 3g / 10min), maleic anhydride copolymerization modified ethylene-vinyl acetate copolymer 10kg (the copolymer content accounts for 15.0% by weight, and the melt index is 15.0g / 10min), organic montmorillonite 10kg (organic modifier is alkyl quaternary ammonium salt) adds high-speed stirring in high-speed mixer 3~5 minutes, will mix well The raw material is extruded, wire-drawn, air-cooled and pelletized with a twin-screw extruder at 100-160°C.

[0035] (2) 30kg of pellets made in the first step, 80kg of ethylene-vinyl acetate copolymer (EVA) (the content of vinyl acetate accounts for 28% by weight, and the melt index is 3g / 10min), polydimethyl Siloxane 5kg, antioxidant β-(4-hydroxy-3,5-di-tert-butylphenyl) n-octadecyl propionate (antioxidant 1076) 0.5kg, thiodipropionic acid di(octadecyl) ) ester (DSTP) 1.0kg, surface unactivated superfine magnes...

Embodiment 3

[0040] (1) at first ethylene-vinyl acetate copolymer (EVA) 10kg (the content of vinyl acetate accounts for 40% by weight, melt index is 1g / 10min), maleic anhydride copolymerization modified ethylene-vinyl acetate copolymer 10kg (the copolymer content accounts for 10.0% by weight, and the melt index is 5.0g / 10min), organic montmorillonite 10kg (organic modifier is alkyl quaternary ammonium salt) adds high-speed stirring in high-speed mixer 3~5 minutes, will mix well The raw material is extruded, wire-drawn, air-cooled and pelletized with a twin-screw extruder at 100-160°C.

[0041] (2) 45kg of pellets made in the first step, 70kg of ethylene-vinyl acetate copolymer (EVA) (the content of vinyl acetate accounts for 28% by weight, and the melt index is 3g / 10min), polydimethyl Siloxane 5kg, antioxidant tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester (antioxidant 1010) 1.5kg, thiodipropionic acid di(deca Eight) ester (DSTP) 1.5kg, superfine mag...

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Abstract

The invention discloses a nanometer modified no-slat inflaming retarding protection thermal pinch material and preparing method, which comprises the following steps: mixing up the material by weight; piling out; pelleting; squeezing pipe; cross bonding; heating; expanding; cooling and forming. The invention has good inflaming retarding effects, which is a kind of environment friend product.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a nano-modified halogen-free flame-retardant and environment-friendly heat-shrinkable material and a preparation method thereof. Background technique [0002] Heat-shrinkable materials, also known as polymer shape memory materials, are intelligent materials that combine polymer materials with radiation processing technology. Ordinary polymer materials usually have a linear structure. After being irradiated by a radioactive source such as an electron accelerator and becoming a network structure, these materials will have a unique "memory effect". The expanded, cooled and shaped materials can shrink and recover after being heated. original shape. Since its development in the middle of the 1950s, heat-shrinkable materials have become important functional materials, widely used in the sealing and anticorrosion of chemical and petroleum pipelines, the ins...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08J3/24C08J3/28C08K9/04B29C47/40B29D23/00C08L83/04C08K3/22C08K5/36
Inventor 胡晖张有勇申景强
Owner 广州凯恒科塑有限公司
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