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Barrier layer, multilayer plastic composite tube, and preparation method of composite tube

A barrier layer, composite pipe technology, applied in chemical instruments and methods, hoses, pipes, etc., can solve the problems of easy breeding of harmful microorganisms in the pipe, short service life, rapid oxidation of pipes, etc., to prevent the breeding of harmful microorganisms, application fields Wide range of effects to improve processability

Active Publication Date: 2019-05-07
KANGTAI PLASTIC SCI & TECH GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, plastic pipes are widely used in water supply, oil transportation, floor heating and other fields. Due to the low price, low cost, aging resistance, easy production and processing of general plastics, convenient installation, transportation and maintenance, plastic pipes such as PP-R are installed in places with paint , due to the poor barrier properties of the pipes, the smell of paint enters the pipes and pollutes water quality; during the use of PE oil pipelines, due to poor barriers, oil seeps into the soil and pollutes groundwater sources; During the use of the pipe, the poor oxygen resistance of the pipe will corrode the metal parts and the service life of the pipe system will be short. At present, the cost of ethylene-vinyl alcohol copolymer used in the oxygen barrier layer of the oxygen-resistant floor heating pipe is high; the water supply pipeline will also be due to resistance. Oxygen is poor, resulting in the easy breeding of harmful microorganisms in the pipe, and there are problems of rapid oxidation of the pipe and short service life

Method used

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  • Barrier layer, multilayer plastic composite tube, and preparation method of composite tube
  • Barrier layer, multilayer plastic composite tube, and preparation method of composite tube
  • Barrier layer, multilayer plastic composite tube, and preparation method of composite tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1: PP-R water supply pipe

[0047]Mix the raw materials of the barrier layer evenly; prepare polypropylene grafted maleic anhydride copolymer, add 2% of red masterbatch, stir and mix evenly at room temperature, as a bonding layer; then prepare PP-R resin, 2% of white masterbatch Material, as a pressure-bearing layer; according to the temperature of the first section is 175 ° C, the temperature of the second section is 185 ° C, and the temperature of the third section is 195 ° C to extrude the barrier layer; according to the temperature of the first section is 170 ° C, the temperature of the second section is 185°C, the temperature of the third stage is 190°C, and the temperature of the fourth stage is 200°C to extrude the pressure-bearing layer; the temperature of the first stage is 175°C, the temperature of the second stage is 185°C, and the temperature of the third stage is 195°C Adhesive layer; then the barrier layer, adhesive layer and pressure-bearing layer...

Embodiment 2

[0051] Example 2: PE oil pipe

[0052] Mix the raw materials of the barrier layer evenly; prepare polyethylene grafted maleic anhydride copolymer, add 2% red masterbatch, stir and mix evenly at room temperature, and use it as the bonding layer; then prepare PE resin grade 100 as the pressure-bearing layer; The temperature of the first stage is 175°C, the temperature of the second stage is 185°C, and the temperature of the third stage is 195°C to extrude the barrier layer; the temperature of the first stage is 168°C, the temperature of the second stage is 185°C, and the temperature of the third stage Extrude the pressure-bearing layer at 195°C; extrude the bonding layer according to the temperature of the first stage at 180°C, the temperature of the second stage at 185°C, and the temperature of the third stage at 200°C; then the barrier layer, bonding layer and bearing The laminated layer is co-extruded at the machine head. During co-extrusion, the temperature of the first stag...

Embodiment 3

[0054] Example 3: PE-RT oxygen barrier tube

[0055] Mix the raw materials of the barrier layer evenly; prepare heat-resistant polyethylene grafted maleic anhydride copolymer, add 2% red masterbatch, stir and mix evenly at room temperature, and use it as a bonding layer; then prepare PE-RT resin as a pressure-bearing layer; extrude the barrier layer according to the temperature of the first stage at 175°C, the temperature of the second stage at 185°C, and the temperature of the third stage at 195°C; The temperature of the first stage is 190°C, the temperature of the fourth stage is 185°C, and the pressure-bearing layer is extruded; the temperature of the first stage is 180°C, the temperature of the second stage is 185°C, and the temperature of the third stage is 190°C to extrude the bonding layer; Then the barrier layer, the adhesive layer and the pressure-bearing layer are co-extruded at the head. Pull at a pulling speed of 12m / min, then cut and cool to room temperature to o...

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Abstract

The invention discloses a barrier layer. The barrier layer comprises, by weight, 100 parts of polyvinyl alcohol, 0.5-50 parts of an ethylene-vinyl alcohol copolymer, 0.5-25 parts of an ethylene-vinylacetate copolymer, 0.1-2 parts of glycerol, 0-8 parts of a calcium-zinc stabilizer, 0.5-30 parts of nano-glass fiber master batches, 0.5-35 parts of polyethylene and 0.5-10 parts of a maleic anhydridegrafted copolymer. The barrier layer adopts the polyvinyl alcohol as a main component, the ethylene-vinyl alcohol polymer, and the ethylene-vinyl acetate copolymer and the nano-glass fiber master batches are added, and all above components interact to improve the processing performances, the barrier property and the flexibility of the barrier layer, so the barrier property of the barrier layer ofthe present invention is 3-10 times higher than that of a single polyvinyl alcohol barrier layer.

Description

technical field [0001] The invention belongs to the technical field of pipes, and in particular relates to a multilayer plastic composite pipe with a barrier function. Background technique [0002] At present, plastic pipes are widely used in water supply, oil transportation, floor heating and other fields. Due to the low price, low cost, aging resistance, easy production and processing of general plastics, convenient installation, transportation and maintenance, plastic pipes such as PP-R are installed in places with paint , due to the poor barrier properties of the pipes, the smell of the paint enters the pipes and pollutes the water quality; during the use of PE oil pipelines, the poor barrier will also cause oil to penetrate into the soil and pollute the groundwater source; During the use of the pipe, the poor oxygen resistance of the pipe will corrode the metal parts and the service life of the pipe system will be short. At present, the cost of ethylene-vinyl alcohol co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L23/08C08L23/06C08L51/00C08K7/14C08K5/053B32B27/30B32B27/18B32B27/08B32B27/32B32B1/08
CPCC08L29/04C08L2205/025C08L2205/035C08K5/053C08K5/098C08K7/14F16L11/12B32B27/306B32B2307/306B32B2307/7265B32B27/08B32B2250/24B32B2262/101B32B7/12B32B2307/732B32B2307/7244B32B2270/00B32B2250/05B32B2307/546B32B2597/00B32B27/18B32B2307/5825B32B2250/03B32B1/08B32B27/32B32B27/24C08K13/04C08L23/04C08L23/26C08L31/04
Inventor 张双全郝洪波张文霖林辉辉王琪李莉聂敏
Owner KANGTAI PLASTIC SCI & TECH GRP