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PVA alloy capable of being processed with thermoplasticity method and manufacture technology thereof

A thermoplastic processing and polyvinyl alcohol technology, applied in the field of polyvinyl alcohol alloys, can solve the problems of inability to meet the requirements of high-barrier packaging, high equipment power consumption and high melting point

Inactive Publication Date: 2010-09-29
刘建林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the effect of intermolecular hydrogen bonds, it has high density and excellent gas barrier properties, but its melting point is as high as 220-240°C, and its decomposition temperature is low. It begins to etherify at 160°C and decomposes at 200°C, making it unsuitable for thermoplastic processing.
In addition, although plasticizers can be used to plasticize it before thermoplastic processing, due to its poor thermal stability and poor processing fluidity, PVA will be thermally decomposed, so the color of the processed product will turn yellow. , and bring a pungent smell after the resin is decomposed. Due to its poor processing fluidity, the power consumption of the equipment required for processing is extremely high, so it cannot meet the social requirements for high-barrier packaging.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] In this embodiment, the raw materials for configuring the thermoplastically processable polyvinyl alcohol alloy are 70% polyvinyl alcohol (its alcoholysis degree is 99, polymerization degree is 1700, brand name is 1799, and the manufacturer is: Beijing Organic Chemical Factory ), 30% polyamide (nylon 6, commercially available).

[0017] After the above raw materials are fully mixed with a mixer, they are extruded and pelletized by a twin-screw extruder granulator (the processing temperature of each section of the extruder is 170-210°C), and fully dried to obtain a thermoplastic material of the present invention Processed polyvinyl alcohol alloy.

[0018] The product of the present invention is blown to a film with a thickness of 15 microns using a single-layer extrusion film blowing machine, and the oxygen transmission rate measured is 0.9cm 3 / m 2 ·24h·0.1MPa.

Embodiment 2

[0020] In this embodiment, the raw materials for configuring the thermoplastically processable polyvinyl alcohol alloy are 65% polyvinyl alcohol (its alcoholysis degree is 99, polymerization degree is 2000, the brand is 2099, and the manufacturer is: Beijing Organic Chemical Factory ), 25% polyamide (nylon 66, commercially available), 10% glycerol and ethanolamine mixture (commercially available).

[0021] The above-mentioned raw materials are fully mixed in a high-mixer, and then extruded and pelletized by a single-screw continuous banburying extrusion granulator (the processing temperature of each section of the extruder is 170-210°C) and is fully dried to obtain the present invention A polyvinyl alcohol alloy that can be thermoplastically processed.

[0022] Take the product of the present invention using a five-layer co-extrusion film blowing machine, use the product of the present invention as the barrier layer, and use polyethylene and maleic anhydride grafted polyethylene ma...

Embodiment 3

[0024] In this embodiment, the raw materials for configuring the thermoplastically processable polyvinyl alcohol alloy are 90% polyvinyl alcohol (its alcoholysis degree is 88, polymerization degree is 1700, brand name is 1788, and the manufacturer is: Beijing Organic Chemical Factory ), 5% polyamide (nylon 11, commercially available), 5% nylon 66 salt, triphenyl phosphite, erucamide, and a mixture of ethylene glycol (commercially available).

[0025] After the above-mentioned raw materials are fully mixed, a single-screw extruder is used for extruding and granulating, (the processing temperature of each section of the extruder is 170-210°C) and fully dried to obtain a thermoplastically processable polyvinyl alcohol of the present invention alloy.

[0026] The product of the present invention is blown by a three-layer co-extrusion blow molding machine, and the product of the present invention is used as the barrier layer. The other two layers are made of polyester (PET). The thickne...

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Abstract

The invention designs a high barrier PVA alloy capable of being processed with a thermoplasticity method. specifically speaking, through various monolayer or multi-layer thermoplasticity processing extrusion processing devices, the alloy is made into various high barrier films containing the alloy comprising a monolayer film, a multi-layer extrusion film, a high temperature retort film, a two-way stretch film and a thermo shrink film, hollow containers comprising a car oil tank, a bottom and a barrel, various tubular products comprising a fuel oil or oil delivery pipe and a gas pipe, various sheets and all high barrier products made from the material. The product made form the material has excellent chemically resistant performance, oil resistance, solvent resistance, transparency, processing stability, high barrier performance for various gases, aroma protection property, tensile strength and elongation at break.

Description

Technical field [0001] The invention designs a polyvinyl alcohol alloy with high barrier and thermoplastic processing. Specifically, this alloy is used to produce various types of single-layer or multi-layer thermoplastic processable extrusion processing equipment to produce various types of high-barrier films containing the alloy, including: single-layer films, multi-layer co-extruded films, High-temperature cooking film, biaxially oriented film, heat shrinkable film; hollow containers, including: automobile fuel tanks, bottles, barrels; various pipes, including: fuel or oil pipes, gas pipes; all kinds of sheets, etc. All made of this material High barrier products. Products made of this material have very good chemical resistance, oil resistance, solvent resistance, transparency, excellent processing stability, barrier properties to various gases, and very good fragrance retention. It also has Very good tensile strength and elongation at break. Background technique [0002] ...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08L77/00
CPCC08K5/0008C08L29/04C08L77/00C08K5/52C08L2666/04
Inventor 刘建林
Owner 刘建林
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