Thermoplastically modified high-fluidity polyvinyl alcohol, and thermoplastically modified high-fluidity polyvinyl alcohol casting film material and preparation method thereof

A polyvinyl alcohol and high fluidity technology, applied in the field of high fluidity polyvinyl alcohol cast film material and its preparation, can solve the problems of poor melt flow performance, difficult processing, poor thermoplasticity of polyvinyl alcohol, etc. The effect of improved processability, good melt flow properties, and wider processing window

Inactive Publication Date: 2018-04-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the technical problems to be solved by the present invention is that polyvinyl alcohol has poor thermoplasticity, difficult processing, poor melt flow performance, easy thermal oxidation degradation, difficult preparation of cast film and poor mechanical properties in the prior art. Provide a thermoplastic modified high-fluidity polyvinyl alcohol, its processing temperature is reduced, the window is widened, the thermoplastic processing performance is significantly improved, and it has high melt flow performance, and the prepared cast film material has excellent mechanical properties

Method used

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  • Thermoplastically modified high-fluidity polyvinyl alcohol, and thermoplastically modified high-fluidity polyvinyl alcohol casting film material and preparation method thereof
  • Thermoplastically modified high-fluidity polyvinyl alcohol, and thermoplastically modified high-fluidity polyvinyl alcohol casting film material and preparation method thereof
  • Thermoplastically modified high-fluidity polyvinyl alcohol, and thermoplastically modified high-fluidity polyvinyl alcohol casting film material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Thermoplastic modified polyvinyl alcohol processing technology: First, polyvinyl alcohol (PVA-1, alcoholysis degree 88%, polymerization degree 560, 4% weight percent concentration aqueous solution viscosity 7.8mPa·s) at 70℃, vacuum conditions Drying for 4 hours, vacuum packaging with apertsVS5500 vacuum fresh-keeping machine (Dongguan Yinger Electric Co., Ltd.), spare. Take 90 parts of PVA-1 and 10 parts of glycerin (Chemical Reagent Co., Ltd. of Sinopharm Group), respectively, from the weight loss feeder (Brabender TECHNOLOGIE DSR-18) and constant flow plunger pump (Dongtai Yanshan Instrument Factory, HLB-1008) Introduced into the Thermo SCIENTIFIC HAAKE PolyLab OS twin-screw extruder, the feed rate of polyvinyl alcohol is 0.54 kg / h, the feed rate of glycerin is 0.06 kg / h, the temperature of the extruder 1-9 and the die head The order is 150℃, 160℃, 170℃, 180℃, 180℃, 180℃, 180℃, 180℃, 170℃, 160℃, the screw speed is 200 rpm, the melt temperature is 177~179℃, the melt Th...

Embodiment 2

[0044] Thermoplastic modified polyvinyl alcohol processing technology: First, PVA-1 (PVA-1, alcoholysis degree 88%, polymerization degree 560, 4% weight percent concentration aqueous solution viscosity 7.8mPa·s) at 70℃, Dry for 4 hours under vacuum conditions, vacuum package, and reserve. Take 85 parts of PVA-1 and 15 parts of glycerin, and import them into Thermo SCIENTIFIC HAAKE PolyLab OS twin-screws from the Brabender TECHNOLOGIEDSR-18 and constant flow plunger pump (Dongtai Yanshan Instrument Factory, HLB-1008). In the extruder, the feed rate of polyvinyl alcohol is 0.57 kg / h, the feed rate of glycerol is 0.10 kg / h, the temperature of the extruder 1 to 9 and the die head are 150℃, 160℃, 165 ℃, 165℃, 165℃, 165℃, 165℃, 165℃, 165℃, 165℃, screw speed 200 rpm, melt temperature 193℃, melt pressure 0.1bar, torque 55~65N·m . After the extruded sample is cooled by wind, it is pelletized by COLLIN D-8017 pelletizer to obtain light yellow thermoplastic modified polyvinyl alcohol pe...

Embodiment 3

[0048] Thermoplastic modified polyvinyl alcohol processing technology: First, PVA-1 (PVA-1, alcoholysis degree 88%, polymerization degree 560, 4% weight percent concentration aqueous solution viscosity 7.8mPa·s) at 70℃, Dry for 4 hours under vacuum conditions, vacuum package, and reserve. Take 80 parts of PVA-1 and 20 parts of glycerin, and import them into Thermo SCIENTIFIC HAAKE PolyLab OS twin-screws from the Brabender TECHNOLOGIEDSR-18 and constant flow plunger pump (Dongtai Yanshan Instrument Factory, HLB-1008). In the extruder, the feed rate of polyvinyl alcohol is 0.48 kg / h, the feed rate of glycerol is 0.12 kg / h, the temperature of the extruder 1 to 9 and the die head are 150℃, 160℃, 165 ℃, 165℃, 165℃, 165℃, 165℃, 165℃, 165℃, 165℃, screw speed is 200 rpm, melt temperature is 192℃, melt pressure is 0.1bar, torque is 45~55N·m . After the extruded sample is cooled by wind, it is pelletized by COLLIN D-8017 pelletizer to obtain light yellow thermoplastic modified polyviny...

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Abstract

The invention relates to a thermoplastically modified high-fluidity polyvinyl alcohol casting film material and a preparation method thereof. A purpose of the present invention is mainly to solve theproblems of poor thermoplasticity, difficult processing, poor melt fluidity, easy thermal-oxidation degradation, difficult casting film preparation and poor mechanical property of polyvinyl alcohol inthe prior art. The technical scheme comprises that the thermoplastically modified high-fluidity polyvinyl alcohol is used, and comprises, by mass, 1) 70-99.9 parts f polyvinyl alcohol, and 2) 0.1-30parts of a plasticizer, the polyvinyl alcohol and the plasticizer are respectively introduced into a twin-screw extruder, and melt extrusion and granulation are performed through a screw rod extrusionprocessing technology to obtain the thermoplastically modified high-fluidity polyvinyl alcohol. With the technical scheme, the problems in the prior art are well solved. The method of the present invention can be used for industrial production of polyvinyl alcohol casting film materials.

Description

Technical field [0001] The invention relates to a thermoplastically modified high-fluidity polyvinyl alcohol cast film material and a preparation method thereof. Background technique [0002] Polyvinyl alcohol is a water-soluble polymer with excellent oxygen barrier, oil barrier, abrasion resistance, and chemical resistance. The thermoplastic masterbatch obtained by modification of polyvinyl alcohol is widely used in the transportation of pesticides and other toxic substances, gasoline and other special items, food, medical washing, textile packaging, electronic and electrical packaging. However, polyvinyl alcohol contains a large number of hydroxyl groups in its molecular chain, which is a semi-crystalline polymer, and its melting point is close to the decomposition temperature, making it difficult to process in thermoplastics. Therefore, it is of great significance to carry out research work on the processing and modification of polyvinyl alcohol thermoplastic. [0003] Known m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08K5/053B29C47/92B29L7/00B29C48/92
CPCB29C48/08B29C48/92B29C2948/92514B29C2948/9259B29C2948/92628B29C2948/92704B29L2007/00C08J5/18C08K5/053C08K2201/014C08L29/04C08L2201/08C08L2203/16C08L2205/025
Inventor 詹姆斯·洪学·王于志省严丽丽白瑜
Owner CHINA PETROLEUM & CHEM CORP
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