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Water-resistant heat-resistant PVA biodegradable film

A biodegradable and heat-resistant technology, applied in the field of agricultural film, can solve the problems of restricting the industrial production and development of PVA film, limited application fields, and stagnation of preparation technology, so as to expand the scope of application and practical value, increase flame retardancy and Flexibility, the effect of reducing the processing cost

Active Publication Date: 2019-04-12
NEW NAVIGATOR PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, although my country's PVA production capacity exceeds that of other countries in the world, its preparation technology is still stuck in the solution casting method with high cost, and its application fields are limited to fibers, adhesives, and coatings, which limits the development of industrial production of PVA films.

Method used

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  • Water-resistant heat-resistant PVA biodegradable film
  • Water-resistant heat-resistant PVA biodegradable film
  • Water-resistant heat-resistant PVA biodegradable film

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preparation example Construction

[0101] The second content of the present invention provides a kind of preparation method of described PVA film, comprises steps as follows:

[0102] The first step: uniformly mix PVA, crosslinking agent, plasticizer and lubricant by weight;

[0103] Step 2: Extrude through twin-screw at 170°C to 220°C to form thin sheets;

[0104] The third step: forming a PVA film by rolling and pulling, and the thickness of the PVA film obtained in the third step is 5-30 μm.

[0105] Preferably, the preparation steps of the PVA film are as follows:

[0106] A1: firstly mix 100 parts of PVA, 1-10 parts of borosilicate cross-linking thoroughly, then add glycerin and dodecylglyceride and mix evenly to obtain a mixture;

[0107] A2: Add the above mixture into a twin-screw extruder, extrude to form PVA sheets, and set the extrusion temperature at 180°C;

[0108] A3: The thickness of the PVA film obtained by rolling and pulling is 15 μm, and it is humidified, cut and rolled. After the film is ...

Embodiment 1

[0112] Embodiment 1 provides a water-resistant and heat-resistant PVA biodegradable film. In parts by weight, the raw materials for preparing the PVA film include: 100 parts of PVA, 6 parts of crosslinking agent, 22 parts of plasticizer and 2 parts of lubricant;

[0113] The polyvinyl alcohol has a degree of polymerization of 2400 and a degree of alcoholysis ≥ 98%;

[0114]The crosslinking agent is borosilicate resin, which is synthesized by silane monomer and boric acid through hydrolysis reaction and dehydration condensation reaction;

[0115] The weight average molecular weight of the borosilicate resin is 900-1000;

[0116] The raw materials for the preparation of the borosilicate resin include n-octyltriethoxysilane, phenyltriethoxysilane and boric acid; the best n-octyltriethoxysilane, phenyltriethoxysilane and boric acid The molar ratio is 1.5:2:0.5;

[0117] The preparation steps of the borosilicate resin are as follows:

[0118] B1. Alkane silane monomers and aroma...

Embodiment 2

[0133] Embodiment 2 provides a kind of water-resistant and heat-resistant PVA biodegradable film, its specific implementation method is the same as embodiment 1, the difference is, by weight, the preparation raw material of described PVA film comprises: 100 parts of PVA, 1 part of trans Joint agent, 15 parts of plasticizer and 0.1 part of lubricant.

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Abstract

The invention belongs to the technical field of agricultural films and more specifically relates to a water-resistant heat-resistant PVA biodegradable film. The water-resistant heat-resistant PVA biodegradable film provided by the invention is prepared from the raw materials: 100 parts of PVA, 1-10 parts of cross-linker, 15-40 parts of plasticizer and 0.1-5 parts of lubricant.

Description

technical field [0001] The invention belongs to the technical field of agricultural films, and more specifically relates to a water and heat-resistant PVA biodegradable film. Background technique [0002] Today, when cities are surrounded by garbage, the most important source of white pollution is packaging materials. Therefore, it is necessary to develop fully biodegradable packaging plastic films. Polyvinyl alcohol (PVA) has the advantages of biodegradability, wide source, high strength, high light transmittance, antistatic, oil resistance, etc. It is an ideal fully biodegradable material, especially suitable for fully biodegradable materials with environmental protection functions. Packaging Materials. Among them, PVA with a degree of alcoholysis of 88% can be used to produce water-soluble plastic films and other products at room temperature; PVA with a degree of alcoholysis of 99% has water resistance at room temperature, and can still maintain most of its strength and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L83/14C08K5/053C08K5/10C08K3/38C08G77/56C08J5/18
CPCC08G77/56C08J5/18C08J2329/04C08J2483/14C08K5/053C08K5/10C08K2003/387
Inventor 李颖熙
Owner NEW NAVIGATOR PLASTICS
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