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High water vapor permeability cast film

A water vapor permeable, cast film technology, applied in the field of high water vapor permeable cast film, can solve the problems of poor water vapor permeability, etc., and achieve the effect of simple and easy preparation method and easy popularization and application

Active Publication Date: 2015-12-02
山东悦泰生物新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the disadvantage of poor water vapor permeability of traditional PE cast film, the present invention provides a cast film with high water vapor permeability, and the cast film can be completely biodegraded, which is a completely green environmental protection product

Method used

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Embodiment Construction

[0021] The present invention is further described below in conjunction with embodiment.

[0022] The preparation of the casting film in the embodiment of the invention is divided into two steps: (1) Material preparation: add each raw material component into a high-speed mixer, mix it evenly and release it, and then add it to a co-rotating parallel twin-screw extruder for co-extrusion A completely biodegradable cast film material is obtained by granulation, and the extrusion temperature is 140-160°C; (2) Cast film preparation: put the cast film material into the PE cast film extruder, flow Film extension, extrusion temperature: 160-180°C, die head temperature: 170-180°C, casting roll and rubber roll temperature: 10-50°C.

[0023] The co-rotating parallel twin-screw extruder used is: the diameter of the screw is 62.5 mm, the ratio of length to diameter is 48:1, and the barrel has 12 heating zones in total. The cast film machine used is a PE cast film extruder: screw diameter 15...

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Abstract

The invention relates to a cast film with high water vapor permeability. The cast film with high water vapor permeability consists of the following components in percentage by weight: 60-90% of poly(butylene-adipate-co-terephthalate) (PBAT), 1-2% of polymer powder and 8-39% of a composite inorganic filler, wherein the composite inorganic filler consists of inorganic fillers with different types, different shapes and different particle sizes according to a certain proportion; a principle that the polymer powder is in compatible with the PBAT is used, and the irregular composite filler is dispersed to result in the fact that a lot of microporous structures are generated in a film, so that high water vapor permeability of the film is realized, and the cast film can be completely degraded biologically and is the best substitute of a common cast film.

Description

technical field [0001] The invention relates to a casting film with high water vapor permeability. Background technique [0002] Since its birth, plastic has quickly become the mainstay of packaging materials due to its advantages of light weight and easy molding. Plastic film accounts for the largest share in the plastic packaging industry. Compared with blown film, cast film has become a packaging film because of its fast production speed, high output, good transparency, good gloss, and good thickness uniformity. The best of the best. [0003] my country's cast film production started late and has a relatively weak foundation, but its development speed is relatively fast. After nearly 20 years of continuous development and growth, my country's current cast film has become a sunrise industry with considerable production capacity and production level in the packaging industry. Compared with blown film, cast film not only has fast production speed, high output, good transp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08K3/26C08K3/34C08K3/30C08K3/22
Inventor 庞买只李宗华卢伟
Owner 山东悦泰生物新材料有限公司
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