Environment-friendly thermoplastic polyurethane (TPU) film and preparation method thereof

A kind of thin film and environmental protection technology, applied in the field of environmental protection TPU film and its preparation, can solve the problems of poor tear strength of TPU film products, poor heat resistance of TPU film, easy stickiness of TPU film, etc., and achieve stickiness and tear strength Improvement and low production cost

Inactive Publication Date: 2013-03-13
FUJIAN SIJIA ENVIRONMENTAL PROTECTION MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing TPU film has poor heat resistance, and at high temperature, the TPU film is easy to stick
In order to avoid the problem of high temperature stickiness of TPU film, it is often necessary to add a large amount of slip agent, which will cause the slip agent in TPU film products to easily precipitate, and the tear strength of TPU film products is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] The preparation method of environment-friendly TPU film of the present invention comprises the following steps:

[0037] 1) Weigh each component according to the formula and mix them evenly;

[0038] 2) Dry the uniformly mixed components in step 1) in a dehumidifier for 3-5 hours at a drying temperature of 80-90°C, and then send them to the tape casting machine through the feeding system for extrusion. Among them, each section of the tape casting machine The temperature setting is as follows: barrel temperature is 140-170°C; filter screen temperature is 170-180°C; elbow temperature is 170-180°C; connection temperature is 170-180°C; die head temperature is 170-180°C;

[0039] 3) Emboss the surface of the tape-cast TPU film in step 2), and the embossing pressure is 30-50kgf.

Embodiment 1

[0041] A. Preparation of PP functional masterbatch;

[0042] 1) Weigh each component of the PP functional masterbatch, put it into a mixer and mix evenly; the components and contents of the PP functional masterbatch are:

[0043] PP particles 100 parts;

[0044] The compatibilizer is maleic anhydride grafted homopolypropylene; 3 parts;

[0045] 30 parts of kaolin;

[0046] 0.2 part of glass fiber.

[0047] 2) Feed the uniformly mixed components in step 1) into the twin-screw extruder to heat and melt. The temperature of the twin-screw extruder section is set as: 181~185°C in the first zone; 180~183°C in the second zone; 180~183°C in the third zone 176~180℃; 182~185℃ in four zones;

[0048] 3) The glass fiber is fed from the opening of the die port of the twin-screw extruder, blended and melted with other components, extruded, cooled, and pelletized to obtain the PP functional masterbatch.

[0049] B. Preparation of TPU film

[0050] 1) Weigh each component according to t...

Embodiment 2

[0058] A. Preparation of PP functional masterbatch;

[0059] 1) Weigh each component of the PP functional masterbatch, put it into a mixer and mix evenly; the components and contents of the PP functional masterbatch are:

[0060] PP particles 100 parts;

[0061] The compatibilizer is 10 parts of maleic anhydride graft copolymerized polypropylene;

[0062] Kaolin 5 parts;

[0063] Glass fiber 2.5 parts.

[0064] 2) Feed the uniformly mixed components in step 1) into the twin-screw extruder to heat and melt. The temperature of the twin-screw extruder section is set as: 181~185°C in the first zone; 180~183°C in the second zone; 180~183°C in the third zone 176~180℃; 182~185℃ in four zones;

[0065] 3) The glass fiber is fed from the opening of the die port of the twin-screw extruder, blended and melted with other components, extruded, cooled, and pelletized to obtain the PP functional masterbatch.

[0066] B. Preparation of TPU film

[0067] 1) Weigh each component according...

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PUM

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Abstract

The invention discloses an environment-friendly thermoplastic polyurethane (TPU) film. The environment-friendly TPU film comprises TPU particles, propene polymer (PP) particles, a compatilizer, a PP functional masterbatch and a TPU color masterbatch. The preparation method of the environment-friendly TPU film comprises the following steps: (1) weighing the components based on the formula and mixing uniformly; (2) drying the uniformly mixed components in step (1) in a dehumidification dryer for 3-5h at 80-90 DEG C, and feeding the components into a casting machine through a feeding system, and extruding; (3) and embossing the surface of the TPU film subjected to tape casting in step (2). The prepared TPU film is high in thermal stability and tearing strength, is unlikely to be sticky at high temperature, and is improved in processing performance and low in production cost. The strength (particularly tearing strength) of products produced by the TPU film is improved.

Description

technical field [0001] The invention relates to a TPU film, in particular to an environment-friendly TPU film and a preparation method thereof. Background technique [0002] TPU film is a functional film, which has the characteristics of high strength, good toughness, cold resistance, oil resistance, aging resistance, weather resistance, environmental protection, non-toxic, decomposable and other characteristics unmatched by other plastic materials; at the same time, it has high waterproof and moisture permeability, windproof, It has many excellent functions such as cold protection, antibacterial, warm, anti-ultraviolet and energy release, and is widely used in various fields. [0003] However, the existing TPU film has poor heat resistance, and the TPU film tends to become sticky at high temperature. In order to avoid the problem of high temperature stickiness of TPU film, it is often necessary to add a large amount of slip agent, which will cause the slip agent in TPU fil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L23/12C08K7/14C08K3/34B29C47/92B29C48/92
CPCB29C48/08
Inventor 林生雄张宏旺黄万能蒋石生
Owner FUJIAN SIJIA ENVIRONMENTAL PROTECTION MATERIAL TECH
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