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Preparation method for polypropylene film

A technology of polypropylene film and polypropylene, which is applied in the chemical industry, can solve problems such as voids in polypropylene films, and achieve the effect of expanding the scope of application

Inactive Publication Date: 2017-11-24
广东乐将生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention proposes a method for preparing a polypropylene film, which solves the problem that the polypropylene film has voids in the prior art

Method used

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  • Preparation method for polypropylene film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of polypropylene film, comprising:

[0023] (1) heating the raw material to 180°C;

[0024] (2) Roll the heated raw material through the pulley block. The pulley block includes two sets of extruding pulley blocks. The extruding pulley block includes two extruding pulleys facing up and down. Extrusion pulley block 2, the raw material is extruded from two extrusion pulleys, and the gap between the two extrusion pulleys is 1.8mm; the temperature of the raw material is 180°C when it passes through the front extrusion pulley block 1, and after passing through the rear extrusion pulley block 2 The temperature at the time is 150°C;

[0025] (3) Gradually lower the temperature to normal temperature, wind up and store.

[0026] Among them, the ratio of raw materials is 30% of polypropylene, 60% of calcium carbonate, 5% of silicon dioxide, and 5% of kaolin. Polypropylene is the main film-forming substance. Calcium carbonate can adjust the degradation time ...

Embodiment 2

[0028] A preparation method of polypropylene film, comprising:

[0029] (1) heating the raw material to 160°C;

[0030] (2) Roll the heated raw material through the pulley block. The pulley block includes two sets of extruding pulley blocks. The extruding pulley block includes two extruding pulleys facing up and down. Extrusion pulley block 2, the raw material is extruded from two extrusion pulleys, and the gap between the two extrusion pulleys is 0.2mm; the temperature of the raw material is 160°C when it passes through the front extrusion pulley block 1, and after passing through the rear extrusion pulley block 2 The temperature at the time is 120°C;

[0031] (3) Gradually lower the temperature to normal temperature, wind up and store.

[0032] Among them, the ratio of raw materials is 85% of polypropylene, 8% of calcium carbonate, 3% of silicon dioxide, and 4% of kaolin.

Embodiment 3

[0034] A preparation method of polypropylene film, comprising:

[0035] (1) heating the raw material to 170°C;

[0036] (2) Roll the heated raw material through the pulley block. The pulley block includes two sets of extruding pulley blocks. The extruding pulley block includes two extruding pulleys facing up and down. Extrusion pulley block 2, the raw material is extruded from two extrusion pulleys, and the gap between the two extrusion pulleys is 0.8mm; the temperature of the raw material is 160°C when it passes through the front extrusion pulley block 1, and after passing through the rear extrusion pulley block 2 The temperature at the time is 130°C;

[0037] (3) Gradually lower the temperature to normal temperature, wind up and store.

[0038] Among them, the ratio of raw materials is 70% of polypropylene, 20% of calcium carbonate, 5% of silicon dioxide, and 5% of kaolin.

[0039] The polypropylene film obtained in Example 1 can be used for the preparation of environment...

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Abstract

The invention provides a preparation method for a polypropylene film. The preparation method comprises the steps that (1) a raw material is heated to 120-180 DEG C; (2) the heated raw material is rolled through a pulley block; and (3) the temperature is gradually lowered to the normal temperature. A traditional film making technology is replaced, the pulley block is adopted for rolling, accordingly, the problem that polypropylene films prepared through the traditional preparation technology have gaps is solved, that is, the obtained polypropylene film is in a real film form instead of a woven silk form, and the water leakage phenomenon is avoided when the polypropylene film is made into a bag, a heat preservation film and other products.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a preparation method of a polypropylene film. Background technique [0002] Polypropylene film, also commonly known as non-woven fabric, is degradable and has a wide range of applications. However, due to the nature of its non-woven fabric, the film is easy to be filamentous and has gaps, which may cause water leakage during application. , easy to ventilate nature, resulting in limited application effect and range, for example, if it is applied on the environmental protection bag, it is easy to leak water, affecting the use effect, and there are few users, and if it is used on the mulch film, the mulch film will be breathable due to the gap If the phenomenon is too serious, the insulation effect will be greatly reduced. [0003] While taking advantage of the degradability of polypropylene film, the gaps obtained by traditional techniques also limit its application. Therefore, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C43/24B29C43/52B29C43/58B29K23/00B29L7/00
CPCB29C43/24B29C43/52B29C43/58B29C2043/5816B29K2023/12B29L2007/00
Inventor 郭升程马兴寿陈泽鹏
Owner 广东乐将生物科技有限公司
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