One-step breathable film and preparation method thereof

A gas-permeable film and one-step technology, which is applied in the field of one-step gas-permeable film and its preparation, can solve the problems of low water vapor transmission rate, poor comprehensive performance of the gas-permeable film, and uneven thickness of the film, so as to save granulation configuration Artificial, high water vapor transmission efficiency, and the effect of reducing the degradation of raw materials

Pending Publication Date: 2021-01-19
福建琦峰科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The traditional two-step breathable film manufacturing method is traditionally used. Because the twin-screw extruder is directly used to make cast film, it is easy to cause uneven thickness of the film. On the one hand, because the twin-screw is forced to feed, as long as the material is not uniform , it is easy to cause uneven extrusion. On the other hand, because the particle size and specific gravity of PE particles and calcium carbonate powder are too different, uneven feeding will inevitably occur, and calcium carbonate powder with a large specific gravity is easy to discharge. The sinking is faster, and the feeding of PE particles with small specific gravity is slow, and it is easy to appear that the

Method used

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Embodiment 1

[0039]A method for preparing a one-step gas-permeable film. The one-step gas-permeable film is produced by a one-step film blowing device, which includes the following steps:

[0040]A. Inorganic powder activation treatment: Put the inorganic powder with a particle size of 1~3um into a high-speed mixer, and perform dehydration treatment at a speed of 400~1000r / min and a temperature of 100~150℃ for 5~15min; then add the compound Surface active coupling agent, mixed and coated at a speed of 400-1000r / min and a temperature of 100-150°C for 5-15min to make an active inorganic powder;

[0041]In step A, the mass ratio of the inorganic powder to the composite surface active coupling agent is 10:0.7-0.9;

[0042]B. Use the mixing device 1 to mix the air-permeable film plastic particles uniformly to form mixed air-permeable film plastic particles, and then convey them to the feeding port of the twin-screw extruder 5, and use the first feeding device 2 to discharge the active inorganic powder The bod...

Embodiment 2

[0055]A method for preparing a one-step gas-permeable film. The one-step gas-permeable film is produced by a one-step film blowing device, which includes the following steps:

[0056]A. Inorganic powder activation treatment: Put the inorganic powder with a particle size of 1 into a high-speed mixer, and carry out dehydration treatment at a speed of 400r / min and a temperature of 100°C for 15min; then add a composite surface active coupling agent at a temperature of 400r / min. / min speed, 100 ℃ temperature for 15min mixed coating treatment, made into active inorganic powder;

[0057]In step A, the mass ratio of the inorganic powder to the composite surface active coupling agent is 10:0.7;

[0058]B. Use the mixing device 1 to mix the air-permeable film plastic particles uniformly to form mixed air-permeable film plastic particles, and then convey them to the feeding port of the twin-screw extruder 5, and use the first feeding device 2 to discharge the active inorganic powder The body is fed fro...

Embodiment 3

[0071]A method for preparing a one-step gas-permeable film. The one-step gas-permeable film is produced by a one-step film blowing device, which includes the following steps:

[0072]A. Inorganic powder activation treatment: Put the inorganic powder with a particle size of 3um into a high-speed mixer, and perform dehydration treatment at a speed of 1000r / min and a temperature of 150°C for 5min; then add a composite surface active coupling agent at a temperature of 1000r / min. / min speed, 150℃ temperature for 5min mixed coating treatment, made into active inorganic powder;

[0073]In step A, the mass ratio of the inorganic powder to the composite surface active coupling agent is 10:0.9;

[0074]B. Use the mixing device 1 to mix the air-permeable film plastic particles uniformly to form mixed air-permeable film plastic particles, and then convey them to the feeding port of the twin-screw extruder 5, and use the first feeding device 2 to discharge the active inorganic powder The body is fed from...

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Abstract

The invention discloses a one-step breathable film and a preparation method thereof. The one-step breathable film is prepared by one-step film blowing equipment, and the preparation method comprises the following steps: A, inorganic powder is activated to prepare active inorganic powder; B, mixed breathable film plastic particles and the active inorganic powder form a mixed melt in a double-screwextruder, and the mixed melt sequentially passes through a first metering pump and a melt pressure buffer area, then enters a feeding port of a single-screw extruder, and then enters a film blow molding machine through a second metering pump to be subjected to extrusion blow molding to prepare a primary film; then, longitudinal stretching is performed; and thickness measurement control, corona treatment, film deviation rectification, thick edge cutting and rolling are carried out to prepare the one-step breathable film. The one-step breathable film is high in water vapor transmission rate, good in breathability, high in first-hour water vapor transmission rate and high in water vapor transmission efficiency; the one-step breathable film is high in static water pressure resistance and doesnot leak liquid water during use; and the one-step breathable film is degradable and does not cause any pollution to the environment.

Description

Technical field[0001]The invention relates to the field of film materials, in particular to a one-step gas permeable film and a preparation method thereof.Background technique[0002]A breathable film material used in the production of sanitary products such as diapers, sanitary napkins and medical disposable products such as medical protective clothing, sanitary care pads, etc., is made of polyethylene or polypropylene and other plastics by casting or blow molding. The film is then made by the longitudinal stretching process. Polyethylene or polypropylene materials are petroleum refining products. After use, they are hard to be degraded as solid waste in the environment, and therefore have an adverse impact on the environment.[0003]In addition, the currently used breathable film materials still have the following problems:[0004]1. The traditional two-step method of manufacturing breathable film is traditionally used. Because the twin-screw extruder is directly used as a cast film, it...

Claims

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Application Information

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IPC IPC(8): B29C69/02B29C48/00B29C48/025B29C48/10B29C48/285C08L23/06C08L23/08C08L67/04C08K13/06C08K9/10C08K3/26C08K7/26C08K3/22C08K7/10C08J5/18B29L7/00
CPCB29C48/0017B29C48/0018B29C48/022B29C48/025B29C48/10B29C48/288C08J5/18B29L2007/002C08J2323/06C08J2423/08C08J2467/04C08K13/06C08K9/10C08K3/26C08K7/26C08K7/10C08K2201/011C08K2003/2227
Inventor 吴启明陈晓峰高永康李达宁江登科
Owner 福建琦峰科技有限公司
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