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PH-controlled polyolefin breathable film composition and method for preparing composition particles

A technology of breathable film and composition, applied in the field of pH-controllable polyolefin breathable film composition, which can solve the problems of high pH of film products and human health hazards

Inactive Publication Date: 2011-10-12
QUANZHOU HENGFENG SANITARY MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest defect of the products made by this method is that at least 50% of the inorganic fillers are added to the composition, and a small amount of alkaline substances contained in the inorganic fillers, such as CaO, MgO, etc., easily cause the pH of the film products to be significantly higher
[0008] If the human skin is exposed to substances with a high pH for a long time, it may cause certain harm to human health.

Method used

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  • PH-controlled polyolefin breathable film composition and method for preparing composition particles
  • PH-controlled polyolefin breathable film composition and method for preparing composition particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Put 60kg of calcium carbonate (particle size 2-4μm) in a high-speed mixer (temperature 125±5°C), add 0.6kg of stearate dispersant, stir at 1500r·p·m for 10 minutes, then add 2kg of organic acid Materials, after stirring at high speed for 10 minutes, add 15kg of low-density polyethylene and 30kg of linear low-density polyethylene. After the high-speed mixer mixes evenly at a low speed, it is fed into a two-stage twin-screw extruder for extrusion, pelletizing, drying, and packaging.

Embodiment 2

[0035] Put 50kg of calcium carbonate (particle size 1-3μm) in a high-speed mixer (temperature 125±5°C), add 0.4kg of stearate dispersant, stir at 1500r·p·m for 10 minutes, then add 4kg of organic acidic materials 10kg of low-density polyethylene, 27kg of linear low-density polyethylene, and 8kg of high-density polyethylene were added after high-speed stirring for 10 minutes. The high-speed mixer mixes evenly at a low speed and feeds it into a two-stage twin-screw extruder for extrusion, pelletizing, drying, and packaging.

Embodiment 3

[0037] According to the same processing conditions as in Example 2, organic acid materials with different proportions were used to prepare pH-controllable polyolefin breathable film compositions, and the compositions were prepared through T-die breathable films M-01, M-02, M-03, M -04, see Table 1. Film weight 30g / m 2 , stretch ratio 1.86. The physical and mechanical properties were measured and listed in Table II.

[0038] Table I:

[0039]

[0040] Table II:

[0041]

[0042] From the results of the examples in Table 2, it can be concluded that the addition of organic acidic materials can effectively adjust the acidity and alkalinity of the polyolefin breathable film, and has little effect on the physical and mechanical properties of the polyolefin breathable film.

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Abstract

The invention discloses a pH-controlled polyolefin breathable film composition. The pH-controlled polyolefin breathable film composition comprises an inorganic filler, a polyolefin resin, a stearate dispersant and an organic acid material. Compared with the prior art, the adding of the organic acid material in the pH-controlled polyolefin breathable film composition cannot affect the dispersion level of a breathable film, and the pH value of a film product can be controlled by adjusting the variety and using amount of the organic acid material.

Description

technical field [0001] The invention relates to a pH controllable polyolefin breathable film composition and a method for preparing particles of the composition. Background technique [0002] Breathable membrane, also known as waterproof and breathable microporous membrane, refers to the polymer material that does not allow liquids such as water droplets to pass through, but can ensure the free passage of water vapor. Breathable membranes have been widely used in many fields such as hygiene products and medical products in daily life. [0003] The manufacturing methods of many breathable films that have been disclosed mainly include: stretching high-fill plastic film technology; molecular film forming technology that can form a microporous network aggregate structure; phase separation film forming technology; hollow fiber microporous membrane technology; chemical crosslinking Foam technology; physical mechanical perforation technology. The stretch filling technology is the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L23/12C08K9/04C08K3/26C08K3/36C08K3/22
Inventor 周珍琪丁志勤
Owner QUANZHOU HENGFENG SANITARY MATERIAL TECH
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