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High permeability rate composite gas-permeable membrane and preparation method thereof

A breathable film and air permeability technology, applied in chemical instruments and methods, flat products, other household appliances, etc., can solve the problems of sultry heat, non-puncture resistance, and air permeability film powder falling off, and achieve high air permeability and tensile strength. high effect

Inactive Publication Date: 2017-05-10
SICHUAN SHIMIAN JUFENG POWDER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The gas-permeable membrane produced by the existing formula technology has many defects, such as: tensile strength ≤ 8MPa, not puncture resistant; a large number of micropores with a pore size ≥ 30μm, which can cause liquid to permeate; average water vapor transmission rate ≤ 120000g / ㎡•24h , the disposable products made of it make people feel stuffy when used; the selected inorganic powder is improperly handled, causing the powder to fall off on the surface of the breathable membrane to irritate the skin, etc.
In view of the shortcomings of the current breathable membrane, especially the problem of low water vapor transmission rate in use, the inventor provides a new raw material plan and production preparation plan for a composite breathable membrane with high air permeability

Method used

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  • High permeability rate composite gas-permeable membrane and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0039] ①Put the components into a 110L internal mixer in proportion according to the following formula and knead for 24 minutes, then extrude through a Φ210 / Φ190 single-screw with a length-to-diameter ratio of 24:1, heat-cut granules after grinding, and obtain ultra-fine inorganic powder after air cooling Powder masterbatch:

[0040] LDPE 1F7B resin: 15 parts;

[0041] D97=4.6μm ultra-fine calcium carbonate powder: 95 parts;

[0042] Nengzhiguang E625 modifier: 6 parts;

[0043] KH550 dispersant: 5 parts;

[0044] Yanshan Petrochemical LP1000: 4 copies;

[0045] Mixing temperature zone 1 temperature Zone 2 temperature Zone 3 temperature Zone 4 temperature Head temperature Host speed Cutting speed 148℃ 135℃ 145℃ 150℃ 155℃ 150℃ 258r / min 125r / min

[0046] ②Put the components into a 200L high-speed mixer according to the following formula and stir for 5 minutes, then extrude through a Φ72 co-rotating twin-screw extruder with a length-to-...

Embodiment 2

[0073] ① According to the following formula, put the components into a 90L internal mixer in proportion and knead for 23 minutes, then extrude through a Φ160 / Φ145 single-screw with a length-to-diameter ratio of 26:1, grind and granulate, and air-cool to obtain ultra-fine inorganic Powder masterbatch:

[0074] LLDPE 7144 resin: 16 parts;

[0075] Talc powder with D97=2.5μm: 92 parts;

[0076] Nengzhiguang N408 modifier: 8 parts;

[0077] 1:1 mixture of aluminum isopropoxide and stearic acid: 5 parts;

[0078] 75# paraffin: 3 parts;

[0079] Mixing temperature zone 1 temperature Zone 2 temperature Zone 3 temperature Zone 4 temperature Head temperature Host speed Cutting speed 142℃ 130℃ 135℃ 135℃ 135℃ 140℃ 230r / min 110r / min

[0080] ②Put the components into a 200L high-speed mixer according to the following formula and stir for 5 minutes, then extrude through a Φ65 co-rotating twin-screw extruder with a length-to-diameter ratio of 40:1....

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Abstract

The invention belongs to the field of new material and plastic processing, and discloses composition of a high permeability rate composite gas-permeable membrane and a preparation method of the membrane. The high permeability rate composite gas-permeable membrane is prepared from master batch composed of polyolefin resin, ultrathin inorganic powder, an interface modifier, an inorganic powder dispersant and a processing lubricant, and processing rheological master batch composed of polyolefin resin, a processing rheological agent, a dispersant and an anti-aging agent, and after the master batch and the processing rheological master batch are mixed with at least one of optional polyolefin resin and copolyolefin resin, the high permeability rate composite gas-permeable membrane is obtained through three-layer composite co-extrusion equipment. The prepared composite gas-permeable membrane has the advantages of being high in gas permeation rate, hydrophilic in surface, free of electrostatic generation, good in penetration resistance, high in tensile strength and the like; the three-layer co-extrusion preparation technology increases the production line speed of the composite gas-permeable membrane and has the advantages of being high in productivity and low in unit product energy consumption, and the prepared composite gas-permeable membrane has the advantages of being high in strength, less in defect and free of stimulation.

Description

technical field [0001] The invention belongs to the field of new materials, and discloses a raw material composition of a high-permeability composite gas-permeable membrane, a preparation method thereof and a high-permeability composite gas-permeable membrane prepared from the raw material. Background technique [0002] Conventional plastic films are airtight, and the plastic films modified by unidirectional or biaxially stretched ultrafine inorganic powders form countless interconnected micropores (about 10 per square meter) 10 Micropores with a pore size of 0.1 μm to 5 μm), which have good permeability to air and water vapor, but have barrier properties to liquids due to the surface tension of liquids. Breathable membrane. The principle is that the plastic film modified by ultrafine inorganic powder is stretched by an appropriate external force, the polymer matrix and the rigid inorganic powder interface are peeled off, and the polymer is extended to form interpenetrating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K13/02C08K3/26C08K5/103C08K5/09C08J3/22B29C69/00B29C55/28B29C55/02B29C71/00B29C71/02B32B27/20B32B27/08B32B27/32B32B3/24B29L7/00B29L9/00
CPCC08L23/06B29C55/023B29C55/28B29C69/00B29C71/00B29C71/02B29L2007/00B29L2009/00B32B3/266B32B27/08B32B27/20B32B27/32B32B2250/03B32B2250/40B32B2307/54B32B2307/5825B32B2307/724B32B2307/726B32B2307/73B32B2307/734C08J3/226C08J2323/06C08J2423/06C08J2423/08C08K2201/003C08L2205/025C08L2205/035C08L2205/06C08L2207/066C08L23/0853C08L23/0815C08K13/02C08K2003/265C08K5/103C08K3/34C08K5/09
Inventor 张直黄云华刘武李静波李龙山杨信强罗义果
Owner SICHUAN SHIMIAN JUFENG POWDER
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