Composition of air-permeable film with low permeation volume and preparation method thereof

A technology of air permeability and breathable film, which is applied in the field of polyolefin composition, can solve problems such as poor compatibility, unsatisfactory dispersion performance, and uneven air permeability of materials, so as to increase compatibility, improve drawing efficiency and flatness, The effect of enhancing mechanical properties and thermal stability

Inactive Publication Date: 2012-02-01
KINGFA SCI & TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its disadvantage is that the compatibility of nanoparticles and polyolefin resin is poor, which will cause uneven air permeability of the material and affect the use.
The advantage i...

Method used

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  • Composition of air-permeable film with low permeation volume and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh certain components and weight percentages as shown in Table 1 by weight percentage, and make the low air permeability gas permeable membrane according to the present invention according to the following steps: 1) Micron-sized inorganic particles are added with coupling agent and mixed at high speed After pretreatment, the micron-sized inorganic filler treated with the coupling agent is added to the feed port of the twin-screw extruder through a metering feeder; 2) polyolefin resin LLDPE (MI: 3.5 density 0.922), ethylene Propylene copolymer, modifier special elastomer EVOH, maleic anhydride graft, lubricant fluoropolymer, zinc stearate, hindered phenolic antioxidant, titanate coupling agent 3) Then feed it into the feed port of the extruder through a metering feeder, melt through twin-screw processing, extrude and granulate to obtain a breathable composition. The extruder is a co-rotating twin-screw extruder with an aspect ratio of 48:1, Do / Di>1.51, a screw speed o...

Embodiment 2

[0031] Weigh certain components and weight percentages as shown in Table 1 by weight percentage, and manufacture the low air flow gas permeable membrane of the present invention according to the following steps: 1) Add coupling agent to micron-sized inorganic particles and pass through a high-speed mixer High-speed mixing, after pretreatment, add the micron-sized inorganic filler treated with the coupling agent to the feed port of the twin-screw extruder through a metering feeder; 2) Mix polyolefin resin medium density polyethylene, ethylene octene copolymer, Modified inorganic particles barium sulfate, titanium dioxide, modifier petroleum resin, EVA, EVOH, lubricant PE wax, calcium stearate, phenolic antioxidant, silane coupling agent are premixed through a premixer, 3) and then It is fed into the feed port of the extruder through a metering feeder, melted through twin-screw processing, extruded and granulated to obtain a breathable composition. The extruder is a co-rotating ...

Embodiment 3

[0033]Weigh certain components and weight percentages as shown in Table 1 by weight percentage, and manufacture the low air flow gas permeable membrane of the present invention according to the following steps: 1) Add coupling agent to micron-sized inorganic particles and pass through a high-speed mixer High-speed mixing, after pretreatment, add the micron-sized inorganic filler treated with the coupling agent to the feed port of the twin-screw extruder through a metering feeder; 2) Add polyolefin resin high-density polyethylene, ethylene and butene copolymer , modified inorganic particles talc powder, calcium carbonate, modifier special polybutene elastomer, EVA, POE, lubricant E wax, oleic acid amide, amine antioxidant, aluminate coupling agent through the premixer Premixing, 3) then feeding into the feed port of the extruder through a metering feeder, melting through twin-screw processing, extruding and granulating to obtain a breathable composition. The extruder is a co-ro...

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Abstract

The invention discloses a composition of an air-permeable film with a low permeation volume. The composition consists of the following components in percentage by weight: 30-60 percent of polyolefin resin mixture, 5-15 percent of permeation volume regulator, 30-55 percent of surface-modified nano-grade organic particles, 0.2-0.5 percent of antioxidant, 0.1-2.0 percent of lubricant and 1-3 percent of coupling agent. A preparation method of the composition comprises the following steps of: mixing a micro-grade inorganic filler with the coupling agent in a high-speed mixer to obtain a pretreated filler; feeding the pretreated filler, polyolefin resin, a modifier, the antioxidant and the lubricant into a double screw extruder by using a feeding system, extruding, cooling, pelletizing, drying, and packaging with an aluminum film bag in vacuum to obtain a finished air-permeable film composition with low permeation volume; and casting the prepared composite by using an extruder with a T-shaped film head, and stretching with a single shaft in two steps, wherein the stretching rate is 0.5-3.5. The invention has the advantages: 1, the nano inorganic filler is added, so that the mechanical property of the air-permeable film can be enhanced; 2, the surface of the inorganic particles is coupled, so that the compatibility with the polyolefin resin can be enhanced; 3, due to the adoption of the T-shaped film head, the drawing efficiency and the flatness can be fully enhanced; and 4, due to the adoption of the permeation volume regulator, the permeation volume of the air-permeable film can be lowered remarkably.

Description

technical field [0001] The invention relates to a polyolefin composition of a low-air-permeable air-permeable film, and provides a preparation method of the low-air-permeable air-permeable film. Background technique [0002] Breathable film is a kind of polymer filled with a certain proportion of mineral fillers, which forms a controllable size gap around the filler, which allows water vapor, air and other gases to pass through, but does not allow liquids to pass through. It is mainly used for the production of baby diapers, women's hygiene Products such as towels, medical protective clothing, and heating and cooling packs (heating patches). Its production method is to stretch the breathable film composite particles after casting or blow molding. During the stretching process, the polymer is stretched and the inorganic particles added to it cannot be stretched, thus producing micropores that can pass through. The micropores of water vapor, because of the relatively small di...

Claims

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Application Information

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IPC IPC(8): C08L23/00C08L23/06C08L23/08C08L23/12C08L23/16C08L23/20C08L57/02C08L51/00C08K13/06C08K9/06C08K9/04C08K3/26C08K3/34C08K3/30C08K3/22C08K3/36B29C69/00B29C47/92B29C41/24B29C55/04B29B9/06B29C48/92
CPCB29C48/04B29C48/08B29C48/40
Inventor 赵治国何浏炜王斌肖鹏叶南飚陶四平
Owner KINGFA SCI & TECH CO LTD
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