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High-resistance polypropylene carbonate based composite film material and preparation method thereof

A polypropylene carbonate and composite film technology, which is applied in the field of polymer materials, can solve the problems of opaque aluminum foil, cannot be widely used, and is difficult to recycle, and achieves the effects of simple preparation method, good economic benefits, and reduced greenhouse effect

Inactive Publication Date: 2014-05-21
HENAN TIANGUAN GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, the materials with excellent oxygen barrier properties that we are familiar with include aluminum foil, polyethylene-vinyl alcohol, polyvinyl alcohol, PVDC, etc., but these materials have certain deficiencies, such as: aluminum foil has weak anti-pinhole ability, and due to Aluminum foil is opaque, it is difficult to judge whether the processing and molding can achieve reliable heat sealing, etc.; polyethylene-vinyl alcohol and polyvinyl alcohol have excellent barrier properties to oxygen in a dry environment, but the barrier properties of this material are greatly affected by humidity. Barrier properties are greatly compromised under high humidity conditions
Chinese patent 102321324A discloses a method of using nano-silica particles to improve the barrier properties of polyethylene-vinyl alcohol and polyvinyl alcohol affected by humidity. However, due to the high price of polyethylene-vinyl alcohol, it is not widely used in packaging applications. There is still the problem of not being widely available
PVDC cannot be degraded, has no environmental protection characteristics, and is difficult to recycle, so people are constantly researching its alternatives

Method used

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  • High-resistance polypropylene carbonate based composite film material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0045] The preparation of a high-barrier polypropylene carbonate-based composite film material is calculated according to the number of parts by mass: first, 5 parts of polyvinyl alcohol with a degree of polymerization of 500 and an alcoholysis degree of 88% and 0.5 parts of talc powder and 33 parts of deionized Add water into the reaction vessel, heat in a water bath, raise the temperature to 80°C, stir and ultrasonically oscillate, heat at a constant temperature for 6 hours, acetone precipitation and suction filtration, wash with absolute ethanol three times, and dry in a vacuum oven at 80°C to obtain polyvinyl alcohol nano-inserts Layer the composite material and crush it; then dry 5 parts of polyethylene-vinyl alcohol particles in a vacuum oven at 80°C for 24 hours, and mix and stir the polyethylene-vinyl alcohol and the crushed polyvinyl alcohol nano-intercalation composite material at room temperature Homogeneously, melt-blended to obtain a plasticized polyvinyl alcohol n...

Embodiment 2

[0047] The difference between this embodiment and the first embodiment is that: polyvinyl alcohol is 10 parts, its degree of polymerization is 800, alcoholysis degree is 90%, layered silicate is 5 parts of montmorillonite powder, and deionized water is 150 parts parts, constant temperature heating time is 8h, plasticizer is 10 parts of polyester polyurethane particles, polypropylene carbonate is 90 parts, and its number average molecular weight is 100000Da.

Embodiment 3

[0049] The difference between this embodiment and Embodiment 1 is that: polyvinyl alcohol is 15 parts, its degree of polymerization is 1500, alcoholysis degree is 95%, layered silicate is 5 parts of chlorite powder, and deionized water is 400 parts parts, constant temperature heating time is 10h, plasticizer is 20 parts of polyether polyurethane, polypropylene carbonate is 80 parts, and its number average molecular weight is 150000Da.

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Abstract

The invention discloses a high-resistance polypropylene carbonate based composite film material and a preparation method thereof. The high-resistance polypropylene carbonate based composite film material comprises the following raw materials in parts by weight: 60-95 parts of polypropylene carbonate, 5-20 parts of polyvinyl alcohol, 0.5-10 parts of layered silicate and 5-20 parts of plasticizer. With the polypropylene carbonate as a base material, the degradable high-resistance polypropylene carbonate based composite film material is prepared through modification, wherein the oxygen permeability coefficient is low to 25cm<3>.mu m / (m<2>.24h.atm), and the water vapor permeability coefficient is low to 56g / (m<2>.24h). The high-resistance polypropylene carbonate based composite film material is improved in barrier property, thermal property and mechanical property when the original characteristic of the base material raw material is kept, especially improved in barrier performance, is capable of completely replacing high-resistance materials such as polyethylene-vinyl alcohol, and is used in the production of various packaging products requiring high resistance.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a high-barrier polypropylene carbonate-based composite film material and a preparation method thereof. Background technique [0002] At present, the materials with excellent oxygen barrier properties that we are familiar with include aluminum foil, polyethylene-vinyl alcohol, polyvinyl alcohol, PVDC, etc., but these materials have certain deficiencies, such as: aluminum foil has weak anti-pinhole ability, and due to Aluminum foil is opaque, it is difficult to judge whether the processing and molding can achieve reliable heat sealing, etc.; polyethylene-vinyl alcohol and polyvinyl alcohol have excellent barrier properties to oxygen in a dry environment, but the barrier properties of this material are greatly affected by humidity. Barrier properties are greatly compromised under high humidity conditions. Chinese patent 102321324A discloses a method of using nano-silica p...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L29/04C08K3/34C08J5/18
Inventor 孟跃中杨丹杜风光肖敏张晓阳王拴紧朱光兰翟黎鹏韩东梅甘力强
Owner HENAN TIANGUAN GRP
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