Full-biodegradable high-barrier vacuum evaporation film and preparation method thereof

A biodegradable, vacuum film technology, applied in the direction of chemical instruments and methods, coatings, layered products, etc., can solve unsatisfactory problems, achieve the effect of solving environmental problems, high utilization value, and excellent barrier effect
CN110435277AInactive Publication Date: 2019-11-12广东华通新材料科技有限公司 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
广东华通新材料科技有限公司
Publication Date
2019-11-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a biodegradable high-barrier vacuum evaporation film base material and a preparation method thereof. A film is sequentially composed of a high-barrier coating layer and a biaxially-oriented polylactic acid (BOPLA) film base material layer from top to bottom, wherein the base material layer consists of an upper surface layer, a core layer and a lower surface layer. The preparation method comprises the following two steps: firstly, preparing a polylactic acid film (BOPLA) base material meeting the coating requirement by using a horizontal drawing method, and then formingthe high-barrier coating layer on the surface of the film base material by using an online coating process or an offline coating process. According to an aluminum-plated film and an aluminum oxide-plated film which are produced by utilizing the high-barrier vacuum evaporation film base material prepared by the invention, the optimal oxygen permeability can be less than 0.02 cc / m<2>.24h, and the optimal water vapor permeability reaches 0.05 g / m<2>.24h; and the high-barrier vacuum evaporation film base material not only has an excellent barrier effect, but also is biodegradable, can effectivelysolve the environmental problem caused by waste packaging films, and is high in industrial utilization value.
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Description

technical field

[0001] The invention relates to a high-barrier packaging film, in particular to a biodegradable high-barrier vacuum evaporation film substrate and a preparation method thereof. Background technique

[0002] Food, medicine, and electronic devices are prone to spoilage or failure in the presence of moisture and oxygen. The use of high-barrier packaging materials to protect processed products is key to solving this problem. High barrier film materials stand out for their excellent barrier properties and have become the preferred way of packaging products in many industries. At present, the usual preparation method of high-barrier packaging films on the market is to coat high-barrier coatings on film substrates and compound them with other functional films. The substrate used is generally one or more of BOPET, BOPP, CPP, BOPA and BOPE.

[0003] Due to the light weight of the packaging film and the variety of substrates, this limits the recyclability of the fil...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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