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Biaxially oriented polypropylene base film with high surface energy

A polypropylene base film, biaxial stretching technology, applied in the field of polypropylene film, can solve the problem of low surface energy and achieve the effect of reliable bonding force

Pending Publication Date: 2022-04-29
KUSN JIAPU PACKING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a biaxially stretched polypropylene base film with high surface energy, the purpose of which is to solve the problem of low surface energy of the polypropylene base film from structural design

Method used

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  • Biaxially oriented polypropylene base film with high surface energy
  • Biaxially oriented polypropylene base film with high surface energy
  • Biaxially oriented polypropylene base film with high surface energy

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Experimental program
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Effect test

Embodiment 1

[0059]

[0060] The polarity of the functional group (carboxyl group) contained in the hook chain layer is greater than that of the functional group (hydroxyl group) contained in the outer layer;

[0061] The surface tension of the high surface layer is 50 dynes / cm, which is greater than 38 dynes / cm.

Embodiment 2

[0063]

[0064] The polarity of the functional group (carboxyl group) contained in the hook chain layer is greater than that of the functional group (hydroxyl group) contained in the outer layer;

[0065] The surface tension of the high surface layer is 46 dynes / cm, which is greater than 38 dynes / cm.

Embodiment 3

[0067]

[0068] The polarity of the functional group (ester group) contained in the hook chain layer is equal to the polarity of the functional group (ester group) contained in the outer layer;

[0069] The surface tension of the high surface layer is 40 dynes / cm, which is greater than 38 dynes / cm.

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Abstract

The invention relates to a biaxially oriented polypropylene base film with high surface energy, which is prepared from the following at least five layers of structures through co-extrusion and biaxially oriented stretching processes, and the five layers of structures sequentially comprise an outer layer, a hook chain layer, a main stretching layer, a transition layer and an inner layer in the thickness direction of the base film, the high surface adhesive force between the base film and other films or layers can be improved in a chemical bond mode, and the hook chain layer is transition of polarity and compatibility between the main stretching layer and an outer layer material. The main stretching layer is a functional layer undertaking a main stretching task in a two-way stretching processing process; the transition layer is used for transition of melting temperature between the main stretching layer and the inner layer material; and the inner layer is a heat sealing layer. The base film with high surface energy is obtained by endowing the surface layer with polarity, so that the high adhesive force of the surface of the PE base material is realized. Through the design that the weight of the polyolefin is greater than or equal to 90% of the total weight of the base film, the environment-friendly requirements that the product is easy to recycle and easy to use at a high value are met.

Description

technical field [0001] The invention relates to the field of polypropylene films, in particular to a biaxially oriented polypropylene base film with high surface energy. The surface energy of this polypropylene base film can reach 38 dynes / cm and above. Background technique [0002] The difficulty of recycling and reusing waste plastics, especially functional flexible packaging, is an urgent problem that is highly concerned by the world. The design concept of high-barrier functional single material is the preferred direction for the development of new flexible packaging materials in the world. [0003] Commercially available high-barrier functionalized films usually use polyester film as the base film, using the good polarity of the polyester material to meet the sufficient adhesion and durability between the base film and the barrier coating and barrier vapor deposition layer to obtain stable , controllable, long-lasting barrier properties. [0004] Polypropylene is a no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/30B32B27/08B32B27/06B32B27/32B32B27/34B32B27/40C08L23/12C08L23/14C08L23/06C08L23/08C08J5/18
CPCB32B27/306B32B27/08B32B27/30B32B27/327B32B27/32B32B27/34B32B27/308B32B27/40B32B27/065B32B5/18C08J5/18B32B2250/05B32B2266/025C08J2323/12C08J2423/14C08J2423/06C08J2323/08
Inventor 夏琪俞晓琴俞春良徐涛夏嘉良高学文
Owner KUSN JIAPU PACKING MATERIAL
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