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Primer-free coated biaxially oriented polypropylene film substrate

A technology of polypropylene film and biaxial stretching, which is applied in the direction of coating, layered products, synthetic resin layered products, etc., which can solve the problems of high environmental protection cost, difficult cost, and environmental pollution.

Active Publication Date: 2012-10-10
HAINAN SHINER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of environmental protection and / or high cost faced by the traditional biaxially oriented polypropylene film used as a coating substrate at present, the purpose of the present invention is to provide a new type of biaxially oriented polypropylene film coated with no primer Substrate, using this film as a coating substrate can save the pre-coating primer process and completely solve the environmental pollution and cost problems caused by the primer adhesive used in the traditional coating film production process

Method used

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  • Primer-free coated biaxially oriented polypropylene film substrate
  • Primer-free coated biaxially oriented polypropylene film substrate
  • Primer-free coated biaxially oriented polypropylene film substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A 10 micron biaxially oriented polypropylene film is produced by a co-extrusion process, in which 48% polypropylene homopolymer, 50% polyolefin plastomer and 2% siliceous lime are added to one surface layer of the biaxially oriented polypropylene film. Adhesive (effective content is 1000PP

[0016] M), the extrusion thickness of the surface layer is 1 micron, forming an affinity layer 1, and corona treatment is carried out to it, and the treatment value of the same day is 41 dynes; Adding 100% homopolypropylene in the core layer forms the core layer 2 Add 60% polypropylene homopolymer, 35% polyolefin plastomer and 5% siliceous lime anti-blocking agent (effective content is 2500PPM) to another surface layer, the extrusion thickness of the surface layer is 1 micron, forming an affinity Layer 3 and corona treated it with a treatment value of 41 dynes for the day.

Embodiment 2

[0017] Embodiment two: adopt co-extrusion technique to produce 25 micron biaxially stretched polypropylene film, wherein in 1 surface layer of biaxially stretched polypropylene film, add 50% polypropylene homopolymer, 48% polyolefin plastomer and 2% Containing silica lime anti-blocking agent (effective content is 1000 polypropylene M), the extruded thickness of this surface layer is 2 microns, forms affinity layer 4, and it is carried out corona treatment, and the same day treatment value is 41 dynes; Add 100% homopolypropylene in the layer to form the core layer 5; add 98% polypropylene homopolymer in another surface layer, 2% silicon-containing lime anti-blocking agent (effective content is 1000PPM), and the extrusion thickness of this surface layer is 2 microns to form a non-coated surface layer 6 .

Embodiment 3

[0018] Embodiment three: adopt co-extrusion process to produce 35 micron biaxially stretched polypropylene film, wherein in 1 surface layer of biaxially stretched polypropylene film, be added with 68% polypropylene homopolymer, 30% polyolefin plastomer and 2% Containing siliceous lime anti-blocking agent (effective content is 1000PPM), the extrusion thickness of this surface layer is 4 microns, forms affinity layer 7, and it is carried out corona treatment, and the treatment value of the day is 41 dynes; Add in core layer 100% homopolypropylene forms core layer 8; Add 50% polypropylene homopolymer, 45% polyolefin plastomer and 5% silica lime anti-blocking agent (effective content is 2500 polypropylene M) at another surface layer, The extruded thickness of the surface layer is 3 microns, forming the affinity layer 9, and corona treatment is carried out on it, and the treatment value of the day is 41 dynes.

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Abstract

The invention discloses a primer-free coated biaxially oriented polypropylene film substrate, which comprises an affinity layer (a coating surface), a core layer and a non-coating surface layer (one side without the affinity layer). The affinity layer (the coating surface) capable of being fused with polyvinylidene chloride, acrylic or modified polyvinyl alcohol and the like is formed on the biaxially oriented polypropylene film surface layer through the co-extrusion technology, wherein the extrusion thickness of the affinity layer is 1 to 10 microns; and the affinity layer can be on the upper surface or the lower surface of the biaxially oriented polypropylene film, and also can be on the upper and lower surfaces of the biaxially oriented polypropylene film simultaneously. The affinity layer is a mixed material comprising polypropylene homopolymer, polyolefin plastic body and antiblocking agent; the core layer consists of homopolymerized polypropylene; and the non-coating surface layer (one side without the affinity layer) is a mixed material comprising polypropylene homopolymer and antiblocking agent. By using the film as a coating substrate, the primer pre-coating process can be saved; and the problems of environmental pollution and cost caused by the used primer adhesives in the traditional coating film production process are solved radically.

Description

Technical field [0001] The invention relates to a biaxially stretched polypropylene film base material coated with no primer. Using this biaxially oriented polypropylene film as a coating substrate, polyvinylidene chloride or acrylic or modified polyethylene can be directly coated without pre-coating known adhesive primers such as polyurethane on the film substrate Alcohol and other top coatings, the prepared coating film also reaches the barrier properties such as oxygen (water vapor) barrier and / or heat sealing properties of the pre-coated primer coating film. The environmental pollution caused by the production process of the pre-coating primer is reduced, and the production cost of the product is reduced at the same time. Background technique [0002] When the traditional biaxially oriented polypropylene film is used as the substrate for coating, the surface of the substrate film is usually corona treated to a surface tension of 38-42 dynes, and then pre-coated with sol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/08B32B27/16B32B27/18C09D123/12C09D123/00C08L23/12
Inventor 黎坛赵红磊
Owner HAINAN SHINER IND
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