Heat sealing type biaxial-tension polypropylene film

A polypropylene film, biaxially oriented technology, used in flexible coverings, packaging, layered products, etc., can solve the problems of high environmental protection requirements, high production costs, and reduced production costs.

Active Publication Date: 2009-05-13
HAINAN SHINER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]Aiming at the problem that the traditional food and drug composite packaging film cannot meet the high requirements of today's society for environmental protection, and the production cost remains high
The purpose of the present invention is to provide a new type of biaxially oriented polypropylene film with ultra-high heat-sealing strength. Sealing requirements, can be directly bagged for food, medicine and other packaging, replacing the current composite packaging materials used in some food, medicine, etc., greatly reducing production costs while solving the environmental protection problems of traditional composite packaging films

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0018] Embodiment one: adopt co-extrusion process to produce 35 micron BOPP film, wherein add 47% ternary copolymerization polypropylene, 50% propylene-butene copolymer and 3% siliceous lime and erucic acid in 1 surface layer of BOPP film Amide anti-blocking slip agent (effective content is 1500PPM), the extruded thickness of the surface layer is 2 microns, forming a heat-sealing layer 1; adding 15% propylene-butene copolymer and 85% homopolymer Propylene forms the core layer 2; and corona treatment is carried out on the non-heat-sealing layer 3, and the treatment value of the day is 41 dynes, and the prepared BOPP film has good heat-sealing performance. Its heat sealing strength is 9N / 15mm at 0.3 seconds.

Embodiment 2

[0019] Embodiment two: adopt co-extrusion process to produce 35 micron BOPP film, wherein all add 84% ternary copolymerization polypropylene, 13% propylene-butylene copolymer and 3% erucamide class antibacterial to the two surface layers of BOPP film Adhesive slip agent (effective content is 1500PPM), the extruded thickness of both surface layers is 3 microns, forming heat-sealing layer 4 and heat-sealing layer 6; Add 10% propylene-butylene copolymer and 90% The homopolypropylene forms the core layer 5; and corona treatment is performed on the two heat-sealing layers. Polyvinyl alcohol (PVOH) coating. The prepared BOPP film has excellent heat-sealing performance and ultra-high oxygen barrier performance. When the heat-sealing temperature is 130°C and the heat-sealing time is 0.3 seconds, its heat-sealing strength is 11N / 15mm; when the PVOH coating is 3um , at a relative humidity of 0%, and at 23°C, its oxygen transmission rate is ≤1.0ml / m 2 .24hr.

Embodiment 3

[0020] Embodiment three: adopt co-extrusion process to produce 35 micron BOPP films, wherein 25% binary copolymerized polypropylene, 60% terpolymerized polypropylene, 12% propylene-butene copolymer are added to 1 surface layer of BOPP film And 3% erucamide anti-blocking slippery agent (effective content is 1500PPM), the extruded thickness of this surface layer is 2 microns, forms heat-seal layer 7; Corona treatment is carried out to non-heat-seal layer 9, and the processing value of the same day is 41 Dyne, adding 15% propylene-butene copolymer and 85% homopolypropylene into the core layer to form the core layer 8; and coating the surface of the non-thermal layer 9 with a PVDC coating. The prepared BOPP film has good heat-sealing properties and oxygen and water vapor barrier properties. When the heat-sealing temperature is 130°C and the heat-sealing time is 0.3 seconds, its heat-sealing strength is 8N / 15mm; when the PVDC coating is 3um , at a relative humidity of 90%, and at 3...

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Abstract

A heat-sealing type two-way stretching polypropylene film is prepared by forming a heat-sealing layer with a heat-sealing strength on the surface layer of the two-way stretching polypropylene film by a co-extrusion process. The heat-sealing layer can be formed above or below the two-way stretching polypropylene film, or formed on both the upper and the lower surfaces of two-way stretching polypropylene film at the same time. The adopted heat-sealing material comprises mixing materials of heat-sealing type materials like biopolymer polypropylene or terpolymer polypropylene, propylene-butylene copolymer or known alkene copolymer and the like; heat-sealing materials like 3% to 60% of propylene butylene copolymer or known alkene copolymer and the like, or elastic body, 40% to 97% of homopolymerization polypropylene, and 1% to 20% of an anti-static agent are added to a core layer. The interface heat-seal package or the couple-seal package can be directly performed to the product without being compounded with the PE or CPP heat-sealing film; the surface of the product can be printed and coated, or coated after being printed according to the operating requirements; the product integrates package and decoration as a whole, and can replace partial composite products. The product has the remarkable advantage of low cost, and reduces the environmental pollution.

Description

Technical field [0001] The invention relates to a heat-sealing biaxially stretched polypropylene film. The product does not need to be compounded with heat-sealing films such as polyethylene or cast polypropylene, and can be directly packaged with seam-sealing heat-sealing or face-to-face packaging. The surface can be printed, coated or coated after printing. The product integrates packaging, The combination of decoration and decoration can replace some composite products, which has a significant low-cost advantage and reduces environmental pollution at the same time. Background technique [0002] At present, traditional packaging film materials basically need to be compounded with polyethylene or cast polypropylene with high heat-sealing strength to meet the heat-sealing requirements of packaging when they are used in food and pharmaceutical packaging, and the compounding process involves investment in equipment. The process of increasing and compounding the glue and solve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D65/40B32B27/32B32B27/18
Inventor 黎坛曾令丰谢文波
Owner HAINAN SHINER IND
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