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Ultra-low temperature heat sealing polypropylene casting film

A polypropylene casting and polypropylene technology, applied in the field of packaging film products, can solve the problems of narrow heat sealing temperature range, high heat sealing temperature, poor heat sealing performance, etc., so as to improve production efficiency and reduce initial heat sealing temperature. , the effect of reducing the scrap rate

Inactive Publication Date: 2010-03-03
湖北慧狮塑业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention mainly solves technical problems such as high initial heat-sealing temperature, narrow heat-sealing temperature range, and poor heat-sealing performance existing in the existing films used in the packaging field.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: 100 parts by weight of polypropylene homopolymer (5 kilograms per part, the same below), 0.5 parts of silicon dioxide are mixed uniformly and put into the first extruder hopper of cast film production line; 100 parts of polypropylene homopolymer, 5 parts of styrene-ethylene-butylene-styrene block copolymer (SEBS), and 0.5 parts of oleic acid amide are evenly mixed and put into the second extruder of the cast film production line In the hopper: 50 parts of polypropylene random copolymer (containing 93wt% of propylene molecules and 7wt% of ethylene molecules), 50 parts of ethylene-propylene elastomers, 0.5 parts of silica powder, and 0.1 parts of oleic acid amide by weight , mixed and put into the hopper of the third extruder; the molten material from the three extruders is extruded through a material collector and a T-shaped die, and then cooled and shaped, the outer layer is treated with corona, and trimmed, that is A film article according to the inventio...

Embodiment 2

[0022] Embodiment 2: 100 parts by weight of polypropylene homopolymer and 0.4 part of silica powder are evenly mixed and put into the first extruder hopper of cast film production line; 100 parts by weight of polypropylene homopolymer 3 parts, 3 parts of styrene-ethylene-butylene-styrene block copolymer (SEBS), 0.4 part of oleic acid amide mixes and puts into the second extruder hopper of cast film production line; Propylene random copolymer (containing 97wt% propylene molecule and 3wt% ethylene molecule) 60 parts, 40 parts of ethylene-propylene elastomer, 0.3 part of silicon dioxide powder, 0.3 part of oleic acid amide, put into the third extruder after mixing In the discharge hopper; the molten material from the three extruders passes through the material collector, extruded by the T-shaped die, and then cooled and shaped, the outer layer is treated with corona, and the edge is trimmed, that is, the heat-sealed layer and the core layer are obtained. and corona layer of the f...

Embodiment 3

[0023] Embodiment 3: 100 parts of polypropylene homopolymers by weight, 0.3 parts of silicon dioxide are mixed uniformly and put into the first extruder hopper of cast film production line; 100 parts of polypropylene homopolymers are mixed by weight , 5 parts of styrene-ethylene-butylene-styrene block copolymer (SEBS), and 0.3 part of oleic acid amide are evenly mixed and put into the second extruder hopper of cast film production line; 70 parts of random copolymer (containing 94wt% propylene molecule and 6wt% ethylene molecule), 30 parts of ethylene-propylene elastomer, 0.3 part of silica powder, 0.5 part of oleic acid amide, mixed and put into the third extrusion In the machine hopper; the molten material from the three extruders passes through the material collector, extruded from the T-shaped die, and then cooled and shaped, the outer layer is treated with corona, and the edge is trimmed, that is, the heat-sealing layer, core layer and Thin Film Articles of the Invention w...

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Abstract

The invention relates to an ultra-low temperature heat sealing polypropylene casting film which is formed by casting, co-extruding and compounding a heat-sealing layer, a polypropylene core layer and a polypropylene corona layer, wherein the heat-sealing layer is mainly prepared from the following components: 10-80 portions of polypropylene random copolymer, 20-90 portions of polyolefine elastomer, 0.1-0.5 portion of slipping agent and 0.1-0.5 portion of anti-blocking agent. By optimally designing the contents of various components of heat sealing material, the invention effectively reduces the initial heat sealing temperature of a packing film and widens the heat sealing temperature range. After being put into production, the ultra-low temperature heat sealing polypropylene casting film can improve the speed of packing and making bags, ensure the sealing performance of the bags and simultaneously reduce the scrape rate of making bags, thereby the production efficiency of application manufacturers can be greatly improved. The ultra-low temperature heat sealing polypropylene casting film can be widely applied to quick and automatic package of foods, medicines, textiles and other articles and particularly has advantages in the automatic packing filed with high requirement on air tightness.

Description

technical field [0001] The invention relates to a packaging film product, in particular to an ultra-low temperature heat-sealing polypropylene casting film. Background technique [0002] Among the plastic bag products for packaging, heat-sealed bags have developed rapidly due to their various appearances, fast production, and cost savings, and are widely used in the packaging fields of daily chemical products and pharmaceutical products. With the improvement and development of packaging technology, packaging materials are also changing with each passing day. At present, most of the heat-sealing bags for packaging are composite films, such as aluminum-plastic composite films, plastic-plastic composite films, and paper-plastic composite films. Composite films generally consist of three layers, the outer layer is the printing layer, and the core layer is Barrier layer, inner layer is heat seal layer. In the heat-sealing process, the most important thing is the heat-sealing pr...

Claims

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Application Information

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IPC IPC(8): B32B27/18B32B27/32C08L23/12B65D65/40
Inventor 王焕清罗建明吴朋袁向华卢长伟曾志明伍冬瑞
Owner 湖北慧狮塑业股份有限公司
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