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Retortable cast film and production method thereof

A production method and casting film technology, applied in the direction of chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the problems of wasting materials, not being environmentally friendly, and low production efficiency, so as to reduce processing procedures and avoid Waste of resources and the effect of improving production efficiency

Inactive Publication Date: 2016-11-09
朝阳佛瑞达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Retort-resistant cast film is widely used in the packaging of products that require high-temperature sterilization, such as meat and food, while traditional composite structure packaging materials require special materials (PA) to be biaxially stretched after extrusion, and then go through the next process. Extruding and casting CPP film with adhesive to form a heat-sealing layer, the production process is complicated, the production efficiency is low, and it is a waste of materials, which is not environmentally friendly

Method used

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  • Retortable cast film and production method thereof
  • Retortable cast film and production method thereof
  • Retortable cast film and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A method for producing retort-resistant cast film, the steps of the production method are:

[0045](1) Preparation and weighing of raw materials: Prepare raw material particles according to the composition of the eleven-layer structure of the cast film, and send the raw material particles into the corresponding feeding hopper 12 through a suction device and a weighing device;

[0046] (2) Extruder 13 shear heating: ten extruders 13 respectively shear and heat the raw material particles in the hopper 12 to obtain raw materials in a molten state, and transport them to the aggregate block 14 through the interface;

[0047] (3) Aggregate block 14: The aggregate block 14 is provided with four heating zones, the temperatures are: 240°C, 240°C, 240°C, 240°C; After the raw materials are processed, they enter the aggregate block 14, and the aggregate block 14 distributes the raw materials extruded by the extruder 13 to form an eleven-layer product structure required by the proce...

Embodiment 2

[0068] The casting film prepared by the preparation method of Example 1 has a total of eleven layers, and from top to bottom are the first PA layer 1, the second adhesive layer 2, the third PP layer 3, and the fourth PP layer 4 , the fifth PP layer 5, the sixth PP layer 6, the seventh PP layer 7, the eighth PP layer 8, the ninth PP layer 9, the tenth PP layer 10 and the eleventh PP layer 11;

[0069] The thickness of the first PA layer 1 is 15 μm, the thickness of the second adhesive layer 2 is 5 μm, the thickness of the third PP layer 3 is 6 μm, the thickness of the fourth PP layer 4 is 5 μm, and the thickness of the fifth PP layer 5 is 6 μm , the thickness of the sixth PP layer 6 is 5 μm, the thickness of the seventh PP layer 7 is 5 μm, the thickness of the eighth PP layer 8 is 5 μm, the thickness of the ninth PP layer 9 is 11 μm, and the thickness of the tenth PP layer 10 is 11 μm , the thickness of the eleventh PP layer 11 is 7 μm.

[0070] The first PA layer 1 is a reinf...

Embodiment 3

[0072] The casting film prepared by the preparation method of Example 1 has a total of eleven layers, and from top to bottom are the first PA layer 1, the second adhesive layer 2, the third PP layer 3, and the fourth PP layer 4 , the fifth PP layer 5, the sixth PP layer 6, the seventh PP layer 7, the eighth PP layer 8, the ninth PP layer 9, the tenth PP layer 10 and the eleventh PP layer 11;

[0073] The thickness of the first PA layer 1 is 15 μm, the thickness of the second adhesive layer 2 is 10 μm, the thickness of the third PP layer 3 is 11 μm, the thickness of the fourth PP layer 4 is 12 μm, and the thickness of the fifth PP layer 5 is 12 μm , the thickness of the sixth PP layer 6 is 12 μm, the thickness of the seventh PP layer 7 is 12 μm, the thickness of the eighth PP layer 8 is 12 μm, the thickness of the ninth PP layer 9 is 20 μm, and the thickness of the tenth PP layer 10 is 20 μm , the thickness of the eleventh PP layer 11 is 14 μm.

[0074] Other parts are complet...

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Abstract

The present invention discloses a retortable cast film and a production method thereof and belongs to the technical field of production of cast films; the cast film includes eleven layers, including, sequentially from top to bottom: a first PA (polyamide) layer, a second adhesive layer, a third PP (polypropylene) layer, a fourth PP layer, a fifth PP layer, a seventh PP layer, an eighth PP layer, a ninth PP layer, a tenth PP layer and an eleventh PP layer. The cast film can tolerate retorting at a high temperature of 120 DEG C, is suitable for use in packaging the products requiring high-temperature sterilization, such as meat foods, is produced by co-extrusion technology with simple process and high production efficiency, and can form a novel packaging material having a different structure, clear layers, barrier function and heat-sealing function.

Description

technical field [0001] The invention belongs to the technical field of cast film production, and in particular relates to a retort-resistant cast film and a production method thereof. Background technique [0002] Retort-resistant cast film is widely used in the packaging of products that require high-temperature sterilization, such as meat and food, while traditional composite structure packaging materials require special materials (PA) to be biaxially stretched after extrusion, and then go through the next process. Extruding the cast CPP film with an adhesive to form a heat-sealing layer requires a complex production process, low production efficiency, and waste of materials, which is not environmentally friendly. [0003] The retort-resistant cast film adopts co-extrusion technology, and uses a variety of materials to co-extrude through the trapezoidal die head of the cast machine in the melted state after being plasticized in the extruder to form a film with different st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B27/08B32B27/32B32B27/34B32B33/00B32B37/10B32B38/00
CPCB32B27/08B32B27/32B32B27/34B32B33/00B32B37/10B32B38/0004B32B38/0008B32B38/0012B32B2307/31B32B2307/306B32B2307/7265B32B2439/70
Inventor 郭瑞林朱军
Owner 朝阳佛瑞达科技有限公司
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