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Multilayer co-extrusion high-barrier film and preparation method thereof

A multi-layer co-extrusion, high-resistance technology, applied in the direction of chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve problems such as defects, complicated production processes, and unclear layers of packaging films, and achieve reduction Energy consumption, good oxygen barrier performance, no solvent residue effect

Active Publication Date: 2015-04-01
朝阳佛瑞达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The production process of traditional packaging film cannot prepare multi-layer co-extruded high barrier film
The traditional packaging film is made of biaxially stretched film or co-extruded film in the form of compounding with adhesives, which makes the layers of the traditional packaging film unclear and prone to residual solvents and other substances, which has an adverse effect on the quality and safety of the packaging film , and the traditional packaging film needs to go through a composite processing process, which makes the production process more complicated. If the operation of the composite process is not standardized, it will seriously affect the quality of the packaging film and easily produce defective products

Method used

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  • Multilayer co-extrusion high-barrier film and preparation method thereof
  • Multilayer co-extrusion high-barrier film and preparation method thereof
  • Multilayer co-extrusion high-barrier film and preparation method thereof

Examples

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Effect test

Embodiment 1

[0066] The technical solution adopted by the present invention is a production equipment for preparing multi-layer co-extruded high-barrier films, including a die head 19, which is a nine-layer co-extrusion die head 19, and the die opening 17 at the upper end of the die head 19 includes 9 annular extrusion dies. Outlet, the 9 extrusion ports are concentric circular structures; the side of the die head 19 is provided with 9 interfaces 18 that are respectively communicated with 9 annular extrusion ports, and each interface 18 is respectively communicated with the outlet of an extruder, extruding After the raw material is heated and melted, the extruder is supplied to the die head 19 for extrusion; the extruder includes a feeding port 20 and a heating zone, a feeding hopper 21 is arranged above the feeding port 20, and the heating zone includes a first heating zone 22 and a second heating zone. 23. The third heating zone 24, the fourth heating zone 25 and the fifth heating zone 26...

Embodiment 2

[0072] Adopt the production equipment of embodiment 1 to manufacture the preparation method of multi-layer co-extruded high barrier film, the steps of this preparation method are:

[0073] (1) Raw material preparation and weighing: Prepare raw material granules according to the components of the nine-layer structure of the multi-layer co-extruded high barrier film, and send the raw material granules into the corresponding extruder hopper 21 through the suction device and weighing mechanism ;

[0074] (2) Extruder shear heating: 9 extruders respectively shear and heat the raw material particles in the hopper 21 to obtain molten raw materials, which are transported to the die head 19 through the interface 18; each extrusion There are five heating areas in the machine, which heat the raw material particles in sequence;

[0075] (3) Extrusion and inflation of the die head 19: Extrude and fuse 9 layers of molten raw materials in the extrusion port of the circular die head 19, and ...

Embodiment 3

[0097] The multi-layer co-extrusion high barrier film prepared by the preparation method of Example 2, the multi-layer co-extrusion high barrier film has a nine-layer structure, from top to bottom are the first PA layer 1, the first adhesive layer 2. The first PE layer 3, the second adhesive layer 4, the EVOH barrier layer 5, the second PA layer 6, the third adhesive layer 7, the second PE layer 8 and the functional layer 9;

[0098] The thickness of the first PA layer 1 is 7um; the thickness of the first adhesive layer 2 is 20um; the thickness of the first PE layer 3 is 14um; the thickness of the second adhesive layer 4 is 20um; the thickness of the EVOH barrier layer 5 is 4um; The thickness of the layer 6 is 8um; the thickness of the third adhesive layer 7 is 20um; the thickness of the second PE layer 8 is 11um; the thickness of the functional layer 9 is 11um; the functional layer 9 is a heat-sealing layer.

[0099] The component of the first adhesive layer 2 comprises PE an...

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Abstract

The invention discloses a multilayer co-extrusion high-barrier film, a preparation method of the film and production equipment used by the preparation method. The multilayer co-extrusion high-barrier film has excellent oxygen barrier properties, tensile strength and high strength, the gradation is distinct, solvent residues are avoided, and the requirements on industrial products and food package can be met. According to the preparation method, a co-extrusion form is adopted, different materials are co-extruded in a molten state by virtue of a die head of a film blowing machine, the barrier film with distinct gradation is prepared, a composite processing technology is reduced, the problems such as solvent residues caused by compounding are solved, and the barrier film has the advantages of high efficiency and high yield. Moreover, the production equipment can be matched with the production method so as to perform high-efficiency production process, so that the barrier film has uniform film thickness, and high production efficiency and product quality are guaranteed.

Description

technical field [0001] The invention relates to a high-barrier co-extrusion film for packaging and a preparation method thereof, in particular to a multi-layer co-extrusion high-barrier film and a preparation method thereof, as well as production equipment used in the method. Background technique [0002] Multi-layer co-extruded high barrier film can effectively block oxygen and water due to its better barrier properties, effectively prolong the shelf life of products, and maintain the original flavor. It can be widely used and excellent in the field of industrial products and food packaging. use effect. [0003] The production process of traditional packaging film cannot prepare multi-layer co-extruded high barrier film. The traditional packaging film is made of biaxially stretched film or co-extruded film in the form of compounding with adhesives, which makes the layers of the traditional packaging film unclear and prone to residual solvents and other substances, which ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/26B29C47/06B29C47/08B29C47/86B32B27/08B32B27/30B32B27/32B32B27/34B32B7/12B29C48/335
Inventor 郭瑞林孙喜用朱军关成林张磊
Owner 朝阳佛瑞达科技有限公司
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