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PET (Polyethylene Terephthalate) composite packaging material and preparing method thereof

A composite packaging material and composite film technology, which is applied in the field of PET composite packaging materials and its preparation, can solve the problems of non-environmentally friendly residual solvents, numerous processes, and the need for glue, etc., achieve a clean peeling interface, meet safety and hygiene requirements, and reduce waste of resources Effect

Inactive Publication Date: 2014-12-31
SEALED AIR CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The above-mentioned composite process has the following disadvantages: 1. There are many procedures, high cost, and glue compounding is required; 2. Both the separate preparation of PET and the composite film need to be cut, and both steps need to be left and cut off, resulting in a lot of waste; 3. , glue is required, not environmentally friendly and there is a risk of excessive residual solvents

Method used

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  • PET (Polyethylene Terephthalate) composite packaging material and preparing method thereof
  • PET (Polyethylene Terephthalate) composite packaging material and preparing method thereof
  • PET (Polyethylene Terephthalate) composite packaging material and preparing method thereof

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preparation example Construction

[0117] For preparing the PET composite packaging material that is provided with the composite film of above-mentioned preferred embodiment, adopt following preparation method, comprise:

[0118] (1) forming a molten adhesive layer by an extruder A;

[0119] The technical details of the adhesive layer are consistent with the above, and will not be repeated here.

[0120] (2) forming the functional layer in molten state by extruder B;

[0121] The thickness of the functional layer is preferably 3-80 μm. More preferably, the thickness of the functional layer is preferably 5-70 μm.

[0122] The functional layer can be a PE layer, an easy-to-tear layer, or a barrier layer, or it can be a nylon layer that increases the puncture resistance of the film, or it can be any layer between the PE layer, barrier layer, nylon layer, and easy-to-tear layer. combination, and is not limited to this. Wherein, the barrier layer is an EVOH barrier layer or a PVDC barrier layer, and the barrier ...

Embodiment 1

[0139] see figure 1 , the present invention provides a first embodiment of a PET composite packaging material, which includes a PET sheet 1 and a composite film 2 compounded on the surface of the PET sheet 1 from top to bottom, the thickness of the PET sheet 1 is 400 μm, and the composite film 2 has a thickness of 50 μm, wherein the composite film 2 includes an adhesive layer 21, a functional layer 22, and a heat-sealing layer 23, the adhesive layer 21 is composed of ethylene-ethyl acetate copolymer (EVA), and the thickness is 10 μm, and the functional layer 22 It is a PE layer with a thickness of 25 μm, and the thickness of the heat-sealing layer 23 is 15 μm.

[0140] Its preparation process is as follows:

[0141] 1. Prepare a composite film consisting of an adhesive layer, a functional layer and a heat-sealing layer

[0142] The molten adhesive layer, PE layer and heat-sealing layer are respectively formed by the extruders A, B, and C, and the molten adhesive layer, PE la...

Embodiment 2

[0148] see figure 2 , the present invention provides a second embodiment of a PET composite packaging material, which includes a PET sheet 1 and a composite film 2 compounded on the surface of the PET sheet 1 from top to bottom, the thickness of the PET sheet 1 is 300 μm, and the composite film 2 has a thickness of 50 μm, wherein the composite film 2 includes an adhesive layer 21, a functional layer 22 and a heat-sealing layer 23, the adhesive layer 21 is composed of ethylene-ethyl acetate copolymer (EVA), and the thickness is 5 μm, and the functional layer 22 It includes an adhesive layer 22A, a barrier layer 22B and an adhesive layer 22C, the thickness of which is 25 μm, and the thickness of the heat-sealing layer 23 is 20 μm.

[0149] Its preparation process is as follows:

[0150] 1. Prepare a composite film consisting of an adhesive layer, a functional layer and a heat-sealing layer

[0151]The adhesive layer 21, adhesive layer 22A, barrier layer 22B, adhesive layer 22...

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Abstract

The invention discloses a PET (Polyethylene Terephthalate) composite packaging material specially used for food packaging. The PET composite packaging material comprises a PET sheet material and a composite film compounded on the surface of the PET sheet material, wherein the composite film comprises a bonding layer, and the PET sheet material is bonded with the bonding layer; the bonding layer is made from an ethylene copolymer, and the comonomer of the ethylene copolymer is ethyl acetate, acrylate or maleic anhydride. Correspondingly, the invention further discloses a method for preparing the PET composite packaging material. The bonding layer is directly bonded with the PET sheet material, so that the glue laminating procedure is reduced, no solvents are left, the cost is lowered, resource wastes are reduced, and environmental pollution caused by glue laminating is further avoided.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to a PET composite packaging material and a preparation method thereof. Background technique [0002] The traditional process is that the PET sheet is combined with the composite film through a dry composite process. The so-called dry lamination process is the process of coating the adhesive on a layer of film, drying it in an oven, and then hot-pressing another layer of film to form a composite film, which specifically includes: [0003] 1) Deployment of adhesive [0004] In order to obtain the best comprehensive performance and bonding performance of the composite product, for the two-component adhesive, the ratio of the main agent and the curing agent must be carried out in accordance with the product instructions provided by the manufacturer. When preparing the operation, first weigh the main agent, curing agent and ethyl ester according to the requirements, then p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/36B32B27/32B65D65/40
Inventor 张东宁段灿勇
Owner SEALED AIR CHINA
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