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Biaxial tension co-extrusion high-obstruct base material membrane and process for preparing the same

A technology of biaxial stretching and substrate film, which is applied in the field of plastic molding materials, can solve the problems of high manufacturing cost, achieve the effects of extended shelf life, good heat sealability, and resource protection

Inactive Publication Date: 2006-02-15
朱春蕾 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Extruded by multiple extruders, the layers are melted and bonded through the annular die and co-extruded. The production cost of this film is high.

Method used

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  • Biaxial tension co-extrusion high-obstruct base material membrane and process for preparing the same
  • Biaxial tension co-extrusion high-obstruct base material membrane and process for preparing the same
  • Biaxial tension co-extrusion high-obstruct base material membrane and process for preparing the same

Examples

Experimental program
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Effect test

Embodiment 1

[0040] figure 1 It is a block diagram of the preparation method and process of the biaxially stretched multilayer co-extruded high-barrier substrate film of the present invention. Generally, more than three extruders extrude several different resins, enter the machine head for composite co-extrusion, and then Longitudinal and transverse stretching and heat setting are carried out separately or simultaneously to obtain the biaxially stretched multilayer co-extruded high-barrier substrate film of the present invention.

[0041] see figure 2 Left label, cross-sectional view of the five-layer structure of the present invention, the two outer layers (layer A) are heat-sealing layers, which are made of LLDPE resin of 1018CA brand of Exxon Company of the United States, and the barrier layer C is made of nylon PA6 / 66 resin, made by BASF of Germany The brand produced by the company is C35EN, or 5034FDX40 of Ube, Japan, and the two layers of adhesive resin layer B adopts the ethylene-...

Embodiment 2

[0047] The same is a 5-layer structure, and the substrate film of the present invention can also be an asymmetric structure, see figure 2 The label on the right side, layer A is the first heat-sealing layer, the resin is made of PP resin with brand name HF400 of South Korea’s Samsung Company, the barrier layer C is made of German BASF C35FN or Japan’s Kuraly Company’s EVOH resin, brand G156B, and the adhesive resin is made of Japan’s Mitsui & Co. The adhesive resin produced, the second heat-sealing layer E is LDPE with the brand name FN810 of South Korea’s Samsung Company, and the film structure of the barrier substrate is an asymmetric A / B / C / D / E layered structure, wherein the materials of B and D are The production is the same, that is, the film is formed according to the structure of the material PP-HF400 / 571 / G156B (or C35FN) / 571 / N810LDPE, and the ratio of various materials is 10-25wt% / 5-10wt% / 5-45wt% / 5-10wt % / 10-25wt%, this ratio can also be thickness. See Example 1 for s...

Embodiment 3

[0050] Resin selection is the same as Example 1 or Example 2, the structure is three-layer barrier layer PA6 / 66 / adhesive layer ethylene-ethyl acrylate copolymer resin / heat-sealing layer LLDPE, the ratio of each layer is 20-60% / 5-15% / 20 -60%. Such as Figure 4 shown. Others are the same as embodiment 1.

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Abstract

This invention provides biaxial tension coextrude resistive base material membrane and preparation method. Wherein, the membrane comprises at least a resistive layer that is at least one of PA, PVA, PVDC and MAD6, a splice layer belonged to EAA, EEA, ethylenemethacrylic acid copolymerized resin or polyolefin and neolyn resin that can combine the other tow layers, and a heat-sealing layer that is at least one of the polyolefin resin, EVA and PET; besides, there is nano inorganic material in resistive layer and or heat-sealing layer to improve performance. The product fits to package for all kinds goods.

Description

technical field [0001] The invention relates to a plastic molding material, in particular to a biaxially stretched co-extruded high-barrier substrate film and a preparation method thereof. Background technique [0002] Plastic flexible packaging film is a commonly used packaging material for food, medicine and other products with high shelf life and high shelf life. There are mainly biaxially oriented polymer films, such as BOPP (biaxially oriented polypropylene), BOPET (biaxially oriented polyethylene terephthalate), BOPA (biaxially oriented polyamide), BOPS (biaxially oriented Styrene) and other single-material films, or PP, PE, PET and other diamond-coated films, silicon-coated films; and film materials such as PP, LDPE, EVA, PVDC, PA, and PVC. These products played a huge role in people's lives in the early days. In order to improve product performance, in recent years, composite packaging films such as BOPP / aluminum platinum / PET / LDPE, BOPP / CPP or / LLDPE, and BOPET / PA / ...

Claims

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Application Information

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IPC IPC(8): B23B27/08
Inventor 朱春蕾朱春英朱鹏涛王辉才许波
Owner 朱春蕾
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