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Preparation method for lamination blocking type package materials

A packaging material and barrier technology, which is applied in the field of preparation of laminated barrier packaging materials, can solve the problems of high surface state and fiber morphology, and achieve the effects of reducing the difficulty of degradation, lowering requirements, and reducing difficulty in recycling

Active Publication Date: 2013-11-13
GREATVIEW BEIJING TRADING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For this reason, there are two technical problems to be solved by the present invention, one is to directly prepare the printing surface and supporting layer with cardboard, which will have high requirements on the surface state and fiber shape of the cardboard itself; the other is to reduce the waste of aluminum foil , avoiding the environmental problems caused by the difficult degradation and recycling of aluminum foil

Method used

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  • Preparation method for lamination blocking type package materials

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Effect test

preparation example Construction

[0026] A preparation method of a laminated barrier packaging material, the preparation method is as follows:

[0027] Step 1: Extrude coating on at least one side of the substrate of the support layer, and at the same time perform surface treatment on the substrate of the substrate after coating;

[0028] Step 2: Coating the barrier coating solution on the surface of the film in step 1, and drying to obtain a barrier layer;

[0029] Step 3: extruding a composite heat-sealing layer on the outer surface of the prepared barrier layer;

[0030] Step 4: compound a light-shielding layer on one side of the support layer base material in step 1, and make the surface tension reach more than 38 dynes after pretreatment;

[0031] Step 5: Coating the printing layer coating solution on the outer surface of the prepared light-shielding layer, and drying to obtain the printing layer;

[0032] Step 6: extruding the protective layer on the outer surface of the printing layer to compound the ...

Embodiment 1

[0051] Such as figure 1 As shown, it includes a heat-sealing layer 8, an adhesive layer 5 tightly compounded on the heat-sealing layer 8 from bottom to top, a barrier layer, an adhesive layer 5, and a support layer 4, and the upper side of the support layer 4 is from bottom to top Covered with a light-shielding layer 3, a printing layer 2 and a protective layer 1 in sequence, wherein the printing layer 2 is a mixture of nano-alumina and polyvinyl alcohol, the weight ratio of nano-silicon oxide and polyvinyl alcohol is 1:5, and the weight ratio of nano-silicon oxide The specific surface area is 220m 2 / g, the degree of polymerization of polyvinyl alcohol is 3000, its degree of alcoholysis is 87%, the thickness of the printing layer 2 is 10um; the protective layer 1 is a polypropylene layer, the purpose is to protect the printing layer 2 from being scratched and damaged, the protective layer 1 has a thickness of 10um, and the light-shielding layer 3 includes a mixture of polyol...

Embodiment 2

[0053] structured as figure 1 Shown, wherein the difference with embodiment 1 is:

[0054] The protective layer 1 is a polyethylene layer, and the thickness of the protective layer 1 is 20um;

[0055] The printing layer 2 is a mixture of nano-silicon oxide and poly(meth)acrylic acid, the weight ratio of nano-silicon oxide and poly(meth)acrylic acid is 2:1, and the specific surface area of ​​nano-silicon oxide is 175m 2 / g, wherein the thickness of the printing layer 2 is 15um;

[0056] The light-shielding layer 3 includes polyolefin resin, carbon black and titanium dioxide, wherein carbon black is 10% of the light-shielding layer, titanium dioxide is 20% of the light-shielding layer, and the balance is polyolefin. Carbon black and titanium dioxide are mixed and co-extruded respectively. The thickness is 30um;

[0057] The support layer 4 is a biaxially stretched foamed polyester material, and the thickness of the support layer is 40um;

[0058] The thickness of the bonding...

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Abstract

The invention relates to a preparation method of laminated packaging material with barrier property. The preparation method comprises a step of performing a surface treatment method for two side surfaces of base materials with the barrier property to obtain a double-sided barrier layer; a step of compositing one side surface of a supporting-layer base material with one surface of the barrier layer in step 1 through extruding; and a step of compositing a protection layer with the other surface of the barrier layer in step 2, and compositing a heat-sealing layer with the other side surface of the supporting-layer base material. The supporting layer is composed with a light shielding layer and a printing layer, thereby reducing requirements of printing for cardboard, greatly improving resolution of images and reducing cost at the same time. By using a plasma method to process the barrier base material, the barrier layers, instead of aluminium foil, are formed at two side surface of the barrier base material, so that problems of difficult recovery and degradation caused by discharging of the aluminium foil can be reduced, and blocking rate of oxygen can be improved at the same time.

Description

technical field [0001] The invention relates to a preparation method of a packaging material, more specifically, to a preparation method of a laminated barrier packaging material. Background technique [0002] Aseptic packaging material is a multi-layer laminated packaging material, which is mainly composed of paper, plastic and aluminum foil. It has excellent oxygen and moisture barrier functions, so the food it packs, including liquid food, has a long shelf life. [0003] However, this multi-layer aseptic packaging material has its own limitations. First, it needs to use cardboard directly as the printing receiving surface and support layer, which has high requirements for the surface state and fiber morphology of the cardboard itself. Ordinary It is difficult for cardboard to meet the specific printing requirements, and papermaking consumes a lot of technical materials, and the chemicals used in papermaking are very harmful to the environment; secondly, it uses aluminum f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/06B32B27/30B32B27/18B32B33/00B32B7/10B65D65/40
CPCB32B27/08B32B27/20B32B27/32B32B27/34B32B27/36B32B2250/24B32B2307/7244B32B2439/70Y02W30/80
Inventor 不公告发明人
Owner GREATVIEW BEIJING TRADING CO LTD
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