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Laminate, packaging body, and packaged item

A technology of laminated body and substrate layer, which is applied in the types of packaged items, packaged food, special packaged items, etc., and can solve problems such as difficult procurement.

Pending Publication Date: 2019-10-29
TOPPAN PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to purchase polyacrylonitrile-based resin films stably, and it is necessary to find alternative materials for polyacrylonitrile-based resins

Method used

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  • Laminate, packaging body, and packaged item
  • Laminate, packaging body, and packaged item
  • Laminate, packaging body, and packaged item

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0134] A laminate including a base material layer, a barrier layer, an adhesive layer, and a sealant layer was produced by the following method.

[0135] First, as a base material layer, a biaxially stretched polyethylene terephthalate film having a thickness of 12 μm was prepared. Specifically, "FE2001" manufactured by Futamura Chemical Co., Ltd. was prepared. In addition, an aluminum foil having a thickness of 7 μm was prepared as a barrier layer.

[0136] Next, the anchor coating agent is applied to one main surface of the base layer, and then the base layer and the barrier layer are sandwich-laminated so that the main surface and the barrier layer face each other with the adhesive resin layer interposed therebetween. Here, polyethylene was used as a material of the adhesive resin layer, and its thickness was 15 μm.

[0137] Next, a polyurethane-based adhesive was applied on the surface of the barrier layer to form an adhesive layer so as to have a thickness of 0.5 μm.

...

Embodiment 2

[0154] A laminate was produced by the same method as in Example 1 except that the thicknesses of the first layer and the second layer were set to 25 μm and 5 μm, respectively. That is, in this example, the ratio of the thickness of the first layer to the thickness of the second layer is 5:1.

Embodiment 3

[0156] A laminate was produced by the same method as in Example 1, except that the thicknesses of the first layer and the second layer were 10 μm and 20 μm, respectively. That is, in this example, the ratio of the thickness of the first layer to the thickness of the second layer is 1:2.

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Abstract

A laminate 1 comprises a base material layer 11 and a sealant layer 15. The sealant layer 15 comprises: a first layer 15a including a cyclic olefin-based resin; and a second layer 15b interposed between the base material layer 11 and the first layer 15a and including a low-density polyethylene resin. The ratio between the thickness of the first layer 15a and the thickness of the second layer 15b is within the range 1:2-5:1. The low-density polyethylene resin has a melt flow rate (MFR) within the range of 3.6-13.0 g / 10 mins, at a temperature of 190 DEG C and a load of 21.168 N. The low-densitypolyethylene resin has a density within the range of 0.915-0.925 g / cm<3>. The thickness of the first and second layers is at least 5 [mu]m, respectively, and the thickness of the second layer is no more than 25 [mu]m.

Description

technical field [0001] The present invention relates to a laminate, a package, and a packaged article. Background technique [0002] In a laminate used as a packaging material or the like, a thermoplastic resin is used for the sealant layer. As this thermoplastic resin, polyethylene resin, polypropylene resin, etc. are used especially from the point which is excellent in lamination processability and heat-sealing property. [0003] However, although these resins can achieve high adhesive strength in heat sealing, they tend to adsorb components contained in foods, medicines, and the like. Therefore, a package containing a sealant layer made of these resins in such a manner as to come into contact with a space for accommodating the contents tends to cause deterioration or deterioration of the contents. [0004] Therefore, in laminated bodies used for packaging food, medicine, etc., polyacrylonitrile-based resin (PAN) as a non-adsorbent material is used for the sealant layer....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B15/085B32B15/20B65D65/40
CPCB32B15/085B32B15/09B32B15/20B32B27/08B32B27/32B32B27/325B32B27/36B32B2255/06B32B2255/10B32B2255/20B32B2255/205B32B2255/26B32B2307/30B32B2307/31B32B2307/582B32B2307/72B32B2307/7242B32B2307/7244B32B2439/70B32B2439/80B65D65/40B65D77/20
Inventor 小出洋子石田悟广瀬亮杉山祐树佐佐木野枝
Owner TOPPAN PRINTING CO LTD