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Multilayered film and container

A multi-layer film and container technology, applied in the direction of containers, medical containers, flexible containers, etc., can solve the problems of thin film thickness and pinholes, and achieve pinhole prevention, good heat resistance, flexibility and transparency. good effect

Inactive Publication Date: 2002-01-09
OTSUKA PHARM FAB INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, if figure 2 As shown, the film 22 has a large bend at the adjacent portion of the inlet member 20, so when using a conventional multilayer film for heat sealing, the film stretches at the bent portion 24, the film thickness becomes thinner, and pinholes may occur.

Method used

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  • Multilayered film and container
  • Multilayered film and container
  • Multilayered film and container

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5、 comparative example 1～4

[0114] (manufacture of multilayer film)

[0115] Using the above-mentioned resins (mixed resins) of A-1, B-1, C-1 to C-4 and D-1, films having layer configurations shown in Table 1 below were formed by a water-cooled co-extrusion inflation method.

[0116] In addition, the multilayer film of Comparative Example 2 has no four-layer film corresponding to the third layer.

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PUM

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Abstract

A multilayered film comprising five layers in which the first, third and fifth layers are made of an ethylene . alpha -olefin copolymer having a density of 0.930 to 0.950 g / cm<3> and the second and fourth layers are made of a mixed resin comprising 35 to 55% by weight of polypropylene having a density of 0.900 to 0.930 g / cm<3>, 40 to 60% by weight of ethylene . alpha -olefin elastomer having a density of 0.860 to 0.900 g / cm<3>, and 2 to 8% by weight of high-density polyethylene having a density of 0.955 to 0.970 g / cm<3>; and a container made of the film (bag for infusion fluid, etc.) . The multilayered film and the container are useful in medical applications.

Description

technical field [0001] The present invention relates to a multilayer film and a container formed using the film. More specifically, the present invention relates to a multilayer film and a container thereof which are used particularly as a material for containing liquid medicine, blood, etc. in the medical field. Background technique [0002] In order to improve the properties of medical flexible plastic containers such as infusion bags, attempts are being made to use multilayer films as raw materials. Existing medical multilayer containers can be made of, for example, the following polyethylene-based resins. 1) JP-A-62-64363 Gazette [0003] Made of linear low-density polyethylene, the density of the inner and outer layers is 0.920g / cm 3 The density of the above and middle layers is less than 0.920g / cm 3 3-ply bag. 2) Japanese Patent Laid-Open No. 63-286333 [0004] Three layers of linear low-density polyethylene, the density of the inner and outer layers is 0.910~0.94...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D30/02A61J1/00A61J1/05B29C65/00B29C65/02B32B25/08B32B27/00B32B27/32B65D33/36C08L23/04C08L23/06C08L23/08C08L23/10
CPCA61J1/10B29C65/02C08L23/10B29C66/71B29L2031/7148B29C66/919A61M2207/00B29C66/53262B29C66/532B29C66/024B29K2023/06C08L23/06C08L23/0815B32B27/32B29C66/9141B29C66/91645Y10T428/1352Y10T428/27Y10T428/24992Y10T428/1393Y10T428/31938Y10T428/31909Y10T428/31946Y10T428/31913B29C66/723B29C66/7313B29C66/1122B29C66/43C08L2666/04B29K2023/08B29K2021/003B29K2023/065B29K2023/12B32B27/08B32B2323/043B32B2323/10B32B2323/04B32B2439/80B32B2309/105B29C65/00
Inventor 片冈完传宝孝之须崎元晶田中达也樫山薰明
Owner OTSUKA PHARM FAB INC
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