Packaging member having surface with excellent liquid repellency

A liquid repellency and component technology, applied in special packaging objects, packaging, wrapping paper, etc., can solve the problem of inability to evaluate the water repellency or liquid repellency of multi-layer films, and achieve excellent liquid repellency and cost-effective effects.

Inactive Publication Date: 2020-11-10
TOYO SEIKAN GRP HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the water repellency or liquid repellency of multilayer films cannot be evaluated

Method used

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  • Packaging member having surface with excellent liquid repellency
  • Packaging member having surface with excellent liquid repellency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] (Preparation method of test sample)

[0089]A low-density polyethylene resin (manufactured by Japan Polyethylene Co. LJ8041) or polypropylene (J246M manufactured by Prime Polymer Co.) was melt-kneaded by using a kneader at a temperature higher than the melting point of the low-density polyethylene resin or polypropylene.

[0090] The kneaded product was pulverized by using an electric mill and shaped into a granular shape.

[0091] The pellets were heated and pressed by using an electric heat press, and formed into a film having a thickness of 100 μm.

[0092] The film thus formed was dry-laminated on a biaxially stretched PET film having a thickness of 12 μm via an adhesive to obtain a test sample, which was then stored in an electric oven set at a predetermined temperature within a predetermined time to allow the fluoropolymer to migrate.

[0093] (Evaluation method)

[0094] The water contact angles of the test samples before and after storage in an electric oven...

Embodiment 2

[0117] (Preparation method of test sample)

[0118] A low-density polyethylene resin (LJ8041) blended with 0.1 parts by mass of a fluoropolymer (AG-E060) was melt-kneaded at a temperature higher than the melting point of the polyethylene resin by using a kneader.

[0119] The kneaded product was pulverized by using an electric mill and shaped into a granular shape.

[0120] Install the cap mold on the injection molding machine. The pellets were charged into the hopper of the injection molding machine and injection molded into test sample caps at a barrel temperature set at 180°C.

[0121] Next, the test samples were stored capped in an electric oven set at 90° C. for 1 minute to allow migration of the fluoropolymer.

[0122] A test sample cap was fitted to a PET bottle prefilled with 300 mL of sauce (Delicious Sauce Tonkatsu manufactured by Kikkoman Co.) to obtain a test sample bottle.

[0123] (Evaluation method and result)

[0124] Tilt the test bottle to pour off the sa...

Embodiment 3

[0128] (Preparation method of test sample)

[0129] A low-density polyethylene resin (LJ8041) blended with 1.0 parts by mass of a fluoropolymer (AG-E060) was melt-kneaded at a temperature higher than the melting point of the polyethylene resin by using a kneader.

[0130] The kneaded product was pulverized by using an electric mill and shaped into a granular shape.

[0131] Install the nozzle mold for eye medicine on the injection molding machine. The pellets were charged into the hopper of the injection molding machine and injection molded into test nozzle samples at a barrel temperature set at 180°C.

[0132] Next, the test nozzle samples were stored for 1 minute in an electric oven set at 90°C to allow migration of the fluoropolymer.

[0133] The test nozzle sample was assembled into a PET eye drop container pre-filled with eye drops to obtain a test eye drop sample.

[0134] (Evaluation method and result)

[0135] A test eye drop sample is held in such a manner that th...

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Abstract

The purpose of the present invention is to provide a packaging member provided with a surface whereby peeling from the surface of a material exhibiting liquid repellency is effectively prevented, andthe surface also exhibits excellent liquid repellency without surface roughening, plasma treatment, vapor deposition, or other special means being performed. This packaging member is characterized byhaving a surface layer formed from a blend in which a fluorine-containing polymer is mixed in a substrate polymer, a concentration gradient of fluorine atoms in which more fluorine atoms are distributed on the surface than in the inside thereof being formed in the surface layer.

Description

technical field [0001] The present invention relates to a packaging member having a surface excellent in liquid repellency. Background technique [0002] In general, plastics are easier to form than glass, metal, etc., can be easily formed into various shapes, and thus are used in various applications. Among them, the packaging field using a container such as a bottle and a cap attached to the container is a representative field of use of plastics. [0003] Here, the container containing the liquid is inevitably accompanied by problems such as liquid dripping and liquid adhesion. Therefore, properties are required to allow the liquid to be smoothly discharged from the container without remaining in the container and to prevent the liquid from dripping along the outer wall surface of the mouth of the container. [0004] In addition, the same characteristics are required not only for containers, but also for packaging members applied to applications in contact with liquids, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D65/02B32B27/00B32B33/00C08L23/00C08L33/16C08L67/00C08L83/08C08L101/00
CPCB32B7/12B32B15/082B32B15/085B32B15/088B32B15/09B32B27/08B32B27/10B32B27/283B32B27/302B32B27/304B32B27/306B32B27/308B32B27/32B32B27/322B32B27/36B32B27/365B32B2250/24B32B2270/00B32B2307/518B32B2307/538B32B2307/7242B32B2307/73B32B2435/02B32B2439/46B32B2439/70C08G77/24C08L23/04C08L23/12C09D123/04C09D123/10C09D167/02C09D183/08C08L101/00C08L23/10C08L83/08C08L27/12B65D65/02B65D65/42B29C45/0001B29K2023/0633B29L2031/565B32B37/12B32B2439/06B65D65/40C08L33/16C08L67/00
Inventor 青谷正毅大贯隆司国则正弘木村谕男岩崎力
Owner TOYO SEIKAN GRP HLDG LTD
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