Liquid-repellent plastic molded body and production method therefor

A production method and technology of shaped bodies, applied in the direction of chemical instruments and methods, pollution prevention methods, cleaning methods and appliances, etc., can solve the problems of unsuitable packaging materials, etc., and achieve the effect of stable maintenance and stable liquid repellency

Inactive Publication Date: 2021-05-14
TOYO SEIKAN GRP HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technology is suitable for nozzle plates for inkjet heads made of silicone, etc., it is completely unsuitable for the field of packaging materials in terms of cost, productivity, etc.
In addition, Patent Document 3 does not consider, for example, the lifetime of liquid repellency in a state where viscous liquid is continuously in contact with

Method used

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  • Liquid-repellent plastic molded body and production method therefor
  • Liquid-repellent plastic molded body and production method therefor
  • Liquid-repellent plastic molded body and production method therefor

Examples

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Embodiment Construction

[0062] will refer to figure 1 A description is given of the principle of liquid repellency by means of a rough surface (concave-convex surface). In the Cassie mode where a droplet is placed on the rough surface 100, the recesses in the rough surface 100 act as air pockets so that the droplet is in recombined contact with the solid and gas (air). It is known that composite contacts achieve high liquid repellency because the radius R of the liquid droplet on the contact interface is small, and the liquid is in contact with air, which is the most hydrophobic substance. Specifically, the apparent contact angle θ* is close to 180°.

[0063] On the other hand, in the case of a droplet intruding into a recess in the rough surface 100 shown as a Wenzel mode, the droplet is not in recombination contact, but only in contact with the solid. In the Wenzel mode, the contact radius R of the droplet on the contact interface is large, and the apparent contact angle θ* is similarly close to...

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Abstract

A liquid-repellent plastic molded body 1 according to the present invention has a liquid-repellent surface, and is characterized in that the liquid-repellent surface has a reentrant structure surface formed by arrangement of pillars 20 each having a head part 20a having a larger diameter, and that at least a part of the reentrant structure surface has a fluorine-containing surface in which fluorine atoms are distributed.

Description

technical field [0001] The present invention relates to a plastic molded article having a surface excellent in liquid repellency, and a method for producing the same. Background technique [0002] Plastics, which are generally easier to shape than glass, metal, etc., can be easily formed into various shapes, and thus they are used in various applications. Among them, the field of packaging containers such as bag-shaped containers and bottles is a representative field of use of plastics. [0003] Meanwhile, in the case of a container containing a viscous fluid as described above, it is required to have dischargeability. More specifically, a container to contain a viscous fluid needs to allow the contents to be discharged quickly and completely without sticking and remaining inside the container. [0004] In order to improve the discharge property with respect to the viscous fluid, the plastic surface forming the inner surface of the container is given high liquid repellency...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C59/02
CPCB29C2059/028B29C59/022B29K2995/0093C09D5/1681C09D5/1656B05D3/10B05D5/083B05D3/145B05D1/10B05D1/14B05D2201/00B05C19/002B05B5/032B05B5/001B05B5/081B05B5/084B29C2035/0838B29C59/14B65D33/005B08B17/065B29C59/02C09D201/04C23C16/50B29K2027/12B29L2031/712
Inventor 岩崎力青谷正毅大贯隆司国则正弘
Owner TOYO SEIKAN GRP HLDG LTD
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