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Surface treatment of molded resin products

A technology of surface treatment and resin mold, applied in the direction of pretreatment surface, device for coating liquid on the surface, coating, etc., can solve the problems of molded product deformation, difficult surface treatment state, unsuitable for chemical modification treatment method, etc. , to achieve the effect of high-precision size, beautiful printing and coating

Inactive Publication Date: 2008-11-19
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the existing chemical treatment methods have the disadvantages of being too expensive and requiring large-scale equipment
[0007] In addition, with the existing processing methods, it is difficult to obtain a uniform surface treatment state when the resin molded product has a complex shape such as a cylinder or a cylinder.
In addition, it is difficult to control the processing conditions, and the required sufficient adhesive strength of coatings cannot be obtained.
[0008] Also, molded articles are deformed due to heat generated during handling
Especially for delicate molded products that require high dimensional accuracy, it is not suitable to use the existing chemical modification treatment method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0047] The following are specific examples (Example 1-Example 6) of the surface treatment method of the present invention, wherein the evaluations of the printing adhesion strength, the degree of deformation of the resin molded product, and the gloss of the printed surface are shown in Table 1. . In Table 1, Comparative Examples 1 to 7 are also shown for comparison therewith.

[0048] Table 1

[0049] processing time

(Minute)

ten point average rough

Roughness (μm)

Printing Adhesion Strength

Number of remaining grids / 100

evaluate ※

Deformation evaluation

Gloss evaluation

Example 1

9

10.0

100 / 100

○

○

○

Example 2

10

13.0

100 / 100

○

○

○

Example 3

12.5

14.5

100 / 100

○

○

○

Example 4

15

15.0

100 / 100

○

○

○

Example 5

20

18.0

100 / 100 ...

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PUM

PropertyMeasurementUnit
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Abstract

The invention aims to provide a surface treatment method for a resin molded product enhancing adhesion strength of a printing ink or a coating in the surface of the resin molded product having hardly printing property or hardly coating property and not impairing dimensional precision of the resin molded product. The resin molded product having the hardly printing property or the hardly coating property, a polishing stone and water are thrown into a treatment vessel and are made to flow in a form of whirlpool and the resin molded product and the polishing stone are made to collide. Thereby, roughening of ten-point average roughness of surface of the resin molded product is carried out to 10 [mu]m-40 [mu]m.

Description

technical field [0001] The present invention relates to a method for surface treatment of resin molded articles which are difficult to print and apply. Background technique [0002] For resin molded products such as polyoxymethylene molded products that are difficult to print and coat, when printing and coating the surface, the current method is to activate the surface of the resin molded product in advance. [0003] For this surface treatment, because conventional mechanical surface treatment methods such as sandpaper treatment cannot obtain sufficient adhesive strength of paint, etc., corona discharge treatment, short-wave ultraviolet treatment, plasma etching treatment, and frame treatment are used. The surface is chemically modified (for example, refer to Non-Patent Document 1). [0004] [Non-Patent Document 1] Polyplastics, Technical Support, [online], 2002, [retrieved on August 20, 2003], Internet: [0005] <URL: http: / www.polyplastics.com / jp / support / tech / treat / Te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C59/02B29K59/00B29K61/00B05D3/12B05D7/02C08J7/00
Inventor 滨田明彦木村昭孝
Owner SUMITOMO RUBBER IND LTD
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