JP2017154289A - Surface processing resin molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surface processing resin molded article good in tactile at inexpensive price easily.SOLUTION: There is provided an embossed surface processing resin molded article 100 having embossed surface processing consisting of a first recess 101 arranged in a mesh-like pattern on a surface and a first protrusion 103 formed in an area surrounded by the first recess 101, the first protrusion 103 has a fine second protrusion 105 on a surface, the second protrusion 105 is randomly arranged on the surface of the first protrusion 103. Thereby the embossed surface processing resin molded article good in tactile can be formed at inexpensive price easily.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a surface-treated resin molded product, and particularly relates to one having a fine convex portion.

  A conventional surface-treated resin molded product will be described with reference to an interior product 1 shown in FIG. The interior product 1 is used, for example, on the surface of a console box of an automobile as a vehicle, the interior surface of a door, or the surface of an instrument panel.

  Such an interior product 1 is made of a resin such as PVC, TPU, or TPO, and has a plurality of convex curved surfaces 2 on the surface as shown in FIG. As shown in 4 (b), a plurality of fine protrusions 3 are formed uniformly. And this protrusion 3 satisfy | fills the conditions of (1)-(3) shown below.

(1) The height H of the protrusion 3 is 5 μm or more and 32 μm or less. (2) The ratio H / P between the height H of the protrusion 3 and the interval P between the protrusions 3 is in the range of 1/5 to 1/2, or the protrusion. The ratio H / W between the height H of 3 and the interval W between the recesses 5 formed between the projections 3 is in the range of 1/5 to 1/2. (3) The interval P between the projections 3 and the interval between the recesses 5 The interval W is the same (P = W)

  Note that the protrusion 3 described above has a hemispherical shape in which the sphere is approximately halved.

  By forming a plurality of such protrusions 3 on the surface of the interior product 1, the touch feeling when touched by a person is not moist, that is, not a smooth plastic or metal touch, It is not a rough tactile sensation like a wrinkle pattern, but seems to contain a certain amount of moisture and provide an appropriate friction feeling.

  The manufacturing process of the mold used when molding the interior product 1 will be described. However, in the following description, the reference is referred to based on the description of Patent Document 1 described later. First, a wooden mold 13 having the same surface shape as that of the interior product 1 is manufactured by NC machining using the machining tool 11. Subsequently, a skin 15 made of PVC or leather is stuck on the surface of the manufactured wooden mold 13.

  Note that particles 17 made of PP or acrylic having a particle diameter of about 30 μm are attached to the surface of the skin 15 with an adhesive in advance. As a method of adhering the particles 17 to the skin 15, a large amount of particles 17 are sprinkled on the skin 15 coated with an adhesive, and the excess particles 17 stacked on the adhesive of the particles 17 are used with a brush or a brush. Remove as you sweep.

  Thereafter, a concave mold 19 that substantially matches the surface shape of the wooden mold 13 is prepared. At this time, a protrusion 19 a is formed at the outer peripheral end of the concave mold 19, and this protrusion 19 a is formed on the wooden mold 13. A gap 21 is formed between the molds 19 and 13 by contacting the outer periphery of the molds 19 and 13. Then, liquid silicon 25 is discharged and filled into the gap 21 from the silicon discharge nozzle 23 to mold the surface shape (particles 17) of the wooden mold 13 (inversion of the product shape).

  When the filling of the silicon 25 into the gap 21 is completed and the silicon 25 is solidified, the wooden mold 13 having the particles 17 on the surface is removed from the concave mold 19. Then, fine concave portions 25a corresponding to the particles 17 shown in FIG. 5B are formed on the surface of the silicon 25 adhering to the surface of the mold 19.

  Next, a conductive material (any material that can deposit nickel) is poured into the surface of the silicon 25 to produce the basic mold 27. Thereafter, the fabricated basic mold 27 is removed.

  Subsequently, the above-described basic mold 27 is immersed in an electroforming tank 31 containing molten nickel 29, and a nickel layer 33 is laminated on the surface of the basic mold 27. By separating the nickel layer 33 from the basic mold 27, an electroforming mold 33A made of the nickel layer 33 is completed.

  Then, a product such as the interior product 1 is manufactured using the completed electroforming mold 33A (see Patent Document 1 above).

JP 2011-104987 A

  The interior product 1 described above has the following points to be improved. In the interior product 1, in order to manufacture a mold used for molding, the particles 17 are attached to a wooden mold, and the surface shape (particle 17) of the wooden mold 13 is molded using a concave mold 19. Then, a basic die 27 is produced using silicon 25, a nickel layer 33 is laminated on the surface of the basic die 27, and the nickel layer 33 is separated from the basic die 27, thereby generating an electroforming mold 33A composed of the nickel layer 33. . As described above, since the work is very complicated and time-consuming, the manufacturing cost is increased, and the manufacturing process takes time. As a result, the interior product 1 is expensive. .

  Therefore, an object of the present invention is to provide a surface-treated resin molded product that is inexpensive, easily, and has a good tactile feel.

  Means for solving the problems in the present invention and the effects of the invention will be described below.

  The surface-treated resin molded product according to the present invention is a surface-treated resin molded product having a surface treatment including a first concave portion and a first convex portion arranged on the surface, and at least the first convex portion. Has a fine second convex part on the surface, and the second convex part is randomly arranged on the surface of the first convex part.

  Thereby, a surface-treated resin molded article having a good tactile sensation can be easily formed at a low cost.

It is a figure which shows the cross-sectional outline of the embossed surface processed resin molded product 100 which is one Example of the surface processed resin molded product which concerns on this invention. FIG. 4 is a partially enlarged view of a textured surface processed resin molded product 100, where A is a first convex portion 103, and B is a second convex portion 105. FIG. It is a figure which shows the outline | summary of the sample test regarding the embossed surface processed resin molded product. It is a figure which shows the conventional surface treatment resin molded product.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  An embossed surface processed resin molded product 100 used for an interior product of an automobile, which is an embodiment of a surface processed resin molded product according to the present invention, will be described with reference to FIG. In FIG. 1, the schematic of the surface cross section of the embossed surface processed resin molded product 100 is shown.

  The resin molded product 100 has, on the surface, a first concave portion 101 arranged in a mesh shape and a first convex portion 103 formed in a region surrounded by the first concave portion 101. In addition, the 1st recessed part 101 and the 1st convex part 103 are formed by what is called a surface texture process.

  The 1st convex part 103 has the fine 2nd convex part 105 on the surface. The second convex portions 105 are randomly arranged on the surface of the first convex portion 103. Here, the second convex portion 105 is formed with a height of 22 μm to 28 μm and a pitch between adjacent second convex portions 105 of 150 μm to 170 μm. Similarly, the first concave portion 101 has the second convex portion 105.

  As shown in FIG. 2A, on the first convex portion 103 having a relatively wide and smooth plane, a fine second convex portion 105 (a dark dot portion in the drawing) as shown in FIG. 2B is randomly added. By forming, the tactile sensation when the user touches the textured surface can be improved. That is, the texture of the textured surface can be improved by randomly arranging fine convex portions on a relatively large smooth surface.

  In addition, inventor made some samples about the 2nd convex part 105, and carried out the sample test by a predetermined number of persons in manufacturing the embossed surface processed resin molded product 100. As for the sample, as shown in FIG. 3, the height H (see FIG. 1) of the second convex portion 105 is two types (25 μm, 35 μm), and the pitch Lp (see FIG. 1) is five types for each height. (160 μm, 175 μm, 190 μm, 205 μm, 220 μm), a total of 10 types were prepared. As a result, the second convex portion 105 has a height of 25 μm and a pitch of 160 μm, 175 μm, 190 μm, and 205 μm, and has a better tactile sensation when touched than a conventional general textured resin molded product. , And getting results. Among them, the samples having a height H of 25 μm and a pitch Lp of 160 μm were evaluated as having the best tactile sensation, and therefore, the range of ± 3 μm for the height and ± 10 μm for the pitch was set as the optimum value.

  Also from this sample test, it can be seen that the texture of the textured surface processing is improved by randomly arranging fine convex portions on a relatively large smooth surface.

  In the manufacture of the textured surface processed resin molded product 100, when the mold is manufactured, the surface of the mold is subjected to the textured surface processing by using a sheet bonding etching method using a film. Further, the embossed surface processed resin molded product 100 is manufactured by injection molding using the manufactured mold.

[Other embodiments]
(1) Where to use the textured surface molded resin molded product 100: In Example 1 described above, the textured surface processed resin molded product 100 is used as an automobile interior product, but if it is a location where good tactile sensation is required, It is not limited to the example.

(2) Surface processing: In Example 1 described above, the texture processing is exemplified as the surface processing, but the surface processing is not limited to the illustrated one as long as it has the second convex portion having a relatively large area. For example, dimple processing or leather processing having small pores may be used.

  (3) Location having the second convex portion: In Example 1 described above, the second convex portion 105 is formed in the first concave portion 101 and the first convex portion 103. You may make it form only in the 1st convex part 103. FIG.

  The surface-treated resin molded product according to the present invention can be used, for example, for an automobile interior product.

DESCRIPTION OF SYMBOLS 100 Surface processed resin molded product 101 1st recessed part 103 1st convex part 105 2nd convex part

Claims (1)

A surface-treated resin molded product having a surface treatment composed of a first concave portion and a first convex portion arranged on the surface,
At least the first protrusion is
2nd convex part fine on the surface,
Have
The second convex portion is
Randomly arranged on the surface of the first convex portion,
Surface processed resin molded product characterized by

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