JP5896155B2 - Resin molded product with wrinkles - Google Patents

Description

  The present invention relates to a resin with an embossment in which a plurality of geometric embossments are formed on the surface portion, each of which includes an upper surface portion formed at a predetermined height above the surface portion and an outer peripheral inclined portion extending from the outer periphery of the upper surface portion to the surface portion. It relates to molded products.

Conventionally, matte patterns such as pear texture, leather texture, and geometric patterns are transferred onto the surface of resin molded products used for interior parts such as vehicle instrument panels and door trims. It is known to enhance the properties and impart a high-class feeling to interior parts.
Normally, a resin molded product with a texture is subjected to a texture processing that reproduces the texture pattern by chemical corrosion (etching) on the molding surface of the mold, and by injecting a thermoplastic resin into this mold, the surface of the resin molded product is three-dimensional. The wrinkled pattern is transferred.

Polyolefin resin and rubber-reinforced styrene resin have poor transferability to the molding surface even if the molding surface of the mold is subjected to a textured process, making it difficult to obtain a molded product surface with reduced gloss, and glossy state. Since it depends on the injection molding conditions, it is difficult to stably obtain the expected gloss.
Therefore, various techniques for preventing the gloss and excessive gloss generated on the surface of the resin molded product while changing the texture of the surface of the resin molded product while maintaining the texture pattern on the surface of the resin molded product have been proposed.

  The resin molded product for interior of a vehicle of Patent Document 1 has a geometric wrinkle composed of an upper surface portion formed at a predetermined height higher than the surface portion and an outer peripheral inclined portion extending from the outer periphery of the upper surface portion to the surface portion. It is a resin molded product with a textured portion made of polypropylene formed in a part, and a pinhole extending vertically in the direction of the surface part is formed in the outer peripheral inclined part. As a result, a part of the light incident on the outer peripheral inclined portion is incident on the pinhole, and the incident light is attenuated by repeated reflection on the inner wall surface of the pinhole, so that reflection of light from the outer peripheral inclined portion is suppressed. It can improve matteness and low glossiness.

  Geometric wrinkles often used for resin moldings for interiors of vehicles are composed of mesh-shaped concave portions and convex portions protruding in the concave portions. In particular, grain wrinkles classified as geometric wrinkles are disclosed in the above-mentioned patent document. As described in FIG. 1, the spacing between the frustoconical convex portions is widened by increasing the width of the mesh portion.

JP 2010-215065 A

  In the resin molded product for interior of a vehicle disclosed in Patent Document 1, a part of light incident on the outer peripheral inclined portion is attenuated by using a pinhole formed on the outer peripheral inclined portion, so that reflection of light from the outer peripheral inclined portion is effective. Can be suppressed. However, since the pin portion of the mold for forming the pinhole and the embossed outer peripheral inclined portion intersect with each other in an inclined manner, when the resin molded product is released from the die, the height position of the pin portion Different shearing forces act on the outer peripheral inclined portion. That is, when the resin molded product is released, there is a possibility that the shape of the outer peripheral inclined portion is partially collapsed by the shearing force generated by the pin portion, and the texture shape on the surface of the resin molded product varies.

Moreover, in patent document 1, since the diameter of a pinhole is set in the range of 100 micrometers or more and 150 micrometers or less, the diameter of the pin part of a metal mold | die is also set in the substantially similar range.
Therefore, when the pin portion within the set range is erected on the molding surface of the mold, it is difficult to maintain the uprightness of the pin portion against the injection pressure of the resin, and the shape of the outer peripheral inclined portion at the time of mold release In addition to the collapse, there is a possibility that the shape of the outer peripheral inclined portion may be deformed due to the deformation of the pin portion. Such a variation in the embossed shape on the surface of the resin molded product leads to a decrease in the texture of the interior parts and an instability of the quality, and as a result, there is a possibility that the merchantability may be decreased.

  An object of the present invention is to provide a resin-molded product with a texture that can enhance matteness and low glossiness while maintaining the merchantability of the resin-molded product.

The resin molded product with a grain according to claim 1, wherein the surface has a geometric texture comprising an upper surface part formed at a predetermined height higher than the surface part and an outer peripheral inclined part extending from the outer periphery of the upper surface part to the surface part. In the resin molded product with embossing formed in a plurality of portions, at least one or more pinholes that attenuate the reflection of incident light from the upper surface portion are provided only in the upper surface portion, and the average diameter of the pinhole is Da, The pinhole is configured so as to satisfy the relational expression of Da / Ha ≦ 8 when the average depth of the pinhole is Ha .

  In the resin molded product with a grain according to claim 1, since at least one pinhole for attenuating reflection of incident light from the upper surface part is provided in the upper surface part of the geometric texture, the incident light is incident on the upper surface part. A part of the light enters the pinhole, and reflection is repeated on the inner wall surface of the pinhole to attenuate the incident light, thereby suppressing reflection of light from the upper surface portion.

The invention according to claim 2 is characterized in that a plurality of geometric textures are formed on the surface portion, each of which includes an upper surface portion formed at a predetermined height above the surface portion and an outer peripheral inclined portion extending from the outer periphery of the upper surface portion to the surface portion. In the molded resin product with grain, at least one or more pinholes that attenuate the reflection of incident light from the upper surface portion are provided only in the upper surface portion, and the average diameter of the pinhole is Da, When the average depth is Ha, the pinhole is configured to satisfy a relational expression of 4 ≦ Da / Ha.
According to a third aspect of the present invention , a plurality of geometric textures are formed on the surface portion including an upper surface portion formed at a predetermined height above the surface portion and an outer peripheral inclined portion extending from the outer periphery of the upper surface portion to the surface portion. In the molded resin product with grain, at least one or more pinholes that attenuate the reflection of incident light from the upper surface portion are provided only in the upper surface portion, and the average diameter of the pinhole is Da, When the average depth is Ha, the pinhole is
310 μm ≦ Da ≦ 450 μm
56μm ≦ Ha ≦ 78μm
It is characterized by being configured to satisfy the relational expression of

A fourth aspect of the invention is characterized in that, in the invention of any one of the first to third aspects, the resin-molded article with wrinkles is a vehicle interior member.
The invention of claim 5 is the invention according to any one of claims 1 to 4 , wherein the material of the resin-molded article with grain is a styrene thermoplastic elastomer, and the fluidity index (MFR) of this material is 60. It is characterized by being (g / 10 minutes) or more and 270 (g / 10 minutes) or less.

According to the first aspect of the present invention, a part of the light incident on the upper surface portion of the geometric texture is incident on the pinhole, and the incident light is attenuated by repeatedly reflecting on the inner wall surface of the pinhole, and the upper surface portion. Therefore, the matteness and low glossiness of the resin molded product can be improved.
In addition, since the pin hole is provided only on the top surface of the geometric embossing, when the resin molded product is released from the mold, the pin portion and the top surface portion are not related to the height position of the pin portion of the mold. The shearing force generated between them can be made uniform, and the deformation of the embossed shape on the surface of the resin molded product can be prevented.
Therefore, mattness and low glossiness can be enhanced while maintaining the merchantability of the resin molded product with a texture. Furthermore, it is possible to increase the reflection suppressing effect on the upper surface portion of the geometric texture while suppressing the manufacturing cost of the mold.

According to the invention of claim 2 , a part of the light incident on the upper surface portion of the geometric texture is incident on the pinhole, and the incident light is attenuated by repeatedly reflecting on the inner wall surface of the pinhole, and the upper surface portion. Therefore, the matteness and low glossiness of the resin molded product can be improved.
In addition, since the pin hole is provided only on the top surface of the geometric embossing, when the resin molded product is released from the mold, the pin portion and the top surface portion are not related to the height position of the pin portion of the mold. The shearing force generated between them can be made uniform, and the deformation of the embossed shape on the surface of the resin molded product can be prevented.
Therefore, mattness and low glossiness can be enhanced while maintaining the merchantability of the resin molded product with a texture. Furthermore, it is possible to increase the reflection suppressing effect of the upper surface portion of the geometric texture while ensuring the straightness of the pin portion of the mold.
According to the invention of claim 3 , a part of the light incident on the upper surface portion of the geometric texture is incident on the pinhole, and the incident light is attenuated by repeating reflection on the inner wall surface of the pinhole, and the upper surface portion. Therefore, the matteness and low glossiness of the resin molded product can be improved.
In addition, since the pin hole is provided only on the top surface of the geometric embossing, when the resin molded product is released from the mold, the pin portion and the top surface portion are not related to the height position of the pin portion of the mold. The shearing force generated between them can be made uniform, and the deformation of the embossed shape on the surface of the resin molded product can be prevented.
Therefore, mattness and low glossiness can be enhanced while maintaining the merchantability of the resin molded product with a texture. Furthermore, it is possible to increase the reflection suppressing effect of the upper surface portion of the geometric texture while achieving both the manufacturing cost of the die and the uprightness of the pin portion of the die.

According to the fourth aspect of the present invention, it is possible to improve the matteness and low glossiness of the vehicle interior member that is easily noticeable by the vehicle occupant.
According to the invention of claim 5 , it is possible to improve the transferability of the geometric texture to the resin molded product.

It is a perspective view of the instrument panel which concerns on Example 1 of this invention. It is a longitudinal cross-sectional view of the peripheral part provided with the pinhole. It is an enlarged photograph of the design side of an instrument panel. It is the height measurement graph of the IV-IV line cross section of FIG. It is a principal part longitudinal cross-sectional view of the metal mold | die for forming the resin molded product with a grain. FIG. 3 is a diagram corresponding to FIG. 2 according to the second embodiment. FIG. 3 is a diagram corresponding to FIG. 3 according to the second embodiment. It is a table | surface which shows the measurement result of a glare degree (gloss degree) and a glossiness degree. FIG. 3 is a diagram corresponding to FIG. 2 according to a comparative example. FIG. 4 is a view corresponding to FIG. 3 according to a comparative example. It is a graph which shows the correlation with the average diameter and average depth of a pinhole, the glare degree (gloss degree), and the glossiness degree.

  Hereinafter, modes for carrying out the present invention will be described in detail based on examples.

Embodiment 1 of the present invention will be described below with reference to FIGS.
As shown in FIG. 1, in the first embodiment, an instrument panel 1 will be described as an example of an interior member of a vehicle. The vehicle interior member is not limited to the instrument panel 1 and can be applied to various trim members such as a door trim and a pillar trim of a side door. In other fields, any member made of a synthetic resin can be used. It is also applicable to.

The instrument panel 1 is an integrally molded article made of a thermoplastic resin having an MFR (fluidity index) of 60 (g / 10 minutes) or more and 270 (g / 10 minutes) or less. In Example 1, SEBS, which is one of styrene-based thermoplastic elastomers (TPS) having an MFR of 100 (g / 10 minutes), is used.
As shown in FIGS. 2 and 3, the design surface of the instrument panel 1 includes a plurality of geometric fringes having a truncated cone shape, for example, grain wrinkles (hereinafter abbreviated as wrinkles) 2. Is formed.
The texture 2 includes an upper surface portion 2b formed at a predetermined height higher than a surface portion 2a corresponding to the base portion of the instrument panel 1, and an outer peripheral slope extending from the outer periphery of the upper surface portion 2b to the surface portion 2a. It is comprised by the part 2c etc. The upper surface portion 2b is configured to be substantially parallel to the surface portion 2a, and as shown in FIG. 4, the height T is formed to be in the range of 53.8 to 98.9 μm, and the average height The thickness Ta is 83.7 μm.

  A single pinhole 3 is formed at the center portion of the upper surface 2 b of the texture 2 substantially in parallel with the center of the texture 2. The pinhole 3 is configured to have a smaller diameter as it goes to the back side, that is, as it approaches the surface portion 2a. The pinhole 3 is provided only in the upper surface portion 2b and is not formed in the outer peripheral inclined portion 2c. Although not shown, it is not essential to reduce the diameter of the pinhole 3 as it goes to the back side, and the pinhole 3 may have a substantially cylindrical pinhole shape.

The pinhole 3 is configured such that the average diameter Da in the upper surface portion 2b and the average depth Ha in the direction of the surface portion 2a satisfy the relational expressions (1) and (2) below.
310 μm ≦ Da ≦ 450 μm (1)
56 μm ≦ Ha ≦ 78 μm (2)
Further, the relationship between the average diameter Da and the average depth Ha satisfies the relational expression (3) below.
4 ≦ Da / Ha ≦ 8 (3)
Note that the average diameter Da of the pinhole 3 (the same applies to the pinhole 3A described later) is an average value obtained by measuring the diameter opened in the upper surface portion 2b of the texture at a plurality of locations.

  As shown in FIG. 4 and FIG. 8 in detail, in Example 1, the diameter D of the pinhole 3 in the upper surface portion 2b is formed in the range of 342.4 to 550.8 μm, and the average diameter Da is 446.6 μm. Is set to The depth H of the pinhole 3 is formed in the range of 27.6 to 84.6 μm, and the average depth Ha is set to 56.1 μm. The relationship (Da / Ha) between the average diameter Da and the average depth Ha is 7.96 (see FIG. 8). Thereby, a part of the light incident on the upper surface portion 2b is incident on the pinhole 3, and this incident light is attenuated by repeated reflection on the inner wall surface of the pinhole 3, so that the light from the upper surface portion 2b Reflection is suppressed.

Next, based on FIG. 5, the manufacturing method of the instrument panel 1 is demonstrated easily.
A resin molded product (instrument) having a plurality of embossments 2 is injected by injecting heat-fluidized SEBS into a cavity formed by the molding surface of the mold 4 and then cooling and solidifying the SEBS filled in the cavity. A ment panel 1) is formed.

  As shown in FIG. 5, the mold 4 includes a lower surface portion 4 a and a plurality of concave portions 4 b that are recessed from the lower surface portion 4 a into the mold 4. The plurality of concave portions 4b are configured in a truncated cone shape, and pin portions 4c extending downward are provided at the center portions of the upper surface portions thereof. Therefore, the heated and fluidized SEBS is injected into the cavity of the mold 4 heated to a predetermined temperature, for example, 30 to 80 ° C. under predetermined injection conditions. Since the shapes of the concave portions 4b and the pin portions 4c are transferred, the design surface of the instrument panel 1 has a surface portion 2a, a plurality of embossments 2 (an upper surface portion 2b and an outer peripheral inclined portion 2c), and a plurality of shapes. A pinhole 3 is formed.

  Next, an embossed resin molded product according to Example 2 will be described with reference to FIGS. In addition, only a different structure from the resin molded product with a wrinkle of the said Example 1 is demonstrated, the same code | symbol is attached | subjected to the member same as the said Example, and description is abbreviate | omitted.

The instrument panel 1A uses SEBS having an MFR of 100 (g / 10 minutes). The injection molding conditions are the same as in Example 1.
As shown in FIGS. 6 and 7, a plurality of frusto-conical textures 2 </ b> A are formed on the vehicle interior side design surface of the instrument panel 1 </ b> A over substantially the entire surface. A plurality of pinholes 3A are formed substantially parallel to the axis of the embossing 2A in the vicinity of the peripheral edge of each upper surface portion 2b. These pinholes 3 </ b> A are configured to have a smaller diameter as they go deeper. The pinhole 3A is provided only on the upper surface portion 2b and is not formed on the outer peripheral inclined portion 2c. In the second embodiment, as in the first embodiment, it is not essential to reduce the diameter of the pinhole 3 as it goes to the back side, and a substantially cylindrical pinhole shape may be used.

  In the second embodiment, the diameter D of the pinhole 3A in the upper surface portion 2b is formed in the range of 342.0 to 525.2 μm, and the average diameter Da is set to 433.6 μm. The depth H of the pinhole 3A is formed in the range of 63.7 to 91.5 μm, and the average depth Ha is set to 77.6 μm. The relationship between the average diameter Da and the average depth Ha (Da / Ha) is 5.59 (see FIG. 8).

Next, based on FIGS. 8-11, the measurement result of the glossiness degree and the glare degree degree of the resin molded product with a wrinkle which concerns on a present Example is demonstrated.
First, the measurement target member will be described.
As shown in FIG. 8, as a resin molded product with a texture to be measured, the comparative example corresponding to the prior art, the first and second embodiments, the first modification that is a modified structure of the second embodiment, and the first embodiment. Six types of measurement target members of Modification Example 2 which is a modification structure and Modification Example 3 which is another modification structure of Example 2 were prepared, and the glossiness and the glare degree of these measurement object members were measured. The injection molding conditions are the same as those in Examples 1 and 2 for any measurement target member.

As shown in FIGS. 9 and 10, the comparative example is an injection-molded product made of SEBS having an MFR of 100 (g / 10 minutes), and no pinhole is formed on the embossed upper surface portion 2b. .
The texture 2B includes an upper surface portion 2b formed at a predetermined height higher than the surface portion 2a corresponding to the base portion, and an outer peripheral inclined portion 2c extending from the outer periphery of the upper surface portion 2b to the surface portion 2a. Has been. The upper surface portion 2b is configured to be substantially parallel to the surface portion 2a, the height T thereof is formed in the range of 53.8 to 98.9 μm, and the average height Ta is 83.7 μm.

The first modification has basically the same configuration as that of the second embodiment, and the diameter D of the pinhole 3A and the depth H of the pinhole 3A are changed.
As shown in FIG. 8, in the first modification, the diameter D of the pinhole 3A is formed in the range of 283.6 to 351.0 μm, and the average diameter Da is set to 317.3 μm. Further, the depth H of the pinhole 3A is formed in the range of 51.9 to 88.5 μm, and the average depth Ha is set to 70.2 μm. The relationship (Da / Ha) between the average diameter Da and the average depth Ha is 4.51.

The second modification has basically the same configuration as that of the first embodiment, and the MFR of the material, the diameter D of the pinhole, and the depth H of the pinhole are changed.
As shown in FIG. 8, in the second modification, SEBS having an MFR of 222 (g / 10 min) is used as the material, and the diameter D of the pinhole 3 is formed within a range of 330.0 to 526.0 μm, and the average The diameter Da is set to 428.0 μm. Further, the depth H of the pinhole 3 is formed in the range of 44.3 to 87.4 μm, and the average depth Ha is set to 65.9 μm. The relationship (Da / Ha) between the average diameter Da and the average depth Ha is 6.49.

The third modification has basically the same configuration as that of the second embodiment, and changes the material MFR, the diameter D of the pinhole 3A, and the depth H of the pinhole 3A.
As shown in FIG. 8, in the third modification, SEBS having an MFR of 222 (g / 10 min) is used as a material, and the diameter D of the pinhole 3A is formed within a range of 322.5 to 485.0 μm. The diameter Da is set to 403.8 μm. Further, the depth H of the pinhole 3A is formed in the range of 50.9 to 82.8 μm, and the average depth Ha is set to 66.9 μm. The relationship (Da / Ha) between the average diameter Da and the average depth Ha is 6.04.

Next, the measuring apparatus will be described.
The glossiness was measured based on the glossiness of a plurality of points by traversing the measurement range of each measurement target member using a handy gloss meter (PG-1M) manufactured by Nippon Denshoku Industries Co., Ltd. The gloss meter at this time is set to measurement conditions with an incident angle and a reflection angle of 60 °.
The glare degree was measured based on the glossiness at a plurality of points by traversing the measurement range of each measurement target member using a micro surface photometer (MMP) manufactured by Nippon Denshoku Industries Co., Ltd. The minute surface photometer at this time is set to measurement conditions with an incident angle and a reflection angle of 45 °.
Based on the measurement values measured by these measuring devices, the measurement values of Examples 1 and 2 and Modifications 1 to 3 are subtracted from the measurement values of the comparative example to obtain the degree of glare (gloss degree) and the amount of decrease in the gloss degree. Each was calculated.

Each measurement result is demonstrated based on FIG. 8, FIG.
In Examples 1 and 2 and Modifications 1 to 3, the gloss level and the glare level (gloss level) are lower than in the comparative example. In the case of the same MFR, the greater the number of pinholes formed in the upper surface portion 2b, the lower the glossiness and the glare (glossiness). This is presumed to be because the attenuation effect of incident light incident on the upper surface portion is increased, and accordingly, the reflection suppression effect is increased.
It can also be seen that the greater the value of Da / Ha, the higher the reflection suppressing effect, and the degree of gloss and the degree of glare (gloss degree) are suppressed. Specifically, even if Da / Ha exceeds 8, the degree of decrease in the glare degree (gloss degree) does not change greatly, while the gloss degree tends to approach the comparative example, so that Da / Ha ≦ 8. It is considered preferable to be set. In addition, since transfer property improves so that MFR is large, surface shape, such as the surface roughness of the metal mold | die 4, is transcribe | transferred to the molded product surface, and glossiness and a glare degree (gloss degree) are further improved as the whole molded product. .

According to this resin molded product with a texture, part of the light incident on the upper surface 2b of the texture 2 and 2A is incident on the pinholes 3 and 3A, and this incident light is reflected by the inner wall surfaces of the pinholes 3 and 3A. Is attenuated and the reflection of light from the upper surface portion 2b is suppressed, so that the matteness and low glossiness of the instrument panels 1 and 1A as the resin molded product with embossing can be enhanced.
Moreover, since the pinholes 3 and 3A are provided only on the upper surface 2b of the embossing 2 and 2A, when the instrument panel 1 or 1A is released from the mold 4, the height position of the pin 4c of the mold 4 Regardless of this, the shearing force generated between the pin portion 4c and the upper surface portion 2b can be made uniform, and the deformation of the embossed shape on the surfaces of the instrument panels 1 and 1A can be prevented.
Therefore, mattness and low glossiness can be enhanced while maintaining the merchantability of the resin molded product with a texture.

In addition, according to the resin molded product with wrinkles of this embodiment, since the pinholes 3 and 3A are configured to have a smaller diameter as they go deeper, while improving the mold release performance of the resin molded product with wrinkles, The reflection suppressing effect of the upper surface portion 2b of 2 or 2A can be improved, and the matteness and low gloss of the instrument panels 1 and 1A can be further enhanced.
When the average diameter of the pinholes 3 and 3A is Da and the average depth of the pinholes 3 and 3A is Ha, the pinholes 3 and 3A are configured to satisfy the relational expression Da / Ha ≦ 8. While suppressing the manufacturing cost of the mold 4, it is possible to increase the reflection suppressing effect of the upper surface portion 2 b of the embossments 2 and 2 </ b> A.

When the average diameter of the pinholes 3 and 3A is Da and the average depth of the pinholes 3 and 3A is Ha, the pinholes 3 and 3A are configured to satisfy the relational expression 4 ≦ Da / Ha. The reflection suppressing effect of the upper surface portion 2b of the embossing 2 and 2A can be enhanced while ensuring the uprightness of the pin portion 4c of the mold 4.
When the average diameter of the pinholes 3 and 3A is Da and the average depth of the pinholes 3 and 3A is Ha, the pinholes 3 and 3A satisfy the relational expressions of 310 μm ≦ Da ≦ 450 μm and 56 μm ≦ Ha ≦ 78 μm. Since it is comprised in this way, the reflection suppression effect of the upper surface part 2b of the embossing 2 and 2A can be heightened, making the manufacturing cost of the metal mold | die 4 and the uprightness of the pin part 4c of the metal mold | die 4 compatible.

Since the resin-molded product with a grain is an interior member for a vehicle, the matteness and low glossiness of the interior member for a vehicle that is easily noticeable by a vehicle occupant can be improved.
Since the material of the resin molded product with a grain is a styrenic thermoplastic elastomer and the MFR of this material is 60 (g / 10 min) or more and 270 (g / 10 min) or less, The transferability of can be increased.

Next, a modification in which the above embodiment is partially changed will be described.
1) In the above-described embodiment, an example of a resin-molded product with a fringe having a frusto-conical grain wrinkle of geometric wrinkles has been described. It can be applied to various resin moldings with a grain. Further, in the examples, an example of forming a resin molded product with a texture in a single injection process has been described, but first, an intermediate molded body with a texture with no pinholes is molded, and the upper surface portion and A pinhole or the like may be formed to form an embossed resin molded product.

2] In the above embodiment, the example of SEBS among the styrenic thermoplastic elastomers (TPE) is described as the material of the resin-molded product with a texture. However, other TPE such as SEPS may be used.
It is also possible to use olefin thermoplastic elastomer (TPO), vinyl chloride thermoplastic elastomer (TPVC), etc., depending on the required performance of resin molded products and usage environment. It is also possible to use polypropylene (PP).

3) In the above-described embodiment, an example in which the embossment having pinholes is formed uniformly over substantially the entire interior design surface of the instrument panel has been described. The number of pinholes to be changed may be changed, and the presence or absence of wrinkles or pinholes can be adjusted.

4] In the above embodiment, the shape of the pinhole in plan view is circular, but it may be polygonal. In this case, the polygonal area opened on the top surface of the grain is converted into a circular area, and the average diameter Da is calculated from the diameter.

5) In addition, those skilled in the art can implement the present invention in various forms with various modifications without departing from the spirit of the present invention, and the present invention includes such modifications. is there.

  The present invention relates to a resin with an embossment in which a plurality of geometric embossments are formed on the surface portion, each of which includes an upper surface portion formed at a predetermined height above the surface portion and an outer peripheral inclined portion extending from the outer periphery of the upper surface portion to the surface portion. In the molded product, by providing at least one or more pinholes for absorbing incident light only on the upper surface portion, the matteness and low glossiness of the resin molded product can be improved while maintaining the merchantability. Can do.

DESCRIPTION OF SYMBOLS 1 Instrument panel 2 Wrinkle 2a Surface part 2b Upper surface part 2c Peripheral inclined part 3 Pinhole Da Average diameter Ha Average depth

Claims (5)

A resin-molded article with an embossed surface in which a plurality of geometric embossments formed on an upper surface portion formed at a predetermined height above the surface portion and an outer peripheral inclined portion extending from the outer periphery of the upper surface portion to the surface portion are formed on the surface portion. In
At least one or more pinholes that attenuate incident light reflected from the upper surface portion are provided only in the upper surface portion ,
A resin with wrinkles, characterized in that, when the average diameter of the pinholes is Da and the average depth of the pinholes is Ha, the pinholes are configured to satisfy the relational expression Da / Ha ≦ 8. Molding. A resin-molded article with an embossed surface in which a plurality of geometric embossments formed on an upper surface portion formed at a predetermined height above the surface portion and an outer peripheral inclined portion extending from the outer periphery of the upper surface portion to the surface portion are formed on the surface portion. In
At least one or more pinholes that attenuate incident light reflected from the upper surface portion are provided only in the upper surface portion,
Da mean diameter of the pin hole, said when the Ha an average depth of the pinhole, the pinhole, 4 ≦ Da / Ha features and to Resid ball that is configured to satisfy a relational expression Resin molded product. A resin-molded article with an embossed surface in which a plurality of geometric embossments formed on an upper surface portion formed at a predetermined height above the surface portion and an outer peripheral inclined portion extending from the outer periphery of the upper surface portion to the surface portion are formed on the surface portion. In
At least one or more pinholes that attenuate incident light reflected from the upper surface portion are provided only in the upper surface portion,
When the average diameter of the pinhole is Da and the average depth of the pinhole is Ha, the pinhole is
310 μm ≦ Da ≦ 450 μm
56μm ≦ Ha ≦ 78μm
Relations constructed that features and to Resid ball with a resin molded product to meet. The resin molded product with a grain according to any one of claims 1 to 3, wherein the resin molded product with a grain is an interior member for a vehicle . The material of the resin-molded article with a texture is a styrene-based thermoplastic elastomer, and the fluidity index (MFR) of the material is 60 (g / 10 minutes) or more and 270 (g / 10 minutes) or less. The resin molded product with a grain according to any one of claims 1 to 4.