JP2013107611A - Skin material for vehicle interior material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a skin material for a vehicle interior material that excels in design, and retains an excellent quality to the rub resistance etc.SOLUTION: The skin material for the vehicle interior material is formed with the constituent comprising at least a half tricot layer/a print layer/a nonwoven fabric layer, from the outermost layer side, and can projects an excellent design by giving the coloring to the each layer, and can hold the rub resistance. An excellent quality in the design or more in the rub resistance can be retained by installing the adhesive layer between the half tricot layer and the print layer.

Description

  The present invention relates to a vehicle interior material skin material using a nonwoven fabric and a half tricot, and can be suitably used as, for example, a ceiling material, a pillar material, a door trim material, a rear package material, and the like.

  Conventionally, vehicle interior materials are configured by combining a skin material made of a resin sheet such as a nonwoven fabric or vinyl chloride with a cushion material such as polyurethane foam.

  In order to obtain a design-like appearance, printing is performed on the surface of a nonwoven fabric as a skin material (Patent Document 1). However, if the printed pattern is changed to give more design, and the print pigment concentration on the printing surface is increased to enhance the contrast between the non-woven fabric surface and the printing surface, the design surface is excellent, but the printed surface is resistant to friction. It cannot be used as an actual vehicle interior material.

  There is also devised a design appearance by adhering a half tricot to the surface of a nonwoven fabric that is a skin material (Patent Document 2). Although an excellent design appearance can be obtained from the combination of the appearance of the nonwoven fabric surface and the half tricot layer, it is insufficient for making the design appearance more flexible.

Shokai 61-018544 JP2009-090548

  In view of the above problems, an object of the present invention is to provide a skin material for a vehicle interior material that has an excellent design appearance with a higher-class feeling and retains excellent quality as a vehicle interior material such as friction resistance. .

  The present inventor has found that the present invention is an excellent invention as a result of intensive studies to solve the problems.

  According to a first aspect of the present invention, there is provided a vehicle interior material skin material having a design appearance full of diversity by forming at least from the outermost layer side with a structure comprising a half tricot layer / printing layer / nonwoven fabric layer. The invention of claim 2 is characterized in that an adhesive layer is provided between the half tricot layer and the printing layer.

  By providing a printed layer on the outer layer side of the nonwoven fabric layer and bonding the outer layer side of the printed layer to the half tricot layer that is the outermost layer with an adhesive layer, the printed layer and the nonwoven fabric layer having a high printing density By giving the appearance design with a high-class feeling by the hue, and the half tricot layer being positioned as the outermost layer, the design and the design overflowing with the high-class feeling that each color and appearance of the nonwoven fabric layer, printing layer, and half tricot layer can bring Can be obtained. Furthermore, when the outermost half tricot layer is disposed on the outer side of the printed layer via an adhesive layer, abnormalities such as friction resistance are seen in the printed appearance even if printing is performed on the surface of the nonwoven fabric layer with a high concentration of ink. There is nothing.

  The skin material for vehicle interior materials according to the present invention is formed of a structure including a half tricot layer / printing layer / nonwoven fabric layer at least from the outermost layer side.

The short fiber for nonwoven fabric used in the nonwoven fabric layer is not particularly limited as long as it is a fiber that can be processed as a nonwoven fabric such as polyethylene terephthalate or polytrimethylene terephthalate, but polyethylene terephthalate is preferable in terms of fiber strength and cost. Moreover, the fiber of 1.7-6.6 dtex is preferable and 38-64 mm is preferable as fiber length. The basis weight is preferably 100-300 g / m ² . As a method for entanglement of the short fibers, a known method such as a needle punch method or a spun bond method can be used, but the needle punch method is preferable in terms of maintaining the thickness as a material.

  A printed layer is formed on the outer layer of the nonwoven fabric layer. The printing layer may be the entire surface of the nonwoven fabric layer or printing on a part thereof.

  In the case of a vehicle interior material skin material in which the surface of the nonwoven fabric layer is just printed, the higher the ratio of the colorant to the resin, the better the visual design, but the lowering of the friction resistance (the surface of the nonwoven fabric layer of the colorant) Print layer misalignment or discoloration due to lack of adhesiveness, etc., and the ratio of the colorant to the resin is reduced, or the colorant similar to the nonwoven fabric layer is used to reduce the friction resistance. Has been prevented.

  In the present invention, in order to obtain a high-quality design appearance, the printing density of printing can be selected as appropriate, and the ratio of the coloring material to the resin is not limited to the density of the coloring material, as long as printing is possible. Don't stick.

  As the printing method, a known printing method such as gravure printing or screen printing can be used.

  An adhesive layer can be formed on the outer layer of the print layer. As the adhesive to be used, any resin such as an acrylic resin, a urethane resin, or a rubber resin can be used. The amount of adhesion can also be appropriately selected within the range where there is no problem in the moldability as a vehicle interior material skin material, and any coloring may be applied.

  A half tricot layer is disposed on the outer layer of the printing layer. Although any material such as nylon or polyester can be used as the fiber to be used, it is preferable to use a polyester fiber due to friction resistance, light resistance and the like. As the knitting method, half tricot is preferable because the colors of the non-woven fabric layer and the printed layer can be seen by a relatively rough mesh. You may use what was colored in arbitrary colors.

  As described above, by appropriately coloring each layer of the nonwoven fabric layer, the printed layer, the adhesive layer, and the half tricot layer, it has become possible to arbitrarily create an excellent design as a vehicle interior material skin material.

  Hereinafter, in order to clarify the embodiment of the present invention, some examples and comparative examples will be described and described. In addition, this invention is not limited to an Example, In the range which does not deviate from the meaning of this invention, it can change suitably.

A non-woven fabric having a basis weight of 190 g / m ² was prepared by a needle punch method using gray original short fibers made of polyethylene terephthalate having a fiber diameter of 3.3 dtex and a fiber length of 51 mm. On the outer layer of this non-woven fabric, with a solid content ratio of 100 parts by weight of acrylic resin, 0.5 part by weight of blue pigment ink is screen-printed and converted to full surface printing, and a checkered pattern is printed at 12 g / m ² when dried. Went. A transparent urethane adhesive having a dry weight of 15 g / m ² was applied to the outer layer, and a black polyester half tricot of 20 dtex was bonded to obtain a skin material for vehicle interior materials.

  A skin material for vehicle interior materials was obtained under the same conditions as in Example 1 except that the solid content ratio of the ink used for screen printing was 1.5 parts by weight of the blue pigment with respect to 100 parts by weight of the acrylic resin.

  A skin material for vehicle interior materials was obtained under the same conditions as in Example 1 except that the solid content ratio of the ink used for screen printing was changed to 5.0 parts by weight of the blue pigment with respect to 100 parts by weight of the acrylic resin.

A ratio of 90/10 by weight of a gray primary short fiber made of polyethylene terephthalate having a fiber diameter of 3.3 dtex and a fiber length of 51 mm and a white heat-bonded fiber having a fiber diameter of 4.4 dtex and a fiber length of 51 mm And a nonwoven fabric having a basis weight of 190 g / m ² was prepared by a needle punch method. On the outer layer of this non-woven fabric, a checkerboard pattern is printed at a drying rate of 12 g / m ² when converted into a full surface print by screen printing with 5.0 parts by weight of a blue pigment based on 100 parts by weight of acrylic resin in a solid content ratio. Went. A 20 dtex black polyester half tricot was bonded to the outer layer by thermocompression bonding to obtain a vehicle interior material skin material.

(Comparative Example 1)
A non-woven fabric having a basis weight of 190 g / m ² was prepared by a needle punch method using gray original short fibers made of polyethylene terephthalate having a fiber diameter of 3.3 dtex and a fiber length of 51 mm. On the outer layer of this non-woven fabric, with a solid content ratio of 100 parts by weight of acrylic resin, 0.5 part by weight of blue pigment ink is screen-printed and converted to full surface printing, and a checkered pattern is printed at 12 g / m ² when dried. The skin material for vehicle interior materials was obtained.

(Comparative Example 2)
A skin material for a vehicle interior material was obtained under the same conditions as in Comparative Example 1 except that the solid content ratio of the ink used for screen printing was 1.5 parts by weight of the blue pigment with respect to 100 parts by weight of the acrylic resin.

(Comparative Example 3)
A skin material for vehicle interior materials was obtained under the same conditions as in Comparative Example 1 except that the solid content ratio of the ink used for screen printing was changed to 5.0 parts by weight of the blue pigment with respect to 100 parts by weight of the acrylic resin.

(Appearance evaluation)
Visually determine the design appearance from the outermost layer side of the prepared vehicle interior material skin material, ◎ if the appearance is deep and judged to be particularly excellent in design, ◎, if it is excellent in design, ○, flat △ indicates that the design is not deep but the design can be judged to be design based on the printed pattern, and X indicates that the design is completely flat and the design is difficult to feel. If it is Δ or more, it is determined that the appearance of the design is present.

(Abrasion resistance evaluation)
Skin material for vehicle interior materials (rubbing specimen) when rubbing 100 reciprocations with load 200g from outermost layer using JIS-L0849 friction tester type II (Gakushin type) as a friction element The appearance and the friction piece were visually determined and used as a dry cloth test. In addition, JIS-L0848 artificial sweat solution was dropped onto gold width 3 and used as a friction element, and the appearance and friction of a vehicle interior material skin material (scratched specimen) when rubbed 100 times with a load of 200 g from the outermost layer side. The child was judged visually and used as a sweat test. ○: Test specimens and friction elements that do not appear to be abnormal at all, print deviations are observed on the surface of the test specimens, but are not visually noticeable, and the frictional elements are slightly colored with printing ink △, and those in which the printing deviation was clearly seen on the surface of the test piece and it was judged that there was an abnormality visually, and those in which the color of the printing ink was clearly colored on the friction element were rated as x. If it is more than Δ, it is judged that there is no problem in actual use.

  Table 1. Further, the appearance of the example, especially Example 3, has a high ink concentration in the printing layer, and the appearance with the half tricot bonded is deep and excellent. On the other hand, in Comparative Examples, especially Comparative Example 1, since the ink concentration of the printing layer is low, only the nonwoven fabric layer and the printing layer having no half tricot are used, so that no depth is perceived.

  With respect to the friction resistance, all the examples were excellent for dry cloth, but for sweat cloth, a slight decrease was observed in Example 4 in which no adhesive layer was provided. In the comparative example, printing misalignment was observed in Comparative Example 3 in which the ink density of the printing layer was higher than that of the dry cloth, and when the ink density of the printing layer was high in the sweat cloth, printing misalignment and ink coloring on the friction element were observed. .

  It can be seen that the appearance is deep in design by combining half tricots, and that excellent effects are obtained by coloring each of the nonwoven fabric layer, the printed layer, the adhesive layer, and the half tricot layer. In particular, in Example 3 where the printing ink density of the printing layer is high, excellent design properties are brought out by changing the hue of each layer. On the other hand, although the comparative example has a design appearance that can be used practically, in Comparative Example 1, the ink density of the printed layer is low, so it is difficult to give a slight planar impression.

All the examples were satisfactory in terms of the friction resistance by the dry cloth. On the other hand, in Comparative Example 3 among the Comparative Examples, since the printing density was high, the printed pattern was confirmed to be misaligned when judged visually. In the friction resistance due to sweat cloth, there is a slight difference among the examples. In Example 4 using the heat-sealing fiber, there is no adhesive layer even though the printing density is the same as Example 3. The surface of the friction element after the test was slightly colored with printing ink. On the other hand, as for the comparative example, printing deviation and coloring of the friction element are recognized as the concentration of the printing ink increases.
Thus, it can be seen that the examples of the present invention maintain excellent quality.

  The skin material for vehicle interior materials having the nonwoven fabric layer / printing layer / half tricot layer according to the present invention, and in particular, the skin material for vehicle interior materials having the nonwoven fabric layer / printing layer / adhesive layer / half tricot layer is colored in each layer. By applying the above, it is possible to bring out a deep design, and an excellent skin material for vehicle interior materials. It can be widely used as interior materials for indoor use, including vehicle ceiling materials, and is extremely excellent in industrial applicability.

Claims (2)

  A skin material for a vehicle interior material, characterized in that it is formed of at least a structure comprising a half tricot layer / printing layer / nonwoven fabric layer from the outermost layer side.   The skin material for vehicle interior materials according to claim 1, wherein an adhesive layer is provided between the half tricot layer and the printed layer.