JP2019165884A - Skin integrated foam molding product, vehicle seat, and manufacturing method of skin integrated foam molding product - Google Patents

Abstract

To provide a headrest capable of preventing an urethane foam raw material from leaching out to a surface of a skin even when only one layer of the skin is used without using other layers such as a wadding layer and a film layer.SOLUTION: A headrest 12 includes a skin 20, and a foamed resin 21 provided inside the skin 20 and in contact with the inner surface of the skin 20. A material having a light shielding degree of 99% or more is used for the skin 20.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a skin-integrated foam-molded product, a vehicle seat, and a method for producing a skin-integrated foam-molded product.

  For example, a skin-integrated foam molded product is used for a headrest or armrest of a vehicle seat. The skin-integrated foam-molded product is formed by injecting a liquid foamed resin into the inside of the skin and foaming it so that the skin and the foamed resin are integrated.

  Other layers such as a wadding layer and a film layer are always pasted to the inner surface of the skin of the above-described skin-integrated foam-molded product (see, for example, Patent Documents 1 and 2). This has the purpose of preventing the liquid foamed resin from leaching out to the surface side of the skin during molding.

JP 2010-214997 A Japanese Utility Model Publication No. 7-17525

  In the case of a skin-integrated foam-molded product, if the foamed resin can be covered only by the skin without using a wadding layer or a film layer on the inner surface of the skin, the manufacturing cost of the skin-integrated foam-molded product can be significantly reduced. However, in this case, since the liquid foamed resin oozes out on the surface of the skin and becomes dirty, it cannot be used as a product.

  The present application has been made in view of the above points, and even when only one layer of the skin is used without using another nest such as a wadding layer or a film layer, the liquid foamed resin oozes out to the skin surface side. One object of the present invention is to provide a skin-integrated foam-molded article, a vehicle seat, and a method for producing a skin-integrated foam-molded article that can prevent the above-mentioned.

  The skin-integrated foam-molded article according to one embodiment of the present invention includes a skin and a foamed resin provided on the inner surface of the skin and in contact with the inner surface of the skin, and the skin has a light shielding degree of 99% or more. Is.

  According to this aspect, even when only one layer of the skin is used without using other layers such as a wadding layer and a film layer, the liquid foamed resin can be prevented from oozing out to the skin surface side.

  Another aspect of the present invention may be a vehicle seat provided with the above-described skin-integrated foam-molded product.

  In another aspect of the present invention, a liquid foamed resin is injected into the inner surface of the skin and cured to form a skin-integrated foam molded product in which the inner surface of the skin is in contact with the foamed resin. The manufacturing method of a skin integral foam molding using the thing which has a degree may be sufficient.

  According to the present invention, even when only one layer of the skin is used without using other layers such as a wadding layer and a film layer, the liquid foamed resin can be prevented from oozing out to the surface of the skin. The manufacturing cost of the molded product can be drastically reduced.

It is a perspective view which shows an example of a structure of the vehicle seat. It is sectional drawing which shows the internal structure of a headrest. It is explanatory drawing which shows the mode at the time of shaping | molding of a headrest. It is a table | surface which shows the various parameters and experimental result of a skin sample. It is a graph which shows an experimental result. It is explanatory drawing which shows typically the apparatus used in experiment. It is a table | surface which shows the correlation coefficient with various parameters, such as a light-shielding degree, and the presence or absence of the foaming urethane raw material.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same element and the overlapping description is abbreviate | omitted. Further, the positional relationship such as up, down, left and right is based on the positional relationship shown in the drawings unless otherwise specified. Furthermore, the dimensional ratios in the drawings are not limited to the illustrated ratios. Moreover, the following embodiment is an illustration for explaining the present invention, and the present invention is not limited to this embodiment.

  FIG. 1 shows an example of a configuration of a vehicle seat 1 using a skin-integrated foam-molded product according to the present embodiment. For example, the vehicle seat 1 includes a seat part 10 on which a seated person sits, a backrest part 11 on which the seated person leans back, a headrest 12 as a skin-integrated foam molded product that supports the head of the seated person, and the like. .

  As shown in FIG. 2, the headrest 12 includes an outer skin 20, a foamed resin 21 serving as a pad, and a headrest stay 22.

  The skin 20 has a plurality of skin portions, for example, a front skin portion 20a, a rear skin portion 20b, and a lower skin portion 20c. The skin 20 is formed in a bag shape by sewing these skin portions 20a to 20c together. The skin 20 is, for example, a knitted fabric (tricot, jersey) or a woven fabric.

  The skin 20 has a light shielding degree of 99% or more. The degree of shading is measured by applying a predetermined amount of light to the black skin 20 using a light shielding tester (applicable to the light shielding test of the curtain of JIS L 105), and measuring the light transmitted through the skin 20 with an illuminometer. The degree of shading (%) ((X−Y) / X × 100) is calculated from the amount X (Lx) of light applied to the skin 20 and the amount Y (Lx) of light transmitted through the skin 20. .

  The foamed resin 21 is obtained by curing a foamed urethane raw material 30 as a liquid foamed resin obtained by mixing, for example, a resin premix and isocyanate. For example, as shown in FIG. 3, the foamed resin 21 is integrated with the skin 20 by filling the foamed urethane raw material 30 into the bag-shaped skin 20 and curing it. At this time, since no other layer is provided on the inner surface of the skin 20, the foamed resin 21 directly contacts and adheres to the inner surface of the skin 20 as shown in FIG. 2.

  Here, there is a high correlation between the presence or absence of leakage (leakage) of the foamed urethane raw material 30 to the surface side of the skin 20 and the light shielding degree of the skin 20, and the light shielding degree of the skin 20 is 99% or more. In this case, it will be described that the urethane foam raw material 30 does not ooze out.

  The table in FIG. 4 and the graph in FIG. 5 show the results of experiments conducted to examine the relationship between the light shielding degree of the skin and the presence or absence of the urethane foam raw material. The experiment was performed using a number of skin samples S (No. 1 to 23) having different light shielding degrees, basis weights, thicknesses, and yarn densities. In the experiment, the skin sample S is attached to the bottom of a cylindrical container 100 as shown in FIG. 6, and the foamed urethane raw material 30 is poured into the container 100 until a predetermined density is reached, and then foamed on the opposite side of the skin sample S. It was carried out by visually checking whether or not the urethane raw material 30 oozed out.

  As shown in the table of FIG. 4 and the graph of FIG. 5, when the light shielding degree of the skin sample S is 99% or more, the foamed urethane raw material 30 does not bleed, and when the light shielding degree is less than 99, foaming occurs. The seepage of the urethane raw material 30 was confirmed.

  In this experiment, as shown in FIG. 7, the correlation coefficient between the light shielding degree of the skin sample S and the presence or absence of the urethane foam raw material 30 leaching was 0.4930. On the other hand, the correlation coefficient between the basis weight of the skin sample S and the presence or absence of the urethane foam raw material 30 leaching is 0.3127, and the correlation between the thickness of the skin sample S and the presence or absence of the urethane foam raw material 30 leaching. The number of relationships was 0.2507. Therefore, the degree of shading of the skin sample has a high correlation with the presence or absence of the urethane foam raw material 30 leaching compared to other parameters.

  At the time of manufacturing the headrest 12, for example, the degree of light shielding of the candidate skin is confirmed or measured, and the skin 20 having a light shielding degree of 99% or more is selected from among them. Then, the urethane foam raw material 30 is injected into the inner surface of the skin 20 and cured to form the headrest 12 in which the outer skin 20 and the foamed resin 21 are in direct contact.

  According to the present embodiment, the headrest 12 includes the outer skin 20 and the foamed resin 21 in direct contact with the inner surface of the outer skin 20, and the outer skin 20 has a light shielding degree of 99% or more. Even if only one layer of the skin 20 is used without using other layers such as a film layer or the like, it is possible to prevent the foamed urethane raw material 30 from leaching out to the surface of the skin 20 during molding. The light shielding degree is more preferably 99.5% or more, and further preferably 99.8% or more.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the idea described in the claims, and these naturally belong to the technical scope of the present invention. It is understood.

  For example, the configuration of the headrest 12 described in the above embodiment is not limited to this. Further, in the above embodiment, the skin-integrated foam-molded product is the headrest 12, but may be another portion of the vehicle seat 1, for example, an armrest.

  The present invention provides a skin-integrated foam-molded article that can prevent the urethane foam raw material from leaching to the skin surface side even if only one layer of the skin is used without using other layers such as a wadding layer and a film layer. Useful when doing.

1 Vehicle Seat 12 Headrest 20 Skin 21 Foam Resin 30 Foam Urethane Raw Material

Claims (3)

The epidermis,
A foamed resin provided on the inner surface of the skin and in contact with the inner surface of the skin;
The skin is a foam integrated foam product having a light shielding degree of 99% or more.   A vehicle seat comprising the skin-integrated foam-molded product according to claim 1.   A liquid foam resin is injected into the inner surface of the skin and cured to form a skin integrated foam molded product in which the inner surface of the skin is in contact with the foamed resin, and the skin having a light shielding degree of 99% or more is used. Manufacturing method of integral foam molding.