JPH0446912Y2 - - Google Patents

Description

[Detailed explanation of the idea]

(Industrial Application Field) This invention relates to a seat skin material that covers a cushion body to constitute a furniture or vehicle seat. (Prior Art) The seat skin material covering the surface of the cushion body is preferably a flexible material, such as fabric, because it needs to follow the deformation of the cushion body when the seat is used, and for reasons such as tactility. However, when fabric alone is used as the skin material, when cutting and sewing the skin material to form a shape that covers the surface of the seat cushion, the fabric's good flexibility and elongation may cause the skin material to become distorted and cut. They are often sewn together, which tends to cause creases in the outer material and misalignment of the pattern. Also, due to distortions during cutting and sewing,
The skin material after sewing may be larger than the specified size, and in that case, the skin material may float off the surface of the cushion body or become loose, and furthermore, wrinkles may occur due to the looseness. become. Therefore, in order to prevent wrinkles caused by the above-mentioned causes, a skin material has been proposed in which a soft polyurethane foam is attached to the back side of the fabric to give the fabric some rigidity, thereby making it less likely to cause distortion during cutting and sewing. There is. The soft polyurethane foam attached to the back of the fabric is
It also has the effect of making the skin material softer to the touch. However, the soft polyurethane foam lining makes the back surface of the skin less slippery.
This may cause problems such as making it difficult to feed the sewing machine during sewing or making it difficult to apply the skin material to the surface of the cushion body. Therefore, in order to improve the slippage of the back surface of the skin material, a three-layer skin material has been proposed in which a backing fabric is further attached to the back surface of the soft polyurethane foam. (Problem to be solved by the invention) However, since the thickness of the skin material increases due to its three-layer structure, when it is applied to the surface of the seat cushion body, the concave portion of the surface of the cushion body is exposed to the surface of the skin material. Depression-like creases are more likely to occur. By the way, in order to make the creases less likely to occur, it is sufficient to reduce the thickness of the skin material, and it is conceivable to reduce the thickness of the fabric, backing fabric, and soft polyurethane foam. However, the fabric cannot be made too thin from the viewpoint of durability or texture, and since the backing fabric is made of thin material such as cheesecloth, the thickness of the backing fabric is the same as the entire surface material. The effect on the thickness is small. On the other hand, the soft polyurethane foam imparts appropriate rigidity to the fabric as described above, making it difficult for distortion to occur when the skin material is cut and sewn. Therefore, if the thickness of the soft polyurethane foam is made thinner, distortion will occur again when the skin material is cut and sewn, and the aforementioned wrinkles will occur in the skin material made of a single fabric. However, in the case of seat cushion bodies for vehicles, the seat surface of the cushion body is always concave from the viewpoint of maintaining the posture of the occupant and design, so the skin material may crease at the concave shape. It needs to be difficult to do. For this reason, the thickness of the soft polyurethane foam on the back side of the fabric is reduced to make the folds less likely to occur, knowing that distortion will occur during cutting and sewing. This invention was made in view of the above points, and aims to provide a skin material that is less prone to both wrinkles due to distortion during cutting and sewing, and creases that occur when attached to a cushion body. . (Means for Solving the Problems) The gist of this invention is that a surface member made of fabric, a soft foam layer, and a back surface member are laminated and integrated, and the soft foam layer is
A seat skin made of soft polyurethane foam with a hardness of 15Kg to 50Kg/314cm ² (JISK6401 compliant), with a backing material whose modulus at 30% elongation is 200g or less in both the vertical and horizontal directions (JISL-1068 compliant) It's in the material. (Function) In the skin material according to this invention, the front member, the soft foam layer, and the back member are laminated and integrated, so the front member stretches and deforms as one with the soft foam layer and the back member. , the elongation and flexibility of the front member will be limited by the soft foam layer and the back member. As a result, the elongation and flexibility of the skin material are suppressed to an appropriate level, making it difficult for the skin material to be distorted during cutting and sewing, thereby making it difficult for wrinkles to occur and misalignment of patterns and patterns to occur. Further, due to the cushioning properties of the soft foam layer, not only the soft feel of the surface member is not impaired, but also the soft feeling can be further enhanced. On the other hand, when the skin material is adhered to the surface of the cushion body, creases on the surface of the skin material in the concave portions of the surface of the cushion body are thought to occur in the following manner. In other words, when the skin material is applied to the surface of the cushion body, it bends along the concave shape of the surface of the cushion body, but if the back material that comes into contact with the surface of the cushion body has poor elongation, the lamination with that back material may occur. With the elongation of the laminated surface of the integrated soft foam layer being restricted, the soft foam layer is bent into a concave shape. As a result, the soft foam layer becomes loose on the surface opposite to the surface where elongation is restricted (the surface member side). If the soft foam layer has low hardness, folds in the form of depressions will occur on the surface of the soft foam layer in order to absorb the looseness. As a result, creases also occur in the surface member laminated on the surface of the soft foam layer. Therefore, it is presumed that by making the back member stretchable and making the soft foam layer have a predetermined hardness, it is possible to prevent the skin material from creases. As a result of considering this assumption, the soft foam layer was made of soft polyurethane foam with a hardness of 15 to 50 kg/314 cm ² (according to JISK6401), and the back member was made of 30
Modulus at % elongation is 200g in both vertical and horizontal directions
By using the following (based on JISL-1068), it was possible to prevent creases from occurring when the skin material was applied. Furthermore, by using a soft polyurethane foam having the above-mentioned hardness as the soft foam layer, the soft feel of the surface of the skin material and the cushioning properties required for the seat were not impaired. (Example) This invention will be explained below based on a partial sectional view of an embodiment of this invention shown in FIG. The illustrated skin material 10 has a soft foam layer 14 laminated on the back surface of a surface member 12.
A back surface member 16 is laminated on the back surface of the flexible foam layer 14, and these are integrated by an adhesive applied to the laminated surface or by welding by thermally melting both sides of the soft foam layer 14. The surface member 12 constitutes the surface of the skin material, and an optimal material is selected from among various fabrics from the viewpoints of decoration and surface feel.
Examples of the material include tricot, raised tricot, moquette, knit, and woven fabric. The soft foam layer 14 suppresses the elongation and flexibility of the surface member 12 to a certain level without impairing the soft feel of the surface member 12 and the cushioning properties required for the seat, and eliminates wrinkles and patterns during cutting and sewing of the skin material 10. Alternatively, it is possible to prevent the occurrence of pattern shift and the occurrence of creases in the concave portions of the cushion body when the skin material 10 is attached to the cushion body. In order to exhibit this effect, the soft foam layer 1
4 is a soft polyurethane foam with a hardness of 15 kg to 50 kg/314 cm ² (according to JISK6401). The thickness of the soft foam layer 14 is determined to be an optimal value in consideration of the thickness required for the skin material 10, soft feel, cushioning properties, the above-mentioned creases, etc., but is usually 1 to 15 mm,
Preferably it is about 5 to 10 mm. Further, the back member 16 is provided for the following reason. The first reason is to improve the slippage on the back side of the cover material, which improves the sewing machine feed during cutting and sewing, and also to facilitate the work of attaching the cover material to the surface of the cushion body. be.
The second reason is to prevent creases from forming on the surface of the skin material at the concave portions on the surface of the cushion body. The third reason is to protect the back surface of the soft foam layer 14. The back member 16 that exhibits the above-mentioned function is made of a material whose modulus at 30% elongation is 200 g or less in both the longitudinal and lateral directions (according to JISL-1068). An example of the back member 16 is a knit made by circularly or warp knitting polyester curled yarn (woolly textured yarn) with improved elasticity. The skin material 10 thus formed is cut into a predetermined shape, sewn into a shape that covers the seat cushion body, and is applied to the surface of the seat cushion body. In addition, in order to confirm the effect of this invention on the folds that occur when the skin material is attached to the concave cushion surface, skin material test pieces A to D in which the hardness of the soft foam layer 14 was varied were prepared. The test shown in FIG. 2 was conducted on skin material test pieces in which the stretchability of the back member 16 was changed. The test uses a jig 20 whose concave surface has a radius R of various sizes, bends the skin material test piece 18 along the concave surface, and bends the skin material test piece 18 to create creases on the surface of the skin material test piece 18. The radius R of the jig 20 is measured. The results are shown in Tables 1 and 2. Table 1 shows test results for skin material test pieces in which the hardness of the soft foam layer 14 was varied.
In the skin material test piece, the surface member 12 has a basis weight of 300.
The soft foam layer 14 is a soft polyurethane foam with a thickness of 5 mm, and its hardness is
The material changed as shown in the front, and the back member 16 is knit knitted from polyester woolly processed yarn with a thickness of 50 denier, and its modulus at 30% elongation is 167 g in the vertical direction of the fabric, and 167 g in the horizontal direction. Consisting of 66g. Table 2 shows the test results for skin material test pieces in which the stretchability of the back member 14 was varied. In the skin material test piece, the surface member 12 is made of knit with a basis weight of 300 g, the soft foam layer 14 has a thickness of 10 mm, and a hardness of 21 kg/
The back member 16 is made of 314 cm ² of soft polyurethane foam. The back member 16 is
The skin material test piece was a tricot of nylon thread with a thickness of 15 deniers, and was
%, and exhibits a modulus of 38 g when stretched by 30% in the transverse direction.The skin material test piece is a tricot of nylon thread with a thickness of 30 denier, and the modulus when stretched by 30% is Longitudinal direction
A skin material test piece weighing 1040g and 346g in the lateral direction.
It is a knit made of stockinette knitted rayon thread,
Modulus at 30% extension is 1130g in the vertical direction and 1130g in the horizontal direction.
385 g, and the skin material test piece was made of knit knitted polyester woolly processed yarn with a thickness of 50 denier, and the modulus at 30% elongation was 167 g in the longitudinal direction and 66 g in the transverse direction.

【table】

[Table] As is clear from Table 1, the harder the soft polyurethane foam (soft foam layer) of the skin material, the less wrinkles will occur on the surface of the skin material at the concave portions of the cushion body. However, when the hardness of the soft polyurethane foam becomes harder than 50Kg/ ^314cm2 ,
The soft feel of the upholstery material is lost, and the feeling when sitting on the seat becomes hard, making it less practical.
Kg/314cm ² is preferred. On the other hand, as for the back member, as is clear from Table 2, the smaller the modulus at 30% elongation, the less wrinkles will occur on the surface of the skin material at the concave portion of the cushion body. However, if we consider the size of the radius R of the concave shape generally attached to the surface of the cushion body, and the combination with the soft foam layer having the above-mentioned hardness, the modulus at 30% elongation will be If the back member weighs 200 g or less in both directions, it is possible to sufficiently prevent the skin material applied to a normal cushion body from wrinkling. Furthermore, when the skin material of this invention was cut and sewn and examined for wrinkles and misalignment of the pattern and pattern due to distortion during the cutting, no wrinkles or misalignment of the pattern or pattern were observed. (Effects) This invention is a skin material consisting of a three-layer structure consisting of a surface member made of fabric, a soft foam layer, and a back member.
Kg/314 cm ² of soft polyurethane foam, and the modulus of the back member when stretched by 30% is vertical.
It must weigh less than 200g in both horizontal directions. As a result, wrinkles may occur when cutting and sewing the skin material.
It is possible to prevent misalignment of the handle and pattern, and moreover, when the skin material is applied to the seat cushion body, creases are less likely to occur on the surface of the skin material at the concave portions of the surface of the cushion body. Furthermore, the surface of the skin material was made to have a good feel with a high degree of softness. Therefore, by applying the skin material of this invention to a seat cushion body, it is possible to obtain a seat with a good surface feel and appearance.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view of a skin material according to an embodiment of this invention, and FIG. 2 is a perspective view of the skin material during a test. 10... Skin material, 12... Surface member, 14...
Soft foam layer, 16... Back member.

Claims (1)

[Scope of utility model registration request] A surface member made of fabric, a soft foam layer, and a back member are laminated and integrated, and the soft foam layer has a hardness of 15Kg to 50Kg/314cm ²
A seat skin material made of soft polyurethane foam (based on JISK6401) and whose backing material has a modulus of 200g or less in both the vertical and horizontal directions (based on JISL-1068) at 30% elongation.