JP2005192635A - One-piece expansion molding seat with skin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a one-piece expansion molding seat with a skin, which is formed to be more flexible and softer and excellent in the touch and sitting feeling in consideration of permeability of wadding, a seat face part, suppresses sweat, keeps a peripheral part in an appropriate touch, and increases retention of shape, resulting in excellence in sitting. <P>SOLUTION: Expanded slab 11a and 11b with a very low permeability of 0< permeability ≤1 cc/cm<SP>2</SP>/sec overlie a skin material 10 of the seat face part 1a. An expanded slab 11c with permeability of 10-30 cc/cm<SP>2</SP>/sec overlie the skin material 10 of the peripheral part to form a three-dimensional seat skin 1. A pad part 2 is made by one-piece expansion molding with the seat skin 1 from an expandable resin. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a skin-integrated foam-molded sheet suitable for constituting various sheets for automobiles, furniture and the like.

  Conventionally, as a wading material for the seat surface corresponding to the seat of the seat, it has been provided with a sheet skin in which a wading material having a lower air permeability than other parts is laminated on the back side of the skin material, and the seat skin and the pad portion are foamed resin. Since the foam-integrated sheet is integrally foamed from the bottom, the impregnation of the foamed resin does not proceed with a low-breathing wading material, so the seating surface is made soft and soft, and the other parts are relatively hard It has been proposed to form a feeling and obtain optimum support along the body pressure distribution of the seated person (Patent Document 1).

As the wading material for the skin integral foam molding, if the air flow rate is less than 5 cc / cm ² / sec, the air permeability is lost and the sheet is likely to be stuffy, and the air flow rate is 40 cc / cm ² / sec. If it exceeds 1, the impregnation of the foamed resin proceeds and a problem arises in the surface touch. Therefore, it has been proposed to use an air flow rate of 5 to 40 cc / cm ² / sec (Patent Document 2). ).
No. 3-35200 Reality 5-3305

  The inventors of the present invention can maintain the shape of the entire sheet by impregnating the wading material with the foamed resin, and provide a softer and softer feel to the surface or seating feeling even when the foamed resin is impregnated into the wading material. We conducted intensive research with the main objective of keeping it good and suppressing the occurrence of stuffiness.

  As a result, even if using a wading material with an air flow rate that has been a concern for stuffiness, the seat surface can be made softer and softer with a good feel or seating feeling, and stuffiness can also be suppressed. I found out that At the same time, it is found that the wading material having a certain amount of air flow, the seating surface part and the circumferential part are used separately, so that the shape retention of the entire seat can be enhanced around the circumference and the feeling around the circumference can be maintained well. It was.

  The problem to be solved by the present invention is to consider the ventilation amount of the wading material, and to form the seat surface part with a softer and softer feeling and a good feeling of sitting, while suppressing the stuffiness and the circumference The part also maintains an appropriate feel, enhances the shape retention of the entire sheet at the peripheral part, and obtains a skin-integrated foam-molded sheet having good seating properties.

The skin-integrated foam-molded sheet according to the present invention is a three-dimensional structure in which foamed slabs having different airflow rates are divided into a skin material for the seating surface portion and a skin material for the circumferential portion, and laminated as a wading material on the back side of the skin material having air permeability. The seat is provided with a shaped seat skin, and the pad portion is foam-molded integrally with the seat skin from foamed resin, and a foam slab having an extremely low air permeability of 0 <air flow rate ≦ 1 cc / cm ² / sec is used as the seat skin It is characterized by comprising a three-dimensional sheet skin laminated on a material and laminated with a foam slab having an air permeability of 10 to 30 cc / cm ² / sec on the outer skin material.

In the skin-integrated foam-molded sheet according to the present invention, the foamed slab having an extremely low air permeability of 0 <air permeability ≦ 1 cc / cm ² / sec can limit the impregnation of the foamed resin into the back layer side of the foam slab. Therefore, it is possible not only to prevent the occurrence of a gore, a gore feeling or a plate-like feeling in the seating part, but also to form a seating part with a softer and softer feeling and a good feeling or seating feeling, and a slight air permeability. Therefore, the stuffiness of the seating part accompanying long-time seating is suppressed. In addition, the foam slab with air permeability of 10 to 30cc / cm ² / sec allows the shape retention of the entire sheet to be exhibited in the peripheral part from the impregnated amount of the foamed resin. It can be formed to have a good feeling without a plate-like feeling.

  FIG. 1 is an explanatory view showing the structure of a sheet skin 1 in which a skin material and a wading material, which are main features of the present invention, are laminated. The seat skin 1 is formed in a three-dimensional shape suitable for a vehicle seat because the inner surface of the bank is a seat surface portion 1a from the central seat surface and the back surface is a circumferential portion 1b from the outer surface of the bank. As the skin material 10, a material having air permeability such as a fabric and a synthetic leather provided with air holes is used.

As the wading materials 11a and 11b (hereinafter referred to as “foamed slabs”) of the seat surface portion 1a, ether-based foamed slabs having extremely low air permeability of 0 <air permeability ≦ 1 cc / cm ² / sec are used. . The foamed slabs 11a and 11b have a number of cells of about 45 to 55 pieces / 25 mm. The number of cells can be scrutinized by microscopic examination according to how many cells exist in a linear range of 25 mm. In the seat surface portion 1a in which the foamed slabs 11a and 11b are laminated, the impregnation ratio of the foamed resin can be suppressed to about 20 to 30% of the thickness of the foamed slabs 11a and 11b.

As the foam slab 11c of the circumferential portion 1b, a polyester foam slab having air permeability of 10 to 30 cc / cm ² / sec and inexpensive in price is used. This foamed slab 11c has a cell number of about 40-50 pieces / 25 mm. In the circumferential portion 1b in which the foamed slabs 11c are laminated, the impregnation rate of the foamed resin can be suppressed to about 40 to 50% of the thickness of the foamed slab 11c.

  As the foamed slabs 11a, 11b, and 11c, those having a thickness of about 3 to 4 mm are used. The skin material 10 and the foamed slabs 11a, 11b, and 11c are laminated and bonded in a two-layer structure by lamination.

  When molding a car seat from the seat skin, the seat skin is set in the mold of the mold, and foamed resin such as urethane is filled and foamed inside the seat skin. And foam molding together. In the foam molding, the sheet skin is sucked with a blower, so that it can be reliably set in the mold. The foamed resin may be an injection amount that exhibits a pack rate of about 125 to 130% of the free foaming density and that exhibits a high-speed cure of about 2 minutes from the amount of catalyst added.

  When foam molding is performed in this manner, the pad portion 2 can be formed integrally with the sheet skin 1 from the foamed resin as shown in FIG. 2, and the foamed resin impregnates the back side of the foamed slabs 11a, 11b, and 11c. Impregnated layers 3a, 3b, 3c are formed.

In the structure, in the foamed slabs 11a and 11b having extremely low air permeability of 0 <air permeability ≦ 1 cc / cm ² / sec, the impregnation layer of about 0.6 to 1.2 mm with respect to the thickness of about 3 to 4 mm 3a and 3b are formed. In addition, in the foamed slab 11c having air permeability of 10 to 30 cc / cm ² / sec, an impregnation layer 3c of about 1.5 to 2.0 mm is formed with respect to a thickness of about 3 to 4 mm.

In the foam integrated foam sheet, in the foam slabs 11a and 11b having extremely low air permeability of 0 <air permeability ≦ 1 cc / cm ² / sec, the impregnated layers 3a and 3b of the foamed resin are thin. The seat surface portion 1a including the inner surface does not exhibit a gore, gore feeling or plate-like feeling, and can be formed from a material of the foamed slabs 11a, 11b with a softer and softer feel and good seating feeling. . In addition, even if the foamed slabs 11a and 11b have a slight air permeability, the stuffiness of the seating portion 1a due to long-time seating can be suppressed.

In the foam slab 11c having air permeability of 10 to 30 cc / cm ² / sec, a relatively thick impregnated layer 3 c is formed as a circumferential portion 1 b including the back and back surfaces from the outer surface of the bank. The overall shape retention can be imparted. Thereby, even if the seat surface portion 1a has a soft and soft feeling, the seating portion can be held by the peripheral portion 11b, so that it can be configured as an automobile seat having good seating property. However, the impregnated layer 3c does not exhibit the gore, gore feeling or plate-like feeling of the peripheral portion 1b, but can be kept in good touch.

Airflow: 0.3cc / cm ² / sec The product of the present invention in which a seat surface is formed with a very low air permeability slab, and the conventional product with a wading material with a non-air-permeable film inserted, temperature sensor, humidity Since the sensor was assembled to the seating surface, the comfort level and stuffiness of the seating surface were measured. As a result, as shown in FIG. 3, the film insert product (see the circled line) exhibits a noticeable stuffiness with the passage of time, and the comfort level is also impaired. On the other hand, it was confirmed that the product of the present invention (see the triangle mark line) can maintain a good comfort level because it can suppress stuffiness even when sitting for a long time.

It is sectional drawing which shows the sheet | seat skin of the skin integrated foam molding sheet | seat which concerns on this invention. It is sectional drawing which shows the skin integral foaming sheet | seat by the sheet | seat skin of FIG. It is a graph which shows the change of the comfort degree and stuffiness with progress of time by the present invention product and the conventional product of the film insert.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sheet | seat skin 1a Seat surface part 1b Circumference part 10 Surface material 11a, 11b 0 <foaming slab of 1 </ cc / cm < ² > / sec 11c Air flow: Foaming slab of 10-30cc / cm < ² > / sec 2 Foaming layer

Claims (1)

A foam slab with different airflow is divided into a skin material for the seating surface part and a skin material for the circumferential part, and a three-dimensional sheet skin is laminated on the back side of the breathable skin material as a wading material, and the pad part is foamed In a foam-integrated foam-molded sheet integrally molded with the sheet skin from a resin, a foam slab having an extremely low air permeability of 0 <air flow rate ≦ 1 cc / cm ² / sec is laminated on the skin material of the seat surface portion, and the air flow rate : A skin-integrated foam-molded sheet comprising a three-dimensional sheet skin formed by laminating a foam slab having air permeability of 10 to 30 cc / cm ² / sec on a skin material of a peripheral portion.

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