Vehicle seat

Abstract

The purpose of the present invention is to provide a vehicle seat that is difficult to deform and has high durability. The vehicle seat (1) is provided with a first cushion body (2) and a second cushion body (3) disposed above the first cushion body (2) and covering at least the upper surface of the first cushion body (2), and is characterized in that the first cushion body (2) includes a three-dimensional network structure obtained by irregularly partially welding continuous lines of a thermoplastic resin to form a loop, and the second cushion body (3) is disposed above the first cushion body (2) and covers at least the upper surface of the first cushion body (2); and the second buffer body (3) is configured from a longitudinal nonwoven fabric in which fibers are oriented in the thickness direction.

Description

technical field [0001] The present invention relates to vehicle seats for vehicles, trains, airplanes and the like. Background technique [0002] Conventionally, most vehicle seats have been made of lightweight, easy-to-mass-produce, and inexpensive polyurethane seats. However, in recent years, it has been recognized that the gas generated when polyurethane is burned is a toxic problem, and actions to reduce the use of polyurethane have appeared in various parts of the world. Specifically, EN45545, the EU standard, will also be adopted from fiscal 2020, and it is necessary to develop durable, lightweight, and environmentally-friendly vehicle seats that replace polyurethane as soon as possible. [0003] In addition, although the cushioning material made of polyurethane is excellent in durability, it has the problem of being poor in water permeability and prone to stuffiness. [0004] Therefore, a vehicle seat using a material instead of polyurethane has been studied. Paten...

AI Technical Summary

Problems solved by technology

[0012] However, in the seat of Patent Document 1, since it is only composed of a three-dimensional net-like structure, there is a problem of feeling unevenness to the touch.

In addition, the deformation is large and the durability is insufficient

In addition, in the seat of Patent Document 2, especially the area of ​​the front end of the seat located below the thigh when the user sits down is made of polyurethane, so there is a problem of insufficient ventilation and a small amount of polyurethane reduction.

The seat in Patent Document 3 is a laminate of a nonwoven fabric and a mesh structure, but the nonwoven fabric used as the upper layer has a three-dimensional structure by mixing and defibrating thermal bonding fibers and short fibers made of thermoplastic resin. obtained by melting, its deformation resistance and durability are not sufficient

In addition, since the cut ends of the upper non-woven fabric and the lower mesh structure are compression-bonded, there is also a problem that the shape of the product is limited.

In the seat of Patent Document 4, since it is only composed of a fiber structure formed of fibers oriented in the thickness direction, the cushioning property and the supporting force of the buttocks are insufficient.

In addition, the shape retention of the area in front of the seat to which load is applied is low, and the durability is insufficient.

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