JP3067400U - Flame retardant cushion body - Google Patents

Abstract

(57) [Summary] An object of the present invention is to obtain a flame-retardant cushion body in which a polyurethane foam is maintained in a clean state at the time of reuse and can be used effectively. The polyurethane foam includes a soft or semi-rigid polyurethane foam having flame retardancy, a plastic film formed on a surface side of the polyurethane foam, and a skin material formed on the plastic film. A flame-retardant cushion body 4 characterized in that:

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a flame-retardant cushion body, and more particularly to a seat cushion having high flame retardancy used for a railway vehicle or an aircraft.

[0002]

[Prior art]

 Conventionally, high-flame-retardant seat cushions used for railway vehicles or aircraft are usually bonded to a molded product cut from a polyurethane foam slab and a skin material (for example, leather fabric) with an adhesive. After partial adhesion and bonding, or after setting a skin material in a mold, a flame-retardant polyurethane foam stock solution is injected and foamed integrally.

[0003] Of the cushions, in the latter case of integral foam molding, when the foaming liquid foams, the foaming liquid oozes out to the surface of the skin material due to the foaming pressure. Therefore, in order to prevent this, a heat-fusible film is provided on the back surface of the skin material, the foaming solution is prevented by this film, and the foaming is completed. There are also molded products.

[0004]

[Problems to be solved by the invention]

 By the way, with these seat cushions, there is a work to peel off the skin material, apply a new skin material and reuse it when the skin material becomes very dirty or damaged or after a certain period of use. Here, if the skin material is made of a porous material such as cloth, dust, small dirt, sweat, etc. penetrate into the polyurethane foam from the surface of the skin material, and when the skin material is peeled off, the appearance is discomfort due to foreign matter and dirt. I feel it or feel discomfort due to bad smell.

[0005] Therefore, such a cushion that gives a feeling of discomfort cannot be reused after all and is discarded. In addition, even if the skin material is discarded after the intended expiration date and it is used for the purpose of recycling polyurethane foam into chips or the like, recycling is almost impossible due to the above-mentioned disadvantage.

The present invention has been made in view of such circumstances, and therefore, a flexible or semi-rigid polyurethane foam having flame retardancy, a plastic film formed on the surface side of the polyurethane foam, and a plastic film formed on the plastic film. An object of the present invention is to provide a flame-retardant cushion body in which a polyurethane foam is maintained in a clean state at the time of reuse and which can be used effectively by adopting a configuration including the formed skin material.

[0007]

[Means for Solving the Problems]

 The present invention is characterized by comprising a flexible or semi-rigid polyurethane foam having flame retardancy, a plastic film formed on the surface side of the polyurethane foam, and a skin material formed on the plastic film. It is a flame-retardant cushion body.

[0008]

[Embodiment of the invention]

Hereinafter, the present invention will be described in more detail. In the present invention, it is preferable to use, as the polyurethane foam, a polyurethane foam having a flame retardant grade in a material combustion test for railway vehicles or a flame retardancy that passes an aircraft flame retardancy test. Here, the latter polyurethane foam is, specifically, a foam having flame retardancy that passes the aircraft flame retardancy test in Appendix F of FAR25-853 (b). Further, the polyurethane foam, the physical properties depending on the intended use and part position is not be identified, the high density products typically 25kg ^{/ m 3} ~50kg ^/ m 3 is used.

In the present invention, it is preferable that the plastic film is a film having waterproofness, flexibility, and elongation. As a specific material of the film, a known material such as polyethylene, polypropylene, urethane, and acryl can be used. However, those that are rough and have no elongation cannot be used because they have no shape-following properties. The presence or absence of air permeability does not matter so much, but a porous or cut plastic film into which dust, foreign matters (dust, hairs), sweat, etc. enter is not preferred. Further, the film may be covered with a molded polyurethane cushion, or the skin material and the film may be laminated in advance with an adhesive or a frame, and then set in a mold and foamed integrally. May be. In this case, a film with a high melting point must be used so that the heat of reaction does not melt the film.

In the present invention, in order to form a plastic film into a soft or semi-rigid polyurethane foam, (1) a method of directly coating a plastic film on a polyurethane foam, or (2) laminating a plastic film on a skin material. Or (3) as shown in FIG. 2, a multilayer product 14 obtained by laminating a plastic film 13 on a skin material 12 on a mold 11 as shown in FIG. A method in which the polyurethane foam stock solution 15 is supplied to the mold 11 and foamed in a state where the skin material 12 is in contact with the mold surface, and the like.

[0011]

【Example】

 Hereinafter, a flame-retardant cushion body according to an embodiment of the present invention will be described with reference to FIG. In FIG. 1, the thicknesses of the plastic film and the skin material are drawn thicker than they are for convenience. It should be noted that the materials and the like of the components according to the present invention described in the following examples are merely examples, and do not specify the scope of rights of the present invention.

Reference numeral 1 in the figure denotes a flame-retardant flexible polyurethane foam. Here, as the flexible polyurethane foam 1, one having a flame retardant grade in a material combustion test for railway vehicles is used. On the surface side of the flexible polyurethane foam 1, a plastic film 2 is formed. Here, the plastic film 2 is made of a polyethylene film which has waterproofness and flexibility and has elongation. A skin material 3 is formed on the plastic film 2.

The flame-retardant cushion body having such a configuration is manufactured, for example, as follows. First, the flame-retardant flexible polyurethane foam 1 is formed into a target shape. Subsequently, a plastic film 2 is coated on the flexible polyurethane foam 1. Next, the skin material 3 is formed on the plastic film 2 to produce the flame-retardant cushion body 4.

As shown in FIG. 1, the flame-retardant cushion body according to the above embodiment has a flame-retardant flexible polyurethane foam having a flame-retardant grade in a material vehicle combustion test, and this polyurethane foam. 1, a waterproof, flexible, stretchable polyethylene film (plastic film) 2 and a skin material 3 formed on the film 2. .

Therefore, according to the flame-retardant cushion body 4, the presence of the plastic film 2 prevents dust, small dirt, sweat, and the like from penetrating the polyurethane foam 1 from the surface of the skin material 3. The polyurethane foam 1 can be maintained in a clean state and can be used effectively without feeling unpleasant feeling or unpleasant feeling due to bad smell when peeled off.

In the above embodiment, a case where a flexible polyurethane foam having flame retardancy is used has been described. However, the present invention is not limited to this, and a semi-rigid polyurethane foam having flame retardancy may be used.

[0017]

[Effect of the invention]

 As described above in detail, according to the present invention, a soft or semi-rigid polyurethane foam having flame retardancy, a plastic film formed on the surface side of the polyurethane foam, and a skin material formed on the plastic film With this configuration, it is possible to provide a flame-retardant cushion body in which the polyurethane foam is maintained in a clean state during reuse and can be used effectively.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a flame-retardant cushion body according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing an example of a method for manufacturing a flame-retardant cushion body according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Flexible polyurethane foam, 2, 13 ... Plastic film, 3, 12 ... Skin material, 4 ... Flame-retardant cushion body, 14 ... Multi-layered product, 15 ... Polyurethane foam stock solution.

Claims (3)

[Utility model registration claims] 1. A flexible or semi-rigid polyurethane foam having flame retardancy, a plastic film formed on a surface side of the polyurethane foam, and a skin material formed on the plastic film. Flame retardant cushion body. 2. The flame-retardant polyurethane foam according to claim 1, wherein the polyurethane foam has a flame-retardant grade in a material combustion test for railway vehicles or a flame-retardancy that passes an aircraft flame-retardant test. Flammable cushion body. 3. The flame-retardant cushion body according to claim 1, wherein the plastic film is a film having waterproofness, flexibility, and elongation.