JP3297106B2 - Cushion body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushion body,
In particular, the present invention relates to a cushion body used for a cushion for a vehicle such as an automobile and a railway vehicle, a cushion for furniture, and a cushion for other chairs and the like.

[0002]

2. Description of the Related Art Conventionally, cushion bodies shown in FIGS. 3A and 3B are known as cushion bodies used for cushions of automobiles and the like. Here, FIG. 3A is a schematic perspective view partially cut away, and FIG. 3B is a cross-sectional view taken along line XX of FIG.

[0003] 1 in the figure is a flexible polyurethane foam. A wire frame 2 is embedded in the flexible polyurethane foam 1 for the purpose of reinforcing the back surface of the cushion body or providing elasticity and rigidity. The wire frame 2 is usually attached to an upper mold (back side) of a mold using an attachment jig such as a pin. After the wire frame 2 is attached, the flexible polyurethane foam stock solution is poured into the lower mold, the upper mold is closed, and then the cushion body in which the wire frame is embedded in the flexible polyurethane foam 1 by integral foaming is formed. A plastic plate made of polyester resin or the like may be attached instead of the wire frame.

[0004]

However, according to the conventional cushion body, the wire frame 2 is detached from the flexible polyurethane foam 1 during use, or the wire frame 2 is rubbed with the flexible polyurethane foam 1 to generate abnormal noise. May cause it. Further, in the case of a cushion body using a plastic plate, since it is formed in advance, it often does not exactly fit the shape of the upper mold. Further, during manufacture, the weight of the seat frame or the like falls off from the upper mold, resulting in a defective product or an accident.

The present invention has been made in view of such circumstances, and has sufficient reinforcement and rigidity and generates abnormal noise without using a reinforcing material such as a wire frame or a plastic plate as in the related art. It is an object of the present invention to provide a cushion body in which a reinforcing material does not fall off.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a polyurethane reaction elastic hardening molded integrally with a flexible polyurethane foam and the whole back surface or an arbitrary portion of the foam.
Layer , a polyurethane / polyurea reaction elastic hardened layer, or a polyurea reaction elastic hardened layer, wherein the reaction elastic hardened layer has a thickness of 0.5 to 3 mm and is at least one of polyether polyol and polyether polyamine. And a molded layer obtained by mixing and stirring any of an amine catalyst, a tin catalyst, a pigment and a flame retardant. In the present invention, the thickness of the reaction elastic hardened layer (the undiluted solution spray layer of RIM) is preferably about 0.5 mm to 3 mm in view of weight and cost. In the present invention, a polyol having 2 to 4 functional groups and a molecular weight of about 1,000 to 6000 is used as the polyether polyol. In the present invention, as the organic isocyanate, for example, tolylene diisocyanate,
4 'diphenylmethane diisocyanate is mentioned.
In the present invention, examples of the cross-linking agent include ethylene glycol, 1,4-butadiol, and DE-TDA aromatic diamine. In the present invention, known raw materials are properly used depending on the types of the raw materials, but an amine catalyst, a tin catalyst, a pigment, a flame retardant, and an additive are mixed as necessary.

[0007]

In the present invention, the cushion body is manufactured as follows.

First, a polyurethane RIM mixed stock solution, a polyurethane / polyurea RIM mixed stock solution, a polyurea RI
Spray one of the M mixed stock solutions as shown in FIG.
Is applied to the inner surface of the upper mold 12 with. Here, if the gel time is long, sagging will occur, so the gel time is set within 5 seconds, preferably within 3 seconds.

Subsequently, a normal flexible polyurethane foam stock solution is injected into the lower mold 13. Here, this foaming raw material can be used according to a target product such as a stock solution for hot molding, a stock solution for HR molding, a stock solution for small molding of headrests and console boxes and the like. For example,
In the case of a polyol, the number of functional groups is 2 to 4 and the molecular weight is 10
Known raw materials such as polyether polyol, tolylene diisocyanate (organic isocyanate), silicone oil, amine catalyst, other flame retardants and additives of about 00 to 6000 can be used.

According to the present invention, since the wire frame is not used unlike the prior art, the wire frame is detached from the flexible polyurethane foam during use, or the wire frame is rubbed with the flexible polyurethane foam to generate abnormal noise. There is no fear of letting you do it. Also,
Since a plastic plate is not used unlike the conventional case, there is no possibility that the shape does not exactly fit the shape of the upper mold. Further, the wire frame or the like does not drop off from the upper mold due to its weight during the manufacturing, so that a defective product is not produced or an accident is not caused. In addition, reinforcement and rigidity can be provided at necessary places without using a wire frame as in the related art.

[0011]

FIG. 1 shows an embodiment of the present invention.
A description will be given with reference to FIGS. Here, FIG.
3A is a schematic perspective view with a part cut away, and FIG. 3B is a cross-sectional view taken along line XX of FIG.

Reference numeral 14 in the figure denotes a flexible polyurethane foam. On the entire back surface of the flexible polyurethane foam 14, a polyurethane reaction elastic hardened layer 15 having a thickness of 1.5 mm is formed integrally with the flexible polyurethane foam 14. Next, a method of manufacturing the cushion body having such a configuration will be described.

First, a rim spray P manufactured by Mitsui Toatsu Chemicals, Inc.
D130 solution A: solution B was mixed in a ratio of 1: 1 and applied to the inner surface of the upper mold by spraying to form an elastic cured layer having a thickness of 1 mm. Subsequently, a flexible polyurethane foam stock solution having the following composition was mixed and injected into the lower mold. Molecular weight 3000,3 functional polymer polyol 100 parts by weight of diethanolamine 1.5 parts by weight of triethylenediamine 0.07 parts by weight silicone oil 1.2 part by weight H ₂ O 3.0 parts by weight TM-20 (TDI80: MDI = 4: 1 41.5 parts by weight Further, the upper mold was closed, cured at 90 ° C. for 7 minutes, and then demolded.

According to the cushion body of the above embodiment,
The polyurethane reaction injection molding layer 15 is formed integrally with the foam 14 on the entire back surface of the flexible polyurethane foam 14, so that the wire is not required to be reinforced and rigidity is required without using a wire frame as in the related art. Can be provided.

Further, since a wire frame is not used as in the prior art, there is no danger that the wire frame will be detached from the flexible polyurethane foam during use, or that the wire frame will rub against the flexible polyurethane foam and generate abnormal noise. Absent.

Further, since a plastic plate is not used unlike the conventional case, there is no possibility that the plastic plate does not exactly fit the shape of the upper mold. Further, the wire frame or the like does not fall off from the upper mold due to its weight during the manufacturing, so that a defective product is not produced or an accident is not caused.

[0017]

As described in detail above, according to the present invention,
Obtain a highly reliable cushioning body that has sufficient reinforcement and rigidity, does not generate abnormal noise, and does not drop off the reinforcing material without using a reinforcing material such as a wire frame or a plastic plate as in the past. be able to.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a cushion body according to the present invention;
1 (A) is a schematic perspective view, and FIG. 1 (B) is X in FIG. 1 (A).
-Sectional drawing along X-ray.

FIG. 2 is an explanatory view for manufacturing the cushion body according to the present invention.

FIG. 3 is an explanatory view of a conventional cushion body, and FIG.
(A) is a schematic perspective view, FIG. 3 (B) is XX of FIG. 3 (A).
Sectional view along the line.

[Explanation of symbols]

11 ... spray, 12 ... upper mold,
13 ... lower mold, 14 ... flexible polyurethane foam, 1
5: polyurethane reaction elastic hardened layer.

Claims (1)

(57) [Claims] 1. A flexible polyurethane foam and any one of a polyurethane reaction elastic hardened layer , a polyurethane / polyurea reaction elastic hardened layer, and a polyurea reaction elastic hardened layer integrally formed on the entire back surface of the foam or at an arbitrary position. The reaction elastic hardened layer has a thickness of 0.5 to 3 mm,
At least one of polyether polyol or polyether polyamine and an organic isocyanate, a crosslinking agent, or further an amine catalyst, a tin catalyst, a pigment,
A cushion body comprising a molded layer obtained by mixing and stirring any of the flame retardants.