Seat with foamed plastic padding and process for its manufacture

Details Seat with foamed plastic padding and process for its manufacture Seat with foamed plastic padding and process for its manufacture

1989-12-13

1993-09-28

Aschenbrenner, Peter A.

Chairs and seats

Bottom or back

Cushioned

297DIG1, 297DIG5, 5481, 5459, A47C 2714

Patent

active

052481859

DESCRIPTION:

BRIEF SUMMARY
The invention relates to a seat, in particular for vehicles, with a padding of foamed plastics which comprises a supporting body made of an open-cell elastic plastic foam with a first specific gravity and a flame-resistant upholstering material, which are connected to one another, in particular glued in places, and with a flame-retardant layer made of an open-cell elastic plastics foam with a second specific gravity different from the first.
A known seat with a padding of foamed plastic--in accordance with WO-AL-87/06894 of the same applicant--consists of a foamed plastic with a supporting body made of an open-cell elastic plastic foam having a first specific gravity and with a flame-retardant layer made of an open-cell elastic plastic foam, provided with flame retardant, having a second specific gravity different from the first. The plastic foam and the flame-retardant layer are connected with each other, in particular through a foaming process, and are surrounded by an upholstery material which is flame-resistant. In order to achieve a sufficient permeability to air of such a padding, it was also proposed, after the completion of the padding, to push preferably heated needles through this padding, so that a corresponding exchange of air is possible. These paddings have proved, in themselves, to be very good in practice, but it has been found, however, that especially in extreme weather conditions or under various climatic conditions the comfort of the seats was not sufficient for the planned purpose of use in vehicles.
In addition, seats for public transport are already known--in accordance with DE-GM 85 06 816--which have a seat padding which is covered with a seat upholstery, in which the seat upholstery and padding consists of a flame-resistant and smokeless material. Frequently, one proceeds here such that between the flame-resistant seat upholstery and the seat padding, which mostly consists of plastic foam, a glass fibre mat is arranged, which is intended to prevent the seat upholstery burning through in the direction of the seat padding. However, it has been found here that in many cases the action of the flames originates from the floor, and the plastic foam of the seat padding tends to burn with the development of thick smoke, whereby the public transport is filled with smoke in a very short period of time, when a fire occurs, so that it is scarcely possible for the occupants to find their way. Accordingly, in this known seat, provision is made that beneath the seat padding in the supporting frame of the seat a fire-resistive plate is arranged. This requires the use of a special section for the mounting of the seat padding and also an additional expenditure through the arrangement of the fire-resistive plate. Also, the seat ventilation was not satisfactory in this form of embodiment.
Seats with padding of foamed plastic are very widely used in modern vehicle construction. Above all, they are used in rail and road vehicles, but also, predominantly in aircraft. Whilst the regulations which apply to rail vehicles as regards the self-extinguishing structure of the materials used or respectively as regards the generating of smoke, prescribe very strict guidelines, these regulations are further exceeded by the regulations which apply in the aircraft industry. Thus, in seats which are permitted for use in aircraft, a test is prescribed, in which the paddings are directly exposed to a flame from a burner, in their composition as provided for installation. This flame acts directly on the padding for a period of 2 minutes, after which the flame is extinguished or respectively removed. If the flames have not extinguished themselves until then, the padding is extinguished after 5 minutes. After this fire test, the weight loss of the padding must not be higher than 10%. In order to fulfill these extremely strict regulations, and at the same time to achieve a high degree of comfort in the seats in the case of long-haul flights, and to achieve a low weight, seat paddings of various elastic, open-cell soft foam

REFERENCES:
patent: 4031579 (1977-06-01), Larned
patent: 4060280 (1977-11-01), Van Loo
patent: 4184237 (1980-01-01), Blankenship
patent: 4190697 (1980-02-01), Ahrens
patent: 4486493 (1984-12-01), Burmeister et al.
patent: 4618532 (1986-10-01), Volland et al.
patent: 4736911 (1988-04-01), Heitmann
patent: 4793574 (1988-12-01), Fenske et al.
patent: 4892769 (1990-01-01), Perdelwitz et al.
patent: 4930173 (1990-06-01), Woller

Affiliated with

Also associated with

Rating

Seat with foamed plastic padding and process for its manufacture does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Seat with foamed plastic padding and process for its manufacture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Seat with foamed plastic padding and process for its manufacture will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2187388