Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1997-01-06
1999-04-20
Campbell, Eggerton A.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
428 31, B29C 3348, B60R 1300
Patent
active
058956115
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a process for producing interior trims for transport means, in particular motor vehicles, which consist of a bearing, dimensionally stable part and a decorative part that forms the visible side of the interior trim, the bearing, dimensionally stable part being made of plastic material strengthened by reinforcing inserts.
Interior trims of transport means, in particular motor vehicles, i.e. apart from parts hardly or never in contact with the user or load of the transport means, for example the inside roof lining, must as a rule have a certain minimum resistance against mechanical loads, i.e. for example a certain bending and tensile strength. Simultaneously, however, a certain dimensional stability with respect to natural influences such as temperature and temperature change, for example a specific thermo-longitudinal expansion within specified limits, or a limited moisture absorption and the like is of greater necessity. In addition to fulfilling such mechanical strength requirements, demands are placed in the design of interior trims for transport means, in particular motor vehicles, but also in a lowest possible weight and the direct securing of or direct connection with the decorative materials forming the visible side of the interior trims, such as foils consisting of ABS, ASA, TPO, PVC, PE, PP or PUR or natural decorative materials such as leather, textile fabrics, velour or carpet. Finally, interior trims of motor vehicles should have a minimum degree of sound-absorbing properties and additionally also be producable with the smallest possible effort in a recycling-friendly manner. In order to fulfil the largest possible number of these requirements placed on interior trims, in particular in motor vehicles, these have been produced up to now from a carrier plate consisting of a commonly available and foamed PUR mixture and a decorative material, connected or adhered to this, in such a manner that the decorative material is initially laid in the foam form and the foamable PUR mixture consisting of commonly available material is subsequently inlaid, it being necessary in view of the reaction pressures occurring during foaming to at least cover the seam points of the decorative material with a special foil in order to prevent a penetration of the foam to the visible side of the interior trim. In so far as it was also necessary for strength reasons to particularly reinforce the carrier plate, materials known and proven as filling or reinforcing material, such as mineral or plastic fibers, were used, these mineral or plastic fibers being placed into the foam form mostly in the form of a fleece, but sometimes also in the form of strands, before the foamable material is inlaid.
On the one hand, the use of plastic or mineral fibers and even the use of mineral material as a filling material or a reinforcing material is associated with a lot of effort and, on the other hand, not very friendly in terms of recycling or waste disposal and, finally, is also associated with a very high proportion of the weight. In particular, the use of a reinforcing material consisting of a mineral fiber material results on the one hand in a detriment of the working area, in particular of the health of the workers concerned with the production of the interior trims and, on the other hand, for example in the case of incineration of waste, leads to an increased occurrence of undesirable slag which can not be utilized. It must also be especially taken into account here that a certain amount of heating material is required in waste incineration which up to now had to be provided by the addition of mineral oil or heating oil.
The invention is therefore based on the object of providing a process for producing interior trim for transport means, in particular motor vehicles, which, on the one hand, permits the fulfilment of all mechanical strength requirements and the temperature independence requirements placed on an interior trim, but, on the other hand, also provides a reduction in the production costs with a s
REFERENCES:
patent: 4983442 (1991-01-01), Patel et al.
patent: 5580501 (1996-12-01), Gallagher et al.
Geltinger Hubert
Reichard Markus
Campbell Eggerton A.
Eldra Kunststofftechnik GmbH
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