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US-20260124819-A1 - SHAPED PART FOR MANUFACTURING PIECES OF FURNITURE, HAVING INCREASED STABILITY DUE TO MATERIAL FIBERS AND HAVING A DEFINED QUANTITY OF ADHESIVE LAYER APPLIED, PROCESS FOR MANUFACTURING SAID SHAPED PART, AND USE

US20260124819A1US 20260124819 A1US20260124819 A1US 20260124819A1US-20260124819-A1

Abstract

A shaped part is composed of a polyurethane piece and two outer layers, the shaped part is furthermore, because of its structure suitable for producing pieces of furniture and, because of the composition of the polyurethane piece and its production using material fibers with a defined application quantity of the adhesive layer, has increased stability with respect to the conventional prior art shaped parts which are used in the production of pieces of furniture, and a method for producing the shaped part and the use of the shaped part for producing pieces of furniture and the pieces of furniture produced from the shaped part.

Inventors

  • Maximilian Kara
  • Martin Krauss
  • Andreas SCHÖHL

Assignees

  • PUREN GMBH

Dates

Publication Date
20260507
Application Date
20231114
Priority Date
20221115

Claims (14)

  1. 1 . A shaped part for the production of pieces of furniture, comprising an inner layer composed of a polyurethane piece, and two outer layers, and between the outer layers and the inner layer respectively one adhesive layer, with a further adhesive layer on the other side of the polyurethane piece, wherein the polyurethane piece of the inner layer is composed of chopped and compressed shreds of polyurethane material mixed with material fibers and a binder, and has a density of 400-700 kg/m 3 , and the outer layers have a layer thickness of 0.10-4.00 mm, and the adhesive layers have an application quantity of 40 to 600 g/m 2 .
  2. 2 . The shaped part according to claim 1 , wherein the material fibers are fiber particles realized from rock fibers, glass fibers, ceramic fibers or basalt fibers.
  3. 3 . The shaped part according to claim 1 , wherein the material fibers are fiber particles from carbon fibers.
  4. 4 . The shaped part according to claim 1 , wherein the outer layer consists of aluminum or of stone veneer.
  5. 5 . The shaped part according to claim 1 , wherein the material which the outer layer consists of is selected from high-pressure pressed laminate, continuous-pressed laminate, carbon fiber, resin-bound textiles, concrete, mineral-bound materials, ceramic materials, glasses, metals, weathering-resistant synthetic materials or precious woods.
  6. 6 . The shaped part according to claim 1 , wherein the adhesive layer consists of a 1 K-PUR prepolymer.
  7. 7 . The shaped part according to claim 1 , wherein the adhesive layer is constructed from an acrylate adhesive, from an in its initial state solvent-containing adhesive, from a dispersion adhesive or from a two-component adhesive.
  8. 8 . The shaped part according to claim 1 , wherein the shaped part is planar and has the shape of a panel.
  9. 9 . The shaped part according to claim 1 , wherein the polyurethane piece of the inner layer has a density of 550-660 kg/m 3 .
  10. 10 . The shaped part according to claim 1 , wherein the outer layer is varnished with a polyester varnishing, which has a layer thickness of 10-25 μm, as the outermost layer.
  11. 11 . A method for producing a shaped part according to claim 1 , comprising the method steps of chopping a polyurethane foam in a chopper to produce polyurethane shreds, and adding a binder to the polyurethane shreds and mixing, such that a mixture is created, and compressing the mixture obtained in this way to produce a polyurethane piece, and applying an adhesive layer onto at least one side of the polyurethane piece, and a further adhesive layer on the other side of the polyurethane piece, and pressing outer layers, which have a layer thickness of 0.10-4.00 mm, onto the side of the polyurethane piece on which the adhesive layers have been applied, wherein material fibers are added to the polyurethane shreds before the compression, and the compression to produce a polyurethane piece is carried out with such a pressure and such a duration that after the compression the polyurethane piece has a density of 400-700 kg/m 3 , and the adhesive layers are applied onto the at least one side of the polyurethane piece with an application quantity of 40 to 600 g/m 2 .
  12. 12 . A use of a shaped part according to claim 1 for the production of pieces of furniture.
  13. 13 . The use of a shaped part according to claim 12 , wherein the production of the piece of furniture is carried out by drilling a screw thread into the shaped part and screwing at least two shaped parts with one another to form a piece of furniture.
  14. 14 . A piece of furniture produced from a shaped part according to claim 1 .

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This patent application is a U.S. national stage application of international patent application PCT/EP 2023/081746, filed on Nov. 14, 2023, which is based on and claims priority to European patent application EP 22207501.2, filed on Nov. 15, 2022, the contents of which are incorporated herein by reference. FIELD The invention relates to a shaped part composed of a polyurethane piece and two outer layers, which because of its structure is suitable for producing pieces of furniture and, because of the composition of the polyurethane piece and its production using material fibers with a defined application quantity of the adhesive layer, has increased stability with respect to the conventional shaped parts from the prior art, which are used in the production of pieces of furniture. The invention also relates to a method for producing the shaped part and to the use of the shaped part for producing pieces of furniture and to the pieces of furniture produced from the shaped part. BACKGROUND Pieces of furniture have long been known in human history and can be produced from a variety of materials. Aluminum has proven to be very suitable for pieces of furniture because it has a low specific weight and good mechanical stability. It is therefore possible to produce pieces of furniture which are easily portable and are also durable and load-bearing. In addition, aluminum is stable in air and can be treated in such a way that it has a glossy and optically attractive surface. Herein the aluminum is usually provided in the form of pipes or tubes from which the load-bearing frames of the pieces of furniture are manufactured. Depending on the desired construction of the respective piece of furniture, walls or pieces of wall can also be produced from aluminum, for example as panels. In principle, however, all materials are suitable for the production of pieces of furniture, wherein those materials which have a low specific weight and good mechanical stability are preferred. In the production of the pieces of furniture, the problem comes up that the parts provided for the production of the piece of furniture must be fastened to one another. In the mutual fastening of the parts, screw connections are very often used. These have the advantage of being releasable and can moreover be provided for the desired purpose such that they have a certain screw depth, for example depending on a desired fastening strength. However, the aluminum structure is often less suitable for screw threads because it does not have a sufficient thickness and many material parts provided for the production of pieces of furniture are hollow. For this reason, solutions have been proposed in the prior art, providing the inner hollow space of the material parts intended for the production of pieces of furniture with fillers which lead to an only insignificant increase of the weight of pieces of furniture but fill the hollow spaces with solid material for improved mechanical strength. The document CN102242560A describes a matted composite material of an aluminum-plastic composite material, which consists in succession of a matted aluminum plate, a first polymer binder film, a polyurethane inner layer, a polymer adhesive film and a further aluminum plate, with a total of five layers. This composite material which is matted on one side is in particular used for the production of high-end quality pieces of furniture, for example in indoor spaces and automobiles. The document does not give any indications regarding the construction of the pieces of furniture themselves and also not regarding the mechanical strength of the described composite material. The document EP2796258A2 describes a two-dimensional electrical surface conductor with an insulating layer, which comprises a 5 mm thick layer of polyurethane foam, two electrically conductive aluminum foils, two layers of a 5 mm thick natural cork agglomerate, furthermore LED light-emitting diodes with electrodes having different lengths and having at their ends an epoxy varnish layer for insulation, and and electric power source. Due to the cork layer, the surface conductor provides an insulating and at the same time mechanically flexible inner layer for the installation of electrical components for the production of an electrical component with an electrically conductive surface. The document also mentions the possible production of pieces of furniture from the two-dimensional electrical surface conductor. The document likewise does not give any indications regarding the construction of the pieces of furniture themselves and also not regarding the mechanical strength of the described two-dimensional electrical surface conductor. The document DE202016106033U1 describes a panel with a core made of an extruded rigid foam, which is provided on at least one surface side with a cover layer made of a high-pressure laminated material (HPL), wherein the panel has on its end faces a