CS277620B6 - Composite material for automobile and fancy industries - Google Patents

Abstract

The composite material consists of a nonwoven fabric of fibers of different physical properties, glass and polypropylene, fixed in various ways, provided on one or both sides decorative material. Mechanical-thermal processing the fabric into the desired shape we get the material with the desired properties usable in automobile or galantem industry. Mutual ratio of both components nonwoven fabric and setting parameters at mechanical-heat treatment to the desired shapes the desired properties products, structural strength, stiffness, durability corrosion, bacterial effects and extreme climatic conditions.

Description

Field of technology

The invention relates to a flat nonwoven fabric consisting of a mixture of fibers with different physical properties, namely glass and polypropylene fibers, fixed in different ways. Depending on the purpose of use, this material is supplemented with a decorative layer on one or both sides used for the production of panels for furnishing car interiors or haberdashery products, such as suitcases and other luggage or special-purpose packaging.

Prior art

At the same time, we know the technologies applied by the world's leading companies use various materials to produce panels for car interior fittings. ASAHI CHEMICAL IND. discloses a composite material based on a two-layer laminate and thermoplastic fibers and the second layer being regenerated natural and synthetic fibers as described in Japanese Patent No. 8,041,958. MITUKUNI SEISAKUSKO produces a similar composite material obtained by combining polyolefins which may be a fleece laminated with polypropylene fleece in a ratio of 80:20% which is described in Japanese Patent Specification No. 8,101,952. NISAN MOTOR KK discloses a material based on a composite of hardboard and two layers of paper impregnated with thermoactive resin 742. ALCOR GmbH, Kunststoffe, has developed a glass fiber material and an epoxy-based thermoactive resin, disclosed in EP 16 438.

A well-known application in the Czechoslovak Republic is the TEXLAN material used in the production of the rear panel for the Škoda 781 SL. It is a composite material, a sandwich, composed of these basic materials. The inner layer is a non-woven textile fleece consisting of 50% blends of polyethylene and polypropylene fibers and 50% secondary textile raw materials. On both sides of this middle layer, the glass fabric is impregnated with a thermosetting resin based on epoxy CHS 1/33. Other layers on the outside are made of polyester nonwoven fabric. The materials are molded by compression after preheating to a temperature of about 190 ° C in a mold.

The essence of the invention

The essence of the invention lies in the interconnection of materials of different physical properties and their mechanical-thermal treatment in order to obtain a material with all the required properties. The basis of the material is fibrous waste from the production of polypropylene and from the production of glass fiber processed as a non-woven fleece containing more weight percent of polypropylene fibers than weight percent of glass fibers. The resulting properties are achieved by mechanical-thermal treatment, where after preheating the material to a plastic state to the melting temperature of polypropylene there is a partial fixation of glass fibers and subsequent pressure is processed in a mold with constant temperature to the desired shape. The mutual properties of the molding can be influenced by the mutual combination of preheating and pressure. After processing, the material meets the requirements for structural strength, stiffness, resistance to corrosion, bacterial influences and extreme climatic conditions.

The economic effect lies in the possibility of using secondary raw materials, ie waste from the production of polypropylene and glass fiber, and the possibility of reusing the waste to process this material.

Overview of figures in the attached drawings

Giant. 1 denotes a composite material 1 provided on one side with a decorative layer 2.

Giant. 2 shows a composite material 1 provided with a decorative material 2 on both sides.

Examples of embodiments of the invention

In the 1st figure, the composite material 1 consists of a nonwoven web with a higher mass, polypropylene fiber content than glass fiber mass. The composite material is placed in a heating device, providing contact surface heating in a planar state at 220 ° C, where it is left for 1 1/4 minutes. Then the heated material is transferred to a cooled mold with a constant temperature located in the pressing device and at the same time a decorative textile material 2 is placed on the heated carrier material. These materials are then pressed in a mold at 15 ° C for 1 minute, the molding being circumferentially machined. osekem. The product thus obtained is dimensionally stable.

Figure 2 shows an alternative solution, where the composite material 1 is supplemented with a decorative material 2 from the other side. Processing technology - composite material 1 is inserted into a heating device providing contact flat heating in a planar state at 220 ° C, where it is left for 1 1/4 minutes. At the same time, the decorative material 2 is inserted into a cooled mold located in the molding machine. ° C for 1 minute, the molding being cut off circumferentially. The molding is rigid and there is no change in shape.

Industrial applicability

This material can be used for the production of panels for furnishing car interiors or haberdashery products, such as suitcases and other luggage or special-purpose packaging.

Claims (2)

1. A composite material for the automotive and haberdashery industries processed as a nonwoven fleece fixed by needling or stitching reinforced by hot pressing in a mold, characterized in that the nonwoven fleece consists of a mixture of polypropylene and glass fibers in a weight ratio 50:50 to 70:30 in favor of polypropylene. 2. A composite material according to claim 1, characterized in that the pressed nonwoven web is provided with a decorative layer on one or both sides.