SU733519A3 - Method of making materials with fleecy surface - Google Patents

Abstract

A process for producing pile surfaced materials in which a polymer and a backing web are fed to a substantially smooth surface heated to above the softening point of the polymer, the polymer being between the backing and the surface so that it is softened and adheres to said substantially smooth surface, withdrawing the backing web with the polymer adherent thereto from said surface so that fibrils or tufts of said polymer are drawn out between said backing and said surface, cooling said fibrils or tufts characterised in that the backing web is heated at a position prior to contacting position where the polymer contacts the heated surface from which it is drawn into fibrils or tufts.

Description

I

The invention relates to the performance of plastics, in particular to the development of a method for producing a material with a fleecy surface (decorative material).

A method is known for producing a material with a fleecy surface by contacting a sheet of thermoplastic polymer (polyethylene) on a fibrous substrate with a hot metal shaft, to the surface of which the polymer sticks, tearing off the palimer sheet from the shaft and then cooling it simultaneously (1.

The known method is not productive enough. In addition, the material produced by a known method has insufficient strength of the bond with the substrate, which results in tearing the pile from the substrate.

The purpose of the invention is to improve the performance of the method and improve the quality of the material (bond strength of the pile with the substrate) ..

The goal is achieved by the fact that according to the method of obtaining a material with a fleecy surface, contacting a sheet of thermoplastic polymer (polyethylene) on

According to the invention, before contacting the sheet, the fibrous substrate is heated to 80-200 ° C with a hot metal roll with a hot metal shaft, to the surface of which the polymer sticks, by separating the polymer sheet from the shaft with a subsequent 5 or 1 simultaneous cooling.

Example 1. A film of poly0 ethylene, green-colored piri-ement, with a thickness of 65 μm, is fed continuously along with a lining material (lining) - a density of 70 drum sulphate-sulfate paper (the lining material contacts the drum). The surface temperature of the drum is maintained at 170 ° С by heating the air. The feed rate of the film and substrate and the rotational speed of the hot drum are gradually increased to 3.5 m / min; at the same time receive a beautiful nap layer. The film film sticks to the mountains 25 what the shaft from which is held

tearing off the film together with the formation of a nap on the film; there is no film splitting due to heat transfer to the substrate from

30 drums. To compare the film from

polyethylene dyed with green pigment, 65 μm thick, served with the substrate — smb lane sulfite sulphate paper with a density of 70 g / m per drum, excluding its heating (at room temperature). The feed rate of the film is gradually increased, but the pile layer of the required quality is not obtained already at a speed of 2.5 m / min; however, the film has low adhesion to the substrate.

Example 2. The process is carried out analogously to example 1. The feed rate of the film on the substrate is gradually increased to 5 m / min. A satisfactory nap layer is obtained on the film. As the feed rate increases, the quality of the pile decreases.

Example 3. A 150 μm thick film of unpainted polyethylene is fed along with the substrate (bleached kraft paper with a density of 120 g / m to a drum at a temperature of 160 ° C. The film feed rate is gradually increased to 1.85 m / min, and a film is obtained, s beautiful vrsom. At speeds above 1.85 m / min, the quality of the pile is reduced. As in Example 1, no film peeling is observed from the substrate due to heat transfer from the drum to the substrate.

For comparison, a polyethylene film is fed along with a bleached kraft paper backing onto the drum without being heated. The feed rate of the film gradually increase to 1.4 kc / min. At speeds in excess of 1.4 m / min, a pile layer of unsatisfactory quality is obtained. In addition, the films are characterized by low adhesion to the substrate.

Example 4 The process is carried out as in Example 3. The maximum speed at which a material with a beautiful pile is obtained is 2.7 m / min.

In the examples given, multilayered materials are obtained with a friable, abrasion resistant surface, while the pile layer is characterized by high adhesion to the substrate.

Claims (1)

1. Patent of Great Britain No. 1378640, cl. D 1 K, pub. 06/12/74 (prototype).