RU2518561C1 - Paper-layered plastic (versions) - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: paper-layered plastic includes pressed pack of sheet layers of craft-paper, soaked with urea-melamineformaldehyde resin UMFR, at least, one layer of barrier paper and placed between it and soaked layers of paper, at least, one soaked with xanthene dye Rhodamine C, intermediate layer of pressed wood composite material, which contains sawdust of juniper Juniperus communis "Columnaris" and needles of pine-tree Pinus pumila.

EFFECT: invention makes it possible to extend arsenal of means in production of paper-layered plastic.

3 cl, 1 tbl

Description

The invention relates to the chemical industry, and more specifically to the production of plastics, in particular paper-laminated plastics (BSP), and can be used mainly as structural and finishing polymer materials, for example in the manufacture of furniture, finishing polymer panels for various purposes, as well as in other industries.

Known decorative paper-laminated plastic containing an extruded package of sheets of paper (kraft paper) impregnated with synthetic resins, located between the decorative layer and the paper layer of bleached or unbleached pulp without preliminary impregnation with resins, the weight of 1 m ² which is in the range from 15 to 60 g (PM RU 33061 U1, 10/10/2003, B32B 23/06).

The technical result of the invention is the expansion of the arsenal of funds in the production of BSP.

The specified technical result is achieved due to the fact that the laminated paper includes a pressed packet of sheet layers of kraft paper impregnated with urea-melamine-formaldehyde resin MFP, at least one layer of barrier paper and located between it and the impregnated layers of paper at least one xanthene dye Rhodamine With an intermediate layer of pressed wood composite material with the following content of components in it, parts by weight:

Juniper sawdust Juniperus communis 'Columnaris'  50-75 pine needles Pinus pumila  25-35

In another embodiment, the ratios (parts) are changed (parts by weight) for sawdust and needles:

Juniper sawdust Juniperus communis 'Columnaris' 80-90 pine needles Pinus pumila 50-70

or

Juniper sawdust Juniperus communis 'Columnaris' 50-75 pine needles Pinus pumila 50-75

BSP consists of sheets (package) of kraft paper, which are impregnated in bathtubs or automatic impregnation machines with synthetic resin, in particular MMFP. As options, MFP-2 or PMF resin can be chosen as the resin (PMF is recommended for the manufacture of synthetic sheet veneer in plants with high temperature conditions).

A protective layer of barrier paper, an underlay, is placed on top of a package of kraft paper sheets. As a barrier paper, bag paper (base) is used, on which a two-layer barrier coating is applied - a barrier lacquer. Various types of sack paper can be used as a base, but it is preferable to use “stretchable” kraft paper.

Between the protective layer and the impregnated layers of paper, there is one (the number of layers can be from one to five, depending on the purpose of the BSP), an intermediate layer of pressed wood composite material impregnated with the xanthene dye Rhodamine C (alternatively, Rhodamine J can be used as a dye or C), with the following content of components in it, parts by weight, shown in the table.

Components one 2 3 Juniper sawdust Juniperus communis 'Columnaris' 50-75 80-90 50-75 pine needles Pinus pumila 25-35 50-70 50-75

After the impregnation of the layers, the layers are dried, followed by cutting and assembling the bag, after which the pressing or molding of complex products begins, followed by heat treatment with hot air (140 ° C-180 ° C) at a continuous pressure provided by the clamping shafts (4-10 MPa), or infrared rays, followed by processing the back side on the roughing machines using an endless abrasive tape.

Claims (3)

1. Laminated paper, characterized in that it includes a pressed-in package of sheet layers of kraft paper impregnated with an MMFP resin, at least one layer of barrier paper and at least one intermediate layer impregnated with xanthene dye Rhodamine C interposed between it and the paper layers pressed wood composite material with the following content of components in it, parts by weight:
Juniper sawdust Juniperus communis 'Columnaris' 50-75 pine needles Pinus pumila 25-35 2. Laminated paper, characterized in that it includes a pressed-in package of sheet layers of kraft paper impregnated with MMFP resin, at least one layer of barrier paper and at least one intermediate layer impregnated with xanthene dye Rhodamine C interposed between it and the paper layers pressed wood composite material with the following content of components in it, parts by weight:
Juniper sawdust Juniperus communis 'Columnaris' 80-90
pine needles Pinus pumila 50-70 3. Laminated paper, characterized in that it includes a pressed-in package of sheet layers of kraft paper impregnated with MMFP resin, at least one layer of barrier paper and at least one intermediate layer impregnated with xanthene dye Rhodamine C interposed between it and the paper layers pressed wood composite material with the following content of components in it, parts by weight:
Juniper sawdust Juniperus communis 'Columnaris' 50-75 pine needles Pinus pumila 50-75