SU1034901A1 - Method of producing laminated wood plastics - Google Patents

Abstract

i, THE METHOD OF MAKING WOODEN LAYERED PLASTICS, including impregnating the veneer in a heated phenol-formaldehyde resin solution, drying the veneer and assembling it into a bag and pressing, is different because in order to reduce solvent consumption, the solution is heated to 35-40 "c. impregnation of veneer - for 5-15 minutes, and the phenol-formaldehyde resin used 40-48% concentration. 2. The method according to p. "1, characterized by the fact that phenol-formaldehyde resin is taken in the ratio of phenol; formahyde: and ammonia-100: 3744: 5-6 wt. H

Description

00

4 WITH

FIELD OF THE INVENTION The invention relates to woodworking woodworking, in particular, to the production of wood laminated plguits.

A known method of manufacturing wood plastics / consisting of the impregnation of the veneer, its drying and assembly of the bag, and pressing.

There is also known a method for manufacturing wood composite plastics, which involves the impregnation of veneer in a heated ratvibre phenol-formaldehyde resin, drying the veneer and assembling it into a bag and. pressing 2,

A disadvantage of the known methods is the high solvent of the resin; j

The purpose of the invention is to reduce solvent consumption.

The goal is achieved by the fact that, according to the method, the solution is heated to 35–40 ° C, and the veneer is impregnated for 5–15 minutes, and a 40–48% concentration is used for fiol-formaldehyde resin.

In addition, phenol-formaldehyde resin is taken in the ratio of phenol: formaldehyde: and ammonia-100: 37-44: 56 wt.h.

The proposed method for the manufacture of wood laminates was tested under laboratory conditions of the Central Scientific Research Institute of Physics and Technology. Four samples of wood laminated plastics were prepared according to the known and proposed methods, moreover, Fenopf (rmaldehyde resin was taken different, concentration and viscosity, (see table). In each solution, the veneer was soaked for 5, 10, 15, 60 min tipH solution 35 temperature C in the proposed method, I., in a known method. Then the veneer was dried in a co-heater dryer to a moisture content of 3-6%. The dry veneer was collected in bags according to the DSP-B plastic sbsfki scheme, pressed at 150F; 2C. And pressure 15.0 MPa at a shutter speed of 5 min / km thickness. Plastic poured 15 mm thick. The physical and mechanical properties of the finished plastic were determined, the results of the EXPERIMENTS are given in the table.

2 $ -51

1.5-4.0 40-48 1., 5-4.0

40 44

0 2.6

48

1.5

60 5-15

I

15 10

five

1300 2.4 255 157 274

TS DENSITY ;.

& W - water absorption in 24 hours;

GA — tensile strength along the fibers;

compressive strength with compression along the fibers;

 tensile strength with static bending along the fibers;

ac - toughness when bending along the fibers of the damaged layer;

T ..- ultimate strength {and ska; sewing adhesive layer.

WITH - . - For each version, 6 laminated wood tiles of 400x400 mm format are made.35

From the data in the table it can be seen that on the physicomechanical properties of wood laminate made according to the proposed continuation of the table

7,8

78

So, it complies with the requirements of TAST 1391.3-78 Plastic laminated plastics, and does not require the use of expensive 1 ti deficient solution, which, when evaporated, pollutes the environment, and also shortens the time of the technological process. Cessa. .

Claims (2)

Ϊ. METHOD FOR PRODUCING WOOD LAMINATED PLASTICS, including impregnating veneer in a heated solution of phenol-formaldehyde resin, drying the veneer and assembling it into a bag and pressing, characterized in that, in order to reduce solvent consumption, the solution is heated to 35-40 ° C, and the veneer is impregnated for 5-15 minutes, and the phenol-formaldehyde resin is used at a 40-48% concentration. 2. The method according to p. 1, characterized in that the phenol-formaldehyde resin is taken in the ratio phenol: formaldehyde: and ammonia-100! 3744: 5-6 wt.h. >