RO107228B1 - Process and composition for plasticizing and peeling of wood materials - Google Patents

Abstract

The process for plasticization and decaying of wood materials consists of in the preparation and heating of a composition chemical, consisting of 0.00 ... 0.25% carbonate of sodium, by weight or by volume 0,00 ... 0,40% sodium sulphite, dissolved in an amount of up to 100% water, and keeping the batch with wood, at a temperature of of the solution at 44 DEG-98 DEG C. for 2 ... 78 hours function of essence, destination and thickness wood material.

Description

The invention relates to a process and a composition of plasticizing and peeling of wood materials, such as, for example, wires for braids, logs for supply, curved movable parts, which aims to reduce the consumption of thermal energy, shorten the cycle on the load and improve it. quality of products.

For the purpose of plasticizing and peeling wood materials, it is known the possibility of hydrotechnical treatment of them in running water, using various types of installations, tanks, basins, autoclaves with loading before the start of the process of heating or boiling water from the basin, basin or autoclave. this process is realized with high energy consumption in long cycle, with insufficient plasticization, with high load of water in fiber and heavy peeling, which is why subsequent drying is done with high energy consumption, with high technological losses, with color alteration and corrosion of the tanks. basins or autoclaves.

The problem solved by the invention is the plasticization of wood materials for peeling, bending, rolling or cutting.

The process of boiling the wood materials according to the invention eliminates the above disadvantages, in that, for the purpose of plasticizing and peeling, the wood materials are hydrothermically treated in a neutral sodium sulfite (Na2CO3) chemical solution, for example, or the like. materials with similar properties, after having previously been scoured in the basin, basin or autoclave, effect obtained by introducing plasticizing batches at a solution temperature of 44 ... 98 ° C, depending on the essence, the destination and the thickness of the wood material .

By applying the invention, the following advantages are obtained:

- reducing the thermal energy consumption by 70 ... 80%;

- reducing boiling time by 70 to 80%;

- improvement of the laminate;

- peeling with reduced technological losses;

- the energy consumption is reduced when the finished product is dried;

- does not alter the color;

- protects the tank against corrosion;

- increasing labor productivity.

I give examples of application of the invention.

In a first embodiment, the process of plasticizing the flakes into a scalding chemical solution is carried out in three phases, as follows:

Phase I Preparation and heating of the chemical composition, consisting of 0.00 ... 0.25% sodium carbonate in the mixture, with or without 0.00 ... 0.40% neutral sodium sulfite, dissolved in an amount of up to 100% water, the solution having 7 ... 9.

Phase II-α The scouring, the insertion of the saddle with the pipes in the solution in the tank, at a temperature of 85 ... 98 ° C.

Phase of HI-α Keeping the flakes in the pan at the boiling temperature

80 .. .98 ° C, for 3.5 ... 4.5 h, the solution having pH 7 ... 9.

In the second example of the application of the invention, the process of plasticizing the logs for supply and the wood elements for curved furniture in chemical solution with scraping is carried out in three phases as follows:

Phase I Preparation and heating of the chemical solution, consisting of 0.00 ... 0.25% sodium carbonate, with or without 0.00 ... 0.40% neutral sodium sulfite, dissolved in an amount of up to 100% water, the solution having a pH of 7 ... 9.

Phase irea Scraping, insertion of wood material sieve into the solution from the basin or autoclave at a temperature of

45 .. .98 ° C.

Phase III-α Keeping the wood in the basin or autoclave at the temperature of the boiling mode 7O ... 98 ° C, for 2 ... 10 h for curved furniture elements and

24 .. .78 h for veneer logs, the solution having a pH of 7 ... 9.

The second and subsequent saija are made only in two phases, the și and the ΠΙ, correcting the pH and the level of the solution in the basin, which is reused.

Claims (2)

Claims 5 1. Process for laminating and peeling of wood materials, wool, logs, elements of curved furniture, characterized in that in phase I a chemical solution is prepared and heated, in phase ș the batch of wood material is introduced and kept at tem10 the temperature of the boiling regime, respectively at 8O ... 98 ° C, for 3.5 ... 4.5 h, for the pies, at 7O ... 98 ° C, for 24 ... 78 h, for logs and 7O ... 98 ° C, during 2 ... 10 h, for curved furniture elements. 2. A composition for carrying out the plasticizing process according to claim 1, characterized in that it is composed of 0.00 ... 0.40% sodium sulphite, dissolved in an amount of up to 100% water, having a pH. 7 ... 9.