A method of manufacturing a solid fiberboard


(57) Abstract:

Usage: to obtain a firm wood-fiber plates in the wet. The inventive ground wood pulp is diluted with water to a predetermined concentration. From the obtained suspension casting machine molded fibrous Mat and subjected to hot pressing. Pressed material is impregnated with the melt mixture of raffinate and concentrate polyfunctional oxidized compounds within a specified time. The treated plate is subjected to heat treatment. table 2.

The invention relates to woodworking, timber and pulp and paper industry and can be used in the production of environmentally friendly solid wood-fibre boards (MDF) in the wet.

A method of obtaining a solid fiberboard (MDF) using the concentrate of unsaponifiable substances sulfate soap, which is as follows: wood-fibre pulp, obtained from a mixture of softwood and hardwood in excellent machine form the carpet, which is then cut, the resulting billet is pressed at a temperature of 180oC with the subsequent drawing on outprespace at a temperature of 165oC for 4 h, the ratio of the fibre mass and unsaponifiable matter (%), equal to (88-98):(2-12).

The main disadvantage of this method is inefficient use of concentrate unsaponifiable substances sulfate soap, which is a complex substance and contains valuable biologically active substances, which can be used for the production of medicinal products, food supplements and cosmetics.

The task of the invention to provide a solid fiberboard with a minimum of environmental pollution and sustainable use of components of neutral substances, which are the waste in the processing of neutral substances with the aim of obtaining biologically active compounds; betulin, sterols, polyprenols and squalene.

In the processing of neutral substances hardwood sulfate soap by successive crystallization and filtration of the solution neutral compounds in hydrocarbon solvent receive betulin and sterols, and isolated from the filtrate residual neutral substances are obtained concentrate polyprenols and squalene by extraction aprotic polar solution is ntrat polyfunctional oxidized compounds (PIC). The raffinate is a mixture of aliphatic alcohols C22-C28and residual hydrocarbons, polyprenols C35-C40, triterpene alcohols, 24 methylenecycloartanol, betulin, alpha-sitosterol and beta-sitosterol. Concentrate polyfunctional oxidized compounds (PIC) is a complex mixture of oxidized high molecular weight compounds containing various functional groups, carbonyl, carboxyl and alcohol - viscous resinous product is a reddish-brown color.

This task is solved in that milled wood fibrous mass of a mixture of deciduous (80%) and coniferous (20%) wood diluted with water to 1.0% concentration. From the obtained suspension casting machine to form wood-fiber carpet and expose his hot pressing at 190oC. the Extruded material is impregnated with at 90-120oC a melt containing a mixture of raffinate and the VILLAGE; the raffinate; concentrate polyfunctional oxidized compounds (PIC). Consumption impregnating composition 3-10% by weight of absolutely dry plate. The treated plate was subjected to heat treatment at 160-165oC within 3.5-4 hours

In the manufacture of fiberboard used in this method iskluchiteno and forth in the waste water, since eliminated their use. The same chemical compounds that are included in a sealing compound, insoluble in water. It should also be noted that the components of neutral substances nelituji in the process of heat treatment plates and they do not experience air pollution.

Obtained in this way fiberboard does not contain toxic chemical compounds can be released into the environment in the course of their operation.

Applying a sealing composition on the basis of neutral substances sulfate soap in quantity is less than 3% is not possible to obtain a stable strength and hydrophobic properties of fiberboard, the collapse of the impregnating composition of more than 10% inappropriate due to some small improvement of physico-mechanical properties of fiberboard and economic reasons, the invention is illustrated by the following examples.

Example 1. Milled wood weight of a mixture of deciduous (80%) and coniferous (20% ) wood, dilute with water to 1.0% concentration. From the obtained suspension casting machine molded fibrous Mat and put it under hot pressing at 190oC. the Extruded material is impregnated with at 90-120oC in the melt mixture of Rafiah to 7.0% by weight of absolutely dry /A. from./ plate. The treated plate was subjected to heat treatment at 160-165oC within 3.5-4 hours

Example 2. All the techniques are similar to example 1, but the impregnation is carried raffinate at a rate of 10% by weight.with. plate.

Example 3. The method is carried out analogously to example 1, but the impregnation is carried concentrate polyfunctional oxidized compounds in the amount of 8% by weight.with. plate.

Example 4. The method is carried out analogously to example 1, but the impregnation are a mix of RAF and SETTLEMENT in the amount of 3% by weight.with. plate.

In table. 1 shows data on group composition and processing products source neutral substances.

The test results fiberboard on the proposed method are presented in table. 2.

A method of manufacturing a solid hardboard, including molded carpet from wood pulp, extrusion, impregnation and heat treatment, characterized in that the impregnation implement waste recycling neutral substances hardwood sulfate soap in the amount of 3 - 10% of absolutely dry plate, representing the raffinate on the basis of aliphatic alcohols WITH22WITH28and residual hydrocarbons, polyprenols WITH


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