SU501890A1

SU501890A1 - The method of obtaining fiberboard

Info

Publication number: SU501890A1
Application number: SU2057619A
Authority: SU
Inventors: Гута Бенциановна Элькина; Альбина Александровна Пиргач; Давид Соломонович Жук; Петр Александрович Гембицкий
Original assignee: Всесоюзный Научно-Исследовательский Институт Деревообрабатывающей Промышленности
Priority date: 1974-09-05
Filing date: 1974-09-05
Publication date: 1976-02-05

Description

добавл 0,5%-ный раствор МПЭИ в количестве 0,25% от веса .волокна.add 0.5% solution of MPEI in the amount of 0.25% by weight of fiber.

Параллельно получают плиты без введени МПЭИ.In parallel, plates are prepared without the introduction of MPEI.

В табл. 1 приведены результаты испытани лолучелных ллит.In tab. 1 shows the results of testing loluchel litas.

Т а б л II ц а 1T a b l II c a 1

пропиточной машине. Температура гор чего прессовани 160-210° С, т. е. диапазон расширен в сторожу снижени . Введение МПЭИ в .Количестве 0,1 -1,0% в березовую и осиновую дефибраторную массу приводит к значительному увеличению прочности плит, улучшению гидрофобных свойств с одновременным уменьшением загр знени сточиых вод (см. табл. 2).impregnating machine. The temperature of hot pressing is 160-210 ° C, i.e. the range is expanded to lower the caretaker. The introduction of MPEI in a quantity of 0.1-1.0% into the birch and aspen defibrator mass leads to a significant increase in the strength of the plates, an improvement in the hydrophobic properties with a simultaneous decrease in the pollution of wastewater (see Table 2).

Т а б л II ц а 2T a b l II c a 2

Claims

Note and e. Flexural strength of superhard plates 500 ": g / sl" 2 (according to GOST 4598-60). Example 3. Example 1 is repeated. 0.5% solution of MPEI in the amount of 0.25% by weight of the mass, and hot pressing is carried out at 160, 180, 200 ° C for 8 minutes. In parallel, plates are prepared without the introduction of MPEI. The swelling and water absorption at 160, 180 and 200 ° C for the plates obtained using our options is 26.5, 28.5 and 25.5% and 39.6, 38.7 and 37.6%, respectively. For plates obtained without the introduction of the MPEI, the indicated values are 160, 180, and 200% and 160, 160, and 200%, respectively. For the production of superhard fibreboard, the process of forming and hot pressing is similar to that in the manufacture of fibreboard. The process of impregnation of plates in the claims of the invention is excluded. A method of producing fibreboard of hardwood by processing a defibrator mass with a paraffin emulsion, carpet pouring, hot pressing, characterized in that with the aim of improving the physicomechanical indicators of the plates while simplifying the process technology and reducing pollution waste water, a 0.6% solution of polyethylenimine modified with, for example, polyacrylamide with a molecular weight is introduced into the mass before the paraffin emulsion is treated. 50,000 m in an amount of 0.1 -1.0% by weight of absolutely dry fibers, and pressing is carried out at 160-180 ° C.