SU478743A1 - A method of manufacturing fibreboard - Google Patents
A method of manufacturing fibreboardInfo
- Publication number
- SU478743A1 SU478743A1 SU1991143A SU1991143A SU478743A1 SU 478743 A1 SU478743 A1 SU 478743A1 SU 1991143 A SU1991143 A SU 1991143A SU 1991143 A SU1991143 A SU 1991143A SU 478743 A1 SU478743 A1 SU 478743A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- fibreboard
- manufacturing
- manufacturing fibreboard
- acetic anhydride
- fiber
- Prior art date
Links
Landscapes
- Dry Formation Of Fiberboard And The Like (AREA)
Description
1one
Изобретение относитс к технологии древесноволокнистых плит и может быть применено в деревообрабатывающей промышленности .The invention relates to the technology of fibreboard and can be applied in the woodworking industry.
Известны способы изготовлени древесноволокнистых плит из волокон, модифицированных посредством ацетилировани уксусным ангидридом, путем их сушки и прессовани .Methods are known for producing fiberboard from fibers modified by acetylation with acetic anhydride by drying and pressing them.
Цель изобретени - повышение прочностных показателей.The purpose of the invention is to increase the strength characteristics.
Достигаетс это тем, что после ацетилировани уксусным ангидридом воздушно-сухое волокно пропитывают 2-7%-ным раствором гексаметилендиизоцианата в ацетоне и удал ют нагреванием последний.This is achieved by the fact that after acetylation with acetic anhydride, the air-dry fiber is impregnated with a 2-7% solution of hexamethylenediisocyanate in acetone and removed by heating the latter.
Осуш:ествл ют способ следующим образом. Древесное волокно обрабатывают уксусным ангидридом при температуре ацетилировапи волокна 100-120°С в течение 1-6 час. Затем ацетилированное волокно сушат в течениеDrying: The method is as follows. Wood fiber is treated with acetic anhydride at a temperature of acetylrope fiber 100-120 ° C for 1-6 hours. The acetylated fiber is then dried for
2.2
2-4 час при 110°С. Высушенное ацетилированное волокно пропитывают 2-7%-ным раствором гексаметилендиизоцианата в ацетоне и прессуют при 170-190°С в течение 2- 7 мин. Полученные плиты обладают следующими показател ми: предел прочности на изгиб 414 кг/см, разбухание в воде по толщине 5,8%.2-4 hours at 110 ° C. Dried acetylated fiber is impregnated with 2-7% solution of hexamethylene diisocyanate in acetone and pressed at 170-190 ° C for 2-7 minutes. The resulting plates have the following indicators: flexural strength of 414 kg / cm, swelling in water through the thickness of 5.8%.
Предмет изобретени Subject invention
Способ изготовлени древесноволокнистых плит из волокон, модифицированных посредством ацетилировани уксусным ангидридом,A method of manufacturing fiberboard from fibers modified by acetylation with acetic anhydride,
путем их сушки и прессовани , отличающийс тем, что, с целью повышени прочностных показателей, после ацетилировани уксусным ангидридом воздушно-сухое волокно пропитывают 2-7%-ным раствором гексаметилендиизоцианата в ацетоне и удал ют нагреванием последний.by drying and pressing, characterized in that, in order to increase the strength properties, after acetylation with acetic anhydride, the air-dry fiber is impregnated with 2-7% solution of hexamethylene diisocyanate in acetone and removed by heating the latter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1991143A SU478743A1 (en) | 1974-01-28 | 1974-01-28 | A method of manufacturing fibreboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1991143A SU478743A1 (en) | 1974-01-28 | 1974-01-28 | A method of manufacturing fibreboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU478743A1 true SU478743A1 (en) | 1975-07-30 |
Family
ID=20574169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1991143A SU478743A1 (en) | 1974-01-28 | 1974-01-28 | A method of manufacturing fibreboard |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU478743A1 (en) |
-
1974
- 1974-01-28 SU SU1991143A patent/SU478743A1/en active
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