PL424449A1 - Method for producing boards, preferably building boards with reduced density - Google Patents
Method for producing boards, preferably building boards with reduced densityInfo
- Publication number
- PL424449A1 PL424449A1 PL424449A PL42444918A PL424449A1 PL 424449 A1 PL424449 A1 PL 424449A1 PL 424449 A PL424449 A PL 424449A PL 42444918 A PL42444918 A PL 42444918A PL 424449 A1 PL424449 A1 PL 424449A1
- Authority
- PL
- Poland
- Prior art keywords
- layers
- boards
- central
- core layer
- reduced density
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title 1
- 239000010410 layer Substances 0.000 abstract 6
- 239000012792 core layer Substances 0.000 abstract 3
- 239000002023 wood Substances 0.000 abstract 2
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 239000011230 binding agent Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
Landscapes
- Dry Formation Of Fiberboard And The Like (AREA)
- Laminated Bodies (AREA)
Abstract
Sposób wytwarzania płyt, zwłaszcza budowlanych o obniżonej gęstości w jakim z wiórów drzewnych wymieszanych ze spoiwem, korzystnie klejem pMDI formuje się co najmniej trzy warstwy o zróżnicowanej grubości tak, że warstwa centralna - rdzeniowa jest co najmniej dwukrotnie grubsza od warstw zewnętrznych, a udział wagowy warstw zewnętrznych korzystnie równy jest wadze warstwy centralnej-rdzeniowej, po czym uformowane wstępnie warstwy wprowadza się do zimnej prasy i tłoczy się płyty utrzymując nacisk nie mniejszy niż 1,2 MPa przez co najmniej 10 s, a następnie wprowadza się do nagrzanej prasy i wywiera nacisk co najmniej 1,5 MPa, ogrzewa przez co najmniej 10 sekund i nie więcej niż 30 sekund przypadających na mm grubości płyty, charakteryzuje się tym, że wióry drzewne mają gęstość nasypową od 150 do 220 kg/m3, wilgotność warstwy wiórów tworzących warstwę centralną - rdzeniową wynosi nie więcej niż 8%, a wilgotność warstw zewnętrznych jest większa niż 25%.A method of producing panels, especially construction with reduced density, in which wood chips mixed with the binder, preferably with pMDI adhesive, at least three layers of varying thickness are formed, so that the central - core layer is at least twice as thick as the outer layers, and the weight proportion of the layers external is preferably equal to the weight of the central-core layer, after which the preformed layers are introduced into a cold press and the plates are pressed, maintaining a pressure of not less than 1.2 MPa for at least 10 s, and then introduced into the heated press and exerts at least 1.5 MPa, heats for at least 10 seconds and no more than 30 seconds per mm of board thickness, characterized by the fact that wood chips have a bulk density of 150 to 220 kg / m3, humidity of the chip layer forming the central - core layer is not more than 8%, and the humidity of the outer layers is greater than 25%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL424449A PL238989B1 (en) | 2018-01-31 | 2018-01-31 | Method for producing boards, preferably building boards with reduced density |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL424449A PL238989B1 (en) | 2018-01-31 | 2018-01-31 | Method for producing boards, preferably building boards with reduced density |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL424449A1 true PL424449A1 (en) | 2019-08-12 |
| PL238989B1 PL238989B1 (en) | 2021-10-25 |
Family
ID=67549923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL424449A PL238989B1 (en) | 2018-01-31 | 2018-01-31 | Method for producing boards, preferably building boards with reduced density |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL238989B1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1116054A (en) * | 1965-06-10 | 1968-06-06 | Max Himmelheber | Multi-layer wood material boards |
| AT407507B (en) * | 1997-12-18 | 2001-04-25 | Oesterreichische Homogenholz G | WOOD CHIPBOARD WITH HIGH BENDING STRENGTH AND HIGH BENDING E-MODULE |
| US20040103616A1 (en) * | 2000-05-25 | 2004-06-03 | Herlyn Johann W. | Panel-shaped composite wooden element |
| PL386304A1 (en) * | 2008-10-17 | 2010-04-26 | Politechnika Warszawska | Method of manufacturing of the laminar-and-partial wood-derivative composite |
-
2018
- 2018-01-31 PL PL424449A patent/PL238989B1/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1116054A (en) * | 1965-06-10 | 1968-06-06 | Max Himmelheber | Multi-layer wood material boards |
| AT407507B (en) * | 1997-12-18 | 2001-04-25 | Oesterreichische Homogenholz G | WOOD CHIPBOARD WITH HIGH BENDING STRENGTH AND HIGH BENDING E-MODULE |
| US20040103616A1 (en) * | 2000-05-25 | 2004-06-03 | Herlyn Johann W. | Panel-shaped composite wooden element |
| PL386304A1 (en) * | 2008-10-17 | 2010-04-26 | Politechnika Warszawska | Method of manufacturing of the laminar-and-partial wood-derivative composite |
Also Published As
| Publication number | Publication date |
|---|---|
| PL238989B1 (en) | 2021-10-25 |
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