CN1128695A - Method for reducing formaldhyde diffusion from fibreboard by vacuum treatment method - Google Patents
Method for reducing formaldhyde diffusion from fibreboard by vacuum treatment method Download PDFInfo
- Publication number
- CN1128695A CN1128695A CN 95111142 CN95111142A CN1128695A CN 1128695 A CN1128695 A CN 1128695A CN 95111142 CN95111142 CN 95111142 CN 95111142 A CN95111142 A CN 95111142A CN 1128695 A CN1128695 A CN 1128695A
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- vacuum
- board
- tank
- reducing
- vacuum treatment
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- Chemical And Physical Treatments For Wood And The Like (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
It is a method for decreasing the emitting of formaldehyde in the artificial board (including veneer board, shaving board and medium density fibre board). It is a vacuum treatment method. Its characteristics lies in that the thermal pressed artificial boards re piled up in the vacuum tank, and the temp. in the tank is kept about 40 deg.C, the tank is vacuumized with vacuum pump and kept for a period of time. The emitting content of formaldehyde can lower down by 20% after the board is treated by said method.
Description
The present invention relates to a kind of method that reduces the artificial board formaldehyde emission---vacuum processing method.
In the method for the reduction artificial board formaldehyde emission of having made public, mainly comprise chemical treatment method and physical treatment method two big classes, as reducing the adhesive mol ratio; In adhesive, add formaldehyde catching agent; Production board after the hot pressing is carried out chemical liquid spray processing; To becoming plate to carry out edge sealing, veneer processing etc., but there is the processing cost height in most methods, is difficult to realize weak points such as suitability for industrialized production or treatment effect be not ideal enough.
The objective of the invention is to avoid above-mentioned weak point of the prior art and a kind of method that reduces the artificial board formaldehyde emission with application of vacuum is provided.
Purpose of the present invention can reach by following measure:
A kind of method that reduces the artificial board formaldehyde emission with application of vacuum, it is characterized in that after wood-based plate is finished hot pressing, plank is placed vacuum tank, in keeping jar temperature between 35 ° of C～45 ℃, with vavuum pump with (vacuum P=6.27 * 10 that are evacuated in the jar
4Pa～6.93 * 10
4And kept 30～40 minutes Pa).
The present invention has following advantage compared to existing technology:
The present invention is simple to operate, and cost is low, and effect is obvious, when reducing the plank formaldehyde emission, the mechanical strength of plank is not had a negative impact.
Fig. 1 is a vacuum treatment device schematic diagram of the present invention.
Provide embodiments of the invention below in conjunction with accompanying drawing:
After glued board, particieboard or medium density fibre board (MDF) 3 (with Lauxite as adhesive) are finished operations such as hot pressing cutting edge, stacking also pushes it in cylindrical vacuum tank 1, make a jar interior temperature remain on 40 ℃ by heating tube 2, with vavuum pump 4 with (vacuum P=6.6 * 10 that are evacuated in the jar
4Pa), kept 30 minutes.Can make the formaldehyde emission amount of plank reduce about 20% with method of the present invention, but the quality index such as MOR, elastic modelling quantity and internal bond strength of plank are not had influence.
Claims (3)
1, a kind of method that reduces the artificial board formaldehyde emission with application of vacuum, it is characterized in that after wood-based plate is finished hot pressing, plank is placed vacuum tank, in keeping jar temperature between 35 ℃～45 ℃, with vavuum pump with (vacuum P=6.27 * 10 that are evacuated in the jar
4Pa～6.93 * 10
4And kept 30～40 minutes Pa).
2, the method with application of vacuum reduction artificial board formaldehyde emission according to claim 1 is characterized in that temperature is 40 ℃ in the vacuum tank, vacuum P=6.6 * 10
4Pa.
3, the method with application of vacuum reduction artificial board formaldehyde emission according to claim 1 and 2 is characterized in that vacuum tank is cylindrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95111142A CN1044791C (en) | 1995-08-07 | 1995-08-07 | Method for reducing formaldhyde diffusion from fibreboard by vacuum treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95111142A CN1044791C (en) | 1995-08-07 | 1995-08-07 | Method for reducing formaldhyde diffusion from fibreboard by vacuum treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1128695A true CN1128695A (en) | 1996-08-14 |
| CN1044791C CN1044791C (en) | 1999-08-25 |
Family
ID=5078455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95111142A Expired - Fee Related CN1044791C (en) | 1995-08-07 | 1995-08-07 | Method for reducing formaldhyde diffusion from fibreboard by vacuum treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1044791C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100335253C (en) * | 2001-05-03 | 2007-09-05 | 克隆纳斯板技术有限公司 | Method for reducing formaldehyde content and formaldehyde emission from particleboard |
| CN103612295A (en) * | 2013-12-05 | 2014-03-05 | 南京林业大学 | Method of manufacturing aldehyde-free plywood through cellulose modified soybean gum |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1099237A (en) * | 1993-08-25 | 1995-03-01 | 张醒义 | Lotus nutrient solution |
-
1995
- 1995-08-07 CN CN95111142A patent/CN1044791C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100335253C (en) * | 2001-05-03 | 2007-09-05 | 克隆纳斯板技术有限公司 | Method for reducing formaldehyde content and formaldehyde emission from particleboard |
| CN103612295A (en) * | 2013-12-05 | 2014-03-05 | 南京林业大学 | Method of manufacturing aldehyde-free plywood through cellulose modified soybean gum |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1044791C (en) | 1999-08-25 |
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |