SE436330B - SET TO REDUCE THE QUANTITY OF FREE FORMALDEHYDE IN CARBAMID HEART BOND SPAN - Google Patents
SET TO REDUCE THE QUANTITY OF FREE FORMALDEHYDE IN CARBAMID HEART BOND SPANInfo
- Publication number
- SE436330B SE436330B SE7908455A SE7908455A SE436330B SE 436330 B SE436330 B SE 436330B SE 7908455 A SE7908455 A SE 7908455A SE 7908455 A SE7908455 A SE 7908455A SE 436330 B SE436330 B SE 436330B
- Authority
- SE
- Sweden
- Prior art keywords
- free formaldehyde
- ammonium
- ammonium compounds
- ammonia
- reduce
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N7/00—After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity
- B27N7/005—Coating boards, e.g. with a finishing or decorating layer
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Description
vsoanss-up 5 2 av en termiskt sönderdelbar ammoniumförening, varpå skivorna staplas för mognadslagringm Skivorna i stapeln har härvid normalt en temperatur av 40-70°C. Under mognadslagringen, som vanligen försiggår 2 dygn, sönderdelas ammoniumföreningen och avger ammoniakgas, vilken tränger in i skivorna. Efter mognads- lagringen går skivorna som förut till formatsâgning och slip- ning. Skivorna, som i övrigt är till sina egenskaper oför- ändrade, innehåller nu avsevärt mindre mängd fri formaldehyd. vsoanss-up 5 2 of a thermally decomposable ammonium compound, whereupon the disks stacked for maturation storagem The disks in the stack have here normally a temperature of 40-70 ° C. During ripening storage, which usually takes 2 days, the ammonium compound decomposes and emits ammonia gas, which penetrates into the discs. After maturation storage, the discs go as before to format sawing and grinding ning. The discs, which are otherwise incompatible in their properties changed, now contains significantly less free formaldehyde.
I enlighet med det ovan sagda har sättet enligt upp- finningen de i krav 1 angivna kännetecknen.In accordance with the above, the method according to the characteristics specified in claim 1.
Med hänsyn till den normala temperaturen under mognads- lagringen används som ammoniumföreningar företrädesvis sådana som vid 40-70°C avger ammoniak i väsentlig grad. Speciellt föredragna föreningar är ammoniumvätekarbonat och ammonium- karbonat, eventuellt i kombination med ammoniumacetat för sänkning av pH. Den använda ammoniumföreningen får givetvis ej vara explosiv och den får ej heller vid sin sönderdelning ge oacceptabla restjoner eller föreningar.Taking into account the normal temperature during ripening the storage is used as ammonium compounds preferably such which at 40-70 ° C emits ammonia to a significant degree. Especially preferred compounds are ammonium bicarbonate and ammonium carbonate, optionally in combination with ammonium acetate for lowering the pH. The ammonium compound used may, of course must not be explosive and must not decompose on its own give unacceptable residues or compounds.
Ammoniumföreningarna kan appliceras exempelvis i pulver- form eller i form av en vattenlösning, vilken företrädesvis är koncentrerad.The ammonium compounds can be applied, for example, in powder form or in the form of an aqueous solution, which is preferably is concentrated.
En klar sänkning av halten fri formaldehyd uppnås i all- mänhet redan vid 5 g ammoniumsalt / m2. Företrädesvis an- vänds minst 10 g / m2. I allmänhet uppnås endast marginella ytterligare förbättringar genom ökning av halten över 40-Sö g / m2. Samtliga mängder är härvid beräknade på 15 mm skivor.A clear reduction in the free formaldehyde content is generally achieved. already at 5 g ammonium salt / m2. Preferably used turned at least 10 g / m2. In general, only marginal is achieved further improvements by increasing the content above 40-Sun g / m2. All quantities are calculated on 15 mm discs.
Uppfinningen kommer i det följande att illustreras när- mare av ett antal utföringsexempel, vilka samtliga är ut- förda med spânskivor av storleken 500 x 500 mm.The invention will be illustrated in the following. of a number of embodiments, all of which are lined with chipboard of the size 500 x 500 mm.
- Exempel 1 Spânskivor med tjockleken 12 mm belades med finpulvri- serad ammoniumkarbonat, 10 g / mg staplades och lagrades 48 timmar vid 60°C temperatur.Example 1 Particle boards with a thickness of 12 mm were coated with fine powder ammonium carbonate, 10 g / mg were stacked and stored 48 hours at 60 ° C temperature.
Exempel 2 Spânskivor med tjockleken 12 mm belades med finpulvri- serad ammoniumkarbonat, 20 g / m2, staplades och lagrades 19084554» 48 timmar vid 60°C temperatur.Example 2 Particle boards with a thickness of 12 mm were coated with fine powder ammonium carbonate, 20 g / m 2, was stacked and stored 19084554 » 48 hours at 60 ° C temperature.
Exemgel 3 Spånskivor med tjockleken 16 mm belades med finpulvri- serad ammoniumkarbonat, 15 g / m2, staplades och lagrades 48 timmar vid 40°C temperatur. _ Exemgel 4 Spânskivor med tjockleken 16 mm besprutades med vatten- lösning av 20 g ammoniumkarbonat i 100 g lösning och belades med 50 g lösning / m2, staplades och lagrades 48 timmar vid 60°C temperatur.Exemgel 3 Particle boards with a thickness of 16 mm were coated with fine powder ammonium carbonate, 15 g / m 2, was stacked and stored 48 hours at 40 ° C temperature. _ Exemgel 4 Panels with a thickness of 16 mm were sprayed with water solution of 20 g of ammonium carbonate in 100 g of solution and coated with 50 g solution / m2, stacked and stored for 48 hours at 60 ° C temperature.
Exemgel 5 Spånskivor med tjockleken 16 mm besprutades med en vatten- lösning av 20 g ammoniumkarbonat i 100 g vatten och belades med 100 g lösning / m2, staplades och lagrades 48 timmar vid 60°C temperatur.Example 5 Particle boards with a thickness of 16 mm were sprayed with an aqueous solution of 20 g of ammonium carbonate in 100 g of water and coated with 100 g solution / m2, stacked and stored for 48 hours at 60 ° C temperature.
Exemgel 6 Spånskivor med tjockleken 16 mm besprutades medken vattenlösning av 16 g ammoniumkarbonat och 4 g ammonium- acetat i 100 g lösning och belades med 100 g lösning / m2, staplades och lagrades 48 timar vid 60°C temperatur.Example 6 Particle boards with a thickness of 16 mm were sprayed with wood aqueous solution of 16 g of ammonium carbonate and 4 g of ammonium acetate in 100 g solution and coated with 100 g solution / m2, were stacked and stored for 48 hours at 60 ° C.
Vid samtliga försök bestämdes efter konditionering halten fri formaldehyd enligt FESYP-perforatormetod (British I Standard 1811). På en del av proven mättes svällning, tvär- draghållfasthet och böjhållfasthet enligt DIN 68761. Som referensprov användes motsvarande enbart värmebehandlade och konditionerade skivor. Varje försök utfördes med sex skivor.In all experiments, the content was determined after conditioning free formaldehyde according to the FESYP perforator method (British I Standard 1811). In some of the samples, swelling, transverse tensile strength and flexural strength according to DIN 68761. Som reference samples were used correspondingly only heat-treated and conditioned discs. Each experiment was performed with six discs.
Mätresultaten återges i nedanstående tabell. 7908115541 H Tabell Skiv- Lagr. ' Tvär- Böj- Fri Exempel tjock- g salt temp. Svälln. drag- hållf. formal- lek 2 o ' hâllf. dehyd 'mm / m C MPa Ma vikt-% 1 12 10 60 0,016 2 12 20 60 0,011 3 16 15 40 I 0,75 17,0 0,012 4 16 10 60 , 0,35 16,0 0,017 5 16 20 60 , 0,36 18,8 0,012 6 16 20_ '60 0,013 Ref 1 12 0 60 0,032 Ref 2 16 0 60 8,6 0,32 17.2 0,030The measurement results are given in the table below. 7908115541 hrs Chart Disc Storage. 'Cross- Bend- Free Example thick- g salt temp. Swell. traction hold. formal lek 2 o 'half. dehyd 'mm / m C MPa Ma wt% 1 12 10 60 0.016 2 12 20 60 0.011 3 16 15 40 I 0.75 17.0 0.012 4 16 10 60, 0.35 16.0 0.017 5 16 20 60, 0.36 18.8 0.012 6 16 20_ '60 0.013 Ref 1 12 0 60 0.032 Ref 2 16 0 60 8.6 0.32 17.2 0.030
Claims (3)
Priority Applications (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7908455A SE436330B (en) | 1979-10-11 | 1979-10-11 | SET TO REDUCE THE QUANTITY OF FREE FORMALDEHYDE IN CARBAMID HEART BOND SPAN |
| FI803093A FI70686C (en) | 1979-10-11 | 1980-09-30 | SAINT ATT MINSKA EMISSIONEN AV FORMALDEHYD FRAON KARBAMIDHARTSBUNDNA SPAONSKIVOR |
| EP80106013A EP0027583B1 (en) | 1979-10-11 | 1980-10-03 | A method of reducing the emission of formaldehyde from particle board bound with carbamide resin |
| DE8080106013T DE3067363D1 (en) | 1979-10-11 | 1980-10-03 | A method of reducing the emission of formaldehyde from particle board bound with carbamide resin |
| AT80106013T ATE6940T1 (en) | 1979-10-11 | 1980-10-03 | PROCESS FOR REDUCING THE FORMALDEHYDE RELEASE FROM AMINOPLAST BONDED CHIPBOARD. |
| ZA00806205A ZA806205B (en) | 1979-10-11 | 1980-10-08 | A method of reducing the emission of formaldehyde from particle board bound with carbamide resin |
| CA000361994A CA1160416A (en) | 1979-10-11 | 1980-10-08 | Method of reducing the emission of formaldehyde from particle board bound with carbamide resin |
| NO803028A NO161045C (en) | 1979-10-11 | 1980-10-10 | PROCEDURE FOR AA REDUCE THE EMISSION OF FORMALDEHYDE FRACARBAMIDHARPIQUE-BONDS. |
| DK428580A DK155178C (en) | 1979-10-11 | 1980-10-10 | PROCEDURE FOR REDUCING EMISSION OF FORMAL CINDS FROM CARBAMID RESIN-BOUND CHIPS |
| ES495806A ES495806A0 (en) | 1979-10-11 | 1980-10-10 | A METHOD OF REDUCING THE FORMALDEHYDE EMISSION OF A BOARD OF PARTICLES AGGLOMERATED WITH CARBAMIDE RESIN |
| JP14234980A JPS5678966A (en) | 1979-10-11 | 1980-10-11 | Method of lowering generation of aldehyde from particle board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7908455A SE436330B (en) | 1979-10-11 | 1979-10-11 | SET TO REDUCE THE QUANTITY OF FREE FORMALDEHYDE IN CARBAMID HEART BOND SPAN |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE7908455L SE7908455L (en) | 1981-04-12 |
| SE436330B true SE436330B (en) | 1984-12-03 |
Family
ID=20339045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7908455A SE436330B (en) | 1979-10-11 | 1979-10-11 | SET TO REDUCE THE QUANTITY OF FREE FORMALDEHYDE IN CARBAMID HEART BOND SPAN |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS5678966A (en) |
| SE (1) | SE436330B (en) |
| ZA (1) | ZA806205B (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3781638A (en) * | 1972-06-28 | 1973-12-25 | Gen Electric | Power supply including inverter having multiple-winding transformer and control transistor for controlling main switching transistors and providing overcurrent protection |
| JPS515027A (en) * | 1974-06-29 | 1976-01-16 | Ono Gijutsu Kenkyusho Jugen | SEIDENGEN ZOSOCHI |
| JPS5925654B2 (en) * | 1977-08-08 | 1984-06-20 | 永大産業株式会社 | Manufacturing method of particle board |
-
1979
- 1979-10-11 SE SE7908455A patent/SE436330B/en not_active IP Right Cessation
-
1980
- 1980-10-08 ZA ZA00806205A patent/ZA806205B/en unknown
- 1980-10-11 JP JP14234980A patent/JPS5678966A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| SE7908455L (en) | 1981-04-12 |
| JPS5678966A (en) | 1981-06-29 |
| ZA806205B (en) | 1981-10-28 |
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