CN101391432A - No-formaldehyde density board - Google Patents
No-formaldehyde density board Download PDFInfo
- Publication number
- CN101391432A CN101391432A CNA2008101221519A CN200810122151A CN101391432A CN 101391432 A CN101391432 A CN 101391432A CN A2008101221519 A CNA2008101221519 A CN A2008101221519A CN 200810122151 A CN200810122151 A CN 200810122151A CN 101391432 A CN101391432 A CN 101391432A
- Authority
- CN
- China
- Prior art keywords
- powder
- density board
- product
- formaldehyde
- sawdust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Abstract
The invention discloses a non-formaldehyde density board. Sawdust powder is dried, then is mixed with polypropylene powder and calcium carbonate powder as well as white oil to granulate, through at least two granulating, then is again grinded to powder, at last is molded in a die through hot press molding. The strength of the product is superior to a common density board, the product is not easy to deform and absorb water, and the waterproof performance is good. Because no adhesive is used, the harmful chemical substance is not contained in the composition, and the product has the advantage of environmental protection.
Description
Technical field
The present invention relates to construction material, particularly to the improvement of density board,
Background technology
At present in the widely used density board in construction and decoration field, be with sawdust powder and adhesive mixing compression moulding, because inevitable benzene, the formaldehyde equal solvent of using in the adhesive, make remaining harmful chemicals such as the benzene of higher dosage, formaldehyde in the present density board, especially formaldehyde, because volatility is big, after sheet material is fitted up in the house, easily human body is caused damage.
Summary of the invention
The object of the invention is to provide a kind of density board of not using adhesive to make, does not contain harmful chemical substance in the composition, is beneficial to environmental protection.
The solution of the present invention is: no-formaldehyde density board is with sawdust powder oven dry and polypropylene powder, Paris white, white oil mixing granulation, through at least twice granulation, is ground into powder again, and is hot-forming in mould at last.
The part by weight of each component is: sawdust powder 45-55%, polypropylene powder 25-35%, Paris white 10-20%, white oil 5-8%.
Advantage of the present invention is: because polypropylene fusing back produces bonding force to sawdust powder, play the effect that substitutes former adhesive, avoided the use adhesive, do not contain harmful chemical substance in the composition, have the advantage of environmental protection.
The specific embodiment
The invention will be further described according to embodiment below.
The manufacturing process of embodiment is:
1. sawdust powder is through screening, particle≤1mm.
2. with the sawdust powder oven dry, make its water content≤20%.
3. with 15 parts in calcium carbonate, 50 parts of above-mentioned sawdust powder, 30 parts of polypropylene powders, add white oil and mix for 5 parts, use the plastic granulator granulation.
4. the particle after the granulation is crushed to particle≤1mm with ball mill.
5. granulation once more, pulverizing.
6. the material after will pulverizing is poured in the mould hot-forming, and mold temperature 210-250 ℃, pressure 2.5-3.5MPa, time 3-6min.
7. last packing.
Product surface is paster if desired, can lay in advance in mould, can become firm integral body after extruding.
This product strength is better than common density board, and is not yielding, is difficult for suction, good waterproof performance.
Claims (1)
- No-formaldehyde density board, be that sawdust powder is dried, with polypropylene powder, Paris white, white oil mixing granulation, through at least twice granulation, be ground into powder again, hot-forming in mould at last, the part by weight of each component is: sawdust powder 45-55%, polypropylene powder 25-35%, Paris white 10-20%, white oil 5-8%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101221519A CN101391432A (en) | 2008-11-10 | 2008-11-10 | No-formaldehyde density board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101221519A CN101391432A (en) | 2008-11-10 | 2008-11-10 | No-formaldehyde density board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101391432A true CN101391432A (en) | 2009-03-25 |
Family
ID=40492041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101221519A Pending CN101391432A (en) | 2008-11-10 | 2008-11-10 | No-formaldehyde density board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101391432A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102085684B (en) * | 2009-12-02 | 2012-07-11 | 刘二东 | Environmentally-friendly synergic additive for wood fiber density board and using method thereof |
-
2008
- 2008-11-10 CN CNA2008101221519A patent/CN101391432A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102085684B (en) * | 2009-12-02 | 2012-07-11 | 刘二东 | Environmentally-friendly synergic additive for wood fiber density board and using method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090325 |