CN100382897C - Mosistureproof and waterproof processing method for wood material deep-processing product - Google Patents
Mosistureproof and waterproof processing method for wood material deep-processing product Download PDFInfo
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- CN100382897C CN100382897C CNB2004100235183A CN200410023518A CN100382897C CN 100382897 C CN100382897 C CN 100382897C CN B2004100235183 A CNB2004100235183 A CN B2004100235183A CN 200410023518 A CN200410023518 A CN 200410023518A CN 100382897 C CN100382897 C CN 100382897C
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Abstract
The present invention relates to a moistureproof and waterproof processing method for a wood material deep-processing product. The present invention has the main following technological steps that (1) a wood material is used as a raw material; (2) the wood material is processed into a finished product with a needed shape; (3) a sealing agent is coated on a specific surface of the finished product; (4) the sealing agent is prepared by diphenylmethane diisocyanate (MDI, 4, 4'-diphenylmethane diisocyanate) and solvent. The finished product made by the method has the advantages of reliable waterproof and moistureproof effect and high durability.
Description
Technical Field
The invention relates to the technical field of building decoration materials, in particular to a moisture-proof and waterproof processing method for a deep-processed finished product of a wood material, which is mainly used for a laminate flooring.
Background
The floor is a commonly used decorative material in house decoration, and the impregnated paper laminated wood floor is commonly called as a laminate wood floor, a diamond plate and the like, has wide market and user groups, and is not reduced in growth momentum.
The surface layer of the laminate flooring is durable and has excellent waterproof and moistureproof performances, but the base material at the splicing rabbet of the laminate flooring is exposed and becomes a weak point for preventing moisture and releasing free aldehyde. The white latex glue joint tongue-and-groove is usually used in floor installation, but the moisture-proof problem of the laminate flooring is not fundamentally solved. Along with the development of the laminate flooring, the lock-catch type splicing and glue-free mounting modes are widely applied, the moisture-proof problem of the exposed part of the laminate flooring substrate draws attention, although some measures such as waxing, oil immersion, painting and the like are adopted, the connection of waterproof substances and the substrate in the measures is mainly physical connection, and the moisture-proof and waterproof effects and the durability are not ideal enough.
Disclosure of Invention
The invention aims to provide a moisture-proof and waterproof processing method for a deep-processed finished product of a wood material.
The main process steps of the invention are as follows: (1) selecting a wood material raw material; (2) processing to obtain the final product with required shape; (3) coating a sealing agent on a specific surface of a finished product; (4) the blocking agent is prepared from diphenylmethane diisocyanate (MDI, 4, 4' -diphenylmethane diisocyanate) and a solvent.
After the sealing agent is coated on the surface of a finished product, diphenylmethane diisocyanate (MDI, 4, 4' -diphenylmethane diisocyanate) can quickly permeate and diffuse into the interior of a finished product plate under the action of a solvent, and reacts with cellulose, lignin and moisture in the finished product plate to form firm chemical bond combination, so that sealing is formed at the coating part, and the two main chemical reactions are as follows:
(1) reaction with hydroxyl groups in the cellulose, lignin structure of the woody material to form covalent bonds (urethane bonds):
wherein R is alkyl, aryl, etc., the same as below.
(2) Reacting with moisture in the wood material to form polyurea;
wherein: n is more than or equal to 1
Meanwhile, polyurea containing isocyanate end groups reacts with a wood material to generate a polymer;
the reaction of diphenylmethane diisocyanate with the hydroxyl group-containing compound may be carried out at a temperature in the range of from room temperature to 100 ℃ in the absence of a catalyst. Secondly, the amide group formed in the reaction is further reacted with diisocyanate to form a urethane group, and the formed urethane group has an accelerating effect on the reaction (namely, the reaction between the wood fiber and the MDI has an autocatalytic effect).
Polyurea formed in the reaction plays a good filling role for the wood material, so that the material of the coating part is more compact.
Therefore, compared with the prior art, the invention has the following remarkable advantages: (1) the sealant and the wood material form chemical combination, so that the moisture-proof and waterproof effects are remarkable, and the durability is good; (2) the strength and the hardness of the plate at the coating position can be improved, and the release of free aldehyde is further reduced; (3) the sealant can quickly permeate and diffuse into the finished plate after being coated, and can be immediately packaged or used after being coated without waiting for drying or curing, and secondary pollution can not be generated, so that the sealant can be used after being coated, and is simple, convenient and efficient. (4) Oil-soluble dyes or pigments may be added to achieve coloration while coating.
Detailed Description
The main process steps of the invention are as follows: (1) selecting a wood material as a raw material; (2) processing to obtain the final product with required shape; (3) coating a sealing agent on a specific surface of a finished product; (4) the blocking agent is prepared from diphenylmethane diisocyanate (MDI, 4, 4' -diphenylmethane diisocyanate) and a solvent.
The formula of the sealant is as follows: MDI (30-80%) + solvent (70-20%). In the specific preparation process, oil-soluble dye or pigment can be added into the sealant, so that the sealant can be colored while being coated.
The above solvent is a volatile organic solvent such as butanone which has low toxicity, is insoluble in water, has good permeability and diffusivity, and does not react with MDI.
In practical application, the finished product can be a laminate flooring, and the surface of the substrate exposed at the splicing rabbet of the laminate flooring is coated with the sealant. Comprising: the moisture-proof and waterproof effects are obvious, and the durability is good; the strength and the hardness of the rabbet are improved, and the release of free aldehyde is reduced; the coating can be used after coating, and is simple, convenient and efficient; the advantages of coating, coloring and the like can be realized at the same time.
The invention has novel conception, simple and convenient process, economy and applicability and great popularization and application value.
Claims (4)
1. A moisture-proof and waterproof processing method for deep-processed finished products of wood materials mainly comprises the following processing steps: selecting a wood material as a raw material, and processing the raw material into a finished product with a required shape; coating a sealing agent on a specific surface of a finished product; the formula of the sealant is as follows: 30-80% of diphenylmethane diisocyanate and 70-20% of a solvent; the solvent is a volatile organic solvent which has low toxicity, is insoluble in water, has good permeability and diffusivity, and does not react with diphenylmethane diisocyanate.
2. The moisture-proof and waterproof processing method of the deep-processed wooden material finished product according to claim 1, characterized in that: the oil-soluble dye or pigment is added into the sealant, and the coloring is realized while the coating is carried out.
3. The moisture-proof and waterproof processing method of the deep-processed wooden material finished product according to claim 1 or 2, characterized in that: the solvent is butanone.
4. The moisture-proof and waterproof processing method of the deep-processed wooden material finished product according to claim 3, characterized in that: the typical product in the finished product is a laminate flooring, and the surface of the base material exposed at the splicing rabbet of the laminate flooring is coated with the sealant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100235183A CN100382897C (en) | 2004-01-10 | 2004-01-10 | Mosistureproof and waterproof processing method for wood material deep-processing product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100235183A CN100382897C (en) | 2004-01-10 | 2004-01-10 | Mosistureproof and waterproof processing method for wood material deep-processing product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1640555A CN1640555A (en) | 2005-07-20 |
| CN100382897C true CN100382897C (en) | 2008-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100235183A Expired - Fee Related CN100382897C (en) | 2004-01-10 | 2004-01-10 | Mosistureproof and waterproof processing method for wood material deep-processing product |
Country Status (1)
| Country | Link |
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| CN (1) | CN100382897C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108481473B (en) * | 2018-05-25 | 2023-11-21 | 南京林业大学 | Manufacturing method of laminated veneer lumber with high added value |
| CN110984510B (en) * | 2019-12-20 | 2021-11-05 | 深圳市奇信集团股份有限公司 | Damp-proof treatment method for laminate flooring |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314446A (en) * | 2000-03-17 | 2001-09-26 | 雅马哈株式会社 | Adhesion agent |
| JP2002206080A (en) * | 2001-01-11 | 2002-07-26 | Sumika Bayer Urethane Kk | Cross-linking agent composition for water based polymer- isocyanate wood adhesive |
-
2004
- 2004-01-10 CN CNB2004100235183A patent/CN100382897C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314446A (en) * | 2000-03-17 | 2001-09-26 | 雅马哈株式会社 | Adhesion agent |
| JP2002206080A (en) * | 2001-01-11 | 2002-07-26 | Sumika Bayer Urethane Kk | Cross-linking agent composition for water based polymer- isocyanate wood adhesive |
Non-Patent Citations (1)
| Title |
|---|
| 定向刨花板用MDI胶粘剂-ICI公司MDI胶粘剂应用介绍. 李远陵，金珏民.木材工业，第11卷第4期. 1997 * |
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| Publication number | Publication date |
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| CN1640555A (en) | 2005-07-20 |
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Granted publication date: 20080423 Termination date: 20180110 |