CN1132728C - Manufacture of composite wood board with conducting function - Google Patents
Manufacture of composite wood board with conducting function Download PDFInfo
- Publication number
- CN1132728C CN1132728C CN 99122281 CN99122281A CN1132728C CN 1132728 C CN1132728 C CN 1132728C CN 99122281 CN99122281 CN 99122281 CN 99122281 A CN99122281 A CN 99122281A CN 1132728 C CN1132728 C CN 1132728C
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- wooden unit
- conduction
- wooden
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- aquadag powder
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Abstract
The present invention relates to a manufacturing method of one class of composite wood plates, and the aim is to obtain a wood composite plate having the functions of electromagnetic wave shielding and anti-static electric conduction. The function of electromagnetic wave shielding is realized by a separated and laminated structure formed by mixtures of electrically conductive additives and adhesives and a wood unit, and the function of anti-static electric conduction is realized by the fact that a thickness layer containing electrically conductive additives is coated at both sides of a mixed blank of the wood unit and the adhesives. Therefore, plates with different resistivity can be obtained according to requirements, the present invention has low release quantity of free aldehyde and can not pollute environment, and simultaneously, strength and natural grain of the plates can also be kept.
Description
Technical field
The present invention relates to the manufacture method of a class composite wood board.
Background technology
At present, traditional composite wood board is composited by wooden unit (veneer, wood shavings, fiber etc.) and binder resin (urea aldehyde, phenolic aldehyde etc.).Indoor design condition is down because the specific insulation of wood materials and binder resin is respectively 10
9～10
12With 10
12～10
13Ohmcm so the sheet material after compound still belongs to the insulator category, belongs to good electrical insulator during use.
Shielding electromagnetic wave or anlistatig conducting function wood materials have abroad appearred having, as: Japan Patent JP8148804A, JP51004596A and JP55015047B; Make cement, timber, resin, paper surface conduction production method, owing to only relate to material surface, and do not relate to base material, static capacity is little, and is black; And for example: Japan Patent JP63303731A, JP62273805A and JP5909476A etc., utilize metal material (as: powder, fiber, salt, solution, paper tinsel) to reach the conducting function of wood materials, still; Common Lauxite or phenolic resins can not make itself and lignocellulosic reach good bonding; And high performance epoxy resin or isocyanates, cost height not only, and irony equipment also produced serious bonding consequence, technologic adaptability is relatively poor, be difficult to by instructions for use controlling resistance rate, and service time one is long shield effectiveness decline (annual decline 5 decibels); Also, utilize the wood materials high temperature carbonization to reach conductive effect just like Japan Patent JP7100986A and JP59147494A, complex process, cost is higher, do not have the compound comprehensive function of lamination, and shield effectiveness is poor; In addition, as U.S. Pat 4906484A, Japan Patent JP5185406A, JP5177610A, utilize mix that carbon particle, furnace black, pot are black, graphite, tar etc. realize still, whole base materials being carried out conductive processing by conducting function, antistatic cost is higher.
Summary of the invention
In view of this, the manufacture method that the purpose of this invention is to provide a kind of composite wood board with conducting function, it is the laminated construction that adds material, wooden unit and binder resin with conduction, can control the different resistivity that require quantitatively, the plate surface cleaning helps follow-up decoration processing simultaneously.
The object of the present invention is achieved like this: a kind of manufacture method of composite wood board with conducting function, and the step of its manufacturing is divided into: 1) timber subdivision, timber rotary-cut or slicing become Monoplacophora essence unit; 2) heat drying; It is characterized in that: step 3) is executed conduction and is added material, this conduction is added material and is mixed by the thin aquadag powder of the chopped carbon fiber of 0.5mm～4mm, 15 microns thick aquadag powder, 4 microns middle aquadag powder and 1 micron and forms, and described chopped carbon fiber accounts for 2～10 of every square metre of wooden unit and restrains; Described thick aquadag powder accounts for 5～15 grams of every square metre of wooden unit, and described middle aquadag powder accounts for 20～50 grams of every square metre of wooden unit, and described thin aquadag powder accounts for 20～15 grams of every square metre of wooden unit; After mixing with Lauxite or aerodux then, be coated with again and impose on wooden cell surface; Order is carried out again; 4) assembly moulding forms alternate laminated construction with the wooden unit of multilayer; 5) last, hot pressing forms sheet material.
A kind of manufacture method of composite wood board with conducting function, the step of its manufacturing is divided into: 1) timber subdivision is timber or its residue, non-wood plant fibre raw material subdivision the wooden unit of section, wood shavings and fibre bundle; 2) dried, classified; 3) applying glue mixes Lauxite or aerodux and waterproofing agent and wooden unit; It is characterized in that: step 4) is executed conduction and is added material, and this conduction is added material mainly with surfactant and carbon series elements composition, and wherein surfactant refers to antistatic additive; This antistatic additive is cationic, nonionic, and the carbon series elements is the aquadag powder, and described cationic antistatic additive is the quaternary class, accounts for 2.0%～5.0% of wooden unit weight; Described nonionic is antistatic and be glycerine, accounts for 20%～5.0% of wooden unit weight; Described aquadag powder accounts for 1.0～4.0% of wooden unit weight; This conduction is added material mixes with the wooden unit of applying glue; 5) moulding of mating formation is the wooden unit formation of applying glue a blank, and thereon, lower surface is provided with the wooden elementary layer that conduction is added material of executing of thickness 1mm～5mm; 6) last, hot pressing forms sheet material.
Owing to adopt such scheme: can obtain the sheet material of different resistivity on request, and free aldehyde burst size is low, can produce and pollute, keep the intensity and the native texture of original sheet material simultaneously to environment.
Description of drawings
Fig. 1 is the first embodiment of the invention block diagram.
Fig. 2 is the second embodiment of the invention block diagram.
The specific embodiment
Be described further this friend is bright below in conjunction with drawings and Examples.
First embodiment as shown in Figure 1, is used to shield the manufacture method of electromagnetic composite wood board with conducting function, and its step is as follows:
1. timber subdivision:, be split into the wooden unit of Monoplacophora promptly timber rotary-cut or slicing.
2. heat drying:, be that drying medium carries out drying to wooden unit with the highest 180 ℃ hot-air by the first moisture content of wooden unit; Or in the hot plate of 90～105 ℃ of temperature, pressure 0.4～0.5MPa, wooden unit is carried out drying.The moisture content of wooden unit, dry back reduces to 5%～8%.
3, execute conduction and add material: comprise chopped carbon fiber (0.5mm～4mm), 2～10g/m
2(optimum value 3g/m
2); Thick aquadag powder (15 microns), 5～15g/m
2(optimum value 10g/m
2); Middle aquadag powder (4 microns), 20～50g/m
2(optimum value 50g/m
2); Thin aquadag powder (1 micron), 5～15g/m
2(optimum value 10g/m
2);
Above-mentioned conduction is added hot setting adhesives such as material and Lauxite, phenolic resins (applied amount 180～300g/m, Lauxite need add curing agent ammonium chloride a little) through an amount of aqueous diluent diluted mixture evenly after, be coated with and impose on wooden cell surface.
4. assembly moulding: conduction is added the mixture of material and binder resin; Form alternate laminated construction with the wooden unit of multilayer.
5. be hot pressed into plate: under 105～140 ℃ of temperature, pressure 0.8～1.4MPa, form the composite wood board with conducting function finished product.
The electromagnetic composite wood board with conducting function of the shielding of making as stated above, 12～13 decibels of its shield effectiveness (, Electromagnetic Interference or pollution intensity can be decayed 90%) to be example for 20 decibels to frequency 1.5GHZ shielding electromagnetic waves usefulness.
Second embodiment as shown in Figure 2, is used for the manufacture method of anlistatig composite wood board with conducting function, and its step is as follows:
1. timber subdivision: promptly adopt timber or its residue, non-wood plant fibre raw material (shrub, agricultural crop straw, straw etc.) slicing or grinding method to form section, wood shavings and fiber wooden unit such as (bundles).
2. dried, classified: by the first moisture content of wooden unit, be drying medium, wooden unit is dried to moisture content 2%～6% with the highest 180～250 ℃ hot-air; Adopt the sieve method sorting, promptly by 3mm * 3mm screen cloth, stay the wooden unit on 0.4mm * 0.4mm screen cloth.
3. applying glue: hot setting adhesives such as Lauxite, phenolic resins (applied amount 6%～12%, Lauxite need add curing agent ammonium chloride a little), waterproofing agent (paraffin or paraffin wax emulsions applied amount 0.5%～1.0%) are sprayed in all wooden cell surfaces (promptly mixing with wooden unit).
4. execute conduction and add material: this conduction is added material and mainly is made up of surfactant (as: antistatic additive) and carbon series elements.From the wooden unit of above-mentioned applying glue, take out a part, this conduction is added material spray with it and mix.
Antistatic additive comprises cationic and nonionic, and its content is:
Cationic (the quaternary class is as the basic quaternary ammonium nitrate of dimethyl stearyl hydroxyl, trihydroxyethyl methyl quaternary ammonium Methylsulfate etc.), 2.0%～5.0% (optimum value 3.9%);
Nonionic (polyalcohol is as glycerine etc.), 2.0%～5.0% (optimum value 3.6%);
The carbon series elements is the aquadag powder, 1 micron of granularity, and its content is 1.0%～4.0% (optimum value 1.9%).
Antistatic additive and carbon series elements account for 5%～14% of wooden unit weight, this conduction add material can by cationic antistatic additive, non-ionic antistatic agent, aquadag powder spray separately or mix after spray.
5. the moulding of mating formation: is the wooden unit formation of applying glue blank, and thereon, lower surface is provided with the wooden elementary layer that conduction is added material of executing of thickness 1mm～5mm.
6. be hot pressed into plate: under 140～180 ℃ of temperature, pressure 2.5～5.0MPa, form the composite wood board with conducting function finished product.
The anlistatig composite wood board with conducting function that makes as stated above, at moisture content 6%～8% o'clock its specific insulation from common sheet material 〉=10
10Ohmcm reduces to≤and 10
8Ohmcm.
In sum, the present invention can by apply conduction add material amount and with the shielding electromagnetic wave or the antistatic effect of the superimposed structure control composite board in wooden unit; Thereby realize the large-scale quantified controlling of resistivity.
Claims (2)
1, a kind of manufacture method of composite wood board with conducting function, the step of its manufacturing is divided into: 1) timber subdivision, timber rotary-cut or slicing become the wooden unit of Monoplacophora; 2) heat drying; It is characterized in that: step 3) is executed conduction and is added material, this conduction is added material and is mixed by the thin aquadag powder of the chopped carbon fiber of 0.5mm～4mm, 15 microns thick aquadag powder, 4 microns middle aquadag powder and 1 micron and forms, and described chopped carbon fiber accounts for 2～10 of every square metre of wooden unit and restrains; Described thick aquadag powder accounts for 5～15 grams of every square metre of wooden unit, and described middle aquadag powder accounts for 20～50 grams of every square metre of wooden unit, and described thin aquadag powder accounts for 20～15 grams of every square metre of wooden unit; After mixing with Lauxite or aerodux then, be coated with again and impose on wooden cell surface; Order is carried out again; 4) assembly moulding forms alternate laminated construction with the wooden unit of multilayer; 5) last, hot pressing forms sheet material.
2, a kind of manufacture method of composite wood board with conducting function, the step of its manufacturing is divided into: 1) timber subdivision is timber or its residue, non-wood plant fibre raw material subdivision the wooden unit of section, wood shavings and fibre bundle; 2) dried, classified; 3) applying glue mixes Lauxite or aerodux and waterproofing agent and wooden unit; It is characterized in that: step 4) is executed conduction and is added material, and this conduction is added material mainly with surfactant and carbon series elements composition, and wherein surfactant refers to antistatic additive; This antistatic additive is cationic, nonionic, and the carbon series elements is the aquadag powder, and described cationic antistatic additive is the quaternary class, accounts for 2.0%～5.0% of wooden unit weight; Described nonionic is antistatic and be glycerine, accounts for 20%～5.0% of wooden unit weight; Described aquadag powder accounts for 1.0～4.0% of wooden unit weight; This conduction is added material mixes with the wooden unit of applying glue; 5) moulding of mating formation is the wooden unit formation of applying glue a blank, and thereon, lower surface is provided with the wooden elementary layer that conduction is added material of executing of thickness 1mm～5mm; 6) last, hot pressing forms sheet material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99122281 CN1132728C (en) | 1999-11-09 | 1999-11-09 | Manufacture of composite wood board with conducting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99122281 CN1132728C (en) | 1999-11-09 | 1999-11-09 | Manufacture of composite wood board with conducting function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1294959A CN1294959A (en) | 2001-05-16 |
| CN1132728C true CN1132728C (en) | 2003-12-31 |
Family
ID=5282410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99122281 Expired - Fee Related CN1132728C (en) | 1999-11-09 | 1999-11-09 | Manufacture of composite wood board with conducting function |
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| Country | Link |
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| CN (1) | CN1132728C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102717568A (en) * | 2012-06-28 | 2012-10-10 | 常州市天润木业有限公司 | Antistatic compact grade laminate and preparation method thereof |
| CN102786685B (en) * | 2012-08-08 | 2014-02-26 | 东华大学 | Preparation method for conductive timber |
| CN103707383A (en) * | 2013-12-19 | 2014-04-09 | 广西大学 | Method for manufacturing composite fiber boards with electromagnetic shielding function |
| CN103978524B (en) * | 2014-05-04 | 2016-06-08 | 南京林业大学 | There is wood-based plate and the manufacture method thereof of electro-magnetic screen function |
| CN104175381B (en) * | 2014-08-04 | 2016-11-16 | 中国林业科学研究院木材工业研究所 | A kind of fibre board with electro-magnetic screen function and preparation method thereof |
| CN104149154A (en) * | 2014-08-13 | 2014-11-19 | 中国林业科学研究院木材工业研究所 | Manufacturing method for glue-free electromagnetic shielding fiber board |
| CN104690804B (en) * | 2015-02-14 | 2017-07-18 | 广西丰林木业集团股份有限公司 | A kind of manufacture method of electro-magnetic screen function fiberboard |
| CN104985668A (en) * | 2015-06-24 | 2015-10-21 | 南通亚振东方家具有限公司 | Fiber wood with electromagnetic shielding function and preparation method thereof |
| TW201813713A (en) * | 2016-09-23 | 2018-04-16 | 鐠適保實業股份有限公司 | Cycle wood and forming method thereof formed by solidifying multiple fibrous materials and a mediating agent that is coated on the surface of the fibrous materials |
| CN107263642B (en) * | 2017-08-12 | 2019-07-23 | 南京林业大学 | A kind of antistatic wood decorative material and its manufacturing method |
| CN113882610A (en) * | 2021-11-15 | 2022-01-04 | 怀化大隆农业科技有限公司 | Antistatic bamboo wood decorative board |
-
1999
- 1999-11-09 CN CN 99122281 patent/CN1132728C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1294959A (en) | 2001-05-16 |
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Granted publication date: 20031231 Termination date: 20161109 |