CN105690528A - Method for improving surface evenness of solid board - Google Patents
Method for improving surface evenness of solid board Download PDFInfo
- Publication number
- CN105690528A CN105690528A CN201410710738.7A CN201410710738A CN105690528A CN 105690528 A CN105690528 A CN 105690528A CN 201410710738 A CN201410710738 A CN 201410710738A CN 105690528 A CN105690528 A CN 105690528A
- Authority
- CN
- China
- Prior art keywords
- board
- flaggy
- surface smoothness
- fiberboard
- solid wood
- 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
Links
Abstract
The invention discloses a method for improving the surface evenness of a solid board. The method for improving the surface evenness of the solid board is characterized in that fiberboard/particle board layers are additionally arranged on an original board layer, and the manufacturing method for the fiberboard/particle board layers comprises the following steps that S1, the fiberboard/particle board layers are prepared, specifically, separated wood fiber or fiber bundles are processed through a waterproof adhesive, and the waterproof adhesive is a mixture of alkali lignin extracted through acidification and an urea-formaldehyde resin adhesive; and S2, the fiberboard/particle board layer fiber processed through the waterproof adhesive is put into a mold frame on the original board layer, flattened, pre-pressed and then subjected to hot repressing to obtain the fiberboard/particle board layers which are attached to the original board layer, and polishing treatment is conducted. Due to the fact that the steps of waterproofing treatment and press fit for the fiberboard/particle board layers are added, the surface evenness of the solid board is greatly improved through the high evenness of the fiberboard/particle board layers and is the same with a reinforced composite board; and meanwhile, all the advantages of a solid reinforced board are also retained, and the defect that the reinforced composite board is not resistant to water is overcome.
Description
[technical field]
The present invention relates to a kind of method improving solid wood board surface smoothness, the method especially improving the surface smoothness of solid wooden floor board, Furniture manufacture plate etc.。
[background technology]
The sheet materials such as existing floor, Furniture manufacture plate mainly have wood composite board and reinforced composite board two kinds。
Solid wood composite board is formed by the sheet material crosswise lamination set, the shortcoming overcoming the unidirectional same sex of solid wooden floor board, and drying shrinkage bulking factor is little, has good dimensional stability, and remains the natural wood veins of solid wooden floor board and comfortable feel。Being all textured and fault of construction due to natural timber, ratio is if any knot, insect pest, crackle etc., and these defects can cause board surface out-of-flatness, and affecting attractive in appearance even affects use。Processing these defects, the cost of required cost is high, wants to process completely to be nearly impossible。Currently used method is to increase an outer layer, and outer layer is to cover board surface with relatively soft ply (such as poplar thin slice) to carry out suppressing and form relatively even curface。Though this kind of method can improve the flatness on surface, but the limitation of its improvement, because these outer layer plys itself are also difficult to avoid that defects in timber。
Reinforced composite board is made up of wearing layer, decorative layer, basic unit, balance layer, and wherein basic unit is the MDF (medium density fibre board (MDF)) adopting lumber fibre to make, and it is timber first to be made fiber, and then compacting forms again。Owing to being first break the whole up into parts timber then to reshape, in the process making fiber, abolish the knot on timber, insect pest and crackle etc., thus its strengthening plate surface smoothness ultimately formed is relatively good。But owing to originally complete timber is broken into fiber, greatly reduce its water resistance, and make water-proofing treatment difficulty become big, thus strengthening plate is difficult to be made splash guard。If processing with glue or chemical medicinal liquid by force, not only making high must being difficult to of cost bear, and making the content overproof of formaldehyde；Owing to glue or liquid medicine are immersed in every plate fiber so that the release of formaldehyde becomes a very long process, form the infringement that user human body and use environment is lasting。Current way is to adopt balance layer to carry out moisture-barrier, it is prevented that basic unit makes moist。But protection against the tide can not solve root problem, sheet material is once suffer that blister is with regard to unrepairable。This plate also has some shortcomings, it is simply that feel is poor, wear-resisting bad, and content of formaldehyde is also high relative to solid wooden compound floor。
Therefore, how making solid wood composite board have the flatness of the reinforced composite board that matches in excellence or beauty, the shortcoming not having again reinforced composite board, is the long-term insurmountable problem of industry one。
[summary of the invention]
In order to overcome the deficiencies in the prior art, the present invention provides a kind of method improving solid wood board surface smoothness, makes the sheet material prepared while keeping the advantage of solid wood composite board, has higher surface smoothness。
The method improving solid wood board surface smoothness of the present invention, it is characterized in that increase fibre board/wood shavings flaggy on log flaggy, described fibre board/wood shavings flaggy is to make as follows: S1, the wood fibre separated or fibre bundle are carried out marine glue process, and described marine glue is the alkali lignin that extracts of acidifying and the mixture of urea-formaldehyde resin adhesive；S2, the fiber processed through marine glue put on log flaggy framed, pave, precompressed, hot repressing obtains fitting to the fibre board/wood shavings flaggy of log flaggy；S3, it is processed by shot blasting；On fibre board/wood shavings flaggy, wherein go back pressing finish coat。
The invention has the beneficial effects as follows: owing to adding water-proofing treatment and the pressing step of fibre board/wood shavings flaggy, utilize the high planarization of fibre board/wood shavings flaggy, the flatness making plate surface is greatly promoted, reach the peer-level of reinforced composite board, also remain again the various advantages of solid-wood reinforced board, it is to avoid composite reinforced board can not the shortcoming of waterproof simultaneously。
[accompanying drawing explanation]
Fig. 1 is the complex intensifying floor schematic diagram after utilizing the method in the embodiment of the present invention to improve flatness。
[detailed description of the invention]
As it is shown in figure 1, the solid-wood composite strengthened plates in the embodiment of the present invention includes log flaggy 1, MDF layer 2 and finish coat 3, wear-resisting or fireprotection layer 4 can also be included as required。Each layer is respectively described below:
1) log flaggy 1: the timber of log flaggy is mainly with Eucalyptus, it is possible to adopt Malacca wood, Zelkova schneideriana Hand.-Mazz., birch, weedtree, poplar etc.。This layer is formed by multiple sublayers laminating lamination again, and centrally located sublayer adopts cross waves, and namely between each sublayer, lumber grain intersects or arranged vertically；The connected two-layer being positioned at outside adopts rift grain, and namely two sub-interlayer lumber grain directions are identical, it is therefore an objective to strengthen flatness, it is ensured that low warpage；Each sublayer itself can be formed by log material compacting, or can be formed by rounding；Between sublayer, glue used can be routine environment-friendlyadhesive adhesive, such as E1 glue or E0 glue etc., it is also possible to the special internal layer marine glue of the present invention: it is the alkali lignin and urea-formaldehyde resin adhesive that extract with the acidifying of weight ratio 20-35:100, mixes together；Wherein the composition of urea-formaldehyde resin adhesive, ratio and adhesive-preparing technology application number can be adopted to be 201310353441.5, technical scheme disclosed in the patent application of 201310353442.X, 201310353443.4,201310353433.0,201310353411.4；The alkali lignin that described acidifying is extracted is to prepare by the following method: alkali lignin adds sulphuric acid, and to be adjusted to pH value be about 1.5-2.5, forms insoluble precipitate, filter press, and dry, powdered after finally pulverizing, order number is 90-250 order。
2) MDF layer 2: i.e. medium density fiber flaggy, is positioned at log flaggy surface, is namely arranged in the outside of two rift grain sublayer of original plank layer。According to different needs, medium density fibre board (MDF) can also use low density fiberboard or high density fiberboard instead。
3) finish coat 3: finish coat is affixed on outside MDF。
4) wear-resisting or fireprotection layer 4: according to plank purposes, aluminium oxide wearing layer or fireproofed paper can be added outside again。
Wherein, MDF layer is the layer of most critical in the embodiment of the present invention, and it is the key determining whole sheet material flatness, water proofing property。For this reason, it may be necessary to MDF is done water-proofing treatment。Its water-proofing treatment step is as follows:
(1) preparation fibrolamellar marine glue:
A, alkali lignin adds sulphuric acid, and to be adjusted to pH value be about 1.5-2.5, forms insoluble precipitate, filter press, and dry, powdered after finally pulverizing, order number is 90-250 order, obtains the alkali lignin that acidifying is extracted；
B, the alkali lignin extracted with the acidifying of weight ratio 4-6:100 and urea-formaldehyde resin adhesive, mix and blend, finally prepare fibrolamellar marine glue。Wherein the composition of urea-formaldehyde resin adhesive, ratio and adhesive-preparing technology application number can be adopted to be 201310353441.5, technical scheme disclosed in the patent application of 201310353442.X, 201310353443.4,201310353433.0,201310353411.4。
Wherein alkali lignin can be bought from market。
(2) composite fibre glue: every 4-6 part viscose joins 1 part of fibrolamellar marine glue, makes into rare shape。
Wherein viscose is to be reacted by 3.6-4.4:5.4-6.6 weight ratio by carbamide and formaldehyde, heat up and be incubated one hour at 90 ± 1 DEG C, then add the formic acid of 18-22% concentration, react 1 hour, then add the NaOH of concentration 27-33%, addition reaches pH value 4.9-5.1, reacting one hour to obtain intermedium, be subsequently adding the carbamide of concentration 13.5-16.5%, addition is that every 100 weight portion intermediums add 9-11 parts by weight of urea, reacting 18-22 minute, the stopping of reaction forms liquid glue。Adding concentration 13.5-16.5% carbamide again, addition is that 100 weight portion liquid glues add 8-10 parts by weight of urea, deposits standby。
(3) it is sprayed in filamentary fibers with high-pressure nozzle (selection of pressure size can spray just with liquid glue) with vaporific under room temperature, stirs fiber so that it is uniformly。Wherein every 4 jin of fiber 0.8-1.2 jin glue。
The processing technology of MDF: the fiber after water-proofing treatment fits to log flaggy appearance as follows:
1) fiber is put into framed, pave；Its thickness determines according to the thickness finally suppressed, and such as, lead if to be pressed into 0.5 ± 0.1cm MDF, then the thickness of spread fiber is 4 ± 1cm。
2) precompressed, hot repressing obtains fitting to the fibrolamellar 2 of log flaggy 1。
3) three roads are polished:
A, first, with 180 order sand；Upper polishers polishes；
B, second, with 240 order sand, upper polishers polishes；
C, the 3rd road, with 320 order sand, upper polishers polishes。
The elementary cell of composition MDF (fibre board) layer is the wood fibre or fibre bundle that separate, produces the raw material of fiber essentially from gloomy logging residue, wood machining residues etc.。Produce by traditional method。Dividing Mechanical Method and blasting procedure two class, Mechanical Method divides again thermal machine method, chemical mechanical pulping and purely mechanic method, mainly uses thermal machine method。
The thickness of MDF can be determined according to the purposes of plate, for instance: when doing common wealth furniture sheet material, desirable about the 0.6mm of its thickness。Its thickness can also adopt equally thick with poplar plate of the prior art。
The attaching process of finish coat:
Finish coat attaching process in the embodiment of the present invention like the prior art, presses on MDF layer at high temperature 160 ± 10 DEG C。Wherein finishing paper can outsourcing, himself have been coated with tripolycyanamide leaching pool glue；Decorative pattern is also printed in advance by printing house。
Embodiment 1,
Alkali lignin adds sulphuric acid, and to be adjusted to pH value be 2.0, forms insoluble precipitate, filter press, and dry, powdered after finally pulverizing, order number is 90-250 order, obtains the alkali lignin that acidifying is extracted；The alkali lignin extracted with the acidifying of weight ratio 5:100 again and urea-formaldehyde resin adhesive mix and blend, finally prepare fibrolamellar marine glue。Then every 5 parts of viscoses join 1 part of fibrolamellar marine glue, make into rare shape。Wherein viscose is to be reacted by 4:6 weight ratio by carbamide and formaldehyde, heat up and be incubated one hour at 90 times, then add the formic acid of 20% concentration, react 1 hour, then add the NaOH of concentration 30%, pH value is made to reach 5.0, reacting one hour to obtain intermedium, be subsequently adding the carbamide of concentration 15%, addition is that every 100 weight portion intermediums add 10 parts by weight of urea, reacting 20 minutes, the stopping of reaction forms liquid glue。Adding concentration 15% carbamide again, addition is that 100 weight portion liquid glues add 10 parts by weight of urea, deposits standby。Then it is sprayed in filamentary fibers with high-pressure nozzle with vaporific at normal temperatures again, stirs fiber so that it is uniformly。Wherein every 4 jin of fibers are with 1 jin of glue。Then fiber being put into framed, pave, the thickness of spread fiber is 4cm。Precompressed, hot repressing obtains fitting to the fibrolamellar of log flaggy, thickness 0.6mm；Then upper polishers polishes three roads again: A, first, with 180 order sand；B, second, with 240 order sand；C, the 3rd road, with 320 order sand。Wherein glue used by log flaggy is internal layer marine glue special in this embodiment, and it is the alkali lignin extracted with the acidifying of weight ratio 30:100 and urea-formaldehyde resin adhesive mixes together；The alkali lignin that wherein said acidifying is extracted is to prepare by the following method: alkali lignin adds sulphuric acid, and to be adjusted to pH value be 2.0, forms insoluble precipitate, filter press, and dry, powdered after finally pulverizing, order number is 90-250 order。
The assay of above-mentioned real wood strenthening plywood is as follows:
By assay it can be seen that when flatness is much higher than common solid wood composite board, its resistance to water is close to composite wood plate level, and remote super present fibre board level, content of formaldehyde does not exceed standard simultaneously。
Embodiment two:
PH value in embodiment one is adjusted to 1.5 or about 2.5, still can obtain the result being satisfied in the main after tested。
Embodiment three:
The alkali lignin extract the acidifying in embodiment one and the ratio of urea-formaldehyde resin adhesive are adjusted to 4:100 or 6:100, can obtain the result being satisfied in the main after tested。
Embodiment four:
Fibrolamellar in embodiment one replaces to wood shavings flaggy, and wood shavings flaggy marine glue still adopts the technique the same with fibrolamellar marine glue and formula, can obtain the result being satisfied in the main after tested。
Wherein particieboard (Particleboard) is again particle board, particle board, bagasse board, the particle being made up of timber or other ligno-cellulosic materials, and the wood-based plate composed under heating power and pressure effect after applying adhesive, also known as flakeboard。
Claims (8)
1. the method improving solid wood board surface smoothness, is characterized in that increasing fibre board/wood shavings flaggy (2) on log flaggy (1), and described fibre board/wood shavings flaggy (2) is to make as follows:
S1, the wood fibre separated or fibre bundle being carried out marine glue process, described marine glue is the alkali lignin that extracts of acidifying and the mixture of urea-formaldehyde resin adhesive；
S2, the fiber processed through marine glue is put on log flaggy (1) framed, pave, precompressed, hot repressing obtains fitting to the fibre board/wood shavings flaggy (2) of log flaggy (1)；
S3, it is processed by shot blasting；
On fibre board/wood shavings flaggy, wherein go back pressing finish coat (3)。
2. the method improving solid wood board surface smoothness as claimed in claim 2, is characterized in that: described log flaggy (1) is by being formed multiple sublayer crosswise laminations together；Wherein centrally located sublayer adopts cross waves, and namely between each sublayer, lumber grain intersects or arranged vertically；The connected two-layer being positioned at outside adopts rift grain, and namely two sub-interlayer lumber grain directions, outside are identical。
3. the method improving solid wood board surface smoothness as claimed in claim 1 or 2, is pressed into medium density fibre board (MDF)/particieboard by described fibre board/particieboard。
4. the method improving solid wood board surface smoothness as claimed in claim 1 or 2, is characterized in that also comprising the steps: to fit in the outside of finish coat (3) wear-resisting or fireprotection layer (4)。
5. the method improving solid wood board surface smoothness as claimed in claim 1 or 2, is characterized in that: described marine glue is formulated by following scheme: the alkali lignin extracted with the acidifying of weight ratio 4-6:100 and urea-formaldehyde resin adhesive, mix and blend；The alkali lignin that described acidifying is extracted is to prepare by the following method: alkali lignin adds sulphuric acid, and to be adjusted to pH value be about 1.5-2.5, forms insoluble precipitate, filter press, and dry, final powder is broken into Powdered, and order number is 90-250 order。
6. the method improving solid wood board surface smoothness as claimed in claim 1 or 2, it is characterized in that described marine glue processes to carry out as follows: first with viscose mixing, marine glue is made into sprayable rare shape glue, then it is sprayed in filamentary fibers with shower nozzle with vaporific under room temperature, stirring fiber so that it is uniformly；Wherein every 4 rare shape glue of percent by weight fiber 0.8-1.2 weight portion。
7. the method improving solid wood board surface smoothness as claimed in claim 6, it is characterized in that: described viscose is prepared by following scheme: reacted by 3.6-4.4:5.4-6.6 weight ratio by carbamide and formaldehyde, heat up and be incubated one hour at 90 ± 1 DEG C, then the formic acid of 18-22% concentration is added, react 1 hour, add the NaOH of concentration 27-33% again, pH value is made to reach 4.9-5.1, react one hour to obtain intermedium, it is subsequently adding the carbamide of concentration 13.5-16.5%, addition is that every 100 weight portion intermediums add 9-11 parts by weight of urea, react 18-22 minute, the stopping of reaction forms liquid glue；Adding concentration 13.5-16.5% carbamide again, addition is that 100 weight portion liquid glues add 8-10 parts by weight of urea。
8. the method improving solid wood board surface smoothness as claimed in claim 1, is characterized in that: described polishing has three roads, is respectively as follows: first, with 180 order sand；Upper polishers polishes；Second, with 240 order sand, upper polishers polishes；3rd road, with 320 order sand, upper polishers polishes。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410710738.7A CN105690528A (en) | 2014-11-28 | 2014-11-28 | Method for improving surface evenness of solid board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410710738.7A CN105690528A (en) | 2014-11-28 | 2014-11-28 | Method for improving surface evenness of solid board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105690528A true CN105690528A (en) | 2016-06-22 |
Family
ID=56230943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410710738.7A Pending CN105690528A (en) | 2014-11-28 | 2014-11-28 | Method for improving surface evenness of solid board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105690528A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107650215A (en) * | 2017-09-28 | 2018-02-02 | 中山和欣家具有限公司 | A kind of manufacture method of multi-layer solid wood plastics sucking plate |
| CN110039630A (en) * | 2019-04-29 | 2019-07-23 | 李珂 | The production technology of reinforced melamine decorative medium density fiberboard |
| CN112845001A (en) * | 2020-12-31 | 2021-05-28 | 江苏智配新材料科技有限公司 | Surface flattening method for decorative wire |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0927790A2 (en) * | 1997-12-31 | 1999-07-07 | J.S. STAEDTLER GmbH & Co | Process for making laminated boards, pencilboards and/or stems for writing-, drawing- or painting instruments |
| DE19758266C2 (en) * | 1997-12-31 | 1999-10-28 | Staedtler Fa J S | Process for the production of pencils and / or shafts made of laminates for writing, drawing or painting devices and products manufactured therewith |
| US20060264519A1 (en) * | 2005-05-20 | 2006-11-23 | Henry Company | Wax emulsion for manufacture of composite boards |
| CN101148050A (en) * | 2007-10-23 | 2008-03-26 | 孙和根 | Termpered layer composite solid wooden board and its processing method |
| CN201525061U (en) * | 2009-08-28 | 2010-07-14 | 云南永利发林业有限公司 | Composite plywood with surface layer of fiberboard or shaving board |
| CN102785273A (en) * | 2012-08-31 | 2012-11-21 | 广西南宁绿园北林木业有限公司 | Three-hot-pressing and two-sanding eucalyptus poplar composite artificial board and method for manufacturing same |
-
2014
- 2014-11-28 CN CN201410710738.7A patent/CN105690528A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0927790A2 (en) * | 1997-12-31 | 1999-07-07 | J.S. STAEDTLER GmbH & Co | Process for making laminated boards, pencilboards and/or stems for writing-, drawing- or painting instruments |
| DE19758266C2 (en) * | 1997-12-31 | 1999-10-28 | Staedtler Fa J S | Process for the production of pencils and / or shafts made of laminates for writing, drawing or painting devices and products manufactured therewith |
| US20060264519A1 (en) * | 2005-05-20 | 2006-11-23 | Henry Company | Wax emulsion for manufacture of composite boards |
| CN101148050A (en) * | 2007-10-23 | 2008-03-26 | 孙和根 | Termpered layer composite solid wooden board and its processing method |
| CN201525061U (en) * | 2009-08-28 | 2010-07-14 | 云南永利发林业有限公司 | Composite plywood with surface layer of fiberboard or shaving board |
| CN102785273A (en) * | 2012-08-31 | 2012-11-21 | 广西南宁绿园北林木业有限公司 | Three-hot-pressing and two-sanding eucalyptus poplar composite artificial board and method for manufacturing same |
Non-Patent Citations (1)
| Title |
|---|
| 齐连丽: "碱木质素改性脲醛树脂的研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107650215A (en) * | 2017-09-28 | 2018-02-02 | 中山和欣家具有限公司 | A kind of manufacture method of multi-layer solid wood plastics sucking plate |
| CN110039630A (en) * | 2019-04-29 | 2019-07-23 | 李珂 | The production technology of reinforced melamine decorative medium density fiberboard |
| CN112845001A (en) * | 2020-12-31 | 2021-05-28 | 江苏智配新材料科技有限公司 | Surface flattening method for decorative wire |
| CN112845001B (en) * | 2020-12-31 | 2022-08-09 | 江苏智配新材料科技有限公司 | Surface flattening method for decorative wire |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105442795B (en) | A kind of preparation method of high-density decorative plate | |
| CN101724282B (en) | Fungus chaff composite plate | |
| CN101323128B (en) | Method for producing wood composite floor heating floorboard | |
| CN103243892B (en) | Low-formaldehyde-emission abrasion-resistant and moisture-proof laminate wood flooring and production and laying method for laminate wood flooring | |
| CN103496023B (en) | Method for manufacturing solid wood multilayer composite floor | |
| WO2020258682A1 (en) | Formaldehyde-free medium and high-density board supporting deep overcoating and manufacturing method thereof | |
| CN101549519B (en) | Manufacturing method of high-moisture-proof and high-density fiber board | |
| CN105619544A (en) | Manufacturing method of solid wood composite reinforcing board | |
| CN106364071A (en) | Antibacterial, mould proof, corrosion-resistant and fireproof high pressure decorative sheet and production method thereof | |
| CN102049960A (en) | Resin impregnated cloth veneer and manufacture technology thereof | |
| CN105984010A (en) | Method for manufacturing oriented strandboard | |
| CN105690528A (en) | Method for improving surface evenness of solid board | |
| CN107795091A (en) | A kind of anion solid wooden compound floor | |
| CN105599066A (en) | Insect-preventing ecological decoration board | |
| CN109707136A (en) | A kind of impregnated paper facing multi-layer solid wood composite floor and its manufacturing method | |
| CN104690801A (en) | Bamboo enhanced wood residue-rice hull multi-layer compound plate and preparation method thereof | |
| CN208052188U (en) | A kind of novel bamboo compound floor | |
| CN106013715A (en) | A composite floor board produced by using eucalypt wood laminated veneer lumber and a preparation process therefor | |
| CN110281339A (en) | A kind of preparation method of fire-resistant-chipboard | |
| CN106003279B (en) | The type of respiration high-pressure drying method and solid wooden compound floor production method of rotary cut venner | |
| CN105690534A (en) | Fiberboard manufacturing method | |
| CN105694782A (en) | Waterproof glue for fiberboards | |
| CN110405897A (en) | The production method of high-strength shaving board | |
| CN105694784A (en) | Preparation method of fiber board special waterproof fiber glue | |
| CN105690535A (en) | Waterproofing treatment method for fiber board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160622 |
|
| RJ01 | Rejection of invention patent application after publication |