CN102756418A - Method for improving stability of recombinant bamboo wood - Google Patents

Method for improving stability of recombinant bamboo wood Download PDF

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Publication number
CN102756418A
CN102756418A CN2011101131783A CN201110113178A CN102756418A CN 102756418 A CN102756418 A CN 102756418A CN 2011101131783 A CN2011101131783 A CN 2011101131783A CN 201110113178 A CN201110113178 A CN 201110113178A CN 102756418 A CN102756418 A CN 102756418A
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bamboo
silk
glue
bamboo silk
raw material
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CN2011101131783A
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CN102756418B (en
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钱俊
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Tongxiang Beite Technology Co ltd
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Zhejiang A&F University ZAFU
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Abstract

The invention relates to a method for improving stability of recombinant bamboo wood. The invention takes the following nine measures: 1, selecting the bamboo wood according to the principle of similar mechanical properties; 2, dividing the bamboo wood into bamboo filaments by using the same equipment and method; 3, making the diameter class of the bamboo filaments of the same batch similar and small; 4, dehydrating the bamboo filaments at high temperature, cooling and applying glue; 5, selecting glue and soaking in glue in the rolling process; 6, controlling temperature and water in the redrying process of the bamboo filaments; 7, distributing and paving the bamboo filaments according to appropriate intersection with proper amount and water content gradient; 8, performing temperature fluctuation type thermocuring after hot-in cold-out flat pressing and moulding pressing formation; and 9, performing restriction type storage. According to the nine measures, the mechanical properties of the final raw materials namely bamboo filaments are consistent basically; consistency of the mechanical properties of the bamboo filaments is guaranteed by the same equipment and filament dividing method; and dehydration is performed as much as possible, glue liquid is permeated widely and uniformly, and balanced dehydration of the product subjected to hot pressing is realized, so that the stability of the recombinant bamboo is improved and the quality and the application effect of the recombinant bamboo are embodied well.

Description

Improve the method for recombining bamboo stability
Technical field
The present invention relates to a kind of production method of bamboo plywood, especially a whole set of improves improving one's methods of recombining bamboo stability.
Background technology
In recent years; Because of the forest taboo is cut down, wood raw material is in great shortage, wood substituted by bamboo day is emerging, wherein bamboo wood saw section is split to be divided into bamboo sheet or to claim the bamboo chip silk; Be like non-of sheet, like the material unit of Si Feisi; The boundling impregnation dries the back and is molded into the cylindricality square stock with about 50Mpa, carries out heat cure again and processes the method for recombining bamboo and promote the most soon, has the greatest impact.The method of producing recombined bamboo plate with multidaylight press tiling hot pressing formation process also has certain scale relative among a small circle.Find that through production practices the recombining bamboo stability of these production method outputs is still undesirable, sheet material is prone to buckling deformation, and face checking or burr occurs influence the scope of application and service property (quality), and the utmost point has improvement technology to improve stable necessity.The three-decker solid wood composite board that CN100408288 has announced unlike material improves stable heat pressing process, only to the material and the moisture content of each laminate, limits respectively, to two kinds of different modes of sequence pile proposition of hot pressing and secondary hot pressing.CN100522521 has announced a kind of impregnating agent of being made up of the number of chemical raw material and has soaked wooden body, improves its durability, the method for dimensional stability and case hardness.All the time do not retrieve the relevant data that improves the method for recombining bamboo stability.
Summary of the invention
The technical problem that the present invention will solve is to design a kind of method that improves recombining bamboo stability.
The technical scheme that solves this technical problem employing is: the method for this raising recombining bamboo stability is carried out as follows:
(1) select bamboo wood for use according to the close principle of mechanical property: as far as possible close, growing environment is close, the bamboo section of taking is identical, take the close principle in Zhu Bi position selects materials by bamboo age, as the processing raw material of recombining bamboo of producing same batch;
(2) adopt identical equipment and method that bamboo wood is carried out the branch silk: produce the raw material bamboo silk of same batch of recombining bamboo, the roller of employing same model rolls or the breaker beater comb is separated or machine for twist is twisted the bamboo silk that is twisted into;
(3) the raw material bamboo silk footpath level of same batch of recombining bamboo of production is little and close: radially specification was as far as possible little for its strand after bamboo wood divided silk, was 1.5-3mm, same batch of bamboo silk that adopts close footpath level;
(4) the bamboo silk is carried out high temperature dehydration and cooling applying glue: send into the bamboo silk or after rickle is tied up or steel mesh fetters up and down and dewater in 170-225 ℃ to moisture content≤3.8%, discharging is cooled to≤53 ℃ of applying glues;
(5) adopt the strong water-fast glue of penetration; Impregnation in repeatedly roll-in process: the bamboo silk adopts phenol glue, melamine glue or two kinds of glue modified adhesive impregnation separately; Simultaneously the bamboo silk is carried out at least three roll-ins at impregnation, last also with the surplus glue on the roll-in method eliminating bamboo silk;
(6) to the bamboo silk again drying carry out temperature control and control water: after the applying glue the dry again temperature of bamboo silk with phenolic aldehyde and modified adhesive thereof<53 ℃; With melamine and modified adhesive thereof<44 ℃; The moisture content that the bamboo silk that is used for compression molding is made the core raw material is 5%-8%, makes the moisture content 12%-16% of periphery raw material, and the moisture content of making the transition part raw material between two ones is 8%-12%; The moisture content 7%-10% that makes the sandwich layer raw material of concora crush moulding makes the moisture content 10%-14% of surface layer raw material up and down;
(7) the bamboo silk distributes by an amount of and appropriate angle of cut and moisture gradient and mats formation: what the bamboo silk in mould or on the pressing plate of mating formation had is arranged in parallel; Crossing being less than 30 ° of angles of cut that has arranges; The bamboo silk that wherein intersects accounts for bamboo silk total amount greater than 30%, and when mating formation blank by outer and in by the said moisture content of measure (6) Gradient distribution from high to low;
(8) heat is advanced cold concora crush that goes out and the temperature wave dynamic formula heat cure after the compression molding: with temperature control is to 120-160 ℃ at the beginning of the compacting of multi-layer flat press, the THICKNESS CALCULATION that hot pressing time is pressed into plate is 45-65s/mm, is cooled to≤85 ℃ of dischargings again; The fluctuation formula temperature control mode of the employing high temperature-middle temperature-inferior high temperature of compression molding heat cure typing-inferior middle temperature accounts for total ratio consuming time in 140 ℃-110 ℃-130 ℃-80 ℃ with each warm area respectively and is respectively 30%, 20%, 25%, 25% control;
(9) constraint formula is deposited: with the recombining bamboo of processing 22-26 ℃ with relative humidity 40%-50% environment in the mode of tying up or mutually the mode of laminating deposit; Wherein sheet material is deposited and is no less than 60h, and the square column material is deposited and is no less than 150h.
Two-way extrusion forming is adopted in compression molding in the said step (8).
Said step leaves in the balance cylinder by the temperature and humidity requirement with the constraint formula in (9).
The invention has the beneficial effects as follows that the employing recombining bamboo stability of producing of originally improving one's methods is improved, the sheet material that saw is divided into is difficult for warpage, reduce face checking and the probability of burr occurs, and the scope of application is wide, and the Related product quality increases.
The specific embodiment
The present invention does a step below in conjunction with embodiment and details; Three phase approximately principles of wherein corrective measure (1)-(3) all be to same batch of reorganization bamboo produce raw material proposed uncommon can do one's best requirement; All select for use bamboo be age 5,6 years, growing environment be in identical or close height above sea level, soil property roughly the same, the plot vicinity bamboo on sun (or cloudy) slope that coexists, the season of felling is identical; The bamboo section of taking is identical to be meant same batch of end section or stage casing or tip section of all taking bamboo wood, interts or uses with.Taking close be meant when taking same bamboo section also in Zhu Bi position should be with the identical or close position that get this bamboo Duan Zhubi, or all be near the surf green position all be near the tabasheer position or be and get position placed in the middle.Everything is for selecting the close bamboo wood of mechanical property for use, making the raw material of same batch products.With identical device and method bamboo wood being carried out the branch silk, also is to guarantee that the mechanical property of bamboo silk of output is close.The fineness degree of the bamboo silk of output is that directly level is close is for the mechanical property of this final raw material of bamboo silk is close, and the footpath level is more little, and stress is also just more little, but because of receiving the restriction of machining property, directly level is decided to be 1.5-3mm, is calculating the very bamboo silk of small diameter grade at present.High temperature dehydration and the favourable infiltration capacity of glue in the bamboo silk that as far as possible increase of cooling applying glue are selected the strong water-fast glue of penetration again, are aided with the mode of at least three roll-ins in impregnation; Make glue in the bamboo silk, receive roll-in and spread while permeating; Then suck once more further diffusion again, so repeated multiple times evenly and is widely infiltrated glue in bamboo silk cell; Gummed power is strong and even, strengthens anti-stress.The bamboo silk is dry again after the applying glue, and the bamboo silk that is paved on zones of different is proposed different water content requirement, and this is that the complexity of accepting size, the heated time length of heat during from hot pressing and distributing moisture content is considered; Be prone to distribute and top layer that emissions is big answers moisture content high; Accepting the not vaporific less sandwich layer moisture content of heat should hang down, the middle level fall between such Gradient distribution; After hot pressing, the inside and outside water content of whole recombining bamboo product is relatively evenly to reduce internal stress.Require to have a certain proportion of bamboo silk to intersect when mating formation, and the angle of cut >=30 °, take into account product shear strength and elastic modelling quantity requirement and for it.It is for as often as possible distributing moisture and to the greatest extent glues that infiltrate in the short time that heat is advanced the cold concora crush that goes out more; Heat cure is carried out in the temperature control of fluctuation formula; The square column material that helps recombinating evenly solidifies with whole, and the constraint formula is deposited, and is a kind of ancillary method of the product internal stress further being tried to achieve balance.After adopting above-mentioned nine corrective measures; It is consistent to be from final raw material that the mechanical property of bamboo silk is made every effort to; Divide silk method further to guarantee the unanimity of bamboo silk mechanical property, slough moisture and make glue extensively and equably infiltrate in the bamboo silk cell, after the hot pressing dehydration of each layer realization balance and guarantee that the whole numerous aspects such as uniform solidification of product set about improving as much as possible, realize the raising that recombining bamboo is stable.

Claims (3)

1. one kind is improved the stable method of recombining bamboo, it is characterized in that carrying out as follows:
(1) select bamboo wood for use according to the close principle of mechanical property: as far as possible close, growing environment is close, the bamboo section of taking is identical, take the close principle in Zhu Bi position selects materials by bamboo age, as the processing raw material of recombining bamboo of producing same batch;
(2) adopt identical equipment and method that bamboo wood is carried out the branch silk: produce the raw material bamboo silk of same batch of recombining bamboo, the roller of employing same model rolls or the breaker beater comb is separated or machine for twist is twisted the bamboo silk that is twisted into;
(3) the raw material bamboo silk footpath level of same batch of recombining bamboo of production is little and close: radially specification was as far as possible little for its strand after bamboo wood divided silk, was 1.5-3mm, same batch of bamboo silk that adopts close footpath level;
(4) the bamboo silk is carried out high temperature dehydration and cooling applying glue: send into the bamboo silk or after rickle is tied up or steel mesh fetters up and down and dewater in 170-225 ℃ to moisture content≤3.8%, wire vent is cooled to≤53 ℃ of applying glues;
(5) adopt the strong water-fast glue of penetration; Impregnation in repeatedly roll-in process: the bamboo silk adopts phenol glue, melamine glue or two kinds of glue modified adhesive impregnation separately; Simultaneously the bamboo silk is carried out at least three roll-ins at impregnation, last also with the surplus glue on the roll-in method eliminating bamboo silk;
(6) to the bamboo silk again drying carry out temperature control and control water: after the applying glue the dry again temperature of bamboo silk with phenolic aldehyde and modified adhesive thereof<53 ℃; With melamine and modified adhesive thereof<44 ℃; The moisture content that the bamboo silk that is used for compression molding is made the core raw material is 5%-8%, makes the moisture content 12%-16% of periphery raw material, and the moisture content of making the transition part raw material between two ones is 8%-12%; The moisture content 7%-10% that makes the sandwich layer raw material of concora crush moulding makes the moisture content 10%-14% of surface layer raw material up and down;
(7) the bamboo silk distributes by an amount of and appropriate angle of cut and moisture gradient and mats formation: what the bamboo silk in mould or on the pressing plate of mating formation had is arranged in parallel; Crossing being less than 30 ° of angles of cut that has arranges; The bamboo silk that wherein intersects accounts for bamboo silk total amount greater than 30%, and when mating formation blank by outer and in by the said moisture content of measure (6) Gradient distribution from high to low;
(8) heat is advanced cold concora crush that goes out and the temperature wave dynamic formula heat cure after the compression molding: with temperature control is to 120-160 ℃ at the beginning of the compacting of multi-layer flat press, the THICKNESS CALCULATION that hot pressing time is pressed into plate is 45-65s/mm, is cooled to≤85 ℃ of dischargings again; The fluctuation formula temperature control mode of the employing high temperature-middle temperature-inferior high temperature of compression molding heat cure typing-inferior middle temperature accounts for total ratio consuming time in 140 ℃-110 ℃-130 ℃-80 ℃ with each warm area respectively and is respectively 30%, 20%, 25%, 25% control;
(9) constraint formula is deposited: with the recombining bamboo of processing 22-26 ℃ with relative humidity 40%-50% environment in the mode of tying up or mutually the mode of laminating deposit; Wherein sheet material is deposited and is no less than 60h, and the square column material is deposited and is no less than 150h.
2. the method for raising recombining bamboo stability as claimed in claim 1 is characterized in that two-way extrusion forming is adopted in compression molding in the said step (8).
3. the method for raising recombining bamboo stability as claimed in claim 1 is characterized in that leaving in the balance cylinder by the temperature and humidity requirement with the constraint formula in the said step (9).
CN201110113178.3A 2011-04-27 2011-04-27 Method for improving stability of recombinant bamboo wood Active CN102756418B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104441097A (en) * 2014-11-18 2015-03-25 福建农林大学 Process for producing functional bamboo-based panels through freezing and thawing cycle method
CN106003344A (en) * 2016-05-16 2016-10-12 福建金竹竹业有限公司 Method for preparing reconstituted bamboo floor through efficient glue dipping technique
CN106584629A (en) * 2016-12-12 2017-04-26 安吉奇辰竹业有限公司 Manufacture process for recombined bamboo
CN109623986A (en) * 2018-12-31 2019-04-16 江西南丰振宇实业集团有限公司 A kind of processing technology preparing bamboo fibre floor for partially dry moso bamboo
CN112621948A (en) * 2021-01-19 2021-04-09 永安千禾生物能源有限公司 Bamboo splint dipping and rolling device and production process thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001232610A (en) * 2000-02-24 2001-08-28 Dantani Plywood Co Ltd Laminated wood of woody cleaved pieces and manufacturing method therefor
US6586503B1 (en) * 2000-10-18 2003-07-01 Correct Building Products, L.L.C. Composite products comprising cellulosic materials and synthetic resins and methods of making the same
CN101045311A (en) * 2006-03-27 2007-10-03 戴武兵 Composite product made of bamboo fiber and wood fiber, and its production method
CN101214677A (en) * 2008-01-15 2008-07-09 邱天祥 Method of preparing full bamboo or bamboo wood composite oriented structure shaving board
CN101376253A (en) * 2008-04-09 2009-03-04 国家林业局北京林业机械研究所 Method and equipment for measuring shavings raw material for industrial production of shaving

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001232610A (en) * 2000-02-24 2001-08-28 Dantani Plywood Co Ltd Laminated wood of woody cleaved pieces and manufacturing method therefor
US6586503B1 (en) * 2000-10-18 2003-07-01 Correct Building Products, L.L.C. Composite products comprising cellulosic materials and synthetic resins and methods of making the same
CN101045311A (en) * 2006-03-27 2007-10-03 戴武兵 Composite product made of bamboo fiber and wood fiber, and its production method
CN101214677A (en) * 2008-01-15 2008-07-09 邱天祥 Method of preparing full bamboo or bamboo wood composite oriented structure shaving board
CN101376253A (en) * 2008-04-09 2009-03-04 国家林业局北京林业机械研究所 Method and equipment for measuring shavings raw material for industrial production of shaving

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104441097A (en) * 2014-11-18 2015-03-25 福建农林大学 Process for producing functional bamboo-based panels through freezing and thawing cycle method
CN106003344A (en) * 2016-05-16 2016-10-12 福建金竹竹业有限公司 Method for preparing reconstituted bamboo floor through efficient glue dipping technique
CN106584629A (en) * 2016-12-12 2017-04-26 安吉奇辰竹业有限公司 Manufacture process for recombined bamboo
CN106584629B (en) * 2016-12-12 2019-01-11 安吉奇辰竹业有限公司 A kind of manufacturing process of Recombined bamboo
CN109623986A (en) * 2018-12-31 2019-04-16 江西南丰振宇实业集团有限公司 A kind of processing technology preparing bamboo fibre floor for partially dry moso bamboo
CN112621948A (en) * 2021-01-19 2021-04-09 永安千禾生物能源有限公司 Bamboo splint dipping and rolling device and production process thereof

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Effective date of registration: 20210824

Address after: Room 1011, 4 / F, building 5, No. 299, Hangfu Road, Chongfu Town, Tongxiang City, Jiaxing City, Zhejiang Province

Patentee after: Tongxiang Beite Technology Co.,Ltd.

Address before: 311300 Zhejiang province Ling'an City Kam Street No. 252

Patentee before: ZHEJIANG A & F University