CN100389940C - Method for spraying and glue blending to glue woody sheet material by using isocyanate resin - Google Patents
Method for spraying and glue blending to glue woody sheet material by using isocyanate resin Download PDFInfo
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- CN100389940C CN100389940C CNB2004101025996A CN200410102599A CN100389940C CN 100389940 C CN100389940 C CN 100389940C CN B2004101025996 A CNB2004101025996 A CN B2004101025996A CN 200410102599 A CN200410102599 A CN 200410102599A CN 100389940 C CN100389940 C CN 100389940C
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Abstract
The present invention relates to a method for spraying and gluing veneer wood boards by using isocyanate resin, which has the manufacture procedures that before bamboo wood and wood are glued, the porosity of the surfaces of the bamboo wood and the wood are reduced; the bamboo wood and the wood are processed mechanically to present the shapes of a bamboo bar and a solid wood bar; the isocyanate resin is sprayed on end heads in the length direction of the bamboo bar and two lateral faces in the width direction of the bamboo bar; the isocyanate resin is sprayed to end heads in the length direction of the solid wood bar and two lateral faces in the width direction of the solid wood bar likewise; a plurality of bamboo splicing boards are sprayed and adhered by the isocyanate resin to be used as an upper and a lower surface layers, a plurality of solid wood splicing boards are sprayed and adhered by the isocyanate resin to be used as a core layer, and the upper surface layer, the lower surface layer and the core layer are veneered by hot pressing technology. Consequently, the glue spread quantity can be reduced to 10g/m 2 to 40g/m 2. Compared with a traditional gluing method, the glue spread quantity of the present invention can be reduced by two to three times. Moreover, the moisture resistant performance of the present invention is good without the release of free formaldehyde.
Description
Technical field
The present invention relates to a kind of method that adopts the isocyanate resin spraying and glue blending to glue woody sheet material.
Background technology
At present, isocyanates (MDI) claims 4 again, 4 '-methyl diphenylene diisocyanate, and its molecular formula is
It is good that this kind resin has a glue performance, and the characteristics that the glue-line resistance to water is strong, the scope of having used in timber industry comprise in the gummed of the splicing of glued board, wafer board, particieboard and timber and film.The gummed that MDI is applied to wooden boards (bamboo wood, timber) still has two problems to be needed to solve, and the one, the price comparison costliness of MDI resin own, and conventional glue spreading method requires the glue-spread of unit are at 60g/m
2More than, it is huge that glue-spread causes the cost of sheet material to increase, gluing instrument cleaning difficulty in the gluing process, and production efficiency reduces; The 2nd, the MDI resin is under the hot-press gluing state, and viscosity sharply reduces, and timber, bamboo wood itself is again a porous material, makes resin be penetrated into rapidly under heating status to go in the wood materials, thereby bonding strength is formed harmful effect.In addition, the wooden boards goods that adopt the MDI gummed have demand widely owing to have good glue performance and good water-fast, anti-moisture performance on the market.Because timber, bamboo wood itself all are the porous type biological materials, all there is the space that differs in size to exist through bamboo bar or the batten surface that processes.In the gummed process,, so often cause two consequences because the existence of these holes tends to cause the undue infiltration of adhesive on the gummed surface, the one, resin added increases, and production cost increases; The 2nd, adhesive too is penetrated in the space, causes gluing together bad.And mainly be at present by viscosity that improves glue or the viscosity that in adhesive, adds various fillers increase glue, prevent the generation of above-mentioned phenomenon.
Summary of the invention
The object of the present invention is to provide a kind of method that adopts the isocyanate resin spraying and glue blending to glue woody sheet material, guaranteeing to reach " laminated structure " standard GB 50206-2002, and under the prerequisite of the requirement of the standard of outdoor use structural plywood, be sprayed to veneer strip (or solid wood bar) surface with a spot of isocyanate resin, in addition, to bamboo wood, wood surface carries out surface treatment (surperficial densification, superfines is carried out the surface sealing, surface sprinkling water smoke), by reducing and reduce the method for the hole of bamboo wood wood surface, to prevent that isocyanate resin is at bamboo wood, the undue infiltration of wood surface, the sheet material of this kind method gummed does not in use have free formaldehyde to discharge, and can not pollute room air.
The invention reside in provides a kind of method that adopts the isocyanate resin spraying and glue blending to glue woody sheet material, the making step of its feature to be,
One, needs bamboo wood and wood surface are reduced the processing of porosity before the gummed;
Two, bamboo wood, timber machining are processed into the shape of bamboo bar, solid wood bar;
Three, isocyanate resin is sprayed to the termination of the length direction of bamboo bar, and docks in the longitudinal direction, then isocyanate resin is sprayed to the two sides of the width of bamboo bar, be spliced to form a bamboo jigsaw at width at this bamboo bar; Equally isocyanate resin is sprayed to the termination of the length direction of solid wood bar, and dock in the longitudinal direction, then isocyanate resin is sprayed to the two sides of the width of solid wood bar, be spliced to form the solid wood jigsaw at this solid wood bar at width, its resin added scope is 10 grams/square metre to 40 gram/square metre applying glue aspects; Adopt pressure limit 5～30 kg/cm of heat pressing process between above-mentioned upper and lower superficial layer and the sandwich layer; Hot pressing temperature is at 8 0～2 00 degree, and hot pressing time was at 1～3 minute/mm.
Four, again that polylith bamboo jigsaw is bonding as upper and lower superficial layer with the isocyanate glue spraying, bonding as sandwich layer polylith solid wood jigsaw with the isocyanate glue spraying, the isocyanate resin of on the facing surfaces of bamboo jigsaw, solid wood jigsaw, all spraying again, between upper and lower superficial layer and sandwich layer, adopt heat pressing process to carry out the sheet material gummed, finally form product.
The invention reside in a kind of method that adopts the isocyanate resin spraying and glue blending to glue woody sheet material, the processing method of above-mentioned reduction porosity are provided is bamboo wood, wood surface to be carried out the surface adopt the densification of the mode of hot pressing or roll-in to handle.
The invention reside in a kind of method that adopts the isocyanate resin spraying and glue blending to glue woody sheet material, the processing method of above-mentioned reduction porosity are provided is that bamboo wood, wood surface are adopted superfines is the enclosure method of sealer.
The invention reside in a kind of method that adopts the isocyanate resin spraying and glue blending to glue woody sheet material, the processing method of above-mentioned reduction porosity are provided is that bamboo wood, wood surface are adopted surperficial humidification or spray the catalyst method.
A kind of method that adopts the isocyanate resin spraying and glue blending to glue woody sheet material that provides is provided, and the air-stream spraying applying glue is adopted in above-mentioned isocyanate glue spraying.
A kind of method that adopts the isocyanate resin spraying and glue blending to glue woody sheet material that provides is provided, and above-mentioned bamboo bar thickness range is at 2mm～6mm; Width range is at 10mm～30mm;
A kind of method that adopts the isocyanate resin spraying and glue blending to glue woody sheet material that provides is provided, and above-mentioned solid wood bar thickness is 2mm～30mm; Width range is at 10mm～40mm;
Resin added of the present invention can be reduced to 10-40g/m
2, reduce 1-2 doubly than traditional glue spreading method resin added, reduced cost of goods manufactured; And moisture resistance is good, and no free formaldehyde discharges.
Description of drawings
The product profile of Fig. 1 exemplary embodiments of the present invention.
The finger stereogram of the termination of the length direction of Fig. 2 veneer strip of the present invention.
The termination stereogram of the termination of the length direction of Fig. 3 veneer strip of the present invention.
The specific embodiment
The making step of wooden boards of the present invention (bamboo wood and timber) is as follows:
1, needs bamboo wood and wood surface are reduced the processing of porosity before the gummed, the method of its processing mainly contain following some: the one, bamboo wood, wood surface are carried out surperficial densification handle, promptly adopt the mode of hot pressing or roll-in to reduce or eliminate the hole of wood surface, (temperature of its hot pressing or roll-in is at 50-180 ℃, pressure is at 0.5-2.0MPa, time is in 15-120 second), the main purpose of this kind processing is to prevent the undue infiltration of isocyanate resin at bamboo wood, wood surface, thereby causes bad gummed; The 2nd, adopt the method that bamboo wood, wood surface are sealed, it is the sealing material that sealer adopts superfines or other kind, it is evenly brushed or is sprayed at by the veneer surface by adopting superfines (200 orders～20 orders), to play sealing by the purpose of veneer surface pore, (the sprinkling amount of superfines is at 15-60g/cm
2.), reduce the hole between bamboo wood, lumber fibre tissue, to prevent the excessive penetration of resin at bamboo wood, wood surface; The 3rd, adopt surperficial humidification or spray the processing of catalyst method, by adopting mode, reach sealing by the purpose of veneer surface pore to veneer surface sprinkling water smoke, the sprinkling quantity of water smoke is at 15-45g/cm
2To promote bamboo wood, wood surface gummed.
2, bamboo wood, timber machining are become the shape of veneer, veneer strip (bamboo bar or solid wood bar); This bamboo bar thickness range is at 2mm～6mm; Width range is at 10mm～30mm; This solid wood bar thickness is 2mm～30mm; Width range is at 10mm～40mm;
3, (being applying glue) the termination (finger or termination end points) of isocyanate resin being sprayed to the length direction of bamboo bar, and dock in the longitudinal direction, then isocyanate resin is sprayed to the two sides of the width of bamboo bar, is spliced to form the bamboo jigsaw at width at this bamboo bar; (being applying glue) the termination (finger or termination end points) of equally isocyanate resin being sprayed to the length direction of solid wood bar, and dock in the longitudinal direction, then isocyanate resin is sprayed to the two sides of the width of solid wood bar, is spliced to form the solid wood jigsaw at width at this solid wood bar;
The method of air-stream spraying applying glue is adopted in the spraying of above-mentioned isocyanate resin spraying isocyanate glue, by the fogging degree of controlling spray time, the pressure of the air-flow of spraying is controlled spray glue amount and glue drips, the method of this kind spraying applying glue need adopt between special spraying applying glue carries out, and be furnished with forced ventilation equipment, cause respiratory system damage to avoid glue mist diffusion couple applying glue personnel.
Be characterized in that applying glue is even, resin added is little, and its resin added scope is 10 grams/square metre to 40 gram/square metre applying glue aspects.This kind method is not only than traditional glue spreading method (50-100g/m
2) reduce by 1～2 times of resin added, and the glue-spread of having avoided employing glue spreader gluing to cause is big, and the automatic double surface gluer flushing dose is big, ineffective shortcoming.
4, again that polylith bamboo jigsaw is bonding as upper and lower superficial layer with the isocyanate glue spraying, bonding as sandwich layer polylith solid wood jigsaw with the isocyanate glue spraying, the isocyanate resin of on the facing surfaces of bamboo jigsaw, solid wood jigsaw, all spraying again, between upper and lower superficial layer and sandwich layer, adopt heat pressing process to carry out sheet material gummed, its hot pressing pressure scope 5～30 kg/cm; Hot pressing temperature is at 80～200 degree, and hot pressing time was at 1～3 minute/mm; The final product that forms is bamboo wood composite veneer or bamboo wood integrated timber.
Also can be simple bamboo jigsaw interlayer gummed or be simple solid wood jigsaw interlayer gummed by above-mentioned same implementation method, finally forming product be bamboo plywood, integrated timber or wood gluing plate, timber integrated timber.
And adopt bamboo wood, timber or the bamboo wood composite article of above-mentioned process gummed also to have good glue performance, moisture resistance is good, and no free formaldehyde discharges.
Claims (7)
1. method that adopts the isocyanate resin spraying and glue blending to glue woody sheet material, the making step of its feature be,
One, needs bamboo wood and wood surface are reduced the processing of porosity before the gummed;
Two, bamboo wood, timber machining are become the shape of bamboo bar, solid wood bar;
Three, isocyanate resin is sprayed to the termination of the length direction of bamboo bar, and docks in the longitudinal direction, then isocyanate resin is sprayed to the two sides of the width of bamboo bar, be spliced to form a bamboo jigsaw at width at this bamboo bar; Equally isocyanate resin is sprayed to the termination of the length direction of solid wood bar, and dock in the longitudinal direction, then isocyanate resin is sprayed to the two sides of the width of solid wood bar, be spliced to form the solid wood jigsaw at this solid wood bar at width, its resin added scope is 10 grams/square metre to 40 gram/square metre applying glue aspects; Adopt pressure limit 5～30 kg/cm of heat pressing process between above-mentioned upper and lower superficial layer and the sandwich layer; Hot pressing temperature is at 80～200 degree, and hot pressing time was at 1～3 minute/mm.
Four, again that polylith bamboo jigsaw is bonding as upper and lower superficial layer with the isocyanate glue spraying, bonding as sandwich layer polylith solid wood jigsaw with the isocyanate glue spraying, the isocyanate resin of on the facing surfaces of bamboo jigsaw, solid wood jigsaw, all spraying again, between upper and lower superficial layer and sandwich layer, adopt heat pressing process to carry out the sheet material gummed, finally form product.
2. a kind of method that adopts the isocyanate resin spraying and glue blending to glue woody sheet material according to claim 1, it is characterized in that the processing method of above-mentioned reduction porosity is bamboo wood, wood surface to be carried out the surface adopt the densification of the mode of hot pressing or roll-in to handle.
3. a kind of method that adopts the isocyanate resin spraying and glue blending to glue woody sheet material according to claim 1 is characterized in that, the processing method of above-mentioned reduction porosity is that bamboo wood, wood surface are adopted superfines is the enclosure method of sealer.
4. a kind of method that adopts the isocyanate resin spraying and glue blending to glue woody sheet material according to claim 1 is characterized in that, the processing method of above-mentioned reduction porosity is that bamboo wood, wood surface are adopted surperficial humidification or spray the catalyst method.
5. a kind of method that adopts the isocyanate resin spraying and glue blending to glue woody sheet material according to claim 1 is characterized in that, the air-stream spraying applying glue is adopted in above-mentioned isocyanate glue spraying.
6. a kind of method that adopts the isocyanate resin spraying and glue blending to glue woody sheet material according to claim 1 is characterized in that, above-mentioned bamboo bar thickness range is at 2mm～6mm; Width range is at 10mm～30mm.
7. a kind of method that adopts the isocyanate resin spraying and glue blending to glue woody sheet material according to claim 1 is characterized in that, above-mentioned solid wood bar thickness is 2mm～30mm; Width range is at 10mm～40mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101025996A CN100389940C (en) | 2004-12-28 | 2004-12-28 | Method for spraying and glue blending to glue woody sheet material by using isocyanate resin |
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| CNB2004101025996A CN100389940C (en) | 2004-12-28 | 2004-12-28 | Method for spraying and glue blending to glue woody sheet material by using isocyanate resin |
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| CN1796066A CN1796066A (en) | 2006-07-05 |
| CN100389940C true CN100389940C (en) | 2008-05-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102581917B (en) * | 2012-03-08 | 2013-11-06 | 浙江农林大学 | Manufacturing method of scrimber comprising wood wool rod units |
| CN103507139B (en) * | 2013-10-11 | 2015-07-29 | 中国林业科学研究院木材工业研究所 | A kind of manufacture method of formaldehyde-free solid-wood composite board |
| CN106313224B (en) * | 2016-08-31 | 2017-11-14 | 肇庆力合技术发展有限公司 | A kind of surface-closed agent and its application method |
| CN115318527A (en) * | 2022-08-17 | 2022-11-11 | 中集新型环保材料股份有限公司 | Bamboo gluing system and bamboo gluing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001331408A (en) * | 2000-03-22 | 2001-11-30 | Internatl Business Mach Corp <Ibm> | Method and system for specifying required device attribute to be buried in worldwide web document request |
| JP2002007819A (en) * | 2000-06-19 | 2002-01-11 | Akihiro Kawauchi | Method and system for swapping product swapping right |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001331408A (en) * | 2000-03-22 | 2001-11-30 | Internatl Business Mach Corp <Ibm> | Method and system for specifying required device attribute to be buried in worldwide web document request |
| JP2002007819A (en) * | 2000-06-19 | 2002-01-11 | Akihiro Kawauchi | Method and system for swapping product swapping right |
Non-Patent Citations (4)
| Title |
|---|
| 落叶松木材API胶粘剂径面胶接强度的差异. 程瑞香，顾继友.林业科学，第40卷第4期. 2004 |
| 落叶松木材API胶粘剂径面胶接强度的差异. 程瑞香，顾继友.林业科学，第40卷第4期. 2004 * |
| 集成材胶合工艺的研究. 彭立民，王金林.木材工业，第18卷第3期. 2004 |
| 集成材胶合工艺的研究. 彭立民，王金林.木材工业，第18卷第3期. 2004 * |
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