CN104924373A - Preparation method of environmentally-friendly high-performance eucalyptus plywood - Google Patents
Preparation method of environmentally-friendly high-performance eucalyptus plywood Download PDFInfo
- Publication number
- CN104924373A CN104924373A CN201510322130.1A CN201510322130A CN104924373A CN 104924373 A CN104924373 A CN 104924373A CN 201510322130 A CN201510322130 A CN 201510322130A CN 104924373 A CN104924373 A CN 104924373A
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- CN
- China
- Prior art keywords
- eucalyptus
- veneer
- hot pressing
- glued board
- plate
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
- B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/13—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board all layers being exclusively wood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Forests & Forestry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses a preparation method of an environmentally-friendly high-performance eucalyptus plywood. The method comprises the steps of (1) pre-processing eucalyptus; (2) treating the pre-processed eucalyptus as a single plate, and preparing a surface plate and a core plate through a combined surface plate structure, wherein the single plate is 1.2 to 2.5mm in thickness; drying the single plate through a roller drying machine, wherein the water content of the core plate is less than 6%, and the water content of the surface plate is 8 to 10%; (3) adhering the core plate and the surface plate through adhesive prepared from tea polyphenol containing tea water, polyethylene glycol, thiourea and an urea solution by the plywood assembling, glue coating and thermal pressing processes, so as to obtain the plywood as requirement. According to the technical scheme, the method has the advantages that the defects of high material cost, small service life and poor safety and environmental protection in the prior art can be overcome, the material cost is small, the service life is long, and the safety and environmental protection are good.
Description
Technical field
The present invention relates to plank processing technique field, particularly, relate to a kind of preparation method of environment-friendly type high performance Eucalyptus glued board.
Background technology
Glued board also claims clamping plate, is commonly called as thin central layer.Formed by the veneer of three layers or multilayer one millimeters thick or the hot pressing of thin plate sticker.The advantages such as glued board has that little, the breadth of distortion is large, easy construction, non-warpage, band tensile mechanical performance are good, therefore be widely used in the use of the industrial departments such as Furniture manufacture, interior decoration, residential housing and shipbuilding, railway carriage manufacture, various military project, light industrial goods and packaging.
In recent years, with the fast development of the upstream and downstream industries such as real estate, furniture, architectural engineering, logistics packaging, the demand of market to glued board plate grows to even greater heights, wood processing industry also obtain fast development, the market demand of glued board constantly increases always, and its production technology, product quality also have a distinct increment.
The production of glued board, hot pressing is key procedure, and most producer producing glued board, all uses formaldehyde or carbamide resin, can discharge free formaldehyde gas, there is serious formaldehyde pollution in hot pressing process at present.And due to the problem of production technology level, the glued board of production technical indicator not high enough in wear-resisting, corrosion-resistant, MOR, bonding strength, shock resistance degree etc., can not better meet market demand.
Realizing in process of the present invention, inventor finds at least to exist in prior art the defect such as material cost is high, service life is short and Safety and Environmental Protection is poor.
Summary of the invention
The object of the invention is to, for the problems referred to above, propose a kind of preparation method of environment-friendly type high performance Eucalyptus glued board, to realize that the cost of material is low, long service life and the good advantage of Safety and Environmental Protection.
For achieving the above object, the technical solution used in the present invention is: a kind of preparation method of environment-friendly type high performance Eucalyptus glued board, comprising:
(1) pretreatment is carried out to Eucalyptus;
(2) Eucalyptus pretreatment obtained, as veneer, adopts composite table plate structure, prepares dash board and central layer; The thickness of veneer is 1.2 ~ 2.5mm, and veneer drying adopts roller dryer, and central layer moisture content is below 6%, and dash board moisture content is at 8 ~ l0%;
(3) use by the obtained adhesive of the Aqua Folium Camelliae sinensis containing Tea Polyphenols, polyethylene glycol, thiocarbamide and urea liquid, by glued board assembly, gluing and heat pressing process, by central layer and dash board bonding, obtained required glued board; The concrete operations of this glued board assembly, gluing and heat pressing process, comprising:
1) hot pressing temperature is after 130-140 DEG C, and glue-spread is 200-250g/m
2;
2), after blanket glued veneer, standing 30-60min carries out ageing;
3) precompressed and hot pressing is carried out after ageing: preload pressure controls at 1.0 ~ l.2 MPa, and squeeze time is 20min; Hot pressing temperature l25 ~ 140 DEG C, hot pressing pressure controls at l.2 ~ 1.8MPa, and hot pressing time is 1min/mm.
The preparation method of the environment-friendly type high performance Eucalyptus glued board of various embodiments of the present invention, owing to comprising: (1) carry out pretreatment to Eucalyptus; (2) Eucalyptus pretreatment obtained, as veneer, adopts composite table plate structure, prepares dash board and central layer; The thickness of veneer is 1.2 ~ 2.5mm, and veneer drying adopts roller dryer, and central layer moisture content is below 6%, and dash board moisture content is at 8 ~ l0%; (3) use by the obtained adhesive of the Aqua Folium Camelliae sinensis containing Tea Polyphenols, polyethylene glycol, thiocarbamide and urea liquid, by glued board assembly, gluing and heat pressing process, by central layer and dash board bonding, obtained required glued board; Thus the defect that in prior art, material cost is high, service life is short and Safety and Environmental Protection is poor can be overcome, to realize that the cost of material is low, long service life and the good advantage of Safety and Environmental Protection.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from description, or understand by implementing the present invention.
Below by embodiment, technical scheme of the present invention is described in further detail.
Detailed description of the invention
Below the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Technical scheme of the present invention, Eucalyptus is utilized to develop low formaldehyde environment protection type high-strength Eucalyptus glued board, by carrying out modification to Eucalyptus, formaldehyde pollution is controlled to the improvement of glue formula, uses the intensity of special this guarantee of structural design production technology glued board, the physical index such as wear-resisting, and the main production equipments such as plate paver are improved, while reaching the low formaldehyde high strength of glued board environmental protection, to enhance productivity, save consumption of wood.
According to the embodiment of the present invention, provide a kind of preparation method of environment-friendly type high performance Eucalyptus glued board, comprising:
(i) Eucalyptus pretreatment
(ii) Eucalyptus plywood product conceptual design
(1) raw material Choice and design: take Eucalyptus as primary raw material, had both taken full advantage of the various excellent performance of Eucalyptus, also make the quality of product and combination property more excellent.
(2) product assembly structure: adopt the design of composite table plate structure.This structure can reduce hot pressing pressure and wood compression rate, and the ratio of strength to weight of product is higher, solves high pressure simultaneously, high compression rate product Wet-resilient is large and be out of shape large problem.
(3) veneer machined parameters design: when manufacturing the veneer of glued board, according to thin veneer, is conducive to the mechanical property improving glued board, but too increases the veneer number of plies of glued board, add the difficulty of consumption glue amount and plywood heat pressing process.And apply thick veneer, when particularly the thickness of Eucalyptus brachymedial plate is greater than 2.0mm, the mechanical property of plank is difficult to improve, this mainly due to Eucalyptus veneer thicker time, easily hear from veneer string cut off, layering.
In technical solution of the present invention, veneer thickness controls between 1.2 ~ 2.5mm, and veneer drying adopts roller dryer, can improve veneer flatness, reduces consumption glue amount; Central layer moisture content is below 6%, and dash board moisture content, at 8% ~ l0%, can ensure to reach best mechanical performance index.
(iii) adhesive improvement
One of material that adhesive must use as glued board, can produce free formaldehyde in production with in using, cause environmental pollution.Control Form aldehyde release, reach environmental protection object, must improve its formula and add suitable additive.Adopt Aqua Folium Camelliae sinensis (containing Tea Polyphenols), polyethylene glycol, thiocarbamide, urea liquid etc. through series of process improvement glue, the glued board burst size of methanal≤0.5mg/100g of production, is much higher than national standard, reaches international E0 standard.
(iv) the design of production technology and the improvement of production line, the mainly improvement of bed board equipment
(1) glued board assembly, gluing and heat pressing process
The glue adopted in production, be conducive to improving its curing rate, shortens hot pressing time.Be also noted that the problem in veneer degree of tightness face during assembly, to make the institutional framework of structural plywood symmetrical, reduce product buckling deformation, through test, draw following result
1) hot pressing temperature has the impact shown on bonding strength.When hot pressing temperature is 120 DEG C, the bonding strength of all test specimens is all defective.After temperature is elevated to 130 DEG C, bonding strength has clear improvement, and glue-spread is 200g/m
2the bonding strength mean value of test specimen reach 0.82MPa, minimum of a value is 0.6Mpa; Glue-spread is 250g/m
2the bonding strength mean value of test specimen reach 0.96MPa.When temperature is 140 DEG C, bonding strength is ideal.
2) impact of stacking digestion time on bonding strength of blanket glued veneer highly shows.During blanket glued veneer assembly hot pressing immediately, bonding strength is undesirable; After the 30min ageing, glue performance shows and improves.
3) glue-spread is comparatively large to the effect of bonding strength, but increases the effect too late raising hot pressing temperature of glue-spread and extend the effective of blanket glued veneer digestion time.
4) digestion time Surface Quality (seep through) impact of glue-spread and blanket glued veneer is larger.Glue-spread is 200g/ m
2time, surface is substantially without seep through phenomenon; Glue-spread increases to 250g/ m
2time, after 30-60min ageing, can not there is seep through in surface.
The results showed, preload pressure controls at 1.0 ~ l.2 MPa, and squeeze time is 20min.Hot pressing temperature l25 ~ 140 DEG C; Hot pressing pressure controls at l.2 ~ 1.8MPa, and hot pressing time is 1min/mm.
Use formaldehyde or carbamide resin in present plywood hot-pressing operation, there is serious formaldehyde pollution; And due to production technology backwardness, glued board is the low inferior problem of quality and technical index in wear-resisting, corrosion-resistant, MOR, bonding strength, shock resistance degree etc.Technical scheme of the present invention, uses the adhesive of special process and formula improvement, improves bed board production equipment, solve relevant issues pollution problem and waste of raw materials problem, substantially increase production efficiency, cost-saving more than 25%.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. a preparation method for environment-friendly type high performance Eucalyptus glued board, is characterized in that, comprising:
(1) pretreatment is carried out to Eucalyptus;
(2) Eucalyptus pretreatment obtained, as veneer, adopts composite table plate structure, prepares dash board and central layer; The thickness of veneer is 1.2 ~ 2.5mm, and veneer drying adopts roller dryer, and central layer moisture content is below 6%, and dash board moisture content is at 8 ~ l0%;
(3) use by the obtained adhesive of the Aqua Folium Camelliae sinensis containing Tea Polyphenols, polyethylene glycol, thiocarbamide and urea liquid, by glued board assembly, gluing and heat pressing process, by central layer and dash board bonding, obtained required glued board; The concrete operations of this glued board assembly, gluing and heat pressing process, comprising:
1) hot pressing temperature is after 130-140 DEG C, and glue-spread is 200-250g/m
2;
2), after blanket glued veneer, standing 30-60min carries out ageing;
3) precompressed and hot pressing is carried out after ageing: preload pressure controls at 1.0 ~ l.2 MPa, and squeeze time is 20min; Hot pressing temperature l25 ~ 140 DEG C, hot pressing pressure controls at l.2 ~ 1.8MPa, and hot pressing time is 1min/mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510322130.1A CN104924373A (en) | 2015-06-12 | 2015-06-12 | Preparation method of environmentally-friendly high-performance eucalyptus plywood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510322130.1A CN104924373A (en) | 2015-06-12 | 2015-06-12 | Preparation method of environmentally-friendly high-performance eucalyptus plywood |
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| Publication Number | Publication Date |
|---|---|
| CN104924373A true CN104924373A (en) | 2015-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510322130.1A Pending CN104924373A (en) | 2015-06-12 | 2015-06-12 | Preparation method of environmentally-friendly high-performance eucalyptus plywood |
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Citations (10)
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|---|---|---|---|---|
| GB2113604A (en) * | 1982-01-07 | 1983-08-10 | Matsushita Electric Works Ltd | Method of manufacturing artificial veneers |
| JPS5970502A (en) * | 1982-10-16 | 1984-04-21 | バレリオ・サボルニヤン | Method of construction for veneer-press for pasting thin la-yer material on panel surface formed to various shape |
| FR2680334B1 (en) * | 1991-08-13 | 1995-10-27 | Plagne Daniel | METHOD FOR MANUFACTURING CYLINDRICAL PIPES BASED ON WOOD VENEERS, AND PRODUCT THEREFROM. |
| CN1785622A (en) * | 2005-12-02 | 2006-06-14 | 南京林业大学 | Manufacturing method of high wear resistant dyed poplar wood floor |
| CN1792578A (en) * | 2005-10-26 | 2006-06-28 | 哈尔滨市香坊区人造板胶粘剂研究所 | Method for producing plywood with glueing on one side and plywood mould |
| CN101396839A (en) * | 2007-09-30 | 2009-04-01 | 汤可新 | Preparation method of environmental protection type solid-wood composite floor |
| CN102514057A (en) * | 2012-01-09 | 2012-06-27 | 浙江升华云峰新材股份有限公司 | Method for making non-formaldehyde laminated veneer lumber from gum wood |
| CN102528861A (en) * | 2012-03-05 | 2012-07-04 | 辽宁久久木业有限责任公司 | Production method and manufacturing process for environmentally-friendly decorative board |
| CN103612294A (en) * | 2013-12-03 | 2014-03-05 | 中国林业科学研究院木材工业研究所 | Manufacturing method for eucalyptus flame-retardant artificial board |
| CN103991113A (en) * | 2014-04-22 | 2014-08-20 | 南京林业大学 | Method for manufacturing high intensity plywood for engineering structure by utilizing fast growing wood |
-
2015
- 2015-06-12 CN CN201510322130.1A patent/CN104924373A/en active Pending
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|---|---|---|---|---|
| GB2113604A (en) * | 1982-01-07 | 1983-08-10 | Matsushita Electric Works Ltd | Method of manufacturing artificial veneers |
| JPS5970502A (en) * | 1982-10-16 | 1984-04-21 | バレリオ・サボルニヤン | Method of construction for veneer-press for pasting thin la-yer material on panel surface formed to various shape |
| FR2680334B1 (en) * | 1991-08-13 | 1995-10-27 | Plagne Daniel | METHOD FOR MANUFACTURING CYLINDRICAL PIPES BASED ON WOOD VENEERS, AND PRODUCT THEREFROM. |
| CN1792578A (en) * | 2005-10-26 | 2006-06-28 | 哈尔滨市香坊区人造板胶粘剂研究所 | Method for producing plywood with glueing on one side and plywood mould |
| CN1785622A (en) * | 2005-12-02 | 2006-06-14 | 南京林业大学 | Manufacturing method of high wear resistant dyed poplar wood floor |
| CN101396839A (en) * | 2007-09-30 | 2009-04-01 | 汤可新 | Preparation method of environmental protection type solid-wood composite floor |
| CN102514057A (en) * | 2012-01-09 | 2012-06-27 | 浙江升华云峰新材股份有限公司 | Method for making non-formaldehyde laminated veneer lumber from gum wood |
| CN102528861A (en) * | 2012-03-05 | 2012-07-04 | 辽宁久久木业有限责任公司 | Production method and manufacturing process for environmentally-friendly decorative board |
| CN103612294A (en) * | 2013-12-03 | 2014-03-05 | 中国林业科学研究院木材工业研究所 | Manufacturing method for eucalyptus flame-retardant artificial board |
| CN103991113A (en) * | 2014-04-22 | 2014-08-20 | 南京林业大学 | Method for manufacturing high intensity plywood for engineering structure by utilizing fast growing wood |
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Application publication date: 20150923 |
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