CN114619717A - High-strength anti-deformation veneer shaving board and manufacturing method thereof - Google Patents
High-strength anti-deformation veneer shaving board and manufacturing method thereof Download PDFInfo
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- CN114619717A CN114619717A CN202210259572.6A CN202210259572A CN114619717A CN 114619717 A CN114619717 A CN 114619717A CN 202210259572 A CN202210259572 A CN 202210259572A CN 114619717 A CN114619717 A CN 114619717A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000002023 wood Substances 0.000 claims abstract description 120
- 239000002245 particle Substances 0.000 claims abstract description 18
- 238000007731 hot pressing Methods 0.000 claims abstract description 16
- 239000012792 core layer Substances 0.000 claims description 73
- 239000002344 surface layer Substances 0.000 claims description 65
- 239000000853 adhesive Substances 0.000 claims description 44
- 230000001070 adhesive effect Effects 0.000 claims description 44
- 239000012948 isocyanate Substances 0.000 claims description 23
- 150000002513 isocyanates Chemical class 0.000 claims description 23
- 239000003292 glue Substances 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 7
- 239000010410 layer Substances 0.000 claims description 7
- 229920005610 lignin Polymers 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000005011 phenolic resin Substances 0.000 claims description 7
- 229920001568 phenolic resin Polymers 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 238000004513 sizing Methods 0.000 claims description 5
- 244000166124 Eucalyptus globulus Species 0.000 claims description 3
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 3
- 241000018646 Pinus brutia Species 0.000 claims description 3
- 235000011613 Pinus brutia Nutrition 0.000 claims description 3
- 241000219000 Populus Species 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000007306 turnover Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 9
- 238000012805 post-processing Methods 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000011093 chipboard Substances 0.000 description 2
- 239000011094 fiberboard Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Classifications
-
- 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
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/16—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer formed of particles, e.g. chips, powder or granules
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/002—Manufacture of substantially flat articles, e.g. boards, from particles or fibres characterised by the type of binder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/02—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
- B27N3/14—Distributing or orienting the particles or fibres
-
- 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
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/30—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being formed of particles, e.g. chips, granules, powder
-
- 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
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/06—Vegetal particles
- B32B2264/062—Cellulose particles, e.g. cotton
- B32B2264/067—Wood particles
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The embodiment of the application discloses but high strength anti-deformation veneer particle board, including top layer, sandwich layer and lower top layer, the sandwich layer is located the inboard on top layer and lower top layer, just the sandwich layer passes through the hot pressing mode and is connected with top layer and lower top layer. The application provides a pair of but high strength anti-deformation veneer particle board and manufacturing method thereof, through the non-directional setting of sandwich layer wood shavings, the equidirectional mechanical properties is unanimous almost, be favorable to post processing, and the size of the sandwich layer wood shavings that this particle board used is far less than the big wood chip among the oriented strand board, requirement for the specification of raw and other materials is less relatively, can make full use of path timber and branch material and regular ligneous remainder, when reaching good mechanical properties, the raw and other materials utilization ratio has been improved, the production cost is reduced, through imbedding 45-50% jumbo size wood shavings of the total quality of sandwich layer wood shavings in the sandwich layer wood shavings, the creep resistance of particle board is improved.
Description
Technical Field
The application relates to the field of customized home furnishing, in particular to a high-strength anti-deformation veneerable shaving board and a manufacturing method thereof.
Background
In recent years, customized household products increasingly pay attention to visual integration, and product structures of large-format integrated application artificial boards appear, such as: integrated high door plate product from ground to roof-ultrahigh cabinet door. Super high cabinet door has pleasing to the eye high face value, experiences convenient and fast, prevents to collide with injured, convenient clean and can provide the advantage in bigger more nimble storage space, but the board-like cabinet door bending deformation easily that slightly is higher, and the door is closed not tightly, influences beautifully, and the cabinet door is higher, and the probability of deformation just is big more. Therefore, the super-high cabinet door, a large-breadth integrated product, requires the plate material to have the characteristics of high strength, deformation resistance and light weight, and can ensure that the final product is durable and does not deform. The shaving board with good surface flatness and high cost performance becomes the preferred material of the products, but the strength of the common shaving board is not enough, longitudinal deformation is easily caused, and the phenomena of transverse deformation and slot outburst occur after the straightener is installed. Many furniture enterprises can only select the high density fiberboard temporarily to replace, but the high density fiberboard is because the quality is too heavy, causes the quality problem that the door plant droops easily, the risk that the curb plate bursts the board. Therefore, the project tries to provide a high-quality base material by researching the manufacturing process and evaluation standard of the light-weight, high-strength and deformation-resistant shaving board, and solves the quality problem of deformation of the current ultrahigh cabinet door.
The shaving board produced by the prior art can only meet the national standard requirements in mechanical property, but as an ultrahigh door panel, the common shaving board has small strength (mainly comprising static bending strength, elastic modulus, internal bonding strength and surface bonding strength) and is easy to deform. Although higher density particle boards can meet the strength requirements, high density particle boards are prone to door panel sagging and other problems due to their large mass. In addition, although some oriented strand boards can meet the performance requirements of light weight and high strength, the oriented character of the oriented strand boards causes the forward strength to be always greater than the transverse strength, so that the oriented strand boards still have great deformation risk, and the surface irregularity of the oriented strand boards causes great inconvenience to the post-finishing treatment. The present invention is therefore directed to a lightweight, strong, isotropic and veneerable chipboard product primarily for use as an ultra-high door substrate.
Disclosure of Invention
In view of the above problems, the present application provides a high-strength anti-deformation veneerable chipboard, comprising an upper surface layer, a core layer and a lower surface layer, wherein the core layer is located at the inner side of the upper surface layer and the lower surface layer, and the core layer is connected with the upper surface layer and the lower surface layer through a hot pressing mode.
Preferably, the upper surface layer and the lower surface layer are both 0.9-1.1mm particles, the core layer is a uniform mixture of large-piece wood shavings and small-piece wood shavings, the large-piece wood shavings and the small-piece wood shavings are connected through an adhesive, the large-piece wood shavings account for 25-60% of the total mass of the core layer wood shavings, the large-piece wood shavings are 30-100mm in length, 5-20mm in width, 0.2-0.6mm in thickness, and the small-piece wood shavings are 5-30mm in length, 2-10mm in width and 0.2-0.6mm in thickness.
Preferably, the adhesive is lignin, phenolic resin or isocyanate.
A manufacturing method of a high-strength anti-deformation veneer particle board comprises the following steps:
the method comprises the following steps: preparing wood shavings.
By adjusting the distance of a cutter of a flaker, the wood raw material is sliced into large shavings with the length of 30-100mm and the width of 5-20mm, and the wood raw material is sliced into small shavings with the length of 5-30mm and the width of 2-10 mm.
Step two: drying the shavings
Drying the wood shaving cylinder in a mechanical mode and an air flow mode, and controlling the water content of the wood shaving to be 1-3%;
step three: sizing
Uniformly mixing large flakes and small flakes with an adhesive;
step four: paving
The wood shavings after glue application enter a layer paving machine to be paved in two modes of machinery and air flow, and the wood shavings are sequentially paved according to the sequence of an upper surface layer, a secondary upper surface layer, a core layer, a secondary lower surface layer and a lower surface layer;
step five: hot press cooling
And step four, the finished product paved in the step four enters a prepress for prepressing and forming, then enters a hot press for segmented hot pressing, the pressure of the first segment is increased from 1.0MPa to 3.6MPa, then is gradually reduced to 0.3-0.4MPa, the hot pressing temperature is gradually reduced from 220-230 ℃ to 180-185 ℃ at the inlet for hot pressing, the hot pressing time is 3-4min, and then enters a cooling panel turnover machine for cooling and stacking and curing.
Preferably, in the first step, the wood shavings raw material is poplar, pine, eucalyptus or miscellaneous wood.
Preferably, in the third step, when the lignin adhesive is adopted, the glue application amount of the surface layer is 8-13% of that of the absolutely dry wood shavings of the surface layer, 0-1% of isocyanate adhesive is applied at the same time, the glue application amount of the core layer is 1-3% of that of the absolutely dry wood shavings of the core layer, and 3-5% of isocyanate adhesive is added at the same time; when the phenolic resin adhesive is adopted, the glue application amount of the surface layer is 8-14% of that of the absolutely dry wood shavings of the surface layer, 0-1% of isocyanate adhesive is applied at the same time, the glue application amount of the core layer is 0.5-5% of that of the absolutely dry wood shavings of the core layer, and 4-6% of isocyanate adhesive is added at the same time; when the isocyanate adhesive is adopted, the surface layer adhesive amount is 3-6%, and the core layer adhesive amount is 3-6%.
Preferably, the large-sized core layer wood shavings in the step four are paved in a non-directional mode, and the ratio of the surface layer wood shavings quality to the core layer wood shavings quality is controlled to be 35: 65-45: 55, adding large-piece wood shavings with the length of about 30-100mm and the width of about 5-20mm into the core layer, and controlling the water content of the large-piece wood shavings to be: 2-3 percent of the core layer wood shavings, wherein the addition amount of the large-piece wood shavings accounts for 40-50 percent of the total mass of the core layer wood shavings.
The invention has the following beneficial effects:
the application provides a pair of but high strength anti-deformation veneer shaving board and preparation method thereof, size, moisture content and the addition through studying the sandwich layer wood shavings, developed sandwich layer wood shavings form control technology, this technological core main points are: controlling the ratio of the surface layer wood shaving quality to the core layer wood shaving quality of the shaving board to be 35: 65-45: 55, adding large-piece wood shavings with the length of about 30-100mm and the width of about 5-20mm into the core layer, and controlling the water content of the large-piece wood shavings to be: 2-3%, wherein the addition amount of the large-piece wood shavings accounts for 40-50% of the total mass of the core layer wood shavings, and the creep resistance of the shaving board is improved by embedding large-size wood shavings accounting for 45-50% of the total mass of the core layer wood shavings into the core layer wood shavings.
The application provides a pair of but high strength anti-deformation veneer shaving board and manufacturing method thereof, through the non-directional setting of sandwich layer wood shavings, the equidirectional mechanical properties is unanimous almost, is favorable to post processing to handle, and the sandwich layer wood shavings size that this shaving board used is far less than the big wood chip among the oriented strand board, and the specification requirement to raw and other materials is less relatively, can make full use of path timber and branch timber and regular ligneous remainder. The material utilization rate is improved and the production cost is reduced while good mechanical properties are achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
figure 2 is a schematic representation of the performance of a particle board according to example 1 of the present invention;
figure 3 is a schematic representation of the performance of a particle board according to example 2 of the present invention;
figure 4 is a schematic representation of the performance of a particle board according to example 3 of the present invention.
In the figure: 1. an upper surface layer; 2. a core layer; 3. and (4) a lower surface layer.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, a high-strength anti-deformation veneer board includes an upper surface layer 1, a core layer 2 and a lower surface layer 3, wherein the core layer 2 is located inside the upper surface layer 1 and the lower surface layer 3, and the core layer 2 is connected with the upper surface layer 1 and the lower surface layer 3 by hot pressing.
The upper surface layer 1 and the lower surface layer 2 are both particles of 0.9-1.1mm, the core layer 2 is a uniform mixture of large-piece wood shavings and small-piece wood shavings, the large-piece wood shavings and the small-piece wood shavings are connected through an adhesive, the large-piece wood shavings account for 25-60% of the total mass of the core layer wood shavings, the large-piece wood shavings are 30-100mm in length, 5-20mm in width, 0.2-0.6mm in thickness, 5-30mm in length, 2-10mm in width and 0.2-0.6mm in thickness, and the deformation resistance of the shaving board is improved by embedding a certain proportion of the large-piece wood shavings into the core layer wood shavings.
The adhesive is lignin, phenolic resin or isocyanate.
The method comprises the following steps:
the method comprises the following steps: preparing wood shavings.
By adjusting the distance of a cutter of a flaker, the wood raw material is sliced into large shavings with the length of 30-100mm and the width of 5-20mm, and the wood raw material is sliced into small shavings with the length of 5-30mm and the width of 2-10 mm.
Step two: drying the shavings
Drying the wood shaving cylinder in a mechanical mode and an air flow mode, and controlling the water content of the wood shaving to be 1-3%;
step three: sizing
Uniformly mixing large flakes and small flakes with an adhesive;
step four: paving
The wood shavings after glue application enter a layer paving machine to be paved in two modes of machinery and air flow, and the wood shavings are sequentially paved according to the sequence of an upper surface layer, a secondary upper surface layer, a core layer, a secondary lower surface layer and a lower surface layer;
step five: hot press cooling
And step four, the finished product paved in the step four enters a prepress for prepressing and forming, then enters a hot press for segmented hot pressing, the pressure of the first segment is increased from 1.0MPa to 3.6MPa, then is gradually reduced to 0.3-0.4MPa, the hot pressing temperature is gradually reduced from 220-230 ℃ to 180-185 ℃ at the inlet for hot pressing, the hot pressing time is 3-4min, and then enters a cooling panel turnover machine for cooling and stacking and curing.
In the first step, the wood shavings are made of poplar, pine, eucalyptus or miscellaneous wood.
In the third step, when the lignin adhesive is adopted, the glue application amount of the surface layer is 8-13% of the absolutely dry wood shavings of the surface layer, 0-1% of isocyanate adhesive is applied at the same time, the glue application amount of the core layer is 1-3% of the absolutely dry wood shavings of the core layer, and 3-5% of isocyanate adhesive is added at the same time; when the phenolic resin adhesive is adopted, the glue application amount of the surface layer is 8-14% of that of the absolutely dry wood shavings of the surface layer, 0-1% of isocyanate adhesive is applied at the same time, the glue application amount of the core layer is 0.5-5% of that of the absolutely dry wood shavings of the core layer, and 4-6% of isocyanate adhesive is added at the same time; when the isocyanate adhesive is adopted, the surface layer adhesive amount is 3-6%, and the core layer adhesive amount is 3-6%, so that the strength performance of the shaving board is improved and the deformation resistance of the shaving board is further improved by controlling the adhesive amount.
The large core layer wood shavings in the four steps are paved in a non-directional mode, through the non-directional arrangement of the core layer wood shavings, the mechanical properties in different directions are almost consistent, the post-processing treatment is facilitated, the size of the core layer wood shavings used by the shaving board is far smaller than the large wood pieces in the oriented shaving board, the specification requirement on raw materials is relatively small, and the small-diameter wood, branch wood and regular wood residues can be fully utilized. The material utilization rate is improved and the production cost is reduced while good mechanical properties are achieved.
The core layer wood shaving form control technology is developed by researching the size, the water content and the addition amount of the core layer wood shaving. The key points of the technology are as follows: controlling the ratio of the surface layer wood shaving quality to the core layer wood shaving quality of the shaving board to be 35: 65-45: 55, adding large-piece wood shavings with the length of about 30-100mm and the width of about 5-20mm into the core layer, and controlling the water content of the large-piece wood shavings to be: 2-3%, wherein the addition amount of the large-piece wood shavings accounts for 40-50% of the total mass of the core layer wood shavings, and the creep resistance of the shaving board is improved by embedding large-size wood shavings accounting for 45-50% of the total mass of the core layer wood shavings into the core layer wood shavings.
Example 1:
the isocyanate adhesive is used, and the core layer large-piece wood shavings account for 35% of the total mass of the core layer wood shavings. The surface layer sizing amount is 5% of the mass of the surface layer absolutely dry wood shavings, the core layer sizing amount is 5% of the mass of the core layer absolutely dry wood shavings, and meanwhile, 1% of the tackifier of the mass of the absolutely dry wood shavings is applied.
Example 2:
the phenolic resin adhesive is used, and the core layer large-piece wood shavings account for 40% of the total mass of the core layer wood shavings. The surface layer gluing amount is 12% of the mass of the surface layer absolutely dry wood shavings, the isocyanate adhesive accounting for 0.5% of the mass of the surface layer absolutely dry wood shavings is applied, the core layer gluing amount is 1% of the core layer absolutely dry wood shavings, and the 5% of the isocyanate adhesive is added.
Example 3:
the lignin adhesive is used, and the core layer large-piece wood shavings account for 45% of the total mass of the core layer wood shavings. The surface layer glue application amount is 11.3% of the mass of the surface layer absolutely dry wood shavings, meanwhile, an isocyanate adhesive which accounts for 0.5% of the mass of the surface layer absolutely dry wood shavings is applied, the core layer glue application amount is 2% of the core layer absolutely dry wood shavings, and meanwhile, 3.2% of the isocyanate adhesive is added.
Finally, it should be noted that: the electrical components related to the present application are all commercially available and are all prior art, and the above embodiments are only used for illustrating the technical solution of the present application and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (7)
1. A high-strength anti-deformation veneer particle board comprises an upper surface layer (1), a core layer (2) and a lower surface layer (3), and is characterized in that the core layer (2) is positioned on the inner sides of the upper surface layer (1) and the lower surface layer (3), and the core layer (2) is connected with the upper surface layer (1) and the lower surface layer (3) in a hot pressing mode.
2. The high-strength anti-deformation veneerable particle board as claimed in claim 1, wherein the upper surface layer (1) and the lower surface layer (2) are both particles of 0.9-1.1mm, the core layer (2) is a uniform mixture of large flakes and small flakes, and the large flakes and the small flakes are connected by adhesive, and the large flakes account for 25-60% of the total mass of the core layer flakes, the large flakes have a length of 30-100mm, a width of 5-20mm, a thickness of 0.2-0.6mm, and the small flakes have a length of 5-30mm, a width of 2-10mm, and a thickness of 0.2-0.6 mm.
3. The high strength, deformation resistant, veneer board of claim 2, wherein said adhesive is lignin, phenolic resin or isocyanate.
4. A method of making high strength, deformation resistant, veneer particle board as claimed in any one of claims 1 to 3, comprising the steps of:
the method comprises the following steps: and (4) preparing wood shavings.
By adjusting the distance of a cutter of a flaker, the wood raw material is sliced into large shavings with the length of 30-100mm and the width of 5-20mm, and the wood raw material is sliced into small shavings with the length of 5-30mm and the width of 2-10 mm.
Step two: drying the shavings
Drying the wood shaving cylinder in a mechanical mode and an air flow mode, and controlling the water content of the wood shaving to be 1-3%;
step three: sizing
Uniformly mixing large flakes and small flakes with an adhesive;
step four: paving
The wood shavings after glue application enter a layer paving machine to be paved in two modes of machinery and air flow, and the wood shavings are sequentially paved according to the sequence of an upper surface layer, a secondary upper surface layer, a core layer, a secondary lower surface layer and a lower surface layer;
step five: hot press cooling
And step four, the finished product paved in the step four enters a prepress for prepressing and forming, then enters a hot press for segmented hot pressing, the pressure of the first segment is increased from 1.0MPa to 3.6MPa, then is gradually reduced to 0.3-0.4MPa, the hot pressing temperature is gradually reduced from 220-230 ℃ to 180-185 ℃ at the inlet for hot pressing, the hot pressing time is 3-4min, and then enters a cooling panel turnover machine for cooling and stacking and curing.
5. The method as claimed in claim 4, wherein the shavings are selected from poplar, pine, eucalyptus or miscellaneous tree.
6. The method for manufacturing the high-strength anti-deformation veneer particle board as claimed in claim 4, wherein in the third step, when the lignin adhesive is adopted, the surface layer is applied with 8-13% of the surface layer of the absolutely dry wood shavings, 0-1% of isocyanate adhesive is simultaneously applied, the core layer is applied with 1-3% of the core layer of the absolutely dry wood shavings, and 3-5% of isocyanate adhesive is simultaneously added; when the phenolic resin adhesive is adopted, the glue application amount of the surface layer is 8-14% of that of the absolutely dry wood shavings of the surface layer, 0-1% of isocyanate adhesive is applied at the same time, the glue application amount of the core layer is 0.5-5% of that of the absolutely dry wood shavings of the core layer, and 4-6% of isocyanate adhesive is added at the same time; when the isocyanate adhesive is adopted, the surface layer adhesive amount is 3-6%, and the core layer adhesive amount is 3-6%.
7. The method of claim 4 wherein the step of applying the non-directional pattern to the large strands of the core layer comprises the step of applying a non-directional pattern to the large strands of the core layer, wherein the ratio of the mass of the strands in the surface layer to the mass of the strands in the core layer of the particle board is controlled to be 35: 65-45: 55, adding large-piece wood shavings with the length of about 30-100mm and the width of about 5-20mm into the core layer, and controlling the water content of the large-piece wood shavings to be: 2-3 percent of the core layer wood shavings, wherein the addition amount of the large-piece wood shavings accounts for 40-50 percent of the total mass of the core layer wood shavings.
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