CN113021559A - Production process of high-strength environment-friendly particle board - Google Patents
Production process of high-strength environment-friendly particle board Download PDFInfo
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- CN113021559A CN113021559A CN201911345245.7A CN201911345245A CN113021559A CN 113021559 A CN113021559 A CN 113021559A CN 201911345245 A CN201911345245 A CN 201911345245A CN 113021559 A CN113021559 A CN 113021559A
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- production process
- particle board
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- core layer
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- 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
- B27N3/002—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
- B27N3/08—Moulding or pressing
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention relates to a production process of a high-strength environment-friendly particle board. According to the production process of the high-strength environment-friendly particle board, the prepared environment-friendly particle board finished product is formaldehyde-free and environment-friendly; good thermosetting property, strong waterproof and fireproof performance and long service life; high strength and uneasy deformation.
Description
Technical Field
The invention belongs to the technical field of artificial boards, and particularly relates to a production process of a high-strength environment-friendly particle board.
Background
The damp-proof board is also called environmental protection particle board and particle board, and is an artificial board made of wood or other wood cellulose material crushed material and glued under the action of heat and pressure after the adhesive is applied. The environment-friendly particle board has stronger moisture resistance and smaller expansion coefficient after absorbing moisture, and is widely used as a raw material for cabinet products with humid environments, such as cabinets, bathroom cabinets and the like.
The defects of the prior art are as follows: the existing environment-friendly particle board can be used in formaldehyde, and can cause formaldehyde poisoning and harm to human bodies in rooms with excessive formaldehyde.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a production process of a high-strength environment-friendly particle board, the prepared moisture-proof particle board finished product has the advantages of no formaldehyde, good thermosetting property, strong waterproof and fireproof performances and high strength, and the production process is easy to realize.
The technical purpose of the invention is realized by the following technical scheme: the production process of the high-strength environment-friendly particle board comprises the following production steps:
(1) slicing: selecting raw materials such as raw brushwood, outsourcing wood chips and furniture waste for chipping treatment to prepare chips;
(2) slicing: planing the small wood chips cut out in the step (1) into wood shaving particles with the specification and the size;
(3) and (3) drying: drying the wood shaving particles by using a single-rotary-drum dryer until the water content is 1.0-3.5%;
(4) screening: dividing the dried wood shaving particles into a surface layer and a core layer;
(5) glue mixing: respectively carrying out glue mixing treatment on the surface layer and the core layer in the step (4), and respectively mixing diphenylmethane diisocyanate, an aldehyde-free adhesive and a light filler with the surface layer and the core layer;
(6) paving: paving the surface layer and the core layer as required to prepare a plate blank;
(7) pre-pressing: pressing a plate blank in a continuous prepressing mode;
(8) hot pressing: after the plate blank enters the press, the hydraulic oil cylinders on the two sides of the press and the multiple oil cylinders in the front of the press act on the hot press plate to completely cure the adhesive in the plate blank, so that the plate blank is bonded to prepare the environment-friendly particle plate;
(9) and (3) post-processing: and (3) turning the prepared plate blank, stacking, curing, sanding, sawing to obtain a finished particle plate, sorting and warehousing.
Preferably, the aldehyde-free adhesive is prepared by the following steps:
(1) preparation of component A: adding required water into a reaction kettle, sequentially adding required polyvinyl alcohol, xanthan gum and vinyl acetate-acrylic emulsion into the reaction kettle, heating to a specified temperature, stirring for 0.5h, cooling, adding required starch and vegetable protein, stirring again, adjusting the pH value to 7.5-8.0, cooling, stirring, discharging, sealing and storing;
(2) preparing a component B: firstly, putting required DBP and DOP into a reaction kettle, uniformly mixing, then sequentially adding MDI glue, heating to a specified temperature under the protection of nitrogen, stirring for 0.5h, cooling, discharging, sealing and storing;
(3) before use, the required component A and the component B are mixed to obtain the adhesive which does not contain formaldehyde and has good initial viscosity.
Preferably, the lightweight filler is a polyurethane foaming agent.
Preferably, in the step (5), 5 to 6 weight percent of diphenylmethane diisocyanate, 5.5 to 6.5 weight percent of aldehyde-free adhesive and 0.8 to 1.2 weight percent of light filler are added into the surface layer, and the rest is the surface layer.
Preferably, in the step (5), the core layer is added with 4-5% of diphenylmethane diisocyanate and 1-1.6% of light filler by weight, and the rest is the core layer.
In conclusion, the invention has the following beneficial effects:
firstly, the paint is formaldehyde-free and environment-friendly;
secondly, the thermosetting property is good, the waterproof and fireproof performance is strong, and the service life is long;
thirdly, high strength and difficult deformation.
Detailed Description
The present invention is described in detail below.
(1) Slicing: selecting raw materials with lower density;
(2) chipping: chipping the raw materials selected in the step (1) after stacking to a height of 5 meters to obtain slices with the thickness of 10-30 mm;
(3) slicing: adopting a German Parlman ring type flaker PZKP14-450 to slice the slices into shaving particles with the length of 10-25 mm, the width of 4-10 mmh and the thickness of 0.2-0.5 mm;
(4) and (3) drying: drying the wood shaving particles by using a single-rotary-drum dryer until the water content is 1.0-3.5%;
(5) screening: screening the surface layer and the core layer of the dried wood shaving particles by adopting screening equipment with 1.35mm sieve pores, wherein the surface layer is less than 1.35mm, and the core layer is on the contrary;
(6) glue mixing: respectively carrying out glue mixing treatment on the surface layer and the core layer, and respectively mixing diphenylmethane diisocyanate, a formaldehyde-free adhesive and a light filler with the surface layer and the core layer;
(7) paving: paving the surface layer and the core layer as required to prepare a plate blank, detecting the actual weight of the paved plate blank by using a plate blank belt scale, then detecting the fluctuation condition of the weight of the plate blank by using a movable density detector, removing impurities such as iron, aluminum, copper and the like in the plate blank by using an iron remover and a metal detector, prepressing by using a prepress machine, and finally sending the plate blank which does not meet the requirement to a recovery bin for reuse;
(8) pre-pressing: adopting a roller type continuous prepressing pressing plate blank;
(9) hot pressing: after the plate blank enters the press, the hydraulic oil cylinders on the two sides of the press and the multiple oil cylinders in the front of the press act on the hot press plate to completely cure the adhesive in the plate blank, so that the plate blank is bonded to prepare the environment-friendly particle plate;
(10) and (3) post-processing: and (3) turning the prepared plate blank, stacking, curing, sanding, sawing to obtain a finished particle plate, sorting and warehousing.
The slice thickness in the step (2) is 10-30 mm.
The size of the wood shaving particles in the step (3) is 10-25 mm, the width is 4-10 mm, and the thickness is 0.2-0.5 mm.
The water content after drying in the step (3) is 1.0-3.5.
And (4) screening the surface layer and the core layer by adopting screening equipment with 1.35mm screen holes, wherein the surface layer is screened when the screen hole is smaller than 1.35mm, and the core layer is screened when the screen hole is not larger than 1.35 mm.
The invention discloses a preparation method and application of an aldehyde-free adhesive, which is published by the prior application under the publication number CN 108504320A.
The light filler is a polyurethane foaming agent.
In the step (5), 5 to 6 weight percent of diphenylmethane diisocyanate, 5.5 to 6.5 weight percent of aldehyde-free adhesive and 0.8 to 1.2 weight percent of light filler are added into the surface layer, and the rest is the surface layer.
In the step (5), 4-5 wt% of diphenylmethane diisocyanate and 1-1.6 wt% of light filler are added into the core layer, and the rest is the core layer.
Example 1
Table 1: zero-formaldehyde moisture-proof particle board performance index
| Detecting items | The result of the detection |
| Water content% | 6.8 |
| In-board density deviation/%) | -1.5，+4.5 |
| Static bending strength/(MPa) | 14.8 |
| Modulus of elasticity/(MPa) | 2230 |
| Internal bonding strength/(MPa) | 0.57 |
| Surface bonding strength/(MPa) | 0.98 |
| 2h water absorption thickness swell ratio% | 6.7 |
| Formaldehyde emission/(mg/m 3) | 0.043 |
Detection items show that the water content is 6.8 board internal density deviation/% -1.5, +4.5 static bending strength/(MPa) 14.8 elastic modulus/(MPa) 2230 internal bonding strength/(MPa) 0.57 surface bonding strength/(MPa) 0.982h water absorption thickness expansion rate/% 6.7 formaldehyde emission/(mg/m 3)0.043
Example 2
Table 2: detection data of PMDI ecological glue:
| detecting items | The result of the detection |
| Appearance of the product | Brown liquid |
| Viscosity (25 ℃ C.)/(mPa. multidot.s) | 206 |
| Isocyanate content (-NCO)/%) | 31.14 |
| Hydrolyzed chlorine/%) | 0.04 |
| Acidity/%) | 0.0034 |
| Density (25 ℃)/(g/cm ^3) | 1.233 |
| Iron content/(ug/g) | 3 |
The product name is as follows: polymethylene polyphenyl isocyanates
Examination of test items the apparent brown liquid viscosity (25 ℃ C.)/(mPas) 206 isocyanate content (-NCO)/% 31.14 hydrolysis chloride/% 0.04 acidity/% 0.0034 density (25 ℃ C.)/(g/cm ^3)1.233 iron component/(ug/g) 3
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (8)
1. A production process of a high-strength environment-friendly particle board is characterized by comprising the following production steps:
(1) slicing: selecting raw materials such as raw brushwood, outsourcing wood chips and furniture waste for chipping treatment to prepare chips;
(2) slicing: planing the small wood chips cut out in the step (1) into wood shaving particles with the specification and the size;
(3) and (3) drying: drying the wood shaving particles by using a single-rotary-drum dryer;
(4) screening: dividing the dried wood shaving particles into a surface layer and a core layer;
(5) glue mixing: respectively carrying out glue mixing treatment on the surface layer and the core layer, and respectively mixing diphenylmethane diisocyanate, a formaldehyde-free adhesive and a light filler with the surface layer and the core layer;
(6) paving: paving the surface layer and the core layer as required to prepare a plate blank;
(7) pre-pressing: pressing a plate blank in a continuous prepressing mode;
(8) hot pressing: after the plate blank enters the press, the hydraulic oil cylinders on the two sides of the press and the multiple oil cylinders in the front of the press act on the hot press plate to completely cure the adhesive in the plate blank, so that the plate blank is bonded to prepare the environment-friendly particle plate;
(9) and (3) post-processing: and (3) turning the prepared plate blank, stacking, curing, sanding, and sawing to obtain the finished particle board.
2. The production process of the high-strength environment-friendly particle board as claimed in claim 1, wherein the production process comprises the following steps: the slice thickness in the step (2) is 10-30 mm.
3. The production process of the high-strength environment-friendly particle board as claimed in claim 1, wherein the production process comprises the following steps: the size of the wood shaving particles in the step (3) is 10-25 mm, the width is 4-10 mm, and the thickness is 0.2-0.5 mm.
4. The production process of the high-strength environment-friendly particle board as claimed in claim 1, wherein the production process comprises the following steps: the water content after drying in the step (3) is 1.0-3.5.
5. The production process of the high-strength environment-friendly particle board as claimed in claim 1, wherein the production process comprises the following steps: and (4) screening the surface layer and the core layer by adopting screening equipment with 1.35mm screen holes, wherein the surface layer is screened when the screen hole is smaller than 1.35mm, and the core layer is screened when the screen hole is not larger than 1.35 mm.
6. The production process of the high-strength environment-friendly particle board as claimed in claim 1, wherein the production process comprises the following steps: the light filler is a polyurethane foaming agent.
7. The production process of the high-strength environment-friendly particle board as claimed in claim 1, wherein the production process comprises the following steps: in the step (5), 5 to 6 weight percent of diphenylmethane diisocyanate, 5.5 to 6.5 weight percent of aldehyde-free adhesive and 0.8 to 1.2 weight percent of light filler are added into the surface layer, and the rest is the surface layer.
8. The production process of the high-strength environment-friendly particle board as claimed in claim 1, wherein the production process comprises the following steps: in the step (5), 4-5 wt% of diphenylmethane diisocyanate and 1-1.6 wt% of light filler are added into the core layer, and the rest is the core layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911345245.7A CN113021559A (en) | 2019-12-24 | 2019-12-24 | Production process of high-strength environment-friendly particle board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911345245.7A CN113021559A (en) | 2019-12-24 | 2019-12-24 | Production process of high-strength environment-friendly particle board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113021559A true CN113021559A (en) | 2021-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911345245.7A Withdrawn CN113021559A (en) | 2019-12-24 | 2019-12-24 | Production process of high-strength environment-friendly particle board |
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| Country | Link |
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| CN (1) | CN113021559A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115446946A (en) * | 2022-09-22 | 2022-12-09 | 普兰设计工程(济南)有限公司 | Preparation process of formaldehyde-free wood-based board |
| CN116604670A (en) * | 2023-05-22 | 2023-08-18 | 广东始兴县华洲木业有限公司 | Composite bamboo board and preparation method thereof |
-
2019
- 2019-12-24 CN CN201911345245.7A patent/CN113021559A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115446946A (en) * | 2022-09-22 | 2022-12-09 | 普兰设计工程(济南)有限公司 | Preparation process of formaldehyde-free wood-based board |
| CN116604670A (en) * | 2023-05-22 | 2023-08-18 | 广东始兴县华洲木业有限公司 | Composite bamboo board and preparation method thereof |
| CN116604670B (en) * | 2023-05-22 | 2024-02-20 | 广东始兴县华洲木业有限公司 | Composite bamboo board and preparation method thereof |
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| PB01 | Publication | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210625 |
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| WW01 | Invention patent application withdrawn after publication |