CN104669395A - Manufacture method of low-density fiberboard - Google Patents
Manufacture method of low-density fiberboard Download PDFInfo
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- CN104669395A CN104669395A CN201510078529.XA CN201510078529A CN104669395A CN 104669395 A CN104669395 A CN 104669395A CN 201510078529 A CN201510078529 A CN 201510078529A CN 104669395 A CN104669395 A CN 104669395A
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- Prior art keywords
- density fiberboard
- density
- low
- low density
- manufacture method
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Classifications
-
- 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
- B27N1/00—Pretreatment of moulding material
- B27N1/02—Mixing the material with binding agent
-
- 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
- B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
-
- 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
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
Abstract
The invention discloses a manufacture method of a low-density fiberboard. The manufacture method is a continuous press flat pressing method. After wooden raw materials are made into fibers, 10 to 16 percent of environment-friendly wood adhesive and an appropriate amount of waterproof agent are added, and then the low-density fiberboard can be prepared in the steps of drying, sorting, laying, pre-pressing forming, heat pressing, turning cooling, abrasive grinding, inspection, grading, warehousing, packing and the like. The manufacture method is characterized by comprising the following steps: (1) pretreatment of the surface of a board blank, namely carrying out the humidifying treatment on the upper surface and the lower surface of the board blank when in laying; (2) design of a heat pressing process, namely, setting a heat pressing temperature (190 to 235 DEG C), heat pressing pressure (25 to 39 MPa) and a heat pressing coefficient (6.5 to 8.0 s/mm).The low-density fiberboard with density of 450 to 650 kg/m<3> is prepared by utilizing the method. The prepared low-density fiberboard has characteristics of low density and good load-bearing capability and is applicable to the fields such as building decoration veneer, a furniture board, artware, furniture manufacture, indoor decoration and the like. Not only can the wood resource be remarkably saved and the production and transportation cost be reduced, but also the structure and application field of the artificial board products can be enlarged.
Description
Technical field
The present invention relates to the manufacture method of wooden beaver board, specifically the manufacture method of low density fiberboard.
Background technology
Fiberboard is divided into four classes according to the density of fiberboard by China, fiberboard nominal density being less than or equal to 0.45g/cm3 is light fiberboard, nominal density is low density fiberboard between 0.45g/cm3 ~ 0.65g/cm3, nominal density is medium density fibre board (MDF) between 0.65g/cm3 ~ 0.80g/cm3, and what nominal density was greater than 0.80g/cm3 is high density fiberboard.Light fiberboard light weight, voidage is large, there is good thermal insulation and sound absorption properties, the multiplex cladding material doing public building inside, medium density fibre board (MDF) even structure, density and physical and mechanical property are all moderate, have good re-workability, the thickness range of product is also wider, is widely used in the aspects such as Furniture manufacture, floor production, indoor decorating.And high density fiberboard due to density large, so internal organizational structure is the finest and closely woven, particularly there is closely knit edge, the edge of various abnormal shape can be processed into, the manufacture etc. of indoor and outdoor decoration, sound equipment, top-grade furniture is widely used in every physical and mechanical property of its excellence, directly be processed into consolidated floor and composite floor board as floor base material especially in recent years, be subject to the welcome of consumers in general.The most middle and higher density fiberboard being greater than 0.65g/cm3 based on production density of Fibreboard Production enterprise of China, density but rarely has enterprise to produce at the low density fiberboard of 0.45g/cm3 ~ 0.65g/cm3 scope., at present without national standard, and there is common technology bottleneck, the situations such as unstable product quality in existing low-density fibre plate technique.Therefore manufacturer is few, and batch quantity-produced enterprise is just less.
Summary of the invention
Object of the present invention provides a kind of manufacture method applying wood material processing and manufacturing low density fiberboard, utilizes the production line of existing middle and higher density plate to prepare by improving and optimizating of technology the low density fiberboard that density is every cubic metre of 450-650 kilogram.This low density fiberboard has the characteristic that density is low, load-bearing property is good, can be applied to the field such as dividing plate, body of wall, skirting, handicraft, Furniture manufacture, interior decoration of building decoration decoration panel, furniture.
The present invention is achieved through the following technical solutions (percentage of employing is percetage by weight).
A manufacture method for low density fiberboard, described manufacture method is continuous press flat-press process, it is characterized in that through following process steps:
(1) pretreatment of steel slab surface, slab carries out humidification process when mating formation to upper and lower surface;
(2) heat pressing process, if continuous flat press first, second, third and fourth, the hot pressing temperature in 5th district be respectively 220-235 DEG C, 205-220 DEG C, 190-205 DEG C, 170-190 DEG C, 160-170 DEG C, the hot pressing pressure in corresponding the first to five district of setting is 25.0 ~ 39.0MPa, 10.0 ~ 22.0MPa, 3.0 ~ 4.0MPa, 12.0 ~ 15.0MPa, 4.5 ~ 6.0MPa, is that 6.5 ~ 8.0s/mm carries out hot pressing production to the slab after precompressed at thermal ventilation.
Described upper and lower surperficial amount of humidification is respectively 16-25ml/m
2, 14-22ml/m
2.
After wood material is made fiber, add 10% ~ 16% environmental protection series wood adhesive and appropriate waterproofing agent.
Described environmental protection series wood adhesive to be mol ratio be less than 1.0 E1/EO grade urea-formaldehyde resin or cyanurotriamide modified urea resin or melamine urea-formaldehyde resin in a kind of one to two or three mixing of or arbitrary proportion.
Described waterproofing agent is one or both arbitrary proportions mixing in solid melt paraffin or emulsified wax.
Its manufacture method mainly comprises following processing step:
(1) fiber preparation: utilize drum chipper to cut wood material, be prepared into length be 15-30mm, wide for 15-25mm, thickness be the wood chip of 3-5mm.Wood chip carries out pre-cooked under washing is placed on 70 ~ 85 DEG C of conditions, again through cooker at steam pressure 0.75-0.85MPa, carry out the boiling of 1.8-2.5 minute under the condition of temperature 160-165 DEG C, carry out defibrator process again after softening to chip steaming and add a certain amount of melt paraffin or emulsion paraffin water repellent;
(2) applying glue and drying: wood fibre first applies environmental protection series wood adhesive before entering drying duct, dry 5.0 ~ 10.0s after applying glue, and control raw aqueous rate 7.5 ~ 10.5%;
(3) to mat formation and precompressed: fiber carries out slab precompressed with the pressure of 11.50 ~ 13.0MPa after being mated formation by machinery, and carries out edging to slab, and be then humidified in the upper and lower surface of slab, upper and lower surperficial amount of humidification is respectively 16-25ml/m
2, 14-22ml/m
2;
(4) sheet material hot pressing: setting continuous flat press first, second, third and fourth, the hot pressing temperature in 5th district be respectively 220-235 DEG C, 205-220 DEG C, 190-205 DEG C, 170-190 DEG C, 160-170 DEG C.The hot pressing pressure resetting corresponding the first to five district is 25.0 ~ 39.0MPa, 10.0 ~ 22.0MPa, 3.0 ~ 4.0MPa, 12.0 ~ 15.0MPa, 4.5 ~ 6.0MPa, be that 6.5 ~ 8.0s/mm carries out hot pressing to the slab after precompressed at thermal ventilation, being pressed into density is 450 ~ 650Kg/m
3semifinished sheet;
(5) sheet material post processing: the sheet material completing hot pressing is placed in constant temperature and humidity 48h under temperature 25 ~ 30 DEG C, humidity 50 ~ 60% condition, carry out sanding by the sander of 8-10 sand frame and a polishing machine carries out polishing, more namely obtain required low-density fibre panel products through inspection, sawing, packing.
Beneficial effect of the present invention: the present invention adopts existing medium/high density production line, prepare the low density fiberboard that density is only every cubic metre of 450-650 kilogram, this low density fiberboard has the characteristic that density is low, load-bearing property is good, after veneer, processing of spraying paint, become building decoration decoration panel, be applied to the fields such as the dividing plate of furniture, body of wall, skirting, handicraft, Furniture manufacture, interior decoration.Lumber consumption of the present invention, power consumption, sewage have more advantage with toxic emission compared with middle-high density fiber, compared with medium density fibre board (MDF), can save wood fibre 100Kg/m3, improve timber resources utilization rate more than 15%.And due to the weight of this low density fiberboard lighter, also can reduce manpower consumption and the cost of transportation of carrying.The present invention can not only significantly save timber resources, preserves the ecological environment, reduce production cost and cost of transportation, has expanded structure and the application of wood-based panel product simultaneously.
Detailed description of the invention
Further describe the present invention below in conjunction with specific embodiment, embodiment is only exemplary, does not form any restriction to scope of the present invention.It will be understood by those skilled in the art that and can modify to the details of technical solution of the present invention and form or replace down without departing from the spirit and scope of the present invention, these amendments and replacement all fall into scope.
Following examples implement (15mm thickness of slab) on the production line of existing medium/high density board:
Embodiment 1
(1) utilize drum chipper to cut wood material, be prepared into length be 20-25mm, wide for 15-20mm, thickness be the wood chip of 3-4mm.Wood chip carries out pre-cooked under washing is placed on 75 ~ 80 DEG C of conditions, again through cooker at steam pressure 0.75-0.80MPa, carry out the boiling of 1.9-2.2 minute under the condition of temperature 162-165 DEG C, carry out defibrator process again after softening to chip steaming and add a certain amount of melt paraffin or emulsion paraffin water repellent;
(2) applying glue and drying: wood fibre first applies environmental protection series wood adhesive before entering drying duct, dry 7.0 ~ 8.0s after applying glue, and control raw aqueous rate 8.8 ~ 9.2%;
(3) to mat formation and precompressed: fiber carries out slab precompressed with the pressure of 12.00 ~ 12.5MPa after being mated formation by machinery, and carries out edging to slab, and be then humidified in the upper and lower surface of slab, upper and lower surperficial amount of humidification is respectively 18-20ml/m
2, 15-20ml/m
2;
(4) sheet material hot pressing: setting continuous flat press first, second, third and fourth, the hot pressing temperature in 5th district be respectively 225-230 DEG C, 210-215 DEG C, 195-200 DEG C, 180-185 DEG C, 162-165 DEG C.The hot pressing pressure resetting corresponding the first to five district is 30.0 ~ 35.0MPa, 15.0 ~ 20.0MPa, 3.0 ~ 4.0MPa, 13.0 ~ 14.0MPa, 5.0 ~ 5.5MPa, be that 6.5 ~ 8.0s/mm carries out hot pressing to the slab after precompressed at thermal ventilation, being pressed into density is 450 ~ 650Kg/m
3sheet material;
(5) sheet material post processing: the sheet material after hot pressing is placed in constant temperature and humidity 24-36h under the indoor conditions of temperature 20 ~ 30 DEG C, humidity 55 ~ 60%, carry out sanding by the sander of 8-10 sand frame and a polishing machine carries out polishing, more namely obtain required low-density fibre panel products through sawing, on-the-spot packing.Carry out the physicochemical property test of sheet material, test result is shown in Table 1.
Embodiment 2
Repeat embodiment 1, have following difference: the 5th district's temperature is adjusted to about 170 DEG C, the pressure adjusting in the firstth district is 27.6-32.2MPa.Preparing panel density is 630-640Kg/m
3, detailed results is shown in Table 1.
Embodiment 3
Repeat embodiment 1, have following difference: third and fourth, five district's temperature increase by 4 DEG C, 4 DEG C, 6.5 DEG C respectively, the first left and right, district pressure adjusting is 28.5-33.25MPa, second, third, the 4th district's pressure is successively by+6N/cm
2,+10N/cm
2,-13N/cm
2adjust, and press accelerates 9mm/s.Preparation panel density is 640-650Kg/m
3, near-end, centre, far-end least density/averag density are respectively 87.3%, 88.6%, 87.2%.Test result is shown in Table 1.
Embodiment 4
Repeat embodiment 1, there is following difference: third and fourth, five district's temperature add 8 DEG C, 10 DEG C, 10 DEG C respectively, firstth district, the secondth district, the 3rd district, the 4th district, the 5th left and right, district force value are multiplied by 0.94,0.87,0.87,0.87,0.93 coefficient respectively and adjust, second, third, the 4th district's pressure is adjusted to 9.5N/cm respectively
2, 19N/cm
2,-15N/cm
2, press accelerates 19mm/s.Upper and lower surperficial amount of humidification increases 3.5ml/m respectively
2, 2.5ml/m
2.Panel density 633Kg/m
3.Near-end, centre, far-end least density/averag density are respectively 88.2%, 89.3%, 88.5%.Test result is shown in Table 1.
Embodiment 5
Repeat embodiment 1, there is following difference: first, second and third district's temperature adds 5 DEG C, 5 DEG C, 10 DEG C respectively, firstth district, the secondth district, the 3rd district, the 4th left and right, district force value are multiplied by 0.92,0.8,0.8,0.8 coefficient respectively and adjust, and press accelerates 25mm/s.Upper and lower surperficial amount of humidification increases 4ml/m respectively
2, 3ml/m
2.Panel density 625Kg/m
3.Near-end, centre, far-end least density/averag density are respectively 88.9%, 90.1%, 89.0%.Test result is in table 1.
Embodiment 6
Repeat embodiment 1, there is following difference: the secondth district, the 3rd district, the 4th left and right, district force value are multiplied by 0.7,0.7,0.7 coefficient respectively and adjust.Upper and lower surperficial amount of humidification increases 5ml/m respectively
2, 4ml/m
2.Panel density 618Kg/m
3.Near-end, centre, far-end least density/averag density are respectively 90.5%, 90.8%, 90.1%.Test result is shown in Table 1.
Embodiment 7
Repeat embodiment 1, there is following difference: resin added reduces 5Kg/m
3, digestion time reduces by 0.15 minute, and upper and lower surperficial amount of humidification increases 5ml/m respectively
2, 5ml/m
2.Panel density 615Kg/m
3.Near-end, centre, far-end least density/averag density are respectively 90.8%, 91.5%, 91.1%.Test result is shown in Table 1.
Embodiment 8
Repeat embodiment 1, there is following difference: resin added reduces 8Kg/m
3, digestion time reduces by 0.25 minute, and curing agent increases by 0.15%, and upper and lower surperficial amount of humidification increases 6ml/m respectively
2, 4ml/m
2.Panel density 620Kg/m
3.Near-end, centre, far-end least density/averag density are respectively 91.2%, 91.8%, 91.4%.Test result is shown in Table 1.
Table 1 low density fiberboard properties (15mm)
Claims (6)
1. a manufacture method for low density fiberboard, described manufacture method is continuous press flat-press process, it is characterized in that: through following process steps:
(1) pretreatment of steel slab surface, slab carries out humidification process when mating formation to upper and lower surface;
(2) heat pressing process, if continuous flat press first, second, third and fourth, the hot pressing temperature in 5th district be respectively 220-235 DEG C, 205-220 DEG C, 190-205 DEG C, 170-190 DEG C, 160-170 DEG C, the hot pressing pressure in corresponding the first to five district of setting is 25.0 ~ 39.0MPa, 10.0 ~ 22.0MPa, 3.0 ~ 4.0MPa, 12.0 ~ 15.0MPa, 4.5 ~ 6.0MPa, is that 6.5 ~ 8.0s/mm carries out hot pressing production to the slab after precompressed at thermal ventilation.
2. according to low density fiberboard according to claim 1, it is characterized in that: upper and lower surperficial amount of humidification is respectively 16-25ml/m
2, 14-22ml/m
2.
3. according to low density fiberboard according to claim 1, it is characterized in that: after wood material is made fiber, add 10% ~ 16% environmental protection series wood adhesive and appropriate waterproofing agent.
4. according to low density fiberboard according to claim 1, it is characterized in that: the sheet material completing hot pressing to be placed under constant indoor temperature constant humidity (temperature 15 ~ 35 DEG C and humidity 50 ~ 70%) condition after 24-48h, carry out sanding by the sander of 8-10 sand frame and a polishing machine carries out polishing.
5., according to low density fiberboard according to claim 3, it is characterized in that: described environmental protection series wood adhesive to be mol ratio be less than 1.0 E1/EO grade urea-formaldehyde resin or cyanurotriamide modified urea resin or melamine urea-formaldehyde resin in a kind of one to two or three mixing of or arbitrary proportion.
6. according to low density fiberboard according to claim 3, it is characterized in that: described waterproofing agent is one or both arbitrary proportions mixing in solid melt paraffin or emulsified wax.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510078529.XA CN104669395A (en) | 2015-02-14 | 2015-02-14 | Manufacture method of low-density fiberboard |
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|---|---|---|---|
| CN201510078529.XA CN104669395A (en) | 2015-02-14 | 2015-02-14 | Manufacture method of low-density fiberboard |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105818244A (en) * | 2016-06-13 | 2016-08-03 | 莫晨虹 | Environment-friendly light fiberboard manufacturing method |
| CN106363764A (en) * | 2016-08-27 | 2017-02-01 | 苏州雅晟建筑装饰工程有限公司 | Preparing method of waterproof fiberboard |
| CN109514685A (en) * | 2018-12-12 | 2019-03-26 | 大亚木业（茂名）有限公司 | A kind of production technology of low density fiberboard |
| CN112659304A (en) * | 2021-01-29 | 2021-04-16 | 云南省烟草公司文山州公司 | Preparation method of composite board taking flue-cured tobacco straw as raw material and board |
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| CN103753687A (en) * | 2013-12-31 | 2014-04-30 | 广西丰林木业集团股份有限公司 | Manufacturing method of light inflaming retarding fiberboard |
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| JP2004314555A (en) * | 2003-04-21 | 2004-11-11 | Matsushita Electric Works Ltd | Bleaching method of woody fiberboard |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105818244A (en) * | 2016-06-13 | 2016-08-03 | 莫晨虹 | Environment-friendly light fiberboard manufacturing method |
| CN106363764A (en) * | 2016-08-27 | 2017-02-01 | 苏州雅晟建筑装饰工程有限公司 | Preparing method of waterproof fiberboard |
| CN109514685A (en) * | 2018-12-12 | 2019-03-26 | 大亚木业（茂名）有限公司 | A kind of production technology of low density fiberboard |
| CN112659304A (en) * | 2021-01-29 | 2021-04-16 | 云南省烟草公司文山州公司 | Preparation method of composite board taking flue-cured tobacco straw as raw material and board |
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Application publication date: 20150603 |