CN106113216A - A kind of preparation method of 25mm medium density fibre board (MDF) - Google Patents

A kind of preparation method of 25mm medium density fibre board (MDF) Download PDF

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Publication number
CN106113216A
CN106113216A CN201610737931.9A CN201610737931A CN106113216A CN 106113216 A CN106113216 A CN 106113216A CN 201610737931 A CN201610737931 A CN 201610737931A CN 106113216 A CN106113216 A CN 106113216A
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CN
China
Prior art keywords
hot pressing
under conditions
mdf
medium density
grades
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.)
Pending
Application number
CN201610737931.9A
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Chinese (zh)
Inventor
利子雷
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Guangxi Ltd By Share Ltd
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Guangxi Ltd By Share Ltd
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Application filed by Guangxi Ltd By Share Ltd filed Critical Guangxi Ltd By Share Ltd
Priority to CN201610737931.9A priority Critical patent/CN106113216A/en
Publication of CN106113216A publication Critical patent/CN106113216A/en
Pending legal-status Critical Current

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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
    • B27N3/04—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
    • B27N1/00—Pretreatment of moulding material
    • 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
    • B27N3/12—Moulding of mats from fibres

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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)

Abstract

The invention discloses the preparation method of a kind of 25mm medium density fibre board (MDF), comprise the following steps: step 1: mixing, raw material combination drying is obtained the lignocellulosic mixture of moisture content 7 9%；Wherein, described raw material includes the wood fibre of 90 95 weight portions, the Lauxite of 46 weight portions, contains the bark of 26 36% in described wood fibre；Step 2: precompressed, by lignocellulosic mixture pre-molding under the conditions of 1 2MPa；Step 3: hot pressing, hot pressing is divided into nine grades of hot pressing.It is an object of the invention to propose the preparation method of a kind of 25mm medium density fibre board (MDF), the medium density fibre board (MDF) that the method prepares has preferable MOR, elastic modelling quantity.

Description

A kind of preparation method of 25mm medium density fibre board (MDF)
Technical field
The present invention relates to wood-based plate field, the preparation method of a kind of 25mm medium density fibre board (MDF).
Background technology
The MOR of wood-based plate, elastic modelling quantity are by raw-material impact, generally, and content of bark in raw material The highest, its performance is the poorest.But raw-material content of bark is the highest, and price is the lowest.
Therefore, for the angle reducing cost, the performance how improving the wood-based plate prepared by the raw material that grade is low is The problem that those skilled in the art need to consider.
Summary of the invention
It is an object of the invention to propose the preparation method of a kind of 25mm medium density fibre board (MDF), during the method prepares Density fiber board has preferable MOR, elastic modelling quantity.
The concrete technical scheme of the present invention is: the preparation method of a kind of 25mm medium density fibre board (MDF), comprises the following steps:
Step 1: mixing, obtains the lignocellulosic mixture of moisture content 7-9% by raw material combination drying；Wherein, described Raw material includes the wood fibre of 90-95 weight portion, the Lauxite of 4-6 weight portion, containing 26-36% in described wood fibre Bark；
Step 2: precompressed, by lignocellulosic mixture pre-molding under the conditions of 1-2MPa；
Step 3: hot pressing, hot pressing is divided into following steps to carry out:
S31: one-level hot pressing, 210kg/cm2Under conditions of hot pressing 8s, be then depressurized to 180kg/cm in 2s2；
S32: two grades of hot pressing, 180kg/cm2Under conditions of hot pressing 5s, be then depressurized to 70kg/cm in 1-2s2；
S33: three grades of hot pressing, 70kg/cm2Under conditions of hot pressing 3s, be then depressurized to 40kg/cm in 1s2；
S34: level Four hot pressing, 40kg/cm2Under conditions of hot pressing 1s, be then depressurized to 30kg/cm in 1s2；
S35: Pyatyi hot pressing, 30kg/cm2Under conditions of hot pressing 190s；
S36: six grades of hot pressing, 50kg/cm2Under conditions of hot pressing 20s, then boost to 110-130kg/cm in 1-3s2；
S37: seven grades of hot pressing, 110-130kg/cm2Under conditions of hot pressing 80s, be then depressurized to 40kg/cm in 2s2；
S38: eight grades of hot pressing, 40kg/cm2Under conditions of hot pressing 2s, be then depressurized to 20kg/cm in 1s2；
S39: nine grades of hot pressing, 20kg/cm2Under conditions of hot pressing 18s, hot pressing terminates and get final product；
The hot pressing temperature of S31-S39 is 180-220 DEG C.
Wood fibre in the present invention can be chosen as larch, hardwood or Eucalyptus.
In the preparation method of above-mentioned 25mm medium density fibre board (MDF), in described wood fibre, the 20 above fibers of mesh account for 30-35%；20-40 mesh fiber accounts for 20-25%；40-60 mesh fiber accounts for 20-25%；Remaining is the fiber of below 60 mesh.
In the preparation method of above-mentioned 25mm medium density fibre board (MDF), the moisture content of described 25mm medium density fibre board (MDF) is 5.5-6%.
In the preparation method of above-mentioned 25mm medium density fibre board (MDF), described Lauxite pH value is 7-8, and viscosity is being coated with 4-cup, is 20s under conditions of 25 DEG C, solid content 54-56%, hardening time 54-56s.
Compared with prior art, the beneficial effects of the present invention is:
The 25mm medium density fibre board (MDF) MOR of the present invention is 21Mpa, elastic modelling quantity 1700.
Detailed description of the invention
Below in conjunction with detailed description of the invention, technical scheme is described in further detail, but do not constitute right Any restriction of the present invention.
Embodiment 1
The preparation method of a kind of 25mm medium density fibre board (MDF), comprises the following steps:
Step 1: mixing, obtains the lignocellulosic mixture of moisture content 7-9% by raw material combination drying；Wherein, described Raw material includes the wood fibre of 90-95 weight portion, the Lauxite of 4-6 weight portion, containing 26-36% in described wood fibre Bark；In described wood fibre, the 20 above fibers of mesh account for 30-35%；20-40 mesh fiber accounts for 20-25%；40-60 mesh fiber Accounting for 20-25%, this wood fibre is larch；Remaining is the fiber of below 60 mesh, and described Lauxite pH value is 7.5, Viscosity be coated with 4-cup, be 20s under conditions of 25 DEG C, solid content 55%, hardening time 55s.
Step 2: precompressed, by lignocellulosic mixture pre-molding under the conditions of 2MPa；
Step 3: hot pressing, hot pressing is divided into following steps to carry out:
S31: one-level hot pressing, 210kg/cm2Under conditions of hot pressing 8s, be then depressurized to 180kg/cm in 2s2；
S32: two grades of hot pressing, 180kg/cm2Under conditions of hot pressing 5s, be then depressurized to 70kg/cm in 1-2s2；
S33: three grades of hot pressing, 70kg/cm2Under conditions of hot pressing 3s, be then depressurized to 40kg/cm in 1s2；
S34: level Four hot pressing, 40kg/cm2Under conditions of hot pressing 1s, be then depressurized to 30kg/cm in 1s2；
S35: Pyatyi hot pressing, 30kg/cm2Under conditions of hot pressing 190s；
S36: six grades of hot pressing, 50kg/cm2Under conditions of hot pressing 20s, then boost to 110-130kg/cm in 1-3s2；
S37: seven grades of hot pressing, 110-130kg/cm2Under conditions of hot pressing 80s, be then depressurized to 40kg/cm in 2s2；
S38: eight grades of hot pressing, 40kg/cm2Under conditions of hot pressing 2s, be then depressurized to 20kg/cm in 1s2；
S39: nine grades of hot pressing, 20kg/cm2Under conditions of hot pressing 18s, hot pressing terminates and get final product；
The hot pressing temperature of S31-S39 is 210 DEG C.
The moisture content of described 25mm medium density fibre board (MDF) is 5.8%.
Comparative example 1
Raw material composition is substantially the same with embodiment 1, and different places is, the wood fibre in raw material does not contains bark, heat Pressure technique is different, under the conditions of the heat pressing process of this comparative example is 210 DEG C, and hot pressing 7min under conditions of 3.5Mpa.
Comparative example 2
Raw material composition is same as in Example 1, and different places is, heat pressing process is different, the heat pressing process of this comparative example Under the conditions of being 210 DEG C, hot pressing 7min under conditions of 3.5Mpa.
The 25mm medium density fibre board (MDF) MOR in the dry state of the present embodiment is 21Mpa, elastic modelling quantity 1700；
The 25mm medium density fibre board (MDF) MOR in the dry state of comparative example 1 is 21Mpa, elastic modelling quantity 1800；
The 25mm medium density fibre board (MDF) MOR in the dry state of comparative example 2 is 16Mpa, elastic modelling quantity 2100；
Under drying regime, MOR, elastic modelling quantity detection method are with reference to GB/T11718-2009.
Above-described be only presently preferred embodiments of the present invention, all made in the range of the spirit and principles in the present invention appoint What amendment, equivalent and improvement etc., should be included within the scope of the present invention.

Claims (4)

1. the preparation method of a 25mm medium density fibre board (MDF), it is characterised in that comprise the following steps:
Step 1: mixing, obtains the lignocellulosic mixture of moisture content 7-9% by raw material combination drying；Wherein, described raw material Including wood fibre, the Lauxite of 4-6 weight portion of 90-95 weight portion, described wood fibre contains the tree of 26-36% Skin；
Step 2: precompressed, by lignocellulosic mixture pre-molding under the conditions of 1-2MPa；
Step 3: hot pressing, hot pressing is divided into following steps to carry out:
S31: one-level hot pressing, 210kg/cm2Under conditions of hot pressing 8s, be then depressurized to 180kg/cm in 2s2；
S32: two grades of hot pressing, 180kg/cm2Under conditions of hot pressing 5s, be then depressurized to 70kg/cm in 1-2s2；
S33: three grades of hot pressing, 70kg/cm2Under conditions of hot pressing 3s, be then depressurized to 40kg/cm in 1s2；
S34: level Four hot pressing, 40kg/cm2Under conditions of hot pressing 1s, be then depressurized to 30kg/cm in 1s2；
S35: Pyatyi hot pressing, 30kg/cm2Under conditions of hot pressing 190s；
S36: six grades of hot pressing, 50kg/cm2Under conditions of hot pressing 20s, then boost to 110-130kg/cm in 1-3s2；
S37: seven grades of hot pressing, 110-130kg/cm2Under conditions of hot pressing 80s, be then depressurized to 40kg/cm in 2s2；
S38: eight grades of hot pressing, 40kg/cm2Under conditions of hot pressing 2s, be then depressurized to 20kg/cm in 1s2；
S39: nine grades of hot pressing, 20kg/cm2Under conditions of hot pressing 18s, hot pressing terminates and get final product；
The hot pressing temperature of S31-S39 is 180-220 DEG C.
The preparation method of 25mm medium density fibre board (MDF) the most according to claim 1, it is characterised in that described wood fibre In the 20 above fibers of mesh account for 30-35%；20-40 mesh fiber accounts for 20-25%；40-60 mesh fiber accounts for 20-25%；Remaining is 60 Fiber below mesh.
The preparation method of 25mm medium density fibre board (MDF) the most according to claim 2, it is characterised in that close in described 25mm The moisture content of degree fibre board is 5.5-6%.
The preparation method of 25mm medium density fibre board (MDF) the most according to claim 1, it is characterised in that described Lauxite PH value is 7-8, viscosity be coated with 4-cup, be 20s under conditions of 25 DEG C, solid content 54-56%, hardening time 54-56s.
CN201610737931.9A 2016-08-26 2016-08-26 A kind of preparation method of 25mm medium density fibre board (MDF) Pending CN106113216A (en)

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CN201610737931.9A CN106113216A (en) 2016-08-26 2016-08-26 A kind of preparation method of 25mm medium density fibre board (MDF)

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Application Number Priority Date Filing Date Title
CN201610737931.9A CN106113216A (en) 2016-08-26 2016-08-26 A kind of preparation method of 25mm medium density fibre board (MDF)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1044113A (en) * 1996-05-31 1998-02-17 Yamaha Corp Manufacture of ligneous board
DE19632997A1 (en) * 1996-08-16 1998-02-19 Siempelkamp Gmbh & Co Parallel sided timber strands for use in manufacture of composite beams
JPH10119014A (en) * 1996-10-16 1998-05-12 Kanegafuchi Chem Ind Co Ltd Manufacture of fiber board
CN1425541A (en) * 2001-12-14 2003-06-25 株式会社瑞可 Medium density flame-retardant fibrous plate and its producing method
CN1947976A (en) * 2006-10-30 2007-04-18 叶吉明 Hot pressing technique for producing medium density fibreboard
CN102001121A (en) * 2010-10-20 2011-04-06 饶显生 Method for producing bark mixed medium-density fiber plate
CN102407553A (en) * 2010-09-21 2012-04-11 大亚科技股份有限公司 Manufacturing method of high density fiberboard for whitened type E1 grade floor substrate
CN105349093A (en) * 2015-12-25 2016-02-24 广西丰林木业集团股份有限公司 Soybean meal-based adhesive for fiber boards and synthetic method

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1044113A (en) * 1996-05-31 1998-02-17 Yamaha Corp Manufacture of ligneous board
DE19632997A1 (en) * 1996-08-16 1998-02-19 Siempelkamp Gmbh & Co Parallel sided timber strands for use in manufacture of composite beams
JPH10119014A (en) * 1996-10-16 1998-05-12 Kanegafuchi Chem Ind Co Ltd Manufacture of fiber board
CN1425541A (en) * 2001-12-14 2003-06-25 株式会社瑞可 Medium density flame-retardant fibrous plate and its producing method
CN1947976A (en) * 2006-10-30 2007-04-18 叶吉明 Hot pressing technique for producing medium density fibreboard
CN102407553A (en) * 2010-09-21 2012-04-11 大亚科技股份有限公司 Manufacturing method of high density fiberboard for whitened type E1 grade floor substrate
CN102001121A (en) * 2010-10-20 2011-04-06 饶显生 Method for producing bark mixed medium-density fiber plate
CN105349093A (en) * 2015-12-25 2016-02-24 广西丰林木业集团股份有限公司 Soybean meal-based adhesive for fiber boards and synthetic method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李绍昆等: "《中密度纤维板多层热压机的热压过程分析》", 《中国人造板》 *

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Application publication date: 20161116