AU2020103146A4 - An ultrathin medium density fibreboard with mildew proof and antibacterial function and a preparation method thereof - Google Patents
An ultrathin medium density fibreboard with mildew proof and antibacterial function and a preparation method thereof Download PDFInfo
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- AU2020103146A4 AU2020103146A4 AU2020103146A AU2020103146A AU2020103146A4 AU 2020103146 A4 AU2020103146 A4 AU 2020103146A4 AU 2020103146 A AU2020103146 A AU 2020103146A AU 2020103146 A AU2020103146 A AU 2020103146A AU 2020103146 A4 AU2020103146 A4 AU 2020103146A4
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- parts
- medium density
- antibacterial function
- mildew proof
- preparation
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Links
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 230000000845 anti-microbial effect Effects 0.000 claims abstract description 31
- 239000003755 preservative agent Substances 0.000 claims abstract description 31
- 230000002335 preservative effect Effects 0.000 claims abstract description 31
- 229920002522 Wood fibre Polymers 0.000 claims abstract description 27
- 239000000839 emulsion Substances 0.000 claims abstract description 18
- 229920002635 polyurethane Polymers 0.000 claims abstract description 18
- 239000004814 polyurethane Substances 0.000 claims abstract description 18
- CAQWNKXTMBFBGI-UHFFFAOYSA-N C.[Na] Chemical compound C.[Na] CAQWNKXTMBFBGI-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 16
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 16
- 239000007822 coupling agent Substances 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 238000002791 soaking Methods 0.000 claims abstract description 13
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 238000007731 hot pressing Methods 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 20
- 239000002025 wood fiber Substances 0.000 claims description 18
- 235000006679 Mentha X verticillata Nutrition 0.000 claims description 16
- 235000002899 Mentha suaveolens Nutrition 0.000 claims description 16
- 235000001636 Mentha x rotundifolia Nutrition 0.000 claims description 16
- 229960000686 benzalkonium chloride Drugs 0.000 claims description 16
- CADWTSSKOVRVJC-UHFFFAOYSA-N benzyl(dimethyl)azanium;chloride Chemical compound [Cl-].C[NH+](C)CC1=CC=CC=C1 CADWTSSKOVRVJC-UHFFFAOYSA-N 0.000 claims description 16
- 239000011094 fiberboard Substances 0.000 claims description 15
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 15
- ZXDDPOHVAMWLBH-UHFFFAOYSA-N 2,4-Dihydroxybenzophenone Chemical compound OC1=CC(O)=CC=C1C(=O)C1=CC=CC=C1 ZXDDPOHVAMWLBH-UHFFFAOYSA-N 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 10
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 claims description 7
- 238000004108 freeze drying Methods 0.000 claims description 3
- 239000002023 wood Substances 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 238000012545 processing Methods 0.000 abstract description 2
- 238000009777 vacuum freeze-drying Methods 0.000 abstract 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 48
- 230000000052 comparative effect Effects 0.000 description 17
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 14
- 229920005989 resin Polymers 0.000 description 14
- 239000011347 resin Substances 0.000 description 14
- 239000000835 fiber Substances 0.000 description 10
- 239000000523 sample Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 5
- 239000012965 benzophenone Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000013068 control sample Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000013642 negative control Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 241000222120 Candida <Saccharomycetales> Species 0.000 description 1
- 241000588722 Escherichia Species 0.000 description 1
- 241000191940 Staphylococcus Species 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- -1 glycidoxypropyl Chemical group 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- B27N1/02—Mixing the material with binding agent
- B27N1/0209—Methods, e.g. characterised by the composition of the agent
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N33/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic nitrogen compounds
- A01N33/02—Amines; Quaternary ammonium compounds
- A01N33/12—Quaternary ammonium compounds
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N35/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having two bonds to hetero atoms with at the most one bond to halogen, e.g. aldehyde radical
- A01N35/04—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having two bonds to hetero atoms with at the most one bond to halogen, e.g. aldehyde radical containing aldehyde or keto groups, or thio analogues thereof, directly attached to an aromatic ring system, e.g. acetophenone; Derivatives thereof, e.g. acetals
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- A01N59/16—Heavy metals; Compounds thereof
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
- A01N65/08—Magnoliopsida [dicotyledons]
- A01N65/22—Lamiaceae or Labiatae [Mint family], e.g. thyme, rosemary, skullcap, selfheal, lavender, perilla, pennyroyal, peppermint or spearmint
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
- E04C2/16—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of fibres, chips, vegetable stems, or the like
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention discloses an ultrathin medium density fibreboard with mildew proof
and antibacterial function and a preparation method thereof, belonging to the field of wood
based panel preparation. The material of the medium density fibreboard comprises wood fibre,
phenol-formaldehyde resin, coupling agent, polyurethane emulsion, methyl sodium silicate and
antimicrobial preservative. The preparation method is as follows. Soaking the crushed wood
fibres in acetum, and then processing them with vacuum freeze-drying technique. Mixing the
freeze-dried wood fibres with antimicrobial preservative, 1/2 phenol-formaldehyde resin and
coupling agent, and then adding polyurethane emulsion, methyl sodium silicate and residual
1/2 phenol-formaldehyde resin and stirring them together to obtain the billet. The ultrathin
medium density fibreboard with mildew proof and antibacterial function can be obtained by
hot pressing the billet. The medium density fibreboard of the invention has excellent
mechanical properties, good antibacterial and mildew proof effect, simple preparation method
and wide industrial popularization value.
Description
PATENTS ACT 1990
An ultrathin medium density fibreboard with mildew proof and antibacterial
function and a preparation method thereof
The invention is described in the following statement:-
An ultrathin medium density fibreboard with mildew proof and antibacterial
function and a preparation method thereof
The invention relates to technical field of wood-based panel processing, specifically
involving an ultrathin medium density fibreboard with mildew proof
and antibacterial function and a preparation method thereof.
Density board, fully known as medium density fiberboard, is a kind of sheet material,
which is taking wood fiber or other plant fibers as raw materials and prepared by fiber,
applied with synthetic resin, and pressed under heating and pressure. With high
production resources utilization rate, the medium density fiberboard has fine product
material, stable performance and close edge. Moreover, it is easy to process and can make
full use of forest residues, inferior small fuel wood and other resources to develop wood
based panel to replace large diameter wood products. In recent years, with the rapid
increase of the output of medium density fiberboard, the share of the wood-based panel
product structure is also increasing.
At present, in the production of the density board on the market, the raw material fiber is
directly crushed by the crusher and then paved on the planking machine. Each layer is
paved, a layer of urea formaldehyde resin is sprayed on it, and then they are bonded to a
thick board after several cycles. The thickness of such a board is at least 5 mm, otherwise
it cannot be formed. Moreover, the cost is very high, and a large number of adhesives will
produce a large amount of formaldehyde. In addition, the existing density boards with thickness above 5 mm can only be used for home decoration for its limited scope of use.
The board is heavy and not easy to carry. In addition, there is no essential difference
between the medium density fiberboard and the particleboard in the market because the
problems such as tooth burst, and board cracking are easy to occur when cutting. Because
the density board is composed of synthetic resin and fiber, it is easy to absorb water and
cause mildew, which affects its beauty and strength and shortens its service life.
Therefore, it is of great practical significance to provide a kind of ultra-thin density board
with excellent anti mildew, antibacterial and mechanical properties for the application
and promotion of density board.
The purpose of the invention is to provide an ultrathin medium density fibreboard with
mildew proof and antibacterial function and a preparation method thereof, so as to solve
the problems existing in the prior art, and make the medium density fibreboard have
excellent mechanical properties, good antibacterial and mildew proof effect.
To achieve the above purpose, the invention provides the following scheme:
The invention provides a medium density fibreboard with mildew proof
and antibacterial function, and by weight, its raw materials include 50-60 parts of wood
fibre, 25-30 parts of phenol-formaldehyde resin, 1-1.2 parts of coupling agent, 13-22
parts of polyurethane emulsion. 3.8-4.7 parts of methyl sodium silicate and 3.5-4.2 parts
of antimicrobial preservative.
Wherein, the antimicrobial preservative is the mixture of benzalkonium chloride, mint
oil, nano titanium dioxide and 2,4-dihydroxy benzophenone in mass ratio of (3-5) to (1-2)
to (1-1.2) to 1.
Further, the coupling agent is y- (2,3-glycidoxypropyl) propyltrimethoxysilane.
Further, the thickness of medium density fibreboard is 3-5mm.
Further, by weight, its raw materials include following components: 50 parts of wood
fibre, 30 parts of phenol-formaldehyde resin, 1.1 parts of coupling agent, 20 parts of
polyurethane emulsion. 4.5 parts of methyl sodium silicate and 3.5 parts of antimicrobial
preservative.
Wherein, the antimicrobial preservative is the mixture of benzalkonium chloride, mint
oil, nano titanium dioxide and 2,4-dihydroxy benzophenone in mass ratio of 3 to 1 to 1 to
1.
The invention also provides a preparation method of ultrathin medium density fiberboard
with mildew proof and antibacterial function, including following steps:
(1) Mixing benzalkonium chloride, mint oil, nano titanium dioxide and 2,4-dihydroxy
benzophenone evenly in a certain mass to get antimicrobial preservative.
(2) Crushing wood fibers and soaking them in acetum for 5-6h. After soaking, the wood
fibers are freeze-dried to a moisture content of 18-20%.
(3) Mixing the freeze-dried wood fibers with antimicrobial preservative, 1/2 phenol
formaldehyde resin and coupling agent for 5-8min to obtain a mixture.
(4) Adding polyurethane emulsion, methyl sodium silicate and residual 1/2 phenol
formaldehyde resin to the mixture. Stirring it for 3-5min to obtain the billet.
(5) The medium density fiberboard with mildew proof and antibacterial function can be
obtained by hot pressing the billet.
Further, in step (1), the freeze-drying temperature is -40 'C to -38 'C.
Further, the hot-pressing treatment in step (5) comprises the following steps.
Under the pressure condition, the temperature is raised to 180-200 °C at the speed of 0.5
1 °C/min and kept for 30-35min. Then the temperature is heated to 245-255 °C at the
speed of 3.5-3.8 °C/min and kept for 20-25min.
Further, the pressure condition is 45-47 MPa.
The invention discloses the following technical effects.
In the invention, the wood fiber is crushed, soaked in acetum, and then subjected to
freeze-drying treatment, so as to enhance the strength of the wood fiber and give the
wood fiber higher porosity.
Adding a small amount of mint oil into the antimicrobial preservative can enhance the
bactericidal and mildew proof properties of nano titanium dioxide.
The synergistic effect of benzalkonium chloride and 2,4-dihydroxy benzophenone can not
only absorb ultraviolet rays to improve the bactericidal ability, but also achieve long-term
sterilization and mildew prevention effect.
Under the action of phenol-formaldehyde resin and coupling agent y- (2,3
glycidoxypropyl) propyltrimethoxysilane, the antimicrobial preservative can enter into
the micro pores of wood fiber, and then give full play to the strong bactericidal and
mildew proof effect.
Polyurethane emulsion can also enhance the bonding effect of phenol-formaldehyde resin
to make the density plate stronger and much denser. Moreover, it can make the density
board more effective while reducing the thickness of density plate.
The medium density fibreboard of the invention has excellent mechanical properties,
good antibacterial and mildew proof effect, and simple preparation method. With a thickness of 3-5mm, it can meet the high requirements of plate thickness, and has a wide industrial popularization value.
The various exemplary embodiments of the invention will be described in detail. The
detailed description shall not be considered as a limitation of the invention, but rather be
understood as a more detailed description of some aspects, characteristics and
embodiments of the invention.
It should be noted that the terms described in the present invention are only for describing
particular embodiments and are not intended to limit the invention. In addition, for the
numerical range in the present invention, it should be understood that each intermediate
value between the upper and lower limits of the range is also specifically disclosed. Each
smaller range between any stated value or intermediate value within the stated range and
any other stated value or intermediate value within said range is also included in the
present invention. The upper and lower limits of these smaller ranges can be included or
excluded independently.
Unless otherwise indicated, all technical and scientific terms used herein have the same
meaning as those of ordinary skill in the art of the invention. Although only preferred
methods and materials are described, any method and material similar or equivalent to
those described herein may be used in the implementation or testing of the invention. All
references referred to in this specification are incorporated by reference to disclose and
describe methods and/or materials related to the literature. In case of conflict with any
incorporated literature, the contents of this specification shall prevail.
Without departing from the scope or spirit of the invention, various improvements and
changes can be made to the specific embodiment of the specification of the invention,
which is obvious to those skilled in the art. It is obvious to the technical personnel that
other embodiments can be obtained through the specification of the present invention.
The description and embodiment of the application are only exemplary.
The terms "embodying", "including", "having", "containing" and so on, used in this
application are all open terms, which means including but not limited to.
Unless otherwise specified, the "parts" mentioned in the present invention are calculated
according to the mass fraction.
Embodiment 1
By weight, the raw materials of the medium density fibreboard with mildew proof
and antibacterial function include 50 parts of wood fibre, 30 parts of phenol
formaldehyde resin, 1.1 parts of y- (2,3-glycidoxypropyl) propyltrimethoxysilane, 20
parts of polyurethane emulsion, 4.5 parts of methyl sodium silicate and 3.5 parts of
antimicrobial preservative.
Wherein, the antimicrobial preservative is the mixture of benzalkonium chloride, mint
oil, nano titanium dioxide and 2,4-dihydroxy benzophenone in mass ratio of 3 to 1 to 1 to
1.
The preparation of it is as follows:
(1) Mixing benzalkonium chloride, mint oil, nano titanium dioxide and 2,4-dihydroxy
benzophenone evenly in a certain mass to get antimicrobial preservative.
(2) Crushing wood fibers and soaking them in acetum for 5h. After soaking, the wood
fibers are freeze-dried at -38C to a moisture content of 18%.
(3) Mixing the freeze-dried wood fibers with antimicrobial preservative, 1/2 phenol
formaldehyde resin and coupling agent for 8min to obtain a mixture.
(4) Adding polyurethane emulsion, methyl sodium silicate and residual 1/2 phenol
formaldehyde resin to the mixture. Stirring it for 4min to obtain the billet.
(5) Heating the billet to 200 °C at the speed of 0.8 °C/min at 45MPa and keeping the
temperature for 32min. Then the temperature is heated to 250 °C at the speed of 3.8 °C
/min and kept for 25min. After cooling it naturally, an ultrathin medium density
fiberboard with thickness of 4mm can be obtained.
Embodiment 2
By weight, the raw materials of the medium density fibreboard with mildew proof
and antibacterial function include 60 parts of wood fibre, 25 parts of phenol
formaldehyde resin, 1 part of y- (2,3-glycidoxypropyl) propyltrimethoxysilane, 22 parts
of polyurethane emulsion, 3.8 parts of methyl sodium silicate and 4.2 parts of
antimicrobialpreservative.
Wherein, the antimicrobial preservative is the mixture of benzalkonium chloride, mint
oil, nano titanium dioxide and 2,4-dihydroxy benzophenone in mass ratio of 4 to 2 to 1.2
to 1.
The preparation of it is as follows:
(1) Mixing benzalkonium chloride, mint oil, nano titanium dioxide and 2,4-dihydroxy
benzophenone evenly in a certain mass to get antimicrobial preservative.
(2) Crushing wood fibers and soaking them in acetum for 6h. After soaking, the wood
fibers are freeze-dried at -40'C to a moisture content of 19%.
(3) Mixing the freeze-dried wood fibers with antimicrobial preservative, 1/2 phenol
formaldehyde resin and coupling agent for 6min to obtain a mixture.
(4) Adding polyurethane emulsion, methyl sodium silicate and residual 1/2 phenol
formaldehyde resin to the mixture. Stirring it for 3min to obtain the billet.
(5) Heating the billet to 180 °C at the speed of 1I C/min at 46MPa and keeping the
temperature for 35min. Then the temperature is heated to 255 °C at the speed of 3.6 °C
/min and kept for 23min. After cooling it naturally, an ultrathin medium density
fiberboard with thickness of 3mm can be obtained.
Embodiment 3
By weight, the raw materials of the medium density fibreboard with mildew proof
and antibacterial function include 55 parts of wood fibre, 28 parts of phenol
formaldehyde resin, 1.2 parts of y- (2,3-glycidoxypropyl) propyltrimethoxysilane, 13
parts of polyurethane emulsion, 4 parts of methyl sodium silicate and 3.8 parts of
antimicrobial preservative.
Wherein, the antimicrobial preservative is the mixture of benzalkonium chloride, mint
oil, nano titanium dioxide and 2,4-dihydroxy benzophenone in mass ratio of 5 to 2 to 1.1
to 1.
The preparation of it is as follows:
(1) Mixing benzalkonium chloride, mint oil, nano titanium dioxide and 2,4-dihydroxy
benzophenone evenly in a certain mass to get antimicrobial preservative.
(2) Crushing wood fibers and soaking them in acetum for 5h. After soaking, the wood
fibers are freeze-dried at -39C to a moisture content of 20%.
(3) Mixing the freeze-dried wood fibers with antimicrobial preservative, 1/2 phenol
formaldehyde resin and coupling agent for 5min to obtain a mixture.
(4) Adding polyurethane emulsion, methyl sodium silicate and residual 1/2 phenol
formaldehyde resin to the mixture. Stirring it for 5min to obtain the billet.
(5) Heating the billet to 190 °C at the speed of 0.5 °C/min at 47MPa and keeping the
temperature for 30min. Then the temperature is heated to 245 °C at the speed of 3.5 °C
/min and kept for 20min. After cooling it naturally, an ultrathin medium density
fiberboard with thickness of 5mm can be obtained.
Embodiment 4
By weight, the raw materials of the medium density fibreboard with mildew proof
and antibacterial function include 58 parts of wood fibre, 26 parts of phenol
formaldehyde resin, 1.1 part of y- (2,3-glycidoxypropyl) propyltrimethoxysilane, 17 parts
of polyurethane emulsion, 4.7 parts of methyl sodium silicate and 4 parts of antimicrobial
preservative.
Wherein, the antimicrobial preservative is the mixture of benzalkonium chloride, mint
oil, nano titanium dioxide and 2,4-dihydroxy benzophenone in mass ratio of 3 to 1.5 to 1
to 1.
The preparation of it is as follows:
(1) Mixing benzalkonium chloride, mint oil, nano titanium dioxide and 2,4-dihydroxy
benzophenone evenly in a certain mass to get antimicrobial preservative.
(2) Crushing wood fibers and soaking them in acetum for 6h. After soaking, the wood
fibers are freeze-dried at -38C to a moisture content of 19%.
(3) Mixing the freeze-dried wood fibers with antimicrobial preservative, 1/2 phenol
formaldehyde resin and coupling agent for 7min to obtain a mixture.
(4) Adding polyurethane emulsion, methyl sodium silicate and residual 1/2 phenol
formaldehyde resin to the mixture. Stirring it for 4min to obtain the billet.
(5) Heating the billet to 185 °C at the speed of 0.6 °C/min at 46MPa and keeping the
temperature for 33min. Then the temperature is heated to 253 °C at the speed of 3.7 °C
/min and kept for 22min. After cooling it naturally, an ultrathin medium density
fiberboard with thickness of 4mm can be obtained.
Comparative Embodiment 1
Unlike embodiment 1, 2,4-dihydroxy benzophenone is not added.
Comparative Embodiment 2
Unlike embodiment 1, benzalkonium chloride is not added.
Comparative Embodiment 3
Unlike embodiment 1, mint oil is not added.
Comparative Embodiment 4
Unlike embodiment 1, polyurethane emulsion is not added.
1)Antibacterial and mildew proof properties determination of ultra-thin density board in
the invention according to ASTMG21-96 test method
Sample description: The test sample is the medium density fibreboard with mildew proof
and antibacterial function of the invention, and the control sample is standard PE plastic;
the size of both the test sample and the control sample is 50 mm x 50 mm.
Detection criterion: JISZ2801:2000 Detection and evaluation of antibacterialproperties
of antibacterialproducts
See Table 1 for the antibacterial rate of embodiments 1-4 and comparative
embodiments1-4.
Table 1
Antibacterial Rate Escherichia Staphylococcus P.Aeruginosa Candida coli aureus Albicans Embodiment 1 >99.7 >99.6 >99.3 >99.2 Embodiment 2 >99.7 >99.5 >99.2 >99.3 Embodiment 3 >99.6 >99.5 >99.2 >99.2 Embodiment 4 >99.7 >99.6 >99.2 >99.1 Comparative >78.6 >78.4 >78.3 >65.3 embodiment Comparative >79.0 >78.6 >78.4 >65.6 embodiment2 Comparative >78.8 >78.4 >78.4 >65.6 embodiment3 Comparative >79.1 >78.6 >78.5 >65.9 embodiment4
2) Test of mildew proof property
Sample description: The test sample is the medium density fibreboard with mildew proof
and antibacterial function of the invention with a size of 50 mm x 50 mm. Using a 25 mm
x 25 mm filter paper as negative control.
Detection criterion: ASTMG21-96(2002) Determination offungal resistance ofsynthetic
polymer materials
See Table 2 for the test result of mildew proof property. Table 2
Sample Mildew grade Mildew area Negative control (14 days) Grade 4 90% Embodiment 1(28 days) Grade 0 0% Embodiment 2 (28 days) Grade 0 0% Embodiment 3 (28 days) Grade 0 0% Embodiment 4 (28 days) Grade 0 0%
Comparative embodiment (28 days) Grade 1 8% Comparative embodiment2 (28 days) Grade 2 15% Comparative embodiment3 (28 days) Grade 1 6% Comparative embodiment4 (28 days) Grade 1 5% Note: observe the degree of mildew growth after culture according to the standard and
identify and grade according to the following standards.
No growth (Observation under microscope50x) -Grade 0
Trace growth (< 10%) -Grade 1
Mild growth (> 10 - < 30%) -Grade 2
Moderate growth (> 30 - < 60%) -Grade 3
Severe growth (> 60 - full coverage) -Grade 4
The formaldehyde content and mechanical properties of the ultra-thin density board in the
invention are shown in Table 3.
Table 3
Embodi Embodi Embodi Comparative Comparative Comparative Comparative Embodi meant 3 meant 4 embodiment embodiment embodiment embodiment meant I meant 2 1 2 3 4 rmaldehyde Not Not Not Not Not Not Not Not content detecte detecte detecte detecte detected detected detected detected mg/100g) d d d d Stress
[olerance 75 74 74 75 68 68 69 55 2) (kN/cm _ II _I_ I The above is only a better embodiment of the invention and does not limit the invention.
Any modification, equivalent replacement and improvement made within the spirit and
principle of the invention shall be included in the protection scope of the invention.
Claims (8)
1.A medium density fibreboard with mildew proof and antibacterial function is
characterized in that by weight, its raw materials include 50-60 parts of wood fibre, 25-30
parts of phenol-formaldehyde resin, 1-1.2 parts of coupling agent, 13-22 parts of
polyurethane emulsion. 3.8-4.7 parts of methyl sodium silicate and 3.5-4.2 parts of
antimicrobial preservative.
Wherein, the antimicrobial preservative is the mixture of benzalkonium chloride, mint
oil, nano titanium dioxide and 2,4-dihydroxy benzophenone in mass ratio of (3-5) to (1-2)
to (1-1.2) to 1.
2. The medium density fibreboard with mildew proof and antibacterial function according
to claim 1 is characterized in that the coupling agent is y- (2,3-glycidoxypropyl)
propyltrimethoxysilane.
3. The medium density fibreboard with mildew proof and antibacterial function according
to claim 1 is characterized in that its thickness is 3-5mm.
4. The medium density fibreboard with mildew proof and antibacterial function according
to claim 1 is characterized in that by weight, its raw materials include following
components: 50 parts of wood fibre, 30 parts of phenol-formaldehyde resin, 1.1 parts of
coupling agent, 20 parts of polyurethane emulsion. 4.5 parts of methyl sodium silicate
and 3.5 parts of antimicrobial preservative.
Wherein, the antimicrobial preservative is the mixture of benzalkonium chloride, mint
oil, nano titanium dioxide and 2,4-dihydroxy benzophenone in mass ratio of 3 to 1 to 1 to
1.
5. The preparation method of ultrathin medium density fiberboard with mildew proof
and antibacterial function according to any one of claims 1-4, is characterized by
including following steps:
(1) Mixing benzalkonium chloride, mint oil, nano titanium dioxide and 2,4-dihydroxy
benzophenone evenly in a certain mass to get antimicrobial preservative.
(2) Crushing wood fibers and soaking them in acetum for 5-6h. After soaking, the wood
fibers are freeze-dried to a moisture content of 18-20%.
(3) Mixing the freeze-dried wood fibers with antimicrobial preservative, 1/2 phenol
formaldehyde resin and coupling agent for 5-8min to obtain a mixture.
(4) Adding polyurethane emulsion, methyl sodium silicate and residual 1/2 phenol
formaldehyde resin to the mixture. Stirring it for 3-5min to obtain the billet.
(5)The medium density fiberboard with mildew proof and antibacterial function can be
obtained by hot pressing the billet.
6. The preparation method of medium density fiberboard with mildew proof
and antibacterial function according to claim 5, is characterized in that in step (1), the
freeze-drying temperature is -40 °C to -38 °C.
7. The preparation method of medium density fiberboard with mildew proof
and antibacterial function according to claim 5, is characterized in that the hot-pressing
treatment in step (5) comprises the following steps.
Under the pressure condition, the temperature is raised to 180-200 °C at the speed of 0.5
1 °C/min and kept for 30-35min. Then the temperature is heated to 245-255 °C at the
speed of 3.5-3.8 °C/min and kept for 20-25min.
8. The preparation method of medium density fiberboard with mildew proof
and antibacterial function according to claim 7, is characterized in that the pressure
condition is 45-47 MPa.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113291022A (en) * | 2021-04-09 | 2021-08-24 | 佳诺威集团股份有限公司 | Cabinet routing plate and manufacturing method |
| CN113829454A (en) * | 2021-10-18 | 2021-12-24 | 福建省碧诚工贸有限公司 | Processing technology of anti-corrosion and anti-mildew plate |
-
2020
- 2020-10-30 AU AU2020103146A patent/AU2020103146A4/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113291022A (en) * | 2021-04-09 | 2021-08-24 | 佳诺威集团股份有限公司 | Cabinet routing plate and manufacturing method |
| CN113829454A (en) * | 2021-10-18 | 2021-12-24 | 福建省碧诚工贸有限公司 | Processing technology of anti-corrosion and anti-mildew plate |
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