CN103934878B - Medium density fibre board (MDF) and manufacture method thereof and purposes - Google Patents
Medium density fibre board (MDF) and manufacture method thereof and purposes Download PDFInfo
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Abstract
The present invention relates to medium density fibre board (MDF) and manufacture method thereof and purposes, belong to wood-based plate and manufacture field. The manufacture method of medium density fibre board (MDF) of the present invention, comprises the steps: the preparation of a, lignocellulosic mixture: phenoweld and paraffin sprayed on wood fibre, and dry, obtain lignocellulosic mixture; B, precompressed: under 0.5～2Mpa, suppress; C, hot pressing: in 4～8Mpa compacting, then in 0.5～2.0MPa compacting, obtain the medium density fibre board (MDF) of moisture content lower than 6wt%; Wherein, hot pressing temperature is controlled at 180～220 DEG C; D, plated film: on PVC film, be coated with EVA resin PUR, on the medium density fibre board (MDF) that then its mount obtains in c step, obtain medium density fibre board (MDF) of the present invention. Medium density fibre board (MDF) of the present invention, has the advantages such as intensity is high, good toughness, good waterproof performance, can be applicable to industrial products packaging above, is especially suitable for the packaging of cold rolling coil and cold-reduced sheet.
Description
Technical field
The present invention relates to medium density fibre board (MDF) and manufacture method thereof and purposes, belong to wood-based plate and manufacture field.
Background technology
Along with increasing continuously and healthily of China's cold-rolled steel coils output and constantly carrying of each big steel enterprise product quality and brand awarenessHeight, last procedure of producing as cold rolling coil---no matter cold coiling (plate) packaging is its logistics mode or technology of the packageAll more and more paid attention to.
Existing steel roll package material is divided into conventionally: polybag, thick plastic plate, polybag and medium density fibre board (MDF) etc. with bubble.Unquestionable, plastics packed not recuperability makes it not have a feature of environmental protection; Meanwhile, existing medium density fibre board (MDF) is due to intensityWith the problem of toughness, its specification can only reach 2440*1830mm conventionally, if for large-sized steel roll package, and need be byMultiple medium density fibre board (MDF)s are spliced, but board material splice can make its aesthetics, intensity, water resistance obviously reduce, because ofThis, find a kind of manufacture method that can production large scale medium density fibre board (MDF), particularly important.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of medium density fibre board (MDF) and manufacture method and purposes.
The manufacture method of medium density fibre board (MDF) of the present invention, comprises the steps:
The preparation of a, lignocellulosic mixture: get 93～97 weight portion raw material wood fibers, by the modified phenolic of 3～5 weight portionsThe paraffin of resin binder and 0～2 weight portion sprays on wood fibre, and dry, obtaining water content is the wooden fibre of 8～10wt%Dimension mixture; Wherein, described raw material wood fiber moisture content is 75～85wt%;
B, precompressed: the lignocellulosic mixture that a step is obtained is suppressed under 0.5～2Mpa, obtain precompressed slab;
C, hot pressing: precompressed slab is suppressed 30～60 seconds under 4～8Mpa, then under 0.5～2.0MPa, suppressed 20～40 seconds,Obtain the medium density fibre board (MDF) of moisture content lower than 6wt%; Hot pressing control temperature range is 180～220 DEG C;
D, plated film: on PVC film, be coated with EVA resin PUR, the moisture content then its mount being obtained in c step lower thanOn the medium density fibre board (MDF) of 6wt%, obtain medium density fibre board (MDF) of the present invention.
Wherein, PVC film refers to polyvinyl alcohol film; EVA refers to ethylene/vinyl acetate copolymer.
Further, in order to improve intensity and the toughness of medium density fibre board (MDF) of the present invention, by weight, described raw material wood fiberBe 93 weight portions, described aerodux is 5 weight portions, and described paraffin is 2 weight portions; Described lignocellulosic mixtureWater content is 9wt%; Described raw material wood fiber moisture content is 80wt%; Described phenoweld is polyvinyl alcohol contractingAldehyde phenol-formaldehyde resin modified, polyamide modified phenolic resins, epoxy modified phenolic resin, Effect of Organosilicon-modified Phenol-formaldehyde Resin, boron modificationAt least one in phenolic resins, dimethylbenzene phenol-formaldehyde resin modified, diphenyletherformalde-hyde resin.
Further, as preferred version, in described b step, pressure is 1MPa; Described c step is: by precompressed slab firstUnder 6Mpa, suppress 45 seconds, then under 1MPa, suppress 25 seconds, obtain moisture content lower than 6% fiberboard; Wherein, hot pressing temperatureSpend 200 DEG C.
Further, described raw material wood fiber is formed by following methods manufacture: the cork sheet that is 3～4:6～7 by mass ratio andHardwood sheet mixes, and obtains mixed wood, and screening, cleaning, defibrator process, dry, obtain raw material wood fiber; Wherein, mixed woodPH value is 5.0～5.5.
Wherein, described cork sheet refers to needlebush wood chip, and described hardwood sheet refers to leaf wood wood chip.
Further, in order to ensure the toughness of medium density fibre board (MDF) of the present invention, in described mixed wood, by mass, cork sheet:Hardwood sheet=7:13; Mixed wood pH value is 5.2.
Further, in the manufacture method a step of medium density fibre board (MDF) of the present invention, be dried and can adopt conventional drying method, the present inventionPreferably adopt and dodge anxious formula pipeline drying machine, wherein, can select according to production scale and demand the drying machine of suitable specification, the present inventionIn method, dodging anxious formula pipeline drying machine, preferably to adopt steam be medium, with add hot-air by be only applied with adhesive fiber orThe fiber of simultaneously having executed adhesive and paraffin is blowed and advances by hot blast in pipeline, and dry inlet temperature is 160～180 DEG C, goes out70～80 DEG C of mouth temperature, drying machine duct length is 80～120m, pipe diameter 1100～1400mm, obtains moisture contentIt is the lignocellulosic mixture of 8～10wt%; Wherein, dried fibres ability is 4000～6000kg/h, steam consumption quantity maximumBe 7500～8500kg/h, design air flow is 90000～100000m3/ h, blast is 4000～5000Pa.
Wherein, in order to take into account cost and production efficiency, preferably 170 DEG C of dry inlet temperatures, preferably 75 DEG C of outlet temperatures,The preferred 100m of drying machine duct length, the preferred 1250mm of pipe diameter, the preferred 5000kg/h of dried fibres ability, steam consumptionAmount is 8200kg/h, the preferred 95000m of design air flow to the maximum3/ h, the preferred 4500Pa of blast.
Further, in d step of the present invention, adopt commercially available cold paperhanging machine by the PVC film mount that has been coated with EVA resin PUR in cOn the medium density fibre board (MDF) of the moisture content that step obtains lower than 6wt%, obtain medium density fibre board (MDF) of the present invention.
Further, the manufacture method of wood fibre of the present invention after heat-press step, also comprise the steps: to fill plate, slab carry,Transversal edging, sanding.
Further, the invention also discloses the medium density fibre board (MDF) and the medium density fiber of the present invention that are prepared by said methodThe purposes of plate in cold rolling coil and cold-reduced sheet packaging.
Further, for medium density fibre board (MDF) of the present invention can better be applied in steel roll package, its thickness is preferably2.5～3.0mm。
The medium density fibre board (MDF) that the inventive method prepares is two-sided smooth, and water resistance is good, and intensity is high, and good toughness is lightweight,There is good physical property; Individual board dimension maximum can reach 2440*4880mm, exceeds current national standard full-size,Effectively avoid the obvious reduction due to aesthetics that board material splice causes, intensity, water resistance, can be used for cold rolling banded coil of stripOr dull and stereotyped packaging, in the packaging of coil of strip, transport, storage process, play protective action, effectively solve industrial products in packagingWith in logistics progress, there is rain penetration, plate body such as exposes, is out of shape or come off at the problem, alternative metals and plastics completely in functionGoods, have covered the dimensions of current domestic and international all coil of strips, and complete alternative metallic plate and plastic products in packaging reduceEnterprise's Production and Packaging cost.
Detailed description of the invention
The manufacture method of medium density fibre board (MDF) of the present invention, comprises the steps:
The preparation of a, lignocellulosic mixture: get 93～97 weight portion raw material wood fibers, by the modified phenolic of 3～5 weight portionsThe paraffin of resin binder and 0～2 weight portion sprays on wood fibre, and dry, obtaining water content is the wooden fibre of 8～10wt%Dimension mixture; Wherein, described raw material wood fiber moisture content is 75～85wt%;
B, precompressed: the lignocellulosic mixture that a step is obtained is suppressed under 0.5～2Mpa, obtain precompressed slab;
C, hot pressing: precompressed slab is suppressed 30～60 seconds under 4～8Mpa, then under 0.5～2.0MPa, suppressed 20～40 seconds,Obtain the medium density fibre board (MDF) of moisture content lower than 6wt%; Hot pressing control temperature range is 180～220 DEG C;
D, plated film: on PVC film, be coated with EVA resin PUR, the moisture content then its mount being obtained in c step lower thanOn the medium density fibre board (MDF) of 6wt%, obtain medium density fibre board (MDF) of the present invention.
Wherein, PVC film refers to polyvinyl alcohol film; EVA refers to ethylene/vinyl acetate copolymer.
Further, in order to improve intensity and the toughness of medium density fibre board (MDF) of the present invention, by weight, described raw material wood fiberBe 93 weight portions, described aerodux is 5 weight portions, and described paraffin is 2 weight portions; Described lignocellulosic mixtureWater content is 9wt%; Described raw material wood fiber moisture content is 80wt%; Described phenoweld is polyvinyl alcohol contractingAldehyde phenol-formaldehyde resin modified, polyamide modified phenolic resins, epoxy modified phenolic resin, Effect of Organosilicon-modified Phenol-formaldehyde Resin, boron modificationAt least one in phenolic resins, dimethylbenzene phenol-formaldehyde resin modified, diphenyletherformalde-hyde resin.
Further, as preferred version, in described b step, pressure is 1MPa; Described c step is: by precompressed slab firstUnder 6Mpa, suppress 45 seconds, then under 1MPa, suppress 25 seconds, obtain moisture content lower than 6% fiberboard; Wherein, hot pressing temperatureSpend 200 DEG C.
Further, described raw material wood fiber is formed by following methods manufacture: the cork sheet that is 3～4:6～7 by mass ratio andHardwood sheet mixes, and obtains mixed wood, and screening, cleaning, defibrator process, dry, obtain raw material wood fiber; Wherein, mixed woodPH value is 5.0～5.5.
Wherein, described cork sheet refers to needlebush wood chip, and described hardwood sheet refers to leaf wood wood chip.
Further, in order to ensure the toughness of medium density fibre board (MDF) of the present invention, in described mixed wood, by mass, cork sheet:Hardwood sheet=7:13; Mixed wood pH value is 5.2.
Further, in the manufacture method a step of medium density fibre board (MDF) of the present invention, be dried and can adopt conventional drying method, the present inventionPreferably adopt and dodge anxious formula pipeline drying machine, wherein, can select according to production scale and demand the drying machine of suitable specification, the present inventionIn method, dodging anxious formula pipeline drying machine, preferably to adopt steam be medium, with add hot-air by be only applied with adhesive fiber orThe fiber of simultaneously having executed adhesive and paraffin is blowed and advances by hot blast in pipeline, and dry inlet temperature is 160～180 DEG C, goes out70～80 DEG C of mouth temperature, drying machine duct length is 80～120m, pipe diameter 1100～1400mm, obtains moisture contentIt is the lignocellulosic mixture of 8～10wt%; Wherein, dried fibres ability is 4000～6000kg/h, steam consumption quantity maximumBe 7500～8500kg/h, design air flow is 90000～100000m3/ h, blast is 4000～5000Pa.
Wherein, in order to take into account cost and production efficiency, preferably 170 DEG C of dry inlet temperatures, preferably 75 DEG C of outlet temperatures,The preferred 100m of drying machine duct length, the preferred 1250mm of pipe diameter, the preferred 5000kg/h of dried fibres ability, steam consumptionAmount is 8200kg/h, the preferred 95000m of design air flow to the maximum3/ h, the preferred 4500Pa of blast.
Further, in d step of the present invention, adopt commercially available cold paperhanging machine by the PVC film mount that has been coated with EVA resin PUR in cOn the medium density fibre board (MDF) of the moisture content that step obtains lower than 6wt%, obtain medium density fibre board (MDF) of the present invention.
Further, the manufacture method of wood fibre of the present invention after heat-press step, also comprise the steps: to fill plate, slab carry,Transversal edging, sanding.
Further, the invention also discloses the medium density fibre board (MDF) and the medium density fiber of the present invention that are prepared by said methodThe purposes of plate in cold rolling coil and cold-reduced sheet packaging.
Further, for medium density fibre board (MDF) of the present invention can better be applied in steel roll package, its thickness is preferably2.5～3.0mm。
Below in conjunction with embodiment, the specific embodiment of the present invention is further described, does not therefore limit the present invention to instituteAmong the scope of embodiments of stating.
Embodiment 1 prepares medium density fibre board (MDF) by the inventive method
The preparation of a, lignocellulosic mixture: get 93kg raw material wood fiber, by the phenoweld of 3kg and 0.5The paraffin of weight portion sprays on wood fibre, dry, obtains the lignocellulosic mixture that water content is 8wt%; Wherein, described formerMaterial wood fibre water content is 75wt%; Dry employing dodged anxious formula pipeline drying, and to adopt steam be medium, with adding hot-air generalThe fiber of having executed adhesive and paraffin is blowed and advances by hot blast in pipeline, and dry inlet temperature is 160 DEG C, outlet temperature70 DEG C, drying machine duct length is 80m, and pipe diameter 1100mm obtains the lignocellulosic mixture that moisture content is 8wt%;Wherein, dried fibres ability is 4000kg/h, and steam consumption quantity is 7500kg/h to the maximum, and design air flow is 90000m3/ h, blastFor 4000Pa;
B, precompressed: the lignocellulosic mixture that a step is obtained is suppressed under 0.5pa, obtain precompressed slab;
C, hot pressing: precompressed slab is suppressed 60 seconds under 4Mpa, then under 0.5MPa, is suppressed 40 seconds, obtain moisture content lower thanThe medium density fibre board (MDF) of 6wt%; Wherein, hot pressing temperature is controlled at 180 DEG C;
D, plated film: on PVC film, be coated with EVA resin PUR, then utilize cold paperhanging machine obtains its mount in c step containOn the medium density fibre board (MDF) of water rate lower than 6wt%, obtain medium density fibre board (MDF) of the present invention.
Wherein, raw material wood fiber is formed by following methods manufacture: the cork sheet that is 3:7 by mass ratio and hardwood sheet mix,Mixed wood, screening, cleaning, defibrator process, dry, obtain raw material wood fiber; Wherein, mixed wood pH value is 5.0.
Embodiment 2 prepares medium density fibre board (MDF) by the inventive method
The preparation of a, lignocellulosic mixture: get 95kg raw material wood fiber, by the phenoweld of 4kg and 0～The paraffin of 2 weight portions sprays on wood fibre, dry, obtains the lignocellulosic mixture that water content is 9wt%; Wherein, described inRaw material wood fiber moisture content is 80wt%; Dry employing dodged anxious formula pipeline drying, and to adopt steam be medium, with adding hot-airThe fiber of having executed adhesive and paraffin is blowed and advanced by hot blast in pipeline, and dry inlet temperature is 170 DEG C, outlet temperature75 DEG C, drying machine duct length is 100m, and pipe diameter 1250mm obtains the lignocellulosic mixture that moisture content is 9wt%;Wherein, dried fibres ability is 5000kg/h, and steam consumption quantity is 8200kg/h to the maximum, and design air flow is 95000m3/ h, blastFor 4500Pa;
B, precompressed: the lignocellulosic mixture that a step is obtained is suppressed under 1Mpa, obtain precompressed slab;
C, hot pressing: precompressed slab is suppressed 35 seconds under 6Mpa, then under 1MPa, suppressed 25 seconds, obtain moisture content lower than 6wt%Medium density fibre board (MDF); Wherein, hot pressing temperature is controlled at 200 DEG C;
D, plated film: on PVC film, be coated with EVA resin PUR, then utilize cold paperhanging machine obtains its mount in c step containOn the medium density fibre board (MDF) of water rate lower than 6wt%, obtain medium density fibre board (MDF) of the present invention.
Wherein, raw material wood fiber is formed by following methods manufacture: the cork sheet that is 2:3 by mass ratio and hardwood sheet mix,Mixed wood, screening, cleaning, defibrator process, dry, obtain raw material wood fiber; Wherein, mixed wood pH value is 5.0.
Embodiment 3 prepares medium density fibre board (MDF) by the inventive method
The preparation of a, lignocellulosic mixture: get 97kg raw material wood fiber, by the phenoweld of 5kg and 2kgParaffin spray on wood fibre, dry, obtain the lignocellulosic mixture that water content is 10wt%; Wherein, described raw material woodMatter fiber moisture content is 85wt%; Dry employing dodged anxious formula pipeline drying, and to adopt steam be medium, will execute with adding hot-airThe fiber of adhesive and paraffin is blowed and advances by hot blast in pipeline, and dry inlet temperature is 180 DEG C, 80 DEG C of outlet temperatures,Drying machine duct length is 120m, and pipe diameter 1400mm obtains the lignocellulosic mixture that moisture content is 10wt%; Wherein,Dried fibres ability is 6000kg/h, and steam consumption quantity is 8500kg/h to the maximum, and design air flow is 100000m3/ h, blast is5000Pa；
B, precompressed: the lignocellulosic mixture that a step is obtained is suppressed under 2Mpa, obtain precompressed slab;
C, hot pressing: precompressed slab is suppressed 30 seconds under 8Mpa, then under 2.0MPa, is suppressed 20 seconds, obtain moisture content lower thanThe medium density fibre board (MDF) of 6wt%; Wherein, hot pressing temperature is controlled at 220 DEG C;
D, plated film: on PVC film, be coated with EVA resin PUR, then utilize cold paperhanging machine obtains its mount in c step containOn the medium density fibre board (MDF) of water rate lower than 6wt%, obtain medium density fibre board (MDF) of the present invention.
Wherein, raw material wood fiber is formed by following methods manufacture: the cork sheet that is 1:2 by mass ratio and hardwood sheet mix,Mixed wood, screening, cleaning, defibrator process, dry, obtain raw material wood fiber; Wherein, mixed wood pH value is 5.2.
Embodiment 4 prepares medium density fibre board (MDF) by the inventive method
The preparation of a, lignocellulosic mixture: get 95kg raw material wood fiber, by the phenoweld of 4kg and 2kgParaffin spray on wood fibre, dry, obtain the lignocellulosic mixture that water content is 9wt%; Wherein, described raw material woodFiber moisture content is 80wt%; Dry employing dodged anxious formula pipeline drying, and to adopt steam be medium, glues executing with adding hot-airThe fiber of mixture and paraffin is blowed and advances by hot blast in pipeline, and dry inlet temperature is 170 DEG C, and 75 DEG C of outlet temperatures are dryDry machine duct length is 100m, and pipe diameter 1250mm obtains the lignocellulosic mixture that moisture content is 9wt%; Wherein, dryDry fiber ability is 5000kg/h, and steam consumption quantity is 8200kg/h to the maximum, and design air flow is 95000m3/ h, blast is 4500Pa;
B, precompressed: the lignocellulosic mixture that a step is obtained is suppressed under 1Mpa, obtain precompressed slab;
C, hot pressing: precompressed slab is suppressed 45 seconds under 6Mpa, then under 1MPa, suppressed 25 seconds, obtain moisture content lower than 6wt%Medium density fibre board (MDF); Wherein, hot pressing temperature is controlled at 200 DEG C;
D, plated film: on PVC film, be coated with EVA resin PUR, then utilize cold paperhanging machine obtains its mount in c step containOn the medium density fibre board (MDF) of water rate lower than 6wt%, obtain medium density fibre board (MDF) of the present invention.
Wherein, raw material wood fiber is formed by following methods manufacture: the cork sheet that is 7:13 by mass ratio and hardwood sheet mix,Mixed wood, screening, cleaning, defibrator process, dry, obtain raw material wood fiber; Wherein, mixed wood pH value is 5.5.
Embodiment 5 prepares medium density fibre board (MDF) by the inventive method
The preparation of a, lignocellulosic mixture: get 95kg raw material wood fiber, the phenoweld of 4kg is sprayedOn wood fibre, dry, obtain the lignocellulosic mixture that water content is 9wt%; Wherein, described raw material wood fiber moisture contentFor 80wt%; Dry employing dodged anxious formula pipeline drying, and to adopt steam be medium, will execute adhesive and paraffin with adding hot-airFiber in pipeline, blowed and advance by hot blast, dry inlet temperature is 170 DEG C, 75 DEG C of outlet temperatures, drying machine pipeline is longDegree is 100m, and pipe diameter 1250mm, obtains the lignocellulosic mixture that moisture content is 9wt%; Wherein, dried fibres abilityFor 5000kg/h, steam consumption quantity is 8200kg/h to the maximum, and design air flow is 95000m3/ h, blast is 4500Pa;
B, precompressed: the lignocellulosic mixture that a step is obtained is suppressed under 1Mpa, obtain precompressed slab;
C, hot pressing: precompressed slab is suppressed 40 seconds under 6Mpa, then under 1MPa, suppressed 35 seconds, obtain moisture content lower than 6wt%Medium density fibre board (MDF); Wherein, hot pressing temperature is controlled at 200 DEG C;
D, plated film: on PVC film, be coated with EVA resin PUR, then utilize cold paperhanging machine obtains its mount in c step containOn the medium density fibre board (MDF) of water rate lower than 6wt%, obtain medium density fibre board (MDF) of the present invention.
Wherein, raw material wood fiber is formed by following methods manufacture: the cork sheet that is 2:3 by mass ratio and hardwood sheet mix,Mixed wood, screening, cleaning, defibrator process, dry, obtain raw material wood fiber; Wherein, mixed wood pH value is 5.0.
Comparative example 1 medium density fibre board (MDF) performance test
Medium density fibre board (MDF) (A-2), existing common medium density fibre board (MDF) (MDF-GP), family that the embodiment of the present invention 2 is preparedTool type medium density fibre board (MDF) (MDF-FN) respectively in drying regime (MGR), dampness (MR), high humility state (HMR) andUnder outdoor state (EXT), test its physical and mechanical property according to the method in GBT11718-2009, numbering, in table 1, is testedThe results are shown in Table 2. Wherein, the thickness of above-mentioned two kinds of fiberboards is all 2.5mm.
Wherein, described drying regime refers to indoor environment or has the outdoor environment of safeguard measure. Be often referred to 20 DEG C of temperature, relativeHumidity is higher than 65%, or is only and has several week relative humidity to exceed 65% ambient condition one.
Described dampness refers to the outdoor environment that refers to indoor environment or have safeguard measure. Be often referred to 20 DEG C of temperature, relative humidityHigher than 65% but be no more than 85%, or be only and have several week relative humidity to exceed 85% ambient condition one.
Described high humility state refers to the outdoor environment that refers to indoor environment or have safeguard measure. Be often referred to temperature higher than 20 DEG C, phaseHumidity is greater than to 85%, or likely contacts once in a while the ambient condition of (soak or water except) with water.
Described outdoor state refers to that outdoor natural climate has Exposure to Sunlight, drenches with rain and air-polluting ambient condition.
Table 1
| Numbering | Fiberboard type | Applicable elements |
| A-2 MGR | The medium density fibre board (MDF) of embodiment 2 | Dry |
| MDF-GP MGR | Plain edition medium density fibre board (MDF) | Dry |
| A-2 MR | The medium density fibre board (MDF) of embodiment 2 | Moist |
| MDF-GP MR | Plain edition medium density fibre board (MDF) | Moist |
| A-2 HMR | The medium density fibre board (MDF) of embodiment 2 | High humility |
| MDF-GP HMR | Plain edition medium density fibre board (MDF) | High humility |
| A-2 EXT | The medium density fibre board (MDF) of embodiment 2 | Outdoor |
| MDF-FN EXT | Furniture type medium density fibre board (MDF) | Outdoor |
Table 2
As can be seen from Table 2, adopt the MOR of the medium density fibre board (MDF) for preparing of the inventive method under various states andInternal bond strength is all higher than medium density fibre board (MDF) of the prior art, and thickness swelling rate is all lower than middle density of the prior artFiberboard.
As can be seen here, the medium density fibre board (MDF) that adopts the inventive method to prepare has good toughness, bears pressure intensity of forceWith the ability of variations in temperature, meanwhile, also there is good resistance to water.
Claims (9)
1. the manufacture method of medium density fibre board (MDF), is characterized in that, comprises the steps:
The preparation of a, lignocellulosic mixture: get 93～97 weight portion raw material wood fibers, by the modified phenolic of 3～5 weight portionsThe paraffin of resin binder and 0～2 weight portion sprays on wood fibre, and dry, obtaining water content is the wooden fibre of 8～10wt%Dimension mixture;
Wherein, described raw material wood fiber moisture content is 75～85wt%, is formed by following methods: be 3～4:6～7 by mass ratioCork sheet and hardwood sheet mix, obtain mixed wood, screening, cleaning, defibrator process, dry, obtain raw material wood fiber; Wherein,Mixed wood pH value is 5.0～5.5;
Anxious formula pipeline drying machine is dodged in described dry employing; It is medium that the anxious formula pipeline drying of described sudden strain of a muscle machine adopts steam, with adding hot-airThe fiber that is only applied with the fiber of adhesive or has executed adhesive and paraffin is simultaneously blowed and advanced by hot blast in pipeline, dryDry inlet temperature is 160～180 DEG C, 70～80 DEG C of outlet temperatures, and drying machine duct length is 80～120m, pipeline is straightFootpath 1100～1400mm, obtains the lignocellulosic mixture that moisture content is 8～10wt%; Wherein, dried fibres ability be 4000～6000kg/h, steam consumption quantity is 7500～8500kg/h to the maximum, and design air flow is 90000～100000m3/ h, blast is 4000～5000Pa；
B, precompressed: the lignocellulosic mixture that a step is obtained is suppressed under 0.5～2Mpa, obtain precompressed slab;
C, hot pressing: precompressed slab is suppressed 30～60 seconds under 4～8Mpa, then under 0.5～2.0MPa, suppressed 20～40 seconds,Obtain the medium density fibre board (MDF) of moisture content lower than 6wt%; Wherein, hot pressing control temperature range is 180～220 DEG C;
D, plated film: on PVC film, be coated with EVA resin PUR, the moisture content then its mount being obtained in c step lower thanOn the medium density fibre board (MDF) of 6wt%, obtain medium density fibre board (MDF).
2. the manufacture method of medium density fibre board (MDF) according to claim 1, is characterized in that: by weight, and described raw materialWood fibre is 93 weight portions, and described aerodux is 5 weight portions, and described paraffin is 2 weight portions; Described wooden fibreDimension mixture water content is 9wt%; Described raw material wood fiber moisture content is 80wt%; Described phenoweld is for poly-Vinyl acetal phenol-formaldehyde resin modified, polyamide modified phenolic resins, epoxy modified phenolic resin, Effect of Organosilicon-modified Phenol-formaldehyde Resin,At least one in boron modified phenolic resin, dimethylbenzene phenol-formaldehyde resin modified, diphenyletherformalde-hyde resin.
3. the manufacture method of medium density fibre board (MDF) according to claim 1 and 2, is characterized in that: in described b step,Pressure is 1MPa; Described c step is: precompressed slab, prior to suppressing under 6Mpa 45 seconds, then is suppressed 25 seconds under 1MPa,Moisture content lower than 6% fiberboard; Wherein, 200 DEG C of hot pressing temperatures.
4. the manufacture method of medium density fibre board (MDF) according to claim 1, is characterized in that: by mass, and cork sheet:Hardwood sheet=7:13; Mixed wood pH value is 5.2.
5. the manufacture method of medium density fibre board (MDF) according to claim 1 and 2, is characterized in that, after hot pressing, also comprise asLower step: dress plate, slab conveying, transversal edging, sanding.
6. the manufacture method of medium density fibre board (MDF) according to claim 3, is characterized in that, also comprises following step after hot pressingRapid: dress plate, slab conveying, transversal edging, sanding.
7. the manufacture method of medium density fibre board (MDF) according to claim 4, is characterized in that, also comprises following step after hot pressingRapid: dress plate, slab conveying, transversal edging, sanding.
8. the medium density fibre board (MDF) that the method described in claim 1～7 any one prepares.
9. the purposes of medium density fibre board (MDF) claimed in claim 8 in cold rolling coil and cold-reduced sheet packaging.
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| CN110871479A (en) * | 2019-12-03 | 2020-03-10 | 浙江丽象木业有限公司 | Tower pressing type wood fiber plywood process |
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| CN104175699B (en) * | 2014-08-18 | 2016-08-17 | 攀枝花钢城集团印刷广告有限公司 | Medium density fibre board (MDF) and combination process thereof and laminating machine |
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| CN103934878A (en) | 2014-07-23 |
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