CN101664948B - Manufacturing method of surface compressed plate - Google Patents
Manufacturing method of surface compressed plate Download PDFInfo
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- CN101664948B CN101664948B CN2009101526530A CN200910152653A CN101664948B CN 101664948 B CN101664948 B CN 101664948B CN 2009101526530 A CN2009101526530 A CN 2009101526530A CN 200910152653 A CN200910152653 A CN 200910152653A CN 101664948 B CN101664948 B CN 101664948B
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- 238000004519 manufacturing process Methods 0.000 title abstract description 9
- 238000007906 compression Methods 0.000 claims abstract description 32
- 230000006835 compression Effects 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000007731 hot pressing Methods 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 81
- 239000000463 material Substances 0.000 claims description 64
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 54
- 239000003292 glue Substances 0.000 claims description 23
- 229920005989 resin Polymers 0.000 claims description 17
- 239000011347 resin Substances 0.000 claims description 17
- 239000002023 wood Substances 0.000 claims description 16
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 15
- 238000000280 densification Methods 0.000 claims description 11
- 229920000877 Melamine resin Polymers 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 9
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 9
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 230000011218 segmentation Effects 0.000 claims description 6
- 238000010792 warming Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 244000050510 Cunninghamia lanceolata Species 0.000 claims description 4
- 244000166124 Eucalyptus globulus Species 0.000 claims description 3
- 241000219000 Populus Species 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 8
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 239000005011 phenolic resin Substances 0.000 abstract description 2
- 229920001568 phenolic resin Polymers 0.000 abstract description 2
- 239000002344 surface layer Substances 0.000 abstract 3
- 238000005034 decoration Methods 0.000 abstract 1
- 238000005096 rolling process Methods 0.000 abstract 1
- 238000002791 soaking Methods 0.000 abstract 1
- 238000007598 dipping method Methods 0.000 description 3
- 239000011122 softwood Substances 0.000 description 3
- 238000012938 design process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004640 Melamine resin Substances 0.000 description 1
- QVYYOKWPCQYKEY-UHFFFAOYSA-N [Fe].[Co] Chemical compound [Fe].[Co] QVYYOKWPCQYKEY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
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- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention relates to a manufacturing method of a surface compressed plate, in particular to solving the technical problem of providing a manufacturing method of a surface compressed plate featuring high surface layer density, high strength, low probability of deformation, simple technology, strong operability and lighter color. The technical scheme for solving the problem is as follows: the method comprises the following steps: (1) drying and controlling the water content between 20% and 30%; (2) rolling and controlling the compression ratio between 10% and 30%; (3) impregnating surface layer, namely soaking one or two sides of the plate into light-color water-soluble low molecular weight phenolic resin adhesives at a concentration of 10-25%; (4) softening by steam and controlling the softening temperature between 120 DEG C and 140 DEG C and time between 20min and 60min; and (5) compressing surface layer and controlling the compression ratio between 15% and 50%, the hot pressing temperature between 160 DEG C and 180 DEG C and the unit pressure between 1.5MPa and 4.5MPa. The method is suitable for such fields as furniture manufacturing, indoor decoration and the like.
Description
Technical field
The present invention relates to a kind of preparation method of surface compressed plate.Be applicable to fields such as furniture manufacturing, indoor decorating.
Background technology
At present, China has entered the stage of a large amount of Application and Development artificial forest fast growing woods, but the artificial forest wood material is loose, density is lower, mechanical strength is poor, can not be directly as the material of furniture, indoor decorating etc.In order to overcome the shortcoming of artificial forest wood, usually adopt methods such as dipping, densification that it is strengthened, wherein the common compressed wood that makes by the densification method, surface compressedization timber (surface compressed material), compression shaping wood etc. make hardness, density, the intensity of artificial forest wood obtain bigger raising, have realized the excellent usefulness of bad material.It carries out the densification processing by the top layer to artificial forest wood particularly surface compressed material, can be with the hardness of needs, the top layer that intensity concentrates on timber, and the densification part does not still keep lower density, both made timber that the very high ratio of strength to weight is arranged, and made the utilization ratio of timber and use value obtain bigger raising again.
In the prior art, some adopts timber softening or immersion back, timber top layer is softening with heating using microwave with poach, carries out the surface compressed surface compressed material that makes again, and size instability, compression very easily recover.
In the prior art, also some adopts common water-soluble phenolic resin adhesive or pf resin of low molecular weight glue or low-molecular-weight melamine resin adehsive that timber is carried out the normal pressure impregnation process, and the surface compressed material color that makes of method such as densification is dark more afterwards, dipping effect is poor, production efficiency is low.
Other has Chinese patent " surface compressed method of artificial forest softwood and products thereof " (ZL00120758.X), employing is placed on artificial forest wood in the airtight container, the surface compressed material of vacuumizing, impregnate pf resin of low molecular weight, pressurized treatments, vacuumize, step such as thermocompression forming being made has density height, indeformable, advantage such as dipping effect good, surface property is good.But it deposits following deficiency: handle the artificial forest softwood in airtight container (1), and complex process, operation easier is big, production efficiency is low; (2) the used pressure of thermocompression forming is 16.0-30.0MPa, does not indicate meter pressure or unit pressure, and technological parameter is indeterminate, and operability is not strong; (3) hot pressing pressure is too big, has caused the utilization rate of timber greatly to reduce; (4) color that makes surface compressed material is still dark partially.
Summary of the invention
The technical problem to be solved in the present invention is: at the variety of issue that exists in the prior art, provide a kind of top layer density height, intensity greatly, not yielding, technology is simple, the preparation method of workable, surface compressed plate that color is more shallow.
The technical solution adopted in the present invention is: a kind of preparation method of surface compressed plate is characterized in that may further comprise the steps:
(1), drying, artificial forest wood saw cutd open is processed into the sheet material that thickness is 10～25mm, and be dried to moisture content 20～30%;
(2), roll-in, with dried sheet material, place between two pressure rollers of roll squeezer and carry out radially roll-in of band, the thickness compression ratio of sheet material during through pressure roller is controlled at 10～30%;
(3), the top layer impregnates, and with the one side of the top layer part of the sheet material after the roller process, accounts for 15～25% of sheet metal thickness immediately, is soaked in concentration and is in 10～25% the light colour water-solubility pf resin of low molecular weight glue, absorbs glue in the sheet material Recovery Process; Perhaps the sheet material after the roll-in is soaked in immediately in the light colour water-solubility pf resin of low molecular weight glue that concentration is 10-25% and impregnates processing;
(4), steam is softening, the sheet material after impregnating sprayed steam softening the processing, softening temperature is controlled at 120～140 ℃, the time is 20～60min;
(5), the top layer densification, place hot press to compress the sheet material after softening, compression ratio is controlled between 15～50%, hot pressing temperature is 160～180 ℃, unit pressure is 1.5～4.5MPa; Adopt the method for segmentation pressurization during compression, pressure increases to maximum pressure gradually, and heat-insulation pressure keeping when compressed thickness reaches the thickness of design adopts finger gauge control thickness, and compression time is 1.0～3.0min/mm; Stop heating afterwards, under situation about keep-uping pressure, in press, feed cooling water, be cooled to the release discharging of back below 50 ℃.
Described artificial forest fast growing wood is China fir, poplar or Eucalyptus.
Used the light colour water-solubility pf resin of low molecular weight glue that the sheet material color is shoaled in the above-mentioned preparation method, the raw material of this glue adopts phenol, formaldehyde, NaOH and melamine, the mol ratio of first three kind is pressed phenol: formaldehyde: NaOH=1: 1.5～3.0: 0.1～0.2, the input amount of melamine is 20～40% of a phenol total amount, and processing step is as follows:
(a) dissolve phenol, when temperature is 60～65 ℃, add NaOH, addition accounts for 50～70% of NaOH throwing amount always, reacts 20 minutes;
(b) add formaldehyde, addition accounts for 70～80% of formaldehyde throwing amount always for the first time, is warming up to 85～95 ℃, reacts 10～30 minutes; Cool to 60～75 ℃, add second batch of formaldehyde, addition accounts for 10～15% of formaldehyde throwing amount always; And adding NaOH, addition accounts for 10～20% of NaOH throwing amount always;
(c) be warming up to 85～95 ℃, be incubated 10～20 minutes, add melamine, input amount is 20～40% of a phenol total amount; And adding the 3rd crowd of formaldehyde and NaOH, the 10～15%, three batch of NaOH addition that the 3rd batch of formaldehyde addition accounts for formaldehyde throwing amount always accounts for 10～40% of NaOH throwing amount always; Reacted 10～25 minutes;
(d) survey water number, when water number reaches 5～10, add water cooling to room temperature, discharging.
This light colour water-solubility pf resin of low molecular weight glue, color are iron cobalt colorimetric 5～8, solid content 40～45%, and the pH value is 9～11, and viscosity is 13～15 seconds (being coated with-4 glasss), and molecular weight 95% is between 250～450.
The invention has the beneficial effects as follows: the sheet material top layer density height of producing with this method, intensity greatly, not yielding; Technology is simple, needn't handle the artificial forest softwood in airtight container, and production efficiency is higher; Technological parameter is clear and definite, and is workable; Color is more shallow, can be directly as the material of furniture, indoor decorating.
The specific embodiment
Embodiment 1,
At first prepare light colour water-solubility pf resin of low molecular weight glue, raw material adopts phenol, formaldehyde, NaOH and melamine, the mol ratio of first three kind is pressed phenol: formaldehyde: NaOH=1: 1.5～3.0: 0.1～0.2, the input amount of melamine is 20～40% of a phenol total amount, and technical process is as follows:
(a) dissolve phenol, when temperature is 60～65 ℃, add NaOH, addition accounts for 50～70% of NaOH throwing amount always, reacts 20 minutes;
(b) add formaldehyde, addition accounts for 70～80% of formaldehyde throwing amount always for the first time, is warming up to 85～95 ℃, reacts 10～30 minutes; Cool to 60～75 ℃, add second batch of formaldehyde, addition accounts for 10～15% of formaldehyde throwing amount always; And adding NaOH, addition accounts for 10～20% of NaOH throwing amount always;
(c) be warming up to 85～95 ℃, be incubated 10～20 minutes, add melamine, input amount is 20～40% of a phenol total amount; And adding the 3rd crowd of formaldehyde and NaOH, the 10～15%, three batch of NaOH addition that the 3rd batch of formaldehyde addition accounts for formaldehyde throwing amount always accounts for 10～40% of NaOH throwing amount always; Reacted 10～25 minutes;
(d) survey water number, when water number reaches 5～10, add water cooling to room temperature, discharging.
Subsequent sheet material is handled, in the example method only a surface to sheet material impregnate processing.
(1), drying, artificial forest wood China fir saw cutd open is processed into the sheet material that thickness is 10mm, and be dried to moisture content 20%;
(2), roll-in, with dried sheet material, place between two pressure rollers of roll squeezer and carry out radially roll-in of band, the thickness compression ratio of sheet material during through pressure roller is controlled at 10%;
(3), the top layer impregnates, and with the one side of the top layer part of the sheet material after the roller process, accounts for 15% of sheet metal thickness immediately, is soaked in concentration and is in 10% the light colour water-solubility pf resin of low molecular weight glue, sheet material absorbs glue in Recovery Process;
(4), steam is softening, the sheet material after impregnating sprayed steam softening the processing, softening temperature is controlled at 120 ℃, the time is 20min;
(5), the top layer densification, place hot press to compress the sheet material after softening, compression ratio is controlled between the 15-50%, hot pressing temperature is 160 ℃, unit pressure is 1.5MPa; Adopt the method for segmentation pressurization during compression, pressure increases to maximum pressure 1.5MPa gradually, heat-insulation pressure keeping when compressed thickness reaches the thickness of design, and compression process adopts finger gauge control thickness, and compression time is 1.0min/mm; Stop heating afterwards, under situation about keep-uping pressure, in press, feed cooling water, be cooled to the release discharging of back below 50 ℃.
Embodiment 2,
The preparation technology of the light colour water-solubility pf resin of low molecular weight glue that this example is used is identical with example 1, also is that processing is impregnated on a surface of sheet material to the processing of sheet material.Step is as follows:
(1), drying, artificial forest wood poplar saw cutd open is processed into the sheet material that thickness is 25mm, and be dried to moisture content 30%;
(2), roll-in, with dried sheet material, place between two pressure rollers of roll squeezer and carry out radially roll-in of band, the thickness compression ratio of sheet material during through pressure roller is controlled at 30%;
(3), the top layer impregnates, and with the one side of the top layer part of the sheet material after the roller process, accounts for 25% of sheet metal thickness immediately, is soaked in concentration and is in 25% the light colour water-solubility pf resin of low molecular weight glue, sheet material absorbs glue in Recovery Process;
(4), steam is softening, the sheet material after impregnating sprayed steam softening the processing, softening temperature is controlled at 140 ℃, the time is 60min;
(5), the top layer densification, place hot press to compress the sheet material after softening, compression ratio is controlled between the 15-50%, hot pressing temperature is 180 ℃, unit pressure is 4.5MPa; Adopt the method for segmentation pressurization during compression, pressure increases to maximum pressure 4.5MPa gradually, heat-insulation pressure keeping when compressed thickness reaches the thickness of design, and compression process adopts finger gauge control thickness, and compression time is 3.0min/mm; Stop heating afterwards, under situation about keep-uping pressure, in press, feed cooling water, be cooled to the release discharging of back below 50 ℃.
Embodiment 3,
The preparation technology of the light colour water-solubility pf resin of low molecular weight glue that this example is used is identical with example 1, also is that processing is impregnated on a surface of sheet material to the processing of sheet material.Step is as follows:
(1), drying, artificial forest wood eucalyptus wood saw cutd open is processed into the sheet material that thickness is 17mm, and be dried to moisture content 25%;
(2), roll-in, with dried sheet material, place between two pressure rollers of roll squeezer and carry out radially roll-in of band, the thickness compression ratio of sheet material during through pressure roller is controlled at 20%;
(3), the top layer impregnates, and with the one side of the top layer part of the sheet material after the roller process, accounts for 20% of sheet metal thickness immediately, is soaked in concentration and is in 18% the light colour water-solubility pf resin of low molecular weight glue, sheet material absorbs glue in Recovery Process;
(4), steam is softening, the sheet material after impregnating sprayed steam softening the processing, softening temperature is controlled at 130 ℃, the time is 40min;
(5), the top layer densification, place hot press to compress the sheet material after softening, compression ratio is controlled between 15～50%, hot pressing temperature is 170 ℃, unit pressure is 3MPa; Adopt the method for segmentation pressurization during compression, pressure increases to maximum pressure 3MPa gradually, and heat-insulation pressure keeping when compressed thickness reaches the thickness of design adopts finger gauge control thickness during compression, and compression time is 2.0min/mm; Stop heating afterwards, under situation about keep-uping pressure, in press, feed cooling water, be cooled to the release discharging of back below 50 ℃.
Embodiment 4,
The preparation technology of the light colour water-solubility pf resin of low molecular weight glue that this example is used is identical with example 1, and different is that processing is impregnated on two surfaces of sheet material with preceding 3 examples.Step is as follows:
(1), drying, artificial forest wood China fir saw cutd open is processed into the sheet material that thickness is 15～20mm, and be dried to moisture content 23～28%;
(2), roll-in, with dried sheet material, place between two pressure rollers of roll squeezer and carry out radially roll-in of band, the thickness compression ratio of sheet material during through pressure roller is controlled at 18～23%;
(3), the top layer impregnates, it is to impregnate processing in 18～23% the light colour water-solubility pf resin of low molecular weight glue that the sheet material after the roll-in is immersed in concentration immediately, sheet material absorbs glue in Recovery Process;
(4), steam is softening, the sheet material after impregnating sprayed steam softening the processing, softening temperature is controlled at 120～140 ℃, the time is 20～60min;
(5), the top layer densification, place hot press to compress the sheet material after softening, compression ratio is controlled between 15～50%, hot pressing temperature is 165～175 ℃, unit pressure is 2.5～3.5MPa; Adopt the method for segmentation pressurization during compression, pressure increases to maximum pressure gradually, and heat-insulation pressure keeping when compressed thickness reaches the thickness of design adopts finger gauge control thickness during compression, and compression time is 1.0～3.0min/mm; Stop heating afterwards, under situation about keep-uping pressure, in press, feed cooling water, be cooled to the release discharging of back below 50 ℃.
Used equipment is as roll squeezer and hot press, and operation in the foregoing description: heating using microwave is softening, feed cooling water etc. all is sheet material manufacturing equipment and technology commonly used, owing to be not the place of will putting of the present invention, does not do to launch introduction.
Claims (2)
1. the preparation method of a surface compressed plate is characterized in that may further comprise the steps:
(1), drying, artificial forest wood saw cutd open is processed into the sheet material that thickness is 10～25mm, and be dried to moisture content 20～30%;
(2), roll-in, with dried sheet material, place between two pressure rollers of roll squeezer and carry out radially roll-in of band, the thickness compression ratio of sheet material during through pressure roller is controlled at 10～30%;
(3), the top layer impregnates, and with the one side of the top layer part of the sheet material after the roller process, accounts for 15～25% of sheet metal thickness immediately, is soaked in concentration and is in 10～25% the light colour water-solubility pf resin of low molecular weight glue, absorbs glue in the sheet material Recovery Process; Perhaps the sheet material after the roll-in is soaked in immediately concentration and is in 10～25% the light colour water-solubility pf resin of low molecular weight glue and impregnate processing;
(4), steam is softening, the sheet material after impregnating sprayed steam softening the processing, softening temperature is controlled at 120～140 ℃, the time is 20～60min;
(5), the top layer densification, place hot press to compress the sheet material after softening, compression ratio is controlled between 15～50%, hot pressing temperature is 160～180 ℃, unit pressure is 1.5～4.5MPa; Adopt the method for segmentation pressurization during compression, pressure increases to maximum pressure gradually, and heat-insulation pressure keeping when compressed thickness reaches the thickness of design adopts finger gauge control thickness, and compression time is 1.0～3.0min/mm; Stop heating afterwards, under situation about keep-uping pressure, in press, feed cooling water, be cooled to the release discharging of back below 50 ℃;
The raw material of described light colour water-solubility pf resin of low molecular weight glue adopts phenol, formaldehyde, NaOH and melamine, the mol ratio of first three kind is pressed phenol: formaldehyde: NaOH=1: 1.5～3.0: 0.1～0.2, the input amount of melamine is 20～40% of a phenol total amount, and processing step is as follows:
(a) dissolve phenol, when temperature is 60～65 ℃, add NaOH, addition accounts for 50～70% of NaOH throwing amount always, reacts 20 minutes;
(b) add formaldehyde, addition accounts for 70～80% of formaldehyde throwing amount always for the first time, is warming up to 85～95 ℃, reacts 10～30 minutes; Cool to 60～75 ℃, add second batch of formaldehyde, addition accounts for 10～15% of formaldehyde throwing amount always; And adding NaOH, addition accounts for 10～20% of NaOH throwing amount always;
(c) be warming up to 85～95 ℃, be incubated 10～20 minutes, add melamine, input amount is 20～40% of a phenol total amount; And adding the 3rd crowd of formaldehyde and NaOH, the 10～15%, three batch of NaOH addition that the 3rd batch of formaldehyde addition accounts for formaldehyde throwing amount always accounts for 10～40% of NaOH throwing amount always; Reacted 10～25 minutes;
(d) survey water number, when water number reaches 5～10, add water cooling to room temperature, discharging.
2. the preparation method of surface compressed plate according to claim 1, it is characterized in that: described artificial forest fast growing wood is China fir, poplar or Eucalyptus.
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| CN1128197A (en) * | 1995-10-27 | 1996-08-07 | 陈录琳 | Manufacturing method for fire-proof veneer board with pattern |
| EP0832736A2 (en) * | 1996-09-13 | 1998-04-01 | Mario Caporello | Process for the realisation of a wooden stratified panel of the reinforced type and panel thus obtained |
| CN1181302A (en) * | 1997-12-01 | 1998-05-13 | 张传顺 | Method for prodn. of quarter-sawed material |
| CN1208684A (en) * | 1998-08-24 | 1999-02-24 | 宋国才 | Method for modifying wood |
| CN1422731A (en) * | 2001-12-03 | 2003-06-11 | 卢大伟 | Wood treating method |
| US20060288885A1 (en) * | 2005-02-04 | 2006-12-28 | Park Young W | Method for enhancing texture of wood panel |
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