CN104249496B - A kind of fireproof heat insulating composite light sheet material and preparation method thereof - Google Patents
A kind of fireproof heat insulating composite light sheet material and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to composite fire-proof insulation material technical field, it is related to a kind of composite light sheet material and preparation method thereof, if the composite light material includes the structure needling fiber carpet veneer and thermosetting phenolic resin layer that dried layer is alternately laid, the wherein the superiors of composite light sheet material and orlop are thermosetting phenolic resin layer.Compared with existing insulation material, fireproof heat insulating composite light sheet material provided by the invention is light and intensity is high, good waterproof performance, and fireproof heat insulating sound insulation value is good；And overcome inflammable existing insulation material, easy efflorescence, the shortcomings that fragility is big, and the compressive strength of product is also improved, it is easy for construction.
Description
Technical field
The invention belongs to composite fire-proof insulation material technical field, is related to a kind of composite light sheet material and preparation method thereof.
Background technology
In recent years, there is what is heard during the fire that China triggers by insulation material, and the massive losses of frequency and personnel's property touch
Mesh is soul-stirring.Insulation market is made a general survey of, the insulation material being commonly used mainly there are expanded polystyrene foams（EPS）, extrusion molding gathers
Styrenic foams (XPS), polyurethane foam（PU）Deng.EPS, XPS, PU belong to organic insulation material, light, insulation, thermal insulation
It is good, but prevent fires, security it is poor, easy to aging, easy firing.Even Mars caused by electric welding, these insulation materials can also risen
Fire.Smog is big during burning, toxicity is big.Particularly eps foam, XPS foams, fire resistance extreme difference, with regard to softening transform more than 80 DEG C
Melting drippage.Not only cause huge environmental pollution, the rescue work to fire brings great inconvenience, and jeopardize resident family and
The life security of fireman.Just because of this, in developed countries such as America and Europes, carries out exterior-wall heat insulation to Important building, skyscraper, one
As require and make combustibility and fire endurance experiment to heat-insulation system and heat-insulating material, and be divided into some grades.Different brackets
System and material be applicable different range Building Fire Protection requirement.Up to the present, EPS sheet thin plastering exterior wall heat-insulation system due to
It is related to serious fire safety problem, has individual state more than 20 to prohibit the use of in the U.S.；Being built more than Britain, 18 meters does not allow to use EPS sheet
Thin plastering exterior wall heat-insulation system；Being built more than Germany, 22 meters does not allow to use EPS sheet thin plastering exterior wall heat-insulation system.
On September 25th, 2009, the Ministry of Public Security, house and town and country construction portion, which combine, to formulate《Civil buildings outer heat preservation system and
Decoration of exterior wall fire prevention temporary provisions》, this article regulation：Civil buildings are highly more than or equal to more than or equal to 100 meters, other civil buildings
50 meters, curtain wall type building be higher than 24 meters when, the combustibility of insulation material should be A levels；During less than above-mentioned height, fire prevention should be set up
Isolation strip.This brings huge market to domestic phenolic aldehyde manufacturer.Phenolic foam plate is light, thermal conductivity factor is low, but easy powder
Change, fragility is big, construction inconvenience, in addition, in order that chemical composition is fully volatilized after high temperature foaming, keep sheet material dimensionally stable, newly
The phenolic board of production typically wants the talent of post curing 21 can be used.
The content of the invention
It is an object of the invention to the deficiency for existing insulation material, there is provided a kind of fireproof heat insulating composite light sheet material and
Its preparation method.
To achieve the above object, the present invention uses following technical scheme：
A kind of composite light sheet material, if it includes the needling fiber carpet veneer and thermosetting phenolic resin that dried layer is alternately laid
Layer, wherein the superiors of composite light sheet material and orlop are thermosetting phenolic resin layer.
The number of plies of described needling fiber carpet veneer is 2~15 layers.
The mass ratio of described phenolic resin and needling fiber felt is 100：（55~185）.
Described composite light sheet material infiltrates needling fiber felt by thermosetting phenolic resin and formed through molding, wherein described
Infiltration is that normal temperature infiltrates naturally, without heating or pressurizeing.
The density of described composite light sheet material is 150~350kg/m3, general thickness is 20~60mm, and thermal conductivity factor is
0.038~0.046W/（m·k）, compressive strength is 0.17~0.55Mpa.
Described thermosetting phenolic resin is 2127 type phenolic resin, 2130 type phenolic resin or boron bakelite resin.
2127 described type phenolic resin are dissolved in ethanol, and concentration is 70~80%.
2130 described type phenolic resin are dissolved in ethanol, and concentration is 70~80%.
Described boron bakelite resin is dissolved in ethylene glycol, and concentration is 65~80%.
Described fiber needled felt is fiberglass needled mat, basalt fibre Nomex or carbon fiber Nomex.
Described fiber needled felt is that fiber forms through combing, shredding, cross lapping, acupuncture, it is desirable to which fluffy degree is high, thickness
For 3~20mm, bulk density is 100~200kg/m3。
A kind of preparation method of above-mentioned composite light sheet material, comprises the following steps：
（1）Spread a strata tetrafluoroethene processing release paper on the operational platform, equably spray upper phenolic resin, then by 0~
An angle of 90 degrees spreads one layer of needling fiber felt, then equably sprays upper phenolic resin, and 0~an angle of 90 degrees spreads one layer of needling fiber felt, successively
Analogize, finally equably spray phenolic resin again on needling fiber felt, cover a strata tetrafluoroethene processing release paper；
（2）Step（1）The multilayer material that middle berth is put well is put on vulcanizing press and is molded；
（3）After curing molding, without cold pressing, mould is directly moved back, is cut.
Described step（1）In, the number of plies of needling fiber felt is 2~15 layers；The quality of phenolic resin and needling fiber felt
Than for 100：（55~185）.
Described step（1）In, the quantity for spray of every layer of phenolic resin is 140~2700g/m2。
Described step（2）In molding be divided into three phases：（a）100~120 DEG C, 1~2Mpa of pressure are warming up to, is protected
Press 25~35min；（b）It is warming up to 135~150 DEG C, 2~3Mpa of pressure, 30~60min of pressurize；（c）It is warming up to 165~180
DEG C, 3~5Mpa of pressure, 60~120min of pressurize.
Described step（2）In, during molding, the right and left of vulcanizing press adds limited block, and spacing block size is
2500mm×100mm×（20~60mm）.
It is compared with existing insulation material, the advantages of fireproof heat insulating composite light sheet material provided by the invention：
1. fireproof heat insulating composite light sheet material provided by the invention is light and intensity is high, good waterproof performance, fireproof heat insulating sound insulation
Performance is good；
2. fireproof heat insulating composite light sheet material provided by the invention overcomes inflammable existing insulation material, easy efflorescence, fragility
The shortcomings that big, improve product quality；
3. fireproof heat insulating composite light sheet material provided by the invention improves the compressive strength of product, easy for construction, user
It is easy to receive.
Embodiment
The present invention is illustrated with reference to embodiment.Phenolic resin in following examples bonds purchased from Wuxi Ming Yang
Materials Co., Ltd.
Embodiment 1
The first step：A strata tetrafluoroethene processing release paper is spread on the operational platform, using the limited public affairs of spraying equipment during upper current chart
The LGPQ12CB type high pressure airless spray equipments of department, which equably spray, to be dissolved in ethanol, and concentration is 70% 2127 type phenolic resin,
The quantity for spray of every layer of phenolic resin is 141g/m2, layer of glass Nomex then is spread by 0 degree of angle, then equably in spraying
2127 type phenolic resin, 0 degree of angle spread layer of glass Nomex, the like, until all fiberglass needled mats are spread
If finishing, then equably spray upper 2127 type phenolic resin, lid last layer processing release paper.The number of plies of fiberglass needled mat is 7 layers,
Thickness is 3mm, bulk density 100kg/m3.The mass ratio of 2127 type phenolic resin and fiberglass needled mat is 100：185.
Second step：Fiberglass needled mat after 2127 type phenolic resin are infiltrated, which is kept flat to the neat just hydraulic machinery in Shanghai, to be had
It is molded on the type vulcanizing press of XLB-2500 × 1300 of limit company × 1, the right and left adds limited block, the size of limited block
For 2500mm × 100mm × 20mm.Molding is divided into three phases：（1）It is warming up to 100 DEG C, pressure 1Mpa, pressurize 25min；（2）
It is warming up to 135 DEG C, pressure 2Mpa, pressurize 30min；（3）It is warming up to 170 DEG C, pressure 3Mpa, pressurize 60min.
3rd step：After curing molding, without cold pressing, directly move back cross cutting and be cut into required size.
According to standard GB8624-2006, GB/T10294-2008, GB/T6343-2009, GB/T8813-2008 after testing
The burning grade of the fireproof heat insulating composite light sheet material is B levels, thermal conductivity factor 0.042W/（m·k）, thickness 20mm is apparent
Density is 150kg/m3, compressive strength 0.17Mpa.Meet requirement of the country to fire-retardant heat-insulation material basic performance.
Embodiment 2
The first step：A strata tetrafluoroethene processing release paper is spread on the operational platform, using the limited public affairs of spraying equipment during upper current chart
The LGPQ12CB type high pressure airless spray equipments of department, which equably spray, to be dissolved in ethanol, and concentration is 70% 2130 type phenolic resin,
The quantity for spray of every layer of phenolic resin is 1600g/m2, one layer of carbon fiber Nomex then is spread by 0 degree of angle, then equably in spraying
2130 type phenolic resin, an angle of 90 degrees spread one layer of carbon fiber Nomex, the like, until all carbon fiber Nomexs have been laid
Finish, then equably spray upper 2130 type phenolic resin, lid last layer processing release paper.The number of plies of carbon fiber Nomex is 4 layers, and thickness is
10mm, bulk density 110kg/m3.The mass ratio of 2130 type phenolic resin and carbon fiber Nomex is 100：55.
Second step：Carbon fiber Nomex after 2130 type phenolic resin are infiltrated keeps flat limited to the neat just hydraulic machinery in Shanghai
It is molded on the type vulcanizing press of XLB-2500 × 1300 of company × 1, both sides add limited block, and the size of limited block is
2500mm×100mm×40mm.Molding is divided into three phases：（1）It is warming up to 100 DEG C, pressure 1Mpa, pressurize 35min；（2）Rise
Temperature is to 140 DEG C, pressure 3Mpa, pressurize 60min；（3）It is warming up to 165 DEG C, pressure 5Mpa, pressurize 120min.
3rd step：After curing molding, without cold pressing, directly move back cross cutting and be cut into required size.
According to standard GB8624-2006, GB/T10294-2008, GB/T6343-2009, GB/T8813-2008 after testing
The burning grade of the fireproof heat insulating composite light sheet material is B levels, thermal conductivity factor 0.046W/（m·k）, thickness 40mm is apparent
Density is 260kg/m3, compressive strength 0.55Mpa.Meet requirement of the country to fire-retardant heat-insulation material basic performance.
Embodiment 3
The first step：A strata tetrafluoroethene processing release paper is spread on the operational platform, using the limited public affairs of spraying equipment during upper current chart
The LGPQ12CB type high pressure airless spray equipments of department, which equably spray, to be dissolved in ethanol, and concentration is 80% 2127 type phenolic resin,
The quantity for spray of every layer of phenolic resin is 2667g/m2, one layer of basalt fibre Nomex then is spread by 0 degree of angle, then equably spray
Upper 2127 type phenolic resin, 45 degree of angles spread one layer of basalt fibre Nomex, the like, until all basalt fibre pins
Thorn felt laying finishes, then equably sprays upper 2127 type phenolic resin, lid last layer processing release paper.The layer of basalt fibre Nomex
Number is 2 layers, thickness 20mm, bulk density 200kg/m3.The quality of 2127 type phenolic resin and basalt fibre Nomex
Than for 100：100.
Second step：Basalt fibre Nomex after 2127 type phenolic resin are infiltrated is kept flat to the neat just hydraulic machinery in Shanghai
It is molded on the type vulcanizing press of XLB-2500 × 1300 of Co., Ltd × 1, both sides add limited block, and the size of limited block is
2500mm×100mm×40mm.Molding is divided into three phases：（1）It is warming up to 110 DEG C, pressure 2Mpa, pressurize 30min；（2）Rise
Temperature is to 140 DEG C, pressure 3Mpa, pressurize 45min；（3）It is warming up to 170 DEG C, pressure 3Mpa, pressurize 90min.
3rd step：After curing molding, without cold pressing, directly move back cross cutting and be cut into required size.
According to standard GB8624-2006, GB/T10294-2008, GB/T6343-2009, GB/T8813-2008 after testing
The burning grade of the fireproof heat insulating composite light sheet material is B levels, thermal conductivity factor 0.038W/（m·k）, thickness 40mm is apparent
Density is 350kg/m3, compressive strength 0.53Mpa.Meet requirement of the country to fire-retardant heat-insulation material basic performance.
Embodiment 4
The first step：A strata tetrafluoroethene processing release paper is spread on the operational platform, using the limited public affairs of spraying equipment during upper current chart
The LGPQ12CB type high pressure airless spray equipments of department, which equably spray, to be dissolved in ethanol, and concentration is 80% 2130 type phenolic resin,
The quantity for spray of every layer of phenolic resin is 412.5g/m2, one layer of carbon fiber Nomex then is spread by 0 degree of angle, then equably in spraying
2130 type phenolic resin, 60 degree of angles spread one layer of carbon fiber Nomex, the like, until all carbon fiber Nomexs have been laid
Finish, then equably spray upper 2130 type phenolic resin, lid last layer processing release paper.The number of plies of carbon fiber Nomex is 15 layers, thickness
For 4mm, bulk density 110kg/m3.The mass ratio of 2130 type phenolic resin and carbon fiber Nomex is 100：100.
Second step：Carbon fiber Nomex after 2130 type phenolic resin are infiltrated keeps flat limited to the neat just hydraulic machinery in Shanghai
It is molded on the type vulcanizing press of XLB-2500 × 1300 of company × 1, both sides add limited block, and the size of limited block is
2500mm×100mm×60mm.Molding is divided into three phases：（1）It is warming up to 110 DEG C, pressure 1Mpa, pressurize 30min；（2）Rise
Temperature is to 140 DEG C, pressure 3Mpa, pressurize 60min；（3）It is warming up to 175 DEG C, pressure 5Mpa, pressurize 120min.
3rd step：After curing molding, without cold pressing, directly move back cross cutting and be cut into required size.
According to standard GB8624-2006, GB/T10294-2008, GB/T6343-2009, GB/T8813-2008 after testing
The burning grade of the fireproof heat insulating composite light sheet material is B levels, thermal conductivity factor 0.042W/（m·k）, thickness 60mm is apparent
Density is 192kg/m3, compressive strength 0.55Mpa.Meet requirement of the country to fire-retardant heat-insulation material basic performance.
Embodiment 5
The first step：A strata tetrafluoroethene processing release paper is spread on the operational platform, using the limited public affairs of spraying equipment during upper current chart
The LGPQ12CB type high pressure airless spray equipments of department, which equably spray, to be dissolved in ethylene glycol, and concentration is 65% boron bakelite resin, often
The quantity for spray of layer phenolic resin is 1250g/m2, layer of glass Nomex then is spread by 0 degree of angle, then equably spray upper boron
Phenolic resin, 30 degree of angles spread layer of glass Nomex, the like, until all fiberglass needled mats have been laid
Finish, then equably spray upper boron bakelite resin, lid last layer processing release paper.The number of plies of fiberglass needled mat is 2 layers, and thickness is
10mm, bulk density 150kg/m3.The mass ratio of boron bakelite resin and fiberglass needled mat is 100：80.
Second step：Fiberglass needled mat after boron bakelite resin is infiltrated is kept flat to the neat just limited public affairs of hydraulic machinery in Shanghai
It is molded on the type vulcanizing press of XLB-2500 × 1300 of department × 1, both sides add limited block, and the size of limited block is 2500mm
×100mm×20mm.Molding is divided into three phases：（1）It is warming up to 120 DEG C, pressure 1Mpa, pressurize 35min；（2）It is warming up to 150
DEG C, pressure 3Mpa, pressurize 60min；（3）It is warming up to 180 DEG C, pressure 4Mpa, pressurize 120min.
3rd step：After curing molding, without cold pressing, directly move back cross cutting and be cut into required size.
According to standard GB8624-2006, GB/T10294-2008, GB/T6343-2009, GB/T8813-2008 after testing
The burning grade of the fireproof heat insulating composite light sheet material is B levels, thermal conductivity factor 0.040W/（m·k）, thickness 40mm is apparent
Density is 291kg/m3, compressive strength 0.53Mpa.Meet requirement of the country to fire-retardant heat-insulation material basic performance.
Embodiment 6
The first step：A strata tetrafluoroethene processing release paper is spread on the operational platform, using the limited public affairs of spraying equipment during upper current chart
The LGPQ12CB type high pressure airless spray equipments of department, which equably spray, to be dissolved in ethylene glycol, and concentration is 70% boron bakelite resin, often
The quantity for spray of layer phenolic resin is 500g/m2, one layer of basalt fibre Nomex then is spread by 0 degree of angle, then equably in spraying
Boron bakelite resin, an angle of 90 degrees spread one layer of basalt fibre Nomex, the like, until all basalt fibre Nomexs are spread
If finishing, then equably spray upper boron bakelite resin, lid last layer processing release paper.The number of plies of basalt fibre Nomex is 5 layers, thick
Spend for 6mm, bulk density 100kg/m3.The mass ratio of boron bakelite resin and fiberglass needled mat is 100：100.
Second step：Basalt fibre Nomex after boron bakelite resin is infiltrated keeps flat limited to the neat just hydraulic machinery in Shanghai
It is molded on the type vulcanizing press of XLB-2500 × 1300 of company × 1, both sides add limited block, and the size of limited block is
2500mm×100mm×30mm.Molding is divided into three phases：（1）It is warming up to 120 DEG C, pressure 1Mpa, pressurize 30min；（2）Rise
Temperature is to 145 DEG C, pressure 2Mpa, pressurize 60min；（3）It is warming up to 180 DEG C, pressure 5Mpa, pressurize 120min.
3rd step：After curing molding, without cold pressing, directly move back cross cutting and be cut into required size.
According to standard GB8624-2006, GB/T10294-2008, GB/T6343-2009, GB/T8813-2008 after testing
The burning grade of the fireproof heat insulating composite light sheet material is B levels, thermal conductivity factor 0.041W/（m·k）, thickness 30mm is apparent
Density is 175kg/m3, compressive strength 0.51Mpa.Meet requirement of the country to fire-retardant heat-insulation material basic performance.
Embodiment 7
The first step：A strata tetrafluoroethene processing release paper is spread on the operational platform, using the limited public affairs of spraying equipment during upper current chart
The LGPQ12CB type high pressure airless spray equipments of department, which equably spray, to be dissolved in ethylene glycol, and concentration is 80% boron bakelite resin, often
The quantity for spray of layer phenolic resin is 658g/m2, layer of glass Nomex then is spread by 0 degree of angle, then equably spray upper boron
Phenolic resin, 60 degree of angles spread layer of glass Nomex, the like, until all fiberglass needled mats have been laid
Finish, then equably spray upper boron bakelite resin, lid last layer processing release paper.The number of plies of fiberglass needled mat is 6 layers, and thickness is
8mm, bulk density 120kg/m3.The mass ratio of boron bakelite resin and fiberglass needled mat is 100：125.
Second step：Fiberglass needled mat after boron bakelite resin is infiltrated is kept flat to the neat just limited public affairs of hydraulic machinery in Shanghai
It is molded on the type vulcanizing press of XLB-2500 × 1300 of department × 1, both sides add limited block, and the size of limited block is 2500mm
×100mm×50mm.Molding is divided into three phases：（1）It is warming up to 120 DEG C, pressure 2Mpa, pressurize 30min；（2）It is warming up to 150
DEG C, pressure 3Mpa, pressurize 60min；（3）It is warming up to 175 DEG C, pressure 4Mpa, pressurize 90min.
3rd step：After curing molding, without cold pressing, directly move back cross cutting and be cut into required size.
According to standard GB8624-2006, GB/T10294-2008, GB/T6343-2009, GB/T8813-2008 after testing
The burning grade of the fireproof heat insulating composite light sheet material is B levels, thermal conductivity factor 0.042W/（m·k）, thickness 50mm is apparent
Density is 184kg/m3, compressive strength 0.48Mpa.Meet requirement of the country to fire-retardant heat-insulation material basic performance.
The above-mentioned description to embodiment is understood that for ease of those skilled in the art and using this hair
It is bright.Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein
General Principle is applied in other embodiment without by performing creative labour.Therefore, the invention is not restricted to implementation here
Example, for those skilled in the art according to the announcement of the present invention, not departing from improvement that scope made and modification all should be
Within protection scope of the present invention.
Claims (8)
- A kind of 1. composite light sheet material, it is characterised in that：If the needling fiber carpet veneer and thermosetting phenol that are alternately laid including dried layer Urea formaldehyde layer, the wherein the superiors of composite light sheet material and orlop are thermosetting phenolic resin layer；The number of plies of described needling fiber carpet veneer is 2~15 layers；The thickness of described needling fiber felt is 3~20mm, and bulk density is 100~200kg/m3；The density of described composite light sheet material is 150~350kg/m3, general thickness is 20~60mm, thermal conductivity factor 0.038 ~0.046W/ (mk), compressive strength are 0.17~0.55Mpa；The preparation method of described composite light sheet material comprises the following steps：(1) a strata tetrafluoroethene processing release paper is spread on the operational platform, upper thermosetting phenolic resin is equably sprayed, then by 0 One layer of needling fiber felt of~90 degree of pavings, then upper thermosetting phenolic resin is equably sprayed, 0~90 degree of paving, one layer of needling fiber felt, The like, finally equably spray thermosetting phenolic resin again on needling fiber felt, cover a strata tetrafluoroethene and take off Mould paper；(2) multilayer material that step (1) middle berth is put well is put on vulcanizing press and be molded；(3) after curing molding, without cold pressing, mould is directly moved back, cuts, obtains the composite light sheet material；Molding in described step (2) is divided into three phases：(a) 100~120 DEG C, 1~2Mpa of pressure are warming up to, pressurize 25 ~35min；(b) 135~150 DEG C, 2~3Mpa of pressure, 30~60min of pressurize are warming up to；(c) 165~180 DEG C are warming up to, pressure 3~5Mpa of power, 60~120min of pressurize.
- 2. composite light sheet material according to claim 1, it is characterised in that：Thermosetting phenolic resin and needling fiber felt Mass ratio is 100：(55~185).
- 3. composite light sheet material according to claim 1, it is characterised in that：Described composite light sheet material is by thermosetting phenol Urea formaldehyde infiltrates needling fiber felt and formed through molding, is infiltrated naturally wherein described infiltration is normal temperature.
- 4. composite light sheet material according to claim 1, it is characterised in that：Described thermosetting phenolic resin is 2127 types Phenolic resin, 2130 type phenolic resin or boron bakelite resin；Wherein, 2127 described type phenolic resin are dissolved in ethanol, and concentration is 70~80%；2130 described type phenolic resin are dissolved in ethanol, and concentration is 70~80%；Described boron bakelite resin is dissolved in ethylene glycol, and concentration is 65~80%.
- 5. composite light sheet material according to claim 1, it is characterised in that：Described needling fiber felt is acupuncture glass fibers Tie up felt, acupuncture basalt fibre felt or acupuncture carbon fiber felt.
- A kind of 6. preparation method of composite light sheet material according to claim any one of 1-5, it is characterised in that：Including with Lower step：(1) a strata tetrafluoroethene processing release paper is spread on the operational platform, upper thermosetting phenolic resin is equably sprayed, then by 0 One layer of needling fiber felt of~90 degree of pavings, then upper thermosetting phenolic resin is equably sprayed, 0~90 degree of paving, one layer of needling fiber felt, The like, finally equably spray thermosetting phenolic resin again on needling fiber felt, cover a strata tetrafluoroethene and take off Mould paper；(2) multilayer material that step (1) middle berth is put well is put on vulcanizing press and be molded；(3) after curing molding, without cold pressing, mould is directly moved back, cuts, obtains the composite light sheet material；Molding in described step (2) is divided into three phases：(a) 100~120 DEG C, 1~2Mpa of pressure are warming up to, pressurize 25 ~35min；(b) 135~150 DEG C, 2~3Mpa of pressure, 30~60min of pressurize are warming up to；(c) 165~180 DEG C are warming up to, pressure 3~5Mpa of power, 60~120min of pressurize.
- 7. preparation method according to claim 6, it is characterised in that：In described step (1), every layer of thermosetting phenolic tree The quantity for spray of fat is 140~2700g/m2。
- 8. preparation method according to claim 6, it is characterised in that：In described step (2), during molding, compression molding The right and left of machine adds limited block, and spacing block size is 2500mm × 100mm × (20~60) mm.
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| CN103015620A (en) * | 2012-12-27 | 2013-04-03 | 山东圣泉化工股份有限公司 | Preparation method of glass fiber reinforced plastic foam sandwich panel |
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Denomination of invention: Fireproof heat insulation composite lightweight sheet material and preparation method thereof Effective date of registration: 20191202 Granted publication date: 20180227 Pledgee: Chuzhou economic and Technological Development Corporation Pledgor: Shanghai Jieshijie New Materials (Group) Co., Ltd. Registration number: Y2019980000815 |