CN116476508A - Production process method of glass fiber fireproof heat-insulating core material - Google Patents
Production process method of glass fiber fireproof heat-insulating core material Download PDFInfo
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- CN116476508A CN116476508A CN202310436589.9A CN202310436589A CN116476508A CN 116476508 A CN116476508 A CN 116476508A CN 202310436589 A CN202310436589 A CN 202310436589A CN 116476508 A CN116476508 A CN 116476508A
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- 239000003365 glass fiber Substances 0.000 title claims abstract description 119
- 239000011162 core material Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 239000000835 fiber Substances 0.000 claims abstract description 61
- 239000000203 mixture Substances 0.000 claims abstract description 41
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 36
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 36
- 239000003292 glue Substances 0.000 claims abstract description 29
- 239000000843 powder Substances 0.000 claims abstract description 24
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 20
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000007787 solid Substances 0.000 claims abstract description 11
- 238000007731 hot pressing Methods 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 31
- 239000011248 coating agent Substances 0.000 claims description 18
- 238000000576 coating method Methods 0.000 claims description 18
- 229910052742 iron Inorganic materials 0.000 claims description 15
- 238000003892 spreading Methods 0.000 claims description 15
- 230000007480 spreading Effects 0.000 claims description 15
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 14
- 239000004568 cement Substances 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 11
- 230000001070 adhesive effect Effects 0.000 claims description 11
- 238000007664 blowing Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 8
- 230000032683 aging Effects 0.000 claims description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 7
- 239000001569 carbon dioxide Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 4
- 238000004090 dissolution Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 description 15
- 239000000463 material Substances 0.000 description 9
- 238000004513 sizing Methods 0.000 description 9
- 239000002994 raw material Substances 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 6
- 239000011521 glass Substances 0.000 description 5
- 239000004831 Hot glue Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000007790 scraping Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- 229920000297 Rayon Polymers 0.000 description 3
- 239000000156 glass melt Substances 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 229910021485 fumed silica Inorganic materials 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229940088594 vitamin Drugs 0.000 description 2
- 229930003231 vitamin Natural products 0.000 description 2
- 235000013343 vitamin Nutrition 0.000 description 2
- 239000011782 vitamin Substances 0.000 description 2
- 150000003722 vitamin derivatives Chemical class 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 1
- 229920001410 Microfiber Polymers 0.000 description 1
- 241000237536 Mytilus edulis Species 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003658 microfiber Substances 0.000 description 1
- 235000020638 mussel Nutrition 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000009461 vacuum packaging Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/164—Drying
Abstract
The invention discloses a production process method of a glass fiber fireproof heat-insulating core material, which belongs to the technical field of glass fiber processing, and utilizes the uniformly mixed polyvinyl alcohol water-soluble chopped fibers, chopped glass fibers and sodium silicate powder to prepare a fiber glue mixture, wherein the polyvinyl alcohol chopped fibers are firstly used as a soluble template to be uniformly mixed with the polyvinyl alcohol water-soluble chopped fibers, the chopped glass fibers and the solid sodium silicate powder, uniformly coated between glass fiber felts which are laminated at intervals to form a bonding effect through hot pressing, and then the polyvinyl alcohol is utilized to remove the polyvinyl alcohol after being heated by hot water to form a gap effect, so that the polyvinyl alcohol is removed.
Description
Technical Field
The invention belongs to the technical field of glass fiber processing, and particularly relates to a production process method of a glass fiber fireproof heat-insulating core material.
Background
The vacuum heat insulating plate is a high-efficiency heat insulating material prepared by filling a bearing core material in an aluminum-plastic composite gas barrier bag and vacuum packaging, and a getter can be added into the plate in order to maintain a good vacuum environment in the plate. And the heat transfer of the gas in the vacuum-pumping mode is eliminated, so that the heat conductivity coefficient of the vacuum-pumping type heat pump is reduced. Chinese patent CN106630651a discloses a glass fiber for manufacturing vacuum insulation panel core material, which reduces CaO, mgO, B 2 O 3 、Al 2O3 The oxide content, in fact the thermal conductivity of the core material, is not evident and does not give a specific method of manufacturing the fire-resistant insulating core material. The vacuum heat insulation plate adopts vacuum heat insulation raw materials and consists of 3 parts: the core material is a porous medium material, and the vacuum sealing membrane material for ensuring the vacuum degree in the plate can absorb various gases which enter the plate through the membrane material, and is a getter or a desiccant. In the prior art, glass fiber core materials are manufactured by a centrifugal blowing method technology, and a wet forming technology is adopted to prepare the glass fiber core materials. For example, (Xu T Z, chen Z F, zhou J M, et al Ultrafine glass fiber core material produced by wet method [ C)]v/Advanced Materials research Trans Tech Publications Ltd, 2012, 430:1343-1347.). The cost of manufacturing the core material accounts for more than 45% of the price of the vacuum insulation panel, so the price and manufacturing cost of the core material are also key for determining whether the vacuum insulation panel can be widely applied. At present, the foreign world mainly uses fumed silica as a core material, but the high price prevents the fumed silica from being practically applied in China, the wet-process glass fiber is mainly used in China, but the production process is complex, the environment is not protected, the product is not easy to degrade and is easy to damage human bodies, and the VIP is limited to be widely used in the field of heat preservation. Further, chinese patent CN201710609831.2 discloses that the glass fiber core material is respectively coated with high-strength continuous carbon fibers, and the glass fiber wires are bonded into an integral cable wire by cured high-temperature-resistant epoxy resinThe core material is not used for the insulation panel, but the bonding effect of the polymer resin is not used for the glass fiber of the insulation panel. Because the resin is not flame retardant, a large amount of toxic and harmful gases are generated after combustion. Chinese patent CN103274603a discloses a novel glass fiber and a vacuum insulation panel core material based on the glass fiber and a preparation method thereof, which adopts a dry process, and the glass melt is introduced into a centrifuge and rotated at a high speed, so that the glass melt is thrown out from the small holes on the side wall of the centrifuge to form glass trickles, thereby fiberizing the glass melt and limiting the component content of the glass fiber. The dry process or the wet process comprises the improvement of CN106630651A, CN103274603A and the like on the glass fiber component, the process is complex, the equipment cost is high, and the objective requirements of the price and the manufacturing cost of the core material raw material are not met. Those skilled in the art are required to develop a production process method of a glass fiber fireproof heat insulation core material to meet the existing application market and performance requirements.
Disclosure of Invention
In view of the above, the invention provides a production process method of a glass fiber fireproof heat-insulating core material.
A production process method of a glass fiber fireproof heat-insulating core material comprises the following steps:
the method comprises the steps of firstly, uniformly coating a fiber cement mixture by laminating needled glass fiber mats, and then pressing the mixture by hot cement, and fixing the mixture by using an iron wire screen clamp to obtain a chopped needled glass fiber mat rubber plate; wherein the fiber glue mixture comprises polyvinyl alcohol water-soluble chopped fibers, chopped glass fibers and solid sodium silicate powder which are uniformly mixed, and the coating amount of the fiber glue mixture is 420-450 g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the Step two, aging and gelling: placing the chopped-and-needled glass fiber mat adhesive plate obtained in the first step in a drying room with the relative humidity of 70% and the carbon dioxide content of 4% at 50 ℃ for 10 hours or placing the chopped-and-needled glass fiber mat adhesive plate in air with the room temperature relative humidity of 60% at room temperature for 15 days or uniformly blowing the surfaces of the chopped-and-needled glass fiber mat adhesive plate by using 45 ℃ carbon dioxide air pressure of 0.6MPa and blowing pressure of 0.35MPa, and maintaining the surface of the chopped-and-needled glass fiber mat adhesive plate for 100 seconds when in single-sided blowing; thirdly, glue discharging: aging and gelling fixed between iron wire screen clampsThe chopped glass fiber felt rubber plate is immersed in hot water at 95-100 ℃ and heated for 1-2 h, after polyvinyl alcohol is removed, an iron wire screen clamp is opened, and the chopped glass fiber felt rubber plate is taken out and air-dried at room temperature, so that the glass fiber felt rubber plate is obtained.
The glass fiber heat insulating board core material is a plate-shaped material which is used in a vacuum heat insulating board and is made of glass fiber and has certain supporting and heat insulating effects.
Core material is material placed in the insulating film bag to prevent plate collapse and reduce heat radiation
The glass fiber felt is a felt-like sheet paved by medium-grade fixed-length glass fibers, and is mainly used for coating materials such as emulsified asphalt or petroleum asphalt to be matched for building waterproof engineering.
The unit area mass of the glass fiber felt is preferably 250-600 g/m 2 For example, a mass per unit area of 450g/m 2 Alkali-free glass chopped strand mat EMC450-1600 mm in width.
Further, the fiber glue mixture in the first step can also comprise ferrosilicon powder, wherein the mass of the ferrosilicon powder is 3-5% of that of the solid sodium silicate.
Further, the step of laminating, after uniformly coating the fiber glue mixture, is specifically performed by hot glue pressing: spreading uniformly a layer of fiber glue mixture on the surface of a sizing and needling glass fiber mat by using a scraper, spreading a roll of non-sizing and needling glass fiber mat on the surface of the sizing and needling glass fiber mat, rolling in the radial direction by using a roller while spreading, coating a layer of fiber glue mixture, repeating the above operation for 2-4 times by using the scraper and the roller to prepare a laminated aggregate containing 3-5 layers of the needling glass fiber mat, and hot-pressing for 2-4 min at 220-230 ℃ under 0.3-0.4 MPa.
Further, the fiber glue mixture in the first step comprises 13-15 parts of polyvinyl alcohol water-soluble chopped fibers, 45-50 parts of chopped glass fibers and 13-17 parts of sodium silicate powder in parts by weight.
Further, the polyvinyl alcohol water-soluble chopped fiber is a polyvinyl alcohol water-soluble chopped fiber with a dissolution temperature of 1.56dtex multiplied by 38mm at 76-95 ℃.
Polyvinyl alcohol water-soluble short fiber polyvinyl alcohol fiber, after treatment, the fiber is dissolved in water to separate under a certain temperature condition, so as to achieve the effect of glue discharging. Meanwhile, the polyvinyl alcohol can be recycled after being concentrated, and the hot water can also be recycled.
The polyvinyl alcohol water-soluble short fiber is completely dissolved in a certain temperature and enough water.
Further, the chopped glass fibers have a length of 3 to 24mm and a diameter of 10 to 14 μm.
Further, the modulus of the sodium silicate powder is 3.1-3.4.
The invention has the beneficial effects that:
the invention utilizes the water-soluble chopped fiber of vinyl alcohol and chopped glass fiber and solid sodium silicate powder to mix uniformly to make the fibrous glue mixture, the chopped fiber of polyvinyl alcohol is regarded as the soluble template and chopped glass fiber and solid sodium silicate powder to mix uniformly at first, and form the bonding effect through the hot pressing between the glass fiber felts that the interval stacks through the uniform coating, form the chopped needled glass fiber felt offset plate, control appropriate temperature and process, the fibrous polyvinyl alcohol does not take place the great deformation, make the core material bond preliminary shaping; the solid sodium silicate, the chopped glass fibers and the glass fiber mats are fully reacted and gelled and bonded through an aging and gelling reaction, so that chemical bonding is formed between the glass fiber mats and the chopped glass fibers to form a laminated body with a plurality of angle arrangements, and at the moment, the chopped glass fiber mat adhesive plate has two bonding effects of inorganic and organic; and removing the adhesive by using the polyvinyl alcohol after heating the hot water to form a gap, and removing the polyvinyl alcohol to obtain the glass fiber fireproof heat insulation core material.
Compared with the prior art, the invention has the following advantages:
compared with the existing dry process or wet process, the production process has the advantages of less production steps, low equipment cost and simple operation, but the production process is simple and environment-friendly, does not harm human bodies, has excellent fireproof and flame-retardant properties, has excellent heat conductivity and flame retardance, can be used for preparing the vacuum glass fiber heat insulation board, has the characteristics of low quality and good high-temperature stability, has a laminated structure, has multiple angle arrangement of fibers, reduces the use of foaming plastics, even has no resin or other polymers in the glass fiber fireproof heat insulation core, reduces energy consumption, is environment-friendly, and has no harm to human bodies in the production and use processes.
Description of the embodiments
Examples
Preparing raw materials: polyvinyl alcohol water-soluble chopped fiber Ningxia earth circulation SW-9 qualified products 1.56dtex multiplied by 38mm, a mussel port Longquan silicon material LQ900 sodium silicate powder modulus 3.4, kunxin reaching ferrosilicon powder granularity 1mm, si+Fe more than or equal to 95% and Al less than or equal to 2%; c is less than or equal to 0.5 percent; p is less than or equal to 0.04 percent; s is less than or equal to 0.03%; si is more than or equal to 72 percent. The chopped glass fibers are WJ1001-103 fibers manufactured by Weijia composite materials Co., ltd, and have a nominal diameter of 10 μm, a chopped length of 18mm, a longitudinal breaking strength of 120N/150mm and a transverse breaking strength of 120N/150 mm.
The production process method for preparing the glass fiber fireproof heat-insulating core material by using the raw materials comprises the following steps:
the first step, after the needled glass fiber mat is laminated and uniformly coated with a fiber glue mixture, the mixture is subjected to hot glue pressing, and the method specifically comprises the following steps: spreading uniformly a layer of fiber glue mixture on the surface of a sizing and needling glass fiber mat by using a scraping plate, spreading a roll of non-sizing and needling glass fiber mat on the surface of the sizing and needling glass fiber mat, rolling by using a roller along the radial direction while spreading, coating a layer of fiber glue mixture, repeating the operations for 2 times by using the scraping plate and the roller to prepare a laminated aggregate containing 3 layers of the needling glass fiber mat, placing the laminated aggregate under the pressure of 0.4MPa at 230 ℃ for 4min, and fixing the laminated aggregate by using an iron wire screen clamp to obtain a chopped strand needling glass fiber mat glue plate; 15 parts of polyvinyl alcohol water-soluble chopped fibers, 50 parts of chopped glass fibers and 17 parts of sodium silicate powder, wherein the viscose mixture also comprises ferrosilicon powder, the mass of the ferrosilicon powder is 5 percent of that of solid sodium silicate, and the polyvinyl alcohol water-soluble chopped fibers, the chopped glass fibers, the solid sodium silicate powder and the ferrosilicon powder are uniformly mixed to prepare the viscose mixture, wherein the coating amount of the viscose mixture is 450g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the A second step of,Aging and gelling: placing the chopped glass fiber mat adhesive plate obtained in the first step in a drying room with the relative humidity of 70% and the carbon dioxide content of 4% at 50 ℃ for 10 hours; thirdly, glue discharging: and (3) immersing the aged and gelled chopped glass fiber mat rubber plate fixed between the iron wire screen clamps into hot water at 100 ℃ for heating for 2 hours, opening the iron wire screen clamps after polyvinyl alcohol is removed, taking out, and airing at room temperature to obtain the glass fiber mat rubber plate.
Product appearance: the surface of the core material is white, even and flat, has no impurity, and has no hard impurities such as glass filaments, bars and the like.
The product performance: the heat conductivity coefficient at 25 ℃ is 0.033W/(m.K), the water content is 0.45%, the slag ball content is 0.32%, the combustion performance is A2 grade, the compressive strength is 1.2MPa, and the surface density is 4.6 kg/square meter.
Examples
Preparing raw materials: polyvinyl alcohol water-soluble chopped fiber 1.56dtex×38mm Chongqing vitamin RS-9F qualified product, 3.1 sodium silicate-Huaibei new material company. The chopped glass fibers are WJ1001-101 fibers manufactured by Weijia composite materials Co., ltd, and have a nominal diameter of 10 μm, a chopping length of 4.5mm, a longitudinal breaking strength of 40N/150mm and a transverse breaking strength of 40N/150 mm.
The production process method for preparing the glass fiber fireproof heat-insulating core material by using the raw materials comprises the following steps:
the first step, after the needled glass fiber mat is laminated and uniformly coated with a fiber glue mixture, the mixture is subjected to hot glue pressing, and the method specifically comprises the following steps: spreading uniformly a layer of fiber glue mixture on the surface of a sizing and needling glass fiber mat by using a scraping plate, spreading a roll of non-sizing and needling glass fiber mat on the surface of the sizing and needling glass fiber mat, rolling by using a roller along the radial direction while spreading, coating a layer of fiber glue mixture, repeating the above operation for 4 times by using the scraping plate and the roller to obtain a laminated aggregate containing 5 layers of the needling glass fiber mat, placing the laminated aggregate under the pressure of 0.3MPa at 220 ℃ for 2min, and fixing by using an iron wire screen clamp to obtain a chopped strand needling glass fiber mat glue plate; 13 parts of polyvinyl alcohol water-soluble chopped fibers, 45 parts of chopped glass fibers and 13 parts of sodium silicate powder, wherein the fiber cement mixture comprises the polyvinyl alcohol water-soluble chopped fibers, the chopped glass fibers and solidsThe coating amount of the fiber cement mixture is 420g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the Step two, aging and gelling: the chopped and needled glass fiber felt rubber plate obtained in the first step is aged for 10 days in the air with the room temperature relative humidity of 50%; thirdly, glue discharging: and (3) immersing the aged and gelled chopped glass fiber mat rubber plate fixed between the iron wire screen clamps into hot water at 95 ℃ for heating for 1h, removing polyvinyl alcohol, opening the iron wire screen clamps, taking out, and airing at room temperature.
Product appearance: the surface of the core material is white, even and flat, has no impurity, and has no hard impurities such as glass filaments, bars and the like.
The product performance: the heat conductivity coefficient at 25 ℃ is 0.031W/(m.K), the water content is 0.43%, the slag ball content is 0.33%, the combustion performance is A2 grade, the compressive strength is 1.1MPa, and the surface density is 4.0 kg/square meter.
Examples
Polyvinyl alcohol water-soluble chopped fiber 1.56dtex×38mm Wanwei S-8 qualified product, sodium silicate-Huaibei Rong New Material Co. Preparing raw materials: 1.56dtex X38 mm Chongqing vitamin RS-9F qualified product, 3.4 sodium silicate-Huaibei new materials company. The chopped glass fibers are WJ1001-103 fibers manufactured by Weijia composite materials Co., ltd, and have a nominal diameter of 14 μm and an average chopping length of 30mm, bridge Qiong gas-industrial carbon dioxide, and an EMC-600 alkali-free glass fiber chopped mat with a longitudinal breaking strength of 150N/150mm and a transverse breaking strength of 150N/150 mm.
The production process method for preparing the glass fiber fireproof heat-insulating core material by using the raw materials comprises the following steps:
the first step, after the needled glass fiber mat is laminated and uniformly coated with a fiber glue mixture, the mixture is subjected to hot glue pressing, and the method specifically comprises the following steps: spreading the surface of the needled glass fiber felt with a scraper uniformly, coating a layer of fiber cement mixture, spreading the needled glass fiber felt which is not glued in a roll on the surface of the needled glass fiber felt which is ready for gluing, rolling with a roller along the radial direction while spreading, coating a layer of fiber cement mixture, repeating 6 layers of the operations with the scraper and the roller to obtain a laminated assembly containing 5 layers of needled glass fiber felt, hot-pressing for 3min at 230 ℃ under the pressure of 0.35MPa, and fixing with an iron wire screen clamp to obtain a chopped needled glass fiber feltGlass fiber felt rubber plate; 14 parts of polyvinyl alcohol water-soluble chopped fibers, 47 parts of chopped glass fibers and 15 parts of sodium silicate powder, wherein the fiber glue mixture comprises the polyvinyl alcohol water-soluble chopped fibers, the chopped glass fibers and solid sodium silicate powder which are uniformly mixed, and the coating amount of the fiber glue mixture is 450g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the Step two, aging and gelling: uniformly blowing the surfaces of the chopped-fiber needled glass fiber felt rubber plate obtained in the first step by using two surfaces of the chopped-fiber needled glass fiber felt rubber plate in sequence under the condition of using 45 ℃ carbon dioxide with the pressure of 0.6MPa and the blowing pressure of 0.35MPa, and maintaining the single-surface blowing for 100 seconds; thirdly, glue discharging: and (3) immersing the aged and gelled chopped glass fiber mat rubber plate fixed between the iron wire screen clamps into hot water at 100 ℃ for heating for 2 hours, opening the iron wire screen clamps after polyvinyl alcohol is removed, taking out, and airing at room temperature to obtain the glass fiber mat rubber plate.
Product appearance: the surface of the core material is white, even and flat, has no impurity, and has no hard impurities such as glass filaments, bars and the like.
The product performance: the heat conductivity coefficient at 25 ℃ is 0.031W/(m.K), the water content is 0.41%, the slag ball content is 0.35%, the combustion performance is A2 grade, the compressive strength is 1.4MPa, and the surface density is 5.1 kg/square meter.
Note that: the reference thermal conductivity is determined by a heat flow meter method for measuring steady-state thermal resistance and related characteristics of the heat insulating material of GB/T10295-2008. The slag ball content is regulated by JC/T978-2012 micro-fiber glass wool, the surface density is regulated by GB/T9914.3-2013 reinforced product test method part 3: measuring by a method for measuring the mass per unit area; the combustion performance is judged according to the specification of GB8624 of the combustion performance classification of building materials and products; 3 test samples of 40mm multiplied by 40mm are prepared for the nanometer microporous thermal insulation board, the test is carried out according to the GB/T5486-2008 rule, the three layers of nanometer microporous thermal insulation boards are overlapped, the thickness is compressed by 20%, and the test method of the GB/T5486-2008 inorganic hard thermal insulation product is referred.
In summary, the production process method of the glass fiber fireproof heat-insulating core material disclosed by the invention has the advantages of low cost, simplicity and convenience in operation and very good market practical prospect.
Claims (7)
1. The production process of the glass fiber fireproof heat-insulating core material is characterized by comprising the following steps:
the method comprises the steps of firstly, uniformly coating a fiber cement mixture by laminating needled glass fiber mats, and then pressing the mixture by hot cement, and fixing the mixture by using an iron wire screen clamp to obtain a chopped needled glass fiber mat rubber plate; wherein the fiber glue mixture comprises polyvinyl alcohol water-soluble chopped fibers, chopped glass fibers and solid sodium silicate powder which are uniformly mixed, and the coating amount of the fiber glue mixture is 420-450 g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the Step two, aging and gelling: placing the chopped-and-needled glass fiber mat adhesive plate obtained in the first step in a drying room with the relative humidity of 70% and the carbon dioxide content of 4% at 50 ℃ for 10 hours or placing the chopped-and-needled glass fiber mat adhesive plate in the air with the room temperature of 50% of the room temperature relative humidity for 10 days or uniformly blowing the surfaces of the chopped-and-needled glass fiber mat adhesive plate by using the carbon dioxide air pressure of 0.6MPa at 45 ℃ and the blowing pressure of 0.35MPa, and maintaining the surface of the chopped-and-needled glass fiber mat adhesive plate for 100 seconds when in single-sided blowing; thirdly, glue discharging: and (3) immersing the aged and gelled chopped glass fiber mat rubber plate fixed between the iron wire screen clamps into hot water at 95-100 ℃ for heating for 1-2 h, removing polyvinyl alcohol, opening the iron wire screen clamps, taking out, and airing at room temperature.
2. The method for producing a glass fiber fire-proof heat-insulating core material according to claim 1, wherein the fiber-cement mixture of the first step further comprises ferrosilicon powder, wherein the mass of the ferrosilicon powder is 3% -5% of that of solid sodium silicate.
3. The method for producing a glass fiber fire-proof heat-insulating core material according to claim 1, wherein the step of laminating, after uniformly coating the fiber-cement mixture, comprises the following steps: spreading the surface of the needled glass fiber felt with a scraper uniformly, coating a layer of fiber cement mixture, spreading the needled glass fiber felt which is not glued on the surface of the needled glass fiber felt to be glued, rolling with a roller while spreading, coating a layer of fiber cement mixture, repeating the above operation for 2-4 times with the scraper and the roller to obtain a laminated aggregate containing 3-5 layers of needled glass fiber felt, and hot-pressing for 2-4 min at 220-230 ℃ under 0.3-0.4 MPa.
4. The process for producing a glass fiber fireproof heat-insulating core material according to claim 1, wherein the fiber glue mixture of the first step comprises 13-15 parts by weight of polyvinyl alcohol water-soluble chopped fibers, 45-50 parts by weight of chopped glass fibers and 13-17 parts by weight of sodium silicate powder.
5. The process for producing a glass fiber fire-proof heat-insulating core material according to claim 1, wherein the polyvinyl alcohol water-soluble chopped fiber is a 1.56dtex x 38mm polyvinyl alcohol water-soluble chopped fiber with a dissolution temperature of 76-95 ℃.
6. The process for producing a glass fiber fire-proof and heat-insulating core material according to claim 1, wherein the length of the chopped glass fiber is 3-24 mm and the diameter is 10-14 μm.
7. The process for producing a glass fiber fire-proof heat-insulating core material according to claim 1, wherein the sodium silicate powder has a modulus of 3.1 to 3.4.
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