CN110777479A - Preparation method of glass fiber heat-insulating material - Google Patents
Preparation method of glass fiber heat-insulating material Download PDFInfo
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- CN110777479A CN110777479A CN201910957311.XA CN201910957311A CN110777479A CN 110777479 A CN110777479 A CN 110777479A CN 201910957311 A CN201910957311 A CN 201910957311A CN 110777479 A CN110777479 A CN 110777479A
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/413—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties containing granules other than absorbent substances
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4209—Inorganic fibres
- D04H1/4218—Glass fibres
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
- D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
- D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
- D04H1/645—Impregnation followed by a solidification process
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/02—Moisture-responsive characteristics
- D10B2401/021—Moisture-responsive characteristics hydrophobic
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a preparation method of a glass fiber heat-insulating material, which comprises the following steps: s1, slitting and opening; s2, cotton feeding; s3, paving cotton; s4, gluing; and S5, curing. According to the technical scheme provided by the invention, the recycled fiber material is used as a processing raw material, so that the cost of the glass fiber heat-insulating material is greatly reduced; the glass heat-insulating material prepared by the technical scheme of the invention has good sealing performance, and the fireproof and waterproof grades of the heat-insulating material are effectively improved, wherein the fireproof grade reaches A grade, and the waterproof grade is I grade.
Description
Technical Field
The invention belongs to the field of preparation of heat insulation materials, and particularly relates to a preparation method of a glass fiber heat insulation material.
Background
The glass fiber heat-insulating material has small volume weight, low heat conductivity, good performances of heat insulation, sound absorption, fire resistance, heat resistance, frost resistance, earthquake resistance, chemical stability and the like, convenient construction and low price, is widely used in the fields of pipelines, high-grade high-temperature vessels, external wall heat insulation, transportation, refrigerators, communication, aerospace and the like, and is also a preferred material for building energy conservation in the future.
The existing glass fiber heat-insulating material is mostly prepared by taking natural ores such as quartz sand, dolomite, wax stone and the like as main raw materials and adding other chemical raw materials such as soda ash, boric acid and the like to be melted into glass, and drawing, blowing or throwing into superfine fibrous materials by external force in a melting state.
With the widespread use of glass fiber materials, the disposal of waste glass fibers is becoming an increasingly serious problem. How to recycle the discarded glass fiber to solve the waste treatment problem of the discarded glass fiber, and simultaneously solve the problem that the existing glass fiber heat-insulating material is deficient in preparation principle, which becomes the problem to be solved urgently at present.
Disclosure of Invention
The invention aims to solve the technical problem of providing a glass fiber heat-insulating material and a preparation method thereof, which can effectively solve the problem of treatment of the existing waste glass fiber and can recycle the existing waste glass fiber.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the invention provides a preparation method of a glass fiber heat-insulating material, which comprises the following steps:
s1, slitting and opening: cutting the recovered glass fiber into glass fibers with preset sizes, then placing the cut glass fibers into an opening machine for treatment, and breaking the glass fiber groups into glass fiber blocks;
s2, cotton feeding: adding the filler into the glass fiber, and stirring to fully mix the glass fiber and the filler until the filler is uniformly dispersed in the glass fiber;
s3, cotton paving: modulating a belt production line at a preset feeding speed, transferring the glass fibers to the belt production line and flatly paving the glass fibers so that the glass fibers are uniformly distributed in a flat plate to reach a preset volume weight and thickness range;
s4, sizing: starting a sizing device, pre-loading a cementing material into the sizing device, and dispersing and arranging the cementing material in the glass fiber by using the sizing device;
s5, curing: opening the curing device, enabling the glued glass fibers to pass through the curing device at a first speed, and curing the glass fiber heat-insulating material dispersed with the cementing material to obtain a glass fiber heat-insulating material;
further, the curing device is a heating drying tunnel;
further, the curing mode is heating curing;
further, the heating temperature range of the drying tunnel is 80-160 ℃;
further, the first speed has a speed range of 10-30 meters/minute;
further, the dispersion mode of the cementing material is mist spraying;
further, the volume weight range is 20-200 g/m, and the thickness range is 1-10 mm.
Further, the cementing material is selected from one of resin powder, asphalt, cement, gypsum and lime;
further, the filling material comprises one or more of perlite powder, diatomite, bentonite and clay;
further, the preparation method further comprises a thickness fixing process and a slitting process, wherein the slitting process is arranged after the thickness fixing process, and the slitting process is finished by a splitting machine.
Due to the implementation of the technical scheme, compared with the prior art, the invention has the following advantages: the recycled glass fiber material is adopted as a processing raw material, and is prepared into the glass fiber heat-insulating material through the steps of slitting, opening, cotton feeding, cotton paving, gluing and curing, so that the cost of the glass fiber heat-insulating material is greatly reduced; the process flow provided by the invention has good sealing performance, and effectively improves the fireproof and waterproof grades of the heat-insulating material, wherein the fireproof grade reaches A grade, and the waterproof grade is I grade.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a process flow diagram of a method for preparing a glass fiber thermal insulation material in an embodiment of the invention.
Detailed Description
The following description of embodiments of the invention is provided in connection with the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the respective embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The preparation method of the invention is described in detail below with reference to the accompanying drawings:
example 1
As shown in fig. 1, the main process flow for preparing the glass fiber thermal insulation material is as follows: s1, slitting and opening: weighing a certain weight of recycled glass fiber by using an electronic scale, and cutting the recycled glass fiber into preset sizes by using a cutting machine, wherein the main purpose is to cut the recycled glass fiber into sizes which can be processed by a separating machine; adding the cut recycled glass fiber into a clearing machine, and opening the recycled glass fiber material by using the clearing machine, namely tearing large blocks of the recycled glass fiber agglomerates into small blocks and small bundles of the recycled glass fiber, wherein the purpose of the method is to loosen, loosen and remove impurities; s2, cotton feeding: adding a certain weight of perlite powder into the recovered glass fiber, and stirring to fully mix the recovered glass fiber and the perlite powder until the perlite powder is uniformly dispersed in the recovered glass fiber; s3, cotton paving: regulating the belt production line to a preset feeding speed, transferring the uniformly dispersed recovered glass fibers to the belt production line and flatly paving the glass fibers to ensure that the volume weight of the glass fibers reaches 150kg/m
3(ii) a S4, sizing: putting phenolic resin into a sizing device in advance, and then dispersing and arranging the phenolic resin on the recycled glass fiber through the sizing device; s5, curing: and starting a drying tunnel heating device to heat the glued glass fibers, wherein the length of the drying tunnel is 30 meters, the temperature in the drying tunnel is 80 ℃, and the passing speed of the glass fibers in the drying tunnel is 10 m/min. After the curing process, the method also comprises a thickness fixing and cutting process, wherein the thickness fixing process is mainly used for fixing the cured glass through a thickness fixing deviceThe thickness of the fiber heat-insulating material is adjusted to meet the requirements of customers; the cutting process mainly cuts the glass fiber heat-insulating material after the fixed thickness through the cutting device, and the glass fiber heat-insulating material can be cut into various sizes according to the size required by a customer. The glass fiber thermal insulation material prepared by the method is subjected to standard fire prevention and water prevention grade tests, wherein the water prevention grade is A grade, and the water prevention grade is I grade.
Example 2
As shown in fig. 1, the main process flow for preparing the glass fiber thermal insulation material is as follows: s1, slitting and opening: weighing a certain weight of recycled glass fiber by using an electronic scale, cutting the recycled glass fiber into preset sizes by using a splitting machine, mainly aiming at cutting the recycled glass fiber into sizes which can be processed by a clearing machine, then adding the cut recycled glass fiber into the clearing machine, opening the recycled glass fiber material by using the clearing machine, pulling and scattering large blocks of recycled glass fiber blocks into small blocks and small bundles of recycled glass fiber, and mainly aiming at loosening, loosening and removing impurities; s2, cotton feeding: adding diatomite and bentonite into the recovered glass fiber, and stirring to fully mix the recovered glass fiber with the diatomite and the bentonite until the diatomite and the bentonite are uniformly dispersed in the recovered glass fiber; s3, cotton paving: regulating the belt production line to a preset feeding speed, transferring the uniformly dispersed recovered glass fibers to the belt production line and flatly paving the glass fibers to ensure that the volume weight of the glass fibers reaches 150kg/m
3(ii) a S4, sizing: putting phenolic resin with a certain weight into a sizing device in advance, and then dispersing and arranging the phenolic resin on the recycled glass fiber through the sizing device; s5, curing: and (3) starting a drying tunnel heating device to heat and solidify the glued recycled glass fiber to obtain the glass fiber heat-insulating material, wherein the length of the drying tunnel is 30 meters, the temperature in the drying tunnel is 120 ℃, and the passing speed of the glass fiber in the drying tunnel is 20 m/min. After the curing process, the method also comprises a thickness fixing and cutting process, wherein the thickness fixing process is mainly used for adjusting the thickness of the cured glass fiber heat-insulating material through a thickness fixing device so as to meet the requirements of customers; the cutting process mainly cuts the glass fiber heat-insulating material with the fixed thickness through the cutting device according to the clientThe required size can be cut into various sizes. The glass fiber thermal insulation material prepared by the method is subjected to standard fire prevention and water prevention grade tests, wherein the water prevention grade is A grade, and the water prevention grade is I grade.
Example 3
As shown in fig. 1, the main process flow for preparing the glass fiber thermal insulation material is as follows: s1, slitting and opening: weighing a certain weight of recycled glass fiber by using an electronic scale, and cutting the recycled glass fiber into preset sizes by using a cutting machine so that the cut proportional fiber can be treated by a cleaning machine; the cut recycled glass fiber enters a clearing machine, the clearing machine is utilized to open recycled glass fiber materials, large blocks of recycled glass fiber agglomerates are broken into small blocks and small bundles of recycled glass fiber, and the purpose is mainly to loosen, loosen and remove impurities; s2, cotton feeding: adding argil into the recovered glass fibers, and stirring to fully mix the recovered glass fibers with the argil until the argil is uniformly dispersed in the recovered glass fibers; s3, cotton paving: regulating a belt production line to a preset feeding speed, transferring the uniformly dispersed recycled glass fibers to the belt production line and flatly paving the glass fibers to ensure that the volume weight of the recycled glass fibers reaches 150kg/m
3(ii) a S4, sizing: putting phenolic resin into a sizing device in advance, and then dispersing and arranging the phenolic resin on the recycled glass fiber through the sizing device; s5, curing: and (3) starting a drying tunnel heating device, heating and curing the glued recycled glass fiber to obtain the glass fiber heat-insulating material, wherein the length of the drying tunnel is 30 meters, the temperature in the drying tunnel is 120 ℃, and the movement speed of the glass fiber in the drying tunnel is 10 m/min. After the curing process, the method also comprises a thickness fixing and cutting process, wherein the thickness fixing process is mainly used for adjusting the thickness of the cured glass fiber heat-insulating material through a thickness fixing device so as to meet the requirements of customers; the cutting process mainly cuts the glass fiber heat-insulating material after the fixed thickness through the cutting device, and the glass fiber heat-insulating material can be cut into various sizes according to the size required by a customer. The glass fiber thermal insulation material prepared by the method is subjected to standard fire prevention and water prevention grade tests, wherein the water prevention grade is A grade, and the water prevention grade is I grade.
Example 4
As shown in fig. 1, the main process flow for preparing the glass fiber thermal insulation material is as follows: s1, slitting and opening: weighing a certain weight of recovered glass fiber by using an electronic scale, and cutting the recovered glass fiber into preset sizes by using a cutting machine so that the cut recovered glass fiber can be treated by a cleaning machine; the cut recycled glass fiber enters a clearing machine, the clearing machine is utilized to open recycled glass fiber materials, large blocks of recycled glass fiber agglomerates are broken into small blocks and small bundles of recycled glass fiber, and the purpose is mainly to loosen, loosen and remove impurities; s2, cotton feeding: adding filling materials of perlite powder and argil into the recovered glass fiber, and stirring to fully mix the recovered glass fiber with the perlite powder and the argil until the perlite powder and the argil are uniformly dispersed in the glass fiber; s3, cotton paving: adjusting the belt production line to a preset feeding speed, transferring the uniformly dispersed glass fibers to the belt production line and flatly paving the glass fibers to ensure that the volume weight of the recovered glass fibers reaches 150kg/m
3(ii) a S4, sizing: weighing phenolic resin with a certain weight, putting the phenolic resin into a gluing device in advance, and then dispersing and arranging the phenolic resin on the recycled glass fiber through the gluing device; s5, curing: and starting a drying tunnel heating device, and heating the glued recycled glass fiber to obtain the glass fiber heat-insulating material, wherein the length of the drying tunnel is 30 meters, the temperature in the drying tunnel is 160 ℃, and the movement speed of the recycled glass fiber in the drying tunnel is 10 m/min. After the curing process, the method also comprises a thickness fixing and cutting process, wherein the thickness of the cured recycled glass fiber heat-insulating material is mainly adjusted by a thickness fixing device in the thickness fixing process so as to meet the requirements of customers; the cutting process mainly cuts the glass fiber heat-insulating material after the fixed thickness through the cutting device, and the glass fiber heat-insulating material can be cut into various sizes according to the size required by a customer. The glass fiber thermal insulation material prepared by the method is subjected to standard fire prevention and water prevention grade tests, wherein the water prevention grade is A grade, and the water prevention grade is I grade.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (10)
1. The preparation method of the glass fiber heat-insulating material is characterized by comprising the following steps:
s1, slitting and opening: cutting the recovered glass fiber into glass fibers with preset sizes, then placing the cut glass fibers into an opening machine for treatment, and breaking the glass fiber groups into glass fiber blocks;
s2, cotton feeding: adding a filler into the glass fiber, and stirring to fully mix the glass fiber and the filler until the mixture is uniformly dispersed in the glass fiber;
s3, cotton paving: modulating a belt production line at a preset feeding speed, transferring the glass fibers to the belt production line and flatly paving the glass fibers so that the glass fibers are uniformly distributed in a flat plate to reach a preset volume weight and thickness;
s4, sizing: starting a sizing device, pre-loading a cementing material into the sizing device, and dispersing and arranging the cementing material in the laid glass fibers by using the sizing device;
s5, curing: and opening the curing device, enabling the glued glass fibers to pass through the curing device at a first speed, and curing the glass fiber heat-insulating material dispersed with the cementing material to obtain the glass fiber heat-insulating material.
2. The method of claim 1, wherein the curing device is a heating tunnel.
3. The method according to claim 2, wherein the curing means is heat curing.
4. The method of claim 3, wherein the tunnel is heated to a temperature in the range of 80 to 160 ℃.
5. The method of claim 4, wherein the first speed is in a range of 10-30 meters/minute.
6. The method of claim 5, wherein the cementitious material is dispersed by mist spray.
7. The method of claim 6, wherein the volume weight is in the range of 20 to 200 grams per square meter and the thickness is in the range of 1 to 10 mm.
8. The method of claim 7, wherein the cementitious material is selected from one of resin, asphalt, cement, gypsum, and lime.
9. The method of claim 8, wherein the filler material comprises one or more of perlite powder, diatomaceous earth, bentonite, and clay.
10. The manufacturing method of claim 1, further comprising a set-thickness process and a slitting process, the slitting process being provided after the set-thickness process, the slitting process being performed by a slitting machine.
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| CN201910957311.XA CN110777479A (en) | 2019-10-10 | 2019-10-10 | Preparation method of glass fiber heat-insulating material |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002265634A (en) * | 2001-03-12 | 2002-09-18 | Shin Kobe Electric Mach Co Ltd | Glass fiber nonwoven fabric for electric insulation, composite laminate and printed circuit board |
| CN1900203A (en) * | 2005-07-08 | 2007-01-24 | 罗门哈斯公司 | Water repellant curable aqueous compositions |
| CN103306048A (en) * | 2012-03-07 | 2013-09-18 | 福建赛特新材股份有限公司 | Fiber mat, preparation method and core material for vacuum thermal insulation plate |
| CN103388240A (en) * | 2012-05-08 | 2013-11-13 | 旭泰玻璃纤维股份有限公司 | Production method for glass fiber texture |
| CN103541151A (en) * | 2012-07-16 | 2014-01-29 | 苏州维艾普新材料有限公司 | Light super fine glass wool non-woven felt and manufacturing method thereof |
| CN106759990A (en) * | 2016-12-13 | 2017-05-31 | 无锡市明江保温材料有限公司 | A kind of preparation method of pyroceram cotton heat-insulating shield |
| CN108978039A (en) * | 2018-08-20 | 2018-12-11 | 成都硕屋科技有限公司 | A kind of insulation fibre felt and its preparation process |
-
2019
- 2019-10-10 CN CN201910957311.XA patent/CN110777479A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002265634A (en) * | 2001-03-12 | 2002-09-18 | Shin Kobe Electric Mach Co Ltd | Glass fiber nonwoven fabric for electric insulation, composite laminate and printed circuit board |
| CN1900203A (en) * | 2005-07-08 | 2007-01-24 | 罗门哈斯公司 | Water repellant curable aqueous compositions |
| CN103306048A (en) * | 2012-03-07 | 2013-09-18 | 福建赛特新材股份有限公司 | Fiber mat, preparation method and core material for vacuum thermal insulation plate |
| CN103388240A (en) * | 2012-05-08 | 2013-11-13 | 旭泰玻璃纤维股份有限公司 | Production method for glass fiber texture |
| CN103541151A (en) * | 2012-07-16 | 2014-01-29 | 苏州维艾普新材料有限公司 | Light super fine glass wool non-woven felt and manufacturing method thereof |
| CN106759990A (en) * | 2016-12-13 | 2017-05-31 | 无锡市明江保温材料有限公司 | A kind of preparation method of pyroceram cotton heat-insulating shield |
| CN108978039A (en) * | 2018-08-20 | 2018-12-11 | 成都硕屋科技有限公司 | A kind of insulation fibre felt and its preparation process |
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Application publication date: 20200211 |