CN105401422A - Impregnating compound and application thereof in production of non-alkali bulked glass fiber yarn - Google Patents
Impregnating compound and application thereof in production of non-alkali bulked glass fiber yarn Download PDFInfo
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- CN105401422A CN105401422A CN201510745854.7A CN201510745854A CN105401422A CN 105401422 A CN105401422 A CN 105401422A CN 201510745854 A CN201510745854 A CN 201510745854A CN 105401422 A CN105401422 A CN 105401422A
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- sizing agent
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/50—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with organometallic compounds; with organic compounds containing boron, silicon, selenium or tellurium atoms
- D06M13/51—Compounds with at least one carbon-metal or carbon-boron, carbon-silicon, carbon-selenium, or carbon-tellurium bond
- D06M13/513—Compounds with at least one carbon-metal or carbon-boron, carbon-silicon, carbon-selenium, or carbon-tellurium bond with at least one carbon-silicon bond
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
- D06M13/46—Compounds containing quaternary nitrogen atoms
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/227—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/55—Epoxy resins
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
Abstract
The invention discloses an impregnating compound and an application thereof in production of a non-alkali bulked glass fiber yarn. The impregnating compound is prepared from the following raw materials: a coupling agent, a lubricating agent, a film-forming agent, a surfactant, a pH value regulator and deionized water, wherein the solid mass of the impregnating compound accounts for 3%-10%of total mass of the impregnating compound; the balance is water; a silane coupling agent is adopted as the coupling agent; a water-soluble organic compound is adopted as the lubricating agent; the film-forming agent is a mixture of an epoxy emulsion and a polypropylene emulsion; the surfactant is a cationic surfactant; and the pH regulator is an acid. A non-alkali direct glass yarn produced by the impregnating compound is applicable to being used as the non-alkali bulked glass fiber yarn, and is high in expansion rate, good in compatibility with target resin and good in permeability; the mechanical property of a product can be high; and the standard requirements are met.
Description
(1) technical field
The present invention relates to a kind of glass-fiber reinforced thermo-setting resin technology, particularly a kind of sizing agent and producing the application in alkali-free glass fibre varicosity yarn.
(2) background technology
Bulked glass yarn adopts glass fiber bulk strand yarn to form through the special device that passes into pressure-air is expanded, although operation is also uncomplicated, but impart effect that glass fibre is special, it has the high strength of continuous fiber and the bulkiness of staple fibre concurrently, is a kind of high temperature resistant, low thermal conductivity, corrosion-resistant, high harmless new material holding empty amount, filtration efficiency.
Because of the peculiar advantage of bulked glass yarn in performance, be widely used in the Application Areass such as automobile, building, insulation, sound insulation.Such as clutch disc, muffler, thermostable heat insulation material, the body of wall wall cloth of building field.Wide in range Application Areas, imparts the market prospects that bulked glass yarn product is huge.Along with the development of global economy and composite industry, under the stimulation of the macro policies such as country's " tune structure ", such as automobile, architectural shape, the high-end field development such as high temperature resistant will be placed in more outstanding position.Along with the development of composite application technology, bulk yarn Application Areas has had again new expansion, such as in drawing and extruding section bar, the particularly position of structure and surface complexity, the introducing of bulk yarn can increase the suction glue amount of fiber, ensure to obtain good filling at some labyrinth places of goods, thus promote quality and the mechanical strength of product surface.
Meet the performance requirement of above bulk yarn, generally to glass fiber bulk strand with yarn performance requirement following (adopt unsaturated polyester resin, content of glass fiber is 75%, for 600tex):
● performance indications:
| Test event | Shear strength | Expansion rate |
| ≥40MPa | 3％-5％ |
The test of woven glass roving fabric impregnation sample shear shearing stress: method is shown in ASTMD2344 and describes, and instrument and equipment comprises gumming device, tensile force machine, fixture etc., reference standard ASTMD2344.
Bulked glass yarn expansion rate test: test expanded before line density T1, test expanded after line density T2, calculate (T2-T1)/T1*100%, be expansion rate.
Adopting under the prerequisite that E glass ingredient is constant for this reason, need by developing a kind of novel sizing agent: reach good expansion effect, the fiber after namely expanded can fully and evenly scatter, and expansion rate is high.The compatibility requirements of product and resin is good simultaneously, to meet the requirement of end article mechanical property.
(3) summary of the invention
Technical problem to be solved by this invention is to provide a kind of sizing agent and application thereof, the direct yarn of the alkali-free glass adopting this sizing agent to produce is suitable as alkali-free glass fibre varicosity yarn, not only expansion rate is high, good with target resin compatible, soak into, and the mechanical performance of goods can be made high, meet the requirement of standard.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
The invention provides a kind of sizing agent, the raw materials of described sizing agent comprises coupling agent, lubricant, film forming agent, surfactant, pH value regulator and deionized water, the solid masses (namely solid masses dries the quality of rear remainder) of described sizing agent accounts for 3 ~ 10% of sizing agent gross mass, and surplus is water (water comprising raw material components its own band adds the deionized water that preparation sizing agent adds); Described coupling agent adopts silane coupler; Described lubricant adopts water-soluble organic compounds; Described film forming agent is the blend of epoxy emulsion and polypropylene emulsion; Described surfactant is cationic surfactant; Described pH adjusting agent is acid; The percentage that the quality consumption of following ingredients accounts for sizing agent solid masses is expressed as follows, if component adds with the form of dispersion, then its quality consumption is in its solid masses:
Further, the preferred described sizing agent of the present invention is made up of coupling agent, lubricant, film forming agent, surfactant, pH value regulator and deionized water.
Further, the percentage that the quality consumption of the preferred each component of the present invention accounts for sizing agent solid masses is expressed as follows:
Further, to account for the percentage of sizing agent solid masses as follows for the quality consumption of the preferred each component of the present invention:
Again further, to account for the percentage of sizing agent solid masses as follows for the quality consumption of the preferred each component of the present invention:
The pH value of sizing agent of the present invention is 2 ~ 10, and preferable ph is 3 ~ 7.
Coupling agent of the present invention generally adopts the combination of one or more in the silane based coupling agents of band epoxy radicals, acryloxy, vinyl or amino, the available product grade of the silane coupler that the present invention is suitable for has A-172, A-174, A-1100, A-187 etc., preferable methyl acryloxypropyl trimethoxysilane coupling agent, i.e. A-174.The use of coupling agent; impaired in drawing process of fiber can be protected; and " bridge joint " effect played between glass fibre and matrix resin; therefore be the key affecting glass fiber strength and glass fiber reinforced plastics product intensity; suitable coupling agent is selected, and the product produced can be made to have better mechanical performance.In the present invention, the quality consumption of silane coupler accounts for the percentage of sizing agent solid masses is 3 ~ 15%, preferably 4 ~ 14%, more preferably 6 ~ 12%, further preferably 8 ~ 10%.
The lubricant that the present invention uses can adopt water miscible organic compound, adopts the one in silicone oil, PEG series lubricant agent, preferred silicone oil.The use of lubricant is mainly and meets the lubricant effect of glass fibre in wire drawing, post processing, use procedure, but too much lubricant can affect the convergence of glass fiber yarn, and the mechanical performance of final glass fiber reinforced plastics product can be affected, therefore the percentage that the quality consumption of lubricant described in the present invention accounts for sizing agent solid masses is 4 ~ 18%, preferably 5 ~ 16%, more preferably 7 ~ 14%, further preferably 9 ~ 11%.
The surfactant that the present invention uses is cationic surfactant, adopts the one in Fixanol, quaternary ammonium salt, amine salt, preferred quaternary cationic surfactant, most preferably organic quaternary ammonium salt 1831.The percentage that the quality consumption of preferred cationic surfactant of the present invention accounts for sizing agent solid masses is 0.1 ~ 10%, preferably 1.5 ~ 9.5%, more preferably 3 ~ 8%, further preferably 4.5 ~ 6%.
Film forming agent plays protection fiber as the main component of sizing agent, meets the quantity-produced effect of fiber, and plays conclusive impact to the mechanical strength of glass fibre end article, and therefore, the selection of film forming agent is emphasis of the present invention.The combination that the film forming agent that the present invention uses is epoxy emulsion and polypropylene emulsion.The present invention adopts dissimilar emulsion collocation to use, and being the expansion effect in order to enable glass fibre reach good on the one hand, is to make the compatibility of glass fiber product and resin good, to meet the requirement of end article mechanical property on the other hand.The percentage that the gross mass consumption of film forming agent of the present invention accounts for sizing agent solid masses is 60 ~ 85%, preferably 64 ~ 80%, and be more preferably 67 ~ 77%, be further preferably 69 ~ 75%.
The epoxy emulsion that the present invention uses is water-soluble epoxy resin emulsion or bisphenol A type epoxy resin emulsion, and molecular weight is 200 ~ 1200, is preferably the scope of 300 ~ 800, particle diameter of dispersing phase 0.2 ~ 2.0 μm.In the present invention, epoxy emulsion can be prepared voluntarily according to existing document or use commercial goods.The percentage that the quality consumption of described epoxy emulsion accounts for sizing agent solid masses is 40 ~ 68%, preferably 40 ~ 65%, more preferably 44 ~ 60%, further preferably 48 ~ 56%
The polypropylene emulsion that the present invention uses is aqueous polyacrylamide emulsion, and molecular weight is 10000 ~ 20000, is preferably the scope of 13000 ~ 18000, particle diameter of dispersing phase 0.2 ~ 2.0 μm.In the present invention, polypropylene emulsion can be prepared voluntarily according to existing document or use commercial goods.The percentage that the quality consumption of described polypropylene emulsion accounts for sizing agent solid masses is 12 ~ 25%, preferably 15 ~ 24%, more preferably 17 ~ 23%, further preferably 18 ~ 21%.
PH adjusting agent of the present invention adopts acid, and organic acid or inorganic acid, as used citric acid, acetic acid, formic acid, acetic acid etc.The effect of pH adjusting agent is mainly used for ancillary coupling agent dispersion and regulate the pH value of the sizing agent prepared, and the pH value of sizing agent of the present invention is 2 ~ 10, and preferable ph is 3 ~ 7.
The compound method of sizing agent of the present invention adopts conventional method, comprise the following steps: the deionized water adding 40% ~ 50% of total amount in a clean container, and then the pH adjusting agent added in sizing agent composition, abundant stirring is after 3 ~ 5 minutes, slowly add the silane coupler in sizing agent composition again, Keep agitation 40 ~ 50 minutes; Lubricant in sizing agent composition, surfactant add container after abundant agitation and dilution at 5 times in the warm deionized water (40 ~ 50 DEG C) of its amount; In sizing agent composition, film forming agent adds container after adopting the water of 2 times of film forming dosage to dilute, if sizing agent pH value can not reach optimum range, adds appropriate pH adjusting agent and carries out adjusting and stirring, until pH value reaches optimum range.
The invention provides described sizing agent and produce the application in alkali-free glass fibre varicosity yarn.
Combustible content (namely the coated amount on the glass fibers of sizing agent accounts for the ratio of the glass fiber quality) general control of glass fibre of the present invention is 0.2 ~ 0.8%, and concrete value needs to determine according to the performance of raw material itself.The performance indications reached from product needed and experimental results, the product that combustible content is produced 0.3 ~ 0.6% time, mechanical strength and expansion rate can meet the demands.
Compared with prior art, sizing agent of the present invention can make the expansion rate of glass fiber product high, and, good penetrability good with resin compatible, the mechanical performance of goods is high, thus meets market and application demand.
(4) detailed description of the invention
By the following examples the present invention is specifically described, but content of the present invention is not by any restriction of following examples.
The each component of sizing agent that the embodiment of the present invention uses is as follows:
Described coupling agent uses methacryloxypropyl trimethoxy silane coupling agent, and product grade is A-174;
Described lubricant uses silicone oil;
Described film forming agent epoxy resin latex, product grade is DSMJS129 (manufacturer: Dutch DSM N. V.);
Described film forming agent polypropylene emulsion, product grade is MichemEmulsion42035A (manufacturer: MICHELMAN, solid content 34.5 ~ 35.5%, pH:3.5 ~ 6.5);
Described cationic surfactant adopts organic quaternary ammonium salt 1831;
Described pH value regulator adopts acetic acid.
Following table 1 is concrete formulation examples and the concrete test result of the direct yarn of 600Tex produced according to certain glass fibre production technology.In the embodiment of the present invention, the content of water accounts for 94% of sizing agent gross mass, and numerical value is wherein each component accounts for sizing agent solid masses percentage in its solid content.
Table 1
From above formula test case, we can therefrom find out, by the design to component and constituent content, we can obtain the sizing agent meeted the requirements, wherein especially better with example 3,4 effect.Below be only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a sizing agent, the raw materials of described sizing agent comprises coupling agent, lubricant, film forming agent, surfactant, pH value regulator and deionized water, and the solid masses of described sizing agent accounts for 3 ~ 10% of sizing agent gross mass, and surplus is water; Described coupling agent adopts silane coupler; Described lubricant adopts water-soluble organic compounds; Described film forming agent is the blend of epoxy emulsion and polypropylene emulsion; Described surfactant is cationic surfactant; Described pH adjusting agent is acid; The percentage that the quality consumption of following ingredients accounts for sizing agent solid masses is expressed as follows, if component adds with the form of dispersion, then its quality consumption is in its solid masses:
2. the sizing agent of alkali-free glass fibre varicosity yarn as claimed in claim 1, is characterized in that: described sizing agent is made up of coupling agent, lubricant, film forming agent, surfactant, pH value regulator and deionized water.
3. sizing agent as claimed in claim 1 or 2, is characterized in that: the percentage that the quality consumption of each component accounts for sizing agent solid masses is as follows:
4. sizing agent as claimed in claim 3, is characterized in that: the percentage that the quality consumption of each component accounts for sizing agent solid masses is as follows:
5. sizing agent as claimed in claim 4, is characterized in that: the percentage that the quality consumption of each component accounts for sizing agent solid masses is as follows:
6. the sizing agent as described in one of Claims 1 to 5, is characterized in that: described silane coupler is the combination of one or more of the silane based coupling agents of band epoxy radicals, acryloxy, vinyl or amino.
7. sizing agent as claimed in claim 6, is characterized in that: described silane coupler is methacryloxypropyl trimethoxy silane coupling agent.
8. the sizing agent as described in one of claim 1 ~ 7, is characterized in that: described epoxy emulsion is water-soluble epoxy resin emulsion or bisphenol A type epoxy resin emulsion, and molecular weight is 200 ~ 1200, particle diameter of dispersing phase 0.2 ~ 2.0 μm; Described polypropylene emulsion is aqueous polyacrylamide emulsion, and molecular weight is 10000 ~ 20000, particle diameter of dispersing phase 0.2 ~ 2.0 μm.
9. the sizing agent as described in one of claim 1 ~ 8, is characterized in that: described lubricant adopts the one in silicone oil, PEG series lubricant agent; Described cationic surfactant adopts the one in Fixanol, quaternary ammonium salt, amine salt.
10. sizing agent as claimed in claim 1 is producing the application in alkali-free glass fibre varicosity yarn.
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| CN201510745854.7A CN105401422B (en) | 2015-11-04 | 2015-11-04 | A kind of size and its application in alkali-free glass fibre varicosity yarn is produced |
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| CN201510745854.7A CN105401422B (en) | 2015-11-04 | 2015-11-04 | A kind of size and its application in alkali-free glass fibre varicosity yarn is produced |
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| CN105401422B CN105401422B (en) | 2018-06-26 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106283316A (en) * | 2016-08-31 | 2017-01-04 | 巨石集团有限公司 | A kind of preparation method of high-strength pultrusion bulked glass yarn |
| CN106630683A (en) * | 2016-12-07 | 2017-05-10 | 巨石集团有限公司 | Impregnating compound for alkali-free glass fiber rough yarn for strengthened PP or PBT |
| CN108996923A (en) * | 2017-06-07 | 2018-12-14 | 巨石集团有限公司 | A kind of high immersion LFT reinforced polypropylene e-glass fiber infiltrant and its application |
| CN111051602A (en) * | 2017-08-29 | 2020-04-21 | 三井化学株式会社 | Fiber bundling agent, inorganic reinforcing material, resin composition and molded body |
| CN112458586A (en) * | 2020-12-14 | 2021-03-09 | 东台市华阳玻纤有限责任公司 | Method for manufacturing core yarn pre-bulked core-spun yarn for asbestos-free brake band |
| CN115124262A (en) * | 2022-08-25 | 2022-09-30 | 淄博卓意玻纤材料有限公司 | Glass fiber impregnating compound for milk bottle |
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| JPS63230543A (en) * | 1987-03-19 | 1988-09-27 | Nippon Glass Fiber Co Ltd | Glass fiber sizing agent composition for reinforcing glass fiber |
| CN101343396A (en) * | 2008-08-18 | 2009-01-14 | 巨石集团有限公司 | Glass fiber reinforced acetal resin composite material |
| CN102978938A (en) * | 2012-11-29 | 2013-03-20 | 山东玻纤复合材料有限公司 | Special impregnating compound for glass fiber swelled yarn and preparation method thereof |
| CN103570255A (en) * | 2012-08-07 | 2014-02-12 | 重庆国际复合材料有限公司 | Glass fiber infiltrating agent composition as well as preparation method and application thereof |
| CN104030577A (en) * | 2014-05-29 | 2014-09-10 | 巨石集团有限公司 | Infiltration agent of chopped glass fiber for reinforcing cement |
| CN104045244A (en) * | 2014-05-29 | 2014-09-17 | 巨石集团有限公司 | Alkali-free direct roving impregnating compound for continuous fiber reinforced polyolefin |
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2015
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Patent Citations (6)
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| JPS63230543A (en) * | 1987-03-19 | 1988-09-27 | Nippon Glass Fiber Co Ltd | Glass fiber sizing agent composition for reinforcing glass fiber |
| CN101343396A (en) * | 2008-08-18 | 2009-01-14 | 巨石集团有限公司 | Glass fiber reinforced acetal resin composite material |
| CN103570255A (en) * | 2012-08-07 | 2014-02-12 | 重庆国际复合材料有限公司 | Glass fiber infiltrating agent composition as well as preparation method and application thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106283316A (en) * | 2016-08-31 | 2017-01-04 | 巨石集团有限公司 | A kind of preparation method of high-strength pultrusion bulked glass yarn |
| CN106630683A (en) * | 2016-12-07 | 2017-05-10 | 巨石集团有限公司 | Impregnating compound for alkali-free glass fiber rough yarn for strengthened PP or PBT |
| CN108996923A (en) * | 2017-06-07 | 2018-12-14 | 巨石集团有限公司 | A kind of high immersion LFT reinforced polypropylene e-glass fiber infiltrant and its application |
| CN108996923B (en) * | 2017-06-07 | 2021-07-27 | 巨石集团有限公司 | High-impregnation alkali-free glass fiber impregnating compound for LFT (Long fiber reinforced thermoplastic) reinforced polypropylene and application thereof |
| CN111051602A (en) * | 2017-08-29 | 2020-04-21 | 三井化学株式会社 | Fiber bundling agent, inorganic reinforcing material, resin composition and molded body |
| CN112458586A (en) * | 2020-12-14 | 2021-03-09 | 东台市华阳玻纤有限责任公司 | Method for manufacturing core yarn pre-bulked core-spun yarn for asbestos-free brake band |
| CN112458586B (en) * | 2020-12-14 | 2022-04-26 | 东台市华阳玻纤有限责任公司 | Method for manufacturing core yarn pre-bulked core-spun yarn for asbestos-free brake band |
| CN115124262A (en) * | 2022-08-25 | 2022-09-30 | 淄博卓意玻纤材料有限公司 | Glass fiber impregnating compound for milk bottle |
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