CN102558610B - Enhanced type composite filler and method for preparing fiber-reinforced plastic product by using same - Google Patents
Enhanced type composite filler and method for preparing fiber-reinforced plastic product by using same Download PDFInfo
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- CN102558610B CN102558610B CN 201010614315 CN201010614315A CN102558610B CN 102558610 B CN102558610 B CN 102558610B CN 201010614315 CN201010614315 CN 201010614315 CN 201010614315 A CN201010614315 A CN 201010614315A CN 102558610 B CN102558610 B CN 102558610B
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Abstract
The invention provides an enhanced composite filler capable of improving the strength, the stiffness and the dimensional stability of a fiber-reinforced plastic product and a method for preparing the fiber-reinforced plastic product by using the enhanced composite filler. The enhanced composite filler specifically consists of three kinds of modified powder, i.e. modified rod-shaped powder, modified flake-shaped powder and modified granular powder, and the modified powder comprises powder and modifiers coated on the surface of the powder, wherein the weight of the modifiers is 0.5-10% of the weight of the modified powder, and the modified rod-shaped powder accounts for 10-90 parts by weight, the modified flake-shaped powder accounts for 5-60 parts by weight, and the modified granular powder accounts for 0.5-40 parts by weight. The method provided by the invention has the advantages that: the prepared product is excellent in strength, stiffness and toughness, the raw materials are easily obtained, and the operating process is simple, so that the method is applicable for industrial scale production.
Description
Technical field
The present invention relates to the preparation method of a kind of enhancement type compounded mix and glass fiber reinforced plastics product thereof.
Background technology
Glass fiber reinforced plastics product is celebrated so that light weight is high-strength, but because cost is relatively high, thereby limited its widespread use.At present, the approach that reduces the glass fiber reinforced plastics product cost mainly contains two, and one is composition optimizes, and another is under the prerequisite that does not reduce product properties, changes comparatively cheap starting material.Secondly, existing glass reinforced plastic system, when the larger thin shell type goods of moulding, although can increase goods rigidity by measures such as default stiffening webs, but usually because the problems such as product deformation appear in insufficient rigidity; And for portioned product, if stiffening web is too much overstocked, will be so that moulding process be slightly aobvious complicated, construction inconvenience.Therefore, how to address the above problem, for the glass reinforced plastic practitioner, particularly reality is with urgent.For a long time, by in glass reinforced plastic, adding mineral filler, increase rigidity, hardness, the intensity of goods and the method for improving product size stability, widely use.But the filler that uses at present, kind is comparatively single, and majority is unmodified primary inorganic powder.Therefore, use it as filler, the glass fiber reinforced plastics product of producing usually when rigidity, hardness improve, the problem of intensity, toughness decline occurs.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of enhancement type compounded mix that can improve glass fiber reinforced plastics product intensity, rigidity and dimensional stability is provided, and use this enhancement type compounded mix to prepare the method for glass fiber reinforced plastics product.
In order to reach described purpose, technical scheme of the present invention is that a kind of enhancement type compounded mix is by the rod-shaped powder after the modification, flaky powder and granular phosphor composing; Powder after the modification comprises powder and its surface coated properties-correcting agent, and wherein to account for the weight percent of modified powder be 0.5～10% to properties-correcting agent; Rod-shaped powder after the modification is that the flaky powder after 10～90 weight parts, the modification is that granular powder after 5～60 weight parts, the modification is 0.5～40 weight part.
The particle size range of described rod-shaped powder is 0.01～100 μ m, and the particle size range of flaky powder is 0.1～70 μ m, and the particle size range of granular powder is 0.01～20 μ m.
Described properties-correcting agent is selected from one or more in silane coupling agent, titanate coupling agent, aluminate coupling agent, zirconium ester coupling agent, the polymeric dispersant.
Described polymeric dispersant is one or more in stearate, polyoxyethylene glycol, polyvinyl alcohol, polyethylene wax, sodium polyacrylate or the sodium polyphosphate.
Described rod-shaped powder is selected from one or more in glass fibre, carbon fiber, asbestos, the tremolite, wollastonite, the fibrous sepiolite.Described flaky powder is selected from one or more in graphite, mica, kaolin, talcum, vermiculite, hydrated aluminum oxide, the perlite.Described granular powder is selected from one or more in carbon black, aluminum oxide, zinc oxide, aerosil, precipitated silica, titanium dioxide, aluminium hydroxide, water-ground limestone, light calcium carbonate, barite, the magnesium hydroxide.
Another object of the present invention provides a kind ofly uses described enhancement type compounded mix to prepare the method for glass fiber reinforced plastics product, it is characterized in that may further comprise the steps:
1. powder surface modification, after rod-shaped powder, flaky powder and granular powder dried respectively, spraying adds properties-correcting agent under the high-speed stirring state, finish the surface modification of powder, the weight percent that properties-correcting agent accounts for modified powder is 0.5～10%, treatment temp is 60～80 ℃, and the treatment time is 1～10min;
2. preparation composite granule, after the rod-shaped powder after the modification, flaky powder and granular powder mixed by 10～90: 5～60: 0.5～40 weight proportion under 20～120 ℃ in high-speed mixer dispersed with stirring 5～40min, form composite granule;
3. resin tentatively mixes with powder, composite granule with step 2 obtains mixes by the weight ratio of portions of resin composite granule=100: 1～100 with the unsaturated polyester resin that adds promotor, finishes preliminary mixing by stirring, mixing time 1～10min, temperature is room temperature;
4. the further blend of resin and powder disperses.The preliminary mixture that step 3 is obtained at room temperature disperses by the further blend of mixing device, and jitter time is 5～30min, forms mixed slurry;
5. mixed slurry is degassed.The mixture that step 4 obtains is put into the vacuum stirring de-gassing vessel, stir and degassed 1～15min under the room temperature;
6. then the adding solidifying agent prepares glass reinforced plastic in conjunction with glasscloth.Add solidifying agent in the mixture that step 5 obtains, solidifying agent is 2% of unsaturated polyester resin weight, stirs 1～5min, after stirring, in conjunction with glasscloth formed glass steel work.
The promotor of using in the step 3 is cobalt naphthenate or cobalt iso-octoate, and usage quantity is 0.5～1.5% of unsaturated polyester resin weight.
Mixing device described in the step 4 is a kind of in kneader, Banbury mixer, ball mill, colloidal mill, the stirring mill.
Solidifying agent described in the step 6 is methylethyl ketone peroxide or cyclohexanone peroxide.
Glasscloth described in the step 6 is one or more in glasscloth or glass mat or the strong core blanket.
The present invention compared with prior art, has following advantage: the enhancement type compounded mix among (1) the present invention, collaborative, different types of surface-modifying agent of the grating of the inorganic powder of its material component by different-grain diameter, difform inorganic powder compound, and form chemical bonding firmly and unique Reinforced structure between the matrix resin, therefore can make all good glass fiber reinforced plastics product of intensity, rigidity, toughness.(2) the enhancement type compounded mix among the present invention is when being applied to glass fiber reinforced plastics product, disperse and the means such as vacuum stirring is degassed by brute force, not only so that mineral filler disperses more evenly in resin matrix, and eliminated the part holes in the resin matrix, thereby improved the compactness of goods.Therefore the reinforced effects of filler is more obvious, and the mechanical property of goods is better.(3) in glass fiber reinforced plastics product, use the enhancement type compounded mix, can improve intensity, rigidity, the dimensional stability of goods.(4) the enhancement type compounded mix among the present invention when using in glass fiber reinforced plastics product, has advantages of that raw material is easy to get, operating procedure simple, is fit to commercial scale production.
Description of drawings
Fig. 1 is goods and the tensile strength comparison diagram that does not add the sample of filler among the embodiment 12～16.
Fig. 2 is goods and the flexural strength comparison diagram that does not add the sample of filler among the embodiment 12～16.
Fig. 3 is goods and the shock strength comparison diagram that does not add the sample of filler among the embodiment 12～16.
Embodiment
Following examples are described further the present invention by reference to the accompanying drawings.
Embodiment 1
The process of powder surface modification, concrete steps are as follows:
A, get the fibrous sepiolite powder that the 1000g particle diameter is 0.01 μ m, kaolin powder and the 1000g particle diameter that the 1000g particle diameter is 0.1 μ m is the carbon black of 0.01 μ m, puts into respectively baking oven, 120 ℃ of lower dry 2h;
B, dried 1000g fibrous sepiolite powder is poured in the reactor, under the high-speed stirring state, spraying adds the 20g titanate coupling agent NDZ-401 that has disperseed with the trace acetone dilution, and keeping temperature is 60 ℃, and the treatment time is 1min;
C, dried 1000g kaolin powder is poured in the reactor, under the high-speed stirring state, spraying adds the 30g Silane coupling agent KH550 that has disperseed with the trace acetone dilution, and keeping temperature is 70 ℃, and the treatment time is 7min;
D, dried 1000g carbon black is poured in the reactor, under the high-speed stirring state, spraying adds the 50g polyethylene wax that has disperseed with the trace acetone dilution, and keeping temperature is 80 ℃, and the treatment time is 5min.
Because modification is very little on the impact of diameter of particle, therefore, diameter of particle can be considered identical before and after the modification, and following examples are also same.
Embodiment 2
The step of embodiment 2 is with embodiment 1, and its difference is that used powder is respectively the short glass fiber powder 1000g that median size is 1 μ m, and 60 ℃ lower to 25g silane coupling agent KH570 processing 2min; Median size is the Graphite Powder 99 500g of 1 μ m, and 65 ℃ lower to 5g aluminate coupling agent SG-Al 821 processing 3min; Median size is the aluminum oxide powder 400g of 1 μ m, and 75 ℃ lower to 15g sodium stearate processing 8min.
Embodiment 3
The step of embodiment 3 is with embodiment 1, and its difference is that used powder is respectively the carbon fiber powder that median size is 5 μ m, uses zirconium ester coupling agent SG-Zr803 to process; Median size is the mica powder of 70 μ m, uses silane coupling agent KH560 to process; Median size is the aluminium hydrate powder of 5 μ m, uses polyoxyethylene glycol to process; Treatment time is 5min, and keeping temperature during modification is about 80 ℃.
Embodiment 4
The step of embodiment 4 is with embodiment 1, and its difference is that used powder is respectively the asbestos powder that median size is 10 μ m, uses polyvinyl alcohol to process; Median size is the mica powder of 50 μ m, uses titanate coupling agent NDZ-201 to process; Median size is the aluminium hydrate powder of 10 μ m, uses silane coupling agent KH 580 to process; Treatment time is 7min, and keeping temperature during modification is about 60 ℃.
Embodiment 5
The step of embodiment 5 is with embodiment 1, and its difference is that used powder is respectively the wollastonite powder that median size is 50 μ m, uses silane coupling agent KH 590 to process; Median size is the mica powder of 20 μ m, uses titanate coupling agent NDZ-102 to process; Median size is the aluminium hydrate powder of 15 μ m, uses sodium polyacrylate to process; Treatment time is 10min, and keeping temperature during modification is about 70 ℃.
Embodiment 6
The step of embodiment 6 is with embodiment 1, and its difference is that used powder is respectively the tremolite powder that median size is 80 μ m, uses sodium polyphosphate to process; Median size is the talcum powder of 10 μ m, uses silane coupling agent KH 540 to process; Median size is the heavy calcium carbonate of 20 μ m, uses titanate coupling agent NDZ-311 to process; Treatment time is 10min, and keeping temperature during modification is about 65 ℃.
Embodiment 7
The step of embodiment 7 is with embodiment 1, and its difference is that used powder is respectively the tremolite powder that median size is 10 μ m, uses Zinic stearas to process; Median size is the vermiculite power of 10 μ m, uses titanate coupling agent NDZ-101 to process; Median size is the oxide powder and zinc of 10 μ m, uses Silane coupling agent KH550 to process; Treatment time is 6min, and keeping temperature during modification is about 70 ℃.
Embodiment 8
The step of embodiment 8 is with embodiment 1, and its difference is that used powder is respectively the carbon fiber powder that median size is 10 μ m, uses titanate coupling agent NDZ-401 to process; Median size is the alumina hydrate powder of 10 μ m, uses silane coupling agent KH 570 to process; Median size is the aerosil powder of 1 μ m, uses silane coupling agent KH 550 to process; Treatment time is 10min, and keeping temperature during modification is about 65 ℃.
Embodiment 9
The step of embodiment 9 is with embodiment 1, and its difference is that used powder is respectively the carbon fiber powder that median size is 10 μ m, uses polyoxyethylene glycol to process; Median size is the alumina hydrate powder of 10 μ m, uses titanate coupling agent NDZ-101 to process; Median size is the aerosil powder of 1 μ m, uses silane coupling agent SG-Si151 to process; Treatment time is 10min, and keeping temperature during modification is about 75 ℃.
Embodiment 10
The step of embodiment 10 is with embodiment 1, and its difference is that used powder is respectively the wollastonite powder that median size is 10 μ m, uses silane coupling agent SG-Si900 to process; Median size is the perlite powder of 10 μ m, uses zirconium ester coupling agent SG-Zr804 to process; Median size is the precipitated silica powder of 20 μ m, uses silane coupling agent KH 550 to process; Treatment time is 5min, and keeping temperature during modification is about 65 ℃.
Embodiment 11
The step of embodiment 11 is with embodiment 1, and its difference is that used powder is respectively the wollastonite powder that median size is 10 μ m, uses silane coupling agent SG-Si900 to process; Median size is the perlite powder of 10 μ m, uses trolamine to process; Median size is the titanium dioxide powder of 20 μ m, uses silane coupling agent KH 570 to process; Treatment time is 5min, and keeping temperature during modification is about 70 ℃.
Get among the embodiment 2 powder after the modification of preparation, concrete amount is: median size is the short glass fiber powder 10g of 1 μ m, median size is the Graphite Powder 99 60g of 1 μ m, median size is the aluminum oxide powder 30g of 1 μ m, after respectively dry under 20 ℃ in high-speed mixer dispersed with stirring 5min, form composite granule; Then composite granule and the pre-short unsaturated polyester resin of 900g are used at room temperature blending dispersion 3min of stirring rake, form preliminary mixture; Unsaturated polyester resin has added cobalt naphthenate promotor before using, and wherein the amount of promotor is 1 of unsaturated polyester resin weight
Then preliminary mixture is put into kneader, further blending dispersion 15min under the room temperature; In the vacuum stirring de-gassing vessel, mix and degassed 1min under the room temperature subsequently, take out at last blend glue stuff, behind 18g methylethyl ketone peroxide solidifying agent mixing 1min, successively apply the also alkali free glass fibre woven roving of 10 layers of 400g/m2 of hand pasting forming.
Get among the embodiment 3 powder after the modification of preparation, concrete amount is: median size is the carbon fiber powder 20g of 5 μ m, median size is the mica powder 55g of 70 μ m, median size is the aluminium hydrate powder 25g of 5 μ m, after respectively dry under 40 ℃ in high-speed mixer dispersed with stirring 5min, form composite granule; Then composite granule and the pre-short unsaturated polyester resin of 900g are used at room temperature blending dispersion 3min of stirring rake, form preliminary mixture; Unsaturated polyester resin has added cobalt naphthenate promotor before using, and wherein the amount of promotor is 1 of unsaturated polyester resin weight
Then preliminary mixture is put into Banbury mixer, further blending dispersion 30min under the room temperature; In the vacuum stirring de-gassing vessel, mix and degassed 3min under the room temperature subsequently, take out at last blend glue stuff, behind 18g cyclohexanone peroxide solidifying agent mixing 1min, successively apply the also alkali free glass fibre woven roving of 10 layers of 400g/m2 of hand pasting forming.
Get among the embodiment 4 powder after the modification of preparation, concrete amount is: median size is the asbestos powder 30g of 10 μ m, median size is the mica powder 50g of 50 μ m, median size is the aluminium hydrate powder 20g of 10 μ m, after respectively dry under 50 ℃ in high-speed mixer dispersed with stirring 15min, form composite granule; Then composite granule and the pre-short unsaturated polyester resin of 900g are used at room temperature blending dispersion 5min of stirring rake, form preliminary mixture; Unsaturated polyester resin has added cobalt naphthenate promotor before using, and wherein the amount of promotor is 1 of unsaturated polyester resin weight
Then preliminary mixture is put into ball mill, further blending dispersion 15min under the room temperature, subsequently in the vacuum stirring de-gassing vessel, mix and degassed 5min under the room temperature, take out at last blend glue stuff, behind 18g solidifying agent methylethyl ketone peroxide mixing 2min, successively apply the also alkali free glass fibre woven roving of 10 layers of 400g/m2 of hand pasting forming.
Get among the embodiment 5 powder after the modification of preparation, concrete amount is: median size is the wollastonite powder 50g of 50 μ m, median size is the mica powder 35g of 20 μ m, median size is the aluminium hydrate powder 15g of 15 μ m, after respectively dry under 70 ℃ in high-speed mixer dispersed with stirring 20min, form composite granule; Then composite granule and the pre-short unsaturated polyester resin of 900g are used at room temperature blending dispersion 5min of stirring rake, form preliminary mixture; Unsaturated polyester resin has added cobalt naphthenate promotor before using, and wherein the amount of promotor is 1 of unsaturated polyester resin weight
Then preliminary mixture is put into colloidal mill, further blending dispersion 20min under the room temperature, subsequently in the vacuum stirring de-gassing vessel, mix and degassed 8min under the room temperature, take out at last blend glue stuff, behind 18g methylethyl ketone peroxide solidifying agent mixing 3min, successively apply the also alkali free glass fibre woven roving of 10 layers of 400g/m2 of hand pasting forming.
Get among the embodiment 6 powder after the modification of preparation, concrete amount is: median size is the tremolite powder 70g of 80 μ m, median size is the talcum powder 20g of 10 μ m, median size is the heavy calcium carbonate 10g of 20 μ m, after dry under 100 ℃ in high-speed mixer dispersed with stirring 30min, then mixture and the pre-short unsaturated polyester resin of 900g are used at room temperature blending dispersion 10min of stirring rake, form preliminary mixture; Unsaturated polyester resin has added cobalt naphthenate promotor before using, and wherein the amount of promotor is 1 of unsaturated polyester resin weight
Then preliminary mixture is put into colloidal mill, further blending dispersion 10min under the room temperature, subsequently in the vacuum stirring de-gassing vessel, mix and degassed 10min under the room temperature, take out at last blend glue stuff, behind 18g cyclohexanone peroxide solidifying agent mixing 2min, successively apply the also alkali free glass fibre woven roving of 10 layers of 400g/m2 of hand pasting forming.
Embodiment 17
Get among the embodiment 7 powder after the modification of preparation, concrete amount is: median size is the tremolite powder 50g of 10 μ m, median size is the vermiculite power 25g of 10 μ m, median size is the oxide powder and zinc 25g of 10 μ m, after dry under 70 ℃ in high-speed mixer dispersed with stirring 35min, then mixture and the pre-short unsaturated polyester resin of 900g are used at room temperature blending dispersion 8min of stirring rake, form preliminary mixture; Unsaturated polyester resin has added cobalt naphthenate promotor before using, and wherein the amount of promotor is 1 of unsaturated polyester resin weight
Then preliminary mixture is put into and stirred mill, further blending dispersion 5min under the room temperature, subsequently in the vacuum stirring de-gassing vessel, mix and degassed 12min under the room temperature, take out at last blend glue stuff, behind 18g cyclohexanone peroxide solidifying agent mixing 4min, successively apply the also alkali free glass fibre woven roving of 10 layers of 400g/m2 of hand pasting forming.
Embodiment 18 tensile strengths, flexural strength and shock strength experimental example
For 5 groups of glass fiber reinforced plastics products of described embodiment 12～16 preparations, carried out respectively tensile strength experiment, flexural strength experiment and shock strength experiment, experimental result is seen respectively Fig. 1, Fig. 2 and Fig. 3.By the tensile strength experiment as can be known, behind the interpolation filler, the tensile strength of part goods increases.By the flexural strength experiment as can be known, behind the interpolation filler, the flexural strength of part goods slightly is improved.By the shock strength experiment as can be known, behind the interpolation filler, the shock strength of goods improves clearly.
The usage quantity of each raw material among the described embodiment can be adjusted in aforementioned amount ranges, the powder of the different shape in the previous embodiment can use the powder of other same kind of not using in the aforementioned embodiment to substitute, hand pasting forming material in the previous embodiment can use other glasscloth that does not use in the aforementioned embodiment, and the enhancement type compounded mix in the previous embodiment can be used for the glass fiber reinforced plastics product of hand pasting forming and other technological forming.Described embodiment only for the present invention will be described, does not consist of the restriction to the claim scope, and other alternative means that it may occur to persons skilled in the art that is all in claim scope of the present invention.
Claims (9)
1. enhancement type compounded mix, it is characterized in that by the rod-shaped powder after the modification, flaky powder and granular phosphor composing, wherein the powder after the modification comprises powder and its surface coated properties-correcting agent, the weight percent that properties-correcting agent accounts for modified powder is 0.5～10%, and the rod-shaped powder after the modification is that the flaky powder after 10～90 weight parts, the modification is that granular powder after 5～60 weight parts, the modification is 0.5～40 weight part; The particle size range of rod-shaped powder is 0.01～100 μ m, and the particle size range of flaky powder is 0.1～70 μ m, and the particle size range of granular powder is 0.01～20 μ m.
2. a kind of enhancement type compounded mix as claimed in claim 1 is characterized in that properties-correcting agent is selected from one or more in silane coupling agent, titanate coupling agent, aluminate coupling agent, zirconium ester coupling agent, the polymeric dispersant.
3. a kind of enhancement type compounded mix as claimed in claim 2 is characterized in that described polymeric dispersant is one or more in stearate, polyoxyethylene glycol, polyvinyl alcohol, polyethylene wax, sodium polyacrylate or the sodium polyphosphate.
4. a kind of enhancement type compounded mix as claimed in claim 1 is characterized in that rod-shaped powder is selected from one or more in glass fibre, carbon fiber, asbestos, the tremolite, wollastonite, the fibrous sepiolite; Flaky powder is selected from one or more in graphite, mica, kaolin, talcum, vermiculite, hydrated aluminum oxide, the perlite; Granular powder is selected from one or more in carbon black, aluminum oxide, zinc oxide, aerosil, precipitated silica, titanium dioxide, aluminium hydroxide, water-ground limestone, light calcium carbonate, barite, the magnesium hydroxide.
5. a right to use requires 1 described enhancement type compounded mix to prepare the method for glass fiber reinforced plastics product, it is characterized in that may further comprise the steps:
Step 1, powder surface modification, after rod-shaped powder, flaky powder and granular powder dried respectively, spraying adds properties-correcting agent under the high-speed stirring state, finish the surface modification of powder, the weight percent that properties-correcting agent accounts for modified powder is 0.5～10%, and treatment temp is 60～80 ℃, and the treatment time is 1～10min;
Step 2, the preparation composite granule, after the rod-shaped powder after the modification, flaky powder and granular powder mixed by the weight proportion of 10～90:5～60:0.5～40 under 20～120 ℃ in high-speed mixer dispersed with stirring 5～40min, form composite granule;
Step 3, resin tentatively mixes with powder, with the composite granule of step 2 acquisition, mix by the weight ratio of resin: composite granule=100:1～100:100 with the unsaturated polyester resin that adds promotor, to finish preliminary mixing by stirring, mixing time 1～10min, temperature is room temperature;
Step 4, the further blend of resin and powder disperses; The preliminary mixture that step 3 is obtained at room temperature disperses by the further blend of mixing device, and jitter time is 5～30min, forms mixed slurry;
Step 5, mixed slurry degassed; The mixture that step 4 obtains is put into the vacuum stirring de-gassing vessel, stir and degassed 1～15min under the room temperature;
Step 6 adds solidifying agent, then prepares glass reinforced plastic in conjunction with glasscloth; Add solidifying agent in the mixture that step 5 obtains, solidifying agent is 2% of unsaturated polyester resin weight, stirs 1～5min, after stirring, in conjunction with glasscloth formed glass steel work.
6. a kind of method for preparing glass fiber reinforced plastics product as claimed in claim 5 is characterized in that the promotor of using in the step 3 is cobalt naphthenate or cobalt iso-octoate, and usage quantity is 0.5～1.5% of unsaturated polyester resin weight.
7. a kind of method for preparing glass fiber reinforced plastics product as claimed in claim 5 is characterized in that the mixing device described in the step 4 is a kind of in kneader, Banbury mixer, ball mill, colloidal mill, the stirring mill.
8. a kind of method for preparing glass fiber reinforced plastics product as claimed in claim 5 is characterized in that the solidifying agent described in the step 6 is methylethyl ketone peroxide or cyclohexanone peroxide.
9. a kind of method for preparing glass fiber reinforced plastics product as claimed in claim 5 is characterized in that the glasscloth described in the step 6 is a kind of in glasscloth or glass mat or the strong core blanket.
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| CN115651427A (en) * | 2022-10-24 | 2023-01-31 | 江西广源化工有限责任公司 | High-wear-resistance composite filler and preparation method and application thereof |
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| CN101870804A (en) * | 2009-04-24 | 2010-10-27 | 上海金发科技发展有限公司 | High-lustre reinforced polyethylene terephthalate composite material and preparation method thereof |
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| JPS6460625A (en) * | 1987-08-31 | 1989-03-07 | Toshiba Corp | Casting epoxy resin composition |
| DE19614600C1 (en) * | 1996-04-13 | 1997-04-24 | Singulus Technologies Gmbh | Device for masking central and outer areas of substrate to be sputter coated |
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