CN104246049A - Treatment process for flattening electronic-grade glass fiber cloth and electronic-grade glass fiber cloth produced by using same - Google Patents
Treatment process for flattening electronic-grade glass fiber cloth and electronic-grade glass fiber cloth produced by using same Download PDFInfo
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- CN104246049A CN104246049A CN201280071200.5A CN201280071200A CN104246049A CN 104246049 A CN104246049 A CN 104246049A CN 201280071200 A CN201280071200 A CN 201280071200A CN 104246049 A CN104246049 A CN 104246049A
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- glass fiber
- fiber cloth
- electronic
- cloth
- grade glass
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Classifications
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
- D03D15/242—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads inorganic, e.g. basalt
- D03D15/267—Glass
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C27/00—Compound processes or apparatus, for finishing or dressing textile fabrics, not otherwise provided for
-
- 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
- D10B2101/00—Inorganic fibres
- D10B2101/02—Inorganic fibres based on oxides or oxide ceramics, e.g. silicates
- D10B2101/06—Glass
Abstract
The present invention relates to a treatment process for flattening electronic-grade glass fiber cloth and the electronic-grade glass fiber cloth produced by using same. First, the yarns are wound on the warp beam while sizing the yarn monofilament to take the sizing finishing process, and then the obtained warps are combined and woven to get fatty glass fiber cloth. Subsequently, the obtained fatty glass fiber cloth is set in a steaming oven for fumigating and swelling. With the effect of the ejection and fumigation of the saturated steam under the high temperature and high humidity environment, the highly expansive starch among the yarns swells rapidly under the heat and humidity, and the spaces among yarn bundles increase when the yarn bundles are kept under the high temperature and high humidity environment for some time to form secondary structural reorganization. And subsequently, the obtained swollen glass fiber cloth is heated continuously and stewed to degrease under the high temperature. Finally, the obtained degreased glass fiber cloth is opened by high-pressure injection, extruded to eliminate excess water, and impregnated with a silane coupling agent through a surface processing machine.
Description
Electronic-grade glass fiber cloth flaky process technique and its electronic-grade glass fiber cloth technical field of production
The present invention relates to a kind of electronic-grade glass fiber cloth flaky process technique and its electronic-grade glass fiber cloth of production.Background technology
Electronic-grade glass base fabric is the upstream substrate for supplying PCB industry, with flourishing for electronics industry in recent years, the compact of electronic product, lamination, high frequency, multifunctional integrated sustainable development, it is also increasingly harsher to the performance requirement of upstream electronic material substrate, about the wellability, dimensional stability, heat-resisting quantity of glass fibre base fabric（Interlaminar strength）, surface low roughness will be emphasis that downstream client gives more sustained attention and required.
Novel lead-free resin, environment friendly non-halogen resin and high Tg resin that present down-stream enterprise largely uses, polyfunctional epoxy resin mainly Jing Guo chemical modification, it can also add the filler of vast scale in addition, the adjustment change of downstream high performance resin, so that the electron glass fiber cloth base material of traditional existing process manufacture is not suitable with, mismatched therewith, wellability is caused to decline, prepreg internal gas is difficult discharge, the problems such as be also easy to produce cavity inside substrate.
At present in country's industry for glass fibre base fabric processing maintain mostly whole slurry and pass through, weave, desizing, in the traditional handicraft level of coupling agent treatment, fibrillation degree and wellability are limited, it is impossible to match and meet the requirement of high performance resin.
The content of the invention
Present invention aims to overcome that the deficiency of traditional handicraft, the electronic-grade glass fiber cloth of a kind of electronic-grade glass fiber cloth flaky process technique and its production is provided, it is improving and excavating to existing glass cloth production technology, more thorough fibrillation degree and flatness are obtained by stifling swelling process, thus electronic-grade glass fiber cloth has that wellability is good, impregnation is high, permeability is small, surface is smooth, glass cloth entirety is flat, and raising and the adhesion of resin boundary surface, strengthen the adaptability with downstream high performance resin.
The present invention is achieved by the following technical solutions, and in turn include the following steps implementation：
First, yarn monofilament starching is given while by yarn winding in warp beam, slurry is from high bloating tendency starch, the temperature control of monofilament starching is at 3 (T70 °C, drying temperature 120TTl8 (TC, running speed 5 (Tl50m/min, carries out whole slurry working process, by the warp beam of acquisition through and through, using obtaining non-degreasing glass fabric after air-jet loom weaving.
Then, above-mentioned non-degreasing glass fabric is positioned in steam steam stove and carries out stifling swelling process, be specially：In a sealed cavity, non-degreasing cloth is placed wherein, the MPa of 0. 0f0. of chamber vacuum degree 3, duration
0. 5h^24h, the ri. 2Mpa of saturated vapour pressure 0., injection, fumigation action of the non-degreasing cloth through saturated vapor gas under hot and humid environment, make the high bloating tendency starch heat of yarn interior, meet and wet rapidly swell, yarn beam certain time rests under hot and humid environment and to widen the gap for making silvalin interfascicular, forms secondary structure restructuring.
Then, by the glass cloth after above-mentioned swelling process, laser heating and smoldering ungrease treatment are carried out at high temperature, and glass fabric of the content of organics control within 0. 0 Γ 0. 1% is obtained after ungrease treatment.
Finally, glass cloth through ungrease treatment is subjected to fibrillation processing by high-pressure jet, acquisition fibrillation is uniform after the unnecessary moisture content of extruding exclusion, and surface treated machine dipping silicon protective embankment coupling agent, thickness declines, the loosely organized, glass fabric that flattening degree is high.
The present invention is that the novelty of existing process is improved, the stifling swelling technique of increase, lifts the fibrillation effect of glass cloth, thus the collapsibility of glass cloth is improved, glass cloth surface roughness is reduced, resin and the adhesion at glass cloth interface are improved, to adapt to the change requirement of downstream new environment.Loose in glass fabric after being handled through present invention process, silvalin beam, longitude and latitude intertwined point is smooth, and warp width increase, glass cloth thickness declines, internal stress reduction.
Brief description of the drawings
Technical solution of the present invention is described further below in conjunction with drawings and examples.
Fig. 1 present invention fumigates the schematic diagram of swelling process steam body of heater for electronic-grade glass fiber cloth high pressure.
Embodiment
Embodiment 1
1080# specifications are manufactured experimently, flattening working process is carried out to it using production and processing technology of the present invention.
D450 specification yarns are used according to IPC regulations（11.2tex yarns）With 60 (end/inch) through the close whole slurry warp beam of proportioning, slurry is preferably high bloating tendency starch size, 60 °C of slurry groove temperature, 140 °C of drying temperature, running speed 100m/min carries out whole slurry working process, by the warp beam of acquisition through and through, weaving process handle after obtain non-degreasing glass fabric.
Above-mentioned non-degreasing glass fabric is positioned in steam steam stove and carries out stifling swelling process：Steam stove carries out evacuation processing first, and by steam stove vacuum degree control in -0. IMPa I, 0. 8Mpa saturated vapors are sprayed in body of heater.Steamed furnace body is kept with 0. IMpa pressure, 140 °C of constant temperature and pressures, continues to take out cooling after 8hr s.
Then by the glass cloth after above-mentioned swelling process, be placed under 320 °C, through 64hrs carry out continuously, batch ungrease treatment, after ungrease treatment acquisition content of organics 0. 3% I glass fabric.
Glass cloth through ungrease treatment is placed in progress fibrillation processing under pressure 10KG/cm2, the Let of aperture 0. 10,35 °C of water temperature, vibration frequency 40HZ high-pressure jet, excluded through the compression roller that pressure is 15KG/cm2 and uniform fibrillation, thickness decline, the loosely organized, glass fibers that flattening degree is high are obtained after unnecessary moisture content, and surface treated machine dipping silicon protective embankment coupling agent
Wei Bu.
(the 1080# specification glass fiber cloths of comparative example 1）
1080 cloth produced according to conventional production technology by Shanghai HongHe Electron Material Co., Ltd, the finished product obtained after silicon protective embankment coupling agent is impregnated via surface treating machine and is compared.
Glass fibre yarn obtains unskimmed glass fabric after air-jet loom weaving, by about 40CTC desizing direct twice, glass fabric content of organics reaches 0.3% I, the electronic-grade glass fiber cloth for being compared with embodiment 1 is obtained after impregnating silicon protective embankment coupling agent through processor, 1 is seen attached list
Embodiment 2:
1078# specifications are manufactured experimently, flattening working process is carried out to it using production and processing technology of the present invention.
D450 specification yarns are used according to IPC regulations（11.2tex yarns）With 54 (end/inch) through the close whole slurry warp beam of proportioning, slurry is preferably high bloating tendency starch size, 60 °C of slurry groove temperature, 140 °C of drying temperature, running speed 100m/min carries out whole slurry working process, by the warp beam of acquisition through and through, weaving process handle after obtain non-degreasing glass fabric.
Above-mentioned non-degreasing glass fabric is positioned in steam steam stove and carries out stifling swelling process：Steam stove carries out evacuation processing first, by steam stove vacuum degree control in-O. lMPa, and O. SMpa saturated vapors are sprayed in body of heater, keeps steamed furnace body with 0. IMpa pressure, 140 °C of constant temperature and pressures, continues to take out cooling after 8hrs.
By the glass cloth after above-mentioned swelling process, be placed under 320 °C, through 64hrs carry out continuously, batch ungrease treatment.Glass fabric of the content of organics in 0. 3% I is obtained after ungrease treatment.
The glass cloth of ungrease treatment is placed in progress fibrillation processing under pressure 12KG/cm2,35 °C of 0. 10 water temperature of aperture, vibration frequency 45HZ high-pressure jet again, through pressure unnecessary moisture content is excluded for 15KG/cm2 compression roller, and uniform fibrillation, thickness decline, the loosely organized, glass fabric that flattening degree is high are obtained after surface treated machine dipping silicon protective embankment coupling agent, see attached list 1
(1078 cloth of comparative example 2）
According to traditional production technology, 1078 cloth produced by Shanghai HongHe Electron Material Co., Ltd impregnate the finished product obtained after silicon protective embankment coupling agent via surface treating machine and are compared.
Glass fibre yarn obtains unskimmed glass fabric after air-jet loom weaving, by about 38CTC desizing direct twice, glass fabric content of organics reaches 0.3%, and the electronic-grade glass fiber cloth for comparing is obtained after impregnating silicon protective embankment coupling agent through processor, 1 is seen attached list
Embodiment 3:
Trial-production（3) 106# specifications, flattening working process is carried out using production and processing technology of the present invention to it.
D900 specification yarns are used according to IPC regulations（5.5tex yarn）With 56 (end/inch) through the close whole slurry warp beam of proportioning, slurry is preferably high bloating tendency starch size, 60 °C of slurry groove temperature, 140 °C of drying temperature, running speed SOm/min carries out whole slurry working process, by the warp beam of acquisition through and through, weaving process handle after obtain non-degreasing glass fabric.
Above-mentioned non-degreasing glass fabric is positioned in steam steam stove and carries out stifling swelling process：Steam stove carries out evacuation processing first, by steam stove vacuum degree control in-O. lMPa, O. SMpa saturated vapors are sprayed in steamed furnace body, steamed furnace body are kept with 0. IMpa pressure, 140 °C of constant temperature and pressures, continue to take out cooling after 6hrs.
By the above-mentioned glass cloth after swelling process, it is placed under 320 °C, carries out continuous, batch ungrease treatment through 64hrs.Glass fabric of the content of organics in 0. 3% I is obtained after ungrease treatment.
Glass cloth through ungrease treatment is placed in pressure 8KG/cm2, the 10mm of aperture 0., fibrillation processing is carried out under 35 °C of water temperature, vibration frequency 35HZ high-pressure jet, through pressure unnecessary moisture content is excluded for 15KG/cm2 compression roller, and uniform fibrillation, thickness decline, the loosely organized, glass fabric that flattening degree is high are obtained after surface treated machine dipping silicon protective embankment coupling agent, see attached list 1.
(106 cloth of comparative example 3）
According to traditional production technology, 106 cloth produced by Shanghai HongHe Electron Material Co., Ltd impregnate the finished product obtained after silicon protective embankment coupling agent via surface treating machine and are compared.
Glass fibre yarn obtains unskimmed glass fabric after air-jet loom weaving, by about 36CTC desizing direct twice, glass fabric content of organics reaches 0.3%, and the electronic-grade glass fiber cloth for comparing is obtained after impregnating silicon protective embankment coupling agent through processor, 1 is seen attached list.
Subordinate list 1
Swim processing procedure
Water absorption rate（PCT-2h *) 1.06 1.13 0.45 1.45 1.51 0.78 performances
Note:
Method of testing through weft width：Left, center, right three collection point wide to electronic-grade glass fiber cloth full width respectively shoots three pictures under microscope, measures warp, the width of weft yarn at each collection point, finally takes average.
Thickness measure：Use digital display type, the micrometer that measurement accuracy is 0. 001mm（Finger gauge）Instrument, left, center, right respectively take three collection points in electronic-grade glass fiber cloth full width wide scope, measure its cloth thickness, finally take average.
Air permeability is measured：Using import TEXtest air permeability measuring instruments, the air permeability of two-point measurement cloth cover is respectively taken at the left, center, right that electronic-grade glass fiber cloth cloth is tied, average is finally taken.
Impregnation is measured：The sample of three pieces of 10cm*10cm sizes is respectively sampled at the left, center, right position of electronic-grade glass fiber cloth, sample is placed in organic solvent, using side lamp observation sample cloth cover infiltration situation in closed darkroom, the time is recorded, finally takes average.
Heat resistance is tested：Electronic-grade glass fiber cloth is contained after resin pickup, it is lamination after an overlapping with six, by the plate cutting pressed into 5cm*5cm sizes, after 120 °C, 1. lbar boilings, thermal shock is carried out in the tin stove for being placed in 283 °C, it is that experiment terminates that layering, which occurs, in plate face, finally takes average.
Water cut test：Electronic-grade glass fiber cloth is contained after resin pickup, is to be laminated after an overlapping with six, by the plate cutting pressed into 5cm*5cm sizes, 105 °C, weighs after 30min dryings and obtains weight si, and after s2 is obtained after 120 °C, 1. lbar boilings,（S2-sl)/sl obtains the water absorption rate resin of sheet material, will finally take average.
Glass cloth after processed by the invention compared with prior art, see attached list 1, it is big through weft width, section through weft yarn becomes more flat, thickness is decreased obviously, and understands that a piece of paper and ten paper are lost the speed soaked in water and distinguished respectively by existence general knowledge, and wetting velocity is significantly for industrial production faster, the production capacity of an enterprise can be improved, makes enterprise more competitive.The raising of wellability has vital effect for the high performance resin of these impregnation difficulties of such as Halogen, high-fire resistance etc. of the adaptation emerging appearance of downstream industry.It is loose in the glass cloth silvalin beam of the present invention, longitude and latitude intertwined point is smooth, the reduction of surface low roughness, internal stress, dimensional stability, heat resistance, water absorption rate, heat-resisting quantity（Interlaminar strength）Raising etc. combination property be it is more preferable must meet matching downstream industry resin adjustment change the need for, adapt to development downstream because of industry to the performance of upstream electronic material substrate increasingly harsher trend.
Claims (1)
- Claim1st, a kind of electronic-grade glass fiber cloth flaky process technique, it is characterised in that in turn include the following steps：First, yarn monofilament starching is given while by yarn winding in warp beam, slurry is from high bloating tendency starch, the temperature control of monofilament starching is at 3 (T70 °C, drying temperature 120TTl8 (TC, running speed 5 (Tl50m/min, carries out whole slurry working process, by the warp beam of acquisition through and through, using obtaining non-degreasing glass fabric after air-jet loom weaving；Then, above-mentioned non-degreasing glass fabric is positioned in steam steam stove and carries out stifling swelling process, make injection, fumigation action of the non-degreasing cloth through saturated vapor gas under hot and humid environment, make the high bloating tendency starch heat of yarn interior, meet and wet rapidly swell, yarn beam certain time rests under hot and humid environment and to widen the gap for making silvalin interfascicular, forms secondary structure restructuring；Then, by the glass cloth after above-mentioned swelling process, laser heating and smoldering ungrease treatment are carried out at high temperature, and glass fabric of the content of organics control within 0. 0 Γ 0. 1% is obtained after ungrease treatment；Finally, glass cloth through ungrease treatment is subjected to fibrillation processing by high-pressure jet, acquisition fibrillation is uniform after the unnecessary moisture content of extruding exclusion, and surface treated machine dipping silicon protective embankment coupling agent, thickness declines, the loosely organized, glass fabric that flattening degree is high.2nd, electronic-grade glass fiber cloth flaky process technique as claimed in claim 1, it is characterised in that the stifling swelling process, concrete operations are：In a sealed cavity, non-degreasing cloth is placed wherein, the MPa of 0. 0 Γ of chamber vacuum degree 0. 3, the 5h 24h of duration 0., the Γ 2Mpa of saturated vapour pressure 0..3rd, a kind of electronic-grade glass fiber cloth, it is characterised in that obtained by claims 1 or 2 flaky process technique productions.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2012/073598 WO2013149400A1 (en) | 2012-04-06 | 2012-04-06 | Treatment process for flattening electronic-grade glass fiber cloth and electronic-grade glass fiber cloth produced by using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104246049A true CN104246049A (en) | 2014-12-24 |
| CN104246049B CN104246049B (en) | 2016-02-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280071200.5A Active CN104246049B (en) | 2012-04-06 | 2012-04-06 | The electronic-grade glass fiber cloth of electronic-grade glass fiber cloth flaky process technique and production thereof |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR20150001797A (en) |
| CN (1) | CN104246049B (en) |
| WO (1) | WO2013149400A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105887394A (en) * | 2016-06-14 | 2016-08-24 | 建滔（清远）玻璃纤维有限公司 | After-treatment processing method and equipment of flat electronic grade glass fiber cloth |
| CN106906556A (en) * | 2017-03-09 | 2017-06-30 | 建滔（连州）玻璃纤维有限公司 | A kind of Resisting fractre Strength-Glass-Fibre cloth high and its production method |
| CN109355776A (en) * | 2018-11-02 | 2019-02-19 | 山东谦津电子科技有限公司 | The overweight weaving process method for thickening electronic-grade glass fiber cloth |
| CN113943992A (en) * | 2021-11-03 | 2022-01-18 | 宏和电子材料科技股份有限公司 | Splitting method for electronic-grade glass fiber cloth and product thereof |
| CN114645365A (en) * | 2022-03-18 | 2022-06-21 | 泰山玻璃纤维邹城有限公司 | Splitting process easy to clean electronic-grade glass fiber cloth slurry and slurry used in splitting process |
| CN115354494A (en) * | 2022-08-28 | 2022-11-18 | 建滔(广东)电子专用材料有限公司 | Production method of thin electronic-grade glass fiber cloth |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104878504A (en) * | 2015-05-28 | 2015-09-02 | 安徽丹凤集团桐城玻璃纤维有限公司 | Production process of long-life electronic-grade fiberglass cloth |
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| US3980610A (en) * | 1974-11-25 | 1976-09-14 | The Firestone Tire & Rubber Company | Unsaturated polyester-1,2 polybutadiene molding compound |
| US5316837A (en) * | 1993-03-09 | 1994-05-31 | Kimberly-Clark Corporation | Stretchable metallized nonwoven web of non-elastomeric thermoplastic polymer fibers and process to make the same |
| CN101532229A (en) * | 2009-03-12 | 2009-09-16 | 珠海富华复合材料有限公司 | Process for flattening post treatment of electronic grade glass fiber cloth |
| CN101798758A (en) * | 2009-08-13 | 2010-08-11 | 上海宏和电子材料有限公司 | Fiber opening process of electronic grade glass fiber cloth and size used in same |
| CN101871149A (en) * | 2010-06-04 | 2010-10-27 | 上海宏和电子材料有限公司 | Fiber opening method for electronic grade glass fiber cloth and electronic grade glass fiber cloth obtained by using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2870938B2 (en) * | 1990-02-28 | 1999-03-17 | 日東紡績株式会社 | Glass cloth for printed circuit boards |
-
2012
- 2012-04-06 CN CN201280071200.5A patent/CN104246049B/en active Active
- 2012-04-06 WO PCT/CN2012/073598 patent/WO2013149400A1/en active Application Filing
- 2012-04-06 KR KR20147030982A patent/KR20150001797A/en not_active Application Discontinuation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3980610A (en) * | 1974-11-25 | 1976-09-14 | The Firestone Tire & Rubber Company | Unsaturated polyester-1,2 polybutadiene molding compound |
| US5316837A (en) * | 1993-03-09 | 1994-05-31 | Kimberly-Clark Corporation | Stretchable metallized nonwoven web of non-elastomeric thermoplastic polymer fibers and process to make the same |
| CN101532229A (en) * | 2009-03-12 | 2009-09-16 | 珠海富华复合材料有限公司 | Process for flattening post treatment of electronic grade glass fiber cloth |
| CN101798758A (en) * | 2009-08-13 | 2010-08-11 | 上海宏和电子材料有限公司 | Fiber opening process of electronic grade glass fiber cloth and size used in same |
| CN101871149A (en) * | 2010-06-04 | 2010-10-27 | 上海宏和电子材料有限公司 | Fiber opening method for electronic grade glass fiber cloth and electronic grade glass fiber cloth obtained by using same |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105887394A (en) * | 2016-06-14 | 2016-08-24 | 建滔（清远）玻璃纤维有限公司 | After-treatment processing method and equipment of flat electronic grade glass fiber cloth |
| CN106906556A (en) * | 2017-03-09 | 2017-06-30 | 建滔（连州）玻璃纤维有限公司 | A kind of Resisting fractre Strength-Glass-Fibre cloth high and its production method |
| CN109355776A (en) * | 2018-11-02 | 2019-02-19 | 山东谦津电子科技有限公司 | The overweight weaving process method for thickening electronic-grade glass fiber cloth |
| CN113943992A (en) * | 2021-11-03 | 2022-01-18 | 宏和电子材料科技股份有限公司 | Splitting method for electronic-grade glass fiber cloth and product thereof |
| CN114645365A (en) * | 2022-03-18 | 2022-06-21 | 泰山玻璃纤维邹城有限公司 | Splitting process easy to clean electronic-grade glass fiber cloth slurry and slurry used in splitting process |
| CN115354494A (en) * | 2022-08-28 | 2022-11-18 | 建滔(广东)电子专用材料有限公司 | Production method of thin electronic-grade glass fiber cloth |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104246049B (en) | 2016-02-24 |
| KR20150001797A (en) | 2015-01-06 |
| WO2013149400A1 (en) | 2013-10-10 |
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Address after: 201315 Shanghai city Pudong Kangqiao Industrial Zone No. 123 road show Patentee after: Acer and electronic materials Polytron Technologies Inc Address before: Hunan Pudong New Area Kangqiao Industrial Zone, Shanghai City Road 201315 No. 2502 room 306 Patentee before: Shanghai Honghe Electronic Material Co., Ltd. |