CN102922837B - For making composite sheet and the processing method thereof of antistatic carrying belt - Google Patents
For making composite sheet and the processing method thereof of antistatic carrying belt Download PDFInfo
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- CN102922837B CN102922837B CN201210437182.XA CN201210437182A CN102922837B CN 102922837 B CN102922837 B CN 102922837B CN 201210437182 A CN201210437182 A CN 201210437182A CN 102922837 B CN102922837 B CN 102922837B
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- carrying belt
- antistatic
- intermediate layer
- resin
- composite sheet
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- 239000002131 composite material Substances 0.000 title claims abstract description 25
- 238000003672 processing method Methods 0.000 title claims abstract description 11
- 239000010410 layer Substances 0.000 claims abstract description 74
- 239000011347 resin Substances 0.000 claims abstract description 36
- 229920005989 resin Polymers 0.000 claims abstract description 36
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000000314 lubricant Substances 0.000 claims abstract description 16
- 238000002835 absorbance Methods 0.000 claims abstract description 15
- 210000002615 epidermis Anatomy 0.000 claims abstract description 7
- 238000001125 extrusion Methods 0.000 claims abstract description 5
- 239000011229 interlayer Substances 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims description 28
- 239000002245 particle Substances 0.000 claims description 24
- 239000006096 absorbing agent Substances 0.000 claims description 7
- 238000005469 granulation Methods 0.000 claims description 7
- 230000003179 granulation Effects 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000000654 additive Substances 0.000 claims description 5
- 230000000996 additive effect Effects 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 3
- 210000003491 skin Anatomy 0.000 claims description 3
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims description 2
- 229920005990 polystyrene resin Polymers 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 5
- 230000007812 deficiency Effects 0.000 abstract description 2
- 230000032798 delamination Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract description 2
- 239000003595 mist Substances 0.000 description 3
- 230000003678 scratch resistant effect Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004100 electronic packaging Methods 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92609—Dimensions
- B29C2948/92647—Thickness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
Abstract
The percentage elongation that the present invention is directed in prior art the sheet material making carrying belt is low, make the bearing capacity of carrying belt low, needing to thicken carrying belt prevents carrying belt from damaging, make the deficiency that cost increases, a kind of composite sheet for making electrostatic resistant transparent carrying belt and processing method thereof are provided, this composite sheet is by the antistatic upper epidermis of shape all-in-one-piece, antistatic layer and intermediate layer composition, described intermediate layer is made up of by mass percentage following component: GPPS resin 30%-53%, K resin 45%-68%, lubricant 2%-8%, the agent of 0%-2% UV absorbance, 0%-4% light diffusing agent, adopt the sheet material of this component, there is good percentage elongation and bearing capacity, above-mentioned sheet material forms composite sheet by two extruders through same die extrusion, adopts the inventive method to produce carrying belt, is conducive to the high-speed molding of carrying belt, and the carrying belt produced and interlayer not easily delamination.
Description
Technical field
The present invention relates to a kind of composite sheet and processing method thereof, particularly relating to a kind of composite sheet for making antistatic carrying belt and processing method thereof.
Background technology
For the carrying belt packed, as the carrying belt of the electronic devices and components such as packaging IC, certain intensity and toughness need be had.Along with precise treatment, the miniaturization of electronic devices and components, electronic packaging materials also becomes more and more narrow, and the fracture elongation of sheet material in the market only has about 85.0%, for preventing carrying belt in transportation damaged, need to increase its thickness to increase its intensity, cause the cost of carrying belt high, reduce the benefit of enterprise.
Meanwhile, carrying belt need have and prevents electronic devices and components from producing and damaging because being subject to electrostatic in transportation or the ability of contamination by dust.The existing sheet material for the manufacture of electrostatic resistant transparent carrying belt in single sheet, adds antistatic composition make, and its antistatic effect is not lasting.
Existing carrying belt, in order to prevent ultraviolet irradiation, its transparency is low, in transport and sales process not easily clear identify carrying belt built with electronic component, affect the identification to the interior article of packaging.
Summary of the invention
The object of the invention is, percentage elongation for the sheet material making carrying belt in prior art is low, make the bearing capacity of carrying belt low, need thicken carrying belt prevent carrying belt from damaging, make the deficiency that cost increases, there is provided a kind of composite sheet for making electrostatic resistant transparent carrying belt and processing method thereof, he has good percentage elongation and bearing capacity.
The object of the invention is to be achieved through the following technical solutions:
First object of the present invention is, a kind of composite sheet for making antistatic carrying belt is provided, it is made up of intermediate layer, top layer, described top layer is made up of antistatic upper epidermis and antistatic layer, described intermediate layer, antistatic upper epidermis and antistatic layer form one, and described intermediate layer is made up of by mass percentage following component: GPPS resin 30%-53%, K resin 45%-68%, the agent of lubricant 2%-8%, 0%-2% UV absorbance, 0%-4% light diffusing agent;
Further, described intermediate layer is made up of by mass percentage following component: GPPS resin 37%-48%, K resin 47%-58%, lubricant 3%-5%, UV absorbance agent 0%-1%, 2%-4% light diffusing agent;
Further, described top layer is made up of by mass percentage following component, GPPS resin 30%-52%, K resin 45%-67%, the agent of lubricant 2%-10%, 0%-3% UV absorbance, 1%-3% antistatic additive;
Further, described top layer is made up of by mass percentage following component, GPPS resin 40%-47%, K resin 50%-57%, lubricant 2%-5%, UV absorbance agent 0%-3%, antistatic additive 1%-2%.
Second object of the present invention providing a kind of processing method of the composite sheet for making antistatic carrying belt, comprising the steps:
Granulation: in one of the every described ratio of claim 1-4, get the GPPS resin in the component of intermediate layer, K resin, lubricant, UV absorbance agent and top layer each component, intermediate layer component and top layer component carry out granulation respectively, obtain intermediate layer raw materials particles and top layer raw materials particles that particle diameter is less than or equal to 60 microns:
Dry: obtained intermediate layer raw materials particles and top layer raw materials particles are entered baking oven respectively, respectively dry 60-90 minute at 90 ± 10C ° of temperature;
Sheet material is extruded: the intermediate layer raw materials particles of drying and top layer raw materials particles are inserted feeding tube respectively, by two extruders through same die extrusion three layers of composite sheet, interlayer sheet extruder temperature is 195-250C °, skin sheets extruder temperature is 200-250C °, extrudes the sheet material that thickness is 0.2-0.5mm;
Further, in described baking step, before described intermediate layer raw materials particles enters described baking oven, in aforesaid ratio, intermediate layer granulate and light diffusing agent, water absorbing agent are stirred, then reenter baking oven and dry, the consumption of described water absorbing agent is the 0-3% of described intermediate layer component;
Further, in described granulation step, adopt dual-screw pelletizer, the rotating speed of main frame is 30-35 rev/min, and feeding rotating speed is 25-30 rev/min, and melt pressure is 4-6MPa;
Further, upper, middle and lower three roll temperature of described extruder is 50-65C °.
3rd object of the present invention is, a kind of composite sheet for making antistatic carrying belt is provided, it is made up of intermediate layer, antistatic upper epidermis and antistatic layer, and described intermediate layer, antistatic upper epidermis and antistatic layer are made up of preceding method coextrusion compound;
Further, the light transmittance of described sheet material is 82-87%, and mist degree is 6-13%.
Because composite sheet of the present invention is made up as stated above of above-mentioned component, it has good mechanical performance, and its fracture elongation, between 93-130%, improves 10-50% than the percentage elongation of prior art, drastically increases the bearing capacity of carrying belt; Meanwhile, it has applicable light transmittance and mist degree, making the carrying belt by adopting sheet material of the present invention to make both can be clear that in-built article, having again the ability of good antiultraviolet.Sheet material of the present invention, its antistatic effect is lasting.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described:
Composite sheet of the present invention, the Main Ingredients and Appearance on intermediate layer and top layer is polystyrene resin (being called for short GPPS resin) and transparent butadiene-styrene impact resin (being called for short K resin), GPPS resin has the inexpensive feature of light weight, while reducing costs, ensure that mouldability and the stability of sheet material; Add K resin, not only make composite sheet have excellent transparency and improve impact strength and the tensile strength of sheet material, the GPPS resin of proportioning of the present invention and K resin, make the percentage elongation of sheet material be greatly improved; UV absorbance agent improves the sunlight resistance of goods; Lubricant improves the mobility of melt, melt is more easily extruded, add lubricity when sheet material is extruded simultaneously, enhance the scratch-resistant performance of sheet material, especially all lubricant is added in intermediate layer and top layer, the scratch-resistant performance of sheet material is significantly improved, makes the carrying belt of making have good scratch-resistant performance; The light diffusing agent of component of the present invention, while making sheet material have good transparency, has applicable mist degree concurrently, and the visuality of sheet material of the present invention and light-protection are balanced each other.
In invention, adopt two extruding machine meltings, with a bite mould co-extrusion, the technology of three layers of compound, can effectively reduce costs, simplified processing process.Adopt the inventive method to produce carrying belt, be conducive to the high-speed molding of carrying belt, and the carrying belt produced and interlayer not easily delamination.
Embodiment 1
1, raw material are prepared:
Intermediate layer formula for raw stock component is GPPS resin 33%, K resin 59, lubricant 5, UV absorbance agent 1%, light diffusing agent 2%;
Top layer raw material component is: GPPS resin 36%, K resin 56%, lubricant 5%, UV absorbance agent 2%, antistatic additive 1%;
2, granulation:
By the GPPS resin in the raw material of intermediate layer, K resin, lubricant, UV absorbance agent, carry out uniform stirring with screw blender; Pour the material be stirred into dual-screw pelletizer, be extruded into particle, make intermediate layer raw material.Engine speed is at 35 revs/min, and feeding rotating speed 29 revs/min, melt pressure is at 4MPa.Obtained grain diameter is the raw materials particles of less than 60 microns;
Top layer raw material screw blender is carried out uniform stirring; Pour the material be stirred into dual-screw pelletizer, be extruded into particle, make top layer raw material.Engine speed at 31 revs/min, feeding rotating speed 25 revs/min, melt pressure obtains at 5MPa the raw materials particles that grain graininess is 60 microns;
3, dry:
By intermediate layer raw materials particles and light diffusing agent and water absorbing agent mixing and stirring, enter baking oven, drying time, bake out temperature was at 90 degree at 90 minutes;
Wherein the addition of water absorbing agent is by its description, is generally and is no more than 3% of intermediate layer raw material each component gross mass.Also water absorbing agent can not be added.
Pour top layer raw materials particles into baking oven, dry 90 minutes at the temperature of 100 degree;
4, sheet material is extruded:
Intermediate layer raw materials particles after oven dry and top layer feed particles are fed two extruders respectively by feeding tube, then through same die extrusion three layers of composite sheet.Setting interlayer sheet extruder each section of temperature is 195-250 degree, and setting skin sheets extruder temperature is 200-250 degree, and the temperature of extruder upper, middle and lower three roller is 50 ~ 65 degree.The sheet thickness obtained is 0.5mm.
Embodiment 2-8
Intermediate layer raw material component and top layer raw material component and each parameter are shown in embodiment list, and all the other are with embodiment 1.
Table 1: embodiment list
Table 2: the performance table of comparisons
Claims (8)
1. one kind for making the composite sheet of antistatic carrying belt, it is characterized in that, it is made up of intermediate layer, top layer, described top layer is made up of antistatic upper epidermis and antistatic layer, described intermediate layer, antistatic upper epidermis and antistatic layer form one, described intermediate layer is made up of by mass percentage following component: polystyrene resin (GPPS resin) 30%-53%; transparent butadiene-styrene impact resin (K resin) 45%-68%; lubricant 2%-8%; the agent of 0%-2% UV absorbance, 0%-4% light diffusing agent.
2. a kind of composite sheet for making antistatic carrying belt as claimed in claim 1, it is characterized in that, described intermediate layer is made up of by mass percentage following component: GPPS resin 37%-48%, K resin 47%-58%, lubricant 3%-5%, UV absorbance agent 0%-1%, 2%-4% light diffusing agent.
3. a kind of composite sheet for making antistatic carrying belt as claimed in claim 1 or 2, it is characterized in that, described top layer is made up of by mass percentage following component, GPPS resin 30%-52%, K resin 45%-67%, the agent of lubricant 2%-10%, 0%-3% UV absorbance, 1%-3% antistatic additive.
4. a kind of composite sheet for making antistatic carrying belt as claimed in claim 3, it is characterized in that, described top layer is made up of by mass percentage following component, GPPS resin 40%-47%, K resin 50%-57%, lubricant 2%-5%, UV absorbance agent 0%-3%, antistatic additive 1%-2%.
5. for making a processing method for the composite sheet of antistatic carrying belt, it is characterized in that, comprising the steps:
Granulation: get the GPPS resin in claim 1 or 2 intermediate layer component, K resin, lubricant, UV absorbance agent, get claim 3 or 4 top layer each component, intermediate layer component and top layer component carry out granulation respectively, obtain intermediate layer raw materials particles and top layer raw materials particles that particle diameter is less than or equal to 60 microns:
Dry: obtained intermediate layer raw materials particles and top layer raw materials particles are entered baking oven respectively, respectively dry 60-90 minute at 90 ± 10 DEG C of temperature;
Sheet material is extruded: the intermediate layer raw materials particles of drying and top layer raw materials particles are inserted feeding tube respectively, by two extruders through same die extrusion three layers of composite sheet, interlayer sheet extruder temperature is 195-250 DEG C, skin sheets extruder temperature is 200-250 DEG C, extrudes the sheet material that thickness is 0.2-0.5mm.
6. the processing method of a kind of composite sheet for making antistatic carrying belt as claimed in claim 5, it is characterized in that, in described baking step, before described intermediate layer raw materials particles enters described baking oven, in one of the every described ratio of claim 1-2, intermediate layer granulate and light diffusing agent, water absorbing agent are stirred, then reenter baking oven and dry, the consumption of water absorbing agent is the 0-3% of intermediate layer component.
7. the processing method of a kind of composite sheet for making antistatic carrying belt as claimed in claim 5, is characterized in that, in described granulation step; adopt dual-screw pelletizer; the rotating speed of main frame is 30-35 rev/min, and feeding rotating speed is 25-30 rev/min, and melt pressure is 4-6MPa.
8. the processing method of a kind of composite sheet for making antistatic carrying belt as claimed in claim 7, it is characterized in that, upper, middle and lower three roll temperature of described extruder is 50-65 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210437182.XA CN102922837B (en) | 2012-11-05 | 2012-11-05 | For making composite sheet and the processing method thereof of antistatic carrying belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210437182.XA CN102922837B (en) | 2012-11-05 | 2012-11-05 | For making composite sheet and the processing method thereof of antistatic carrying belt |
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| Publication Number | Publication Date |
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| CN102922837A CN102922837A (en) | 2013-02-13 |
| CN102922837B true CN102922837B (en) | 2015-07-29 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103275400B (en) * | 2013-05-17 | 2016-03-09 | 浦江亿通塑胶电子有限公司 | The making method of TPV, TPV thermoplastic elastomer composite sheet, TPV thermoplastic elastomer composite sheet |
| CN105733118B (en) * | 2016-02-29 | 2018-08-14 | 金发科技股份有限公司 | A kind of K resin combinations and the preparation method and application thereof |
| CN105820453B (en) * | 2016-03-31 | 2019-05-17 | 广东帝通新材料股份有限公司 | Transparent antistatic electronic carrier tape sheet material and preparation method |
| CN107915912B (en) * | 2016-12-27 | 2019-06-18 | 金发科技股份有限公司 | A kind of polyphenylacetylene combination and its application |
| CN109421287A (en) * | 2017-08-22 | 2019-03-05 | 毛丛敏 | A kind of production method for the PC sheet material of matt after thermoforming |
| TW201945247A (en) * | 2018-04-26 | 2019-12-01 | 俊馳材料科技股份有限公司 | Carrier tape and method for forming the same |
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| CN101475721A (en) * | 2009-01-13 | 2009-07-08 | 浙江三和塑料有限公司 | Antistatic plastic for SMT carrier band, and preparation and use thereof |
| CN102153821A (en) * | 2011-02-17 | 2011-08-17 | 合肥美菱股份有限公司 | Modified polystyrene material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4520868B2 (en) * | 2005-01-26 | 2010-08-11 | 電気化学工業株式会社 | Composite sheet |
| CN100439094C (en) * | 2005-08-09 | 2008-12-03 | 浙江三和塑料有限公司 | Black-less permanent antielectro-static plastic sheet and its preparation method |
| KR20070094330A (en) * | 2006-03-17 | 2007-09-20 | 쓰리엠 이노베이티브 프로퍼티즈 캄파니 | Easy releasable carrier tape with high impact strength |
| CN201559881U (en) * | 2009-11-19 | 2010-08-25 | 毛丛敏 | Carrying tape for packaging electronic components |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101475721A (en) * | 2009-01-13 | 2009-07-08 | 浙江三和塑料有限公司 | Antistatic plastic for SMT carrier band, and preparation and use thereof |
| CN102153821A (en) * | 2011-02-17 | 2011-08-17 | 合肥美菱股份有限公司 | Modified polystyrene material |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Composite sheet material and processing method for producing anti-static load-bearing belts Effective date of registration: 20230626 Granted publication date: 20150729 Pledgee: Pujiang County Sub branch of Postal Savings Bank of China Co.,Ltd. Pledgor: PUJIANG YITONG PLASTIC ELECTRONIC Co.,Ltd. Registration number: Y2023980045567 |
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Address after: No. 1068, yidianhong Avenue, Pujiang County, Jinhua City, Zhejiang Province 322200 Patentee after: Zhejiang Yitong New Materials Technology Co.,Ltd. Country or region after: China Address before: No. 179 Jinlei Avenue, Economic Development Zone, Pujiang County, Jinhua City, Zhejiang Province, 322200 Patentee before: PUJIANG YITONG PLASTIC ELECTRONIC Co.,Ltd. Country or region before: China |
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