CN104552674A - Shoe sole molding method - Google Patents
Shoe sole molding method Download PDFInfo
- Publication number
- CN104552674A CN104552674A CN201410748748.XA CN201410748748A CN104552674A CN 104552674 A CN104552674 A CN 104552674A CN 201410748748 A CN201410748748 A CN 201410748748A CN 104552674 A CN104552674 A CN 104552674A
- Authority
- CN
- China
- Prior art keywords
- film
- mould
- egative film
- tpu film
- heated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000000465 moulding Methods 0.000 title claims abstract description 14
- 238000005187 foaming Methods 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 claims abstract description 17
- 229920002635 polyurethane Polymers 0.000 claims abstract description 13
- 239000004814 polyurethane Substances 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 239000003292 glue Substances 0.000 claims description 20
- 239000006260 foam Substances 0.000 claims description 10
- 239000012943 hotmelt Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000010409 thin film Substances 0.000 abstract 3
- 229920003225 polyurethane elastomer Polymers 0.000 description 2
- 241001232787 Epiphragma Species 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
The invention discloses a shoe sole molding method. The invention aims to provide a shoe sole molding method which can be used for saving manpower and is simple and convenient as well as a product and mold structure thereof. The shoe sole molding method comprises the following steps: firstly heating a mold to 45-55 DEG C; then putting a base piece on a bottom mold, covering the base piece by using a TPU thin film, covering the base mold by using a middle frame, performing sealing by virtue of a sealing ring, covering an upper cover downwards, and fixing the upper cover by virtue of a fixed fastener; heating the mold again by virtue of a heating channel to ensure that the temperature of the mold reaches 180-200 DEG C; continuously heating the mold by virtue of the heating channel, and then performing vacuum suction on the mold to ensure that the TPU thin film is adhered to the base piece; and finally pouring polyurethane into a mold cavity to ensure that polyurethane is subjected to foaming and characteristic determination in the mold cavity and ensure that the base piece and the TPU thin film are further adhered by virtue of the heat and pressure produced in a foaming process of polyurethane. The shoe sole molding method disclosed by the invention is mainly applied to the production of shoe soles.
Description
Technical field
The present invention relates to a kind of sole processing method, particularly relate to a kind of Sole moulding method.
Background technology
Present sole utilizes polyurethane elastomer to make usually, polyurethane elastomer has density, low elasticity is good, the not at all easy distortion of compression ratio, the irreplaceable advantage of good stability of the dimension etc. other materials, but its production is that two kinds of liquid charging stocks are foamed by chemical reaction footwear and generate, be therefore difficult to solve in product the foaming line leaving bubble, lack the flaws such as material and stay.Can only be made up by secondary operations such as repairing, spray paint, waste a lot of financial resources, material resources are with artificial, applicant also devises a production method that directly can use a mould molding sole before, but because of the shortage of existing human resources, its egative film brush coating technique needs a large amount of skilled craftsman to complete also to be affected to some extent on output.
Summary of the invention
The invention discloses a kind of Sole moulding method, in order to solve the deficiencies in the prior art.
For solving the problem, technical solution of the present invention is:
A kind of Sole moulding method, its first production method is:
First 45 DEG C-55 DEG C are heated to mould; Secondly be positioned on bed die by egative film, TPU film is placed on bed die, and center is covered bed die, and is sealed by sealing ring, is fixed by attachment fastener; Again mould is heated by heat tunnel, make TPU film temperature reach 180 DEG C-200 DEG C; Mould is inhaled vacuum, TPU film and die cavity and egative film are adsorbed; In the most backward die cavity, to make it foam in die cavity qualitative for filling polyurethane, bonded further egative film and TPU film by the heat that produces during foaming and pressure;
Its second production method is:
First 45 DEG C-55 DEG C are heated to mould; Secondly be positioned on bed die by egative film, TPU film bottom surface glue spraying also covers on egative film, and center is covered bed die, and is sealed by sealing ring, is built downwards by upper cover, is fixed by attachment fastener; Again mould is heated by heat tunnel, make mold temperature reach 60 DEG C-80 DEG C; Then after being heated by heat tunnel, mould is inhaled vacuum, TPU film and egative film are bonded; In the most backward die cavity, to make it foam in die cavity qualitative for filling polyurethane, bonded further egative film and TPU film by the heat that produces during foaming and pressure;
Its third production method is:
First 45 DEG C-55 DEG C are heated to mould; Secondly be positioned on bed die by egative film, TPU film bottom surface glue spraying also covers on egative film, and center is covered bed die, and is sealed by sealing ring, is built downwards by upper cover, is fixed by attachment fastener; Again mould is heated by heat tunnel, make mold temperature reach 60 DEG C-80 DEG C; Then hot melt glue is injected by being arranged at the glue inlet tube of position between egative film and tpu film between center and bed die, and after being heated by heat tunnel, mould is inhaled vacuum, TPU film and egative film are bonded, and its unnecessary hot melt glue can flow out mould by glue inlet tube; In the most backward die cavity, to make it foam in die cavity qualitative for filling polyurethane, bonded further egative film and TPU film by the heat that produces during foaming and pressure.
Described egative film is that a kind of sticking material of rear tool that heats is made.
Described egative film makes after eva mixes by 3:1 with rubber.
Described first method makes mould in heat tunnel, makes tpu film at least reach 185 DEG C.
Described tpu film thickness is 0.05-0.18mm.
Described tpu film thickness is 0.8-1mm.
Described tpu film thickness is 0.85mm.
Take out sole after described foaming and setting through 60-70 DEG C of baking oven, pressing machine is with 20kg-25kg/cm
2pressure pressing; Described heat tunnel is carbon fibre heating tube heat tunnel.
The invention has the beneficial effects as follows: solve because its stress reason decorative pattern is unintelligible when TPU film is adsorbed onto die surface by design of the present invention, the problems such as product contracting receipts; Product completes bonding in same mould, substantially increases production efficiency and saves artificial and time, also greatly improving the aesthetic of product and the adhesion stability of product, saving manpower, reduces technique to the dependence of skilled craftsman.
Detailed description of the invention
Below the specific embodiment of the present invention is described in further detail.
Technical solution of the present invention is:
A kind of Sole moulding method, its first production method is:
First 45 DEG C-55 DEG C are heated to mould; Secondly be positioned on bed die by egative film, TPU film is placed on bed die, and center is covered bed die, and is sealed by sealing ring, is fixed by attachment fastener; Again mould is heated by heat tunnel, make TPU film temperature reach 180 DEG C-200 DEG C; Mould is inhaled vacuum, TPU film and die cavity and egative film are adsorbed; In the most backward die cavity, to make it foam in die cavity qualitative for filling polyurethane, bonded further egative film and TPU film by the heat that produces during foaming and pressure;
Its second production method is:
First 45 DEG C-55 DEG C are heated to mould; Secondly be positioned on bed die by egative film, TPU film bottom surface glue spraying also covers on egative film, and center is covered bed die, and is sealed by sealing ring, is built downwards by upper cover, is fixed by attachment fastener; Again mould is heated by heat tunnel, make mold temperature reach 60 DEG C-80 DEG C; Then after being heated by heat tunnel, mould is inhaled vacuum, TPU film and egative film are bonded; In the most backward die cavity, to make it foam in die cavity qualitative for filling polyurethane, bonded further egative film and TPU film by the heat that produces during foaming and pressure;
Its third production method is:
First 45 DEG C-55 DEG C are heated to mould; Secondly be positioned on bed die by egative film, TPU film bottom surface glue spraying also covers on egative film, and center is covered bed die, and is sealed by sealing ring, is built downwards by upper cover, is fixed by attachment fastener; Again mould is heated by heat tunnel, make mold temperature reach 60 DEG C-80 DEG C; Then hot melt glue is injected by being arranged at the glue inlet tube of position between egative film and tpu film between center and bed die, and after being heated by heat tunnel, mould is inhaled vacuum, TPU film and egative film are bonded, and its unnecessary hot melt glue can flow out mould by glue inlet tube; In the most backward die cavity, to make it foam in die cavity qualitative for filling polyurethane, bonded further egative film and TPU film by the heat that produces during foaming and pressure.
Described egative film is that a kind of sticking material of rear tool that heats is made.
Described egative film makes after eva mixes by 3:1 with rubber.
Described first method makes mould in heat tunnel, makes tpu film at least reach 185 DEG C.
Described tpu film thickness is 0.05-0.18mm.
Described tpu film thickness is 0.8-1mm.
Described tpu film thickness is 0.85mm.
Take out sole after described foaming and setting through 60-70 DEG C of baking oven, pressing machine is with 20kg-25kg/cm
2pressure pressing; Described heat tunnel is carbon fibre heating tube heat tunnel.
When actual production, by the production of making above-mentioned technological process and carrying out sole, in process of production because tpu film thickness is that its distortion of 0.8-1mm and extended length are less, egative film and tpu film can cement solid by the hot melt glue being coated in tpu film and perfusion when inhaling vacuum, and the heat produced when foaming and pressure make it bond further, glue expansion during bonding in unit are makes its thickness little but rate of drying is fast, bonding strength is high, and the first mode of production is mainly used in producing in enormous quantities and egative film decorative pattern is shallow and simple sole.
After heat tunnel, TPU film is heated to 185-195 DEG C, the inner hydrogen bond of TPU film macromolecule is disappeared, molecular activity, make it to reach the TPU film post forming being adsorbed on mold cavity surfaces when inhaling vacuum, decorative pattern is clear; Carry out suction application of vacuum by the gap between TPU film and bed die, the part being adsorbed on egative film when inhaling vacuum reaches and bottom glue bonding optimum condition.Finally by inhaled vacuum die cavity in filling polyurethane, epiphragma, make it to foam in die cavity, qualitative, the heat produced during foaming and the laminating of pressure to egative film and TPU film provide more consolidation.
Above-mentioned detailed description of the invention is the preferred embodiments of the present invention, can not limit the present invention, and any of other does not deviate from technical scheme of the present invention and the substitute mode of the change made or other equivalence, is included within protection scope of the present invention.
Claims (10)
1. a Sole moulding method, its first production method is:
First 45 DEG C-55 DEG C are heated to mould; Secondly be positioned on bed die by egative film, TPU film is placed on bed die, and center is covered bed die, and is sealed by sealing ring, is fixed by attachment fastener; Again mould is heated by heat tunnel, make TPU film temperature reach 180 DEG C-200 DEG C; Mould is inhaled vacuum, TPU film and die cavity and egative film are adsorbed; In the most backward die cavity, to make it foam in die cavity qualitative for filling polyurethane, bonded further egative film and TPU film by the heat that produces during foaming and pressure.
2. a Sole moulding method, its second production method is:
First 45 DEG C-55 DEG C are heated to mould; Secondly be positioned on bed die by egative film, TPU film bottom surface glue spraying also covers on egative film, and center is covered bed die, and is sealed by sealing ring, is built downwards by upper cover, is fixed by attachment fastener; Again mould is heated by heat tunnel, make mold temperature reach 60 DEG C-80 DEG C; Then after being heated by heat tunnel, mould is inhaled vacuum, TPU film and egative film are bonded; In the most backward die cavity, to make it foam in die cavity qualitative for filling polyurethane, bonded further egative film and TPU film by the heat that produces during foaming and pressure.
3. a Sole moulding method, its third production method is:
First 45 DEG C-55 DEG C are heated to mould; Secondly be positioned on bed die by egative film, TPU film bottom surface glue spraying also covers on egative film, and center is covered bed die, and is sealed by sealing ring, is built downwards by upper cover, is fixed by attachment fastener; Again mould is heated by heat tunnel, make mold temperature reach 60 DEG C-80 DEG C; Then hot melt glue is injected by being arranged at the glue inlet tube of position between egative film and tpu film between center and bed die, and after being heated by heat tunnel, mould is inhaled vacuum, TPU film and egative film are bonded, and its unnecessary hot melt glue can flow out mould by glue inlet tube; In the most backward die cavity, to make it foam in die cavity qualitative for filling polyurethane, bonded further egative film and TPU film by the heat that produces during foaming and pressure.
4. method according to claim 1, is characterized in that: described egative film is that a kind of sticking material of rear tool that heats is made.
5. method according to claim 1, is characterized in that: described egative film makes after eva mixes by 3:1 with rubber.
6. method according to claim 1, is characterized in that: described first method makes mould in heat tunnel, makes tpu film at least reach 185 DEG C.
7. method according to claim 1, is characterized in that: described tpu film thickness is 0.05-0.18mm.
8. the method according to claim 2,3, is characterized in that: described tpu film thickness is 0.8-1mm.
9. the method according to claim 2,3, is characterized in that: described tpu film thickness is 0.85mm.
10. the method according to claim 1,2,3, is characterized in that: take out sole after described foaming and setting through 60-70 DEG C of baking oven, pressing machine is with 20kg-25kg/cm
2pressure pressing; Described heat tunnel is carbon fibre heating tube heat tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410748748.XA CN104552674B (en) | 2013-12-10 | 2014-12-08 | A kind of Sole moulding method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310663107 | 2013-12-10 | ||
| CN201410748748.XA CN104552674B (en) | 2013-12-10 | 2014-12-08 | A kind of Sole moulding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104552674A true CN104552674A (en) | 2015-04-29 |
| CN104552674B CN104552674B (en) | 2015-11-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410748748.XA Active CN104552674B (en) | 2013-12-10 | 2014-12-08 | A kind of Sole moulding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104552674B (en) |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105459318A (en) * | 2015-06-26 | 2016-04-06 | 许建华 | Production method of intra-mould integrally formed double-texture shoe sole |
| CN105500746A (en) * | 2015-12-31 | 2016-04-20 | 王天强 | Preparation method of crease-resistance shoe sole |
| CN105643858A (en) * | 2015-12-31 | 2016-06-08 | 王天强 | Preparation method of paint spraying free shoe sole |
| CN105818312A (en) * | 2016-03-21 | 2016-08-03 | 翡柯机械（福建）有限公司 | Forming method for insulating foam floor panel |
| CN106240109A (en) * | 2016-08-08 | 2016-12-21 | 东莞市博凯鞋材有限公司 | A kind of use vacuum abutted elastic composite body processing technology |
| CN106313409A (en) * | 2016-09-14 | 2017-01-11 | 佛山市南海创意鞋材有限公司 | PU shoe sole laminating and forming process |
| CN106393543A (en) * | 2016-09-14 | 2017-02-15 | 佛山市南海创意鞋材有限公司 | Integrated forming technology for combined shoe sole |
| CN106432831A (en) * | 2016-08-31 | 2017-02-22 | 广州市邦尔福鞋材有限公司 | Rubber for shoe sole and method for preparing shoe sole |
| CN106626204A (en) * | 2016-10-27 | 2017-05-10 | 中山杰伟鞋业有限公司 | Manufacturing method of novel foot bed or shoe pad |
| CN107373881A (en) * | 2017-08-07 | 2017-11-24 | 福建泉州中博新材料有限公司 | A kind of secondary the MD footwear materials and its production technology of overlay film shaping |
| CN107804053A (en) * | 2017-11-09 | 2018-03-16 | 广州钰鑫新材料有限公司 | A kind of EVA shoe bottom of surface covering PU composite membranes and preparation method thereof |
| CN108523304A (en) * | 2017-03-04 | 2018-09-14 | 汕头市昂斯鞋材有限公司 | Film technique for applying is perfused in a kind of PU perfusion film and PU |
| CN108556389A (en) * | 2018-04-09 | 2018-09-21 | 晋江兴迅新材料科技有限公司 | A kind of light weight and the ETPU sole molding process with air cushion appearance |
| CN109093908A (en) * | 2018-08-15 | 2018-12-28 | 东莞市兴茂橡塑科技有限公司 | Mold and sole coating method for sole coating |
| CN109810236A (en) * | 2018-09-21 | 2019-05-28 | 张东井 | A kind of production method of polyurethane shoe-sole and urethane raw for this method |
| CN110861252A (en) * | 2019-11-22 | 2020-03-06 | 广东鹏骏新材料科技有限公司 | Mould for wide edge sole |
| CN111513422A (en) * | 2020-04-28 | 2020-08-11 | 广东鹏骏新材料科技有限公司 | Glue-free foamed sole and manufacturing method thereof |
| CN112721263A (en) * | 2021-01-25 | 2021-04-30 | 德州市鑫华润科技股份有限公司 | Novel shoemaking process |
| CN113386378A (en) * | 2021-06-28 | 2021-09-14 | 广东芯鹰科技有限公司 | Integrated forming process of composite sole |
| WO2022116580A1 (en) * | 2020-12-02 | 2022-06-09 | 浙江华峰新材料有限公司 | Product forming method, product, and shoe |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1174778A (en) * | 1996-08-23 | 1998-03-04 | 德成化学工业株式会社 | Process for preparing sole using polyurethane film and thesole by the process |
-
2014
- 2014-12-08 CN CN201410748748.XA patent/CN104552674B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1174778A (en) * | 1996-08-23 | 1998-03-04 | 德成化学工业株式会社 | Process for preparing sole using polyurethane film and thesole by the process |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105459318A (en) * | 2015-06-26 | 2016-04-06 | 许建华 | Production method of intra-mould integrally formed double-texture shoe sole |
| CN105500746A (en) * | 2015-12-31 | 2016-04-20 | 王天强 | Preparation method of crease-resistance shoe sole |
| CN105643858A (en) * | 2015-12-31 | 2016-06-08 | 王天强 | Preparation method of paint spraying free shoe sole |
| CN105818312A (en) * | 2016-03-21 | 2016-08-03 | 翡柯机械（福建）有限公司 | Forming method for insulating foam floor panel |
| CN106240109A (en) * | 2016-08-08 | 2016-12-21 | 东莞市博凯鞋材有限公司 | A kind of use vacuum abutted elastic composite body processing technology |
| CN106432831A (en) * | 2016-08-31 | 2017-02-22 | 广州市邦尔福鞋材有限公司 | Rubber for shoe sole and method for preparing shoe sole |
| CN106313409A (en) * | 2016-09-14 | 2017-01-11 | 佛山市南海创意鞋材有限公司 | PU shoe sole laminating and forming process |
| CN106393543A (en) * | 2016-09-14 | 2017-02-15 | 佛山市南海创意鞋材有限公司 | Integrated forming technology for combined shoe sole |
| CN106626204A (en) * | 2016-10-27 | 2017-05-10 | 中山杰伟鞋业有限公司 | Manufacturing method of novel foot bed or shoe pad |
| CN108523304A (en) * | 2017-03-04 | 2018-09-14 | 汕头市昂斯鞋材有限公司 | Film technique for applying is perfused in a kind of PU perfusion film and PU |
| CN107373881B (en) * | 2017-08-07 | 2023-09-15 | 福建泉州中博新材料有限公司 | Film-covered formed secondary MD shoe material and production process thereof |
| CN107373881A (en) * | 2017-08-07 | 2017-11-24 | 福建泉州中博新材料有限公司 | A kind of secondary the MD footwear materials and its production technology of overlay film shaping |
| CN107804053A (en) * | 2017-11-09 | 2018-03-16 | 广州钰鑫新材料有限公司 | A kind of EVA shoe bottom of surface covering PU composite membranes and preparation method thereof |
| CN108556389A (en) * | 2018-04-09 | 2018-09-21 | 晋江兴迅新材料科技有限公司 | A kind of light weight and the ETPU sole molding process with air cushion appearance |
| CN109093908A (en) * | 2018-08-15 | 2018-12-28 | 东莞市兴茂橡塑科技有限公司 | Mold and sole coating method for sole coating |
| CN109810236A (en) * | 2018-09-21 | 2019-05-28 | 张东井 | A kind of production method of polyurethane shoe-sole and urethane raw for this method |
| CN109810236B (en) * | 2018-09-21 | 2022-04-12 | 张东井 | Method for manufacturing polyurethane sole and polyurethane raw material used for method |
| CN110861252A (en) * | 2019-11-22 | 2020-03-06 | 广东鹏骏新材料科技有限公司 | Mould for wide edge sole |
| CN111513422A (en) * | 2020-04-28 | 2020-08-11 | 广东鹏骏新材料科技有限公司 | Glue-free foamed sole and manufacturing method thereof |
| WO2022116580A1 (en) * | 2020-12-02 | 2022-06-09 | 浙江华峰新材料有限公司 | Product forming method, product, and shoe |
| CN112721263A (en) * | 2021-01-25 | 2021-04-30 | 德州市鑫华润科技股份有限公司 | Novel shoemaking process |
| CN113386378A (en) * | 2021-06-28 | 2021-09-14 | 广东芯鹰科技有限公司 | Integrated forming process of composite sole |
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|---|---|
| CN104552674B (en) | 2015-11-04 |
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Effective date of registration: 20170620 Address after: 510000, Guangdong, Guangzhou Baiyun District, Tai Wo Zhenlong Garden Road, East D5 No. 42 building Patentee after: Guangzhou Peng Jun shoe materials Co., Ltd. Address before: Belvedere Road, Baiyun District of Guangzhou City, Guangdong Province, No. 53 room 804 Patentee before: Wu Wenjie |
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Address after: 526000 Workshop 3, Zhaoqing Moore Composite New Materials Co., Ltd., No. 16 Longhu Avenue, Zhaoqing High-tech Zone, Guangdong Province Patentee after: Guangdong Pengjun New Materials Technology Co., Ltd. Address before: 510000 2nd Floor, D5 East Longguiyuan Summer Avenue, Taihe Town, Baiyun District, Guangzhou City, Guangdong Province Patentee before: Guangzhou Peng Jun shoe materials Co., Ltd. |
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