CN101067020A - Method and device for reusing waste polyester in continuous polyester producing apparatus - Google Patents
Method and device for reusing waste polyester in continuous polyester producing apparatus Download PDFInfo
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- CN101067020A CN101067020A CN 200710067966 CN200710067966A CN101067020A CN 101067020 A CN101067020 A CN 101067020A CN 200710067966 CN200710067966 CN 200710067966 CN 200710067966 A CN200710067966 A CN 200710067966A CN 101067020 A CN101067020 A CN 101067020A
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- polyester
- waste material
- esterifier
- encloses container
- screw conveyor
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- 229920000728 polyester Polymers 0.000 title claims abstract description 127
- 239000002699 waste material Substances 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims description 36
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 238000010924 continuous production Methods 0.000 claims description 11
- 238000004064 recycling Methods 0.000 claims description 8
- 230000032050 esterification Effects 0.000 abstract description 17
- 238000005886 esterification reaction Methods 0.000 abstract description 17
- 238000003723 Smelting Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 238000006116 polymerization reaction Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 4
- -1 polyethylene terephthalate Polymers 0.000 description 4
- 238000010009 beating Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 150000007942 carboxylates Chemical class 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- FLIPBIHUNOYCJI-UHFFFAOYSA-N chloroform;2-chlorophenol Chemical compound ClC(Cl)Cl.OC1=CC=CC=C1Cl FLIPBIHUNOYCJI-UHFFFAOYSA-N 0.000 description 2
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005227 gel permeation chromatography Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920002215 polytrimethylene terephthalate Polymers 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Polyesters Or Polycarbonates (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The present invention relates to method and set for reusing waste polyester in continuous polyester producing apparatus, and solves the technological problem of using waste polyester in the esterification directly without being smelting. The reusing method features that waste polyester is thrown into a sealed container and conveyed through a connected screw conveyer to the esterification reactor, with the sealed container being protected with nitrogen and maintained in the same pressure as the esterification reactor. The waste polyester reusing set includes a nitrogen pipeline, a sealed container, a screw conveyer and a esterification reactor connected successively with valve between two adjacent parts.
Description
Technical field
The invention belongs to the organic high molecular compound production field, relate to the recovery and utilization technology of polyester waste material, specifically a kind of polyester waste material is recycling method and device thereof on polyester continuous production equipment.
Background technology
Polyester has good thermotolerance, processibility, the transparency, nontoxic, erosion resistance etc., is widely used in fields such as fiber, film, polyester bottles, and polyester has become the kind of output maximum in the synthon.Along with the production of polyester ability increases, the production of polyester waste material becomes the problem of people's care also in continuous increase to the recycling of polyester waste material.Along with the increase of production of polyester producer polyester output, its polyester waste material also rolls up.Not influencing under the product quality premise, how these waste materials are being recycled on this enterprise polyester production facility, also is the problem that production of polyester enterprise is concerned about.
Chinese patent literature CN1585793 " uses waste material to produce transparent polyester ", CN1585797 " uses waste material continuous production transparent polyester " and described a kind of method for making polyester that comprises 50% (weight) transparent recycled waste polyester by new balance depolymerization method preparation, to after the thawing of transparent polyester waste material process forcing machine it be extruded the fluid of the oligopolymer of supplying with the polymerization degree at least 1.5 continuously, finish esterification continuously, produce prepolymer, the described prepolymer of successive polymerization is produced transparent food grade polyester.This method is used transparent waste production of polyester transparent food level polyester, and the transparent waste polyester melts with forcing machine makes waste material supply with the single esterifier later stage with melting state.Owing to use forcing machine to melt waste material, it is preceding to transparent waste polyester drying to need forcing machine to melt, and charging under nitrogen atmosphere, complicated operation, and forcing machine melts waste material simultaneously, because polyester produces thermal destruction or oxidation, causes quality product decline.
Summary of the invention
The technical issues that need to address of the present invention are that polyester waste material does not need to melt and directly with the esterification of solid-state form supply production of polyester, realizes recycling.
Polyester waste material of the present invention is recycling method on polyester continuous production equipment, it is characterized in that: polyester waste material drops into encloses container, supplies with (in the production of polyester line) esterifier continuously by the screw conveyor that is attached thereto; Encloses container keeps identical pressure with nitrogen protection and with esterifier.Its benefit is that polyester waste material does not need to melt, and directly supplies with the esterifier of production of polyester with solid-state form.
Polyester waste material can be the useless piece of polyester, bottle sheet, useless polyester filament, useless short fiber.Preferably use useless piece of the polyester identical or polyester not to have oily waste silk with online product component.As preferably, pulverized before the polyester waste material input, pulverize granulating through particle less than 5mm.
As preferably, the polyester waste material addition is 10～30% of a production of polyester total amount.
The device of polyester waste material of the present invention reuse on polyester continuous production equipment is characterized in that nitrogen pipeline, encloses container, and screw conveyor is connected successively with esterifier four part parts, is provided with valve between the two adjacent part parts.As preferably, encloses container has two to be connected in parallel with screw conveyor, and they are used alternatingly, and can enhance productivity.
Realize that encloses container and esterifier keep uniform pressure, artificial supervision, adjusting also can reach, as preferably, there is a pressure to regulate maincenter and is connected respectively with esterifier with regulated valve, to improve timely, the accurate and automatization of regulating with signal wire.
Detailed Description Of The Invention
Polyester production facility is that the production of polyester field is known altogether.Esterifier can be general three stills (esterifying kettle, a prepolymerization kettle, a final polymeric kettle), four stills (two esterifying kettles, a prepolymerization kettle, a final polymeric kettle), five stills (two esterifying kettles, two prepolymerization kettles, a final polymeric kettle) flow process.The slurry preparation that generally comprises raw material terephthalic acid, ethylene glycol, slurry is supplied with esterifier continuously, and the water that reaction produces is deviate from esterification under 255～280 ℃, 0～0.15Mpa condition simultaneously, form the carboxylate of esterification yield 92～98%, 90～180 minutes esterification residence time.Esterification can be that a reactor also can be two reactors.Carboxylate is supplied with pre-polymerization reactor continuously, forms oligopolymer under 270～285 ℃, 1～10kpa condition, supplies with eventually poly-reactor then, and polymerization generates the polymer polyester of regulation viscosity under 275～290 ℃, 50～150pa condition.
The product that polyester equipment is produced can be the kind that this field is known altogether.Can be glossy polyester, half delustring polyester, full-dull polyester.Can be polyethylene terephthalate (PET), polybutylene terephthalate (PBT), Poly(Trimethylene Terephthalate) (PTT).Except that main raw material, can contain≤other modified components of 0.2 moles/mole main raw material, as m-phthalic acid, hexanodioic acid, glycol ether, neopentyl glycol etc.
The polyester waste material of direct reuse can be totally useless piece, bottle sheet, waste silk polyester waste materials such as (long filament or short fibers) on polyester equipment.Useless piece of preferably identical with this polyester equipment product component polyester or polyester do not have the oil silk, can not carry out any separation like this or clean direct reuse, and not change the composition of polyester equipment product.
Polyester waste material enters encloses container, by screw conveyor polyester waste material is supplied with the esterifier of production of polyester continuously, if two esterifiers are arranged, then supplies with first esterifier.Polyester waste material is directly supplied with esterifier with solid-state form.Polyester waste material in esterifier by with reactor in contacting of material realize depolymerization, mix.Through esterifier, generate carboxylate, generate polyester polymers through polyreaction then.
Polyester waste material can account for 10～30% of production of polyester total amount.Because polyester waste material is directly supplied with esterifier with solid-state form, in esterifier polyester waste material by with reactor in contacting of material realize mixing depolymerization.The depolymerization of solid waste to and the esterification material evenly need a process, so the add-on of polyester waste material preferably account for polyester material gross weight 30% in.Surpass 30%,, influence the homogeneity of material, and then influence the quality of the finished product, show as the molecular weight of polyesters distribution and broaden because it is too many to contain solids.
For the benefit of screw conveyor is carried, and the useless piece of polyester will be pulverized earlier, pulverizes granulating through the particle less than 5mm, and preferred powder is broken into grain through the particle less than 3mm, supplies with screw conveyor then.Polyester does not have the oil silk can directly supply with screw conveyor.
Because esterifier is generally band and presses reaction; for preventing that the esterification steam from returning into screw conveyor and waste material encloses container; the encloses container of polyester waste material keeps identical pressure with nitrogen protection and with esterifier; can adjust the nitrogen feed rate of waste material encloses container by the pressure of esterifier, keep the waste material encloses container identical with the pressure of esterifier.
Supply with screw conveyor continuously for guaranteeing waste material, can use two waste material encloses container alternative supply screw conveyors, after the waste material of a waste material encloses container uses up, switch and use another, before the switching, make the waste material encloses container identical with nitrogen earlier with the pressure of esterifier.
Because esterification generally has the residence time more than 90 minutes, the Chang residence time can guarantee directly to supply with the polyester solid waste and separate the coalescence uniform mixing in the esterification material like this, forms the fluid of homogeneous, and need not increase any other depolymerization time.
Device of the present invention is ripe, and method is simple, and is easy and simple to handle, and its advantage is that polyester waste material can directly be recovered utilization and not need to change original equipment and technology in former polyester equipment; Polyester waste material does not need to be melted by heat, has saved the energy, can not melt the final quality that influences product because of heat yet.
Description of drawings
Fig. 1 is the inventive method and device synoptic diagram; 1-making beating still among the figure, the 2-esterifier, the 3-screw conveyor, 4, the 5-encloses container, 6-pressure is regulated maincenter.1-1,2-1,3-1,4-1 and 5-1 are valve.4-2 and 5-2 are regulated valve.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples.
Embodiment.The present invention adopts 500 tons/day continuous polycondensation production equipment, has two esterifiers and three polymerization reactors.The device of the reuse that this is routine is, nitrogen pipeline is connected with 5 with encloses container 4 respectively with 5-2 by regulated valve 4-2, encloses container 4 is connected with screw conveyor 3 respectively with 5-1 by valve 4-1 with 5, screw conveyor is connected with esterifier 2 by valve 3-1, and the material of esterifier 2 enters next process through lower valve 2-1.Making beating still 1 is communicated with esterifier 2 by valve 1-1.Regulated valve 4-2,5-2 respectively have signal wire and pressure adjusting maincenter 6 to be connected with esterifier 2.Wherein esterifier 2 and nitrogen tube are with pressure work all the time.
During pressure regulating system work, encloses container 4 or 5 usefulness nitrogen pressure arrive and the esterifier equipressure, the pressure signal of esterifier is regulated maincenter 6 by pressure and is carried out the aperture of regulated valve 4-2 and 5-2, thereby makes the pressure equilibrium of nitrogen pressure and esterifier of encloses container 4 or 5.
Polyester waste material is ground into grain through the particle less than 5mm, puts in the encloses container 4.Polyester waste material is supplied with screw conveyor 3 continuously through valve 4-1, supplies with esterifier 2 continuously by screw conveyor 3 and valve 3-1.Encloses container 4 or 5 is used alternatingly.After waste material used up in the encloses container 4, valve-off 4-1 opened valve 5-1 simultaneously and enables encloses container 5 at once; And in encloses container 4, put into waste material again, and open regulated valve 4-2, standby with being pressurized to the esterifier equipressure behind the nitrogen replacement air.
Production example 1: ethylene glycol and terephthalic acid are supplied with making beating still 1 continuously with 1.4: 1 moles ratio and are carried out slurry preparation.Slurry is supplied with first esterifier, 2 continuous esterifications, esterifier pressure 0.1Mpa continuously.
The useless piece of polyester is pulverized the particle of granulating through 0.3mm with pulverizer, pack into waste material encloses container 4 and 5, and with being pressurized to 0.1Mpa behind the nitrogen replacement air.Pressure with first esterifier is regulated the nitrogen supply regulated valve 4-2 that maincenter 6 is regulated waste material encloses container 4 by pressure, makes the pressure equilibrium of the pressure and first esterifying kettle of waste material encloses container 4.Open valve 4-1, the waste material in the waste material encloses container 4 is supplied with screw conveyor 3 continuously, supplies with first esterifier 2 continuously by screw conveyor 3.
After waste material uses up in the waste material encloses container, close 4-1 immediately, open 5-1 simultaneously, enable encloses container 5, and regulate maincenter 6 with the pressure of first esterifying kettle by pressure and regulate the nitrogen of waste material encloses containers 5 and supply with valve 5-2, waste material in the waste material encloses container 5 is supplied with screw conveyor 3 continuously, supplies with first esterifying kettle 2 continuously by screw conveyor 3.
Add waste material in the encloses container 4 again, standby with being pressurized to 0.1Mpa behind the nitrogen replacement air.
The first esterification material is supplied with the second esterifier esterification continuously, and the second esterifier material is pressed the polyester fondant of general purpose polyester production technique successive polymerization formation characteristic viscosity 0.64.
The operational throughput of screw conveyor 3 is 75 tons/day, adjusts the feed rate of the first esterifier slurry, makes polyester output keep 500 tons/day, and polyester waste material accounts for 15% of production of polyester total amount like this.
100 tons/day melt carries out the polyester slice of direct pelletizing production characteristic viscosity 0.64 in the above-mentioned polyester fondant, remains 400 tons of/day polyester fondants and carries out the POY spinning, produces the POY of 120dtex/36f.The results are shown in Table one.
Production example 2: with reference to production example 1, difference is that the waste material that adopts is that useless polyester does not have the oil silk.Waste silk is directly put into waste material encloses container 4 and 5, supplies with first esterifier 2 continuously by screw conveyor 3.
Production example 3: with reference to production example 1, difference be polyester waste material account for the production of polyester total amount 25%.
Production example 4: with reference to production example 1, difference be polyester waste material account for the production of polyester total amount 35%.
Comparative example 1, with reference to production example 1, different is without waste material production, the results are shown in Table one.
Table 1: polyester slice quality and spinning property are relatively
| Example | The polyester slice quality | Spinning property | ||||
| [η]dl/g | b | -COOH content mol/t | DEG content % | Mw/Mn | ||
| Production example 1 | 0.642 | 1.3 | 22 | 0.97 | 1.35 | Good |
| Production example 2 | 0.641 | 1.2 | 23 | 0.96 | 1.34 | Good |
| Production example 3 | 0.642 | 1.3 | 21.5 | 0.97 | 1.38 | Good |
| Production example 4 | 0.642 | 1.4 | 23 | 1.01 | 1.60 | A phenomenon of wafing is arranged slightly |
| Comparative example 1 | 0.642 | 1.2 | 22 | 0.97 | 1.34 | Good |
By comparative descriptions, polyester waste material can be directly with the solid-state form reuse, and when the polyester waste material addition the production of polyester total amount 30% in the time, do not influence the quality of polyester product.
The performance test methods of the polyester slice of last table is with reference to GB/T14190-93.
Molecular weight of polyesters measure of spread: with the molecular weight distribution of gel chromatography (GPC) mensuration polyester, pillar: ULTRA-Styragel 300 * 7.8mm; Leacheate: ortho chloro phenol-chloroform (1/3).Sample concentration: 2.0mg/mL, solvent: ortho chloro phenol-chloroform (1: 3) mixed solvent.The molecular weight distribution curve that obtains from experiment calculates Mw (weight-average molecular weight) and Mn (number-average molecular weight) respectively, characterizes molecular weight distribution with Mw/Mn.The Mw/Mn value is big more, and the expression molecular weight distribution broadens.
Claims (6)
1, a kind of polyester waste material recycling method on polyester continuous production equipment is characterized in that: polyester waste material drops into encloses container, supplies with esterifier (2) continuously by the screw conveyor (3) that is attached thereto; Encloses container keeps identical pressure with nitrogen protection and with esterifier (2).
2, polyester waste material according to claim 1 recycling method on polyester continuous production equipment is characterized in that being pulverized before the described polyester waste material input.
3, polyester waste material according to claim 1 and 2 recycling method on polyester continuous production equipment is characterized in that described polyester waste material addition is 10～30% of a production of polyester total amount.
4, the device of a kind of polyester waste material reuse on polyester continuous production equipment is characterized in that nitrogen pipeline, encloses container, and screw conveyor (3) is connected successively with esterifier (2) four part parts, is provided with valve between the two adjacent part parts.
5, the device of polyester waste material according to claim 4 reuse on polyester continuous production equipment is characterized in that described encloses container has two (4,5), respectively is connected in parallel by valve and screw conveyor (3).
6, the device of reuse on polyester continuous production equipment according to claim 4 or 5 described polyester waste materials is characterized in that having a pressure to regulate maincenter (6) and is connected respectively with regulated valve (4-2), (5-2) and esterifier (2) with signal wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100679667A CN100516113C (en) | 2007-04-06 | 2007-04-06 | Method and device for reusing waste polyester in continuous polyester producing apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100679667A CN100516113C (en) | 2007-04-06 | 2007-04-06 | Method and device for reusing waste polyester in continuous polyester producing apparatus |
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| Publication Number | Publication Date |
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| CN101067020A true CN101067020A (en) | 2007-11-07 |
| CN100516113C CN100516113C (en) | 2009-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100679667A Active CN100516113C (en) | 2007-04-06 | 2007-04-06 | Method and device for reusing waste polyester in continuous polyester producing apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103668534A (en) * | 2012-08-31 | 2014-03-26 | 福建百宏聚纤科技实业有限公司 | Online recycling method of melt direct-spun oil-free waste silk |
| CN106832397A (en) * | 2015-12-07 | 2017-06-13 | 中国石化仪征化纤有限责任公司 | The method of online reuse PET Polymerization Wastes |
-
2007
- 2007-04-06 CN CNB2007100679667A patent/CN100516113C/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103668534A (en) * | 2012-08-31 | 2014-03-26 | 福建百宏聚纤科技实业有限公司 | Online recycling method of melt direct-spun oil-free waste silk |
| CN106832397A (en) * | 2015-12-07 | 2017-06-13 | 中国石化仪征化纤有限责任公司 | The method of online reuse PET Polymerization Wastes |
| CN106832397B (en) * | 2015-12-07 | 2019-09-20 | 中国石化仪征化纤有限责任公司 | The method of online reuse PET Polymerization Waste |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100516113C (en) | 2009-07-22 |
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Effective date of registration: 20090904 Address after: Hangzhou City, Zhejiang Province, Xiaoshan Yaqian zip code: 311209 Co-patentee after: ZHEJIANG HENGYI POLYMER Co.,Ltd. Patentee after: ZHEJIANG HENGYI GROUP Co.,Ltd. Co-patentee after: ZHEJIANG HENGYI PETROCHEMICAL Co.,Ltd. Address before: Hangzhou City, Zhejiang Province, Xiaoshan Yaqian zip code: 311209 Patentee before: ZHEJIANG HENGYI GROUP Co.,Ltd. |
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Assignee: ZHEJIANG HENGYI HI-TECH MATERIALS Co.,Ltd. Assignor: ZHEJIANG HENGYI GROUP Co.,Ltd.|ZHEJIANG HENGYI POLYMER Co.,Ltd.|ZHEJIANG HENGYI PETROCHEMICAL Co.,Ltd. Contract record no.: 2010330001288 Denomination of invention: Method and device for reusing waste polyester in continuous polyester producing apparatus Granted publication date: 20090722 License type: Exclusive License Open date: 20071107 Record date: 20100708 |
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Address after: Hangzhou City, Zhejiang province 311209 Yaqian town Xiaoshan District Co-patentee after: ZHEJIANG HENGYI POLYMER Co.,Ltd. Patentee after: ZHEJIANG HENGYI GROUP Co.,Ltd. Co-patentee after: ZHEJIANG HENGYI PETROCHEMICAL Co.,Ltd. Address before: Hangzhou City, Zhejiang province 311209 Yaqian town Xiaoshan District Co-patentee before: ZHEJIANG HENGYI POLYMER Co.,Ltd. Patentee before: ZHEJIANG HENGYI GROUP Co.,Ltd. Co-patentee before: ZHEJIANG HENGYI PETROCHEMICAL Co.,Ltd. |
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Effective date of registration: 20200420 Address after: 362000 Jinxing industrial park, Yinglin Town, Jinjiang City, Quanzhou City, Fujian Province Patentee after: Fujian Yijin Chemical Fiber Co.,Ltd. Address before: Hangzhou City, Zhejiang province 311209 Yaqian town Xiaoshan District Co-patentee before: ZHEJIANG HENGYI POLYMER Co.,Ltd. Patentee before: ZHEJIANG HENGYI GROUP Co.,Ltd. Co-patentee before: ZHEJIANG HENGYI PETROCHEMICAL Co.,Ltd. |