CN102392310A - Method for preparing regenerated polyester chips by utilizing waste pure polyester textiles - Google Patents
Method for preparing regenerated polyester chips by utilizing waste pure polyester textiles Download PDFInfo
- Publication number
- CN102392310A CN102392310A CN2011101774913A CN201110177491A CN102392310A CN 102392310 A CN102392310 A CN 102392310A CN 2011101774913 A CN2011101774913 A CN 2011101774913A CN 201110177491 A CN201110177491 A CN 201110177491A CN 102392310 A CN102392310 A CN 102392310A
- Authority
- CN
- China
- Prior art keywords
- terylene
- textiles
- fusion
- temperature
- melt
- 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.)
- Pending
Links
Abstract
The invention discloses a method for preparing regenerated polyester chips by utilizing waste pure polyester textiles. The main component of the waste pure polyester textiles is polyethylene terephthalate. The method comprises the following steps: degassing and melting the waste pure polyester textiles to obtain polyester melts; and granulating the polyester melts after polycondensation is carried out on the polyester melts, thus obtaining the regenerated polyester chips. The method disclosed by the invention has the following advantages: the regenerated polyester chips can be successfully prepared by utilizing the waste pure polyester textiles; and the intrinsic viscosity of the regenerated polyester chips can reach 0.65-0.70dL/g, thus meeting the requirement for chemical fiber spinning.
Description
Technical field
The present invention relates to a kind of method for preparing terylene chips, be specifically related to a kind of method of utilizing waste and old pure terylene textiles to prepare the regenerated terylene section.
Background technology
China is a weaving big country, the big country that wears the clothes, and it is estimated more than 2,000 ten thousand tons of the quantity of annual waste textile nearly; The overwhelming majority is failed effective recycling; Cause the waste textile enormous amount, not only contaminated environment, occupy a large amount of storage spaces, and cause the great wasting of resources.Wherein, the terylene class textiles that proportion is very high is owing to can not degrade, and environmental pollution will produce significant impact.
In recent years, China's textile industry has been carried out a large amount of exploration work aspect resources conservation, obtained certain achievement, and wherein the recycling of waste textile mainly shows following two aspects: the one, and the comprehensive utilization of textile textiles.Main representative is area, Cangnan, China Zhejiang, and the annual textile waste of handling reaches the hundreds of thousands ton.Main method be with textiles through physical methods such as shreddings, process regeneration staple, with regeneration cotton fiber and other fiber blends, make thicker denim of yarn count or nonwoven fabric etc.The 2nd, the utilization of terylene textile scraps.Earlier polyester fabric is carried out granule, carry out spinning through traditional chemical fibre spinning process again, because inherent viscosity has only 0.43dL/g behind the textiles granule, therefore this method can only spinning short fiber, and intensity is far below normal value.The 3rd, the regeneration of polyester bottle slice.Since the eighties in 20th century, China has begun polyester (PET) recycling work, has formed the scale that aggregated capacity surpasses 3,000,000 tons to China in 2007.Emerged at present the leading enterprise of a collection of recycling; Ground such as Jiangyin, Jiangsu, Ningbo of Zhejiang, Cixi have had the man enterprise of number to form the regeneration suitability for industrialized production ability of polyester bottles; Have complete production line; With the polyester bottles that reclaims pulverize, series of process processing such as cleaning, tackify, spinning, the recycled polyester silk can be used for weaving, stuffing and non-weaving cloth production.Represent technology of Chinese patent CN200610152509.3 and CN200410079094.2.If spinning filament yarn, need to increase a cover liquid phase homogenize still, the bottle sheet of different molecular weight is carried out spinning again after the homogenize, of Chinese patent CN201010105259.4 and CN201020107868.9.
The recycling research of external waste polyester is many; The main chemical method that adopts promptly through various chemical methodes such as Hydrolyze method, alcoholysis method, supercritical fluid methods, will be discarded terylene and be degraded into oligomer or monomer; Shortcoming is a long flow path; Cost is high, and added value of product is low, never applies in China.Deutsche Bundespatent CN99105533.0 has invented a kind of useless polyester recycling method; The useless polyester that is about to contain moisture carries out fusion through single screw extrusion machine; Because large quantity of moisture exists, significantly water degraded of polyester fondant is filtered the back then and is got into polycondensation reactor; Through adding a certain proportion of ethylene glycol, realize the purpose of polycondensation.Shortcoming is, moisture degraded and thermal degradation that screw rod is interval have increased the end carboxyl of melt greatly, do not utilize follow-up polycondensation reaction, so its product can only reach 0.65dl/g, and the 2nd, the interpolation of materials such as ethylene glycol has significantly increased production cost.
The recycling difficulty of waste and old terylene textiles is very big, and the one, its inherent viscosity has only 0.57dL/g, far below the inherent viscosity (0.8dL/g) of polyester bottle slice, can't utilize through traditional spinning (requiring more than the inherent viscosity 0.65dL/g) method again; The 2nd, textiles material unit packing ratio is very big, can't feed screw rod and carry out fusion; The 3rd, moisture degraded and thermal degradation produce a large amount of end carboxyls, do not utilize next step polycondensation reaction.
Summary of the invention
The purpose of this invention is to provide a kind of method of utilizing waste and old pure terylene textiles to prepare the regenerated terylene section.
A kind of method of utilizing waste and old pure terylene textiles to prepare the regenerated terylene section provided by the invention; The main component of said waste and old pure terylene textiles is a PETG, comprises the steps: the fusion that outgases of said waste and old pure terylene textiles is obtained the terylene melt; Said terylene melt carries out polycondensation reaction after granulation promptly gets said regenerated terylene section.
In the above-mentioned method, can said waste and old pure terylene textiles be chopped into surface area is 4cm
2-5cm
2Sheet after send into again in the device of said degassing fusion.
In the above-mentioned method, said degassing fusion step can comprise dry degassing step and fusion step successively; The vacuum of said fusion step can be 200Pa-300Pa, like 200Pa, 250Pa or 300Pa.
In the above-mentioned method, the temperature of said dry degassing step can be 160 ℃-200 ℃, and as 160 ℃, 180 ℃ or 200 ℃, the rotating speed of the screw rod in the said dry degassing step can be 100r/min or 120r/min, like 100r/min-120r/min; Said fusion steps in sequence can comprise melt zone, vacuum exhaust section, changeover portion and mixing metering section; The temperature of said melt zone can be 265 ℃, and the temperature of said vacuum exhaust section can be 265 ℃, and the temperature of said changeover portion can be 270 ℃, and the temperature of said mixing metering section can be 275 ℃.
In the above-mentioned method, can send in the device of said degassing fusion through the forced feed mechanism said waste and old pure terylene textiles that the unit packing ratio is very big; Said forced feed mechanism comprises drawing-in device and agitating device; Said drawing-in device is used for the fluffy materials pressurization, the equal and quantitative feeding, and its rotating speed can be 70r/min-90r/min, like 70r/min, 80r/min or 90r/min; Said agitating device can prevent the fluffy materials bridge formation, improves the charging uniformity, and its rotating speed can be 15r/min-25r/min, like 15r/min, 20r/min or 25r/min.
In the above-mentioned method, said method also comprises the step of said terylene melt through the melt filtration device; The aperture of said melt filtration device can be 40 μ m-50 μ m, like 40 μ m, 45 μ m or 50 μ m.
In the above-mentioned method, said polycondensation reaction can be carried out in the horizontal reacting still, and the rotating speed of the agitator of said horizontal reacting still can be 2.5r/min-3r/min, like 2.5r/min or 3r/min; The temperature of said polycondensation reaction can be 295 ℃, and vacuum can be 10Pa-20Pa, like 10Pa or 20Pa.
In the above-mentioned method, said method also comprises the step of the product process secondary melt filtration device that said polycondensation reaction is obtained; The aperture of said secondary melt filtration device can be 35 μ m-40 μ m, like 35 μ m or 40 μ m
In the above-mentioned method, said granulation can be carried out in end of extruded band.
The present invention is owing to take above technical scheme, and it has the following advantages:
Method provided by the invention, but the waste and old pure terylene textiles of successful use prepares the regenerated terylene section, and its inherent viscosity can reach 0.65dL/g-0.70dL/g, satisfies the chemical fibre spinning requirement.The present invention adopts the forced feed method, can send in the screw rod by the waste and old pure terylene textiles that the unit packing ratio is very big.Degassing fusion technology can have been saved the required mass energy consumption of dry materials operation at venting steam before the terylene fusion in the inventive method, has also effectively avoided the moisture degraded in the terylene melting process.The present invention adopts the liquid phase polymerization technology, has effectively increased the molecular weight of terylene melt, has improved the quality of polyester.
The specific embodiment
Employed experimental technique is conventional method like no specified otherwise among the following embodiment.
Used material, reagent etc. like no specified otherwise, all can obtain from commercial sources among the following embodiment.
Embodiment 1, prepare regenerated terylene section by the waste and old pure terylene textiles of white
(area is approximately 4cm with the pure terylene cloth waste sheet of clean dry
2) send into feed bin with the speed of 300Kg/h, pure terylene cloth waste sheet is sent in the device of degassing fusion through forced feed mechanism; Wherein, this forced feed mechanism comprises drawing-in device and agitating device, and the rotating speed of control drawing-in device is 70r/min, and the rotating speed of agitating device is 15r/min; Degassing fusion step comprises dry degassing step and fusion step, and wherein, the temperature of dry degassing step is 160 ℃, and the rotating speed that is used for the screw rod of dry degassing step is 100 rev/mins; The fusion step comprises melt zone, and temperature is 265 ℃, and vacuum exhaust section, temperature are 265 ℃, changeover portion, and temperature is 270 ℃ and mixing metering section, temperature is 275 ℃; The vacuum of fusion step remains 250Pa; The melt that degassing fusion is obtained is the fondant filter of 40 μ m through the aperture, gets into polycondensation reaction device then: the horizontal reacting still, and the control temperature is 295 ℃, and mixing speed is 2.5 rev/mins, and vacuum is 10Pa; After in-line viscometer detected, be up-to-standard, the product that polycondensation reaction is obtained was through fondant filter, and its aperture is 35 μ m, got into end of extruded band then and carried out granulation and promptly get regenerated terylene and cut into slices.
Through test, inherent viscosity is 0.70dL/g, 258 ℃ of fusing points, and ash content 0.03%, iron divides 4mg/Kg, satisfies the specification requirement of GB/T14189-2008 " fiber polyester chip ".
Utilize above-mentioned regenerated terylene section the carrying out continuous yarn spinning test that obtains, the spinnerets specification is 170dtex/24f, and winding speed is 1100m/min; 3 times of drafting multiples; Finally recording the long filament physical and mechanical properties is that fracture strength is 2.5cN/dtex, and elongation at break 26% is functional.
Embodiment 2, the waste and old pure terylene textiles that is dyeed by Masterbatch prepare the regenerated terylene section
(area is approximately 4cm with the above-mentioned pure terylene cloth waste sheet of clean dry
2) send into feed bin with the speed of 300Kg/h, pure terylene cloth waste sheet is sent in the device of degassing fusion through forced feed mechanism; Wherein, this forced feed mechanism comprises drawing-in device and agitating device, and the rotating speed of control drawing-in device is 90r/min, and the rotating speed of agitating device is 25r/min; Degassing fusion step comprises dry degassing step and fusion step, and wherein, the temperature of dry degassing step is 200 ℃, and the rotating speed that is used for the screw rod of dry degassing step is 120r/min; The fusion step comprises melt zone, and temperature is 265 ℃, and vacuum exhaust section, temperature are 265 ℃, changeover portion, and temperature is 270 ℃ and mixing metering section, temperature is 275 ℃; The vacuum of fusion step remains 200Pa; The melt that degassing fusion is obtained is the fondant filter of 45 μ m through the aperture, gets into polycondensation reaction device then: the horizontal reacting still, and the control temperature is 295 ℃, and mixing speed is 3 rev/mins, and vacuum is 10Pa; After in-line viscometer detected, be up-to-standard, the product that polycondensation reaction is obtained was through fondant filter, and its aperture is 40 μ m, got into end of extruded band then and carried out granulation and promptly get regenerated terylene and cut into slices.
Through test, inherent viscosity is 0.65dL/g, 253 ℃ of fusing points, and ash content 0.05%, iron divides 6mg/Kg, satisfies the specification requirement of GB/T14189-2008 " fiber polyester chip ".
Embodiment 3, the waste and old pure terylene textiles that is mixed by shades of colour prepare the regenerated terylene section
(area is approximately 5cm with the above-mentioned pure terylene cloth waste sheet of clean dry
2) send into feed bin with the speed of 300Kg/h, pure terylene cloth waste sheet is sent in the device of degassing fusion through forced feed mechanism; Wherein, this forced feed mechanism comprises drawing-in device and agitating device, and the rotating speed of control drawing-in device is 80r/min, and the rotating speed of agitating device is 20r/min; Degassing fusion step comprises dry degassing step and fusion step, and wherein, the temperature of dry degassing step is 180 ℃, and the rotating speed that is used for the screw rod of dry degassing step is 100r/min; The fusion step comprises melt zone, and temperature is 265 ℃, and vacuum exhaust section, temperature are 265 ℃, changeover portion, and temperature is 270 ℃ and mixing metering section, temperature is 275 ℃; The vacuum of fusion step remains 250Pa; The melt that degassing fusion is obtained is the fondant filter of 45 μ m through the aperture, gets into polycondensation reaction device then: the horizontal reacting still, and the control temperature is 295 ℃, and mixing speed is 2.5 rev/mins, and vacuum is 20Pa; After in-line viscometer detected, be up-to-standard, the product that polycondensation reaction is obtained was through fondant filter, and its aperture is 40 μ m, got into end of extruded band then and carried out granulation and promptly get regenerated terylene and cut into slices.
Through test, inherent viscosity is 0.67dL/g, 250 ℃ of fusing points, and ash content 0.04%, iron divides 7mg/Kg, satisfies the specification requirement of GB/T14189-2008 " fiber polyester chip ".
Claims (10)
1. one kind is utilized waste and old pure terylene textiles to prepare the method that regenerated terylene is cut into slices; The main component of said waste and old pure terylene textiles is a PETG, comprises the steps: the fusion that outgases of said waste and old pure terylene textiles is obtained the terylene melt; Said terylene melt carries out polycondensation reaction after granulation promptly gets said regenerated terylene section.
2. method according to claim 1 is characterized in that: said degassing fusion steps in sequence comprises dry degassing step and fusion step; The vacuum of said fusion step is 200Pa-300Pa.
3. method according to claim 1 and 2 is characterized in that: the temperature of said dry degassing step is 160 ℃-200 ℃, and the rotating speed of the screw rod in the said dry degassing step is 100r/min-120r/min; Said fusion steps in sequence comprises melt zone, vacuum exhaust section, changeover portion and mixing metering section; The temperature of said melt zone is 265 ℃, and the temperature of said vacuum exhaust section is 265 ℃, and the temperature of said changeover portion is 270 ℃, and the temperature of said mixing metering section is 275 ℃.
4. according to arbitrary described method among the claim 1-3, it is characterized in that: said waste and old pure terylene textiles is sent in the device of said degassing fusion through forced feed mechanism.
5. method according to claim 4 is characterized in that: said forced feed mechanism comprises drawing-in device and agitating device; The rotating speed of said drawing-in device is 70r/min-90r/min; The rotating speed of said agitating device is 15r/min-25r/min.
6. according to arbitrary described method among the claim 1-5, it is characterized in that: said method also comprises the step of said terylene melt through the melt filtration device; The aperture of said melt filtration device is 40 μ m-50 μ m.
7. according to arbitrary described method among the claim 1-6, it is characterized in that: said method also comprises the step of the product process secondary melt filtration device that said polycondensation reaction is obtained; The aperture of said secondary melt filtration device is 35 μ m-40 μ m.
8. according to arbitrary described method among the claim 1-7, it is characterized in that: said polycondensation reaction is carried out in the horizontal reacting still; The rotating speed 2.5r/min-3r/min of the agitator of said horizontal reacting still.
9. according to arbitrary described method among the claim 1-8, it is characterized in that: the temperature of said polycondensation reaction is 295 ℃, and vacuum is 10Pa-20Pa.
10. according to arbitrary described method among the claim 1-9, it is characterized in that: said granulation is carried out in end of extruded band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101774913A CN102392310A (en) | 2011-06-28 | 2011-06-28 | Method for preparing regenerated polyester chips by utilizing waste pure polyester textiles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101774913A CN102392310A (en) | 2011-06-28 | 2011-06-28 | Method for preparing regenerated polyester chips by utilizing waste pure polyester textiles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102392310A true CN102392310A (en) | 2012-03-28 |
Family
ID=45859683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101774913A Pending CN102392310A (en) | 2011-06-28 | 2011-06-28 | Method for preparing regenerated polyester chips by utilizing waste pure polyester textiles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102392310A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102731760A (en) * | 2012-07-17 | 2012-10-17 | 龙福环能科技股份有限公司 | Method for carrying out alcoholysis and then polymerization on recycled polyester bottle chip melts |
| CN102746498A (en) * | 2012-07-17 | 2012-10-24 | 龙福环能科技股份有限公司 | Method for increasing melt viscosities of recycled polyester bottle flakes |
| CN103614785A (en) * | 2013-10-31 | 2014-03-05 | 安徽东锦化纤科技有限公司 | Technology for preparing recycled polyester |
| CN110576530A (en) * | 2018-06-08 | 2019-12-17 | 泉州市坤盛节能科技有限公司 | preparation process of regenerated polyester granules with clothing waste fibers as main raw materials |
| CN112831862A (en) * | 2021-01-28 | 2021-05-25 | 浙江逸含化纤有限公司 | Tackifying spinning process for regenerating waste polyester |
| EP3835347A1 (en) * | 2019-12-13 | 2021-06-16 | Tai Su Energy Technology Co., Ltd. | A device to increase intrinsic viscosity of recycling polyester waste |
| EP3835346A1 (en) * | 2019-12-13 | 2021-06-16 | Tai Su Energy Technology Co., Ltd. | A method to increase intrinsic viscosity of recycling polyester waste |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1608267A1 (en) * | 1988-12-06 | 1990-11-23 | Всесоюзный научно-исследовательский институт нетканых текстильных материалов | Method of producing nonwoven material |
| CN1440867A (en) * | 1996-07-24 | 2003-09-10 | 东芝机械株式会社 | Operation monitoring system for high smelting resin dewatering formation |
| US20040219247A1 (en) * | 1999-09-22 | 2004-11-04 | Helmut Bacher | Process and apparatus for recycling of PET-material |
| CN101508169A (en) * | 2008-02-04 | 2009-08-19 | 浙江欧亚薄膜材料有限公司 | PET waste membrane recovery and treatment method |
| CN101659757A (en) * | 2009-09-28 | 2010-03-03 | 华东理工大学 | Method for preparing medium-viscosity PET slice by recycled low-viscosity polyester yarn |
| JP2010126660A (en) * | 2008-11-28 | 2010-06-10 | Toray Ind Inc | Method for producing reclaimed polyester |
| CN101845681A (en) * | 2010-04-08 | 2010-09-29 | 普宁市秋盛化纤有限公司 | Method for producing high-intensity fine denier fiber from scrap material and returned material of polyester bottles |
| CN101856874A (en) * | 2010-06-03 | 2010-10-13 | 浙江富源再生资源有限公司 | Method for producing fiber grade polyester chip with waste pure polyester garments |
-
2011
- 2011-06-28 CN CN2011101774913A patent/CN102392310A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1608267A1 (en) * | 1988-12-06 | 1990-11-23 | Всесоюзный научно-исследовательский институт нетканых текстильных материалов | Method of producing nonwoven material |
| CN1440867A (en) * | 1996-07-24 | 2003-09-10 | 东芝机械株式会社 | Operation monitoring system for high smelting resin dewatering formation |
| US20040219247A1 (en) * | 1999-09-22 | 2004-11-04 | Helmut Bacher | Process and apparatus for recycling of PET-material |
| CN101508169A (en) * | 2008-02-04 | 2009-08-19 | 浙江欧亚薄膜材料有限公司 | PET waste membrane recovery and treatment method |
| JP2010126660A (en) * | 2008-11-28 | 2010-06-10 | Toray Ind Inc | Method for producing reclaimed polyester |
| CN101659757A (en) * | 2009-09-28 | 2010-03-03 | 华东理工大学 | Method for preparing medium-viscosity PET slice by recycled low-viscosity polyester yarn |
| CN101845681A (en) * | 2010-04-08 | 2010-09-29 | 普宁市秋盛化纤有限公司 | Method for producing high-intensity fine denier fiber from scrap material and returned material of polyester bottles |
| CN101856874A (en) * | 2010-06-03 | 2010-10-13 | 浙江富源再生资源有限公司 | Method for producing fiber grade polyester chip with waste pure polyester garments |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102731760A (en) * | 2012-07-17 | 2012-10-17 | 龙福环能科技股份有限公司 | Method for carrying out alcoholysis and then polymerization on recycled polyester bottle chip melts |
| CN102746498A (en) * | 2012-07-17 | 2012-10-24 | 龙福环能科技股份有限公司 | Method for increasing melt viscosities of recycled polyester bottle flakes |
| CN102746498B (en) * | 2012-07-17 | 2014-03-26 | 龙福环能科技股份有限公司 | Method for increasing melt viscosities of recycled polyester bottle flakes |
| CN103614785A (en) * | 2013-10-31 | 2014-03-05 | 安徽东锦化纤科技有限公司 | Technology for preparing recycled polyester |
| CN110576530A (en) * | 2018-06-08 | 2019-12-17 | 泉州市坤盛节能科技有限公司 | preparation process of regenerated polyester granules with clothing waste fibers as main raw materials |
| EP3835347A1 (en) * | 2019-12-13 | 2021-06-16 | Tai Su Energy Technology Co., Ltd. | A device to increase intrinsic viscosity of recycling polyester waste |
| EP3835346A1 (en) * | 2019-12-13 | 2021-06-16 | Tai Su Energy Technology Co., Ltd. | A method to increase intrinsic viscosity of recycling polyester waste |
| CN112831862A (en) * | 2021-01-28 | 2021-05-25 | 浙江逸含化纤有限公司 | Tackifying spinning process for regenerating waste polyester |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102392310A (en) | Method for preparing regenerated polyester chips by utilizing waste pure polyester textiles | |
| CN102899729B (en) | The method of Waste Polyester textile processing Regenerated Polyester Staple Fiber dimension | |
| CN102586933B (en) | Method for preparing polyester staple fibers by using waste polyester raw material | |
| CN103305960B (en) | Method for manufacturing polyester staple fibers through recycled polyester bottles | |
| CN100480442C (en) | Production method for spinning polyester preoriented yarn by reusing polyester bottle chip | |
| CN101659757A (en) | Method for preparing medium-viscosity PET slice by recycled low-viscosity polyester yarn | |
| CN111088545B (en) | Preparation method of cationic dye dyeable regenerated cotton-like polyester fiber | |
| CN102268744B (en) | Device and method for preparing polyester melt from waste pure polyester textiles | |
| CN108251901A (en) | A kind of method for adding waste and old non-woven cloth reworked material and preparing fiber | |
| US10858512B1 (en) | Biodegradable textile yarn and textile made from recycled materials | |
| CN104911748A (en) | Method for industrial production of polyester filament yarn by using polyester waste yarn | |
| CN110093018A (en) | It is a kind of to utilize the polyester alloy and preparation method thereof for recycling blended textile fabric preparation | |
| CN104178841B (en) | Method for manufacturing safety nets by waste polyester bottles | |
| CN104264287B (en) | Method for preparing rope net ribbon-like filaments by drawing waste and old polyethylene terephthalate (PET) bottle sheets | |
| CN104894657A (en) | Large-scale polyester staple fiber production method utilizing PET bottle flakes | |
| BR112020014349A2 (en) | PROCESS TO REUSE A MIXED TEXTILE THAT PRESENTS CELLULOSE AND SYNTHETIC PLASTIC MATERIAL | |
| CN103755933B (en) | A kind of waste PET fabric half degraded thickening prepares the method for long filament grade pet chip | |
| CN109849221B (en) | Method for preparing polyester irregular particles by using polyester waste | |
| CN111334887A (en) | Polyester waste cloth regenerated fiber spinning process with efficient flow and improved quality | |
| CN208701271U (en) | Useless PET polyester circular regeneration product line | |
| CN206956218U (en) | The spinning system of the waste and old non-woven cloth reworked material fiber of high additive | |
| CN108084424A (en) | High intrinsic viscosity PET solid state polymerization techniques | |
| KR102508241B1 (en) | Manufacturing method of monofilament yarn using recycled PET | |
| KR20120068373A (en) | Process for preparing recycled polyester chip and process for preparing recycled polyester filament with modified cross-section | |
| CN110129959A (en) | The preparation method of energy saving and environment friendly regeneration terylene fabric |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120328 |