CN103146020A - High-melting-point renewable polyester for core layers of sheath-core polyester staple fibers and preparation method and application thereof - Google Patents
High-melting-point renewable polyester for core layers of sheath-core polyester staple fibers and preparation method and application thereof Download PDFInfo
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- CN103146020A CN103146020A CN2013100918076A CN201310091807A CN103146020A CN 103146020 A CN103146020 A CN 103146020A CN 2013100918076 A CN2013100918076 A CN 2013100918076A CN 201310091807 A CN201310091807 A CN 201310091807A CN 103146020 A CN103146020 A CN 103146020A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4326—Condensation or reaction polymers
- D04H1/435—Polyesters
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/143—Feedstock the feedstock being recycled material, e.g. plastics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
The invention relates to high-melting-point renewable polyester for core layers of sheath-core polyester staple fibers and a preparation method and application thereof. The high-melting-point renewable polyester is prepared from recycled polyester raw materials, which mainly are polyester bottle pieces, through the following processes: recycling raw materials, washing, proportioning, drying by a rotary drum, carrying out multistage filtering and tackifying a liquid phase, wherein the drying temperature of the rotary drum is 100-150 DEG C, and the drying time is 7-10 hours. The high-melting-point renewable polyester produced by the method can be applied to the preparation of sheath-core polyester staple fibers, so that the added value of polyester wastes in preparation of renewable polyester staple fibers is increased, and the prepared sheath-core renewable polyester staple fibers have the characteristics of stable quality and excellent quality. The method can be applied to the production of industries, such as non-woven fabrics, flocking and composite materials.
Description
Technical field
The present invention relates to belong to the chemical fibre production technical field, relate in particular to core-skin type polyester staple fiber sandwich layer high-melting-point recycled polyester and its preparation method and application.
Background technology
Low melting point core-skin type complex polyester staple fibre refers to be distributed in low-melting point polyester and these two kinds of different polymkeric substance of normal polyester the fiber of making among same fiber with skin-core structure.Cortex is low-melting point polyester, and it has kept the part of properties of normal polyester, has the characteristics of good consistency with normal polyester.The low melting point core-skin composite fiber is mainly used in heat-bondable fibre, and Main Function is low-melting fiber cortex polymer fusing at a certain temperature in non-woven production, coheres effect thereby play in fibrous reticulum.Intensity is high, bulkiness good, elastic restoration ratio is high because low-melting point polyester staple fiber has, and the non-woven of producing has soft, elasticity high is widely used in the fields such as the sanitary materials such as surgical mask, bandage and house decorative material at present.
Production method for low-melting point polyester staple fiber has more research report at present.As patent of invention " a kind of copolyester with low melting point and preparation method thereof " (application number: the method for design that 200810063395.4) discloses copolyester with low melting point, melting point polyester can be down to 110 ℃, and this copolyester with low melting point crystal property is good, limiting viscosity is high, particle is difficult for adhesion, have good spinning property etc.Patent of invention " a kind of production method of low-melting point polyester staple fiber " (application number: 200410072878.2) adopt 120 ℃～130 ℃ low melting point polyester chips through after low-temperature vacuum drying, can get the low melting point staple fibre through melt-spinning.(application number: 200810123792.6) disclosed is water-soluble polyester component and the polytrimethylene terephthalate component low melting point short fiber that is composited side by side to patent of invention " the low melting point short fiber that a kind of parallel type is compound ", and this fiber has good percent thermal shrinkage stability.Research about low melting point core-sheath trevira also has some reports.As patent of invention " a kind of production method of sheath-core type low-melting point polyester staple fiber " (application number: 200810163542.5) it is characterized in that cortex is the low-melting point polyester melt that obtains by fused mass directly spinning, the conventional PET polyester fondant of sandwich layer for obtaining by conventional PET section spinning process.But utilizing reworked material to prepare polyester staple fiber does not report so far as the sandwich layer of core-sheath compound fibre.
Along with polyester material developing rapidly and using in each field, the quantity discharged of polyester waste material grows with each passing day, its refractory organics has now caused great pollution to environment, and due to the present shortage of industrial raw material, and the recycling of polyester waste material has been become the required of sustainable development society.Most of for low additional fields such as weighting materials with the staple fibre of polyester waste material preparation at present.Study modified accent adhering process, solve that the polyester waste material source is wide, complicated component, technical barrier that quality fluctuation is large, utilize the polyester waste material preparation to have the key subjects that high value-added product becomes upgrading transition of regeneration industry.In addition, this technology substitutes the spinning of eutectic polyester slice with fused mass directly spinning, a series of the asking questions such as preferably resolve that the low-melting point polyester drying cost is large, poor stability, fiber spinnability are poor, and production cost declines to a great extent.
Summary of the invention
Utilize reworked material to prepare the technical problem that polyester sheath core type conjugated fibre exists in order to solve, first purpose of the present invention is to provide a kind of preparation method of core-skin type polyester staple fiber sandwich layer high-melting-point recycled polyester, this high-melting-point recycled polyester can be used for preparing the core-skin type polyester staple fiber, improved the added value that polyester waste material prepares regenerative polyester staple fiber, the core-skin type regenerative polyester staple fiber of preparation has steady quality, colory characteristics.Second purpose of the present invention is to provide the high-melting-point recycled polyester that adopts above-mentioned method preparation.The 3rd purpose of the present invention is to provide the application of the high-melting-point recycled polyester that adopts above-mentioned method preparation.
In order to realize first above-mentioned purpose, the present invention has adopted following technical scheme:
A kind of preparation method of core-skin type polyester staple fiber sandwich layer high-melting-point recycled polyester, the high-melting-point recycled polyester prepares by following technique take polyester bottle slice as main recovery polyester raw material: regenerative raw materials-cleaning-proportioning-drum dried-cascade filtration-liquid-phase tackifying, wherein, the drum dried temperature is 100 ~ 150 ℃, and be 7 ~ 10h time of drying; The step of liquid-phase tackifying is as follows:
1) temperature after the screw rod melting is 0.5dl/g ~ 0.70dl/g 260 ℃ ~ 290 ℃ limiting viscosities melt is pumped to the vacuum separation tower through melt Conveying, melt is 10pa ~ 400pa in vacuum tightness, temperature is 270 ℃ ~ 300 ℃, stops under condition that limiting viscosity can reach 0.55dl/g ~ 0.78dl/g after 15min ~ 40min;
2) melt enters the sticking device of the modified accent of secondary afterwards, melt temperature in the sticking device of the modified accent of secondary is identical with the vacuum separation tower with vacuum tightness, melt constantly advances under the effect of rotatable propeller, melt viscosity constantly increases, angle of rake speed of rotation is 1.5r/min ~ 10r/min, residence time 15min ~ 30min, final melt characteristic viscosity is at 0.60dl/g ~ 1.0dl/g.
Liquid-phase tackifying process using Chinese invention patent of the present invention (application number: 201010574044.7, the applying date: 2010-12-01) the modified accent of described a kind of plastic waste glues system.
As further improvement, the fusing point of high-melting-point recycled polyester is 250～270 ℃, content of carboxyl end group≤20mmol/kg.
As further improvement, the final melt characteristic viscosity of high-melting-point recycled polyester is at 0.60dl/g ~ 0.88dl/g.
As further improvement, cascade filtration adopts secondary filter, and the filtering net precision of secondary filter is 120 orders～150 orders, and the filtration area of strainer is 10 ~ 20 ㎡.
As further improvement, described recovery polyester raw material also comprises the useless polyester-containing textiles that mixes.
In order to realize second above-mentioned purpose, the present invention also provides above-mentioned preparation method to prepare the high-melting-point recycled polyester.
In order to realize second above-mentioned purpose, the present invention also provides a kind of core-skin type polyester staple fiber, and the sandwich layer of this core-skin type polyester staple fiber adopts above-mentioned high-melting-point recycled polyester.
High-melting-point recycled polyester of the present invention can be used for preparing the core-skin type polyester staple fiber, has improved the added value that polyester waste material prepares regenerative polyester staple fiber, and the core-skin type regenerative polyester staple fiber of preparation has steady quality, colory characteristics.Can be used for producing in the industries such as non-woven, flocking, matrix material.
Embodiment
The present invention will be described in detail below in conjunction with specific embodiment: production method of the present invention specifically comprises:
Embodiment 1
1, the preparation of low-melting point polyester: terephthalic acid (PTA) is 2:1 with the feed ratio of m-phthalic acid (IPA), ethylene glycol (EG) is 8:1 with the feed ratio of neopentyl glycol (NPG), terephthalic acid (PTA) is 1.2:1 with the feed ratio of ethylene glycol (EG), the molar ratio of alkyd is 1.5, the catalytic antimony trioxide (Sb203) and Cobaltous diacetate (Co (Ac) 2) are the 300ppm of sour total amount in reaction system, then to add weight be the stablizer trimethyl phosphite 99 (TMP) of 0.01% (relatively sour composition).Above raw material esterification adds to depress at nitrogen carries out, and temperature is 180～250 ℃, and pressure is 0.05MPa～0.4MPa, reaction times 1.5～3h; The polycondensation temperature is 250～285 ℃, and vacuum tightness is 30～200Pa, and reaction times 2.5～5h, the fusing point of the low-melting point polyester that obtains are 110 ℃, and content of carboxyl end group is 25mmol/kg, and limiting viscosity is 0.69dL/g.
2, the preparation of recycled polyester: adopt bottle chips through the technical process of cleaning, drum dried, cascade filtration, liquid-phase tackifying.Wherein, the drum dried temperature is 130 ℃, and be 8h time of drying.The step of liquid-phase tackifying is as follows: 1) temperature after the screw rod melting is 0.55dl/g 270 ℃ of limiting viscosities melt is pumped to the vacuum separation tower through melt Conveying, melt is 100pa in vacuum tightness, temperature is 280 ℃, stop 30min under condition after limiting viscosity can reach 0.68dl/g; 2) melt enters horizontal type device afterwards, melt temperature in horizontal retort is identical with the vacuum separation tower with vacuum tightness, melt constantly advances under the effect of rotatable propeller, melt viscosity constantly increases, angle of rake speed of rotation is 5r/min, residence time 20min, final melt characteristic viscosity is at 0.79dl/g.The fusing point of recycled polyester is 264 ℃, and content of carboxyl end group is 16 mmol/kg, and limiting viscosity is 0.79dl/g.
3, core-skin type regenerative polyester staple fiber: above-mentioned low-melting point polyester melt and recycled polyester melt are entered composite spinneret pack with the accurate measurement of 4:6 core-skin weight respectively, the melt that sprays from the spinning jet of composite component, through cooling, coiling, boundling, drawing-off, typing, cut-out and packing, can get the core-skin type regenerative polyester staple fiber.The drying temperature of recycled polyester raw material is 150 ℃, and be 7h time of drying, 280 ℃ of extruder temperatures; Low-melting point polyester spinning pipeline holding temperature is 230 ℃, and recycled polyester spinning pipeline holding temperature is 275 ℃, and spinning body temperature is 280 ℃; Ring quenching wind-warm syndrome is 15 ℃, and wind speed is 2.0m/s; Spinning speed is 1100m/min; Ratio of drawing is 2.0, and 65 ℃ of drawing temperatures, drawing speed are 110m/min.The core-skin type regenerative polyester staple fiber quality index that obtains through above-mentioned production technique is:
Linear density: 4.24dtex
Breaking tenacity: 3.12cN/dtex
Elongation at break: 40%
Cutting length: 51.5mm.
Embodiment 2
1, the preparation of low-melting point polyester: terephthalic acid (PTA), m-phthalic acid (IPA), the feed ratio of hexanodioic acid (AA) is 8:1:1, ethylene glycol (EG) is 6:1 with the feed ratio of hexylene glycol (HG), terephthalic acid (PTA) is 1:1.3 with the feed ratio of ethylene glycol (EG), the molar ratio of alkyd is 1.4, the catalytic antimony trioxide (Sb203) is the 400ppm of sour total amount in reaction system with Cobaltous diacetate (Co (Ac) 2), adding weight is the stablizer trimethyl phosphite 99 (TMP) of 0.01% (relatively sour composition) again.Above raw material esterification adds to depress at nitrogen carries out, and temperature is 220 ℃, and pressure is 0.3MPa, reaction times 2.5h; The polycondensation temperature is 275 ℃, and vacuum tightness is 80Pa, and reaction times 3h, the fusing point of the low-melting point polyester that obtains are 105 ℃, and content of carboxyl end group is 28mmol/kg, and limiting viscosity is 0.67dL/g.
2, the preparation of recycled polyester: adopt bottle chips through the technical process of cleaning, drum dried, cascade filtration, liquid-phase tackifying.Wherein, the drum dried temperature is 110 ℃, and be 7h time of drying.The step of liquid-phase tackifying is as follows: 1) temperature after the screw rod melting is 0.55dl/g 270 ℃ of limiting viscosities melt is pumped to the vacuum separation tower through melt Conveying, melt is 100pa in vacuum tightness, temperature is 280 ℃, stop 30min under condition after limiting viscosity can reach 0.68dl/g; 2) melt enters horizontal type device afterwards, melt temperature in horizontal retort is identical with the vacuum separation tower with vacuum tightness, melt constantly advances under the effect of rotatable propeller, melt viscosity constantly increases, angle of rake speed of rotation is 5r/min, residence time 15min, final melt characteristic viscosity is at 0.78dl/g.The fusing point of recycled polyester is 269 ℃, and content of carboxyl end group is 14 mmol/kg, and limiting viscosity is 0.78dl/g.
3, core-skin type regenerative polyester staple fiber: above-mentioned low-melting point polyester melt and recycled polyester melt are entered composite spinneret pack with the accurate measurement of 5:5 core-skin weight respectively, the melt that sprays from the spinning jet of composite component, through cooling, coiling, boundling, drawing-off, typing, cut-out and packing, can get the core-skin type regenerative polyester staple fiber.The drying temperature of recycled polyester raw material is 140 ℃, and be 7.5h time of drying, 270 ℃ of extruder temperatures; Low-melting point polyester spinning pipeline holding temperature is 220 ℃, and recycled polyester spinning pipeline holding temperature is 275 ℃, and spinning body temperature is 280 ℃; Ring quenching wind-warm syndrome is 20 ℃, and wind speed is 3.0m/s; Spinning speed is 1000m/min; Ratio of drawing is 3.0, and 56 ℃ of drawing temperatures, drawing speed are 120m/min.The core-skin type regenerative polyester staple fiber quality index that obtains through above-mentioned production technique is:
Linear density: 4.05 dtex
Breaking tenacity: 2.93cN/dtex
Elongation at break: 46%
Cutting length: 51.6mm.
Embodiment 3
1, the preparation of low-melting point polyester: the feed ratio of terephthalic acid (PTA), hexanodioic acid (AA) is 3:1, ethylene glycol (EG) is 10:1 with the feed ratio of neopentyl glycol (NPG), terephthalic acid (PTA) is 1:1.3 with the feed ratio of ethylene glycol (EG), the molar ratio of alkyd is 1.5, the catalytic antimony trioxide (Sb203) and Cobaltous diacetate (Co (Ac) 2) are the 300ppm of sour total amount in reaction system, then to add weight be the stablizer trimethyl phosphite 99 (TMP) of 0.01% (relatively sour composition).Above raw material esterification adds to depress at nitrogen carries out, and temperature is 210 ℃, and pressure is 0.25MPa, reaction times 2h; The polycondensation temperature is 280 ℃, and vacuum tightness is 60Pa, and reaction times 3h, the fusing point of the low-melting point polyester that obtains are 115 ℃, and content of carboxyl end group is 30mmol/kg, and limiting viscosity is 0.68dL/g.
2, the preparation of recycled polyester: adopt bottle chips through the technical process of cleaning, drum dried, cascade filtration, liquid-phase tackifying.Wherein, the drum dried temperature is 100 ℃, and be 7h time of drying.The step of liquid-phase tackifying is as follows: 1) temperature after the screw rod melting is 0.55dl/g 270 ℃ of limiting viscosities melt is pumped to the vacuum separation tower through melt Conveying, melt is 100pa in vacuum tightness, temperature is 280 ℃, stop 30min under condition after limiting viscosity can reach 0.68dl/g; 2) melt enters horizontal type device afterwards, melt temperature in horizontal retort is identical with the vacuum separation tower with vacuum tightness, melt constantly advances under the effect of rotatable propeller, melt viscosity constantly increases, angle of rake speed of rotation is 5r/min, residence time 15min, final melt characteristic viscosity is at 0.78dl/g.The fusing point of recycled polyester is 267 ℃, and content of carboxyl end group is 16 mmol/kg, and limiting viscosity is 0.78dl/g.
3, core-skin type regenerative polyester staple fiber: above-mentioned low-melting point polyester melt and recycled polyester melt are entered composite spinneret pack with the accurate measurement of 6:4 core-skin weight respectively, the melt that sprays from the spinning jet of composite component, through cooling, coiling, boundling, drawing-off, typing, cut-out and packing, can get the core-skin type regenerative polyester staple fiber.The drying temperature of recycled polyester raw material is 140 ℃, and be 7h time of drying, 170 ℃ of extruder temperatures; Low-melting point polyester spinning pipeline holding temperature is 230 ℃, and recycled polyester spinning pipeline holding temperature is 270 ℃, and spinning body temperature is 285 ℃; Ring quenching wind-warm syndrome is 22 ℃, and wind speed is 2.5m/s; Spinning speed is 900m/min; Ratio of drawing is 2.5,60 ° of C of drawing temperature, and drawing speed is 110m/min.The core-skin type regenerative polyester staple fiber quality index that obtains through above-mentioned production technique is:
Linear density: 4.12dtex
Breaking tenacity: 2.55cN/dtex
Elongation at break: 48%
Cutting length: 51.8mm.
Claims (7)
1. the preparation method of core-skin type polyester staple fiber sandwich layer high-melting-point recycled polyester, it is characterized in that: the high-melting-point recycled polyester prepares by following technique take polyester bottle slice as main recovery polyester raw material: regenerative raw materials-cleaning-proportioning-drum dried-cascade filtration-liquid-phase tackifying, wherein, the drum dried temperature is 100 ~ 150 ℃, and be 7 ~ 10h time of drying; The step of liquid-phase tackifying is as follows:
1) temperature after the screw rod melting is 0.5dl/g ~ 0.70dl/g 260 ℃ ~ 290 ℃ limiting viscosities melt is pumped to the vacuum separation tower through melt Conveying, melt is 10pa ~ 400pa in vacuum tightness, temperature is 270 ℃ ~ 300 ℃, stops under condition that limiting viscosity can reach 0.55dl/g ~ 0.78dl/g after 15min ~ 40min;
2) melt enters the sticking device of the modified accent of secondary afterwards, melt temperature in the sticking device of the modified accent of secondary is identical with the vacuum separation tower with vacuum tightness, melt constantly advances under the effect of rotatable propeller, melt viscosity constantly increases, angle of rake speed of rotation is 1.5r/min ~ 10r/min, residence time 15min ~ 30min, final melt characteristic viscosity is at 0.60dl/g ~ 1.0dl/g.
2. the preparation method of core-skin type polyester staple fiber sandwich layer high-melting-point recycled polyester according to claim 1, it is characterized in that: the fusing point of high-melting-point recycled polyester is 250～270 ℃, content of carboxyl end group≤20mmol/kg.
3. the preparation method of core-skin type polyester staple fiber sandwich layer high-melting-point recycled polyester according to claim 1, it is characterized in that: the final melt characteristic viscosity of high-melting-point recycled polyester is at 0.60dl/g ~ 0.88dl/g.
4. the preparation method of core-skin type polyester staple fiber sandwich layer high-melting-point recycled polyester according to claim 1, it is characterized in that: cascade filtration adopts secondary filter, the filtering net precision of secondary filter is 120 orders～150 orders, and the filtration area of strainer is 10 ~ 20 ㎡.
5. the preparation method of core-skin type polyester staple fiber sandwich layer high-melting-point recycled polyester according to claim 1, is characterized in that: reclaim polyester raw material and also comprise the useless polyester-containing textiles that mixes.
6. according to claim 1 ~ 5 described preparation methods of any one claim prepare the high-melting-point recycled polyester.
7. a core-skin type polyester staple fiber, is characterized in that: the sandwich layer employing high-melting-point recycled polyester claimed in claim 6 of this core-skin type polyester staple fiber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100918076A CN103146020A (en) | 2013-03-21 | 2013-03-21 | High-melting-point renewable polyester for core layers of sheath-core polyester staple fibers and preparation method and application thereof |
| PCT/CN2014/073751 WO2014146588A1 (en) | 2013-03-21 | 2014-03-20 | Method for preparing high-melting-point recycled polyester used for sheath-core polyester staple fiber layer, and application thereof |
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| CN2013100918076A CN103146020A (en) | 2013-03-21 | 2013-03-21 | High-melting-point renewable polyester for core layers of sheath-core polyester staple fibers and preparation method and application thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014146588A1 (en) * | 2013-03-21 | 2014-09-25 | 宁波大发化纤有限公司 | Method for preparing high-melting-point recycled polyester used for sheath-core polyester staple fiber layer, and application thereof |
| WO2014146590A1 (en) * | 2013-03-21 | 2014-09-25 | 宁波大发化纤有限公司 | Sheath-core polyester staple fiber employing recycled polyester as core layer and method for manufacturing the fiber |
| CN106400140A (en) * | 2016-11-14 | 2017-02-15 | 浙江理工大学 | Processing technology of low-melting-point sheath-core composite filament |
| CN109853081A (en) * | 2018-12-23 | 2019-06-07 | 无锡金通高纤股份有限公司 | A kind of low melting point composite monofilament and preparation method thereof |
| CN110117837A (en) * | 2019-04-26 | 2019-08-13 | 绍兴喜能纺织科技有限公司 | It is a kind of without turning round core/sheath bicomponent elastic filament and preparation method thereof |
| CN110616474A (en) * | 2019-10-22 | 2019-12-27 | 宁波大发化纤有限公司 | Method for preparing skin-core composite low-melting-point regenerated polyester fiber from waste polyester textile |
| CN111138641A (en) * | 2018-11-02 | 2020-05-12 | 中国石油化工股份有限公司 | Method for preparing bottle-grade slices by recycling waste polyester bottles |
| CN114000207A (en) * | 2021-10-14 | 2022-02-01 | 余姚大发化纤有限公司 | Intelligent production method, equipment, control device and readable carrier medium for colored regenerated low-melting-point fibers |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445972A (en) * | 2008-12-29 | 2009-06-03 | 浙江理工大学 | Method for producing sheath-core type low-melting point polyester staple fiber |
| CN102899729A (en) * | 2012-10-19 | 2013-01-30 | 宁波大发化纤有限公司 | Method for processing regenerated polyester staple fiber by using waste polyester textile |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000328369A (en) * | 1999-05-21 | 2000-11-28 | Nippon Ester Co Ltd | Polyester multifilament containing regenerated polyester |
| CN102093590B (en) * | 2010-12-01 | 2012-05-30 | 宁波大发化纤有限公司 | Waste plastic conditioning and viscosity modifying system |
| CN103147162B (en) * | 2013-03-21 | 2015-09-16 | 宁波大发化纤有限公司 | Sandwich layer adopts core-skin type polyester staple fiber of recycled polyester and preparation method thereof |
| CN103146020A (en) * | 2013-03-21 | 2013-06-12 | 宁波大发化纤有限公司 | High-melting-point renewable polyester for core layers of sheath-core polyester staple fibers and preparation method and application thereof |
-
2013
- 2013-03-21 CN CN2013100918076A patent/CN103146020A/en active Pending
-
2014
- 2014-03-20 WO PCT/CN2014/073751 patent/WO2014146588A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445972A (en) * | 2008-12-29 | 2009-06-03 | 浙江理工大学 | Method for producing sheath-core type low-melting point polyester staple fiber |
| CN102899729A (en) * | 2012-10-19 | 2013-01-30 | 宁波大发化纤有限公司 | Method for processing regenerated polyester staple fiber by using waste polyester textile |
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| WO2014146588A1 (en) * | 2013-03-21 | 2014-09-25 | 宁波大发化纤有限公司 | Method for preparing high-melting-point recycled polyester used for sheath-core polyester staple fiber layer, and application thereof |
| WO2014146590A1 (en) * | 2013-03-21 | 2014-09-25 | 宁波大发化纤有限公司 | Sheath-core polyester staple fiber employing recycled polyester as core layer and method for manufacturing the fiber |
| CN106400140A (en) * | 2016-11-14 | 2017-02-15 | 浙江理工大学 | Processing technology of low-melting-point sheath-core composite filament |
| CN106400140B (en) * | 2016-11-14 | 2019-04-16 | 浙江理工大学 | A kind of processing technology of low melting point core-sheath long filament |
| CN111138641A (en) * | 2018-11-02 | 2020-05-12 | 中国石油化工股份有限公司 | Method for preparing bottle-grade slices by recycling waste polyester bottles |
| CN111138641B (en) * | 2018-11-02 | 2021-12-21 | 中国石油化工股份有限公司 | Method for preparing bottle-grade slices by recycling waste polyester bottles |
| CN109853081A (en) * | 2018-12-23 | 2019-06-07 | 无锡金通高纤股份有限公司 | A kind of low melting point composite monofilament and preparation method thereof |
| CN110117837A (en) * | 2019-04-26 | 2019-08-13 | 绍兴喜能纺织科技有限公司 | It is a kind of without turning round core/sheath bicomponent elastic filament and preparation method thereof |
| CN110117837B (en) * | 2019-04-26 | 2022-01-11 | 绍兴喜能纺织科技有限公司 | Torsion-free sheath-core type bi-component stretch yarn and preparation method thereof |
| CN110616474A (en) * | 2019-10-22 | 2019-12-27 | 宁波大发化纤有限公司 | Method for preparing skin-core composite low-melting-point regenerated polyester fiber from waste polyester textile |
| CN110616474B (en) * | 2019-10-22 | 2021-02-12 | 宁波大发化纤有限公司 | Method for preparing skin-core composite low-melting-point regenerated polyester fiber from waste polyester textile |
| CN114000207A (en) * | 2021-10-14 | 2022-02-01 | 余姚大发化纤有限公司 | Intelligent production method, equipment, control device and readable carrier medium for colored regenerated low-melting-point fibers |
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| WO2014146588A1 (en) | 2014-09-25 |
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