CN104195673A - Direct spinning method and system of bi-component polyester composite fiber - Google Patents
Direct spinning method and system of bi-component polyester composite fiber Download PDFInfo
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- CN104195673A CN104195673A CN201410479196.7A CN201410479196A CN104195673A CN 104195673 A CN104195673 A CN 104195673A CN 201410479196 A CN201410479196 A CN 201410479196A CN 104195673 A CN104195673 A CN 104195673A
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Abstract
The invention provides a direct spinning method of bi-component polyester composite fiber. The direct spinning method comprises the following steps: introducing 5-25wt% esterifying liquid into a pipeline from esterification to pre-polycondensation on a conventional polyester production line, mixing with modified slurry, and performing polycondensation reaction to obtain modified melt; performing pre-polycondensation reaction and polycondensation reaction on the remaining esterifying liquid to obtain conventional melt; enabling the conventional melt and the modified melt to enter a composite spinning assembly respectively as a core layer and a skin layer of the bicomponent polyester composite fiber. The invention further discloses a direct spinning system of the bicomponent polyester composite fiber. The direct spinning system can be obtained by restructuring the existing polyester direct spinning production line, namely a three-way valve and a metering pump are added on the pipeline from the esterification to the pre-condensation. The esterifying liquid introduced in the direct spinning method is 5%-25% of the esterifying liquid introduced on the polyester production line, so that production of the conventional directly-spun single-component polyester fiber is not affected and the amount of a transition material is reduced during replacement of products; most of public projects and a polyester control system in a polyester factory can be fully used, so that the production cost is used.
Description
Technical field
The present invention relates to a kind of bi-component polyester composite fibre direct fabrics method and system, belong to macromolecule chemical industry and chemical fiber field.
Background technology
Polyester fondant Direct Spinning staple fibre is the model of the synthetic fiber production industry advanced technology application nineties in last century, compares with polyester slice melt spinning in the past, in the uniformity of investment, operating cost and the fiber quality of process units, has outstanding advantage.
Along with the exploitation in textile application market and the development of Nonwovens In Technology, polyester bicomponent composite fibre more and more obtains the concern of industry, and the fiber of having developed and formed the polyester bicomponent of in batches industrialization comprises the composite short fiber arranged side by side of different viscosities, the low melting point core-sheath staple fibre for non-weaving cloth, Water Soluble Island superfine composite staple fibre but traditional polyester bicomponent staple fiber, the high hydrophilic staple fibre of bi-component etc.
But " Transition Materials " that when current above-mentioned polyester chemical modification melt for example, is produced at large production equipment extensive (100～450 ton per days), kind is switched is many, causes production cost high, has had a strong impact on the bi-component composite short fiber competitiveness of product in market.For this reason, there is patented invention (CN101445972) to adopt continuous polyester production process to produce low-melting point polyester, it is cortex that composite fibre adopts Direct Spinning low-melting point polyester, and sandwich layer adopts normal polyester section by screw spinning, obtains the relatively low low melting point core-skin composite fiber of cost.
For the enterprise that possesses the conventional process units of Direct Spinning, the cost of said method is still higher, still has the not good problem of uniform in quality, and the production cost that kind switching produces is higher.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of bi-component polyester composite fibre direct fabrics method reducing costs is provided.
The technical solution used in the present invention is: bi-component polyester composite fibre direct fabrics method, in the esterification of normal polyester production line to the esterifying liquid of drawing 5%～25% volume on the pipeline between precondensation, with modified slurry, after mixing, carry out polycondensation reaction and obtain modification melt; All the other esterifying liquids obtain conventional solution through prepolymerization reaction, polycondensation reaction, and conventional melt and modification melt enter respectively composite spinneret pack, as sandwich layer and the cortex of bi-component polyester composite fibre.
As the preferred technical scheme of the present invention, described modified slurry is ethylene glycol (EG), sorbierite (Sorbitol), polyethylene glycol (PEG), neopentyl glycol (NPG), butanediol (BDO) and smart M-phthalic acid (PIA), SA (Sebacic Acid), M-phthalic acid binaryglycol ester-5-sodium sulfonate (SIPE), adipic acid (AA) difference or jointly forms.
The present invention also provides a kind of bi-component polyester composite fibre direct fabrics system that can be used for above-mentioned bi-component polyester composite fibre direct fabrics method, comprises conventional solution system, modification solution system and composite spinning casing;
Wherein conventional solution system comprises hollander tub, the first delivery pump, esterifying kettle, esterifying liquid delivery pump, the first triple valve, prepolymerization kettle, polycondensation vessel and the melt discharging pump connecting successively, and melt discharging pump is connected with composite spinning casing;
Modification solution system comprises modified poly ester hollander tub, modification melt Conveying pump, uniform mixer, the second delivery pump, modification melt esterifying kettle, the 3rd delivery pump, modified condensation polymer reactor, the modification melt discharging pump connecting successively, modification melt discharging pump is connected with composite spinning casing, also comprise the 4th delivery pump, the 4th delivery pump one end is connected with the first triple valve, and the other end is connected to uniform mixer.
As the preferred technical scheme of the present invention, also comprise the second triple valve and Direct Spinning melt pipe, described second triple valve one end is connected with melt discharging pump, and the other end is connected with composite spinning casing, and the 3rd end is connected with Direct Spinning melt pipe.The setting of this threeway makes native system can be used for the production of normal polyester Direct Spinning homofil.
As the preferred technical scheme of the present invention, described prepolymerization kettle is up flow type prepolymerization kettle, and described modification melt esterifying kettle is horizontal Multicarity continous mode esterifying kettle.
Bi-component polyester composite fibre direct fabrics system of the present invention can utilize the direct spinning production line of existing large capacity polyester to transform, in esterification to increasing triple valve on precondensation pipeline and measuring pump forms, the esterifying liquid that the inventive method is drawn is 5%～25% of normal polyester production line, when not affecting the production of normal polyester Direct Spinning homofil and changing product, the amount of Transition Materials does not reduce greatly, most of public work of polyester factory can be optimized utilization, the control system of polyester also can make full use of, and can greatly reduce production costs.
Accompanying drawing explanation
Fig. 1 is the structural representation of bi-component polyester composite fibre direct fabrics system of the present invention.
Below by embodiment, the invention will be further described by reference to the accompanying drawings.
The specific embodiment
embodiment 1 bi-component polyester composite fibre direct fabrics system
This bi-component polyester composite fibre direct fabrics system comprises conventional solution system, modification solution system and composite spinning casing;
Wherein conventional solution system comprises hollander tub 1, the first delivery pump 2, esterifying kettle 3, esterifying liquid delivery pump 4, the first triple valve 5, up flow type prepolymerization kettle 6, polycondensation vessel 7 and the melt discharging pump 17 connecting successively, and melt discharging pump 17 is connected with composite spinning box 18 bodies;
Modification solution system comprises modified poly ester hollander tub 9, modification melt Conveying pump 10, uniform mixer 11, the second delivery pump 12, horizontal Multicarity continous mode esterifying kettle 13, the 3rd delivery pump 14, modified condensation polymer reactor 15, the modification melt discharging pump 16 connecting successively, modification melt discharging pump 16 is connected with composite spinning casing 18, also comprise the 4th delivery pump 8, the 4th delivery pump 8 one end are connected with the first triple valve 5, and the other end is connected to uniform mixer 11;
Also comprise the second triple valve 19 and Direct Spinning melt pipe 20, described second triple valve 19 one end are connected with melt discharging pump 17, and the other end is connected with composite spinning casing 18, and the 3rd end is connected with Direct Spinning melt pipe 20.The setting of this threeway makes native system can be used for the production of normal polyester Direct Spinning homofil.
embodiment 2 bi-component polyester composite fibre direct fabrics methods are produced the full Direct Spinning core-sheath of hot sticky type low melting point polyester staple fiber for non-weaving cloth
The cortex of low melting point core-skin composite fiber is low melting point LM-PET(low melting point polyethylene terephthalate), fusing point is 110～120 ℃, and sandwich layer is common PET, and fusing point is 255～260 ℃, and core-sheath volume ratio is 20:80.
Normal polyester PET is synthetic: PTA(p-phthalic acid) and EG according to preset proportion, enter hollander tub 1 and carry out slurry preparation, by delivery pump 2, slurry is delivered to esterifying kettle 3 and carries out esterification, esterifying liquid after esterification enters up flow type prepolymerization kettle 6 by esterifying liquid delivery pump 4 by newly-increased triple valve 5 and carries out precondensation, precondensation liquid enters from the bottom of polycondensation vessel 7, under vacuum condition, carry out the synthetic PET melt of polycondensation, by melt discharging pump 17, supply composite spinning casing 18, as the sandwich layer of composite short fiber.One pack system PET enters Direct Spinning melt pipe 20 by triple valve 19 and carries out one pack system PET staple fibre direct fabrics.
Low-melting point polyester PET's is synthetic: PIA and EG enter modified poly ester hollander tub 9 according to preset proportion and carry out slurry preparation, by modification melt Conveying pump 10, enter uniform mixer 11, the esterifying liquid that is taken from the 5%wt of conventional production line enters uniform mixer 11 together by delivery pump 8, the slurry of conventional esterifying liquid and PIA-EG is evenly mixed, by delivery pump 12, enter horizontal Multicarity continous mode esterifying kettle 13 and carry out esterification, by delivery pump 14, polycondensation material is delivered to modified condensation polymer reactor 15 and carries out polycondensation reaction, the low melting point LM-PET obtaining enters composite spinning casing 18 by discharging pump 16, cortex melt as low melting point core-sheath polyester staple fiber.PIA content in modification melt is about 45～55%wt.
embodiment 3 bi-component polyester composite fibre direct fabrics methods are produced superfine islands-in-sea bicomponent used for artificial leather and are entirely directly spun Water Soluble Island superfine composite staple fibre
" sea " component of island composite short fiber adopts low melting point copolymerization PET(Co-PET), it can dissolve in 98 ℃ of hot water, and island component adopts conventional PET, and Co-PET component accounts for 15～30% of total component.
Conventional PET is with embodiment 2.
Water-soluble polyester Co-PET's is synthetic: SIPE and EG enter modified poly ester hollander tub 9 according to preset proportion and carry out modification liquid allotment, by modification melt Conveying pump 10, enter uniform mixer 11, the esterifying liquid that is taken from the 25%wt of conventional production line enters uniform mixer 11 together by delivery pump 8, the slurry of conventional esterifying liquid and SIPE-EG is evenly mixed, by delivery pump 12, enter horizontal Multicarity continous mode esterifying kettle 13 and carry out esterification, by delivery pump 14, polycondensation material is delivered to modified condensation polymer reactor 15 and carries out polycondensation reaction, the water-soluble Co-PET obtaining enters composite spinning casing 18 by discharging pump 16, cortex melt as Water Soluble Island superfine composite staple fibre.SIPE content in modification melt is about 15～25%wt.
embodiment 4 bi-component polyester composite fibre direct fabrics methods are produced the full Direct Spinning core-sheath of hot sticky type low melting point polyester staple fiber for non-weaving cloth
Raw material, the step of this embodiment and embodiment 2 are basic identical, and the esterifying liquid that difference is to be taken from conventional production line is 15%wt, and the PIA content in modification melt is about 50～60%wt.
Claims (5)
1. a bi-component polyester composite fibre direct fabrics method,,, carries out polycondensation reaction and obtains modification melt with modified slurry to the esterifying liquid of drawing 5%～25% volume on the pipeline between precondensation in the esterification of normal polyester production line after mixing; All the other esterifying liquids obtain conventional solution through prepolymerization reaction, polycondensation reaction, and conventional melt and modification melt enter respectively composite spinneret pack, as sandwich layer and the cortex of bi-component polyester composite fibre.
2. bi-component polyester composite fibre direct fabrics method according to claim 1, is characterized in that: described modified slurry is ethylene glycol, sorbierite, polyethylene glycol, neopentyl glycol, butanediol, smart M-phthalic acid, SA, M-phthalic acid binaryglycol ester-5-sodium sulfonate, adipic acid difference or jointly forms.
3. for a bi-component polyester composite fibre direct fabrics system for bi-component polyester composite fibre direct fabrics method claimed in claim 1, comprise conventional solution system, modification solution system and composite spinning casing;
Wherein conventional solution system comprises hollander tub, the first delivery pump, esterifying kettle, esterifying liquid delivery pump, the first triple valve, prepolymerization kettle, polycondensation vessel and the melt discharging pump connecting successively, and melt discharging pump is connected with composite spinning casing;
Modification solution system comprises modified poly ester hollander tub, modification melt Conveying pump, uniform mixer, the second delivery pump, modification melt esterifying kettle, the 3rd delivery pump, modified condensation polymer reactor, the modification melt discharging pump connecting successively, modification melt discharging pump is connected with composite spinning casing, also comprise the 4th delivery pump, the 4th delivery pump one end is connected with the first triple valve, and the other end is connected to uniform mixer.
4. bi-component polyester composite fibre direct fabrics system according to claim 3, it is characterized in that: also comprise the second triple valve and Direct Spinning melt pipe, described second triple valve one end is connected with melt discharging pump, the other end is connected with composite spinning casing, and the 3rd end is connected with Direct Spinning melt pipe.
5. bi-component polyester composite fibre direct fabrics system according to claim 3, is characterized in that: described prepolymerization kettle is up flow type prepolymerization kettle, and described modification melt esterifying kettle is horizontal Multicarity continous mode esterifying kettle.
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| CN105063792A (en) * | 2015-07-24 | 2015-11-18 | 江苏江南高纤股份有限公司 | Direct spinning antibacterial and flame-retardant polyester wool type fiber filament bundle, manufacturing method and production system thereof |
| CN106894102A (en) * | 2017-04-12 | 2017-06-27 | 江苏江南高纤股份有限公司 | Efficient polyolefin/polyester sheath core is combined direct spinning system and method |
| CN117661152A (en) * | 2023-12-13 | 2024-03-08 | 江苏港虹纤维有限公司 | A kind of melt direct spinning single-kettle high and low viscosity PET bicomponent elastic fiber and its preparation method |
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| US20040225103A1 (en) * | 2003-04-22 | 2004-11-11 | Klemens Kohlgrueber | Process for mixing polymer melts with additives |
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| CN117661152A (en) * | 2023-12-13 | 2024-03-08 | 江苏港虹纤维有限公司 | A kind of melt direct spinning single-kettle high and low viscosity PET bicomponent elastic fiber and its preparation method |
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