CN103484971A - Method for preparing anion far-infrared short fibers employing waste renewable polyester bottle flakes - Google Patents
Method for preparing anion far-infrared short fibers employing waste renewable polyester bottle flakes Download PDFInfo
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- CN103484971A CN103484971A CN201310371890.2A CN201310371890A CN103484971A CN 103484971 A CN103484971 A CN 103484971A CN 201310371890 A CN201310371890 A CN 201310371890A CN 103484971 A CN103484971 A CN 103484971A
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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
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- 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 discloses a method for preparing anion far-infrared short fibers employing waste renewable polyester bottle flakes. The method comprises the following steps: pretreating and drying the recycled waste renewable polyester bottle flakes; carrying out drying treatment on far-infrared masterbatch and anion masterbatch; feeding the dried polyester bottle flakes, the far-infrared masterbatch and the anion masterbatch to a special metering feeder for mixing, so as to obtain a mixture; carrying out melted extrusion on the mixed mixture by a screw to obtain a melt; filtering the melt, metering and spinning, cooling by cross blowing, winding and oiling, feeding by traction, filling fibers and doffing; carrying out bundling treatment on the fibers inside a barrel, and carrying out the procedures such as drafting, oiling, fiber folding, curling, thermoforming, cutting off and the like by oil bath, so as to obtain the anion far-infrared short fibers. The method disclosed by the invention is reasonable in preparation technology, and strong in maneuverability. The product prepared by the method disclosed by the invention is lower in selling price than the product prepared from native polyester. Therefore, the method has good economic benefits and social benefits.
Description
Technical field
The present invention specifically a kind of discarded regenerative piece of polyester bottle prepares the method for far-infrared negative-ion staple fibre, belongs to resource regeneration field and chemical fibre technology and manufactures field.
Background technology
Raising along with living standards of the people, the textile application field is more and more extensive, society is also more and more higher to the requirement of textiles, so give far infrared and the anion function of textiles, the quality of life that improves people, the added value that promotes textiles is had great significance.
The far-infrared negative-ion staple fibre provided in the market is mainly to adopt Surface-micromachining process to arrange and make the conventional polyester fiber, or add the far-infrared negative-ion master batch and make fiber in primary polyester slice, though the former can temporarily keep the far-infrared negative-ion function, but the time one is long or can lose effect after washing, and latter's far-infrared negative-ion functional effect is better, and function is lasting, but, because manufacturing cost is higher, affected promoting the use of of product.
With the far-infrared negative-ion staple fibre that adopts primary PET to prepare, compare, the far-infrared negative-ion staple fibre that adopts discarded regenerative piece of polyester bottle to prepare, not only production cost is lower, and product also has plurality of advantages such as intensity is high, dimensionally stable, has therefore nowadays caused the concern of many enterprises.For preparing the functional form regenerative polyester staple fiber, more people has been studied work, and these researchs mainly contain:
Chinese patent CN201110425503.X discloses a kind of production technology of far-infrared polyester short fibers, this technique is that to take regenerative PET material and far-infrared matrix be raw material, through pre-treatment, drum dried, melt spinning, cooling forming, coiling, drawing-off, curling, oil, obtain finished fiber after cut-out, HEAT SETTING, wherein in far-infrared matrix, contain the far-infared ceramic powder of 19%-21%, the finished fiber that this invention makes has good warmth retention property and health.
Chinese patent CN201110293750.9 discloses a kind of method of preparing functional ultraviolet-resistant polyester staple fiber from waste renewable polyester bottle chips, the method is that to take regenerative PET material and ultraviolet screening mother granule be raw material, through preliminary treatment, drum dried, melt spinning, the moulding of ring quenching, reel oil, draw, nervous HEAT SETTING, oil, folded silk, curling, relaxation heat setting, cut-out, packing obtain finished fiber.
Chinese patent CN201210079837.0 discloses a kind of imitative goose down regenerated terylene superbhort fiber and production technology thereof, this technique is to take the regenerative PET material as raw material, after raw material pre-treatment, drum dried, melt spinning, cooling forming, coiling, contain successively silk fall bucket, boundling, drawing-off, curling, oil, the operations such as HEAT SETTING and cut-out make finished fiber, this fiber has the outward appearance similar with eider down and feel.
Chinese patent CN 200810123795.X discloses a kind of polyester staple fiber of recovered chip spinning, it is raw material that this fiber adopts the polyester block material, the waste silk that produce in waste and old polyester bottle, sheet material, film and polyester dacron production process, through the preparation of the operations such as cleaning, sorting, drying, spinning, this fiber spinnability is good, color and luster stable, finished product yarn quality standard is high, the low brute force of loss is high, fault is low, curling good, xeothermic contraction stable.
In above-mentioned disclosed patent, though relate to recycled polyester far infrared staple fibre and recycled polyester uvioresistant staple fibre etc., but adopting anion master batch, far-infrared matrix is raw material with regenerative piece of polyester bottle, the recycled polyester far-infrared negative-ion staple fibre that pass through that preliminary treatment, drum dried, melt spinning, cooling forming, coiling oil, traction, curling, HEAT SETTING, cut-out, packing obtains is there are no open report.
Summary of the invention
The purpose of this invention is to provide a kind of method that discarded regenerative piece of polyester bottle prepares the far-infrared negative-ion staple fibre, the method has solved discarded regenerative piece of polyester bottle because of the difficult problem that impurity is many, can't produce high-end fiber product, and this fiber has very excellent Study On The Radioprotective simultaneously.The method preparation technology is reasonable, workable, is easy to industrializing implementation; Alleviate the harm of discarded object to environment simultaneously, solved environmental protection problem, there is good economic benefit and social benefit.
The objective of the invention is to be achieved through the following technical solutions, a kind of discarded regenerative piece of polyester bottle prepares the method for far-infrared negative-ion staple fibre, that to take anion master batch, far-infrared matrix and discarded regenerative piece of polyester bottle be raw material, through preliminary treatment, drum dried, melt spinning, cooling forming, coiling oil, traction, curling, HEAT SETTING, cut-out operation, obtain the far-infrared negative-ion staple fibre; Specifically comprise the following steps:
1) the discarded regenerative piece of polyester bottle reclaimed is carried out to preliminary treatment;
2) far-infrared matrix and anion master batch are carried out to the drying processing;
3) will send into the metering feeding machine with the far-infrared matrix of processing through super-dry with the anion master batch through pretreated discarded regenerative piece of polyester bottle and carry out weight feed and make it to mix mutually, obtain compound;
4) compound is carried out to the screw rod melt extruded and obtain melt, melt after filtration, metering spinning, ring quenching, reeling oils, draws feeding, contain a doff;
5) silk in bucket is carried out to the boundling processing, through oil bath drawing-off and steam drafting, oil, folded silk, curling, HEAT SETTING, cut-out, packing, obtain the far-infrared negative-ion staple fibre.
Described in step 1), the discarded regenerative piece of polyester bottle reclaimed is carried out to preliminary treatment, comprise discarded regenerative piece of polyester bottle is sorted, pulverizes, cleans and drying, drying is that the discarded regenerative polyester bottle sheet stock cleaned up is dropped into to the vacuum drum drying machine, pass into 3～5Kg steam or conduction oil in the rotary drum chuck, rotate rotary drum simultaneously, temperature keeps 130～160 ℃, start vavuum pump vacuumizes simultaneously, vacuum keep is at 0.06～0.1MPa, 8～12 hours drying times, dried discarded regenerative polyester bottle sheet stock moisture is controlled at below 100ppm.
Step 2) described in, far-infrared matrix and anion master batch being carried out to drying processes is that far-infrared matrix and anion master batch are put in seal silo, the seal silo bottom passes into dried hot-air, temperature keeps 120～140 ℃, 10～12 hours drying times, dried far-infrared matrix and anion master batch moisture are controlled at below 60ppm.
The pretreated discarded regenerative polyester bottle sheet stock of process described in step 3) is from metering feeding machine A aperture mistake, the described far-infrared matrix of processing through super-dry and anion master batch are from metering feeding machine B aperture mistake, by adjusting rotating speed, quantitatively control, the percentage by weight that assurance far-infrared matrix and anion master batch account for discarded regenerative piece of polyester bottle, infrared master batch and anion master batch gross weight is 3～8%.
Compound described in step 4) enters the screw rod melt extruded, each district's temperature of screw rod is controlled between 260～310 ℃, the screw rod head pressure is controlled at 10～18 MPa, melt after melting enters fondant filter, the screen pack precision of filter is 120～250 orders, and the filtration gross area of filter is 4.5～12m
2, filter temperature is controlled at 260～290 ℃.
Melt described in step 4) is metered into spinning manifold through measuring pump from filter out, from spinnerets, extrudes precursor, and before spinning manifold, pressure remains on 4～6MPa, and spinning body temperature remains on 260～290 ℃; The temperature of ring blowing is 15～32 ℃, and wind speed is 0.6～2 meter per second; Winding speed is 800～1200 m/mins.
Tow by the gross in step 5) after bucketful, in the cluster area repiece, passes through oil bath drawing-off bath, steam drafting, oils, folds silk, curling, HEAT SETTING, cuts into staple fibre; Oil bath drawing-off bath temperature is 60～80 ℃, and the steam chest temperature is 90～120 ℃, and heat setting temperature is 120～150 ℃, and the time is 15～30 minutes.
The fiber number of described far-infrared negative-ion staple fibre product is 2.6～2.8dtex, fracture strength>=5.1cN/dtex, and elongation at break is 25～36%, length is 38mm, 51mm, 65mm or 76mm, crispation number 10～13 (individual 25mm
-1), oil content 0.13～0.20%, 180 ℃ of dry-hot shrinkage≤6.5%.
Compared with prior art, the present invention has following beneficial effect: the first, and the method has solved discarded regenerative piece of polyester bottle because of the difficult problem that impurity is many, can't produce high-end fiber product, and this fiber has very excellent Study On The Radioprotective simultaneously.The second, the method preparation technology is reasonable, workable, is easy to industrializing implementation; Alleviate the harm of discarded object to environment simultaneously, solved environmental protection problem, there is good economic benefit and social benefit.The 3rd, by above-mentioned technological process and method, adopt discarded regenerative piece of polyester bottle to prepare functional form far-infrared negative-ion staple fibre, its product quality indicator meets or exceeds the index of the former raw material of polyester of the same trade both domestic and external, and therefore can substitute with the former raw material of polyester is the far-infrared negative-ion staple fibre product that main raw material is produced by adding far-infrared matrix and anion master batch.The 4th, the inventive method preparation technology is reasonable, workable; It is comparatively cheap that the inventive method preparing product product standby with primary polyester compared price, thereby have good economic benefit and social benefit.
The accompanying drawing explanation
Fig. 1 is the process chart that the discarded regenerative piece of polyester bottle of the present invention prepares the method for far-infrared negative-ion staple fibre.
The specific embodiment
A kind of discarded regenerative piece of polyester bottle prepares the method for far-infrared negative-ion staple fibre, that to take anion master batch, far-infrared matrix and discarded regenerative piece of polyester bottle be raw material, through preliminary treatment, drum dried, melt spinning, cooling forming, coiling oil, traction, curling, HEAT SETTING, cut-out operation, obtain the far-infrared negative-ion staple fibre; Specifically comprise the following steps:
1) the discarded regenerative piece of polyester bottle reclaimed is carried out to preliminary treatment;
2) far-infrared matrix and anion master batch are carried out to the drying processing;
3) will send into the metering feeding machine with the far-infrared matrix of processing through super-dry with the anion master batch through pretreated discarded regenerative piece of polyester bottle and carry out weight feed and make it to mix mutually, obtain compound;
4) compound is carried out to the screw rod melt extruded and obtain melt, melt after filtration, metering spinning, ring quenching, reeling oils, draws feeding, contain a doff;
5) silk in bucket is carried out to the boundling processing, through oil bath drawing-off and steam drafting, oil, folded silk, curling, HEAT SETTING, cut-out, packing, obtain the far-infrared negative-ion staple fibre.
Described in step 1), the discarded regenerative piece of polyester bottle reclaimed is carried out to preliminary treatment, comprise discarded regenerative piece of polyester bottle is sorted, pulverizes, cleans and drying, drying is that the discarded regenerative polyester bottle sheet stock cleaned up is dropped into to the vacuum drum drying machine, pass into 3～5Kg steam or conduction oil in the rotary drum chuck, rotate rotary drum simultaneously, temperature keeps 130～160 ℃, start vavuum pump vacuumizes simultaneously, vacuum keep is at 0.06～0.1MPa, 8～12 hours drying times, dried discarded regenerative polyester bottle sheet stock moisture is controlled at below 100ppm.
Step 2) described in, far-infrared matrix and anion master batch being carried out to drying processes is that far-infrared matrix and anion master batch are put in seal silo, the seal silo bottom passes into dried hot-air, temperature keeps 120～140 ℃, 10～12 hours drying times, dried far-infrared matrix and anion master batch moisture are controlled at below 60ppm.
The pretreated discarded regenerative polyester bottle sheet stock of process described in step 3) is from metering feeding machine A aperture mistake, the described far-infrared matrix of processing through super-dry and anion master batch are from metering feeding machine B aperture mistake, by adjusting rotating speed, quantitatively control, the percentage by weight that assurance far-infrared matrix and anion master batch account for discarded regenerative piece of polyester bottle, infrared master batch and anion master batch gross weight is 3～8%.
Compound described in step 4) enters the screw rod melt extruded, each district's temperature of screw rod is controlled between 260～310 ℃, the screw rod head pressure is controlled at 10～18 MPa, melt after melting enters fondant filter, the screen pack precision of filter is 120～250 orders, and the filtration gross area of filter is 4.5～12m
2, filter temperature is controlled at 260～290 ℃.
Melt described in step 4) is metered into spinning manifold through measuring pump from filter out, from spinnerets, extrudes precursor, and before spinning manifold, pressure remains on 4～6MPa, and spinning body temperature remains on 260～290 ℃; The temperature of ring blowing is 15～32 ℃, and wind speed is 0.6～2 meter per second; Winding speed is 800～1200 m/mins.
Tow by the gross in step 5) after bucketful, in the cluster area repiece, passes through oil bath drawing-off bath, steam drafting, oils, folds silk, curling, HEAT SETTING, cuts into staple fibre; Oil bath drawing-off bath temperature is 60～80 ℃, and the steam chest temperature is 90～120 ℃, and heat setting temperature is 120～150 ℃, and the time is 15～30 minutes.
The fiber number of described far-infrared negative-ion staple fibre product is 2.6～2.8dtex, fracture strength>=5.1cN/dtex, and elongation at break is 25～36%, length is 38mm, 51mm, 65mm or 76mm, crispation number 10～13 (individual 25mm
-1), oil content 0.13～0.20%, 180 ℃ of dry-hot shrinkage≤6.5%.
embodiment 1
Discarded regenerative piece of polyester bottle is carried out to preliminary treatment and (comprise sorting, pulverize and clean) and dry, again the bottle sheet of having cleaned is dropped into to the vacuum drum drying machine, after throwing honest material, logical 3.5Kg steam or conduction oil in the rotary drum chuck, rotate rotary drum simultaneously, temperature keeps 140 ℃, start vavuum pump vacuumizes simultaneously, vacuum keep is at 0.08MPa, dry 9 hours, dried polyester bottle sheet material moisture is 90, far-infrared matrix and anion master batch are carried out to the drying processing simultaneously, the dry processing is mainly that it is put in seal silo, bin bottom passes into dried hot-air, temperature keeps 125 ℃, 10.5 hours drying times, dried far-infrared matrix and anion master batch moisture are 55ppm.
Then dried discarded regenerative piece of polyester bottle, far-infrared matrix and anion master batch being sent into to the metering feeding machine mixes, wherein dried discarded regenerative piece of polyester bottle is from special measuring feeding machine A aperture mistake, dried far-infrared matrix and anion master batch are from special measuring feeding machine B aperture mistake, by adjusting rotating speed, quantitatively control, the percentage by weight that assurance far-infrared matrix and anion master batch active ingredient account for discarded regenerative piece of polyester bottle, infrared master batch and anion master batch gross weight is 4%.
Afterwards by dried far-infrared matrix and anion master batch bottle sheet compound, by the screw machine extrusion molten, give certain pressure simultaneously, obtain melt, each district's temperature of screw rod is controlled at 280 ℃ of left and right, and the screw rod head pressure is controlled at 17MPa, and the polyester fondant after melting enters fondant filter, the screen pack precision of filter is 200 orders, and the filtration gross area of filter is 10m
2, filter temperature is controlled at 280 ℃.Melt after filtration enters spinning manifold, by the measuring pump weight feed, keeps certain pressure simultaneously, enters assembly, then extrudes precursor from spinnerets, and the precursor of being extruded by spinnerets oils, draws feeding, contains a silk doff through ring quenching, coiling.
Finally the precursor in bucket is carried out to the boundling processing, through oil bath drawing-off and secondary steam drawing-off, oil, folded silk, curling, HEAT SETTING, cut-out, make far-infrared negative-ion staple fibre finished product.
Wherein, when implementing fore-spinning, must strictly control temperature and pressure: the spinning melt temperature remains on 285 ℃; Before spinning manifold, pressure remains on 5MPa, and the temperature of ring blowing is 28 ℃, and wind speed is 1.0 meter per seconds; Winding speed is 1000 m/mins.After enforcement, spin in operation, oil bath drawing-off bath temperature is 70 ℃, and the steam chest temperature is 100 ℃, and heat setting temperature is 140 ℃, and the time is 20 minutes, the staple fibre that shearing length is 38mm.The far-infrared negative-ion staple fibre prepared according to the present embodiment method, after spin the total multiplying power of drawing-off and be controlled at 3.5 times.
embodiment 2
Discarded regenerative piece of polyester bottle is carried out to preliminary treatment and (comprise sorting, pulverize and clean) and dry, again the bottle sheet of having cleaned is dropped into to the vacuum drum drying machine, after throwing honest material, logical 4.5Kg steam or conduction oil in the rotary drum chuck, rotate rotary drum simultaneously, temperature keeps 150 ℃, start vavuum pump vacuumizes simultaneously, vacuum keep is at 0.09MPa, 11 hours drying times, dried polyester bottle sheet material moisture is below 85ppm, far-infrared matrix and anion master batch are carried out to the drying processing simultaneously, the dry processing is mainly that far-infrared matrix and anion master batch are put in seal silo, bin bottom passes into dried hot-air, temperature keeps 135 ℃, 11 hours drying times, dried far-infrared matrix and anion master batch moisture are 50ppm.
Then dried discarded regenerative piece of polyester bottle, far-infrared matrix and anion master batch being sent into to the metering feeding machine mixes, wherein by dried discarded regenerative piece of polyester bottle from special measuring feeding machine A aperture mistake, and dried far-infrared matrix and anion master batch are from special measuring feeding machine B aperture mistake, by adjusting rotating speed, quantitatively control, the percentage by weight that assurance far-infrared matrix and anion master batch active ingredient account for discarded regenerative piece of polyester bottle, infrared master batch and anion master batch gross weight is 6%.
Afterwards by dried far-infrared matrix and anion master batch bottle sheet compound, by the screw machine extrusion molten, give certain pressure simultaneously, obtain melt, each district's temperature of screw rod is controlled at 290 ℃ of left and right, and the screw rod head pressure is controlled at 16MPa, and the polyester fondant after melting enters fondant filter, the screen pack precision of filter is 250 orders, and the filtration gross area of filter is 12m
2, filter temperature is controlled at 290 ℃.Melt after filtration enters spinning manifold, by the measuring pump weight feed, keeps certain pressure simultaneously, enters assembly, then extrudes precursor from spinnerets, and the precursor of being extruded by spinnerets oils, draws feeding, contains a silk doff through ring quenching, coiling.
Finally the precursor in bucket is carried out to the boundling processing, through oil bath drawing-off and secondary steam drawing-off, nervous HEAT SETTING, oil, folded silk, curling, relaxation heat setting, cut-out, make far-infrared negative-ion staple fibre finished product.
Wherein, when implementing fore-spinning, must strictly control temperature and pressure: the spinning melt temperature remains on 290 ℃; Before spinning manifold, pressure remains on 6MPa, and the temperature of ring blowing is 30 ℃, and wind speed is 1.5 meter per seconds; Winding speed is 1100 m/mins.After enforcement, spin in operation, it is 80 ℃ that profit is bathed the drawing-off bath temperature, and the steam chest temperature is 110 ℃, and heat setting temperature is 140 ℃, and the time is 25 minutes, the staple fibre that shearing length is 38mm.The far-infrared negative-ion staple fibre prepared according to the present embodiment method, after spin the total multiplying power of drawing-off and be controlled at 4.0 times.
Claims (8)
1. a discarded regenerative piece of polyester bottle prepares the method for far-infrared negative-ion staple fibre, it is characterized in that: described preparation method is that to take anion master batch, far-infrared matrix and discarded regenerative piece of polyester bottle be raw material, through preliminary treatment, drum dried, melt spinning, cooling forming, coiling oil, traction, curling, HEAT SETTING, cut-out operation, obtain the far-infrared negative-ion staple fibre; Described preparation method comprises the following steps:
1) the discarded regenerative piece of polyester bottle reclaimed is carried out to preliminary treatment;
2) far-infrared matrix and anion master batch are carried out to the drying processing;
3) will send into the metering feeding machine with the far-infrared matrix of processing through super-dry with the anion master batch through pretreated discarded regenerative piece of polyester bottle and carry out weight feed and make it to mix mutually, obtain compound;
4) compound is carried out to the screw rod melt extruded and obtain melt, melt after filtration, metering spinning, ring quenching, reeling oils, draws feeding, contain a doff;
5) silk in bucket is carried out to the boundling processing, through oil bath drawing-off and steam drafting, oil, folded silk, curling, HEAT SETTING, cut-out, packing, obtain the far-infrared negative-ion staple fibre.
2. discarded regenerative piece of polyester bottle according to claim 1 prepares the method for far-infrared negative-ion staple fibre, it is characterized in that: described in step 1), the discarded regenerative piece of polyester bottle reclaimed is carried out to preliminary treatment, comprise discarded regenerative piece of polyester bottle is sorted, pulverize, clean and drying, drying is that the discarded regenerative polyester bottle sheet stock cleaned up is dropped into to the vacuum drum drying machine, pass into 3～5Kg steam or conduction oil in the rotary drum chuck, rotate rotary drum simultaneously, temperature keeps 130～160 ℃, start vavuum pump vacuumizes simultaneously, vacuum keep is at 0.06～0.1MPa, 8～12 hours drying times, dried discarded regenerative polyester bottle sheet stock moisture is controlled at below 100ppm.
3. discarded regenerative piece of polyester bottle according to claim 1 prepares the method for far-infrared negative-ion staple fibre, it is characterized in that: step 2) described in far-infrared matrix and anion master batch are carried out to drying processes is that far-infrared matrix and anion master batch are put in seal silo, the seal silo bottom passes into dried hot-air, temperature keeps 120～140 ℃, 10～12 hours drying times, dried far-infrared matrix and anion master batch moisture are controlled at below 60ppm.
4. discarded regenerative piece of polyester bottle according to claim 1 prepares the method for far-infrared negative-ion staple fibre, it is characterized in that: the pretreated discarded regenerative polyester bottle sheet stock of process described in step 3) is from metering feeding machine A aperture mistake, the described far-infrared matrix of processing through super-dry and anion master batch are from metering feeding machine B aperture mistake, quantitatively control by adjusting rotating speed, guarantee that far-infrared matrix and anion master batch account for the percentage by weight 3～8% of discarded regenerative piece of polyester bottle, infrared master batch and anion master batch gross weight.
5. discarded regenerative piece of polyester bottle according to claim 1 prepares the method for far-infrared negative-ion staple fibre, it is characterized in that: compound described in step 4) enters the screw rod melt extruded, each district's temperature of screw rod is controlled between 260～310 ℃, the screw rod head pressure is controlled at 10～18 MPa, melt after melting enters fondant filter, the screen pack precision of filter is 120～250 orders, and the filtration gross area of filter is 4.5～12m
2, filter temperature is controlled at 260～290 ℃.
6. discarded regenerative piece of polyester bottle according to claim 1 prepares the method for far-infrared negative-ion staple fibre, it is characterized in that: melt described in step 4) is metered into spinning manifold through measuring pump from filter out, extrude precursor from spinnerets, before spinning manifold, pressure remains on 4～6MPa, and spinning body temperature remains on 260～290 ℃; The temperature of ring blowing is 15～32 ℃, and wind speed is 0.6～2 meter per second; Winding speed is 800～1200 m/mins.
7. discarded regenerative piece of polyester bottle according to claim 1 prepares the method for far-infrared negative-ion staple fibre, it is characterized in that: the tow by the gross in step 5) after bucketful is in the cluster area repiece, pass through oil bath drawing-off bath, steam drafting, oil, fold silk, curling, HEAT SETTING, cut into staple fibre; Oil bath drawing-off bath temperature is 60～80 ℃, and the steam chest temperature is 90～120 ℃, and heat setting temperature is 120～150 ℃, and the time is 15～30 minutes.
8. discarded regenerative piece of polyester bottle according to claim 1 prepares the method for far-infrared negative-ion staple fibre, it is characterized in that: the fiber number of described far-infrared negative-ion staple fibre product is 2.6～2.8dtex, fracture strength>=5.1cN/dtex, elongation at break is 25～36%, length is 38mm, 51mm, 65mm or 76mm, crispation number 10～13 (individual 25mm
-1), oil content 0.13～0.20%, 180 ℃ of dry-hot shrinkage≤6.5%.
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2013
- 2013-08-23 CN CN201310371890.2A patent/CN103484971A/en active Pending
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