CN115807271A - Spinneret plate, asymmetric double-hollow crimped polyester and preparation method thereof - Google Patents
Spinneret plate, asymmetric double-hollow crimped polyester and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 229920000728 polyester Polymers 0.000 title claims description 44
- 229920004933 Terylene® Polymers 0.000 claims abstract description 52
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 52
- 239000000835 fiber Substances 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 10
- 238000009987 spinning Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000009835 boiling Methods 0.000 claims description 7
- 238000009998 heat setting Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 abstract description 33
- 238000010008 shearing Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 8
- 230000035699 permeability Effects 0.000 abstract description 7
- 235000017166 Bambusa arundinacea Nutrition 0.000 abstract description 5
- 235000017491 Bambusa tulda Nutrition 0.000 abstract description 5
- 241001330002 Bambuseae Species 0.000 abstract description 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 abstract description 5
- 239000011425 bamboo Substances 0.000 abstract description 5
- 230000002522 swelling effect Effects 0.000 abstract description 5
- 244000025254 Cannabis sativa Species 0.000 description 9
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 9
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 9
- 235000009120 camo Nutrition 0.000 description 9
- 235000005607 chanvre indien Nutrition 0.000 description 9
- 239000011487 hemp Substances 0.000 description 9
- 239000000155 melt Substances 0.000 description 7
- 238000004043 dyeing Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000008961 swelling Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 240000008564 Boehmeria nivea Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000001007 puffing effect Effects 0.000 description 1
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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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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
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Abstract
The invention relates to a spinneret plate, asymmetric double-hollow curled terylene and a preparation method thereof, wherein the spinneret plate comprises a spinneret plate body and a plurality of spinneret holes formed on the spinneret plate body, the spinneret holes are of a structure similar to a shape like a Chinese character '9', the asymmetric double-hollow curled terylene with a bamboo joint shape, namely the linen-like terylene integrating the characteristics of abnormity, hollowness and curling, is prepared by using the spinneret plate and utilizing the difference of an outlet hole swelling effect and a shearing rate, has higher evenness, can generate a curling shape when being heated, can generate a capillary phenomenon, and simultaneously increases the surface area of the terylene, so that the prepared fabric has a fluffy feeling, improves the gloss effect and the hand feeling, improves the air permeability of the fabric, and greatly improves the application range of FDY. In addition, the asymmetric double-hollow curled terylene has a hollow structure, so that a continuous cavity is formed in the terylene, the quality of the terylene is reduced, and the lightweight degree of the fabric is improved.
Description
Technical Field
The invention relates to a spinneret plate, asymmetric double-hollow crimped terylene and a preparation method thereof, belonging to the field of polyester fibers.
Background
Hemp is an important one of natural fibers, is called Chinese grass, is a main production area in China, and has the advantages of excellent air permeability, smooth hand feeling, quick moisture absorption and dispersion and rough and unique fabric style due to uneven evenness of the hemp fibers. However, hemp fibers have a high degree of crystallinity, and thus, they have a high strength but insufficient flexibility, and therefore, they have a hard texture. The terylene has high strength, good elasticity, flexibility and easy drying, the fabric does not need to be ironed, and the price of the terylene short fiber is only one fourth of that of the hemp short fiber. If the terylene and the hemp are blended, the obtained fabric is stiff, smooth, fresh, firm, easy to dry, does not need to be ironed, and is an ideal textile material by combining the length of the two fibers, so the linen-like terylene material is gradually valued.
The linen-like polyester fabric is a fabric obtained by replacing natural fiber linen with chemical fiber polyester. The fabric not only has the surface style of rough backbone of hemp and excellent performance of moisture absorption and air permeability, but also overcomes the defects of rough and hard feeling of the hemp fabric and easy wrinkle of the hemp fabric when the fabric is worn. The slub is one of the main characteristics of the linen-like polyester, and the thermal shrinkage rate and the elongation rate of the slub are higher than those of the slub due to the difference of the structure of the linen-like polyester. During dyeing, the nubs absorb more dye than the details, so that the strand silk presents color change of heavy dyeing and light dyeing alternation. The characteristics of the linen-like polyester enable the linen-like polyester to have excellent development performance in textile processing. The linen-like polyester fabric spun by the linen-like polyester has the characteristics of smoothness, good air permeability, soft color, dry hand feeling, draping and the like of natural fiber fabrics, and the product is popular in the market.
At present, the linen-like polyester method mainly comprises polyester-linen blending, composite deformation processing, uneven stretching and the like, but the uneven degree of fiber evenness obtained by the polyester-linen blending is low, and the technical difficulties of the composite deformation processing, uneven stretching and the like are high, so that the linen-like polyester is difficult to produce on a large scale, and a simpler method is required to be found for preparing the linen-like polyester.
Disclosure of Invention
The invention aims to provide a spinneret plate, asymmetric double-hollow crimped terylene and a preparation method thereof, wherein the asymmetric double-hollow crimped terylene with a bamboo joint shape is prepared by using the spinneret plate with spinneret orifices of a structure similar to a shape like a Chinese character '9', and by utilizing the difference of an outlet hole swelling effect and a shearing rate, the asymmetric double-hollow crimped terylene has high yarn evenness and is simple in preparation method.
In order to achieve the purpose, the invention provides the following technical scheme: the spinneret plate is used for preparing asymmetric double-hollow crimped terylene and comprises a spinneret plate body and a plurality of spinneret holes formed in the spinneret plate body, wherein the spinneret holes are of a structure similar to a shape like a Chinese character '9', each spinneret hole comprises a first arc-shaped long hole, a second arc-shaped long hole and a third arc-shaped long hole which are not connected with each other and are arranged in sequence, the first arc-shaped long hole, the second arc-shaped long hole and the third arc-shaped long hole are of a structure similar to a shape like a Chinese character 'C', the orientation of the first arc-shaped long hole is the same as that of the second arc-shaped long hole, and the orientation of the second arc-shaped long hole is opposite to that of the third arc-shaped long hole.
Furthermore, the central angle of the first arc-shaped long hole is 200-205 degrees, the diameter of the outer ring is 0.50-0.51mm, and the diameter of the inner ring is 0.39-0.40mm; the central angle of the second arc-shaped long hole is 180-190 degrees, the diameter of the outer ring is 0.65-0.66mm, and the diameter of the inner ring is 0.52-0.53mm; the central angle of the third arc-shaped long hole is 120-130 degrees, the diameter of the outer ring is 0.88-0.90mm, the diameter of the inner ring is 0.60-0.62mm, and the outer ring and the inner ring are respectively an outer ring and an inner ring of the corresponding arc-shaped long hole.
Furthermore, the vertical distance between the upper fracture and the lower fracture of the first arc-shaped long hole is 0.04-0.05mm; the vertical distance between the upper fracture and the lower fracture of the second arc-shaped long hole is 0.07-0.08mm; and the vertical distance between the upper fracture and the lower fracture of the third arc-shaped long hole is 0.15-0.16mm, wherein the upper fracture and the lower fracture are respectively the intersection points of the straight line where the fractures are located and the outer ring and the inner ring.
Further, the shortest distance between the first arc-shaped long hole and the second arc-shaped long hole is 0.07-0.08mm; the shortest distance between the second arc-shaped long hole and the third arc-shaped long hole is 0.08-0.09mm.
The invention also provides a preparation method of the asymmetric double-hollow curled terylene, which is characterized in that the spinneret plate is utilized, and the FDY process is adopted, and the asymmetric double-hollow curled terylene is prepared by metering, extruding, cooling, oiling, stretching, heat setting and winding the polyester melt.
Further, the parameters of the FDY process are as follows:
spinning temperature: 280-290 ℃;
cooling temperature: 20-25 ℃;
network pressure: 0.20MPa to 0.30MPa;
a roll speed: 1500m/min-1700m/min;
a roll temperature: 80-85 ℃;
two roll speed: 3700m/min-3800m/min;
two-roll temperature: 105-115 ℃;
speed of winding: 3650m/min-3740m/min.
The invention also provides the asymmetric double-hollow curled terylene prepared by the preparation method of the asymmetric double-hollow curled terylene, the cross section of the asymmetric double-hollow curled terylene is of a 9-like asymmetric double-hollow structure, the yarn evenness value CV of the asymmetric double-hollow curled terylene is 4.5-6.0%, and the yarn evenness value U is 3.0-6.5%.
Furthermore, the titer of the asymmetric double hollow crimped polyester monofilament is 4.5-7.0dtex.
Furthermore, the fineness of the asymmetric double-hollow curled terylene is 80-170dtex, the breaking strength is more than or equal to 3.1cN/dtex, the elongation at break is 45.0 +/-6.0%, the boiling water shrinkage rate is 10.0-15.0%, the oil content is 0.90 +/-0.20%, and the hollowness is 5-10%.
The invention has the beneficial effects that: the spinneret orifice of the spinneret plate is of a structure similar to a shape like a Chinese character '9', the asymmetric double-hollow curled terylene with a bamboo joint shape, namely the linen-like terylene integrating the characteristics of profile, hollowness and curling, is prepared by using the spinneret plate and utilizing the difference of an orifice swelling effect and a shearing rate, has higher uneven yarn evenness, can generate a curling shape when being heated, can generate a capillary phenomenon, and simultaneously increases the surface area of the terylene, so that the prepared fabric has fluffy feeling, improves the gloss effect and the hand feeling, improves the air permeability of the fabric, and greatly improves the application range of FDY. In addition, the asymmetric double-hollow curled terylene has a hollow structure, so that a continuous cavity is formed in the terylene, the quality of the terylene is reduced, and the lightweight degree of the fabric is improved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to make the technical solutions of the present invention practical in accordance with the contents of the specification, the following detailed description is given of preferred embodiments of the present invention with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of the structure of the spinneret orifice of the present invention.
FIG. 2 is a schematic view of a portion of the spinneret orifice of the present invention.
FIG. 3 is another schematic view of the spinneret orifice of the present invention.
FIG. 4 is a schematic cross-sectional structure diagram of the asymmetric double-hollow curled polyester prepared by the invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Furthermore, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, the present invention provides a spinneret plate for preparing asymmetric double hollow crimped polyester fibers, the spinneret plate including a spinneret plate body and a plurality of spinneret holes formed on the spinneret plate body. The specific number and arrangement of the spinneret holes are not specifically limited, and the spinneret holes can be arranged according to actual needs. In addition, the structure of the spinneret plate is the prior art, and the difference lies in the structure of the spinneret orifice, which is not described herein again.
In this embodiment, the spinneret orifice is of a structure similar to a shape like a Chinese character '9', and the spinneret orifice includes a first arc-shaped long hole 1, a second arc-shaped long hole 2 and a third arc-shaped long hole 3 which are not connected with each other and are arranged in sequence. First arc slot hole 1, second arc slot hole 2 and third arc length are "C" font-like structure, and first arc slot hole 1 is the same with the orientation of second arc slot hole 2, and the orientation of second arc slot hole 2 and third arc slot hole 3 is opposite, that is, second arc slot hole 2 and third arc slot hole 3 set up relatively.
The central angle of the first arc-shaped long hole 1 is 200-205 degrees, the diameter of the outer ring is 0.50-0.51mm, and the diameter of the inner ring is 0.39-0.40mm; the central angle of the second arc-shaped long hole 2 is 180-190 degrees, the diameter of the outer ring is 0.65-0.66mm, and the diameter of the inner ring is 0.52-0.53mm; the central angle of the third arc-shaped long hole 3 is 120-130 degrees, the diameter of the outer ring is 0.88-0.90mm, and the diameter of the inner ring is 0.60-0.62mm. Wherein, the outer ring and the inner ring are respectively a ring positioned outside and a ring positioned inside of the corresponding arc-shaped long hole.
Specifically, the first arc-shaped long hole 1 comprises a first outer ring 11, a first inner ring 12 and two first fractures 13 connecting the first outer ring 11 and the first inner ring 12. The two first fractures 13 are oppositely arranged on two sides, the diameter of the first outer ring 11 is 0.50-0.51mm, the diameter of the first inner ring 12 is 0.39-0.40mm, and the size of the first outer ring 11 is larger than that of the first inner ring 12.
The second arc-shaped long hole 2 comprises a second outer ring 21, a second inner ring 22 and two second fractures 23 connecting the second outer ring 21 and the second inner ring 22. The two second interruptions 23 are oppositely arranged on two sides, the diameter of the second outer ring 21 is 0.65-0.66mm, the diameter of the second inner ring 22 is 0.52-0.53mm, and the size of the second outer ring 21 is larger than that of the second inner ring 22.
The third arc-shaped long hole 3 comprises a third outer ring 31, a third inner ring 32 and two third interruptions 33 connecting the third outer ring 31 and the third inner ring 32. The two third interruptions 33 are oppositely arranged on two sides, the diameter of the third outer ring 31 is 0.88-0.90mm, the diameter of the third inner ring 32 is 0.60-0.62mm, and the size of the third outer ring 31 is larger than that of the third inner ring 32.
It is noted that the above numerical values include all values of the lower and upper values that increase by one unit from the lower limit value to the upper limit value, and that there may be an interval of at least two units between any lower value and any higher value.
For example, the central angle of the illustrated first arc-shaped long hole 1 is 200 ° to 205 °, preferably 201 ° to 204 °, more preferably 202 ° to 203 °, for the purpose of illustrating the values such as 201.5 °, 202.5 °, 203.5 ° which are not explicitly listed above.
As described above, the exemplary range of 1 ° as the interval unit cannot exclude the increase of the interval in an appropriate unit such as a numerical unit of 0.5 °, 2 °, and the like. These are only examples of what is intended to be explicitly recited, and all possible combinations of numerical values between the lowest value and the highest value that are explicitly recited in the specification in a similar manner are to be considered.
Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. For other definitions of numerical ranges appearing herein, reference is made to the above description and further description is omitted.
Referring to fig. 2, the vertical distance between the upper fracture and the lower fracture of the first arc-shaped long hole 1 is 0.04-0.05mm; the vertical distance between the upper fracture and the lower fracture of the second arc-shaped long hole 2 is 0.07-0.08mm; the vertical distance between the upper fracture and the lower fracture of the third arc-shaped long hole 3 is 0.15-0.16mm, wherein the upper fracture and the lower fracture are respectively the intersection points of the straight line where the fractures are located and the outer ring and the inner ring. Specifically, the upper fracture and the lower fracture of the first long arc-shaped hole 1 are respectively shown as a and B in fig. 2, the upper fracture and the lower fracture of the second long arc-shaped hole 2 are respectively shown as C and D in fig. 2, and the upper fracture and the lower fracture of the third long arc-shaped hole 3 are respectively shown as E and F in fig. 2.
Referring to fig. 3, the vertical distance between the upper fracture and the lower fracture of the first long arc-shaped hole 1 is shown as a in fig. 3, the vertical distance between the upper fracture and the lower fracture of the second long arc-shaped hole 2 is shown as b in fig. 3, and the vertical distance between the upper fracture and the lower fracture of the third long arc-shaped hole 3 is shown as c in fig. 3.
The shortest distance between the first arc-shaped long hole 1 and the second arc-shaped long hole 2 is 0.07-0.08mm; the shortest distance between the second arc-shaped long hole 2 and the third arc-shaped long hole 3 is 0.08-0.09mm. That is, the first arc-shaped long hole 1, the second arc-shaped long hole 2, and the third arc-shaped long hole 3 are arranged relatively close to each other.
The invention also provides a preparation method of the asymmetric double-hollow curled terylene, which is characterized in that the asymmetric double-hollow curled terylene is prepared by metering, extruding, cooling, oiling, stretching, heat setting and winding the polyester melt by utilizing the spinneret plate and adopting the FDY process.
The FDY process is the prior art and is not described herein again, wherein the parameters of the FDY process are:
spinning temperature: 280-290 ℃;
cooling temperature: 20-25 ℃;
network pressure: 0.20MPa to 0.30MPa;
a roll speed: 1500m/min-1700m/min;
a roll temperature: 80-85 ℃;
two roll speed: 3700m/min-3800m/min;
temperature of the two rolls: 105-115 ℃;
speed of winding: 3650m/min-3740m/min.
The high polymer such as polyester melt has a swelling effect when being sprayed out from a spinneret orifice, namely the high polymer is swelled. The swelling phenomenon of the high polymer is closely related to the diameter or area of the spinneret orifice. Under a certain temperature, a certain shearing rate and the same spinneret orifice length, the extrusion expansion phenomenon of the melt with different intrinsic viscosities has a certain relation with the diameter or the area of the spinneret orifice, and the smaller the diameter or the area of the spinneret orifice is, the more serious the extrusion expansion phenomenon of the melt is, the larger the diameter or the area of the spinneret orifice is, and the expansion phenomenon can be obviously reduced.
The linen-like polyester is prepared by changing the shape and distribution of spinneret orifices of a spinneret plate, the spinneret orifices are made into a plurality of arc-shaped long holes which are close to each other and are discontinuous, and melt trickle is mutually adhered to form profiled fibers by utilizing the bulking effect when the melt is extruded from the spinneret orifices.
The spinneret orifice of this embodiment comprises three discontinuous arc slot holes, including first arc slot hole 1, second arc slot hole 2 and third arc slot hole 3 to first arc slot hole 1, second arc slot hole 2 and third arc slot hole 3 are a set of, are No. 1 viscous flow, no. 2 viscous flows, no. 3 viscous flows respectively. The areas of the three arc-shaped long holes are S1, S2 and S3 respectively, wherein S1 is larger than S2 and smaller than S3. The three arc-shaped long holes have different areas, and the shearing rate of each arc-shaped long hole is different.
Specifically, the shear rate decreases with increasing arcuate slot hole area for the same melt, spinning process conditions, and orifice length. The length of the spinneret orifice is the length of the first arc-shaped long hole 1, the second arc-shaped long hole 2 and the third arc-shaped long hole 3 along the direction vertical to the plane shown in the figure 1.
γ＝(n+3)BQ/(2A 2 )
Wherein gamma is the shear rate, B is the perimeter of the shaped orifice, Q is the volume flow, A is the area of the shaped orifice, and n is the rheology index.
The shear rates of the melt passing through the three arc-shaped long holes are gamma 1, gamma 2 and gamma 3 respectively, and gamma 1 is more than gamma 2 and more than gamma 3. Meanwhile, due to the bulking effect, the three melt viscous flows adhere to each other, and the orifice swelling ratio (the ratio of the balanced cross-sectional area of the extrudate to the cross-sectional area of the die opening) increases with the increase of the shearing rate, so that the orifice swelling ratios of the No. 1 viscous flow, the No. 2 viscous flow and the No. 3 viscous flow are sequentially reduced.
There are two types of viscous, i.e., cohesive, forces: (1) molecular viscous force, which embodies momentum transport effect when molecules move; (2) turbulent viscous forces, which reflect the effect of turbulent motion on momentum transfer. Since the No. 1 viscous flow and the No. 2 viscous flow are both polyester melts, the shear rate and the shear stress of the No. 1 viscous flow in the monomer volume are both greater than the shear rate and the shear stress of the No. 2 viscous flow, and therefore the viscous force and the frictional force between the No. 1 viscous flow and the No. 2 viscous flow in unit volume are both greater than the viscous force and the frictional force of the No. 2 viscous flow. Therefore, the No. 2 viscous flow can attach to the No. 1 viscous flow with a larger shearing rate to perform a flow behavior exceeding the shearing rate of the No. 1 viscous flow, so that the tensile stress borne by the No. 2 viscous flow exceeds the tensile strength of the No. 2 viscous flow, the viscous flow generates a turbulent flow phenomenon, and a small section of the No. 2 viscous flow is attached to the No. 1 viscous flow.
Similarly, the No. 3 viscous flow is attached to the No. 2 viscous flow, and then the viscous flow turbulence phenomenon is generated. The viscous flow turbulence phenomenon results in the thickness change of the melt, and after the melt is stretched and cooled to form fibers, a non-uniform structure similar to hemp fibers can be generated. Meanwhile, another result brought by the viscous flow turbulence phenomenon is that the stress on a fiber shaft is uneven, the stress of a thick fiber part is small, the stress of a thin fiber part is large, when the fiber is heated, the fiber is not uniformly contracted, the fiber is in a curling state, the capillary phenomenon can be generated, the surface area of the fiber is increased, the moisture absorption and water absorption of the fabric are improved, and the application range of the FDY is greatly expanded.
The yarn unevenness U% or CV% value reflects unevenness of the long and short fiber pieces. The evenness of the FDY is reflected to a certain extent, the dyeing property of the final FDY product is obviously influenced, and the fabric can show obvious uneven dyeing, the thick fiber part is deeply dyed, and the thin fiber part is lightly dyed. The fabric surface presents point-like uneven dyeing of the fibrilia fabric. The imitation linen fabric has a surface style of rough and rough texture and the performance of the moisture-absorbing and breathable fabric, and meanwhile, the imitation linen fabric has good shape retention and skirt wrinkle resistance, and the defects of prickling feeling, easiness in wrinkling and the like of the traditional pure linen fabric are overcome.
Referring to fig. 4, the invention also provides an asymmetric double hollow curled polyester prepared by the preparation method of the asymmetric double hollow curled polyester. The asymmetric double-hollow curled terylene with the bamboo joint shape, namely the linen-like terylene integrating the characteristics of profile, hollowness and curling, is prepared by using a special spinneret plate and utilizing the difference of the hole puffing effect and the shearing rate. The yarn evenness value is high, and specifically, the yarn evenness value CV is 4.5-6.0%, and the yarn evenness value U is 3.0-6.5%. The yarn unevenness CV value is 0.7-1.1% and the yarn unevenness U value is 0.8-1.5% as compared with conventional FDY. The asymmetric double-hollow curled polyester obtained by the invention has the style of linen-like fabric.
The fineness of the asymmetric double-hollow curled polyester monofilament is 4.5-7.0dtex, and the performance is excellent. The fineness of the asymmetric double-hollow curled terylene is 80-170dtex, the breaking strength is more than or equal to 3.1cN/dtex, the elongation at break is 45.0 +/-6.0%, the boiling water shrinkage is 10.0-15.0%, the oil content is 0.90 +/-0.20%, and the hollowness is 5-10%.
When the asymmetric double-hollow curled terylene is heated, the curled shape can be generated, the capillary phenomenon can be generated, and meanwhile, the surface area of the terylene is increased, so that the prepared fabric has fluffy feeling, the gloss effect and the hand feeling are improved, the air permeability of the fabric is improved, and the application range of FDY is greatly expanded. The cross section of the fabric is of a 9-like asymmetric double-hollow structure, so that a continuous cavity is formed in the terylene, the quality of the terylene is reduced, and the lightweight degree of the fabric is improved.
The above-mentioned preparation process is described in detail below with specific examples.
Example one
The central angle of a first arc-shaped long hole of a spinneret orifice of the spinneret plate is 200 degrees, the diameter of the outer ring is 0.50mm, and the diameter of the inner ring is 0.39mm; the central angle of the second arc-shaped long hole is 180 degrees, the diameter of the outer ring is 0.65mm, and the diameter of the inner ring is 0.52mm; the central angle of the third arc-shaped long hole is 120 degrees, the diameter of the outer ring is 0.88mm, and the diameter of the inner ring is 0.60mm. The vertical distance between the upper fracture and the lower fracture of the first arc-shaped long hole is 0.04mm; the vertical distance between the upper fracture and the lower fracture of the second arc-shaped long hole is 0.07mm; the vertical distance between the upper fracture and the lower fracture of the third arc-shaped long hole is 0.15mm. The shortest distance between the first arc-shaped long hole and the second arc-shaped long hole is 0.07mm; the shortest distance between the second arc-shaped long hole and the third arc-shaped long hole is 0.08mm.
The spinneret plate is used, and an FDY process is adopted to meter, extrude, cool, oil, stretch, heat-set and wind the polyester melt to prepare the asymmetric double-hollow curled terylene.
The parameters of the FDY process are as follows:
spinning temperature: 280 ℃;
cooling temperature: 20 ℃;
network pressure: 0.20MPa;
a roll speed: 1500m/min;
first roll temperature: 80 ℃;
two roll speed: 3700m/min;
two-roll temperature: 105 ℃;
speed of winding: 3650m/min.
The asymmetric double-hollow crimped terylene obtained by the steps has the yarn evenness CV value of 6.0 percent, the yarn evenness U value of 6.5 percent, the single fiber fineness of 5.5dtex, the terylene fineness of 150dtex, the breaking strength of 3.3cN/dtex, the elongation at break of 51 percent, the boiling water shrinkage of 15 percent, the oil content of 0.90 percent and the hollowness of 8 percent.
Example two
The central angle of a first arc-shaped long hole of a spinneret orifice of the spinneret plate is 205 degrees, the diameter of the outer ring is 0.51mm, and the diameter of the inner ring is 0.40mm; the central angle of the second arc-shaped long hole is 190 degrees, the diameter of the outer ring is 0.66mm, and the diameter of the inner ring is 0.53mm; the central angle of the third arc-shaped long hole is 130 degrees, the diameter of the outer ring is 0.90mm, and the diameter of the inner ring is 0.62mm. The vertical distance between the upper fracture and the lower fracture of the first arc-shaped long hole is 0.05mm; the vertical distance between the upper fracture and the lower fracture of the second arc-shaped long hole is 0.08mm; the vertical distance between the upper fracture and the lower fracture of the third arc-shaped long hole is 0.16mm. The shortest distance between the first arc-shaped long hole and the second arc-shaped long hole is 0.08mm; the shortest distance between the second arc-shaped long hole and the third arc-shaped long hole is 0.08mm.
The asymmetric double-hollow crimped terylene is prepared by using the spinneret plate and adopting an FDY process to meter, extrude, cool, oil, stretch, thermally set and wind a polyester melt.
The parameters of the FDY process are as follows:
spinning temperature: 290 ℃;
cooling temperature: 25 ℃;
network pressure: 0.30MPa;
a roll speed: 1700m/min;
first roll temperature: 85 ℃;
two roll speed: 3800m/min;
two-roll temperature: 115 ℃ is carried out;
speed of winding: 3740m/min.
The asymmetric double-hollow crimped terylene obtained by the steps has the yarn evenness CV value of 5.0 percent, the yarn evenness U value of 4.5 percent, the single fiber fineness of 4.5dtex, the terylene fineness of 80dtex, the breaking strength of 3.4cN/dtex, the elongation at break of 48 percent, the boiling water shrinkage of 13 percent, the oil content of 1.10 percent and the hollowness of 5 percent.
EXAMPLE III
The central angle of a first arc-shaped long hole of a spinneret orifice of the spinneret plate is 203 degrees, the diameter of the outer ring is 0.51mm, and the diameter of the inner ring is 0.40mm; the central angle of the second arc-shaped long hole is 185 degrees, the diameter of the outer ring is 0.66mm, and the diameter of the inner ring is 0.52mm; the central angle of the third arc-shaped long hole is 125 degrees, the diameter of the outer ring is 0.89mm, and the diameter of the inner ring is 0.62mm. The vertical distance between the upper fracture and the lower fracture of the first arc-shaped long hole is 0.05mm; the vertical distance between the upper fracture and the lower fracture of the second arc-shaped long hole is 0.07mm; the vertical distance between the upper fracture and the lower fracture of the third arc-shaped long hole is 0.15mm. The shortest distance between the first arc-shaped long hole and the second arc-shaped long hole is 0.07mm; the shortest distance between the second arc-shaped long hole and the third arc-shaped long hole is 0.09mm.
The asymmetric double-hollow crimped terylene is prepared by using the spinneret plate and adopting an FDY process to meter, extrude, cool, oil, stretch, thermally set and wind a polyester melt.
The parameters of the FDY process are as follows:
spinning temperature: 285 ℃;
cooling temperature: 23 ℃;
network pressure: 0.25MPa;
a roll speed: 1650m/min;
first roll temperature: at 84 ℃;
two roll speed: 3800m/min;
temperature of the two rolls: 115 ℃ of carbon dioxide;
speed of winding: 3700m/min.
The asymmetric double-hollow crimped polyester obtained by the steps has the yarn evenness CV value of 6.0 percent, the yarn evenness U value of 6.5 percent, the single fiber fineness of 7.0dtex, the polyester fineness of 170dtex, the breaking strength of 3.3cN/dtex, the elongation at break of 39 percent, the boiling water shrinkage of 10 percent, the oil content of 0.80 percent and the hollowness of 7 percent.
Example four
The central angle of a first arc-shaped long hole of a spinneret orifice of the spinneret plate is 205 degrees, the diameter of the outer ring is 0.51mm, and the diameter of the inner ring is 0.39mm; the central angle of the second arc-shaped long hole is 185 degrees, the diameter of the outer ring is 0.65mm, and the diameter of the inner ring is 0.52mm; the central angle of the third arc-shaped long hole is 120 degrees, the diameter of the outer ring is 0.89mm, and the diameter of the inner ring is 0.62mm. The vertical distance between the upper fracture and the lower fracture of the first arc-shaped long hole is 0.04mm; the vertical distance between the upper fracture and the lower fracture of the second arc-shaped long hole is 0.08mm; the vertical distance between the upper fracture and the lower fracture of the third arc-shaped long hole is 0.15mm. The shortest distance between the first arc-shaped long hole and the second arc-shaped long hole is 0.08mm; the shortest distance between the second arc-shaped long hole and the third arc-shaped long hole is 0.09mm.
The asymmetric double-hollow crimped terylene is prepared by using the spinneret plate and adopting an FDY process to meter, extrude, cool, oil, stretch, thermally set and wind a polyester melt.
The parameters of the FDY process are as follows:
spinning temperature: 288 ℃;
cooling temperature: 25 ℃;
network pressure: 0.30MPa;
a roll speed: 1700m/min;
a roll temperature: 85 ℃;
two roll speed: 3800m/min;
two-roll temperature: 115 ℃ is carried out;
speed of winding: 3730m/min.
The asymmetric double hollow crimp polyester obtained by the above steps has a yarn evenness value CV of 5.8%, a yarn evenness value U of 6.0%, a single filament fineness of 6.0dtex, a polyester fineness of 160dtex, a breaking strength of 3.5cN/dtex, an elongation at break of 41%, a boiling water shrinkage of 13%, an oil content of 0.80% and a hollowness of 6%.
In conclusion, the spinneret orifice of the spinneret plate is of a structure similar to a shape like a Chinese character '9', the asymmetric double-hollow curled terylene with the bamboo joint shape, namely the linen-like terylene integrating the characteristics of special shape, hollow and curling, is prepared by using the spinneret plate and utilizing the difference between the orifice swelling effect and the shearing rate, has higher unevenness of evenness, can generate the curling shape when being heated, can generate the capillary phenomenon, and simultaneously increases the surface area of the fiber, so that the prepared fabric has fluffy feeling, improves the gloss effect and the hand feeling, improves the air permeability of the fabric, and greatly improves the application range of FDY. In addition, the asymmetric double-hollow crimped terylene has a hollow structure, so that a continuous cavity is formed in the fiber, the quality of the fiber is reduced, and the lightweight degree of the fabric is improved.
All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above examples only show several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (9)
1. The spinneret plate is characterized by comprising a spinneret plate body and a plurality of spinneret holes formed in the spinneret plate body, wherein the spinneret holes are of a structure similar to a shape like a Chinese character '9', the spinneret holes comprise a first arc-shaped long hole, a second arc-shaped long hole and a third arc-shaped long hole which are not connected with each other and are sequentially arranged, the first arc-shaped long hole, the second arc-shaped long hole and the third arc-shaped long hole are of a structure similar to a shape like a Chinese character 'C', the first arc-shaped long hole and the second arc-shaped long hole are in the same direction, and the second arc-shaped long hole and the third arc-shaped long hole are in the opposite direction.
2. The spinneret plate according to claim 1 wherein the central angle of said first arcuate slot is 200 ° to 205 °, the diameter of the outer ring is 0.50 to 0.51mm, and the diameter of the inner ring is 0.39 to 0.40mm; the central angle of the second arc-shaped long hole is 180-190 degrees, the diameter of the outer ring is 0.65-0.66mm, and the diameter of the inner ring is 0.52-0.53mm; the central angle of the third arc-shaped long hole is 120-130 degrees, the diameter of the outer ring is 0.88-0.90mm, the diameter of the inner ring is 0.60-0.62mm, and the outer ring and the inner ring are respectively an outer ring and an inner ring of the corresponding arc-shaped long hole.
3. The spinneret plate according to claim 2, wherein the vertical spacing between the upper and lower interruptions of said first elongated arcuate slot is in the range of 0.04 to 0.05mm; the vertical distance between the upper fracture and the lower fracture of the second arc-shaped long hole is 0.07-0.08mm; and the vertical distance between an upper fracture and a lower fracture of the third arc-shaped long hole is 0.15-0.16mm, wherein the upper fracture and the lower fracture are respectively the intersection points of a straight line where the fractures are located and the outer ring and the inner ring.
4. The spinneret plate according to claim 1 wherein the shortest distance between said first elongated arcuate slot and said second elongated arcuate slot is between 0.07 and 0.08mm; the shortest distance between the second arc-shaped long hole and the third arc-shaped long hole is 0.08-0.09mm.
5. A preparation method of asymmetric double hollow curled terylene, characterized in that the spinneret plate as claimed in any one of claims 1-4 is used, and FDY process is adopted, and the asymmetric double hollow curled terylene is prepared by metering, extruding, cooling, oiling, stretching, heat setting and winding of polyester melt.
6. The method for preparing asymmetric double-hollow curled terylene according to claim 5, wherein the parameters of the FDY process are as follows:
spinning temperature: 280-290 ℃;
cooling temperature: 20-25 ℃;
network pressure: 0.20MPa to 0.30MPa;
a roll speed: 1500m/min-1700m/min;
first roll temperature: 80-85 ℃;
two roll speed: 3700m/min-3800m/min;
temperature of the two rolls: 105-115 ℃;
speed of winding: 3650m/min-3740m/min.
7. An asymmetric double-hollow curled polyester prepared by the method for preparing the asymmetric double-hollow curled polyester according to any one of claims 5 to 6, wherein the cross section of the asymmetric double-hollow curled polyester is of a 9-like asymmetric double-hollow structure, the yarn evenness CV value of the asymmetric double-hollow curled polyester is 4.5 to 6.0 percent, and the yarn evenness U value of the asymmetric double-hollow curled polyester is 3.0 to 6.5 percent.
8. The asymmetric double hollow crimped polyester fiber according to claim 7, wherein the fineness of the monofilament of said asymmetric double hollow crimped polyester fiber is 4.5-7.0dtex.
9. The asymmetric double hollow crimped polyester as claimed in claim 7, wherein the fineness of the asymmetric double hollow crimped polyester is 80-170dtex, the breaking strength is not less than 3.1cN/dtex, the elongation at break is 45.0 + -6.0%, the boiling water shrinkage is 10.0-15.0%, the oil content is 0.90 + -0.20%, and the hollowness is 5-10%.
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|---|---|---|---|---|
| FR1574739A (en) * | 1967-03-14 | 1969-07-18 | ||
| CN105637128A (en) * | 2013-10-08 | 2016-06-01 | 特吕茨施勒有限及两合公司 | Spinneret for extruding self-crimping hollow fibers, self-crimping hollow fibers, and method for producing self-crimping hollow fibers |
| CN111086302A (en) * | 2019-12-31 | 2020-05-01 | 深圳市宏翔新材料发展有限公司 | Preparation method of swimming pool fabric |
| CN212025510U (en) * | 2020-04-08 | 2020-11-27 | 浦江德工精密机械有限公司 | 6-shaped hollow spinning wool fiber spinneret plate |
| WO2021135084A1 (en) * | 2019-12-29 | 2021-07-08 | 江苏恒力化纤股份有限公司 | Fiber for medical antibacterial fabric and preparation method therefor |
| CN113106565A (en) * | 2021-04-13 | 2021-07-13 | 浙江佳人新材料有限公司 | Production method of moisture-absorbing, sweat-releasing, cool and ultraviolet-resistant DTY (draw textured yarn) |
-
2022
- 2022-12-21 CN CN202211648725.2A patent/CN115807271A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1574739A (en) * | 1967-03-14 | 1969-07-18 | ||
| CN105637128A (en) * | 2013-10-08 | 2016-06-01 | 特吕茨施勒有限及两合公司 | Spinneret for extruding self-crimping hollow fibers, self-crimping hollow fibers, and method for producing self-crimping hollow fibers |
| WO2021135084A1 (en) * | 2019-12-29 | 2021-07-08 | 江苏恒力化纤股份有限公司 | Fiber for medical antibacterial fabric and preparation method therefor |
| CN111086302A (en) * | 2019-12-31 | 2020-05-01 | 深圳市宏翔新材料发展有限公司 | Preparation method of swimming pool fabric |
| CN212025510U (en) * | 2020-04-08 | 2020-11-27 | 浦江德工精密机械有限公司 | 6-shaped hollow spinning wool fiber spinneret plate |
| CN113106565A (en) * | 2021-04-13 | 2021-07-13 | 浙江佳人新材料有限公司 | Production method of moisture-absorbing, sweat-releasing, cool and ultraviolet-resistant DTY (draw textured yarn) |
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