CN216550841U - Bi-component composite monofilament - Google Patents
Bi-component composite monofilament Download PDFInfo
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- CN216550841U CN216550841U CN202120934446.7U CN202120934446U CN216550841U CN 216550841 U CN216550841 U CN 216550841U CN 202120934446 U CN202120934446 U CN 202120934446U CN 216550841 U CN216550841 U CN 216550841U
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Abstract
The utility model relates to a bi-component composite monofilament, which consists of a skin layer and a core layer and is characterized in that: the skin layer is coated on the core layer, the skin layer is made of modified low-melting-point polyester materials, the core layer is made of low-melting-point PET materials, and the melting point temperature of the skin layer is smaller than that of the core layer. After the scheme is adopted, the bi-component composite monofilament has good extensibility, good flexibility, folding resistance and low hot-melt bonding firmness and shrinkage rate, is well formed by being mixed and woven with polyester yarn fabrics at a high-temperature compression mold, and has the advantages of ironing smoothness and good mechanical resistance.
Description
Technical Field
The utility model relates to the technical field of spinning, and relates to a two-component composite monofilament.
Background
In order to realize the stability of products in the field of shoe materials in the market at present, a heating fuse is used for fixing and supporting in the weaving process, the novel yarn can be used for replacing the heating fuse, the same yarn fixing and yarn supporting effects can be achieved by weaving a small amount of yarn, and the novel yarn has wide application prospects.
The prior art mainly has the following defects: the existing produced monofilament has poor extensibility, low shrinkage rate of hot melt bonding, and unstable breaking strength and elongation index of the silk thread.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the monofilament, the utility model provides a bi-component composite monofilament and a preparation method thereof.
The utility model discloses a bi-component composite monofilament, which consists of a skin layer and a core layer and is characterized in that: the skin layer coats the core layer, the skin layer is made of modified low-melting-point polyester material, the core layer is made of low-melting-point PET material, the melting point temperature of the skin layer is lower than that of the core layer,
preferably, the modified low-melting-point polyester material is terylene or composite fiber compounded by terylene and low-melting-point copolyester.
Preferably, the composite fiber is one of PTT/PET, PBT/PET, PET/PA and PET/PP.
Preferably, the skin layer and the core layer are both made of polyester materials.
Preferably, the difference between the melting points of the skin layer and the core layer is 30 to 160 ℃.
Preferably, the melting point of the skin layer is 90-180 ℃.
Preferably, the melting point of the core layer is 210-250 ℃.
Preferably, the fineness of the composite monofilament is 66-990 dtex.
Preferably, the diameter of the composite monofilament is 0.07-0.35 mm.
The utility model also discloses a preparation method of the bi-component composite monofilament, wherein the skin layer and the core layer are prepared by screw melt extrusion, metering by a metering pump, spinning by a spinneret plate, cooling by a cooling water tank, stretching by a multi-stage drawing roller, heat setting, oiling and winding, and the preparation method comprises the following steps:
(1) melt extrusion, working temperature of screw extruder: the skin layer is 180 DEG and 230 DEG, and the core layer is 230 DEG and 270 DEG;
(2) metering: the component A and the component B are metered by a metering pump and quantitatively pressed into a spinning component;
(3) carrying out spinning by a two-component spinneret plate, wherein the diameter of a spinneret orifice of the spinneret plate is phi 0.4-phi 0.6 mm;
(4) cooling, wherein the temperature of cooling water is 40-70 ℃;
(5) the rotating speed of the first stretching roller is 20-50 m/min;
(6) stretching in a water bath, wherein the temperature of a hot water drawing tank is 70-95 ℃;
(7) the rotating speed of the second stretching roller is 80-160 m/min;
(8) hot air stretching is carried out, and the temperature of a hot air drafting box is 120-160 ℃;
(9) a third stretching roller, wherein the rotating speed of the third stretching roller is 80-160 m/min;
(10) heat setting, wherein the temperature of a drawing heat setting box is 130-160 ℃;
(11) a fourth stretching roller, wherein the rotating speed of the fourth stretching roller is 80-160 m/min;
(12) oiling by an oiling device, wherein the amount of oiling is controlled to be 0.5-0.7%;
(13) winding and forming, wherein the winding speed is 120 and 160 mmin;
preferably, the breaking strength of the bicomponent composite monofilament is 3.8-5.8cN/dtex, the CV value of the breaking strength variation coefficient is 1.6% (≦ 7%), the CV value of the elongation at break variation coefficient is 2.5% (≦ 4%), and the oil content is 0.05-0.70 wt%.
Preferably, the elongation at break of the bicomponent composite monofilament is 20-45%.
Preferably, the linear density deviation ratio of the bicomponent composite monofilament is ± 5%.
By adopting the technical scheme, the utility model has the beneficial effects that:
1. the composite monofilament is prepared by taking the modified PET polyester with the low melting point of 90-180 ℃ as an outer skin layer, taking the PET polyester with the core layer as 210-250 ℃ low melting point composite according to a monofilament process, and simultaneously performing drawing and shaping after the skin layer with the low melting point and the core layer are subjected to hot melt bonding and compounding. Its advantages are high adhesion, shaping and stability at 90-180 deg.C, and high tension, elasticity and folding resistance of core wire.
2. Through adopting the compound spinning melting method to prepare two ingredient skin core monofilaments, respectively with modified low melting point polyester as the skin layer material, low melting point PET polyester is the sandwich layer material and according to compound monofilament technology respectively through two sets of screw rod melt extrusion, measuring pump measurement, spinneret compound spinning, cooling trough cooling, drawing through multistage draft roller, thermoforming, oil and coiling and make the monofilament, wherein, the quality ratio of skin layer and sandwich layer can be divided into 50: 50. 20:80, 30:70, 40:60, and the sheath layer and the core layer are subjected to high-temperature melting and are simultaneously subjected to combined spinning and bonding on a spinneret plate, so that the single-filament composite filament has the performance of common monofilaments and the characteristics of the composite monofilaments and the thermal fuses.
3. The bi-component composite monofilament has good extensibility, good flexibility, folding resistance, low hot-melt bonding and shrinkage rate, good molding performance in high-temperature compression molding after being mixed and woven with polyester yarn fabrics, smooth ironing and good mechanical resistance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only one or several embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to such drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a bicomponent composite monofilament of the present invention;
FIG. 2 is a flow chart of the manufacturing process of the bicomponent composite monofilament of the present invention.
Description of the main reference numbers: 1. a skin layer; 2. a core layer.
Detailed Description
The following detailed description will be made with reference to the accompanying drawings and examples to solve the technical problems of the present invention by applying technical means, and to fully understand and implement the technical effects of the present invention. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the utility model. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details or with other methods described herein.
Example 1
Referring to fig. 1-2, a compound monofilament of bi-component, compound monofilament comprises cortex 1 and sandwich layer 2, and 1 cladding sandwich layer 2 of cortex, 1 material of cortex are modified low melting point polyester material, and modified low melting point polyester material is the dacron, and sandwich layer 2 is low melting point PET material, and the melting point temperature of 1 of cortex is less than the melting point temperature of sandwich layer 2, and the proportional range between 1 of cortex and 2 polyesters of sandwich layer is 50 according to the mass ratio: 50. the melting point difference between the skin layer 1 and the core layer 2 is 100-140 ℃, the melting point of the skin layer 1 is 90-110 ℃, the melting point of the core layer 2 is 210-230 ℃, the fineness of the composite monofilament is 66-990dtex, and the diameter of the composite monofilament is 0.1-0.15 mm.
Example 2
Referring to fig. 1-2, a bi-component composite monofilament, the composite monofilament is composed of a skin layer 1 and a core layer 2, the skin layer 1 covers the core layer 2, the skin layer 1 is made of a modified low-melting-point polyester material, the modified low-melting-point polyester material is polyester, the core layer 2 is made of a low-melting-point PET material, the melting point temperature of the skin layer 1 is less than that of the core layer 2, and the proportion range between the skin layer 1 and the polyester of the core layer 2 is 50: 50. the melting point difference between the skin layer 1 and the core layer 2 is 30-80 ℃, the melting point of the skin layer 1 is 150-180 ℃, the melting point of the core layer 2 is 210-230 ℃, the titer of the composite monofilament is 66-333dtex, and the diameter of the composite monofilament is 0.1-0.15 mm.
Example 3
Referring to fig. 1-2, a compound monofilament of bi-component, compound monofilament comprises cortex 1 and sandwich layer 2, and 1 cladding sandwich layer 2 of cortex, 1 material of cortex are modified low melting point polyester material, and modified low melting point polyester material is the dacron, and sandwich layer 2 is low melting point PET material, and the melting point temperature of 1 of cortex is less than the melting point temperature of sandwich layer 2, and the proportional range between 1 of cortex and 2 polyesters of sandwich layer is 50 according to the mass ratio: 50. the melting point difference between the skin layer 1 and the core layer 2 is 80-140 ℃, the melting point of the skin layer 1 is 110-140 ℃, the melting point of the core layer 2 is 220-.
Example 4
Referring to fig. 1-2, this embodiment is different from embodiments 1-3 in that the sheath material is a composite fiber, the composite fiber is one of PTT/PET, PBT/PET, PET/PA and PET/PP, and any one of PTT/PET, PBT/PET, PET/PA and PET/PP, and the ratio of its two components can be 50: 50. 20:80, 30:70 and 40: 60.
Example 5
Referring to fig. 1 to 2, the present embodiment is different from embodiments 1 to 3 in that the skin layer 1 and the core layer 2 are both made of polyester materials, and the ratio between the polyester of the skin layer 1 and the polyester of the core layer 2 ranges from 50: 50. 20:80, 30:70 or 40: 60.
Example 6
Referring to fig. 1-2, a method for preparing a bicomponent composite monofilament, which is prepared by melting and extruding a sheath layer 1 and a core layer 2 by a screw, metering by a metering pump, spinning by a spinneret plate, cooling by a cooling water tank, stretching by a multistage drawing roller, heat setting, oiling and winding, comprises the following steps:
(1) melt extrusion, working temperature of screw extruder: the skin layer is 230 ℃ and the core layer is 270 ℃;
(2) metering: the component A and the component B are metered by a metering pump and quantitatively pressed into a spinning component;
(3) carrying out spinning by a two-component spinneret plate, wherein the diameter of a spinneret orifice of the spinneret plate is phi 0.4-phi 0.6 mm;
(4) cooling, wherein the temperature of cooling water is 40-70 ℃;
(5) the rotating speed of the first stretching roller is 28 m/min;
(6) stretching in a water bath, wherein the temperature of a drawing hot water tank is 85 ℃;
(7) a second stretching roller, wherein the rotating speed of the second stretching roller is 138 m/min;
(8) hot air stretching is carried out, and the temperature of a hot air box is 140 ℃;
(9) a third stretching roller, wherein the rotating speed of the third stretching roller is 150 m/min;
(10) heat setting, wherein the temperature of a drawing heat setting box is 150 ℃;
(11) a fourth stretching roller, wherein the rotating speed of the fourth stretching roller is 147 m/min;
(12) oiling by an oiling device, wherein the amount of oiling is controlled to be 0.5-0.7%;
(13) winding and forming, wherein the winding speed is 150 mmin;
furthermore, the rupture strength of the bicomponent composite monofilament is 4.5cN/dtex, the coefficient of variation CV of the rupture strength is 1.6%, the coefficient of variation CV of the elongation at break is 4%, the oil content is 0.05-0.70 wt%, the degree of monofilament fiber is 66-333dtex, the cross section of phi 0.1 mm-phi 0.15mm is circular, triangular, quadrilateral or other geometric figures, and the deviation rate of linear density is +/-5%.
Example 7
Referring to fig. 1-2, a method for preparing a bicomponent composite monofilament, which is prepared by melting and extruding a sheath layer 1 and a core layer 2 by a screw, metering by a metering pump, spinning by a spinneret plate, cooling by a cooling water tank, stretching by a multistage drawing roller, heat setting, oiling and winding, comprises the following steps:
(1) melt extrusion, working temperature of screw extruder: the skin layer is 180 ℃ and the core layer is 230 ℃;
(2) metering: the component A and the component B are metered by a metering pump and quantitatively pressed into a spinning component;
(3) carrying out spinning by a two-component spinneret plate, wherein the diameter of a spinneret orifice of the spinneret plate is phi 0.4-phi 0.6 mm;
(4) cooling, wherein the temperature of cooling water is 40-50 ℃;
(5) the rotating speed of the first stretching roller is 20-40 m/min;
(6) stretching in water bath, wherein the temperature of a drafting hot water tank is 70-90 ℃;
(7) a second stretching roller with the rotation speed of 100-140 m/min;
(8) hot air stretching is carried out, and the temperature of a hot air drafting box is 130-150 ℃;
(9) a third stretching roller with the rotating speed of 100-;
(10) heat setting, wherein the temperature of a drawing heat setting box is 135-155 ℃;
(11) a fourth stretching roller with the rotating speed of 100-;
(12) oiling by an oiling device, wherein the amount of oiling is controlled to be 0.5-0.7%;
(13) winding and forming at a winding speed of 148 mmin;
furthermore, the breaking strength of the bicomponent composite monofilament is 4.5cN/dtex, the coefficient of variation CV of the breaking strength is 1.6%, the coefficient of variation CV of the elongation at break is 2.5%, the oil content is 0.05-0.70 wt%, the degree of monofilament fiber is 66-220dtex, the cross section of phi 0.1 mm-phi 0.15mm is circular, and the deviation rate of linear density is 2%.
The finished product of the polyester fiber is a partially crystallized supermolecular structure, molecular chains of the crystallized parts of the polyester fiber are mutually parallel and mostly present a trans conformation, and an amorphous area is mostly present a cis conformation. The prepared bi-component composite monofilament has good extensibility, good flexibility, folding resistance, low hot-melt bonding and shrinkage rate, good molding performance when being mixed and woven with polyester yarn fabrics at high temperature and compression molding, smooth ironing and mechanical resistance. The utility model can be made into sheath-core composite monofilament and composite fiber, and can also be applied to the fields of clothing, shoe materials, home textiles, automobiles, medical treatment and health care and the like.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the utility model, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the utility model.
Claims (9)
1. A bicomponent composite monofilament comprised of a sheath and a core, characterized in that: the skin layer is coated on the core layer, the skin layer is made of modified low-melting-point polyester materials, the core layer is made of low-melting-point PET materials, and the melting point temperature of the skin layer is smaller than that of the core layer.
2. The bicomponent composite monofilament according to claim 1, wherein: the modified low-melting-point polyester material is polyester or composite fiber compounded by polyester and low-melting-point copolyester.
3. The bicomponent composite monofilament according to claim 2, wherein: the composite fiber is one of PTT/PET, PBT/PET, PET/PA and PET/PP.
4. The bicomponent composite monofilament according to claim 1, wherein: the skin layer and the core layer are both made of polyester materials.
5. The bicomponent composite monofilament according to claim 4, wherein: the melting point difference between the skin layer and the core layer is 30-160 ℃.
6. The bicomponent composite monofilament according to claim 1, wherein: the melting point of the skin layer is 90-180 ℃.
7. The bicomponent composite monofilament according to claim 1, wherein: the melting point of the core layer is 210-250 ℃.
8. The bicomponent composite monofilament according to claim 1, wherein: the titer of the composite monofilament is 66-333 dtex.
9. The bicomponent composite monofilament according to claim 1, wherein: the diameter of the composite monofilament is 0.07-0.35 mm.
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| CN113151913A (en) * | 2021-05-03 | 2021-07-23 | 晋江市成东纺织有限公司 | Bi-component composite monofilament and preparation method thereof |
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| CN113151913A (en) * | 2021-05-03 | 2021-07-23 | 晋江市成东纺织有限公司 | Bi-component composite monofilament and preparation method thereof |
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