CN110923849A - Fixed island/indefinite island type superfine fiber, superfine fiber synthetic leather and preparation method - Google Patents
Fixed island/indefinite island type superfine fiber, superfine fiber synthetic leather and preparation method Download PDFInfo
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- CN110923849A CN110923849A CN201911331593.9A CN201911331593A CN110923849A CN 110923849 A CN110923849 A CN 110923849A CN 201911331593 A CN201911331593 A CN 201911331593A CN 110923849 A CN110923849 A CN 110923849A
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide as constituent
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0004—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using ultra-fine two-component fibres, e.g. island/sea, or ultra-fine one component fibres (< 1 denier)
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2201/00—Chemical constitution of the fibres, threads or yarns
- D06N2201/10—Conjugate fibres, e.g. core-sheath, side-by-side
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/28—Artificial leather
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- 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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- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
- Multicomponent Fibers (AREA)
- Nonwoven Fabrics (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention discloses a fixed island/indefinite island type superfine fiber, superfine fiber synthetic leather and a preparation method thereof. According to the invention, through the structural design and the optimization of the formula, the islands in the superfine fiber are the same and comprise two island types of a fixed island and an indefinite island by compounding raw materials and adjusting the process under the condition of utilizing the existing raw materials and equipment. The superfine fiber synthetic leather provided by the invention is basically consistent with the fixed island fiber synthetic leather in terms of basic physical properties (including tearing strength and peeling strength) and dyeing performance (mainly friction color fastness), has the advantages of uniform dyeing, good mechanical performance and the like which are peculiar to the fixed island fiber synthetic leather, is comparable to the unfixed island superfine fiber synthetic leather in terms of hand feeling and velvet feeling, and has the advantages of the fixed island synthetic leather and the unfixed island synthetic leather.
Description
Technical Field
The invention relates to superfine fibers, superfine fiber synthetic leather and a preparation method thereof, in particular to fixed island/indefinite island type superfine fibers, superfine fiber synthetic leather and a preparation method thereof, belonging to the field of superfine fiber synthetic leather.
Background
The superfine fiber synthetic leather is similar to natural leather in appearance and performance, is compounded by superfine fibers and polyurethane, is the synthetic leather which is closest to genuine leather in the world at present, and has very wide application due to the advantages of excellent performance, various products, capability of replacing genuine leather and the like. The superfine fiber is the most basic component of the superfine fiber leather, simulates natural fiber in the aspects of composition and structure, so that the superfine fiber leather has the appearance, hand feeling and internal structure similar to real leather, and is the basis and core technology of the synthetic leather industry. Superfine fibers of different titer, type and use can be produced by different techniques, wherein the sea-island fiber is a special fiber prepared by blending or composite spinning two or more thermodynamically incompatible polymers, wherein one polymer (disperse phase, i.e. island phase, typically PA 6) is dispersed in the other polymer (continuous phase, i.e. sea phase, typically LDPE) in the form of microfine fiber, and the sea-island fiber is divided into fixed island fiber and indefinite island fiber according to the island distribution of the disperse phase.
The island composition of the fixed island fibers is continuously and uniformly distributed in the length direction, the number of the islands is fixed, the fineness of the islands is consistent, the prepared microfiber leather has the advantages of uniform dyeing, good mechanical property and the like, but the fineness of the nylon is 0.05dtex magnitude order after the fibers are extracted by toluene, so that the prepared synthetic leather has the advantages of not fine and smooth hand feeling as the fiber synthetic leather with the indefinite islands, poor hand feeling and poorer velvet feeling than the fiber synthetic leather with the indefinite islands.
The size, the number and the distribution of islands in the adventitious island fibers have certain randomness, and the fineness of the nylon after the fibers are drawn out can reach 0.003dtex, so that the prepared microfiber leather has very soft and fine handfeel and good velvet feeling, and the synthetic leather of the adventitious island fibers has poor dyeing property, is easy to dye unevenly and has poor color fastness just because the fineness of the nylon is too low.
Disclosure of Invention
The invention aims to provide fixed island/indefinite island superfine fiber, superfine fiber synthetic leather and a preparation method thereof, wherein the island phase of the fiber comprises fixed island fiber and indefinite island fiber, so that the prepared synthetic leather has the advantages of fixed island synthetic leather and indefinite island synthetic leather, and the defects of the two synthetic leathers are overcome.
The purpose of the invention is realized by the following technical scheme:
a superfine fibre for fixing or unfixing island is prepared from nylon as fixing island phase and nylon as unfixing island phase and polyolefin as sea phase through mixing.
The weight parts of the components are as follows:
fixed island phase nylon 500 parts
500 parts of adventitious island phase nylon
600 portions and 1200 portions of polyolefin;
or
Fixed island phase nylon 500 parts
Amorphous island phase nylon 300-1150 parts
1000 parts of polyolefin.
Preferably, the first and second electrodes are formed of a metal,
fixed island phase nylon 500 parts
500 parts of adventitious island phase nylon
800 portions of polyolefin and 1200 portions of polyolefin;
or
Fixed island phase nylon 500 parts
Amorphous island phase nylon 500-900 parts
1000 parts of polyolefin.
More preferably still, the first and second liquid crystal compositions are,
fixed island phase nylon 500 parts
500 parts of adventitious island phase nylon
1000 parts of polyolefin.
The fineness of the superfine fiber is 3.5-4.0 dtex.
The nylon is selected from any one of nylon 46, nylon 6, nylon 66, nylon 610, nylon 612, nylon 12 and the combination thereof;
the polyolefin is selected from any one of polyethylene, polystyrene and a combination thereof;
the polyethylene is low density polyethylene.
The preparation method of the fixed island/indefinite island type superfine fiber comprises the following steps:
(1) proportioning the nylon and the polyolefin in parts by weight in the sea phase, fully mixing to obtain a component 1, and adding the component 1 into a hopper of a sea component screw A of a double-screw fixed island spinning machine;
(2) adding the fixed island phase nylon, namely the component 2, into a charging hopper of an island component screw B of a double-screw fixed island spinning machine;
(3) carrying out melt spinning by a double-screw fixed island spinning machine, enabling the mass ratio of the extruded components 1 and 2 to be in accordance with the proportion by adjusting the frequency of a metering pump corresponding to the two screws, adjusting the temperatures of the screws and a box body, enabling the temperature of each region of the screw A to be 30-35 ℃ higher than that of each region of the screw B, enabling fixed island phases not to be fused with each other, and enabling the sizes, the number and the distribution of the fixed island phases to have specific randomness, thus obtaining the superfine fibers. See in particular the literature: zhang Dazhong, Wangrui, superfine fiber production technology and application [ M ]. Beijing: the method described in textile Press, China, 2007;
further, before the step (1), a step of drying the raw materials is also included.
The superfine fiber synthetic leather is prepared by utilizing the fixed island/indefinite island superfine fibers.
The preparation method of the superfine fiber synthetic leather comprises the following steps:
needling the non-woven fabric, ironing, dipping, reducing, expanding, drying and dyeing post-treatment. See in particular the literature: qujiabo. synthetic leather technology [ M ]. Beijing: the method described in chemical industry Press, 2015.
Compared with the prior art, the invention has the following beneficial effects:
under the condition of utilizing the existing raw materials and equipment, the islands in the superfine fibers simultaneously comprise two island types of a fixed island and an indefinite island through raw material compounding and process adjustment, and the prepared superfine fiber synthetic leather has the advantages of the fixed island synthetic leather and the indefinite island synthetic leather under the condition of not reducing the physical properties of the product.
Drawings
FIG. 1 is a schematic view of the structure of ultrafine fibers of island-fixed/island-indefinite type according to the present invention
Detailed Description
Example 1
The raw materials and weights used in this example are shown in Table 1.
Table 1: materials and weights used in the examples
The method for preparing the fixed island/indefinite island PA6/LDPE superfine fiber synthetic leather implemented in the embodiment is as follows:
(1) the nylon 6 is placed in a vacuum oven at 120 ℃ to be dried for more than 5 hours, so that the moisture content is lower than 0.05 percent before use, the water absorption of the LDPE is not strong, and the drying is not needed. The raw material selection of the invention meets the following conditions: the execution standard of nylon 6 is EMS-INVENTA IQ 80512-80524; the performance standard for LDPE is GB 11115-1989;
(2) wherein, the PA6 and the LDPE in the step (1) are respectively taken for 500Kg and 1000Kg for proportioning and fully mixed to be called as a component 1, and the component 1 is added into a feed hopper of a screw A (namely a sea component screw) of a double-screw fixed island spinning machine; adding 500Kg of PA6 named as component 2 in the step (1) into a hopper of a screw B (namely an island component screw);
(3) and (3) carrying out melt spinning by using a twin-screw fixed-island spinning machine, and adjusting the frequency of a metering pump corresponding to the two screws to ensure that the mass ratio of the component 1 to the component 2 in the step (2) is 3: 1. The temperature of the screw and the box body is adjusted to ensure that the temperature of each area of the screw A is 30-35 ℃ higher than that of each area of the screw B, so that the island phases of the fixed island are not fused with each other (namely, parallel island), and the size, the number and the distribution of the island phases of the fixed island have special randomness, particularly shown in figure 1;
(4) the fiber prepared in the step (3) is subjected to a normal superfine fiber synthetic leather process, which comprises the steps of needling non-woven fabric, ironing, dipping (using polyether polyurethane DMF dispersion liquid with the solid content of 21 percent for the conventional gloves of the company), reducing weight, expanding, drying, dyeing post-treatment and the like to prepare the superfine fiber synthetic leather.
(5) In contrast, the same raw material proportion as that of the invention is adopted, the common figured fiber is prepared by melt spinning through a double-screw figured island spinning machine, the common figured island fiber is prepared by a single-screw figured island spinning machine, and the temperature of a screw and a box body is consistent with that of the invention. The recipe is shown in table 2.
Table 2: raw materials and weight for contrast fiber
(6) And (4) carrying out the same process as the process in the step (4) on the fiber prepared in the step (5), and preparing the common figured island superfine fiber synthetic leather and the common indefinite island superfine fiber synthetic leather by the steps of needling non-woven fabric (the non-woven fabric is prepared by using the short fibers in the same weight part under the condition of ensuring the same thickness), ironing, dipping, reducing, expanding, drying, dyeing post-treatment and the like.
(7) And (4) sampling the synthetic leather prepared in the step (4) and the synthetic leather prepared in the step (6) for testing, wherein the thicknesses and the gram weights of the three synthetic leathers are ensured to be the same, so that transverse comparison is convenient, and the specific table is shown in table 3. The thickness detection method is based on GB/T8948-. The hand feeling and the velvet feeling detection method judges the grade according to the internal standard of the company and the comparison with a standard sample.
Table 3: physical property comparison of three synthetic leathers
(8) As can be seen from Table 3, the basic physical properties (including tear strength and peel strength) and the dyeing properties (mainly friction color fastness) of the superfine fiber synthetic leather of the invention are basically consistent with those of the figured fiber synthetic leather, the advantages of uniform dyeing, good mechanical properties and the like which are peculiar to the figured fiber synthetic leather are shown, and the advantages of the figured fiber synthetic leather and the unfixed island superfine fiber synthetic leather are comparable to those of the hand feeling and the velvet feeling, so that the finished superfine fiber synthetic leather of the invention has the advantages of the figured fiber synthetic leather and the unfixed island synthetic leather, and the defects of the two synthetic leathers are overcome.
Example 2
The present embodiment selects different mixture ratios, mainly adjusts the proportion of LDPE in the fiber, and spins the fixed island/indefinite island type PA6/LDPE superfine fiber of the present invention. The specific configuration is as shown in Table 4.
Table 4: different proportions of raw materials
(component 1= LDPE + adventitious island phase PA6 portion, component 2= adventitious island phase PA6 portion)
The method for preparing the fixed island/indefinite island PA6/LDPE superfine fiber synthetic leather implemented in the embodiment is as follows:
(1) the nylon 6 is placed in a vacuum oven at 120 ℃ to be dried for more than 5 hours, so that the moisture content is lower than 0.05 percent before use, the water absorption of the LDPE is not strong, and the drying is not needed. The raw material selection of the invention meets the following conditions: the execution standard of nylon 6 is EMS-INVENTA IQ 80512-80524; the performance standard for LDPE is GB 11115-1989;
(2) proportioning the raw materials in the step (1), mixing LDPE (Low-Density polyethylene) with an adventitious island phase PA6 to obtain a component 1, mixing the island phase PA6 with the component 2, carrying out melt spinning by using a double-screw island-fixed spinning machine, adjusting the frequencies of metering pumps corresponding to two screws to ensure that the mass ratio of the component 1 to the component 2 extruded in the step (2) is the mass ratio of the component 1 to the component 2 in the table 4, and adjusting the temperatures of the screws and a box body to ensure that the temperature of each zone of the screw A is 30-35 ℃ higher than that of each zone of the screw B for spinning;
performing physical property and island type tests on the fibers obtained in the step (2), wherein the detection basis is the internal standard of the company, and the specific results are shown in Table 5; as can be seen from table 5, when the fiber fineness was substantially the same, the maximum value was exhibited in the fiber produced by blending No. 4 fibers (i.e., 500 parts of nylon with fixed island phase, 500 parts of nylon with indefinite island phase, and 1000 parts of LDPE with sea phase) as the breaking work mainly for evaluating the physical properties of the fibers. When the LDPE proportion is 37.5 percent (namely when the indefinite island phase is 500Kg, the definite island phase is 500Kg, and the sea phase LDPE is 600 Kg), the fibers have extremely small islands, the quality of the prepared fibers is unqualified, which means that 37.5 percent is the lower limit of the LDPE proportion, and when the LDPE proportion is higher, although the island type of physical properties meet the standard in all aspects, because the LDPE is dissolved in the subsequent weight reduction process and is not an effective component of synthetic leather base cloth, the production cost is greatly improved due to the excessively high proportion of the LDPE, and generally the LDPE proportion is less than 55 percent from the economical point of view, namely when the indefinite island phase is 500Kg, the definite island phase is 500Kg, and the sea phase LDPE is 1200 Kg. In conclusion, the invention has the proportioning range of 500 parts of nylon with fixed island phase, 500 parts of nylon with indefinite island phase and 600-1200 parts of LDPE, and the optimal proportioning is 500 parts of nylon with fixed island phase, 500 parts of nylon with indefinite island phase and 1000 parts of LDPE.
Table 5: fiber physical Properties and island type comparison in example 2
Example 3
The present invention uses different mixture ratios to mainly adjust the proportion of the amorphous island phase PA6 in the fiber to spin the amorphous island type PA6/LDPE superfine fiber. The specific configuration is as shown in Table 6.
Table 6: different proportions of raw materials
(component 1= LDPE + adventitious island phase PA6 portion, component 2= adventitious island phase PA6 portion)
(1) The nylon 6 is placed in a vacuum oven at 120 ℃ to be dried for more than 5 hours, so that the moisture content is lower than 0.05 percent before use, the water absorption of the LDPE is not strong, and the drying is not needed. The raw material selection of the invention meets the following conditions: the execution standard of nylon 6 is EMS-INVENTA IQ 80512-80524; the performance standard for LDPE is GB 11115-1989;
(2) proportioning the raw materials in the step (1), mixing sea-phase LDPE with an indefinite island part in an island-phase PA6 to obtain a component 1, mixing a fixed island part in an island-phase PA6 to obtain a component 2, carrying out melt spinning by a double-screw fixed island spinning machine, adjusting the frequencies of metering pumps corresponding to two screws to ensure that the mass ratio of the component 1 to the component 2 extruded in the step (2) is respectively the mass ratio of the component 1 to the component 2 in the table 6, and adjusting the temperatures of the screws and a box body to ensure that the temperature of each area of the screw A is 30-35 ℃ higher than that of each area of the screw B for spinning;
(3) performing physical property and island type tests on the fibers obtained in the step (2), wherein the detection basis is the internal standard of the company, and the specific results are shown in Table 7;
table 7: fiber physical Properties and island type comparison in example 3
As can be seen from table 7, when the fiber fineness was substantially the same, the maximum value was exhibited in the breaking work which is the main basis for evaluating the physical properties of the fibers, in the fibers prepared by blending No. 2 fibers (i.e., 500 parts of nylon with fixed island phase, 500 parts of nylon with indefinite island phase, and 1000 parts of LDPE with sea phase). When the LDPE proportion is 37.74 percent (namely 1150Kg of the indefinite island phase, 500Kg of the definite island phase and 1000Kg of the sea phase LDPE), a very small amount of islands occur in the fiber, the quality of the prepared fiber is unqualified, which indicates that 37.74 percent is the lower limit of the LDPE proportion in the embodiment, and when the LDPE proportion is higher, although all aspects of the island type of the physical property meet the standards, because the LDPE is dissolved in the subsequent weight reduction process and is not an effective component of synthetic leather base cloth, the high proportion of the LDPE can greatly improve the production cost, and generally the LDPE proportion is lower than 55 percent from the economical point of view, namely when the indefinite island phase is 300Kg, the definite island phase is 500Kg, and the sea phase LDPE is 1000 Kg. In conclusion, the invention has the matching range of 500 parts of fixed island phase nylon, 1000 parts of sea phase LDPE, 300 parts of indefinite island phase nylon and 1150 parts, and the optimal matching range of 500 parts of fixed island phase nylon, 1000 parts of sea phase LDPE and 500 parts of indefinite island phase nylon.
Claims (10)
1. A superfine fibre for fixing or unfixing island is prepared from nylon as fixing island phase and nylon as unfixing island phase and polyolefin as sea phase through mixing.
2. The superfine fiber of claim 1, wherein the weight parts of the components are as follows:
fixed island phase nylon 500 parts
500 parts of adventitious island phase nylon
600 portions and 1200 portions of polyolefin;
or
Fixed island phase nylon 500 parts
Amorphous island phase nylon 300-1150 parts
1000 parts of polyolefin;
preferably, the first and second electrodes are formed of a metal,
fixed island phase nylon 500 parts
500 parts of adventitious island phase nylon
800 portions of polyolefin and 1200 portions of polyolefin;
or
Fixed island phase nylon 500 parts
Amorphous island phase nylon 500-900 parts
1000 parts of polyolefin;
more preferably still, the first and second liquid crystal compositions are,
fixed island phase nylon 500 parts
500 parts of adventitious island phase nylon
1000 parts of polyolefin.
3. The ultrafine fiber according to any one of claims 1 to 2, wherein the fineness is 3.5 to 4.0 dtex.
4. The ultrafine fiber according to any one of claims 1 to 2, wherein the nylon is selected from any one of nylon 46, nylon 6, nylon 66, nylon 610, nylon 612, nylon 12, and a combination thereof.
5. The ultrafine fiber according to any one of claims 1 to 2, wherein the polyolefin is selected from any one of polyethylene, polystyrene, and a combination thereof.
6. The microfiber according to claim 5, wherein said polyethylene is low density polyethylene.
7. The method for preparing ultrafine fibers of island/islands type according to claims 1 to 6, comprising the steps of:
(1) proportioning the nylon of the adventitious island phase and the polyolefin in parts by weight in the sea phase, fully mixing to obtain a component 1, and adding the component 1 into a feed hopper of a sea component screw A of a double-screw fixed island spinning machine;
(2) adding the fixed island phase nylon, namely the component 2, into a charging hopper of an island component screw B of a double-screw fixed island spinning machine;
(3) carrying out melt spinning by a double-screw fixed island spinning machine, enabling the mass ratio of the extruded components 1 and 2 to be in accordance with the proportion by adjusting the frequency of a metering pump corresponding to the two screws, adjusting the temperatures of the screws and a box body, enabling the temperature of each region of the screw A to be 30-35 ℃ higher than that of each region of the screw B, enabling fixed island phases not to be fused with each other, and enabling the sizes, the number and the distribution of the fixed island phases to have specific randomness, thus obtaining the superfine fibers.
8. The method according to claim 7, wherein the step (1) is preceded by a step of drying the raw material.
9. An ultrafine fiber synthetic leather produced by using the island-fixed/island-indefinite ultrafine fibers according to claims 1 to 6.
10. The method for preparing the superfine fiber synthetic leather according to claim 9, which is characterized by comprising the following steps:
needling the non-woven fabric, ironing, dipping, reducing, expanding, drying and dyeing post-treatment.
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| CN112239897A (en) * | 2020-09-24 | 2021-01-19 | 上海华峰超纤科技股份有限公司 | Island-in-island fiber and application thereof in PU leather |
| CN114014969A (en) * | 2021-11-15 | 2022-02-08 | 上海华峰新材料研发科技有限公司 | Water-soluble polymer and preparation method and application thereof |
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| CN103114458A (en) * | 2013-01-24 | 2013-05-22 | 嘉兴学院 | Preparation method of high-density and high-physical-property suede superfine fiber artificial leathers |
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| GB1306974A (en) * | 1970-07-16 | 1973-02-14 | Toray Industries | Synthetic fine filament bundle and island-in-a-sea- type composite filament usable for manufacturing the bundle and processes of manufacturing the same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112239897A (en) * | 2020-09-24 | 2021-01-19 | 上海华峰超纤科技股份有限公司 | Island-in-island fiber and application thereof in PU leather |
| CN112239897B (en) * | 2020-09-24 | 2023-01-13 | 上海华峰超纤科技股份有限公司 | Island-in-island fiber and application thereof in PU leather |
| CN114014969A (en) * | 2021-11-15 | 2022-02-08 | 上海华峰新材料研发科技有限公司 | Water-soluble polymer and preparation method and application thereof |
| CN114014969B (en) * | 2021-11-15 | 2023-08-11 | 上海华峰新材料研发科技有限公司 | Water-soluble polymer and preparation method and application thereof |
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| CN110923849B (en) | 2022-05-20 |
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