TWI625435B - Method for producing island-type colored composite filament and method for preparing colored artificial leather fabric - Google Patents

Abstract

The present invention provides a method for preparing a colored artificial leather fabric by mixing a polypropylene material with a masterbatch before the spinning process to obtain a colored polypropylene material; and heating the colored polypropylene material and the soluble polymer material. Melting, and co-spinning to form an island-in-the-sea polypropylene composite color yarn by sea-island composite spinning method; the colored polypropylene fiber obtained by weaving is subjected to dissolution and fission treatment to obtain a colored artificial leather fabric. Accordingly, the method of producing the colored artificial leather fabric can produce a colored artificial leather fabric without using a metallocene catalyst or a high-pressure water jet of energy consumption, so that the colored artificial leather fabric can have a peach fabric. The soft feel of the suede fabric or the alpaca fabric, and the different colors can be displayed according to the requirements to obtain a better design feeling.

Description

Method for producing island-type colored composite filament and method for preparing colored artificial leather fabric

The invention relates to the field of textile manufacturing, in particular to a method for preparing a colored composite filament and a colored artificial leather fabric such as a peach-like fabric, a suede-like fabric or an alpaca-like fabric.

Common thermoplastic plastic pellets on the market include polyester colloidal particles, nylon colloidal particles or polypropylene colloidal particles; compared to polyester colloidal particles and nylon colloidal particles, polypropylene colloidal particles have lower glass transition temperatures (glass) Transition temperature, Tg) and low thermal conductivity, so polypropylene textiles can not only maintain the rubber state in low temperature environment, but also have excellent thermal insulation effect, and become a warm sanitation for cold regions. Product. In addition, polypropylene rubber pellets have the characteristics of low melting point, low water absorption, low density (0.91g/cm ³ ), acid and alkali resistance, etc., so polypropylene textiles can be more energy-saving, carbon-reducing, easy to process, and avoid bacteria. Breeding and suitable for the manufacture of life jackets that are light and floatable on the surface.

In order to further enhance the applicability of polypropylene textiles, the prior art attempts to develop various processing methods for polypropylene pellets in order to develop a polypropylene fiber suitable for the manufacture of polypropylene fabrics of high bulk and high flexibility. For example, PCT Patent Publication No. 2012126973 discloses a method for producing a polypropylene fine fiber by first using a propylene monomer as a raw material and polymerizing into a polypropylene spun rubber colloid under the action of a metallocene catalyst. After the polypropylene polymer spun rubber particles are spun to form polypropylene filaments, at least 1.0 denier polypropylene fine fibers are obtained through elongation processing.

In order to further refine the fineness of the polypropylene fine fiber, Japanese Patent Laid-Open Publication No. 2003/138428 discloses another method for producing a polypropylene fine fiber, which also requires a metallocene catalyst in the polymerization reaction. Polymerized polypropylene polymer spun granules having a molecular weight distribution of 2 to 3 and high-density polyethylene spun two-component conjugate fibers; and then subjected to elongation processing and high-pressure water jet treatment to make the two components The composite fiber is cracked to obtain a polypropylene fine fiber.

However, both of the above-mentioned patent publications require additional polymerization using a metallocene catalyst to spin the fine polypropylene fibers of the fine denier; and the manufacturing method disclosed in the aforementioned Japanese Patent Publication requires such a double The composite fiber is subjected to high-pressure water jet treatment to obtain finer denier polypropylene fibers. Therefore, the prior art manufacturing method not only requires a specific catalyst for polymerization, but also requires a relatively high resource for the fission treatment, and is not suitable for industrial economic utilization.

In addition to the aforementioned requirements for richness and softness, the prior art has a design sense in order to simultaneously impart a desired color to the polypropylene textile, and the polypropylene composite yarn is first woven into a cloth, and the fabric is subjected to a fission treatment. After obtaining the artificial leather fabric of the ultrafine fiber, the whole artificial leather fabric having the ultrafine fiber is dyed, so that the polypropylene textile can have both richness, softness and desired color appearance.

However, it takes 100 tons of water to dye one ton of polypropylene textile by the aforementioned dyeing process, which causes problems such as high energy loss and water pollution in the dyeing process; in addition, since the dye molecules are only dyed on the fiber surface, Therefore, the prior art method has the disadvantage of insufficient color fastness.

In order to overcome the deficiencies of the prior art, the object of the present invention is to simplify the process complexity of the prior art polypropylene microfibers, so that it can be applied to industrial mass production such as peach skin-like fabrics. ), colored artificial leather fabrics such as suede-like fabrics and/or Alpaca wool-like fabrics. The imitation peach fabric is a short-wool fabric covered with a plurality of microfibers, the surface of which is like a peach surface and has a comfortable and soft hand; the suede fabric has a short surface covered with a plurality of microfibers. The velvet fabric has a comfortable, soft hand on the surface of the suede; the alpaca fabric is a long-wool fabric covered with a plurality of microfibers, and the surface is like alpaca and has a bulky, comfortable and soft surface. Feeling.

Another object of the present invention is to improve the prior art method of making colored artificial leather fabrics to improve the color fastness of colored artificial leather fabrics.

In order to achieve the foregoing object, a method for producing an island-in-the-sea colored composite filament comprises: mixing a polypropylene material and a plurality of masterbatch to obtain a colored polypropylene material; heating a colored polypropylene material and a soluble polymer material; Melting a colored polypropylene melt and a soluble polymer melt separately; co-spinning the colored polypropylene melt and the soluble polymer melt by an island-in-the-sea composite spinning method to form an island type The colored composite filaments comprise a plurality of colored polypropylene fibers and a soluble outer layer of polymer, and the outer layer of the soluble polymer is coated around the colored polypropylene fibers.

Preferably, the soluble polymer material is a modified polyester material, and the soluble polymer melting system is a modified polyester melt, also known as easy solvable polyester (ESPET). The intrinsic viscosity of the modified polyester melt is between 0.45 dL/g and 0.65 dL/g.

Preferably, the color masterbatch is used in an amount of from 4 to 10% by weight based on the total colored polypropylene material, and the masterbatch has a particle diameter of from 250 nm to 450 nm.

Preferably, the polypropylene material has a melting point of 160 ° C to 175 ° C, the color masterbatch has a melting point of 150 ° C to 190 ° C, and the soluble polymer material has a melting point of 165 °. C to 240 ° C.

Preferably, the colored polypropylene melt comprises a polypropylene melt and a masterbatch melt having a melt flow index (MFI) of 10 g/10 min to 40 g/10 Between minutes, the melt flow index of the masterbatch melt is between 5 g/10 min and 40 g/10 min; and the intrinsic viscosity of the soluble polymer melt is 0.45 dL/g to Between 0.65dL/g.

Preferably, the weight ratio of the colored polypropylene material to the soluble polymer material is between 60:40 and 80:20.

Preferably, in the above method, the method comprises heating the colored polypropylene material to between 210 ° C and 240 ° C to melt the colored polypropylene melt, and heating the soluble polymer material to 240. The soluble polymer melt is formed by melting between ° C and 270 ° C.

Preferably, the step of co-spinning the colored polypropylene melt and the soluble polymer melt by the island-in-the-sea composite spinning method to form the sea-island type colored composite filament comprises: the colored polypropylene melt And the soluble polymer melt flows through a composite spinning nozzle, the diameter of the spinning spout of the composite spinning nozzle is between 0.15 mm and 0.40 mm; and the spinning speed is 2000 to 2800 m/min. Spinning the colored polypropylene melt and the soluble polymer melt to form the sea-island type colored composite filament, the sea-island type colored composite filament comprising 24 to 72 colored polypropylene fibers, each colored poly The fineness of propylene fiber is between 0.04 Danny and 0.2 Danny.

The invention provides a method for preparing a colored artificial leather fabric, comprising: providing a first island-in-sea type colored composite filament, which is obtained by the method as described above; Yarn and the first island-type colored composite filament to obtain a first polypropylene composite yarn; weaving the first polypropylene composite yarn to form a colored polypropylene fabric; and dissolving the colored using a solvent The outer layer of each of the first polypropylene composite color yarns in the polypropylene fabric is soluble to obtain the colored artificial leather fabric, wherein the colored artificial leather fabric comprises the first colored polypropylene fibers, and the first colored The single fiber fineness of the polypropylene fiber is between 0.04 denier and 0.2 denier.

According to the present invention, by using a compatible polypropylene material and a soluble polymer material as a spinning raw material, the melt of the materials can be co-spun to form an island-in-the-sea colored composite filament through an island-in-the-sea composite spinning method; Accordingly, the colored polypropylene fabric woven from the polypropylene composite yarn can be obtained by a suitable melt-cleaving treatment to obtain a colored artificial leather fabric having ultrafine fibers. Accordingly, the method for producing the colored artificial leather fabric can smoothly produce the colored artificial leather fabric containing the colored polypropylene microfiber without using the metallocene catalyst or the high-pressure water jet of energy consumption, so that the colored artificial fabric can be made. Leather fabrics have properties such as peach skin, suede fabric or alpaca fabric. In addition, since the colored artificial leather fabric of the present invention is prepared by mixing the polypropylene material with the first color masterbatch before the spinning process, the masterbatch can be uniformly mixed into the interior and the surface of the polypropylene composite yarn. Improve the color fastness of colored artificial leather fabrics.

Specifically, the first sea-island type colored composite filament is obtained by the method as follows: mixing a polypropylene material and a plurality of first masterbatch to obtain a first colored polypropylene material; a colored polypropylene material and a soluble polymer material for melting to form a first colored polypropylene melt and a soluble polymer melt; and co-spinning the first colored polymer by an island-in-the-sea composite spinning method a propylene melt and the soluble polymer melt to form a first sea-island type colored composite filament, the first sea-island type colored composite filament comprising a plurality of first colored polypropylene fibers and a soluble outer layer of polymer The outer layer of the soluble polymer is coated around the first colored polypropylene fibers. The modified polyester is used to increase the amount of sodium sulfonate and a third monomer (for example, isophthalic acid, bishydroxyethyl isophthalate, polyethylene glycol monomer) in a cationic dyeable granule process. The modified polyester has the property of being easily hydrolyzed by increasing the content of the hydrophilic group in the modified polyester and lowering the crystallinity of the modified polyester. Here, the soluble polymer melt and the first colored polypropylene melt may be co-spun to form a first sea-island type colored composite filament by sea-island composite spinning; after being twisted, the obtained product is obtained. The first polypropylene composite yarn also contains a soluble polymer. According to this, the colored polypropylene fabric is treated by using a solvent to dissolve the polymerizable outer layer of the first polypropylene composite yarn in the colored polypropylene fabric, and the outer layer of the polymer is dissolved by the solvent to dissolve the fiber to make the colored artificial leather. The first colored polypropylene fiber of the fabric has a single fiber fineness of between 0.04 denier and 0.2 denier, that is, the first colored polypropylene fiber has a single fiber diameter of between 2.57 micrometers and 5.58 micrometers.

Preferably, the solvent to be dissolved may be an aqueous sodium hydroxide solution, phenol, tetrachloroethane, m-cresol or nitrobenzene, but is not limited thereto. Preferably, the step of dissolving the outer layer of the soluble polymer of each of the first polypropylene composite color yarns in the colored polypropylene fabric by using the solvent to remove comprises: placing the colored polypropylene fabric at a concentration of 5 g/L to 10 g/L, the temperature is between 90 ° C and 100 ° C in the solvent for up to 0.5 hours to obtain the colored artificial leather fabric. Here, by adjusting the concentration, temperature and time conditions of the polypropylene fabric immersed in the solvent to dissolve, the modified polyester fiber in the polypropylene fabric can be specifically removed, and the chemically treated colored artificial leather fabric can be refined. The fineness of each colored polypropylene fiber.

Another purpose of this creation is to make the peach-like fabric, the suede-like fabric and the alpaca-like fabric have more design sense, so that the peach-like fabric, the suede-like fabric or the alpaca-like fabric can simultaneously display a variety of different colors. .

In order to achieve the foregoing object, preferably, the foregoing method comprises: providing a second island-in-sea type colored composite filament, wherein the second island-type colored composite filament is obtained by the method as described above, and the second island-type colored composite is long The color of the silk is different from the color of the first island-type colored composite filament; and the twisted polyester high shrink yarn and the second island-type colored composite filament to obtain a second polypropylene composite yarn; The step of weaving the first polypropylene composite color yarn to form the colored polypropylene fabric comprises: weaving the first polypropylene composite color yarn and the second polypropylene composite color yarn to form the colored polypropylene fabric; The step of dissolving the soluble outer layer of each of the first polypropylene composite color yarns in the colored polypropylene fabric to obtain the colored artificial leather fabric comprises: dissolving each of the colored polypropylene fabrics using a solvent to dissolve The soluble outer layer of the polymer of the polypropylene composite yarn and the soluble outer layer of the second polypropylene composite yarn of the colored polypropylene fabric are obtained to obtain the colored artificial leather fabric.

Accordingly, the colored artificial leather fabric obtained by the above method comprises the first colored polypropylene fibers and the second colored polypropylene fibers, and the first colored polypropylene fibers have a single fiber fineness of 0.04 Dan. Between Nie and 0.2 Danny, the single-fiber fineness of the second colored polypropylene fibers is between 0.04 Danny and 0.2 Danny. Accordingly, the creation method of the present invention can obtain colored artificial leather fabrics exhibiting various colors and styling changes at the same time, such as artificial leather fabrics containing two colors, three colors, multiple colors or exhibiting shapes such as lattices, stripes or patterns, thereby further enhancing The design and variation of colored artificial leather fabrics.

Specifically, the second sea-island type colored composite filament is obtained by a method as follows: mixing a polypropylene material and a plurality of second masterbatch to obtain a second colored polypropylene material, the first The color of the two-color masterbatch is different from the color of the first masterbatch; heating a second colored polypropylene material and a soluble polymer material to melt to form a second colored polypropylene melt and one Dissolving the polymer melt; co-spinning the second colored polypropylene melt and the soluble polymer melt by an island-in-the-sea composite spinning method to form a second island-type colored composite filament, the second The island-type colored composite filament comprises a plurality of second colored polypropylene fibers and a soluble outer layer of polymer, and the outer layer of the soluble polymer is coated around the second colored polypropylene fibers.

Preferably, the first color masterbatch is used in an amount of from 4 to 10% by weight of the total first colored polypropylene material, and the first masterbatch has a particle diameter of from 250 nm to 450 nm; The second masterbatch is present in an amount from 4 to 10 weight percent of the total second colored polypropylene material, and the second masterbatch has a particle size of from 250 nanometers to 450 nanometers.

Preferably, the first masterbatch has a melting point of 150 ° C to 190 ° C, and the second masterbatch has a melting point of 150 ° C to 190 ° C.

Preferably, the first color masterbatch melt has a melt flow index of between 5 g/10 min and 40 g/10 min, and the second masterbatch melt has a melt flow index of 5 g. Between 10 minutes and 40 grams/10 minutes.

Preferably, the weight ratio of the first colored polypropylene material to the soluble polymer material is between 60:40 and 80:20, and the second colored polypropylene material is relative to the soluble polymer material. The weight ratio is between 60:40 and 80:20.

Preferably, the step of processing the sea-island type colored composite filament to obtain the polypropylene composite color yarn comprises: processing the sea-island type colored composite filament with a stretching ratio of 1.2 to 4.0, and obtaining an extended processing method. Island-type colored composite filaments; and a polyester high-shrinkage yarn (30d/12f or 60d/24f) and the extended-processed island-type colored composite filament yarn are subjected to false twisting processing to obtain the polypropylene composite color yarn. Alternatively, the step of twisting and processing the sea-island type colored composite filament to obtain the polypropylene composite color yarn comprises: twisting a polyester high-shrink yarn and the sea-island type colored composite filament to obtain the poly Acrylic composite yarn. According to this, after the dissolving step, the colored polypropylene fabric can be shrunk, so that the first colored polypropylene fiber in the island-type colored composite filament shrinks and slightly bulges, so that the colored artificial leather fabric can obtain the feeling of richness and softness. .

Preferably, the method comprises weaving the first polypropylene composite yarn and the second polypropylene composite yarn by knitting or weaving to form the colored polypropylene fabric.

In the present specification, "melting flow index (MFI)" refers to the weight of a material flowing out every 10 minutes at a temperature of 230 ° C and a load of 2.16 kg to quantify the flow of the material. Sexual representation in grams per 10 minutes (g/10 min).

As used herein, "intrinsic viscosity" means a material weighing 0.1250 ± 0.0003 g dissolved in 25 ml of a 1:1 solution of tetrachloroethane and phenol, poured into a glass and stirred at 97 to 100 ° C for 30 minutes. After standing and cooling, the obtained weight is V compared with the weight of the original test sample, and the intrinsic viscosity IV is obtained by substituting the following formula. IV={[(V-1)x1.4 +1]÷0.35} ^1/2

In summary, the method for producing the colored artificial leather fabric can not only simplify the prior art in the production of colored artificial leather fabrics such as peach-like fabrics, suede-like fabrics or alpaca-like fabrics. The process complexity can better solve the pollution problem caused by the prior art dyeing process, thereby providing a production method more suitable for mass production of colored artificial leather fabrics such as peach skin fabric, suede fabric or alpaca fabric.

Hereinafter, embodiments of the present invention will be described by way of specific embodiments, and those skilled in the art can easily understand the advantages and effects of the present invention through the contents of the present specification, and carry out various kinds of spirits without departing from the spirit of the present creation. Modifications and changes to implement or apply the content of this creation.

Raw materials: 1. Polypropylene material: purchased from Taiwan Chemical Fiber Co., Ltd., the product model is S2123; the polypropylene material has a melting point of 165.2 ° C, a crystallization point of 110.87 ° C, and the polypropylene material is in a molten state. The melt flow index is 25. 2. Red masterbatch: purchased from Taiwan Clariant Chemical Co., Ltd., the product model is RED3B-AP; the red masterbatch has a melting point of 161.69 ° C, a crystallization point of 123.7 ° C, and the red masterbatch is in a molten state. The melt flow index is 25 and the red masterbatch has a particle size of less than 250 nm. 3. Green masterbatch: purchased from Taiwan Clariant Chemical Co., Ltd., the product model is GREEN GG-APRC; the green masterbatch has a melting point of 163.93 ° C, a crystallization point of 122.40 ° C, and the green masterbatch is in a molten state. The melt flow index is 25 and the green masterbatch has a particle size of less than 250 nm. 4. Modified polyester material: purchased from Shin Kong Synthetic Fiber Co., Ltd., the product model is CO8540. The modified polyester material has a glass transition temperature of 67.19 ° C and a melting point of 232.67 ° C. The modified polyester material The intrinsic viscosity is 0.55.

Example 1

First, use a precision scale to weigh the right amount of polypropylene material and red masterbatch, and then use a mixer to evenly mix the two to obtain a colored polypropylene material. In the colored polypropylene material, the red masterbatch occupies 8 weight percent of the overall colored polypropylene material.

Next, using the two-component composite spinning machine 1 shown in FIG. 1, the foregoing colored polypropylene material and the modified polyester material are respectively obtained from a first screw spinning material barrel 101 and a second screw spinning material barrel 101A. Feeding the first screw 102 of the first screw extruder 10 and the second screw 12A of the second screw extruder 10A, the rotational speeds of the first screw 102 and the second screw 102A are set to 12.85 rpm and 3.50 rpm, respectively. The extrusion temperature of a screw 102 is set to 210 ° C, 220 ° C, 220 ° C, 225 ° C, and the extrusion temperature of the second screw 102A is set to 250 ° C, 255 ° C, 260 ° C, 265 ° C. The colored polypropylene material and the modified polyester material are separately melted to form a colored polypropylene melt and a modified polyester melt.

Thereafter, the colored polypropylene melt injected into the first flow path of the spinning box 20 and the modified polyester melt of the second flow path are respectively controlled by the first feed pump 103 and the second feed pump 103A. The weight ratio of the two is 70:30.

Next, the island-in-the-sea composite filaments were co-spun by the island-in-the-sea composite spinning method using a composite spinning nozzle. Specifically, the composite spinning nozzle is disposed under the first flow path and the second flow path. As shown in FIG. 2, the composite spinning nozzle 21 is sequentially arranged with a distribution plate 211, an island needle plate 212, and an island from top to bottom. An orifice plate 213 and a spinneret 214 having a plurality of first passages 2111 and a plurality of second passages 2112, the first passages 2111 communicating with the first flow passages, the second passages 2112 and the second The island needle plate 212 is provided with a plurality of island area distribution holes 2121 and a plurality of sea area distribution holes 2122. The island area distribution holes 2121 are in communication with the first channel 2111, and the sea area distribution holes 2122 of the island needle plate 212 A distribution hole 2121 is disposed around the island area, and the sea area distribution hole 2122 of the island needle plate 212 is in communication with the second channel 2112; the island hole plate 213 is provided with a plurality of connection distribution holes 2131, and the connection distribution hole 2131 is connected to the island. The island area distribution hole 2121 of the needle plate 212 and the sea area distribution hole 2122 are in communication; and the spinneret plate 214 is in communication with the connection distribution hole 2131 of the island hole plate 213.

In the island-in-the-sea composite spinning process, the colored polypropylene melt flowing through the first flow path is branched to the plurality of first passages 2111 of the distribution plate 211, and the modified polyester melt flowing through the second flow passage is branched to The plurality of second channels 2112 of the distribution plate 211 are disposed. After the colored polypropylene melt and the modified polyester melt flow through the upper distribution plate 211, as shown in FIG. 2, the colored polypropylene melt flows through the island distribution hole 2121 of the island needle plate 212 and the island orifice plate 213 is connected. After the distribution hole 2131 is distributed, the island 37 is formed and flows into the spinneret 214: the modified polyester melt enters the sea area distribution hole 2122 of the island needle plate 212, and then the island formed by the colored polypropylene melt is flowed through the island orifice plate. The connection distribution hole 2131 of 213 enters the spinneret 214. Here, the 24 spun openings 2141 of the spinneret 214 were respectively blended into 24 island-type colored composite filaments including 37 islands, and the diameter of each spun 2141 was 0.28 mm.

After the sea-island composite filament is cooled by a cooling air of 16 ° C to 21 ° C, the heat-treated colored polypropylene melt and the heat-treated product are continuously changed at a spinning speed of 2200 m/min. The polyester melt is co-spun to form a sea-island type colored composite filament of 888 islands, and the island-type colored composite filament comprises colored polypropylene fibers and modified polyester fibers. Among them, each island-type colored composite filament comprises colored polypropylene fiber and modified polyester fiber; as shown in Fig. 3, the modified polyester fiber (sea zone fiber) is coated with 24 colored polypropylene fibers (island fiber) ), forming an island-type cross-sectional structure.

Then, the cooled island-in-the-sea colored composite filaments are sequentially wound around a first roller 31 having a rotational speed of 700 m/min, a rotational speed of 1300 m/min, and a second temperature of 70 °C. The roller 32 and the third roller 33 having a rotational speed of 2,200 m/min and a setting temperature of 140 ° C were used to extend the island-type colored composite filament to obtain an island-in-the-sea colored composite filament. Here, the stretching ratio by the difference in rotation speed between the first roller 31 and the second roller 32 is 1.86, and the stretching ratio by the difference in rotation speed between the second roller 32 and the third roller 33 is 1.69. After the extension processing, the shaped island-type colored composite filaments were collected on the take-up shaft 40 at a take-up speed of 2,220 m/min.

Thereafter, the sea-island type colored composite filament and the 60d/24f high-shrinkage polyester yarn are gas-treated at a pressure of 0.6 kg/cm ^{2 to} form an island-in-the-sea composite yarn, the island-in-the-sea composite yarn. In red. The cross-sectional structure of the sea-island type colored composite filament is as shown in FIG. Next, a colored polypropylene fabric was woven by the woven method using the above-mentioned sea-island composite color yarn, and the surface morphology thereof was observed by an electron microscope as shown in FIG.

Next, the colored polypropylene fabric was placed in a sodium hydroxide aqueous solution having a concentration of 9 g/L at a temperature of 95 ° C for 30 minutes to dissolve the modified polyester to obtain a chemically treated colored polypropylene fabric. The colored artificial leather fabric can be obtained by subjecting the surface of the chemically treated colored polypropylene fabric to a surface by using a grinding roller having a fine sandpaper of 1000.

Here, as shown in FIG. 6, after the chemical dissolution and the sanding process, the sea-island composite color yarn in the colored artificial leather fabric is cracked into short and fine colored polypropylene fibers, and the distribution is scattered. The type.

It is confirmed whether the modified polyester modified polyester component has been completely dissolved by the aqueous sodium hydroxide solution, compared with the amount of the modified polyester before and after the dissolution of the colored polypropylene fabric by the aqueous sodium hydroxide solution. The experimental results show that the artificial leather fabric (like suede fabric) which is dissolved by the sodium hydroxide aqueous solution has a reduced weight of 3005 g compared with the colored polypropylene fabric before the sodium hydroxide aqueous solution is dissolved, and this embodiment The modified polyester used was used in an amount of 3000 g. It can be seen that the modified polyester has been completely dissolved by the aqueous sodium hydroxide solution.

In this experiment, CNS13785 L3245-1996 synthetic filament fiber processing yarn test method is used to measure the colored artificial leather fabric. The total Dannis number of the island-in-the-sea composite yarn is 80D, and the fineness of single polypropylene fiber. 0.04D, the single polypropylene fiber has a wire diameter of 2.57 microns; the modified polyester fiber has a fineness of 0.018D; in addition, the CNS13785 L3245-1996 synthetic filament fiber processed yarn test method is used to measure the sample. The stretch of colored artificial leather fabric is 31.67%, and the number of islands is 37 islands. Physical properties meet the needs of fabric weaving.

Accordingly, the present embodiment can not only maintain the properties of the original polypropylene fiber, such as heat preservation, low water absorption, acid and alkali resistance, but also can utilize the island-in-the-sea composite spinning and the dissolution and fission technology to obtain ultrafine fibers. The artificial leather fabric is such that the artificial leather fabric obtained has a soft hand feeling such as a peach skin or a suede fabric, and can be used as a peach-like fabric or a suede fabric.

Example 2

In this embodiment, a sea-island-type composite color yarn in a red color is obtained by the method described in the foregoing Embodiment 1, and the island-in-the-sea composite color yarn is a first sea-island type composite color yarn.

On the other hand, in this embodiment, a suitable amount of the polypropylene material and the green master batch are uniformly mixed by using a mixer to obtain a second colored polypropylene material. In the second color polypropylene material, the green masterbatch accounts for 4.2% by weight of the entire second colored polypropylene material.

Then, after repeating the sea-island type composite spinning process, cooling, extension, and gas-jet processing described in Embodiment 1, a second sea-island type composite color yarn is obtained, and the sea-island type composite color yarn is green. The sea-island composite yarn has a total Danny number of 80D, a single polypropylene fiber has a fineness of 0.04D, a single polypropylene fiber has a wire diameter of 2.57 microns, and the modified polyester fiber has a fineness of 0.018D; The colored artificial leather fabric obtained by the method of measuring the filamentary fiber processing yarn of CNS13785 L3245-1996 was measured by the test method, and the elongation of the colored artificial leather fabric was 30.52%, and the number of islands was 37 islands.

Then, the first sea-island type composite color yarn and the second sea-island type composite color yarn are woven by a weaving method to form a two-color polypropylene fabric; and then processed by the dissolving and sanding process as described in the foregoing embodiment 1. A two-tone faux leather fabric.

Example 3

In this embodiment, a two-component composite spinning machine as described in the foregoing embodiment 1 is used to prepare a red island-in-the-sea composite yarn; the difference is that the two-component composite spinning machine used in the embodiment In the composite spinning nozzle, the spinneret has 36 spun yarns, that is to say, in this embodiment, 36 spun yarns of the spinneret are respectively blended into 36 island-type colored composite filaments including 37 islands. The diameter of each of the spouts 2141 is 0.28 mm.

After the sea-island composite filament is cooled by a cooling air of 16 ° C to 21 ° C, the heat-treated colored polypropylene melt and the heat-treated product are continuously changed at a spinning speed of 2200 m/min. The polyester melt is co-spun to form a sea-island type colored composite filament of a total of 1332 islands, and the island-type colored composite filaments comprise colored polypropylene fibers and modified polyester fibers.

Then, the steps as described in the foregoing Embodiment 1 are repeated, and the sea-island type colored composite filaments are sequentially cooled and stretched, and then the sea-island type colored composite filaments and the 30d/12f high-shrinkage polyester yarn are used. The air with a pressure of 0.6 kg/cm ² is gas-processed to form an island-in-the-sea composite yarn; after obtaining the colored polypropylene fabric by the steps of weaving, the colored polypropylene fabric is chemically dissolved and sanded, and borrowed. This makes the island-in-the-sea composite yarn in the colored artificial leather fabric split into a colored polypropylene fiber having a single-fiber fineness of 0.04 denier.

Accordingly, the present embodiment can be pre-formed into various sea-island composite color yarns exhibiting different colors according to different design requirements, and then woven into a multi-color artificial leather fabric having multiple color variations or shapes through appropriate knitting methods. For example, the multi-color artificial leather fabric can be designed to contain more than two colors according to different needs, and presents a variety of artificial leather fabrics such as plaids, stripes or patterns. Therefore, compared with the prior art manufacturing method, the method of producing the colored artificial leather fabric can be applied to the production of multi-color artificial leather fabric, thereby enhancing the design sense.

The above-described embodiments are merely examples for convenience of description, and the scope of the claims is intended to be limited to the above embodiments.

1‧‧‧Two-component composite spinning machine

10‧‧‧First screw extruder

10A‧‧‧Second screw extruder

101‧‧‧First screw spinning material barrel

101A‧‧‧Second screw spinning material barrel

102‧‧‧First screw

102A‧‧‧Second screw

103‧‧‧First feed pump

103A‧‧‧Second feed pump

20‧‧‧ Spinning box

21‧‧‧Composite Spinning Mouth

211‧‧‧Distribution board

2111‧‧‧ first channel

2112‧‧‧second channel

212‧‧‧ Island Needle Board

2121‧‧‧ Island area distribution hole

2122‧‧‧Sea area distribution hole

213‧‧‧ island plate

2131‧‧‧ Connection distribution hole

214‧‧‧spinning plate

Figure 1 is a schematic view of a two-component composite spinning machine. 2 is a cross-sectional view of a distribution plate, an island needle plate, an island orifice plate, and a spinneret in a composite spinning nozzle. Fig. 3 is a cross-sectional image view of an island-type colored composite filament. Fig. 4 is an electron microscope image of an island-type colored composite filament. Figure 5 is an electron microscope image of a colored polypropylene fabric. Figure 6 is an electron micrograph of a colored polypropylene fiber in a colored artificial leather fabric.

no.

Claims (12)

The invention relates to a method for preparing an island-type colored composite filament, which comprises: mixing a polypropylene material and a plurality of color masterbatch to obtain a colored polypropylene material, wherein the color masterbatch has a melting point of 150 ° C to 190 ° C; heating the colored The polypropylene material and a soluble polymer material are respectively melted to form a colored polypropylene melt and a soluble polymer melt, wherein the soluble polymer material has a melting point of 165 ° C to 240 ° C; Coiling the colored polypropylene melt and the soluble polymer melt by an island-in-the-sea composite spinning method to form an island-in-the-sea colored composite filament comprising a plurality of colored polypropylene fibers and a The outer layer of the polymer is soluble, and the outer layer of the soluble polymer is coated around the colored polypropylene fibers. The method of preparing the sea-island type colored composite filament according to claim 1, wherein the amount of the masterbatch is 4 to 10% by weight of the whole of the colored polypropylene material, and the particle size of the masterbatch is 250 nm to 450 nm. The method of preparing a sea-island type colored composite filament according to claim 1, wherein the colored polypropylene melt comprises a polypropylene melt and a plurality of color masterbatch melts, and the polypropylene melt has a melt flow index of 10 g. Between 10/10 and 40 g/10 minutes, the melt flow index of the masterbatch melt is between 5 g/10 min and 40 g/10 min, which dissolves the intrinsic viscosity of the polymer melt. It is between 0.45 dL/g and 0.65 dL/g. The method of claim 1, wherein the weight ratio of the colored polypropylene material to the soluble polymer material is between 60:40 and 80:20. The method for preparing a sea-island type colored composite filament according to claim 1, wherein the soluble polymer material is a modified polyester material, and the soluble polymer melting system is a modified polyester melt. The intrinsic viscosity of the modified polyester melt is between 0.45 dL/g and 0.65 dL/g. The method for producing a sea-island type colored composite filament according to any one of claims 1 to 5, which comprises heating the colored polypropylene material to between 210 ° C and 240 ° C to melt to form the colored polypropylene melt, And heating the soluble polymer material to between 240 ° C and 270 ° C to melt to form the soluble polymer melt. The method for producing a sea-island type colored composite filament according to any one of claims 1 to 5, wherein the colored polypropylene melt and the soluble polymer melt are co-spun by an island-in-the-sea composite spinning method to form The step of the sea-island colored composite filament comprises: flowing the colored polypropylene melt and the soluble polymer melt through a composite spinning nozzle, and the diameter of the spinning spout of the composite spinning nozzle is 0.15 mm to 0.40 mm And co-spinning the colored polypropylene melt and the soluble polymer melt at a spinning speed of 2000 to 2800 meters/minute to form the sea-island type colored composite filament, the island-type colored composite long The filaments comprise from 24 to 72 colored polypropylene fibers, each having a fineness of from 0.04 denier to 0.2 denier. A method of producing a colored artificial leather fabric, comprising: providing a first sea-island type colored composite filament obtained by the method according to any one of claims 1 to 7. And twisting a polyester high-shrink yarn and the first island-type colored composite filament to obtain a first polypropylene composite color yarn; weaving the first polypropylene composite color yarn to form a colored polypropylene fabric; Dissolving the soluble outer layer of the first polypropylene composite color yarn in the colored polypropylene fabric to obtain the colored artificial leather fabric, wherein the colored artificial leather fabric comprises the first island-type colored The plurality of first colored polypropylene fibers in the composite filaments, the first colored polypropylene fibers having a single fiber fineness of between 0.04 denier and 0.2 denier. The method of preparing a colored artificial leather fabric according to claim 8, wherein the step of adding the polyester high-shrink yarn to the first sea-island type colored composite filament to obtain the first polypropylene composite color yarn comprises: 1.2 Extending the first sea-island type colored composite filament to a stretching ratio of 4.0 to obtain an extended sea-island-type colored composite filament; and the polyester high-shrink yarn and the stretched first island-type colored The composite filaments are subjected to false twisting to obtain the first polypropylene composite yarn. The method of preparing a colored artificial leather fabric according to claim 8, wherein the solvent is an aqueous solution of sodium hydroxide, phenol, tetrachloroethane, m-cresol or nitrobenzene. The method for producing a colored artificial leather fabric according to any one of claims 8 to 10, wherein the method further comprises: providing a second island-in-sea type colored composite filament, the second island-type colored composite filament is requested by The method according to any one of items 1 to 7, wherein the color of the second island-type colored composite filament is different from the color of the first island-type colored composite filament; And the second island-type colored composite filament to obtain a second polypropylene composite color yarn; the step of weaving the first polypropylene composite color yarn to form the colored polypropylene fabric comprises: weaving the first polypropylene a composite color yarn and the second polypropylene composite color yarn to form the colored polypropylene fabric; and the solvent is used to dissolve the soluble polymer outer layer of each of the first polypropylene composite color yarns in the colored polypropylene fabric The step of obtaining the colored artificial leather fabric comprises: dissolving the soluble polymer outer layer of each first polypropylene composite color yarn in the colored polypropylene fabric and the second polypropylene composite in the colored polypropylene fabric using a solvent to dissolve the solvent; Color yarn In addition to the soluble polymer layer, to obtain the colored artificial leather fabrics; Wherein the colored artificial leather fabric comprises the first colored polypropylene fibers and the plurality of second colored polypropylene fibers in the second island-type colored composite filament, and the second colored polypropylene fibers have a single fiber fineness of 0.04 Danny is between 0.2 and Danny. The method of preparing a colored artificial leather fabric according to claim 11, wherein the method comprises weaving the first polypropylene composite color yarn and the second polypropylene composite color yarn by knitting or weaving to form the colored poly Acrylic fabric.