CN112941924A - Anti-pilling polyester cotton knitted fabric and preparation method thereof - Google Patents
Anti-pilling polyester cotton knitted fabric and preparation method thereof Download PDFInfo
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- CN112941924A CN112941924A CN202110096915.7A CN202110096915A CN112941924A CN 112941924 A CN112941924 A CN 112941924A CN 202110096915 A CN202110096915 A CN 202110096915A CN 112941924 A CN112941924 A CN 112941924A
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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
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
- D06N3/142—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes mixture of polyurethanes with other resins in the same layer
- D06N3/144—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes mixture of polyurethanes with other resins in the same layer with polyurethane and polymerisation products, e.g. acrylics, PVC
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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
- D01D11/00—Other features of manufacture
- D01D11/06—Coating with spinning solutions or melts
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- 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
- D06N3/0009—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 knitted fabrics
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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
- D06N3/0015—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 fibres of specified chemical or physical nature, e.g. natural silk
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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
- D06N3/0015—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 fibres of specified chemical or physical nature, e.g. natural silk
- D06N3/0036—Polyester fibres
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- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
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- D10B2401/021—Moisture-responsive characteristics hydrophobic
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Abstract
The application relates to the field of textiles, in particular to a fluffing and pilling resistant polyester cotton knitted fabric and a preparation method thereof. The anti-pilling polyester cotton knitted fabric is formed by blending polyester yarn coated yarns and cotton threads, and is characterized in that the polyester yarn coated yarns are prepared according to the following steps: s201, drying the low-melting-point polyester chip to obtain a dried chip with the water content less than or equal to 5%; and S202, taking the polyester yarn as a core layer, melting and extruding the dried slices, coating the polyester yarn with the slices to form a coating layer, and cooling to obtain the polyester yarn coated yarn. The anti-pilling polyester cotton knitted fabric prepared by the method has excellent anti-pilling performance.
Description
Technical Field
The application relates to the field of textiles, in particular to a fluffing and pilling resistant polyester cotton knitted fabric and a preparation method thereof.
Background
The polyester cotton knitted fabric is a knitted fabric formed by blending polyester yarns and cotton threads according to a certain proportion, and has a loose structure, soft hand feeling and high air permeability.
Because the surface of the polyester is smooth and the cohesive force between the polyester and the cotton fiber is poor, when the polyester-cotton fabric is processed and used and is under the action of mechanical external force and friction force, the cotton fiber is easy to fall off from a fiber bundle or is broken, so that the end part of the fiber is exposed and fluff is generated on the surface of the fabric, and the breaking strength of the polyester fiber is high, so that the fluff cannot fall off from the surface of the fabric in time and is entangled to form a hair bulb, thereby affecting the appearance quality and the wearing quality of the fabric.
Content of application
In order to solve the problem that the polyester-cotton knitted fabric is easy to fluff and pill, the application provides the anti-fluff and pill polyester-cotton knitted fabric and the preparation method thereof, and the prepared polyester-cotton knitted fabric has excellent anti-fluff and pill performance.
First aspect, the application provides an anti-pilling polyester cotton knitted fabric, adopts following technical scheme:
the anti-pilling polyester cotton knitted fabric is formed by blending polyester yarn coated yarns and cotton threads, and is characterized in that the polyester yarn coated yarns are prepared according to the following steps:
s201, drying the low-melting-point polyester chip to obtain a dried chip with the water content less than or equal to 5%;
and S202, taking the polyester yarn as a core layer, melting and extruding the dried slices, coating the polyester yarn with the slices to form a coating layer, and cooling to obtain the polyester yarn coated yarn.
This application uses conventional dacron silk as the sandwich layer, adopts low melting point polyester as the coating raw materials, with its melting cladding in dacron silk surface, low melting point polyester has higher compatibility with the dacron silk, can make skin-core composite structure's dacron silk. Because the crystallinity of the low-melting-point polyester is low, the viscosity is low, the breaking strength is low, the fluff on the surface of the polyester yarn-coated yarn can fall off in time, and the hair bulb is not easy to form, so that the anti-pilling performance of the fabric is improved.
Preferably, the low-melting polyester chip has a melting point of 130 ℃ to 170 ℃.
The melting point of the polyester yarn prepared from the conventional polyester is 255-260 ℃, and the polyester with the melting point range is adopted, so that the polyester yarn is conveniently coated on the surface of the polyester yarn, and the polyester yarn is not melted to influence the mechanical property of the polyester yarn; on the other hand, the temperature can enable the polyester yarns of the core layer and the polyester of the coating layer to be mutually adhered, so that the connection strength is improved, and the washing resistance of the polyester-cotton knitted fabric is improved. In addition, the melting point is too low, the wear resistance is too poor, and the service life is not prolonged.
Preferably, the intrinsic viscosity of the low-melting polyester chip is less than 0.6 dL/g.
The polyester viscosity is reduced, the breaking strength of the coating layer can be properly reduced, and the falling of surface layer fluff is facilitated, so that the fuzzing and pilling resistance of the fabric is improved.
Preferably, in step S102, the screw length-diameter ratio of an extruder used for melt extrusion of the low-melting-point polyester chip is 22 to 26.
By adopting the length-diameter ratio of the screw, the surface of the prepared coating layer is rough, and the coating layer is favorable for improving the cohesive force with cotton threads, thereby reducing the exposure and the breakage of cotton fibers, reducing the generation of fluff and improving the fuzzing and pilling resistance of the polyester cotton knitted fabric.
Preferably, the anti-pilling polyester-cotton knitted fabric is obtained by finishing an acrylate-waterborne polyurethane composite emulsion, wherein the acrylate-waterborne polyurethane composite emulsion is prepared from the following raw materials in parts by weight:
dimethylolpropionic acid: 5-8 parts;
polyethylene glycol-2000: 25-35 parts;
toluene diisocyanate: 25-35 parts;
acrylate ester monomer: 30-45 parts of a solvent;
sodium dodecylbenzenesulfonate: 3-5 parts;
ethylene diamine: 1-3 parts;
1, 4-butanediol: 1-3 parts;
triethylamine: 3-5 parts;
n-methylpyrrolidone: 5-10 parts;
acetone: 5-20 parts.
According to the polyester yarn and cotton yarn blended yarn finishing process, the acrylate-waterborne polyurethane composite emulsion is finished on the fabric, so that the emulsion is crosslinked on the fiber surface of the fabric to form a resin film with a net structure, the resin film can adhere the tail ends of polyester yarns and cotton yarns to the polyester-cotton blended yarn, the content of fluff is reduced, and the fuzzing and pilling resistance of the fabric is improved.
In addition, the resin film can reduce the sliding friction among the fibers, has good wear resistance, and is not easy to break the fibers to form fluff when the fabric is subjected to the friction force, so that the fuzzing and pilling resistance of the polyester knitted fabric is improved.
Preferably, the acrylate-waterborne polyurethane composite emulsion is prepared by the following method:
s101, fully mixing toluene diisocyanate and polyethylene glycol-2000, heating to 70-80 ℃, reacting for 1-2 hours in a heat preservation manner, adding a proper amount of acetone, and cooling to 65-70 ℃ to prepare a first premix;
s102, dripping 1, 4-butanediol, dimethylolpropionic acid and N-methyl pyrrolidone into the first premix, and reacting for 2-3h under heat preservation to prepare prepolymer emulsion;
s103, heating the prepolymer emulsion to 70-75 ℃, adding sodium dodecyl benzene sulfonate and an acrylate monomer, uniformly mixing, and cooling to 38-45 ℃ to obtain a second premix;
s104, stirring and mixing the first premix and a triethylamine aqueous solution uniformly under the condition of high-speed stirring, adding a proper amount of ethylenediamine, and continuously stirring uniformly to obtain a composite emulsion;
and S105, heating the composite emulsion to 70-80 ℃, dropwise adding an acetone solution of azodiisobutyronitrile, reacting for 1-2 hours while keeping the temperature after dropwise adding, standing, filtering, and removing the solvent by reduced pressure distillation to obtain the acrylic ester-waterborne polyurethane composite emulsion.
Toluene diisocyanate is used as a hard segment, polyethylene glycol is used as a soft segment, and dimethylolpropionic acid is used as a hydrophilic chain extender, and the aqueous polyurethane emulsion is obtained through polymerization. Then, using acrylic ester as a modified monomer, using 1, 4-butanediol as a polyol chain extender, using ethylenediamine as a polyamine chain extender, and modifying the waterborne polyurethane, and polymerizing to obtain the acrylic ester-waterborne polyurethane composite emulsion with the core-shell type interpenetrating network structure, wherein the composite emulsion can be crosslinked into a reticular film on the fiber surface, so that the anti-pilling performance of the polyester-cotton knitted fabric is improved.
Preferably, the raw materials of the acrylate-waterborne polyurethane composite emulsion further comprise 5-10 parts of epoxy resin, and the epoxy resin is dripped in the step S102.
The epoxy resin can be subjected to ring opening under the catalytic action of triethylamine, so that ether bonds are formed among epoxy compounds to be crosslinked, and the crosslinking density of the resin film is increased, so that the hardness and compactness of the resin film are improved, fluff generated by friction is reduced, and the water resistance is improved. When the content of the hydroxyl is too large, residual hydroxyl is generated, the hydrophilicity of the resin film is increased, and the water resistance of the polyester-cotton knitted fabric is reduced.
In a second aspect, the application provides a preparation method of an anti-pilling polyester-cotton knitted fabric, which adopts the following technical scheme:
a preparation method of a polyester cotton knitted fabric with pilling resistance comprises the following steps:
s301, blending polyester coated yarns and cotton threads to obtain polyester-cotton knitted fabric, and soaking the polyester-cotton knitted fabric in an anti-pilling finishing agent at a bath ratio of 1: 10-1: 15 for 30-60 min to obtain a soaked fabric;
s302, taking out the impregnated fabric and rolling, wherein the pressure between rollers of a padder is 0.1-0.2 MPa, and the rolling residual rate of the impregnated fabric after rolling is 85-90%, so as to obtain a rolled fabric;
s303, drying the prepared rolled fabric at the temperature of 60-90 ℃ for 5-10 min to obtain a dried fabric with the water content of less than 0.5%;
s304, baking and shaping the dried fabric at the temperature of 110-130 ℃ for 2-4 min to obtain the anti-pilling polyester cotton knitted fabric.
By adopting the technical scheme, the acrylic ester-waterborne polyurethane composite emulsion is arranged on the fabric, so that the emulsion is crosslinked on the fiber surface of the fabric to form a resin film with a net structure, the resin film can adhere the ends of the polyester yarns and the cotton yarns to the polyester-cotton blended yarns, and the generation of fluff is reduced. After the high-temperature treatment in the steps S303 and S304, the breaking strength of the coating layer on the surface of the polyester yarn coated yarn is reduced, which is beneficial to improving the anti-pilling performance of the polyester yarn coated yarn.
Preferably, before the dipping treatment in step S301, the polyester-cotton knitted fabric is preheated at 90-120 ℃ for 3-5 min and then cooled to room temperature.
By adopting the technical scheme, before the acrylic ester-waterborne polyurethane composite emulsion is adopted for finishing, the polyester cotton knitted fabric is subjected to pre-drying treatment, so that the coating layer on the surface of the polyester yarn coated yarn is softened and can be adhered with cotton threads, the cohesive force between the polyester yarn coated yarn and the cotton threads is favorably improved, and the fuzzing and pilling resistance of the fabric is further enhanced.
In summary, the present application has the following beneficial effects:
1. adopt low melting point polyester to carry out the cladding to the dacron silk in this application, make and make the fine hair that makes dacron silk cladding silk surface drop easily to the anti-pilling performance of polyester cotton knitted fabric has been improved.
2. The polyester cotton knitted fabric is further subjected to after-finishing by adopting the acrylate-waterborne polyurethane composite emulsion, so that the fuzzing and pilling resistance of the fabric is effectively improved.
3. According to the polyester-cotton knitted fabric, the epoxy resin is added in the polymerization process of the aqueous polyurethane emulsion, so that the water resistance of the emulsion after film formation is improved, and the water resistance of the polyester-cotton knitted fabric is improved.
Detailed Description
The present application will be described in further detail with reference to examples.
The following polyester yarns were all polyester FDY filaments available from Nantongke Jia textile fiber products, Inc., and the fineness was 600D.
Preparation example
Preparation example 1, a polyester yarn-covered yarn was prepared as follows:
s201, drying the low-melting-point polyester chip at 70 ℃ to obtain a dried chip with the water content of 4 +/-1;
s202, taking the polyester yarn as a core layer, melting and extruding the dried slices through an extruder with a screw rod length-diameter ratio of 24, coating the polyester yarn surface to form a coating layer with the thickness of 0.1mm, and cooling the polyester yarn to room temperature (23 ℃) by adopting a water cooling mode to obtain the polyester yarn coated yarn.
Wherein the low melting point polyester chip obtained in step S201 is purchased from Ningbo City town Haohui clothing science and technology Co., Ltd, and has a melting point of 160 ℃ and an intrinsic viscosity of 0.56 dL/g.
Preparation example 2, a polyester yarn-covered yarn, was different from preparation example 1 in that a low-melting polyester chip having a melting point of 130 ℃ was used in step S201.
Preparation example 3, a polyester yarn-covered yarn, was different from preparation example 1 in that a low-melting polyester chip having a melting point of 170 ℃ was used in step S201.
Preparation example 4, a polyester yarn-covered yarn, was different from preparation example 1 in that a low-melting polyester chip having a melting point of 110 ℃ was used in step S201.
Preparation example 5, a polyester yarn-covered yarn, was different from preparation example 1 in that a low-melting polyester chip having a melting point of 200 ℃ was used in step S201.
Production example 6, a polyester yarn-covered yarn, was different from production example 1 in that the screw length-diameter ratio of the extruder in step S202 was 22.
Production example 7, a polyester yarn-covered yarn, was different from production example 1 in that the screw length-diameter ratio of the extruder in step S202 was 26.
Preparation example 8, a polyester yarn-covered yarn, was different from preparation example 1 in that the low melting point polyester chip in step S201 was purchased from china petrochemical shanghai chemical corporation, having a melting point of 160 ℃ and an intrinsic viscosity of 0.67 dL/g.
Preparation example 9, raw materials and their corresponding contents of an acrylate-aqueous polyurethane composite emulsion are shown in table 1, and the acrylate-aqueous polyurethane composite emulsion is prepared according to the following steps:
s101, fully mixing toluene diisocyanate and polyethylene glycol-2000, heating to 72 ℃, keeping the temperature for reaction for 1h, adding 60% acetone, and cooling to 65 ℃ to obtain a first premix;
s102, dripping 1, 4-butanediol, dimethylolpropionic acid, epoxy resin and N-methylpyrrolidone into the first premix, and reacting for 2 hours under heat preservation to prepare prepolymer emulsion;
s103, heating the prepolymer emulsion to 75 ℃, adding sodium dodecyl benzene sulfonate and an acrylate monomer, uniformly mixing, and cooling to 40 ℃ to obtain a second premix;
s104, stirring and mixing the first premix and a triethylamine aqueous solution uniformly under the condition of high-speed stirring, adding a proper amount of ethylenediamine, and continuously stirring uniformly to obtain a composite emulsion;
and S105, heating the composite emulsion to 70-80 ℃, mixing the azobisisobutyronitrile with the rest acetone to obtain an acetone solution of the azobisisobutyronitrile, dropwise adding the acetone solution into the composite emulsion within 2 hours, reacting for 1 hour under the condition of heat preservation after dropwise adding is finished, standing, filtering, and distilling under reduced pressure to remove the acetone and the methyl pyrrolidone to obtain the acrylic ester-waterborne polyurethane composite emulsion.
Preparation examples 10 to 13, which are different from preparation example 1 in that the selection of each component and the corresponding content thereof are shown in table 1.
Table 1, preparation examples 9 to 13 raw material selection and corresponding content
Examples
Example 1, an anti-pilling polyester cotton knitted fabric is prepared according to the following method:
the polyester-cotton knitted fabric is obtained by blending the polyester yarn coated yarn prepared in the preparation example 1 and cotton thread according to the proportion of 70:30, the polyester-cotton knitted fabric is preheated for 5min at the temperature of 100 ℃, and then is naturally cooled to room temperature (23 ℃) to prepare the anti-pilling polyester-cotton knitted fabric.
Example 2, a pilling resistant polyester cotton knitted fabric, which is different from example 1 in that the pilling resistant polyester cotton knitted fabric adopted in step S301 is obtained by blending polyester yarn coated yarns prepared in preparation example 2 with cotton threads in a ratio of 70: 30.
Example 3, a polyester cotton knitted fabric resistant to pilling, which is different from example 1, is obtained by blending polyester yarn coated yarns prepared in preparation example 3 with cotton threads at a ratio of 70: 30.
Example 4, a polyester cotton knitted fabric resistant to pilling, which is different from example 1, is obtained by blending polyester yarn coated yarns prepared in preparation example 4 with cotton threads at a ratio of 70: 30.
Example 5, a polyester cotton knitted fabric resistant to pilling, which is different from example 1, is obtained by blending polyester yarn coated yarns prepared in preparation example 5 with cotton threads at a ratio of 70: 30.
Example 6, a pilling resistant polyester cotton knitted fabric, which is different from example 1 in that the polyester cotton knitted fabric used in step S301 is obtained by blending polyester yarn coated yarns prepared in preparation example 6 with cotton in a ratio of 70: 30.
Example 7, a pilling resistant polyester cotton knitted fabric, which is different from example 1 in that the polyester cotton knitted fabric used in step S301 is obtained by blending polyester yarn coated yarns prepared in preparation example 7 with cotton in a ratio of 70: 30.
Example 8, a pilling resistant polyester cotton knitted fabric, which is different from example 1 in that the polyester cotton knitted fabric used in step S301 is obtained by blending polyester yarn coated yarns prepared in preparation example 8 with cotton threads at a ratio of 70: 30.
Example 9, an anti-pilling polyester cotton knitted fabric was prepared as follows:
s301, preheating the polyester-cotton knitted fabric at 100 ℃ for 5min, and naturally cooling to room temperature; then soaking the polyester-cotton knitted fabric in the acrylic ester-waterborne polyurethane composite emulsion prepared in the preparation example 9 at a bath ratio of 1:10 for 45min to obtain a soaked fabric;
s302, taking out the impregnated fabric and rolling, wherein the pressure between rollers of a padder is 0.2MPa, and the rolling allowance of the impregnated fabric after rolling is 85 percent, so as to obtain a rolled fabric;
s303, drying the prepared rolled fabric at the temperature of 80 ℃ for 10min to obtain a dried fabric with the water content of less than 0.5%;
s304, baking the dried fabric at the temperature of 120 ℃ for 3min to obtain the anti-pilling polyester cotton knitted fabric.
The polyester-cotton knitted fabric in the step S301 is obtained by blending the polyester yarn coated yarn prepared in the preparation example 1 and cotton yarn according to the proportion of 70: 30.
Example 10, a pilling resistant polyester-cotton knitted fabric, which is different from example 1 in that the acrylate-aqueous polyurethane composite emulsion prepared in preparation example 10 is used in step S301 instead of the acrylate-aqueous polyurethane composite emulsion prepared in preparation example 8.
Example 11, a pilling resistant polyester-cotton knitted fabric, which is different from example 1 in that the acrylate-aqueous polyurethane composite emulsion prepared in preparation example 11 is used instead of the acrylate-aqueous polyurethane composite emulsion prepared in preparation example 8 in step S301.
Example 12, a pilling resistant polyester-cotton knitted fabric, which is different from example 1 in that the acrylate-aqueous polyurethane composite emulsion prepared in preparation example 12 is used instead of the acrylate-aqueous polyurethane composite emulsion prepared in preparation example 8 in step S301.
Example 13, a pilling resistant polyester-cotton knitted fabric, different from example 1, was obtained by replacing the acrylate-aqueous polyurethane composite emulsion obtained in preparation example 8 with the acrylate-aqueous polyurethane composite emulsion obtained in preparation example 13 in step S301.
Example 14, a pilling resistant polyester-cotton knitted fabric, which is different from example 1 in that the polyester-cotton knitted fabric is not preheated, and polyester yarn coated yarns and cotton threads are blended according to a ratio of 70:30 to obtain the polyester-cotton knitted fabric, namely the pilling resistant polyester-cotton knitted fabric.
Comparative example
Comparative example 1, a pilling resistant polyester cotton knitted fabric, which is different from example 1 in that polyester covered yarns are replaced with polyester yarns of the same fineness.
Comparative example 2, an anti-pilling polyester-cotton blended knitted fabric is formed by blending and weaving a first anti-pilling spherical material yarn and a second anti-pilling spherical material yarn, wherein the first anti-pilling spherical material yarn is formed by blending and weaving polyester fibers, apocynum venetum fibers and tencel fibers, the second anti-pilling spherical material yarn is formed by blending and weaving cotton fibers, pineapple leaf fibers and Vicat fibers, and the first anti-pilling spherical material yarn comprises the following components in percentage by weight: 54-64% of polyester fiber, 21-26% of apocynum venetum fiber and 15-20% of tencel fiber; the second anti-fuzzing spherical material yarn comprises the following components in percentage by weight: 53-63% of cotton fiber, 17-22% of pineapple leaf fiber and 20-25% of vicat fiber.
Performance test
Test 1: anti-pilling performance test of fabric
The test method comprises the following steps: reference GB/T4802.1-2008' test of pilling tendency of textile fabric surface
The test specimen was tested by the circular orbit method, part 1.
(1) Sample preparation: 5 circular samples (113. + -. 0.5) mm in diameter and 1 circular rating control sample (113. + -. 0.5) mm in diameter were cut out from the fabrics prepared in examples 1 to 14 and comparative examples 1 to 2. The samples were conditioned for 24 hours in a constant temperature and humidity chamber at a temperature of (20 + -2) ° C and a relative humidity of (65 + -4)%.
(2) Test parameters are as follows: 2201 full-wool gabardine is adopted as a fabric abrasive; the foam gasket has a square meter mass of about 270 g/square meter, a thickness of about 8mm and a sample gasket diameter of about 105 mm; the test pressure was 490cN, the number of fuzz was 30 and the number of pilling was 50.
(3) The test instrument: y502 type round track pilling fuzzing instrument
(4) Evaluation criteria: after the test is finished, the test sample is taken down, corresponding standard sample photographs are compared according to the size, the density and the form of spherulites on the test sample in a rating box, 5 evaluators are selected, the visual rating standard in the table 2 is referred to, the pilling grade of each test sample is rated, the rating grades of the 5 evaluators are recorded, the average value is obtained through calculation, and the test result is shown in the table 3.
TABLE 2 visual rating criteria
TABLE 3 anti-pilling performance test results of fabrics
And (3) analyzing test results:
(1) by combining the examples 1 to 8 and the comparative examples 1 to 2 and combining the table 3, it can be seen that the anti-pilling performance of the fabric can be effectively improved by using the coated polyester yarn prepared by coating the polyester yarn with the low-melting point polyester as the raw material and blending the coated polyester yarn with cotton thread to form the polyester-cotton knitted fabric. The reason for this is probably that the low-melting polyester has low crystallinity and poor breaking strength, so that the fluff on the polyester covered yarn is easy to break, is removed under the action of external force and is not easy to be entangled to form hair bulbs, and the anti-pilling performance of the polyester is improved.
(2) By combining examples 9-13 and comparative examples 1-2 and table 3, it can be seen that the anti-pilling performance of the fabric can be effectively improved by preparing the fabric from the polyester coated yarns and finishing the fabric with the acrylate-waterborne polyurethane composite emulsion. The reason for this may be that, as described above, the use of the polyester covered yarn makes the fluff on the surface of the polyester covered yarn easy to be removed during the rubbing process and difficult to be entangled into a ball. The acrylic ester-waterborne polyurethane composite emulsion can form a reticular resin film on the fiber surface of the fabric through crosslinking, and the tail end of the fiber is adhered and fixed, so that fluff cannot be formed; the resin film has good wear resistance, and can reduce fluff and hair balls generated by external force such as friction.
(3) By combining the examples 1 and 2 to 5 and combining the table 3, it can be seen that the low-melting-point polyester chips with the melting point of 130 ℃ to 170 ℃ are adopted, which is beneficial to improving the anti-pilling performance of the fabric. The reason may be that when the polyester with the low melting point is formed into the polyester coating layer, the crystallinity of the polyester is lower than that of the polyester with the conventional melting point (255-260 ℃), so that the breaking strength is low, and the fluff on the coating layer is easy to break and remove.
(4) By combining the embodiment 1 and the embodiments 6 to 7 and combining the table 3, the adoption of the extruder with the screw length-diameter ratio of 22 to 26 is beneficial to improving the anti-pilling performance of the fabric. The reason for this is probably that the coating layer made by the extruder with the lower long diameter ratio of the screw rod has a rough surface and a larger friction force, which is beneficial to improving the cohesive force with the cotton thread, further reducing the probability of fuzzing and pilling on the cotton thread, and finally improving the fuzzing and pilling resistance of the polyester-cotton knitted fabric.
(5) By combining the example 1 and the example 8 and combining the table 3, the polyester chip with the intrinsic viscosity less than 0.6L/g is beneficial to improving the fuzzing and pilling resistance of the fabric. The reason for this may be that the polyester has low viscosity, so that the fluff on the surface of the coating layer is easy to remove, thereby improving the fuzzing and pilling resistance of the fabric.
(6) By combining examples 9 to 11 and examples 12 to 13 and combining table 3, it can be seen that the adoption of the epoxy resin as the raw material monomer of the acrylate-aqueous polyurethane composite emulsion is beneficial to improving the fuzzing and pilling resistance of the fabric. The reason for this is probably that the epoxy resin is subjected to ring opening under the catalytic action of triethylamine in the reaction process, so that ether bonds are formed between epoxy compounds to crosslink, and the crosslinking density of the resin film is increased, thereby increasing the hardness and compactness of the resin film, further contributing to reduction of fluff generated by friction, and improving the water resistance.
(7) Combining example 1 with example 14 and combining table 3, it can be seen that the anti-pilling performance of the fabric can be improved by performing the preheating treatment on the polyester cotton knitted fabric. The reason for this may be that the polyester on the surface of the polyester covered yarn is softened by preheating at 90-120 ℃, so that the polyester yarn and the cotton fiber are adhered, the cohesion force between the polyester yarn and the cotton fiber is improved, the cotton fiber is prevented from dropping from the fabric, and the generation probability of fluff and fuzz balls is reduced.
Test 2: wear resistance test of fabric
The test method comprises the following steps: reference GB/T21196.2-2007 test of pilling tendency of textile fabric surface
The test specimen was tested by the circular orbit method, part 1.
(1) Sample preparation: 3 circular samples with a diameter of 3.5cm were cut from the fabrics prepared in examples 1 to 14 and comparative examples 1 to 2. And then placing the sample to be detected into a constant temperature and humidity laboratory, wherein the temperature is 20 ℃, the relative humidity is 65%, and the humidity is adjusted for 48 hours.
(2) Test parameters are as follows: the mass of the pressor was 395 g.
(3) The test instrument: YG401C model full-automatic fabric Martindale flat grinding machine.
(4) Evaluation criteria: in the test process, the number of times of friction when the friction surface of the sample showed signs of breakage (one yarn in the sample broken to cause a hole in appearance) was observed and recorded as the number of times of abrasion resistance, and the test results are shown in table 4.
Table 4 wear resistance test results of fabrics
| Wear resistance times/ten thousand times | Wear resistance times/ten thousand times | ||
| Example 1 | 3.6 | Example 9 | 4.1 |
| Example 2 | 3.1 | Example 10 | 4.3 |
| Example 3 | 3.9 | Example 11 | 4.1 |
| Example 4 | 2.7 | Example 12 | 3.9 |
| Example 5 | 4.3 | Example 13 | 3.6 |
| Example 6 | / | Example 14 | / |
| Example 7 | / | Comparative example 1 | 3.8 |
| Example 8 | 4.0 | Comparative example 2 | 4.0 |
(1) By combining the examples 1 and 2 to 5 and combining the table 4, it can be seen that the lower the melting point of the polyester used for the coating layer, the poorer the wear resistance of the prepared fabric. The reason for this is that the crystallinity of the polyester decreases at a low melting point, resulting in a decrease in mechanical properties and a decrease in abrasion resistance.
(2) By combining the examples 9 and 10 to 3 and combining the table 4, it can be seen that the wear resistance of the fabric can be improved by adopting the acrylate-waterborne polyurethane composite emulsion for finishing, and the wear resistance of the fabric can be further improved by adopting the epoxy resin. The reason for this may be that the acrylate-aqueous polyurethane composite emulsion is crosslinked into a resin film on the surface of the fiber, which has a certain hardness; and the addition of the epoxy resin can increase the cross-linked structure of the resin film, thereby enhancing the hardness of the resin film and further improving the wear resistance of the fabric.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. The anti-pilling polyester cotton knitted fabric is formed by blending polyester yarn coated yarns and cotton threads, and is characterized in that the polyester yarn coated yarns are prepared according to the following steps:
s201, drying the low-melting-point polyester chip to obtain a dried chip with the water content less than or equal to 5%;
and S202, taking the polyester yarn as a core layer, melting and extruding the dried slices, coating the polyester yarn with the slices to form a coating layer, and cooling to obtain the polyester yarn coated yarn.
2. The method of claim 1, wherein: the melting point of the low-melting-point polyester chip is 130-170 ℃.
3. The method of claim 1, wherein: the intrinsic viscosity of the low-melting-point polyester chip is less than 0.6 dL/g.
4. The method of claim 1, wherein: in the step S102, the length-diameter ratio of a screw of an extruder adopted during melt extrusion of the low-melting-point polyester chip is 22-26.
5. The anti-pilling polyester cotton knitted fabric according to claim 1, characterized in that: the anti-pilling polyester cotton knitted fabric is obtained by finishing an acrylate-waterborne polyurethane composite emulsion, wherein the acrylate-waterborne polyurethane composite emulsion is prepared from the following raw materials in parts by weight:
dimethylolpropionic acid: 5-8 parts;
polyethylene glycol-2000: 25-35 parts;
toluene diisocyanate: 25-35 parts;
acrylate ester monomer: 30-45 parts of a solvent;
sodium dodecylbenzenesulfonate: 3-5 parts;
ethylene diamine: 1-3 parts;
1, 4-butanediol: 1-3 parts;
triethylamine: 3-5 parts;
n-methylpyrrolidone: 5-10 parts;
acetone: 5-20 parts.
6. The anti-pilling polyester cotton knitted fabric according to claim 5, characterized in that: the acrylate-waterborne polyurethane composite emulsion is prepared by the following method:
s101, fully mixing toluene diisocyanate and polyethylene glycol-2000, heating to 70-80 ℃, reacting for 1-2 hours in a heat preservation manner, adding a proper amount of acetone, and cooling to 65-70 ℃ to prepare a first premix;
s102, dripping 1, 4-butanediol, dimethylolpropionic acid and N-methyl pyrrolidone into the first premix, and reacting for 2-3h under heat preservation to prepare prepolymer emulsion;
s103, heating the prepolymer emulsion to 70-75 ℃, adding sodium dodecyl benzene sulfonate and an acrylate monomer, uniformly mixing, and cooling to 38-45 ℃ to obtain a second premix;
s104, stirring and mixing the first premix and a triethylamine aqueous solution uniformly under the condition of high-speed stirring, adding a proper amount of ethylenediamine, and continuously stirring uniformly to obtain a composite emulsion;
and S105, heating the composite emulsion to 70-80 ℃, dropwise adding an acetone solution of azodiisobutyronitrile, reacting for 1-2 hours while keeping the temperature after dropwise adding, standing, filtering, and removing the solvent by reduced pressure distillation to obtain the acrylic ester-waterborne polyurethane composite emulsion.
7. The anti-pilling polyester cotton knitted fabric according to claim 6, characterized in that: the raw materials of the acrylate-waterborne polyurethane composite emulsion also comprise 5-10 parts of epoxy resin, and the epoxy resin is dripped in the step S102.
8. The preparation method of the anti-pilling polyester-cotton knitted fabric as claimed in any one of claims 1 to 7, characterized by comprising the following steps: the method comprises the following steps:
s301, blending polyester coated yarns and cotton threads to obtain polyester-cotton knitted fabric, and then soaking the polyester-cotton knitted fabric into acrylic ester-waterborne polyurethane composite emulsion at a bath ratio of 1: 10-1: 15 for 30-60 min to obtain a soaked fabric;
s302, taking out the impregnated fabric and rolling, wherein the pressure between rollers of a padder is 0.1-0.2 MPa, and the rolling residual rate of the impregnated fabric after rolling is 85-90%, so as to obtain a rolled fabric;
s303, drying the prepared rolled fabric at the temperature of 60-90 ℃ for 5-10 min to obtain a dried fabric with the water content of less than 0.5%;
s304, baking and shaping the dried fabric at the temperature of 110-130 ℃ for 2-4 min to obtain the anti-pilling polyester cotton knitted fabric.
9. The preparation method of the anti-pilling polyester-cotton knitted fabric according to claim 8, characterized by comprising the following steps: before the dipping treatment in the step S301, the polyester-cotton knitted fabric is preheated for 3-5 min at the temperature of 90-120 ℃, and then cooled to the room temperature.
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