CN111005218A - Conductive superfine fiber suede leather and preparation method thereof - Google Patents
Conductive superfine fiber suede leather and preparation method thereof Download PDFInfo
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- CN111005218A CN111005218A CN201911299222.7A CN201911299222A CN111005218A CN 111005218 A CN111005218 A CN 111005218A CN 201911299222 A CN201911299222 A CN 201911299222A CN 111005218 A CN111005218 A CN 111005218A
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- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
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- 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
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/09—Addition of substances to the spinning solution or to the melt for making electroconductive or anti-static filaments
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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
- 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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- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
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- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
- D06M13/188—Monocarboxylic acids; Anhydrides, halides or salts thereof
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- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
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- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/20—Polyalkenes, polymers or copolymers of compounds with alkenyl groups bonded to aromatic groups
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- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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Abstract
The invention discloses conductive superfine fiber suede leather and a preparation method thereof. On one hand, the carbon fiber modified PA6 resin is added in the spinning process, so that a suede leather fiber matrix has a carbon fiber conductive network, and the conductive effect is improved; on the other hand, through the citrate sol finishing liquid for dipping transition metal, a large amount of conductive transition metal fine particles are adsorbed in the micro-pores of the microfiber leather, so that the contact property of the carbon fiber conductive network partially coated by the insulating polyurethane and the surface conductive fine particles is greatly improved, the conductive performance of the product can be obviously improved, and the requirements of conductive glove leather are met.
Description
Technical Field
The invention relates to superfine fiber suede leather, in particular to conductive superfine fiber suede leather and a preparation method thereof, and belongs to the field of superfine fiber suede leather.
Background
With the development of technology, capacitive touch screen products are becoming popular all over the world, and with the further development of this trend, touch control, a brand new human-computer interaction mode, is widely applied in various aspects of life. However, in cold weather, since such products cannot be used because of wearing non-conductive gloves, the use environment of the products is greatly limited, and thus, it is expected that the market demand for synthetic leather with low resistivity as conductive glove leather will be considerable.
However, in the conventional methods, a conductive material such as carbon black is added to wet polyurethane and then impregnated into a base fabric, and in this case, a filler such as carbon black is likely to precipitate, agglomerate, or the like, and thus the conductive property is unstable, and the surface of the base fabric is also likely to have black spots or the like.
The superfine fiber suede glove leather has the characteristics of high grade, air and moisture permeability, wear resistance and the like, but the existing superfine fiber suede material is composed of polyurethane and nylon or polyester and is an electric insulator, the invention adds carbon fiber reinforced nylon resin in spinning, and the microfiber suede leather is immersed into the citrate sol finishing liquid with transition metal, because the transition metal has the conductive function, and the carbon fiber and the suede material with a micropore structure in the sol-gel system can adsorb more fine particles (transition metal Mn), not only can utilize the quasi-capacitance effect of metal ions to increase the capacitance of suede leather, but also can exert the characteristics of large specific surface area and low internal resistance of active carbon fiber, and noble metal is not used, so that the conductive material has good comprehensive performance, convenient processing and low cost, and has good conductive performance and good application prospect.
Disclosure of Invention
The invention aims to provide conductive microfiber suede leather and a preparation method thereof, and aims to overcome the defects in the prior art.
The preparation method of the conductive superfine fiber suede leather comprises the following steps:
(1) uniformly mixing nylon 6, low-density polyethylene and carbon fiber modified PA6 resin, and performing melt extrusion, spinning, oiling, drafting, curling, shaping, cutting and other processes to obtain the island-in-sea short fiber;
the weight parts of the components are as follows:
6100 portion of nylon
80-104 parts of low-density polyethylene
1-10 parts of carbon fiber modified PA6 resin
Preferably, the weight parts of the components are as follows:
6100 portion of nylon
86-100 parts of low-density polyethylene
2-6 parts of carbon fiber modified PA6 resin
The carbon fiber modified PA6 resin is a mixture of carbon fibers and nylon 6, and the weight percentage of the carbon fibers is as follows: 1% -10%, nylon 6: 90% -99%, can adopt commercial products, such as: a carbon fiber reinforced polyamide PA6 modified resin produced by Kaalizli plastic raw material Co.
The processes of melt extrusion, spinning, oiling, drawing, curling, shaping, cutting and the like are conventional methods, and specific references can be made to documents: qujiabo et al. synthetic leather technology [ M ]. Beijing: the method described in chemical industry Press, 2010;
(2) preparing the island-indefinite sea short fibers obtained in the step (1) into a conductive non-woven fabric through carding, lapping and needling;
the carding, lapping and needling methods described, for conventional techniques for preparing nonwoven fabrics, can be found in the literature: qujiabo et al. synthetic leather technology [ M ]. Beijing: the chemical industry Press, 2010;
the obtained conductive non-woven fabric has a grammage of 300-700 g/m2The thickness is 0.8-2.0 mm;
(3) dipping the obtained non-woven fabric into a polyurethane solution, and then carrying out solidification and water washing treatment to obtain a base fabric containing polyurethane resin;
the polyurethane solution comprises the following components in parts by weight:
100 parts of polyurethane resin organic solution
N, N-Dimethylformamide (DMF) 186-300 parts
The polyurethane resin organic solution is a solution of polyurethane resin in an organic solvent N, N-Dimethylformamide (DMF), wherein the weight concentration of polyurethane is 25-35%;
the methods of dipping, solidifying, washing and the like are conventional technologies for preparing superfine fiber synthetic leather base cloth, and reference can be made to the following documents: qujiabo et al. synthetic leather technology [ M ]. Beijing: the chemical industry Press, 2010;
(4) extracting low-density polyethylene from the base cloth containing the polyurethane resin by using toluene at the temperature of 80-90 ℃, and performing fiber opening treatment to prepare a semi-finished product of the conductive microfiber suede material;
(5) dipping the semi-finished product of the conductive microfiber suede material in the step (4) in a citrate sol finishing solution subjected to sol-gel reaction, dipping and rolling, wherein the liquid carrying rate is 70-80% (by weight), then pre-baking at 110-130 ℃, baking for 1-3 minutes at 150-170 ℃, and then performing after-finishing by adopting a conventional method to obtain the conductive microfiber suede leather;
the after-finishing comprises splitting, grinding, dyeing and washing and drying;
the after-finishing of splitting, buffing, dyeing, washing and drying and the like is a conventional method, and can be seen in documents: qujiabo et al. synthetic leather technology [ M ]. Beijing: the chemical industry Press, 2010;
the citrate sol finishing liquid subjected to the sol-gel reaction comprises the following components in parts by weight:
citric acid (1-7 parts),
manganese acetate. cndot. 2-12 part(s)
100 parts of water
Dissolving manganese acetate in water, adding citric acid after uniformly stirring, then dropwise adding ammonia water into the solution to adjust the pH value of the solution to be close to 7, and continuously stirring until uniform sol is formed.
The sol-gel reaction is carried out at room temperature, and the time of the sol-gel reaction is 1-15 h.
Preferably, the citrate sol finishing liquid subjected to the sol-gel reaction comprises the following components in parts by weight:
citric acid 3-5 parts
5-10 parts of manganese acetate
100 parts of water
The sol-gel reaction is carried out at room temperature, and the time of the sol-gel reaction is 5-12 h.
The citric acid can be commercialized products, such as: citric acid from suzhou xiangsong chemical ltd; the manganese acetate can be commercial products, such as manganese acetate of Wuhan La Na white pharmaceutical chemical industry Co., Ltd; the ammonia water can be commercial products, such as ammonia water of Shandong Changchang Shengcheng chemical industry Co.
The invention has the following beneficial effects: on one hand, the carbon fiber modified PA6 resin is added in the spinning, so that a suede leather fiber matrix has a carbon fiber conductive network, the conductive effect is improved, although the higher the proportion is, the better the conductive effect of the prepared microfiber suede material is, the higher the proportion of the carbon fiber PA6 resin is, the physical property of the product and the spinnability of the fiber are affected, and therefore, the relative dosage of the carbon fiber modified PA6 resin is limited within a proper range. On the other hand, through the citrate sol finishing liquid for dipping transition metal, a large amount of conductive transition metal fine particles are adsorbed in the micro-pores of the microfiber leather, so that the contact property of the carbon fiber conductive network partially coated by the insulating polyurethane and the surface conductive fine particles is greatly improved, the conductive performance of the product can be obviously improved, and the requirements of conductive glove leather are met.
Detailed Description
The present invention is further illustrated by the following examples, but is not limited thereto. In the following examples, the low density polyethylene has a density of 0.910 to 0.925g/cm3。
The polyurethane used is purchased from Zhejiang Huafeng synthetic resin Co., Ltd; citric acid was purchased from suzhou xiangsong chemical ltd; manganese acetate was purchased from pharmaceutical chemicals, Inc. of Wuhan La Na white; ammonia was purchased from san Cheng chemical Co., Ltd, Shandong.
Example 1
The method for manufacturing the microfiber synthetic leather comprises the following steps:
uniformly mixing nylon 6, low-density polyethylene and carbon fiber modified PA6 resin in the weight ratio of 50 parts, 43 parts and 1 part, and performing melt extrusion, spinning, oiling, drafting, curling, shaping, cutting and other processes to obtain the island-island staple fiber;
carding, lapping and needling to obtain 300g/m2Non-woven fabric with the thickness of 0.8 mm;
dipping the non-woven fabric into a polyurethane solution; soaking polyurethane in the fiber gaps, and then performing solidification and water washing treatment to obtain a base fabric containing polyurethane;
the polyurethane solution comprises the following components in parts by weight:
polyurethane resin organic solution (JF-w-3100, weight concentration 25%). cndot. 100 parts
N, N-Dimethylformamide (DMF) · 300 part
And (3) drawing out the fiber by using hot toluene at the temperature of 80 ℃, spreading, drying and the like, and finishing to obtain the superfine fiber synthetic leather base cloth.
Dipping the mixture in a citrate sol finishing solution subjected to sol-gel reaction, and dipping and rolling the mixture once, wherein the liquid carrying rate is 70%, the pre-baking is carried out at 110 ℃, the baking temperature is 150 ℃, and the conductive microfiber synthetic leather is obtained after 1 minute;
the citrate sol finishing liquid subjected to the sol-gel reaction comprises the following components in parts by weight:
citric acid 3 part of it
5 parts of manganese acetate
100 parts of water
Dissolving manganese acetate in water, adding citric acid after uniformly stirring, dropwise adding ammonia water into the solution to adjust the pH value of the solution to be close to 7, and continuously stirring until uniform sol is formed;
the sol-gel reaction is carried out at room temperature, and the time of the sol-gel reaction is 5 h.
The 5-type sample in the GB/T1040.3-2006 standard is adopted for detection and analysis (the same below), the standard is used for detection, and the obtained microfiber suede leather comprises the following components in parts by weight:
100 parts of nylon 6. cnidium. cndot. cna
90 parts of polyurethane resin
Carbon fiber PA6 resin (2)
The test adopts a direct current circuit to measure the conductivity of the superfine fiber suede leather, a sample to be measured is firstly placed between two copper electrodes with the mass of 100g and the area of 4cm x 3cm before the test, and the electrodes have certain mass in order to ensure that the electrodes and the sample to be measured realize good contact. During testing, the galvanometer is connected in series with the suede leather sample, the direct current voltmeter is connected in parallel with the series circuit of the galvanometer and the suede leather sample, finally, the direct current voltmeter and the direct current power supply form a closed loop, current generated by the power supply sequentially flows through the galvanometer and the suede leather sample, the output voltage of the power supply is continuously adjusted, and meanwhile, the reading U of the direct current voltmeter and the reading I (testing method, the same below) of the galvanometer are recorded, and the conductivity is 5 multiplied by 10-7s/m。
Example 2
Uniformly mixing nylon 6, low-density polyethylene and carbon fiber modified PA6 resin in the weight ratio of 50 parts, 45 parts and 1.5 parts, and performing melt extrusion, spinning, oiling, drafting, curling, shaping, cutting and other processes to obtain the island-in-sea short fiber;
carding, lapping and needling to obtain 450g/m2A nonwoven fabric having a thickness of 1 mm;
dipping the non-woven fabric into a polyurethane solution; soaking polyurethane in the fiber gaps, and then performing solidification and water washing treatment to obtain a base fabric containing polyurethane;
the polyurethane solution comprises the following components in parts by weight:
polyurethane resin organic solution (JF-w-3100, 30% by weight) 100 parts of
N, N-Dimethylformamide (DMF) · 233 part (g) · N, N-Dimethylformamide (DMF) · N ·
And (3) drawing out the fiber by using hot toluene at the temperature of 80 ℃, spreading, drying and the like, and finishing to obtain the superfine fiber synthetic leather base cloth.
Dipping the mixture in a citrate sol finishing solution subjected to sol-gel reaction, and dipping and rolling the mixture once, wherein the liquid carrying rate is 75%, and the mixture is pre-baked at 120 ℃, and the baking temperature is 160 ℃, and the mixture is baked for 2 minutes to obtain the conductive microfiber synthetic leather;
the citrate sol finishing liquid subjected to the sol-gel reaction comprises the following components in parts by weight:
citric acid 5 part
10 parts of manganese acetate
100 parts of water
Dissolving manganese acetate in water, adding citric acid after uniformly stirring, dropwise adding ammonia water into the solution to adjust the pH value of the solution to be close to 7, and continuously stirring until uniform sol is formed;
the sol-gel reaction is carried out at room temperature, and the time of the sol-gel reaction is 12 h.
Detecting and analyzing by using a 5-type sample in GB/T1040.3-2006 standard, wherein the obtained microfiber suede leather comprises the following components in parts by weight:
100 parts of nylon 6. cndot. 100 parts
100 parts of polyurethane resin
Carbon fiber-modified PA6 resin (3 part)
The detection proves that the product has the conductivity of 3 multiplied by 10-6s/m。
Example 3
Uniformly mixing 50 parts by weight, 50 parts by weight and 2.5 parts by weight of nylon 6, low-density polyethylene and carbon fiber modified PA6 resin, and performing melt extrusion, spinning, oiling, drafting, curling, shaping, cutting and other processes to obtain the island-in-sea short fiber;
carding, lapping and needling to obtain 700g/m2A nonwoven fabric having a thickness of 2.0 mm;
dipping the non-woven fabric into a polyurethane solution; soaking polyurethane in the fiber gaps, and then performing solidification and water washing treatment to obtain a base fabric containing polyurethane;
the polyurethane solution comprises the following components in parts by weight:
polyurethane resin organic solution (JF-w-3100, 30% by weight) 100 parts of
N, N-Dimethylformamide (DMF) · 233 part (g) · N, N-Dimethylformamide (DMF) · N ·
And (3) drawing out the fiber by using hot toluene at the temperature of 80 ℃, spreading, drying and the like, and finishing to obtain the superfine fiber synthetic leather base cloth.
Dipping the mixture in a citrate sol finishing solution subjected to sol-gel reaction, and carrying out dipping and rolling for 3 minutes at a liquid carrying rate of 75 percent, pre-baking at 130 ℃ and a baking temperature of 170 ℃ to obtain the conductive microfiber synthetic leather;
the citrate sol finishing liquid subjected to the sol-gel reaction comprises the following components in parts by weight:
citric acid 4.5 part of
5 parts of manganese acetate
100 parts of water
Dissolving manganese acetate in water, adding citric acid after uniformly stirring, dropwise adding ammonia water into the solution to adjust the pH value of the solution to be close to 7, and continuously stirring until uniform sol is formed;
the sol-gel reaction is carried out at room temperature, and the time of the sol-gel reaction is 9 h.
Detecting and analyzing by using a 5-type sample in GB/T1040.3-2006 standard, wherein the obtained microfiber suede leather comprises the following components in parts by weight:
100 parts of nylon 6. cndot. 100 parts
105 parts of polyurethane resin
Carbon fiber-modified PA6 resin (5 parts)
The detection proves that the product has the conductivity of 6 multiplied by 10-5s/m。
Example 4
Uniformly mixing nylon 6, low-density polyethylene and carbon fiber modified PA6 resin in the weight ratio of 50 parts, 47 parts and 3 parts, and performing melt extrusion, spinning, oiling, drafting, curling, shaping, cutting and other processes to obtain the island-island staple fiber;
carding, lapping and needling to obtain 500g/m2A non-woven fabric with the thickness of 1.4 mm;
dipping the non-woven fabric into a polyurethane solution; soaking polyurethane in the fiber gaps, and then performing solidification and water washing treatment to obtain a base fabric containing polyurethane;
the polyurethane solution comprises the following components in parts by weight:
polyurethane resin organic solution (JF-w-3100, 30% by weight) 100 parts of
N, N-Dimethylformamide (DMF) · 233 part
And (3) drawing out the fiber by using hot toluene at the temperature of 80 ℃, spreading, drying and the like, and finishing to obtain the superfine fiber synthetic leather base cloth.
Dipping the synthetic leather into a citrate sol finishing solution subjected to sol-gel reaction, and dipping and rolling the synthetic leather once, wherein the liquid carrying rate is 80%, the pre-baking temperature is 125 ℃, and the baking temperature is 165 ℃ for 2 minutes to obtain the environment-friendly microfiber synthetic leather;
the citrate sol finishing liquid subjected to the sol-gel reaction comprises the following components in parts by weight:
citric acid 6 part by weight
5 parts of manganese acetate
100 parts of water
Dissolving manganese acetate in water, adding citric acid after uniformly stirring, dropwise adding ammonia water into the solution to adjust the pH value of the solution to be close to 7, and continuously stirring until uniform sol is formed;
the sol-gel reaction is carried out at room temperature, and the time of the sol-gel reaction is 7 h.
Detecting and analyzing by using a 5-type sample in GB/T1040.3-2006 standard, wherein the obtained microfiber suede leather comprises the following components in parts by weight:
100 parts of nylon 6. cndot. 100 parts
100 parts of polyurethane resin
Carbon fiber-modified PA6 resin (6 part)
The detection proves that the product has the conductivity of 4 multiplied by 10-3s/m。
Comparative example 1
The method for manufacturing the microfiber synthetic leather comprises the following steps:
uniformly mixing nylon 6, low-density polyethylene and carbon fiber modified PA6 resin in the weight ratio of 50 parts, 47 parts and 1.2 parts, and performing melt extrusion, spinning, oiling, drafting, curling, shaping, cutting and other processes to obtain the island-in-sea short fiber;
carding, lapping and needling to obtain 400g/m2A nonwoven fabric having a thickness of 0.9 mm;
dipping the non-woven fabric into a polyurethane solution; soaking polyurethane in the fiber gaps, and then performing solidification and water washing treatment to obtain a base fabric containing polyurethane;
the polyurethane solution comprises the following components in parts by weight:
polyurethane resin organic solution (JF-w-3100, 28% by weight) 100 parts of
N, N-Dimethylformamide (DMF) · 300 part
And (3) drawing out the fiber by using hot toluene at the temperature of 80 ℃, spreading, drying and the like, and finishing to obtain the superfine fiber synthetic leather base cloth.
Detecting and analyzing by using a 5-type sample in GB/T1040.3-2006 standard, wherein the obtained microfiber suede leather comprises the following components in parts by weight:
100 parts of nylon 6. cndot. 100 parts
100 parts of polyurethane resin
Carbon fiber-modified PA6 resin (2.4 part)
The detection proves that the product has the conductivity of 1 multiplied by 10-9s/m。
As can be seen from comparative example 1, the addition of only the carbon fiber-modified PA6 resin significantly reduced the conductivity because the surface of the resin was partially covered with insulating polyurethane by the impregnation with polyurethane, although the carbon fiber conductive network was present in the fiber skeleton.
Comparative example 2
The method for manufacturing the microfiber suede leather comprises the following steps:
uniformly mixing 50 parts by weight of nylon 6 and 47 parts by weight of low-density polyethylene, and performing melt extrusion, spinning, oiling, drafting, curling, shaping, cutting and other processes to obtain the island-in-sea short fiber;
carding, lapping and needling to obtain 500g/m2A non-woven fabric with a thickness of 1.0 mm;
dipping the non-woven fabric into a polyurethane solution; soaking polyurethane in the fiber gaps, and then performing solidification and water washing treatment to obtain a base fabric containing polyurethane;
the polyurethane solution comprises the following components in parts by weight:
polyurethane resin organic solution (JF-w-3100, 30% by weight) 100 parts of
N, N-Dimethylformamide (DMF) · 300 part
And (3) drawing out the fiber by using hot toluene at the temperature of 80 ℃, spreading, drying and the like, and finishing to obtain the superfine fiber synthetic leather base cloth.
Dipping the synthetic leather into a citrate sol finishing solution subjected to sol-gel reaction, and dipping and rolling the synthetic leather once, wherein the liquid carrying rate is 80%, the pre-baking temperature is 125 ℃, and the baking temperature is 165 ℃ for 2 minutes to obtain the environment-friendly microfiber synthetic leather;
the citrate sol finishing liquid subjected to the sol-gel reaction comprises the following components in parts by weight:
citric acid 5 part
Manganese (ii) acetate (7 part)
100 parts of water
Dissolving manganese acetate in water, adding citric acid after uniformly stirring, dropwise adding ammonia water into the solution to adjust the pH value of the solution to be close to 7, and continuously stirring until uniform sol is formed;
the sol-gel reaction is carried out at room temperature, and the time of the sol-gel reaction is 11 h.
Detecting and analyzing by using a 5-type sample in GB/T1040.3-2006 standard, wherein the obtained microfiber suede leather comprises the following components in parts by weight:
100 parts of nylon 6. cnidium. cndot. cna
100 parts of a polyurethane resin
The detection proves that the product has the conductivity of 7 multiplied by 10-11s/m。
As can be seen from comparative example 2, when no carbon fiber modified PA6 resin was added, a carbon fiber conductive network did not exist in the fiber skeleton, and although a large amount of transition metal conductive particles were adsorbed, the conductive network could not be formed well, and thus the conductivity was also low and could not meet the requirements.
Claims (10)
1. The conductive superfine fiber suede leather is characterized in that the preparation method comprises the following steps:
(1) uniformly mixing nylon 6, low-density polyethylene and carbon fiber modified PA6 resin, and performing melt extrusion, spinning, oiling, drafting, curling, shaping and cutting to obtain the island-in-sea short fiber;
(2) preparing the island-indefinite sea short fibers obtained in the step (1) into a conductive non-woven fabric through carding, lapping and needling;
(3) dipping the obtained non-woven fabric into a polyurethane solution, and then carrying out solidification and water washing treatment to obtain a base fabric containing polyurethane resin;
(4) extracting low-density polyethylene from the base cloth containing the polyurethane resin by using toluene at the temperature of 80-90 ℃, and performing fiber opening treatment to prepare a semi-finished product of the conductive microfiber suede material;
(5) and (3) dipping the semi-finished product of the conductive microfiber suede material obtained in the step (4) into a citrate sol finishing liquid subjected to sol-gel reaction, dipping and rolling, wherein the liquid carrying rate is 70-80% by weight, then pre-baking at 110-130 ℃, baking for 1-3 minutes at 150-170 ℃, and then performing after-finishing by adopting a conventional method to obtain the conductive microfiber suede leather.
2. The conductive superfine fiber suede leather according to claim 1, wherein the weight parts of the components in the step (1) are as follows:
6100 portion of nylon
80-104 parts of low-density polyethylene
1-10 parts of carbon fiber modified PA6 resin;
preferably, the first and second liquid crystal materials are,
6100 portion of nylon
86-100 parts of low-density polyethylene
2-6 parts of carbon fiber modified PA6 resin.
3. The conductive microfiber suede leather of claim 1, wherein the carbon fiber modified PA6 resin is a mixture of carbon fibers and nylon 6, and the weight percentage of the carbon fibers is as follows: 1% -10%, nylon 6: 90% -99%.
4. The conductive microfiber suede leather of claim 3, wherein the conductive nonwoven fabric obtained in step (2) has a grammage of 300-700 g/m2The thickness is 0.8 to 2.0 mm.
5. The conductive microfiber suede leather of claim 3, wherein the polyurethane solution comprises the following components in parts by weight:
100 parts of polyurethane resin organic solution
186-300 parts of N, N-Dimethylformamide (DMF)
The polyurethane resin organic solution is a solution of polyurethane resin in an organic solvent N, N-Dimethylformamide (DMF), wherein the weight concentration of polyurethane is 25-35%.
6. The conductive superfine fiber suede leather according to claim 3, wherein the citrate sol finishing solution subjected to the sol-gel reaction comprises the following components in parts by weight:
1-7 parts of citric acid, namely,
2-12 parts of manganese acetate
100 portions of water
Dissolving manganese acetate in water, adding citric acid after uniformly stirring, then dropwise adding ammonia water into the solution to adjust the pH value of the solution to be close to 7, and continuously stirring until uniform sol is formed.
7. The conductive superfine fiber suede leather according to claim 6, wherein the citrate sol finishing solution subjected to the sol-gel reaction comprises the following components in parts by weight:
3-5 parts of citric acid
5-10 parts of manganese acetate
100 parts of water.
8. The conductive superfine fiber suede leather according to any one of claims 3-7, wherein the sol-gel reaction is carried out at room temperature, and the time of the sol-gel reaction is 1-15 h; preferably 5-12 h.
9. The method for preparing the conductive superfine fiber suede leather according to the claims 1-8, which is characterized by comprising the following steps:
(1) uniformly mixing nylon 6, low-density polyethylene and carbon fiber modified PA6 resin, and performing melt extrusion, spinning, oiling, drafting, curling, shaping and cutting to obtain the island-in-sea short fiber;
(2) preparing the island-indefinite sea short fibers obtained in the step (1) into a conductive non-woven fabric through carding, lapping and needling;
(3) dipping the obtained non-woven fabric into a polyurethane solution, and then carrying out solidification and water washing treatment to obtain a base fabric containing polyurethane resin;
(4) extracting low-density polyethylene from the base cloth containing the polyurethane resin by using toluene at the temperature of 80-90 ℃, and performing fiber opening treatment to prepare a semi-finished product of the conductive microfiber suede material;
(5) and (3) dipping the semi-finished product of the conductive microfiber suede material obtained in the step (4) into a citrate sol finishing liquid subjected to sol-gel reaction, dipping and rolling, wherein the liquid carrying rate is 70-80% by weight, then pre-baking at 110-130 ℃, baking for 1-3 minutes at 150-170 ℃, and then performing after-finishing by adopting a conventional method to obtain the conductive microfiber suede leather.
10. The method for preparing the conductive superfine fiber suede leather according to claim 9, wherein the after-finishing comprises splitting, buffing, dyeing and washing and drying.
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| CN111719319A (en) * | 2020-05-22 | 2020-09-29 | 东风汽车集团有限公司 | High-thermal-conductivity superfine fiber polyurethane synthetic leather and preparation method and application thereof |
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