CN111021067A - Treatment method of light and thin thermal insulation textile - Google Patents
Treatment method of light and thin thermal insulation textile Download PDFInfo
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- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
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Abstract
The invention relates to the field of textiles and discloses a method for treating a light and thin thermal textile. The method comprises the following processing procedures: (1) grinding cellulose, sodium bicarbonate, silica aerogel and cellulose ether to prepare a compound; (2) preparing composite particles coated with amino silicone elastic emulsion; (3) treating the composite particles coated with the emulsion in a hot airflow fluidized bed under an acidic condition to prepare loose spherical particles coated with the amino silicone elastic membrane; (4) adding the loose spherical particles into the aqueous polyurethane liquid, and adjusting the viscosity by using ethanol to prepare a warm-keeping modified dispersion liquid; (5) and (3) soaking the textile cloth in the heat preservation modified dispersion liquid after corona treatment, then padding, and drying to obtain the light and thin heat preservation textile. The processing method of the invention enables the surface of the textile cloth to form an extremely thin and loose heat-preservation layer consisting of loose particles, and the obtained textile has good heat-preservation effect, good light and thin effect, good air permeability and excellent comfort.
Description
Technical Field
The invention relates to the field of textiles and discloses a method for treating a light and thin thermal textile.
Background
With the development of science and technology, the requirements of clothes are higher and higher. The weaving technology and the after finishing technology gradually develop to be multifunctional. Warmth retention is one of the most basic functions of textiles, especially apparel textiles. The heat preservation is not the heat loss, the exchange between body heat and surrounding cold air is blocked, and thousands of heat preservation materials in the market are manufactured by utilizing the principle.
The heat preservation mode is mainly characterized in that the more the number of fibers in the same space is, the larger the isolation layer formed on the surface area of the fibers and used for blocking heat radiation is, the more the material is kept warm, and the thinner the fibers are required; the more air trapped inside the fiber, the less conductive heat loss, and the higher the material's thermal efficiency, which requires the fiber to be hollow. Thin and hollow, which is the characteristic of the thermal insulation material. The existing thermal textiles are mainly divided into two types: one is padding, such as down jackets, space cotton suits, etc., which are lightweight, but bulky; the other method is to compound the fabric in multiple layers, for example, the surface, the middle layer and the inner layer are woven into a piece of fabric, wherein the middle layer has the heat preservation function, but the thickness and the air permeability of the fabric are easily reduced.
The fabric for the thermal garment is mainly comfortable, has thermal insulation property, is light, thin and attractive, and is breathable and moisture-absorbing. Therefore, in order to meet the demand, it is a great trend to make the thermal garment fabric light and thin. The fabric after-finishing is a mature technology at present, and has been developed quite mature in the aspects of improving the wrinkle resistance, the antibacterial property, the water resistance, the self-cleaning property and the like of textiles. However, there is a gap in improving the warmth retention property, and it is critical how to form a warmth retention layer in an extremely thin finishing layer.
Chinese patent application No. 201320564274.4 discloses a light and thin thermal composite fabric. The light, thin and warm-keeping composite fabric comprises a fabric layer, an adhesive layer and an e-PTFE film layer; the fabric layer and the e-PTFE film layer are in composite connection through adhesion layer lamination, and the surface of the fabric layer and the surface of the e-PTFE film layer are provided with concave-convex patterns.
The Chinese patent application No. 201711317467.9 discloses a textile with a warm-keeping function, which comprises a textile body, wherein the textile body is formed by combining a warm-keeping outer layer and a warm-keeping inner layer, criss-cross natural fibers are arranged in the warm-keeping inner layer, heat-conducting fibers are wound on each natural fiber, heat-storage and warm-keeping convex points which are arranged at equal intervals are arranged on each heat-conducting fiber, the warm-keeping outer layer comprises a heat-insulating layer, a black material layer is arranged on the outer surface of the heat-insulating layer, breathable films are uniformly distributed on the heat-insulating layer, a heat-insulating gap is reserved in the heat-insulating.
According to the above, the fabric for thermal textiles in the existing scheme has the defects of heavy thickness and poor air permeability, the thermal clothes fabric tends to be light and thin, the thermal performance is usually sacrificed when the light and thin fabric is realized, and the existing technology for improving the thermal performance of the fabric through a textile after-finishing method has a blank.
Disclosure of Invention
At present, widely applied thermal insulation textiles have the defects of heavy weight, overstaffed, poor air permeability and the like, and light and thin thermal insulation textiles often have the problem of poor thermal insulation effect, so that the development and application of light and thin thermal insulation textiles are influenced. The invention realizes the lightness and thinness of the warm-keeping textile.
In order to achieve the purpose, the invention carries out treatment by the following specific technical scheme:
a method for processing light and thin warm-keeping textiles comprises the following specific steps:
(1) firstly, adding cellulose, sodium bicarbonate, silicon dioxide aerogel and cellulose ether into grinding equipment, and then grinding and uniformly mixing to obtain a compound; the material comprises, by weight, 90-93 parts of cellulose, 2-5 parts of sodium bicarbonate, 3-6 parts of silica aerogel and 0.5-1 part of cellulose ether;
(2) feeding the compound obtained in the step (1) into a fluidized bed, suspending compound particles in gas fluid, and spraying amino silicone elastic emulsion to uniformly coat the emulsion on the surfaces of the compound particles to prepare emulsion-coated compound particles; the raw materials comprise, by weight, 82-89 parts of a compound and 8-15 parts of amino silicone elastic emulsion;
(3) feeding the composite particles coated with the emulsion prepared in the step (2) into a hot airflow fluidized bed, and spraying citric acid solution to react the composite particles coated with the emulsion for 20-40 min under an acid environment and a heating condition to prepare loose spherical particles coated with the amino silicone elastic membrane;
(4) dispersing the loose spherical particles prepared in the step (3) in aqueous polyurethane liquid, adding ethanol to adjust viscosity, and dispersing uniformly to obtain a warm-keeping modified dispersion liquid; the raw materials comprise, by weight, 15-35 parts of loose spherical particles and 50-80 parts of aqueous polyurethane liquid;
(5) and (3) carrying out corona treatment on the textile fabric, then soaking the textile fabric in the thermal-insulation modified dispersion liquid prepared in the step (4) for 5-10 min, carrying out padding treatment on the textile fabric by a finishing padding machine, and finally drying the textile fabric at the temperature of 80-90 ℃ to obtain the light and thin thermal-insulation textile.
The silica aerogel has the performances of a nano structure, high specific surface area, high porosity, low density, low thermal conductivity coefficient and the like, is an excellent light heat-insulating material, and can be used for preparing a light heat-insulating composite material; the invention creatively takes silicon dioxide aerogel, cellulose and sodium bicarbonate as raw materials, cellulose ether and sodium bicarbonate as auxiliary materials, and the sodium bicarbonate can be used as a foaming agent to prepare the foaming loose cellulose under the heating condition, so as to obtain the inner core structure of the foaming loose cellulose and silicon dioxide aerogel compound; in addition, the cellulose ether has the functions of dispersing and using a tackifier, so that the cellulose and silicon dioxide aerogel can be conveniently compounded. Preferably, the particle size of the silica aerogel in the step (1) is 10-20 μm; the cellulose ether is one of methyl cellulose ether, hydroxypropyl methyl cellulose ether, ethyl cellulose ether, hydroxyethyl cellulose ether, hydroxypropyl cellulose ether and hydroxymethyl cellulose ether.
The molecules of the amino silicone elastic emulsion have amino and hydroxyl active groups, can be self-crosslinked and solidified into an elastic membrane without adding a catalyst and a crosslinking agent, has strong affinity to various fabrics such as synthetic fibers, natural fibers and the like, and can be crosslinked with the reaction groups of the fibers in one step in baking; endows the fabric with durable washing softness, smoothness, stiff and elastic style and good air permeability, can overcome the defect of pilling, and has obvious woolen feeling and the like. Preferably, the amino silicone elastic emulsion in the step (2) is olyloxy-303 with the mass concentration of 15-20%.
The invention creatively coats amino silicone elastic emulsion on the surface of a compound of cellulose, sodium bicarbonate, silicon dioxide aerogel and cellulose ether in advance, then treats the compound in a hot airflow fluidized bed, the fluidized bed treatment can fully disperse compound particles into fine particles, the emulsion is uniformly coated with the emulsion, citric acid is further sprayed for reaction, the coating film is cured under the acid environment and the heating condition of the citric acid to form an elastic film, meanwhile, the sodium bicarbonate in the compound particles generates gas foaming, the particles are fluffy and expanded to form loose spherical particles coated by the amino silicone elastic film, closed-pore loose spherical particles are obtained, the coating film of the closed-pore loose spherical particles is an amino silicone elastic film, and the inner core of the closed-pore loose cellulose and silicon dioxide aerogel compound has good heat preservation and insulation effects. Preferably, the WBF-1 multifunctional fluidized bed is selected as the hot air fluidized bed in the step (3), the rotating speed of a fan is 1000-2500 r/min, the rotating speed of a turntable is 800-1000 r/min, and the heating temperature is 95-98 ℃; and the pH value of the acid environment is controlled to be 4-5.
According to the invention, loose closed-cell spherical composite particles are dispersed in the aqueous polyurethane liquid to prepare the thermal-insulation modified dispersion liquid, and then the thermal-insulation modified dispersion liquid is impregnated on the surface of the textile fabric, so that the aqueous polyurethane liquid can improve the hand feeling, crease resistance and shrinkage resistance of the textile fabric, and more importantly, a thermal-insulation layer which is formed by loose particles and has a very thin, loose and good thermal-insulation effect can be formed on the surface of the textile fabric. In the present invention, the aqueous polyurethane liquid in the step (4) is preferably an aqueous polyurethane dispersion GS having a mass concentration of 50 to 60%.
In the present invention, the viscosity adjusted with ethanol in the step (4) is preferably 1000 to 2000 cP.
In order to facilitate the formation of a light, thin and loose thermal insulation layer on the surface of the textile, the textile fabric is firstly subjected to corona treatment, and the corona treatment can effectively change the surface energy of the textile fabric, so that the thermal insulation modified dispersion liquid is easy to adhere to the textile fabric better. Preferably, the corona treatment device in the step (5) is a CW1000 type high-efficiency electron impact machine, the current intensity of the corona treatment is 14-15A, and the treatment speed is 10-15 m/min.
Through the padding process, the warm-keeping modified dispersion liquid can better form a warm-keeping layer on the surface of the textile fabric. And (5) the padding treatment in the step (5) has the treatment speed of 8-12 m/min and the rolling allowance rate of 65-75%.
The light and thin warm-keeping textile obtained by the method has an extremely thin and loose warm-keeping layer on the surface, and is good in warm-keeping effect, good in light and thin effect and comfortable in surface. The heat preservation performance of the textile is tested by a GB/T11048-2008A type instrument-evaporation plate method, and the heat preservation rate reaches more than 40%.
The invention provides a method for processing a light and thin warm-keeping textile, which comprises the steps of uniformly grinding cellulose, sodium bicarbonate, silicon dioxide aerogel and a small amount of cellulose ether to form a compound; then sending the compound into a fluidized bed to enable compound particles to be suspended in gas fluid, and spraying amino silicone elastic emulsion to enable the emulsion to be uniformly coated on the surfaces of the compound particles; feeding the emulsion-coated compound particles into a hot air fluidized bed, and spraying citric acid solution; the emulsion coating film is solidified under the acid environment and the heating condition of citric acid to form an elastic film, and simultaneously, sodium bicarbonate in the composite particles generates gas foaming to enable the particles to be fluffy and expanded to form loose spherical particles coated by the amino silicone elastic film; dispersing the loose spherical particles in aqueous polyurethane liquid, and adjusting the viscosity by using ethanol to obtain a warm-keeping modified dispersion liquid; and (3) carrying out corona treatment on the textile fabric, soaking the textile fabric in the heat preservation modified dispersion liquid, carrying out treatment on a finishing padding machine, and drying.
The invention provides a method for processing light and thin warm-keeping textiles, which has the prominent characteristics and excellent effects compared with the prior art:
1. a method for preparing light and thin warm-keeping textile by forming a light and thin loose heat-insulation layer on the surface of textile cloth is provided.
2. The prepared coating is an amino silicone elastic membrane, the inner core is a foamed loose cellulose and silicon dioxide aerogel compound, the compound is dispersed in polyurethane liquid and is impregnated on the surface of the textile, and finally, an extremely thin and loose heat-insulating layer consisting of loose particles is formed on the surface of the textile.
3. The preparation method is simple in preparation process, convenient to operate and extremely good in application prospect.
Drawings
FIG. 1 is a schematic view of a lightweight, thin, warm-keeping textile made according to the present invention; wherein: 1 is textile fabric base cloth; 2 is the envelope of loose spherical particles; 3 is the inner core of loose spherical particles.
Fig. 2 is a schematic diagram of loose spherical particles with uniformly distributed insulating layers of the light and thin thermal insulation textile prepared by the invention.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but it should not be construed that the scope of the present invention is limited to the following examples. Various substitutions and alterations can be made by those skilled in the art and by conventional means without departing from the spirit of the method of the invention described above.
Example 1
(1) Firstly, adding cellulose, sodium bicarbonate, silicon dioxide aerogel and cellulose ether into grinding equipment, and then grinding and uniformly mixing to obtain a compound; the average particle size of the silica aerogel is 12 mu m; the cellulose ether is methyl cellulose ether;
the raw materials comprise, by weight, 93 parts of cellulose, 2 parts of sodium bicarbonate, 3 parts of silica aerogel and 0.5 part of cellulose ether;
(2) feeding the compound obtained in the step (1) into a fluidized bed, suspending compound particles in gas fluid, and spraying amino silicone elastic emulsion to uniformly coat the emulsion on the surfaces of the compound particles to prepare emulsion-coated compound particles; the amino silicone elastic emulsion adopts 15 percent of Oscel-303 by mass concentration;
the raw materials comprise 82 parts of compound and 15 parts of amino silicone elastic emulsion by weight;
(3) feeding the composite particles coated with the emulsion prepared in the step (2) into a hot airflow fluidized bed, and spraying citric acid solution to react the composite particles coated with the emulsion for 20min under an acid environment and a heating condition to prepare loose spherical particles coated with the amino silicone elastic membrane; the hot air fluidized bed is a WBF-1 multifunctional fluidized bed, the rotating speed of a fan is 1000r/min, the rotating speed of a turntable is 800r/min, and the heating temperature is 95 ℃; controlling the pH value of the acid environment to be 5;
(4) dispersing the loose spherical particles prepared in the step (3) in aqueous polyurethane liquid, adding ethanol to adjust viscosity, and dispersing uniformly to obtain a warm-keeping modified dispersion liquid; the aqueous polyurethane liquid is aqueous polyurethane dispersion GS with the mass concentration of 50 percent; the viscosity adjusted with ethanol was 1000 cP;
the raw materials comprise, by weight, 15 parts of loose spherical particles and 80 parts of aqueous polyurethane liquid;
(5) firstly, carrying out corona treatment on the textile fabric, then soaking the textile fabric in the thermal-insulation modified dispersion liquid prepared in the step (4) for 5min, carrying out padding treatment on the textile fabric on a finishing padding machine, and finally drying the textile fabric at the temperature of 80 ℃ to obtain a light and thin thermal-insulation textile; the equipment for corona treatment adopts a CW1000 type high-efficiency electronic impact machine, the current intensity of the corona treatment is 14A, and the treatment vehicle speed is 15 m/min; the padding processing speed is 12m/min, and the rolling residual rate is controlled at 65%.
The heat preservation rate of the light and thin thermal textile prepared in example 1 is shown in table 1.
Example 2
(1) Firstly, adding cellulose, sodium bicarbonate, silicon dioxide aerogel and cellulose ether into grinding equipment, and then grinding and uniformly mixing to obtain a compound; the average particle size of the silica aerogel is 20 μm; the cellulose ether is hydroxypropyl methyl cellulose ether;
the raw materials comprise, by weight, 90 parts of cellulose, 5 parts of sodium bicarbonate, 6 parts of silica aerogel and 1 part of cellulose ether;
(2) feeding the compound obtained in the step (1) into a fluidized bed, suspending compound particles in gas fluid, and spraying amino silicone elastic emulsion to uniformly coat the emulsion on the surfaces of the compound particles to prepare emulsion-coated compound particles; the amino silicone elastic emulsion adopts 20 percent of Oscel-303 by mass concentration;
the raw materials comprise 89 parts of compound and 8 parts of amino silicone elastic emulsion by weight;
(3) feeding the composite particles coated with the emulsion prepared in the step (2) into a hot airflow fluidized bed, and spraying citric acid solution to react the composite particles coated with the emulsion for 40min under an acid environment and a heating condition to prepare loose spherical particles coated with the amino silicone elastic membrane; the hot air fluidized bed is a WBF-1 multifunctional fluidized bed, the rotating speed of a fan is 2500r/min, the rotating speed of a turntable is 1000r/min, and the heating temperature is 98 ℃; controlling the pH value of the acid environment to be 4;
(4) dispersing the loose spherical particles prepared in the step (3) in aqueous polyurethane liquid, adding ethanol to adjust viscosity, and dispersing uniformly to obtain a warm-keeping modified dispersion liquid; the aqueous polyurethane liquid is aqueous polyurethane dispersion GS with the mass concentration of 60 percent; the viscosity adjusted with ethanol was 2000 cP;
the raw materials comprise, by weight, 35 parts of loose spherical particles and 50 parts of aqueous polyurethane liquid;
(5) firstly, carrying out corona treatment on the textile fabric, then soaking the textile fabric in the thermal-insulation modified dispersion liquid prepared in the step (4) for 10min, carrying out padding treatment on the textile fabric on a finishing padding machine, and finally drying the textile fabric at the temperature of 90 ℃ to obtain a light and thin thermal-insulation textile; the equipment for corona treatment adopts a CW1000 type high-efficiency electronic impact machine, the current intensity of the corona treatment is 15A, and the treatment speed is 10 m/min; the padding processing vehicle speed is 8m/min, and the rolling residual rate is controlled at 75%.
The heat preservation rate of the light and thin thermal textile prepared in example 2 is shown in table 1.
Example 3
(1) Firstly, adding cellulose, sodium bicarbonate, silicon dioxide aerogel and cellulose ether into grinding equipment, and then grinding and uniformly mixing to obtain a compound; the average particle size of the silica aerogel is 12 mu m; the cellulose ether is ethyl cellulose ether;
the raw materials comprise, by weight, 92 parts of cellulose, 1 part of sodium bicarbonate, 4 parts of silica aerogel and 0.6 part of cellulose ether;
(2) feeding the compound obtained in the step (1) into a fluidized bed, suspending compound particles in gas fluid, and spraying amino silicone elastic emulsion to uniformly coat the emulsion on the surfaces of the compound particles to prepare emulsion-coated compound particles; the amino silicone elastic emulsion adopts 16 percent of Oscel-303 by mass concentration;
the raw materials comprise, by weight, 84 parts of a compound and 13 parts of amino silicone elastic emulsion;
(3) feeding the composite particles coated with the emulsion prepared in the step (2) into a hot airflow fluidized bed, and spraying citric acid solution to react the composite particles coated with the emulsion for 25min under an acid environment and a heating condition to prepare loose spherical particles coated with the amino silicone elastic membrane; the hot air fluidized bed is a WBF-1 multifunctional fluidized bed, the rotating speed of a fan is 1200r/min, the rotating speed of a turntable is 850r/min, and the heating temperature is 96 ℃; controlling the pH value of the acid environment to be 5;
(4) dispersing the loose spherical particles prepared in the step (3) in aqueous polyurethane liquid, adding ethanol to adjust viscosity, and dispersing uniformly to obtain a warm-keeping modified dispersion liquid; the aqueous polyurethane liquid is aqueous polyurethane dispersion GS with the mass concentration of 52 percent; the viscosity adjusted with ethanol was 1200 cP;
the raw materials comprise, by weight, 20 parts of loose spherical particles and 70 parts of aqueous polyurethane liquid;
(5) firstly, carrying out corona treatment on the textile fabric, then soaking the textile fabric in the thermal-insulation modified dispersion liquid prepared in the step (4) for 6min, carrying out padding treatment on the textile fabric on a finishing padding machine, and finally drying the textile fabric at 82 ℃ to obtain a light and thin thermal-insulation textile; the equipment for corona treatment adopts a CW1000 type high-efficiency electronic impact machine, the current intensity of the corona treatment is 14A, and the treatment vehicle speed is 14 m/min; the processing speed of padding processing is 11m/min, and the rolling residual rate is controlled at 68%.
The heat preservation rate of the light and thin thermal textile prepared in example 3 is shown in table 1.
Example 4
(1) Firstly, adding cellulose, sodium bicarbonate, silicon dioxide aerogel and cellulose ether into grinding equipment, and then grinding and uniformly mixing to obtain a compound; the average particle size of the silica aerogel is 18 mu m; the cellulose ether is hydroxyethyl cellulose ether;
the raw materials comprise, by weight, 91 parts of cellulose, 4 parts of sodium bicarbonate, 5 parts of silica aerogel and 0.8 part of cellulose ether;
(2) feeding the compound obtained in the step (1) into a fluidized bed, suspending compound particles in gas fluid, and spraying amino silicone elastic emulsion to uniformly coat the emulsion on the surfaces of the compound particles to prepare emulsion-coated compound particles; the amino silicone elastic emulsion adopts the Oscel-303 with the mass concentration of 18 percent;
the raw materials comprise 87 parts of compound and 10 parts of amino silicone elastic emulsion by weight;
(3) feeding the composite particles coated with the emulsion prepared in the step (2) into a hot airflow fluidized bed, and spraying citric acid solution to react the composite particles coated with the emulsion for 35min under an acid environment and a heating condition to prepare loose spherical particles coated with the amino silicone elastic membrane; the hot air fluidized bed is a WBF-1 multifunctional fluidized bed, the rotating speed of a fan is 2200r/min, the rotating speed of a turntable is 950r/min, and the heating temperature is 97 ℃; controlling the pH value of the acid environment to be 4;
(4) dispersing the loose spherical particles prepared in the step (3) in aqueous polyurethane liquid, adding ethanol to adjust viscosity, and dispersing uniformly to obtain a warm-keeping modified dispersion liquid; the aqueous polyurethane liquid is aqueous polyurethane dispersion GS with the mass concentration of 58%; the viscosity adjusted with ethanol was 180 cP;
the raw materials comprise, by weight, 30 parts of loose spherical particles and 60 parts of aqueous polyurethane liquid;
(5) firstly, carrying out corona treatment on the textile fabric, then soaking the textile fabric in the thermal-insulation modified dispersion liquid prepared in the step (4) for 9min, carrying out padding treatment on the textile fabric on a finishing padding machine, and finally drying the textile fabric at the temperature of 88 ℃ to obtain a light and thin thermal-insulation textile; the equipment for corona treatment adopts a CW1000 type high-efficiency electronic impact machine, the current intensity of the corona treatment is 15A, and the treatment speed is 11 m/min; the speed of padding treatment is 9m/min, and the rolling residual rate is controlled at 72%.
The heat preservation rate of the light and thin thermal textile prepared in example 4 is shown in table 1.
Example 5
(1) Firstly, adding cellulose, sodium bicarbonate, silicon dioxide aerogel and cellulose ether into grinding equipment, and then grinding and uniformly mixing to obtain a compound; the average particle size of the silica aerogel is 14 μm; the cellulose ether is hydroxypropyl cellulose ether;
the raw materials comprise, by weight, 91 parts of cellulose, 3 parts of sodium bicarbonate, 5 parts of silica aerogel and 0.7 part of cellulose ether;
(2) feeding the compound obtained in the step (1) into a fluidized bed, suspending compound particles in gas fluid, and spraying amino silicone elastic emulsion to uniformly coat the emulsion on the surfaces of the compound particles to prepare emulsion-coated compound particles; the amino silicone elastic emulsion adopts Oscel-303 with the mass concentration of 17 percent;
the raw materials comprise, by weight, 85 parts of a compound and 11 parts of amino silicone elastic emulsion;
(3) feeding the composite particles coated with the emulsion prepared in the step (2) into a hot airflow fluidized bed, and spraying citric acid solution to react the composite particles coated with the emulsion for 28min under an acid environment and a heating condition to prepare loose spherical particles coated with the amino silicone elastic membrane; the hot air fluidized bed is a WBF-1 multifunctional fluidized bed, the rotating speed of a fan is 1700r/min, the rotating speed of a turntable is 880r/min, and the heating temperature is 97 ℃; controlling the pH value of the acid environment to be 4.5;
(4) dispersing the loose spherical particles prepared in the step (3) in aqueous polyurethane liquid, adding ethanol to adjust viscosity, and dispersing uniformly to obtain a warm-keeping modified dispersion liquid; the aqueous polyurethane liquid is aqueous polyurethane dispersion GS with the mass concentration of 56 percent; the viscosity adjusted with ethanol was 1400 cP;
the raw materials comprise, by weight, 22 parts of loose spherical particles and 62 parts of aqueous polyurethane liquid;
(5) firstly, carrying out corona treatment on the textile fabric, then soaking the textile fabric in the thermal-insulation modified dispersion liquid prepared in the step (4) for 7min, carrying out padding treatment on the textile fabric by a finishing padding machine, and finally drying the textile fabric at the temperature of 84 ℃ to obtain a light and thin thermal-insulation textile; the equipment for corona treatment adopts a CW1000 type high-efficiency electronic impact machine, the current intensity of the corona treatment is 14A, and the treatment speed is 13 m/min; the speed of padding treatment is 11m/min, and the rolling residual rate is controlled at 69%.
The heat preservation rate of the light and thin thermal textile prepared in example 5 is shown in table 1.
Comparative example 1
Comparative example 1 no sodium bicarbonate and silica aerogel were added, and the other preparation conditions were the same as in example 5, and the insulation rates of the prepared thermal fabrics were as shown in table 1.
The performance index testing method comprises the following steps:
heat preservation rate:
the heat preservation performance of the textile is tested by referring to a GB/T11048-2008A type instrument-evaporation plate method;
in order to qualitatively compare the heat preservation performance, the textile base cloth of the test is selected from commercially available cotton cloth; the thickness of each sample is 2mm, and the size of each sample is 300mm multiplied by 300 mm;
completely covering the surfaces of a test board and a thermal protection ring by the size of a sample, wherein the size of the test board is 250mm multiplied by 250mm, and the width of the thermal protection ring is 18 mm;
empty plate value RctoAnd (3) determination: adjusting the temperature T of the surface of the test boardmAt 35 ℃ and a climatic chamber temperature TaAt 20 deg.C, relative humidity R.H. of 65%, and air flow rate VaIs 1 m/s; recording the measured value for 1 time in 3min, and the test time reaches stability in 30 min; after the measured value is stable, recording Tm, Ta, R.H. and H data; calculation of RctO=（Tm-Ta).A/（H-△Hc) Wherein, △ HcIs a correction value of the heating power; a is the area of the test plate; h is the heating power supplied to the test board;
calculating the thermal resistance: after a sample is placed on a sample plate, and after a measured value is stable, Tm, Ta, R.H. and H data are recorded; calculation of Rct=（Tm-Ta).A/（H-△Hc）-RctO；
Finally calculating the thermal insulation rate% = Rct/RctO。
Table 1:
Claims (10)
1. a treatment method of a light and thin warm-keeping textile is characterized by comprising the following specific preparation processes:
(1) firstly, adding cellulose, sodium bicarbonate, silicon dioxide aerogel and cellulose ether into grinding equipment, and then grinding and uniformly mixing to obtain a compound; the material comprises, by weight, 90-93 parts of cellulose, 2-5 parts of sodium bicarbonate, 3-6 parts of silica aerogel and 0.5-1 part of cellulose ether;
(2) feeding the compound obtained in the step (1) into a fluidized bed, suspending compound particles in gas fluid, and spraying amino silicone elastic emulsion to uniformly coat the emulsion on the surfaces of the compound particles to prepare emulsion-coated compound particles; the raw materials comprise, by weight, 82-89 parts of a compound and 8-15 parts of amino silicone elastic emulsion;
(3) feeding the composite particles coated with the emulsion prepared in the step (2) into a hot airflow fluidized bed, and spraying citric acid solution to react the composite particles coated with the emulsion for 20-40 min under an acid environment and a heating condition to prepare loose spherical particles coated with the amino silicone elastic membrane;
(4) dispersing the loose spherical particles prepared in the step (3) in aqueous polyurethane liquid, adding ethanol to adjust viscosity, and dispersing uniformly to obtain a warm-keeping modified dispersion liquid; the raw materials comprise, by weight, 15-35 parts of loose spherical particles and 50-80 parts of aqueous polyurethane liquid;
(5) and (3) carrying out corona treatment on the textile fabric, then soaking the textile fabric in the thermal-insulation modified dispersion liquid prepared in the step (4) for 5-10 min, carrying out padding treatment on the textile fabric by a finishing padding machine, and finally drying the textile fabric at the temperature of 80-90 ℃ to obtain the light and thin thermal-insulation textile.
2. The method for processing a light and thin thermal textile according to claim 1, wherein: the particle size of the silicon dioxide aerogel in the step (1) is 10-20 microns.
3. The method for processing a light and thin thermal textile according to claim 1, wherein: the cellulose ether in the step (1) is one of methyl cellulose ether, hydroxypropyl methyl cellulose ether, ethyl cellulose ether, hydroxyethyl cellulose ether, hydroxypropyl cellulose ether and hydroxymethyl cellulose ether.
4. The method for processing a light and thin thermal textile according to claim 1, wherein: and (3) selecting 15-20% of Osseo-303 by mass concentration from the amino silicone elastic emulsion in the step (2).
5. The method for processing a light and thin thermal textile according to claim 1, wherein: and (3) selecting a WBF-1 multifunctional fluidized bed as the hot air fluidized bed, wherein the rotating speed of a fan is 1000-2500 r/min, the rotating speed of a turntable is 800-1000 r/min, and the heating temperature is 95-98 ℃.
6. The method for processing a light and thin thermal textile according to claim 1, wherein: and (4) controlling the pH value of the acid environment in the step (3) to be 4-5.
7. The method for processing a light and thin thermal textile according to claim 1, wherein: the aqueous polyurethane liquid in the step (4) is aqueous polyurethane dispersion GS with the mass concentration of 50-60%.
8. The method for processing a light and thin thermal textile according to claim 1, wherein: and (4) adjusting the viscosity of the ethanol in the step (4) to be 1000-2000 cP.
9. The method for processing a light and thin thermal textile according to claim 1, wherein: and (5) selecting a CW1000 type high-efficiency electronic impact machine as the corona treatment equipment, wherein the current intensity of the corona treatment is 14-15A, and the treatment speed is 10-15 m/min.
10. The method for processing a light and thin thermal textile according to claim 1, wherein: and (5) the padding treatment in the step (5) is carried out at the speed of 8-12 m/min, and the rolling allowance rate is controlled at 65-75%.
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