Preparation method of a lightweight heat-insulating fabric for down jackets

Abstract

The present invention discloses a method for preparing a lightweight down jacket thermal insulation fabric, comprising the following steps: sending the woven grey cloth into a sodium hydroxide solution for reaction, washing and drying, immersing it in a NaIO4 solution to avoid light reaction, then treating it in a propylene glycol solution, washing and drying to obtain an oxidized grey cloth; immersing the oxidized grey cloth in a NaOH solution dissolved with β-CD, reacting it in a water bath with oscillation, thoroughly cleaning it with ionized water and drying it to obtain a grey cloth grafted with β-CD; placing the grey cloth grafted with β-CD in a solution of a terminal amino hyperbranched compound HBP-NH2 for oscillation in a water bath, washing it and freeze-drying it to obtain a modified grey cloth; applying a thermal insulation coating on the surface of the modified grey cloth, and drying it to obtain a lightweight down jacket thermal insulation fabric. The method for preparing a lightweight down jacket thermal insulation fabric of the present invention has excellent thermal insulation durability, and ensures fabric moisture permeability and yellowing resistance while achieving thermal insulation.

Description

Technical Field

[0001] The invention relates to the technical field of down jacket fabrics, and in particular to a method for preparing lightweight heat-insulating fabrics for down jackets. Background Art

[0002] Down jackets are down-filled outerwear with a large, rounded shape. With people's increasing pursuit of quality down jackets, lightweight, lightweight down jackets have become increasingly popular. However, achieving a good wearing experience requires strict control over the thermal insulation properties of down jackets. Therefore, the thermal insulation properties of the fabrics used in lightweight down jackets are highly demanding. While existing down jacket fabrics have some thermal insulation properties, the primary insulation effect is provided by the large amount of down filling inside the fabric, resulting in limited thermal insulation performance. Furthermore, the thermal insulation properties of the fabric deteriorate after repeated washing, affecting the warmth retention of the down jacket. Summary of the Invention

[0003] The main purpose of the present invention is to provide a method for preparing a lightweight down jacket thermal insulation fabric, which can effectively solve the problems in the background technology.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A method for preparing a lightweight down jacket thermal insulation fabric comprises the following steps:

[0006] Step S1, weaving flax fiber and cotton fiber in warp and weft to obtain a woven grey cloth;

[0007] Step S2, the woven grey fabric is placed in a sodium hydroxide solution with a mass fraction of 18% for reaction for 2 hours, washed and dried, and the alkali-activated grey fabric is immersed in a NaIO4 solution at a bath ratio of 1:50 for reaction in the dark for 1-1.5 hours, and then treated in a 0.1 mol / L glycerol solution for 12 hours. After washing with deionized water, it is placed in an oven at 60-85°C for drying to obtain the oxidized grey fabric;

[0008] Step S3, immersing the oxidized grey cloth in a NaOH solution containing β-CD, shaking the solution in a water bath, and then washing the solution with ionized water and drying the solution to obtain the grey cloth grafted with β-CD;

[0009] Step S4, placing the β-CD grafted fabric in a solution of an amino-terminated hyperbranched compound HBP-NH2 for oscillation reaction in a water bath, washing thoroughly with ionized water, and freeze-drying to obtain a modified fabric;

[0010] Step S5: coating the surface of the modified grey fabric with a heat-insulating coating, and drying the coating to obtain a lightweight down jacket heat-insulating fabric;

[0011] As a further optimized solution of the present invention, the weight ratio of flax fiber to cotton fiber in step S1 is 1:(3-5).

[0012] As a further optimization solution of the present invention, the concentration of the NaIO4 solution in step S2 is 6 g / L.

[0013] As a further optimization solution of the present invention, the mass fraction of the NaOH solution in step S3 is 20%-30%.

[0014] As a further optimization solution of the present invention, the mass ratio of the oxidized grey cloth to β-CD in step S3 is 1:(1.5-2).

[0015] As a further optimization solution of the present invention, the bath oscillation reaction temperature in step S3 and step S4 is 45° C., and the reaction temperature is 2-3 hours.

[0016] As a further optimized solution of the present invention, the concentration of the amino-terminated hyperbranched compound HBP-NH2 solution in step S4 is 20-30 g / L.

[0017] As a further optimized solution of the present invention, the thermal insulation coating is composed of the following components in parts by weight: 100 parts of oily polyurethane, 5-10 parts of adhesive, 25-30 parts of flame retardant, 15-20 parts of butanone and 7-12 parts of titanium dioxide.

[0018] As a further optimized solution of the present invention, the flame retardant is a cyclized phosphate flame retardant, and the adhesive is an ARONCERAMIC phosphate adhesive.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, sodium hydroxide, NaIO4 solution, glycerol solution, β-CD and amino-terminated hyperbranched compound HBP-NH2 solution are used to activate, oxidize and graft the fabric woven from flax fiber and cotton fiber to achieve the modification of the grey cloth. Not only is the thermal insulation performance of the modified fabric improved, but the thermal insulation coating absorbed inside the fiber of the fabric is replenished to the outside after multiple washings, thereby ensuring the thermal insulation durability of the fabric.

[0021] 2. In the present invention, titanium dioxide is added to the thermal insulation coating, so that the thermal insulation coating with titanium dioxide is coated on the modified grey cloth. The thermal insulation coating with titanium dioxide ensures the thermal insulation effect of the fabric while making the fabric have good moisture permeability, which can effectively prevent the fabric from fading and yellowing or the problem of decreased moisture permeability after repeated washing, thereby improving the yellowing resistance of the fabric. DETAILED DESCRIPTION

[0022] The present application is described in further detail below. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0023] Example 1

[0024] A method for preparing a lightweight down jacket thermal insulation fabric comprises the following steps:

[0025] Step S1, weaving flax fiber and cotton fiber in a weight ratio of 1:4 by warp and weft to obtain a woven grey cloth;

[0026] Step S2, the woven grey fabric is placed in a sodium hydroxide solution with a mass fraction of 18% for reaction for 2 hours, washed and dried, and the alkali-activated grey fabric is immersed in a NaIO4 solution with a concentration of 6 g / L at a bath ratio of 1:50 in the dark for reaction for 1.2 hours, and then treated in a 0.1 mol / L glycerol solution for 12 hours. After washing with deionized water, it is placed in an oven at 60-85°C for drying to obtain the oxidized grey fabric;

[0027] Step S3, immersing the oxidized grey cloth in a NaOH solution containing β-CD, shaking the solution in a water bath at 45°C for 2 hours, thoroughly washing with deionized water, and drying the solution to obtain a grey cloth grafted with β-CD, wherein the mass ratio of the oxidized grey cloth to β-CD is 1:1.8;

[0028] Step S4, placing the β-CD grafted fabric in a 20 g / L amino-terminated hyperbranched compound HBP-NH2 solution in a 45°C water bath for 2 h of shaking reaction, washing thoroughly with deionized water, and freeze-drying to obtain a modified fabric;

[0029] Step S5: applying a thermal insulation coating on the surface of the modified grey fabric, and obtaining a lightweight down jacket thermal insulation fabric after drying, wherein the thermal insulation coating is composed of the following components in parts by weight: 100 parts of oily polyurethane, 5 parts of adhesive, 25 parts of flame retardant, 15 parts of butanone, and 7 parts of titanium dioxide, wherein the flame retardant is a cyclized phosphate flame retardant, and the adhesive is ARON CERAMIC phosphate adhesive.

[0030] Example 2

[0031] A method for preparing a lightweight down jacket thermal insulation fabric comprises the following steps:

[0032] Step S1, weaving flax fiber and cotton fiber in a weight ratio of 1:4 by warp and weft to obtain a woven grey cloth;

[0033] Step S2, the woven grey fabric is placed in a sodium hydroxide solution with a mass fraction of 18% for reaction for 2 hours, washed and dried, and the alkali-activated grey fabric is immersed in a NaIO4 solution with a concentration of 6 g / L at a bath ratio of 1:50 in the dark for reaction for 1.2 hours, and then treated in a 0.1 mol / L glycerol solution for 12 hours. After washing with deionized water, it is placed in an oven at 60-85°C for drying to obtain the oxidized grey fabric;

[0034] Step S3, immersing the oxidized grey cloth in a NaOH solution containing β-CD, shaking the solution in a water bath at 45°C for 2 hours, thoroughly washing with deionized water, and drying the solution to obtain a grey cloth grafted with β-CD, wherein the mass ratio of the oxidized grey cloth to β-CD is 1:1.8;

[0035] Step S4, placing the β-CD grafted fabric in a 20 g / L amino-terminated hyperbranched compound HBP-NH2 solution in a 45°C water bath for 2 h of shaking reaction, washing thoroughly with deionized water, and freeze-drying to obtain a modified fabric;

[0036] Step S5: applying a thermal insulation coating on the surface of the modified grey fabric, and obtaining a lightweight down jacket thermal insulation fabric after drying, wherein the thermal insulation coating is composed of the following components in parts by weight: 100 parts of oily polyurethane, 10 parts of adhesive, 30 parts of flame retardant, 20 parts of butanone, and 12 parts of titanium dioxide, the flame retardant is a cyclized phosphate flame retardant, and the adhesive is ARON CERAMIC phosphate adhesive.

[0037] Example 3

[0038] A method for preparing a lightweight down jacket thermal insulation fabric comprises the following steps:

[0039] Step S1, weaving flax fiber and cotton fiber in a weight ratio of 1:4 by warp and weft to obtain a woven grey cloth;

[0040] Step S2, the woven grey fabric is placed in a sodium hydroxide solution with a mass fraction of 18% for reaction for 2 hours, washed and dried, and the alkali-activated grey fabric is immersed in a NaIO4 solution with a concentration of 6 g / L at a bath ratio of 1:50 in the dark for reaction for 1.2 hours, and then treated in a 0.1 mol / L glycerol solution for 12 hours. After washing with deionized water, it is placed in an oven at 60-85°C for drying to obtain the oxidized grey fabric;

[0041] Step S3, immersing the oxidized grey cloth in a NaOH solution containing β-CD, shaking the solution in a water bath at 45°C for 2 hours, thoroughly washing with deionized water, and drying the solution to obtain a grey cloth grafted with β-CD, wherein the mass ratio of the oxidized grey cloth to β-CD is 1:1.8;

[0042] Step S4, placing the β-CD grafted fabric in a 20 g / L amino-terminated hyperbranched compound HBP-NH2 solution in a 45°C water bath for 2 h of shaking reaction, washing thoroughly with deionized water, and freeze-drying to obtain a modified fabric;

[0043] Step S5: applying a thermal insulation coating on the surface of the modified grey fabric, and obtaining a lightweight down jacket thermal insulation fabric after drying, wherein the thermal insulation coating is composed of the following components in parts by weight: 100 parts of oily polyurethane, 8 parts of adhesive, 28 parts of flame retardant, 18 parts of butanone, and 10 parts of titanium dioxide, wherein the flame retardant is a cyclized phosphate flame retardant, and the adhesive is ARON CERAMIC phosphate adhesive.

[0044] Example 4

[0045] A method for preparing a lightweight down jacket thermal insulation fabric comprises the following steps:

[0046] Step S1, weaving flax fiber and cotton fiber in a weight ratio of 1:4 by warp and weft to obtain a woven grey cloth;

[0047] Step S2, the woven grey fabric is placed in a sodium hydroxide solution with a mass fraction of 18% for reaction for 2 hours, washed and dried, and the alkali-activated grey fabric is immersed in a NaIO4 solution with a concentration of 6 g / L at a bath ratio of 1:50 in the dark for reaction for 1.2 hours, and then treated in a 0.1 mol / L glycerol solution for 12 hours. After washing with deionized water, it is placed in an oven at 60-85°C for drying to obtain the oxidized grey fabric;

[0048] Step S3, immersing the oxidized grey cloth in a NaOH solution containing β-CD, shaking the solution in a water bath at 45°C for 2 hours, thoroughly washing with deionized water, and drying the solution to obtain a grey cloth grafted with β-CD, wherein the mass ratio of the oxidized grey cloth to β-CD is 1:1.8;

[0049] Step S4, placing the β-CD grafted fabric in a 30 g / L amino-terminated hyperbranched compound HBP-NH2 solution in a 45°C water bath for 2 h of shaking reaction, washing thoroughly with deionized water, and freeze-drying to obtain a modified fabric;

[0050] Step S5: applying a thermal insulation coating on the surface of the modified grey fabric, and obtaining a lightweight down jacket thermal insulation fabric after drying, wherein the thermal insulation coating is composed of the following components in parts by weight: 100 parts of oily polyurethane, 8 parts of adhesive, 28 parts of flame retardant, 18 parts of butanone, and 10 parts of titanium dioxide, wherein the flame retardant is a cyclized phosphate flame retardant, and the adhesive is ARON CERAMIC phosphate adhesive.

[0051] Example 5

[0052] A method for preparing a lightweight down jacket thermal insulation fabric comprises the following steps:

[0053] Step S1, weaving flax fiber and cotton fiber in a weight ratio of 1:4 by warp and weft to obtain a woven grey cloth;

[0054] Step S2, the woven grey fabric is placed in a sodium hydroxide solution with a mass fraction of 18% for reaction for 2 hours, washed and dried, and the alkali-activated grey fabric is immersed in a NaIO4 solution with a concentration of 6 g / L at a bath ratio of 1:50 in the dark for reaction for 1.2 hours, and then treated in a 0.1 mol / L glycerol solution for 12 hours. After washing with deionized water, it is placed in an oven at 60-85°C for drying to obtain the oxidized grey fabric;

[0055] Step S3, immersing the oxidized grey cloth in a NaOH solution containing β-CD, shaking the solution in a water bath at 45°C for 2 hours, thoroughly washing with deionized water, and drying the solution to obtain a grey cloth grafted with β-CD, wherein the mass ratio of the oxidized grey cloth to β-CD is 1:1.8;

[0056] Step S4, placing the β-CD grafted fabric in a 25 g / L amino-terminated hyperbranched compound HBP-NH2 solution in a 45°C water bath for 2 h, washing thoroughly with deionized water, and freeze-drying to obtain a modified fabric;

[0057] Step S5: applying a thermal insulation coating on the surface of the modified grey fabric, and obtaining a lightweight down jacket thermal insulation fabric after drying, wherein the thermal insulation coating is composed of the following components in parts by weight: 100 parts of oily polyurethane, 8 parts of adhesive, 28 parts of flame retardant, 18 parts of butanone, and 10 parts of titanium dioxide, wherein the flame retardant is a cyclized phosphate flame retardant, and the adhesive is ARON CERAMIC phosphate adhesive.

[0058] Comparative Example 1

[0059] A method for preparing a lightweight down jacket thermal insulation fabric comprises the following steps:

[0060] Step S1, weaving flax fiber and cotton fiber in a weight ratio of 1:4 by warp and weft to obtain a woven grey cloth;

[0061] Step S2: applying a thermal insulation coating on the surface of the grey fabric, and drying the coating to obtain a lightweight down jacket thermal insulation fabric, wherein the thermal insulation coating is composed of the following components in parts by weight: 100 parts of oily polyurethane, 8 parts of adhesive, 28 parts of flame retardant, 18 parts of butanone, and 10 parts of titanium dioxide, wherein the flame retardant is a cyclized phosphate flame retardant, and the adhesive is ARON CERAMIC phosphate adhesive.

[0062] Comparative Example 2

[0063] A method for preparing a lightweight down jacket thermal insulation fabric comprises the following steps:

[0064] Step S1, weaving flax fiber and cotton fiber in a weight ratio of 1:4 by warp and weft to obtain a woven grey cloth;

[0065] Step S2, the woven grey fabric is placed in a sodium hydroxide solution with a mass fraction of 18% for reaction for 2 hours, washed and dried, and the alkali-activated grey fabric is immersed in a NaIO4 solution with a concentration of 6 g / L at a bath ratio of 1:50 in the dark for reaction for 1.2 hours, and then treated in a 0.1 mol / L glycerol solution for 12 hours. After washing with deionized water, it is placed in an oven at 60-85°C for drying to obtain the oxidized grey fabric;

[0066] Step S3, immersing the oxidized grey cloth in a NaOH solution containing β-CD, shaking the solution in a water bath at 45°C for 2 hours, thoroughly washing with deionized water, and drying the solution to obtain a grey cloth grafted with β-CD, wherein the mass ratio of the oxidized grey cloth to β-CD is 1:1.8;

[0067] Step S4, placing the β-CD grafted fabric in a 25 g / L amino-terminated hyperbranched compound HBP-NH2 solution in a 45°C water bath for 2 h, washing thoroughly with deionized water, and freeze-drying to obtain a modified fabric;

[0068] Step S5: applying a thermal insulation coating on the surface of the modified grey fabric, and obtaining a lightweight down jacket thermal insulation fabric after drying, wherein the thermal insulation coating is composed of the following components in parts by weight: 110 parts of oily polyurethane, 8 parts of adhesive, 28 parts of flame retardant, and 18 parts of butanone, wherein the flame retardant is a cyclized phosphate flame retardant, and the adhesive is ARON CERAMIC phosphate adhesive.

[0069] According to the above examples 1-5 and comparative examples 1-2 and the preparation method, thermal insulation fabrics were prepared respectively to obtain a thermal insulation fabric with an area of 400 cm 2 Seven groups of samples were washed 50 times, and the thermal insulation performance, moisture permeability and yellowing resistance of each group of thermal insulation fabrics before and after washing were tested, including: (1) the thermal insulation performance of the thermal insulation fabrics was tested according to the GB / T11048 standard method; (2) the moisture permeability test was tested according to the national standard GB / T12704-1991; (3) the thermal insulation fabrics were tested for yellowing resistance, and the fabrics were rated for yellowing resistance by touch using a 5-person rating method. The lower the yellowing resistance level, the worse the yellowing resistance of the fabric, and the higher the yellowing resistance level, the better the yellowing resistance of the fabric. The test results are as follows:

[0070]

[0071] Based on the above experimental data, the following conclusions are drawn:

[0072] It can be seen from the data of Examples 1-4 that the thermal conductivity coefficients of the fabrics of Examples 1-4 are all below 0.28, and the thermal conductivity coefficient of the fabric of Example 5 even reaches 0.24, the thermal insulation performance reaches the best, and the thermal insulation performance of the fabric does not change significantly before and after washing. The thermal conductivity coefficient of the thermal insulation fabric in Comparative Example 1 reaches 0.35 before washing, and the thermal conductivity coefficient of the fabric after washing is greatly increased. It can be seen that the thermal insulation performance of the thermal insulation fabric in Example 5 is improved compared with the fabric in Comparative Example 2, and the fabric still has good thermal insulation performance after multiple washings; and the moisture permeability of the thermal insulation fabrics corresponding to Examples 1-5 is ≥10000 g / (m2d) before and after washing, among which the moisture permeability in Example 5 is the highest. Compared with Example 2, the moisture permeability of the fabric in Example 5 is greatly improved. It can be seen from Example 5 and Comparative Example 2 that the thermal insulation coating added with titanium dioxide not only makes the fabric have good moisture permeability, but also effectively prevents the fabric from fading and yellowing, thereby improving the yellowing resistance of the fabric.

[0073] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a lightweight down jacket thermal insulation fabric, characterized by: The following steps are involved: Step S1, weaving flax fiber and cotton fiber in warp and weft to obtain a woven grey cloth; Step S2, the woven grey fabric is placed in a sodium hydroxide solution with a mass fraction of 18% for reaction for 2 hours, washed and dried, and the alkali-activated grey fabric is immersed in a NaIO4 solution at a bath ratio of 1:50 for reaction in the dark for 1-1.5 hours, and then treated in a 0.1 mol / L glycerol solution for 12 hours. After washing with deionized water, it is placed in an oven at 60-85°C for drying to obtain the oxidized grey fabric; Step S3, immersing the oxidized grey cloth in a NaOH solution containing β-CD, shaking the solution in a water bath, and then washing the solution with ionized water and drying the solution to obtain the grey cloth grafted with β-CD; Step S4, placing the β-CD grafted fabric in a solution of an amino-terminated hyperbranched compound HBP-NH2 for oscillation reaction in a water bath, washing thoroughly with ionized water, and freeze-drying to obtain a modified fabric; Step S5: coating the surface of the modified grey fabric with a heat-insulating coating, and drying the coating to obtain a lightweight down jacket heat-insulating fabric; The thermal insulation coating is composed of the following components in parts by weight: 100 parts of oily polyurethane, 5-10 parts of adhesive, 25-30 parts of flame retardant, 15-20 parts of butanone and 7-12 parts of titanium dioxide; In step S1, the weight ratio of flax fiber to cotton fiber is 1:(3-5); The mass ratio of the oxidized grey cloth to β-CD in step S3 is 1:(1.5-2); The flame retardant is a cyclized phosphate flame retardant, and the adhesive is ARON CERAMIC phosphate adhesive.

2. The method for preparing a lightweight thermal insulation fabric for down jackets according to claim 1, characterized in that: The concentration of the NaIO4 solution in step S2 is 6 g / L.

3. The method for preparing a lightweight thermal insulation fabric for down jackets according to claim 1, characterized in that: The mass fraction of the NaOH solution in step S3 is 20%-30%.

4. The method for preparing a lightweight thermal insulation fabric for down jackets according to claim 1, characterized in that: The water bath oscillation reaction temperature in step S3 and step S4 is 45° C., and the reaction time is 2-3 hours.

5. The method for preparing a lightweight thermal insulation fabric for down jackets according to claim 1, characterized in that: In step S4, the concentration of the amino-terminated hyperbranched compound HBP-NH2 solution is 20-30 g / L.

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