Down fiber thermal insulation material and compounding method thereof
By modifying down fiber powder and compounding it with isotactic polypropylene and polyurethane, porous composite fibers were prepared. This solved the problem of poor bonding between down powder and the substrate, improved the thermal insulation and moisture resistance of the insulation material, and achieved efficient utilization of down fibers.
Patent Information
- Application Number
- CN202510944559.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-09
- Publication Date
- 2025-10-24
AI Technical Summary
In the existing technology for producing down insulation materials, the bonding effect between down powder and base material and the hydrophilic properties of down affect the thermal insulation properties, resulting in poor performance of the insulation material and the failure to effectively utilize the substandard down.
Modified down fiber powder, isotactic polypropylene and polyurethane are used as raw materials. Porous composite fibers are prepared by melt spinning technology. The down fiber powder is modified with 2,3-epoxypropyltrimethylammonium chloride and caprylic acid to adjust its hydrophilicity and dispersion uniformity and improve the adhesion strength.
The prepared porous composite fiber has good thermal insulation and moisture resistance, and the water washing resistance is significantly improved. The dispersion uniformity and adhesion strength of the down fiber powder in the substrate are improved, and the overall performance is better than that of the unmodified material.
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of thermal insulation material production, and particularly relates to a down fiber thermal insulation material and a composite method thereof. BACKGROUND
[0002] Down fibers are widely used in the textile industry due to their good heat insulation properties, and the most common application method is to use them as fillers to produce down jackets, down quilts and other daily thermal insulation products. In the process of producing down products, in order to maintain or improve the thermal insulation effect of down fibers, factors such as the porosity, filling amount, fiber integrity and loftiness of down fibers need to be considered. Therefore, in the actual production process, a large amount of substandard down is not effectively utilized. In order to avoid the waste of the use value of such down, the prior art processes the down into a powder form for use in the production of thermal insulation materials. However, in the production of such thermal insulation materials, the combination effect of the down powder and the base material and the hydrophilic properties of the down itself will directly or indirectly affect the thermal insulation properties of the thermal insulation material. In order to fully utilize the thermal insulation effect of the down fiber powder contained in the thermal insulation material, the application provides a down fiber thermal insulation material and a composite method thereof. SUMMARY
[0003] The application aims to provide a down fiber thermal insulation material and a composite method thereof to solve the above problems.
[0004] The application achieves the above-mentioned purpose through the following technical solutions: The application provides a down fiber thermal insulation material, which is a porous composite fiber prepared by melt spinning technology. The raw material composition includes modified down fiber powder, isotactic polypropylene and polyurethane. The modified down fiber powder is obtained by modifying the down fiber powder with 2,3-epoxypropyltrimethylammonium chloride and caproic acid.
[0005] As a further optimization scheme of the application, the mass ratio of the modified down fiber powder, isotactic polypropylene and polyurethane in the raw material of the composite fiber is 1:4:7.
[0006] As a further optimization scheme of the application, the raw material composition of the modification liquid used by the down fiber powder includes 3-5 parts of 2,3-epoxypropyltrimethylammonium chloride, 5-8 parts of caproic acid and 20-25 parts of diethyl ether.
[0007] The application further provides a composite method of a down fiber thermal insulation material, which includes the following steps: S1, the down fibers are sequentially subjected to degreasing, cleaning, crushing, drying and grinding treatment to obtain down fiber powder; S2, dissolve 2, 3-epoxypropyl trimethyl ammonium chloride and caproic acid in an ethyl ether solution to obtain a modified liquid, put down feather fiber powder into the modified liquid, and then sequentially perform ultrasonic dispersion, filtration and drying treatment to obtain modified down feather fiber powder; S3, uniformly mix the modified down feather fiber powder, isotactic polypropylene and polyurethane to obtain a spinning melt, and process the spinning melt into a composite fiber by melt spinning technology; S4, perform impregnation treatment on the composite fiber by using N-methyl pyrrolidone at 70 DEG C, and the treatment time is 48h to obtain a porous composite fiber.
[0008] As a further optimization scheme of the present application, in S2, the mass ratio of the down feather fiber powder to the modified liquid is 1:40.
[0009] As a further optimization scheme of the present application, in S1, the average particle size of the obtained down feather fiber powder is 2-3um.
[0010] As a further optimization scheme of the present application, in S3, the temperature during the melt spinning treatment is 180 DEG C, and the drawing speed is 2m / min.
[0011] The present application has the following advantages: The present application uses a modified liquid containing 2, 3-epoxypropyl trimethyl ammonium chloride and caproic acid to modify the down feather fiber processed into powder, and then uses the modified down feather fiber powder, isotactic polypropylene and polyurethane as raw materials to prepare a porous composite fiber. On the one hand, the down feather fiber powder gives the porous composite fiber good thermal insulation, and on the other hand, the modification adjusts the hydrophilicity of the down feather fiber powder and indirectly affects the dispersion uniformity and adhesion strength of the down feather fiber powder in the isotactic polypropylene, so that the porous composite fiber also has good moisture resistance and better washing resistance. DETAILED DESCRIPTION
[0012] The following further describes the present application, and it is necessary to point out here that the following detailed description is only used to further illustrate the present application, and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.
[0013] I. Materials The methods used in the present application are conventional methods known to those skilled in the art, and the reagents and materials used are commercially available products, unless otherwise specified.
[0014] The isotactic polypropylene used in the present application is F401 type from Yangzi Petrochemical; The polyurethane used is 3385AU DPS301 from Covestro, Germany.
[0015] II. Method Example 1 A down fiber thermal insulation material, a composite method thereof comprises the following steps: S1, the down fiber is sequentially subjected to degreasing, cleaning, crushing, drying and grinding treatment, and a down fiber powder with an average particle size of 2 μm is obtained; S2, under room temperature conditions, 3 parts of 2, 3-epoxypropyl trimethyl ammonium chloride and 8 parts of caprylic acid are dissolved in 20 parts of diethyl ether solution to obtain a modified liquid, the down fiber powder is put into the modified liquid at a mass ratio of 1:40, and then ultrasonic dispersion, filtration and drying treatment are sequentially performed to obtain modified down fiber powder.
[0016] S3, the modified down fiber powder, isotactic polypropylene and polyurethane are uniformly mixed at a mass ratio of 1:4:7 to obtain a spinning melt, and the spinning melt is processed into a composite fiber by melt spinning technology, the temperature during melt spinning treatment is 180°C, and the drawing speed is 2 m / min; S4, the composite fiber is immersed in N-methyl pyrrolidone at 70°C, the treatment time is 48 h, and a porous composite fiber is obtained.
[0017] Example 2 A down fiber thermal insulation material, a composite method thereof comprises the following steps: S1, the down fiber is sequentially subjected to degreasing, cleaning, crushing, drying and grinding treatment, and a down fiber powder with an average particle size of 3 μm is obtained; S2, under room temperature conditions, 5 parts of 2, 3-epoxypropyl trimethyl ammonium chloride and 5 parts of caprylic acid are dissolved in 25 parts of diethyl ether solution to obtain a modified liquid, the down fiber powder is put into the modified liquid at a mass ratio of 1:40, and then ultrasonic dispersion, filtration and drying treatment are sequentially performed to obtain modified down fiber powder.
[0018] S3, the modified down fiber powder, isotactic polypropylene and polyurethane are uniformly mixed at a mass ratio of 1:4:7 to obtain a spinning melt, and the spinning melt is processed into a composite fiber by melt spinning technology, the temperature during melt spinning treatment is 180°C, and the drawing speed is 2 m / min; S4, the composite fiber is immersed in N-methyl pyrrolidone at 70°C, the treatment time is 48 h, and a porous composite fiber is obtained.
[0019] Example 3 A down fiber thermal insulation material, a composite method thereof comprises the following steps: S1, the down fiber is sequentially subjected to degreasing, cleaning, crushing, drying and grinding treatment, and a down fiber powder with an average particle size of 2.5 μm is obtained; S2, under room temperature conditions, 4 parts of 2, 3-epoxypropyltrimethylammonium chloride and 7 parts of caprylic acid are dissolved in 23 parts of diethyl ether solution to obtain a modified liquid, the down fiber powder is placed in the modified liquid at a mass ratio of 1:40, and then sequentially subjected to ultrasonic dispersion, filtration and drying treatment to obtain modified down fiber powder.
[0020] S3, the modified down fiber powder, isotactic polypropylene and polyurethane are uniformly mixed at a mass ratio of 1:4:7 to obtain a spinning melt, and the spinning melt is processed into a composite fiber by melt spinning technology, the temperature during melt spinning treatment is 180°C, and the drawing speed is 2 m / min; S4, the composite fiber is immersed in N-methyl pyrrolidone at 70°C for 48h to obtain a porous composite fiber.
[0021] Comparative Example 1 A down fiber thermal insulation material, the compounding method comprising the following steps: S1, the down fiber is sequentially subjected to degreasing, cleaning, crushing, drying and grinding treatment, and a down fiber powder with an average particle size of 2.5 μm is obtained; S2, the down fiber powder, isotactic polypropylene and polyurethane are uniformly mixed at a mass ratio of 1:4:7 to obtain a spinning melt, and the spinning melt is processed into a composite fiber by melt spinning technology, the temperature during melt spinning treatment is 180°C, and the drawing speed is 2 m / min; S4, the composite fiber is immersed in N-methyl pyrrolidone at 70°C for 48h to obtain a porous composite fiber.
[0022] Comparative Examples 2 and 3 Based on Example 3, only the component ratio of the modified liquid in S2 is adjusted, and the component ratio of the spinning solution in Example 3 and Comparative Examples 2 and 3 is shown in the following table: ; Note: "-" in the table means not added.
[0023] Comparative Example 4 Based on Example 3, only the caprylic acid in the raw materials of the modified liquid in S2 is replaced by stearic acid.
[0024] The porous composite fibers obtained in Examples 1-3 and Comparative Examples 1-4 are respectively woven into fabrics, and each fabric is sequentially subjected to a plurality of performance tests, and the test methods are as follows: ①Thermal insulation performance: refer to GB / T 11048-2008 "Textiles-Physiological Comfort-Resistance to Heat and Moisture-Part 1: Determination of Thermal Resistance by the Thermal Manikin Method". YG606E textile thermal resistance tester was used for testing. Five samples were taken for each fabric sample, and the average value was finally taken; ②Moisture resistance: under the conditions of relative humidity of 65% and temperature of 25°C, the fabric was weighed once, and W1 was obtained. Then the fabric was dried at 110°C for 2.5h, and weighed again after drying, and W2 was obtained. The moisture regain of the fabric was calculated according to the weight difference before and after drying, and the calculation formula was as follows: W (%)=(W1-W2) / W2x100.
[0025] According to the standard washing procedure set by AATCC, each group of fabric was subjected to 20 times of washing treatment, and the thermal insulation performance and moisture resistance were detected before and after washing, and the test results were shown in the following table: ; According to the above table, it can be seen that: ①The ratio of various raw materials in the modified liquid for down fiber powder was adjusted within a limited range in examples 1-3, and the preparation conditions of porous composite fibers were also adaptively adjusted. The data showed that the fabric obtained by spinning the porous composite fibers of examples 1-3 had differences in thermal insulation, moisture resistance, and water washing resistance of thermal insulation and moisture resistance, and was better than the comparative example 1 using down fiber powder without modification. This result showed that the modification of down fiber powder with 2,3-epoxypropyltrimethylammonium chloride, caprylic acid and diethyl ether could significantly improve the thermal insulation, moisture resistance and water washing resistance of the porous composite fibers containing down fiber powder; In a number of data, example 3 showed the best performance in thermal insulation, the decline range of thermal insulation caused by washing, moisture resistance, and the decline range of moisture resistance caused by washing. It was inferred that the reason for this result was the influence of the ratio of 2,3-epoxypropyltrimethylammonium chloride, caprylic acid and diethyl ether in the modified liquid for down fiber powder on the modification effect. Based on this, example 3 was selected as the best ratio; ②On the basis of Example 3, the sheep tallow acid and 2,3-epoxypropyl trimethyl ammonium chloride in the modified liquid for the down fiber powder are removed in Comparative Example 2 and Comparative Example 3 respectively, and the data show that, based on the data of Example 3, the change range of Comparative Example 3 in which the 2,3-epoxypropyl trimethyl ammonium chloride is removed is larger in the data corresponding to the heat preservation, and the change range of Comparative Example 2 in which the sheep tallow acid is removed is larger in the data related to the moisture resistance, which indicates that, when the sheep tallow acid and 2,3-epoxypropyl trimethyl ammonium chloride are used in combination for the down fiber powder, the effect of the sheep tallow acid is more relevant to the moisture resistance of the porous composite fiber, and the effect of the 2,3-epoxypropyl trimethyl ammonium chloride is more relevant to the heat preservation of the porous composite fiber; The reason for this result is inferred to be that the sheep tallow acid mainly reacts with the hydrophilic groups on the surface of the down fiber powder, thereby reducing the ability of the down fiber powder to wrap water molecules, and further realizing the effect of improving the moisture resistance, and the surface modification effect realized by the 3-epoxypropyl trimethyl ammonium chloride improves the uniformity of the dispersion of the down fiber powder in the isotactic polypropylene, so that the thermal resistance distribution of the porous composite fiber body is more uniform, and further realizing the effect of improving the heat preservation as a whole.
[0026] ③On the one hand, the change range of the data of Comparative Examples 1 and 2 before and after washing is significantly larger than that of Example 3, and on the other hand, the sheep tallow acid in the spinning solution in Example 3 is replaced by stearic acid in Comparative Example 4, and the data corresponding to Comparative Example 4 are all worse than those of Example 3, and the weakening effect of washing on the heat preservation and the moisture resistance is most significantly different from that of Example 3, which further indicates that the combination of the sheep tallow acid and the 2,3-epoxypropyl trimethyl ammonium chloride affects the water resistance of the heat preservation effect and the moisture resistance effect of the porous composite fiber, and the reason for this result is inferred to be that the combination stability of the down fiber powder and the isotactic polypropylene is affected by the combination of the sheep tallow acid and the 2,3-epoxypropyl trimethyl ammonium chloride.
[0027] The above-described examples only express several embodiments of the present application, which are described in a more specific and detailed manner, but cannot be understood as limiting the scope of the patent of the present application. It should be noted that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which are within the protection scope of the present application.
Claims
1. A down fiber thermal insulation material, characterized by, The heat preservation material is a porous composite fiber prepared by melt spinning technology, and the raw material composition includes modified down fiber powder, isotactic polypropylene and polyurethane. The modified down fiber powder is a down fiber powder modified by 2,3-epoxypropyl trimethyl ammonium chloride and caprylic acid.
2. A down fiber thermal insulation material according to claim 1, wherein The mass ratio of the modified down fiber powder, isotactic polypropylene and polyurethane in the raw material of the composite fiber is 1:4:
7.
3. A down fiber thermal insulation material according to claim 2, wherein The raw material composition of the modification liquid used by the down fiber powder includes 3-5 parts of 2,3-epoxypropyl trimethyl ammonium chloride, 5-8 parts of caprylic acid and 20-25 parts of diethyl ether.
4. A method of producing a composite of down fibers as claimed in claims 1 to 3, characterized in that, The method comprises the following steps: S1, the down fiber is sequentially subjected to degreasing, cleaning, crushing, drying and grinding treatment to obtain down fiber powder; S2, under room temperature conditions, 2,3-epoxypropyl trimethyl ammonium chloride and caprylic acid are dissolved in diethyl ether solution to obtain a modification liquid, and the down fiber powder is placed in the modification liquid, and then sequentially subjected to ultrasonic dispersion, filtration and drying treatment to obtain modified down fiber powder; S3, the modified down fiber powder, isotactic polypropylene and polyurethane are uniformly mixed to obtain a spinning melt, and the spinning melt is processed into a composite fiber by melt spinning technology; S4, under the condition of 70 DEG C, the composite fiber is immersed in N-methyl pyrrolidone for 48 hours to obtain a porous composite fiber.
5. The method of claim 4, wherein the method is characterized by, In S2, the mass ratio of the down fiber powder to the modification liquid is 1:
40.
6. The method of claim 4, wherein the method is characterized by, In S1, the average particle size of the obtained down fiber powder is 2-3 microns.
7. The method of claim 4, wherein the method is characterized by, In S3, the temperature during melt spinning treatment is 180 DEG C, and the drawing speed is 2 m / min.