A method for producing a melt-blown nonwoven down-warming batt

Abstract

The application relates to a preparation method of a melt-blown non-woven down feather warm-keeping flake, which comprises the following steps: step one: after impurity removal and cleaning, down feather is sequentially subjected to stem removal, tilting and rolling, drying and opening treatment and is ready for use; a tilting and rolling solution used in the tilting and rolling treatment comprises a red sea olive embryo axis extract, a polyacrylic acid emulsion and deionized water; step two: after polymer slicing, heating is performed to make the polymer into a molten state, the polymer melt is sprayed out through a melt-blown die head, is stretched through hot air and then falls onto a spinning plate to form a superfine fiber net; step three: before the superfine fiber net is solidified, the down feather which is subjected to the opening treatment is uniformly sprayed, is subjected to rolling and cooling and solidification treatment and then down feather warm-keeping flake is obtained. The down feather warm-keeping flake prepared by the application has good moth prevention effect, washing color fastness and perspiration stain color fastness, wherein the moth prevention effect is embodied in effectively expelling black skin capsules and clothes moths and further killing the black skin capsules and the clothes moths.

Description

Technical Field

[0001] The invention belongs to the technical field of down products, and particularly relates to a method for preparing a melt-blown non-woven down thermal insulation flake. Background Art

[0002] The meltblowing method uses a high-speed hot air flow to quickly stretch and solidify the newly extruded polymer melt into a spinning method with a high multiple. Its advantage is that the process flow is short and non-woven fabrics can be directly spun.

[0003] As for how to combine down with the meltblown process, reference can be made to the authorized invention patent CN101392432B, which discloses a method for preparing a two-component thermal insulation flake by combining meltblown non-woven fabrics and down. Specifically, polymer resin slices are heated into a molten state, extruded, metered, and evenly distributed into the holes of a spinneret device, and then stretched into ultrafine fibers by hot air. Another stream of down is subjected to stem removal, anti-puncture and anti-stab, desizing, loosening, down supply, and filling distribution, and then bonded together with the stretched but unsolidified polymer fibers to form a web, which is then wound into a flake after being received and sorted. The flake has a higher thermal insulation rate, increases resilience, and improves the longitudinal and transverse tensile strength of the flake.

[0004] It uses down, which is an animal protein fiber. In order to remove animal fat and reduce the generation of moths during later use and storage, the down is generally treated by a desizing method such as that disclosed in Patent No. CN101392432B. However, both the hot water desizing method and the alkaline solution desizing method will cause significant damage to each down fiber, which can easily lead to the breakage of the down fibers, thereby causing the quality of the down to deteriorate. Therefore, a method for preparing a melt-blown non-woven down thermal insulation sheet is proposed. It is particularly important that the prepared down thermal insulation sheet can still have a good anti-moth effect without desizing treatment. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for preparing a meltblown non-woven down thermal insulation flake in order to solve the above problems.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] A method for preparing a melt-blown non-woven down thermal insulation flake comprises the following steps:

[0008] Step 1: After cleaning and cleaning, the down is destemmed, rolled, dried, and opened for later use;

[0009] The rolling solution used in the rolling treatment includes an extract of red mangrove hypocotyls, a polyacrylic acid emulsion, and deionized water;

[0010] Step 2: After the polymer slices are heated to a molten state, the polymer melt is ejected from the meltblown die head, stretched by hot air, and falls onto the spinneret to form an ultrafine fiber web;

[0011] Step 3: Evenly spray the loosened down on the microfiber web before solidification, and obtain down warming flakes after rolling, cooling and solidification.

[0012] As a further optimized solution of the present invention, in step 1, the rolling solution comprises, by weight, 22-30 parts of Rhizophora mangrove hypocotyl extract, 12-20 parts of polyacrylic acid emulsion, and 55-65 parts of deionized water.

[0013] As a further optimization scheme of the present invention, in step one, the method for obtaining the red mangrove hypocotyl extract is specifically as follows: harvest fresh red mangrove hypocotyls, wash and crush them, and then soak them in a medical 75% ethanol solution for 18-24 hours at a soaking temperature of 30-35°C, and take the upper clear liquid, filter and concentrate it to obtain the red mangrove hypocotyl extract.

[0014] As a further optimization scheme of the present invention, the harvesting standard of the fresh red mangrove hypocotyl is that the surface of the red mangrove hypocotyl is reddish brown and the hypocotyl length is greater than 25 cm.

[0015] As a further optimized solution of the present invention, in step 1, the liquid squeezing rate of the down squeezing treatment is 65%-76%.

[0016] As a further optimized solution of the present invention, in step 2, the polymer is any one or more of polyethylene, polypropylene, and polytetrafluoroethylene.

[0017] As a further optimization solution of the present invention, in step 2, the mass ratio of the microfiber web to the down is 1:0.2-0.4.

[0018] As a further optimization solution of the present invention, in step 2, the rolling pressure is 1-3 MPa.

[0019] The beneficial effects of the present invention are:

[0020] 1) The down warming wadding prepared by the present invention has good anti-insect effect, water washing color fastness, and perspiration color fastness. The anti-insect effect is reflected in the ability to effectively repel and kill moths such as black moths and clothes moths;

[0021] 2) The down warming wadding prepared by the present invention is prepared by combining an extract of the hypocotyl of Rhizophora mangrove with a polyacrylic acid emulsion, and after a rolling process, it is attached to each down fiber. During use and storage, it can play a role in preserving the color of each down fiber, thereby improving the washing color fastness and perspiration color fastness of the down warming wadding;

[0022] 3) The use of the red mangrove hypocotyl extract in the present invention can not only effectively expel and kill moths such as black moths and clothes moths, but also preserve the color of each down fiber, making it difficult to discolor, thereby improving the washing color fastness and perspiration color fastness of the down warming wadding. DETAILED DESCRIPTION

[0023] The following is further described in detail in conjunction with the present application. 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. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0024] 1. Materials

[0025] (1) Any of down, goose down or duck down;

[0026] (2) polymer, the polymer being any one or more of polyethylene, polypropylene, and polytetrafluoroethylene;

[0027] (3) Commercially available medical 75% ethanol solution, polyacrylic acid emulsion, and deionized water;

[0028] (4) The method for obtaining the red mangrove hypocotyl extract is specifically as follows: fresh red mangrove hypocotyls are harvested, cleaned, crushed, and then soaked in a medical 75% ethanol solution for 18-24 hours at a soaking temperature of 30-35°C; the supernatant is filtered and concentrated to obtain the red mangrove hypocotyl extract; wherein, the harvesting standard of fresh red mangrove hypocotyls is that the surface of the red mangrove hypocotyls is reddish brown and the hypocotyl length is greater than 25 cm.

[0029] 2. Methods

[0030] 2.1 In order to explore the effect of down processing technology on the performance of down thermal insulation flakes, Examples 1-3, blank groups and comparative examples 1-3 were set up, as follows:

[0031] Example 1

[0032] A method for preparing a melt-blown non-woven down thermal insulation flake comprises the following steps:

[0033] Step 1: After cleaning and cleaning, the down is destemmed, rolled, dried, and opened for later use;

[0034] The rolling solution used in the rolling treatment includes an extract of red mangrove hypocotyls, a polyacrylic acid emulsion, and deionized water;

[0035] Step 2: After the polymer slices are heated to a molten state, the polymer melt is ejected from the meltblown die head, stretched by hot air, and falls onto the spinneret to form an ultrafine fiber web;

[0036] Step 3: Evenly spray the loosened down on the microfiber web before solidification, and obtain down warming flakes after rolling, cooling and solidification.

[0037] The treatment processes, parameters, and raw materials of Examples 1-3 are shown in Table 1:

[0038] Table 1 Treatment process, parameters, and raw materials

[0039]

[0040] Comparative Example 1

[0041] A method for preparing a melt-blown non-woven down thermal insulation flake comprises the following steps:

[0042] Step 1: After cleaning and cleaning, the down is destemmed, rolled, dried, and opened for later use;

[0043] The padding solution used in the padding treatment includes natural insect repellent finishing agent AI-N, polyacrylic acid emulsion, and deionized water;

[0044] Step 2: After the polymer slices are heated to a molten state, the polymer melt is ejected from the meltblown die head, stretched by hot air, and falls onto the spinneret to form an ultrafine fiber web;

[0045] Step 3: Evenly spray the loosened down on the microfiber web before solidification, and obtain down warming flakes after rolling, cooling and solidification.

[0046] The rest are consistent with Example 2.

[0047] Comparative Example 2

[0048] A method for preparing a melt-blown non-woven down thermal insulation flake comprises the following steps:

[0049] Step 1: After cleaning and cleaning, the down is destemmed, rolled, dried, and opened for later use;

[0050] The padding solution used in the padding treatment includes wormwood extract, polyacrylic acid emulsion, and deionized water;

[0051] Step 2: After the polymer slices are heated to a molten state, the polymer melt is ejected from the meltblown die head, stretched by hot air, and falls onto the spinneret to form an ultrafine fiber web;

[0052] Step 3: Evenly spray the loosened down on the microfiber web before solidification, and obtain down warming flakes after rolling, cooling and solidification.

[0053] The rest are consistent with Example 2.

[0054] Comparative Example 3

[0055] A method for preparing a melt-blown non-woven down thermal insulation flake comprises the following steps:

[0056] Step 1: After cleaning and cleaning, the down is destemmed, rolled, dried, and opened for later use;

[0057] The padding solution used in the padding treatment includes peppermint essential oil, polyacrylic acid emulsion, and deionized water;

[0058] Step 2: After the polymer slices are heated to a molten state, the polymer melt is ejected from the meltblown die head, stretched by hot air, and falls onto the spinneret to form an ultrafine fiber web;

[0059] Step 3: Evenly spray the loosened down on the microfiber web before solidification, and obtain down warming flakes after rolling, cooling and solidification.

[0060] The rest are consistent with Example 2.

[0061] Blank group

[0062] A method for preparing a melt-blown non-woven down thermal insulation flake comprises the following steps:

[0063] Step 1: The down feathers after cleaning, impurity removal and screening are then destemmed, alkali washed, dried and opened for later use;

[0064] Step 2: After the polymer slices are heated to a molten state, the polymer melt is ejected from the meltblown die head, stretched by hot air, and falls onto the spinneret to form an ultrafine fiber web;

[0065] Step 3: Evenly spray the loosened down on the microfiber web before solidification, and obtain down warming flakes after rolling, cooling and solidification.

[0066] The rest are consistent with Example 2.

[0067] 1. Test on the insect-proof performance of down thermal insulation wadding

[0068] The down thermal insulation sheets prepared according to Examples 1-3, the blank group, and Comparative Examples 1-3 were tested for their insect resistance. The insect resistance test was conducted according to the test method of GBT 29776-2013 "Determination of the Anti-Insect Resistance of Textiles". The moths used in the test were black sac and moth, and the avoidance rate and kill rate of black sac and moth were calculated.

[0069] The avoidance rate is M1 is the initial number of inserts, and M2 is the number of inserts that leave the sample (i.e., the number that does not stay on the sample);

[0070] The killing rate is M1 is the initial number of inputs, and M3 is the number of deaths;

[0071] The test data is shown in Table 2:

[0072] Table 2 Anti-insect performance test data

[0073]

[0074] Conclusion: According to Table 2, the down warming waddings prepared according to Examples 1-3 all have good anti-insect effect, which is specifically reflected in that the black sac repelling rate, killing rate and the curtain moth repelling rate and killing rate are all high, and can effectively repel moths such as black sacs and curtain moths, and can also kill moths such as black sacs and curtain moths. Among them, the down warming wadding obtained in Example 2 has the best effect, so Example 2 is the best solution;

[0075] The blank group was compared with Example 2. The blank group omitted the padding treatment of the down with the padding solution composed of the red mangrove hypocotyl extract, polyacrylic acid emulsion, and deionized water. The down thermal insulation wadding prepared in the blank group was compared with the down thermal insulation wadding prepared in Example 2. The black sac repelling rate, killing rate, and the curtain moth repelling rate and killing rate were all much lower than those in Example 2. This shows that the padding treatment of the down with the padding solution composed of the red mangrove hypocotyl extract, polyacrylic acid emulsion, and deionized water can improve the anti-insect effect of the down thermal insulation wadding;

[0076] Comparative Examples 1-3 are as follows: the mass of the red mangrove hypocotyl extract is replaced by natural insect repellent finishing agent AI-N, wormwood extract, and peppermint essential oil;

[0077] When using the natural insect repellent AI-N, the black sac repellency rate and the moth repellency rate are close to those of Examples 1-3, but in terms of the black sac killing rate and the moth killing rate, the effects of Examples 1-3 are significantly better than those of Comparative Example 1.

[0078] When using wormwood extract and peppermint essential oil, the avoidance rate and killing rate of black sac and the avoidance rate and killing rate of clothes moth are far lower than those of Examples 1-3.

[0079] 2. Color fastness test of down warming wadding

[0080] The down warming wadding prepared according to the above Examples 1-3, the blank group and the comparative examples 1-3 was subjected to a color fastness test. The color fastness test was conducted in accordance with the determination method of GB / T3922-1995 "Textiles - Test Method for Color Fastness to Perspiration" and AATCC172-2002 "Color Fastness to Oxygen-Free Bleaching for Domestic Laundry". The GB250 gray scale for evaluating color change was used, which was divided into nine grades, namely 5, 4-5, 4, 3-4, 3, 2-3, 2, 1-2, and 1, where 1 was the worst color fastness. The test data are shown in Table 3:

[0081] Table 3 Color fastness test data

[0082]

[0083]

[0084] Conclusion: From the data in Table 3, it can be seen that the down warming wadding prepared according to Example 2 can maintain good washing color fastness and perspiration color fastness, and Example 2 is the best solution;

[0085] From the data of Examples 1-3, the blank group, and the comparative examples 1-3, it can be seen that when the red mangrove hypocotyl extract is replaced with the natural insect repellent finishing agent AI-N, the wormwood extract, and the peppermint essential oil in sequence, and respectively used in combination with the polyacrylic acid emulsion, the washing color fastness and perspiration color fastness of the down warming wadding prepared in Examples 1-3 are far lower;

[0086] The red mangrove hypocotyl extract is used in combination with polyacrylic acid emulsion, which can make the red mangrove hypocotyl extract adhere to each down fiber, so that the fabric can maintain good washing color fastness and perspiration color fastness;

[0087] The extract of the hypocotyl of red mangrove is attached to each down fiber after rolling treatment. During the use and storage process, it can preserve and fix the color of each down fiber, thereby improving the washing color fastness and perspiration color fastness of the down thermal insulation flakes.

[0088] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A method for preparing a meltblown non-woven down thermal insulation flake, characterized by: The following steps are involved: Step 1: After cleaning and cleaning, the down is destemmed, rolled, dried, and opened for later use; The rolling solution used in the rolling treatment comprises, by weight, 22-30 parts of Rhizophora mangrove hypocotyl extract, 12-20 parts of polyacrylic acid emulsion, and 55-65 parts of deionized water; The method for obtaining the red mangrove hypocotyl extract is specifically as follows: fresh red mangrove hypocotyls are harvested, cleaned, crushed, and then soaked in a medical 75% ethanol solution for 18-24 hours at a soaking temperature of 30-35° C., and the supernatant is filtered and concentrated to obtain the red mangrove hypocotyl extract; The harvesting standard of the fresh red mangrove hypocotyl is that the surface of the red mangrove hypocotyl is reddish brown and the hypocotyl length is greater than 25 cm; Step 2: After the polymer slices are heated to a molten state, the polymer melt is ejected from the meltblown die head, stretched by hot air, and falls onto the spinneret to form an ultrafine fiber web; Step 3: Evenly spray the loosened down on the microfiber web before solidification, and after rolling, cooling and solidification, obtain a down warming wadding with high insect resistance, water resistance and sweat resistance color fastness.

2. The method for preparing a meltblown non-woven down thermal insulation sheet according to claim 1, characterized in that: In step 1, the liquid squeezing rate of the down squeezing treatment is 65%-76%.

3. The method for preparing a meltblown non-woven down thermal insulation sheet according to claim 1, characterized in that: In step 2, the polymer is any one or more of polyethylene, polypropylene, and polytetrafluoroethylene.

4. The method for preparing a meltblown non-woven down thermal insulation sheet according to claim 1, wherein: In step three, the mass ratio of the microfiber web to the down is 1:0.2-0.

4.

5. The method for preparing a meltblown non-woven down thermal insulation sheet according to claim 1, characterized in that: In step three, the rolling pressure is 1-3 MPa.

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