Finishing agent for improving washing resistance of down feather and preparation method of finishing agent

Abstract

The invention relates to a finishing agent for improving washing resistance of down and a preparation method thereof, and relates to the technical field of finishing agent preparation, the finishing agent comprises, by weight, 40-50 parts of polyurethane resin, 20-30 parts of epoxy resin, 1-2 parts of a cross-linking agent, 3-6 parts of bovine bone glue, 3-6 parts of konjac glucomannan and 10-15 parts of deionized water; the bovine bone glue is obtained by mixing common bovine bone glue and chitosan; the konjac glucomannan is obtained by catalyzing common konjac glucomannan through pectinase. According to the finishing agent, by adding the bovine bone glue and the konjac glucomannan, the washing resistance of down feather can be remarkably improved, the adhesive force of the finishing agent on the down feather is improved, the stability and durability of the down feather in the washing process are enhanced, meanwhile, the bovine bone glue and the konjac glucomannan are both natural products, and environmental pollution in the production process of the finishing agent can be reduced; the water resistance and the stain resistance of the down feather are improved.

Description

Technical Field

[0001] This invention belongs to the field of finishing agent preparation technology, specifically a finishing agent for improving the washability of down and its preparation method. Background Technology

[0002] Wash resistance refers to the ability of down to maintain its original dimensional stability, shape stability, and appearance after multiple washes. Finishing agents that enhance the wash resistance of down primarily function by forming a protective film on the surface of the down or within the fibers through chemical treatment, or by altering the surface properties of the fibers, thereby improving the down's wash resistance, abrasion resistance, and weather resistance. These include three-proof finishing agents, fluorocarbon waterproofing agents, and cross-linking finishing agents.

[0003] However, existing finishing agents that enhance the wash resistance of down are not environmentally friendly during manufacturing and use, and can easily cause adverse effects on the environment. For example, traditional fluorocarbon waterproofing finishing agents contain harmful substances such as perfluorooctane sulfonyl compounds (PFOS), which are difficult to degrade and pose a potential threat to the ecological environment. In addition, some finishing agents do not have a strong enough bond with the fibers after being applied to down, and are easy to fall off during washing, resulting in a decrease in finishing effect. While they can give down good wash resistance when applied for the first time, the finishing effect often gradually weakens or even disappears after multiple washes. Furthermore, some existing finishing agents affect the hand feel of the fabric. While giving down wash resistance, they also change the hand feel of the down, making it stiff and rough.

[0004] To address these issues, we provide a finishing agent that improves the washability of down and its preparation method. Summary of the Invention

[0005] The purpose of this invention is to address the problems in the prior art by providing a finishing agent that improves the washability of down and its preparation method.

[0006] The present invention achieves the above objectives through the following technical solutions: A finishing agent for improving the washability of down feathers, characterized in that, by weight, it comprises 40-50 parts of polyurethane resin, 20-30 parts of epoxy resin, 1-2 parts of crosslinking agent, 3-6 parts of bovine bone glue, 3-6 parts of konjac gum, and 10-15 parts of deionized water.

[0007] As a further optimization of the present invention, the crosslinking agent is sodium polyaldehyde alkanoate.

[0008] As a further optimization of the present invention, the bovine bone glue is obtained by mixing ordinary bovine bone glue and chitosan. Chitosan has good biocompatibility and antibacterial properties, and can improve the antibacterial properties of down.

[0009] As a further optimization of the present invention, the hybrid processing refers to: S1. Ordinary bovine bone glue and chitosan are dispersed in acetic acid solution to obtain ordinary bovine bone glue solution with a concentration of 3wt% and chitosan solution with a concentration of 2wt%, respectively. S2. Mix the ordinary bovine bone glue solution and chitosan solution at a mass ratio of 1:2-2.5 until homogeneous. During the mixing process, the temperature should be 50-60℃ and the stirring speed should be 500-1000r / min. Apply ultrasonic treatment to the mixture at a frequency of 20-40KHz for 0.5-1h. After the ultrasonic treatment is completed, allow the mixture to cool naturally. S3. Filter the mixture to separate the solids, then wash and dry the solids to obtain bovine bone glue.

[0010] As a further optimization of the present invention, the konjac gum is obtained by catalysis of pectinase from ordinary konjac gum.

[0011] As a further optimization of the present invention, the pectinase catalysis refers to: S1. Disperse ordinary konjac gum in deionized water to prepare an ordinary konjac gum solution with a concentration of 2%. S2. Mix the ordinary konjac gum solution with pectinase evenly. The mass of pectinase is 0.5-1‰ of the mass of the ordinary konjac gum solution. The reaction temperature is 40-50℃, the pH value is 3.5-4.5, and the enzymatic hydrolysis time is 40-120 min. S3. After the reaction is complete, the solution is heated to above 90°C to deactivate the pectinase. Then the solution is filtered, and the filter residue is dried to obtain konjac gum.

[0012] A method for preparing a finishing agent to improve the washability of down feathers includes the following steps: S1. Disperse bovine bone glue and konjac gum separately in deionized water at 50-60℃ to obtain bovine bone glue dispersion and konjac gum dispersion. S2. Add the remaining deionized water to the reactor and heat it to 50-60℃. Slowly add polyurethane resin and epoxy resin while stirring. After the polyurethane resin and epoxy resin are completely dispersed, add the polyaldehyde crosslinking agent. After the polyaldehyde crosslinking agent is completely dispersed, continue to add the bovine bone glue dispersion and konjac gum dispersion. Apply ultrasonic treatment to the mixture at a frequency of 15-25KHz for 0.2-0.5h. S3. After the reaction is complete, cool the mixture to room temperature and filter it. The filtrate obtained is the finishing agent.

[0013] As a further optimization of the present invention, after all the raw materials are added to the reactor, the mixture is heated to 60-80°C and then subjected to ultrasonic treatment. After the ultrasonic treatment is completed, the mixture is kept at this temperature for 1-2 hours.

[0014] The beneficial effects of this invention are as follows: 1. This invention uses polyurethane resin and epoxy resin as a base, and adds bovine bone glue and konjac gum to prepare a finishing agent. Down treated with the finishing agent can significantly improve its washability. Bovine bone glue and konjac gum also act as a certain adhesive, helping the finishing agent to better adhere to the surface of the down, enhancing the stability and durability of the down during the washing process, and helping to improve the abrasion resistance and service life of the down. At the same time, bovine bone glue and konjac gum are both natural products, which can reduce environmental pollution during the production process of the finishing agent. Animal glue has a certain effect on improving the flexibility of down fibers, making the treated down softer and more comfortable. Bovine bone glue and konjac gum can also improve the water resistance and stain resistance of down, making the down perform better in humid or polluted environments.

[0015] 2. This invention uses ordinary bovine bone glue and chitosan to prepare bovine bone glue through a mixed treatment process, which effectively improves the physicochemical properties of ordinary bovine bone glue. The bovine bone glue interacts better with down, improves the adhesion of finishing agents and the stability of the film, and achieves the effect of enhancing the wash resistance of finishing agents. Chitosan has good biocompatibility and antibacterial properties, which can further improve the antibacterial properties of down.

[0016] 3. This invention modifies ordinary konjac gum by pectinase catalysis, hydrolyzes specific chemical bonds in ordinary konjac gum, changes its molecular structure and properties, and enables it to interact better with down, improves the adhesion of finishing agents and the stability of films, achieves the effect of enhancing the wash resistance of finishing agents, and the down treated with this finishing agent has better water resistance and abrasion resistance. Detailed Implementation

[0017] The present application will now be described in further detail. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0018] I. Main Instruments and Materials The instruments used in this invention, such as ultrasonic equipment, reaction vessels, and enzymatic hydrolysis equipment, are all conventional instruments known to those skilled in the art unless otherwise specified. The reagents and materials used are all commercially available products unless otherwise specified.

[0019] II. Conducting the Experiment Select raw materials with different components, as shown in Table 1, and prepare the finishing agent according to the following preparation method: S1. Disperse bovine bone glue and konjac gum separately in deionized water at 55℃ to obtain bovine bone glue dispersion and konjac gum dispersion. The bovine bone glue is obtained by mixing ordinary bovine bone glue and chitosan. Specifically, ordinary bovine bone glue and chitosan are dispersed separately in acetic acid solution to obtain ordinary bovine bone glue solution with a concentration of 3wt% and chitosan solution with a concentration of 2wt%. The ordinary bovine bone glue solution and chitosan solution are mixed evenly at a mass ratio of 1:2. The mixing temperature is 55℃, the stirring speed is 800r / min, and the mixture is subjected to ultrasonic treatment at a frequency of 30KHz for 0.7h. After the ultrasonic treatment, the mixture is allowed to cool naturally. The mixture is then filtered to separate the solid matter, and then the solid matter is washed and dried to remove impurities, thus obtaining bovine bone glue. Konjac gum is obtained from ordinary konjac gum through pectinase catalysis. Specifically, ordinary konjac gum is dispersed in deionized water to prepare a 2% ordinary konjac gum solution. The ordinary konjac gum solution is then mixed evenly with pectinase, with the mass of pectinase being 0.7‰ of the mass of the ordinary konjac gum solution. The reaction temperature is 45℃, the pH value is 4.0, and the enzymatic hydrolysis time is 80 min. After the reaction is completed, the solution is heated to above 90℃ to inactivate the pectinase. The solution is then filtered to remove unreacted enzymes and other impurities. The filter residue is dried to obtain konjac gum. S2. Add the remaining deionized water to the reactor and heat to 55°C. Slowly add polyurethane resin and epoxy resin while stirring. After the polyurethane resin and epoxy resin are completely dispersed, add the polyaldehyde crosslinking agent, which is sodium polyaldehyde alginate. After the polyaldehyde crosslinking agent is completely dispersed, continue to add the bovine bone glue dispersion and konjac gum dispersion. Heat the mixture to 70°C and then apply ultrasonic treatment at a frequency of 20KHz for 0.3h. After the ultrasonic treatment is completed, keep it at the temperature for 1.5h to allow the components to fully crosslink. S3. After the reaction is complete, cool the mixture to room temperature and filter it. The filtrate obtained is the finishing agent.

[0020] Table 1 Raw Material Composition Table ; Note: "-" indicates that no addition is needed.

[0021] Unprocessed down was selected as a blank sample, and down treated with finishing agent prepared by AH was selected as a test sample. The washing process of down in actual use was simulated by standard washing test to evaluate its appearance changes, thermal conductivity and compression resistance after washing.

[0022] Appearance changes were visually assessed, including the presence of clumping, deformation, etc. Thermal conductivity was measured to determine if the down's insulation performance was affected by washing. A thermal conductivity meter was used to compare the thermal conductivity data of the same mass of down before and after washing. Equal masses of down were filled into equal volumes of fabric, and the test end of the thermal conductivity meter was placed against both ends of the fabric to measure the thermal conductivity. Compression resistance was assessed to evaluate the down's ability to recover from compression after washing. This mainly involved testing the down's resilience and retention capacity, measuring the thickness change of the down under a certain pressure, and evaluating its recovery ability. The retention of various properties of the down after multiple washes was evaluated, and the results are shown in Table 2. Table 2 Performance parameters of blank and test samples before and after water washing ; Note: Appearance changes are represented by levels 1-5, as shown in the table below: ; III. Results Analysis 1. Based on the table above, a comparison of the test data of components A, B, and C with other components shows that the appearance, thermal conductivity, and compression resistance of down treated with the finishing agent prepared from components A, B, and C did not change significantly after washing. The heat retention performance of the down was not greatly affected by washing, indicating that the addition of bovine bone glue and konjac gum can effectively improve the washing resistance of the finishing agent. Bovine bone glue contains abundant collagen, which can significantly improve the adhesive properties of the finishing agent, giving it better adhesion when treating various materials. It can also enhance the flexibility of the finishing agent, giving the treated materials better flexibility and abrasion resistance. Konjac gum has strong thickening and gelling abilities, which can improve the viscosity and stability of the finishing agent.

[0023] 2. Based on the table above, a comparison of the test data of components D, E, F and component A shows that their appearance changes, thermal conductivity and compression resistance are significantly weaker than those of components A, B and C. Components D and E are superior to component F. This indicates that although adding only bovine bone glue or konjac gum can improve the water washability of the finishing agent to some extent, the improvement effect is not as good as the combination of bovine bone glue and konjac gum.

[0024] 3. Based on the table above, the effect of bovine bone glue on the water resistance of the finishing agent was tested. The test data of component G and component A show that the appearance grade dropped from grade 1 to grade 2 after washing. The thermal conductivity and compression resistance were not as good as those of component A. This indicates that mixing ordinary bovine bone glue and chitosan can improve the water resistance of the finishing agent and improve the adhesion between the finishing agent and down.

[0025] 4. Based on the table above, the effect of konjac gum on the washability of the finishing agent was tested. The test data of component H and component A show that the appearance grade dropped from grade 1 to grade 2 after washing. The thermal conductivity and compression resistance were also worse than those of component A. This indicates that pectinase catalytic treatment of ordinary konjac gum can improve the washability of the finishing agent and improve the adhesion between the finishing agent and the down fabric.

[0026] The above-described embodiments are merely one implementation of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A finishing agent for improving the washability of down, characterized in that: By weight, it includes 40-50 parts of polyurethane resin, 20-30 parts of epoxy resin, 1-2 parts of crosslinking agent, 3-6 parts of bovine bone glue, 3-6 parts of konjac gum, and 10-15 parts of deionized water.

2. The finishing agent for improving the wash resistance of down according to claim 1, characterized in that: The crosslinking agent is sodium polyaldehyde ester.

3. The finishing agent for improving the wash resistance of down according to claim 1, characterized in that: The bovine bone glue is obtained by mixing and processing ordinary bovine bone glue and chitosan.

4. The finishing agent for improving the wash resistance of down according to claim 3, characterized in that: The hybrid processing refers to: S1. Ordinary bovine bone glue and chitosan are dispersed in acetic acid solution to obtain ordinary bovine bone glue solution with a concentration of 3wt% and chitosan solution with a concentration of 2wt%, respectively. S2. Mix the ordinary bovine bone glue solution and chitosan solution at a mass ratio of 1:2-2.5 until homogeneous. During the mixing process, the temperature should be 50-60℃ and the stirring speed should be 500-1000r / min. Apply ultrasonic treatment to the mixture at a frequency of 20-40KHz for 0.5-1h. After the ultrasonic treatment is completed, allow the mixture to cool naturally. S3. Filter the mixture to separate the solids, then wash and dry the solids to obtain bovine bone glue.

5. The finishing agent for improving the wash resistance of down according to claim 1, characterized in that: The konjac gum is obtained from ordinary konjac gum through pectinase catalysis.

6. The finishing agent for improving the wash resistance of down according to claim 5, characterized in that: The pectinase catalysis mentioned refers to: S1. Disperse ordinary konjac gum in deionized water to prepare an ordinary konjac gum solution with a concentration of 2%. S2. Mix the ordinary konjac gum solution with pectinase evenly. The mass of pectinase is 0.5-1‰ of the mass of the ordinary konjac gum solution. The reaction temperature is 40-50℃, the pH value is 3.5-4.5, and the enzymatic hydrolysis time is 40-120 min. S3. After the reaction is complete, the solution is heated to above 90°C to deactivate the pectinase. Then the solution is filtered, and the filter residue is dried to obtain konjac gum.

7. A method for preparing a finishing agent for improving the wash resistance of down as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. Disperse bovine bone glue and konjac gum separately in deionized water at 50-60℃ to obtain bovine bone glue dispersion and konjac gum dispersion. S2. Add the remaining deionized water to the reactor and heat it to 50-60℃. Slowly add polyurethane resin and epoxy resin while stirring. After the polyurethane resin and epoxy resin are completely dispersed, add the polyaldehyde crosslinking agent. After the polyaldehyde crosslinking agent is completely dispersed, continue to add the bovine bone glue dispersion and konjac gum dispersion. Apply ultrasonic treatment to the mixture at a frequency of 15-25KHz for 0.2-0.5h. S3. After the reaction is complete, cool the mixture to room temperature and filter it. The filtrate obtained is the finishing agent.

8. A method for preparing a finishing agent to improve the washability of down according to claim 7, characterized in that: After all the raw materials are added to the reactor, the mixture is heated to 60-80℃ and then subjected to ultrasonic treatment. After the ultrasonic treatment is completed, the mixture is kept at this temperature for 1-2 hours.