Long-lasting skin moistening type yarn knitted product, glove and process of long-lasting skin moistening type yarn knitted product

Abstract

The invention belongs to the technical field of labor protection gloves, and particularly relates to a lasting skin moistening type yarn knitted product, gloves and a process thereof. The woven product is woven by enzymolysis polyester fibers, the glove is prepared by completely dipping the woven product in mucilage, mixing 100 parts by mass of natural latex, 1-3 parts by mass of KOH, 4-6 parts by mass of perfluorosilane synergistically modified SiO2 and 15-20 parts by mass of deionized water, pre-dissolving hydroxyethyl cellulose and warm water into gel, and adjusting the viscosity to 1300-1600 mPa.s to obtain the mucilage; dipping, hot air curing and drying in a drying oven are performed in sequence; and repeating the steps to obtain a woven product which is soaked twice, namely the glove. The prepared glove has a lasting skin moistening effect and is excellent in mechanical property.

Description

Technical Field

[0001] The invention belongs to the technical field of labor protection gloves, and particularly relates to a long-lasting skin-emollient yarn knitted product, gloves and a process thereof. Background Art

[0002] Labor protection gloves, also known as labor protection gloves, are personal protective equipment used to protect the hands from physical, chemical, or biological hazards. They are widely used in various work environments, such as construction, manufacturing, and the chemical industry. Labor protection gloves need to have good wear resistance to cope with the friction and abrasion encountered during work, especially for those working environments that require handling rough or sharp objects. At the same time, the glove material should be strong enough to prevent easy tearing when pulled. In some work environments, workers' hands are exposed to the sun for long periods of time, which may cause problems such as dryness and cracking of the skin. Gloves with good moisturizing properties can make the hands feel more comfortable and reduce the discomfort caused by prolonged wear.

[0003] To achieve better mechanical properties, existing technologies often use harder materials, but this can reduce the contact area with the hand skin and hinder moisture retention. Conversely, overly soft materials may not provide adequate mechanical protection. Existing labor gloves primarily utilize latex or nitrile coatings for protection, but prolonged wear can lead to dryness of the hand skin. Some cosmetic gloves on the market, while containing moisturizing ingredients, suffer from poor wear resistance and high cost.

[0004] Polyester is a common material for work gloves, and hyaluronic acid has a good moisturizing effect. Existing technology improves the moisturizing properties of polyester gloves by impregnating them in hyaluronic acid, but the actual effect is not ideal due to the compact structure of polyester. With the development of enzymatic hydrolysis technology, enzymatic hydrolysis of polyester using cutinase can modify and degrade the polyester surface, but the degradation effect is relatively slow. Articles such as "Study on the Synergistic Enzymatic Hydrolysis of Polyester with Low Eutectic Solvents" disclose that the use of low eutectic solvents can promote the modification of polyester surfaces by cutinase, but this method has a significant impact on the mechanical properties of polyester and is not suitable for the preparation of work gloves.

[0005] Therefore, there is an urgent need for glove products that can meet industrial protection requirements and continuously release moisturizing factors. Summary of the Invention

[0006] The object of the present invention is to provide a long-lasting skin-emollient yarn knitted product, a glove and a process thereof.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A preparation process of a long-lasting skin-emollient yarn knitted product comprises the following steps:

[0009] (1) soaking polyester fiber in a laccase aqueous solution, inactivating the enzyme, and filtering to obtain pretreated polyester fiber;

[0010] (2) soaking the pretreated polyester fiber in a cutinase compound system, the cutinase compound system comprising: cutinase, lipase, alkaline protease, non-ionic surfactant, adjusting the pH to 8.0-8.5, and the balance being water; after soaking, killing the enzyme, filtering, washing, and drying to obtain enzymatically hydrolyzed polyester fiber;

[0011] (3) immersing the enzymatically hydrolyzed polyester fiber in a hyaluronic acid mixture and ultrasonically treating the mixture; filtering and drying the mixture to obtain a polyester fiber loaded with hyaluronic acid;

[0012] (4) A knitting machine is used to weave polyester fibers loaded with hyaluronic acid into the shape of gloves to obtain a long-lasting, moisturizing yarn knitted product.

[0013] Preferably, the above preparation process comprises the following steps:

[0014] (1) completely immersing the polyester fiber in a laccase aqueous solution, soaking, inactivating the enzyme, and filtering to obtain a pretreated polyester fiber;

[0015] (2) completely immersing the pretreated polyester fiber in a cutinase compound system, wherein the cutinase compound system comprises: cutinase, lipase, alkaline protease, non-ionic surfactant, adjusting the pH to 8.0-8.5, and the balance being water; soaking the pretreated polyester fiber at 40-45° C. for 24-72 hours, inactivating the enzyme, filtering, washing with ethanol solution and water in sequence, and drying to obtain enzymatically hydrolyzed polyester fiber;

[0016] (3) completely immersing the enzymatically hydrolyzed polyester fiber in the hyaluronic acid mixture and ultrasonically treating the fiber at 60-65° C. for 30-50 min; filtering and drying the fiber to obtain the hyaluronic acid-loaded polyester fiber;

[0017] (4) A knitting machine is used to weave polyester fibers loaded with hyaluronic acid into the shape of gloves to obtain a long-lasting, moisturizing yarn knitted product.

[0018] Preferably, the cutinase complex system comprises: cutinase 50-150 U / mL water, lipase 20-100 U / mL water, alkaline protease 50-150 U / mL water, a non-ionic surfactant, adjusted to pH 8.0-8.5, and the balance is water.

[0019] Preferably, the cutinase complex system comprises: cutinase 100-120 U / mL in water, lipase 40-60 U / mL in water, alkaline protease 70-90 U / mL in water, a non-ionic surfactant, adjusted to pH 8.0-8.5, and the balance is water. Soak at 40-45°C for 40-50 hours.

[0020] Preferably, the active concentration of laccase is 50-150 U / mL water, and the soaking time is 1-10 hours.

[0021] Preferably, the active concentration of laccase is 100-120 U / mL water, and the soaking time is 5-7 hours.

[0022] Preferably, the hyaluronic acid mixture comprises: 5-15 wt% hyaluronic acid, 0.2-1 wt% β-cyclodextrin, adjusted to pH 6.5-6.8, and the balance is water.

[0023] Preferably, the hyaluronic acid mixture comprises: 7-10 wt% hyaluronic acid, 0.5-0.7 wt% β-cyclodextrin, adjusted to pH 6.5-6.8, and the balance is water.

[0024] The present invention also provides a long-lasting skin-emollient yarn knitted product prepared by the preparation process.

[0025] A third aspect of the present invention provides gloves made from a knitted fabric made from a long-lasting skin-emollient yarn. The method for making the gloves comprises the following steps:

[0026] (1) KH550 is mixed with anhydrous ethanol and deionized water, and stirred to obtain a silane mixture; SiO2 is mixed with an ethanol aqueous solution, ultrasonicated, and the pH is adjusted to obtain a SiO2 suspension;

[0027] (2) adding the silane mixture dropwise to the SiO2 suspension, heating, and stirring to react; after the reaction is completed, centrifuging, washing, drying, and grinding to obtain silane-modified SiO2;

[0028] (3) mixing perfluorosilane with KH550, adding a mixture of ethanol and water, adjusting the pH, and stirring to react to obtain a pre-hydrolyzed perfluorosilane solution;

[0029] (4) mixing silane-modified SiO2 and n-hexane, adding pre-hydrolyzed perfluorosilane solution, reacting; removing water and n-hexane, and thermally curing to obtain perfluorosilane-synergistically modified SiO2;

[0030] (5) Immersing the woven fabric in the adhesive, followed by dipping, hot air curing, and oven drying; repeating the above steps to obtain a woven fabric that has been immersed twice, namely, a glove.

[0031] Preferably, the method for preparing the gloves comprises the following steps:

[0032] (1) KH550 was mixed with anhydrous ethanol and deionized water, and stirred at room temperature to obtain a silane mixture; SiO2 was mixed with an ethanol aqueous solution, and ultrasonicated to adjust the pH of the system to 4-5 to obtain a SiO suspension;

[0033] (2) adding the silane mixture dropwise to the SiO2 suspension, heating, stirring and reacting for 4-6 hours; after the reaction is completed, centrifuging, washing, vacuum drying, and grinding to obtain silane-modified SiO2;

[0034] (3) mixing perfluorosilane with KH550, adding a mixture of ethanol and water, adjusting the pH to 4-5, and reacting at a constant temperature with stirring to obtain a pre-hydrolyzed perfluorosilane solution;

[0035] (4) mixing silane-modified SiO2 and n-hexane, adding pre-hydrolyzed perfluorosilane solution, stirring and reacting; removing water and n-hexane, and thermally curing to obtain perfluorosilane-synergistically modified SiO2;

[0036] (5) The woven fabric is completely immersed in the adhesive paste, and the immersion, hot air curing, and oven drying are carried out in sequence; the above steps are repeated to obtain a woven fabric that has been immersed twice, that is, a glove.

[0037] Preferably, in step (3), the reaction is stirred at a constant temperature of 50-55° C. for 2-4 hours.

[0038] Preferably, in step (4), the reaction is stirred at 80-85° C. for 2-4 hours.

[0039] Preferably, 100 parts by mass of natural latex, 1-5 parts of KOH, 2-7 parts of perfluorosilane-modified SiO2, and 10-20 parts of deionized water are mixed to obtain a mixture, hydroxyethyl cellulose is pre-dissolved in warm water to form a gel, and the viscosity of the mixture is adjusted to 1000-2000 mPa·s to obtain a slurry.

[0040] Preferably, 100 parts by mass of natural latex, 1-3 parts of KOH, 4-6 parts of perfluorosilane-modified SiO2, and 15-20 parts of deionized water are mixed to obtain a mixture, hydroxyethyl cellulose is pre-dissolved in warm water to form a gel, and the viscosity of the mixture is adjusted to 1300-1600 mPa·s to obtain a slurry.

[0041] Preferably, in step (3), the dipping time is 1-10 min, the hot air curing is performed at 70-90° C. for 1-4 h, and the drying is performed in an oven at 60-65° C. for 20-50 min.

[0042] Preferably, in step (3), the dipping time is 1-5 min, the hot air curing is performed at 80-85° C. for 2-3 h, and the drying is performed in an oven at 60-65° C. for 20-30 min.

[0043] Compared with the prior art, the advantages and beneficial effects of the present invention are:

[0044] 1. The labor protection gloves provided by the present invention increase the adsorption amount of hyaluronic acid in polyester gloves, prolonging the lasting moisturizing time. At the same time, a balance between moisturizing performance and mechanical strength is achieved in the glove design, so that the gloves can protect the skin from moisture while having sufficient wear resistance and tensile resistance, thereby promoting the industrial mass production and widespread application of functional labor protection gloves.

[0045] 2. Through the action of specific enzymes, the present invention can form fine etching on the fiber surface without significantly damaging the overall structure and strength of the polyester fiber, introduce hydrophilic groups, increase the roughness and specific surface area of the fiber surface, and facilitate the adsorption and penetration of hyaluronic acid on the fiber surface and inside.

[0046] 3. By modifying silica, the present invention enhances the bonding between SiO2 and the organic latex matrix, effectively improving the mechanical properties of the glove. Furthermore, the SiO2 particles, dually modified with KH550 and FDTS, form "microdomains" with a specific spatial structure within the latex. These microdomains form microchannels, which serve as pathways for the outward migration of hyaluronic acid. Furthermore, the textile undergoes two impregnation steps and undergoes high-temperature curing and drying, leaving microporous structures within the material during the latex curing process. These pores connect with the channels formed by the SiO2 microdomains, forming a continuous release pathway system, allowing hyaluronic acid to slowly penetrate the glove surface without disrupting the glove's underlying structure. DETAILED DESCRIPTION

[0047] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0048] The raw materials used in the following examples of the present invention are all commercially available commodities:

[0049] Laccase, product number TX20151, Shanghai Yingxin Laboratory Equipment Co., Ltd.

[0050] cutinase, 51032, Novozymes (China) Biotechnology Co., Ltd. Lipase, Nanning Dongheng Huadao Biotechnology Co., Ltd.

[0051] Alkaline protease: Product No. P750258, Shanghai MacLean Biochemical Technology Co., Ltd.

[0052] Triton X-100, Shenzhen Jintenglong Industrial Co., Ltd.

[0053] 1H,1H,2H,2H-Perfluorodecyltrichlorosilane (FDTS) was purchased from Jiangsu Plus Biotechnology Co., Ltd.

[0054] Natural latex, Shandong Xinshengyuan Fragrance Co., Ltd., solid content 65wt%.

[0055] Polyester fiber: linear density is 300dtex.

[0056] SiO2, particle size is 100-200nm.

[0057] Example 1

[0058] This embodiment provides a long-lasting skin-emollient yarn knitted product, the preparation process of which includes the following steps:

[0059] (1) The polyester fiber was completely immersed in a laccase aqueous solution with an active concentration of 110 U / mL water, the pH was adjusted to 5.0, and the fiber was immersed for 6 h, the enzyme was inactivated, and the fiber was filtered to obtain the pretreated polyester fiber;

[0060] (2) The pretreated polyester fiber was completely immersed in a cutinase complex system, wherein the cutinase complex system includes: cutinase 110 U / mL water, lipase 50 U / mL water, alkaline protease 80 U / mL water, and a non-ionic surfactant Triton X-100 accounting for 1 wt% of the mass percentage of water, the pH was adjusted to 8.0, and the balance was water; soaking at 42° C. for 45 h, inactivating the enzyme, filtering, ultrasonically cleaning with a 20 wt% ethanol solution for 30 min, washing with water three times, and drying to obtain enzymatically hydrolyzed polyester fiber;

[0061] (3) completely immersing the enzymatically hydrolyzed polyester fiber in a hyaluronic acid mixture comprising: 9 wt% hyaluronic acid, 0.6 wt% β-cyclodextrin, adjusted to pH 6.5, with the remainder being water, and ultrasonically treating at 62° C. for 40 min; filtering, and drying to obtain a hyaluronic acid-loaded polyester fiber;

[0062] (4) A knitting machine is used to knit the polyester fiber loaded with hyaluronic acid into the shape of a glove, with a needle gauge of 15 and a horizontal density / vertical density of 7 needles / cm (horizontally) and 9 needles / cm (vertically) to obtain a long-lasting, moisturizing yarn knitted product.

[0063] This embodiment also provides gloves made from the above-mentioned long-lasting skin-emollient yarn knitted product. The preparation method of the gloves comprises the following steps:

[0064] (1) KH550 was mixed with anhydrous ethanol and deionized water in a volume ratio of 1:72:8 and stirred at room temperature for 3 h to obtain a silane mixture; SiO2 was mixed with a 45 wt% ethanol aqueous solution in a mass ratio of 1:10 and ultrasonicated for 40 min, and acetic acid was added to adjust the pH of the system to 4.5 to obtain a SiO2 suspension;

[0065] (2) Add the silane mixture dropwise to the SiO2 suspension, with the mass ratio of KH550 to SiO2 being 1:20, heat to 75°C, and stir to react for 5 hours; after the reaction, centrifuge and separate, wash with toluene and acetone three times in sequence, dry in a vacuum at 50°C for 8 hours, and grind through a 300-mesh sieve to obtain silane-modified SiO2;

[0066] (3) Perfluorosilane (FDTS) and KH550 were mixed in a mass ratio of 1:1, and a mixture of ethanol and water in a volume ratio of 3:1 was added. The total volume of perfluorosilane (FDTS) and KH550: the volume ratio of the mixture of ethanol and water was 1:10. Acetic acid was used to adjust the pH to 4.5, and the mixture was stirred at a constant temperature of 52°C for 3 hours to obtain a pre-hydrolyzed perfluorosilane solution.

[0067] (4) Mixing silane-modified SiO2 and n-hexane in a volume ratio of 1:7, adding pre-hydrolyzed perfluorosilane solution, with a mass ratio of SiO2 to perfluorosilane of 100:15, and reacting at 82°C for 3 hours; removing water and n-hexane by vacuum rotary evaporation, and thermally curing at 120°C for 1 hour to obtain perfluorosilane-synergistically modified SiO2;

[0068] (5) By weight, 100 parts of natural latex, 2 parts of KOH, 5 parts of perfluorosilane-modified SiO2, and 18 parts of deionized water are mixed to obtain a mixture, and hydroxyethyl cellulose in a mass ratio of 1:2 is pre-dissolved with 45°C warm water to form a gel, and the viscosity of the mixture is adjusted to 1500 mPa·s to obtain a glue paste; the woven fabric is immersed twice, specifically: the woven fabric is completely immersed in the glue paste for 3 minutes, hot air cured at 80°C for 2.5 hours, and oven dried at 60°C for 20 minutes; the above steps are repeated to obtain a woven fabric immersed twice, namely a glove.

[0069] Example 2

[0070] This embodiment provides a long-lasting skin-emollient yarn knitted product, the preparation process of which includes the following steps:

[0071] (1) The polyester fiber was completely immersed in a laccase aqueous solution with an active concentration of 100 U / mL water, the pH was adjusted to 5.5, the solution was immersed for 5 h, the enzyme was inactivated, and the pretreated polyester fiber was obtained by filtering.

[0072] (2) The pretreated polyester fiber was completely immersed in a cutinase complex system, wherein the cutinase complex system includes: cutinase 120 U / mL water, lipase 40 U / mL water, alkaline protease 90 U / mL water, non-ionic surfactant Triton X-100 accounting for 1 wt% of the mass percentage of water, the pH was adjusted to 8.0, and the balance was water; soaking at 45°C for 40 hours, inactivating the enzyme, filtering, ultrasonically cleaning with 20 wt% ethanol solution for 30 minutes, washing with water three times, and drying to obtain enzymatically hydrolyzed polyester fiber;

[0073] (3) completely immersing the enzymatically hydrolyzed polyester fiber in a hyaluronic acid mixture comprising: 7 wt% hyaluronic acid, 0.7 wt% β-cyclodextrin, adjusted to pH 6.5, with the remainder being water, and ultrasonically treating at 65° C. for 30 min; filtering, and drying to obtain a hyaluronic acid-loaded polyester fiber;

[0074] (4) A knitting machine is used to knit the polyester fiber loaded with hyaluronic acid into the shape of a glove, with a needle gauge of 15 and a horizontal density / vertical density of 7 needles / cm (horizontally) and 9 needles / cm (vertically) to obtain a long-lasting, moisturizing yarn knitted product.

[0075] This embodiment also provides gloves made from the above-mentioned long-lasting skin-emollient yarn knitted product. The preparation method of the gloves comprises the following steps:

[0076] (1) KH550 was mixed with anhydrous ethanol and deionized water in a volume ratio of 1:72:8 and stirred at room temperature for 4 h to obtain a silane mixture; SiO2 was mixed with a 40 wt% ethanol aqueous solution in a mass ratio of 1:10 and ultrasonicated for 60 min, and acetic acid was added to adjust the pH of the system to 4 to obtain a SiO2 suspension;

[0077] (2) Add the silane mixture dropwise to the SiO2 suspension, with the mass ratio of KH550 to SiO2 being 6:100, heat to 70°C, and stir for 6 hours; after the reaction, centrifuge and separate, wash with toluene and acetone three times in sequence, dry in a vacuum at 50°C for 8 hours, and grind through a 300-mesh sieve to obtain silane-modified SiO2;

[0078] (3) Perfluorosilane (FDTS) and KH550 were mixed in a mass ratio of 1:1, and a mixture of ethanol and water in a volume ratio of 3:1 was added. The total volume of perfluorosilane (FDTS) and KH550: the volume ratio of the mixture of ethanol and water was 1:10. Acetic acid was used to adjust the pH to 4, and the mixture was stirred at a constant temperature of 55°C for 3 hours to obtain a pre-hydrolyzed perfluorosilane solution.

[0079] (4) Mixing silane-modified SiO2 and n-hexane in a volume ratio of 1:7, adding pre-hydrolyzed perfluorosilane solution, with a mass ratio of SiO2 to perfluorosilane of 100:14, and reacting at 85°C for 2h; removing water and n-hexane by vacuum rotary evaporation, and thermally curing at 120°C for 1h to obtain perfluorosilane-synergistically modified SiO2;

[0080] (5) By weight, 100 parts of natural latex, 3 parts of KOH, 4 parts of perfluorosilane-modified SiO2, and 20 parts of deionized water are mixed to obtain a mixture, and hydroxyethyl cellulose in a mass ratio of 1:2 is pre-dissolved with 40°C warm water to form a gel, and the viscosity of the mixture is adjusted to 1600 mPa·s to obtain a glue paste; the woven fabric is immersed twice, specifically: the woven fabric is completely immersed in the glue paste for 2 minutes, hot air cured at 80°C for 3 hours, and oven dried at 60°C for 20 minutes; the above steps are repeated to obtain a woven fabric immersed twice, namely a glove.

[0081] Example 3

[0082] This embodiment provides a long-lasting skin-emollient yarn knitted product, the preparation process of which includes the following steps:

[0083] (1) The polyester fiber was completely immersed in a laccase aqueous solution with an active concentration of 120 U / mL water, the pH was adjusted to 5.0, the fiber was immersed for 7 h, the enzyme was inactivated, and the fiber was filtered to obtain the pretreated polyester fiber;

[0084] (2) The pretreated polyester fiber was completely immersed in a cutinase complex system, wherein the cutinase complex system includes: cutinase 100 U / mL water, lipase 60 U / mL water, alkaline protease 70 U / mL water, and a non-ionic surfactant Triton X-100 accounting for 1 wt% of the mass percentage of water, the pH was adjusted to 8.5, and the balance was water; soaking at 40°C for 50 h, inactivating the enzyme, filtering, ultrasonically cleaning with 20 wt% ethanol solution for 30 min, washing twice with water, and drying to obtain enzymatically hydrolyzed polyester fiber;

[0085] (3) completely immersing the enzymatically hydrolyzed polyester fiber in a hyaluronic acid mixture comprising: 10 wt% hyaluronic acid, 0.5 wt% β-cyclodextrin, adjusted to pH 6.8, with the remainder being water, and ultrasonically treating at 60° C. for 50 min; filtering, and drying to obtain a hyaluronic acid-loaded polyester fiber;

[0086] (4) A knitting machine is used to knit the polyester fiber loaded with hyaluronic acid into the shape of a glove, with a needle gauge of 15 and a horizontal density / vertical density of 7 needles / cm (horizontally) and 9 needles / cm (vertically) to obtain a long-lasting, moisturizing yarn knitted product.

[0087] This embodiment also provides gloves made from the above-mentioned long-lasting skin-emollient yarn knitted product. The preparation method of the gloves comprises the following steps:

[0088] (1) KH550 was mixed with anhydrous ethanol and deionized water in a volume ratio of 1:72:8 and stirred at room temperature for 2 h to obtain a silane mixture; SiO2 was mixed with a 50 wt% ethanol aqueous solution in a mass ratio of 1:10 and ultrasonicated for 30 min, and acetic acid was added to adjust the pH of the system to 5 to obtain a SiO2 suspension;

[0089] (2) Add the silane mixture dropwise to the SiO2 suspension, with the mass ratio of KH550 to SiO2 being 4:100, heat to 80°C, and stir to react for 4 hours; after the reaction, centrifuge and separate, wash with toluene and acetone three times in sequence, dry in a vacuum at 50°C for 8 hours, and grind through a 300-mesh sieve to obtain silane-modified SiO2;

[0090] (3) Perfluorosilane (FDTS) and KH550 were mixed in a mass ratio of 1:1, and a mixture of ethanol and water in a volume ratio of 3:1 was added. The total volume of perfluorosilane (FDTS) and KH550: the volume ratio of the mixture of ethanol and water was 1:10. Acetic acid was used to adjust the pH to 5, and the mixture was stirred at a constant temperature of 50°C for 4 hours to obtain a pre-hydrolyzed perfluorosilane solution.

[0091] (4) Mixing silane-modified SiO2 and n-hexane in a volume ratio of 1:7, adding pre-hydrolyzed perfluorosilane solution, with a mass ratio of SiO2 to perfluorosilane of 100:14, and reacting at 85°C for 2h; removing water and n-hexane by vacuum rotary evaporation, and thermally curing at 120°C for 1h to obtain perfluorosilane-synergistically modified SiO2;

[0092] (5) 100 parts of natural latex, 3 parts of KOH, 4 parts of perfluorosilane-modified SiO2, and 20 parts of deionized water are mixed by weight to obtain a mixture; hydroxyethyl cellulose in a mass ratio of 1:2 is pre-dissolved with 40°C warm water to form a gel, and the viscosity of the mixture is adjusted to 1600 mPa·s to obtain a glue paste; the woven fabric is immersed twice, specifically: the woven fabric is completely immersed in the glue paste for 5 minutes, hot air cured at 80°C for 3 hours, and oven dried at 60°C for 20 minutes; the above steps are repeated to obtain a woven fabric immersed twice, namely a glove.

[0093] Comparative Example 1

[0094] The difference between this comparative example and Example 1 is that only cutinase is used for enzymatic hydrolysis. The rest is the same as Example 1.

[0095] A long-lasting skin-emollient yarn knitted product, the preparation process of which comprises the following steps:

[0096] (1) The polyester fiber was completely immersed in a laccase aqueous solution with an active concentration of 110 U / mL water, the pH was adjusted to 5.0, and the fiber was immersed for 6 h, the enzyme was inactivated, and the fiber was filtered to obtain the pretreated polyester fiber;

[0097] (2) The pretreated polyester fiber was completely immersed in a cutinase complex system, wherein the cutinase complex system includes: 240 U / mL cutinase in water, 1 wt% of non-ionic surfactant Triton X-100 by weight of water, adjusted to pH 8.0, and the balance is water; soaking at 42° C. for 45 h, inactivating the enzyme, filtering, ultrasonically cleaning with a 20 wt% ethanol solution for 30 min, washing with water three times, and drying to obtain enzymatically hydrolyzed polyester fiber;

[0098] (3) completely immersing the enzymatically hydrolyzed polyester fiber in a hyaluronic acid mixture comprising: 9 wt% hyaluronic acid, 0.6 wt% β-cyclodextrin, adjusted to pH 6.5, with the remainder being water, and ultrasonically treating at 62° C. for 40 min; filtering, and drying to obtain a hyaluronic acid-loaded polyester fiber;

[0099] (4) A knitting machine is used to knit the polyester fiber loaded with hyaluronic acid into the shape of a glove, with a needle gauge of 15 and a horizontal density / vertical density of 7 needles / cm (horizontally) and 9 needles / cm (vertically) to obtain a long-lasting, moisturizing yarn knitted product.

[0100] Comparative Example 2

[0101] The difference between this comparative example and Example 1 is that the cutinase compound system includes: cutinase 110U / mL water, lipase 120U / mL water, alkaline protease 10U / mL water, non-ionic surfactant TritonX-100 accounting for 1wt% of the mass percentage of water, pH 8.0 is adjusted, and the balance is water.

[0102] Comparative Example 3

[0103] The difference between this comparative example and Example 1 is that no nonionic surfactant is added.

[0104] The cutinase complex system includes: cutinase 110U / mL water, lipase 50U / mL water, alkaline protease 80U / mL water, adjusted to pH 8.0, and the balance is water.

[0105] Comparative Example 4

[0106] The difference between this comparative example and Example 1 is that laccase is not used for pre-enzymatic hydrolysis.

[0107] A long-lasting skin-emollient yarn knitted product, the preparation process of which comprises the following steps:

[0108] (1) The polyester fiber is completely immersed in a cutinase complex system, wherein the cutinase complex system includes: cutinase 110 U / mL water, lipase 50 U / mL water, alkaline protease 80 U / mL water, and a non-ionic surfactant Triton X-100 accounting for 1 wt% of the mass percentage of water, the pH is adjusted to 8.0, and the balance is water; soaking at 42° C. for 45 h, inactivating the enzyme, filtering, ultrasonically cleaning with a 20 wt% ethanol solution for 30 min, washing with water three times, and drying to obtain enzymatically hydrolyzed polyester fiber;

[0109] (2) completely immersing the enzymatically hydrolyzed polyester fiber in a hyaluronic acid mixture comprising: 9 wt% hyaluronic acid, 0.6 wt% β-cyclodextrin, adjusted to pH 6.5, with the remainder being water, and ultrasonically treating at 62° C. for 40 min; filtering, and drying to obtain a hyaluronic acid-loaded polyester fiber;

[0110] (3) A knitting machine is used to knit the polyester fiber loaded with hyaluronic acid into the shape of a glove, with a needle gauge of 15 and a horizontal density / vertical density of 7 needles / cm (horizontally) and 9 needles / cm (vertically) to obtain a long-lasting, moisturizing yarn knitted product.

[0111] Comparative Example 5

[0112] The difference between this comparative example and Example 1 is that the gloves are made of the above-mentioned long-lasting skin-emollient yarn knitted product, and the preparation method of the gloves includes the following steps:

[0113] (1) KH550 was mixed with anhydrous ethanol and deionized water in a volume ratio of 1:72:8 and stirred at room temperature for 3 h to obtain a silane mixture; SiO2 was mixed with a 45 wt% ethanol aqueous solution in a mass ratio of 1:10 and ultrasonicated for 40 min, and acetic acid was added to adjust the pH of the system to 4.5 to obtain a SiO suspension;

[0114] (2) Add the silane mixture dropwise to the SiO2 suspension, with the mass ratio of KH550 to SiO being 1:20, heat to 75°C, and stir for 5 hours; after the reaction, centrifuge and separate, wash with toluene and acetone three times in sequence, dry in a vacuum at 50°C for 8 hours, and grind through a 300-mesh sieve to obtain silane-modified SiO2;

[0115] (3) 100 parts of natural latex, 2 parts of KOH, 5 parts of silane-modified SiO2, and 18 parts of deionized water are mixed by weight to obtain a mixture, and hydroxyethyl cellulose in a mass ratio of 1:2 is pre-dissolved in 45°C warm water to form a gel, and the viscosity of the mixture is adjusted to 1500 mPa·s to obtain a glue paste; the woven fabric is immersed twice, specifically: the woven fabric is completely immersed in the glue paste for 3 minutes, hot air cured at 80°C for 2.5 hours, and oven dried at 60°C for 20 minutes; the above steps are repeated to obtain a woven fabric immersed twice, namely a glove.

[0116] Comparative Example 6

[0117] The difference between this comparative example and Example 1 is that the gloves are made of the above-mentioned long-lasting skin-emollient yarn knitted product, and the preparation method of the gloves includes the following steps:

[0118] A mixture is prepared by mixing 100 parts of natural latex, 2 parts of KOH, 5 parts of SiO2, and 18 parts of deionized water, by weight. Hydroxyethyl cellulose in a mass ratio of 1:2 is pre-dissolved in 45°C warm water to form a gel, and the viscosity of the mixture is adjusted to 1500 mPa·s to obtain a slurry. The woven fabric is then dipped twice, specifically by completely dipping the fabric in the slurry for 3 minutes, hot-air curing at 80°C for 2.5 hours, and oven drying at 60°C for 20 minutes. The above steps are repeated to obtain a twice-dipped woven fabric, namely, a glove.

[0119] Performance Testing

[0120] 1. The mechanical properties of the gloves prepared in Examples 1-3 and Comparative Examples 1-6 were tested with reference to GB 24541-2022 Hand Protection Gloves for Mechanical Hazard Protection.

[0121] 2. Moisture regain indicates the degree of moisture absorption of textile materials. The knitted fabrics prepared in Examples 1-3 and Comparative Examples 1-6 were subjected to moisture balance according to GB / T 6529-2008, "Standard Atmospheres for Humidity Conditioning and Testing of Textiles." The moisture regain was then measured using a moisture meter. The drying temperature was 105°C, and the constant weight time was 100 seconds. Three tests were repeated, and the average value was calculated.

[0122] The results are shown in Table 1.

[0123] Table 1 Performance test results

[0124]

[0125] As shown in Table 1, the knitted fabrics of Examples 1-3 have high moisture regain and good moisturizing effect, and the gloves also have excellent mechanical properties.

[0126] In Comparative Example 1, only cutinase was used for enzymatic hydrolysis, and the moisture regain was significantly reduced, and the mechanical properties also decreased.

[0127] In Comparative Example 2, the enzyme content in the cutinase compound system was changed. The moisture regain did not decrease significantly compared with the example, but the tear strength was significantly reduced. This shows that enzymatic hydrolysis under this ratio will cause significant damage to the structure of polyester, thereby affecting the mechanical properties of the gloves.

[0128] In Comparative Example 3, no nonionic surfactant was added, and the moisture regain decreased, indicating that the use of nonionic surfactants can synergistically promote the enzymatic hydrolysis.

[0129] In Comparative Example 4, laccase was not used for pre-enzymatic hydrolysis, and the moisture regain decreased.

[0130] In Comparative Example 5, only KH550 was used to modify the silica, and the mechanical properties of the gloves were reduced.

[0131] In Comparative Example 6, the silica was not modified, and the mechanical properties of the gloves decreased.

[0132] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A process for preparing a long-lasting skin-emollient yarn knitted product, characterized in that: The following steps are involved: (1) soaking polyester fiber in a laccase aqueous solution, inactivating the enzyme, and filtering to obtain pretreated polyester fiber; (2) soaking the pretreated polyester fiber in a cutinase compound system, wherein the cutinase compound system includes: cutinase, lipase, alkaline protease, non-ionic surfactant, adjusting the pH to 8.0-8.5, and the balance is water; After soaking, the enzyme is inactivated, filtered, washed, and dried to obtain enzymatically hydrolyzed polyester fibers; (3) immersing the enzymatically hydrolyzed polyester fiber in a hyaluronic acid mixture and ultrasonically treating the mixture; filtering and drying the mixture to obtain a polyester fiber loaded with hyaluronic acid; (4) A knitting machine is used to weave polyester fibers loaded with hyaluronic acid into the shape of gloves to obtain a long-lasting, moisturizing yarn knitted product.

2. The preparation process of the long-lasting skin-emollient yarn knitted product according to claim 1, characterized in that: The cutinase complex system includes: cutinase 50-150 U / mL water, lipase 20-100 U / mL water, alkaline protease 50-150 U / mL water, non-ionic surfactant, pH adjusted to 8.0-8.5, and the balance is water.

3. The preparation process of the long-lasting skin-emollient yarn knitted product according to claim 1, characterized in that: In the laccase aqueous solution, the activity concentration of laccase is 50-150 U / mL water, and the immersion time is 1-10 hours.

4. The process for preparing the long-lasting skin-emollient yarn knitted product according to claim 1, wherein: The hyaluronic acid mixture includes: 5-15wt% hyaluronic acid, 0.2-1wt% β-cyclodextrin, adjusted to pH 6.5-6.8, and the balance is water.

5. A long-lasting skin-emollient yarn knitted product prepared by the preparation process according to any one of claims 1 to 4.

6. A glove made from the long-lasting skin-emollient yarn knitted fabric according to claim 5, characterized in that: The method for preparing the gloves comprises the following steps: (1) KH550 is mixed with anhydrous ethanol and deionized water, and stirred to obtain a silane mixture; SiO2 is mixed with an ethanol aqueous solution, ultrasonicated, and the pH is adjusted to obtain a SiO2 suspension; (2) adding the silane mixture dropwise to the SiO2 suspension, heating, and stirring to react; after the reaction is completed, centrifuging, washing, drying, and grinding to obtain silane-modified SiO2; (3) mixing perfluorosilane with KH550, adding a mixture of ethanol and water, adjusting the pH, and stirring to react to obtain a pre-hydrolyzed perfluorosilane solution; (4) mixing silane-modified SiO2 and n-hexane, adding pre-hydrolyzed perfluorosilane solution, reacting; removing water and n-hexane, and thermally curing to obtain perfluorosilane-synergistically modified SiO2; (5) Immersing the woven fabric in the adhesive, followed by dipping, hot air curing, and oven drying; repeating the above steps to obtain a woven fabric that has been immersed twice, namely, a glove.

7. The gloves made of the long-lasting skin-emollient yarn knitted product according to claim 6, characterized in that: In step (3), the reaction is stirred at 50-55°C for 2-4 hours.

8. The gloves made of the long-lasting skin-emollient yarn knitted fabric according to claim 6, characterized in that: In step (4), the reaction is carried out at 80-85°C for 2-4 hours.

9. The gloves made of the long-lasting skin-emollient yarn knitted fabric according to claim 6, characterized in that: The invention discloses a method for preparing a slurry by mixing 100 parts of natural latex, 1-5 parts of KOH, 2-7 parts of SiO2 modified by perfluorosilane and 10-20 parts of deionized water, and pre-dissolving hydroxyethyl cellulose in warm water into a gel-like state, and using the pre-dissolved hydroxyethyl cellulose in warm water to adjust the viscosity of the mixture to 1000-2000 mPa·s.

10. The gloves made of the long-lasting skin-emollient yarn knitted fabric according to claim 6, characterized in that: In step (5), the dipping time is 1-10 min, the hot air curing is performed at 70-90° C. for 1-4 h, and the oven drying is performed at 60-65° C. for 20-50 min.

Images