SON, Kyungduk (461-5, Daejeo-1 dong Gangseo-gu, Busan 618-803, KR)
KIM, Deogsu (4-B402, Nambumin Apt. 434-357,Nambumin-dong, Seo-gu, Busan 602-020, KR)
SON, Kyungduk (461-5, Daejeo-1 dong Gangseo-gu, Busan 618-803, KR)
KIM, Deogsu (4-B402, Nambumin Apt. 434-357,Nambumin-dong, Seo-gu, Busan 602-020, KR)
Claims
[1] A method for manufacturing aqueous polyure thane coated gloves, the method comprising the steps of:
(a) preparing an aqueous polyurethane resin solution;
(b) placing textile gloves on a mold;
(c) immersing the textile gloves placed on the mold in the aqueous polyurethane resin solution;
(d) coagulating the aqueous polyurethane resin solution by immersing the textile gloves impregnated with the aqueous polyurethane resin solution in a coagulant solution for about 5 min to 30min at a temperature of 45 0 C to 9O 0 C;
(e) curing and cleaning the textile gloves by immersing the textile gloves, on which the aqueous polyurethane resin is coagulated, in water at a temperature of 45 0 C to 9O 0 C; and
(f) drying the textile gloves on which the aqueous polyurethane resin is cured. [2] The method as claimed in claim 1, further comprising a step of cooling the mold to a temperature of about 5 0 C to 35 0 C before step (b). [3] The method as claimed in claim 1, wherein the coagulant solution in step (d)is obtained by mixing 1 to 10 weight percent of any one selected from the group consisting of organic acid, base and a mixture thereof with 90 to 99 weight percent of water.
[4] The method as claimed in claim 3, wherein the organic acid includes citric acid.
[5] The method as claimed in claim 1, wherein step (f) is performed through an air cooling process at a temperature of 5O 0 Qo 9O 0 C for about 20 to 60min. [6] The method as claimed in claim 1, wherein, in step (a), the aqueous polyurethane resin solution includes 90 to 120 weight parts of polyurethane, 1 to 5 weight parts of anti-foaming agent, 0.5 to 3 weight parts of emulsifier, 1 to 10 weight parts of surfactant, 5 to 15 weight parts of release agent, 0.5 to 5 weight parts of thickener, and 583.7 to 1167.4 weight parts of water. [7] The method as claimed in claim 6, wherein the anti-foaming agent includes any one selected from the group consisting of high class alcohol, aliphatic ester, tributyl phosphate, sodium octyl phosphate, nonyl cellosolve, methyl isobutyl carbinol, poly alkylene glycol, and acetylene glycol. [8] The method as claimed in claim 6, wherein the emulsifier includes potassium hydroxide or ammonia. [9] The method as claimed in claim 6, wherein the release agent includes one selected from the group consisting of polyethylene glycol, paraffin, wax, and stearic acid. [10] The method as claimed in claim 6, wherein the thickener includes methyl cellulose, hydroxy ethyl cellulose, hydroxy propyl cellulose, polyethylene oxide, and poly acrylic acid soda.
[11] Aqueous polyurethane coated gloves manufactured through the method claimed in claims 1 to 10. |
Description
AQUEOUS POLYURETHANE COATED GLOVES AND METHOD FOR MANUFACTURING THE SAME
Technical Field
[1] The present invention relates to a method of manufacturing harmless and air- permeable aqueous polyurethane coated gloves. More particularly, the present invention relates to aqueous polyurethane coated gloves and a method for manufacturing the same, in which polyurethane is coagulated without being dissolved in water when the gloves are coated with aqueous polyurethane through a wet process, and a plurality of micro-pores are formed in the gloves to enhance the air permeability.
[2]
Background Art
[3] In general, polyurethane coated gloves prepared by using polyurethane resin are used in various fields, such as industrial companies, agricultural farms, factories, and leisure fields including fishing and sports as well as for household use.
[4] In the latest glove manufacturing technology, coated gloves are fabricated by using oil polyurethane resin through a dry process and a wet process.
[5] According to the dry process, the gloves are coated with polyurethane compound resin and then the gloves are dried. In this case, waste water is not generated, thereby preventing environmental pollution. In addition, the glove manufacturing process is simplified, so that the manufacturing time and manufacturing cost are reduced. However, a plurality of pores can not be formed when the gloves are coated with the polyurethane resin through the dry process, so the air permeability is inferior. For this reason, workers may feel unpleasant when working, and a side effect may occur on hands of worker due to sweat formed in a lining of the gloves. Further, the hands of worker may be slip in the gloves due to the sweat.
[6] According to the wet process, the gloves are immersed in a solution including an emulsifier and a toner that are mixed with polyurethane resin such that the gloves are coated with the solution, and then the gloves are coagulated by means of a proper coagulant solution to extract a solvent into the coagulant solution, thereby forming a micro-porous film. Accordingly, the wet process provides the superior air permeability and voluminous features that are scarcely obtained through the dry process.
[7]
Disclosure of Invention Technical Problem
[8] However, the oil polyurethane used for the conventional gloves employs a solvent
of DMF (dimethyl formaldehyde), which is harmful and dangerous to a human body.
[9] Accordingly, recently, attempts have been made to manufacture the coated gloves by using aqueous polyurethane, which is harmless to the human body.
[10] However, the aqueous polyurethane dissolves in water during the wet process, which produces superior products as compared with the dry process.
[11] In addition, the dissolved aqueous polyurethane penetrates into the lining of the gloves, so the aqueous polyurethane directly makes contact with the hands, thereby causing the unpleasant feeling. In addition, the sweat formed on the hands decomposes the polyurethane resin into water and a salt, so that dust is generated. The by-products of the polyurethane resin remaining on the hands exert a bad influence on the human body.
[12]
Technical Solution
[13] The present invention has been made to solve the above mentioned problems occurring in the prior art, and the present invention provides aqueous polyurethane coated gloves and a method for manufacturing the same, in which the gloves coated with aqueous polyurethane resin are immersed in a coagulant solution including acid or base, so that the aqueous polyurethane resin is rapidly coagulated, thereby preventing the aqueous polyurethane resin from dissolving. In addition, according to the present invention, a plurality of micro-pores are formed in the aqueous polyurethane coated gloves, so that the air permeability of the gloves can be improved.
[14]
Advantageous Effects
[15] According to the aqueous polyurethane coated gloves of the present invention, the air permeability can be improved, and the worker may feel pleasant when wearing the gloves. In addition, the gloves have superior flexibility, elasticity and gripping properties.
[16]
Brief Description of the Drawings
[17] FIG. 1 is a flowchart representing a process of manufacturing aqueous polyurethane coated gloves according to the present invention.
[18]
Mode for the Invention
[19] In order to accomplish the object of the present invention, there is provided a method for manufacturing aqueous polyurethane coated gloves, the method comprising the steps of (a)preparing an aqueous polyurethane resin solution, (b)placing textile gloves on a mold, (c)immersing the textile gloves placed on the mold in the aqueous
polyurethane resin solution, (d)coagulating the aqueous polyurethane resin solution by immersing the textile gloves impregnated with the aqueous polyurethane resin solution in a coagulant solution for about 5 min to 30min at a temperature of 45 0 C to 9O 0 C, (e)curing and cleaning the textile gloves by immersing the textile gloves, on which the aqueous polyurethane resin is coagulated, in water at a temperature of 45 0 C to 9O 0 C, and (fjdrying the textile gloves on which the aqueous polyurethane resin is cured.
[20] Hereinafter, the preferred embodiment of the present invention will be described with reference to accompanying drawings.
[21] FIG. 1 is a flowchart representing a process of manufacturing aqueous polyurethane coated gloves according to the present invention.
[22] As shown in FIG. 1, the aqueous polyurethane coated gloves are manufactured through the following steps.
[23] An aqueous polyurethane resin solution is prepared.
[24] Textile gloves are placed on a mold.
[25] The textile gloves placed on the mold are immersed in the aqueous polyurethane resin solution.
[26] The textile gloves impregnated with the aqueous polyurethane resin solution are immersed in a coagulant solution for about 5min to 30min at a temperature of 45 0 C to 9O 0 C, such that the aqueous polyurethane resin solution is coagulated.
[27] The textile gloves, on which the aqueous polyurethane resin is coagulated, are immersed in water at a temperature of 45 0 C to 9O 0 C, thereby being cured and cleaned.
[28] The textile gloves, on which the aqueous polyurethane resin is cured, are dried.
[29] Step (a) to Step (c)
[30] The aqueous polyurethane resin solution is prepared (step (a)), the textile gloves are placed in the mold (step (b)), and then the textile gloves placed in the mold are immersed in the aqueous polyurethane resin solution (step (c)).
[31] The mold is cooled up to a temperature of 5 0 C to 35 0 C before step (b). That is, the mold, which is heated during the drying process of a high temperature, is cooled up to the temperature of about 25 0 C, thereby facilitating wearing the textile gloves and preventing the error caused by a temperature difference during the impregnation process for the aqueous polyurethane, which will be described later.
[32] The textile gloves are placed in the mold maintained under the above temperature
(step (b)).
[33] Meanwhile, the aqueous polyurethane resin solution includes 90 to 120 weight parts of polyurethane, 1 to 5 weight parts of anti- foaming agent, 0.5 to 3 weight parts of emulsifier, 1 to 10 weight parts of surfactant, 5 to 15 weight parts of release agent, 0.5 to 5 weight parts of thickener, and 583.7 to 1167.4 weight parts of water.
[34] Preferably, as shown in table 1, the aqueous polyurethane resin solution includes
100 weight parts of polyurethane, 1.5 weight parts of anti- foaming agent, 0.94 weight parts of emulsifier, 3 weight parts of surfactant, 9.4 weight parts of release agent, 1.9 weight parts of thickener, and 800 weight parts of water.
[35] Table 1
[36] [37] The anti-foaming agent includes any one selected from the group consisting of high class alcohol, aliphatic ester, tributyl phosphate, sodium octyl phosphate, nonyl cellosolve, methyl isobutyl carbinol, alkylene glycol, and acetylene glycol.
[38] The emulsifier includes any one selected from the group consisting of potassium hydroxide and ammonia. [39] The release agent includes any one selected from the group consisting polyethylene glycol, paraffin, wax, and stearic acid. [40] The thickener raises the coefficient of viscosity of the solution to prevent the solution from flowing out of the polyurethane resin after the impregnation process, and includes any one selected from the group consisting of methyl cellulose, hydroxy ethyl cellulose, hydroxy propyl cellulose, polyethylene oxide, and poly acrylic acid soda.
[41] The mold having the gloves is immersed in the aqueous polyurethane resin solution having the composition as described above such that the aqueous polyurethane resin solution is coated on an outer surface of the gloves.
[42] Step (d) [43] The textile gloves impregnated with the aqueous polyurethane resin are taken from the aqueous polyurethane resin solution, and are immersed in the coagulant solution such that the aqueous polyurethane resin is coagulated.
[44] The gloves are immersed in the coagulating solution at the temperature of 5 0 C to 45 0 C for 5min to 30min.
[45] Here, if the temperature of the coagulant solution is less than 5 0 C, particles of the resin may be cooled, thereby causing the congelation phenomenon. If the temperature of the coagulant solution is above 45 0 C, the resin may be cured, so that the micro-pores
are not formed. Accordingly, the temperature range of 5 0 C to 45 0 C is appropriate. [46] The coagulant solution includes a solution obtained by mixing 1 to 10 weight percent of any one selected from the group consisting of organic acid and base and 90 to 99 weight percent of water.
[47] Here, the organic acid preferably includes citric acid.
[48] Step (e)
[49] The textile gloves coagulated with the aqueous polyurethane resin is cleaned and cured by water. [50] The gloves are preferably cured and cleaned at the water temperature of 45 0 C to
9O 0 C for about 5min to 30min. [51] Here, if the temperature of the water is less than 45 0 C, the curing phenomenon may not occur, and if the temperature of the water is more than 9O 0 C, the textile of the gloves may be ruined or deformed. Accordingly, the preferred temperature condition is
45 to 9O 0 C. [52] In the present embodiment, the gloves are cured and cleaned in the water having the temperature of 75 0 C for about 15min. [53] Step (f)
[54] The aqueous polyurethane resin coagulated textile gloves, which are cleaned and cured in step (e), are dried through an air cooling scheme at the temperature of 5O 0 C to
9O 0 C for about 20min to 60min. [55] In this embodiment, the gloves are air-cooling dried at a temperature of 7O 0 C for about 40min. [56] Accordingly, air particles included in the aqueous polyurethane resin are evaporated, so that the micro-pores are formed in the gloves, thereby enhancing the air permeability. [57] The textile gloves coated with the aqueous polyurethane resin as described above are separated from the mold and are collected. The above steps are repeated by using the mold after the cooling process has been performed.