KR101056846B1 - Method of manufacturing polyurethane coated gloves - Google Patents

Abstract

The present invention relates to a method for producing a polyurethane coated gloves, in particular 25-35% by weight of polyurethane resin and 65-75% by weight of dimethylacetamide (DMAC) or dimethyl sulfoxide (DMSO) at 60 ~ 100 ℃ stirrer ( 10) after mixing to form a polyurethane coating solution base, 140 to 190 parts by weight of dimethyl acetamide (DMAC) or dimethyl sulfoxide (DMSO) and 1 to 5 parts by weight of surfactant based on 100 parts by weight of the polyurethane coating solution base And 0.5-3 parts by weight of an antifoaming agent at 20-40 ° C. to form a coating agent, and after dipping the glove 1 into the dipping tank 30 to which the coating agent was supplied, 20-40 ° C. Immerse the glove (1) in the coagulation tank 40 filled with water to solidify the coating layer (5) applied to the glove (1), and then step by step with hot water at 60 ~ 65 ℃ in the water washing tank (1) By washing with water so that the solvent contained in the coating layer 5 is eluted. Polyurethane-coated gloves that can block the toxic effects of residual dimethylformamide (DMF) in the source, minimize the harmful effects of organic solvents, and easily control the mixing ratio of the coating according to the working environment. It relates to a manufacturing method of.

Gloves, Coatings, Polyurethanes, Dimethylacetamide, Dimethylsulfoxide

Description

MANUFACTURING METHOD OF POLYURETHANE COATED GLOVES}

The present invention relates to a method for producing polyurethane coated gloves, and more particularly, in coating a polyurethane resin on all or part of gloves, dimethylacetamide (DMAC) or dimethyl sulfoxide on a polyurethane coating liquid base mixed with a solvent. By mixing the side (DMSO) to form a coating, it prevents the original toxicity of the coating gloves caused by conventional dimethylformamide (DMF), and also wash the stepped glove with dipping and solidification step with hot water step by step to the coating layer of the glove It is possible to elute the contained organic solvent as much as possible. Meanwhile, the polyurethane coating gloves can be easily formed by forming the polyurethane coating solution base first and then mixing the remaining raw materials according to the working conditions to complete the coating agent. It relates to a manufacturing method of.

In general, coated gloves improve the workability by coating natural or synthetic resin on all or part of gloves to prevent slippage and to prevent the gloves from getting wet with liquids such as water or oil. As a kind of coating agent is used, the quality of the coating gloves such as traction, breathability, wearing comfort, oil resistance, durability is determined according to the type of coating agent.

Looking at the polyurethane coating gloves in more detail of the conventional coating gloves, polyurethane coating gloves are widely used as work gloves at home and industrial sites because of excellent grip and durability and inexpensive, as a invention related to the manufacturing method 10-0429310 (published on May 03, 2004, hereinafter referred to as a 'prior invention') has been proposed. According to the conventional invention, a polyurethane resin, dimethylformamide (DMF), a surfactant, It can be seen that the pigment is mixed to form a coating agent necessary for the preparation of the coating gloves.

On the other hand, dimethylformamide (DMF) contained in the coating agent in the above as a solvent for diluting the polyurethane resin, the polyurethane resin is coated on the glove in a moderately thin coating rather than thick coating to improve the breathability, fit and mobility of the coated gloves Function.

However, the dimethylformamide (DMF) has a risk of damaging the liver, may cause cancer, may cause skin disease, lethargy, dizziness, headache, abdominal pain, nausea, vomiting, constipation, etc. In developed countries, it is a hazardous substance regulated for its use (10 ppm of 8 hour skin contact at both the recommended exposure limit of the National Occupational Safety and Health Association and the allowable exposure limit of the Occupational Safety and Health Administration). As a result, residual dimethylformamide (DMF) is generated because the complete removal is practically impossible even though all of them must be removed at the washing step of the manufacturing process according to the related art, and thus, the conventional polyurethane coated gloves are harmful to the user. There was this.

In addition, according to the conventional invention, it can be seen that the coating solution is completed by mixing the polyurethane resin, the dimethylformamide (DMF), the surfactant, the pigment, and the like at a predetermined ratio and then sealing and stirring. When the coating liquid in the finished state takes up a considerable volume and cannot be transported and stored, it is necessary to replenish the coating liquid in the manufacture of coating gloves, or to adjust the concentration of the coating liquid according to the change of product or the working environment. The adjustment was difficult, and as a result, there was a problem that the productivity is lowered.

The present invention is to solve the conventional problems as described above, to provide a polyurethane coated gloves harmless to the human body by eliminating the use of dimethylformamide (DMF) in manufacturing a polyurethane coated gloves, remaining in the coated gloves The present invention provides a method of preparing a polyurethane coated glove that can minimize the organic solvent, and on the other hand, facilitate the storage and transport of the coating, and can easily adjust the blending ratio of the coating according to changes in the working environment. There is a purpose.

Method for producing a polyurethane coated gloves according to the present invention for achieving the above object, 25 to 35% by weight of the polyurethane resin and dimethylacetamide (Dimethylacetamide, DMAC) or dimethyl sulfoxide (dimethylsulfoxide, DMSO) 65 to 75% by weight of a polyurethane coating solution base generation step of mixing for 2 to 10 hours at 60 ~ 100 ℃ with a stirrer and dimethyl per 100 parts by weight of the polyurethane coating solution base 140-190 parts by weight of acetamide (DMAC) or dimethyl sulfoxide (DMSO), 1-5 parts by weight of surfactant and 0.5-3 parts by weight of antifoaming agent at 20-40 ° C. The dipping step of immersing in the dipping tank supplied with the coating agent, and the coating is coated on the surface of the gloves by immersing the glove coated with the coating agent in the coagulation tank filled with water of 20 ~ 40 ℃ St. coagulation step, a method of manufacturing a polyurethane coated glove comprising a water washing step and a drying step of washing the glove washing step-by-step in the heated glove can filled Sejo of 60 ~ 65 ℃ that is characterized.

According to the manufacturing method of the polyurethane coated gloves according to the present invention as described above, since no dimethyl formamide (DMF) is used in manufacturing the polyurethane coated gloves to prevent the toxic effects due to residual dimethyl formamide (DMF) at the source. Of course, the organic solvent contained in the coating agent can be eluted as much as possible to minimize the harmful effects. In addition, the polyurethane coating solution base is first formed, and then a certain amount of dimethylacetamide (DMAC) or dimethyl sulfoxide (DMSO) depending on the working environment. Since the coating is completed by mixing and the like, it is easy to store and transport the coating agent and the coating solution base, and also has an effect of easily adjusting the mixing ratio of the coating agent according to the change in the working environment.

Hereinafter, a method of manufacturing a polyurethane coating glove according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The present invention relates to a polyurethane coating solution base generating process, a coating agent producing process, a dipping process, a solidifying process, a washing process, a drying process. Look in detail by dividing.

1 is a flow chart showing a method for manufacturing a polyurethane coated gloves according to the present invention, Figure 2 is a process chart of the present invention, Figure 3 is a perspective view showing a coated glove according to the present invention.

<Polyurethane coating solution base production process>

Polyurethane coating liquid base production process, 25-35% by weight of polyurethane resin and 65-75% by weight of dimethylacetamide (DMAC) or dimethylsulfoxide (Dimethylsulfoxide (DMSO) in a stirrer (10) Stirring for 2 to 10 hours at 60 ~ 100 ℃, the polyurethane coating liquid produced by this process is sealed in a fixed container to facilitate its storage and transport.

In the above, the polyurethane resin is preferably mixed with 500 to 800 parts by weight of polyether with respect to 100 parts by weight of diisocyanate, wherein the polyether is an additive as glycol and diamine. Butanethiol (Butanethiol) can be optionally added at least one or more, it is preferable to include 1 to 50 parts by weight of the additive in the 500 to 800 parts by weight of the polyether.

Meanwhile, any one of polyethylene glycol, polypropylene glycol, and polytetramethylene glycol may be used for the polyether, and diisocyanate may be TDI (Toluene Diisocyanate) or MDI (4,4). It is preferable to use any one of -Diphenyl methane Diisocyanate (IPDI), Isophorone Diisocyanate (IPDI), and Hexamethylene Diisocyanate (HDI), but the present invention is not limited to the kind of polyether and diisocyanate.

Coating Process

The coating production process is 140 to 190 parts by weight of dimethyl acetamide (DMAC) or dimethyl sulfoxide (DMSO), 1 to 5 parts by weight of surfactant, and 0.5 to 3 parts by weight of antifoaming agent based on 100 parts by weight of the polyurethane coating solution base. 20) and mixing for 2-6 hours at 20 ~ 40 ℃, according to the thickness of the coating layer (5) to be formed on the glove 1 dimethylacetamide (DMAC) or dimethyl sulfoxide for the polyurethane coating liquid base The concentration of the coating agent can be easily controlled by controlling the mixing ratio of the side (DMSO) within the allowable range.

In addition, in the case of replenishing the coating agent to the dipping tank 30, by adjusting the mixing ratio of the polyurethane coating liquid base and dimethylacetamide (DMA) or dimethyl sulfoxide (DMSO) according to the concentration of the residual coating agent, The concentration of the coating agent filled in the ping bath 30 may be kept constant.

On the other hand, the coating agent may be selectively mixed with the pigment, when further mixing the pigment, the polyurethane coating liquid base, dimethylacetamide (DMAC) or dimethyl sulfoxide (DMSO), surfactants, antifoaming agent (the main mixer ( 21), it is preferable to further mix 1 to 30 parts by weight of the pigment using the auxiliary compounder 22 after the first compounding.

In the above, the surfactant allows the polyurethane resin to easily invade the glove 1, the antifoaming agent serves to remove bubbles contained in the coating agent, and the pigment imparts color.

<Dipping Process>

The dipping process is a step of immersing the glove (1) sandwiched in the mold in the dipping tank (30) supplied with the coating agent to uniformly apply the coating on the surface of the glove (1), the coating agent glove (1) It can be applied to all or part of the.

<Solidification process>

The coagulation step is a step of forming the coating layer 5 on the surface of the glove 1 by immersing the glove in a coagulation bath 40 filled with water at 20 to 40 ° C. to solidify the coating agent applied to the glove 1. At this time, if the temperature of the coagulation bath 40 exceeds 40 ℃ water vapor may be generated to adversely affect the coating material filled in the adjacent dipping tank 30, it is preferable to maintain 30 ℃.

<Washing process>

In the washing step, the glove that has undergone the coagulation step is immersed in a washing tank 50 filled with hot water at 60 to 65 ° C., and dimethylacetamide (DMAC) or dimethyl sulfoxide, which is a solvent included in the coating layer 5 of the glove 1, is washed with water. As a process for eluting the side (DMSO), the water washing tank 50 is formed step by step as shown in Figure 2 so that the solvent contained in the coating layer 5 of the glove 1 can be more completely eluted. .

<Drying process>

The drying step is a step of putting the glove that has undergone the water washing step into the dryer 60 and drying it with hot air at 80 to 120 ° C.

Looking at the operation of the present invention, as a coating agent is formed by mixing a polyurethane resin and dimethylacetamide (DMAC) or dimethylsulfoxide (dimethylsulfoxide, DMSO), which is relatively harmful to the human body, of the conventional polyurethane coating gloves Dimethylacetamide (DMAC) remaining in the coating layer (5) of the glove (1) can be fundamentally prevented from harmful effects caused by residual dimethylformamide (DMF) and washed several times with coating gloves with hot water after the dipping and solidification process. Or dimethylsulfoxide (DMSO) can be minimized.

In addition, by adjusting the mixing ratio of dimethyl acetamide (DMAC) or dimethyl sulfoxide (DMSO) to be added to the blender 20, it is possible to easily control the concentration of the coating agent supplied to the dipping tank 30, dipping tank In the case of replenishing the coating agent in the 30, the dipping bath 30 is controlled by adjusting the mixing ratio of dimethylacetamide (DMAC) or dimethyl sulfoxide (DMSO), which is added according to the concentration change of the coating agent being used in the dipping tank 30. The concentration of the coating agent filled in can be kept constant.

1 is a flow chart showing a method of manufacturing a polyurethane coated gloves according to the invention

Figure 2 is a process chart showing a method for producing a polyurethane coated gloves according to the present invention

Figure 3 is a perspective view of the polyurethane coated gloves according to the invention

*** Explanation of symbols for the main parts of the drawing ***

1: glove 5: coating layer

10: stirrer 20: blender

21: main mixer 22: auxiliary mixer

30: dipping tank 40: coagulation tank

50: flush tank 60: dryer

Claims (2)

In the manufacturing method of the polyurethane coated gloves; Polyurethane coating solution base is produced by mixing 25-35% by weight of polyurethane resin and 65-75% by weight of dimethylacetamide (DMAC) or dimethyl sulfoxide (DMSO) with stirrer 10 at 60-100 ° C for 2-10 hours. Process; Produces a coating agent that mixes 140 to 190 parts by weight of dimethylacetamide (DMAC), 1 to 5 parts by weight of surfactant, and 0.5 to 3 parts by weight of antifoaming agent with a blender 20 at 20 to 40 ° C based on 100 parts by weight of the polyurethane coating solution base. Process; A dipping step of immersing the glove 1 inserted into the mold in the dipping tank 30 to which the coating agent is supplied; A solidification process of immersing the glove 1 coated with a coating agent in a coagulation bath 40 filled with water at 20 to 40 ° C. to form a coating layer 5 on the surface of the glove 1; A washing step of washing the gloves 1 step by step in a washing tank 50 filled with warm water of 60 to 65 ° C. to elute the solvent contained in the coating layer 5; Method for producing a polyurethane coated gloves, characterized in that it comprises a drying step of the washed gloves. In the manufacturing method of the polyurethane coated gloves; Polyurethane coating solution base is produced by mixing 25-35% by weight of polyurethane resin and 65-75% by weight of dimethylacetamide (DMAC) or dimethyl sulfoxide (DMSO) with stirrer 10 at 60-100 ° C for 2-10 hours. Process; 140 to 190 parts by weight of dimethyl sulfoxide (DMSO), 1 to 5 parts by weight of a surfactant, and 0.5 to 3 parts by weight of an antifoaming agent were mixed with the blender 20 at 20 to 40 ° C based on 100 parts by weight of the polyurethane coating solution base. Process; A dipping step of immersing the glove 1 inserted into the mold in the dipping tank 30 to which the coating agent is supplied; A solidification process of immersing the glove 1 coated with a coating agent in a coagulation bath 40 filled with water at 20 to 40 ° C. to form a coating layer 5 on the surface of the glove 1; A washing step of washing the gloves 1 step by step in a washing tank 50 filled with warm water of 60 to 65 ° C. to elute the solvent contained in the coating layer 5; Method for producing a polyurethane coated gloves, characterized in that it comprises a drying step of the washed gloves.

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