JPH07278924A - Working glove and its production - Google Patents

Abstract

PURPOSE:To obtain a working glove made of extremely tough and scuff-resistant aramid fibers excellent in resistances to water, oils and ultraviolet rays, etc., and further air permeability and operating efficiency. CONSTITUTION:The characteristic of this working glove comprises a substrate glove formed of aramid fibers as a main material and an air-permeable polyurethane layer formed on the surface or in the interior of the substrate or further a continuous polyurethane film formed on the surface of the air-permeable polyurethane layer. Furthermore, this method for producing the working glove is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is extremely tough and scratch resistant, and has excellent oil resistance, water resistance and ultraviolet resistance.
Further, the present invention relates to a work glove that is soft and has excellent flexibility and breathability and has excellent workability.

[0002]

2. Description of the Related Art Conventionally, daily garbage discharged from homes, offices, etc. is collected by a garbage truck. In order to protect the hands from dirt and injuries during recovery work, the worker must have flexibility and extremely high strength aramid fiber, especially Kevlar (trade name manufactured by DuPont), Twaron (trade name). Work gloves are used to improve workability by using work gloves made of para-aramid fiber called Enca Co., Ltd., etc., and from accidents such as cutting or piercing with a piece of glass or metal. Protects workers.

That is, the work gloves made of aramid fiber as described above have such a toughness that para-aramid fibers are used as a material for bulletproof vests, and even if they are cut with a sharp blade, they are not damaged. However, since it is stretchable and flexible like ordinary cotton work gloves, it can protect your hands from dangerous materials and has excellent workability and workability. It is possible to secure sufficient safety at the same time.

[0004]

However, as described above, the work gloves made of aramid fiber and made of work gloves are relatively knitted gloves, and therefore, for example, juice contained in waste or There is another problem that juice or oil from raw garbage, dust, sand, etc. get in through the stitches of the gloves and stain the gloves and hands. Further, the aramid fiber also has a problem that it is inferior in ultraviolet resistance, which is its greatest drawback. Therefore, the object of the present invention is to solve the above-mentioned problems of the prior art, is extremely tough and scratch resistant, and is also excellent in water resistance, oil resistance, UV resistance, etc., and is also excellent in breathability and workability. It is to provide work gloves made of aramid fiber.

[0005]

The above object can be achieved by the present invention described below. That is, the present invention is a work glove characterized by comprising a base glove mainly composed of aramid fiber and a breathable polyurethane layer formed on the surface or inside the base, and a breathable polyurethane layer. The working glove according to claim 1, wherein a polyurethane continuous film is formed on the surface, and the method for producing the same.

[0006]

[Function] By forming a breathable polyurethane layer on the surface of a substrate glove mainly made of aramid fiber or inside the substrate, it is extremely tough and scratch resistant, and further has breathability, water resistance, oil resistance and It is possible to provide work gloves made of aramid fiber, which are excellent in ultraviolet resistance and are also excellent in workability. Further, by forming a continuous polyurethane film on the surface of the breathable polyurethane layer, the water resistance and oil resistance can be further improved. As another aspect, if a glove made of aramid fiber is used as an inner glove and a knitted outer glove made of cotton or the like having a continuous film or a breathable polyurethane layer formed on the surface is combined to form a double structure, In addition to the above-mentioned effects, the inexpensive inner gloves can be used for a long period of time by replacing the inexpensive outer gloves as needed.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described in more detail with reference to preferred embodiments. A first aspect of the work glove of the present invention is characterized by comprising a base glove formed mainly of aramid fiber and a breathable polyurethane layer formed on the surface or inside the base, The second aspect is characterized by comprising an inner glove formed mainly of aramid fiber and an outer glove having a surface with a continuous film or a breathable polyurethane layer.

The base glove used in the present invention is mainly composed of aramid fiber which is highly flexible and has extremely high strength. In the present invention, among aramid fibers, poly (P-phenylene terephthalamide) called Kevlar (trade name, manufactured by DuPont), Twaron (trade name, manufactured by Enca) or Technora (trade name, manufactured by Teijin Limited) is particularly preferable. Preferably used. In order to obtain a base glove having a greater strength, it is possible to knit fine metal fibers into aramid fibers to form a woven or knitted fabric. These aramid fiber gloves themselves can be obtained from the market and used in the present invention.

When a continuous film or a breathable polyurethane layer is provided on the outer glove substrate without forming a polyurethane layer on the surface or inside the substrate glove made of aramid fiber, a double glove is obtained. The outer glove base material is a woven fabric made of a natural fiber such as cotton having excellent water absorption, elasticity and flexibility, or a mixed yarn of a natural fiber and a synthetic fiber such as polyester, polyacetate and polyacrylic. Alternatively, a base glove made of knitted cloth or the like is used. Considering the flexibility, strength, breathability and wearing feeling of gloves, woven or knitted fabric made of cotton or a blended yarn of cotton and synthetic fiber such as polyester fiber, and further knitted base fabric are used. It is preferable to use the outer glove base material used.

A method of forming the breathable polyurethane layer inside the base material of the base gloves made of aramid fiber will be described. As the polyurethane resin used for forming the air-permeable polyurethane layer, any conventionally known one can be used, but a particularly preferred polyurethane resin is a light-resistant polyurethane using an aliphatic polyisocyanate as the polyisocyanate. The resin or elastomer is a hydrolysis-resistant polyurethane resin or elastomer using a polyether polyol or a polycarbonate polyol as the polyol. First, a polyurethane resin solution is prepared by dissolving the above-mentioned polyurethane resin in dimethylformamide, methyl ethyl ketone, or other water-soluble organic solvent suitable for polyurethane resin to a concentration of, for example, 5.0 to 30% by weight. To do.

Next, the hand mold equipped with the base material glove is dipped in the above polyurethane resin solution to sufficiently impregnate the inside of the glove base material with the resin solution and then withdrawn, and after the liquid is drained,
The polyurethane layer is gelated and desolvated by dipping it again in water for solvent removal to form a porous and breathable polyurethane layer. By thoroughly removing the solvent and then drying,
A breathable polyurethane layer having a desired thickness is formed inside the base material of the aramid fiber base material glove, and if it is then released from the hand mold, it has a cross section as schematically shown in FIG. 1 (a). The work gloves of the present invention can be obtained.

Next, a method of forming a breathable polyurethane layer on the surface of the aramid fiber-made base glove will be described. First, the base glove is fitted in a hand mold and immersed in water to impregnate the base glove with water. Alternatively, after putting the base gloves on water, put them on the hand type. Here, the impregnation with water means that when a hand glove fitted with a base material glove is immersed in a polyurethane resin solution, the polyurethane resin is precipitated from the solution by the water impregnated into the base material glove and This is to prevent the polyurethane resin solution from entering the glove base material any further.

Since the base gloves made of aramid fiber used in the present invention are made of hydrophobic fiber and have low impregnating ability with water, the impregnating water contains water-soluble resin and The amount of water retained in the fibers can be increased by containing the surfactant. Examples of the water-soluble resin used in this case include polyvinyl alcohol, polyacrylic acid, polymethacrylic acid, gelatin, starch and agar.
As the surface active agent, any known surface active agent such as a cationic surface active agent, an anionic surface active agent, an amphoteric surface active agent or a nonionic surface active agent can be used.

Next, slowly immerse the hand mold with the base material gloves moistened with water into the polyurethane resin solution from the fingertips, and be careful not to let the resin solution enter the inside of the gloves until the cuffs are sufficiently filled. After being impregnated with the above, it is pulled up, and after the liquid is drained, it is immersed again in water for solvent removal to gelate and solvent remove the polyurethane layer to form a porous and breathable polyurethane layer. By sufficiently removing the solvent and then drying, an air-permeable polyurethane layer having a desired thickness is formed on the surface of the base glove made of aramid fiber, and then, when released from the hand mold, as shown in FIG. 1 (b). A working glove of the present invention having a cross section as schematically shown is obtained.

When the breathable polyurethane layer is formed on the base glove made of aramid fiber by the dry method, the glove is put on the hand mold and slowly dipped in the polyurethane emulsion prepared in advance. , After sufficiently impregnating, slowly pulling up, gelling and drying at 150 to 160 ° C for several minutes,
A breathable polyurethane layer is formed on the surface of a base glove made of aramid fiber. In this case, the amount of the organic solvent used is remarkably small, which is very advantageous in terms of production and environmental protection. In the second aspect of the present invention, the outer glove base material is used instead of the aramid fiber base material glove in the above method, and a continuous film or breathable polyurethane layer is formed on the glove base material surface in the same manner as above. Then, the glove made of the aramid fiber may be used as an inner glove, and both may be combined (see FIG. 2).

[0016]

EXAMPLES Next, the present invention will be described more specifically with reference to examples. In addition, unless otherwise specified, "parts" and "%" in the text are based on weight. Example 1 First, 1,4-butane / ethylene adipate (1,4-butane)
BD / EG = 50/50 molar ratio, molecular weight 2,000) 1
50 parts of ethylene glycol, 15 parts of ethylene glycol and 50 parts of diphenylmethane diisocyanate were reacted at 70 ° C. for 5 hours and 90 ° C. for 2 hours, and a part of this product was diluted with dimethylformamide to a solid content of 30%. This solution is 520
The viscosity was poise / 20 ° C. Solution 1 obtained above
Further, 50 parts of dimethylformamide was added to 00 parts to prepare a hydrophilic organic solvent solution of polyurethane, and this solution was placed in a heat-retaining tank at 30 to 35 ° C. and sufficiently defoamed.

On the other hand, gloves for knitting gloves made of Kevlar fibers are attached to a stainless steel hand mold,
The glove base material is sufficiently impregnated with the resin solution by immersing it in the polyurethane resin solution as it is attached to the stainless steel hand mold. After that, it was slowly pulled up, and when it was drained, it was immersed in water at a temperature of about 40 ° C. to gelate the polyurethane resin and remove the solvent. After the completion of solvent removal, the work gloves were sufficiently dried in a dryer at 90 to 100 ° C. and then taken out from the hand mold to obtain working gloves of the present invention. The obtained glove had a breathable polyurethane layer of about 50 to 100 μm formed in the base material of the base material glove.

When the aramid fiber gloves having the breathable polyurethane layer obtained above were fitted and the work was carried out,
Despite having a polyurethane layer, it has softness and sufficient flexibility, without impairing workability,
Moreover, even if it gets wet with water or oil, it does not seep into the inside of the glove. In addition, it has excellent breathability, and even if it is used for a long time, the inside of the glove does not get stuffy and it is very easy to use. The work gloves obtained as described above were re-immersed in the polyurethane resin solution while still fitted to the handprint,
By drying without dipping in water to form a continuous film of polyurethane resin on the surface, air permeability is reduced, but water resistance and oil resistance are further improved.

Example 2 Gloves made of Kevlar fibers were put on a stainless steel hand mold and dipped in water to be impregnated with water. Next, this base glove is slowly dipped into the same polyurethane resin solution as in Example 1 from the fingertips while being attached to the stainless steel hand mold, taking care not to let the resin solution enter the inside of the glove. On the other hand, it was sufficiently dipped into the cuff, slowly pulled up again, and when the liquid was drained, it was dipped in water at a temperature of about 40 ° C. to gel the polyurethane layer and remove the solvent. After the completion of solvent removal, the work gloves were sufficiently dried in a dryer at 90 to 100 ° C. and then taken out from the hand mold to obtain working gloves of the present invention.

The obtained glove has 50 to 50% of the surface of the base glove.
A breathable polyurethane layer having a thickness of about 100 μm was formed. A part of this polyurethane layer penetrated into the fibers of the base glove and was firmly bonded. When water containing 5% of polyvinyl alcohol was used as the water for impregnation, gloves with less penetration between the base fibers of the polyurethane layer and more flexible were obtained. When the aramid fiber glove having the breathable polyurethane layer obtained above was fitted and the work was carried out, it had the same characteristics as in Example 1 and the flexibility was further improved.

Further, when the obtained glove was fitted and the glass shards were grabbed, the polyurethane layer was slightly scratched, but the base material glove made of aramid fiber was not scratched, and, of course, was not damaged. It didn't get scratched. Also, an aramid fiber glove having the obtained breathable polyurethane layer,
For comparison, a light resistance test was performed on an aramid fiber glove that was not provided with a breathable polyurethane layer, and the work gloves of the present invention showed that the glove made of aramid fiber was not coated with the breathable polyurethane layer. It was extremely excellent in light resistance.

Example 3 A base glove made of the same aramid fiber as used in Example 2 was immersed in water containing 5% starch and 2% surfactant. Thereafter, the polyurethane resin solution used in Example 2 was used to form the breathable polyurethane layer integrally on the surface of the base glove made of aramid fiber in the same manner as in Example 2. When the aramid fiber gloves having the breathable polyurethane layer obtained above were fitted and the work was carried out in the same manner as in Example 2, the workability was excellent and the water resistance was good as in Example 2. Nevertheless, the breathability was excellent and my hands did not get damp during work. Furthermore, when the light resistance was similarly tested, it was confirmed that the light resistance was also excellent.

Example 4 First, a knitted fine knitted thin base material glove made of cotton was prepared, impregnated in water, and appropriately squeezed,
The air in the cloth was replaced with water. Next, this wet glove was put on a hand mold, the same polyurethane solution as that used in Example 1 was used, and as in Example 1, cotton knitted base gloves made of cotton by the wet method. A breathable polyurethane layer was formed on the surface of the. The cotton glove having the breathable polyurethane layer formed as described above was used as an outer glove, the work gloves knitted with aramid fiber used in Example 1 was used as an inner glove, and an aramid fiber glove and a cotton glove were used. The working gloves of this example having a double structure of

When the double glove obtained as described above was put on and dust collection work was performed, it was easy to work because the double glove was soft, flexible and stretchable. Further, since the cotton gloves having the breathable polyurethane layer prevent the invasion of sap or oil, the sap or the like does not seep into the hands and is excellent in water resistance and oil resistance. Furthermore, the inside of the gloves did not get damp even after long-term use. In addition, since stains on aramid fiber gloves can be sufficiently prevented with cotton gloves, if the gloves are soiled, only the outer gloves, cotton gloves, need to be replaced. The useful life of the material gloves can be further extended.

Example 5 First, a work gloves knitted base material made of aramid fiber similar to that used in Example 1 is prepared. Next, 1,4-butane ethylene adipate (average molecular weight 1,000, hydroxyl value 1
12) 1,000 parts, 1,4-butanediol 31 parts,
MEK with 333 parts of diphenylmethane diisocyanate
It was added to 3,183 parts and reacted at 70 ° C. for 8 hours to obtain a polyurethane resin solution having a solid content of 30% and an average molecular weight of 65,000. Then, to the above resin solution, 130 parts of ethylene glycol and 524 parts of diphenylmethane diisocyanate were added, and after reacting at 60 ° C. for 10 hours, further,
Add 1,526 parts of MEK to homogenize, cool to room temperature with stirring, and average molecular weight of polyurethane is 12
Thus, a milky white polyurethane dispersion liquid having a particle size of 16,000 or less and a precipitated particle size of 1 μm or less and a solid content of 30% was obtained.

Polyurethane dispersion 100 obtained above
2 parts of a urethane-based emulsifier, 20 parts of MEK, 20 parts of xylene and 20 parts of water were further added to the parts, and the mixture was stirred with a homomixer to prepare a polyurethane emulsion. On the other hand, the above gloves made of aramid fiber are attached to a stainless steel glove manufacturing mold in a dry state. The gloves attached to this hand mold are slowly dipped in the above polyurethane emulsion to sufficiently impregnate them into the hand, and then slowly pulled up again, then 150-1
After gelling and drying at 60 ° C. for several minutes, a breathable polyurethane layer was formed on the entire surface of the base glove.

The breathable polyurethane layer thus formed on the surface of the glove made of aramid fiber is also formed only on the surface of the glove as in Example 1, and is not impregnated to the inside of the base glove, The obtained glove was soft and sufficiently flexible without the flexibility and stretchability of work gloves being significantly impaired. Further, when the gloves obtained in this Example were fitted and worked, and a usage test was carried out, they were soft and flexible as in Example 1 and were easy to use.

[0028]

[Effect] As described above, according to the present invention, by forming a breathable polyurethane layer on the surface of a base glove mainly composed of aramid fibers or inside the base,
It is possible to provide work gloves made of aramid fiber, which are extremely tough and scratch resistant, and also have excellent breathability, water resistance, oil resistance, ultraviolet resistance, and workability.
Further, by forming a continuous polyurethane film on the surface of the breathable polyurethane layer, the water resistance and oil resistance can be further improved. As another aspect, if a glove made of aramid fiber is used as an inner glove and a knitted outer glove made of cotton or the like having a continuous film or a breathable polyurethane layer formed on the surface is combined to form a double structure, In addition to the above-mentioned effects, the inexpensive inner gloves can be used for a long period of time by replacing the inexpensive outer gloves as needed.

[0029]

[Brief description of drawings]

FIG. 1 is a schematic view of an example of work gloves according to the present invention,
(A) And (b) is an AA 'arrow cross section of a glove.

FIG. 2 is a schematic view of another double-layer work gloves of the present invention.

Claims (6)

[Claims] 1. A work glove comprising a base glove mainly composed of aramid fiber and a breathable polyurethane layer formed on the surface or inside the base. 2. The work glove according to claim 1, wherein a continuous polyurethane film is formed on the surface of the breathable polyurethane layer. 3. A working glove comprising an inner glove mainly composed of aramid fiber and an outer glove having a polyurethane layer formed on the surface thereof. 4. Inside of the base material of the base glove, after the base glove made mainly of aramid fiber is mounted on the hand mold, the glove is immersed in a polyurethane resin solution dissolved in a water-soluble organic solvent. A method for producing working gloves, which comprises impregnating a polyurethane resin with a resin, pulling it up, and then immersing it in water to remove the solvent to form a breathable polyurethane layer inside the substrate of the substrate glove. 5. A base glove mainly composed of aramid fiber is attached to a hand mold to impregnate it with water, or after the glove impregnated with water is attached to the hand mold, the glove is water-soluble. A method for producing working gloves, comprising immersing in a polyurethane resin solution dissolved in a water-soluble organic solvent, pulling it up, and then immersing in water to remove the solvent to form a breathable polyurethane layer on the surface of the base glove. 6. The method for producing working gloves according to claim 4, wherein a polyurethane continuous film is formed on the surface of the breathable polyurethane layer.