JP2018016898A - Glove and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a glove having superior wear resistance and durability.SOLUTION: At least the finger part 13 of a fiber made base glove 12 is covered with vulcanized rubber 14 in the glove 11 of the present invention. In this glove, the vulcanized rubber 14 is vulcanized rubber composition containing rubber (A) and cellulose fiber (B); the average fiber diameter of the cellulose fiber (B) is 2-1000 nm; the average fiber length is 0.1-1000 μm; and the contents of cellulose fiber (B) for rubber (A) 100 weight is 0.05-35 weight.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a glove coated with vulcanized rubber. Moreover, it is related with the manufacturing method of such a glove.

  2. Description of the Related Art Conventionally, gloves in which the surface of a fiber glove (hand) is covered with vulcanized rubber have been widely used as work gloves (for example, Patent Document 1). However, when such gloves are used for civil engineering work, forestry work, fishing work, etc., the coating layer is worn and damaged in a short period of time, and there is a problem in durability.

  As a method for improving the wear damage of such a covering layer, as shown in FIG. 5, Patent Document 2 discloses latex on the thumb cover portion 2 and index finger cover portion 3 of the hand 1 and the crotch portion 7 therebetween. A work glove is described in which a first reinforcing film 8 made of rubber is formed, and then a second reinforcing film 9 is further formed. Patent Document 2 describes that a long life can be achieved by forming two layers of reinforcing films where a strong force is applied during the work shown in FIG. However, depending on the application, the reinforcing films 8 and 9 are worn and damaged in a short period of time, and there is still a problem in durability.

JP-A-5-93302 JP 2004-285528 A

  The present invention has been made to solve the above problems, and an object thereof is to provide a glove having excellent wear resistance. Moreover, it aims at providing the simple manufacturing method of such a glove.

  The above-described problem is a glove in which at least a finger portion of a fiber hand is covered with vulcanized rubber, and the vulcanized rubber vulcanizes a rubber composition containing rubber (A) and cellulose fiber (B). The cellulose fiber (B) has an average fiber diameter of 2 to 1000 nm, an average fiber length of 0.1 to 1000 μm, and the cellulose fiber (B) with respect to 100 parts by mass of the rubber (A). This is solved by providing a glove having a content of 0.05 to 35 parts by mass.

  At this time, the glove is coated with a vulcanized rubber not containing the cellulose fiber (B) at least a part of the fiber hand, and at least a part of the surface of the vulcanized rubber contains the cellulose fiber (B). It is preferably one that is coated with vulcanized rubber.

  The above-described problem can also be solved by providing a method for producing the glove that is vulcanized after the fiber hand is immersed in a latex in which rubber (A) and cellulose fiber (B) are dispersed and dried.

  It is preferable that the fiber hand is composed of a knitted fabric. The rubber (A) is also preferably at least one selected from the group consisting of natural rubber, acrylonitrile-butadiene rubber, styrene-butadiene rubber and chloroprene rubber.

  Since the glove of the present invention has excellent wear resistance, it has excellent durability. According to the manufacturing method of the present invention, such a glove can be easily manufactured.

In Example 1, it is the schematic at the time of dipping a standard hand in the emulsion B. FIG. In Example 2, it is the schematic at the time of dipping a standard hand in the emulsion B. FIG. 1 is a schematic view of a glove obtained in Example 1. FIG. 3 is a schematic view of a glove obtained in Example 2. FIG. It is an external view of the glove in which the 1st reinforcement film described in JP, 2004-285528, A and the 2nd reinforcement film were further formed.

  FIG. 3 is a schematic diagram of an example of the glove 11 of the present invention described in Example 1 described later, and FIG. 4 is a schematic diagram of an example of the glove 11 of the present invention described in Example 2. The glove of the present invention will be described with reference to these drawings.

  The glove 11 of the present invention is a glove 11 in which at least a finger portion 13 of a fiber hand 12 is covered with a vulcanized rubber 14, and the vulcanized rubber 14 comprises rubber (A) and cellulose fiber (B). The rubber composition is obtained by vulcanization, the cellulose fiber (B) has an average fiber diameter of 2 to 1000 nm, an average fiber length of 0.1 to 1000 μm, and rubber (A) 100 mass. Content of the cellulose fiber (B) with respect to parts is 0.05 to 35 parts by mass.

  The fiber hand 12 (fiber glove body) used in the present invention is not particularly limited as long as it is a fiber glove, but a fabric made of knitted fabric or the like can be suitably used. Examples of the fibers constituting the hand 12 include various known fibers such as natural fibers such as cotton and hemp, and synthetic fibers such as nylon, polyester, acrylic, polyurethane, rayon, aramid, and sufu. These fibers may be used alone or in combination of two or more.

  The rubber (A) contained in the rubber composition used in the present invention is not particularly limited, and natural rubber (NR), acrylonitrile-butadiene rubber (NBR), styrene-butadiene rubber (SBR), chloroprene rubber (CR ), Butadiene rubber (BR), isoprene rubber (IR), etc., among which at least one selected from the group consisting of natural rubber, acrylonitrile-butadiene rubber, styrene-butadiene rubber and chloroprene rubber (CR). Preferably there is. Moreover, it is preferable that rubber | gum (A) is latex rubber from the point which manufacture of a glove is easy.

  The rubber composition used in the present invention contains cellulose fibers (B) having an average fiber diameter of 2 to 1000 nm and an average fiber length of 0.1 to 1000 μm. The wear resistance is significantly improved by coating the handle 12 with the vulcanized rubber 14 containing the cellulose fiber (B) having such a thin fiber diameter.

  Cellulose fibers having an average fiber diameter of less than 2 nm are difficult to obtain by ordinary methods and are not practical for industrial use. The average fiber diameter of the cellulose fiber (B) is preferably 5 nm or more, and more preferably 10 nm or more. On the other hand, when the average fiber diameter exceeds 1000 nm, the effect of improving wear resistance is not achieved. The average fiber diameter of the cellulose fiber (B) is preferably 500 nm or less. In addition, the average fiber diameter of the cellulose fiber (B) in this invention is the number average fiber diameter computed by microscope observation.

  When the average fiber length of the cellulose fiber (B) is less than 0.1 μm, the effect of improving the wear resistance is not achieved. The average fiber length of the cellulose fiber (B) is preferably 1 μm or more, more preferably 10 μm or more, and further preferably 50 μm or more. On the other hand, when the average fiber length of the cellulose fiber (B) exceeds 1000 μm, the effect of improving the wear resistance is not achieved. The average fiber length is preferably 800 μm or less. In addition, the average fiber length of the cellulose fiber (B) in this invention is the number average fiber length computed by microscope observation. In the cellulose fiber (B), the ratio of the average fiber length to the average fiber diameter (average fiber length / average fiber diameter) is preferably 50 or more, and more preferably 100 or more.

  The cellulose fiber (B) used for this invention will not be specifically limited if it has the above-mentioned average fiber diameter and average fiber length, A general fibrillated cellulose fiber can be used conveniently. Examples of the raw material for the fibrillated cellulose fiber include wood, firewood, bamboo, bagasse, firewood, firewood, and rice husk. The fibrillation can be performed by applying a mechanical shearing force to the obtained cellulose fiber using a beater, a homogenizer, or the like. Moreover, fibrillation of cellulose fibers can also be performed by chemical treatment. From the viewpoint of improving mechanical properties, the cellulose fiber (B) preferably contains 2 to 30% by mass of lignin. Lignin is a component contained in the raw material. When performing fibrillation, the cellulose fiber (B) containing a lignin is obtained by adjusting the removal rate of a lignin.

  Content of the cellulose fiber (B) in the said rubber composition is 0.05-35 mass parts with respect to 100 mass parts of rubber (A). When the content of the cellulose fiber (B) is less than 0.05 parts by mass, the effect of improving the wear resistance is not achieved. 0.5 mass parts or more is suitable for content of a cellulose fiber (B). On the other hand, when the content of the cellulose fiber (B) exceeds 10 parts by mass, the cellulose fiber (B) aggregates and it becomes difficult to disperse the cellulose fiber (B) in the rubber composition. , Because the resulting glove is too hard. The content of the cellulose fiber (B) is preferably 10 parts by mass or less, more preferably 7 parts by mass or less, and further preferably 5 parts by mass or less.

  The rubber composition preferably contains a vulcanizing agent, and the content thereof is usually 0.1 to 5 parts by mass with respect to 100 parts by mass of the rubber (A). The vulcanized rubber 14 that covers the gloves 11 can be formed by a method of blending and heating the vulcanizing agent. The method of vulcanization is not particularly limited, but sulfur vulcanization and peroxide vulcanization are employed. As a vulcanizing agent for sulfur vulcanization, sulfur or a sulfur-containing compound is used. An organic peroxide is used as a vulcanizing agent for vulcanizing the peroxide.

  The rubber composition may contain various additives used in other general rubber products as long as the effects of the present invention are not impaired. Examples of such additives include vulcanization accelerators, anti-aging agents, anti-scorch agents, surfactants, zinc oxide, stearic acid, softeners, thickeners, fillers other than cell source fibers (B), and the like. Can be mentioned. The total content of other additives in the rubber composition is not particularly limited, but is usually 1 to 40 parts by mass with respect to 100 parts by mass of the rubber (A).

  The method for producing the rubber composition is not particularly limited, and a method of vulcanizing and molding the sheet-like rubber composition on the fiber hand 12 by hot pressing, or on the surface of the fiber hand 12 For example, a method in which an adhesive is attached and the sheet-like rubber composition is pressure-bonded is vulcanized.

  The fiber hand 12 is immersed in a latex 15 in which rubber (A) and cellulose fiber (B) are dispersed, dried and then vulcanized, whereby at least the finger portion 13 of the fiber hand 12 is vulcanized rubber 14. The method of obtaining a glove coated with is a preferred embodiment of the present invention. FIG. 1 is a schematic view when the fiber hand 12 is immersed in a latex 15 (emulsion) in which rubber (A) and cellulose fiber (B) are dispersed in Example 1 described later. In Example 2, it is the schematic at the time of immersing the fiber hand 12 in which the rubber composition layer 16 which does not contain a cellulose fiber (B) was formed in the latex 15 in which the rubber (A) and the cellulose fiber (B) were dispersed. is there. With reference to these drawings, the manufacturing method of the glove 11 of this invention is further demonstrated.

  The latex 15 in which the rubber (A) and the cellulose fiber (B) are dispersed is prepared by adding the cellulose fiber (B) and, if necessary, various additives described above to the rubber (A) latex. Can do. The content of rubber (A) in latex 15 in which rubber (A) and cellulose fiber (B) are dispersed is usually 30 to 80% by mass. After the latex 15 is prepared, it is preferably aged at 20 to 80 ° C. for 1 hour to 7 days and then used for the production of the gloves 11.

  Before dipping the fiber master 12 in the latex 15, it is preferable to treat the fiber master 12 with a coagulation liquid in advance. When latex 15 penetrates into the fiber hand 12 and enters the fiber hand 12, protrusions of vulcanized rubber are formed inside the glove 11 and the touch may be deteriorated. By previously processing the fiber hand 12 with the coagulation liquid, the formation of such protrusions is reduced. Examples of the coagulant contained in the coagulation liquid include calcium nitrate and calcium chloride. Examples of the liquid medium include water, alcohol (methanol, ethanol, etc.), a mixed solution thereof, and the like. The content of the coagulant in the coagulation liquid is usually 2 to 40% by mass. On the other hand, from the viewpoint of reducing the number of steps and improving cost, a method (straight method) in which the fiber hand 12 is immersed in the latex 15 without performing the treatment with the coagulating liquid is preferable.

  The rubber composition layer containing the rubber (A) and the cellulose fiber (B) is formed by immersing the fiber hand 12 attached to the three-dimensional hand mold 17 in the latex 15 and then pulling it up for a while. The

  Drying and vulcanization are performed by heat-treating the fiber hand 12 on which the rubber composition layer containing the cellulose fiber (B) is formed using a heating furnace or the like. Usually, the processing temperature at this time is 60 to 150 ° C., and the processing time is 20 to 120 minutes. Thus, the glove 11 shown in FIG. 3 in which the fiber hand 12 is directly covered with the vulcanized rubber 14 containing the rubber (A) and the cellulose fiber (B) can be obtained. In the glove 11 shown in FIG. 3, all finger and palm portions are covered with a vulcanized rubber 14 containing cellulose fibers (B). However, the present invention is not limited to this. And vulcanized rubber 14 containing cellulose fiber (B). What is necessary is just to coat | cover the part to which a force is added at the time of use with the vulcanized rubber 14, and should just adjust the part coat | covered according to a use.

  As shown in FIG. 4, the glove 11 of the present invention is such that at least a part of the fiber hand 12 is covered with a vulcanized rubber 18 containing no cellulose fiber (B), and at least the surface of the vulcanized rubber 18 is It is more preferable that a part thereof is coated with vulcanized rubber 14 containing rubber (A) and cellulose fiber (B). The glove 11 formed a rubber composition layer 16 not containing cellulose fibers (B) by immersing and pulling up the fiber master 12 in latex not containing cellulose fibers (B) for a while. Later, the rubber (A) and the cellulose fiber (B) are further immersed in the latex 15 (see FIG. 2), dried, and then vulcanized. At this time, as in the case where the fiber hand 12 is directly covered with the vulcanized rubber 14 containing the cellulose fiber (B), at least a part of the finger is vulcanized containing the rubber (A) and the cellulose fiber (B). What is necessary is just to coat | cover with the rubber 14. The glove 11 thus obtained is preferable because it is flexible.

  The glove 11 covered with the vulcanized rubber 14 containing the cellulose fiber (B) having a thin fiber diameter thus obtained has excellent wear resistance, and therefore has excellent durability. Therefore, it is suitably used as a work glove or the like used in civil engineering work, mountain forest work, fishery and the like.

  Hereinafter, the present invention will be described more specifically with reference to examples.

[Preparation of emulsion A]
An aqueous dispersion of sulfur (sulfur content 50 mass%) was prepared by adding a dispersant and water to the sulfur powder and then pulverizing with a ball mill for 24 hours. With respect to NR latex (rubber content 60 mass%, HA type), the above-mentioned sulfur aqueous dispersion, vulcanization accelerator PX (50 mass% aqueous dispersion), vulcanization accelerator TP and zinc oxide (50 mass%) Aqueous dispersion) was sequentially added and sufficiently stirred to be uniform. At this time, 1 part by mass of sulfur, 0.5 part by mass of vulcanization accelerator PX, 0.2 part by mass of vulcanization accelerator TP, and 1 part by mass of zinc oxide were added to 100 parts by mass of NR latex in terms of dry mass. The emulsion A thus obtained was aged at 25 ° C. for 1 day and used for the production of gloves.

[Preparation of emulsion B]
In addition to the NR latex, the average fiber diameter is 270 nm, the maximum fiber length is 500 μm, the lignin content of the cellulose fiber is about 8% by mass, the cellulose fiber content in the aqueous dispersion is 10% by mass, and the water content of the aqueous dispersion is 90% by mass. % Containing the cellulose fiber in the same manner as the emulsion A, except that 2 parts by mass of the cellulose fiber was added to 100 parts by mass of the NR latex by dry mass. Emulsion B was prepared and used for the production of gloves.

Example 1
A glove (original hand 12) obtained by knitting polyester yarn was attached to an aluminum three-dimensional hand mold 17 and then heated in a heating furnace at 50 ° C. for 15 minutes. The hand 12 was dipped in a coagulation liquid (an aqueous solution in which 10 parts by mass of calcium nitrate was dissolved in 100 parts by mass of water) and then lifted. At this time, the hand 12 was soaked in the coagulation liquid so that the coagulation liquid permeated above the part where the emulsion B was immersed. A rubber composition layer containing cellulose fibers was formed by immersing the hand 12 in emulsion B (latex 15) to a desired depth and then pulling it up for 80 seconds. A schematic diagram when the hand 12 is immersed in the emulsion B (latex 15) is shown in FIG. The raw hand 12 on which the rubber composition layer was formed was heat-treated in a heating furnace at 120 ° C. for 60 minutes to perform drying and vulcanization. Thus, a glove 11 covered with vulcanized rubber 14 containing cellulose fiber was obtained. The schematic of the glove 11 obtained in FIG. 3 is shown. A portion of the glove 11 covered with the vulcanized rubber 14 was cut into a predetermined size, and a test piece was used, and an abrasion test was performed using a Martindale abrasion tester. The wear resistance of the glove 11 was evaluated from the number of movements until the test piece penetrated using sandpaper having a particle size of 180 as an abrasive. The results are shown in Table 1.

Comparative Example 1
Except that the emulsion A containing no cellulose fiber was used instead of the emulsion B, a glove coated with a vulcanized rubber containing no cellulose fiber was prepared in the same manner as in Example 1 and then evaluated for wear resistance. Went. The results are shown in Table 1.

Table 1

Example 2
A rubber composition layer 16 containing no cellulose fibers was formed on the hand 12 in the same manner as in Example 1 except that the emulsion A containing no cellulose fibers was used instead of the emulsion B. Subsequently, after the finger part 13 of the hand 12 on which the rubber composition layer 16 is formed is dipped in the emulsion B (latex 15) and then pulled up, the rubber composition layer containing cellulose fibers is formed by letting it blend for 120 seconds. Formed. FIG. 2 shows a schematic diagram when the hand 12 is immersed in the emulsion B (latex 15). Drying and vulcanization were performed by heat-treating the hand 12 in a heating furnace at 120 ° C. for 60 minutes. In this way, a glove 11 was obtained which was coated with vulcanized rubber 18 containing no cellulose fiber and the finger portion 13 was further coated with vulcanized rubber 14 containing cellulose fiber. FIG. 4 shows a schematic view of the glove 11 obtained. A finger piece 13 of the obtained glove 11 (a two-layer structure portion of a vulcanized rubber 18 containing no cellulose fiber and a vulcanized rubber 14 containing a cellulose fiber) cut into a predetermined size was used as a test piece. The abrasion test was performed using a Martindale abrasion tester. The wear resistance of the glove 11 was evaluated from the number of movements until the test piece penetrated using sandpaper having a particle size of 180 as an abrasive. The results are shown in Table 1.
Comparative Example 2
A vulcanized rubber 18 containing no cellulose fibers was used in the same manner as in Example 2 except that the emulsion A containing no cellulose fibers was used instead of the emulsion B when forming the vulcanized rubber covering the finger portion 13. After obtaining a glove 11 that was coated and further coated with vulcanized rubber in which the finger portion 13 did not contain cellulose fibers, the wear resistance was evaluated. The results are shown in Table 1.

DESCRIPTION OF SYMBOLS 11 Gloves 12 Textile hand 13 Finger part 14, 18 Vulcanized rubber 15 Latex 16 Rubber composition layer 17 Three-dimensional hand type

Claims (5)

A glove in which at least a finger portion of a fiber hand is covered with vulcanized rubber,
The vulcanized rubber is obtained by vulcanizing a rubber composition containing rubber (A) and cellulose fiber (B),
The average fiber diameter of the cellulose fiber (B) is 2-1000 nm, the average fiber length is 0.1-1000 μm, and the content of the cellulose fiber (B) with respect to 100 parts by mass of the rubber (A) is 0.05- Gloves that are 35 parts by weight.   At least a part of the fiber hand is coated with a vulcanized rubber not containing cellulose fiber (B), and at least a part of the surface of the vulcanized rubber is covered with a vulcanized rubber containing cellulose fiber (B). The glove according to claim 1.   The glove according to claim 1 or 2, wherein the textile hand is composed of a knitted fabric.   The glove according to any one of claims 1 to 3, wherein the rubber (A) is at least one selected from the group consisting of natural rubber, acrylonitrile-butadiene rubber, styrene-butadiene rubber and chloroprene rubber.   The method for manufacturing a glove according to any one of claims 1 to 4, wherein the fiber hand is immersed in a latex in which rubber (A) and cellulose fiber (B) are dispersed and dried, followed by vulcanization.