JP2011256487A - Glove and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a glove excellent in properties for protecting the hand of a user, drastically improved in easiness in flexion of fingers, and also hard to cause slippage while used: and to provide a method for efficiently producing the glove.SOLUTION: The glove 1 is structured as follows: the whole of the glove is integrally formed with rubber or resin film 3; and a stretchable structure 9 stretchable in the length direction of each of finger parts 6 is formed at least at the back side of each of the finger parts 6. The method for producing the glove comprises: preparing a hand mold having a three-dimensional shape corresponding to the whole shape of the glove and provided with a three-dimensionally-shaped part forming the basis of the stretchable structure; soaking the hand mold in rubber- or synthetic resin-containing liquid followed by pulling up the hand mold so as to make the liquid adhere to the surface of the hand mold; solidifying the liquid to form the rubber or resin film; and thereafter peeling the film from the hand mold.

Description

  The present invention relates to a glove that is integrally formed of a rubber or resin film as a whole and a method for manufacturing the glove.

Gloves, which are integrally formed of a rubber or resin film as a whole, are used in a large number of applications in situations such as general homes, factories, medical sites, and sports.
The purpose of using the gloves varies depending on the application, but protects hands from heat and cold, protects hands from sharp objects, protects hands from hygienic unclean things such as viruses, etc. Protecting your hands is often the original role of gloves.

The protection of gloves depends on the material and thickness, but these are selected depending on what object the user wants to protect his hands from.
For example, if you do not want to wet your hands simply by water work, an ultra-thin so-called disposable glove made of an elastomeric material such as natural rubber or a resin such as vinyl chloride resin is sufficient.

However, thicker gloves are required to protect hands from sharp objects such as broken glass and needles, or hot water. This is due to the obvious reason that gloves are inherently thicker and more protective.
However, as the thickness of the glove increases, it becomes difficult to bend and stretch the finger, and in particular, the finger. For this reason, if the operation of frequently grabbing an object in a long work is repeated, the grip strength gradually decreases. This not only reduces workability and efficiency for the glove user, but also causes fatigue of the arm.

Thinning gloves can eliminate these problems, but at the same time, the protective function of the glove is lost.
As a result, users must use protection and ease of bending and stretching their fingers according to the purpose of use, and if protection is required, they must sacrifice the ease of bending and stretching their fingers. . For this reason, gloves that satisfy both the protection and the ease of bending and extending fingers at a high level have long been desired.

In addition, the conventional glove has a problem that when the finger is repeatedly bent and stretched, the glove gradually shifts in the fingertip direction, and the user needs to put on the glove every time.
As means for solving these problems, when the finger joint portion of the glove is bent inward, the glove (Patent Document 1) that can move the finger joint smoothly or when the glove is stretched A glove (Patent Document 2) or the like in which an aperture part that expands and contracts is provided at the wrist or finger joint has been proposed.

  These gloves certainly make it easier to bend and stretch fingers than conventional gloves. However, the effect is not sufficient, and there is a problem that the effect cannot be obtained if the position of the joint of the glove and the joint of the hand do not completely match because there are individual differences in the position of the human joint. Moreover, the problem that the glove is displaced in the fingertip direction during use still remains.

JP 2007-262642 A JP-A-2005-9035

  An object of the present invention is to provide a glove that is excellent in the protection of the user's hand, is greatly improved in the ease of bending and stretching the finger, and is difficult to slip off during use, and an efficient manufacturing method for the glove. It is to provide.

The present invention is a glove that is integrally formed of a rubber or resin film, including a glove body having a plurality of finger parts, and at least on the back side of the finger part in the back side region of the glove. The present invention is characterized in that a stretchable structure is provided that can be stretched in the length direction of the finger portion.
When a user of a glove tries to bend his / her finger, a stress is applied to the region on the back side of the finger part of the rubber or resin film that constitutes the glove to extend the region in the length direction of the finger part. It is done.

Then, due to the elasticity of the rubber or resin itself forming the film, a tensile stress is generated in the region in accordance with the applied stress in order to shrink the film in the direction opposite to the stretching direction. This tensile stress causes difficulty in bending and stretching the fingers or causing the gloves to slip during use.
For example, when a glove tries to bend a finger in a state where the glove is in close contact with the back of the user's hand, wrist, etc., the tensile stress is a direction in which the finger is bent with respect to each joint or fingertip of the user's finger. Since it works in the opposite direction, that is, in the direction in which the finger is intended to bend and prevents the finger from being bent, it becomes difficult to bend and stretch the finger.

Also, if the glove tries to bend the finger in a free state where the glove is not in close contact with the back of the user's hand or wrist, the tensile stress will pull the part corresponding to the back of the hand or the wrist toward the fingertip side. The gloves will slip because they work.
On the other hand, according to the glove of the present invention, when the user tries to bend his / her finger, the region provided with the stretchable structure of the film made of rubber or resin greatly expands with a smaller stress than other regions, and Relieve tensile stress. Therefore, according to the present invention, it is possible to provide a glove that has an appropriate thickness and is excellent in the protection of the user's hand, greatly improves the ease of bending and stretching the finger, and is difficult to slip during use. Can do.

The stretchable structure is preferably formed over the entire length from the region corresponding to the joint at the base of the finger to the fingertip. Thereby, the easiness of bending and extending the finger can be improved regardless of the position of the joint of the user's finger.
The stretchable structure may be formed continuously from the fingertip so as to cover not only the aforementioned range but also the entire region on the wrist side from the region corresponding to the joint at the base of the finger among the region on the back side of the glove. Good.

In consideration of relieving tensile stress as efficiently as possible in the shape as simple as possible, the stretchable structure has a concave groove along the cross direction with the length direction of the finger portion on the back side surface of the finger portion. It is preferable that a plurality of them are arranged in the length direction.
In the stretchable structure composed of the plurality of concave grooves, it is preferable that the formation pitch between the adjacent concave grooves is 5.5 mm or less in consideration of more efficiently relieving the tensile stress.

Further, the concave groove has a substantially V-shaped cross section by a pair of inclined surfaces arranged to be inclined from the surface on the back side of the finger portion toward the rear surface so as to intersect each other at substantially the center in the width direction of the concave groove. Preferably, the angle formed by the two inclined surfaces is 5 ° or more and 90 ° or less in consideration of more efficiently relieving the tensile stress.
Further, the thickness of the rubber or resin film is preferably set to be 0.2 mm or less smaller than the other part at the deepest part of the concave groove in consideration of more efficiently relieving the tensile stress.

The method for producing a glove of the present invention for producing the glove of the present invention comprises:
A hand mold having a three-dimensional shape corresponding to the overall shape of the glove and having a three-dimensional shape portion that is the basis of the telescopic structure on at least the back side of the finger portion in the back side region of the glove is prepared. A step of attaching the liquid to the surface of the hand mold by immersing the hand mold in a liquid containing rubber or resin and then pulling it up;
Solidifying the adhered liquid to form the rubber or resin film;
Separating the film from the hand mold to obtain a glove.

  According to the production method of the present invention, the glove of the present invention can be produced at high production without using a special process for forming a stretchable structure on the glove, only by using the hand mold on which the three-dimensional shape portion is formed. Therefore, it becomes possible to manufacture efficiently.

  As described above, according to the present invention, the user's hand is excellent in protection, the ease of bending and stretching of the finger is greatly improved, and the glove that is difficult to slip during use, and the efficiency of the glove are improved. A manufacturing method.

It is a perspective view which shows the glove main body which is the principal part of an example of embodiment of the glove of this invention. It is the side view of a finger part among the gloves of the example of FIG. 1, and sectional drawing to which the part was expanded. It is a perspective view which shows the part of the glove body of the hand type used when manufacturing the glove of the example of FIG. 1 with the manufacturing method of this invention. It is the side view of a finger part among the hand molds of the example of FIG. 3, and the side view which expanded the part. It is a perspective view which shows the glove main body which is the principal part of the other example of embodiment of the glove of this invention.

FIG. 1 is a perspective view showing a glove body which is a main part of an example of an embodiment of the glove of the present invention. FIG. 2 is a side view of a finger part of the glove in the example of FIG. 1 and a cross-sectional view in which a part thereof is enlarged.
With reference to both figures, the glove 1 of this example is formed integrally with a rubber or resin film 3 including the glove body 2. Although not shown, the glove body 2 is formed with a sleeve portion having an arbitrary length, and one end of the sleeve portion is opened as a cuff for a user to put his hand.

The glove body 2 includes a palm portion 5 that is continuous with the sleeve portion 4 via the wrist portion 4 and a plurality of finger portions 6 that are continuous with the palm portion 5, corresponding to the shape of the hand as in the prior art.
On the surface of the back side of each finger portion 6, a concave groove 8 is formed along the length direction of the finger portion 6 and across the entire length from the region 7 corresponding to the joint at the base of the finger to the fingertip. By arranging a plurality in the length direction, a stretchable structure 9 that is stretchable in the length direction of the finger portion 6 is configured.

In addition, each of the concave grooves 8 is a pair of slopes arranged so as to be inclined from the back surface 10 to the back surface 11 of the finger portion 6 so as to intersect each other at the approximate center in the width direction of the concave groove 8. The surface 12 has a substantially V-shaped cross section.
When the expansion / contraction structure 9 composed of the concave groove 8 is provided on the back side surface of each finger part 6, the region of the membrane 3 where the expansion / contraction structure 9 is provided can be greatly expanded with a smaller stress than the other regions, and the gloves The tensile stress generated when the user 1 tries to bend the finger is relieved. Therefore, the ease of bending and extending the finger can be greatly improved. Further, it is possible to make it difficult to slip the glove 1 from the hand during use.

In the stretchable structure 9, the formation pitch P ₁ between adjacent concave grooves 8 makes the region of the film 3 provided with the stretchable structure 9 easier to stretch when stress is applied, thereby making the tensile stress more efficient. In consideration of well relaxation, it is preferably 5.5 mm or less. Note the lower limit of the formation pitches P ₁ until the width W ₁ of the groove 8, concave groove 8 with each other that is adjacent is possible to state in contact without any gap.

Referring to FIG. 2, each of the grooves 8 is inclined from the upper surface 10 on the back side of the finger portion 6 toward the rear surface (the inner surface of the glove 1) 11 so as to intersect with each other substantially at the center in the width direction. Are formed in a substantially V-shaped cross section.
The angle formed by the two inclined surfaces 12 in the concave groove 8 is considered to make the region of the film 3 provided with the stretchable structure 9 easier to stretch when stress is applied, and to relieve the tensile stress more efficiently. Then, it is preferably 5 ° or more, particularly 45 ° or more, and preferably 90 ° or less.

In addition, in the concave groove 8, when stress is applied, considering that the region of the film 3 provided with the stretchable structure 9 is more easily stretched and the tensile stress is relaxed more efficiently, the thickness of the membrane 3 (minimum thickness) _{T 2} are preferably set thickness (usually thickness) 0.2 mm or more than _{T 1} small film 3 at the other site. That is, it is preferable that T ₁ −T ₂ ≧ 0.2 mm.

However, when the minimum thickness T ₂ is too small strength of the glove 1 is reduced, it becomes easier to tearing the membrane 3 in the portion of the concave groove 8, that the minimum thickness T ₂ are at 0.08mm or more preferable.
The normal thickness T ₁ of the film 3 can arbitrarily set in accordance with the glove 1 application etc., 0.1 mm or more when considering that enhance the protection of the user's hand as described above, in particular It is preferably 0.15 mm or more.

Even within the normal thickness T ₁ is the range, according to the present invention, since the region in which a telescopic structure 9 of the film 3 is large extendable with less stress than other regions, the glove 1 user Can relieve the tensile stress that occurs when trying to bend a finger. Therefore, the ease of bending and extending the finger can be greatly improved. Further, it is possible to make it difficult to slip the glove 1 from the hand during use.
Note there is no need entire glove 1 is within the range of the normal thickness T _1, for example to increase the fingertip protection may be thicker than other portions only the tip of the finger portion 6.

The glove 1 of FIG. 1 can be manufactured by an arbitrary manufacturing method. However, according to the manufacturing method of the present invention, the glove 1 can be produced at high production without passing through a special process for forming the stretchable structure 9. It can be manufactured efficiently with its characteristics.
FIG. 3 is a perspective view showing a body portion 14 corresponding to the glove body 2 of the glove 1 among the hand molds 13 used when the glove 1 of the example of FIG. 1 is manufactured by the manufacturing method of the present invention. FIG. 4 is a side view of the finger portion 15 in the hand mold 13 of the example of FIG. 3 and a side view in which a part thereof is enlarged.

With reference to both drawings, the hand mold 13 of this example is formed integrally with a metal part, ceramics, etc., including the main body part 14 and the finger part 15. Although not shown, the main body portion 14 includes a sleeve portion corresponding to the sleeve portion of the glove 1.
The main body part 14 corresponds to the shape of the glove 1 and is connected to the sleeve part 16 via the wrist part 16 corresponding to the wrist part 4 of the glove 1, the palm part 17 corresponding to the palm part 5, and the palm part 17 and a plurality of finger parts 15 connected to 17.

The surface of the back side of each finger part 15 has a groove 8 along the direction intersecting with the length direction of the finger part 15 over the entire length from the region 18 corresponding to the joint at the base of the finger to the fingertip. By arranging a plurality of protruding ridges 19 in the length direction, a three-dimensional shape portion 20 that is the basis of the stretchable structure 9 is configured.
In addition, the individual ridges 19 are disposed so as to be inclined outwardly from the surface 21 on the back side of the finger portion 15 so as to intersect each other at the approximate center in the width direction of the ridges 19. A pair of inclined surfaces 22 corresponding to the pair of inclined surfaces 12 constituting the groove 8 is provided.

The intersecting angle and the protruding amount of the inclined surface 22, the formation pitch, the width, and the like of the ridges 19 are set according to the dimensional shape and the like of the concave groove 8 described above.
According to the manufacturing method of the present invention, the step of attaching the liquid to the surface of the hand mold 13 by immersing it in a liquid containing rubber or resin and then pulling it up,
Solidifying the adhered liquid to form the rubber or resin film 3;
The glove 1 shown in FIG. 1 can be manufactured through the process of peeling the film 3 from the hand mold 13.

For example, when manufacturing the glove 1 made of rubber, first, the surface of the hand mold 13 is treated with a coagulant such as calcium nitrate.
In addition, various additives such as vulcanizing agents, vulcanization accelerators, vulcanization accelerating aids (activators), anti-aging agents, fillers, and dispersing agents are added to the rubber latex to give an unvulcanized or pre-cured state. Prepare an immersion liquid.

Next, the hand mold 13 is immersed in the immersion liquid for a certain period of time, and then pulled up to attach the immersion liquid to the surface of the hand mold 13.
The heated hand mold 13 is heated to dry the immersion liquid and the rubber is vulcanized, or after drying, the hand mold 13 is heated to vulcanize the rubber, and the formed rubber film 3 is removed while being turned over so that the surface of the side 3 that is in close contact with the hand mold 13 is on the outside.

Then, the glove 1 shown in FIG. 1 in which the portion corresponding to the ridge 19 of the hand mold 13 is formed as the concave groove 8 is manufactured.
As the rubber, natural rubber and various rubbers that can be made into latex from synthetic rubber can be used. Examples of such rubber include natural rubber, deproteinized natural rubber, NBR, and styrene-butadiene rubber ( 1 type, or 2 or more types, such as SBR) and chloroprene rubber (CR).

Examples of the vulcanizing agent include sulfur and organic sulfur-containing compounds. The addition amount of the vulcanizing agent is preferably about 0.5 parts by mass or more and 3 parts by mass or less per 100 parts by mass of the solid content (rubber content) in the rubber latex.
Examples of the vulcanization accelerator include PX (zinc N-ethyl-N-phenyldithiocarbamate), PZ (zinc dimethyldithiocarbamate), EZ (zinc diethyldithiocarbamate), BZ (zinc dibutyldithiocarbamate), MZ (2- 1 type or 2 types or more, such as a zinc salt of mercaptobenzothiazole) and TT (tetramethyl thiuram disulfide).

The addition amount of the vulcanization accelerator is preferably about 0.5 parts by mass or more and 3 parts by mass or less per 100 parts by mass of rubber in the rubber latex.
Examples of the vulcanization acceleration aid include one or two kinds such as zinc white (zinc oxide) and stearic acid. The addition amount of the vulcanization acceleration aid is preferably about 0.5 parts by mass or more and 3 parts by mass or less per 100 parts by mass of rubber in the rubber latex.

In general, non-fouling phenols are preferably used as the antioxidant, but amines may also be used. The addition amount of the anti-aging agent is preferably about 0.5 parts by mass or more and 3 parts by mass or less per 100 parts by mass of rubber in the rubber latex.
Examples of the filler include one or more of kaolin clay, hard clay, calcium carbonate, and the like. The addition amount of the filler is preferably about 10 parts by mass or less per 100 parts by mass of rubber in the rubber latex.

The dispersant is added in order to satisfactorily disperse the various additives in the rubber latex, and examples of the dispersant include one or more of anionic surfactants. . The amount of the dispersant added is preferably about 0.3 parts by mass or more and 1 part by mass or less of the total amount of components to be dispersed.
On the other hand, when manufacturing the glove 1 made of resin, first, the surface of the hand mold 13 is treated with a coagulant such as calcium nitrate.

Also, an immersion liquid is prepared by adding various additives such as anti-aging agents, fillers, and dispersants to the resin emulsion.
Next, the hand mold 13 is immersed in the immersion liquid for a certain period of time, and then pulled up to attach the immersion liquid to the surface of the hand mold 13.
After drying, the hand mold 13 is heated as necessary to solidify the resin, or the pulled hand mold 13 is heated to dry the immersion liquid and solidify the resin, and then the formed resin. The film 3 is removed while being turned over so that the surface of the film 3 that is in close contact with the hand mold 13 faces outward.

Then, the glove 1 shown in FIG. 1 in which the portion corresponding to the ridge 19 of the hand mold 13 is formed as the concave groove 8 is manufactured.
Examples of the resin include one or more resins that can be emulsified, such as a vinyl chloride resin, a urethane resin, and an acrylic resin.
As an anti-aging agent, 1 type, or 2 or more types, such as non-fouling phenols and amines which were illustrated previously, are mentioned. The addition amount of the anti-aging agent is preferably about 0.5 parts by mass or more and 3 parts by mass or less per 100 parts by mass of the solid content (resin content) in the resin emulsion.

Examples of the filler include one or more of the exemplified fillers. The amount of the filler added is preferably about 10 parts by mass or less per 100 parts by mass of the resin content in the resin emulsion.
As a dispersing agent, 1 type, or 2 or more types, such as the anionic surfactant of the said illustration, are mentioned. The amount of the dispersant added is preferably about 0.3 parts by mass or more and 1 part by mass or less of the total amount of components to be dispersed.

FIG. 5 is a perspective view showing a glove body which is a main part of another example of the embodiment of the glove of the present invention.
Referring to FIG. 5, the stretchable structure 9 including a plurality of concave grooves 8 is not only a range from the region 7 to the fingertip corresponding to the joint at the base of the finger, but also the region on the back side of the glove 1. You may form continuously from the said fingertip so that the whole region of the back side of the palm part 5 from the area | region 7 to the wrist part 4 side may also be covered.

  In order to manufacture the glove 1 of FIG. 5, instead of the hand mold 13 shown in FIGS. 3 and 4, a hand mold in which a ridge 19 is formed on the palm part 17 corresponding to the palm part 5 is used. Then, the manufacturing method of the present invention may be carried out.

<Example 1>
(Hand type)
The whole is made of earthenware, and as shown in FIG. 3 and FIG. 4, on the back side surface of each finger part 15, the finger part 15 extends over the entire length from the region 18 corresponding to the joint at the base of the finger to the fingertip. A hand mold 13 was prepared in which a plurality of ridges 19 along the length direction and the intersecting direction were arranged in the length direction to form the three-dimensional shape portion 20.

As for the crossing angle of the two inclined surfaces 22 forming the ridges 19, the protrusion amount, the formation pitch of the ridges 19, and the width, the formation pitch P ₁ between the adjacent grooves 8 in the glove 1 to be manufactured is 2. The angle formed by the pair of inclined surfaces 12 constituting the concave groove 8 was set to 60 °.
(Preparation of immersion liquid)
In NBR latex [LX552 manufactured by Nippon Zeon Co., Ltd., rubber concentration 45%], 0.3 parts by mass of stabilizer (ammonia casein), 0.1% potassium hydroxide per 100 parts by mass of rubber in the NBR latex. 5 parts by mass, 1 part by mass of colloidal sulfur (vulcanizing agent), 1 part by mass of vulcanization accelerator BZ [zinc dibutyldithiocarbamate, NOCELLER (registered trademark) BZ manufactured by Ouchi Shinsei Chemical Co., Ltd.], and titanium oxide 3 parts by mass was added to prepare an immersion liquid.

(Manufacture of gloves)
The hand mold 13 prepared previously is immersed in a 45% calcium nitrate aqueous solution, pulled up, placed in an oven heated to 60 ° C. and dried for 1 minute, whereby the surface of the hand mold 13 is calcium nitrate as a coagulant. Processed by.
Next, the hand mold 13 is immersed in the previous immersion liquid maintained at a liquid temperature of 25 ° C. at a constant speed, held for 30 seconds, and then pulled up at a constant speed, so that the immersion liquid is attached to the surface of the mold. It was.

Then, the pulled mold was placed in an oven heated to 110 ° C. and heated for 60 minutes to dry the immersion liquid and solidify the resin. Then, the resin film 3 formed was in close contact with the hand mold 13. The mold 1 was removed while turning over so that the side surface was on the outside, and a single-layered glove 1 consisting only of an NBR film having the three-dimensional shape shown in FIGS. 1 and 2 was produced.
The size of each part, the formation pitch P ₁ between the grooves 8 adjacent to the previously explained 2.5 mm, the angle of the pair of inclined surfaces 12 constituting the groove 8 was 60 °.

Also it was determined the thickness of the film 3 in each part of the glove 1 in cross-section observation by a microscope, volar thickness _{T 12} of the palm side of the thickness _{T 11} of the finger portion 6 is 0.36 mm, the palm portion 5 0.35mm , the thickness _{T 13} of the back side was 0.34 mm. When the average value (T ₁₁ + T ₁₂ + T ₁₃ ) / 3 of the three points was determined as the normal thickness T ₁ , it was 0.35 mm.
The minimum thickness T ₂ in the deepest portion of the concave groove 8 was 0.10 mm, and the difference between both thicknesses T ₁ -T ₂ = 0.25 mm.

<Example 2>
As the hand mold 13, the crossing angle, the protrusion amount, the formation pitch of the ridges 19, and the width of the two inclined surfaces 22 having the three-dimensional shape shown in FIGS. 3 and 4 and forming the ridges 19 are manufactured. In the glove 1, except that the formation pitch P ₁ between adjacent concave grooves 8 is 5.1 mm and the angle formed by the pair of inclined surfaces 12 constituting the concave grooves 8 is 60 °. In the same manner as in Example 1, a single-layered glove 1 made only of an NBR film was manufactured.

As for the dimensions of each part, as described above, the formation pitch P ₁ between the adjacent grooves 8 was 5.1 mm, and the angle formed by the pair of inclined surfaces 12 constituting the grooves 8 was 60 °.
Also it was determined the thickness of the film 3 in each part of the glove 1 in cross-section observation by a microscope, volar thickness _{T 12} of the palm side of the thickness _{T 11} of the finger portion 6 is 0.36 mm, the palm portion 5 0.35mm , the thickness _{T 13} of the back side was 0.35 mm. When the average value (T ₁₁ + T ₁₂ + T ₁₃ ) / 3 of the three points was determined as the normal thickness T ₁ , it was 0.35 mm.

The minimum thickness T ₂ in the deepest portion of the concave groove 8 was 0.09 mm, and the difference between both thicknesses T ₁ −T ₂ = 0.26 mm.
<Example 3>
As the hand mold 13, the crossing angle, the protrusion amount, the formation pitch of the ridges 19, and the width of the two inclined surfaces 22 having the three-dimensional shape shown in FIGS. 3 and 4 and forming the ridges 19 are manufactured. In the glove 1, except that the formation pitch P ₁ between adjacent concave grooves 8 is 2.5 mm and the angle between the pair of inclined surfaces 12 constituting the concave grooves 8 is set to 100 °. In the same manner as in Example 1, a single-layered glove 1 made only of an NBR film was manufactured.

The size of each part, the angle of the pair of inclined surfaces 12 forming the pitch P ₁ between the grooves 8 adjacent to the above constitutes 2.5 mm, the groove 8 was 100 °.
Also it was determined the thickness of the film 3 in each part of the glove 1 in cross-section observation by a microscope, volar thickness _{T 12} of the palm side of the thickness _{T 11} of the finger portion 6 is 0.36 mm, the palm portion 5 0.35mm , the thickness _{T 13} of the back side was 0.34 mm. When the average value (T ₁₁ + T ₁₂ + T ₁₃ ) / 3 of the three points was determined as the normal thickness T ₁ , it was 0.35 mm.

The minimum thickness T ₂ in the deepest portion of the concave groove 8 was 0.27 mm, and the difference between both thicknesses T ₁ −T ₂ = 0.08 mm.
<Example 4>
As the hand mold 13, the crossing angle, the protrusion amount, the formation pitch of the ridges 19, and the width of the two inclined surfaces 22 having the three-dimensional shape shown in FIGS. 3 and 4 and forming the ridges 19 are manufactured. In the glove 1, except that the formation pitch P ₁ between adjacent concave grooves 8 is 2.5 mm and the angle formed by the pair of inclined surfaces 12 constituting the concave grooves 8 is 120 °. In the same manner as in Example 1, a single-layered glove 1 made only of an NBR film was manufactured.

The size of each part, the formation pitch P ₁ between the grooves 8 adjacent to the above is 2.5 mm, the angle of the pair of inclined surfaces 12 constituting the groove 8 was 120 °.
Also was determined the thickness of the film 3 in each part of the glove 1 in cross-section observation by a microscope, the palm side of the thickness _{T 11} of the finger portion 6 is 0.36 mm, the palm side thickness _{T 12} of the palm portion 5 0.34mm , the thickness _{T 13} of the back side was 0.34 mm. When the average value (T ₁₁ + T ₁₂ + T ₁₃ ) / 3 of the three points was determined as the normal thickness T ₁ , it was 0.35 mm.

The minimum thickness T ₂ in the deepest portion of the concave groove 8 was 0.33 mm, and the difference between both thicknesses T ₁ -T ₂ = 0.02 mm.
<Comparative example 1>
A glove having a single-layer structure made of only an NBR film was produced in the same manner as in Example 1 except that a hand for a normal glove having no ridges 19 was used.

Was determined the thickness of the film 3 in each part of the glove 1 in cross-section observation by a microscope, the palm side of the thickness _{T 11} of the finger portion 6 is 0.35 mm, the palm side thickness _{T 12} of the palm portion 5 0.35 mm, the thickness _{T 13} of the back side was 0.33mm.
<Comparative example 2>
A single-layered glove consisting only of an NBR film was produced in the same manner as in Comparative Example 1 except that the immersion time in hand-shaped latex was 10 seconds.

Was determined the thickness of the film 3 in each part of the glove 1 in cross-section observation by a microscope, the palm side of the thickness _{T 11} of the finger portion 6 is 0.12 mm, the palm side thickness _{T 12} of the palm portion 5 0.11 mm, the thickness _{T 13} of the back side was 0.10mm.
<Evaluation test>
(Evaluation of ease of bending and stretching fingers)
With the myoelectric measurement electrode (manufactured by Nihon Kohden Co., Ltd.) attached to the heel side carpal flexor of the subject's forearm, the subject wears the gloves manufactured in the examples and comparative examples, and 1 per second. The finger was bent and stretched in a cycle, and the maximum myoelectric value (mV) generated was measured. It was determined that the smaller the maximum myoelectric value was, the easier the fingers were to bend and stretch.

(Fatigue difficulty evaluation)
The subject after evaluating the ease of bending and stretching the finger was asked to determine the fatigue feeling of the arm based on the following criteria, and the evaluation of the difficulty of fatigue was made.
○: I did not feel almost tired.
Δ: Somewhat tired.

X: I felt quite tired.
(Evaluation of slippage difficulty)
The fingertips on the thumb, index finger, middle finger, ring finger, and little finger were obtained after the subject was put on the gloves manufactured in Examples and Comparative Examples, and the finger was bent and stretched 50 times in a cycle of once every 2 seconds. The amount of increase in the gap between the finger and the finger part of the glove was measured as a deviation (mm). It was determined that the smaller the deviation amount, the harder the deviation.

(Abrasion resistance evaluation)
A test piece of 2 cm × 1 cm was taken from the palm side of the palm part of the glove manufactured in the example and the comparative example, and a speed of 8 m / min was applied in a state where a load of 100 g was applied to the surface of the sandpaper (# 100). The reciprocating motion was performed at s. Then, the test piece was checked every 3 reciprocations, and the number of reciprocations in which penetration breakage occurred was recorded. Further, it was determined that the number of reciprocations was 40 times or more as good wear resistance (◯) and less than 40 times as bad (x).

  The results are shown in Table 1.

From the results of Comparative Examples 1 and 2 in Table 1, it is easy to bend and stretch the finger if the entire thickness is reduced and it is difficult to cause fatigue, but the finger protection is insufficient and the finger is sufficiently protected. It has been found that when the entire thickness is increased, it is difficult to bend and stretch the finger, and it is easy to get tired, and in any case, the glove is easily displaced when the finger is bent and stretched.
On the other hand, from the results of Examples 1 to 4, by providing a stretchable structure on the back side of the finger part, it is easy to bend and extend the finger while increasing the overall thickness in order to sufficiently protect the finger. It was found that it was difficult to get tired and that it was difficult to slip the gloves when the fingers were bent and stretched.

  In addition, when each example is compared, it is preferable that the formation pitch between the adjacent concave grooves constituting the stretchable structure is 5.5 mm or less, and the angle formed by the pair of inclined surfaces constituting the concave groove is 90. It has been found that it is preferable that the temperature is not more than °.

DESCRIPTION OF SYMBOLS 1 Glove 2 Glove main body 3 Membrane 4 Wrist part 5 Palm part 6 Finger part 7 Area 8 Concave groove 9 Elastic structure 10 Front surface 11 Back surface 12 Inclined surface 13 Hand mold 14 Main body part 15 Finger part 16 Wrist part 17 Palm part 18 Area 19 Convex Article 20 Three-dimensional shape part 21 Surface 22 Inclined surface

Claims (7)

  The entire glove body including a plurality of finger parts is a glove integrally formed of a rubber or resin film, and the finger parts are at least on the back side of the finger parts in the back side region of the gloves. A glove characterized by being provided with a stretchable structure that can be stretched in the length direction.   The glove according to claim 1, wherein the stretchable structure is formed over the entire length from a region corresponding to a joint at the base of the finger to the fingertip.   The stretchable structure is configured by arranging a plurality of concave grooves along the length direction of the finger portion in the length direction on the back surface of the finger portion. Gloves as described in   The glove according to claim 3, wherein a formation pitch between adjacent concave grooves is 5.5 mm or less.   The concave groove has a substantially V-shaped cross section by a pair of inclined surfaces arranged to be inclined from the surface on the back side of the finger portion toward the rear surface so as to intersect each other at substantially the center in the width direction of the concave groove. The glove according to claim 3 or 4, wherein the angle formed by the two inclined surfaces is 5 ° or more and 90 ° or less.   The glove according to any one of claims 3 to 5, wherein a thickness of the rubber or resin film is set to be 0.2 mm or less smaller than other portions in the deepest portion of the concave groove. A manufacturing method for manufacturing the glove according to any one of claims 1 to 6,
A hand mold having a three-dimensional shape corresponding to the overall shape of the glove and having a three-dimensional shape portion that is the basis of the telescopic structure on at least the back side of the finger portion in the back side region of the glove is prepared. A step of attaching the liquid to the surface of the hand mold by immersing the hand mold in a liquid containing rubber or resin and then pulling it up;
Solidifying the adhered liquid to form the rubber or resin film;
And a step of peeling the film from the hand mold to obtain a glove.

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