JP2013100629A - Glove - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide gloves more excellent in effect to reduce stuffy feeling than existing ones.SOLUTION: The gloves include porous film formed from rubber or resin and having a bubble content of ≥20 and ≤60 vol.%, an average bubble diameter of ≤150 μm, and a bubble communication rate of ≥30 and ≤80%.

Description

  The present invention relates to a glove including a porous membrane of rubber or resin.

Sebum on the skin of hands to protect human skin, prevent food poisoning, infectious diseases, etc., or handle objects (semiconductors, precision equipment, etc.) in various situations such as general households, factories, medical sites, and sports Various types of gloves are widely used for protection from the like.
In particular, gloves that are integrally formed of a rubber or resin film are widely used because they are thin and suitable for work with fine fingertips.

The glove is generally manufactured by a so-called dipping method.
For example, when manufacturing a glove that is integrally formed of a rubber film as a whole, first, various additives such as a vulcanizing agent are blended with rubber latex to prepare an unvulcanized or pre-cured immersion liquid. . Also, for example, a ceramic mold corresponding to the three-dimensional shape of the glove is prepared, and the surface thereof is treated with a coagulant (mainly calcium nitrate aqueous solution).

Next, the mold is dipped in the immersion liquid for a predetermined time and then pulled up to attach the immersion liquid to the surface of the mold.
Then, the entire mold is heated to dry the immersion liquid and vulcanize the rubber, or once dried and heated together with the mold to vulcanize the rubber, and then demolded to form a rubber film as a whole. The glove formed integrally is manufactured.

In addition, the glove formed integrally with the resin film is replaced with the immersion liquid containing the rubber latex, except that an immersion liquid prepared by blending various additives into the resin emulsion is used. It can be manufactured in the same manner.
However, since the continuous film of rubber or resin does not have moisture permeability or hygroscopicity, if the glove is worn for a long time, the hand may become stuffy or sticky due to sweat, so-called stuffiness may occur. There is.

The glove has a laminated structure of two or more layers mainly including a porous film having a continuous pore structure, particularly a laminated structure in which the innermost layer contacting the hand is the porous film, and moisture generated from the hand is There is a method of reducing the feeling of stuffiness by absorbing it with a membrane or releasing it to the outside by the air permeability of the porous membrane.
In the dipping method, the rubber or resin film formed can be mainly formed into a porous film having a continuous pore structure by bubbling the dipping solution.

  For example, in Patent Document 1, the porous membrane is laminated with a fiber glove to impart air permeability to the glove.

JP 2011-1662 A

However, according to the inventor's study, the conventional porous membrane is not sufficiently hygroscopic or air permeable because the total amount of bubbles contained in the inside (the total volume of bubbles) is generally small.
For example, a porous membrane laminated with a fibrous glove like the porous membrane described in Patent Document 1 and the like is naturally limited in the size and number of holes from the viewpoint of preventing the entry of water and the like from the outside. , Its breathability is not enough.

For this reason, none of the conventional gloves provided with the porous film can sufficiently satisfy the reduction of stuffiness expected by the user.
The objective of this invention is providing the glove excellent in the reduction effect of a damp feeling than before.

In order to solve the above-mentioned problems, the inventor diligently studied the relationship between the structure of the porous membrane, the hygroscopicity of the gloves equipped with the porous membrane, and the feeling of stuffiness.
As a result, the bubble content of the porous membrane as an index of the total bubble volume is 20 volume% to 60 volume%, the average bubble diameter indicating the size of each bubble is 150 μm or less, and the ratio of the continuous pore structure By defining the communication rate of bubbles indicating 30% or more and 80% or less, the porous membrane has a continuous pore structure, and the total volume of the bubbles is large and has excellent hygroscopicity. It was found that the feeling of stuffiness can be greatly reduced, and the present invention has been completed.

That is, the present invention is a glove including a porous membrane of rubber or resin, and the porous membrane has a bubble content of 20% by volume to 60% by volume, an average bubble diameter of 150 μm or less, and The communication rate is 30% or more and 80% or less.
In the present invention, the bubble content indicating the ratio of the total volume of bubbles contained per unit volume of the porous membrane is limited to the above range for the following reason.

That is, when the bubble content is less than 20% by volume, the total volume of bubbles in the porous membrane is insufficient, the hygroscopicity becomes insufficient, and the effect of reducing the feeling of stuffiness of the glove cannot be obtained.
On the other hand, when the bubble content exceeds 60% by volume, the strength of the porous membrane, and hence the glove, is lowered, and it is easily broken during use.
On the other hand, if the bubble content of the porous film is in the range of 20% by volume or more and 60% by volume or less, the total volume of the bubbles in the porous film is adjusted while giving appropriate strength to the porous film and the glove. It is possible to make it as large as possible, improve the hygroscopicity as much as possible, and greatly reduce the feeling of stuffiness of gloves.

In consideration of further improving this effect and further reducing the feeling of stuffiness, the bubble content is preferably 35% by volume or more even within the above range.
Moreover, it is based on the following reason that an average bubble diameter is limited to the said range.

That is, when the average bubble diameter exceeds 150 μm, even if the amount of bubbles is the same, the surface area inside each bubble becomes small, so that the hygroscopic property is lowered and moisture cannot be efficiently absorbed.
On the other hand, if the average bubble diameter of the porous membrane is in the range of 150 μm or less, the surface area inside the bubbles can be increased, so that the hygroscopicity of the porous membrane can be improved and moisture can be absorbed more efficiently. In this way, the feeling of stuffiness of gloves can be greatly reduced.

In consideration of further improving this effect and further reducing the feeling of stuffiness of gloves, the average bubble diameter is preferably 70 μm or less even within the above range.
Furthermore, the reason why the communication rate of bubbles indicating the ratio of the continuous pore structure is limited to the above range is as follows.
That is, when the bubble communication rate is less than 30%, the proportion of the independent pore structure that does not contribute to moisture absorption increases, so that the hygroscopicity of the porous membrane becomes insufficient, and the effect of reducing the feeling of stuffiness of the gloves cannot be obtained.

  On the other hand, if the bubble communication rate of the porous membrane is in the range of 30% or more, the moisture absorption property of the porous membrane is improved, moisture can be absorbed more efficiently, and the greasy feeling of the glove is improved. It can be greatly reduced.

However, if the communication rate is too high, the strength of the porous membrane, and thus the glove, is reduced, and it is easily broken during use. Therefore, the communication rate is limited to 80% or less even within the above range.
In consideration of further improving this effect and further reducing the feeling of stuffiness of the glove, the communication rate is preferably 50% or more even within the above range.

  ADVANTAGE OF THE INVENTION According to this invention, the glove excellent in the reduction effect of a damp feeling than before can be provided.

The present invention is a glove comprising a porous membrane of rubber or resin, wherein the porous membrane has a bubble content of 20% by volume or more and 60% by volume or less, an average bubble diameter of 150 μm or less, and communication of bubbles. The rate is 30% or more and 80% or less.
The reason why the bubble content of the porous film is limited to the above range is as follows.
That is, when the bubble content is less than 20% by volume, the total volume of bubbles in the porous membrane is insufficient, the hygroscopicity becomes insufficient, and the effect of reducing the feeling of stuffiness of the glove cannot be obtained.

On the other hand, when the bubble content exceeds 60% by volume, the strength of the porous membrane, and hence the glove, is lowered, and it is easily broken during use.
On the other hand, if the bubble content of the porous film is in the range of 20% by volume or more and 60% by volume or less, the total volume of the bubbles in the porous film is adjusted while giving appropriate strength to the porous film and the glove. It is possible to make it as large as possible, improve the hygroscopicity as much as possible, and greatly reduce the feeling of stuffiness of gloves.

In consideration of further improving this effect and further reducing the feeling of stuffiness, the bubble content is preferably 35% by volume or more even within the above range.
Moreover, it is based on the following reason that an average bubble diameter is limited to the said range.

That is, when the average bubble diameter exceeds 150 μm, even if the amount of bubbles is the same, the surface area inside each bubble becomes small, so that the hygroscopic property is lowered and moisture cannot be efficiently absorbed.
On the other hand, if the average bubble diameter of the porous membrane is in the range of 150 μm or less, the surface area inside the bubbles can be increased, so that the hygroscopicity of the porous membrane can be improved and moisture can be absorbed more efficiently. In this way, the feeling of stuffiness of gloves can be greatly reduced.

In consideration of further improving this effect and further reducing the feeling of stuffiness of gloves, the average bubble diameter is preferably 70 μm or less even within the above range.
Further, considering that the total bubble volume of the porous film is sufficiently increased to ensure good hygroscopicity, the average bubble diameter is preferably 10 μm or more, particularly 50 μm or more even within the above range.

Furthermore, the reason why the communication rate of bubbles indicating the ratio of the continuous pore structure is limited to the above range is as follows.
That is, when the bubble communication rate is less than 30%, the proportion of the independent pore structure that does not contribute to moisture absorption increases, so that the hygroscopicity of the porous membrane becomes insufficient, and the effect of reducing the feeling of stuffiness of the gloves cannot be obtained.
On the other hand, if the bubble communication rate of the porous membrane is in the range of 30% or more, the moisture absorption property of the porous membrane is improved, moisture can be absorbed more efficiently, and the greasy feeling of the glove is improved. It can be greatly reduced.

However, if the communication rate is too high, the strength of the porous membrane, and thus the glove, is reduced, and it is easily broken during use. Therefore, the communication rate is limited to 80% or less even within the above range.
In consideration of further improving this effect and further reducing the feeling of stuffiness of the glove, the communication rate is preferably 50% or more even within the above range.

In the present invention, the bubble content rate, the average bubble diameter, and the bubble communication rate are represented by values measured by the following methods, respectively. All measurements shall be carried out in an environment of 23 ± 1 ° C.
<Bubble content>
A specimen having a predetermined area is cut out from the glove including the porous membrane, and a micrograph of the cross section is taken using a digital microscope. Then, the thickness of the porous film and the thin film is measured from the photographed micrograph, and the volume of the porous film and the thin film is obtained from the thickness and the area of the test piece.

The mass of the thin film is determined from the volume of the thin film and the true specific gravity of the material forming the thin film.
Next, the mass of the test piece is measured using an electronic balance, and the mass of the porous membrane is obtained by subtracting the mass of the thin film previously obtained from the mass.
Then, the apparent specific gravity of the porous membrane is calculated from the volume and the mass, and the apparent specific gravity and the true specific gravity of the material forming the porous membrane are used as an index of the total bubble volume of the porous membrane. The bubble content (volume%) is calculated.

<Average bubble diameter>
A specimen is cut from the glove containing the porous membrane, and a micrograph of the cross section is taken using a digital microscope. Then, 50 bubbles are arbitrarily selected from the photographed micrograph, the diameter of each bubble is measured in the two-point distance measurement mode, and the average value is calculated as the average bubble diameter (μm).

<Bubble communication rate>
A specimen having a predetermined area is cut out from the glove including the porous membrane, and a micrograph of the cross section is taken using a digital microscope. Then, the thickness of the porous membrane is measured from the photographed micrograph, and the volume of the porous membrane is determined from the thickness and the area of the test piece.
Next, after measuring the mass of the test piece, it is immersed in methanol and absorbed in the porous membrane. And after taking out a test piece from methanol and wiping the surface with a paper towel, mass is measured again, and the increase in the mass before and behind immersion is taken as the absorption mass of methanol.

Next, from the absorption mass and the specific gravity of methanol, the volume of methanol absorbed by the porous membrane is determined and defined as the volume of the continuous pore structure. From the volume and the volume of the porous membrane previously measured, The content (volume%) of the continuous pore structure per unit volume of the porous membrane is determined.
Then, the percentage of the content of the continuous pore structure (% by volume) with respect to the previously obtained bubble content, that is, the percentage of all the bubbles per unit volume (% by volume) is obtained, and the rate of bubble communication (%) And

In the same manner as the conventional film, the porous film is formed by immersing an immersion liquid containing a latex of rubber on the surface of the mold to form a glove shape and vulcanizing the rubber by a dipping method. It can be formed by adhering an immersion liquid containing an emulsion to the mold surface to form a film in the shape of a glove and solidifying or curing the resin.
At this time, the porous film is formed by foaming the immersion liquid before adhering to the mold surface by stirring or blowing air or the like in advance.

In order to set the bubble content of the porous film, the average bubble diameter, and the bubble communication rate within the above ranges, for example, the conditions for foaming the immersion liquid, the composition of the immersion liquid, and the mold are immersed in the mold. What is necessary is just to adjust the immersion conditions at the time of making it adhere to the surface, or the conditions of drying, vulcanization, solidification, and hardening after attaching the immersion liquid to the mold surface, individually and individually.
The immersion liquid containing rubber is prepared by blending various additives such as a vulcanizing agent with a latex of rubber as in the prior art.

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, and acrylonitrile-butadiene rubber (NBR). , One or more of styrene-butadiene rubber (SBR), chloroprene rubber (CR) and the like.
Examples of the vulcanizing agent for vulcanizing the rubber include sulfur and organic sulfur-containing compounds. The blending ratio of the vulcanizing agent is preferably 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.

In the immersion liquid containing the rubber and the vulcanizing agent, various additives such as a vulcanization accelerator, a vulcanization acceleration aid, an anti-aging agent, a filler, a dispersant, a stabilizer, and a foaming agent are further blended. Also good.
Among these, examples of the vulcanization accelerator include PX (zinc N-ethyl-N-phenyldithiocarbamate), PZ (zinc dimethyldithiocarbamate), EZ (zinc diethyldithiocarbamate), BZ (zinc dibutyldithiocarbamate), MZ ( 1 type or 2 types or more, such as 2-mercaptobenzothiazole zinc salt) and TT (tetramethyl thiuram disulfide).

The blending ratio of the vulcanization accelerator is preferably 0.5 parts by mass or more and 3 parts by mass or less per 100 parts by mass of the rubber content in the rubber latex.
Examples of the vulcanization acceleration aid include zinc white (zinc oxide) and / or stearic acid. The blending ratio of the vulcanization acceleration aid is preferably 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 blending ratio of the anti-aging agent is preferably 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 blending ratio of the filler is preferably 10 parts by mass or less per 100 parts by mass of rubber in the rubber latex.

The dispersant is blended in order to favorably disperse the various additives in the rubber latex, and examples of the dispersant include one or more of anionic surfactants. . The blending ratio of the dispersant is preferably 0.3 parts by mass or more and 1 part by mass or less of the total amount of components to be dispersed.
The stabilizer is for assisting the foaming when foaming the immersion liquid as described above, and as the stabilizer, for example, a surfactant or the like having various functions for assisting foaming of the immersion liquid. These stabilizers can be used. The stabilizer may be omitted, but when blended, the blending ratio may be appropriately set according to the bubble content, average bubble diameter, and bubble communication rate of the porous film to be formed.

The immersion liquid containing a resin is prepared by blending various additives into a resin emulsion, as in the prior art.
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.
Among these, when forming a porous film with a thermosetting resin such as a urethane resin or a curable acrylic resin, the immersion liquid is attached to the surface of the mold by the dipping method, and then once dried, if necessary. The resin may be cured by heating with the mold, or the resin may be cured at the same time as heating the mold and drying the immersion liquid.

Further, when the porous film is formed from a thermoplastic resin such as a vinyl chloride resin or a thermoplastic acrylic resin, the resin may be solidified by drying the immersion liquid for each mold. Alternatively, the mold may be heated to dry the immersion liquid and then cooled to solidify the resin.
In the immersion liquid containing the resin, various additives such as an anti-aging agent, a filler, a dispersant, a stabilizer, and a foaming agent may be further blended.

Among these, as an anti-aging agent, 1 type, or 2 or more types, such as the non-polluting phenols and amines which were illustrated previously, are mentioned. The blending ratio of the anti-aging agent is preferably 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 blending ratio of the filler is preferably 10 parts by mass or less per 100 parts by mass of the resin component in the resin emulsion.

As a dispersing agent, 1 type (s) or 2 or more types, such as the anionic surfactant of the said illustration, are mentioned. The blending ratio of the dispersant is preferably 0.3 parts by mass or more and 1 part by mass or less of the total amount of components to be dispersed.
As the stabilizer, as described above, various stabilizers having a function of assisting foaming of the immersion liquid, such as a surfactant, can be used. The stabilizer may be omitted, but when blended, the blending ratio may be appropriately set according to the bubble content, average bubble diameter, and bubble communication rate of the porous film to be formed.

When the resin is a thermosetting resin such as a urethane resin, a crosslinking agent, a curing agent, or the like of the resin may be further blended in the immersion liquid at an appropriate ratio.
The glove of the present invention may have a single-layer structure having only the porous membrane, but in order to give the glove appropriate strength, water impermeability, etc., two or more layers with other layers are laminated. It is preferable to form the structure.

  In a glove having a laminated structure, the thickness of the porous membrane allows the glove to have an appropriate strength and good hygroscopicity while being thinned as much as possible so that it can be applied to fine work on a fingertip. Considering this, it is preferably 0.07 mm or more, particularly 0.1 mm or more, and is preferably 2.0 mm or less, more preferably 1.5 mm or less, and particularly preferably 1.0 mm or less.

  The other layers constituting the glove having a laminated structure together with the porous film can be formed by various structures and materials, but considering that the glove is particularly suitable for thin-walled work with fine fingertips, etc. For example, it comprises at least one polymer selected from the group consisting of polyurethane, silicone rubber, cellulose acetate, ethyl cellulose, and polyvinyl alcohol, or a mixture of the polymer and rubber or resin that forms the porous membrane. A thin film is preferred.

In particular, in consideration of imparting good water impermeability and moisture permeability to the thin film, the thin film is formed of polyurethane or a mixture of the polyurethane and a rubber or resin that is the basis of the porous film. Is preferred.
The thin film is water-impermeable and moisture-permeable. By providing the thin film on the outside of the glove and the porous film on the inside of the glove, it is possible to reliably prevent water from entering the glove from the outside. The moisture absorbed by the porous membrane can be effectively released to the outside of the glove, and the greasy feeling of the glove can be further greatly reduced.

The thickness of the thin film is preferably 5 μm or more, particularly preferably 10 μm or more, and is preferably 200 μm or less, more preferably 100 μm or less, particularly preferably 50 μm or less.
If the thickness is less than the above range, a continuous thin film having good water impermeability cannot be formed on one surface of the porous membrane, so that it may not be possible to reliably prevent water from entering from the outside.
On the other hand, when the thickness exceeds the above range, sufficient moisture permeability cannot be imparted to the thin film, so that when the gloves are worn for a long time, the hands may be easily stuffy or sticky due to sweat.

Further, the thin film is preferably a non-porous film in order to ensure good water impermeability.
The thin film is prepared by preparing a coating solution containing the polymer and the like, and the coating solution is applied to the surface of the porous film previously formed by any coating method such as dipping or spraying. It can be formed by applying and then drying.

Further, when the polymer is a crosslinkable polymer such as polyurethane or silicone rubber, a crosslinking agent, a curing agent, etc. of the polymer are blended in an appropriate ratio in the immersion liquid, and simultaneously with the drying. Alternatively, the polymer may be crosslinked by heating after drying.
The thin film can also be formed integrally with the porous film by, for example, an immersion method.
For example, after being treated with a coagulant and before being immersed in latex foam, the mold is immersed in an immersion liquid containing a polymer or the like that forms the thin film for a certain period of time and then pulled up, and then immersed in the surface of the mold. The liquid is attached, and then dipped in the latex foam for a certain time and then pulled up to attach the latex foam.

  Then, the porous film and the thin film are integrated by drying and vulcanizing the rubber or curing the resin, or once drying and heating the mold together to cure the rubber or curing the resin. Can be formed. The order of immersion may be reversed.

<Example 1>
(Preparation of immersion liquid for porous membrane)
In NBR latex [NIPOL (registered trademark) LX550 manufactured by Nippon Zeon Co., Ltd.], 1 part by mass of sulfur as a vulcanizing agent and vulcanization accelerator BZ per 100 parts by mass of rubber (dry base) in the NBR latex After blending 1 part by mass (zinc dibutyldithiocarbamate) and 2 parts by mass of zinc white as a vulcanization acceleration aid, the mixture was prevulcanized at 30 ° C. for 48 hours with stirring.

Subsequently, it was made to foam by stirring at high speed using a stirrer, and the immersion liquid for porous membranes was prepared.
(Formation of porous film)
As the mold, we prepared ceramics that correspond to the shape of the gloves.
The mold was first immersed in a 25% calcium nitrate aqueous solution, pulled up, and dried to treat the surface of the mold with calcium nitrate as a coagulant.

Next, the mold is immersed in a previous porous membrane immersion liquid whose liquid temperature is maintained at 25 ° C. at a constant speed, held for 30 seconds, and then pulled up at a constant speed, so that the immersion liquid is placed on the surface of the mold. Was attached.
Then, the raised mold is placed in an oven heated to 100 ° C. and heated for 30 minutes to dry the immersion liquid and vulcanize the rubber to form a single-layer structure composed of NBR, which constitutes the entire glove. A 4 mm porous membrane was formed.

(Preparation of coating solution for thin film)
A polyurethane-based aqueous coating agent [Hydran (registered trademark) WLS-208 manufactured by DIC Corporation] is added to 4 parts by mass of a crosslinking agent [Hydran Assista manufactured by DIC Corporation] per 100 parts by mass of polyurethane in the aqueous coating agent. CS-7] was blended to prepare a coating solution for a thin film.
(Manufacture of gloves)
The thin film is formed by applying the coating liquid for the thin film on the surface of the porous film previously formed on the surface of the mold so that the thickness after drying is 0.2 mm and drying and cross-linking polyurethane. Thereafter, the mold was removed to produce a glove having a two-layer structure of the porous film and the thin film.

(Porous membrane structure)
When the bubble content, average bubble diameter, and bubble communication rate of the porous membrane were measured by the methods described above, the bubble content was 41% by volume, the average bubble size was 60 μm, and the bubble communication was The rate was 65%.
<Examples 2-5, Comparative Examples 1-5>
Except for adjusting the foaming method of the immersion liquid, mold immersion conditions, drying, vulcanization conditions, and the like, it was made of NBR in the same manner as in Example 1, and the bubble content, average bubble diameter shown in Table 1 described later, In addition, a glove having a two-layer structure of a single-layer porous film having a bubble communication rate and a polyurethane thin film was manufactured.

<Sensory test>
Gloves manufactured in Examples 1 to 5 and Comparative Examples 1 to 5 were worn by 10 test subjects, and the wearing feeling after 10 minutes of wearing was evaluated in the following five stages. Since Comparative Examples 4 and 5 were worn and worn during use, the sensory test was stopped.
A: No stuffiness was felt. Very comfortable.

B: Little stuffiness was felt. comfortable.
C: Practical level although slight stuffiness was felt.
D: Steaming was felt. Uncomfortable.
E: Steaming was felt strongly. Very uncomfortable.
The results are shown in Table 1.

From the results of Comparative Example 1 in Table 1, when the bubble communication rate of the porous membrane is less than 30%, the proportion of the independent pore structure that does not contribute to moisture absorption increases, so the hygroscopicity of the porous membrane becomes insufficient, It was found that the effect of reducing the stuffiness could not be obtained.
Further, from the result of Comparative Example 2, when the average bubble diameter of the porous membrane exceeds 150 μm, the surface area inside each bubble is reduced even with the same amount of bubbles, so that the hygroscopicity is lowered, and the feeling of stuffiness of the glove is also produced. It turns out that the effect to reduce cannot be acquired.

Moreover, from the result of Comparative Example 3, when the bubble content of the porous film is less than 20% by volume, the total volume of the bubbles is insufficient, the hygroscopicity is insufficient, and the effect of reducing the feeling of stuffy gloves cannot be obtained. understood.
Further, from the results of Comparative Example 4, it was found that when the bubble content of the porous membrane exceeds 60% by volume, the strength of the porous membrane, and hence the glove, is lowered and easily broken during use. .
Furthermore, from the result of Comparative Example 5, it is found that when the bubble communication rate of the porous membrane exceeds 80%, the strength of the porous membrane, and hence the glove, is lowered, and it is easily broken during use. It was.

On the other hand, from the results of Examples 1 to 5, by setting the bubble content, the average bubble diameter, and the bubble communication rate of the porous membrane within the specified ranges, the porous membrane is mainly continuous pores. It has been found that the feeling of stuffiness of gloves can be greatly reduced because it has a structure and has a large total volume of bubbles and excellent hygroscopicity.
Further, from the results of Examples 1 to 5, considering that the feeling of stuffiness of gloves is further reduced, the bubble content of the porous membrane is 35% by volume or more, the average bubble diameter is 70 μm or less, and the bubble communication rate is 50%. % Was found to be preferable.

In order to solve the above-mentioned problems, the inventor diligently studied the relationship between the structure of the porous membrane, the hygroscopicity of the gloves equipped with the porous membrane, and the feeling of stuffiness.
As a result, the bubble content of the porous membrane as an index of the total bubble volume is 20% by volume or more and 60% by volume or less, the average bubble size indicating the size of each bubble is 10 μm or more, 150 μm or less, and continuous pores By defining the communication rate of bubbles indicating the ratio of the structure to 30% or more and 80% or less, the porous membrane has mainly a continuous pore structure, and has a large bubble total volume and excellent hygroscopicity. As a result, it was found that the feeling of stuffiness of gloves can be greatly reduced, and the present invention has been completed.

That is, the present invention is a glove comprising a rubber or resin porous membrane, wherein the porous membrane has a bubble content of 20% by volume or more and 60% by volume or less, an average cell diameter of 10 μm or more and 150 μm or less, In addition, the communication rate of bubbles is 30% or more and 80% or less.
In the present invention, the bubble content indicating the ratio of the total volume of bubbles contained per unit volume of the porous membrane is limited to the above range for the following reason.

That is, if the average bubble diameter is less than 10 μm, the effect of ensuring a sufficient hygroscopicity by sufficiently increasing the total bubble volume of the porous membrane cannot be obtained . Since the surface area is small, the hygroscopicity is lowered, and there is a problem that moisture cannot be absorbed efficiently.
In contrast, if the average bubble diameter of the porous membrane is in the range of 10 μm or more and 150 μm or less, the total volume of the bubbles in the porous membrane is sufficiently increased to ensure good hygroscopicity, and the surface area inside the bubbles is reduced. Since it can be increased, the moisture absorption of the porous membrane can be improved, moisture can be absorbed more efficiently, and the feeling of stuffiness of gloves can be greatly reduced.

In consideration of further improving this effect and further reducing the stuffiness of the glove, the average bubble diameter is preferably 50 μm or more, and preferably 70 μm or less, even within the above range.
Furthermore, the reason why the communication rate of bubbles indicating the ratio of the continuous pore structure is limited to the above range is as follows.
That is, when the bubble communication rate is less than 30%, the proportion of the independent pore structure that does not contribute to moisture absorption increases, so that the hygroscopicity of the porous membrane becomes insufficient, and the effect of reducing the feeling of stuffiness of the gloves cannot be obtained.

However, if the communication rate is too high, the strength of the porous membrane, and thus the glove, is reduced, and it is easily broken during use. Therefore, the communication rate is limited to 80% or less even within the above range.
In consideration of further improving this effect and further reducing the feeling of stuffiness of the glove, the communication rate is preferably 50% or more even within the above range.
Moreover, it is preferable that a water-impermeable and moisture-permeable thin film is laminated on the outside of the porous film.
Thereby, moderate intensity | strength, water impermeability, favorable hygroscopicity, etc. can be provided to a glove.

The present invention is a glove comprising a rubber or resin porous membrane, wherein the porous membrane has a bubble content of 20% by volume to 60% by volume, an average cell diameter of 10 μm to 150 μm, and The communication rate of bubbles is 30% or more and 80% or less.
The reason why the bubble content of the porous film is limited to the above range is as follows.
That is, when the bubble content is less than 20% by volume, the total volume of bubbles in the porous membrane is insufficient, the hygroscopicity becomes insufficient, and the effect of reducing the feeling of stuffiness of the glove cannot be obtained.

That is, if the average bubble diameter is less than 10 μm, the effect of ensuring a sufficient hygroscopicity by sufficiently increasing the total bubble volume of the porous membrane cannot be obtained . Since the surface area is small, the hygroscopicity is lowered, and there is a problem that moisture cannot be absorbed efficiently.
In contrast, if the average bubble diameter of the porous membrane is in the range of 10 μm or more and 150 μm or less, the total volume of the bubbles in the porous membrane is sufficiently increased to ensure good hygroscopicity, and the surface area inside the bubbles is reduced. Since it can be increased, the moisture absorption of the porous membrane can be improved, moisture can be absorbed more efficiently, and the feeling of stuffiness of gloves can be greatly reduced.

In consideration of further improving this effect and further reducing the feeling of stuffiness of gloves, the average bubble diameter is preferably 70 μm or less even within the above range.
Further, considering that the total bubble volume of the porous film is sufficiently increased to ensure good hygroscopicity, the average bubble diameter is preferably 50 μm or more even within the above range.

Claims (3)

  A glove comprising a porous membrane of rubber or resin, wherein the porous membrane has a bubble content of 20% by volume or more and 60% by volume or less, an average bubble diameter of 150 μm or less, and a bubble communication rate of 30%. Above, the glove characterized by being below 80%.   The glove according to claim 1, wherein the porous film has a bubble content of 35% by volume or more.   The glove according to claim 1 or 2, wherein the porous membrane has an average bubble diameter of 70 µm or less and a bubble communication rate of 50% or more.