JPH042681B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field> The present invention relates to gloves, particularly work or sports gloves made of elastic polyurethane sheet material.

<Conventional technology> Conventionally, gloves for work or sports use
Gloves made of cloth whose palms are coated with rubber latex, ie, so-called rubberized gloves, are known. However, such rubberized gloves have low air permeability and are thick, making them uncomfortable to wear, and especially obstructing the sensation and touch of the fingers, making them unsuitable for precision work or sports that rely on them. Ta. Waterproof gloves made of synthetic resin films or sheets that are fused or cut are also known, but because the base fabric has little stretch, these gloves are significantly larger than the size of the hand, making them difficult to fit around the hand when worn. , it has the same problem as above because it is slippery. In order to overcome these drawbacks, gloves made of a thin film of elastic synthetic resin or rubber are also well known. Although they fit the hand, such elastic films generally have a relatively high modulus, so they feel like they are tied down to the hands and fingers.
Additionally, because of the lack of breathability, sweat accumulates inside, making it uncomfortable to wear.

In order to provide good breathability, sheet materials made of fibers such as woven, knitted or non-woven fabrics are optimal;
Fiber sheet materials that are thin enough not to significantly impede the tactile sensation of the fingers are unsuitable as materials for work or sports gloves because they lack dimensional and structural stability and are susceptible to collapse due to slight friction.
In addition, in order to impart dimensional and morphological stability to such sheet materials, many proposals have been made in the past to bond the intersection points of the constituent fibers through resin processing, etc., but this leads to rough hardening of the sheet material and causes expansion and contraction. The wearability and tactile sensation of the hands and fingers are further impaired.

By applying the polyurethane elastic fiber nonwoven fabric proposed by the inventors in their earlier application, Japanese Patent Publication No. 1-30945 (Japanese Patent Application No. 58-94465), the present inventors have succeeded in improving the properties of existing gloves. The present invention was achieved based on the finding that gloves that solve all of the above-mentioned problems and are particularly suitable for use in work, sports, etc. can be obtained.

<Problems to be Solved by the Invention> The object of the present invention is to provide a material that fits the hand well without causing an unpleasant and excessively tight feeling when worn, and that does not substantially impede the free movement of the fingers. It is an object of the present invention to provide a glove that can maintain a good feel on the hands and fingers.

A further object of the present invention is to provide gloves that are made of a thin fiber sheet material, have appropriate elasticity, air permeability, moisture permeability, and form stability, do not get stuffy, are comfortable to wear, and have good durability. It is in.

Another purpose is that the surface friction resistance is large and the tactile sensation of the hands and fingers is maintained well.
The object of the present invention is to provide gloves particularly suitable for precision work and sports that require delicate hand and finger movement control and reflex movements.

Yet another purpose is to perform work that requires dust-free properties, such as the electronic equipment industry, precision equipment industry, pharmaceutical industry, etc.
An object of the present invention is to provide work gloves suitable for work in the food industry, medical workplaces, etc.

Another purpose is to produce such gloves in large quantities in a simple process.
It can be manufactured cheaply.

Other purposes will become clear from the description below.

<Means for Solving the Problems> According to the present invention, the above-mentioned object is achieved by: The peripheral edges of two elastic polyurethane sheet materials...
The glove is fused to the wrist leaving a wrist opening, wherein at least one of the two elastic polyurethane sheet materials is made of a laminate of an elastic polyurethane nonwoven fabric and an elastic polyurethane film, and the elastic polyurethane film is made of Breaking strength of 20Kg/cm, breaking elongation of 300-900% and 50 of more than 90%
% elongation recovery.

In a preferred embodiment of the invention, one of the two sheet materials may be a selected elastic polyurethane nonwoven fabric, and the other may be a laminate of an elastic polyurethane nonwoven fabric and an elastic polyurethane film.

In a further preferred example of the present invention, the above-mentioned 2
Both sheet materials are laminates of an elastic polyurethane nonwoven fabric and an elastic polyurethane film.
Moreover, it is preferable that at least one sheet material has an embossed pattern.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the structure of the present invention will be explained based on the embodiments shown in the accompanying drawings, together with its operation.

1 and 2 are plan views each showing an example of a glove according to the present invention, and FIG. 3 is an enlarged sectional view taken along the - line in FIG. 1.

The glove according to the present invention is composed of two elastic polyurethane sheet materials, at least one of which is a nonwoven fabric, one sheet forming the palm portion 2, the other forming the upper portion 3, and the second sheet forming the upper portion 3. As shown in FIG. 1, the peripheral edges 5 of the finger section 1, palm section 2, and back section 3 are fused together, leaving a wrist opening 4, corresponding to the outline of the hand. For example, the outline of the hand may be one in which all four fingers other than the thumb are grouped together as shown in Figure 2, or the outline of the hand may be in the shape of the thumb, index finger, or middle finger separated, depending on the purpose.
An appropriate form can be adopted depending on the purpose.

The elastic polyurethane nonwoven fabric most suitably applied to the present invention has been proposed by the present inventors in Japanese Patent Application No. 58-94465. That is, melt-spun polyurethane elastic filaments are laminated without being substantially focused, the contact points of the laminated filaments are joined by the filaments themselves, and the bending resistance (y) satisfies the general formula, y< 0.2x+20 {y represents bending resistance (mm), x represents basis weight (g/m ² )}
This is the range indicated by . It is a polyurethane elastic fiber non-woven fabric with excellent flexibility, stretchability and breathability, and the diameter of this monofilament is usually average
30 microns or less, preferably an average of 25 microns or less, particularly preferably 20 microns or less. The diameter of the monofilament may vary, but it is preferably 50 microns or less at most. As the fiber diameter of the monofilament increases, the nonwoven fabric becomes rough and stiff.

One of the important characteristics of such a nonwoven fabric is that its breaking strength and elongation are extremely high, and its elastic performance is excellent. This is because it directly reflects the performance of the polyurethane elastic fibers that make up the nonwoven fabric, and it is not possible to achieve this with conventional nonwoven fabrics made of inelastic polymers or nonwoven fabrics made of polymers with poor elastic performance such as polyester ether elastics. The performance is unparalleled.

The elongation at break of this nonwoven fabric is usually 300 to 800%, preferably 500% or more. The breaking strength varies depending on the thickness of the nonwoven fabric, but is usually 0.4 to 1.2 kg/cm, preferably 1.0 kg/cm or more. Further, the recovery rate at 100% elongation is usually 85% or more, preferably 90% or more, and the recovery rate at 50% elongation is 90% or more. The strength, elongation, and elongation recovery rate of a nonwoven fabric vary depending on the adhesive strength of the contact points between the fibers that make up the nonwoven fabric. This indicates that the contact points are sufficiently bonded.

In addition, the outstanding feature of this nonwoven fabric is that even though virtually all the fiber intersections are bonded, it exhibits excellent flexibility and stretchability, and is a thin sheet with extremely small fiber diameter and low basis weight. Even if it is, it not only has good dimensional stability and shape stability, but also high durability.

Further, the nonwoven fabric preferably used in the present invention has a basis weight of 50 to 150 g/m ² and has an air permeability of at least 10 c.c./cm ² /sec.

Furthermore, the greatest feature of such nonwoven fabrics is that they are extremely flexible. The bending resistance of a nonwoven fabric (JIS-L-1096 45 degree cantilever method) increases as the basis weight of the nonwoven fabric increases;
The nonwoven fabric of the present invention has a basis weight of x (g/m ² ) and a bending resistance of y.
(mm), y<0.2x+20, and preferably y<0.2x+10.

This feature is achieved by a combination of the physical properties of the polyurethane elastic body, the above-mentioned structure of the nonwoven fabric, and the small diameter of the constituent fibers, and cannot be achieved with conventionally known wet or dry process polyurethane elastic fiber webs. I was unable to do so. Therefore, the bending resistance suitable for the present invention is in the range of 20 to 50 mm.

The above-mentioned nonwoven fabric is produced by laminating substantially continuous filaments obtained by melt-spinning a known thermoplastic polyurethane elastomer into a sheet by injecting a high-temperature gas flow onto the spun yarn and thinning the resulting filament. The contact point of the filament is obtained by joining with the filament itself. That is, a thermoplastic polyurethane elastomer is melted and discharged from a spinneret using, for example, a spinning apparatus described in Japanese Patent Publication No. 41-7883, and the filament is finely blown by, for example, a heated gas stream injected from both sides of the nozzle. turn into something. The attenuated filament is separated from the gas stream without being substantially focused, for example on a collection device such as a moving conveyor net;
Laminated on the net. The stacked filaments are bonded at their contact points by the filaments themselves in the stacked state due to their own heat. Before or after cooling and solidifying after being laminated on the collection device, the layers may be heated and pressed using a roller or the like to be bonded. In order to strengthen the bonding of the contact points between the filaments, the distance from the spinneret to the position where they are stacked on the collection device should not be too long, at most 1 m, preferably 50 cm or less.

The method for measuring each physical property value of the nonwoven fabric is as follows.

[Breaking strength and elongation] A 2 cm wide sample was stretched according to JIS-L-1096 with a grip interval of 5 cm and a pulling speed of 10 cm/min, and the strength and elongation per 1 cm width at break were measured. do.

[100 (50)% elongation recovery rate] A sample with a width of 2 cm is stretched by 100 (50)% with a gripping interval of 5 cm and a pulling speed of 10 cm/min, and immediately recovered to its original length at the same speed. The residual elongation rate L (%) is determined from the recorded load-elongation curve, and the 100 (50)% elongation recovery rate is calculated using the following formula.

100 (50)% elongation recovery rate (%) =100(50)-L/100(50)x100 [Bending resistance] Based on the 45° cantilever method of JIS-L-1096.

[Breathability] A JIS-L-1096 Frazier type tester is used.

The elastic polyurethane film used in the present invention is
Although it can be easily obtained by melt extrusion (molding with a T-die), dry film forming method, or wet film forming method, it is necessary to make a film to give the obtained material good elasticity, flexibility, and practical strength. The thickness of the
Since the thickness is preferably 5 microns or more and 30 microns or less, a film produced by a dry film forming method or a wet film forming method is suitable.

Dry film is produced by applying a polyurethane elastomer dissolved in a solvent onto a release paper using a knife doctor, etc., and then drying it, but the resulting material has good elasticity and flexibility. In order to achieve this, the polyurethane elastic material used must be
A material having a 100% modulus of 40 Kg/cm ² or more and 100 Kg/cm ² or less and a tensile strength of 450 Kg/cm ² or more may be used.

Various types of such polyurethane elastomers are sold by polyurethane elastomer manufacturers, and the required quantity of elastomers can be easily obtained.

Wet film is made by applying a polyurethane elastomer on top of nylon taffeta or polyester taffeta, which has been treated with silicone for good releasability, in the same way as dry film, and then immersing it in water to coagulate the polyurethane into a film ( It is obtained by so-called wet regeneration). As mentioned above, the wet film has low mechanical strength due to its microporosity, but is effective in imparting moisture permeability to the material of the present invention. Various polyurethane elastomers for wet film are also commercially available.
It is preferable to use an elastic material having 100% modulus and tensile strength similar to that of a dry film, and such an elastic material is easily available. The properties of such an elastic polyurethane film include, for example: Breaking strength: 1.0-20.0Kg/cm Breaking elongation: 300-900% 50% elongation recovery rate: 90% or more Moisture permeability: 1500g/ ^m2・24hr. or more Preferably.

In particular, it is preferable that the moisture permeability is 2000 g/m ² /24 hr. or more. Measurement of moisture permeability is JIS-Z-0208
Accordingly, the measurement temperature and humidity were 40℃, 90%RH, and the moisture absorption time was 4 hours.

Methods for imparting moisture permeability to the polyurethane film used in the present invention include a method using a dry film and a wet film as described above. The former method is as disclosed in Japanese Unexamined Patent Publication No. 59-53786.

That is, there is a method of addition polymerizing N-carboxyamino acid anhydride such as glutamic acid-γ-methyl ester-N-carboxylic acid anhydride to polyurethane, and an amino acid modification rate of 2 to 20% is preferable.
Preferably, the polyurethane is used as a film with a thickness of 5 to 50 microns.

In the present invention, at least one of the elastic polyurethane materials is a laminate of the above elastic polyurethane nonwoven fabric and an elastic polyurethane film. In this case, as the adhesive for integrating the polyurethane nonwoven fabric and the polyurethane film, it is preferable to use an adhesive for dry synthetic leather, especially a two-component type thermosetting urethane elastic material. There are many types of such adhesives on the market, but in order not to impair the stretchability and flexibility of the resulting material, one with a relatively low 100% modulus, usually 20 kg/cm ² or more, 50
Use less than Kg/ ^cm2 .

Since the nonwoven fabric and film to be integrated are both polyurethane elastic bodies, integration using adhesive is extremely easy, and the amount of adhesive used is 5 g/m ²
40g/ ^m2 or less, preferably 10g/ ^m2 or more25
When it is less than g/m ² , a material with sufficient adhesive strength and flexibility can be obtained.

In the present invention, the elastic polyurethane sheet material can be used as is to make gloves;
Preferably, at least one of the sheet materials is embossed to provide an embossed pattern on its surface. Formation of such an embossed pattern further enhances the anti-slip effect when the glove is used, and further improves abrasion resistance and dust prevention properties.

Embossing can be carried out, for example, by passing the sheet material between an embossing roller heated to 100 to 150° C. and an elastic roll made of pulp, cotton, or the like.

Examples of the embossed pattern formed on the surface of the sheet material include a dot-like pattern, a polka-dot pattern, a dart-like pattern, a lattice pattern, a striped pattern, a checkered pattern, an arabesque pattern, a wavy pattern, a satin pattern, a leather grain pattern, etc. A dot-like pattern is particularly preferred. In addition,
Patterns consisting of thin lines tend to reduce tear strength and are not preferred.

When the sheet material is an elastic polyurethane nonwoven fabric, the unevenness ratio of the embossed pattern is 1/9 to 9/1,
Preferably it is within the range of 3/7 to 7/3. When the unevenness ratio is within the above range, the bonding between the filaments becomes stronger in the concave portions where the nonwoven fabric is compressed, and the density increases, improving abrasion resistance and dust collection performance. Since convex portions with relatively low density and good air permeability are distributed in an appropriate ratio, sufficient air permeability is guaranteed for practical use. However, if the unevenness ratio is outside the above range, the effect of embossing cannot be obtained, and the breathability and wearing comfort are also poor.

In order to obtain the glove of the present invention, two sheets of the above-mentioned sheet materials are superimposed, for example by a high-frequency welder equipped with a mold corresponding to the contour of the hand.
It is preferable to carry out melt cutting and fusion bonding at the same time.

In that case, at least one of the elastic sheet materials is stretched 70% or less, preferably 10 to 50% in the lateral direction, that is, in the direction perpendicular to the middle finger, in order to facilitate insertion of the hand and obtain appropriate fit. It may also be stacked with other sheet materials. The elongation rate
If it exceeds 70%, it will be easier to insert the hand, but the fit will be poor when worn, and it will be easy to tear when heat-sealing or cutting.

<Effects of the Invention> As mentioned above, the gloves of the present invention are made of two elastic polyurethane sheet materials joined by heat fusion without using sewing threads, so they have great elasticity, fit well on the hand, and are flexible. Therefore, there is less discomfort when wearing it.

In addition, since the gloves of the present invention are made of a highly elastic polyurethane sheet material with a relatively small modulus and a high elongation recovery rate, the gloves of the present invention fit comfortably on the hand with a small feeling of tightness, and do not interfere with the free movement of the fingers. do not have. Furthermore, since it has appropriate air permeability and moisture permeability, the inside does not get stuffy and sweat does not accumulate, making it comfortable to wear.

Furthermore, those made of a sheet material that is thin enough not to substantially inhibit the feel of the hands and fingers,
It is suitable as a glove for precision manual work that relies on the senses of the fingers and for sports where delicate motor control and reflex movements are important.Although it is thin and breathable, the intersections of the constituent fibers of the nonwoven fabric are Because it is completely glued together, it has good dimensional and form stability.
It has the unique advantage of having a long service life.

In addition, since the surface frictional resistance is large, the object gripped by the glove does not easily slip.Furthermore, since the elastic polyurethane nonwoven fabric used in the gloves of the present invention is substantially composed of continuous filaments, it itself is dust-generating. In addition, if the palm part is made of a sheet material containing polyurethane film or embossed with elastic polyurethane non-woven fabric, even if sweat or grime comes out from the hand, it will not transfer and adhere to the object you grip. It has sufficient ability to prevent dust from passing through.

Because of these features, the gloves of the present invention
Anti-slip gloves for surgery, for working with glass bottles, for chemical experiments, for driving cars, for various sports such as golf, tennis, and baseball, for general household use, or for electronic equipment such as semiconductor devices, They are useful as gloves for use in environments where dust-free properties are required, such as precision equipment industries such as watches, pharmaceutical and food industries, and medical workplaces.

In addition, high frequency welders etc. can be used, so
Since it can be mass-produced at low cost, it can be manufactured extremely advantageously in terms of cost.

[Brief explanation of drawings]

1 and 2 are plan views each showing an example of a glove according to the present invention, and FIG. 3 is an enlarged sectional view taken along the - line in FIG. 1. 1...Finger part, 2...Palm part, 3...Back part, 4...
Wrist opening, 5... periphery.

Claims (1)

[Scope of Claims] 1. A glove in which the peripheral edges of two elastic polyurethane sheet materials are fused leaving a wrist opening, wherein at least one of the two elastic polyurethane sheet materials is an elastic polyurethane nonwoven fabric. It consists of a laminate with an elastic polyurethane film, and the elastic polyurethane film has a breaking strength of 1 to 20 kg/cm, a breaking elongation of 300 to 900%, and a 50%
% elongation recovery rate. 2. The glove according to claim 1, wherein both of the two polyurethane sheet materials are a laminate of an elastic polyurethane nonwoven fabric and an elastic polyurethane film. 3. The glove of claim 1, wherein the elastic polyurethane film of the laminate is located on the outside of the glove. 4. A glove according to claim 1, wherein the elastic polyurethane film of the laminate is located on the inside of the glove. 5. The glove according to claim 1, wherein one of the two polyurethane sheet materials is a laminate of an elastic polyurethane nonwoven fabric and an elastic polyurethane film, and the other is an elastic polyurethane film. 6 The elastic polyurethane nonwoven fabric is composed of filaments having an average fiber diameter of 50μ or less, and
Claim 1: The filament has a basis weight of 150 g/m ² and an air permeability of at least 10 c.c./cm ² /sec, and the contact points of the filament are substantially joined by the filament itself. The glove according to any one of items 5 to 5. 7 The elastic polyurethane nonwoven fabric has a breaking elongation of 300 to 800%, a breaking strength of 0.4 to 1.2 Kg/cm, a 100% elongation recovery rate of 85% or more, a 50% elongation recovery rate of 90% or more, and a stiffness of 20 to 50 mm. The glove according to claim 6, which has softness. 8 The average fiber diameter of the elastic polyurethane nonwoven fabric is
Claim 6 or 7 which is 30μ or less
Gloves as described in section. 9 The elastic polyurethane film weighs 1500g/
^m2 ． The glove according to any one of claims 1 to 8, which has a moisture permeability of 24 hours or more. 10 Moisture permeability is 2000g/ ^m2 . The glove according to claim 9, which lasts for 24 hours or more. 11. The glove according to any one of claims 1 to 10, wherein at least one of the two elastic polyurethane sheet materials has an embossed pattern.