JP6038461B2 - Gloves and method of manufacturing gloves - Google Patents

Description

The present invention relates to a glove on which a rubber or resin coating is applied and a method for manufacturing the glove .

  General-purpose thermoplastic synthetic fibers such as nylon and polyester fibers, which are widely used as clothing and industrial materials, melt at about 250 ° C. and have a critical oxygen index of about 20, and burn well in air. Therefore, these general-purpose thermoplastic synthetic fibers are used in clothing products that are used in scenes with a high risk of exposure to flames and high heat, such as fire fighting clothes, racing suits for automobile racing, steel work clothes or welding work clothes, gloves It cannot be said that it is suitable as a protective fiber material.

  Heat resistant and highly functional filament yarns such as aramid fiber, wholly aromatic polyester fiber or polyparaphenylene benzobisoxazole fiber do not melt at about 250 ° C., and their decomposition temperature is as high as 400 ° C. or higher. In addition, the critical oxygen index is about 25 or more, and in the air, it burns when the flame, which is a heat source, is brought closer, but when the flame is moved away, the combustion does not continue.

  Thus, the heat-resistant and highly functional filament yarn is a material excellent in heat resistance and flame retardancy. Therefore, for example, aramid fibers, which are heat-resistant and high-performance filament yarns, are used for clothing products in situations where there is a high risk of exposure to flames or high heat, such as fire-fighting clothes, racing suits for automobile racing, iron-making work clothes or welding work clothes. It is used favorably as protective clothing such as gloves. Above all, para-aramid fibers, which have both high heat resistance and heat resistance, are used in sports clothing, work clothes, ropes, tire cords, etc. that require tear strength and heat resistance, and because they are difficult to cut by blades, they are wounded. It is also used for work gloves for prevention.

  As the para-aramid fiber, polyparaphenylene terephthalamide (PPTA) fiber is well known. For example, US Pat. No. 3,767,756 and Japanese Patent Publication No. 56-128312 describe a method for producing PPTA fiber. It is disclosed. On the other hand, meta-aramid fibers do not have cut resistance and high tensile strength like para-aramid fibers, but their heat resistance makes them suitable for fire fighting clothes, heat insulating filters, heat-resistant dust filters, and electrical insulating materials. It is used.

  Conventionally, when producing textile products such as clothing products using these heat-resistant and high-performance filament yarns, the fibers have only been used in the form of filament yarns and spun yarns that are not stretchable. However, even if a non-stretchable yarn such as a filament yarn or a spun yarn is processed into a fabric to produce a clothing product such as a fire fighting suit, a racing suit or a work suit, the stretchability of the clothing product is inferior. When the apparel product is worn, there are disadvantages that it is not comfortable to wear and is difficult to act. Similarly, conventional work gloves made from non-stretchable yarns have a poor feeling of wear and have been a cause of lowering work efficiency.

  In view of such market demands, many studies and proposals have been made on methods for imparting crimps to heat-resistant and highly functional filament yarns. For example, a method in which a low elastic modulus fiber is mixed with a high elastic modulus fiber such as a para-aramid fiber and crimped by an indentation method (Patent Document 1). In the case of a system aramid fiber, after a false twist crimping process using a non-contact heater heated to 390 ° C. or more and less than 460 ° C., a method of imparting crimp by relaxing heat treatment (Patent Document 2), para system aramid fiber, etc. A method of performing a heat setting by hydrothermal treatment at 130 to 250 ° C. or a dry heat treatment at 140 to 390 ° C., and then untwisting the twist after adding twist to the heat-resistant and high-performance fiber yarn (Patent Document 3) Etc. are known.

  Combustion resistance, heat resistance, stretchability can be achieved by composing a woven or knitted fabric using a coated yarn made by spinning a spun yarn or crimped yarn of a para-aramid fiber around an elastic fiber having stretch properties. It has also been reported that protective gloves and the like having excellent resistance can be obtained (Patent Documents 4 to 6).

  Patent Documents 5 and 6 disclose a crimped yarn of para-aramid fiber having an expansion / contraction recovery rate in the range of 4 to 80%. Specifically, in Patent Document 5, the twisted yarn is subjected to high-temperature high-pressure steam or high-temperature high-pressure water treatment (so-called wet heat treatment) at 130 to 250 ° C., or dry heat treatment heated in air, It is described that after setting a twist, a crimped yarn can be obtained by untwisting the twisted yarn in the opposite direction. In Example 1, the para-aramid fiber to which twist was added was subjected to saturated steam treatment at 200 ° C. for 15 minutes to set the twist, and then untwisted to obtain a stretch elongation ratio of 29.0%. A crimped yarn having a restoration rate of 8.2% was obtained. In Example 4, the twisted para-aramid fiber was subjected to a dry heat treatment at 100 ° C. for 30 minutes, and then twisted and then untwisted. Thus, a crimped yarn having an expansion / contraction elongation ratio of 29.0% and an expansion / contraction restoration ratio of 8.0% is obtained.

  And in patent document 6, the glove which knitted the crimped yarn of the para system aramid fiber obtained in Example 1 of patent document 5 around the elastic fiber using the covering yarn formed by winding, It is described that a glove coated with a urethane resin is stretchable, fits well in the hand, and is easy to work with.

  However, in protective gloves and the like, at least a part of the upper side and the palm side is covered with a rubber or resin coating material to provide waterproofness or reinforcement. Since the adhesion between the coating material and the glove material is poor, the coating material peels off while the glove is being used, and there is a problem that a durable glove cannot be obtained.

  On the other hand, increasing the amount of coating material applied to improve the adhesion and durability of the coating deteriorates the fit of the glove and the workability when worn, and the coating material firmly restrains the high-strength fibers. As a result, the degree of freedom of the single fiber is reduced, resulting in a problem that the cut resistance is reduced.

Japanese Patent Laid-Open No. 1-192839 JP-A-6-280120 JP 2001-248027 A JP 2004-11060 A JP 2003-193345 A JP 2003-193314 A

In view of the background of the prior art, the present invention provides a glove and a method for manufacturing a glove that have good adhesion to a rubber or resin coating material, excellent durability, and that fit well in the hand and have high work efficiency. It is something to be done.

The above-described problem is solved by the glove described in claim 1 of the present application. The glove according to claim 1 of the present application is a glove-shaped first layer formed of rubber or a resin material, disposed on the outside of the first knitted layer, and has a glove-shaped second layer and the first layer. A knitted layer disposed between the layer and the second layer and knitted in a glove shape, the second layer is formed of rubber or a resin material, A core yarn and a sheath yarn made of high-strength fibers having a tensile strength measured according to JIS L 1013 8.5 according to JIS L 1013 8.5 as a characteristic, and the knitted layer has The sheath yarn is knitted around the core yarn with the sheath yarn wound around and subjected to at least heat treatment, and the sheath yarn is measured in accordance with JIS L 1013 8.16 A method. The bulk height is 40 cm ³ / g or more, JIS L 1013 8.16 A method According bulky compression modulus measured by 80% or more, and, JIS L 1013 8.11 analogously to Method A measured stretching elongation of 20% or more, the condition fulfills simultaneously, 90 as before Symbol heat treatment When ℃ subjected to warm water treatment of 20 minutes, a higher due crimped yarn more than 5% from the previous value the umbrella elevation value is subjected to the hot water treatment.

Suitably, the bulk height of the sheath yarn is 40 to 80 cm ³ / g .

Preferably, the bulky compression elastic modulus of the sheath yarn is 80 to 95% .

Preferably, the expansion / contraction rate of the sheath yarn is 20 to 70% .

Preferably, the crimp yarn has a strength retention of 25% or more .

Preferably, the sheath yarn is a crimped yarn of para-aramid fiber .

Preferably, the core yarn is an elastic fiber .

Preferably, the coated yarn has a draft ratio of the core yarn of 1.5 to 5.0 and a twisting coefficient (K ₂ ) of the covering of the sheath yarn of 500 to 5,000.
(However, T represents the number of twists (times / m) of the cover ring, and D represents the fineness (tex). )

Preferably, the second layer is natural rubber latex .

Preferably, the knitting layer has a higher knitting density of the covering yarn than that of the other portions where the blade is likely to come into contact during operation .

Preferably, the portion of the coated yarn having a high braid density is at least a fingertip portion .

Preferably, the color of the knitting layer is different from the color of the second layer .

Preferably, the color of the first layer is different from the colors of the second layer and the knitting layer.
The above-described problem can also be solved by the glove manufacturing method described in claim 14 of the present application. In the method for manufacturing a glove according to claim 14 of the present invention, the glove is provided with a glove-shaped first layer formed of rubber or a resin material, the glove-shaped second layer disposed on the outside of the first layer, and the glove-shaped second layer. And a knitted layer disposed between the first layer and the second layer and knitted to form a glove shape, the second layer being a rubber or resin material The knitted layer is formed of a core yarn and a sheath yarn made of high-strength fibers having a tensile strength measured according to JIS L 1013 8.5 as a characteristic of the original yarn of 1.75 N / tex or more, The knitted layer is knitted using a coated yarn in which the sheath yarn is wound around the core yarn and at least heat-treated, and the sheath yarn is JIS L 1013 8.16 umbrella was measured according to a method altitude 40 cm ³ / g or more, J S L 1013 8.16 A method measured according to the bulked compressive modulus of 80% or more, and, JIS L 1013 8.11 analogously to Method A measured stretching elongation of 20% or more, of the condition at the same time meet together, when subjected to hot water treatment of 90 ° C. 20 minutes as a pre-Symbol heat treatment, the bulk altitude values are higher due crimped yarn 5% or more compared to the previous value subjected to the hot water treatment.
Preferably, the sheath yarn is a crimped yarn of para-aramid fiber, and after high-strength fiber is twisted, heat setting is performed by dry heat treatment at a heater temperature of 470 to 550 ° C. Subsequently, it is obtained by untwisting the twist.
Preferably, the second layer is a natural rubber latex formed by a dip forming method.

The glove and the method for manufacturing a glove of the present invention are knitted with a covering yarn using bulky and stretchable crimped yarn as a sheath yarn, which has not been obtained in the past. Since the coating material of rubber or resin enters into the gap of the sheath yarn properly and adheres, the coating material is excellent in adhesiveness and the coating material does not easily peel off after long-term use. Good fit of gloves and workability when worn. Moreover, the problem of a cut resistance fall resulting from the fall of the freedom degree of a single fiber does not arise easily.

It is a schematic side view which shows an example of the covering yarn used by this invention. It is a schematic diagram which shows an example of the manufacturing method of the covering yarn used by this invention. It is the schematic which shows the glove which concerns on this invention.

  Hereinafter, details of the glove of the present invention (see FIG. 3) will be described.

  In the coated yarn used for knitting the glove of the present invention, as the core yarn, other than general-purpose fibers such as polyester fiber, polyamide fiber, rayon fiber, polyvinyl alcohol fiber, meta-aramid fiber, para-aramid fiber, Heat-resistant and high-strength fibers such as wholly aromatic polyester fibers, polyparaphenylene benzobisoxazole fibers, and polyketone fibers, metal fibers, glass fibers, ceramic fibers, and elastic fibers can be used. These fibers may be used alone or in combination of two or more.

  Among the fibers, as the core yarn in the coated yarn, an elastic fiber having stretchability is preferably used from the viewpoint that stretchability is imparted to the coated yarn. The elastic fiber is preferably a polyurethane elastic fiber having high stretchability. The polyurethane elastic fiber is not particularly limited in cross-sectional shape, and may be circular or flat. The fiber may be a monofilament or a welded multifilament. Good.

  The fineness of the elastic fiber is preferably in the range of 11 to 940 dtex, and more preferably in the range of 22 to 350 dtex. If it is 11 dtex or more, it will not cause thread breakage in the covering and glove knitting process, and it will have excellent fit when worn on gloves, and if it is 940 dtex or less, it will not match the gauge number of the glove knitting machine There is nothing. Further, the elongation at break is preferably 300% or more, and if it is less than 300%, sufficient stretchability may not be obtained when the glove is formed.

  In the coated yarn used for knitting the glove of the present invention, the sheath yarn is crimped from a fiber having a tensile strength measured according to JIS L 1013 8.5 of 1.75 N / tex or more as a characteristic of the original yarn. A crimped yarn is used. When the tensile strength is less than 1.75 N / tex, the coated yarn cannot be imparted with a high degree of bending resistance and wear resistance, and is unsuitable for knitting protective gloves. Preferably, it is about 1.75 to 3.5 N / tex.

  From the viewpoint of tensile strength and wear resistance, the material constituting the above-described sheath yarn is para-aramid fiber, wholly aromatic polyester fiber, polyparaphenylene benzobisoxazole fiber, polyketone fiber, polyamideimide fiber, LCP ( It is preferable to use heat-resistant and high-strength fibers such as (liquid crystal polymer) fibers. Among these materials, para-aramid fibers are preferred because they are excellent in high strength characteristics and cut resistance as well as heat resistance and flame retardancy.

  Here, as the para-aramid fiber, polyparaphenylene terephthalamide fiber (manufactured by Toray DuPont, trade name “Kevlar”), copolyparaphenylene-3,4′-diphenyl ether terephthalamide fiber (manufactured by Teijin Techno Products) , Trade name "Technora"). Among these, polyparaphenylene terephthalamide fibers (trade name “Kevlar” manufactured by Toray DuPont) are particularly preferred because of their high strength, high elastic modulus, and excellent cut resistance and heat resistance.

  Examples of the wholly aromatic polyester fiber include a product name “Vectran” manufactured by Kuraray Co., Ltd., and examples of the polyparaphenylene benzobisoxazole fiber include a product name “Zylon” manufactured by Toyobo Co., Ltd. Examples of the polyketone fiber include “Cyvalon” manufactured by Asahi Kasei Fibers, polyetherketone (PEK) fiber, polyetherketoneketone (PEKK) fiber, and polyetheretherketone (PEEK) fiber. Examples of the polyamide-imide fiber include a product name “Kelmer” manufactured by Rhone-Poulenc.

  The sheath yarn used for the covering yarn for knitting the glove of the present invention is a crimped yarn obtained by crimping a high-strength fiber having a tensile strength characteristic as described above, and the following (1) to It satisfies the characteristic (3) at the same time. The hot water treatment at 90 ° C. for 20 minutes is performed to fix the twist.

(1) Bulk height measured according to JIS L 1013 8.16 A method at 90 ° C. for 20 minutes after warm water treatment is 40 cm ³ / g or more (2) JIS L 1013 after warm water treatment at 90 ° C. for 20 minutes 8.16 Bulky compression modulus measured according to A method is 80% or more (3) JIS L 1013 8.11 Stretch elongation measured according to A method is 20% or more

  Since the sheath yarn constituting the coated yarn satisfies the above conditions (1) to (3) at the same time, the adhesion between the fiber and the coating material is good, and the coating material is difficult to peel off even when used for a long period of time. Gloves with a sense of volume can be obtained. If any one of the above (1) or (2) is not satisfied, the coating material does not appropriately enter the fiber space constituting the glove, so that the peel strength between the coating layer and the fiber layer of the glove is low. It becomes insufficient. Moreover, when not satisfy | filling the expansion-contraction elongation rate of said (3), it will be inferior to the wearing feeling of a glove. The bulk height of (1) above is desirably 5% or more, preferably 15% or more, higher than the value before the 90 ° C. hot water treatment. Better gloves can be obtained.

  Filament yarns that are less prone to fluff and dust are used for yarns made of high strength fibers.

  In the present invention, the crimped yarn used as the sheath yarn is a twisting process in which a yarn made of high-strength fibers such as aramid fibers is twisted, and then heat treatment without using high-temperature high-pressure steam or high-temperature high-pressure water, that is, dry heat treatment It is manufactured by carrying out the process and the untwisting process for further unwinding the twist. Examples of the manufacturing method include a continuous false twisting method or a batch (non-continuous) manufacturing method. More preferably, the crimped yarn has a high bulkiness, that is, a crimped yarn having a high bulkiness and a high bulkiness and a high elastic modulus of elasticity is obtained, and that the fibers of the crimped yarn are scattered, that is, the solution This is a continuous false twisting method because the twisted state is good.

  More specifically, a manufacturing method using the continuous false twisting method will be described.

  In this false twisting method, the yarn drawn from the supply yarn cheese by the feed roller is wound up on a take-up bobbin through a heater, a false twist device, and a take-up roller. In the false twisting device, for example, a false twist spindle can be equipped with a spinner, and when the yarn is wound around the spinner pin and the spindle is rotated, the yarn between the feed roller and false twist spindle is, for example, S twisted. The twisted yarn is heat set (dry heat treatment) with a heater and twisted by adding, for example, a Z twist opposite to the above between the false twist spindle and the take-up roller. Is unwound (untwisting step) to become a crimped yarn. A space between the false twisting device and the take-up roller is a cooling zone, which is preferably left to air cooling. In addition to the above-mentioned false twist spindle, the false twisting method is a method in which the yarn is brought into contact with the inner wall of a cylinder that rotates at high speed, the outer periphery of a disk, or the surface of a belt that runs at high speed, and the false twist is applied by friction, that is, a nip belt, A friction disk or the like is used.

In the false twisting method, the number of false twists by the false twist spindle is a twist coefficient (K ₁ ) represented by the following formula (1) in order to appropriately crimp the yarn and prevent the fibers from being cut due to excessive twisting. ) Is about 5,000 to 11,000, preferably about 6,000 to 9,000.

K ₁ = t × D ^1/2 (1)
[However, t represents the number of false twists (times / m), and D represents the fineness (tex). ]

  When twisting with a false twist spindle, a spinner of 1 pin, 2 pins, 4 pins can be used.

  The temperature condition of the heat setting in the dry heat treatment is preferably high temperature treatment so that the crimped yarn has the desired bulkiness and stretchability, and is preferably near the decomposition start temperature of the raw fiber. The preferred temperature condition varies depending on the raw fiber, but the atmospheric temperature inside the heater through which the yarn passes, that is, the heater temperature is about 400 to 700 ° C, more preferably 500 to 600 ° C. In the case of para-aramid fibers, the temperature is preferably 470 to 550 ° C.

  The heater in the dry heat treatment may be a contact heater or a non-contact heater, and may be performed by a known means. The heating time varies depending on the type of fiber, the thickness of the yarn, the heating temperature, and the like, and thus cannot be generally stated, but usually about 0.005 to 1 second is desirable. The range is preferably about 0.01 to 0.1 seconds.

  The dry heat treatment may be performed under pressure, under reduced pressure, or normal pressure, but in normal continuous false twisting, it is preferably performed under normal pressure.

  In the production method by the false twisting method, when producing a crimped yarn of para-aramid fiber, the moisture content is preferably 20% or less, more preferably 15%, as the para-aramid fiber before false twisting. In the following, it is particularly preferable to use 1 to 10%. In this case, in the above formula (1), D represents the fineness (tex) containing moisture. If the moisture content before twisting exceeds 20%, heat is not efficiently transferred to the yarn in the dry heat treatment and the heat setting effect cannot be obtained, so that it is difficult to obtain a good crimped yarn. If the moisture content is less than 1%, the yarn may fibrillate due to rubbing of the yarn path guide or the like.

  In the false twisting method, the strength retention of the crimped yarn is preferably 25% or more, preferably 30% or more, more preferably 40% or more, as a measure that the strength of the high strength fiber does not decrease. It is. The strength retention can be calculated from the following formula.

  Strength retention ratio (%) = {Strength of crimped yarn (N / tex) / Strength of raw yarn of high strength fiber (N / tex)} × 100

The glove of the present invention has a bulk height measured according to the method of JIS L 1013 8.16 A after the warm water treatment at 90 ° C. for 20 minutes of the crimped yarn produced as described above is 40 cm ³ / g or more, preferably 40 to 80 cm ³ / g, more preferably 45 to 70 cm ³ / g is used as the sheath yarn. Moreover, the bulky compressive elastic modulus measured according to the same method of this sheath yarn is 80% or more, preferably 80 to 95%, more preferably 85 to 90%.

When the bulk height is less than 40 cm ³ / g and / or when the bulk high compression modulus is less than 80%, the adhesion to the coating material is deteriorated. On the other hand, when the bulk height exceeds 80 cm ³ / g and / or when the bulk high compression modulus exceeds 95%, the coating material excessively penetrates into the fiber space, and the glove wearing feeling and cut resistance are cut off. May be reduced. In particular, in the present invention, by raising the heat setting temperature at the time of crimped yarn production, the untwisted state of the false twisted yarn is improved, and the bulky compression elastic modulus of the crimped yarn is improved. Adhesion improves by entering.

  The crimped yarn of high strength fiber has a stretch / elongation rate of 20% or more, more preferably 20 to 70%, measured according to JIS L 1013 8.11 A method. If the stretch / elongation rate is less than 20%, the adhesiveness of the coating material when the surface of the glove is coated with rubber or resin is poor. On the other hand, if it exceeds 70%, the harmony with the core yarn, particularly the elastic fiber, is poor. As a result, irregularities are generated on the outer surface of the glove, so that the rubber or resin coated on the surface of the glove is likely to float, resulting in poor workability.

  The fineness and the number of filaments of the sheath yarn made of such high-strength fibers may be appropriately selected in consideration of the surface appearance, heat resistance, stretchability, texture and the like according to the purpose of use. The fineness of the sheath yarn is preferably in the range of 20 to 1600 dtex depending on the purpose of use.

  Furthermore, the single fiber fineness of the sheath yarn is preferably in the range of 0.1 to 10 dtex, more preferably in the range of 0.4 to 5 dtex, depending on the application. If it is less than 0.1 dtex, the yarn-making efficiency is low and the cost increases. If it exceeds 10 dtex, the rigidity is high and it is not suitable for a glove that requires flexibility.

  The coated yarn used in the present invention may be one in which the sheath yarn is coated around the core yarn from the viewpoint of obtaining excellent stretchability, and the sheath yarn is the core yarn from the viewpoint of obtaining excellent coating properties. It may be one in which the surroundings of doubly coated. In this double-coated yarn, the first coating is referred to as the lower twisted yarn, and the double coating is referred to as the upper twisted yarn. In the case of double coating, in order to cancel the torque, it is preferable that the twist direction of the upper twisted yarn cover ring is opposite to the twist direction of the lower twisted yarn cover ring. FIG. 1 is a schematic side view of a single-coated yarn showing an example of a coated yarn. In the coated yarn A, the core yarn 1 is covered with a sheath yarn 2 in a single winding manner.

  Next, the manufacturing method of the coated yarn of this invention is demonstrated. FIG. 2 is a schematic diagram showing an example of a method for producing a coated yarn of the present invention.

  In the present invention, an elastic fiber is used for the core yarn. Polyurethane elastic fibers are preferably used as the core yarn, and the crimped yarn of the high-strength fiber is preferably coated as a sheath yarn from above.

  In the double coating, the upper twisted yarn, the lower twisted yarn, or both are coated with the crimped yarn of the high strength fiber as a sheath yarn. When the crimped yarn of the high strength fiber is used as the sheath yarn for either the upper twist yarn or the lower twist yarn, the other sheath yarn uses a filament of a known fiber other than the high strength fiber, such as polyester or nylon fiber. be able to.

  For coating, a commercially available covering machine or the like is preferably used.

  FIG. 2 shows an example of double coating. In FIG. 2, the polyurethane-based elastic fiber used as the core yarn 1 is positively fed by the rolling yarn feeding roller 3, pre-drafted with the feed roller 4, and then the feed roller. Further draft between 4 and the delivery roller 11. The draft magnification in this case refers to the entire draft, that is, the draft between the yarn feeding roller 3 and the delivery roller 11.

  The sheath yarn 2 is wound around the H bobbin 9 by a commercially available high-speed winder, and then installed on the lower spindle 5 and the upper spindle 7 as shown in FIG. 2, and is wound around the core yarn by rotating the spindle. Yarn A is formed.

  The obtained coated yarn A is wound around the cheese 14 by the take-up roller 13.

  When producing a single-coated yarn, one H bobbin 9 is installed on either the upper spindle 7 or the lower spindle 5 and the sheath yarn 2 is wound around the core yarn 1 by rotating the spindle.

  When the sheath yarn is coated on the core yarn, the number of twists of the sheath yarn covering is appropriately selected according to the fineness of the sheath yarn. When the sheath yarn is coated on the core yarn, the draft ratio of the core yarn is about 1.5 to 5.0, preferably 2.0 to 4.0. If it is less than 1.5, it will be difficult to cover the sheath yarn in the covering step, and if it exceeds 5.0, it will be easy to break the yarn in the covering step, resulting in poor productivity.

Further, the value is about 500 to 5,000 of twist factor _{(K 2)} represented by the following formula (2), preferably about 1,000-3,000. When the twisting coefficient is less than 500, the sheath yarn is not sufficiently covered with the core yarn in the coated yarn, and when the glove is made, the core yarn is exposed and the surface quality of the glove is deteriorated. The properties such as adhesiveness also deteriorate. If it exceeds 5,000, yarn breakage or the like is likely to occur in the covering process, the process passability is deteriorated, and the sheath thread is tightened. It will not be reflected. The twisting may be either single coating or double coating, and is not particularly limited.

K ₂ = T × D ^1/2 (2)
[However, T represents the number of twists (times / m) of the cover ring, and D represents the fineness (tex). ]

  Further, in the case of double coating, in order to cancel the torque, it is preferable that the twist direction of the upper twisted yarn cover ring is opposite to the twist direction of the lower twisted yarn cover ring.

  In particular, in the case of polyurethane-based elastic fibers, if the polyurethane-based elastic fibers are exposed on the surface of the coated yarn, the physical properties of the core yarn deteriorate due to swelling and dissolution when a solvent-based coating material is used. Furthermore, polyurethane-based elastic fibers are inferior in heat resistance, so when using gloves, the polyurethane-based elastic fibers are quickly deteriorated by heat and decomposed, resulting in a decrease in adhesion to the coating material, which may cause the coating material to peel off. .

  Gloves also apply a force to peel off the surface coating material during use. Therefore, if the sheath yarn is wound around the core yarn too many times, the bulkiness of the sheath yarn is not reflected in the coated yarn, and the coating material is less likely to enter the gap between the sheath yarns. It will not adhere to the coated yarn. When the adhesion between the coated yarn and the coating material is low, the coating material is peeled off from the surface of the glove, and the durability is lowered because the glove is broken without being reinforced.

  In the present invention, the above-described coated yarn is knitted into the knitted layer 107 to produce a glove. For the knitting layer 107, a commercially available computer glove knitting machine SFG or STJ (manufactured by Shima Seiki Co., Ltd.) is adopted for convenience.

  As the coating material, polyurethane resin, vinyl chloride resin, latex, synthetic rubber, natural rubber, or the like is used. In the present application, natural rubber latex is particularly used, but the present invention is not limited to this.

  The coating with natural rubber latex is formed by a dip molding method. That is, it is formed by attaching the produced glove to a hand mold and the like, impregnating the glove with a coating material of natural rubber latex, and drying and vulcanizing. Alternatively, the coating material is attached to the surface of the glove by attaching and adhering rubber or resin to the glove. Thereby, in addition to characteristics such as heat resistance and cut resistance, it is possible to produce a glove that has both wear resistance and water resistance and is not slippery when grasping an object.

  The coating material may be applied to at least a part of the glove surface. It can be applied to almost the entire palm side and fingertips, or to the entire surface including the upper side, or only to the specified fingertips. It may be allowed to take other forms.

  Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to these examples.

  The evaluation method of each physical property was based on the following method.

[Fineness]
JIS L 1013: 2010 Chemical fiber filament yarn test method 8.3 Measured by B method (simple method).

[Tensile strength]
The tensile strength was measured by JIS L 1013: 2010 chemical fiber filament yarn test method 8.5.

[Elasticity]
JIS L 1013: 2010 Chemical fiber filament yarn test method 8.11. The stretch / elongation rate was measured by A method. As a pretreatment before the measurement, the measurement sample was skeined and wrapped in gauze, followed by a hot water treatment at 90 ° C. for 20 minutes, followed by natural drying at room temperature.

[Bulkyness]
As a pre-treatment before measurement, JIS L 1013: 2010 was prepared by subjecting the measurement sample to a standard state after performing warm water treatment at 90 ° C. for 20 minutes while being wrapped in gauze and naturally dried at room temperature. Chemical fiber filament yarn test method 8.16. The bulk height (cm ³ / g) and bulk high compression modulus (%) were measured by the A method.

[Cut resistance]
JIS T 8052: 2005 Protective clothing-Mechanical properties-Measured by a cutting resistance test method for sharp objects.

[Adhesiveness of coating material]
JIS K 6404-6: 1999 Test method for rubber and plastic cloth-Part 6: Treating 500 times with a load of 0.5 kg by a fir test. In the case where the coating part was not peeled off by visual judgment, the test was accepted and the others were rejected. The direction of the test piece was only the vertical direction.

[Evaluation of wearing gloves]
A wearing test with five subjects was performed. According to EN 420: 2003 Protective gloves-General requirements and test methods 5.2, all subjects gave Dexterity a level 5 performance evaluation, and more than 3 out of 5 in the sensory evaluation were "good to wear" Those that were evaluated as “pass” were accepted, and others were rejected.

[Example 1]
Polyparaphenylene terephthalamide fiber (hereinafter referred to as PPTA) having a total fineness of 440 dtex, a single fiber fineness of 1.7 dtex, a filament number of 267, a tensile strength of 2.03 N / tex, and a moisture content of 7% (Toray DuPont) Manufactured and trade name “Kevlar” (registered trademark)), false twisting speed: 60 m / min, false twisting temperature (dry heat): 500 ° C., number of false twists t: 1150 times / m , False twisting direction: S direction, spindle rotation speed: continuous false twisting under processing conditions of 69000 rpm, crimped yarn of PPTA filament with 40% strength retention (twisting coefficient (K ₁ ) = 7628) Got. Table 1 shows the crimp characteristics of the obtained crimped yarn.

Using the covering process shown in FIG. 2, a core yarn made of polyurethane elastic fiber having a fineness of 117 dtex and a breaking elongation of 530% (manufactured by Toray Operontex Co., Ltd., trade name “Lycra” (registered trademark)) Further, a 156 dtex nylon fiber woolly processed yarn (twisting direction: Z twist) is spirally wound as a sheath yarn under twist, and further as a sheath yarn over twist, the para-aramid fiber cocoon obtained above The crimped yarn was spirally wound in the opposite direction to the nylon fiber wooly processed yarn, and a coated yarn was obtained under the following processing conditions.
Spindle speed: 5000rpm
Draft of core yarn: Covering twist number T of 3.0-fold sheath yarn lower twisted yarn and its twist direction: 700 times / m, Z direction, twist factor (K ₂ ) = 2766
Covering twist number T of the twisted yarn on the sheath yarn and its twist direction: 300 times / m, S direction, twist coefficient (K ₂ ) = 1990

One of the obtained coated yarns was supplied to a 13 gauge type glove knitting machine (Shimane Seiki Seisakusho Co., Ltd.), and gloves having a weight of 18 g / sheet and a palm weight of 360 g / m ² were knitted. This glove has a soft and voluminous texture, is highly stretchable, has a good fit, has excellent combustion resistance and heat resistance, and is difficult to cut with a blade (cutting force: 6.5 N). It was.

As a coating material, DIC Corporation Chris Bon MP105, which is a wet porous layer film-forming urethane resin dissolved in DMF, was diluted with DMF to a concentration of 11% and used. The knitted gloves were immersed in the urethane solution and pulled up while being put on a hand mold. Next, it was immersed in warm water at 50 ° C. for 60 minutes, and the solvent DMF of the resin solution was replaced with water. Then, he pulled up from the water, dried, by removing from the hand type, weight 21g / sheets, the resin coating weight 105 g / m ² of the palm, and the coating material on one surface to produce unlined gloves were deposited.

  This glove has good adhesion to the coating material and excellent grip (non-slip) properties. Therefore, the glove was suitable as a highly safe work glove used for painting work for automobiles and aluminum building materials.

[Example 2]
A glove was manufactured in the same manner as in Example 1 except that a PPTA filament yarn having a total fineness of 440 dtex, a single fiber fineness of 3.3 dtex, a filament count of 134, a tensile strength of 2.03 N / tex, and a moisture content of 7% was used. Was made. The strength retention of the crimped yarn obtained at this time was 38%. Table 1 shows the crimp characteristics of the obtained crimped yarn.

The resulting glove weighs 18.5 g / sheet, has a palm weight of 350 g / m ² , has a soft and voluminous texture, is highly stretchable, has a good fit, and is flame and heat resistant. It was excellent in properties and difficult to cut with a blade (cutting force: 8.4 N).

A glove coated with urethane resin by the same method as in Example 1 is a back glove having a weight of 21.5 g / sheet and a resin adhesion amount of 115 g / m ^{2 on} the palm part, with a coating material applied on one side. In addition, the coating material has good adhesiveness and excellent grip (non-slip) properties, so it was suitable as a highly safe work glove for use in painting work for automobiles and aluminum building materials.

[Comparative Example 1]
A glove was produced in the same manner as in Example 1 except that the crimped yarn processing method described later was used.

Using the same PPTA filament yarn as in Example 1, an S twist was added to this yarn with a double twister that is a twisting step, and a twisted yarn of t: 1170 (times / m) was obtained. The twist coefficient (K ₁ ) at this time is 7760, which is calculated by the following formula.

K ₁ = t × D ^1/2
[However, t represents the number of twists in the twisting process (times / m), and D represents the fineness (tex). ]

  The obtained twisted yarn was put into a saturated steam treatment facility that is a wet heat treatment step, and subjected to a saturated steam treatment (wet heat) at 200 ° C. for 15 minutes to perform a twist stop set. After cooling, reverse twisting was performed with a double twister as an untwisting step to untwist the number of twists to almost 0, and a crimped yarn of PPTA filament yarn having a strength retention of 36% was obtained. Table 1 shows the crimp characteristics of the obtained crimped yarn.

The glove thus obtained had a weight of 18 g / sheet, a palm weight of 340 g / m ² , had excellent combustion resistance and heat resistance, and was difficult to cut with a blade (cutting force: 6.0 N). However, it lacked softness, volume feeling and stretchability and was inferior in wearing feeling.

Further, the glove obtained by coating in the same manner as in Example 1 is a back-glove having a weight of 23 g / sheet, a palm resin adhesion amount of 130 g / m ² and a coating material applied to one side. The adhesiveness of the material was poor, and the coating material was easy to peel off.

[Example 3]
Using the same total fineness as used in Example 1, 440 dtex, single fiber fineness 1.7 dtex, 134 filaments, tensile strength 2.03 N / tex, moisture content 7% PPTA filament yarn, false twisting temperature A continuous false twisting process was performed under the same processing conditions as in Example 1 except that (dry heat) was set to 470 ° C. to obtain a crimped yarn of a PPTA filament. Table 1 shows the crimp characteristics of the obtained crimped yarn.

The obtained gloves have a weight of 18 g / sheet and a palm weight of 356 g / m ² , have a soft and voluminous texture, are highly stretchable, have a good fit, and are resistant to combustion and heat. It was excellent and difficult to cut with a blade (cutting force: 6.4 N).

Further, by the same method as in Example 1, a backside glove having a weight of 21.5 g / sheet and a resin adhesion amount of a palm portion of 110 g / m ² and having a coating material attached on one side was produced. The obtained glove had good adhesion to the coating material and excellent grip (non-slip) properties. Therefore, the glove was suitable as a highly safe work glove used for painting work for automobiles and aluminum building materials.

[Comparative Example 2]
Using the same total fineness as used in Example 1, 440 dtex, single fiber fineness 1.7 dtex, 134 filaments, tensile strength 2.03 N / tex, moisture content 7% PPTA filament yarn, false twisting temperature A normal false twisting process was performed under the same processing conditions as in Example 1 except that (dry heat) was set to 350 ° C. to obtain a crimped yarn of a PPTA filament. Table 1 shows the crimp characteristics of the obtained crimped yarn.

The obtained glove had a weight of 17.5 g / sheet and a palm weight of 340 g / m ² , and was excellent in combustion resistance and heat resistance, but was easily cut with a blade (cutting force: 5 .2N), soft and voluminous texture and lack of elasticity and poor wearing feeling.

A glove obtained by coating in the same manner as in Example 1 is a back-glove having a weight of 21 g / sheet and a resin adhesion amount of 130 g / m ^{2 on} the palm part, with a coating material applied to one side. The adhesiveness of the material was poor, and the coating material was easy to peel off.

  The composition of the coated yarn and the evaluation results of the glove characteristics are summarized in Table 2.

  The above-described Examples 1 to 3 are examples particularly related to the knitted layer 107 of the present glove. Next, Example 4 is demonstrated as an Example which concerns on implementation of the whole glove.

[Example 4]
3 shows the glove 101 according to the present application, FIG. 3 (a) is a view from the palm side, and FIG. 3 (b) is a view from the back side of the hand. Moreover, FIG.3 (c) is CC sectional drawing of Fig.3 (a).
The glove 101 according to the present invention consists of three layers. That is, a glove-shaped first layer 103 formed of rubber or a resin material, a second layer 105 made of rubber or a resin material on the outside of the first layer 103, a first layer 103, and a second layer 105 It is a knitted layer 107 that is disposed between and knitted to form a glove shape. Note that the first layer 103 and the second layer 105 are formed of an insulating material.
The knitted layer 107 is composed of 3, a core yarn 1 and a sheath yarn 2. The sheath yarn 2 is made of a high strength fiber having a tensile strength measured according to JIS L 1013 8.5 as 1.75 N / tex or more as a characteristic of the raw yarn. The knitted layer 107 is formed by knitting the covering yarn A in a state where the sheath yarn 2 is wound around the core yarn. The sheath yarn 2 is a crimped yarn that simultaneously satisfies the conditions that the bulk height is 40 cm ³ / g or more, the bulky compression elastic modulus is 80% or more, and the stretch / extension rate is 20% or more.
That is, the coated yarn A described in FIGS. 1 and 2 is used.

By comprising as mentioned above, the coating material of rubber | gum or resin and a fiber layer can be adhere | attached favorably. Moreover, since it is a glove that fits a hand while ensuring cut resistance, particularly precise work can be efficiently performed.
In addition, since the covering yarn A is provided on the outer side of the first layer 103, it is possible to provide a glove that does not give the user a discomfort due to the presence of the covering yarn A. That is, if the coated yarn A (including the case of Example 1) is present on the side on which the user's hand abuts or in the first layer 103, the user may experience discomfort due to the presence of the coated yarn A. Since it is configured as in the present embodiment, this can be reduced.
In addition, since the insulating first layer 103 and the second layer 105 are provided, the insulating function can be more reliably exhibited.
In addition, since the knitted layer 107, that is, the covering yarn A is present, in addition to the insulating function, high cut resistance can be exhibited.

As a method for forming these three layers, first, a hand mold such as a metal is immersed in natural rubber latex and pulled up. A glove-shaped knitted layer 107 knitted separately is placed on the first layer 103, which is a rubber film formed on the mold surface. In this state, the second layer 105 is coated on the outermost layer by immersing it again in the natural rubber latex and pulling it up. After all three layers are formed, the first layer 103 and the second layer 105 can be vulcanized at the same time and dried.
Thus, since it formed, the position of the knitting layer 107 can be set to arbitrary positions rather than the method of Example 1, for example. That is, if the thickness of the first layer 103 is determined, the knitting layer 107 is positioned outside the first layer 103, so that the knitting layer 107 can be reliably prevented from coming into contact with the user's hand. This is because when the knitting layer 107 comes into contact with the user, the user feels uncomfortable, and even if the knitting layer 107 does not directly contact, the user feels uncomfortable if the first layer 103 is too thin.
In this embodiment, in the case of Example 1, the user's feeling of use can be improved by reliably preventing the knitting layer 107 (coating yarn A) from coming into contact with the user. Furthermore, the first layer 103 can be formed to a thickness that does not make the user feel uncomfortable, thereby improving the user's feeling of use.
In addition, the knitting layer 107 can be reliably positioned between the first layer 103 and the second layer 105.

The above-mentioned structure can take a uniform structure over the entire glove, but preferably the knitted layer 107 has a knitted density of the coated yarn, and other parts that are likely to come into contact with the blade during the work. Form higher than the part. As an example of a portion where the knitting density of the covering yarn is high, a fingertip portion or the like can be considered. Depending on the use of the glove 101, it may be a portion between the thumb and forefinger or a range from the upper back of the hand to the base of the four fingers.
Further, when the knitting layer 107 is put on the first layer 103, it is possible to obtain the same effect by partially gathering the knitting layer 107 in the above-described range or the like.
By comprising in this way, cutting resistance can be partially improved, maintaining the softness | flexibility and fitting property of the whole glove.

In addition, it is preferable that the color of the knitting layer 107 is different from the color of the second layer 105. In this case, the wear state of the second layer 105 that is most likely to be worn can be known at a glance. That is, when the second layer 105 is worn and thinned, the color of the knitting layer 107 can be seen through, or if there is a small cut portion, the three colors of the knitting layer 107 can be seen as they are. Therefore, the user can find out that the gloves 101 are broken at an earlier stage. Furthermore, the color of the first layer 103 may be different from the colors of the second layer 105 and the knitting layer 107.
As a result, the user can quickly detect that the glove 101 has a poor cutting ability or an insulating property.

  The glove 101 of the present invention is useful as a work glove in the fishery, agriculture, food industry, medical, electric power, communication, railway and automobile fields, or as a sports glove. However, the glove 101 of the present invention can be used for any application as long as it is an application that requires at least one of cutting resistance and insulation, not to limit the use method. .

A: Coated yarn 1: Core yarn 2: Sheath yarn 3: Rolling yarn feeding roller 4: Feed roller 5: Lower spindle 6: Lower belt 7: Upper spindle 8: Upper belt 9: H bobbin 10: Snell guide 11: Delivery Roller 12: Guide bar 13: Take-up roller 14: Cheese 101: Gloves 103: First layer 105: Second layer 107: Knitting layer

Claims (16)

A glove-shaped first layer formed of rubber or resin material;
A glove-shaped second layer disposed on the outside of the first layer; and
A knitted layer disposed between the first layer and the second layer and knitted so as to have a glove shape;
The second layer is formed of rubber or resin material,
The knitting layer is
Core yarn,
As a characteristic of the raw yarn, it has a sheath yarn made of high strength fibers having a tensile strength measured according to JIS L 1013 8.5 of 1.75 N / tex or more,
The knitted layer is knitted using a coated yarn in which the sheath yarn is wound around the core yarn and at least heat-treated.
The sheath yarn is
The bulk height measured according to JIS L 1013 8.16 A method is 40 cm ³ / g or more, the bulk high compression modulus measured according to JIS L 1013 8.16 A method is 80% or more, and JIS L 1013 8.11 according to method a measured stretching elongation of 20% or more, the condition fulfills simultaneously,
When subjected to warm water treatment of 90 ° C. 20 minutes as a pre-Symbol heat treatment, the bulk altitude values glove wherein a higher due crimped yarn 5% or more compared to the previous value subjected to hot water treatment. The glove according to claim 1, wherein a bulk height of the sheath yarn is 40 to 80 cm ³ / g. The glove according to claim 1 or 2, wherein the bulky compression elastic modulus of the sheath yarn is 80 to 95%. The glove according to any one of claims 1 to 3, wherein the expansion / contraction elongation rate of the sheath yarn is 20 to 70%. The glove according to any one of claims 1 to 4, wherein a strength retention of the crimped yarn is 25% or more. The glove according to any one of claims 1 to 5, wherein the sheath yarn is a crimped yarn of para-aramid fiber. The glove according to any one of claims 1 to 6, wherein the core yarn is an elastic fiber. The coated yarn has a draft ratio of the core yarn of 1.5 to 5.0, and a twisting coefficient (K ₂ ) of the covering of the sheath yarn is 500 to 5,000. The listed gloves.
K ₂ = T × D ^1/2
(T represents the number of twists (times / m) of the cover ring, and D represents the fineness (tex).) The glove according to any one of claims 1 to 8, wherein the second layer is natural rubber latex. The knitting layer is
The glove according to any one of claims 1 to 9, wherein a portion where the blade is likely to come into contact with the blade during the work is formed higher than the other portions. The glove according to claim 9, wherein the portion of the coated yarn having a high braid density is at least a fingertip portion. The glove according to any one of claims 1 to 11, wherein a color of the knitting layer is different from a color of the second layer. The glove according to any one of claims 1 to 12, wherein a color of the first layer is different from colors of the second layer and the knitting layer. A method for manufacturing gloves,
The gloves are
A glove-shaped first layer formed of rubber or resin material;
A glove-shaped second layer disposed on the outside of the first layer; and
A knitted layer disposed between the first layer and the second layer and knitted to form a glove,
The second layer is formed of rubber or resin material,
The knitting layer is
Core yarn,
As a characteristic of the raw yarn, it has a sheath yarn made of high strength fibers having a tensile strength measured according to JIS L 1013 8.5 of 1.75 N / tex or more,
The knitted layer is knitted using a coated yarn in which the sheath yarn is wound around the core yarn and at least heat-treated.
The sheath yarn is
The bulk height measured according to JIS L 1013 8.16 A method is 40 cm ³ / g or more, the bulk high compression modulus measured according to JIS L 1013 8.16 A method is 80% or more, and JIS L 1013 8.11 according to method a measured stretching elongation of 20% or more, the condition fulfills simultaneously,
When subjected to warm water treatment of 90 ° C. 20 minutes as a pre-Symbol heat treatment method of the glove the umbrella elevation value is higher due crimped yarn 5% or more compared to the previous value subjected to the hot water treatment. The sheath yarn is a crimped yarn of para-aramid fiber, and after twisting high-strength fiber, heat setting is performed by dry heat treatment at a heater temperature of 470 to 550 ° C., and then the twisted yarn The method for producing a glove according to claim 14, wherein the glove is obtained by untwisting. The method for manufacturing a glove according to claim 14 or 15, wherein the second layer is a natural rubber latex formed by a dipping method.

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