Gloves and manufacturing method thereof

Abstract

To provide a glove in which a glove body and coating are difficult to be peeled off even if load, especially torsional load is applied.SOLUTION: A glove according to one aspect of the present invention includes: a fiber glove body; coating which covers at least a part of an outer face of the glove body and is mainly constituted of rubber or resin; and an adhesive part for bonding the glove body and the coating. The adhesive part includes: an adhesive layer in contact with the coating; and a bonded layer which is in contact with the glove body and is constituted of hot melt adhesive.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to gloves and methods for manufacturing gloves. [Background technology]

[0002] For example, gloves used in industrial environments such as civil engineering work or in cold climates are known that include a fiber glove body and a coating that covers the outer surface of the glove body and is mainly made of rubber or resin.

[0003] The glove can be manufactured by, for example, bonding the glove body and the coating with an adhesive (see JP 2008-514467 A). According to the publication, since the glove body and the coating have different stretch characteristics, a non-tacky adhesive is formed to support the coating on the glove body, and by restricting the stretchability, peeling between the adhesive layer and the coating and / or the glove body is prevented. Specifically, the publication describes an adhesive that crosslinks when exposed to moisture, and is recommended to be polyurethane containing isocyanate. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 2008-514467 Summary of the Invention [Problem to be solved by the invention]

[0005] However, because gloves move in a complex manner in response to the movement of the user's hand, even conventional gloves using the above adhesives are prone to peeling between the glove body and the coating when subjected to load, especially torsional load. Therefore, there is a demand for gloves that are even less susceptible to peeling.

[0006] The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a glove in which the glove body and the coating are unlikely to separate even when a load, particularly a torsional load, is applied, and a method for manufacturing such a glove. [Means for solving the problem]

[0007] A glove according to one aspect of the present invention comprises a fiber glove body, a coating primarily composed of rubber or resin and covering at least a part of the outer surface of the glove body, and an adhesive part bonding the glove body and the coating, the adhesive part having a pressure-sensitive adhesive layer in contact with the coating, and an adhesive layer in contact with the glove body and made of a hot melt adhesive.

[0008] The adhesive layer adheres the adhesive portion to the coating. The adhesive layer has high adhesive strength to the coating and re-adheres even if peeled off, making it easy to maintain adhesion between the coating and the adhesive portion. On the other hand, the glove is adhered to the glove body, which is difficult to adhere to with an adhesive, using a hot melt adhesive, thereby increasing the adhesive strength between the glove body and the adhesive portion. Therefore, the glove is unlikely to peel off from the glove body and the coating even when a load, particularly a torsional load, is applied.

[0009] Preferably, the adhesive portion does not include any other layer between the pressure-sensitive adhesive layer and the adhesive layer. By not including any other layer between the pressure-sensitive adhesive layer and the adhesive layer in the adhesive portion, the flexibility of the glove can be increased while maintaining the adhesive strength. In addition, the conformability of the glove is improved, and the glove becomes more resistant to torsional load.

[0010] The average thickness of the pressure-sensitive adhesive layer is preferably 20 μm or more and 200 μm or less, and the average thickness of the adhesive layer is preferably 20 μm or more and 200 μm or less. By setting the average thickness of the pressure-sensitive adhesive layer within the above ranges and the average thickness of the adhesive layer within the above ranges, the adhesive strength can be increased while maintaining the flexibility of the glove.

[0011] The ratio of the average thickness of the pressure-sensitive adhesive layer to the average thickness of the adhesive layer is preferably 0.3 or more and 1.5 or less. By setting the ratio of the average thicknesses within the above range, the flexibility of the glove can be increased.

[0012] The pressure-sensitive adhesive layer preferably contains a coating component that forms the rubber or resin that is the main component of the coating, and the content of the coating component in the pressure-sensitive adhesive layer is preferably 10% by mass or more and 60% by mass or less. By containing the same component as the main component of the coating in the pressure-sensitive adhesive layer within the above range, the adhesive strength with the coating can be increased. Note that the "coating component that forms the rubber" includes not only the polymerized rubber itself, but also the rubber monomer before polymerization, or a mixture of both. The same applies to the "coating component that forms the resin."

[0013] According to another aspect of the present invention, there is provided a method for manufacturing a glove comprising a fiber glove body, a coating mainly composed of rubber or resin and covering at least a part of the outer surface of the glove body, and an adhesive portion for bonding the glove body and the coating, the method comprising the steps of: an adhesive coating and drying step of coating an inner surface of the coating with an adhesive composition and drying the coating; an adhesive coating and heating step of coating and heating a hot melt adhesive on a surface of the adhesive layer formed in the adhesive coating and drying step; an overlapping step of overlapping the coating and the glove body after the adhesive coating and heating step; and an adhering step of adhering the coating and the glove body by heating after the overlapping step.

[0014] In this method, the hot melt adhesive is used to bond the glove body, which is difficult to bond with a pressure sensitive adhesive, and therefore the adhesive strength between the glove body and the adhesive layer is increased. Therefore, the glove manufactured by this method is difficult to peel off even when a load, especially a torsional load, is applied.

[0015] Here, the term "major component" refers to the component with the highest content, e.g., a component with a content of 50% by mass or more. The term "average thickness" refers to the arithmetic mean of thicknesses measured at 20 points over a 2 mm width at 100 μm intervals using a digital microscope (e.g., Keyence Corporation's "VHX-6000"), after observing the cross section of a test piece cut from the area containing the measurement target at 100x magnification. If the measurement target for "average thickness" is located on a smooth portion of the glove approximately 50 mm from the bottom edge of the hem toward the fingertip, the test piece is preferably cut from this smooth portion.

[0016] "Adhesive" is a material that does not contain any crosslinking agent or contains only a small amount of crosslinking agent, retains tackiness (stickiness of the adhesive surface) even after a long time, and is gum-like at room temperature (e.g., 25°C), i.e., is in a state intermediate between solid and liquid, and has the property of adhering to an object when pressure is applied. Generally, adhesives have a complex tensile modulus E at 25°C. * (1Hz)<10 7 dyne / cm 2 Meet the following. [Effects of the Invention]

[0017] As described above, in the glove of the present invention, the glove body and the coating are unlikely to separate even when a load, particularly a torsional load, is applied. Furthermore, the manufacturing method of the glove of the present invention can manufacture a glove in which the glove body and the coating are unlikely to separate even when a load, particularly a torsional load, is applied. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a schematic front view of a glove according to one embodiment of the present invention, viewed from the palm side. [Figure 2] FIG. 2 is a schematic cross-sectional view of a portion of the glove of FIG. 1 having a coating. [Figure 3] FIG. 3 is a flow diagram showing a method for manufacturing a glove according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] A glove and a method for manufacturing the glove according to one embodiment of the present invention will be described in detail below.

[0020] 〔gloves〕 The glove 1 shown in Figures 1 and 2 comprises a fiber glove body 10, a coating 20 containing rubber or resin as its main component and covering at least a portion of the outer surface of the glove body 10, and an adhesive part 30 that bonds the glove body 10 and the coating 20 together.

[0021] The glove body 10 and the coating 20 each have a bag-shaped main body portion 1a that covers the palm and back of the hand of a wearer, cylindrical bottomed first to fifth finger portions 1b that extend from the main body portion 1a to cover the wearer's first to fifth fingers, respectively, and a cylindrical skirt portion 1c that extends in the opposite direction from the first to fifth finger portions 1b. In other words, in the glove 1 shown in FIGS. 1 and 2, the glove body 10 and the coating 20 have substantially the same shape. As shown in FIG. 2, the adhesive portion 30 is preferably provided over the entire area where the glove body 10 and the coating 20 face each other. However, this is not essential, and a configuration in which the adhesive portion 30 is not provided in a portion of the area where the glove body 10 and the coating 20 face each other may be adopted.

[0022] <Glove body> The yarns constituting the glove body 10 include cotton yarn, acrylic yarn, nylon yarn, polyester yarn, rayon yarn, ultra-high molecular weight polyethylene yarn (HPPE), metal fiber yarn, glass fiber yarn, conductive fiber yarn, and composite yarns thereof. The yarns may be in the form of spun yarn, straight or crimped filament yarn, covered yarn, or fancy twisted yarn. The thickness of the yarns (in the case of composite yarns, the thickness of all the combined yarns) may be between 50 dtex and 1500 dtex.

[0023] The knitting method of the glove body 10 is not particularly limited, and the glove body 10 can be knitted into a glove shape by terry knitting, seamless knitting, or sewing fabric such as nonwoven fabric.

[0024] <Coating> As described above, the coating 20 is primarily composed of rubber or resin. Examples of the rubber include natural rubber (NR) and synthetic rubber. Examples of the synthetic rubber include nitrile butadiene rubber (NBR), chloroprene rubber (CR), styrene butadiene rubber (SBR), isoprene rubber (IR), butyl rubber (IIR), and modified versions of these. Examples of the resin include vinyl chloride resin, polyurethane, acrylic resin, and modified versions of these. One or more of the rubbers or resins may be used.

[0025] Rubber is preferred, and natural rubber and nitrile butadiene rubber are more preferred, as the main component of the coating 20. By using natural rubber or nitrile butadiene rubber as the main component of the coating 20 in this way, the balance between the strength, flexibility, and production costs of the coating 20 can be optimized.

[0026] The coating 20 may contain various additives such as vulcanizing agents, crosslinking agents, pigments, waxes, thickeners, etc., as needed.

[0027] The lower limit of the average thickness of the coating 20 is preferably 0.1 mm, more preferably 0.15 mm. On the other hand, the upper limit of the average thickness of the coating 20 is preferably 0.7 mm, more preferably 0.6 mm, and even more preferably 0.5 mm. If the average thickness of the coating 20 is less than the lower limit, the abrasion resistance of the coating 20 may decrease. Conversely, if the average thickness of the coating 20 exceeds the upper limit, the flexibility of the glove 1 may be insufficient.

[0028] <Adhesive part> As shown in Figure 2, the adhesive portion 30 has a pressure-sensitive adhesive layer 31 in contact with the coating 20, and an adhesive layer 32 in contact with the glove body 10 and made of a hot melt adhesive. In the glove 1, the adhesive portion 30 is made of two layers, the pressure-sensitive adhesive layer 31 and the adhesive layer 32, and the adhesive portion 30 does not include any other layer between the pressure-sensitive adhesive layer 31 and the adhesive layer 32. By not including any other layer between the pressure-sensitive adhesive layer 31 and the adhesive layer 32 of the adhesive portion 30, the flexibility of the glove 1 can be increased while maintaining the adhesive strength. In addition, the conformability of the glove 1 is improved, making it more resistant to torsional loads.

[0029] The adhesive portion 30 can be provided in the entire opposing region where the glove body 10 and the coating 20 face each other, or it can be provided in a portion of the opposing region. When provided in a portion of the opposing region, it is recommended to provide it at least in the fingertip region on the palm side of the first to fifth fingers, the boundary region between the palm and the first to fifth fingers, and the palm region. By adhering these regions, it is possible to effectively prevent misalignment between the glove body 10 and the coating 20. In particular, providing the adhesive portion 30 at the base of the fingers included in the boundary region between the palm and the first to fifth fingers is effective in preventing the above-mentioned misalignment.

[0030] (Adhesive layer) Examples of adhesives that can be used to form the adhesive layer 31 include natural rubber (e.g., depolymerized natural rubber), polyurethane, silicone, and poly(meth)acrylic acid ester. Among these, poly(meth)acrylic acid ester is preferred because of its excellent durability. The adhesive may contain a thickener, an antioxidant, a stabilizer, a surfactant, a pigment, and the like, as needed.

[0031] To increase the adhesive strength between the coating 20 and the adhesive layer 31, rubber or resin may be mixed into the adhesive layer 31. The rubber or resin to be mixed is not limited as long as it can increase adhesive strength, and examples include natural rubber, synthetic rubber, vinyl chloride resin, polyurethane, and acrylic resin. One index for determining the adhesive strength between the coating 20 and the adhesive layer 31 is, for example, the solubility parameter. It is preferable to select the rubber or resin to be mixed so that the solubility parameters are close to each other. Specifically, if the main component of the coating 20 is rubber, it is preferable to include the same rubber component as the coating 20. For example, if the rubber component of the coating 20 is NR, the adhesive may include a depolymerized NR component and a highly adhesive acrylic (poly(meth)acrylic acid ester), and the mass ratio of the NR component to the highly adhesive acrylic may be 15:85 or more and 25:75 or less. On the other hand, as long as the solubility parameter of the adhesive layer 31 is close to that of the coating 20, it may contain a component different from that of the coating 20, or it may not contain anything at all. For example, if the rubber component of the coating 20 is NBR, high adhesive strength can be obtained even if the adhesive layer 31 does not contain the component of the coating 20 (NBR), that is, even if it contains only highly adhesive acrylic. The solubility parameter of each material (rubber or resin) can be determined, for example, from "New Edition: Fundamentals of Rubber Technology" (The Society of Rubber Industry, Japan).

[0032] When the pressure-sensitive adhesive layer 31 contains the rubber component, the lower limit of the content of the rubber component in the pressure-sensitive adhesive layer 31 (solid content) is preferably 10% by mass, more preferably 20% by mass. On the other hand, the upper limit of the content of the rubber component is preferably 60% by mass, more preferably 50% by mass. By containing the same component as the main component of the coating 20 in the pressure-sensitive adhesive layer 31 within the above range, the adhesive strength with the coating 20 can be increased. If the content of the rubber component is below the above lower limit, the adhesive strength improvement effect may be insufficient. Conversely, if the content of the rubber component exceeds the above upper limit, the adhesive strength with the adhesive layer 32 may decrease, and peeling may easily occur between the pressure-sensitive adhesive layer 31 and the adhesive layer 32.

[0033] When the main component of the coating 20 is a resin, the pressure-sensitive adhesive layer 31 can contain a component of the same resin as the main component of the coating 20. In other words, the pressure-sensitive adhesive layer 31 can contain a coating component that forms the resin that is the main component of the coating 20. The content of the coating component in the pressure-sensitive adhesive layer 31 is preferably 10% by mass or more and 60% by mass or less. By thus containing the same component as the main component of the coating 20 in the pressure-sensitive adhesive layer 31 within the above range, the adhesive strength with the coating 20 can be increased.

[0034] The lower limit of the average thickness of the adhesive layer 31 is preferably 20 μm, more preferably 25 μm. On the other hand, the upper limit of the average thickness of the adhesive layer 31 is preferably 200 μm, more preferably 100 μm. If the average thickness of the adhesive layer 31 is less than the above lower limit, the adhesive strength with the coating 20 may be insufficient. On the other hand, if the average thickness of the adhesive layer 31 exceeds the above upper limit, the adhesive has low thixotropy and therefore may easily sag during production of the glove 1, making production difficult.

[0035] The ratio of the average thickness of the pressure-sensitive adhesive layer 31 to the average thickness of the adhesive layer 32 is preferably 0.3, more preferably 0.4. On the other hand, the upper limit of the average thickness ratio is preferably 1.5, more preferably 1.2, and even more preferably 1.0. If the average thickness ratio is below the lower limit, the pressure-sensitive adhesive layer 31 may become too thin, which may result in insufficient adhesion between the pressure-sensitive adhesive layer 31 and the coating 20, or the adhesive layer 32 may become too thick, which may result in reduced flexibility of the glove 1. Conversely, if the average thickness ratio exceeds the upper limit, the pressure-sensitive adhesive layer 31 may become too thick, which may make it difficult to manufacture the glove 1, or the adhesive layer 32 may become too thin, which may result in insufficient adhesion between the adhesive layer 32 and the glove body 10.

[0036] (adhesive layer) The hot melt adhesive that constitutes the adhesive layer 32 has the property of being liquefied by heat exceeding the melting point before hardening, and solidifying when cooled.

[0037] The main components of the hot melt adhesive include modified polyethylene-vinyl acetate (EVA), copolymer polyester, modified polyolefin, polyurethane, styrene-butadiene rubber (SBS), polyamide, etc. Among them, modified EVA, copolymer polyester, modified polyolefin and polyurethane are preferred because they can easily ensure adhesive strength between the glove body 10 and the pressure-sensitive adhesive layer 31.

[0038] The lower limit of the melting point of the hot melt adhesive is preferably 60°C, more preferably 70°C. On the other hand, the upper limit of the melting point of the hot melt adhesive is preferably 140°C, more preferably 130°C. If the melting point of the hot melt adhesive is below the lower limit, the adhesive layer 32 may be prone to peeling in high-temperature environments during transportation of the gloves or when gripping a hot object. Conversely, if the melting point of the hot melt adhesive exceeds the upper limit, the temperature at which the adhesive liquefies during adhesion becomes high, which may cause deterioration of the coating 20.

[0039] The lower limit of the average thickness of the adhesive layer 32 is preferably 20 μm, more preferably 30 μm. On the other hand, the upper limit of the average thickness of the adhesive layer 32 is preferably 200 μm, more preferably 100 μm. If the average thickness of the adhesive layer 32 is less than the lower limit, the adhesive strength to the glove body 10 may be insufficient. Conversely, if the average thickness of the adhesive layer 32 exceeds the upper limit, the flexibility of the glove 1 may be reduced.

[0040] As shown in Figure 2, the adhesive layer 32 is impregnated into the glove body 10, but preferably does not penetrate to the inner surface of the glove body 10. By impregnating the glove body 10 with the adhesive layer 32 in this manner, the adhesive strength can be increased. On the other hand, by not allowing the adhesive layer 32 to penetrate to the inner surface of the glove body 10, a decrease in the wearing comfort of the glove 1 can be prevented. Note that when the adhesive layer 32 is impregnated into the glove body 10, the average thickness of the adhesive layer 32 also includes this impregnated portion.

[0041] <Advantages> In the glove 1, the adhesive portion 30 is adhered to the coating 20 by an adhesive layer 31. The adhesive layer 31 has high adhesive strength to the coating 20, and even if peeled off, it re-adheres, making it easy to maintain adhesion between the coating 20 and the adhesive portion 30. On the other hand, in the glove 1, the glove body 10, which is difficult to adhere to with an adhesive, is adhered to the adhesive portion 30 by a hot melt adhesive, so that the adhesive strength between the glove body 10 and the adhesive portion 30 can be increased. Therefore, in the glove 1, the glove body 10 and the coating 20 are unlikely to peel off even when a load, particularly a torsional load, is applied.

[0042] The present inventors have also found that the adhesive layer 32 has the effect of preventing twisting of the glove body 10. Furthermore, the present inventors speculate that the reason why the adhesive layer 31 has strong adhesive strength is that the adhesive layer 31 is present between the coating 20, which is a rubber layer or a resin layer, and the adhesive layer 32 and is not in contact with air, and therefore has the ability to prevent peeling due to van der Waals forces or atmospheric pressure.

[0043] [Glove manufacturing method] The glove manufacturing method shown in Fig. 3 is a method for manufacturing a glove 1 comprising a fiber glove body 10 shown in Fig. 1 and Fig. 2, a coating 20 mainly composed of rubber or resin and covering at least a part of the outer surface of the glove body 10, and an adhesive part 30 for bonding the glove body 10 and the coating 20. The glove manufacturing method includes an adhesive application and drying step S1, an adhesive application and heating step S2, an overlapping step S3, and an adhesion step S4.

[0044] <Adhesive coating and drying process> In the adhesive coating and drying step S1, an adhesive composition is coated and dried on the inner surface of the coating film 20. Specifically, the following procedure is followed. Note that although the following procedure describes the case where coating is performed by immersion, coating may also be performed by other methods.

[0045] First, the prepared coating 20 is turned inside out and placed on a hand mold with the inner surface facing outward. The coating 20 may be in a crosslinked or semi-crosslinked state. Immersing the semi-crosslinked coating 20 in an adhesive increases the adhesive strength between the adhesive layer 31 and the coating 20. Furthermore, when the coating 20 is in a crosslinked state, the coating 20 alone can be placed on another hand mold, such as a Teflon (registered trademark)-coated hand mold, with good slipperiness. The adhesive layer 31, hot-melt adhesive layer 32, and glove body 10 are then formed on the coating 20 in this order. The completed glove 1 is then slid from the fingertips upwards on the hand mold without being inverted from the bottom. After release, the glove 1 is then inverted. In this case, the completed glove 1 can be released from the hand mold without being inverted, making it possible to manufacture a glove with a thick glove body 10.

[0046] It is preferable to preheat the hand mold covered with the coating 20. Preheating in this manner promotes drying of the adhesive composition after immersion and prevents dripping of the adhesive composition. The lower limit of the preheating temperature of the hand mold is preferably 20°C, more preferably 25°C. On the other hand, the upper limit of the preheating temperature of the hand mold is preferably 70°C, more preferably 60°C. If the preheating temperature of the hand mold is below the lower limit, the effect of promoting drying of the adhesive composition may not be sufficiently achieved. Conversely, if the preheating temperature of the hand mold exceeds the upper limit, the adhesive composition may be repelled by the coating 20 when immersed in the adhesive composition, making it difficult to form the adhesive layer 31.

[0047] Next, the hand mold is immersed in an adhesive composition, which is a solution in which the solid content necessary for forming the adhesive layer 31 is diluted with water.

[0048] The lower limit of the solid content in the pressure-sensitive adhesive composition is preferably 20% by mass, more preferably 25% by mass. On the other hand, the upper limit of the solid content is preferably 60% by mass, more preferably 50% by mass. If the solid content is less than the lower limit, the amount of the pressure-sensitive adhesive component may be insufficient, resulting in a decrease in adhesive strength. Conversely, if the solid content exceeds the upper limit, the flexibility of the glove 1 may decrease.

[0049] The liquid temperature of the pressure-sensitive adhesive composition is preferably 20°C or higher and 45°C or lower. If the liquid temperature of the pressure-sensitive adhesive composition is lower than the lower limit, the pressure-sensitive adhesive composition may not be dried sufficiently. Conversely, if the liquid temperature of the pressure-sensitive adhesive composition exceeds the upper limit, the pressure-sensitive adhesive composition may deteriorate, and the pressure-sensitive adhesive layer 31 may not function sufficiently. The immersion time in the pressure-sensitive adhesive composition can be determined based on the desired adhesion amount of the pressure-sensitive adhesive composition, the desired thickness of the pressure-sensitive adhesive layer 31, etc.

[0050] After immersion, the pressure-sensitive adhesive composition is dried to evaporate the water. The drying conditions are not particularly limited as long as the water evaporates, but the drying temperature is preferably 25°C or higher and 90°C or lower, and the drying time is preferably 10 minutes or longer and 3 hours or shorter.

[0051] After the pressure-sensitive adhesive composition has dried, the hand mold is cooled. Cooling may be performed by natural cooling, air cooling, or water cooling. In the case of water cooling, excess water is removed by blowing it off or the like. The temperature of the hand mold after cooling is preferably 30°C or lower. By keeping the temperature of the hand mold after cooling below the upper limit mentioned above, excessive adhesion of the hot melt adhesive can be prevented in the adhesive application heating step S2.

[0052] <Adhesive coating and heating process> In the adhesive application and heating step S2, a hot melt adhesive is applied and heated to the surface of the adhesive layer 31 formed in the adhesive application and drying step S1. Specifically, the following procedure is followed. Note that in the following procedure, the application is performed by adhesion and then heated and melted, but the application may also be performed by immersion in a water-based adhesive, followed by drying and heating.

[0053] In the adhesive application and heating step S2, first, a hot melt adhesive is applied to the surface of the adhesive layer 31 formed in the adhesive application and drying step S1.

[0054] Methods for applying the hot melt adhesive include fluidized bed dipping, spray coating, melt dipping, etc. Among these, fluidized bed dipping or spray coating is preferred, as it is easy to control the adhesive layer 32 uniformly.

[0055] In the fluidized bed dipping, the hot melt powder is applied uniformly and thinly to the surface of the adhesive layer 31. At this time, excess powder adhering to the surface of the hand mold or the surface of the adhesive layer 31 is removed to achieve uniformity.

[0056] In the spray coating, the hot melt powder is sprayed thinly and uniformly onto the surface of the adhesive layer 31. At this time, excess powder adhering to the surface of the hand mold or the surface of the adhesive layer 31 is removed to achieve a uniform coating.

[0057] The lower limit of the particle size D90 at which the cumulative mass of the powder accounts for 90% is preferably 40 μm, more preferably 50 μm. On the other hand, the upper limit of the particle size D90 is preferably 200 μm, more preferably 180 μm. If the particle size D90 is below the lower limit, the adhesive strength of the adhesive layer 32 may be insufficient. Conversely, if the particle size D90 exceeds the upper limit, the adhesive layer 32 may be too thick, and the glove 1 produced may lack flexibility.

[0058] Next, the hot melt adhesive is heated and melted.

[0059] Specifically, the powder is melted to form adhesive layer 32 on the surface of pressure-sensitive adhesive layer 31. The heating temperature at this time is set to be equal to or higher than the melting temperature of the powder, but is preferably set to 140°C or lower to avoid deterioration of coating 20. The heating time is set to be a time sufficient to form adhesive layer 32, and can be, for example, 10 minutes to 60 minutes.

[0060] The hand mold is then cooled. Cooling may be performed by natural cooling, air cooling, or water cooling. The temperature of the hand mold after cooling is preferably 30°C or less. Lowering the temperature of the adhesive layer 32 makes the surface of the adhesive layer 32 more slippery, making it easier to stack the glove body 10. From the viewpoint of productivity, the time required for cooling is preferably 3 minutes or more and 40 minutes or less. This forms the adhesive portion 30 in which the pressure-sensitive adhesive layer 31 and the adhesive layer 32 are laminated.

[0061] <Layering process> In the overlapping step S3, the coating film 20 and the glove body 10 are overlapped after the adhesive application and heating step S2.

[0062] Specifically, the glove body 10 is turned inside out, with the inner surface facing outward, and placed over the hand-shaped coating 20 via the adhesive portion 30. At this time, it is recommended to adjust the position and perform leaching of the adhesive layer 31 by rinsing with water. Wetting the glove body 10 with water improves the slipperiness between the glove body 10 and the coating 20, and between the glove body 10 and the adhesive portion 30, making it easier to adjust the position.

[0063] Thereafter, the glove is washed in hot water. This hot water wash shrinks the glove body 10, making it easier to fit. The hot water wash also serves as leaching of the glove body 10. The hot water wash conditions can be, for example, 60°C to 90°C and 15 seconds to 25 seconds.

[0064] <Adhesion process> In the bonding step S4, after the overlapping step S3, the coating 20 and the glove body 10 are bonded by heating. This heating re-liquefies the hot melt adhesive, bonding between the glove body 10 and the adhesive layer 31. Furthermore, leaching in the overlapping step S3 evaporates the moisture contained in the glove body 10, etc.

[0065] The heating temperature is set to a temperature equal to or higher than the melting point of the hot melt adhesive. To avoid deterioration of the coating 20, the upper limit of the heating temperature is preferably 140°C, more preferably 130°C. The heating time is preferably 15 minutes or more and 60 minutes or less. If the heating time is less than the lower limit, the adhesion between the coating 20 and the glove body 10 may be insufficient. Conversely, if the heating time exceeds the upper limit, the coating 20 may be deteriorated. Furthermore, the hot melt adhesive may penetrate to the inner surface of the glove body 10, which may reduce the wearing comfort of the glove 1.

[0066] After heating, the hot melt adhesive is allowed to solidify sufficiently, and then the glove 1 is inverted and released from the hand mold. If necessary, the hem 1c is cut and bias tape is sewn. In this manner, the glove 1 can be manufactured.

[0067] <Advantages> In this glove manufacturing method, the glove body 10, which is difficult to bond with an adhesive, is bonded using a hot melt adhesive, thereby increasing the adhesive strength between the glove body 10 and the adhesive layer 32. Therefore, the glove 1 manufactured by this glove manufacturing method is difficult to peel off even when a load, especially a torsional load, is applied.

[0068] [Other embodiments] The present invention is not limited to the above-described embodiment, and can be implemented in various other forms, including those described above, with various modifications and improvements.

[0069] In the above embodiment, the adhesive portion of the glove is configured with two layers, a pressure-sensitive adhesive layer and an adhesive layer, but another layer may be provided between the pressure-sensitive adhesive layer and the adhesive layer.

[0070] In the above embodiment, the glove body and the coating are both formed in a bag-like shape to cover the palm and the back of the hand of the wearer. However, the coating does not have to be formed in a bag-like shape as long as it covers at least a portion of the outer surface of the glove body. [Example]

[0071] The present invention will be described in more detail below with reference to examples and comparative examples, but the present invention is not limited to the following examples.

[0072] [No.1] The glove body was knitted using woolly nylon 210 dtex. The coating was made using the NR rubber latex compound having the compounding amount (solid content) shown in Table 1.

[0073] [Table 1]

[0074] Using the glove body and the coating, glove No. 1 was produced according to the glove manufacturing method described above.

[0075] The adhesive used was "NF13" manufactured by Musashino Chemical Co., Ltd. (mass ratio: poly(meth)acrylic acid ester: depolymerized NR = 80:20), and the hot melt adhesive used was "PR D60C-P" manufactured by Toyo Ink Co., Ltd. (main component: EVA, melting point: 100°C, particle size D90: 63 μm). The adhesive layer had an average thickness of 33 μm, and the adhesive layer had an average thickness of 63 μm.

[0076] [No.2] Glove No. 2 was produced in the same manner as glove No. 1, except that the adhesive part was only the adhesive layer. The average thickness of the adhesive layer was set to 90 μm, which was the same as the average thickness of the entire adhesive part of glove No. 1.

[0077] [No.3] Glove No. 3 was produced in the same manner as glove No. 1, except that the adhesive layer was the only adhesive layer. The average thickness of the adhesive layer was set to 92 μm, which was the same as the average thickness of the entire adhesive layer of glove No. 1.

[0078] [No.4] A commercially available glove was prepared as No. 4. The glove body was knitted using woolly nylon 210 dtex, and the coating was made using a rubber latex compound with the blending amounts shown in Table 1. The adhesive portion consisted of an adhesive and NaCl, of which the NaCl dissolved and disappeared during leaching. In other words, the adhesive portion of No. 4 consisted only of the adhesive. The adhesive used in the adhesive layer was "NF13" manufactured by Musashino Chemical Co., Ltd., and the average thickness of the adhesive layer was 70 μm.

[0079] [No.5] Glove No. 5 was produced in the same manner as No. 1, except that the adhesive layer was made of 100% poly(meth)acrylic acid ester "AC100".

[0080] [No.6] A coating was formed on a glove body 10 similar to that of No. 1 using an NBR rubber latex compound having the compounding amount (solid content) shown in Table 2.

[0081] [Table 2]

[0082] Glove No. 6 was prepared in the same manner as No. 5 except that the above coating was used.

[0083] [evaluation] The torsion test and peel test were carried out on gloves No. 1 to No. 6 in two states: in their normal state and after immersion in water for 24 hours.

[0084] <Torsion test> The torsion test was performed as follows. A test specimen (fingertip portion, 18 mm diameter) including the adhesive portion was cut from each glove. The test specimen was placed in contact with waterproof sandpaper (#1000 sandpaper) (contact area 10 mm diameter) and a 5 kg load was applied. In this state, the test specimen was twisted and rubbed against the glove. Specifically, the test specimen was rotated half a turn (180 degrees) in one direction, and then rotated half a turn in the opposite direction. The rotation speed was 40 Hz. Each half turn in one direction or the opposite direction was counted as one rotation, and the number of times that a portion of the coating of the test specimen peeled off from the glove body and lifted off was recorded. The results are shown in Table 3.

[0085] <Peel strength> Peel strength was determined by cutting a 10mm wide x 60mm long test piece from the bonded area between the glove body and the coating. A 180° peel test was performed using this test piece at a tensile speed of 50mm / min and a travel distance of 100mm. The peel strength was calculated by averaging the peaks and valleys of the load observed and dividing it by the average width of the bonded area. The "average width of the bonded area" refers to the average length of the bonded area across the width of the test piece. The results are shown in Table 3.

[0086] [Table 3]

[0087] In Table 3, "-" in the adhesive section means that the corresponding layer (adhesive layer or adhesive layer) is not included. The parentheses in the torsion test mean that the coating broke before separation between the coating and the glove body occurred. Also, "0 times" in the torsion test means that separation had already occurred before the test.

[0088] From the results in Table 3, it can be seen that by configuring the adhesive part to have a pressure-sensitive adhesive layer in contact with the coating and an adhesive layer in contact with the glove body and made of a hot melt adhesive (No. 1, No. 5, No. 6), it is possible to make gloves in which the glove body and the coating are less likely to peel off even when a load, especially a torsional load, is applied.

[0089] Furthermore, comparing gloves No. 1 and No. 5, in which the rubber component of the coating is NR, it can be seen that glove No. 1, in which the rubber component of the adhesive contains NR, is more resistant to peeling of the glove body and coating, even when subjected to torsional load, especially after water immersion. On the other hand, when the rubber component of the adhesive is NBR, it can be seen that high adhesive strength can be obtained even with an adhesive that is only made of strong adhesive acrylic. [Industrial Applicability]

[0090] As described above, the glove of the present invention is such that the glove body and the coating are not easily separated even when a load, particularly a torsional load, is applied. Furthermore, the manufacturing method of the glove of the present invention can manufacture a glove which is not easily separated even when a load, particularly a torsional load, is applied. [Explanation of symbols]

[0091] 1 glove 1a Main body 1b Finger section 1c hem 10 Glove body 20 Coating 30 Adhesive part 31 Adhesive layer 32 Adhesive layer

Claims

1. A fiber glove body, a coating that covers at least a part of the outer surface of the glove body and is mainly composed of rubber or resin; an adhesive portion for adhering the glove body and the coating; Equipped with The adhesive portion is a pressure-sensitive adhesive layer in contact with the coating; An adhesive layer made of a hot melt adhesive in contact with the glove body. and The average thickness of the pressure-sensitive adhesive layer is 20 μm or more and 100 μm or less, A glove wherein a ratio of an average thickness of the pressure-sensitive adhesive layer to an average thickness of the adhesive layer is 0.3 or more and 1.0 or less.

2. The glove according to claim 1, wherein the adhesive portion does not include any other layer between the pressure-sensitive adhesive layer and the adhesive layer.

3. A glove as described in claim 1 or claim 2, wherein the average thickness of the adhesive layer is 20 μm or more and 200 μm or less.

4. A method for manufacturing the glove according to claim 1, a pressure-sensitive adhesive coating and drying step of coating an inner surface of the coating with a pressure-sensitive adhesive composition and drying the composition; an adhesive coating and heating step of coating and heating a hot melt adhesive on the surface of the adhesive layer formed in the adhesive coating and drying step; a laminating step of laminating the coating film and the glove body after the adhesive coating and heating step; a bonding step of bonding the coating and the glove body by heating after the overlapping step; A method for manufacturing gloves comprising the steps of:

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