JP2015209602A - Ground woven fabric for adhesive tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ground woven fabric for adhesive tape which is cut easily with hand, whose cut end is neat, whose surface is smooth and whose appearance is good.SOLUTION: In a ground woven fabric for adhesive tape, at least one part of warp and weft is welded, the welding depends on melting of at least one component of the weft, and a cover factor of the warp is less than that of the weft. An adhesive tape, a surgical tape and a packing tape are made of the ground woven fabric for adhesive tape.

Description

  The present invention relates to a base fabric for an adhesive tape. More specifically, since the warp has an appropriate strength and flexibility and is appropriately fixed to the weft, the adhesive tape base has excellent hand cutting properties, a beautiful cut end, a smooth surface, and a good appearance. It relates to fabrics.

  Hand tearability is very important for adhesive tapes used for packaging, fixing, temporary fixing, etc., or surgical tapes used for medical purposes. Although rayon spun yarn and vinylon fiber have been used for a long time, polyethylene fiber and polyester fiber have come to be used due to problems of dimensional stability when wet and deterioration of strength. However, hand cutting is a problem, and polymer modification techniques for improving hand cutting characteristics, yarn processing techniques such as false twisting, and post-processing techniques for laminating a film or the like on a woven fabric are being studied.

  Polyester modification technology includes heat treatment of fabrics using warp yarns using false twisted yarns made of polyester polymers that have been modified to a low melting point with high shrinkage by copolymerizing isophthalic acid components having metal sulfonate groups. By doing so, a technique (Patent Documents 1 and 2) is known in which the strength of warp is reduced and excellent hand cutting properties are obtained when an adhesive tape is obtained.

  Also disclosed is a technology (Patent Document 3) that uses a woven fabric using copolyester multifilaments for warp to reduce the strength by heat during high-order processing and obtain excellent hand cutting properties when used as an adhesive tape. Has been. However, in these techniques, in order to solve the problem that the warp strength is all decreased due to heat during processing and the strength of the warp is not stable and the above-mentioned problems of the prior art, a low melting point component is arranged in a part of the warp, A technique (Patent Document 4) is disclosed in which at least one portion of the weft and the weft is fused to achieve both excellent hand cutting performance and appropriate mechanical strength.

Japanese Patent Laid-Open No. 04-222240 Japanese Patent Laid-Open No. 11-323689 JP 2010-95821 A JP 2012-97373 A

  However, in the technique described in Patent Document 4, although the hand cutting property is excellent, since the warp components are fused, the texture becomes hard, the followability to the adherend is poor, and the corner portion of the adherend As a result, there is a possibility that the finish may be deteriorated such as a gap is generated, and there are still problems in workability and finish.

  In view of the problems of the prior art, the present invention provides a base fabric used for an adhesive tape such as a hand-cut tape or a surgical tape that achieves both excellent hand cutting performance and appropriate mechanical strength and is excellent in workability, and uses the same. The purpose is to provide hand-cut tape and surgical tape.

In order to solve this problem, the present invention is characterized by the following configurations (1) to (13).
(1) At least a part of the warp and the weft is fused, and the fusion is caused by melting at least one component of the weft, and the cover factor of the warp is smaller than the cover factor of the weft. Characteristic base fabric for adhesive tape.
(2) The base fabric for an adhesive tape according to (1), wherein the fusion is performed without fusion of the warp.
(3) The pressure-sensitive adhesive tape according to (1) or (2), wherein at least a part of the weft is a polyester-based sheath-structure multifilament and the sheath includes a low melting point component having a melting point lower than that of the core. Base fabric fabric.
(4) The base fabric for an adhesive tape according to any one of (1) to (3), wherein at least a part of the weft is a polyester-based different shrinkage mixed multifilament.
(5) The base fabric for a pressure-sensitive adhesive tape according to any one of (3) and (4), wherein the weight ratio of the low melting point component in the weft is 20% or more.
(6) The base fabric for an adhesive tape according to any one of (1) to (5), wherein the total fineness of the weft is greater than the total fineness of the warp and the difference is 30 dtex or more.
(7) The base fabric for an adhesive tape according to any one of (1) to (6), wherein the warp is a multifilament having a total fineness of 100 dtex or less and the number of filaments is 10 or more.
(8) The base fabric for an adhesive tape according to any one of (1) to (7), wherein at least one of warp and weft is a false twisted yarn.
(9) The base fabric for an adhesive tape according to any one of (1) to (8), wherein at least part of the warp or the weft is a yarn containing a flame retardant polymer.
(10) The base fabric for an adhesive tape according to any one of (1) to (9), wherein the warp weave density is 120 yarns / 2.54 cm or less and the weft weave density is 60 yarns / 2.54 cm or more. fabric.
(11) An adhesive tape using the base fabric for an adhesive tape according to any one of (1) to (10).
(12) A surgical tape using the base fabric for an adhesive tape according to any one of (1) to (11).
(13) A packing tape using the base fabric for an adhesive tape according to any one of (1) to (11).

  According to the present invention, since a part of the weft is melted and fixed to the warp moderately, the base fabric for the adhesive tape has both excellent mechanical strength and excellent hand cutting properties and excellent workability. A woven fabric can be provided.

  Hereinafter, modes for carrying out the present invention will be described.

  One feature of the base fabric for adhesive tape of the present invention is that at least a part of the warp and the weft is fused, and the fusion is caused by melting at least one component of the weft. Specifically, at least a part of the warp and the weft can be fused by disposing a low melting point component on at least a part of the weft and melting at least the low melting point of the weft. As a result, when the adhesive tape is cut with bare hands, the fusion point between the warp and the weft becomes a fulcrum and the warp is easy to cut, so that excellent hand cutting performance is exhibited.

  In the base fabric for the pressure-sensitive adhesive tape of the present invention, it is preferable that the above-mentioned fusion is carried out without melting the warp. This is because the warp yarn does not melt and does not become harder in the direction in which the pressure-sensitive adhesive tape is wound than in the case where the warp yarn is not, and thus exhibits excellent followability to the adherend.

  Therefore, it is preferable that the warp component does not melt at a temperature at which at least one component (low melting point component) of the weft melted and fused to the warp starts to melt. More preferably, the warp component does not melt even at a temperature higher by 10 ° C. or more than the melting point of the low melting point component. That is, when at least one component of the warp has a melting point, the warp is preferably composed of a component having a melting point higher than the melting point of the low melting component of the weft, and more preferably 10 ° C. from the low melting point of the weft. The warp is preferably composed of components having a high melting point. The warp may be composed of a component having no melting point (however, a component that does not melt with a low melting point component of weft, such as a component having a thermal decomposition point on the higher temperature side than the low melting point component of weft). If the difference between the melting points of the warp component and the low melting point component of the weft (the temperature range where the low melting component of the weft melts but the warp component does not melt if the warp component does not have a melting point) is 10 ° C. or more The low melting point component of the weft is melted without melting the warp, and the temperature range in which the weft is fused to the warp is sufficiently wide. Since the base fabric for adhesive tapes can be obtained efficiently, it is preferable.

  The low melting point component used for the weft of the base fabric for the pressure-sensitive adhesive tape of the present invention can be appropriately selected and used according to the component of the warp.

  Examples of the low melting point component that can be used in the weft of the base fabric for the adhesive tape of the present invention include polyolefins such as polymethyl methacrylate, polyacrylonitrile, polyethylene, and polypropylene, and olefin (co) polymers such as copolymers containing these skeletons. Polyesters such as polyethylene terephthalate, polybutylene terephthalate, polyalkylene terephthalate such as polytrimethylene terephthalate, and copolymers containing these skeletons, polyamides such as nylon 6, nylon 66, etc. and copolymers containing these skeletons, etc. Polyurethane, polyimide, polyacetal, polyether, polystyrene, polycarbonate, polyesteramide, polyphenylene sulfide, polyvinyl chloride, polyetherester, polyvinyl acetate, polyvinyl chloride Butyral and ethylene - vinyl acetate copolymer, styrene - copolymer containing a skeleton of acrylic copolymer can be used. Among these, polyester is preferable because it is excellent in moisture absorption stability and thermal stability. As such a polyester, a copolyester having a melting point lower than that of polyethylene terephthalate composed of terephthalic acid and ethylene glycol can be preferably used. The copolyester is not particularly limited, but terephthalic acid and ethylene glycol are used as a basic skeleton, and isophthalic acid or the like, polyalkylene glycol, bisphenol A or the like is used as a copolymerization component. Polyesters that have been combined and copolymerized to lower the melting point, polyesters obtained by copolymerizing dicarboxylic acid components on the basic skeleton of terephthalic acid and ethylene glycol, flame retardant polyesters obtained by copolymerizing phosphorus-based flame retardant polymers, etc. Low and preferably used.

  In the present invention, the weft may be composed of only one component, but a weft composed of two or more components can be preferably used. Examples of wefts composed of two or more components include a method using a core-sheath structure yarn or a side-by-side yarn in which a low melting point component is a sheath and a high melting point component is a core, and a low melting point component and a high melting point component are simultaneously spun and pulled. It is possible to use differently contracted mixed yarns that are aligned and stretched.

  Further, not only one type of fiber but also two or more types of fibers may be used. For example, not only spun yarns and long fibers mixed with short fibers can be used as they are, but also two or more types of fibers can be made into a fiber structure such as a twisted yarn, false twisted yarn, and covered yarn yarn. The fiber structure can be appropriately selected and used as long as it satisfies the requirements of the present invention. Specifically, a method of using a spun yarn in which a short fiber of a low melting component and a short fiber of a high melting component are mixed, a method of twisting or false twisting a long fiber of a low melting component and a long fiber of a high melting component And a covered yarn in which a fiber having a high melting point component is wound around a fiber having a low melting point component around a core. In addition, instead of short fibers and long fibers of the high melting point component, short fibers and long fibers made of a component having no melting point (not melted or decomposed at the melting point of the low melting point component) may be used. These are referred to as a high melting point component for convenience.

  Further, when weaving, fibers having a low melting point component and other fibers can be driven in an appropriate ratio.

  Examples of the high melting point component that can be used in the weft in the present invention include acrylics such as polymethyl methacrylate and polyacrylonitrile, polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate, polybutylene terephthalate, and polytrimethylene terephthalate, nylon 6, Polyamide such as nylon 66, polyurethane, polyimide, polyacetal, polyether, polystyrene, polycarbonate, polyesteramide, polyphenylene sulfide, polyvinyl chloride, polyether ester, polyvinyl acetate, polyvinyl butyral, polyvinylidene fluoride, ethylene-vinyl acetate copolymer Examples thereof include a coalescence, a fluorine-based resin, and a styrene-acrylic copolymer.

  In addition, a low melting point component that does not melt can be appropriately selected and used as a high melting point component. Specifically, synthetic fibers such as aramid fibers that do not have a melting point, and natural fibers such as cotton, linen, and wool are combined with fibers made of another thermoplastic resin that is used as a low melting point component (mixed, mixed, and twisted). Etc.) or mixed weaving (drawn at the time of weaving, inserted at an appropriate interval, etc.) and used as a high melting point component.

  Among these, polyester fibers containing polyester are preferably used as the weft because they are excellent in moisture absorption stability and thermal stability. Among them, as the polyester fiber used in the weft of the present invention, the core-sheath yarn and the different shrinkage mixed yarn in which the low melting point component is arranged in the sheath are not only high in productivity and low cost, but also the low melting point component. Even if the fiber melts and the shape of the fiber disappears, the high melting point component remains in the fiber state, which is preferable in terms of having an appropriate strength. In this case, either or both of the low melting point component and the high melting point component may be polyester.

  Further, the low melting point component and the high melting point component can be preferably used even if they are a combination of different fibers, but from the viewpoint of fusion strength, the basic skeleton and the combination of fibers of the same type, that is, both components have an ester bond, etc. A combination of fibers made of polyester having a common bonding mode can be used more preferably, and a combination of polyester fibers made of a resin having a common basic skeleton, such as both components having an ethylene terephthalate component, is preferably used. it can.

  In addition, the method of adjusting the fusion area of the warp and weft, the number of fusion points, and the degree of fusion according to the weight ratio of the high melting point component and the low melting point component used in the weft is also excellent hand cutting and flexible. It can be preferably used to obtain a method for obtaining a texture. In addition, it is preferable that the weight ratio of a low melting-point component is 20% or more. More preferably, the low melting point component weight ratio is 30% or more. If the low melting point component is 20% or more, the fusion point and area of the weft and the warp are sufficient, so that good hand cutting properties can be obtained. The upper limit can be 100% or less, preferably about 90% or less, more preferably about 60% or less from the viewpoint of strength and flexibility.

  The warp used in the present invention is composed of one type or two or more types of fibers. The warp used for the base fabric for the pressure-sensitive adhesive tape of the present invention can be appropriately selected according to the components used for the weft so as to satisfy the requirements defined in the present invention.

  The warp of the present invention is not only used as a spun yarn or a long fiber mixed with short fibers, but also one or two or more types of fibers are used as a twisted yarn, false twisted yarn, covered yarn yarn, etc. The structure of the fiber can be appropriately selected and used. Among them, the false twisted yarn can increase the fusion strength between the warp and the weft by an anchor effect in which the fusion component of the weft enters the unevenness of the crimp, and serves as a fulcrum when cutting the warp with bare hands. An effect becomes high and favorable hand cutting property can be obtained. It is also possible to weave two or more kinds of fibers by aligning them during weaving.

  Examples of fibers used for warp include acrylic fibers such as polymethyl methacrylate and polyacrylonitrile, polyolefin fibers such as polyethylene and polypropylene, polyester fibers such as polyethylene terephthalate, polybutylene terephthalate and polytrimethylene terephthalate, nylon 6 , Polyamide fibers such as nylon 66, polyurethane fibers, polyimide fibers, polyacetal fibers, polyether fibers, polystyrene fibers, polycarbonate fibers, polyester amide fibers, polyphenylene sulfide fibers, polyvinyl chloride fibers, Polyether ester fiber, polyvinyl acetate fiber, polyvinyl butyral fiber, ethylene-vinyl acetate copolymer resin fiber, styrene-acryl copolymer resin fiber, Fluororesin fibers or or synthetic fiber such as aramid fiber, cotton, hemp, and fibers without melting as natural fibers of wool and the like can be used. Note that even high-strength fibers such as aramid fibers can be used by adjusting the fineness, combining with other fibers (blending, blending, etc.), blending, and adjusting the strength. It is possible to obtain a base fabric for an adhesive tape that takes advantage of properties (eg heat resistance, dimensional stability, etc.). The warp can be appropriately selected and used from these in accordance with the low melting point component of the weft, but from the viewpoint of fusion strength, a fiber made of a resin having a common bonding mode with the component of the weft is preferable, and the common basic A fiber made of a resin having a skeleton can be more preferably used.

  Of these, polyester fibers are preferably used because they are excellent in moisture absorption stability, thermal stability, and the like. As an example of the polyester fiber, a fiber of 100% polyethylene terephthalate which is relatively inexpensive and excellent in mechanical strength and workability can be preferably used. It is also possible to use a copolymerized polyester fiber having a terephthalic acid unit and an ethylene glycol unit as a basic skeleton and copolymerized with other components. Copolyester fiber has lower strength than polyester fiber of 100% polyethylene terephthalate, and it is possible to adjust the strength and tearability of the adhesive tape. Examples of copolyester fibers suitable for the present invention include cationic dyeable polyester fibers containing polyesters obtained by copolymerizing other dicarboxylic acid components on the basic skeleton of terephthalic acid units and ethylene glycol units, and terephthalic acid units and ethylene glycol units. A flame-retardant polyester fiber containing a polyester obtained by copolymerizing a phosphorus-based flame retardant monomer on the basic skeleton is preferably used. In addition, it is necessary to select a copolyester fiber having a melting point higher than that of the weft component.

  The total fineness of the wefts used in the present invention is preferably 20 dtex or more from the viewpoint of the strength of the base fabric, and more preferably 60 dtex or more. The upper limit is preferably 500 dtex or less from the viewpoint of thickness and flexibility. If it exceeds 500 dtex, the woven fabric becomes thick and hard, which is not preferable.

  The number of filaments of the weft is not particularly limited, but is preferably 5 or more from the viewpoint of flexibility, and more preferably 10 or more. The upper limit is preferably 500 or less from the viewpoint of fiber strength and productivity.

  The fineness of the warp and the weft is preferably such that the total fineness of the weft is larger than the total fineness of the warp, and the difference is preferably 30 dtex or more. More preferably, the difference in fineness between the warp and the weft is 60 dtex or more. When the difference in the fineness between the warp and the weft is 30 dtex or more, the weft has a sufficiently high strength and rigidity compared to the warp, so that it becomes a fulcrum when cutting the warp with bare hands and further improves hand cutting. It can be improved. The upper limit of the fineness difference between the warp and the weft is preferably 400 decitec or less, and more preferably 200 or less. When the difference in fineness is 400 dtex or less, it is preferable in that a base fabric having an excellent balance of strength in the warp and warp directions can be obtained.

  The warp used in the present invention is preferably a multifilament having a total fineness of 100 dtex or less. When it is 100 decitex or less, the thickness, basis weight, and texture of the fabric are excellent, and a more excellent base fabric is obtained by the workability as a base fabric for an adhesive tape. Preferably it is 60 dtex or less. The lower limit is preferably 5 dtex or more, more preferably 20 dtex or more from the viewpoint of the strength of the adhesive tape. It should be noted that if the total fineness of the warp is less than 5 dtex, a sufficient strength of the woven fabric cannot be obtained.

  In addition, the warp of the base fabric for adhesive tape of the present invention is preferably a multifilament having 10 or more filaments from the viewpoint of flexibility and hand cutting properties of the base fabric for adhesive tape, and is 20 or more. Is more preferable. By setting the number of filaments to 10 or more, the single yarn is thin and can be easily cut with bare hands, so that good hand cutting properties can be obtained. Moreover, since the fibers are supple, a woven fabric having a texture suitable as a base fabric for an adhesive tape can be obtained. The upper limit of the number of warp filaments is preferably 200 or less, and more preferably 130 or less, from the viewpoint of productivity.

  One feature of the present invention is that the warp cover factor is smaller than the weft cover factor. The cover factor of the warp of the woven fabric of the present invention is preferably 0.6 times or less of the cover factor of the weft, more preferably 0.5 times or less, and the larger the difference between the cover factors of the warp and the weft, the more preferable . However, the lower limit is preferably 0.1 times or more from the viewpoint of shape retention of the fabric. It is preferable that the cover factor of the warp is 0.1 times or more the cover factor of the weft, because the number of warps is sufficient to maintain the shape of the fabric. If a high melting point yarn is used for the warp yarn, it will have poor strength after heat treatment for fusion, and hand tearability will tend to deteriorate.However, by reducing the cover factor of the warp yarn and increasing the cover factor of the weft yarn, the weft yarn is better than the warp yarn. Since the strength is strong and the rigidity is high, the weft becomes a fulcrum and the warp is easy to cut.

  The woven fabric structure is not particularly limited, but plain weave, twill weave, satin weave and its change structure can be used. Above all, plain fabrics are the most suitable because of their strength and texture when used as a base fabric fabric for adhesive tape, and because they are lightweight and highly productive.

  In the adhesive tape base fabric of the present invention, the warp weave density is preferably 120 yarns / 2.54 cm or less, and the weft yarn density is preferably 60 yarns / 2.54 cm or more, and the warp weave density is 120 yarns / 2. More preferably, it is 54 cm or less and the weft weave density is 70 pieces / 2.54 cm or more. By setting the warp weave density to 120 yarns / 2.54 cm or less, the hand cutting property and flexibility necessary for a hand cutting tape can be achieved. By setting the weft weave density to 60 yarns / 2.54 cm or more, warp restraint becomes higher, the effect as a fulcrum when cutting the warp with bare hands is increased, and good hand cutting properties can be obtained. . The lower limit of the warp weave density is preferably 20 / 2.54 cm or more from the viewpoint of the strength of the base fabric, and more preferably 50 / 2.54 cm or more. The upper limit of the weft weave density is preferably 400 yarns / 2.54 cm or less, not only from the basis weight and flexibility of the base fabric, but also from the viewpoint of productivity, and is preferably 250 yarns / 2.54 cm or less. More preferred.

  As a method of fusing the warp and the weft of the base fabric of the present invention, heat is applied to the woven fabric at a temperature equal to or higher than the melting point of the low melting point component which is at least one component of the weft, and the fusion is performed by melting at least one component of the weft. More preferably, a method in which the weft is fused to the warp without melting the warp by setting the heat applied in addition thereto to a temperature at which the warp does not melt is more preferable. The method for applying heat is not particularly limited, but heat can be applied by a hot air dryer, a tenter, a steam setter, a hot roll or a calendar roll. Among them, a tenter that can continuously apply heat at a high speed is optimal.

  The base fabric for the adhesive tape of the present invention has a tear strength in the warp cutting direction lower than the tear strength in the weft cutting direction, and the difference is preferably 1.5 N or more, more preferably 2.0 N or more. There is a greater difference. Thereby, the excellent hand cutting property can be obtained.

  On the other hand, the tear strength in the warp direction of the base fabric is preferably 4.0 N or more. This is because the lower the tear strength in the warp cutting direction, the better the hand-cut yarn, but the tape may be broken by the operation of applying the adhesive tape, which is not preferable.

  The thickness is preferably thin from the viewpoint of flexibility and appearance when attached to an object. In addition, although the upper limit of the thickness of a base fabric is influenced by the adhesive to be applied, it is preferably 0.2 mm or less. As a lower limit, flexibility is important for the pressure-sensitive adhesive tape. However, if there is no tension or stiffness, the pressure-sensitive adhesive tape is liable to be twisted or curled when applied to an object, and workability is significantly impaired. .05 mm or more is preferable.

  It is preferable that at least one surface of the base fabric of the present invention is water repellent. When the pressure-sensitive adhesive tape is used, the pressure-sensitive adhesive is applied. However, it is possible to prevent problems that the pressure-sensitive adhesive penetrates to the opposite side of the fabric application surface and damages the appearance of the fabric or soils the processing machine. As a method of water repellent treatment, a method of dipping a woven fabric in a water repellent dispersion, drawing with a nip roll and drying with a tenter (Dip-nip method), or coating with a roll coater or knife coater can be preferably used.

  By applying an adhesive to at least one surface of the base fabric of the present invention, an adhesive layer can be formed and used as an adhesive tape.

  Examples of the pressure-sensitive adhesive include acrylic pressure-sensitive adhesives, rubber-based pressure-sensitive adhesives, silicone-based pressure-sensitive adhesives, urethane-based pressure-sensitive adhesives, and the like, which can be appropriately selected depending on the application. Among these, acrylic adhesives are preferable in terms of chemical resistance, heat resistance, weather resistance, and ease of handling during production.

  As the acrylic pressure-sensitive adhesive, an acrylic polymer obtained by polymerizing a raw material monomer including a (meth) acrylic acid alkyl ester and a carboxyl group-containing unsaturated monomer can be used. The (meth) acrylic acid alkyl ester and the carboxyl group-containing unsaturated monomer that can be used here are not particularly limited, and one or more types each capable of copolymerization are appropriately selected and used in combination. Examples of (meth) acrylic acid alkyl esters include methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, normal propyl acrylate, normal propyl methacrylate, isopropyl acrylate, isopropyl methacrylate, normal butyl acrylate, normal butyl methacrylate, isobutyl acrylate, isobutyl Methacrylate, secondary butyl acrylate, secondary butyl methacrylate, tertiary butyl acrylate, tertiary butyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, normal octyl acrylate, normal octyl methacrylate, isooctyl acrylate, isooctyl methacrylate , Mention may be made of normal-nonyl acrylate, n-nonyl methacrylate, isononyl acrylate, and isononyl methacrylate. Examples of the carboxyl group-containing unsaturated monomer include acrylic acid, methacrylic acid, itaconic acid, fumaric acid, maleic acid and the like.

  Although it does not specifically limit as a rubber-type adhesive, As an example, what mixed and selected the rubber component and the tackifier suitably is mentioned. The rubber component and the tackifier are not particularly limited. Examples of the rubber component include natural rubber, styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer (SBS), Examples include hydrogenated styrene block copolymer (SIPS, SEBS), styrene-butadiene rubber (SBR), polyisoprene rubber (IR), polyisobutylene (PIB), butyl rubber (IIR), etc. These include rosin resin, terpene resin, petroleum resin and the like.

  The silicone-based pressure-sensitive adhesive is not particularly limited, and examples thereof include those obtained by appropriately selecting and blending silicone resin or silicone oil with silicone rubber. The urethane-based pressure-sensitive adhesive is not particularly limited, and examples include polyols such as polyether-based polyols and polyester-based polyols, tolylene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), hexamethylene diisocyanate (HDI), and xylylene. Examples include those obtained by reacting a polyisocyanate such as range isocyanate (XDI).

  Furthermore, an additive can be added to the pressure-sensitive adhesive used in the pressure-sensitive adhesive tape of the present invention depending on the purpose. Examples of additives include crosslinkers, softeners, tackifiers, surface lubricants, leveling agents, antioxidants, corrosion inhibitors, light stabilizers, UV absorbers, heat stabilizers, polymerization inhibitors, silane cups Examples thereof include a ringing agent, a lubricant, an inorganic or organic filler, a metal powder, a pigment, and the like, and one or two or more types can be appropriately selected and contained depending on the application and function. Among them, the crosslinking agent and the tackifier are particularly preferable because they can reduce the low molecular components of the adhesive by reaction and trapping, and can suppress “back through” in which the adhesive penetrates into the back side of the base fabric. .

  The pressure-sensitive adhesive used in the pressure-sensitive adhesive tape of the present invention is preferably an organic solvent-type pressure-sensitive adhesive containing an organic solvent or an emulsion-type pressure-sensitive adhesive dispersed in an aqueous binder. Organic solvent-type adhesives and emulsion-type adhesives can be easily used because they can be easily mixed with additives and other chemicals, and are easy to handle in the production process described later.

  Moreover, the manufacturing method and manufacturing apparatus of the adhesive tape of this invention are not specifically limited, An adhesive layer can be formed on a base fabric fabric using the manufacturing method and manufacturing apparatus of a general adhesive tape. Examples of the production method include a direct method in which an adhesive is directly applied to a base fabric, and a transfer method in which an adhesive once applied to another sheet is transferred to the base fabric. Of these, the direct method with a simpler process than the transfer method is more preferable. Examples of production methods include roll coat method, spray coat method, gravure coat method, reverse coat method, rod coat method, bar coat method, die coat method, kiss coat method, reverse kiss coat method, air knife coat method, etc. And a method of applying an adhesive to another sheet.

  The base fabric for adhesive tape of the present invention is suitably used as a base fabric for adhesive tape, and among them, it can be suitably used for base fabrics such as packing tape, curing tape, and surgical tape.

  Hereinafter, although an example is given and the present invention is explained, the present invention is not necessarily limited to this. The measurement methods for various characteristics used in this example and the criteria for comprehensive evaluation were as follows.

[Measurement method of characteristics]
Among the following measurement methods, unless otherwise specified, sample preparation and measurement were performed in the standard state of JIS-L-0105 (2006) (20 ± 2 ° C., relative humidity 65 ± 4%).

(1) Fineness (apparent fineness)
It measured according to the positive fineness (A method) prescribed | regulated to JIS-L-10013 8.3.1.

(2) Thickness (mm)
JIS-L-1096 (2010). 8.4 According to the A method (JIS method), a 5 × 5 cm test piece is taken from five arbitrary locations on the fabric, and a dial thickness gauge (H-2.4N) having a measuring diameter of 10 mmφ and a measuring force of 2.4 N is used. , Manufactured by Ozaki Mfg. Co., Ltd.), and measured five locations on the test piece, and calculated the average value.

  The thickness of the adhesive layer was calculated by the following equation by measuring the thickness of the base fabric and the thickness of the adhesive tape.

Adhesive layer thickness = Adhesive tape thickness-Base fabric thickness (3) Weave density (2.5cm)
JIS-L-1096 (2010). 8.6.1 According to the A method, the warp woven density and the weft woven density of the woven fabric were measured in a section of 2.54 cm (1 inch).

(4) Cover factor The cover factor was calculated for the warp and weft by the following formula.
Fineness (decitex) ^1/2 × weave density (main / 2.54cm)

In addition, in the case of the twisted yarn, the alignment on the woven fabric, and the mixed woven fabric, the calculation is performed as follows.
-Twisted yarn: When a plurality of yarns are twisted, the total fineness of the twisted yarn is defined as the fineness, and the cover factor is calculated based on the fineness.
That is, the cover factor a ^1/2 × x is calculated from the fineness a of the twisted yarn A and the woven density x pieces ^/ 2.54 cm.

-Blended yarn: When a plurality of yarns are blended, the total fineness of the blended yarn is regarded as the fineness described above, and the cover factor is calculated based on the fineness.
That is, the cover factor b ^1/2 × x is calculated from the fineness b of the mixed yarn B and the woven density x pieces ^/ 2.54 cm.

・ Alignment: For a woven fabric that uses one type of yarn and that has been aligned on the fabric during weaving, the total fineness of the yarn before alignment is the fineness of the above formula, and each of the yarns before alignment The cover factor is calculated from the fineness and the weave density.
That is, when n fibers A having a fineness a are arranged, the cover factor a ^1/2 × x is calculated from the fineness a of the fibers A and the weaving density x fibers ^/ 2.54 cm of the fibers A.

-Mixed weaving: For fabrics that are arranged at an arbitrary ratio on the fabric during weaving using two or more types of yarns, the cover factor is obtained for each type and totaled. That is, the total fineness of each yarn is defined as the fineness, and the cover factor of each yarn is first calculated from the fineness and the weave density, and summed up.
That is, when the fiber A having a fineness a is woven at a weaving density x / 2.54 cm and the fiber B having a fineness b is woven at a weaving density y / 2.54 cm, the sum of the cover factor of the fiber A and the cover factor of the fiber B The fabric cover factor a ^1/2 × x + b ^1/2 × y is calculated.

(5) Tensile strength (N / 19mm) and elongation (%) of base fabric
In accordance with JIS-L-1096 (2010) 8.14 A method, specimens were sampled at 5 points each from the place randomly extracted from the fabric, 19 mm wide x 300 mm long in each direction. In other words, in the case of tensile strength and elongation in the warp direction, a test piece of 19 mm in the weft direction x 300 mm in the warp direction was taken, and in the case of the tensile strength and elongation in the weft direction, 19 mm in the warp direction x weft A test piece having a direction of 300 mm was collected, and a tensile test was performed n = 3 times under the conditions of a tensile length of 200 mm and a tensile speed of 200 mm / min using a constant speed tensile test, and the average value was calculated. Further, the elongation when the fabric broke was defined as the elongation.

(6) Tear strength of base fabric (N)
JIS-L-1096 (2010). 8.17.4 It calculated | required by the method based on D method (penjuram method). For the measurement, test specimens were collected at five locations randomly extracted from the fabric, and the average value of the measurement results was calculated.

  In the tear strength, the warp direction is the warp direction (warp cut direction), and the weft cut direction is the weft direction (weft cut direction).

(7) Melting point (℃)
According to JIS-K-7121 (2012), the measurement was performed using a differential scanning calorimeter DSC (DSC-60, manufactured by Shimadzu Corporation). Measurement (fiber) was performed on 2.0 mg of a sample at a heating rate of 10 ° C./min, a target temperature of 300 ° C., and a hold time of 5 minutes, and the extreme temperature of the obtained melting endothermic curve (at the time of heating) was determined as the melting point ( ° C). The number of tests was 5, and the average value was calculated.

  In the case of the core-sheath structure yarn, the melting point was specified based on the polar region derived from each component from the melting endothermic curve (at the time of temperature increase).

(8) Confirmation of fusion state After the fusion process, the fabric surface and cross-section were confirmed by magnifying them 100 times with a microscope, and the fusion state of warp and weft was confirmed.

(9) Hand-cut property A 19 mm-wide base fabric and adhesive tape were torn by hand to evaluate “easy to tear” and “beauty of the cut”. “Easy to tear” means that five workers have evaluated the ease of tearing by sensory evaluation, and the number of persons judged as “easy to tear” is “◎” for all five persons, and “○” for three to four persons. “△” indicates the case of 1 to 2 persons or less, and “X” indicates the case of 0 persons or the case where tearing was not possible. Further, “the beauty of the cut surface” was determined by observing with a microscope magnified 100 times. Judgment is easy to tear, observe the cut across the entire width of the pressure-sensitive adhesive tape, and “◎” when the number of uncut warp yarns is 0 per 100 warp yarns, and 1 uncut warp yarn (髭). When there were ˜2 yarns, “◯” was given, when there were 3 or more uncut warps (髭), “△”, and when tearing was not possible, “x”.

(10) Tensile strength (longitudinal direction, N / 19 mm) and elongation (longitudinal direction,%) of adhesive tape
According to JIS-Z-0237 (2009), five test specimens having a length of 400 mm were collected from an adhesive tape having a width of 19 mm, wound around a drum-type chuck having a diameter of about 100 mm, and pulled at a pulling speed of 5 mm / min. It calculated | required from the average value.

(11) Adhesive strength of adhesive tape (adhesive strength with stainless steel plate)
In accordance with JIS-Z-0237 (2009) (stripping direction and method is method 1), a 19 mm wide adhesive tape is applied to a stainless steel plate and crimped with a manual crimping device, temperature 23 ± 1 ° C., humidity 50 The test piece was obtained by curing at ± 5% for 12 hours. Using a tensile tester, fix the adhesive tape on one side of the chuck and a stainless steel plate on the other side, and pull at a rate of 5 ± 1 mm / min in the direction of 180 degrees (the direction in which the back surfaces of the adhesive tape overlap) The adhesive strength was measured without pulling.

(12) Adhesive strength of adhesive tape (adhesive strength with the back of the tape)
In accordance with JIS-Z-0237 (2009) (stripping direction and method is method 2), a 19 mm wide adhesive tape is applied to the back of the other adhesive tape, and then crimped with a manual crimping device. Obtained. Within 1 minute after pressure bonding, using a tensile tester, the adhesive tape was pulled at a rate of 5 ± 1 mm / min in the direction in which the back surfaces of the adhesive tape overlapped, and the adhesive strength was measured.

(13) Rewind force Measured according to JIS-Z-0237 (2009) (low-speed rewind) using an adhesive tape having a width of 19 mm.

(14) Followability to adherend JIS-C-2107 (2011). 15 (terminal peeling test). In the test, an adhesive tape having a width of 19 mm and a length was wound around a 6 mmφ metal rod while applying a load of 600 g to prepare a test piece. After the test piece was treated in a dryer at 50 ° C. for 24 hours, the presence or absence of lifting of the tape terminal was visually confirmed. A tape terminal that does not lift is indicated by “◯”, and a tape terminal that has a lift is indicated by “X”.

[Example 1]
Multifilament single yarn with a total fineness of 70 dtex and 36 filaments is a core-sheath structured yarn, and the sheath component is polyester (terephthalic acid / isophthalic acid / bisphenol A / ethylene glycol polycondensate, melting point 233 ° C.), core Polyester false twisted yarn with a total fineness of 33 dtex and 12 filaments (polyethylene terephthalate resin, melting point 255) using wefts (low melting point component weight ratio 30%) consisting of polyethylene terephthalate (melting point 255 ° C.) And weaving the fabric for 30 seconds with a pin tenter set at 240 ° C. to melt the copolyester component of the weft, and warp weave density of 106 / 2.54 cm, weft weave A base fabric for adhesive tape with a density of 264 / 2.54cm is obtained. . Table 1 shows the evaluation results of the obtained base fabric. As a base fabric for an adhesive tape, it was possible to obtain a good hand cutting property as well as a sufficient tensile strength.

[Example 2]
A single filament of a multifilament with a total fineness of 210 dtex and 118 filaments is a core-sheath structured yarn, and the sheath component is polyester (terephthalic acid / isophthalic acid / bisphenol A / ethylene glycol polycondensate, melting point 233 ° C.), core Polyester false twisted yarn (polyethylene terephthalate, melting point 255) having a total fineness of 33 dtex and a filament number of 12 for warp using weft yarn (component having a low melting point of 30%) consisting of polyethylene terephthalate (melting point: 255 ° C.) ℃) Weaving the woven fabric, heat setting this fabric with a pin tenter set at 240 ℃ for 30 seconds to melt the copolymer polyester component of the warp, and warp weave density 107 / 2.54cm, weft weave density 85 A base fabric for an adhesive tape having a flat fabric of /2.54 cm was obtained. Table 1 shows the evaluation results of the obtained base fabric. As a base fabric for an adhesive tape, it was possible to obtain a good hand cutting property as well as a sufficient tensile strength.

[Example 3]
It is a multifilament with a total fineness of 84 dtex and a filament count of 36. Of the 36 single yarns, 18 are made of polyethylene terephthalate (melting point 255 ° C.), and the other 18 single yarns are copolymerized polyester (terephthalic acid).・ Using a different shrinkage mixed yarn (weight ratio 30% of low melting point component) consisting of isophthalic acid, bisphenol A, ethylene glycol polycondensate, melting point 233 ° C.) for the weft, total fineness 33 decitex, number of filaments 12 Weaving a woven fabric using two polyester false twisted yarns (polyethylene terephthalate, melting point 255 ° C), heat setting the fabric with a pin tenter set at 240 ° C for 30 seconds, and melting the copolymer polyester component of the warp , Warp weave density 100 / 2.54 cm, weft weave density 242 / 2.54 cm Obtain a base cloth fabric adhesive tape for textile. Table 1 shows the evaluation results of the obtained base fabric. As a base fabric for an adhesive tape, it was possible to obtain a good hand cutting property as well as a sufficient tensile strength.

[Example 4]
As a phosphorus-based flame retardant polymer, a multifilament flame retardant yarn consisting of polyester (melting point 180 ° C) copolymerized with an aromatic condensed phosphate ester and having a total fineness of 84 dtex and 36 filaments is used as the weft. Weaving a woven fabric using polyester false twisted yarn (polyethylene terephthalate, melting point 255 ° C.) having a fineness of 44 dtex and 12 filaments, heat setting this fabric with a pin tenter set at 190 ° C. for 30 seconds, While the polymerized polyester component was melted, a plain woven fabric for pressure-sensitive adhesive tapes having a warp weave density of 112 / 2.54 cm and a weft weave density of 200 / 2.54 cm was obtained. Table 1 shows the evaluation results of the obtained base fabric. As a base fabric for an adhesive tape, it was possible to obtain a good hand cutting property as well as a sufficient tensile strength.

[Example 5]
A back surface treatment (water-repellent treatment) was applied to one side of the base fabric fabric for the pressure-sensitive adhesive tape obtained in Example 1, and a pressure-sensitive adhesive layer having a thickness of about 30 μm was formed on the other side to produce a pressure-sensitive adhesive tape raw sheet. . And after winding this original fabric sheet around a paper tube, the whole paper tube was slit to 19 mm width, and the adhesive tape roll was produced.

  The pressure-sensitive adhesive layer is formed by mixing a tackifier (xylene resin) and an isocyanate-based crosslinking agent in a pressure-sensitive adhesive containing about 5% by mass of acrylic acid and the balance being butyl acrylate. The product was diluted with an organic solvent and applied to one side of the base fabric by a roll coating method, and then dried by heating to volatilize and remove the organic solvent. A method of cross-linking the acrylic polymer and the isocyanate cross-linking agent was used.

  The evaluation results of the obtained adhesive tape are shown in Table 2.

[Example 6]
The adhesive tape was obtained using the same method as Example 5 using the base fabric fabric for adhesive tapes obtained in Example 4.

  The evaluation results of the obtained adhesive tape are shown in Table 2.

[Comparative Example 1]
The plain fabric of Example 1 was not heat-set, and the fabric as it was was used as the base fabric for the adhesive tape.

  Table 1 shows the evaluation results of the obtained base fabric. In addition, the adhesive tape was not able to cut warp by hand, and was not able to obtain hand cutting property.

[Comparative Example 2]
Using a multi-filament core-sheath structure yarn with a total fineness of 70 dtex and 36 filaments used for the wefts in Example 1 as a warp, the weft yarn has a total fineness of 167 dtex and a polyester false twisted yarn with 144 filaments (polyethylene) A plain woven fabric having a warp weaving density of 54 / 2.54 cm and a weft density of 78 / 2.54 cm was obtained using terephthalate (melting point: 255 ° C.). This fabric was heat-set for 30 seconds with a pin tenter set at 240 ° C. to obtain a base fabric for an adhesive tape. Table 1 shows the evaluation results of the obtained base fabric.

  Table 1 shows the evaluation results of the obtained base fabric. As the base fabric for the adhesive tape, the beauty of the cut edge is excellent, but the ease of tearing varies, which is inferior to the present invention.

[Comparative Example 3]
A multifilament having a total fineness of 84 dtex and 36 filaments used in the weft yarn in Example 3, and 18 of the 36 single yarns are made of polyethylene terephthalate (melting point 255 ° C.), and the other 18 single yarns. Using warp yarns with different shrinkage mixed yarns (weight percentage of low melting point component 50%) made of copolymerized polyester (terephthalic acid / isophthalic acid / bisphenol A / ethylene glycol polycondensate, melting point 233 ° C.) Using a polyester false twisted yarn (polyethylene terephthalate, melting point 255 ° C.) having a total fineness of 150 dtex and 30 filaments, a plain woven fabric having a warp density of 69 / 2.54 cm and a weft density of 78 / 2.54 cm is obtained. It was. This fabric was heat-set for 30 seconds with a pin tenter set at 240 ° C. to obtain a base fabric for an adhesive tape. Table 1 shows the evaluation results of the obtained base fabric.

  Table 1 shows the evaluation results of the obtained base fabric. As the base fabric for the adhesive tape, the beauty of the cut edge is excellent, but the ease of tearing varies, which is inferior to the present invention.

[Comparative Example 4]
A multifilament with a total fineness of 75 dtex made of diacetate resin (melting point 260 ° C.) and a multifilament with 21 filaments is used as the warp, and a multifilament with a total fineness of 150 dtex and 48 filaments made of the same diacetate resin as the warp is used for the weft Thus, a plain fabric with a warp weave density of 178 / 2.54 cm and a weft weave density of 62 / 2.54 cm was obtained to obtain a base fabric for an adhesive tape. Table 1 shows the evaluation results of the obtained base fabric. As a base fabric for an adhesive tape, good hand cutting properties could not be obtained.

[Comparative Example 5]
A multifilament with a total fineness of 75 dtex made of diacetate resin (melting point 260 ° C.) and 21 filaments is used as the warp, and a multifilament with a total fineness of 150 dtex consisting of triacetate (melting point 290 ° C.) and 48 filaments is used as the weft. A plain woven fabric having a warp weave density of 178 / 2.54 cm and a weft weave density of 62 / 2.54 cm was obtained as a weft. This fabric was heat-set for 30 seconds with a pin tenter set at 240 ° C. to obtain a base fabric for an adhesive tape.

  Table 1 shows the evaluation results of the obtained base fabric. As a base fabric for an adhesive tape, good hand cutting properties could not be obtained.

[Comparative Example 6]
Using the base fabric for the adhesive tape obtained in Comparative Example 2, the same method as in Example 5 was used to obtain an adhesive tape.

[Comparative Example 7]
An adhesive tape was obtained in the same manner as in Example 5 using the adhesive fabric for adhesive tape obtained in Comparative Example 3.

  According to Table 1, in Examples 1 to 4, a base fabric for an adhesive tape having both moderate mechanical strength and excellent hand cutting properties, a beautiful cut surface, a smooth surface, and a good appearance is obtained. It was. In particular, in Examples 1 and 3, the difference between the warp direction and the weft direction of the woven fabric cover factor and tear strength was large, and particularly excellent hand cutting properties could be obtained.

  However, in Comparative Examples 1-5, it was not possible to achieve both moderate mechanical strength and excellent hand cutting properties. Comparative Example 1 could not be torn. In Comparative Example 2, the cut end was beautiful, but sufficient tearability was not obtained. In Comparative Examples 3 to 4, the mechanical strength was excellent, but good hand cutting properties could not be obtained.

  Moreover, according to Table 2, in Examples 5 and 6, an adhesive tape having excellent mechanical strength and adhesiveness as an adhesive tape, and excellent in ease of tearing and followability to an adherend was obtained. However, in Comparative Examples 6 and 7, although the adhesive tape has sufficient mechanical strength and adhesiveness, it was not possible to obtain good hand cutting properties (easy to tear) and followability to the adherend. .

Claims (13)

At least a part of the warp and the weft is fused, the fusion is caused by melting at least one component of the weft, and the cover factor of the warp is smaller than the cover factor of the weft Base fabric for adhesive tape. The base fabric for an adhesive tape according to claim 1, wherein the fusion is performed without fusing the warp. The base fabric for an adhesive tape according to claim 1 or 2, wherein at least a part of the weft is a polyester-based core-sheath structure multifilament, and the sheath includes a low melting point component having a melting point lower than that of the core. The base fabric for an adhesive tape according to any one of claims 1 to 3, wherein at least a part of the weft is a polyester-based different shrinkage mixed multifilament. The base fabric for a pressure-sensitive adhesive tape according to any one of claims 3 and 4, wherein the weight ratio of the low melting point component in the weft is 20% or more. The base fabric fabric for an adhesive tape according to any one of claims 1 to 5, wherein the total fineness of the weft is larger than the total fineness of the warp, and the difference is 30 dtex or more. The adhesive tape base fabric according to any one of claims 16 to 17, wherein the warp yarns are multifilaments having a total fineness of 100 dtex or less, and the number of filaments is 10 or more. The base fabric for an adhesive tape according to any one of claims 1 to 7, wherein at least one of the warp and the weft is a false twisted yarn. 9. The base fabric for an adhesive tape according to claim 1, wherein at least a part of the warp or the weft is a yarn containing a flame retardant polymer. The base fabric of the pressure-sensitive adhesive tape according to any one of claims 1 to 9, wherein the warp weave density is 120 yarns / 2.54 cm or less and the weft yarn density is 60 yarns / 2.54 cm or more. The adhesive tape which uses the base fabric fabric for adhesive tapes in any one of Claims 1-10. The surgical tape which uses the base fabric for adhesive tapes in any one of Claims 1-11. The packing tape which uses the base fabric for adhesive tapes in any one of Claims 1-11.