Low smoke-generating hook-and-loop fastener and method for producing same, heat insulation member fastening tool, heat insulation member using same, and method for fixing same

Abstract

This hook-and-loop fastener comprises: a base fabric having a first surface on the front side and a second surface on the back side; a plurality of hook-shaped and / or loop-shaped engagement elements that protrude from the first surface of the base fabric and that are formed from engagement element yarns which constitute a portion of the base fabric; and an adhesive resin that fixes the engagement element yarns within the base fabric. In a test using TG-DTA, the temperature at which the weight of the hook-and-loop fastener decreases by 0.5 wt% may be 235°C or higher. Alternatively, in the test using TG-DTA, the temperature at which the weight of the hook-and-loop fastener decreases by 1.0 wt% may be 264°C or higher.

Description

Low-smoke hook-and-loop fastener and method for manufacturing the same, as well as a fastener for thermal insulation material, thermal insulation material using the same and method for fixing the same. Related applications

[0001] This application claims priority to Japanese Patent Application No. 2024-227791, filed on 24 December 2024, which is incorporated herein by reference as forming part of this application.

[0002] The present invention relates to a hook-and-loop fastener suitable for use in high-temperature environments and a method for manufacturing the same. The present invention also relates to an insulating material fastener equipped with a hook-and-loop fastener, an insulating material using the same, and a method for fixing the same.

[0003] Velcro fasteners are widely used in various applications because they are easy to attach and detach and can be reused. In particular, in applications related to vehicles such as automobiles, aircraft, and trains, special clothing such as fire-resistant clothing and firefighter suits, and high-temperature work clothes, and industrial insulation materials such as heating jackets, heat resistance is required because they are exposed to high temperatures.

[0004] For use in high-temperature environments, hook-and-loop fasteners with improved properties such as heat resistance and flame retardancy have been proposed. For example, Patent Document 1 (U.S. Patent Application Publication No. 2004 / 0166282) discloses a fastener component comprising a woven base fabric containing flame-retardant fibers and a plurality of polymer fibers woven into the woven base fabric that melt or decompose when exposed to flame, wherein the fibers form fastener elements extending from a broad surface of the base fabric to releasably engage with an associated fastener component, and these fibers are bound together by a binder impregnated into the base fabric.

[0005] U.S. Patent Application Publication No. 2004 / 0166282

[0006] Some conventional products, even heat-resistant hook-and-loop fasteners, emit smoke when used in high-temperature environments. Patent document 1 describes fastener components that meet the requirements for use in aircraft, and states that not only the polymer forming the fastener elements but also the binder of the woven fabric should be selected with smoke emission in mind. However, no other specific proposals have been made from the viewpoint of suppressing the smoke emission of hook-and-loop fasteners.

[0007] Therefore, the object of the present invention is to provide a hook-and-loop fastener that is less likely to produce smoke.

[0008] As a result of diligent research to achieve the above objective, the inventors investigated conventional commercially available products and found that one of the factors affecting the smoke emission of hook-and-loop fasteners is the presence or absence of a back coat, and that even if the back coat is flame-retardant, smoke emission is likely to occur when a back coat is applied. The inventors considered that hook-and-loop fasteners that produce smoke contain materials that decompose easily when used in high-temperature environments, and found that the decomposition rate of hook-and-loop fasteners can be used as an indicator of low smoke emission. Furthermore, even for hook-and-loop fasteners without a back coat, the inventors focused on the adhesion of oils and found that by adding a scouring process to the hook-and-loop fasteners during manufacturing to remove oils and other substances adhering to the product, smoke emission can be suppressed, leading to the completion of the present invention.

[0009] In other words, the present invention may be configured in the following embodiments. [Embodiment 1] A hook-and-loop fastener comprising a base fabric having a first surface as the front side and a second surface as the back side, a plurality of hook-shaped and / or loop-shaped engaging elements formed from threads for engaging elements that rise from the first surface of the base fabric and constitute a part of the base fabric, and an adhesive resin for fixing the threads for engaging elements within the base fabric, wherein in a test using TG-DTA, the temperature at which the weight of the hook-and-loop fastener decreases by 0.5 wt% is 235°C or higher (preferably 260°C or higher, more preferably 300°C or higher, even more preferably 350°C or higher, and particularly preferably 370°C or higher). [Aspect 2] A hook-and-loop fastener comprising a base fabric having a first surface as the front and a second surface as the back, a plurality of hook-shaped and / or loop-shaped engaging elements formed from engaging element yarns that rise from the first surface of the base fabric and constitute a part of the base fabric, and an adhesive resin for fixing the engaging element yarns within the base fabric, wherein in a test using TG-DTA, the temperature at which the weight of the hook-and-loop fastener decreases by 1.0 wt% is 264°C or higher (preferably 285°C or higher, more preferably 320°C or higher, even more preferably 360°C or higher, and particularly preferably 380°C or higher). [Aspect 3] The hook-and-loop fastener according to aspect 1 or 2, wherein the base fabric is a woven fabric, and the warp and / or weft yarns constituting the woven fabric include multifilament yarns. [Aspect 4] The hook-and-loop fastener according to any one aspect of aspects 1 to 3, wherein the yarns constituting the base fabric and / or the engaging element yarns are made of heat-resistant fibers. [Aspect 5] The hook-and-loop fastener according to any one aspect of aspects 1 to 4, wherein the adhesive resin includes a molten material of heat-fusible yarn. [Aspect 6] The hook-and-loop fastener according to aspect 5, wherein the heat-fusible yarn is a non-composite fiber. [Aspect 7] The hook-and-loop fastener according to aspect 5 or 6, wherein the heat-fusible yarn contains a polyester resin. [Aspect 8] The hook-and-loop fastener according to any one of aspects 1 to 7, wherein the adhesive resin has a continuous planar portion. [Aspect 9] The hook-and-loop fastener according to aspect 8, wherein the adhesive resin penetrates at least a portion of the base fabric.[Aspect 10] A hook-and-loop fastener according to any one of aspects 1 to 9, wherein the adhesive resin is at least one selected from the group consisting of polyester resin, acrylic resin, crosslinked polyurethane resin, crosslinked acrylic resin, and silicone resin. [Aspect 11] A hook-and-loop fastener according to any one of aspects 1 to 10, wherein the smoke concentration (Ds) in the flameless method in a test based on ASTM E662 is less than 27.5 (preferably less than 19.0, more preferably less than 10.0). [Aspect 12] A fastener for fixing an insulating material, wherein the fastener comprises a hook-and-loop fastener according to any one of aspects 1 to 11. [Aspect 13] An insulating material comprising the fastener for fixing an insulating material according to aspect 12. [Aspect 14] A method for fixing an insulating material using the fastener for fixing an insulating material according to aspect 12. [Aspect 15] A hook-and-loop fastener comprising a base fabric having a first surface as the front side and a second surface as the back side, a plurality of hook-shaped and / or loop-shaped engaging elements formed from threads for engaging elements that rise from the first surface of the base fabric and constitute a part of the base fabric, and an adhesive resin for fixing the threads for engaging elements within the base fabric, wherein in a test using TG-DTA, the temperature at which the weight of the hook-and-loop fastener decreases by 0.5 wt% is 235°C or higher (preferably 260°C or higher, more preferably 300°C or higher, even more preferably 350°C or higher, and particularly preferably 370°C or higher), wherein the method for manufacturing a hook-and-loop fastener is to perform the following steps B and D, and optionally step C, in the following order. [Step B] A step of fixing the thread for the engaging element into the base fabric with adhesive resin, [Step C] If a hook-shaped engaging element is to be formed, a step of cutting one leg of the loop to make the loop a hook-shaped engaging element, and [Step D] A step of scouring the hook-and-loop fastener. [Aspect 16] A method for manufacturing a hook-and-loop fastener according to aspect 15, wherein step B is performed by applying adhesive resin to the second surface of the loop base fabric. [Aspect 17] A method for manufacturing a hook-and-loop fastener according to aspect 15 or 16, wherein the following step A is performed before step B.[Step A] A step of heat-treating a loop base fabric, which is formed of thermoplastic resin fibers and in which threads for engaging elements rise in a loop shape from a first surface of the base fabric, at a temperature of Tg + 15°C or higher (preferably Tg + 50°C or higher, more preferably Tg + 70°C or higher, and even more preferably Tg + 100°C or higher) of the thermoplastic resin fiber with the highest glass transition temperature among the thermoplastic resin fibers constituting the loop base fabric, while under tension. [Aspect 18] A method for manufacturing a hook and loop fastener according to aspect 17, wherein if the base fabric contains heat-fusible threads containing adhesive resin as threads constituting the base fabric, step B is performed by solidifying the heat-fusible threads that have been melted in the heat treatment of step A.

[0010] Furthermore, any combination of at least two components disclosed in the claims and / or the specification and / or drawings is included in the present invention. In particular, any combination of two or more claims described in the claims is included in the present invention.

[0011] The present invention provides a hook-and-loop fastener that is less likely to produce smoke even when used in high-temperature environments.

[0012] This invention will be more clearly understood from the following description of preferred embodiments with reference to the accompanying drawings. However, the embodiments and drawings are for illustrative and explanatory purposes only and should not be used to define the scope of this invention. The scope of this invention is defined by the appended claims. This is a diagram illustrating a method for applying adhesive resin to the surface of a hook-and-loop fastener.

[0013] [Hook and Loop Fastener] The hook and loop fastener of the present invention will be described in detail below. The hook and loop fastener of the present invention comprises a base fabric with a first surface as the front side and a second surface as the back side, and a plurality of hook-shaped and / or loop-shaped engaging elements formed from threads for engaging elements that rise from the first surface of the base fabric and constitute a part of the base fabric. The threads for engaging elements are fixed within the base fabric by an adhesive resin.

[0014] In one embodiment, in a test using TG-DTA, the temperature at which the weight of the hook-and-loop fastener decreases by 0.5 wt% is 235°C or higher. The temperature at which the weight of the hook-and-loop fastener decreases by 0.5 wt% is preferably 260°C or higher, more preferably 300°C or higher, even more preferably 350°C or higher, and particularly preferably 370°C or higher. There is no particular upper limit, but it may be, for example, 450°C or lower.

[0015] In one embodiment, the temperature at which the weight of the hook-and-loop fastener decreases by 1.0 wt% in a test using TG-DTA is 264°C or higher. The temperature at which the weight of the hook-and-loop fastener decreases by 1.0 wt% is preferably 285°C or higher, more preferably 320°C or higher, even more preferably 360°C or higher, and particularly preferably 380°C or higher. The upper limit is not particularly limited, but may be, for example, 500°C or lower.

[0016] The hook-and-loop fastener satisfies at least one of the temperature ranges in which its weight decreases by 0.5 wt% and 1.0 wt%, and may satisfy both simultaneously. By suppressing the weight loss of the hook-and-loop fastener to at least the above temperature range, low smoke emission can be achieved even when the hook-and-loop fastener is used in a high-temperature environment, making it suitable for use in high-temperature environments. Here, the temperature at which the weight of the hook-and-loop fastener decreases by 0.5 wt% and 1.0 wt% is a value measured by the method described in the examples below.

[0017] The base fabric is not limited as long as the engaging elements can be made to protrude, and may be woven fabric, knitted fabric, nonwoven fabric, or a combination thereof.

[0018] For example, in the case of a woven fabric, in a woven fabric made from warp and weft threads composed of thermoplastic resin fibers, the threads for the engaging element may be woven into the fabric parallel to the warp threads, and after a predetermined number of weft threads have risen and fallen, the threads may straddle a predetermined number of warp threads, and the engaging element may be formed on the first surface of the woven fabric at the point where they straddle the warp threads. For example, it may be a loop fabric in which the threads for the engaging element rise in a loop shape from the first surface of the woven fabric base. Also, when the threads for the engaging element are woven into the fabric parallel to the warp threads, the frequency at which an engaging element is formed with respect to a predetermined number of weft threads may be one for every predetermined number of threads, for example, one engaging element may be formed every two weft threads (1 / 2 weave), every four weft threads (1 / 4 weave), every six weft threads (1 / 6 weave), or every eight weft threads (1 / 8 weave).

[0019] The warp threads preferably include multifilament yarns, for example, multifilament yarns consisting of 20 to 70 filaments with a total decitex (total fineness: T) of 80 to 300 decitex, or more preferably, multifilament yarns consisting of 24 to 60 filaments with a total decitex of 100 to 280 decitex. Here, the thickness (fineness) of the multifilament yarn refers to the thickness of the yarn used for weaving.

[0020] The weft yarn preferably contains multifilament yarn, for example, a multifilament yarn consisting of 20 to 70 filaments with a total decitex of 80 to 300 decitex, or more preferably a multifilament yarn consisting of 24 to 60 filaments with a total decitex of 100 to 280 decitex.

[0021] Multifilament yarns are preferable when they have a twist count of 0 to 20 T / m, a so-called untwisted yarn state, because this allows the heat-fusible yarn to function effectively and firmly fix the yarn for the engaging element to the woven fabric base.

[0022] The weave density of the warp threads in a hook-and-loop fastener may be, for example, 35 to 80 threads / cm, preferably 40 to 70 threads / cm. The weave density of the weft threads in a hook-and-loop fastener may be, for example, 14 to 24 threads / cm, preferably 15 to 22 threads / cm.

[0023] As the fiber forming the hook-shaped engaging element, a monofilament is preferable, and a monofilament having a diameter of 130 to 240 μm is more preferable. Further, as the fiber forming the loop-shaped engaging element, a multifilament yarn is preferable, for example, a multifilament yarn composed of 5 to 60 filaments and having a total decitex of 160 to 600 decitex is preferable.

[0024] In the case of a knitted fabric, in a knitted fabric (for example, a tricot knitted fabric) made of knitting yarns composed of thermoplastic resin fibers, the surface thereof may be raised by a card clothing or the like to form an engaging element. For example, it may be a loop base fabric in which the yarn for the engaging element stands up in a loop shape from the first surface of the knitted fabric base fabric.

[0025] As the knitting yarn, a multifilament yarn is preferable. For example, a multifilament yarn composed of 10 to 300 filaments and having a total decitex of 40 to 300 decitex, preferably a multifilament yarn composed of 20 to 250 filaments and having a total decitex of 50 to 280 decitex may be used. Here, the thickness (fineness) of the multifilament yarn is the thickness of the yarn used for knitting.

[0026] In the case of a non-woven fabric, a web formed of cut fibers composed of thermoplastic resin fibers may be entangled by needle punching or the like, and if necessary, the surface thereof may be raised to form an engaging element. Alternatively, in a spunbond non-woven fabric formed of long fibers composed of thermoplastic resin fibers, the surface thereof may be raised to form an engaging element. For example, it may be a loop base fabric in which the yarn for the engaging element stands up in a loop shape from the first surface of the non-woven fabric base fabric.

[0027] The length of the cut fibers may be, for example, 30 to 80 mm, preferably 40 to 70 mm. Further, the thickness of the cut fibers may be, as the single fiber fineness, for example, 1 to 50 decitex, preferably 1.5 to 40 decitex. Further, the thickness of the fibers constituting the spunbond non-woven fabric may be, as the single fiber fineness, for example, 1 to 50 decitex, preferably 1.5 to 40 decitex.

[0028] The base fabric may be composed of a single type of fiber or a plurality of types of fibers. From the viewpoint of improving the heat resistance of the surface fastener, the yarn constituting the base fabric and / or the yarn for the engaging element may be composed of heat-resistant fibers.

[0029] The yarn constituting the base fabric is preferably composed of thermoplastic resin fibers formed from a thermoplastic resin. Examples of the thermoplastic resin fibers include polyester-based fibers formed from polyester-based resins such as polyethylene terephthalate and polybutylene terephthalate; polyamide-based fibers formed from polyamide-based resins such as polyamide 6 and polyamide 6,6; polyphenylene sulfide-based fibers formed from polyphenylene sulfide-based resins; polyether ether ketone-based fibers formed from polyether ether ketone-based resins; polyether imide-based fibers formed from polyether imide-based resins; polyamide imide-based fibers formed from polyamide imide-based resins; liquid crystal polyester-based fibers formed from liquid crystal polyester-based resins; aramid-based fibers formed from aramid-based resins; polyarylate-based fibers formed from polyarylate-based resins, and the like. From the viewpoint of excellent heat resistance, polyphenylene sulfide-based fibers; polyether ether ketone-based fibers; polyether imide-based fibers; polyamide imide-based fibers; liquid crystal polyester-based fibers are preferable, and particularly, from the viewpoint of excellent flame retardancy, heat resistance, and insulation properties, polyphenylene sulfide-based fibers are preferable. Note that the thermoplastic resin fibers may be composite fibers, but non-composite fibers are preferable.

[0030] The adhesive resin is not particularly limited as long as it can fix the thread for the engaging element, and examples include thermoplastic resins such as polyurethane resins, acrylic resins (e.g., acrylic acid ester resins), polyvinyl chloride resins, vinyl acetate resins, styrene-butadiene resins, polyester resins, polyamide resins, polyolefin resins, and thermoplastic elastomers, as well as thermosetting resins such as crosslinked polyurethane resins, crosslinked acrylic resins, epoxy resins, unsaturated polyester resins, vinyl ester resins, crosslinked polyamide resins, methylolated melamine resins, phenolic resins, silicone resins, natural rubber, and isoprene rubber. These adhesive resins may be used alone or in combination of two or more. A resin having a crosslinked structure is a resin obtained by crosslinking molecules together, or by using a crosslinking agent monomer (e.g., isocyanate-based curing agent) to form a network structure through crosslinking between molecules.

[0031] The adhesive resin may be at least one selected from the group consisting of polyester resins, acrylic resins, crosslinked polyurethane resins, crosslinked acrylic resins, and silicone resins. Preferably, the adhesive resin is a resin with high heat resistance, but depending on the heat resistance required for the hook-and-loop fastener, crosslinked polyurethane resins or crosslinked acrylic resins can be used. In this case, adjustments can be made by adjusting the amount of resin applied to the base fabric or by using it in combination with heat-fusible fibers (sometimes called heat-fusible yarns). When the adhesive resin is provided as a back coat layer, the penetration of the resin into the base fabric can be promoted by applying a water-based emulsion to the base fabric and crosslinking it. The advantages of each resin include: polyester resins provide high water resistance and weather resistance; when polyester fibers are used in the base fabric, the affinity between the fibers and the adhesive resin increases, improving adhesion; acrylic resins do not require heat treatment, thus shortening the manufacturing process; and crosslinked polyurethane resins maintain a soft texture even after being made into a hook-and-loop fastener. Cross-linked acrylic resins can achieve high durability and weather resistance while enhancing heat resistance. Silicone resins can improve weather resistance, prevent yellowing at high temperatures, and increase tear strength. Furthermore, when polyester resins, acrylic resins, or silicone resins are used as adhesive resins, for example, in applications such as fasteners for insulation materials, such as heating jackets used in semiconductor manufacturing equipment, the rigidity of the hook-and-loop fastener allows the fastener portion to be kept flat. If wrinkles form in the fastener portion, air and heat will leak out, affecting the heating of pipes, etc., but because the fastener portion is flat, it can be bonded without leakage of air and heat, resulting in rapid temperature rise and heat retention effects. Bonding work is also easier.

[0032] The presence of adhesive resin can fill the gaps between the fibers of the hook-and-loop fastener, thereby adjusting its breathability. When the adhesive resin forms a continuous, planar layer, it can reduce the breathability of the hook-and-loop fastener. For example, in a heating jacket, this reduces heat and air leakage from the hook-and-loop fastener, promoting heating. When the adhesive resin is provided as a continuous, planar layer, the reduced breathability of the hook-and-loop fastener results in a higher thermal insulation effect.

[0033] The adhesive resin may exist in any form in the hook-and-loop fastener, as long as it can fix the threads for the engaging element within the base fabric. For example, heat-fusible threads may be included in the base fabric along with the threads that mainly constitute the base fabric (for example, warp and weft threads in the case of a woven base fabric), and the molten material of the heat-fusible threads may act as the adhesive resin to fix the threads for the engaging element within the base fabric. Alternatively, an adhesive resin having continuous planar portions, achieved by applying a back coat resin or laminating a resin film, may fix the threads for the engaging element within the base fabric. These adhesive resins may also be combined.

[0034] When the adhesive resin contains molten heat-fusible yarn, the heat-fusible yarn may be included as yarn constituting the base fabric. For example, in the case of a woven base fabric, the heat-fusible yarn may be woven as warp and / or weft yarns constituting the base fabric and melted by heat treatment. The heat-fusible yarn may be a composite fiber such as a core-sheath composite fiber in which the sheath component softens at a lower temperature than the core component, but it is preferable that it be a non-composite fiber that can be softened and fused as a whole. When a non-composite fiber is used as the heat-fusible yarn, the gaps between the fibers can be filled, which can reduce the air permeability of the resulting hook-and-loop fastener and improve the heat insulation effect. The heat-fusible yarn may be a yarn containing polyester resin, polyamide resin, polyolefin resin, etc., and from the viewpoint of heat resistance and low smoke emission, the heat-fusible yarn may contain polyester resin.

[0035] The adhesive resin may have continuous planar portions. In this invention, continuous planar portions refer to portions formed continuously within and / or on the surface of the base fabric. The continuous planar portions do not need to extend over the entire interior and / or surface of the base fabric; as long as the effects of the present invention are achieved, there may be areas that are not partially coated, or the adhesive resin may have irregularities corresponding to the shape of the base fabric.

[0036] From the viewpoint of increasing the area in contact with the yarn and improving adhesion, it is preferable that the adhesive resin penetrates at least a portion of the base fabric. In this case, the adhesive resin may have a continuous planar portion, and may also penetrate into the interior of the base fabric depending on the shape of the base fabric. In the portion that penetrates into the interior of the base fabric, the adhesive resin may have a portion that penetrates further into the interior of the base fabric from the continuous planar portion.

[0037] These adhesive resins may be adhesive resins that are melted and directly applied to the second surface of the base fabric. Alternatively, they may be adhesive resins that are applied to the second surface of the base fabric by applying a back coat solution, which is a solution or dispersion of the adhesive resin with a diluent appropriate for the adhesive resin.

[0038] When incorporating adhesive resin by applying a molten adhesive resin, the adhesive resin is preferably a thermoplastic resin, and more preferably polyester resins, acrylic resins, polyurethane resins, polyamide resins, and polyolefin resins. From the viewpoint of raising the weight loss temperature of the hook-and-loop fastener, polyester resins and acrylic resins may be even more preferred thermoplastic resins.

[0039] When an adhesive resin is incorporated by applying a back coat liquid, the adhesive resin is preferably a thermosetting resin, and more preferably a crosslinked polyurethane resin, a crosslinked acrylic resin, an unsaturated polyester resin, a vinyl ester resin, a methylolated melamine resin, or a silicone resin. From the viewpoint of raising the weight loss temperature of the hook-and-loop fastener, even more preferable thermosetting resins may be a crosslinked acrylic resin or a silicone resin.

[0040] The content of the adhesive resin can be appropriately determined depending on the type of resin used. From the viewpoint of controlling the fume generation of the adhesive resin, the content of the adhesive resin can be, for example, 0.1 to 25 g / m when applying a molten adhesive resin. ２ Preferably 0.5 to 20 g / m ２ More preferably 1.0 to 15 g / m ２ This may also be the case. From the viewpoint of controlling the permeability of the adhesive resin, the content of the adhesive resin may be, for example, 10 to 400 g / m when applying a molten adhesive resin. ２ Preferably 15 to 360 g / m² ２ More preferably 20 to 340 g / m² ２ That's fine.

[0041] The adhesive resin may contain various additives as needed. Examples of additives include flame retardants, heat stabilizers, antioxidants, antistatic agents, color inhibitors, matting agents, radical inhibitors, colorants, fluorescent whitening agents, and antibacterial agents.

[0042] Examples of flame retardants include halogen-based flame retardants, phosphorus-based flame retardants, silicon-based flame retardants, and nitrogen-based flame retardants, which may be used individually or in combination of two or more.

[0043] Examples of halogen-based flame retardants include chlorinated paraffin, chlorinated polyethylene, bromine-containing acrylic resins, bromine-containing styrene resins, bromine-containing epoxy compounds, bromine-containing aryl ether compounds, bromine-containing aromatic imide compounds, and brominated bisaryl compounds. Among these, brominated bisaryl compounds are preferred, and 1,2-bis(pentabromophenyl)ethane is particularly preferred. Furthermore, halogen-based flame retardants (especially brominated flame retardants) are preferably used in combination with antimony trioxide. Commercially available antimony trioxide can be used as is, and those with a particle size of 0.3 to 2 μm are preferred.

[0044] Examples of phosphorus-based flame retardants include triphenyl phosphate, tricresyl phosphate, cresyl diphenyl phosphate, trixylenyl phosphate, cresyl di-2,6-xylenyl phosphate, 2-ethylhexyl diphenyl phosphate, trimethyl phosphate, triethyl phosphate, tris(2-ethylhexyl) phosphate, resorcinol bis(diphenyl phosphate), bisphenol A bis(diphenyl phosphate), resorcinol bis(di-2,6-xylenyl phosphate), tris(chloroethyl) phosphate, and tris(chloropropyl Examples include phosphate ester compounds such as propyl phosphate and tris(dichloropropyl) phosphate; phosphate ester amide compounds; phosphonic acid ester compounds such as dimethylmethylphosphonate, dimethylvinylphosphonate, diethylvinylphosphonate, and diphenylvinylphosphonate; phosphinic acid metal salt compounds such as diethylphosphinate metal salt; phosphazene compounds; red phosphorus; phosphate compounds such as ammonium phosphate, guanidine phosphate, guanylurea phosphate, and melamine phosphate; and polyphosphate compounds such as ammonium polyphosphate and melamine polyphosphate.

[0045] Examples of silicon-based flame retardants include silicone compounds.

[0046] Examples of nitrogen-based flame retardants include guanidine compounds such as guanidine sulfamate; triazine compounds such as melamine sulfate, melamine cyanurate, melam, and melem; hindered amine compounds; and azoalkane compounds.

[0047] For example, by selecting a flame retardant that matches the fibers constituting the base fabric, the flame retardancy of the hook-and-loop fastener can be efficiently improved. Examples include halogen-based flame retardants, phosphorus-based flame retardants, and nitrogen-based flame retardants, which may be used individually or in combination of two or more.

[0048] From the perspective of suppressing smoke generation, the content of the flame retardant is preferably 20% by weight or less based on the weight of the surface fastener. The lower limit is not particularly limited, but it may be, for example, 0.5% by weight or more. When the surface fastener contains a flame retardant, it is conceivable that the flame retardant decomposes in a high-temperature environment, resulting in smoke generation and a gradual decrease in flame retardancy. However, when the content of the flame retardant in the surface fastener is below a specific amount, smoke generation can be suppressed and the flame retardancy can also be maintained.

[0049] The engaging elements may be formed entirely on the first surface of the base fabric. Alternatively, the base fabric may have ears in the length direction and / or width direction on the first surface. Here, the ear means a region where no engaging element exists and is adjacent to the region where the engaging element exists. The ears may be present at both ends and / or inside of the surface fastener.

[0050] In the surface fastener, the height of the hook-shaped engaging element, as the height protruding from the first surface of the base fabric, may be, for example, 1.2 to 2.5 mm, preferably 1.4 to 2.3 mm. Also, the height of the loop-shaped engaging element, as the height protruding from the first surface of the base fabric, may be, for example, 1.2 to 3.0 mm, preferably 1.5 to 2.7 mm. Here, the height of the engaging element is a value measured by the method described in the examples below.

[0051] For the density of the hook-shaped engaging elements in the hook surface fastener, based on the base fabric portion where the engaging elements exist, it is 30 to 70 pieces / cm ２ , for the density of the loop-shaped engaging elements in the loop surface fastener, based on the same standard, it is 30 to 70 pieces / cm ２ , for the total density of the hook-shaped engaging elements and the loop-shaped engaging elements in the hook-loop coexisting type surface fastener, based on the same standard, it is 30 to 70 pieces / cm ２ is preferred. And in the hook-loop coexisting type surface fastener, the ratio of the number of hook-shaped engaging elements to the number of loop-shaped engaging elements is preferably in the range of 40:60 to 60:40. Here, the base fabric portion standard is based on the unit area of the base fabric of the surface fastener in the state where the adhesive resin is applied.

[0052] The hook-and-loop fastener may have a smoke concentration (Ds) of less than 27.5 in the flameless test according to ASTM E662. The smoke concentration may preferably be less than 19.0, and more preferably less than 10.0. Here, the smoke concentration is the value measured by the method described in the examples below. Furthermore, because the hook-and-loop fastener has low biodegradability, it is less likely to yellow or discolor even when used in high-temperature environments.

[0053] The dimensional change rate in at least one of the longitudinal and width directions (preferably the longitudinal direction, more preferably the longitudinal and width directions) of the hook-and-loop fastener after exposure to 200°C for 24 hours may be preferably 4.5% or less, more preferably 3.5% or less, and particularly preferably 2.5% or less. Here, the dimensional change rate is a value measured by the method described in the examples later.

[0054] Furthermore, from the viewpoint of accurately understanding the rate of dimensional change, the width of the hook-and-loop fastener may be, for example, 20 mm or more, preferably 25 mm or more, and more preferably 30 mm or more. There is no particular upper limit to the width of the hook-and-loop fastener, but it may be, for example, 300 mm or less. Also, for example, when used as a fastener for a heating jacket, the width of the hook-and-loop fastener may be, for example, 20 mm or more, preferably 25 mm or more, and more preferably 30 mm or more, due to synergistic effects such as suppressing wrinkles and gaps and stabilizing the heat retention and heating effect. By setting it to 20 mm or more, the engagement area can be secured and the stability of the heat retention and heating effect can be improved. Note that the width of the hook-and-loop fastener is the width measured with respect to the base fabric, and if there is an edge portion, which will be described later, the edge portion is also included.

[0055] [Method for Manufacturing Hook and Loop Fasteners] Hook and loop fasteners can be obtained by performing the following steps B and D, and optionally step C. The order of the steps is as follows: if step C is not performed, steps B and D are performed; if step C is performed, steps B, C and D are performed. Alternatively, step A may be performed before step B.

[0056] (Process A) In Process A, a loop base fabric, formed from thermoplastic resin fibers and with threads for the engaging element rising in a loop shape from the first surface of the base fabric, is subjected to a heat treatment under tension at a temperature of Tg + 15°C or higher, which is the glass transition temperature of the thermoplastic resin fiber with the highest glass transition temperature among the thermoplastic resin fibers constituting the loop base fabric.

[0057] As described above, the loop base fabric can be formed by causing threads for the engaging element to protrude in a loop shape from the first surface of a base fabric, which may be a woven fabric, knitted fabric, nonwoven fabric, etc. The thermoplastic resin fibers can be those described above. From the viewpoint of suppressing smoke generation, polyphenylene sulfide fibers are preferred. In the case of woven or knitted fabrics, it is preferable to apply an oil to the threads or fibers constituting the base fabric from the viewpoint of improving weaving and knitting properties, and in the case of nonwoven fabrics, from the viewpoint of improving entanglement properties.

[0058] Prior to fixing the threads for the engaging elements with adhesive resin, the obtained loop base fabric may be subjected to a heat treatment process. As described above, in the heat treatment process, the loop base fabric is heated under tension at a temperature of Tg + 15°C or higher, which is the glass transition temperature Tg of the thermoplastic resin fiber with the highest glass transition temperature among the thermoplastic resin fibers constituting the loop base fabric. The glass transition temperature of the thermoplastic resin fiber can be measured using a differential scanning calorimeter (Mettler TA3000-DSC) under a nitrogen atmosphere by raising the temperature to 400°C at a heating rate of 50°C / min. The glass transition temperature is defined as the inflection point on the DSC chart and can be calculated in accordance with JIS K 7121:2012.

[0059] By performing a heat treatment process, shrinkage of the loop base fabric can be suppressed even when the hook-and-loop fastener is exposed to high temperatures of approximately 200°C during use. Furthermore, the shape of the hook-shaped engaging element can be maintained, thereby suppressing a decrease in the engaging force.

[0060] The heating temperature in the heat treatment step may be a temperature of glass transition temperature Tg + 15°C or higher, preferably Tg + 50°C or higher, more preferably Tg + 70°C or higher, and even more preferably Tg + 100°C or higher. The upper limit is not particularly limited as long as it is below the melting point when the thermoplastic resin fibers are formed from a crystalline thermoplastic resin such as polyphenylene sulfide resin (PPS), but for example it may be Tg + 180°C or lower.

[0061] Furthermore, the processing time for the heat treatment may be, for example, 30 to 120 seconds, preferably 35 to 100 seconds, and more preferably 40 to 90 seconds.

[0062] When heat treatment is performed on the loop base fabric in a continuous manner, for example, the tension applied to the loop base fabric may be, for example, 50 to 600 g / cm, preferably 80 to 580 g / cm, and more preferably 100 to 550 g / cm. The direction in which the tension is applied is not particularly limited and may be in the direction of machine movement (length direction of the loop base fabric), in a direction perpendicular to the direction of machine movement (width direction of the loop base fabric), or both. Applying tension to the loop base fabric during the above process is preferable because it not only suppresses the waviness of the loop base fabric when adhesive resin is applied in process B, thereby improving the passability through the process, but also suppresses excessive shrinkage, ensures that there is space for the adhesive resin to penetrate, improves the passability of the loop base fabric during aging treatment, and is also preferable because it can prevent shrinkage and surface waviness of the hook-and-loop fastener when the hook-and-loop fastener is used at high temperatures of about 200°C. When the thermoplastic resin fibers constituting the base fabric are made of crystalline thermoplastic resin, performing the heat treatment process at the above tension can make the crystallinity of not only the threads for the hook-and-loop fastener's engaging element but also the thermoplastic resin fibers constituting the base fabric 25 to 60%, more preferably 30 to 55%, and even more preferably 35 to 50%, which can contribute to suppressing shrinkage and maintaining shape at high temperatures.

[0063] (Step B) In Step B, the threads for the engaging element are fixed into the base fabric with an adhesive resin. The fixing of the threads for the engaging element with the adhesive resin can be carried out as appropriate depending on the form of the adhesive resin. For example, if the threads constituting the loop base fabric include heat-fusible threads, the loop base fabric may be heated to a temperature of 15°C or higher above the melting point or glass transition temperature of the thermoplastic resin constituting the heat-fusible threads, and then the molten heat-fusible threads may be cooled and solidified so that the molten material of the heat-fusible threads acts as an adhesive resin and fixes the threads for the engaging element into the base fabric.

[0064] If the base fabric does not include heat-fusible yarn as part of it, or if the base fabric contains molten heat-fusible yarn, in addition to the molten heat-fusible yarn, an adhesive resin may be applied to the back surface of the loop base fabric to fix the threads for the engaging element within the base fabric. For example, as shown in Figure 1, while the molten adhesive resin is extruded in layers from the T-die (T) onto the second surface of the base fabric (10), the first surface side of the base fabric is pressed down by a press roll (R ２ ) comes into contact with the cooling roll (R １ ) in contact with the press roll (R ２ ) and cooling roll (R １ Alternatively, by running the device between the base fabric (10) and the adhesive resin (6), the molten adhesive resin (6) may be allowed to penetrate into the base fabric from the second surface of the base fabric (10), integrating the two and fixing the threads for the engaging element present in the base fabric. Alternatively, a film containing a thermoplastic resin as the adhesive resin may be placed on the second surface of the base fabric, and the adhesive resin may be melted and pressed together using a hot roll, allowing the molten adhesive resin to penetrate into the base fabric from the second surface of the base fabric, integrating the two and fixing the threads for the engaging element present in the base fabric.

[0065] Furthermore, when using a back coat liquid prepared as a solution or dispersion with a diluent appropriate to the adhesive resin (for example, water, alcohols, esters, ethers, surfactants, emulsifiers, etc.), the threads for the engaging elements present within the base fabric may be fixed within the base fabric by applying or spraying the back coat liquid onto the second surface of the loop base fabric.

[0066] When applying a backcoat liquid, the applied adhesive resin is dried. The drying temperature can be appropriately set depending on the type of adhesive resin and the type of diluent, but for example, the drying temperature may be 40 to 150°C, preferably 50 to 130°C, and more preferably 60 to 120°C. The drying time can be appropriately set depending on the drying temperature, for example, 30 seconds to 5 minutes, preferably 50 seconds to 4 minutes, and more preferably 1 to 3 minutes.

[0067] In addition to the drying process, or as an alternative to the drying process, an aging treatment may be performed as needed. By performing the aging treatment, moisture can be removed, promoting crosslinking of the thermosetting resin and allowing it to harden. The conditions for the aging treatment may be, for example, an atmosphere of 40 to 120°C, preferably 50 to 110°C, for 2 to 24 hours, preferably 6 to 18 hours. By performing the heat treatment at such heating temperatures, impurities such as diluents and solvents can be removed from the back coat liquid, for example, resulting in a back coat layer with low decomposition properties. The aging treatment may be performed separately after the hardening of the thermosetting resin, or it may be performed simultaneously with the hardening of the thermosetting resin.

[0068] (Step C) If the hook-and-loop fastener has a hook-shaped engaging element, one leg of the loop of the loop base fabric is cut to make the loop a hook-shaped engaging element. The cutting of one leg of the loop can be done by a known or conventional method.

[0069] (Process D) Following Process B or Process C, the obtained hook-and-loop fasteners are scouring. By performing the scouring process, impurities can be removed from the hook-and-loop fasteners. The conditions for the scouring process are not particularly limited as long as the temperature at which the weight of the hook-and-loop fasteners decreases by 0.5 wt% in a test using TG-DTA is 235°C or higher. For example, by adding 0.5 to 5 g / L of synthetic fiber continuous scouring agent to the scouring machine, scouring at a bath ratio of 1:10 to 1:20, a temperature of 70 to 100°C, and a processing time of 10 minutes to 1 hour, oils and other substances adhering to the hook-and-loop fasteners can be removed.

[0070] The hook-and-loop fastener of the present invention is less likely to produce smoke even when used in high-temperature environments (e.g., 200°C or higher), and can therefore be used in a wide range of fields, including vehicles such as automobiles, aircraft, and trains; special clothing such as fire-resistant clothing, firefighter suits, and high-temperature work clothes; and industrial materials such as insulation materials and building materials.

[0071] The present invention will be described in more detail below based on examples, but the present invention is not limited thereto. In the following examples and comparative examples, various physical properties were measured by the methods described below.

[0072] (Engagement Force) The engagement force of the obtained samples was measured according to JIS L 3416-2000, specifically by determining the tensile shear strength and peel strength.

[0073] (Height of engaging element from the base fabric surface) For the height of the engaging element from the base fabric surface of the obtained sample, the distance from the base of the engaging element on the first surface of the base fabric to the top of the engaging element was measured. Measurements were taken for 10 randomly selected engaging elements, and the average was calculated.

[0074] (Decomposition Temperature / TG-DTA) Thermogravimetric analysis (TG) and differential thermal analysis (DTA) were performed on a 10 mg sample of hook-and-loop fastener using a Rigaku Thermo Plus-EVO2 differential thermogravimetric analyzer (TG-DTA) under conditions of an air atmosphere, a flow rate of 50 mL / min, and a temperature increase from room temperature to 500 °C at a rate of 10 °C / min. The temperature at which the specified decomposition amount occurred was determined from the results of the thermogravimetric analysis (TG).

[0075] (Flame Retardancy) The flame retardancy was measured according to the vertical flame retardancy test method [14 CFR PART25 Sec25.853(a)]. Specifically, the hook-and-loop fastener was mounted on a U-shaped jig in a combustion test machine so that the exposed surface was 5.08 cm wide x 30.48 cm long. The sample was then held vertically, and a hand burner was applied from below for 12 seconds to observe the combustion state. The time from when the burner was removed until the material self-extinguished (self-extinguishing time) was measured. Five measurements were taken, and the average value was calculated. In addition, the hook-and-loop fastener was exposed to a 200°C atmosphere for 24 hours under stress-free conditions, and the same vertical flame retardancy test was performed using that sample.

[0076] (Smoke emission status) A roll of hook-and-loop fastener was placed on a hot plate, and the presence or absence of smoke was visually evaluated over a 10-minute period at a hot plate surface temperature of 200°C.

[0077] (Smoke Concentration) Following the ASTM E 662 flameless test, a sample of hook-and-loop fastener with standard dimensions of 76.2 mm x 76.2 mm (3 inches x 3 inches) was prepared. The sample was securely fixed in a sample holder and positioned so that the entire surface of the sample received uniform radiant heat. Four minutes after the start of the test, the smoke concentration (DS) in the chamber was measured. Three measurements were taken, and the average was calculated. This test is important for evaluating the smoke-generating properties of materials and is used particularly in the fire safety evaluation of building materials and aircraft materials.

[0078] (Dimensional change rate) The dimensional change rate was calculated by adjusting the obtained samples and performing calculations based on JIS L 1096:2010 (Test method for woven and knitted fabrics) and JIS L 1909:2010 (Measurement method for dimensional change of textile products). The hook-and-loop fastener used as a sample was prepared to be 25 mm wide x 1 m long, heated for 24 hours in a baking machine (industrial constant temperature oven) at a set temperature of 200°C, and then removed. The dimensional change rate (%) of the sample was calculated using the following formulas: Dimensional change rate (length) = (Length before heating - Length after heating) / (Length before heating) × 100 Dimensional change rate (width) = (Width before heating - Width after heating) / (Width before heating) × 100 For convenience, the hook-and-loop fastener used as a sample was prepared to be 25 mm wide x 1 m long, but the width and length are not particularly limited as long as they are measurable.

[0079] (Example 1) The following yarns were prepared as the warp, weft, and hook-shaped engaging element yarns that make up the base fabric of the hook fastener. [Warp] Multifilament yarn made of PPS, total decitex and number of filaments: 250 dtex and 60 filaments. Here, the glass transition temperature of PPS (polyphenylene sulfide) is 90°C, which is common to the following yarns.

[0080] [Weft yarn (untwisted and combined yarn of the following three types of multifilament yarns)] (1) Multifilament yarn made of PPS - total decitex and number of filaments: 250 dtex and 60 filaments (2) Multifilament yarn made of polyethylene terephthalate - total decitex and number of filaments: 70 dtex and 24 filaments (3) Multifilament yarn made of 25 mol% isophthalic acid copolymerized polyethylene terephthalate (softening point: 190°C) - total decitex and number of filaments: 30 dtex and 24 filaments Note that the glass transition temperature of polyethylene terephthalate is 75°C, and the glass transition temperature of 25 mol% isophthalic acid copolymerized polyethylene terephthalate is 60°C, and these are common to the following yarns.

[0081] [Thread for hook-shaped engagement element] Monofilament thread made of PPS; diameter (before heat shrinkage): 200 μm

[0082] [Manufacturing of hook-and-loop fasteners] Using the above warp threads, weft threads, and threads for the hook-shaped engaging elements, a plain weave structure was used, and the initial weave density was set to 47 warp threads / cm and 15.4 weft threads / cm. The threads for the hook-shaped engaging elements were woven parallel to the warp threads at a ratio of one thread for every four warp threads, and after one weft thread was raised and lowered, it crossed over one warp thread to form a loop.

[0083] The hook-and-loop fastener tape woven under the above conditions was heat-treated by running it through a 255°C heat treatment furnace for 60 seconds (tension of 200 g / cm in the length direction), thereby performing heat treatment on the warp threads, weft threads, and threads for the hook-shaped engaging elements.

[0084] Next, using a cutting device that cuts between two fixed blades by the reciprocating motion of a movable cutting blade, one leg of the loop for the hook-shaped engaging element was cut to form the hook-shaped engaging element. The element density was 63 elements / cm². ２ That was the case.

[0085] Subsequently, the material was scouring using a commonly used high-pressure dyeing machine for textiles under the following scouring conditions. The physical properties of the resulting hook fasteners are shown in Table 1.

[0086] [Scouring Conditions] Auxiliary agent: Sanmol 120 (manufactured by Nikka Chemical Co., Ltd.) 1 g / L Bath ratio: 1:15 Temperature: 85°C Time: 15 minutes Drying: 60°C x 30 minutes

[0087] (Example 2) The following yarns were prepared as the warp, weft, and loop-shaped engaging element yarns that make up the base fabric of the loop fastener. [Warp] Multifilament yarn made of PPS, total decitex and number of filaments: 250 dtex and 60 filaments

[0088] [Weft yarn (untwisted and combined yarn of the following three types of multifilament yarns)] (1) Multifilament yarn made of PPS - total decitex and number of filaments: 250 dtex and 60 filaments (2) Multifilament yarn made of polyethylene terephthalate - total decitex and number of filaments: 70 dtex and 24 filaments (3) Multifilament yarn made of 25 mol% isophthalic acid copolymer polyethylene terephthalate (softening point: 190°C) - total decitex and number of filaments: 30 dtex and 24 filaments

[0089] [Thread for loop-shaped engagement element] Multifilament thread made of PPS; total decitex and number of filaments: 334 dtex, 20 strands

[0090] [Manufacturing of Loop Hook Fasteners] Using the above warp threads, weft threads, and loop-shaped engaging element threads, a plain weave structure was used, and the initial weave density was 47 warp threads / cm and 16.1 weft threads / cm. Loop-shaped engaging element threads were woven parallel to the warp threads at a ratio of one thread for every four warp threads, and after one weft thread was raised and lowered, it was made to cross over one warp thread to form a loop.

[0091] The loop hook-and-loop fastener tape woven under the above conditions was heat-treated by running it through a 255°C heat treatment furnace for 60 seconds (tension of 200 g / cm in the length direction), and the warp threads, weft threads, and loop-shaped engaging element threads were heat-treated. The element density was 65 elements / cm². ２ That was the case.

[0092] Subsequently, the material was scouring under the same conditions as in Example 1 using a commonly used high-pressure dyeing machine for textiles. The physical properties of the resulting loop fasteners are shown in Table 1.

[0093] Furthermore, various engagement forces were measured by combining the hook fastener obtained in Example 1 and the loop fastener obtained in Example 2.

[0094] (Example 3) The following threads were prepared as the warp threads, weft threads, and threads for the hook-shaped engaging elements that make up the base fabric of the hook fastener. [Warp threads] Multifilament thread made of polyethylene terephthalate, total decitex and number of filaments: 167 dtex, 30 threads

[0095] [Weft yarn (two strands of the following type of multifilament yarn, untwisted)] Multifilament yarn consisting of core-sheath type composite filaments - Core component: polyethylene terephthalate - Sheath component: 25 mol% isophthalic acid copolymerized polyethylene terephthalate (softening point: 190°C) - Core-sheath ratio (weight ratio): 70:30 - Total decitex and number of filaments: 24 filaments at 99 dtex

[0096] [Thread for hook-shaped engagement element] Monofilament thread made of polyethylene terephthalate; diameter (before heat shrinkage): 180 μm

[0097] [PET resin integrated into the back of the hook-and-loop fastener] A resin made of copolymerized PET (copolymerization ratio: 18 mol% isophthalic acid (IPA) copolymerized) ・Melting point: 192°C

[0098] [Manufacturing of hook-and-loop fasteners] Using the above warp threads, weft threads, and threads for the hook-shaped engaging elements, a plain weave structure was used, and the initial weave density was set to 50 warp threads / cm and 16.5 weft threads / cm. The threads for the hook-shaped engaging elements were woven parallel to the warp threads at a ratio of one thread for every four warp threads, and after one weft thread was raised and lowered, it was made to cross three warp threads to form a loop.

[0099] The woven tape for hook fasteners, woven under the above conditions, is cooled by a cooling roll (R) as shown in Figure 1. １ ) and press roll (R ２ The machine was driven between the two dies. Meanwhile, the PET resin described above was heated and melted to 205°C and extruded in layers from the T-die (T) (resin layer (6)), and while the resin remained molten at 205°C, a cooling roll (R) was used.１ ) and press roll (R ２ A resin layer (6) was pressed onto the back side of the hook-and-loop fastener woven tape (10) as it was running between the two, thereby integrating the two. On the surface of the cooling roll, 18.5 needle-like protrusions were made per cm so that holes (7) with a diameter of 50 to 500 μm were formed that penetrate from the back to the front of the resin layer (6). ２ It was provided at the following density. The average thickness of the resin layer (6) was 50 μm, and the basis weight was 63 g / m². ２ That was the case.

[0100] Cooling roll (R １ The integrated material was run along the roll surface of the sweeper roll (R) to cool and solidify the resin layer (6). Subsequently, the woven tape for hook fasteners with a PET resin layer (6) integrated on the back side was run along the sweeper roll (R) ４ By aligning it along the surface, the cooling roll (R １ It was peeled off the surface.

[0101] The obtained hook-and-loop fastener tape was heat-treated by running it through a 210°C heat treatment furnace for 60 seconds (tension of 200 g / cm in the longitudinal direction), and the warp threads, weft threads, and threads for the hook-shaped engaging elements were heat-treated.

[0102] Next, using a cutting device that cuts between two fixed blades by the reciprocating motion of a movable cutting blade, one leg of the loop for the hook-shaped engaging element was cut to form the hook-shaped engaging element. The element density was 42 / cm². ２ That was the case.

[0103] Subsequently, the material was scouring under the same conditions as in Example 1 using a commonly used high-pressure dyeing machine for textiles. The physical properties of the resulting hook fasteners are shown in Table 1.

[0104] (Example 4) The following yarns were prepared as the warp, weft, and loop-shaped engaging element yarns that make up the base fabric of the loop fastener. [Warp] Multifilament yarn made of polyethylene terephthalate, total decitex and number of filaments: 167 dtex, 30 filaments

[0105] [Weft yarn (two strands of the following type of multifilament yarn, untwisted)] Multifilament yarn consisting of core-sheath type composite filaments - Core component: polyethylene terephthalate - Sheath component: 25 mol% isophthalic acid copolymerized polyethylene terephthalate (softening point: 190°C) - Core-sheath ratio (weight ratio): 70:30 - Total decitex and number of filaments: 24 filaments at 99 dtex

[0106] [Thread for loop-shaped engagement element] Multifilament thread made of polyethylene terephthalate; total decitex and number of filaments: 289 dtex, 8 strands [PET resin to be integrated into the back of the hook-and-loop fastener] Resin made of copolymerized PET (copolymerization ratio: 18 mol% IPA copolymerized) Melting point: 192°C

[0107] [Manufacturing of Loop Hook Fasteners] Using the above warp threads, weft threads, and loop-shaped engaging element threads, a plain weave was used as the weaving structure, and the initial weaving density was set to 50 warp threads / cm and 18.9 weft threads / cm. Loop-shaped engaging element threads were woven parallel to the warp threads at a ratio of one thread for every four warp threads, and after one weft thread was raised and lowered, a loop was formed without crossing the warp threads.

[0108] Using the obtained loop base fabric, a woven tape for hook-and-loop fasteners with an integrated PET resin layer was manufactured in the same manner as in Example 3.

[0109] The resulting loop hook-and-loop fastener tape was heat-treated by running it through a 210°C heat treatment furnace for 60 seconds (tension of 200 g / cm in the longitudinal direction), and the warp threads, weft threads, and loop-shaped engaging element threads were heat-treated. The element density was 45 elements / cm². ２ That was the case.

[0110] Subsequently, the material was scouring under the same conditions as in Example 1 using a commonly used high-pressure dyeing machine for textiles. The physical properties of the resulting loop fasteners are shown in Table 1.

[0111] Furthermore, various engagement forces were measured by combining the hook fastener obtained in Example 3 and the loop fastener obtained in Example 4.

[0112] (Example 5) A urethane polymer liquid containing a brominated compound (KMN-NO3 manufactured by Nikka Chemical Co., Ltd.) was coated with a back coat liquid containing a phosphorus-based flame retardant, dried at 120°C for 5 minutes, and then aged at 85°C for 9 hours, with 10 g / m² applied to the back surface. ２ A hook-and-loop fastener was manufactured in the same manner as in Example 1, except that a layer made of polyurethane was formed. The element density was 63 elements / cm². ２ The physical properties of the resulting hook fasteners are shown in Table 1.

[0113] Furthermore, various engagement forces were measured by combining the hook fastener obtained in Example 5 and the loop fastener obtained in Example 2.

[0114] (Comparative Example 1) The following threads were prepared as the warp threads, weft threads, and threads for the hook-shaped engaging elements that constitute the base fabric of the hook fastener. [Warp threads] Multifilament thread made of PPS, total decitex and number of filaments: 220 dtex, 50 threads

[0115] [Weft] Multifilament yarn made of PPS, total decitex and number of filaments: 220 dtex with 50 filaments

[0116] [Thread for hook-shaped engagement element] Monofilament thread made of PPS; diameter (before heat shrinkage): 200 μm

[0117] [Manufacturing of hook-and-loop fasteners] Using the above warp threads, weft threads, and threads for the hook-shaped engaging elements, a plain weave structure was used, and the initial weave density was set to 46 warp threads / cm and 15.2 weft threads / cm. The threads for the hook-shaped engaging elements were woven parallel to the warp threads at a ratio of one thread for every four warp threads, and after one weft thread was raised and lowered, it was made to cross over one warp thread to form a loop.

[0118] The hook-and-loop fastener tape woven under the above conditions was scouring using a commonly used high-pressure dyeing machine for textiles under the same scouring conditions as in Example 1.

[0119] For the manufacture of flame-retardant hook-and-loop fasteners with adhesive properties, a back coat liquid containing a phosphorus-based flame retardant is applied to the back of the hook-and-loop fastener tape. This liquid is a urethane polymer solution containing a brominated compound (KMN-NO3, manufactured by Nikka Chemical Co., Ltd.), which is then dried at 140°C for 90 seconds, followed by aging treatment at 85°C for 9 hours. The back surface is then coated with 50 g / m² of material. ２ A hook-and-loop fastener was formed having a layer made of polyurethane.

[0120] Next, using a cutting device that cuts between two fixed blades by the reciprocating motion of a movable cutting blade, one leg of the loop for the hook-shaped engaging element was cut to form the hook-shaped engaging element. The element density was 52 elements / cm². ２ The physical properties of the resulting hook fasteners are shown in Table 1.

[0121] (Comparative Example 2) The following yarns were prepared as the warp, weft, and loop-shaped engaging element yarns that make up the base fabric of the loop hook-and-loop fastener. [Warp] Multifilament yarn made of PPS, total decitex and number of filaments: 220 dtex and 50 filaments

[0122] [Weft] Multifilament yarn made of PPS, total decitex and number of filaments: 220 dtex with 50 filaments

[0123] [Yarn for loop-shaped engagement element (two untwisted strands of the following type of multifilament yarn)] Multifilament yarn made of PPS, total decitex and number of filaments: 50 strands at 220 dtex

[0124] [Manufacturing of Loop Hook Fasteners] Using the above warp threads, weft threads, and loop-shaped engaging element threads, a plain weave structure was used, and the initial weave density was set to 46 warp threads / cm and 17.8 weft threads / cm. Loop-shaped engaging element threads were woven parallel to the warp threads at a ratio of one thread for every four warp threads. After one weft thread was raised and lowered, a loop was formed by crossing three weft threads and three warp threads.

[0125] The loop hook-and-loop fastener tape woven under the above conditions was scouring using a commonly used high-pressure dyeing machine for textiles under the same scouring conditions as in Example 1.

[0126] A layer of urethane was applied to the back surface of the loop fastener tape obtained under the above conditions, under the same conditions as in Comparative Example 1, with a layer of 50 g / m² applied to the back surface. ２ A hook-and-loop fastener was formed having a layer made of polyurethane. The element density of the obtained hook-and-loop fastener was 60 elements / cm². ２ The physical properties of the resulting loop fasteners are shown in Table 1.

[0127] Furthermore, various engagement forces were measured by combining the hook fastener obtained in Comparative Example 1 and the loop fastener obtained in Comparative Example 2.

[0128] (Comparative Example 3) The following yarns were prepared as the warp, weft, and hook-shaped engaging element yarns that make up the base fabric of the hook fastener. [Warp] Multifilament yarn made of polyethylene terephthalate, total decitex and number of filaments: 30 filaments at 167 dtex

[0129] [Weft yarn (two strands of the following type of multifilament yarn, untwisted)] Multifilament yarn consisting of core-sheath type composite filaments - Core component: polyethylene terephthalate - Sheath component: 25 mol% isophthalic acid copolymerized polyethylene terephthalate (softening point: 190°C) - Core-sheath ratio (weight ratio): 70:30 - Total decitex and number of filaments: 24 filaments at 99 dtex

[0130] [Yarn for hook-shaped engagement element] Monofilament yarn made of polyethylene terephthalate, diameter (before heat shrinkage): 180 μm [Manufacturing of hook fastener] Using the above warp, weft and yarn for hook-shaped engagement elements, a plain weave structure was used, and the initial weave density was 49 warp threads / cm and 16.5 weft threads / cm. The yarn for hook-shaped engagement elements was woven parallel to the warp threads at a ratio of one thread for every four warp threads, and after one weft thread was raised and lowered, it was made to cross three warp threads to form a loop.

[0131] The hook-and-loop fastener tape woven under the above conditions was heat-treated by running it through a 210°C heat treatment furnace for 60 seconds (tension of 200 g / cm in the length direction), thereby performing heat treatment on the warp threads, weft threads, and threads for the hook-shaped engaging elements.

[0132] The resulting hook-and-loop fastener tape was scouring using a commonly used high-pressure dyeing machine for textiles under the same scouring conditions as in Example 1.

[0133] The hook-and-loop fastener tape obtained under the above conditions was coated with a urethane layer on the back surface under the same conditions as in Comparative Example 1, dried at 100°C for 5 minutes, and then subjected to an aging treatment at 85°C for 9 hours, resulting in a back surface of 30 g / m². ２ A hook-and-loop fastener was formed having a layer made of polyurethane.

[0134] Next, using a cutting device that cuts between two fixed blades by the reciprocating motion of a movable cutting blade, one leg of the loop for the hook-shaped engaging element was cut to form the hook-shaped engaging element. The element density of the resulting loop hook fastener was 42 elements / cm². ２ The physical properties of the resulting hook fasteners are shown in Table 1.

[0135] (Comparative Example 4) The following yarns were prepared as the warp, weft, and loop-shaped engaging element yarns that make up the base fabric of the loop hook-and-loop fastener. [Warp] Multifilament yarn made of polyethylene terephthalate, total decitex and number of filaments: 30 filaments at 167 dtex

[0136] [Weft yarn (two strands of the following type of multifilament yarn, untwisted)] Multifilament yarn consisting of core-sheath type composite filaments - Core component: polyethylene terephthalate - Sheath component: 25 mol% isophthalic acid copolymerized polyethylene terephthalate (softening point: 190°C) - Core-sheath ratio (weight ratio): 70:30 - Total decitex and number of filaments: 24 filaments at 99 dtex

[0137] [Thread for loop-shaped engagement element] Multifilament thread made of polyethylene terephthalate; total decitex and number of filaments: 289 dtex, 8 strands

[0138] [Manufacturing of Loop Hook Fasteners] Using the above warp threads, weft threads, and loop-shaped engagement element threads, a plain weave structure was used, and the initial weave density was set to 49 warp threads / cm and 18.9 weft threads / cm. Loop-shaped engagement element threads were woven parallel to the warp threads at a ratio of one thread for every four warp threads, and after one weft thread was raised and lowered, a loop was formed without crossing the warp threads.

[0139] The loop hook-and-loop fastener tape woven under the above conditions was heat-treated by running it through a 210°C heat treatment furnace for 60 seconds (tension of 200 g / cm in the length direction), thereby performing heat treatment on the warp threads, weft threads, and threads for the loop-shaped engaging elements.

[0140] The resulting loop fastener tape was scouring using a commonly used high-pressure dyeing machine for textiles under the same scouring conditions as in Example 1.

[0141] The obtained loop hook-and-loop fastener tape was coated with a urethane layer on the back under the same conditions as in Comparative Example 1, dried at 100°C for 5 minutes, and then subjected to an aging treatment at 85°C for 9 hours, resulting in a back surface of 40 g / m². ２ A hook-and-loop fastener was formed having a layer made of polyurethane. The element density of the resulting loop hook-and-loop fastener was 45 elements / cm². ２ The physical properties of the resulting loop fasteners are shown in Table 1.

[0142] Furthermore, various engagement forces were measured by combining the hook fastener obtained in Comparative Example 3 and the loop fastener obtained in Comparative Example 4.

[0143] (Comparative Example 5) A hook-and-loop fastener was manufactured in the same manner as in Example 1, except that the scouring process was omitted. The physical properties of the obtained hook-and-loop fastener are shown in Table 1.

[0144] Furthermore, various engagement forces were measured by combining the hook fastener obtained in Comparative Example 5 and the loop fastener obtained in Example 2.

[0145]

[0146] As shown in Table 1, in Comparative Examples 1 to 5, the temperature at which the weight of the hook-and-loop fastener decreased by 0.5 wt% was in the range of 210°C to 234°C, indicating that the weight of the hook-and-loop fastener decreased and decomposition progressed at a lower temperature than in Examples 1 to 5. Similar results were obtained for the temperature at which the weight of the hook-and-loop fastener decreased by 1.0 wt%.

[0147] In Comparative Examples 1 to 5, the smoke concentration (Ds) exceeded the standard value, indicating that low smoke emission was not achieved. On the other hand, in Examples 1 to 5, the smoke concentration (Ds) was less than 27.5 in all cases, demonstrating that smoke emission was suppressed.

[0148] Velcro fasteners can be used in vehicles such as automobiles, aircraft, and trains; special clothing such as fire-resistant suits, firefighter uniforms, and high-temperature work clothes; and industrial materials such as insulation and building materials.

[0149] As described above, preferred embodiments of the present invention have been explained, but various additions, modifications, or deletions are possible without departing from the spirit of the present invention, and such are also included within the scope of the present invention.

Claims

1. A hook-and-loop fastener comprising a base fabric having a first surface as the front side and a second surface as the back side, a plurality of hook-shaped and / or loop-shaped engaging elements formed from threads for engaging elements that rise from the first surface of the base fabric and constitute a part of the base fabric, and an adhesive resin for fixing the threads for engaging elements within the base fabric, wherein in a test using TG-DTA, the temperature at which the weight of the hook-and-loop fastener decreases by 0.5 wt% is 235°C or higher.

2. A hook-and-loop fastener comprising a base fabric having a first surface as the front side and a second surface as the back side, a plurality of hook-shaped and / or loop-shaped engaging elements formed from threads for engaging elements that rise from the first surface of the base fabric and constitute a part of the base fabric, and an adhesive resin for fixing the threads for engaging elements within the base fabric, wherein in a test using TG-DTA, the temperature at which the weight of the hook-and-loop fastener decreases by 1.0 wt% is 264°C or higher.

3. The hook-and-loop fastener according to claim 1 or 2, wherein the base fabric is a woven fabric, and the warp and / or weft threads constituting the woven fabric include multifilament yarns.

4. The hook-and-loop fastener according to claim 1 or 2, wherein the yarn constituting the base fabric and / or the yarn for the engaging element are made of heat-resistant fibers.

5. The hook-and-loop fastener according to claim 1 or 2, wherein the adhesive resin includes a molten material of heat-fusible yarn.

6. The hook-and-loop fastener according to claim 5, wherein the heat-fusible yarn is a non-composite fiber.

7. The hook-and-loop fastener according to claim 5, wherein the heat-fusible yarn contains a polyester resin.

8. The hook-and-loop fastener according to claim 1 or 2, wherein the adhesive resin has a portion that is continuous in a planar manner.

9. The hook-and-loop fastener according to claim 8, wherein the adhesive resin penetrates at least a portion of the base fabric.

10. The hook-and-loop fastener according to claim 1 or 2, wherein the adhesive resin is at least one selected from the group consisting of polyester resins, acrylic resins, crosslinked polyurethane resins, crosslinked acrylic resins, and silicone resins.

11. The hook-and-loop fastener according to claim 1 or 2, wherein the smoke concentration (Ds) in a flameless test based on ASTM E662 is less than 27.

5.

12. A fastener for fixing thermal insulation material, wherein the fastener comprises a hook-and-loop fastener as described in claim 1 or 2.

13. An insulating material comprising the insulating material fastener described in claim 12.

14. A method for fixing thermal insulation using the thermal insulation fastener of claim 12.

15. A hook-and-loop fastener comprising a base fabric having a first surface as the front and a second surface as the back, a plurality of hook-shaped and / or loop-shaped engaging elements formed from threads for engaging elements that rise from the first surface of the base fabric and constitute a part of the base fabric, and an adhesive resin for fixing the threads for engaging elements within the base fabric, wherein in a test using TG-DTA, the temperature at which the weight of the hook-and-loop fastener decreases by 0.5 wt% is 235°C or higher, and a method for manufacturing a hook-and-loop fastener comprising the following steps B and D, and optionally step C, in the following order: [Step B] A step of fixing the threads for engaging elements within the base fabric with adhesive resin, [Step C] If a hook-shaped engaging element is to be formed, a step of cutting one leg of the loop to make the loop a hook-shaped engaging element, and [Step D] A step of scouring the hook-and-loop fastener.

16. The method for manufacturing a hook-and-loop fastener according to claim 15, wherein step B is performed by applying an adhesive resin to the second surface of the loop base fabric.

17. A method for manufacturing a hook-and-loop fastener according to claim 15 or 16, wherein the following step A is performed before step B: [Step A] A step of heat-treating a loop base fabric, which is formed of thermoplastic resin fibers and in which threads for engaging elements rise in a loop shape from a first surface of the base fabric, at a temperature of Tg + 15°C or higher, which is the glass transition temperature of the thermoplastic resin fiber with the highest glass transition temperature among the thermoplastic resin fibers constituting the loop base fabric, while under tension.

18. The method for manufacturing a hook-and-loop fastener according to claim 17, wherein, if the base fabric includes heat-fusible yarn containing an adhesive resin as a yarn constituting the base fabric, step B is performed by solidifying the heat-fusible yarn melted in the heat treatment of step A.

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