JP2006346862A - Ultrasonic welded product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ultrasonic welded product enhanced in manufacturing workability because of ultrasonic weldability at a relatively low temperature, good in fastness, flexibility and design property, and particularly suitable for sports, sporty clothing, etc. <P>SOLUTION: The ultrasonic welded product is characterized in that a plurality of fiber members are partially welded to each other ultrasonically preferably through a weld reinforcing aid such as a hot melt welding agent or the like and the hot melt welding agent further preferably contains polyurethane or a reactive hot melt. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an ultrasonic welded product in which sheet-like thermoplastic synthetic resin members are overlapped and partially bonded in a linear shape and collected into a required form.

  When a sheet-like thermoplastic synthetic resin member used for clothing or the like is put together in a required form, it is indispensable to sew the synthetic resin members together. As a result, the waterproof strength and leakage resistance were lowered, and the design of the thin member was also difficult.

JP-A-10-295418 JP 2001-159012 A

  In order to solve the above problems, the first object of the present invention is high manufacturing workability by ultrasonic welding, and since there is no seam or thread, it is robust and flexible at the time of actual use of the product. The object is to provide excellent ultrasonic welded fiber products such as sports and sporty clothes and storage goods.

  Ultrasonic welded products have no seams, so they are waterproof and leak-proof, and since there is no sewing thread, the elastic elasticity at the welded part is maintained, and three-dimensional welding and curved surface fitting are possible, so sporty and casual design is excellent. In addition, it does not require sewing and can be welded safely, so manufacturing workability is good. If an appropriate jig is prepared, welding (instead of sewing) and cutting (cutting) can be performed simultaneously by ultrasonic waves.

  In this way, ultrasonic welding has a number of advantages, but in order to further improve manufacturing workability without sacrificing design, welding must be performed at a high temperature and in a short time. There has been a problem that the welding strength of the convex portion contour portion of the fiber member to which the convex portion of the sonic welding head hits may be lowered, or the fabric of the welded portion may be deteriorated, resulting in lowering the fastness as a product.

  In order to solve the above-mentioned problems, the second object of the present invention is to provide high manufacturing workability, no seam, no sewing thread, and high welding strength by ultrasonic welding using hot melt or the like as a welding reinforcement aid. In particular, because the strength of the part where the contour of the convex part of the ultrasonic welding head hits is high, it is robust, flexible and excellent in design, especially for sports and sporty clothes, storage products, etc. It is to provide ultrasonic welded fiber products.

Hot melt has long been used for bookbinding and welding of wood and plastics. It is not a chemical change like ordinary welding agents, it melts at a high temperature during welding, and solidifies when it returns to room temperature. It mainly uses physical changes. In addition, since hot melt melts at a relatively low temperature in a short time, workability can be improved, and the tensile strength of the welded portion is high, resulting in a robust finish.
However, with hot melts used in these ultrasonic welding methods, it is necessary to maintain a certain level of strength during actual use of the product at room temperature, so that the weld location becomes strong and lacks flexibility, and the design of clothes, storage goods, etc. As a result, the workability at the time of welding and the strength and flexibility at the time of actual use of the product could not be satisfied.

  In particular, when designing sportswear and sporty clothing, it is necessary to devise a way to avoid strengthening at hot melt weld locations in order to maintain flexibility, and high extensibility and high resistance to actual tensile force application. Although resiliency is desired, such a requirement is not always met by a combination of a conventional fiber member and hot melt.

  The third object of the present invention is to solve the above-mentioned problems by applying a combination of materials preferable as hot melt and / or fiber member so that ultrasonic welding can be performed at a relatively low temperature and manufacturing workability can be improved. High-strength, robust and flexible when the product is actually used, especially with high stretchability and high resilience to the actual application of tensile force, and excellent design, especially for sports and sporty clothes and storage goods It is to provide ultrasonic welded fiber products such as.

  The ultrasonic welded product according to the present invention, which has been made to solve the above-described problems, continuously or intermittently in a state where a part of a plurality of sheet-like thermoplastic synthetic resin members are superposed on each other, It is characterized in that it is welded in a predetermined shape into a line having a required width as a whole by ultrasonic waves.

  Moreover, according to this invention which concerns on Claims 2-4, a part of several sheet-like thermoplastic synthetic resin member is mutually superposed | superposed via the ultrasonic welding reinforcement auxiliary agent containing a hot melt. It is characterized in that it is welded by ultrasonic waves in a predetermined shape and linearly having a required width as a whole.

  Further, according to the present invention of claim 5, in a state where the welding reinforcement assistant is ultrasonically welded through the welding reinforcement assistant, the welding reinforcement assistant is melted linearly as a whole, Within the width, it extends outside the contour determined by the shape of the contact portion of the ultrasonic welding head.

  According to the present invention of claim 6, some of the plurality of sheet-like thermoplastic synthetic resin members are welded to each other by ultrasonic waves via hot melt, and the hot melt includes polyurethane as a base polymer. It is characterized by being.

  According to the present invention of claim 7, some of the plurality of sheet-like thermoplastic synthetic resin members are welded to each other by ultrasonic waves via a hot melt, and the hot melt is subjected to a crosslinking reaction after welding. It is characterized by containing a reactive hot melt.

  Furthermore, according to the present invention according to claim 8, the reactive hot melt is a terminal isocyanate compound (a three-dimensional cross-linking by urea bond proceeds by moisture in the air after welding).

  Furthermore, according to the present invention of claim 9, the reactive hot melt is a silane compound (three-dimensional crosslinking proceeds by moisture in the air after welding).

  Further, according to the present invention of claim 10, the fiber member includes an elastomer fiber (high extensibility and recoverability).

  Furthermore, according to the present invention of claim 11, the elastomer fiber is polyurethane.

  Furthermore, according to the invention of claim 12, the elastomer fiber is a polyether ester.

  Further, according to the invention of claim 13, the sheet-like thermoplastic synthetic resin member is composed of a nonwoven fabric, a woven fabric or a pad, and a covering member, a band, a strip, a tape, a ribbon, a bedding fabric, a fabric, a garment, It is characterized by being configured in the form of a bag, shoes (shoe), tent, sailcloth (canvas), sleeping bag (sleeping bag), futon, or fiber compound web.

  According to the present invention, in order to maintain a certain degree of strength at the time of actual use at room temperature, it may lack flexibility and may impair the design of clothes, etc., and the workability during welding and the strength during actual use of the product The conventional disadvantage of not being able to satisfy the three of the flexibility is solved, and moreover, in sports and sporty clothes, etc., not only does it not be strong in terms of design but also the actual application of tensile force In contrast, it is possible to provide an ultrasonic welded product having high extensibility and high recoverability.

  The best mode for carrying out the present invention will be described with reference to FIGS.

  Referring to FIG. 1, in the first embodiment according to claims 2 to 5 of the present invention, a part of two sheet-like thermoplastic synthetic resin members 1 and 2 are superposed with each other in a state where they are superposed on each other. Through the welding reinforcement aid 3 such as, continuously (FIG. 1 (a)) or intermittently (FIG. 1 (b)), the ultrasonic wave is formed into a predetermined shape and a line having a required width as a whole. Has been welded by.

  In the case of ultrasonic welding, the tensile strength of the contour portion of the predetermined welded portion shape may be weak. In particular, in the case according to claim 5, as shown in FIG. Since the melt of the auxiliary agent 3 is welded over the range where the dots are attached, that is, outside the contour determined by the shape of the contact portion of the ultrasonic welding head, the tensile strength of the welded portions of the sheet-like members 1 and 2 is high. .

  Referring to FIG. 2, in the second embodiment according to claims 2 to 5 of the present invention, the cross-sectional shape shown in FIG. 1C, which is the first embodiment, is used to weld various sheet-like members. The case where it applies to a processing form is shown. 2 (a), (b), (c), and (d) are sequentially called sewing terms, and are referred to as “overlay”, “patting”, “underlay”, and “folding”.

  A part of the two sheet-like thermoplastic synthetic resin members 1 and 2 are welded reinforcing aids 3 such as hot melt in a state where the ends are folded and overlapped with each other in (c) and (d), As in the first embodiment, continuously (FIG. 1 (a)) or intermittently (FIG. 1 (b)) through the 31, 32, and 33, in a predetermined shape and linearly having a required width as a whole. Has been welded by ultrasonic.

  In (b), after the sheet-like members 1 and 2 are welded, the filling 4 is packed in the hollow portion between the welding wires.

  Further, in (c) and (d), the welding reinforcing agent 3 is inserted in all the opposing surfaces of the sheet-like members 1 and 2, but depending on the welding strength of the sheet-like members themselves or in combination with sewing. In the case, a part of 31, 32 and 33 can be omitted.

  In a third embodiment according to claim 6 of the present invention, some of the plurality of fiber members are welded to each other by ultrasonic waves through a welding reinforcement aid such as hot melt, and the hot melt is preferably , Polyurethane or a mixture of polyurethane and, for example, polyester or nylon. When polyurethane is used as the base polymer, it can be melted at low temperatures to obtain high welding strength, so it can be welded at high speed without damaging the fabric, and it has high stretchability and high recovery at room temperature and is compatible with synthetic fibers. Therefore, it is particularly suitable for sports or sporty products (clothing, etc.).

  In a fourth embodiment according to claim 7 of the present invention, some of the plurality of members are ultrasonically welded to each other via a hot melt, and the hot melt is, for example, a reactive hot melt or a reactive hot melt. It is a mixture of polyester and nylon. Since the heat resistance of the reactive hot melt is improved by the cross-linking reaction after welding, it can be welded at a lower temperature, and after welding, the welding strength can be maintained even at high temperatures exceeding the initial welding temperature. Welding work can be done at high speed without damage.

  In the fifth embodiment according to claim 8 of the present invention, the reactive hot melt in the fourth embodiment is a terminal isocyanate compound. Since the terminal isocyanate compound undergoes three-dimensional crosslinking by urea bonding due to moisture in the air after welding, the effect described in the fourth embodiment can be realized more clearly.

  In a sixth embodiment according to claim 9 of the present invention, the reactive hot melt in the fourth embodiment is a silane compound. Since the silane compound undergoes three-dimensional cross-linking due to moisture in the air after welding, the effects described in the fourth embodiment can be realized more clearly.

  In the seventh embodiment according to claim 10 of the present invention, the plurality of fiber members welded by ultrasonic waves through the hot melt welding agent in the first to sixth embodiments are elastomer fibers or elastomers. It is a blend of fibers and polyester, nylon, etc. Elastomer fibers are rich in stretchability, recovery and elasticity, and also have high environmental resistance (rich in moisture resistance, heat resistance, chemical resistance and light resistance), and the ultrasonic welding method using reactive hot melt as described above. The compatibility is also good, and it is particularly suitable as a fiber material for sports or sporty products (such as clothes).

  In an eighth embodiment according to claim 11 of the present invention, the elastomer fiber in the seventh embodiment is polyurethane. Since polyurethane is rich in extensibility, recoverability, and elasticity, the effects described in the sixth embodiment can be clearly realized.

  In a ninth embodiment according to claim 12 of the present invention, the elastomer fiber in the seventh embodiment is a polyether ester. The polyether ester is rich in extensibility, recoverability and elasticity, and in addition, has high environmental resistance (rich in moisture resistance, heat resistance, chemical resistance and light resistance), so the effects described in the seventh embodiment are more concrete. Can be realized.

  In a tenth embodiment according to claim 13 of the present invention, in the first to ninth embodiments, a specific kind of ultrasonic welded product is the plurality of sheet-like thermoplastic synthetic resin members, a nonwoven fabric, Consists of woven fabric or pad, covering member, band, strip, tape, ribbon, bedding fabric, fabric, garment, bag, shoes (shoe), tent, sailcloth (canvas), sleeping bag (sleeping bag), futon, Or in the form of a fiber compound web, wherein the ultrasonically welded product, alone or as a composite element, includes leg gathers, leg bands, side panels, or waistbands, Suitable as sports equipment or sporty everyday goods.

  In an eleventh embodiment according to claim 14 of the present invention, in the first to tenth embodiments, the plurality of sheet-like thermoplastic synthetic resin members are a single type of synthetic fiber and a composite of a plurality of types of synthetic resin fibers. Since it is composed of fibers or composite fibers of synthetic resin fibers and natural fibers, the characteristics and texture of natural fibers can be utilized together.

FIG. 4 is a diagram illustrating an example in which the shape of the welded portion by the ultrasonic welding head is continuous, and FIG. 5B is an example in which the shape of the welded portion by the ultrasonic welding head is intermittent. (C) shows the AA cross section of (a) and (b). It relates to Example 2 of the present invention, (a) is overlapped, (b) is a batting, (c) is folded, (d) is a piece of ground stitching, in each case The example of the AA cross section of Fig.1 (a) and (b) is shown.

Explanation of symbols

1 Sheet-like member 1
2 Sheet-like member 2
3, 31, 32, 33 Welding reinforcement aid such as hot melt 4 Filling

Claims (14)

  A part of a plurality of sheet-like thermoplastic synthetic resin members are welded by ultrasonic waves continuously or intermittently in a predetermined shape and in a linear shape having a required width as a whole in a state where they are overlapped with each other. Ultrasonic welding product characterized by   A linear shape having a predetermined width as a whole in a predetermined shape continuously or intermittently with a welding reinforcement aid in a state where a part of a plurality of sheet-like thermoplastic synthetic resin members are overlapped with each other Ultrasonic welded product characterized by being welded by ultrasonic.   The ultrasonic welding product according to claim 2, wherein the welding reinforcement aid contains hot melt.   The ultrasonic welding product according to claim 2, wherein the welding reinforcement aid is a hot melt.   In a state where the welding reinforcement assistant is ultrasonically welded, the melting of the welding reinforcement assistant extends outside the contour determined by the shape of the contact portion of the ultrasonic welding head within the required width. The ultrasonic welded product according to any one of claims 2 to 4, wherein the ultrasonic welded product is provided.   The ultrasonic welded product according to any one of claims 2 to 5, wherein the hot melt contains polyurethane as a base polymer.   The ultrasonic welded product according to any one of claims 3 to 6, wherein the hot melt contains a reactive hot melt.   The ultrasonic welded product according to claim 7, wherein the reactive hot melt is a terminal isocyanate compound.   The ultrasonic welded product according to claim 7, wherein the reactive hot melt is a silane compound.   The ultrasonic welded product according to any one of claims 1 to 9, wherein the fiber member includes an elastomer fiber.   The ultrasonic welded product according to claim 10, wherein the elastomer fiber is polyurethane.   The ultrasonic welded product according to claim 10, wherein the elastomer fiber is a polyether ester.   The plurality of sheet-like thermoplastic synthetic resin members are composed of a nonwoven fabric, a woven fabric or a pad, and a covering member, a band, a strip, a tape, a ribbon, a bedding fabric, a fabric, a garment, a bag, shoes (shoes), a tent, The ultrasonic welded product according to any one of claims 1 to 12, wherein the ultrasonic welded product is configured in the form of a sailcloth, a sleeping bag, a futon, or a fiber compound web. .   The plurality of sheet-like thermoplastic synthetic resin members are composed of a single type of synthetic fiber, a composite fiber of a plurality of types of synthetic resin fibers, or a composite fiber of synthetic resin fibers and natural fibers, The ultrasonic welded product according to any one of claims 1 to 13.

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