TWI786138B - Elastic yarn wound body package - Google Patents

Abstract

Elastic yarn wound body packages able to simplify processing of a tail yarn of an elastic yarn when manufacturing a fabric, or the like, continuously by simultaneous vertical take-up unwinding of a multistage elastic yarn through providing elastic yarn wound body packages on a multistage stand are provided. The elastic yarn wound body package comprises a paper tube and an elastic yarn wound body, wherein: the paper tube has a groove in the circumferential direction, perpendicular to the paper tube axis, between an end portion of the elastic yarn wound body and an end portion of the paper tube; a tail yarn of the elastic yarn wound body is wound into the groove; and a wire-shaped object or tape-shaped object that crosses at least a portion of the yarn bundle of the tail yarn is held thereby. Also provided are paper tubes comprising, in the vicinity of at least one end, a tail thread wrapping groove having parallel edges along a circumferential direction perpendicular to the axis of the paper tube, the paper tube comprising a recession, the maximum width of which is greater than the width of the tail thread wrapping groove and the deepest part of which is deeper than the tail thread wrapping groove, over the tail thread wrapping groove or an extension of the tail thread wrapping groove and elastic thread reel packages comprising these paper tubes.

Description

Elastic Yarn Laminate Package

The present invention relates to an elastic yarn ply package which has a yarn tail and which is superior in terms of handling, and in particular to an elastic yarn ply package in which it is easy to incorporate in the manufacturing process of the treated product The end yarn of the elastic yarn is extracted from the middle, wherein the elastic yarn is used as a material, thereby enabling to improve the convenience of operation when switching the lap body. More specifically, it relates to a ply package of elastic yarn in which the elastic yarn has particular properties for medium/large gauge products when used with handling equipment that takes up and releases the elastic yarn in the direction of the winding core. significant effect. The present invention also relates to a paper tube that produces a reel package of elastic thread that is extremely easy to handle, and to a spool package of elastic thread using the paper tube.

Elastic yarns and especially polyurethane elastic yarns (which may also be referred to as "polyurethane elastic fibers") are used as functional raw materials that can be stretched and retracted in the following fields: in clothing, such as tight-fitting Girdles, socks, pantyhose, swimwear, etc., and in the field of sports, take advantage of its stretchable properties. In addition, in recent years, these elastic yarns have been combined with non-woven products and used as extensible members of three-dimensional gathering parts, waist parts, and leg parts in disposable paper diapers, and are used for adults, breastfeeding care, children, babies, etc. etc. are sold worldwide in a variety of sizes and designs. It has also been used in sanitary napkins and the like.

To facilitate this variety of sizes and designs, there are known techniques in which the gauge and yarn extensibility of the elastic yarns differ from site to site, and in which several or tens of elastic yarns attached to the nonwoven in parallel are provided simultaneously.

In Patent Document 1, in view of the need to be able to continuously use a large amount of polyurethane elastic yarn in the above-described disposable paper diapers or sanitary materials, in recent years, release polyurethane in the axial direction of the paper tube The vertical winding and unwinding of ester elastic yarn has become the main way. In an elastic yarn ply package unwound using this vertical winding, the formation of a lead yarn (also referred to as a "yarn tail") and tail yarn (also referred to as a "yarn") is described, wherein in Grooves (also referred to as "slits") are provided in the circumferential direction, which are closer to the outside than the winding width of the elastic yarn roll layer on the paper tube where the tail yarn is used at this time, and when the winding is started, the The yarn is placed into the groove. Using this structure enables the tail yarn to be connected to the lead yarn from another elastic yarn package, thereby enabling the elastic yarn package to be switched without stopping the process, enabling continuous vertical winding and unwinding.

Patent Document 2 discloses something about a groove in a paper tube for forming tails, and Patent Document 3 discloses something about the shape of a groove in a paper tube for an elastic thread.

In recent years, in hygienic products using a combination of non-woven fabrics and elastic yarns such as disposable paper diapers, etc., the increase in consumer population has led to an increase in production volume, and the amount of elastic yarn used has increased commensurately, and Therefore, in the manufacturing process for such products, there is a need to increase the convenience of picking up the tail yarn from the elastic yarn ply package.

Currently, the main method is usually to place the yarn tail into a shape by cutting enough for removal from the groove in the paper tube after making the elastic yarn ply package and for attachment to the the desired length of lead yarn; or a method wherein, after winding up the elastic yarn, the tail yarn is wound into a paper tube groove so that a person or machine removes the tail yarn from it during handling.

In the form in which the tail yarn is captured after manufacture of the elastic yarn roll-up package described above, when shipped to processing equipment for hygienic material applied products such as disposable diapers and the like, the tail yarn Damaged by abrasion or the like, by contact with packaging materials and by vibrations during transport, causing the problem of yarn breakage during unwinding of the vertical winding in the handling equipment, and thus requiring a yarn tail A roll layer package of elastic yarn in the form of being wound into a paper tube. While this would enable avoidance of damage suffered during transport when shipped to the processing facility, this would require an operation for retrieving the tail yarn from the elastic yarn ply package at the processing facility, i.e., where human One would have to find a location for picking up the tail yarn bundle from the groove of the paper tube and then have to grip the tail yarn bundle by hand and adjust to the length of tail yarn needed for connecting to the lead yarn etc., thus requiring the operation to be Laborious and time-consuming. In detail, when the tail yarn is manually picked up from the groove of the paper tube, the stretchable elastic yarn bites into the groove of the paper tube, making it difficult and time-consuming to pick up. Therefore, the problem is to improve the visual visibility of the location for picking up the tail yarn and to facilitate easy handling of the tail yarn in the handling device.

Although innovations such as those disclosed in Patent Document 4, in order to improve the capture of tail yarns by providing the paper tube grooves from around the entire circumference of the paper tube to providing the groove cutouts where the portion partially does not exist, the processing operator In the case of visual inspection of the position of the tail yarn of the elastic yarn wound here again and the tail yarn is picked up by manual grasping, this still requires inspection of the entire paper tube of the elastic yarn roll layer package. around to find that part and the visual legibility problem still exists. JP-A 2000-289931 JP-A 2004-203519 JP-A H09-328260 JP-A 2014-105103

The problem to be solved by the present invention is to provide a package for elastic yarn roll layer body package and paper tube, by making it easier to visually recognize the ability to attach the tail yarn, even using the same as patent document 4 The absence of a partially grooved cutout portion of the paper tube further reduces the operational overhead incurred by being able to pick up the length of tail yarn required to reliably connect to the lead yarn (whether manually or by using a tool).

In order to solve the problems set forth above, the present invention uses any one of the following methods: (1) A paper tube comprising a tail winding groove near at least one end, and the tail winding groove has a Parallel edges perpendicular to the circumferential direction of the axis of the paper tube, the paper tube comprising a recess above the tail winding groove or an extension of the tail winding groove, the maximum width of the recess being greater than the tail The width of the winding groove and its deepest part are deeper than the winding groove of the tail wire. (2) The paper tube according to (1), wherein the recess has a groove shape such that at least one side is larger than the width of the tail winding groove and intersects the circumferential direction perpendicular to the axis of the paper tube. (3) The paper tube according to (2), wherein the groove-shaped indentation intersecting the circumferential direction orthogonal to the axis of the paper tube reaches an end of the paper tube. (4) The paper tube according to any one of (1) to (3), wherein at least part of the recess passes through the paper tube. (5) An elastic yarn ply package comprising a paper tube and an elastic yarn ply, wherein: the paper tube has an A groove in the circumferential direction perpendicular to the axis of the paper tube; the tail yarn of the elastic yarn roll body is wound into the groove; and a linear object or tape passing through at least a part of the yarn bundle of the tail yarn Objects are held in place by this. (6) The elastic yarn roll layer package as described in (5) above, wherein: the thread-shaped object or the tape-shaped object is annular; and the yarn bundle of the tail yarn is a loose bundle. (7) The elastic yarn roll layer package as described in (6) above, wherein: the loop length of the thread-shaped object or the belt-shaped object forming the ring shape is longer than the circumference of the paper tube, and is set at Wherein the paper tube is placed in the state of the ring. (8) The elastic yarn roll layer package as described in any one of (5) to (7) above, wherein the material of the thread-shaped object or the tape-shaped object is flexible. (9) The elastic yarn rolled layer body package as set forth in any one of (5) to (8) above, wherein at least one marker is attached to the thread-shaped object or the tape-shaped object.

In the present invention, the tail yarn is provided on the winding core paper tube, wherein the position for picking up the tail yarn can be easily recognized visually, and the tail yarn can be fixed manually or by using a tool such as a jig. can be retrieved accurately, and the workload can be further reduced. Prevents damage to the end yarn section even during box packing and transportation.

The present invention is an elastic yarn ply package made of paper tube and elastic yarn ply and the paper tube used in the elastic spool package. The paper tube has a groove in the circumferential direction perpendicular to the axis of the paper tube between the end portion of the elastic yarn roll body and the end portion of the paper tube, wherein the end yarn of the elastic yarn roll body is wound to A thread-like or ribbon-like object in the groove and passing through at least a part of the yarn bundle of the tail yarn is thereby retained.

In the present invention, elastic yarn lap refers to rolled up elastic yarn in the form of cheese, wherein the elastic yarn lap is wound onto a paper tube and is called "elastic yarn lap package". In the present invention, the paper tube has a groove between the end portion of the elastic yarn roll body and the end portion of the paper tube in the circumferential direction perpendicular to the axis of the paper tube, and the end yarn of the elastic yarn roll body Wrapped into the groove. That is, as illustrated in FIG. 5, in the elastic yarn roll body package according to the present invention, there is a groove 8 for winding on the tail yarn 2 in at least one part, in which at least one part, The paper tube 7 is exposed from the elastic yarn rolling layer body 9 and the elastic yarn serving as the tail yarn 2 is wound therein. In view of this, the thread-like or ribbon-like objects passing through at least a part of the yarn bundle of the tail yarn are thereby held. By using this structure, the tail yarn 2 can be easily pulled out from the elastic yarn roll layer package by grasping and pulling the thread-like or ribbon-like article in which the tail yarn is held while being used by the handling equipment. By this, the tail yarn 2 can be spliced to the lead yarn 10 of the next-to-be-used elastic yarn package, thereby enabling smooth switching of elastic yarn packages without interruption of the process. It should be noted that the definitions of "line-shaped object" and "ribbon-shaped object" are given below.

Although there is no specific limitation on the shape of the paper tube according to the present invention, it is generally a round cylindrical tube, such as shown in FIG. 7 (wherein FIG. 7a-1 and FIG. 7a-2 and Fig. 7b-2 are views along the axial direction of the paper tube) are typical. Colored paper is adhered to the surface of the paper tube, and a cellophane film having regenerated cellulose as its main component or a moisture-proof celophane film, a polyester film, etc. are further laminated over the colored paper, or have polyester A resin coating agent with vinyl alcohol as its main component or its equivalent is coated over colored paper for use. Furthermore, although the colored paper itself is glued and used after undergoing roughening procedures, embossing procedures, etc., in the present invention, the effect of the present invention will not be attributed to the material, surface agent or surface treatment of the paper tube method differences are lost.

The tail winding groove between the end portion of the elastic yarn roll body and the end portion of the paper tube is wider in the axial direction of the paper tube than the winding width on which the elastic yarn is wound. The presence on at least that side near the end (i.e. in the portion that is the exposed portion of the paper tube in the elastic yarn roll package) enables the extended portion to act as a tail when forming the elastic yarn roll was pulled out.

Generally, when the length of the paper tube is defined as 100%, it is preferred to have the exposed portion of the paper tube in the elastic yarn roll layer package between 5 and 10% at both ends. Typically, the exposed paper tube portions of an elastic yarn lap body package having a net weight of elastic yarn of 4.5 kg are each between 8 and 15 mm. Grooves for fastening tail yarns are provided on at least one of the paper tube parts. It should be noted that when the tail winding groove is near only one of the end portions, such that the elastic yarn wrap therein is positioned such that the length ratio of the exposed portion of the paper tube on the side with the groove is on the other side Long rolls on one side will not be a problem.

Tail yarn winding groove refers to a groove provided in the direction of winding the tail yarn (ie, the direction perpendicular to the axis of the paper tube). Furthermore, the groove may exist around the entire periphery in the circumferential direction up to the axis of the paper tube, or there may be a portion where the groove is interrupted in a portion in the circumferential direction. From the point of view of reliably holding the tail yarn in the tail yarn winding groove during winding, the ratio of the length of the tail winding groove that does not exist is better when the tail yarn winding groove does not surround the entire circumference Between 3 and 10%, more preferably between about 4 and 8% when the circumference of the paper tube is defined as 100%.

The method for forming the yarn tail winding groove in the paper tube is not particularly limited, such as a method for forming a continuous depression by pressing, a method for introducing a cut using a blade or the like, but wherein by applying a rotating blade The method of forming the incision is preferred. The reasons for this include the ability to change the shape of the groove depending on the shape of the rotating blade, the ability to freely change the depth and width of the groove by the way the rotating blade is applied, and the ability to form a groove with a complex cross-section by using a combination of rotating blades with different shapes. The ability to notch shapes and more. Furthermore, since the grooves are applied by this procedure, the cross-sectional shape of the yarn tail winding grooves is generally V-shaped or substantially V-shaped or a shape similar thereto.

The shape of the tail winding groove (change in groove width) and the cross-sectional shape of the tail winding groove in the surface of the paper tube should be set in consideration of the shape of the tail yarn, that is, the effective surface when winding is performed. , the specifications of elastic yarn, its modulus of elasticity and so on. For example, in order to facilitate easy winding of the tail yarn onto the paper tube, a shape in which the groove width at one part of the tail winding groove can be wider than at the other part and can be cut deeper can be provided as the introduction groove. groove. In addition, generally speaking, the depth of this introduction groove is preferably not as deep as the rest of the tail yarn winding groove. This lead-in groove may exist in a plurality of places in the groove facing the peripheral direction.

When forming an elastic yarn roll body package by winding elastic yarn onto a paper tube, the elastic yarn is first wound into tail winding grooves provided on the paper tube, and then the elastic yarn roll layer is formed Body part to produce elastic yarn roll layer body package. The tail yarn is wound and bitten into the groove on the paper tube, and forms a yarn bundle in the groove.

There is no specific limit to the length of the tail yarn of the elastic yarn package, which can be set as needed depending on the winder mechanism used to wind the elastic yarn, but usually at least two windings are wound to the paper tube It is preferred that the trailing yarn is wound in the groove, and at least five windings are even better. Although there is no specific limit to the upper limit of the number of windings into the tail winding groove of the paper tube, usually 10 windings are sufficient, and preferably the degree of winding is such that the tail yarn does not extends beyond the groove.

In the present invention, a thread-like object (1 in FIG. 1A ) or a strip-like object (3 in FIG. 1B ) that passes through at least a part of the yarn bundle of the tail yarn is wound from the tail yarn winding groove that is wound to the paper tube. The yarn bundle (5 among Fig. 3) of tail yarn in the groove is held. "At least a portion" indicates that the total number of turns relative to the end yarn warp is between about 20 and 100%, and preferably between about 50 and 90%. "Through" means the direction in which the thread-like object or tape-like object should pass through the tail yarn groove, that is, the direction in which the tail yarn is wound (A in FIG. 3 ).

For "line objects" and "ribbon objects", if the minimum area circumscribed rectangle is drawn for the cross-section of the part passing through the tail yarn, then the ratio of short edge/long edge between 0.7 and 1 will be "Line-shaped objects", and the short edge/long edge ratio is not less than 0.01 and lower than 0.7 will be "ribbon-shaped objects".

As a typical example, the material used for thread-like objects or tape-like objects may be raw materials such as paper thread, cotton thread, etc., plastic resin such as nylon, polyester, etc., or a combination thereof, or thread may be used. etc. to enhance, but there is no limit to it. A balance of rigidity and flexibility is considered to some degree because there will be stretch when winding onto the tail yarn of the elastic yarn roll and because the tail yarn must be wound and held, such as with rubber , preferably made of nylon or polyester resin.

Especially preferred are those wherein the nylon or polyester resin is molded into an article substantially in the shape of a thread or ribbon, wherein in the case of a thread the cross-section preferably has a diameter between about 0.2 and 1.0 mm Circular shape in diameter, and if strip-shaped, the strip thickness is preferably not greater than 1.0 mm, and the strip width is between about 2.0 and 4.0 mm.

The thread or tape according to the invention is preferably applied through the tail yarn, wherein the thread or tape is in the shape of a loop and the yarn bundles of the tail yarn become loose bundles. "Annular" means forming an entire loop shape or part of a loop shape. "Loose bundle" indicates a state in which the yarn bundle is not in a compact state due to thread-like or ribbon-like objects (Figure 1 C, 4 in Figures 2 to 4), i.e., where the tail yarn can be Free movement within a ring (circle) formed by a linear object or a strip-shaped object. That is, if it is a normal compact bundle, that is, if it is fully tightened so that the tail yarn bundle will not be damaged, then when using a thread-like object or a ribbon-like object according to the invention from elastic yarn roll layer package It will not be possible to change the length of the tail yarn (L in FIGS. 1A and 1B ) when the tail yarn is pulled out.

As representative examples of specific thread-like objects, there are resin molded products such as those made of nylon or polyester, called, for example, "Loop Lock" (registered trademark) line locks, "Chain Locks" (registered trademark ), loose ties, marking fasteners, etc., which are commercially available in which the tip end at one end is narrowed and provided (exists) on that tip end for the purpose of preventing removal Teeth, where the other pointed end has an insertion opener for fastening, thus having a function for preventing removal, can be used, and the thickness, loop length, etc. can be varied as desired. These can be easily formed into loop-like rings (loops), where ends treated to fasten wire-like objects are particularly suitable as the tail yarns can easily be loosely bundled. Also, it is preferred where the pointed end is pointed so as to span a portion of the yarn bundle on the paper tube.

Furthermore, although it may be formed of, for example, monofilament thread made of nylon such as used in fishing etc. or handmade yarn or sewing machine thread combining natural fibers such as cotton or kapok with synthetic fibers, when forming loops , the two ends must be joined together and therefore it is preferable to use a resin molded product in which the two ends can be fastened together as described above.

Typical examples of specific tape-like articles include resin molded products, which are generally made of nylon or polyester, known as, for example, bundled straps, cable ties, "Insulock" (registered trademark), etc., and can be used Commercially available products are available, and products in which the shape of the wire, the length of the loop, etc. can be changed as needed can be used. Among these products, a product in which an annular ring (loop) can be easily formed and in which the size of the loop can be freely changed is particularly suitable. In addition, a product in which the tape width is narrow and in which one of the tip ends is pointed is preferable in view of a part of the yarn bundle passing through the tail yarn on the paper tube.

As described above, providing a thread or tubular object passing through at least a part of the yarn bundle of the tail yarn enables it to act as a guide mark as a position for picking up the tail yarn, thereby greatly improving visual recognizability. Furthermore, forming it into a loop allows for easy gripping during manual retrieval and, in some cases, enables hooking with an L-shaped hook tool. This enables the automation of the operation for picking up the tail yarn (tail yarn picking operation) in the case of using equipment or machines.

Furthermore, making the length of the loop of the thread-like object or the tape-like object longer than the circumference of the paper tube makes it possible to set in a state in which the paper tube is positioned within the loop ( FIG. 4 ). This makes it possible to avoid the inadvertent incident of yarn tails accidentally falling off due to contact with the boxing material when the elastic yarn roll layer package is boxed and shipped to processing equipment. In this case, the loop length is preferably between 1.1 and 1.5 times the diameter of the paper tube. If it is less than 1.1 times, the ease of handling will be reduced when positioning the paper tube inside the ring, and if it is more than 1.5 times, the paper tube will tend to come off from the ring.

Furthermore, a flexible thread or strip means, in particular, that the shape of the loop can be deformed into any shape depending on the size and shape of the suction input to a machine such as an air extractor or suction device . The flexibility of the thread-like or ribbon-like objects enables suction of the trailing yarn bundle, thereby enabling easy extraction from the elastic yarn roll layer package.

Furthermore, in the elastic yarn roll layer body package according to the present invention, preferably, at least one marker is attached with a thread-shaped object or a tape-shaped object. Here, a "tag" is an attached tag that is used to add information about the object to which the tag is attached.

There is no specific limit to the size or shape of the mark, but if it is too large, there will be a relatively large possibility of damage, such as breaking or deformation, such as wrinkling or bending, and if it is too small, there may be problems such as visual legibility or inability to Adequate coverage of information volume issues. From these viewing angles, the size and shape of the display surface should preferably be in the range of a square kept between 10 and 80 mm. Furthermore, if there are corners in the shape, this may damage the elastic yarn at the surface of the elastic yarn ply package, and therefore preferably, for polygonal shapes, the shape is such that the connecting portions for the individual edges are rounded rather than corners.

Although there is no specific limit to the thickness of the marking, if it is too thin, there will be a relatively high possibility of damage due to deformation or tearing, and if it is too thick, this will be a direction that is relatively resistant to deformation, which will improve vision Recognizable but potentially damaging elastic yarn ply packages. From this viewing angle, preferably, it is in the range between 0.05 and 0.5 mm.

There are no specific restrictions on the material of the marking, but it should be chosen as appropriate from the perspective of deformability and printing used to display the information. From the perspective of deformability, if it is too soft, the visual discernibility and ability to read the information will be reduced due to deformation, but if it is too hard, the elastic yarn roll layer package may be damaged. From the viewpoint of printability, preferably, it is already coated paper or resin film or the like for printing, or something in which they are laminated together.

As for the method for attaching the mark, there is no particular limitation as long as the mark does not come off accidentally from the thread or tape, and methods such as: (i) attaching to the thread or tape can be used. Tape integration; (ii) attaching to a wire or tape; (iii) removably attaching a marker by passing the wire or tape through a hole or cylindrical location formed in the marker ; or its analogues. An example of a marker 11 attached to a thread-like object and an elastic yarn roll layer package to which the marker 11 is attached by the method in (iii) is illustrated in FIG. 6 . Figure 6-1 is an example of attaching a marker by folding back a portion of the marker and adhering the portion to form a cylindrical position and passing a wire-like object through the marker. Adhesives may be used to secure the folded back position, and heat welding, staplers, etc. may alternatively be used without particular limitation. Additionally, a thread may be attached to the cylindrical location to enable movement, or a marker may be attached to enable movement without fastening the thread and marker. Fig. 6-2 is an example in which perforations 12 for tearing are provided in the mark of Fig. 6-1 and the mark is torn off when the elastic yarn roll package is used. Fig. 6-3 is an example in which a thread-like object is passed through a hole provided in a marker. Figures 6-4 are examples in which a thread-like object is passed through two holes provided in the marker. The marker can be loosely fastened to the thread-like object by varying the size of the holes provided. Figures 6-5 are examples where a portion of the marker is folded back to form a tubular portion through which a thread-like object is passed.

Attachment of the marker enables easy identification of the elastic yarn roll layer package. For example, in processing equipment that simultaneously uses different types of elastic yarn ply packages for bonding to nonwovens, identification of elastic yarn ply packages is important in order to produce a specified product and can In this state, it is suitable to easily identify elastic yarn roll layer package self-handling efficiency and product yield.

Attaching information for identifying the package of layers of elastic yarn by the color or shape of the marking displayed on the marking and/or texts, numbers, symbols, etc., enabling the identification of the elastic yarn when compared to known methods Curls are much easier. That is, the information conventionally used for identification is the product indicator label of the product box that is packaged around the elastic yarn ply package or the label applied to the inside of the paper tube that is part of the elastic yarn ply package. Product indicator sticker so that it is difficult to distinguish another roll from the outside, but when attaching the marking, there is no need to look inside the tube after removing it from the box. Although conventionally there have been situations where elastic yarn manufacturers, for example, color the paper tubes differently so that the type of elastic yarn can be easily identified, attaching markings as described above reduces the work of changing the color of the paper tubes, simplifies Purchased paper tubes and so on.

Together with the information displayed on the marking as information directly readable by humans, such as text, numbers, symbols, etc., it is also possible to provide: a barcode, where it converts digital information into information compressed into a one-dimensional pattern; or two-dimensional Codes, such as "QR codes" (registered trademark), which convert information into two-dimensional patterns. When such digital information is used, it is preferred to include also traceability information such as date and location etc. regarding the manufacture of the elastic yarn roll layer package. In addition, registered trademarks, logos, etc. of the elastic yarn roll layer package can be displayed. The marking information described above enables the user of the elastic yarn ply package to use this information to correctly identify the elastic yarn ply package, and from the elastic yarn manufacturer's side, also facilitates information such as during processing. The defect of broken yarn needs to be improved.

Although there is no particular limitation on the elastic yarn used in the present invention, polyurethane elastic fiber or polyurethane elastic yarn can be cited as preferable examples. Furthermore, elastic yarns are multifilaments constructed from a plurality of individual filaments, and are typically elastic yarns having between 20 and 120 filaments. While there is no particular limitation on the gauge of the elastic yarn, gauges of elastic yarn applied between 150 and 1300 decitex (referred to as medium/larger gauge products) are preferred. The cross-section of the filament can be oval, peanut-shaped, brow-shaped, etc., or can be a combined unit of a mixture of these shapes.

The present invention is also a paper tube comprising, near at least one end, a tail wrapping groove having parallel edges along a circumferential direction perpendicular to the axis of the paper tube, the paper tube at the end of the tail The winding groove or the stretched part of the tail wire winding groove contains a recess above, the maximum width of the recess is larger than the width of the tail wire winding groove and the deepest part is deeper than the tail wire winding groove.

The paper tubes to which the present invention is directed are preferably used for elastic threads. While there is no particular limitation on elastic threads, the present invention is preferably applied to threads that develop longitudinally along the core direction, where medium to large linear mass densities (250-1,300 The effect is particularly pronounced in machining equipment for elastic threads made of dtex. Examples of such elastic threads include polyurethane elastic fibers and polyurethane elastic threads. Elastic threads are multifilaments composed of a plurality of filaments, typically having 20 to 120 filaments.

As shown in FIG. 7, the paper tube according to the present invention comprises near at least one end (the paper tube end surface 14) a tailwinding groove 13 having an Parallel edges in the circumferential direction of the axis. The edges of the tail winding groove 13 referred to here are the two opposite boundaries between the tail winding groove and the surface of the paper tube, and are marked as 18, Figure 8 shows a cross-section of the tail winding groove. "Parallel" means that the edges are parallel along at least 80% of the entire length of the tail wrap groove. Here, "parallel" has a runout tolerance of about ±1°. The presence of this tail winding groove allows to eliminate the situation where the tail can be fixed in place when the spool is formed on the paper tube and the tail can be hidden or partially in the innermost layer of the spool when the spool is formed The ground is captured, as in the case of the example of a conventional spool of elastic thread schematically illustrated in FIG. 5 . "Near" the end of the paper tube means the area closer to the axial end of the paper tube than at least the width of the wound elastic thread, i.e. the exposed portion of the end of the paper tube in the reel package; The presence of the tail winding groove in this part allows the first part of the wire wound onto the tube to be extracted as a tail when forming the spool. Usually, assuming that the length of the paper tube is 100%, the vicinity of the end is preferably 5 to 100% from the end. The exposed portions of the ends of the paper tubes in a typical spool package with a net elastic weight of 4.5 kg are each 8 to 15 mm. The effect of the present invention can be exhibited as long as the tail winding groove exists near at least one end, but it is preferred that the groove exists at both ends, as this allows the orientation of the paper tube to be ignored when forming the spool , and it is only necessary to reverse the orientation of the paper tube when a groove loses its grip, making it more difficult to form tails after repeated use. If the tail winding groove exists near only one end, there is no problem of arranging the spool such that the end where the groove is present has a greater exposed length than the other end.

The tail wrapping grooves are orthogonal along the entire perimeter (like 7a-1 and 7b-2 in Figure 7) or discontinuously along the circumferential direction (like 7b-1 and 7b-2 in Figure 7). It extends in the circumferential direction of the axis of the paper tube. If there is no tail wire winding groove along the entire circumference, assuming that the total paper tube circumference is 100%, the ratio of the length without tail wire winding groove is preferably 3 to 10%, more preferably about 4 to 8%, because this allows the tail wire to be reliably gripped in the tail wire winding groove when the wire is wound.

There is no particular limitation on the method used to form the tailwind groove near the end of the paper tube, such as by compression or using a blade to cut the groove to form a continuous indentation, but cutting is done by pressing a rotating blade against the tube. Out of the groove system is better. One of the reasons for this is that the shape of the groove can be changed by changing the shape of the rotating blade, the depth and width of the groove can be freely changed by pressing the blade against the tube, and grooves of complex shapes can be changed by using different The combination of rotating blades of the shape is formed. Because the grooves are given in this way by machining, the cross-sectional shape of the grooves is typically V-shaped, substantially V-shaped, or similar.

In determining the groove directional shape of the tail winding groove, the formation of the tail, ie, the effective surface during winding, the linear mass density and modulus of the elastic thread, etc. may be considered. For example, the groove may have an entry groove formed by making one part of the tail wrapping groove wider than the rest to facilitate winding the tail in the groove, or multiple locations along the circumferential direction of the groove deal with such parts. The depth of the entry groove is the same as the depth of the rest of the tail winding groove (as defined below).

There is no particular limit to the length of the tail of the elastic thread spool package, and the length can be set through a mechanism such as a winder for winding the elastic thread; usually, the tail is wound around the tail winding groove in the paper tube At least two times, more preferably at least three times, more preferably at least five times. There is no particular limit to the maximum number of times the wire is wound around the tail wrap groove in the paper tube, but often 10 will be sufficient.

The width of the tail winding groove in the present invention indicates its length in the axial direction of the paper tube, which can be measured by measuring the surface of the paper tube on the surface toward the paper tube in the direction of the thickness of the paper tube. The inwardly recessed part of the center of the tube can be easily determined. In particular, it is the length between the edges 18 of the tail wire, denoted W, wrapped around the groove in the schematic cross-sectional view of the groove in FIG. 8 . If the groove width is not constant along the circumferential direction, eg if there is a portion entering the groove that is wider than the rest of the groove, the average width of the groove is used.

As shown in Figure 8, the depth of the tail wire winding groove of the present invention is the position on the circle A of 50 μm. When the circle A is placed in the cross section of the groove as close as possible to the bottom of the groove, the distance between the circle and the corresponding The position on the outside 15 of the paper tube is the farthest. In other words, the depth is defined as D2 in FIG. 8 instead of D1.

The recess of the present invention is a concave section whose maximum width is larger than the width of the tail wire winding groove and whose maximum depth is larger than the depth of the tail wire winding groove, and is arranged above or placed on the tail wire winding groove in the paper tube Above the extension of the tail wrap groove. The depth of the recess is defined in a similar manner as the depth of the tail winding groove, and its maximum depth is the position in the recess having the maximum depth thus defined. The presence of a recess above the tail winding groove or an extension of the tail winding groove allows placement of the tail wound under the position of the tail winding groove in the reel package, thereby allowing for example the tail winding groove Use a clamp with an L-shaped hook to hook in the direction of the end and pull it out easily. Above the tail winding groove or the extension of the tail winding groove means the deepest part of the tail winding groove or the extension of the deepest part of the tail winding groove.

The shape of the indentation as seen from the surface of the paper tube may be polygonal, rectangular, generally triangular, circular, elliptical, or any other shape. Preferably at least one edge of the indentation or its diameter (if circular) intersects the deepest part of the tail winding groove as seen at least from the surface of the paper tube. Especially preferably, along the surface of the paper tube, the length in the circumferential direction where the tail winding groove overlaps with the recess is 1 to 10 mm, more preferably 2 to 5 mm. This is because this range allows the tail to be hooked and pulled out more easily in the direction of the end using a clamp with an L-shaped hook or the like.

The indentation preferably has a groove shape such that at least its length is greater than the width of the tail winding groove and intersects the circumferential direction perpendicular to the axis of the paper tube. The recess is given such a shape that the groove-shaped recess intersects the tail winding groove or an extension of the tail winding groove. This allows the tail to be hooked and pulled more easily in the direction of the end. Regarding the manner in which the groove-like indentations intersect, it is sufficient that at least part of the indentation overlaps the deepest position in the tail winding groove or the extension of the deepest position in the tail winding groove as described above; preferred Ground, the depth of the recess at the deepest position in the tail wire winding groove or the extension part of the deepest position in the tail wire winding groove is greater than the depth of the tail wire winding groove, and is more preferably the same as the entire length of the tail wire winding groove. The width overlaps. If the indentation overlaps the entire width of the tail winding groove, it is preferred that the indentation does not extend under the spool and can be designed according to the shape of the target spool package. Specifically, the position closer to the concave end of the reel is preferably 1 to 10 mm from the tail thread winding groove towards the center of the paper tube.

A groove intersecting a circumferential direction perpendicular to the axis of the paper tube if the indentation has a groove shape such that at least its length is greater than the width of the tail winding groove and intersects the circumferential direction perpendicular to the axis of the paper tube The indentation preferably extends to the end of the paper tube. This allows for easier hooking and pulling of the tail in the direction of the end using a clamp with an L-shaped hook or the like.

At least part of the indentation can pass through the paper tube. In this case, the position where the recess passes through the tube is preferably a position overlapping with the tail winding groove or an extension of the tail winding groove. This is because having the indentation through the paper tube at this location allows the tail to be pushed up and extracted from within the paper tube (16 in Figure 8).

For similar reasons, if the indentation has a groove shape such that at least its length is greater than the width of the tailwinding groove and intersects the circumferential direction perpendicular to the axis of the paper tube, the indentation preferably passes through the tailwinding indentation. Tube over the full width of the slot (W in Figure 8). In embodiments where the groove reaches the end of the paper tube, having the tube recessed through the entire length includes embodiments where the notch extends from the end of the paper tube.

Wrapping elastic cord around a paper tube having the above-described tail wrap grooves and indentations to form an elastic cord spool package produces a spool roll in which the tail is secured in the tail wrap groove and can be easily withdrawn Pack.

Although the present invention will be explained in more detail below using embodiments and examples, the present invention is not limited to these forms.

Example of Elastic Yarn Package The elastic yarn package uses a yarn with a net weight of 4.5 kg by winding 19 coils of 620 dtex polyurethane elastic yarn to the end yarn winding groove. In the slot, it is produced by winding onto the elastic yarn paper tube 7. The polyurethane elastic yarn is made of 56 unit filaments and the average diameter of the elastic yarn is 0.33 mm. The elastic yarn paper tube has a length of 175 mm, Paper tubes with a diameter of 82 mm, a surface circumference of 257 mm and a wall thickness of 4 mm, with a moisture-proof celufine film made of regenerated cellulose wound onto its surface , wherein the tail yarn winding groove 8 is cut in the range of 95% of the circumference of the paper tube, wherein the groove width is 4 mm. At this time, the length of the exposed portion of the paper tube on the side where the grooves existed in the elastic yarn roll layer package was 10 mm.

Example 1 A "Loop Lock" (registered trademark) made of nylon with a total length of 130 mm and a thickness of 0.8 mm in the straight part is used to form a part of the yarn bundle that passes through the tail yarn winding groove. The loops, and specifically, were passed through 10 windings in the elastic yarn ply package described above to create the elastic yarn ply package (FIGS. 2-2).

Example 2 An "Insulock" (registered trademark) made of nylon with a total length of 100 mm, a width of the ribbon-shaped part of 2.6 mm, and a thickness of 0.8 mm was used to form a winding groove formed through the tail yarn A loop of a portion of the yarn bundle above, and specifically, passed through eight windings to produce an elastic yarn lap package (Figures 2-3).

Example 3 In the elastic yarn roll layer package described above, one "Looplock" (registered trademark) made of nylon and having a total length of 265 mm and a thickness of 0.8 mm in the linear portion was used to form A loop was passed through a portion of the yarn bundle formed on the tail winding groove, and specifically, 10 windings were passed through to create an elastic yarn roll layer package (FIG. 4).

Reference Example 1 Nineteen windings of a 620 dtex polyurethane elastic yarn with 56 individual filaments having an average elastic yarn diameter of 0.33 mm were wound onto a paper tube 1 in a tail winding groove, The polyurethane elastic yarn roll layer package was produced by using 4.5 kg net weight of yarn (Fig. 2-1).

Reference Example 2 The same tape-shaped object as in Embodiment 2 was used on the paper tube 1 to form the part of the yarn bundle passing through the eight windings formed above the tail yarn winding groove (where the groove was not cut). The loop where the tail yarn is bundled to create the elastic yarn lap body package (Figs. 2-4).

For the respective polyurethane elastic yarn rolls of Reference Examples 1 and 2 and Examples 1 to 3, Table 1 shows a comparison of the convenience of picking up the tail yarn by an operation in which the tail yarn is manually grasped the result. At this time, after evaluation (where "O" is evaluated if the retrieval is easy, "∆" if the retrieval is slightly worse, and "X" if the retrieval is difficult), the tail Yarns were easier to pick up in Examples 1 to 3 than in Reference Example 1 and Reference Example 2.

表2

Given in Table 2 for reference example 2 and embodiment 2 is to pick up the tail yarn (as in Fig. 1C and Fig. 1B) and measure the length (Fig. 1C and Fig. Results of L) in Fig. 1B. It is clear that when the yarn bundle is fully tightened, there is variability in the length of the tail yarn, which will have a negative impact on the operation in the processing equipment, where loose bundles produce excellent results. Table 1

Table 2

Example of a paper tube Paper tube 1: Tail grooves with a groove width of 4 mm and a groove depth D1 of 2.5 mm were cut around the entire circumference of an elastic wire paper tube with a diameter of 175 mm. Width, diameter of 82 mm, surface circumference length of 257 mm and thickness of 4 mm and wrapped with a moisture-proof celuline film made of regenerated cellulose (paper tube 1 in FIG. 9 ).

Paper tube 2: Tail grooves with a groove width of 4 mm and a groove depth D1 of 2.5 mm were cut around 95% of the entire circumference of an elastic wire paper tube having a width of 175 mm, 82 mm in diameter, 257 mm in surface circumference and 4 mm in thickness and wrapped with a moisture-proof celuline film made of regenerated cellulose (paper tube 2 in FIG. 9 ).

Example 1 has a maximum length of 8 mm, a depth of 3 mm, and a depth of 3 mm at a position on the paper tube 1 as shown in Figure 9, which is perpendicular to the position above the tail wire groove and is arranged in the tail wire winding direction. The width of mm is recessed such that the side of the recess extends to the end of the paper tube, thereby producing the paper tube 1-1. A 620 dtex polyurethane elastic thread with a filament count of 56 and an average elastic thread diameter of 0.33 mm was wrapped 19 times around the tail groove in the paper tube 1-1 to produce a polyamide with a net weight of 4.5 kg of thread. Urethane elastic cord package. The length of the exposed end of the spool package where the groove is present is 10 mm.

Example 2 is set at a position on the paper tube 1 as shown in Figure 9 and is perpendicular to the position above the tail wire groove and has a maximum side length of 8 mm and a width of 3 mm in the tail wire winding direction. Grooves were cut, whereby paper tubes 1-2 were created, and polyurethane elastic cord packages were obtained as in Example 1, except that this paper tube would be used.

Example 3 A through hole with a concave diameter of 6 mm is provided at a position above the tail groove in the paper tube 1 as shown in FIG. 9, thereby producing paper tubes 1-3, and as in Example 1 Get the same polyurethane elastic cord roll, except this paper tube will be used.

Example 4 is set at a position perpendicular to the extension of the tail groove in the section formed by 5% of the total circumference of the paper tube 2 without the tail groove. A recess of maximum length of 8 mm, depth of 3 mm and width of 3 mm such that one side of the recess extends to the end of the paper tube as shown in Figure 9 to obtain the paper tube 2-1, as in Example 1 Get the same polyurethane elastic cord roll, except this paper tube will be used.

Example 5 is set at a site that is orthogonal to the extension of the tail groove in the segment consisting of 50% of the total circumference of the paper tube 2 without the tail groove (as shown in FIG. 9 ) Cut grooves with a maximum side length of 8 mm and a width of 3 mm in the tail winding direction to obtain paper tube 2-2, and to obtain a polyurethane elastic thread package as in Example 1, except that Paper tubes will be used outside.

Example 6 At a location orthogonal to the extension of the tail groove in the segment consisting of 5% of the total circumference of the paper tube 2 in which there is no tail groove (as shown in FIG. 9 ) A through hole with a concave diameter of 6 mm was provided to obtain paper tubes 1-3, and a polyurethane elastic thread package was obtained as in Example 1, except that this paper tube would be used.

Table 3 shows the results of comparing the convenience of extracting the tail by manually pinching the tail from the polyurethane elastic thread packages of Comparative Examples and Examples 1-6 or by using The tail wire was pulled out by the jig of the L-shaped hook obtained by bending a wire 100 mm long and 0.5 mm in diameter. The ○ indicator line can be easily extracted, the △ indicator line is slightly difficult to extract, and the × indicator line cannot be easily extracted. Lines can be extracted more easily in Examples 1-6 than in Comparative Examples.

參考符號之解釋 1：線狀物件 2：尾紗 3：帶狀物件 4：其中尾紗完全緊密地成束之帶狀物件 5：經捲繞至紙管之尾紗捲繞凹槽中之尾紗的紗束 6：環圈長度長於紙管之周長的線狀物件 7：紙管 8：尾紗捲繞凹槽 9：彈性紗卷層體 10：鉛紗 11：附接至線狀物件之標記 12：用於撕裂之穿孔 13：尾線纏繞凹槽 14：紙管端部表面 15：紙管之外部 16：紙管之內部 17：紙管之軸向方向 18：尾線纏繞凹槽之邊緣 A：尾紗捲繞方向 L：經拉出尾紗之長度 Comparative Example 1 A 620 dtex polyurethane elastic thread with 56 filament counts and an average elastic thread diameter of 0.33 mm was wound 19 times around the tail groove in paper tube 1 to produce a thread with a net weight of 4.5 kg. Packaged in polyurethane elastic cord. table 3

Explanation of Reference Symbols 1: Thread-shaped object 2: Tail yarn 3: Ribbon-like object 4: Ribbon-like object in which the tail yarn is completely and tightly bundled 5: Tail wound into the tail yarn winding groove of the paper tube Bundle of yarn 6: Thread with loop length longer than the circumference of the paper tube 7: Paper tube 8: Tail winding groove 9: Elastic yarn roll layer 10: Lead yarn 11: Attached to the thread Marking 12: Perforation for tearing 13: Tail winding groove 14: Paper tube end surface 15: Outside of paper tube 16: Inside of paper tube 17: Axial direction of paper tube 18: Tail winding groove The edge of the groove A: tail yarn winding direction L: the length of the tail yarn pulled out

1‧‧‧Linear Object 1-1‧‧‧Paper Tube 1-2‧‧‧Paper Tube 1-3‧‧‧Paper Tube 2‧‧‧Tailing 2-1‧‧‧Paper Tube 2-2‧‧ ‧Paper tube 3‧‧‧Ribbon-like object 4‧‧‧Ribbon-shaped object in which the tail yarn is completely tightly bundled 5‧‧‧The bundle of tail yarn wound into the tail yarn winding groove of the paper tube 6‧‧‧Linear object whose loop length is longer than the circumference of the paper tube 7‧‧‧Paper tube 8‧‧‧Tailing yarn winding groove 9‧‧‧Elastic yarn roll layer 10‧‧‧Lead yarn 11‧ ‧‧Markers attached to threadlike objects 12‧‧‧Perforations for tearing 13‧‧‧Tail winding grooves 14‧‧‧Paper tube end surface 15‧‧‧Outside of paper tube 16‧‧‧ Inside of the paper tube 17‧‧‧Axial direction of the paper tube 18‧‧‧The edge of the tail thread winding groove A‧‧‧The tail yarn winding direction D1‧‧‧The depth of the groove L‧‧‧After pulling out the tail yarn Length W‧‧‧groove width

Fig. 1A is a schematic diagram depicting a state in which a tail yarn has been pulled out by a thread-like object held by a tail yarn of an elastic yarn roll body package according to the present invention. Fig. 1B is a schematic diagram depicting a state in which a tail yarn is pulled out from a tape-shaped object held by a tail yarn of an elastic yarn roll body package according to the present invention. Fig. 1C is a schematic diagram depicting a state in which the tail yarn used in the reference example is pulled out. 2-1 to 2-4 are schematic diagrams depicting elastic yarn roll layer packages used in Examples 1 and 2 and Reference Examples 1 and 2. Fig. 3 is an enlarged view of the tail yarn part in Fig. 2-2. Figure 4 is a schematic diagram depicting the elastic yarn roll layer package used in the third embodiment. Figure 5 is a schematic diagram depicting the paper tube and the entire layer package of elastic yarn according to the present invention. Figures 6-1 to 6-5 are schematic diagrams depicting examples of elastic yarn roll layer packages in which markers are attached to threadlike objects. Figures 7a-1, 7a-2, 7b-1 and 7b-2 provide schematic illustrations of conventional paper tubes. FIG. 8 is a schematic illustration of an example of a cross-section of a tail winding groove of the present invention. Figure 9 is a schematic illustration of paper tubes used in Examples and Comparative Examples.

1‧‧‧Linear objects

2‧‧‧tail yarn

L‧‧‧The length of the tail yarn after pulling out

Claims (7)

An elastic yarn ply package comprising a paper tube and an elastic yarn ply, wherein: the paper tube has an angle between an end portion of the elastic yarn ply body and an end portion of the paper tube perpendicular to A groove in the circumferential direction of the axis of the paper tube; the end yarn of the elastic yarn roll body is wound into the groove; and a linear object or a strip-shaped object passing through at least a part of the yarn bundle of the end yarn In this way, it is held, wherein the thread-like object or ribbon-like object is ring-shaped; and the yarn bundle of the tail yarn is a loose bundle. The elastic yarn roll layer package as claimed in claim 1, wherein: the loop length of the thread-shaped object or the strip-shaped object forming the ring shape is longer than the circumference of the paper tube, and the paper tube is set in which the paper tube is placed on the ring In the state of the circle. The elastic yarn roll layer package according to claim 1 or 2, wherein: the material of the thread-shaped object or the strip-shaped object is flexible. The elastic yarn roll layer package according to claim 1 or 2, wherein: the thread-shaped object or the tape-shaped object is attached with at least one mark. A paper tube comprising, near at least one end, a tail winding groove having parallel edges along a circumferential direction perpendicular to the axis of the paper tube, the paper tube being wound around the tail The groove or the extension of the tail winding groove contains a recess above the maximum width of the recess greater than the width of the tail winding groove and its deepest part is deeper than the tail winding groove, wherein the recess has a groove shape such that at least one side is larger than the width of the tail winding groove and perpendicular to the The circumferential direction of the axis of the paper tube intersects, wherein the groove-shaped indentation is orthogonally arranged in the tail wire winding groove or an extension of the tail wire winding groove, and wherein the groove-shaped indentation Reach the end of the paper tube. The paper tube according to claim 5, wherein at least part of the recess passes through the paper tube. An elastic yarn roll layer package, which includes a paper tube according to claim 5 or 6, and a tail thread is fixed in the tail thread winding groove.

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