JPH0630179U - Melt bonded core yarn - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a melt-bonded core yarn for preventing fraying, which has a good texture and feel to the skin, can maintain a high heat fusion force, and can select a material according to the knitted fabric, and is low in cost. A melt-bonded core yarn comprising an elastic yarn as a core, the periphery of which is surrounded by a non-elastic fiber aggregate consisting of short heat-fusion fibers and short non-heat-fusion fibers extending in the direction of the elastic yarn.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a melt-bonded core yarn used as a melt-bonded yarn for use in preventing fraying of a knitting end portion of a knitted fabric or an ear portion of the knitted fabric.

[0002]

[Prior art]

 Conventionally, various means have been implemented to prevent the frayed portion at the end of knitting when knitting a knitted fabric. One of them is braiding of stitches by a linking machine. The stitching by the above-mentioned linking machine is such that the stitches stitched together are beautifully bound, but the work of hanging each stitch on the needle one by one has to be done manually, and the workability is extremely poor.

[0003] Therefore, in a few courses at the end of knitting, a fused adhesive yarn that is melted by heating and fixed at room temperature is knitted, the yarn is melted by heating, and the contact point of the loop of the non-melted yarn is fixed by the melted yarn. Therefore, the workability is improved.

For example, as shown in FIG. 4, the melt-bonded yarn 50 is formed by twisting the circumference of one core material 51 with a hot-melt yarn that is melted by heating and fixed at room temperature. M / C, 1/20 Z twist 1000 T / M 100% acrylic yarn is thread-dyed, and two yarns and 210 D polyurethane elastic yarn are twisted into 600 T / M S-twist. Separately, 100D hot melt yarn and 400T / M Z twist are twisted together to obtain a melt adhesive yarn. As described above, the conventional melt-bonded yarn 51 is twisted with the hot-melted yarn after the twisted yarn 52 and the polyurethane elastic yarn 53, which are the core yarns 50, are twisted, and the twist changes from Z → S → Z. However, the fibers constituting the core yarn 51 are not untwisted so much, and the hot-melted yarn finally twisted by tightening due to the contraction of the elastic yarn 53 is inside the fiber when melted by heat setting. Does not enter and remains as a clump 54 on the surface of the yarn, which deteriorates the feel of the knitted fabric and the texture on use. The heat fusion force of this yarn is 215 g. Here, the heat fusion force is represented by the strength (g) until the yarn end is pulled after heat setting to loosen the yarn or break the yarn.

The heat fusion strength of the treated portion increases with an increase in the content of the heat fusion yarn, but the texture is inevitably deteriorated accordingly. In addition, since heat-melting yarn is not a general-purpose product, there is little room for selection of type, thickness, etc., and the cost is also relatively high, and the melt-bonding yarn using this is also relatively expensive.

[0006]

[Problems to be solved by the device]

 In view of the above points, the present invention is used as a melt-bonding yarn for preventing fraying, which has a good feel and feel to the skin, can maintain a high heat-sealing force, has a wide range of choices such as type and thickness, and is inexpensive in cost. The aim is to obtain a melt-bonded core yarn.

[0007]

[Means for Solving the Problems]

 The above-mentioned problem is solved by a melt-bonded core yarn that is surrounded by an inelastic fiber aggregate composed of an elastic yarn and a heat-bonding short fiber and a non-heat-bonding short fiber that surround the elastic yarn as a core. . Further, it is preferable that the total amount of the heat-fusible short fibers is 15 to 50%, and when the heat-fusion short-fibers are used as the colored yarn, the heat-fusion short fibers use the dyed cotton to solve the above problems.

[0008]

[Action]

 The melt-bonded core yarn of the present invention is a spun core yarn in which an elastic yarn is used as a core, and the periphery thereof is surrounded by a non-elastic fiber aggregate composed of heat-fusible short fibers and non-heat-fusible short fibers. Since the yarn is fed in a stretched state until the end of knitting, the elastic yarn tries to reduce its length when the tension of the elastic yarn is released after knitting. For this reason, the non-elastic fiber aggregate surrounding the bulky elastic yarn is further loosened and swells, and voids are formed between the non-elastic fiber aggregates.

When the knitted fabric is heat-treated in this state, the melt-bonded heat-bonded short fibers are dispersed in various places and gather in dots, and the melt-bonded short-fibers are melted between the expanded short-fibers and covered with the expanded short-fibers. Therefore, it does not damage the feel and feel.

FIG. 1 shows an example of an apparatus for producing the melt-bonded core yarn of the present invention.

[0011]

【Example】

 An embodiment of the melt-bonded core yarn 1 of the present invention will be described below.

In an embodiment, the melt-bonded core yarn 1 of the present invention is obtained as a spun core yarn produced by the spun core yarn manufacturing apparatus 2 shown in FIG. The spinning core yarn manufacturing device 2 includes a normal spinning device 4 and an elastic yarn supplying device 5. The spinning device 4 includes a draft part 12 including a back roller pair 9, a middle roller pair 10, and a front roller pair 11 and a ring twisting portion, which are provided along the passage of the roving 8 guided from the shino winding 7 by the trumpet 6. It consists of 13. The elastic yarn supplying device 5 has a tubular guide 16 for guiding the elastic yarn 15 drawn out from the elastic yarn package 14 and a tension adjusting device (not shown) if necessary. The elastic yarn package 14 is placed on the pair of rolls 17 and the yarn feeding speed is regulated.

The melt-bonded core yarn 1 is manufactured by the spinning core yarn manufacturing apparatus 2 as follows.

The roving 8 drawn out from the Shino winding 7 is made by mixing the heat-bonding short fibers 19 and the non-heat-bonding short fibers 20 in a predetermined ratio in advance, and guides them to the back roller pair 9 via the trumpet 6. While being drafted by the draft part 12, the elastic yarn 15 is fed from the tubular guide 16 which is opened on the upstream side of the front roller pair 11 during this period. At this time, the elastic yarn 15 is appropriately tensioned by controlling the rotation of the roller 17 or by a tension adjusting device (not shown), and is placed at the center position of the drafted belt-shaped roving yarn 8 as shown in FIG. 1B. The yarn is fed in the stretched state. The elastic yarn 15 and the roving yarn 8 exiting from the front roller pair 11 are twisted at the ring twisting portion 13 through the balloon portion 3, and the elastic yarn 15 is made by the fiber assembly 18 constituting the roving yarn 8. A melt-bonded core yarn 1 having a core as the core is surrounded.

Specific examples of the melt-bonded core yarn of the present invention are shown below. (Example 1) 64% of dyed cotton of 3D, average fiber length of 105 m / m, 100% acrylic (total weight ratio), and 28% of 3D, polyolefin-based heat-bonded short fibers of average fiber length of 64 m / m (Total weight ratio) and the fiber aggregate of the sheath portion, 210D polyurethane elastic yarn 8% (total weight ratio) as the core yarn, and the number of twists 400T / M and the spinning count M / C1 / 10 It is spun as a spun core yarn to obtain a melt-bonded core yarn of the present invention, and the heat fusion force of the yarn is 290 g, which is sufficiently effective for preventing fraying.

Example 2 3D, 59% (total weight ratio) of 100% acrylic dyed cotton with an average fiber length of 105 m / m (total weight ratio), and 2D, a short polyester heat fusion bond with an average fiber length of 51 m / m Fibers 25% (whole weight ratio) to form a fiber aggregate in the sheath portion, 210D polyurethane elastic yarn 16% (whole weight ratio) to be the core yarn, and spun count M / C1 / at a twist number of 700 T / M. Twenty spun core yarns were spun out to obtain the melt-bonded core yarn of the present invention, and the thermal fusion force of the yarn was 200 g, which was sufficiently effective in preventing fraying.

The above-mentioned heat-fusion-bonded short fibers are of a single type or a composite type, for example, a polyolefin type that melts at 100 ° C. to 130 ° C. in dry heat and 80 ° C. to 100 ° C. in wet heat (for example, UC manufactured by Ube Nitto Kasei Kogyo). , ES manufactured by Chitso, etc., low melting point polyester type (for example, Kuraray Sofit, Unitika Melty, Mitsubishi Rayon Solster, Kanebo Bellcombi, Toyobo Estenal, etc.) polyamide type, etc. are used.

When the fused adhesive core yarn of the example is used to prevent the edges of the knitted fabric from fraying, the yarn is knitted in several courses including the final course of the knitted fabric. At this time, the melt-bonded core yarn is in a tensioned state until knitting, and after knitting, the knitted fabric is heat set. As a result, the heat-bonded short fibers of the melt-bonded core yarn that have been knitted are melted and dispersed at various points, gathering in dots, and the elastic yarn shrinks. At the contact points of adjacent groups woven in several courses, the heat-sealing short fiber members are fused and sufficient heat-sealing force is obtained. As shown in FIG. 3, when the elastic yarn contracts, the fiber assembly 18 in the sheath portion surrounding the elastic yarn swells, is refracted and swelled, and the melt heat-sealing short fibers are solidified into a small lump shape, and the dispersion point is distributed over the whole. The small lumps 24 are in a state of being covered with the expanded non-heat-bonding short fibers 25. As a result, the small lumps 24 of the melt heat-bonded short fibers located on the surface of the knitted fabric are hard to come into direct contact with the skin due to the expanded non-heat-bonded short fibers 25.

In this case, a slight difference can be seen in the state after heat setting depending on whether the heat-fusible short fibers are a single type or a composite type. That is, in the single type, the entire heat-sealing short fiber is melted and finely dispersed, whereas in the composite type, the sheath (low melting point) that constitutes the heat-sealing short fiber is melted and the core is melted. It is considered that the part (high melting point part) remains and the fibers stick to each other, hindering the freeness of the whole yarn and contributing to the improvement of the heat fusion force.

As the non-heat-fusible short fibers of the sheath portion used in the melt-bonded core yarn of the present invention, various spinnable natural fibers, artificial fibers alone or in combination are used depending on the application. However, cotton, rayon, wool, and acrylic are particularly suitable for knitting fabrics. The heat-fusible short fibers used in the present melt-bonded core yarn are preferably used in the range of 15 to 50% in terms of the total weight ratio, but 20 to 40% in terms of the balance between heat-bonding force and feeling. Is particularly preferable. If it is less than this, the heat-sealing force may be insufficient, and if it is more than this, the texture may deteriorate.

The spinning core yarn manufacturing apparatus for manufacturing the melt-bonded core yarn of the present invention may be another apparatus other than the apparatus shown in FIG. 1, and both long fibers and short fibers can be applied, depending on the purpose of use and material. Select appropriately. When used as a colored yarn, the non-heat-bonded short fibers are dyed in advance in the raw material stage because the heat-bonded short fibers are fused in the dyeing process in post-dyeing, which is dyed after knitting the knitted fabric. It is necessary to use.

[0022]

[Effect of device]

With the above-described structure, the melt-bonded core yarn of the present invention has the effect that the melted heat-bonded short fibers do not easily come out on the surface of the knitted fabric, so that the texture is good and the touch is good, and the heat-bonding force can be kept high. In addition to being able to obtain a fabric edge that does not fray easily,
Various materials can be selected according to the applied knitted fabric, and cost reduction can be achieved.

[Submission date] October 27, 1992

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

For example, as shown in FIG. 4, the melt-bonded yarn 50 is formed by twisting the circumference of one core material 51 with a hot-melt yarn that is melted by heating and fixed at room temperature. M / C, 1/20 Z twist 1000 T / M 100% acrylic yarn is thread-dyed, and two yarns and 210 D polyurethane elastic yarn are twisted into 600 T / M S-twist. Separately, 100D hot melt yarn and 400T / M Z twist are twisted together to obtain a melt adhesive yarn. As described above, the conventional melt-bonded yarn 50 is twisted with the hot-melted yarn after twisting the dyed yarn 52 as the core material 51 and the polyurethane elastic yarn 53, and the twist changes from Z → S → Z. However, the fibers constituting the core material 51 are not untwisted so much, and the hot-melted yarn finally twisted by tightening due to the contraction of the elastic yarn 53 is inside the fiber when melted by heat setting. Does not enter and remains as a clump 54 on the surface of the yarn, which deteriorates the feel of the knitted fabric and the texture on use. The heat fusion force of this yarn is 215 g. Here, the heat fusion force is represented by the strength (g) until the yarn end is pulled after heat setting to loosen the yarn or break the yarn.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

When the fused adhesive core yarn of the example is used to prevent the edges of the knitted fabric from fraying, the yarn is knitted in several courses including the final course of the knitted fabric. At this time, the melt-bonded core yarn is in a tensioned state until knitting, and after knitting, the knitted fabric is heat set. As a result, the heat-bonded short fibers of the melt-bonded core yarn that have been knitted are melted and dispersed at various points, gathering in dots, and the elastic yarn shrinks. Heat Chakutan fibers in contact Lulu-loop be adjacent woven into a number course is fused enough heat force application can be obtained. As shown in FIG. 3, the fiber aggregate 18 in the sheath portion surrounding the elastic yarn swells due to the contraction of the elastic yarn, and is in a refraction and expansion state, and the melt heat-sealing short fibers are solidified into a small lump shape, and the dispersion point is distributed over the whole. The small lumps 24 are in a state of being covered with the expanded non-heat-bonding short fibers 25. As a result, the small lumps 24 of the melt heat-bonded short fibers located on the surface of the knitted fabric are hard to come into direct contact with the skin due to the expanded non-heat-bonded short fibers 25.

[Brief description of drawings]

FIG. 1A is a schematic side view showing an apparatus for manufacturing a melt-bonded core yarn according to an embodiment of the present invention, and B is a schematic plan view of the front roller pair portion.

FIG. 2 is a schematic front view showing the melt-bonded core yarn before heating of the example.

FIG. 3 is a schematic front view showing stitches formed by the melt-bonded core yarn of the present invention after heating.

FIG. 4 is a schematic front view showing a stitch formed by a conventional melt-bonded yarn after heating.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Melt-bonded core yarn 15 Elastic yarn 18 Non-stretchable fiber aggregate 19 Heat-bonded short fiber 20 Non-heat-bonded short fiber 24 Small lump of melt-heat-bonded short fiber 25 Puffed non-heat-bonded short fiber

[Procedure amendment]

[Submission date] October 27, 1992

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

2 is a schematic front view showing a hot-melt adhesive core yarn pressurized heat prior to the present invention. ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] March 22, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

Claims (3)

[Scope of utility model registration request] 1. A melt-bonded core yarn comprising an elastic yarn as a core and surrounding the periphery thereof with a non-elastic fiber aggregate composed of heat-fusible short fibers and non-heat-fusible short fibers extending in the direction of the elastic yarn. 2. The melt-bonded core yarn according to claim 1, wherein the heat-melt-bonded short fibers are 15 to 50% in total weight ratio. 3. The melt-bonded core yarn according to claim 1 or 2, wherein the non-heat-melt-bonded short fibers are made of yarn-dyed cotton.