Yarn and fabric formed using said yarn

Abstract

To provide a yarn from which a fabric excellent in impact absorption capability is produced, and a fabric having excellent impact absorption capability.SOLUTION: A yarn 10 includes a material 11 having impact absorption capability, and a sheath thread 12 having solubility or sublimability, which covers the material 11 such that the extended state of the material 11 is held. A fabric is formed from the yarn 10.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to the art of yarns and fabrics formed using said yarns. [Background technology]

[0002] Conventionally, techniques for producing yarns with high resilience fabrics have been publicly known, as described in Patent Document 1, for example.

[0003] Patent Document 1 discloses a composite twisted yarn made by twisting together three types of yarn: a spun yarn, a polyurethane elastic yarn, and a water-soluble yarn. When this composite twisted yarn is used to form a fabric (woven or knitted fabric), removing the water-soluble yarn from the woven or knitted fabric makes it possible to obtain a woven or knitted fabric with strong resilience. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4204498 Summary of the Invention [Problem to be solved by the invention]

[0005] Although Patent Document 1 mentions repulsion force, it does not mention anything about shock absorption.

[0006] The present invention has been made in view of the above circumstances, and the problem to be solved by the present invention is to provide a yarn that exhibits excellent impact absorption properties when made into fabric, and a fabric having excellent impact absorption properties. [Means for solving the problem]

[0007] The problem to be solved by the present invention is as described above, and the means for solving this problem will now be described.

[0008] That is, the yarn according to the present invention comprises a material having impact absorption properties and a sheath yarn having solubility or sublimability that covers the material so as to maintain the stretched state of the stretched material. The material is in a gel state. It is something. By configuring it in this way, when the sheath yarn is removed from the fabric, the stretched state is released, and excellent shock absorption properties can be exhibited. Furthermore, by configuring it in this way, it is possible to effectively exhibit excellent shock absorption properties when made into a fabric.

[0009] Furthermore, the material may have a diameter of 0.1 mm to 8.0 mm when in its natural state, not in the stretched state. By configuring it in this way, it is possible to effectively exhibit excellent shock absorption properties when made into a fabric.

[0010] The material may have a diameter of 0.05 mm to 4.0 mm when in the stretched state. By configuring it in this way, it is possible to effectively exhibit excellent shock absorption properties when made into a fabric.

[0011] The thread according to the present invention may have a diameter of 0.05 mm to 4.0 mm. By configuring it in this way, it can be easily woven by a textile machine, and when made into a fabric, it can effectively exhibit excellent shock absorption properties.

[0012] The thread according to the present invention may have a diameter of 2.0 mm to 4.0 mm. By configuring it in this way, it can be easily woven by a textile machine, and when made into a fabric, it can more effectively exhibit excellent shock absorption properties.

[0014] Furthermore, the fabric according to the present invention is fabric formed using the yarn according to any one of claims 1 to 6. By configuring in this way, it is possible to provide excellent shock absorption properties.

[0015] The fabric may be a knitted fabric, and the yarn may be used as a knitting yarn for knitting the knitted fabric. By configuring in this way, it is possible to effectively achieve excellent shock absorption properties.

[0016] The fabric may be a knitted fabric, and the yarn may be used as an inlay yarn. By configuring in this way, the knitted fabric having the inlay yarn can have excellent shock absorption properties.

[0017] The fabric may also be formed into a spacer fabric having a front knitted fabric and a back knitted fabric, and the yarn may be used as a connecting yarn that connects the front knitted fabric and the back knitted fabric. By configuring it in this way, when the material in a stretched state changes to its natural state, the yarn can be made to stand up between the front knitted fabric and the back knitted fabric, and excellent shock absorption can be achieved between the front knitted fabric and the back knitted fabric. [Effects of the Invention]

[0018] The present invention has the effect of providing a yarn that exhibits excellent impact absorption properties when made into fabric, and a fabric having excellent impact absorption properties. [Brief explanation of the drawings]

[0019] [Figure 1] 1A is a schematic diagram showing a preparation step, a drawing step, and a restraint step, of a yarn manufacturing process according to an embodiment of the present invention; [Figure 2] (a) A schematic diagram showing the knitting process in the manufacturing process of a fabric using the yarn according to one embodiment of the present invention, (b) A schematic diagram showing the dissolving process in the same manner, and (c) A schematic diagram showing the shrinking and filling processes in the same manner. [Figure 3] 10(a) is a schematic diagram showing the knitting step in the fabric manufacturing process according to another embodiment, and FIG. 10(b) is a schematic diagram showing the dissolving step and the shrinking and filling steps in the fabric manufacturing process according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0020] A yarn 10 according to one embodiment of the present invention, shown in FIG. 1(c), is a yarn for forming (manufacturing) a fabric. When made into a fabric, the yarn 10 exhibits excellent shock absorption properties. The yarn 10 and the manufacturing process for the yarn 10 will be described below with reference to FIG. 1. The manufacturing process for the yarn 10 mainly includes a preparation step S11, a drawing step S12, and a restraining step S13.

[0021] The preparation step S11 shown in FIG. 1(a) is a step of preparing a material 11. The material 11 is a longitudinal (thread-like) low-resilience material that has extensibility and shock absorption properties. Here, shock absorption properties refer to the property of absorbing externally applied shock. In this embodiment, a gel-like material (gel-like material) having a predetermined viscosity and made primarily of polyurethane, silicone, or the like is used as the material for the material 11.

[0022] The material for the base 11 is not limited to the gel-like material, but may be any low-resilience material that has extensibility and shock absorption properties, such as an impact-absorbing polymer. The material for the base 11 may also be one that changes shape slowly when subjected to low external pressure, dispersing the force without concentrating it in a specific area.

[0023] The blank 11 is formed to have a substantially circular cross section. Any size can be adopted as the diameter of the blank 11 depending on the application. In this embodiment, the diameter of the blank 11 is adopted to be 0.1 mm to 8.0 mm.

[0024] After the preparation step S11, the stretching step S12 is carried out.

[0025] The stretching step S12 shown in FIG. 1(b) is a step of stretching (extending) the material 11 prepared in the preparation step S11 in the longitudinal direction. More specifically, the stretching step S12 is a step of temporarily holding the material 11 in a state stretched in the longitudinal direction using a predetermined device. Note that, hereinafter, the state of the material 11 before stretching is referred to as the "natural state," and the state of the material 11 after stretching is referred to as the "extended state." As will be described later, the material 11 held in the stretched state has a smaller diameter than in the natural state because it has been stretched from the natural state.

[0026] The diameter of the material 11 held in a stretched state can be any size depending on the application. In this embodiment, the diameter of the material 11 held in a stretched state is set to 0.05 mm to 4.0 mm. In this way, stress (a force trying to contract) against the stretching tension is constantly acting on the material 11 held in a stretched state.

[0027] After the stretching step S12, the restraining step S13 is then performed.

[0028] The restraining step S13 shown in Fig. 1(c) is a step in which the material 11, which has been held in an elongated state in the drawing step S12, is restrained in the elongated state (so that the material 11 is maintained in the elongated state even after being removed from the predetermined device). In the restraining step S13, two sheath yarns 12 having the same diameter and material are used. In this embodiment, the two sheath yarns 12 are soluble water-soluble vinylon (water-soluble yarn).

[0029] Specifically, in the restraining step S13, as shown in FIG. 1(c), two sheath yarns 12 twisted in opposite directions are wound around the material 11, which is held in a stretched state by a predetermined device, in a spiral pattern in opposite directions toward one side in the longitudinal direction of the material 11. Here, FIG. 1(c) is a conceptual diagram of the restraining step S13; in reality, the two sheath yarns 12 are wound tightly around the material 11, as shown in the partial view indicated by reference symbol A. By winding the two sheath yarns 12 around the material 11 in this way, the material 11 held in a stretched state in the drawing step S12 is restrained by the two sheath yarns 12 in the stretched state even when the material 11 is released from the holding by the predetermined device. In other words, the stretched state of the material 11 is held (maintained).

[0030] As a result, as shown by symbol A in Figure 1(c), a single yarn 10 (double covered yarn) is produced in which the stretched material 11 is covered with two sheath yarns 12. As shown by symbol A, the yarn 10 is wound with the two sheath yarns 12 tightly (so that adjacent portions of the material 11 in the longitudinal direction are in close contact) so that the material 11 is not visible from the outside. In this way, the yarn 10 is formed so that almost the entire material 11 is covered from the outside and the material 11 is not exposed to the outside through the gaps between the coverings of the two sheath yarns 12.

[0031] This increases the contact area between the material 11 and the sheath yarn 12, and more reliably restricts the stretched state of the material 11. Furthermore, as described above, the viscous gel material (material 11) is not exposed to the outside, making it easier to handle the yarn 10 (for example, it can be used in textile machines such as flat knitting machines, which will be described later). The diameter of the yarn 10 can be any size depending on the application. In this embodiment, the diameter of the yarn 10 is from 0.05 mm to 4.0 mm.

[0032] It is preferable that the sheath yarn 12 be made by spun staple fibers rather than by spun long fibers. That is, if the sheath yarn 12 is made by spun long fibers, it has the property of shrinking more easily in the longitudinal direction than if it were made by spun staple fibers, for example, when it absorbs moisture from the surrounding area. Therefore, if the sheath yarn 12 shrinks in an unintended situation, it may affect (cause inconvenience to) the covering material 11. Therefore, by using the sheath yarn 12 by spun staple fibers, the above-mentioned inconvenience can be suppressed.

[0033] The fabric formed using the yarn 10 and the manufacturing process of the fabric will be described below with reference to Fig. 2. Note that the following description will be given assuming that the fabric is a rib knitted fabric 40 formed using the yarn 10 as an inlay yarn. The manufacturing process of the rib knitted fabric 40 mainly includes a knitting step S21, a dissolving step S22, and a shrinking / filling step S23.

[0034] The knitting step S21 shown in Fig. 2(a) is a step of knitting a rib knitted fabric using the yarn 10 as an inlay yarn. In the following, the rib knitted fabric (before completion) knitted in the knitting step S21 will be referred to as a rib knitted fabric 30 to distinguish it from the rib knitted fabric 40 (after completion) after the shrinking / filling step S23 has been performed. Fig. 2(a) is a cross-sectional schematic diagram of the knitted rib knitted fabric 30. For ease of explanation, Fig. 2(a) illustrates the yarn 10 in a state in which the material 11 is exposed (see Fig. 1(c)). That is, Fig. 2(a) is a conceptual diagram of the knitting step S21, and in reality, the two sheath yarns 12 are wound tightly together, and the material 11 is not exposed to the outside (see the partial view indicated by symbol A in Fig. 1(c)).

[0035] The rib knitted fabric 30 is knitted by a flat knitting machine. In the flat knitting machine, a knitting yarn 41 is passed between front and rear needle beds, and the rib knitted fabric 30 is knitted by the knitting yarn 41 so as to have knit stitches 42 and purl stitches 43. A shrinkable yarn is used as the knitting yarn 41. Specifically, the knitting yarn 41 is either an elastic yarn that has been paralleled together, or an elastic yarn that has been covered with a normal (ordinary) knitting yarn.

[0036] The rib knitted fabric 30 is knitted (inlaid) with the yarn 10 passing through the knitted fabric as a weft between the knit stitches 42 and the purl stitches 43. The position of the yarn 10 in the vertical direction (wale direction) in the rib knitted fabric 30 is fixed by a floating yarn (knitting yarn 41) (not shown) passing between the knit stitches 42 and the purl stitches 43. By repeating this knitting, it is possible to obtain a rib knitted fabric 30 in which the yarn 10 (inlay yarn) is arranged throughout. It is also possible to use multiple yarns 10 (inlay yarns) instead of one (single). This allows for a higher packing density.

[0037] After the knitting step S21 is performed, the dissolving step S22 is performed.

[0038] The dissolving step shown in Fig. 2(b) is a step of dissolving the sheath yarn 12 of the yarn 10 from the rib knitted fabric 30 (fabric) knitted in the knitting step S21. Specifically, the rib knitted fabric 30 is washed with a predetermined cleaning liquid such as water to dissolve the sheath yarn 12 covering the material 11 of the yarn 10. In this way, the yarn 10 is made up of only the material 11. As a result, the constraint of the stretched state of the yarn 10 (material 11) is released.

[0039] After the dissolving step S22, the shrinking and filling step S23 is carried out.

[0040] The shrinking / filling step S23 shown in FIG. 2(c) is a step in which, after the sheath yarn 12 of the yarn 10 is dissolved in the dissolving step S22, the yarn 10 (material 11) is shrunk and the shrunk material 11 is filled into the rib knitted fabric 30 (to make the material 11 thicker). Specifically, when the sheath yarn 12 of the yarn 10 is dissolved in the dissolving step S22 as described above, the constraint of the stretched state of the material 11 is released. Therefore, the material 11 naturally shrinks in the longitudinal direction due to the elastic force of the material 11 itself, and transitions from the stretched state to its natural state. In addition, a shrinkable yarn is used for the knitting yarn 41 of the rib knitted fabric 30 as described above. In this way, in the shrinking / filling step S23, the material 11 and the knitting yarn 41 of the rib knitted fabric 30 both shrink, thereby forming a rib knitted fabric 40 that is wider in the thickness direction of the fabric than the rib knitted fabric 30.

[0041] Thus, compared to the state before the shrinking / filling step S23 (i.e., the state of the rib knitted fabric 30), the rib knitted fabric 40 has a larger diameter yarn 10 (i.e., the material 11 in its natural state having shock absorption properties) arranged so as to span the fabric. In other words, the yarn 10 (material 11) can exhibit excellent shock absorption properties when made into the rib knitted fabric 40. Furthermore, the rib knitted fabric 40 having the inlay yarn (material 11) becomes a knitted fabric that contains a cushioning material, so to speak, and can have excellent shock absorption properties.

[0042] Furthermore, in this embodiment, the material 11 is a gel-like material with relatively high shock absorption. That is, the rib knit fabric 40 according to this embodiment uses the gel-like material (material 11) as a cushioning material, and therefore can effectively have excellent shock absorption. Furthermore, gel-like materials generally have a relatively high viscosity and are therefore unsuitable as materials for manufacturing fabrics using textile machines (e.g., knitting machines, looms, etc.). However, in this embodiment, the material 11 (gel-like material) is almost entirely covered from the outside by two sheath yarns 12 and manufactured as yarn 10. In this way, the material 11 (gel-like material) can be used as a material for manufacturing fabrics using textile machines, regardless of its viscosity.

[0043] Here, in general textile machines, an upper limit is set for the diameter of the yarn used. For example, in general flat knitting machines, the distance between the needle beds is mainly 5.0 mm or less. In contrast, in this embodiment, the diameter of the yarn 10 is 0.05 mm to 4.0 mm. That is, even if the diameter of the material 11 in its natural state is larger than the distance between the needle beds (i.e., the material 11 cannot be used in the flat knitting machine with its original diameter), the diameter is reduced when the fabric is produced, so it can be used in the flat knitting machine. In this way, since the yarn 10 is easy to knit and weave in a textile machine and the range of materials to choose from is wide, it is possible to select a yarn 10 that is suitable for producing fabric, and ultimately, when made into fabric, it is possible to effectively exhibit excellent shock absorption properties.

[0044] Furthermore, in this embodiment, the diameter of the material 11 held in a stretched state (the diameter of the material 11 covered with the sheath yarn 12) is adopted from 0.05 mm to 4.0 mm. That is, when manufacturing fabric, it is possible to use material 11 of an appropriate size, excluding materials that are excessively small or large for use in the fabric. This makes it possible to manufacture fabric from a material with relatively high shock absorption properties, in which the diameter of the material 11 held in a stretched state is appropriate. That is, when made into fabric, excellent shock absorption properties can be effectively exhibited.

[0045] In this embodiment, the diameter of the material 11 in its natural state is set to 0.1 mm to 8.0 mm. That is, when manufacturing fabric, a material 11 of an appropriate size can be used, excluding materials that are excessively small or large for use in the fabric. This allows fabric to be manufactured from a material with a relatively high shock absorption property and an appropriate diameter of the material 11 in its natural state. That is, when made into fabric, excellent shock absorption property can be effectively exhibited.

[0046] Furthermore, in this embodiment, the sheath yarn 12 constrains the fibers, which have a diameter of 0.1 mm to 8.0 mm in the natural state, to a diameter of 0.05 mm to 4.0 mm in the stretched state, thereby eliminating fibers that undergo excessive changes between the natural state and the stretched state. This allows fabric to be manufactured from a material that has a suitable change between the natural state and the stretched state and relatively high shock absorption. In other words, when made into fabric, excellent shock absorption can be effectively achieved.

[0047] Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and appropriate modifications are possible within the scope of the technical idea of ​​the invention described in the claims.

[0048] For example, in this embodiment, the sheath yarn 12 is water-soluble vinylon (water-soluble yarn), but is not limited to this. That is, the sheath yarn 12 may be, for example, a sublimation yarn that sublimes when heated, instead of a soluble yarn. This can prevent the sheath yarn 12 from absorbing moisture from the surrounding area. In this way, any material that can be removed by a predetermined method after the fabric is manufactured can be used as the sheath yarn 12.

[0049] In this embodiment, the yarn 10 is a double covered yarn in which two sheath yarns 12 are wound around the material 11 (core yarn), but this is not limited to this. For example, the yarn 10 can also be a single covered yarn in which one sheath yarn 12 is wound around the material 11 (core yarn). The yarn 10 can also be one in which three or more sheath yarns 12 are wound around the material 11. Furthermore, the yarn 10 may have the material 11 exposed to the outside between the coverings of the sheath yarn 12.

[0050] In addition, in this embodiment, knitted fabric is produced as the fabric, but this is not limited to this. That is, woven fabric may also be produced as the fabric. Furthermore, a flat knitting machine is used as the textile machine for producing the fabric, but this is not limited to this. That is, a warp knitting machine or a circular knitting machine can be used as the textile machine for knitted fabric, and a loom can be used for woven fabric. In this way, any textile machine can be used depending on the type of fabric to be produced.

[0051] Furthermore, in this embodiment, the yarn 10 is used as an inlay yarn, but this is not limiting. That is, the yarn 10 can also be used as a knitting yarn for making a knitted fabric. In this way, when a knitted fabric is knitted using only the yarn 10, the voids in the knitted fabric can function as relief areas when subjected to external pressure. In this way, when a knitted fabric is knitted using only the yarn 10, the shock absorption can be increased by the amount of the voids in the knitted fabric compared to, for example, a plate-like member made of a single material having shock absorption properties. Furthermore, when knitting a fabric using the yarn 10, not only a rib knitted fabric as in this embodiment but also any other knitted fabric can be knitted.

[0052] Furthermore, in this embodiment, the rib knitted fabric 40 is manufactured using the yarn 10 as an inlay yarn, but this is not limited to this. That is, any knitted fabric other than a rib knitted fabric can be knitted using the yarn 10 as an inlay yarn. For example, after knitting plain knitting (plain stitch structure) on one of the front and rear needle beds in a flat knitting machine, predetermined (e.g., even-numbered) stitches can be transferred to the other front and rear needle bed and set in the same way as the rib knitted fabric, thereby allowing the yarn 10 (inlay yarn) to pass through the knitted fabric.

[0053] Hereinafter, with reference to FIG. 3, a spacer fabric-like material formed using the yarn 10 and a manufacturing process for the material will be described as another embodiment.

[0054] The fabric shown in Fig. 3(b) is a spacer fabric-like fabric (hereinafter referred to as "spacer fabric 140" for convenience) formed using yarn 10. Note that hereinafter, the spacer fabric-like fabric knitted in knitting step S121 (before completion) will be referred to as spacer fabric 130 to distinguish it from the spacer fabric 140 (after completion) after undergoing the shrinking / filling step S23.

[0055] In the knitting step S121 shown in FIG. 3(a), the spacer fabric 130 is knitted on a flat knitting machine. The spacer fabric 130 has a knitted fabric portion 141 knitted with a highly elastic yarn such as rubber yarn, and a tuck portion 142 made of yarn 10. The knitted fabric portion 141 is provided in pair (front knitted fabric and back knitted fabric) so as to face each other at a distance. The tuck portion 142 (yarn 10) connects the pair of knitted fabric portions 141 (front knitted fabric and back knitted fabric). In other words, the yarn 10 is used as a connecting yarn that connects the pair of knitted fabric portions 141. The tuck portion 142 (yarn 10) is knitted in a zigzag pattern between the pair of knitted fabric portions 141.

[0056] In the dissolving step S122 shown in FIG. 3(b), the sheath yarn 12 of the yarn 10 is dissolved in the tuck portion 142. That is, the yarn 10 (material 11) is released from its stretched state in the tuck portion 142. Then, in the shrinking / filling step S123, the pair of knitted fabric portions 141 each shrink in the width direction of the fabric due to the high elasticity yarn, and the yarn 10 (material 11), which has been released from its stretched state in the tuck portion 142, increases in diameter and shrinks in the longitudinal direction. That is, the tuck portion 142 rises between the pair of knitted fabric portions 141, and the shape of the fabric (spacer fabric 130) itself changes so as to move the pair of knitted fabric portions 141 away from each other. In this way, a spacer fabric 140 is formed that is wider in the thickness direction of the fabric than the spacer fabric 130.

[0057] In the spacer fabric 140 thus formed, the pair of knitted fabric portions 141 are spaced apart from each other, and therefore have cushioning properties in the thickness direction of the fabric. In addition, the portion (tuck portion 142) connecting the pair of knitted fabric portions 141 is formed from the material 11 in its natural state, which has shock absorption properties, and therefore the spacer fabric 140 as a whole can have excellent shock absorption properties.

[0058] In the spacer fabric 140, the pair of knitted fabric portions 141 may not be knitted with high elasticity yarn, but may be knitted using yarn 10, such as the rib knitted fabric 40. This allows the spacer fabric 140 as a whole to have even better shock absorption properties.

[0059] The diameter of the thread 10 is not limited to 0.05 mm to 4.0 mm as described above, but can preferably be 2.0 mm to 4.0 mm. Here, when using a thread 10 with a relatively small diameter, such as 0.05 mm, it is expected that multiple threads will be used together rather than one at a time. In such cases, for example, when using the thread 10 as an inlay thread or when forming the spacer fabric 140 using the thread 10 as described above, handling can become cumbersome.

[0060] However, if the yarn 10 has a relatively large diameter, such as 2.0 mm to 4.0 mm, it can be used alone. For example, if it is difficult to knit the yarn 10 as is in a flat knitting machine, the yarn 10 can be pulled to make it thinner (reduced in diameter) and easier to knit. Furthermore, by knitting the yarn 10 in this thin form, the impact-absorbing yarn 10, which is originally large in diameter, can be fixed in a thin state in a flat knitting machine, circular knitting machine, or warp knitting machine, and can be knitted using knitting needles of the same size as ordinary yarns. Furthermore, in a general loom, the impact-absorbing yarn 10, which is originally large in diameter, can be woven without changing components such as the shuttle.

[0061] By setting the diameter of the thread 10 to 2.0 mm to 4.0 mm in this way, it is possible to select a thread 10 that is suitable for producing fabric, and in turn, when made into fabric, it is possible to more effectively exhibit excellent shock absorption properties. [Explanation of symbols]

[0062] 10. Thread 11. Materials 12 Sheath thread 40 rib knit

Claims

1. A material having shock absorption properties; a soluble or sublimable sheath yarn covering the stretched material so as to maintain the stretched state of the material; Equipped with The material is in a gel state. thread.

2. The material has a diameter of 0.1 mm to 8.0 mm when in a natural, non-stretched state. The yarn of claim 1.

3. the material has a diameter of 0.05 mm to 4.0 mm when in the stretched state; The yarn of claim 2.

4. The diameter of the thread is 0.05 mm to 4.0 mm. The yarn according to any one of claims 1 to 3.

5. The diameter of the thread is 2.0 mm to 4.0 mm. The yarn of claim 4.

6. A fabric formed using a yarn described in any one of claims 1 to 5.

7. The fabric is a knitted fabric, The yarn is used as a knitting yarn for knitting a knitted fabric. The fabric according to claim 6.

8. The fabric is a knitted fabric, The yarn is used as an inlay yarn. The fabric according to claim 6 or claim 7.

9. The fabric is formed into a spacer fabric having a front knitted fabric and a back knitted fabric, The yarn is used as a connecting yarn that connects the front knitted fabric and the back knitted fabric. The fabric according to any one of claims 6 to 8.

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