TOUGH YARN, KNITTED AND WOVEN FABRIC WITH CUTTING RESISTANCE AND GLOVE

Abstract

The invention provides a core yarn of a tough yarn for knitting and weaving a glove and the other knitted and woven fabric which are suitable for a worker using a cutting tool to wear, are excellent in a flexibility and an economic efficiency, prevent a folded end of a hard fiber from being exposed to apply a sense of discomfort to a wearer, and have a cutting resistance, and a tough yarn which uses the core yarn. A core yarn of a tough yarn is formed by compounding a hard fiber and a molten fiber, and fusion bonding the molten fiber to the hard fiber. Further, the tough yarn is formed by winding a winding yarn to the core yarn. A lower layer fiber may be further included between the hard fiber and the molten fiber.

Claims

1. A tough yarn comprising: a core yarn in which a hard fiber and a molten fiber are compounded; and a winding yarn which is wound to the core yarn, wherein the molten fiber wound reversely each other is fusion bonded to the hard fiber and the molten fiber is not fusion bonded to the winding yarn.

2. (canceled)

3. A core yarn of a tough yarn, wherein a hard fiber and a molten fiber are compounded and deposited to form the core yarn, the core yarn further comprises a lower layer fiber which is arranged between the hard fiber and the molten fiber and is made of a natural fiber or a synthetic fiber, and the molten fiber is fusion bonded to the hard fiber and the lower layer fiber which is not molten.

4. The core yarn according to claim 3, wherein the molten fiber is a fiber in which a melting temperature of a center portion in a cross section thereof is higher than a melting temperature of a peripheral portion, and only the peripheral portion is molten according to a heating treatment and is fusion bonded to the hard fiber.

5. A tough yarn comprising: a core yarn; and a winding yarn which is wound to the core yarn, wherein the core yarn is the core yarn according to claim 3, and the molten fiber is not fusion bonded to the winding yarn.

6. A tough yarn comprising: a core yarn; and a winding yarn which is wound to the core yarn, wherein the core yarn is the core yarn according to claim 3, and the molten fiber is also fusion bonded to the winding yarn which is not molten.

7. A knitted and woven fabric of the tough yarn according to claim 1, and another yarn which does not include the hard fiber, wherein the tough yarn appears more on one surface of the knitted and woven fabric, and the another yarn appears more on another surface of the knitted and woven fabric.

8. The knitted and woven fabric according to claim 7, wherein the another yarn is an elastic yarn.

9. A glove knitted by the tough yarn according to claim 1 and an elastic yarn, wherein the tough yarn appears more on an outer surface of the glove, and the elastic yarn appears more on an inner surface of the glove.

10. The tough yarn according to claim 1, wherein the molten fiber is a fiber in which a melting temperature of a center portion in its cross section is higher than a melting temperature of a peripheral portion, and only the peripheral portion is molten by a heating treatment so as to fusion bonded to the hard fiber

11. A tough yarn comprising: a core yarn; and a winding yarn which is wound to the core yarn, wherein the core yarn is the core yarn according to claim 4, and the molten fiber is not fusion bonded to the winding yarn.

12. A tough yarn comprising: a core yarn; and a winding yarn which is wound to the core yarn, wherein the core yarn is the core yarn according to claim 4, and the molten fiber is also fusion bonded to the winding yarn which is not molten.

13. A knitted and woven fabric of the tough yarn according to claim 5, and another yarn which does not include the hard fiber, wherein the tough yarn appears more on one surface of the knitted and woven fabric, and the another yarn appears more on another surface of the knitted and woven fabric.

14. The knitted and woven fabric according to claim 13, wherein the another yarn is an elastic yarn.

15. A knitted and woven fabric of the tough yarn according to claim 6, and another yarn which does not include the hard fiber, wherein the tough yarn appears more on one surface of the knitted and woven fabric, and the another yarn appears more on another surface of the knitted and woven fabric.

16. The knitted and woven fabric according to claim 15, wherein the another yarn is an elastic yarn.

17. A knitted and woven fabric of the tough yarn according to claim 10, and another yarn which does not include the hard fiber, wherein the tough yarn appears more on one surface of the knitted and woven fabric, and the another yarn appears more on another surface of the knitted and woven fabric.

18. The knitted and woven fabric according to claim 17, wherein the another yarn is an elastic yarn.

19. A glove knitted by the tough yarn according to claim 5 and an elastic yarn, wherein the tough yarn appears more on an outer surface of the glove, and the elastic yarn appears more on an inner surface of the glove.

20. A glove knitted by the tough yarn according to claim 6 and an elastic yarn, wherein the tough yarn appears more on an outer surface of the glove, and the elastic yarn appears more on an inner surface of the glove.

21. A glove knitted by the tough yarn according to claim 10 and an elastic yarn, wherein the tough yarn appears more on an outer surface of the glove, and the elastic yarn appears more on an inner surface of the glove.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0024] FIG. 1 is a block diagram showing a step of manufacturing a tough yarn according to first and second embodiments.

[0025] FIG. 2 is a schematic cross sectional view of a core yarn according to the first embodiment.

[0026] FIG. 3 is a schematic cross sectional view of a core yarn according to the second embodiment.

[0027] FIG. 4 is a schematic side elevational view showing a coating treatment according to the first embodiment.

[0028] FIG. 5 is a block diagram showing a step of manufacturing a tough yarn according to a third embodiment.

[0029] FIG. 6 is a schematic side elevational view showing a compound processing according to the third embodiment.

[0030] FIG. 7 is a schematic cross sectional view of a core yarn according to the third embodiment.

[0031] FIG. 8 is a schematic side elevational view showing a coating treatment according to the third embodiment.

[0032] FIG. 9 is a schematic side elevational view showing a compound processing according to a fourth embodiment.

[0033] FIG. 10 is a block diagram showing a step of manufacturing a tough yarn according to a fifth embodiment.

[0034] FIG. 11 is a schematic side elevational view showing a compound processing according to the fifth embodiment.

[0035] FIG. 12 is a schematic cross sectional view of a core yarn according to the fifth embodiment.

[0036] FIG. 13 is a schematic side elevational view showing a coating treatment according to the fifth embodiment.

[0037] FIG. 14 is a block diagram showing a step of manufacturing a tough yarn according to a sixth embodiment.

[0038] FIG. 15 is a schematic side elevational view showing a compound processing according to the sixth embodiment.

[0039] FIG. 16 is a schematic cross sectional view of a core yarn according to the sixth embodiment.

[0040] FIG. 17 is a schematic side elevational view showing a coating treatment according to the sixth embodiment.

[0041] FIG. 18 is a block diagram showing a step of manufacturing a tough yarn according to a seventh embodiment.

[0042] FIG. 19 is a block diagram showing a step of manufacturing a tough yarn according to an eighth embodiment.

[0043] FIG. 20 is a block diagram showing a step of manufacturing a tough yarn according to a ninth embodiment.

[0044] FIG. 21 is an explanatory view showing an example of a knitted fabric.

[0045] FIG. 22 is an explanatory view showing an example of a woven fabric.

DESCRIPTION OF EMBODIMENT

[0046] A description will be given below of embodiments according to the invention with reference to the accompanying drawings. In the drawings, reference numeral 1 denotes a hard fiber, reference numeral 2 denotes a molten fiber, reference numeral 3 denotes a lower layer fiber which is arranged between the hard fiber 1 and the molten fiber 2, reference symbols 10a denote a composite yarn in which the hard fiber 1 and the molten fiber 2 are compounded (twisted or covered), reference symbols 10c to 10f denote a composite yarn in which the hard fiber 1, the lower layer fiber 3 and the molten fiber 2 are compounded, reference symbols 20a and 20b denote a core yarn in which the molten fiber 2 which is molten 2b according to a heating treatment 12 is deposited to the hard fiber 1 and integrated, reference symbols 20c to 20e denote a core yarn in which the molten fiber 2 which is molten 2b is deposited to the hard fiber 1 and the lower layer fiber 3 which is not molten and is integrated, reference symbol 30a denotes a tough yarn which is obtained by winding a winding yarn 5 to the core yarns 20a and 20b, reference symbols 30c to 30e denote a tough yarn which is obtained by winding the winding yarn 5 to the core yarns 20c to 20e, and reference symbol 40 denotes a tough yarn in which a winding yarn 5a is fusion bonded to the core yarns 20c to 20e by the molten fiber 2 which is molten 2b.

[0047] FIGS. 1 to 4 are views showing first and second embodiments which are not provided with any lower layer fiber. FIGS. 5 to 20 are views showing third to ninth embodiments which include the lower layer fiber 3, in which FIGS. 5 to 9 are views showing third and fourth embodiments in which one hard fiber 1 and one lower layer fiber 3 are provided. FIGS. 10 to 13 are views showing a fifth embodiment in which two hard fibers 1m and 1n are provided. FIGS. 14 to 17 are views showing a sixth embodiment in which two lower layer fibers 3m and 3n are provided. FIGS. 18 to 20 are views showing seventh to ninth embodiments in which a heating treatment 12 and a coating treatment 13 in the third to sixth embodiments are reversed in the step order.

[0048] FIG. 1 is a block diagram showing a step of manufacturing a tough yarn 30a according to the inventions of the first and second embodiments. The hard fiber 1 and the molten fiber 2 are compounded in a compound processing 11 according to a first step, and a heating treatment 12 is applied to the obtained composite yarn 10 in a second step and at least peripheral portion of the molten fiber 2 is molten 2b and is attached to a surface of the compounded hard fiber 1. The yarn obtained by the heating treatment 12 is a core yarn 20a.

[0049] The heating treatment 12 according to the second step in FIG. 1 is a treatment for melting at least the peripheral portion of the molten fiber 2 compounded in the hard fiber 1 and fusion bonded to the surface of the hard fiber 1 so as to integrate both the elements. Therefore, a heating temperature and a heating time are a temperature and a time required for the melting resin in which at least the peripheral portion of the molten fiber 2 is molten 2b is fusion bonded to the surface of the hard fiber 1. In the case that the molten fiber 2 employs a molten fiber which has a high melting point in its center portion 2a and has a low melting point in its peripheral portion, the heating temperature in the heating treatment 12 is a temperature at which the resin of the low-melting-point portion is molten and the resin of the high-melting-point portion 2a is not molten.

[0050] FIGS. 2 and 3 are enlarged views schematically showing cross sections of the core yarns 20a and 20b according to the first and second embodiments obtained by the heating treatment, in which FIG. 2 shows an example of the core yarn in which one molten fiber 2 is wound to a multifilament glass fiber 1, and FIG. 3 shows an example of the core yarn in which a narrow molten fiber and a thick molten fiber are wound to a monofilament stainless fiber in reverse directions to each other.

[0051] In a coating treatment 13 according to the third step, the winding yarn 5 is wound to the core yarns 20a and 20b which are obtained in the second step. FIG. 4 is an enlarged side elevational view showing a state in the middle of the covering process in the coating treatment 13, and shows a state in which the winding yarn 5 forming the tough yarn is wound to the core yarn 20a forming the core yarn. FIG. 4 is a single cover, however, may be, of course, a double cover. The tough yarn 30a can be obtained by the third step.

[0052] FIGS. 5, 10 and 14 are block diagrams showing the steps of manufacturing the tough yarns 30c to 30e. In the compound processing 11 according to the first step, each of the hard fiber 1, the lower layer fiber 3 and the molten fiber 2 is compounded, and the heating treatment 12 is applied to the obtained composite yarns 10c to 10e in the second step and at least the peripheral portion of the molten fiber 2 is molten 2b so as to be attached to the compounded hard fiber 1 and lower layer fiber 3. The yarns obtained by the heating treatment 12 are the core yarns 20c to 20e. The compound processing 11 may be carried out by one step, however, is generally carried by a plurality of twisting or covering steps.

[0053] As shown in FIGS. 6, 11 and 15, the lower layer fiber 3 is wound as an additional yarn to the hard fiber 1. The lower layer fiber 3 is wound in such a manner that the hard fiber 1 is exposed in relation to the lower layer fiber which is adjacent without completely covering the surface of the hard fiber 1. The preferable winding number of the lower layer fiber 3 is between 40 turns/m and 1000 turns/m, and more preferably between 100 turns/m and 350 turns/m. However, in the sixth embodiment in which two lower layer fibers 3 are provided, and the two lower layer fibers 3m and 3n are compounded according to a double cover processing generally as shown in FIG. 15, the lower layer fiber 3m in the hard fiber 1 side in this case is preferably wound at 3 to 50 turns/m.

[0054] The molten fiber 2 is generally compounded according to the double cover processing in such a manner as to intersect the lower layer fiber (the additional yarn) which is wound to the hard fiber 1. More specifically, as shown in FIGS. 6, 11 and 15, the lower layer fiber 3 is wound as the additional yarn to the hard fiber 1, and the molten fiber 2 forming an upper winding yarn is wound in a reverse winding direction.

[0055] The compound processing in FIGS. 6 to 8 is a processing for the lower layer fiber 3 being wound to the hard fiber 1, may be set to a processing for the hard fiber 1 being wound to the lower layer fiber 3. FIG. 9 is a drawing showing a composite yarn 10f in the processing mentioned above. Since the stretch property is provided in the core yarn, the wooly ester, the ester, the nylon or the woolly nylon is set to the lower layer fiber 3 and the hard fiber 1 is wound to the lower layer fiber in the compound processing 11, and the molten fiber 2 is wound thereon and the heating treatment is applied, and the winding yarn is wound to the core yarn. They are suitable for the knitted and woven fabric in which the higher flexibility is required.

[0056] The heating treatment 12 according to the second step is a treatment for melting at least a peripheral portion of the molten fiber 2 in the composite yarn 10 obtained by the compound processing 11 of the first step, and fusion bonding to the hard fiber 1 and the lower layer fiber 3 corresponding to a lower layer, thereby integrating three elements. Therefore, the heating temperature and the heating time are a temperature and a time at which at least the peripheral portion of the molten fiber 2 is molten 2b and the molten resin is fusion bonded to the surfaces of the hard fiber 1 and the lower layer fiber 3.

[0057] FIGS. 7, 12 and 16 are enlarged views schematically showing cross sections of the core yarns 20c to 20e according to the respective embodiments obtained by the heating treatment 12. As shown in the drawings, the resin 2b molten on the surface of the hard fiber 1 is fusion bonded to the surfaces of the hard fiber 1 and the lower layer fiber 3 corresponding to the lower layer in a state of being expanded from the center portion 2a of the molten fiber which is not molten, and the high-melting-point portion 2a corresponding to the center portion of the molten fiber is left within the molten resin 2b in a state of being wound to the hard fiber 1 and the lower layer fiber 3 without being molten.

[0058] As mentioned above, the lower layer fiber 3 does not completely cover the surface of the hard fiber 1, but the hard fiber 1 is exposed between the wound lower layer fibers 3. The molten fiber 2 which is molten is fusion bonded to the surface of the hard fiber 1 in this exposed area. In the meantime, since the molten fiber 2 is compounded in such a manner as to intersect the lower layer fiber 3, the molten fiber 2 is fusion bonded to the lower layer fiber 3 in the intersecting portion.

[0059] In the coating treatment 13 according to the third step, the winding yarn 5 is wound to the core yarns 20c to 20e obtained in the second step.

[0060] FIGS. 8, 13 and 17 are enlarged side elevational views showing a state in the middle of the covering step in the coating treatment 13, and show a state in which the winding yarn 5 is wound to the core yarns 20c to 20e. These drawings show a single cover, however, may be, of course, a double cover. The tough yarns 30c to 30e can be obtained by the coating treatment.

[0061] In the case that the winding yarn 5 employs a yarn which has a heat resistance, that is, a winding yarn 5a which is not molten during the heating treatment 1 melting the molten fiber 2 and fusion bonding to the hard fiber 1 and the lower layer fiber 3, the coating treatment 13 can be carried out before the heating treatment 12 as shown in FIGS. 18 to 20.

[0062] The compound processing 11, the heating treatment 12 and the coating treatment 13 according to the seventh to ninth embodiments in FIGS. 18 to 20 are respectively the same as the compound processing 11, the heating treatment 12 and the coating treatment 13 according to the third to sixth embodiments. The obtained tough yarn 40 is different from the tough yarns 30c to 30e according to the third to sixth embodiments, only in a point that the winding yarn is limited to the yarn 5a having the heat resistance, and the molten fiber 2 molten by the heating treatment 12 is also fusion bonded to the winding yarn 5a.

[0063] In a test which the inventors made by using the glass fiber as the hard fiber 1, the wooly ester as the lower layer fiber 3, and the woolly nylon, the woolly ester or the aramid fiber as the winding yarn, the function and the effect of the tough yarn are approximately the same as those of the tough yarns according to the third to sixth embodiment, as long as the kinds of the hard fiber, the lower layer fiber, the molten fiber and the winding yarn and the winding number thereof are the same.

[0064] The obtained tough yarns 30 and 40 can be knitted and woven independently or together with the yarn including the other hard fiber, however, is generally interknitted or combined woven with the other yarn which does not include any hard fiber. For example, when knitting a glove, it is possible to plate (additional yarn knit, FIG. 21) so that the ground yarns 30 and 40 appear on a surface of the glove and the additional knitting yarn 8 appears on an inner surface, by using the tough yarns 30 and 40 according to the invention as the ground yarn, and using a yarn which is excellent in a stretch property, a moisture absorbing property and a texture property, such as a yarn including a high elastic yarn, for example, the polyurethane fiber, the crude rubber, a bulky processing yarn and a yarn of a natural fiber, as the additional knitting yarn 8.

[0065] The plating is widely used as a knitting method in which different yarns are used in front and back surfaces, however, the double cloth and the interlock stitch are also known. Thus, it is possible to obtain a knitted and woven fabric having a nature in correspondence to an intended use of the knitted and woven fabric, such as the flexibility, the moisture absorbing property and the texture property, on the inner surface or the back surface, while having the cutting resistance and the toughness on the outer surface or the surface, by utilizing these techniques.

[0066] For example, as shown in FIG. 22, there is a woven fabric having a double structure which is obtained by weaving the outer layer 21 with the tough yarns 30 and 40 according to the invention, weaving the inner layer 22 with the other yarn 9 which is constructed by a fiber which is excellent in a tough feeling, and intermittently winding 9a and connecting the other yarn 9 to the outer layer 21. The interlock stitch also forms the same two-layer knitted fabric as the double cloth.

TABLE-US-00001 TABLE 1 Hard fiber Molten fiber Twisting number Winding yarn Winding number 1 Glass yarn Polyester molten yarn 250 turns/m 55dtex (52 m) 20/(165 m) 2 Glass yarn Polyethylene molten yarn 250 turns/m 55dtex (52 m) 560dtex (223 m) 3 Glass yarn Polyester molten yarn 350 turns/m Polyethylene 200 turns/m 55dtex (52 m) 167dtex (124 m) 220dtex (173 m) 4 Glass yarn Polyester molten yarn 350 turns/m 55dtex (52 m) 55dtex (71.6 m) 5 Glass yarn Polyester molten yarn 350 turns/m 110dtex (74.5 m) 167dtex (124 m) 6 Glass yarn Polyester molten yarn 350 turns/m Polyethylene 200 turns/m 110dtex (74.5 m) 280dtex (161 m) 440dtex (346 m) 7 Stainless thin line Polyester molten yarn 250 turns/m 30 m 20/(165 m) 8 Stainless thin line Polyethylene molten yarn 250 turns/m 30 m 560dtex (223 m) 9 Stainless thin line Polyester molten yarn 350 turns/m Polyethylene 200 turns/m 30 m 167dtex (124 m) 220dtex (173 m) 10 Stainless thin line Polyester molten yam 350 turns/m Polyethylene 200 turns/m 30 m 55dtex (71.6 m) 220dtex (173 m) 11 Stainless thin line Polyester molten yarn 350 turns/m 80 m 280dtex (161 m)

[0067] Table 1 is a table showing examples of the tough yarns according to the first and second embodiments which the inventors of the present invention manufacture by way of trial. In this table, the glass yarns in the product numbers 1 to 4 are a glass fiber multifilament in which the raw wire number is 100, the glass yarns in the product numbers 5 and 6 are a glass fiber multifilament in which the raw wire number is 200, and a stainless thin line is a monofilament.

[0068] The molten fiber is a yarn constituted by a plurality of fibers each having a high melting point in its center portion and a low melting point in its peripheral portion, the product numbers 1 and 7 are the spun yarn, and the product numbers 2 to 6 and 8 to 11 are the multifilament. The molten fiber constituted by a plurality of spun yarns and the multifilament is formed into a monofilament shape constituted by a plurality of fibers 2a which are not molten and left, and the molten resin 2b integrally including them, according to the heating treatment 12 in FIG. 1, and the molten low-melting-point portion is fusion bonded to the surfaces of the glass yarn and the stainless thin line.

[0069] The winding yarn is a multifilament. Numerical value in parentheses of each of fields about the glass yarn, the molten fiber and the winding yarn corresponds to numerical value indicating a wire diameter on the assumption that a total cross sectional area of the fibers is one fiber.

[0070] According to the test made by the inventors, it is recognized that the tough yarns of the product numbers 3 and 6 and the product numbers 9 and 10 indicating the kind of the winding yarn in Table 1 are particularly excellent as the ground yarn which is used for knitting the cutting resistance glove according to the plating.

[0071] The core yarn using the stainless single yarn (monofilament) as the hard fiber 1 can not often coat the hard fiber 1 sufficiently due to generation of slip in a longitudinal direction of the yarn between the stainless and the molten resin. This problem can be solved by employing two molten fibers 2m and 2n as the molten fiber 2 and compounding them, as shown in FIG. 3.

TABLE-US-00002 TABLE 2 Molten fiber Twisting Twisting Twisting number number number Hard fiber 2m (T/M) 2n (T/M) Winding yarn (T/M) sus30 .Math. 35 .Math. 50 50D 350 50D 350 High-tension polyethylene 200D 300 GY38D 200 200 WE50D, 75D 200 100 300 WN30D, 50D, 70D 300 sus50 .Math. 60 .Math. 70 70D 350 50D 350 High-tension polyethylene 200D 300 GY50D, GY100D 200 200 WE50D, 75D 200 100 300 WN30D, 50D, 70D 300 50D 350 70D 350 High-tension polyethylene 200D 300 200 200 WE50D, 75D 200 100 300 WN30D, 50D, 70D 300 sus60 .Math. 70 .Math. 80 70D 350 70D 350 High-tension polyethylene 200D 300 GY100D 200 200 WE50D, 75D 200 100 300 WN30D, 50D, 70D 300 70D 350 70D 350 High-tension polyethylene 200D 300 200 200 WE50D, 75D 200 100 300 WN30D, 50D, 70D 300

[0072] Table 2 is a table showing the contents of the test which the inventors made about the core yarn 20b shown in FIG. 3. More specifically, the test is made by winding the molten fiber 2m to the hard fiber 1, thereafter winding the molten fiber 2n so as to intersect the molten fiber 2m forming the lower layer and compounding, and thereafter melting both the molten fibers 2m and 2n by applying the heating treatment 12. As a result of the test, it is confirmed that the problem mentioned above when using the monofilament stainless fiber can be solved.

[0073] The hard fiber, the molten fibers 2m and 2n and the winding yarn in Table 2 are described collectively in relation to a plurality of trial yarns having different twisting numbers, and the kinds of the fibers and the yarns described in plural lines in each of the fields indicate the manufacture by way of trial in relation to plural thickness sectioned by , in each of the fields.

[0074] In the table, GY denotes a multifilament of the glass fiber, sus denotes a stainless monofilament, molten fiber denotes a multifilament of a molten polyester, WE denotes wholly ester, WN denotes woolly nylon, PET denotes polyester, An denotes acryl, D denotes denier, denotes a wire diameter micron, and T/m denotes a twisting number per meter.

TABLE-US-00003 TABLE 3 Lower Twisting Twisting Twisting layer number Molten number number Hard fiber fiber (T/M) fiber (T/M) Winding yarn (T/M) GY38D WE30D 350 50D 350 High-tension polyethylene 200D 300 sus30 .Math. 35 200 200 WE50D, 75D 200 100 300 WN30D, 50D, 70D 300 GY50D WE50D 350 50D 350 High-tension polyethylene 200D 300 sus50 .Math. 60 200 200 WE75D, 150D 200 100 300 WN70D, 140D, 210D 300 GY100D WE50D 350 50D 350 High-tension polyethylene 200D 300 sus50 .Math. 60 200 200 WE150D, 300D 200 sus70 .Math. 80 100 300 WN140D, 210D 300 WE75D 350 70D 350 High-tension polyethylene 200D 300 200 200 WE150D, 300D 200 100 300 WN140D, 210D 300 WE50D 350 50D 350 High-tension polyethylene 400D 300 200 200 WE300D, 450D 200 100 300 WN210D, 420D 300 WE75D 350 70D 350 High-tension polyethylene 400D 300 200 200 WE300dD450D 200 100 300 WN210D, 420D 300 GY200D WE50D 350 50D 350 High-tension polyethylene 200D 300 sus50 .Math. 60 200 200 WE150D, 300D 200 sus70 .Math. 80 100 300 WN140D, 210D 300 WE75D 350 70D 350 High-tension polyethylene 200D 300 200 200 WE150D, 300D 200 100 300 WN140D, 210D 300 WE50D 350 50D 350 High-tension polyethylene 400D 300 200 200 WE300D, 450D 200 100 300 WN210D, 420D 300 WE75D 350 70D 350 High-tension polyethylene 400D 300 200 200 WE300D, 450D 200 100 300 WN210D, 420D 300

TABLE-US-00004 TABLE 4 Twisting Twisting Twisting Twisting Hard fiber Hard fiber number Lower layer number Molten number number 1m 1n (T/M) fiber 3 (T/M) fiber 2 (T/M) Winding yam (T/M) GY38D sus30 3 to 50 WE30D 350 50D 350 High-tension 350 polyethylene 200D GY50D sus30 3 to 50 WE30D 350 50D 350 High-tension 350 polyethylene 200D GY100D sus30 3 to 50 WE50D 350 50D 350 High-tension 350 polyethylene 400D GY200D sus30 3 to 50 WE50D 350 500 350 High-tension 350 polyethylene 400D GY200D sus30 3 to 50 WE75D 350 50D 350 High-tension 350 polyethylene 400D GY100D sus40 3 to 50 WE50D 350 50D 350 Aramid fiber 400D 350 GY200D sus50 3 to 50 WE75D 350 50D 350 Aramid fiber 400D 350

TABLE-US-00005 TABLE 5 Twisting Lower Twisting Twisting Twisting Lower layer number layer fiber number Molten number number Hard fiber 1 fiber 3m (T/M) 3n (T/M) fiber 2 (T/M) Winding yarn (T/M) sus40 WE75D 3 to 50 WE75D 350 50D 350 High-tension 350 polyethylene 400D sus40 PET spun yarn 3 to 50 WE75D 350 50D 350 High-tension 350 20/ polyethylene 400D sus40 An spun yarn 3 to 50 WE75D 350 50D 350 High-tension 350 /48 polyethylene 400D sus50 WE75D 3 to 50 WE75D 350 50D 350 High-tension 350 polyethylene 400D sus50 PET spun yarn 3 to 50 WE75D 350 50D 350 High-tension 350 20/ polyethylene 400D sus50 An spun yarn 3 to 50 WE75D 350 50D 350 High-tension 350 /48 polyethylene 400D

[0075] Tables 3, 4 and 5 are the tables respectively showing the examples of the tough yarns according to the third, fourth and sixth embodiments which the inventors of the present invention manufacture by way of trial. The hard fiber, the lower layer fiber, the molten fiber and the winding yarn in Table 3 are described collectively about a plurality of trial yarns having different twisting numbers, and the kinds of the fibers and the yarns described in plural lines in each of the fields indicate the manufacture by way of trial in relation to plural kinds sectioned by , in each of the fields.

[0076] The molten fiber is molten at least in a peripheral edge portion of each of the fibers according to the heating treatment 12, and is fusion bonded to the surfaces of the hard fiber and the woolly ester fiber in the lower layer, and a plurality fibers are solidified after being molten and are formed into a monofilament shape constituted by the molten resin 2b (refer to FIGS. 7, 12 and 16).

[0077] In Table 3, the test is made in the case that the glass fiber multifilament is used as the hard fiber 1, and the case that the stainless monofilament is used as the hard fiber 1. In both cases, it is possible to apply an excellent flexibility and a good wearing feeling to the obtained tough yarn and knitted and woven fabric by arranging the lower layer fiber 3 between the hard fiber 1 and the molten fiber 2.

[0078] However, the core yarn using one stainless monofilament as the hard fiber can not often coat the hard fiber 1 sufficiently due to the weak fusion bonding force between the hard fiber and the molten fiber, and the flexibility of the knitted and woven fabric using the core yarn is not sufficient.

[0079] On the contrary, according to the fifth embodiment in which the hard fiber 1 is constructed by a twisted yarn of the glass fiber 1m and the stainless fiber 1n as shown in Table 4 and FIG. 11, and according to the sixth embodiment in which the lower layer fiber 3 is constructed by two lower layer fibers 3m and 3n having reverse winding directions as shown in Table 5 and FIG. 15, it is possible to enhance the flexibility of the core yarn or the tough yarn including the stainless monofilament which is excellent in the cutting resistance.

[0080] Practically, the embodiment shown in Table 4 is preferable in the case of attaching importance to the cutting resistance, and the flexibility can be also applied by employing the structure in which the stainless fiber 1n is wound to the multifilament 1m of the glass fiber. In the meantime, in the case of attaching importance to the flexibility, the embodiment shown in Table 5 can be employed.

REFERENCE SIGNS LIST

[0081] 1 hard fiber [0082] 2 molten fiber [0083] 3 lower layer fiber [0084] 5, 5a winding yarn [0085] 9, 9 elastic yarn [0086] 10 (10a, 10c-10f) composite yarn [0087] 11 compound processing [0088] 12 heating treatment [0089] 13 coating treatment [0090] 20 (20a-20e) core yarn [0091] 30 (30a, 30c-30e) tough yarn [0092] 40 (40c-40e) tough yarn