Circular knitting

Abstract

Provided is a circular knitted fabric that has a high rupture strength even though cellulose is mixed therein, a high cellulose mix rate, and a small weight per area (lightweight and thin), and that can be manufactured by using an all-purpose circular knitting machine. A circular knitted fabric according to the present invention includes cellulose fiber and synthetic fiber, is characterized by including rows A in each of which knit loops of the synthetic fiber are linked consecutively in the wale direction of the knitted fabric, and rows B in each of which knit loops of the cellulose fiber and knit loops of the synthetic fiber are linked alternately, or by including rows A in each of which knit loops of the synthetic fiber are linked consecutively in the wale direction of the knitted fabric, and rows B in each of which knit loops of the cellulose fiber and knit loops of the synthetic fiber are linked in the wale direction of the knitted fabric at a ratio of 1 to 5 : 1 to 9, and is characterized in that the rows A and the rows B are arranged at a ratio of either one of 1:4, 1:3, 1:2, 1:1, 2:2, 3:3, 4:4, 2:1, 3:1, 4:1, 2:3, 2:4, 3:2, 3:4, 4:3, or 4:2, and the contained amount of the cellulose fiber in the knitted fabric is 10-70 mass%.

Description

[Technical Field]

[0001] The present invention relates to circular knitted fabrics. [Background technology]

[0002] Circular knit fabrics have long been known as apparel knits. For example, plain jersey, bare jersey, and pique weaves are thin, lightweight, and breathable, making them popular for a wide range of applications, from innerwear to outerwear such as T-shirts and polo shirts. Among these, fabrics with a high cellulose content have a limited burst strength the thinner they are, so fabrics with a high or 100% synthetic content have become mainstream. Typical burst strength values ​​for apparel are 350 kPa or higher for thin knitted innerwear and 400 kPa or higher for thick knitted T-shirts and polo shirts. It has been difficult to achieve burst strength equivalent to that of thick knitted fabrics, particularly for fabrics with a high cellulose content. Therefore, to date, lightweight clothing has typically been characterized by the use of synthetic fibers such as polyester and nylon to maintain burst strength, and increasing the cellulose content has been avoided.

[0003] The following Patent Document 1 describes a weft knitted fabric consisting of a lattice pattern repeating unit, and the weight is 30 to 90 g / m 2 It is described that a lightweight, thin knit fabric characterized by having a burst strength of 300 kPa or more has improved lightness and strength, but there is room for improvement in improving the lightness, thinness, and strength of cellulose-containing fabrics.

[0004] Patent Document 2 below discloses a single circular knit fabric containing a water-absorbent stretchable yarn (cellulose fiber) and an elastic yarn, which is comfortable to wear, has improved breathability when sweating, and does not feel sticky or stuffy. The circular knit fabric is characterized by having a portion where a course containing an elastic yarn is knitted adjacent to a course containing the water-absorbent stretchable yarn. This improved breathability when sweating is based on the discovery that if a course containing an elastic yarn is knitted adjacent to a course containing the water-absorbent stretchable yarn, it can support the opening of loops when the water-absorbent stretchable yarn stretches due to water absorption, thereby maximizing the breathability improvement performance due to water absorption stretching, and is not related to improved strength. The water-absorbent stretchable yarn described in Patent Document 2 is a cellulose fiber that has been treated with a specific alkali or the like and has a water absorption elongation rate of 3% or more. Furthermore, such a specific knitting structure is a knitting structure in which cellulose fibers and synthetic fibers plated with elastic yarns are alternately knitted, or a knitting structure in which knitted portions in which tuck loops or welted loops are continuous in the wale direction in the knitted portions of the cellulose fibers and jersey knit are alternately repeated, and is not a knitting structure in which the knit stitches of the courses made of synthetic fibers are connected by knitted loops and the knitted loops of the synthetic fibers are continuously connected in the wale direction of the knitted fabric. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Special Publication No. 2017-516925 [Patent Document 2] Japanese Patent Application Laid-Open No. 2009-35846 Summary of the Invention [Problem to be solved by the invention]

[0006] In view of the above-mentioned state of the art, the problem that the present invention aims to solve is to provide a circular knitted fabric that contains cellulose but has high burst strength, a high cellulose content, a small basis weight (lightweight and thin), and can be manufactured using a highly versatile circular knitting machine. [Means for solving the problem]

[0007] In order to solve the above problems, the inventors conducted extensive research and experiments, and as a result, unexpectedly discovered that the above problems could be solved by a knitted fabric with a specific weave and design, which led to the completion of the present invention. That is, the present invention is as follows. [1] A circular knitted fabric containing cellulose fibers and synthetic fibers, comprising: a row A in which the knitted loops of the synthetic fibers are connected continuously in the wale direction of the knitted fabric; and a row B in which the knitted loops of the cellulose fibers and the knitted loops of the synthetic fibers are connected alternately, wherein the row A and the row B are arranged in a ratio of 1:4, 1:3, 1:2, 1:1, 2:2, 3:3, 4:4, 2:1, 3:1, 4:1, 2:3, 2:4, 3:2, 3:4, 4:3, or 4:2, and the cellulose fiber content of the knitted fabric is 10% by mass or more and 70% by mass or less. [2] The circular knitted fabric according to [1], wherein the courses made of the cellulose fibers and the courses made of the synthetic fibers are knitted alternately and repeatedly in the wale direction. [3] A circular knitted fabric according to [1] or [2], wherein the courses made of cellulose fibers alternate between knit stitches and welt stitches or tuck stitches, and the courses made of synthetic fibers are continuously knit. [4] A circular knitted fabric containing cellulose fiber and synthetic fiber, comprising: row A in which the knitted loops of the synthetic fiber are continuously connected in the wale direction of the knitted fabric; and row B in which the knitted loops of the cellulose fiber and the knitted loops of the synthetic fiber are connected in the wale direction of the knitted fabric at a ratio of 1 to 5:1 to 9 (excluding 1:1), wherein row A and row B are arranged in any of the following ratios: 1:4, 1:3, 1:2, 1:1, 2:2, 3:3, 4:4, 2:1, 3:1, 4:1, 2:3, 2:4, 3:2, 3:4, 4:3, or 4:2; and the cellulose fiber content of the knitted fabric is 10% by mass or more and 70% by mass or less. [5] The circular knit fabric according to [4], wherein the courses made of cellulose fibers alternate between knit stitches and welt stitches or tuck stitches, and the courses made of synthetic fibers are either continuously knit or alternate between knit stitches and welt stitches or tuck stitches. [6] The circular knitted fabric according to any one of [1] to [5], wherein the row A and the row B are arranged in a ratio of 1:1. [7] The circular knitted fabric according to any one of [1] to [6], wherein the number of loops in the wale direction in row A is 10 or more and 70 or less loops per inch. [8] When the elastic fibers are removed, the basis weight is 30 g / m 2 More than 160g / m 2 The circular knitted fabric according to any one of the above [1] to [7], which is as follows: [9] The circular knitted fabric according to any one of [1] to [8], wherein the cellulose fibers have a fineness of 33 dtex or more and 167 dtex or less, and the synthetic fibers have a fineness of 33 dtex or more and 110 dtex or less.

[10] The circular knitted fabric according to any one of [1] to [9], wherein the yarn length of the synthetic fiber is 130 mm / 100W or more and 270 mm / 100W or less, and the yarn length of the cellulose fiber is 0.8 times or more and 1.5 times or less the yarn length of the synthetic fiber.

[11] The circular knit fabric according to any one of [1] to

[10] , wherein the cellulose fibers are rayon, cupra, cotton, lyocell or acetate, and the synthetic fibers are nylon or polyester.

[12] The circular knitted fabric according to any one of [1] to

[11] above, wherein elastic fibers are mixed with the cellulose fibers and / or the synthetic fibers by paralleling or plating.

[13] The circular knitted fabric according to any one of [1] to

[12] , wherein the elastic fiber is mixed with the cellulose fiber and the synthetic fiber by paralleling or plating, and the elastic fiber is mixed in all courses by paralleling or plating.

[14] The circular knitted fabric according to any one of [1] to

[13] , which is a single circular knitted fabric. [Effects of the Invention]

[0008] The circular knit fabric of the present invention is a circular knit fabric that has high burst strength despite containing cellulose, a high cellulose content, a small basis weight (lightweight and thin), and can be produced using a highly versatile circular knitting machine. The knit fabric of the present invention is a cellulose blend, but by using a structure and design in which the knitted loops of synthetic fibers are continuously connected in the wale direction of the knit fabric, it is possible to design it to have high burst strength and a small basis weight (lightweight and thin). Furthermore, it is a circular knit fabric that can be produced using only two types of needles, short needles and long needles, which are highly versatile circular knitting equipment. The knit fabric of the present invention can also be made into a plain fabric with no pattern tendencies and excellent versatility. The gauge of the circular knitting machine that can be used is preferably 28 gauge to 60 gauge, more preferably 28 gauge to 40 gauge. Furthermore, the inch size of the circular knitting machine that can be used is 14 inches to 24 inches for small sizes and 26 inches to 60 inches for large sizes, and the knitting design allows for knitting not only with the general semi-jacquard knitting but also with jacquard knitting and molded knitting. Furthermore, by using a specific knitting structure, the knitted fabric of the present invention can be designed to have a pattern that is free from quirks and appears as a plain smooth or ribbed stitch on the front side, making it suitable for clothing applications. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2 is a schematic diagram showing an example of a knitting structure of the present embodiment. [Figure 2] FIG. 2 is a schematic diagram showing an example of a knitting structure of the present embodiment. [Figure 3] FIG. 2 is a schematic diagram showing an example of a knitting structure of the present embodiment. [Figure 4] FIG. 1 is a schematic diagram showing an example of the knitting structure of Comparative Examples 1 to 4 and 7. [Figure 5] FIG. 10 is a schematic diagram showing an example of the knitting structure of Comparative Examples 8 to 10. [Figure 6] FIG. 10 is a schematic diagram showing an example of a knitting structure of Comparative Example 5. [Figure 7] FIG. 10 is a schematic diagram showing an example of a knitting structure of Comparative Example 6. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described in detail. One embodiment of the present invention is a circular knit fabric containing cellulose fibers and synthetic fibers, comprising a row A in which the knitted loops of the synthetic fibers are connected continuously in the wale direction of the fabric, and a row B in which the knitted loops of the cellulose fibers and the knitted loops of the synthetic fibers are connected alternately, the rows A and B being arranged in a ratio of 1:4, 1:3, 1:2, 1:1, 2:2, 3:3, 4:4, 2:1, 3:1, 4:1, 2:3, 2:4, 3:2, 3:4, 4:3, or 4:2, and the cellulose fiber content of the knitted fabric is 10% by mass to 70% by mass. This knitting structure allows for a design with a smooth or ribbed stitch appearance on the front side, without any pattern tendencies, making it suitable for clothing applications.

[0011] By having row A in which the knitted loops of synthetic fibers are continuously connected in the wale direction of the knitted fabric, the fabric has excellent burst strength even when the blend ratio of cellulose fibers is high or the fabric has a low basis weight. Row A is not limited to this, but for example, the courses made of synthetic fibers can be knitted stitches and the courses made of cellulose fibers can be welt stitches or tuck stitches. In this case, because the courses made of cellulose fibers are welt stitches or tuck stitches, the knitted loops in the courses made of synthetic fibers are connected by knitted loops, and the knitted loops of synthetic fibers in row A are continuously connected in the wale direction of the knitted fabric. For example, as shown in Figure 1, by making the courses made of synthetic fibers in the odd-numbered courses (1, 3, 5, 7, etc.) of row A knitted stitches and the courses made of cellulose fibers in the even-numbered courses (2, 4, 6, 8, etc.) of row A welt stitches or tuck stitches, the knitted loops of synthetic fibers in the odd-numbered courses are connected by knitted loops, and row A is created in which the knitted loops of synthetic fibers in the odd-numbered courses are connected by knitted loops, and the knitted loops of synthetic fibers are continuously connected in the wale direction of the knitted fabric. Row A has a knitting structure in which knit stitches made of synthetic fibers and tuck or welt stitches made of cellulose fibers alternate in the wale direction, for example. Row B, in which knitted loops of cellulose fibers and knitted loops of synthetic fibers are alternately connected, may have, for example, a structure in which knit stitches are continuous, although this is not limited thereto. The ratio of rows A and B in the course direction of the knitted fabric is preferably A:B=1-4:1-4, more preferably A:B=1-3:1-3, even more preferably A:B=1-2:1-2, and it is particularly preferable that they are arranged at A:B=1:1. When row A is within a ratio of 1 to 4 in the course direction of the knitted fabric, the even-numbered courses (2, 4, 6, 8, etc.) of row A made of cellulose fibers have reduced yarn slack due to the knitting structure, making them less likely to snag. Also, when row B is within a ratio of 1 to 4 in the course direction of the knitted fabric, the number of connections between the synthetic fiber loops and the cellulose fiber loops is reduced, resulting in a stronger burst strength than plain weave (Figure 4). In the row A, the number of loops in the wale direction is preferably 10 to 70 loops per inch (2.54 cm), more preferably 10 to 40 loops per inch (2.54 cm).

[0012] It is preferable that courses made of cellulose fibers and courses made of synthetic fibers are knitted alternately in the wale direction. In this case, it is preferable that the courses made of cellulose fibers have alternate knit stitches and welt or tuck stitches, and the courses made of synthetic fibers have continuous knit stitches. This knitting structure has a row A in which knitted loops of synthetic fibers are continuously connected in the wale direction of the knitted fabric, and a row B in which synthetic fibers and cellulose fibers are alternately connected, thereby providing excellent burst strength even with a high cellulose content. Furthermore, the cellulose fiber content is preferably 10% by mass or more, more preferably 30% by mass or more, even more preferably 40% by mass or more, and particularly preferably 50% by mass. Examples of knitting structures of the present invention are shown in Figures 1-1 to 1-4 and 2-3.

[0013] Another embodiment of the present invention is a circular knitted fabric comprising cellulose fibers and synthetic fibers, and preferably includes a row A in which the knitted loops of the synthetic fibers are connected continuously in the wale direction of the fabric, and a row B in which the knitted loops of the cellulose fibers and the knitted loops of the synthetic fibers are connected in the wale direction of the fabric at a ratio of 1 to 5:1 to 9 (excluding 1:1), more preferably includes a row B in which the knitted loops of the cellulose fibers and the knitted loops of the synthetic fibers are connected at a ratio of 1 to 5:1 to 5 (excluding 1:1), even more preferably includes a row B in which the knitted loops are connected at a ratio of 1 to 3:1 to 3 (excluding 1:1), particularly preferably includes a row B in which the knitted loops are connected at a ratio of 1:1 to 3 (excluding 1:1), and even more particularly preferably includes a row B in which the knitted loops are connected at a ratio of 1:3. The circular knitted fabric has rows A and B arranged in any ratio of 1:4, 1:3, 1:2, 1:1, 2:2, 3:3, 4:4, 2:1, 3:1, 4:1, 2:3, 2:4, 3:2, 3:4, 4:3, or 4:2, and the cellulose fiber content in the knitted fabric is 10% by mass or more and 70% by mass or less. The fabric may be knitted with courses made of cellulose fibers and courses made of synthetic fibers repeated in a ratio of 1 to 5:1 to 9 (excluding 1:1) in the wale direction. In this case, it is preferable that the courses made of cellulose fibers alternate between knit stitches and welt stitches or tuck stitches, and that the courses made of synthetic fibers alternate between continuous knit stitches or between knit stitches and welt stitches or tuck stitches. This knitting structure provides row A, in which the knitted loops of synthetic fibers are connected continuously in the wale direction of the knitted fabric, and row B, in which the cellulose fibers and synthetic fibers are connected in a ratio of 1-5:1-9 (excluding 1:1), allowing for a lightweight fabric with a high cellulose fiber content and high burst strength. Six or more courses of cellulose fiber can cause yarn breakage during knitting, while ten or more courses of synthetic fiber cannot achieve a high cellulose content. Furthermore, the cellulose fiber content is preferably 10% by mass or more, more preferably 30% by mass or more, and even more preferably 40% by mass or more. Examples of knitting structures of the invention are shown in Figures 1-5 to 1-9. Note that the structure diagrams are not limited to these.

[0014] The weight of the circular knitted fabric of this embodiment is 30 g / m when the elastic fiber is removed. 2 More than 160g / m2 It is preferable that the content is not more than 50 g / m 2 More than 140g / m 2 More preferably, it is 70 g / m or less. 2 More than 100g / m 2 The thickness of the circular knitted fabric of this embodiment is preferably 0.2 mm or more and 0.7 mm or less. The burst strength of the circular knitted fabric of this embodiment is preferably 260 kPa or more and 600 kPa or less, more preferably 300 kPa or more and 550 kPa or less, and even more preferably 370 kPa or more and 550 kPa or less. The strength and lightness index of the circular knitted fabric of this embodiment is 0.05 g / m 2 ·kPa or more 0.58g / m 2 kPa or less, and more preferably 0.05 g / m 2 ·kPa or more 0.43g / m 2 kPa or less, and more preferably 0.05 g / m 2 ·kPa or more 0.27g / m 2 ·kPa or less.

[0015] The raw materials for the synthetic fiber course are not particularly limited, but examples include polyester fibers such as polyethylene terephthalate and polytrimethylene terephthalate, polyamide fibers such as nylon 6 and nylon 66, and polyolefin fibers such as polyethylene. These can be selected as bright yarns, semi-dull yarns, full-dull yarns, etc., and the cross-sectional shape of the fibers can be any cross-sectional shape such as round, oval, W-shaped, cocoon-shaped, hollow yarn, etc. The shape of the fibers is also not particularly limited, and they can be raw yarns or crimped yarns such as false twisted yarns.

[0016] The cellulose fiber course is not particularly limited, but regenerated (refined) cellulose fibers such as rayon, cupra, and lyocell may be used, and natural fibers such as cotton and hemp may also be used. The cellulose fibers may be in the form of a single yarn such as raw silk or twisted yarn, or may be in the form of a composite yarn with synthetic fibers as exemplified below. The form of the composite yarn is not particularly limited, and a composite method such as interlacing or co-firing may be selected according to the intended use. The fineness of the composite yarn of cellulose fibers and synthetic fibers is preferably 19 to 89 dtex, which allows for the production of a knitted fabric that is excellent in bending flexibility and is thin, lightweight, and comfortable to wear.

[0017] The fineness of the synthetic fibers, whether long or short, is preferably 33 dtex or more and 167 dtex or less, more preferably 56 dtex or more and 110 dtex or less, and even more preferably 56 dtex or more and 84 dtex or less. There are no particular restrictions on the fineness of the synthetic fibers, as long as the blend ratio of cellulose fibers in the fabric is in the range of 10% by mass or more and 70% by mass or less, preferably 30% by mass or more and 70% by mass or less. The fineness of the cellulose fibers, whether long or short, is preferably 33 dtex or more and 167 dtex or less, more preferably 56 dtex or more and 110 dtex or less, and even more preferably 56 dtex or more and 84 dtex or less. The cotton count of the spun yarn is preferably 120 / 1 or more and 30 / 1 or less, more preferably 100 / 1 or more and 60 / 1 or less, and even more preferably 100 / 1 or more and 80 / 1 or less. When the cellulose fibers and synthetic fibers are long fibers, there are no particular restrictions on the single fiber fineness, but it is preferable that both are in the range of 0.1 to 11.0 dtex and the number of single fibers is in the range of 10 to 200.

[0018] The cellulose fiber course and the synthetic fiber course may both be blended yarns of staple spun yarns of cellulose or natural fibers and synthetic fibers. The twisting may be single yarn, two-ply yarn, or three-ply yarn, and there are no particular limitations on the spinning method. The twist number for ring spinning, sirospun spinning, etc. is generally in the range of 15 to 25 twists per inch (2.54 cm), and may be a soft twist of 15 or less, or a hard twist of 25 or more. Open-end spinning, which is a bundle spinning, or MVS yarn may also be used.

[0019] The yarn length of the synthetic fiber is preferably 130 mm / 100W or more and 270 mm / 100W or less, more preferably 150 mm / 100W or more and 270 mm / 100W or less, and even more preferably 150 mm / 100W or more and 190 mm / 100W or less. The yarn length of the cellulose fiber is preferably 0.8 to 1.5 times the yarn length of the synthetic fiber, more preferably 1.0 to 1.5 times, and even more preferably 1.0 to 1.4 times. By setting the yarn length of the cellulose fiber to 0.8 to 1.5 times the yarn length of the synthetic fiber, when stress is applied to the weft-knitted fabric, the stress is applied to row A, which is made of high-strength synthetic fibers, thereby increasing the burst strength of the weft-knitted fabric. With the same yarn length, the burst strength does not decrease even when the fabric is finished and set to the lightest possible basis weight.

[0020] In the circular knit fabric of this embodiment, the elastic fiber may be mixed with cellulose fiber by paralleling or plating, or may be mixed with synthetic fiber by paralleling or plating, or may be mixed with cellulose fiber and synthetic fiber by paralleling or plating. The elastic fiber may be knitted into, for example, a course made of cellulose fiber, a course made of synthetic fiber, or a course made of cellulose fiber and a course made of synthetic fiber. It is particularly preferable for the elastic fiber to be knitted into all courses, including the courses made of cellulose fiber and the courses made of synthetic fiber. This is because knitting the elastic fiber into all courses provides a superior elongation modulus even at high elongation rates and reduces the occurrence of the phenomenon of the fabric not returning to its original shape, which is common with stretchable materials. Elastic fiber refers to a fiber with a maximum elongation of 100% or more. The polymer and spinning method of the elastic fiber are not particularly limited, and polyurethane-based (spandex) and polyetherester-based elastic fibers can be used. For example, polyurethane-based elastic fibers can be dry-spun or melt-spun. It is preferable that the elastic fiber does not lose its stretchability at around 180°C, which is the normal processing temperature for the presetting step during dyeing. Furthermore, it is also possible to use elastic fibers that contain special polymers or inorganic powders, etc., and thus have high setting properties, deodorizing properties, and antibacterial properties. The fineness of the elastic fiber is preferably 11 dtex or more and 44 dtex or less, and more preferably 11 dtex to 33 dtex from the viewpoint of light weight. The circular knitted fabric of this embodiment can be a single circular knitted fabric. [Example]

[0021] The present invention will be described in more detail below with reference to examples, although it should be understood that the present invention is not limited to these examples.

[0022] (1) Weight (g / m 2 ) It was measured in accordance with the mass per unit area method A under standard conditions of JIS-L-1096. Measurements are sometimes taken without the elastic fibers and sometimes taken with the elastic fibers included, but the basis weights obtained in the examples are values ​​measured without the elastic fibers.

[0023] (2) Bursting strength (kpa) Measurement was carried out in accordance with JIS-L-1096 (Mullen method) Method A. The burst strength values ​​obtained in the examples are values ​​measured after removing the elastic fibers.

[0024] (3) Strength and Lightweight Index (g / m 2 / kpa) = basis weight (g / m 2 ) / bursting strength (kpa).

[0025] (4) Thickness (mm) Measurements were made in accordance with JIS-L-1018 (knit fabric testing method). The thickness measurements in the examples were taken without the elastic fibers.

[0026] (5) Fineness measurement (dtex) Measurement was carried out in accordance with JIS-L-1013 (convenient method) B method.

[0027] (6) Elongation modulus Elongation rate: Measured according to JIS-L-1096 B method. Elongation modulus: Measured in accordance with JIS-L-1096 B-1 method (constant load method).

[0028] [Example 1] The knit and welt structures were alternately repeated needle by needle, with cupra 56 dtex / 45 filament yarn used in one course, and polyester 84 dtex / 72 filament yarn used in one all-needle knit course. The knitting was performed on a 32G single circular knitting machine with two needles per cycle. The test cloth was disperse dyed at 130°C for 30 minutes using a Mini Color Lab testing machine, to obtain a weft knitted fabric. The resulting knit structure is shown schematically in Figure 1-1. The characteristics of the resulting single knitted fabric are shown in Table 1 below.

[0029] [Comparative Example 1] The basic jersey knit structure was adopted, and the same yarn arrangement was used as in Example 1, using cupra 56 dtex / 45 filament yarn in one course and polyester 84 dtex / 72 filament yarn in another course, with the same yarn count. The yarn length conditions were shortened to the limit just before knitting became impossible, resulting in a knitted fabric (tightly knitted jersey) with the highest burst strength among jersey knits. The resulting knit structure is shown in Figure 4.

[0030] [Examples 2 to 12] A circular knitted fabric was obtained in the same manner as in Example 1, except that the yarn length was set to the value shown in Table 1 below. The characteristics of the obtained single knit circular knitted fabric are shown in Table 1 below.

[0031] [Table 1]

[0032] [Example 13] The knit and welt structures were alternately repeated needle by needle, with cupra 84 dtex / 45 filament yarn used in one course, and polyester 84 dtex / 72 filament yarn used in one all-needle knit course. The knitting was performed on a 28G single circular knitting machine with two needles per cycle. The test cloth was disperse dyed at 130°C for 30 minutes using a Mini Color Lab testing machine, to obtain a weft knitted fabric. The resulting knit structure is shown schematically in Figure 1-1. The characteristics of the resulting single circular knitted fabric are shown in Table 2 below.

[0033] Comparative Example 2 The basic jersey knit structure was adopted, and the same yarn arrangement was used as in Example 13, using cupra 84 dtex / 45 filament yarn in one course and polyester 84 dtex / 72 filament yarn in another course, with the same yarn count. The yarn length conditions were shortened to the limit just before knitting became impossible, resulting in a knitted fabric (tightly knitted jersey) with the highest burst strength among jersey knits. The resulting knit structure is shown in Figure 4.

[0034] [Examples 14 to 17] A single circular knitted fabric was obtained in the same manner as in Example 13, except that the yarn length was set to the value shown in Table 2 below. The characteristics of the single circular knitted fabric are shown in Table 2 below.

[0035] [Table 2]

[0036] Comparative Example 3 The basic jersey knit structure was adopted, and the same yarn arrangement was used as in Example 13, using cupra 84 dtex / 45 filament yarn in one course and polyester 84 dtex / 72 filament yarn in another course, with the same yarn count. The yarn length conditions were shortened to the limit just before knitting became impossible, resulting in a knitted fabric (tightly knitted jersey) with the highest burst strength among jersey knits. The resulting knit structure is shown in Figure 4.

[0037] [Examples 18 to 20] A single circular knitted fabric was obtained in the same manner as in Example 13, except that the yarn length was set to the value shown in Table 3-1. The characteristics of the single circular knitted fabric are shown in Table 3-1 below. The test cloth was disperse dyed in a Mini Color Lab tester at 130°C for 30 minutes to obtain a single knit fabric.

[0038] [Example 21] The knitting was carried out on a 28G single circular knitting machine using a two-needle cycle with cupra 84 dtex / 45 filament yarn in one course, where knit and tuck structures alternate needle by needle, and polyester 84 dtex / 72 filament yarn in one course of all-needle knit structure. The test fabric was disperse dyed at 130°C for 30 minutes on a Mini Color Lab testing machine to obtain a weft knitted fabric. The resulting knitted structure is shown schematically in Figure 1-2. The characteristics of the resulting single circular knitted fabric are shown in Table 3-1 below.

[0039] [Example 22] A 28G single circular knitting machine was used to knit a four-needle knit fabric, with one course consisting of alternating knit structure 1 and tuck structure 3, using cupra 84 dtex / 45 filament yarn, and one course of an all-needle knit structure using polyester 84 dtex / 72 filament yarn. The fabric was disperse dyed at 130°C for 30 minutes on a Mini Color Lab testing machine to obtain a weft knitted fabric. The resulting knitted structure is shown schematically in Figure 1-4. The characteristics of the resulting single circular knitted fabric are shown in Table 3-1 below.

[0040] [Table 3-1]

[0041] The characteristics of the circular knitted fabric of Example 18 and the circular knitted fabric of Example 18-2, which had elastic fibers in all courses under the same yarn length conditions, are shown in Table 3-2 below.

[0042] [Table 3-2]

[0043] As shown in Table 3-3 below, the elongation percentage and elongation modulus of the circular knitted fabrics of Example 18 and Example 18-2 are compared. If the elongation modulus is 52% or more after 30 seconds, the phenomenon of not returning to the original shape even after being stretched (bagging phenomenon) is unlikely to occur. [Table 3-3]

[0044] [Example 23] The knit and welt structures were alternately repeated needle by needle, with cupra 56 dtex / 45 filament yarn used in one course, and polyester 84 dtex / 72 filament yarn used in one all-needle knit course. The knitting was performed on a 32G single circular knitting machine with two needles per cycle. The test cloth was disperse dyed at 130°C for 30 minutes using a Mini Color Lab testing machine, to obtain a weft knitted fabric. The resulting knit structure is shown schematically in Figure 1-1. The characteristics of the resulting single knitted fabric are shown in Table 4 below.

[0045] Comparative Example 4 The basic jersey knit structure was adopted, and the same yarn arrangement was used as in Example 1, using cupra 56 dtex / 45 filament yarn in one course and polyester 84 dtex / 72 filament yarn in another course, with the same yarn count. The yarn length conditions were shortened to the limit just before knitting became impossible, resulting in a knitted fabric (tightly knitted jersey) with the highest burst strength among jersey knits. The resulting knit structure is shown in Figure 4.

[0046] Comparative Example 5 The fabric was knitted on a 32G single-needle circular knitting machine with 11 needles per cycle, using cupra 56 dtex / 45 filament yarn in one course, where knit and welt structures alternate needle by needle, and polyester 84 dtex / 72 filament yarn in 10 continuous all-needle knit courses. The test cloth was disperse dyed at 130°C for 30 minutes using a Mini Color Lab testing machine to obtain a weft-knitted fabric. The resulting knitted structure is shown schematically in Figure 6. The characteristics of the resulting single-needle knitted fabric are listed in Table 4 below. When the continuous polyester 84 dtex / 72 filament yarn in the all-needle knit structure is connected in a wale ratio of 10 or more, it becomes difficult to achieve a cellulose blend of 10% or more.

[0047] Comparative Example 6 We attempted to knit six consecutive courses of knit and welt structures, alternating needle by needle, using cupra 56 dtex / 45 filament yarn, and one course of all-needle knit structure using polyester 84 dtex / 72 filament yarn, on a 32G single circular knitting machine, with a structure consisting of seven needles per cycle. It was impossible to knit more than six consecutive courses of knit and welt structures, alternating needle by needle. The knit structure is shown schematically in Figure 7.

[0048] [Example 24] The single circular knit fabric was obtained using the yarn length shown in Table 4 below, and was set with tension in the weft direction to a weight of 72 g / m 2 The burst strength was measured.

[0049] [Example 25] The single circular knit fabric was obtained using the yarn length shown in Table 4 below, and was set with tension in the weft direction to a weight of 68 g / m 2 The burst strength was measured.

[0050] [Example 26] The single circular knit fabric was obtained using the yarn length shown in Table 4 below, and was set with tension in the weft direction to a weight of 30.4 g / m 2 The burst strength was measured.

[0051] [Example 27] The single circular knit fabric was obtained using the yarn length shown in Table 4 below, and was set with tension in the warp direction to a weight of 101 g / m 2 The burst strength was measured.

[0052] [Example 28] Under the same yarn length conditions as the circular knit fabric of Example 23, the first course, in which knit and welt structures alternate needle by needle, was made with cupra 56 dtex / 45 filament yarn; the second course, in which all-needle knit structures alternate needle by needle, was made with polyester 84 dtex / 72 filament yarn; the third course, in which knit and tuck structures alternate needle by needle, was made with polyester 84 dtex / 72 filament yarn; and the fourth course, in which all-needle knit structures alternate needle by needle, was made with polyester 84 dtex / 72 filament yarn. The fabric was knitted on a 32G single-knit circular knitting machine in a four-knit cycle. The test cloth was disperse dyed at 130°C for 30 minutes using a Mini Color Lab testing machine to obtain a weft-knitted fabric. The resulting knit structure is shown schematically in Figure 1-5. The characteristics of the resulting single-knit circular knit fabric are shown in Table 4 below.

[0053] [Example 29] Under the same yarn length conditions as the circular knit fabric of Example 23, polyester 84 dtex / 72 filament yarn was used for three consecutive courses of all-needle knit fabric, and cupra 56 dtex / 45 filament yarn was used for the fourth course, which alternated between knit and welt fabrics, on a 32G single circular knitting machine in a four-needle cycle. The test cloth was disperse dyed at 130°C for 30 minutes using a Mini Color Lab testing machine to obtain a weft knitted fabric. The resulting knitted structure is shown schematically in Figure 1-9. The characteristics of the resulting single circular knitted fabric are shown in Table 4 below.

[0054] [Table 4]

[0055] [Example 30] The knit and welt structures were alternately repeated needle by needle, with cupra 56 dtex / 45 filament yarn used in one course, and polyester 84 dtex / 72 filament yarn used in one all-needle knit course. The knitting was performed on a 36G single circular knitting machine with two needles per cycle. The test cloth was disperse dyed at 130°C for 30 minutes using a Mini Color Lab testing machine, to obtain a weft knitted fabric. The resulting knit structure is shown schematically in Figure 1-1. The characteristics of the resulting single knitted fabric are shown in Table 5 below.

[0056] Comparative Example 7 The basic jersey knit structure was adopted, and the same yarn arrangement was used as in Example 1, using cupra 56 dtex / 45 filament yarn in one course and polyester 84 dtex / 72 filament yarn in another course, with the same yarn count. The yarn length conditions were shortened to the limit just before knitting became impossible, resulting in a knitted fabric (tightly knitted jersey) with the highest burst strength among jersey knits. The resulting knit structure is shown in Figure 4.

[0057] [Comparative Examples 8 to 10] Prior art document JP 2017-516925 A discloses a knitted fabric having a lattice frame in both the warp and weft directions. A knitted fabric with a structure consisting only of a warp frame was reproduced by extracting a portion similar to the knitted structure of the present invention. A single course with a miss weave at the first needle and a knit weave at the second and third needles was knitted using cupra 56 dtex / 45 filament yarn, and a single course with a knit weave at the first needle and a miss-tuck weave at the remaining needles was knitted using polyester 84 dtex / 72 filament yarn in a 36G single circular knit fabric with a two-way cycle. The resulting knitted structure is shown in Figure 5. Note that the knitted structure shown in Figure 5 does not have a portion corresponding to row B. Comparative Example 8 and Example 30 used the same fineness and yarn length conditions. Comparative Example 9 used the same fineness and yarn length conditions as Example 31. Comparative Example 10 used the same fineness and yarn length conditions as Example 32. Therefore, the burst strengths of Comparative Examples 8 to 10, which are knitted structures made of warp frames in the prior art, are compared with Examples 30 to 32, which have different knitted structures under the same conditions of used fineness and yarn length. It was found that the knitted structures of Comparative Examples 8 to 10 have loops in which the knitted loops of cellulose fibers are connected to each other, and therefore have lower burst strengths than the Examples.

[0058] [Examples 31 to 32] A single knit circular knit fabric was obtained in the same manner as in Example 23, except that the yarn length was set to the value shown in Table 5 below. The characteristics of the obtained single knit circular knit fabric are shown in Table 5 below.

[0059] [Table 5] [Industrial Applicability]

[0060] The knitted fabric of the present invention has excellent burst strength, and can be set to a high cellulose content, making it suitable for use in clothing that can be made lighter depending on the application.

Claims

1. A circular knitted fabric comprising cellulose fiber and synthetic fiber, the circular knitted fabric comprising: a row A in which the knitted loops of the synthetic fiber are continuously connected in the wale direction of the knitted fabric; and a row B in which the knitted loops of the cellulose fiber and the knitted loops of the synthetic fiber are alternately connected, the rows A and B being arranged in a ratio of 1:4, 1:3, 1:2, 1:1, 2:2, 3:3, 4:4, 2:1, 3:1, 4:1, 2:3, 2:4, 3:2, 3:4, 4:3, or 4:2; the cellulose fiber content of the knitted fabric is 10% by mass or more and 70% by mass or less; the yarn length of the synthetic fiber is 130 mm / 100W or more and 270 mm / 100W or less; and the yarn length of the cellulose fiber is 1.0 to 1.5 times the yarn length of the synthetic fiber.

2. 2. The circular knitted fabric according to claim 1, wherein the courses made of the cellulose fibers and the courses made of the synthetic fibers are knitted alternately and repeatedly in the wale direction.

3. 3. The circular knitted fabric according to claim 1, wherein the course made of cellulose fiber has knit stitches and welt stitches or tuck stitches alternately repeated, and the course made of synthetic fiber has continuous knit stitches.

4. A circular knitted fabric comprising cellulose fiber and synthetic fiber, the circular knitted fabric comprising: row A in which the knitted loops of the synthetic fiber are continuously connected in the wale direction of the knitted fabric; and row B in which the knitted loops of the cellulose fiber and the knitted loops of the synthetic fiber are connected in the wale direction of the knitted fabric at a ratio of 1 to 5:1 to 9 (excluding 1:1), the rows A and B being arranged in any of the following ratios: 1:4, 1:3, 1:2, 1:1, 2:2, 3:3, 4:4, 2:1, 3:1, 4:1, 2:3, 2:4, 3:2, 3:4, 4:3, or 4:2; the cellulose fiber content of the knitted fabric is 10% by mass or more and 70% by mass or less; the yarn length of the synthetic fiber is 130 mm / 100W or more and 270 mm / 100W or less; and the yarn length of the cellulose fiber is 1.0 to 1.5 times the yarn length of the synthetic fiber.

5. 5. The circular knitted fabric according to claim 4, wherein the courses made of cellulose fibers are formed by alternating knit stitches and welt stitches or tuck stitches, and the courses made of synthetic fibers are formed by continuous knit stitches or by alternating knit stitches and welt stitches or tuck stitches.

6. 6. The circular knit fabric according to claim 1, wherein the rows A and B are arranged in a 1:1 ratio.

7. 6. The circular knitted fabric according to claim 1, wherein the number of loops in the wale direction in row A is 10 or more and 70 or less per inch.

8. The basis weight is 30 g / m when the elastic fiber is removed. ２ 160g / m or more ２ 6. The circular knit fabric of any one of claims 1, 2, 4 and 5, wherein:

9. 6. The circular knit fabric according to claim 1, wherein the cellulose fibers have a fineness of 33 dtex or more and 167 dtex or less, and the synthetic fibers have a fineness of 33 dtex or more and 110 dtex or less.

10. 6. The circular knit fabric of any one of claims 1, 2, 4, and 5, wherein the cellulosic fibers are rayon, cupro, cotton, lyocell, or acetate, and the synthetic fibers are nylon or polyester.

11. 6. The circular knit fabric according to claim 1, wherein elastic fibers are mixed with the cellulosic fibers and / or the synthetic fibers by plying or plating.

12. 6. The circular knit fabric according to claim 1, wherein elastic fibers are mixed with the cellulose fibers and the synthetic fibers by plying or plating, and the elastic fibers are mixed in all courses by plying or plating.

13. 6. The circular knit fabric of any one of claims 1, 2, 4 and 5, which is a single circular knit fabric.

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