An elastic knitted fabric

Abstract

The application discloses an elastic knitted fabric. The fabric contains 30-70% by weight of eccentric core sheath type composite yarns, the elastic elongation of the composite yarns is 50-70%, the sheath component of the composite yarns completely covers the core component, and the sheath component contains sulfur element, and the rest of the yarns in the fabric are acrylic fibers and / or cellulose fibers. The elastic knitted fabric of the application has good wear resistance, excellent color fastness, is warm and comfortable, and is suitable for producing products such as underwear and knitwear.

Description

Technical Field

[0001] This invention belongs to the field of textiles and relates to a knitted fabric, specifically an elastic knitted fabric. Background Technology

[0002] As consumers increasingly prioritize clothing comfort, the use of elastic fabrics is becoming more widespread. With rising living standards, people desire clothing fabrics with a degree of elasticity for a better wearing experience. Currently, most elastic knitted fabrics achieve this by adding spandex, a highly elastic fiber capable of stretching 6-7 times its original length and quickly returning to its initial state after the tension is released. However, spandex is prone to failure after repeated stretching, causing the fabric to lose its elasticity. Furthermore, spandex fibers have poor dyeing properties and colorfastness; moreover, when spandex fibers break, they undergo elastic shrinkage under daily friction, exposing the yarn and causing the fabric to show through. Therefore, developing low- or even ammonia-free elastic fabrics is of great significance.

[0003] Therefore, continuous research has been conducted. For example, Chinese patent document CN 111088709A discloses a core-sheath composite fiber, denim fabric, retro-style denim fabric, and its preparation method. The core and sheath components of the core-sheath composite fiber in this fabric are two polymers with different dyeing mechanisms. After dyeing, a retro-style denim fabric with a whitish surface is obtained through subsequent abrasion processing. However, the abrasion processing damages the surface fibers, affecting the fabric's abrasion resistance.

[0004] For example, Chinese patent document CN 118265821A discloses an eccentric core-sheath composite false twist yarn and a woven or knitted fabric using the same, which does not contain spandex yarn. The fabric obtained using the eccentric core-sheath composite false twist yarn has an elongation rate of over 20%, excellent abrasion resistance during elongation, and is soft and fluffy. However, as can be seen from the disclosed embodiments, the core-sheath component is entirely polyester, requiring the use of disperse dyes for dyeing. During the dyeing process, the dye easily adheres to other fibers in the fabric, resulting in poor color fastness. Summary of the Invention

[0005] The purpose of this invention is to provide an elastic knitted fabric with good abrasion resistance, excellent color fastness, and warmth and comfort.

[0006] The technical solution of this invention is:

[0007] An elastic knitted fabric contains 30-70% by weight of an eccentric core-sheath composite yarn, the composite yarn having an elastic elongation of 50-70%, the sheath component of the composite yarn completely covering the core component, and the sheath component containing sulfur, wherein the yarn in the fabric is acrylic fiber and / or cellulose fiber.

[0008] Preferably, the excess yarn is acrylic fiber and cellulose fiber.

[0009] Preferably, the cellulose fiber is cotton fiber or viscose fiber.

[0010] Preferably, a resin film containing a siloxane polymer component is attached to the fabric.

[0011] Preferably, the depth difference ΔL* between the composite yarn and the excess yarn is 0 to 2.

[0012] Preferably, the elastic elongation of the fabric is 40-60% when tested according to JIS L 1096 2010D; and the elongation recovery rate of the fabric is 50-90% when tested according to JIS L 1096 2010E.

[0013] Preferably, the fabric, after being tested according to JIS L 1096 2010 8.19E, exhibits a colorfastness of grade 3 or higher after 1000 abrasion cycles.

[0014] Preferably, the dry rubbing fastness of the fabric is grade 4 or above, as tested according to JIS L 0849 2013 II method.

[0015] The elastic knitted fabric of the present invention uses a specific content of eccentric core-sheath type composite yarn, which gives the fabric good elasticity, abrasion resistance and color fastness. The fabric also contains acrylic fiber and / or cellulose fiber, which gives the fabric warm and comfortable properties. It can be used in the production of underwear, knitwear and other products. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the cross-sectional shape of the eccentric core-sheath type composite yarn in this invention, wherein 1 is the core component of the composite yarn and 2 is the sheath component of the composite yarn. Detailed Implementation

[0017] The elastic knitted fabric of this invention contains 30-70% by weight of an eccentric core-sheath composite yarn. The sheath component of this composite yarn completely covers the core component, making it less prone to interfacial delamination during friction, thus improving the fabric's abrasion resistance. Furthermore, the eccentric core-sheath composite yarn requires only one dye for dyeing, avoiding the problem of white showing through during dyeing. This composite yarn has an elastic elongation of 50-70%, exhibiting excellent elasticity. If the composite yarn content is less than 30% by weight, the fabric's elasticity is insufficient; if the composite yarn content is greater than 70% by weight, the friction between the yarns intensifies, resulting in poor abrasion resistance.

[0018] In this invention, the core and sheath components of the eccentric core-sheath composite yarn can be made from ordinary polymers or modified polymers. The modified polymers are cationic modified polymers with copolymerizable dyeable groups, modified polymers with added functional particles, etc. In this invention, the core component is preferably one of polypropylene terephthalate (PTT), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polyamide (NY). The sheath component contains anionic sulfonic acid groups, i.e., the sheath component contains sulfur (S). The sheath component is preferably cationic dyeable polyester (CDP), cationic dyeable room-temperature and room-pressure dyeable polyester (ECDP), or cationic modified polyamide (CD-PA), more preferably ECDP. The eccentric core-sheath composite yarn only requires dyeing with cationic dyes; the cationic dyes bond with the sheath component of the eccentric core-sheath composite yarn through ionic bonds, giving the fabric excellent colorfastness.

[0019] In this invention, the excess yarn in the fabric is acrylic fiber and / or cellulose fiber. This excess yarn can be acrylic staple yarn, cellulose staple yarn, or a blend of acrylic and cellulose fibers. Acrylic fiber has good bulkiness and softness, and its low thermal conductivity and excellent warmth retention properties give the fabric good insulation. Cellulose fiber has advantages such as good moisture absorption and a pleasant hand feel; adding a certain amount of cellulose fiber can give the fabric good moisture absorption and improve its comfort.

[0020] The eccentric core-sheath type composite yarn of the present invention does not have a particularly limited fiber morphology. It can be fully drawn yarn (FDY) or drawn-texturing yarn (DTY), with DTY being preferred.

[0021] Preferably, in the elastic knitted fabric of the present invention, the excess yarn is composed of acrylic fiber and cellulose fiber. Considering that the presence of acrylic fiber in a blended yarn of acrylic and cellulose fibers can compensate for the low strength and poor abrasion resistance of cellulose fiber, improving the strength and abrasion resistance of the yarn, the fabric's abrasion resistance tends to improve. Furthermore, the blending of acrylic and cellulose fibers results in short-fiber yarns with fine fuzz on the surface, making the fabric softer and fluffier, and improving its warmth and comfort. Additionally, using blended yarns tends to improve the fabric's colorfastness. Therefore, the excess yarn is more preferably a blended yarn of acrylic and cellulose fibers.

[0022] Preferably, the cellulose fiber in this invention is cotton fiber or viscose fiber. Cotton fiber has high strength and is naturally environmentally friendly, with a trend towards improved fabric comfort and abrasion resistance. Viscose fiber has excellent moisture absorption, with a trend towards improved fabric wearing comfort.

[0023] Preferably, in this invention, a resin film containing a siloxane polymer is attached to the fabric. The Si-O-Si bond in the siloxane polymer has a relatively long bond length and a large bond angle, making it easy to rotate. It has low steric hindrance to the rotation of side chains, large molecular volume and low cohesive energy density, which reduces steric hindrance and makes the free rotation of side groups easier. The energy required to rotate around the silicon-oxygen bond (Si-O) is almost zero. The siloxane polymer can rotate 360°. It is attached to the fabric surface through van der Waals forces and hydrogen bonding, which can give the fabric a smooth and soft property, reduce the friction coefficient of the fabric surface, and improve the abrasion resistance of the fabric.

[0024] Preferably, in the elastic knitted fabric of the present invention, if the remaining yarn contains cellulose fibers, after dyeing with reactive dyes, the cellulose fibers contain structural units of Formula 1 and / or Formula 2 as follows.

[0025]

[0026] Formula 1 represents an ester covalent bond formed between a triazine-type reactive group and cellulose fibers, while Formula 2 represents an ether covalent bond formed between a vinyl sulfone reactive group and cellulose fibers. After dyeing with reactive dyes, the fabric contains one or both of these covalent bonds. The reactive dyes form covalent bonds with the cellulose fibers, allowing the dyes to adhere firmly to the fibers and imparting excellent colorfastness to the fabric.

[0027] In Formula 1, R is one of amino, aromatic amino, and alkoxy groups. The introduction of the R group increases the electron cloud density on the carbon atom of the triazine ring, which can reduce the reactivity of the dye, improve the hydrolytic stability of the covalent bond, and facilitate the dye's more firm adhesion to the fiber, thus improving the color fastness of the fabric. In Formulas 1 and 2, D is one of azo compounds, anthraquinone compounds, and phthalocyanine compounds.

[0028] Preferably, in the elastic knitted fabric of the present invention, if the remaining yarn contains acrylic fibers, after dyeing with cationic dyes, the acrylic fibers contain structural units of the following formula 3, that is, the sulfonic acid anionic group and the cationic dye pigment positive ionic group form ionic bonds. The ionic bond has a strong binding force, and the bond between the dye and the fiber is more firm. During washing and mechanical friction, the dye is not easy to fall off, and the color fastness of the fabric tends to be improved.

[0029]

[0030] In Formula 3, D is one of the following: triarylmethane compounds, heterocyclic compounds, and cyanine compounds. Introducing a cyanoethyl group into the amino nitrogen atom to reduce the basicity of the amino group and replacing the methyl group tends to improve the light fastness of the fabric. Furthermore, due to the ionic bonding between the dye and the fiber, the water fastness and rubbing fastness also tend to be further improved.

[0031] Preferably, in the elastic knitted fabric of the present invention, the depth difference ΔL* between the eccentric core-sheath composite yarn and the excess yarn is 0 to 2. The smaller the depth difference ΔL* between the eccentric core-sheath composite yarn and the excess yarn, the better the color matching. When the ΔL* value is greater than 2, the color matching of the fabric tends to decrease.

[0032] Preferably, the elastic knitted fabric of the present invention, when tested according to JIS L 1096 2010D, has an elastic elongation rate of 20-60%; when tested according to JIS L 1096 2010E, the elongation recovery rate of the fabric is 30-90%.

[0033] Preferably, the elastic knitted fabric of the present invention, when tested according to JIS L 1096 2010 8.19E method, exhibits a colorfastness of grade 3 or higher after 1000 abrasion cycles. A higher colorfastness indicates better abrasion resistance of the fabric.

[0034] Preferably, the elastic knitted fabric of the present invention, when tested according to JIS L 1096 2010 8.19E, can withstand abrasion for up to 18,000 cycles before breaking. The higher the abrasion resistance count, the better the abrasion resistance of the fabric.

[0035] Preferably, the elastic knitted fabric of the present invention, when tested according to JIS L 0849 2013 II method, has a dry rubbing color fastness of grade 4 or above.

[0036] Preferably, the elastic knitted fabric of the present invention, when tested according to JIS L 0844:2011, has a colorfastness to washing of fading of grade 4-5.

[0037] Preferably, the elastic knitted fabric of the present invention, when tested according to the Omaru method, has a color fastness of 4-5.

[0038] The structure of the elastic knitted fabric of this invention is not particularly limited, but can be exemplified by weft plain knit, rib knit, double reverse knit, etc.

[0039] The elastic knitted fabric of the present invention is not particularly limited in its manufacturing method and can be obtained by the following method:

[0040] A knitted fabric greige with an eccentric core-sheath composite yarn content of 30–70% by weight is selected and processed according to the following process: scouring → intermediate setting (temperature: 180℃–200℃, time: 1–2 min) → dyeing → padding → finishing and setting. The excess yarn in the greige fabric can be acrylic staple yarn, cellulose staple yarn, or a blend of acrylic and cellulose fibers.

[0041] The refining conditions were as follows: The reagent used was a refining degreasing agent (components: surfactant and ethylene glycol ether) 2 g / L, 30% hydrogen peroxide 4 g / L, sodium hydroxide 1 g / L, with a bath ratio of 1:50. The mixture was treated at 80℃ for 30 minutes, then washed with room temperature water and dried at 60–80℃.

[0042] The dyeing and processing conditions are as follows:

[0043] When the fabric contains eccentric core-sheath composite yarn and acrylic fiber, the following conditions are adopted: treatment at 110℃ for 40 minutes, followed by drying at 60~80℃, using cationic dye (2~5% owf), dyeing acid 2g / L, leveling agent 1g / L, and liquor ratio 1:20.

[0044] When the fabric contains eccentric core-sheath composite yarn and cellulose fiber, the following conditions are used: First, dye the eccentric core-sheath composite yarn at 110℃ for 40 minutes, then dry it at 60-80℃. The dye used is a cationic dye (2-5% owf), dyeing acid 2 g / L, leveling agent 1 g / L, and a liquor ratio of 1:20. Next, dye the cellulose yarn at 60℃ for 60 minutes, then dry it at 60-80℃. The dye used is a reactive dye (2-5% owf), sodium carbonate 20 g / L, sodium sulfate 60 g / L, and a liquor ratio of 1:20.

[0045] When the fabric contains eccentric core-sheath composite yarn, acrylic fiber and cellulose fiber, the following conditions shall be adopted: first dye the eccentric core-sheath composite yarn and acrylic fiber, and then dye the cellulose fiber. The dyeing method shall refer to the above-described content.

[0046] Pulping processing conditions: Pulping is performed using a resin processing liquid containing siloxane polymers. It can be one dip and one roll or two dips and two rolls. The roll ratio is controlled at 40-80% by weight. Finally, it is heat-treated at a temperature of 110-130℃ for 2-5 minutes. One dip and one roll is preferred.

[0047] Without affecting the purpose of this invention, dyes, auxiliaries and other functional resins may be added during the processing as needed.

[0048] The present invention will be further described below with reference to embodiments and comparative examples.

[0049] The testing methods for each parameter involved in this invention are as follows:

[0050] (1) Cross-section of eccentric core-sheath type composite yarn

[0051] The yarns in the fabric to be tested were disassembled and classified. The morphology of the cross-section of the composite yarn was observed using a scanning electron microscope. If there were any attached yarns... Figure 1 The cross-sectional shape indicates that the fabric contains eccentric core-sheath type composite yarns.

[0052] (2) Determination of the content of eccentric core-sheath type composite yarn

[0053] Five pieces of fabric, each 20cm x 20cm in size and flat and without wrinkles, were cut as test samples. The weight of each sample was recorded as G, accurate to 0.1mg. The samples were then disassembled to separate all the yarns.

[0054] The eccentric core-sheath type composite yarn was determined according to the determination method in (1) above. The disassembled composite yarn was weighed and recorded as g1, accurate to 0.1 mg. Finally, the content was calculated according to the formula below.

[0055] Content M = (g1 / G) * 100%.

[0056] Repeat the above steps 20 times, and take the average of the 20 sets of data as the final result.

[0057] (3) Elastic elongation of eccentric core-sheath type composite yarn

[0058] The elastic elongation of the eccentric core-sheath type composite yarn was measured according to the JIS L1090-1992 standard.

[0059] (4) Qualitative analysis of fibers

[0060] Three pieces of fabric, each 20cm x 20cm in size and flat and without wrinkles, were cut as test samples. The samples were then disassembled to separate all the yarns.

[0061] Referring to Part II of FZ / T 01057.4-2007 "Test Methods for Identification of Textile Fibers"—the combustion method—the presence of a paper-like odor during combustion indicates the presence of cellulose fibers in the fabric. Referring to Part III of FZ / T 01057.4-2007 "Test Methods for Identification of Textile Fibers"—the microscopic method—fibers with a circular cross-section, smooth surface, grooves, or fine stripes are acrylic fibers. A serrated cross-section indicates that the cellulose fibers in the fabric are viscose; a kidney-shaped cross-section indicates that the cellulose fibers in the fabric are cotton.

[0062] (5) Determination of sulfur element

[0063] The fiber surface morphology of the eccentric core-sheath composite yarn was photographed using a SEM device (TM3030Plus). The elemental composition of the yarn surface was analyzed using the Iridium Ultra elemental analysis software.

[0064] (6) Qualitative analysis of resin components

[0065] The fabric sample to be tested was cut into 2g fine fragments and placed inside a filter paper sleeve. Cyclohexanone was used as the extraction solvent. When the solvent containing the fine fragments was heated to boiling, the vapor rose through the gas delivery tube and was condensed into liquid, which dripped into the extractor. When the liquid level exceeded the highest point of the siphon tube, a siphon phenomenon occurred, and the solution flowed back into the flask, allowing the soluble substances to be extracted. The extract was then dropped into a chloroform solution to precipitate a solid. This process of dissolving and precipitating the sample was repeated 3–5 times to obtain a purified solid sample.

[0066] Take 1–2 mg of the purified solid sample and mix it with 200 mg of dried potassium bromide. Then, compress the mixture into a film and measure its infrared spectrum using an infrared spectrometer. The infrared spectrum is in the range of 1000–1250 cm⁻¹. -1 If a characteristic absorption peak appears at 1108 cm⁻¹, it is attributed to a siloxane group. -1 With 1022cm -1 The absorption peak at 1260 cm⁻¹ is the stretching vibration peak of Si-O-Si. -1 865cm -1 803cm -1 The area at this point represents a characteristic absorption peak for Si-C. The presence of these characteristic absorption peaks indicates that the fabric is coated with a resin film containing siloxane polymer components.

[0067] (7) Depth difference ΔL*

[0068] The yarns in the fabric to be tested are disassembled and classified. A benchtop spectrophotometer (Spectro 1000 series, manufactured by Datacolor) is used to test the depth value L* of each yarn, and then the depth difference ΔL* between each yarn is calculated.

[0069] (8) Elastic elongation and elongation recovery

[0070] The elastic elongation was tested according to the JIS L 1096 2010D method.

[0071] The elongation recovery rate was tested according to the JIS L 1096 2010E method.

[0072] (9) Abrasion resistance test

[0073] Characterized by colorfastness and / or abrasion resistance.

[0074] Test standard: Tested according to JIS L 1096 2010 8.19E.

[0075] (10) Dry friction fastness test

[0076] Tested according to JIS L 0849 2013 II method.

[0077] The present invention will be further described below with reference to embodiments and comparative examples, but the implementation of the present invention is not limited thereto.

[0078] The pharmaceutical agents used in the following examples and comparative examples are as follows:

[0079] Agent A: The main component is polydimethylsiloxane polymer, trade name 743, manufactured by Nantong Jiongyi Printing and Dyeing Auxiliaries Co., Ltd.

[0080] Reagent B: The main component is a polyester polymer, trade name PR-100, manufactured by Nichih Chemical (China) Co., Ltd.

[0081] Dye A: Triazine type and vinyl sulfone dual reactive dye, trade name Sumifix Supra reactive black dye, manufactured by Sumitomo Corporation of Japan.

[0082] Dye B: Cationic dye, trade name NICHILON TR cationic dye, manufactured by Nisshin Chemical Co., Ltd. The resin films in the following examples and comparative examples are as follows:

[0083] Resin film A: Contains polydimethylsiloxane

[0084] Resin film B: Contains polyester polymers

[0085] Example 1

[0086] The fabric is woven on a 32G circular knitting machine (Fukuhara Seiki Co., Ltd.). Yarn 1 is a 60dtex-36f eccentric core-sheath composite DTY yarn, with PBT as the core component and ECDP as the sheath component, containing sulfur. Yarn 2 is a 50S acrylic staple fiber yarn. Yarn 1 accounts for 50% by weight of the fabric, and yarn 2 accounts for 50% by weight of the fabric. The fabric is a plain weave structure. The fabric is then finished and processed, including scouring (80℃*20min, scouring degreasing agent 583 2g / L) → intermediate setting (200℃×1min) → dyeing (110℃×40min, dye B 4% owf, dyeing acid 2g / L, leveling agent 1g / L) → soaping (80℃×20min, soaping agent DGZ 3g / L) → resin processing (one dip and one nip, nip rate 70±5%) → finishing and setting (130℃×2min) to obtain the elastic knitted fabric of the present invention. The test results of various properties are shown in Table 1.

[0087] The composition of the resin processing fluid is as follows:

[0088] Drug A 20g / L

[0089] The rest is soft water.

[0090] Example 2

[0091] The 50S acrylic staple fiber yarn was replaced with 50S cotton staple fiber yarn for weaving. The greige fabric was then finished and processed, including scouring (80℃*20min, scouring degreasing agent 583 2g / L) → intermediate setting (200℃×1min) → dyeing (110℃×40min, dye B 4% owf, dyeing acid 2g / L, leveling agent 1g / L) → soaping (80℃×20min, soaping agent DGZ 3g / L) → dyeing (60℃×60min, dye A 4% owf, sodium carbonate 20g / L, sodium sulfate 60g / L) → soaping (80℃×20min, soaping agent R-001Z 3g / L) → resin processing (one dip and one nip, nip rate 70±5%) → finishing and setting (130℃×2min). The rest was the same as in Example 1, resulting in the elastic knitted fabric of the present invention. The test results of various properties are shown in Table 1.

[0092] Example 3

[0093] The 50S cotton staple fiber yarn was replaced with a 50S acrylic 60 / cotton 40 blended yarn, and the content of the blended yarn in the fabric was 50% by weight. The rest was the same as in Example 2. The elastic knitted fabric of the present invention was obtained, and the test results of various performances are shown in Table 1.

[0094] Example 4

[0095] The 50S acrylic 60 / cotton 40 blended yarn was replaced with a 50S acrylic 60 / viscose 40 blended yarn, and the content of the blended yarn in the fabric was 50% by weight. The rest was the same as in Example 3, and the elastic knitted fabric of the present invention was obtained. The test results of various properties are shown in Table 1.

[0096] Example 5

[0097] The resin processing fluid was replaced with agent B, and the rest was the same as in Example 3, to obtain the elastic knitted fabric of the present invention. The test results of various properties are shown in Table 1.

[0098] The composition of the resin processing fluid is as follows:

[0099] Drug B 20g / L

[0100] The rest is soft water.

[0101] Example 6

[0102] The content of eccentric core-sheath type composite DTY yarn in the fabric was adjusted to 30% by weight, and the content of blended yarn in the fabric was 70% by weight. The rest was the same as in Example 3, and the elastic knitted fabric of the present invention was obtained. The test results of various performances are shown in Table 1.

[0103] Example 7

[0104] The content of eccentric core-sheath type composite DTY yarn in the fabric was adjusted to 70% by weight, the content of blended yarn in the fabric was 30% by weight, and the rest was the same as in Example 3, so as to obtain the elastic knitted fabric of the present invention. The test results of various performances are shown in Table 1.

[0105] Example 8

[0106] By changing the eccentric core-sheath type composite DTY yarn, the core component is NY and the sheath component is ECDP, and the rest is the same as in Example 3, the elastic knitted fabric of the present invention is obtained, and the test results of various properties are shown in Table 1.

[0107] Comparative Example 1

[0108] The eccentric core-sheath type composite DTY yarn was changed, with the core component being PBT, the sheath component being PET, and the sheath component not containing sulfur. The rest was the same as in Example 1, resulting in an elastic knitted fabric. The test results of various properties are shown in Table 1.

[0109] Comparative Example 2

[0110] The content of eccentric core-sheath type composite DTY yarn in the fabric was adjusted to 80% by weight, and the content of acrylic staple fiber yarn in the fabric was adjusted to 20% by weight. The rest was the same as in Example 1, and an elastic knitted fabric was obtained. The test results of various properties are shown in Table 1.

[0111]

[0112] According to the table above:

[0113] (1) As can be seen from Examples 1 and 3, under the same conditions, the elastic knitted fabric containing acrylic short fiber yarn has slightly weaker color similarity than the elastic knitted fabric containing acrylic / cotton blended yarn. The elastic elongation, elongation recovery, abrasion resistance and dry rubbing fastness of the two are comparable.

[0114] (2) As can be seen from Examples 2 and 3, under the same conditions, compared with elastic knitted fabrics containing acrylic / cotton blended yarns, the former of elastic knitted fabrics containing cotton yarns has slightly weaker colorfastness, elastic elongation, elongation recovery, abrasion resistance and dry rubbing fastness.

[0115] (3) As can be seen from Examples 5 and 3, under the same conditions, the elastic knitted fabric with polyester polymer on the surface is weaker in abrasion resistance and dry rubbing fastness than the elastic knitted fabric with polydimethylsiloxane resin on the surface, while the color similarity, elastic elongation and elongation recovery of the two are comparable.

[0116] (4) As can be seen from Comparative Example 1 and Example 1, under the same conditions, the color similarity of the elastic knitted fabric with sheath component without S element is far inferior to that of the elastic knitted fabric with sheath component containing S element. The elastic elongation, elongation recovery rate and abrasion resistance of the two are comparable.

[0117] (5) As can be seen from Comparative Example 2 and Example 1, under the same conditions, the elastic knitted fabric with 80% eccentric core sheath composite yarn content in the fabric is inferior to the elastic knitted fabric with 50% eccentric core sheath composite yarn content in the fabric in terms of color matching, abrasion resistance and dry rubbing fastness.

Claims

1. An elastic knitted fabric, characterized in that: The fabric contains 30-70% by weight of eccentric core-sheath type composite yarn, the elastic elongation of the composite yarn is 50-70%, the sheath component of the composite yarn completely covers the core component, and the sheath component contains sulfur element, and the remaining yarn in the fabric is acrylic fiber and / or cellulose fiber.

2. The elastic knitted fabric according to claim 1, characterized in that: The remaining yarn consists of acrylic fibers and cellulose fibers.

3. The elastic knitted fabric according to claim 1 or 2, characterized in that: The cellulose fiber is cotton fiber or viscose fiber.

4. The elastic knitted fabric according to claim 1 or 2, characterized in that: A resin film containing siloxane polymer components is attached to the fabric.

5. The elastic knitted fabric according to claim 1 or 2, characterized in that: The depth difference ΔL* between the composite yarn and the excess yarn is 0 to 2.

6. The elastic knitted fabric according to claim 1 or 2, characterized in that: According to JIS L 1096 2010D, the elastic elongation of the fabric is 20-60%; according to JIS L 1096 2010E, the elongation recovery rate of the fabric is 30-90%.

7. The elastic knitted fabric according to claim 1 or 2, characterized in that: According to JIS L 10962010 8.19E, after 1000 abrasion cycles, the colorfastness of the fabric is grade 3 or above.

8. The elastic knitted fabric according to claim 1 or 2, characterized in that: According to the JIS L 08492013 II method, the dry rubbing fastness of the fabric is grade 4 or above.

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