Soft elastic sandwich fabric with moisture absorption, air permeability and flat wrapping, and its application and preparation method

Abstract

The present invention discloses a flexible elastic sandwich fabric with moisture absorption, air permeability and flat wrapping, and its application and preparation method, belonging to the technical field of functional textile materials. The present invention uses regenerated cellulose fiber, spandex filament, semi-dull polyester filament, and cross-section moisture-absorbing and exhausting semi-dull polyester filament as raw materials, and through a specific weaving process, obtains a flexible elastic sandwich fabric with both moisture absorption, air permeability and flat wrapping feeling. The fabric of the present invention has both moisture absorption, air permeability, soft skin-friendly, Q-elastic support feeling, flat appearance and elastic recovery wrapping feeling, and is suitable for products such as bed sheets, pillowcases, clothing, etc. for all seasons.

Description

Technical Field

[0001] The present invention relates to a flexible elastic sandwich fabric with moisture absorption, air permeability and flat wrapping, its application and preparation method, belonging to the technical field of functional textile materials. Background Art

[0002] With the improvement of people's living standards and the pursuit of a healthy lifestyle, the demand for functional fabrics is increasing day by day. Among many demands, moisture absorption, air permeability and a flat wrapping feeling are important development directions of modern clothing fabrics. For example, in the field of sportswear, good moisture absorption and air permeability can effectively absorb the sweat discharged by the human body, keep the skin dry, and avoid the stuffiness and discomfort caused by the accumulation of sweat. In addition, a flat fabric wrapping feeling can provide better fit for the wearer, reduce the friction between the clothing and the skin, and improve the wearing comfort.

[0003] However, there are still some deficiencies in the existing fabric technologies in achieving moisture absorption, air permeability and a flat wrapping feeling. For example, some fabrics have good moisture absorption but poor air permeability, resulting in obvious stuffiness during wearing. While some other fabrics have good air permeability but perform poorly in moisture absorption and sweat discharge, unable to meet the needs of the human body in sports or high-temperature environments. In addition, when some fabrics pursue softness and comfort, they often sacrifice elasticity and flatness, resulting in a lack of support during wearing.

[0004] In order to overcome these deficiencies, there have been various attempts of composite fabrics and functional fiber fabrics in the market. For example, fabrics with a multi-layer structure design are used to achieve multiple functions such as moisture absorption, air permeability and warmth through the fiber characteristics of different layers. However, the preparation processes of these fabrics are often relatively complex, and in actual use, the bonding strength and functional stability between layers still need to be further optimized.

[0005] Therefore, developing a flexible elastic sandwich fabric with both moisture absorption, air permeability and flat wrapping is of great significance for meeting the high-performance requirements of modern clothing and home textile fabrics. Such a fabric should be able to effectively absorb and dissipate human sweat, and at the same time provide good elasticity and fit to meet the needs of various wearing and usage scenarios such as sports, leisure and sleep. Summary of the Invention

[0006] Conventional multifunctional fabrics have problems such as complex preparation processes, poor stability, and it is difficult to balance moisture absorption, air permeability and flat wrapping feeling.

[0007] To solve the above problems, the present invention provides a soft and elastic sandwich fabric with moisture absorption, breathability, and flat wrapping. The present invention uses regenerated cellulose fiber, spandex filament, semi-dull polyester filament, and cross-section moisture absorption and drainage semi-dull polyester filament as raw materials, and through a specific weaving process, obtains a soft and elastic sandwich fabric with both moisture absorption, breathability, and flat wrapping feeling. The fabric finished product of the present invention has the characteristics of moisture absorption, breathability, soft skin-friendly, Q-elastic support feeling, flat appearance, and elastic recovery wrapping feeling, and is suitable for products such as bed sheets, pillowcases, and clothing for all seasons.

[0008] The first object of the present invention is to provide a method for preparing a soft and elastic sandwich fabric with moisture absorption, breathability, and flat wrapping, including the following steps:

[0009] The regenerated cellulose fiber is used as the first yarn and knitted full needle to form a loop structure;

[0010] The spandex filament is used as the second yarn and knitted full needle to form a loop structure;

[0011] The semi-dull polyester filament is used as the third yarn and knitted full needle to form a loop structure;

[0012] The semi-dull polyester filament is used as the fourth yarn and knitted 1 by 1 to form a tuck structure;

[0013] The cross-section moisture absorption and drainage semi-dull polyester filament is used as the fifth yarn and knitted full needle to form a loop structure;

[0014] The spandex filament is used as the sixth yarn and knitted full needle to form a loop structure;

[0015] The regenerated cellulose fiber is used as the seventh yarn and knitted full needle to form a loop structure;

[0016] The spandex filament is used as the eighth yarn and knitted full needle to form a loop structure;

[0017] The semi-dull polyester filament is used as the ninth yarn and knitted full needle to form a loop structure;

[0018] The semi-dull polyester filament is used as the tenth yarn and knitted 1 by 1 to form a tuck structure, and it is a cross tuck with the fourth yarn;

[0019] The cross-section moisture absorption and drainage semi-dull polyester filament is used as the eleventh yarn and knitted full needle to form a loop structure;

[0020] The spandex filament is used as the twelfth yarn and knitted full needle to form a loop structure;

[0021] Taking 12 paths as a cycle, the 1st and 7th paths form the surface layer, the 2nd and 8th paths form the subsurface layer, the 3rd and 9th paths form the re-subsurface layer, the 4th and 10th paths form the hollow layer, the 5th and 11th paths form the sub-inner layer, and the 6th and 12th paths form the inner layer; through circular knitting, a soft and elastic sandwich fabric with both moisture absorption, breathability and a smooth wrapping feeling is obtained.

[0022] Optionally, the regenerated cellulose fibers of the 1st and 7th paths are Ucos / Mohair compact spun yarns, with a specification of 60 - 80 English counts; more specifically, it is 80 English counts, 80% 0.9D Ucos and 20% 0.9D Mohair compact spun yarn.

[0023] Optionally, the specification of the spandex filaments of the 2nd and 8th paths is 20 - 30D.

[0024] Optionally, the specification of the semi-dull polyester filament of the 3rd and 9th paths is 50D / 36F, 50D / 48F or 30D / 24F semi-dull polyester filament (low-elastic light-net semi-dull polyester filament).

[0025] Optionally, the specification of the semi-dull polyester filament of the 4th and 10th paths is 50D / 36F, 50D / 48F or 30D / 24F semi-dull polyester filament (low-elastic light-net semi-dull polyester filament).

[0026] Optionally, the specification of the cross-section moisture-absorbing and moisture-discharging semi-dull polyester filament of the 5th and 11th paths is 50D / 36F, 50D / 48F or 30D / 24F cross-section moisture-absorbing and moisture-discharging semi-dull polyester filament.

[0027] Optionally, the specification of the spandex filaments of the 6th and 12th paths is 20 - 30D.

[0028] Optionally, the loom is a circular weft knitting machine, a 32G - 36G double-sided machine.

[0029] Optionally, the yarn length of the 1st and 7th paths is 21 - 24mm, and the tension is 8 - 12cN;

[0030] The yarn length of the 2nd and 8th paths is 10 - 12mm, and the tension is 4 - 6cN;

[0031] The yarn length of the 3rd and 9th paths is 19 - 21mm, and the tension is 4 - 6cN;

[0032] The yarn length of the 4th and 10th paths is 19 - 21mm, and the tension is 14 - 16cN;

[0033] The yarn length of the 5th and 11th paths is 21 - 23mm, and the tension is 4 - 6cN;

[0034] The yarn length of the 6th and 12th paths is 10 - 12mm, and the tension is 8 - 12cN;

[0035] Further preferably, the yarn lengths of the 1st and 7th yarns are 23 mm and the tensions are 10 cN;

[0036] The yarn lengths of the 2nd and 8th yarns are 11 mm and the tensions are 5 cN;

[0037] The yarn lengths of the 3rd and 9th yarns are 20 mm and the tensions are 5 cN;

[0038] The yarn lengths of the 4th and 10th yarns are 20 mm and the tensions are 15 cN;

[0039] The yarn lengths of the 5th and 11th yarns are 22 mm and the tensions are 5 cN;

[0040] The yarn lengths of the 6th and 12th yarns are 11 mm and the tensions are 10 cN.

[0041] The second object of the present invention is a soft and elastic sandwich fabric with moisture absorption, air permeability, and flat wrapping prepared by the method described in the present invention.

[0042] Optionally, the gram weight of the soft and elastic sandwich fabric with both moisture absorption, air permeability, and a sense of flat wrapping is 200 - 280 g / m 2 .

[0043] The third object of the present invention is to provide a method for preparing a finished product of a soft and elastic sandwich fabric with both moisture absorption, air permeability, and a sense of flat wrapping, including the following steps:

[0044] Dye the soft and elastic sandwich fabric with both moisture absorption, air permeability, and a sense of flat wrapping to obtain a finished product of the soft and elastic sandwich fabric with both moisture absorption, air permeability, and a sense of flat wrapping.

[0045] Optionally, the dyeing process is as follows:

[0046] Unroll and relax the fabric, flat - width ultrasonic water washing, pre - setting, dyeing, dehydration, drying, setting, finished product;

[0047] Among them, the dyeing is divided into 2 steps. First, disperse dyes are used for dyeing, and then reactive dyes are used for dyeing;

[0048] The temperature of pre - setting is 180 - 190 °C, the machine speed is 10 - 30 m / min, the number of machine frames is 8 - 12 sections; the air volume is 100%, the overfeed is 20 - 40%, and the dosage of the auxiliary degreasing agent is 1 - 3%. Further preferably, the temperature of pre - setting is 180 °C, the machine speed is 25 m / min, the number of machine frames is 10 sections; the air volume is 100%, the overfeed is 35%, and the dosage of the auxiliary degreasing agent is 2%;

[0049] The setting temperature is 140 - 170 °C, the machine speed is 25 - 35 m / s, the machine frame is 86 inches, the air volume is 60 - 85%, the overfeed is 10 - 20%, and the dosage of the auxiliary softener is 4 - 6%. Further preferably, the setting temperature is 140 °C, the machine speed is 30 m / s, the machine frame is 86 inches, the air volume is 80%, the overfeed is 12%, and the dosage of the auxiliary softener is 5%.

[0050] The fourth object of the present invention is a finished soft elastic sandwich fabric with moisture absorption, air permeability, and flat wrapping prepared by the method described in the present invention.

[0051] The fifth object of the present invention is the application of the finished soft elastic sandwich fabric with moisture absorption, air permeability, and flat wrapping described in the present invention in functional textiles.

[0052] Optionally, the functional textiles include products such as bed sheets, pillowcases, and clothing for all seasons.

[0053] The sixth object of the present invention is to provide a bed sheet for all seasons, which uses the soft elastic sandwich fabric with moisture absorption, air permeability, and flat wrapping described in the present invention.

[0054] Beneficial effects:

[0055] (1) The present invention uses special yarns, weaving structures, and dyeing and finishing processes to produce a fabric that combines moisture absorption, air permeability, softness and skin-friendliness, Q-elastic support, flat appearance, and good elastic recovery and wrapping properties, and is suitable for products such as bed sheets, pillowcases, and clothing for all seasons.

[0056] (2) The fabric of the present invention has excellent performance, specifically as follows:

[0057] Flat and delicate: 36-needle knitting process, the face yarn uses 80 / 80 0.9D Eunice 20% 0.9D Modal compact spun yarn, the bottom yarn uses 50D / 48F low-elastic light net semi-dull polyester filament, and both the front and back sides are more flat and delicate;

[0058] Lightweight and temperature-regulating, using ultra-fine fibers, and not increasing the fabric weight due to the six-layer structure (fabric weight 220 g). The six-layer structure locks more air, having better temperature-regulating and fluffiness;

[0059] Soft and shaped, using ultra-fine fibers plus spandex, the fabric is soft and elastic. The special six-layer weaving structure makes the fabric more stable and the shape more upright and shaped;

[0060] Q-elastic and fleshy, with a special six-layer structure and an air layer in the middle, the fabric has a certain thickness, with a strong waxy feeling and resilience.

[0061] No pilling, the surface layer uses 80 / 80 compact spun yarn, the weaving structure is tight, and the pilling resistance can reach 3 - 4 levels;

[0062] It does not snag. The filament quilt is covered under the surface layer, and the middle layer and the bottom layer do not directly contact the human body, which can better improve snagging, and the snagging performance can reach Grade 3-4.

[0063] Good tensile elastic recovery: The tensile elastic recovery rates in the straight and transverse directions are 80%-100%.

[0064] Stable structure, good elasticity and recovery, good air permeability and moisture permeability, good wrinkle resistance, slightly cool, cool but not icy.

[0065] Good wear resistance and excellent antistatic performance. Description of the Drawings

[0066] Figure 1 It is the organizational structure diagram of the soft and elastic six-layer sandwich fabric with moisture absorption, air permeability and flat wrapping in Example 1;

[0067] Figure 2 It is the schematic cross-sectional structure diagram of the soft and elastic six-layer sandwich fabric with moisture absorption, air permeability and flat wrapping in Example 1;

[0068] Figure 3 It is the process diagram of disperse dyeing in Example 2;

[0069] Figure 4 It is the process diagram of reactive dyeing in Example 2. Detailed Embodiments

[0070] The following are the preferred embodiments of the present invention. It should be understood that the embodiments are for better explaining the present invention and are not used to limit the present invention.

[0071] Testing methods:

[0072] 1. Pilling performance test:

[0073] GB / T 4802.1-2008 circular track method, pilling 600 times, pressure 780 cN, standard value and tolerance ≥3-4.

[0074] 2. Pilling performance test after 2000 times of friction:

[0075] GB / T 4802.2-2008, abrasive: the fabric itself, pressure: 155 g.

[0076] 3. Snagging performance test:

[0077] GB / T 11047-2008, standard value and tolerance: straight direction ≥3-4 grades, transverse direction ≥3-4 grades.

[0078] 4. Tensile elastic elongation rate test:

[0079] FZ / T 70006-2022, Clamping distance: 100 mm, Speed: 300 mm / min, Fixed force: 15 N, Number of stretching times: 2 times, Pre-tension: 2 N.

[0080] 5. Tensile elastic recovery rate (%) test:

[0081] FZ / T 70006-2022, Clamping distance: 100 mm, Speed: 300 mm / min, Fixed force: 15 N, Number of stretching times: 2 times, Pre-tension: 2 N.

[0082] 6. Moisture permeability test:

[0083] GB / T 12704.1-2009, Test chamber environment: 38.0℃ 90.0%, Moisture permeability time: 1 h, Method: Moisture absorption method.

[0084] 7. Air permeability (mm / s) test:

[0085] GB / T 5453-1997, Pressure drop: 100 Pa, Test area: 20 cm 2 , Right side up.

[0086] 8. Wrinkle resistance (grade) test:

[0087] GB / T 29257-2012, Standard value and tolerance: 3 - 4 grades.

[0088] 9. Contact cool feeling coefficient test:

[0089] GB / T 35263-2017; Loading platform material: Polystyrene foam; Instrument model: Roaches QMax; Hot plate temperature: 35.0℃; Cold plate temperature: 20.0℃.

[0090] 10. Abrasion resistance (10,000 revolutions) (times) front side test:

[0091] GB / T 21196.2-2007, Load: 9 kPa, Abrasive: Wool abrasive.

[0092] 11. Static voltage half-life test:

[0093] GB / T 12703.1-2021, Temperature: 20.1℃, Relative humidity: 37.5%.

[0094] 12. Washing performance test:

[0095] Dimensional change: GB / T 8629-2017 Type A, Washing machine program: 10x4 N, Hang to dry.

[0096] Testing after drying: GB / T 13769-2009 A-type washing machine 5 times washing and drying cycle program: 5A, tumbling drying.

[0097] Raw materials used in the embodiment:

[0098] 80s Ucos / Mmodal compact siro spinning yarn: 80s, 80% 0.9D Ucos, 20% 0.9D Modal compact siro spinning yarn.

[0099] Semi-dull polyester filament: low-elastic light-net semi-dull polyester filament;

[0100] Loom: circular weft knitting machine, 34 inches, 36 needles.

[0101] First embodiment:

[0102] A method for preparing a soft and elastic sandwich fabric with moisture absorption, breathability and flat wrapping (as Figure 1 and Figure 2 ), including the following steps:

[0103] 80s Ucos / Mmodal compact siro spinning yarn as the first yarn path, knitting full needles to form a loop structure;

[0104] 20D spandex as the second yarn path, knitting full needles to form a loop structure;

[0105] 30D / 24F semi-dull polyester filament as the third yarn path, knitting full needles to form a loop structure;

[0106] 30D / 24F semi-dull polyester filament as the fourth yarn path, knitting 1 stitch in 2 to form a tuck structure;

[0107] 50D / 48F cross-section moisture absorption and drainage semi-dull polyester filament as the fifth yarn path, knitting full needles to form a loop structure;

[0108] 20D spandex as the sixth yarn path, knitting full needles to form a loop structure;

[0109] 80s Ucos / Mmodal compact siro spinning yarn as the seventh yarn path; knitting full needles to form a loop structure;

[0110] 20D spandex as the eighth yarn path; knitting full needles to form a loop structure;

[0111] 30D / 24F semi-dull polyester filament as the ninth yarn path, knitting full needles to form a loop structure;

[0112] 30D / 24F semi-dull polyester filament as the tenth yarn path, knitting 1 stitch in 2 to form a tuck structure, which is a cross tuck with the fourth path;

[0113] The 50D / 48F cross-sectional suction and exhaust semi-dull polyester filament is used as the 11th yarn, and full-needle knitting is carried out to form a loop structure;

[0114] The 20D spandex filament is used as the 12th yarn, and full-needle knitting is carried out to form a loop structure;

[0115] 12 rows form a cycle. The 1st and 7th rows form the surface layer, the 2nd and 8th rows form the secondary surface layer, the 3rd and 9th rows form the re-surface layer, the 4th and 10th rows form the hollow layer, the 5th and 11th rows form the secondary inner layer, and the 6th and 12th rows form the inner layer;

[0116] Circular knitting is carried out to obtain a soft and elastic six-layer sandwich fabric with both moisture absorption, breathability and a smooth wrapping feeling, and the gram weight is 220 g / m 2 ;

[0117] Among them, the yarn length of the 1st and 7th yarns is 23 mm, and the tension is 10 cN;

[0118] The yarn length of the 2nd and 8th yarns is 11 mm, and the tension is 5 cN;

[0119] The yarn length of the 3rd and 9th yarns is 20 mm, and the tension is 5 cN;

[0120] The yarn length of the 4th and 10th yarns is 20 mm, and the tension is 15 cN;

[0121] The yarn length of the 5th and 11th yarns is 22 mm, and the tension is 5 cN;

[0122] The yarn length of the 6th and 12th yarns is 11 mm, and the tension is 10 cN.

[0123] Second embodiment:

[0124] A method for preparing a finished product of a soft and elastic six-layer sandwich fabric with moisture absorption, breathability and smooth wrapping, comprising the following steps:

[0125] Dye the soft and elastic six-layer sandwich fabric with moisture absorption and breathability prepared in Example 1 to obtain a finished product of a soft and elastic six-layer sandwich fabric with moisture absorption, breathability and smooth wrapping feeling;

[0126] Among them, the dyeing process is as follows:

[0127] Unwind and relax the fabric, flat ultrasonic water washing, pre-setting, dyeing, dehydration, drying, setting, finished product;

[0128] Dyeing is divided into 2 steps. First, disperse dyes are used for dyeing (the specific process is as Figure 3 ), and then reactive dyes are used for dyeing (the specific process is as Figure 4 );

[0129] The temperature for pre-setting is 180 °C, the machine speed is 25 m / min, and the machine frame has 10 sections; the air volume (upper / lower) is 100%, the overfeed is 40%, and the dosage of the auxiliary degreasing agent is 2%;

[0130] The temperature for setting is 130 °C, the machine speed is 30 m / s, the machine frame is 86 inches, the air volume (upper / lower) is 80%, the overfeed is 12%, and the dosage of the auxiliary softening agent is 5%;

[0131] The hydrophilic softening agent and the moisture absorption and sweat discharge auxiliary agent are added during dyeing and final setting of the finished product; the anti-phenol yellowing auxiliary agent is added during final setting of the finished product.

[0132] The obtained finished flexible elastic sandwich fabric with both moisture absorption, air permeability, and smooth wrapping is subjected to performance testing, and the test results are as follows:

[0133] Table 1

[0134] Performance Test Results Pilling Performance Grade 3 - 4 Pilling Performance after 2000 Rubs Grade 3 - 4 Snagging Performance Longitudinal: Grade 3 - 4, Transverse: Grade 4 Tensile Elastic Elongation Rate (%) Longitudinal: 38.0, Transverse: 83.0 Tensile Elastic Recovery Rate (%) Test Longitudinal: 85.1, Transverse: 81.6 <![CDATA[Water vapor permeability ((g / (m 2 ·24 h))]]> <![CDATA[1.01×10 4 > Air Permeability (mm / s) 636 (Coefficient of Variation: 2.4%) Wrinkle Resistance Performance (Grade) Grade 4 <![CDATA[Cool touch coefficient (J / (cm 2 ·S)]]> 0.21 (Average of 5 Groups) Abrasion Resistance (10,000 Revolutions) (Times) (Front) ＞10000 Half - life of Static Voltage Static Voltage (kV) 0.76, Half - life of Static Voltage (s) 0.052, Excellent Antistatic Performance Washing Performance (Dimensional Change) No Abnormal Change in the Sample after Washing Washing Dimensional Change Rate (%) Longitudinal: - 1.1, Transverse: - 0.3 (- indicates shrinkage, + indicates elongation) Appearance Flatness after Washing and Drying (Grade) 4 。

[0135] Comparative Example 1:

[0136] The surface needs to be skin-friendly and delicate to improve the fabric touch; omitting the first yarn makes the hand feel not delicate;

[0137] The sub-surface layer uses spandex to improve the fabric's straight and crosswise elasticity, suitable for different products; omitting the second yarn reduces the fabric elasticity;

[0138] The re-surface layer uses polyester filament to improve the fabric's anti-pilling performance, improve the fabric's quick-drying performance, and increase the overall thickness of the fabric. Omitting the third yarn reduces the anti-pilling performance;

[0139] The sub-inner layer uses polyester filament to improve the fabric's anti-pilling performance, improve the fabric's quick-drying performance, and increase the overall thickness of the fabric. Omitting the fifth yarn reduces the anti-pilling performance;

[0140] The inner layer uses spandex to improve the fabric's straight and crosswise elasticity, suitable for different products; omitting the sixth yarn reduces the fabric elasticity.

[0141] Comparative Example 2:

[0142] The first yarn, the second yarn, and the third yarn all select 80 / 2 UQES / M modal compact spun yarns, which cannot be woven, and have insufficient anti-pilling and strength, with bottoming;

[0143] Both the fifth and sixth select semi-dull polyester filaments, and the fabric has insufficient elasticity.

[0144] Comparative Example 3:

[0145] The first yarn, the second yarn, and the third yarn are combined and woven, resulting in poor snag resistance of the fabric. Moreover, the fabric cannot form an air layer and thus cannot achieve good breathability.

[0146] The fifth and sixth paths are combined and woven, resulting in insufficient fabric thickness, lack of three-dimensionality, and even worse breathability.

[0147] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in this technology can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be defined by the claims.

Claims

1. A method for preparing a soft and elastic sandwich fabric with moisture absorption, breathability and flat wrapping, characterized in that, It includes the following steps: 60 - 80 English cotton count regenerated cellulose fiber is used as the first yarn, and full needle knitting is carried out to form a loop structure; 20 - 30D spandex yarn is used as the second yarn, and full needle knitting is carried out to form a loop structure; 50D / 36F, 50D / 48F or 30D / 24F semi-dull polyester filament is used as the third yarn, and full needle knitting is carried out to form a loop structure; 50D / 36F, 50D / 48F or 30D / 24F semi-dull polyester filament is used as the fourth yarn, and knitting with 1 stitch in 2 rows is carried out to form a tuck structure; 50D / 36F, 50D / 48F or 30D / 24F cross-section moisture-absorbing and moisture-excluding semi-dull polyester filament is used as the fifth yarn, and full needle knitting is carried out to form a loop structure; 20 - 30D spandex yarn is used as the sixth yarn, and full needle knitting is carried out to form a loop structure; 60 - 80 English cotton count regenerated cellulose fiber is used as the seventh yarn, and full needle knitting is carried out to form a loop structure; 20 - 30D spandex yarn is used as the eighth yarn, and full needle knitting is carried out to form a loop structure; 50D / 36F, 50D / 48F or 30D / 24F semi-dull polyester filament is used as the ninth yarn, and full needle knitting is carried out to form a loop structure; 50D / 36F, 50D / 48F or 30D / 24F semi-dull polyester filament is used as the tenth yarn, and knitting with 1 stitch in 2 rows is carried out to form a tuck structure, and it is a cross tuck with the fourth yarn; 50D / 36F, 50D / 48F or 30D / 24F cross-section moisture-absorbing and moisture-excluding semi-dull polyester filament is used as the eleventh yarn, and full needle knitting is carried out to form a loop structure; 20 - 30D spandex yarn is used as the twelfth yarn, and full needle knitting is carried out to form a loop structure; Twelve rows form a cycle. The first and seventh rows form the surface layer, the second and eighth rows form the sub-surface layer, the third and ninth rows form the re-sub-surface layer, the fourth and tenth rows form the hollow layer, the fifth and eleventh rows form the sub-lining layer, and the sixth and twelfth rows form the lining layer; Circular knitting is carried out to obtain a soft and elastic six-layer sandwich fabric with both moisture absorption, breathability and a smooth wrapping feeling.

2. The method according to claim 1, wherein The yarn length of the first and seventh yarns is 21 - 24mm, and the tension is 8 - 12cN; The yarn length of the second and eighth yarns is 10 - 12mm, and the tension is 4 - 6cN; The yarn length of the third and ninth yarns is 19 - 21mm, and the tension is 4 - 6cN; The yarn length of the fourth and tenth yarns is 19 - 21mm, and the tension is 14 - 16cN; The yarn length of the fifth and eleventh yarns is 21 - 23mm, and the tension is 4 - 6cN; The yarn length of the sixth and twelfth yarns is 10 - 12mm, and the tension is 8 - 12cN.

3. The soft and elastic six-layer sandwich fabric with moisture absorption, breathability and a smooth wrapping feeling prepared by the method according to claim 1 or 2.

4. A method for preparing a finished soft and elastic sandwich fabric with moisture absorption, air permeability and flat wrapping, characterized in that, It includes the following steps: The soft and elastic six-layer sandwich fabric with moisture absorption, breathability and a smooth wrapping feeling according to claim 3 is dyed to obtain a soft and elastic six-layer sandwich fabric with both moisture absorption, breathability and a smooth wrapping feeling.

5. The method according to claim 4, characterized in that, The dyeing process is as follows: Unrolling and relaxing the fabric, flat-width ultrasonic water washing, pre-setting, dyeing, dehydration, drying, setting, finished product.

6. The method according to claim 5, characterized in that The temperature for pre-setting is 180 - 190 °C, the machine speed is 10 - 30 m / min, the number of machine frames is 8 - 12; the air volume is 100%, the overfeed is 20 - 40%, and the dosage of the auxiliary degreasing agent is 1 - 3%.

7. The method according to claim 5, wherein The temperature for setting is 140 - 170 °C, the machine speed is 25 - 35 m / s, the machine frame is 86 inches, the air volume is 60 - 85%, the overfeed is 10 - 20%, and the dosage of the auxiliary softening agent is 4 - 6%.

8. A finished product of a soft and elastic six - layer sandwich fabric with moisture absorption, air permeability and smooth wrapping, prepared by the method according to any one of claims 4 - 7.

9. Application of the finished product of the soft and elastic six - layer sandwich fabric with moisture absorption, air permeability and smooth wrapping according to claim 8 in functional textiles.

10. A bed sheet for all seasons, characterized in that, The soft and elastic six - layer sandwich fabric with moisture absorption, air permeability and smooth wrapping according to claim 3 is adopted.

Images