Preparation method of double-layer gauze bedding fabric

Abstract

The invention relates to the field of spinning. The preparation method of the double-layer gauze bedding fabric comprises the following steps: step 1, yarn preparation: a first kind of yarn is high-strength all-cotton yarn, and a second kind of yarn is vinylon filament yarn or doubled yarn of the high-strength all-cotton yarn and the vinylon filament yarn; step 2, fabric weaving: the warp yarns of the surface layer and the inner layer are first yarns, and the weft yarns of the surface layer and the inner layer are woven by the first yarns and the second yarns at intervals; 3, fabric dyeing and finishing, wherein the fabric dyeing and finishing procedure comprises pretreatment, vinylon dissolution, dyeing, shaping finishing and preshrinking. The prepared fabric keeps the good air permeability of the double-layer gauze, and meanwhile, the strength, the hand feeling and the fuzzing and pilling performance of the fabric can be considered.

Description

Technical Field

[0001] The invention relates to the field of textiles, in particular to double-layer gauze. Background Art

[0002] Conventional double-layer gauze is more commonly used in baby sweat towels, diapers, and some home wear products because of its loose structure, soft texture, many pores, and good air permeability. Double-layer gauze is commonly woven with two layers of cotton yarn, and the warp and weft density are relatively sparse, so the fabric strength is relatively poor, the wear resistance and stability are not very good, and it is more prone to pilling and snagging. Due to the above problems of double-layer gauze, it is relatively less used in bedding. In addition, due to the large width of bedding fabrics, weaving and dyeing are more prone to various problems, and the overall machine quality rate is not high, which limits the use of double-layer gauze.

[0003] CN217532144U discloses a cool, antibacterial, and hygroscopic gauze, wherein the surface fabric and the inner fabric are both plain weave structures, the inner warp yarn is ramie yarn, the weft yarn is cotton yarn, the surface warp yarn and the weft yarn are both viscose yarn and cotton yarn, the surface fabric and the inner fabric are connected by the inner warp connection method, and the inner warp ramie yarn and the outer weft cotton yarn form a connection point. The inner ramie fiber of the gauze prepared by the method is relatively rough, it will feel itchy, and the skin-friendly property is not good, and the outer layer is mainly viscose yarn, which is easy to pilling and has poor strength.

[0004] CN203373493U discloses a double-layer gauze structure fabric bedding, the bedding fabric includes a surface gauze layer and an inner gauze layer, the surface layer and the inner layer are connected by a splicing or layer-changing method, and the surface layer and the inner layer use high-count yarns or high-count warp yarns and 30-40-count weft yarns. This method either uses all high-count yarns, which affects the strength of the gauze; or the thickness of the warp yarns and weft yarns of the surface and inner layers is very different, which will cause the fabric surface to have obvious bumps and concavities, affecting the skin-friendliness of the fabric.

[0005] CN211284743U discloses a pure cotton unidirectional moisture-conducting double-layer gauze, wherein the yarn density of the bottom layer is greater than that of the surface layer, the shape between each connection point of the connecting layer is a rhombus or square, the bottom layer yarn adopts high twist yarn with relatively low density, and the surface layer and connecting yarn adopt relatively low twist yarn. Since the inner layer yarn has a high twist, the yarn feels hard, and the fabric has poor skin affinity and hand feel. Summary of the invention

[0006] The object of the present invention is to provide a method for preparing a double-layer gauze bedding fabric to solve the above problems.

[0007] A method for preparing a double-layer gauze bedding fabric, characterized in that it comprises the following steps:

[0008] Step 1, yarn preparation: including a first yarn and a second yarn, wherein the first yarn is a high-strength cotton yarn, and the second yarn is a vinyl filament or a double yarn of high-strength cotton yarn and vinyl filament;

[0009] Step 2, fabric weaving: including a surface layer and an inner layer, the warp yarns of the surface layer and the inner layer are both the first yarn, the weft yarns of the surface layer and the inner layer are both the first yarn and the second yarn, woven one by one, the surface layer and the inner layer are connected by the warp yarns of the inner layer and the weft yarns of the surface layer or by the warp yarns of the surface layer and the weft yarns of the inner layer, the weft yarns involved in the connection are the first yarns, the intervals between adjacent connection points are between 0.5-1.5 cm, and the number of interval yarns is an odd number;

[0010] Step 3: Fabric dyeing and finishing: The fabric dyeing and finishing process includes pre-treatment, de-fiberization, dyeing, shaping and pre-shrinking.

[0011] Preferably, the high-strength cotton yarn is a 40S-60S cotton compact siro-spun single yarn or a 40S-80S cotton compact siro-spun yarn processed by double yarn plying, and the cotton fiber length used in the high-strength cotton yarn is greater than or equal to 36 mm, and the micronaire value is between 3.7 and 4.5.

[0012] Preferably, the fineness of the vinylon filament is 50D-150D.

[0013] Preferably, the structural density of the surface layer and the inner layer are: warp density 60-90 strands / inch, weft density 100-150 strands / inch.

[0014] Preferably, the pretreatment adopts the desizing enzyme and scouring enzyme compound same bath immersion method, the specific process is: desizing enzyme concentration 1.5-2.5g / L, scouring enzyme concentration 1-3g / L, penetrant JFC dosage 2-3g / L, magnesium chloride dosage 4-5g / L, treatment solution pH value 7, treatment temperature 65-75°C, treatment time 45-55min, bath ratio 50:1, after treatment, wash twice with 90°C hot water, then wash with 50-60°C water, and finally wash thoroughly with cold water.

[0015] Preferably, during shaping and finishing, the machine speed is 40-50 m / min, the softener is 15-25 g / L, the temperature is 140-150°C, and the overfeed is 2%-4%; during pre-shrinking, the overfeed is 5%-15%, the pre-shrinking temperature is 110-125°C, and the machine speed is 30-40 m / min.

[0016] Preferably, the rayon removal process adopts piece washing to dissolve all the vinylon. After the pre-treated grey cloth enters the washing box, the vinylon is dissolved in water by water impact at a temperature of 90-100°C for 15-20 minutes, and then the aqueous solution is discharged. This process is repeated 2-3 times to ensure that the vinylon can be completely dissolved.

[0017] Preferably, the dyeing adopts active open-width pad dyeing, and after padding the dye solution, it is pre-dried, rolled with alkali agent, steamed, washed, soaped, washed and dried, the dye solution padding rate is 60-70%, the dispersing chelating agent is 0.5-2g / L, the penetrant is 2-3g / L, the salt is 120-160g / L, the soda ash is 15-25g / L, the steaming time is 50-60S, and the steaming temperature is 115-125°C.

[0018] Beneficial effects:

[0019] The fabric prepared by the method of the present invention can maintain the good air permeability of the double-layer gauze itself while taking into account the strength, hand feel and pilling performance of the fabric, and can well expand the application scope and category of the double-layer gauze.

[0020] The final composition of the fabric prepared by the method of the present invention is 100% cotton, it feels soft and comfortable, and its strength, pilling and shrinkage all meet the index requirements of the national standard GB / T 22796-2021 "Bedding". At the same time, the fabric maintains more pores and has good moisture permeability and air permeability, and can be used as quilt core fabric and set fabric. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below.

[0022] A method for preparing a double-layer gauze bedding fabric comprises the following steps:

[0023] Step 1, yarn preparation: Two types of yarn are required for the preparation of fabrics. The first type of yarn is high-strength cotton yarn, preferably 40S-60S cotton compact siro-spun single yarn or 40S-80S cotton compact siro-spun yarn for double yarn plying. The cotton fiber length used in the high-strength cotton yarn is required to be greater than or equal to 36mm, and the micronaire value is between 3.7 and 4.5. The second type of yarn is vinylon filament or the parallel yarn of the above-mentioned high-strength cotton yarn and vinylon filament, the vinylon filament fineness is 50D-150D, and the high-strength cotton yarn is 40S-80S.

[0024] Step 2, fabric weaving: fabric weaving involves two layers, the upper and lower layers, and both the surface warp yarn and the inner warp yarn are made of the above-mentioned high-strength cotton yarn. The surface weft yarn and the inner weft yarn are woven one by one with the above-mentioned high-strength cotton yarn and the above-mentioned vinylon filament or the above-mentioned high-strength cotton yarn and vinylon filament. The weaving adopts air-jet loom, and the surface layer tissue and the inner layer tissue are both plain weave structures. The upper and lower layers are connected by the inner warp and the surface weft or the surface warp and the inner weft. The weft yarn involved in the connection must be high-strength cotton yarn, avoiding vinylon filaments. The interval between adjacent junction points is controlled between 0.5-1.5cm, and the number of interval yarns is an odd number. The structural density of the surface and inner layers is: warp density 60-90 strands / inch, weft density 100-150 strands / inch.

[0025] Step 3, fabric dyeing and finishing: The fabric dyeing and finishing process includes pretreatment, fiber removal, dyeing, shaping and preshrinking. The pretreatment adopts the same bath immersion method of desizing enzyme and scouring enzyme compound. The specific process is: desizing enzyme concentration 1.5-2.5g / L, scouring enzyme concentration 1-3g / L, penetrant JFC dosage 2-3g / L, magnesium chloride dosage 4-5g / L, treatment liquid pH value 7, treatment temperature 65-75℃, treatment time 45-55min, bath ratio 50:1. After treatment, wash twice with 90℃ hot water, then wash with 50-60℃ water, and finally wash with cold water. The fiber removal process adopts the piece washing method to dissolve all the vinylon. After the pre-treated grey cloth enters the washing box, the vinylon is dissolved in water by water flow impact, the temperature is 90-100℃, the time is 15-20min, and then the aqueous solution is discharged. Repeat this process 2-3 times to ensure that the vinylon can be completely dissolved. Dyeing adopts active open-width pad dyeing, and after padding the dye solution, it is pre-dried, padded with alkali agent, steamed, washed, soaped, washed and dried. The dye solution padding rate is 60-70%, dispersing chelating agent is 0.5-2g / L, penetrant is 2-3g / L, salt is 120-160g / L, and soda ash is 15-25g / L. Steaming time is 50-60S, and steaming temperature is 115-125℃. The shaping and finishing speed is 40-50m / min, the softener is 15-25g / L, the temperature is 140-150℃, and the overfeed is 2%-4%. Pre-shrinking overfeed is 5%-15%, the pre-shrinking temperature of rubber blanket is 120-125℃, the pre-shrinking drying of wool blanket is 110-120℃, and the speed is 30-40m / min.

[0026] Example 1

[0027] Cotton fibers with a length of 36 mm or more and a micronaire value between 3.7 and 4.5 are used to spin 40S siro-compact yarns as the warp yarns of the outer and inner layers and half of the weft yarns of the outer and inner layers. The other half of the weft yarns of the outer and inner layers are made of 100D vinylon filaments. The two weft yarns of the outer and inner layers are woven alternately. The upper and lower layers are connected by the inner warp and the 40S cotton siro-compact surface weft yarn. The interval between adjacent junctions is 1 cm, and the radial density of the outer and inner layers is 70 strands / inch, and the weft density is 120 strands / inch.

[0028] Grey cloth pretreatment process: desizing enzyme concentration 1.5g / L, scouring enzyme concentration 2.0g / L, penetrant JFC dosage 3.0g / L, magnesium chloride dosage 5g / L, treatment solution pH value 7, treatment temperature 70℃, treatment time 50min, bath ratio 50:1. After treatment, wash twice with 90℃ hot water, then wash with 50-60℃ water, and finally wash thoroughly with cold water.

[0029] Vinylon removal process: The grey cloth after pre-treatment enters the washing box at 100℃ for 15 minutes, and then the aqueous solution is discharged. This process is repeated 3 times to ensure that the vinylon can be completely dissolved.

[0030] Dyeing process: pre-drying, padding with alkali agent, steaming, washing, soaping, washing and drying after padding with dye solution. The padding rate of dye solution is 70%, dispersing chelating agent is 1.0g / L, penetrant is 2.0g / L, salt is 150g / L, and soda ash is 20g / L. Steaming time is 60S, and steaming temperature is 120℃.

[0031] The speed of the shaping and finishing machine is 40 m / min, the softener is 20 g / L, the temperature is 150°C, and the overfeed is 3%. The pre-shrinkage overfeed is 10%, the pre-shrinkage temperature of the rubber blanket is 120°C, the pre-shrinkage drying temperature of the wool blanket is 120°C, and the speed is 40 m / min.

[0032] After testing, the double-layer gauze fabric prepared in Example 1 has a breaking strength of 380N in the radial direction and 320N in the weft direction according to the standard GB / T 24218.3; the pilling result of the Martindale method 2000r in the standard GB / T 4802.2 is 3-4; the dimensional change rate of the fabric after washing according to the GB / T8628-2017 test is -2.5% in the radial direction and -2.1% in the weft direction. In addition, the air permeability of the fabric is measured to be 1579.6mm / s (GB / T 5453-1997), and the moisture permeability of the fabric is 3630g / (m 2 ·24h)(GB / T 12704.2-2009 positive cup method), with good moisture permeability and air permeability.

[0033] Example 2

[0034] Cotton fibers with a length of 36 mm or more and a micronaire value between 3.7 and 4.5 are used to spin 80S siro-compact yarns and double yarns as the warp yarns of the outer and inner layers and half of the weft yarns of the outer and inner layers. The other half of the weft yarns of the outer and inner layers are made of 80S cotton siro-compact yarns and 50D vinylon filament yarns. The two weft yarns of the outer and inner layers are woven alternately. The upper and lower layers are connected by the inner warp and the surface weft yarns of 80S cotton siro-compact yarns. The interval between adjacent junctions is 1.5 cm, and the radial density of the outer and inner layers is 80 strands / inch, and the weft density is 100 strands / inch.

[0035] Grey cloth pretreatment process: desizing enzyme concentration 2.0g / L, scouring enzyme concentration 2.5g / L, penetrant JFC dosage 2.5g / L, magnesium chloride dosage 4.5g / L, treatment solution pH value 7, treatment temperature 75℃, treatment time 45min, bath ratio 50:1. After treatment, wash twice with 90℃ hot water, then wash with 50-60℃ water, and finally wash thoroughly with cold water.

[0036] Vinylon removal process: The grey cloth after pre-treatment enters the washing box at 95℃ for 20 minutes, and then the aqueous solution is discharged. This process is repeated twice to ensure that the vinylon can be completely dissolved.

[0037] Dyeing process: After padding the dye solution, it is pre-baked, rolled with alkali agent, steamed, washed, soaped, washed and dried. The dye solution rolling rate is 65%, dispersing chelating agent is 1.5g / L, penetrant is 2.5g / L, salt is 130g / L, and soda ash is 18g / L. Steaming time is 55S, and steaming temperature is 118℃.

[0038] The speed of the shaping and finishing machine is 45m / min, the softener is 15g / L, the temperature is 145℃, and the overfeed is 2%. The pre-shrinkage overfeed is 12%, the pre-shrinkage temperature of the rubber blanket is 125℃, the pre-shrinkage drying temperature of the wool blanket is 115℃, and the speed is 35m / min.

[0039] After testing, the double-layer gauze fabric prepared in Example 2 has a breaking strength of 350N in the radial direction and 290N in the weft direction according to the standard GB / T 24218.3; the pilling result of the Martindale method 2000r in the standard GB / T 4802.2 is 3-4; the dimensional change rate of the fabric after washing according to the GB / T8628-2017 test is -2.7% in the radial direction and -1.8% in the weft direction. In addition, the air permeability of the fabric is measured to be 1425.8mm / s (GB / T 5453-1997), and the moisture permeability of the fabric is 3750g / (m 2 ·24h)(GB / T 12704.2-2009 positive cup method), with good moisture permeability and air permeability.

[0040] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A method for preparing a double-layer gauze bedding fabric, It is characterized in that The steps include: Step 1, yarn preparation: including a first yarn and a second yarn, wherein the first yarn is a high-strength cotton yarn, and the second yarn is a vinyl filament or a double yarn of high-strength cotton yarn and vinyl filament; Step 2, fabric weaving: including a surface layer and an inner layer, the warp yarns of the surface layer and the inner layer are both the first yarn, the weft yarns of the surface layer and the inner layer are both the first yarn and the second yarn, woven one by one, the surface layer and the inner layer are connected by the warp yarns of the inner layer and the weft yarns of the surface layer or by the warp yarns of the surface layer and the weft yarns of the inner layer, the weft yarns involved in the connection are the first yarns, the intervals between adjacent connection points are between 0.5-1.5 cm, and the number of interval yarns is an odd number; Step 3: Fabric dyeing and finishing: The fabric dyeing and finishing process includes pre-treatment, de-fiberization, dyeing, shaping and pre-shrinking.

2. The method for preparing the double-layer gauze bedding fabric according to claim 1, It is characterized in that The high-strength cotton yarn is a 40S-60S cotton compact siro-spun single yarn or a 40S-80S cotton compact siro-spun yarn processed by double yarn plying. The cotton fiber length used in the high-strength cotton yarn is greater than or equal to 36mm, and the micronaire value is between 3.7 and 4.

5.

3. The method for preparing the double-layer gauze bedding fabric according to claim 1, It is characterized in that The fineness of vinylon filament is 50D-150D.

4. The method for preparing the double-layer gauze bedding fabric according to claim 1, It is characterized in that The structural density of the surface layer and the inner layer are: warp density 60-90 strands / inch, weft density 100-150 strands / inch.

5. The method for preparing the double-layer gauze bedding fabric according to claim 1, It is characterized in that The pretreatment adopts the same-bath immersion method of desizing enzyme and scouring enzyme compound. The specific process is: desizing enzyme concentration 1.5-2.5g / L, scouring enzyme concentration 1-3g / L, penetrant JFC dosage 2-3g / L, magnesium chloride dosage 4-5g / L, treatment solution pH value 7, treatment temperature 65-75℃, treatment time 45-55min, bath ratio 50:1, after treatment, wash twice with 90℃ hot water, then wash with 50-60℃ water, and finally wash thoroughly with cold water.

6. The method for preparing the double-layer gauze bedding fabric according to claim 1, It is characterized in that During shaping and finishing, the machine speed is 40-50 m / min, the softener is 15-25 g / L, the temperature is 140-150°C, and the overfeed is 2%-4%; during pre-shrinking, the overfeed is 5%-15%, the pre-shrinking temperature is 110-125°C, and the machine speed is 30-40 m / min.

7. The method for preparing the double-layer gauze bedding fabric according to claim 1, It is characterized in that The de-vinyling process adopts piece-washing to dissolve all the vinylon. After the pre-treated grey cloth enters the washing box, the vinylon is dissolved in water by water impact at a temperature of 90-100°C for 15-20 minutes, and then the aqueous solution is discharged. This process is repeated 2-3 times to ensure that the vinylon can be completely dissolved.

8. The method for preparing the double-layer gauze bedding fabric according to claim 1, It is characterized in that The dyeing adopts active open-width pad dyeing. After padding the dye solution, it is pre-dried, rolled with alkali agent, steamed, washed, soaped, washed and dried. The dye solution padding rate is 60-70%, the dispersing chelating agent is 0.5-2g / L, the penetrant is 2-3g / L, the salt is 120-160g / L, the soda ash is 15-25g / L, the steaming time is 50-60S, and the steaming temperature is 115-125℃.

9. The method for preparing the double-layer gauze bedding fabric according to claim 1, It is characterized in that Cotton fibers with a length of 36 mm or more and a micronaire value between 3.7 and 4.5 are used to spin 40S siro-compact yarns as the surface warp yarn, the inner warp yarn and half of the surface and inner weft yarns. The other half of the surface and inner weft yarns are 100D vinylon filaments. The two weft yarns of the surface and inner layers are woven alternately. The surface and inner layers are connected by the inner warp yarn and the 40S pure cotton siro-compact surface weft yarn. The interval between adjacent junction points is 1 cm. The radial density of the surface and inner layers is 70 strands / inch, and the weft density is 120 strands / inch. Grey cloth pretreatment process: desizing enzyme concentration 1.5g / L, scouring enzyme concentration 2.0g / L, penetrant JFC dosage 3.0g / L, magnesium chloride dosage 5g / L, treatment solution pH value 7, treatment temperature 70℃, treatment time 50min, bath ratio 50:1, after treatment, wash twice with 90℃ hot water, then wash with 50-60℃ water, and finally wash thoroughly with cold water; Vinylon removal process: The pre-treated grey cloth enters the washing box at 100°C for 15 minutes, and then the aqueous solution is discharged. This process is repeated 3 times to ensure that the vinylon can be completely dissolved. Dyeing process: after padding the dye solution, it is pre-baked, rolled with alkali agent, steamed, washed, soaped, washed and dried. The dye solution rolling rate is 70%, the dispersing chelating agent is 1.0g / L, the penetrant is 2.0g / L, the salt is 150g / L, the soda ash is 20g / L, the steaming time is 60S, and the steaming temperature is 120℃. The speed of the shaping and finishing machine is 40 m / min, the softener is 20 g / L, the temperature is 150°C, the overfeed is 3%, the pre-shrinkage overfeed is 10%, the pre-shrinkage temperature of the rubber blanket is 120°C, the pre-shrinkage drying temperature of the wool blanket is 120°C, and the speed is 40 m / min.

10. The method for preparing the double-layer gauze bedding fabric according to claim 1, It is characterized in that Cotton fibers with a length of 36 mm or more and a micronaire value between 3.7 and 4.5 are selected to be spun into 80S siro-compact yarns and doubled as the surface warp yarns, the inner warp yarns and half of the surface and inner weft yarns. The other half of the surface and inner weft yarns are made of 80S pure cotton siro-compact yarns and 50D vinylon filament yarns; the two weft yarns of the surface and inner layers are woven alternately; the surface and inner layers are connected by the inner warp yarns and the surface weft yarns of 80S pure cotton siro-compact yarns, and the interval between adjacent junctions is 1.5 cm. The radial density of the surface and inner layers is 80 strands / inch, and the weft density is 100 strands / inch; Grey cloth pretreatment process: desizing enzyme concentration 2.0g / L, scouring enzyme concentration 2.5g / L, penetrant JFC dosage 2.5g / L, magnesium chloride dosage 4.5g / L, treatment solution pH value 7, treatment temperature 75℃, treatment time 45min, bath ratio 50:1, after treatment, wash twice with 90℃ hot water, then wash with 50-60℃ water, and finally wash thoroughly with cold water; Vinylon removal process: The pre-treated grey cloth enters the washing box at 95°C for 20 minutes, then the water solution is discharged, and the process is repeated twice to ensure that the vinylon can be completely dissolved; Dyeing process: after padding the dye solution, it is pre-baked, rolled with alkali agent, steamed, washed, soaped, washed and dried. The dye solution rolling rate is 65%, the dispersing chelating agent is 1.5g / L, the penetrant is 2.5g / L, the salt is 130g / L, the soda ash is 18g / L, the steaming time is 55S, and the steaming temperature is 118℃. The speed of the shaping and finishing machine is 45m / min, the softener is 15g / L, the temperature is 145℃, and the overfeed is 2%. The pre-shrinkage overfeed is 12%, the pre-shrinkage temperature of the rubber blanket is 125℃, the pre-shrinkage drying temperature of the wool blanket is 115℃, and the speed is 35m / min.