Flax-cotton blended yarn and production method thereof

Abstract

The invention discloses flax and cotton blended yarn and a production method thereof, and belongs to the technical field of spinning. The flax and cotton blended yarn comprises flax fibers and cotton fibers, the mass ratio of the flax fibers is 15%-55%, and the mass ratio of the cotton fibers is 85%-45%. The performance indexes of the cotton fiber are as follows: the length is 29.5 to 29.8 mm, the breaking strength is 2.92 to 2.95 CN / dtex, and the micronaire value is 3.5 to 3.7. In addition, the invention further provides a production method of the flax and cotton blended yarn, and the flax and cotton blended yarn is obtained through the blowing procedure, the cotton carding procedure, the drawing procedure and the rotor spinning procedure in sequence. Wherein in the rotor spinning process, the speed of a spinning rotor is 50000-80000 rpm, and the speed of a carding roller is 9500-9800 rpm. The flax and cotton blended yarn provided by the invention is relatively good in strength.

Description

Technical Field

[0001] The invention relates to the technical field of textiles, and in particular to a flax-cotton blended yarn and a production method thereof. Background Art

[0002] Flax fiber is the earliest natural plant fiber used by humans. It has high strength, strong moisture absorption and fast heat dissipation. It can be used in the fields of medicine, hygiene, clothing, etc. Flax fiber is a cellulose fiber and a hydrophilic fiber with obvious antibacterial and antimicrobial effects.

[0003] In the prior art, blended fabrics made of flax and long-staple cotton fibers require complex processes to obtain blended fabrics with better strength. The difficulty of blending flax and short-staple cotton fibers is greater than that of blending flax and long-staple fibers. How to obtain blended yarns with better strength through flax and short-staple cotton fibers is a difficult problem in the prior art. Summary of the invention

[0004] The purpose of the present invention is to overcome the above technical deficiencies, provide a flax-cotton blended yarn and a production method thereof, and solve the technical problem of how to obtain a blended yarn with better strength through flax and short-staple cotton fibers in the prior art.

[0005] In order to achieve the above technical purpose, the technical solution of the present invention provides a linen-cotton blended yarn, comprising linen fibers and cotton fibers, wherein the mass proportion of the linen fibers is 15%-55%, and the mass proportion of the cotton fibers is 85%-45%; the performance indicators of the cotton fibers include: length 29.5-29.8mm, breaking strength 2.92-2.95CN / dtex, and micronaire value 3.5-3.7.

[0006] In any embodiment, the performance indicators of the flax fiber include: breaking strength 4.0-4.2 cN / dtex, breaking elongation 2.5-2.6%.

[0007] In any embodiment, the flax fiber is produced after pretreatment, and the pretreatment includes: spraying a pretreatment agent on the surface of the flax fiber for health preservation; the pretreatment agent includes a softener, a sesame oil agent and water; the softener is 3-4% of the weight of the flax fiber, the sesame oil agent is 2-3% of the weight of the flax fiber, and the water is 5-6% of the weight of the flax fiber.

[0008] In any embodiment, the regimen lasts for 22-24 hours.

[0009] In addition, the present invention also proposes a method for producing the above-mentioned flax and cotton blended yarn, which is produced through a cleaning process, a carding process, a drawing process and an air-spinning process in sequence; wherein in the air-spinning process, the spinning cup speed is 50000-80000rpm and the combing roller speed is 9500-9800rpm.

[0010] In any embodiment, in the air-spinning process, the air-spinning twist is 600-800 twists / m.

[0011] In any embodiment, in the air-spinning process, the rotor model is T640BD, the twisting head is K4-A twisting head, the combing roller is B-174-DN, and the white false twister is used.

[0012] In any embodiment, in the drawing process, the first drawing quantity is 21.19-21.24 g / 5m, the gauge is 14*22, and the number of drawing is 8; the second drawing quantity is 26.86-26.92 g / 5m, the gauge is 14*22, and the number of drawing is 8.

[0013] In any embodiment, in the carding process, the carding flat plate flower rate is 3%-4.5%, and the cotton drop rate is 7%-9.5%.

[0014] In any embodiment, in the carding process, the cylinder card clothing is AC2030, the doffer card clothing is AD4030, the flat card clothing is MCH52D, and the licker-in card clothing is AT5615*5611.

[0015] In any embodiment, in the cotton cleaning process, the cotton roll is 30.6-30.9 meters long, the dry weight of the cotton roll is 336-337 g / m3, and the wet weight of the cotton roll is 362-365 g / m3.

[0016] In any embodiment, in the cotton cleaning process, the rotation speed is 11.22-11.25 r / min, the beater speed is 400-410 r / min, and the cotton roll roller diameter is 225-230 mm.

[0017] Compared with the prior art, the beneficial effects of the present invention include: the flax-cotton blended yarn proposed in the present invention includes flax fiber and cotton fiber, the flax fiber mass accounts for 15%-55%, and the cotton fiber mass accounts for 85%-45%; the performance indicators of the cotton fiber include: length 29.5-29.8mm, breaking strength 2.92-2.95CN / dtex, micronaire value 3.5-3.7, and the flax-cotton blended yarn has good strength.

[0018] The present invention uses flax and cotton fibers as raw materials and sequentially undergoes the processes of cleaning, carding, drawing and air-spinning, and reasonably adjusts various process parameters to obtain air-spinning yarn with a count of 11-15. The obtained flax and cotton blended yarn has the characteristics of being comfortable, cool and breathable, and has the advantages of soft color matching, good drape and small shrinkage. DETAILED DESCRIPTION

[0019] The "range" disclosed in the present application is defined in the form of a lower limit and an upper limit, and a given range is defined by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundaries of the particular range. The range defined in this way can be inclusive or exclusive of the end values, and can be arbitrarily combined, that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 60 to 120 and 80 to 110 is listed for a particular parameter, it is understood that a range of 60 to 110 and 80 to 120 is also expected. In addition, if the minimum range values ​​1 and 2 are listed, and if the maximum range values ​​3, 4 and 5 are listed, the following ranges can all be expected: 1 to 3, 1 to 4, 1 to 5, 2 to 3, 2 to 4 and 2 to 5. In the present application, unless otherwise specified, the numerical range "a to b" represents an abbreviation of any real number combination between a and b, where a and b are both real numbers. For example, the numerical range "0-5" means that all real numbers between "0-5" are listed in this document, and "0-5" is just an abbreviation of these numerical combinations. In addition, when a parameter is expressed as an integer ≥ 2, it is equivalent to disclosing that the parameter is, for example, an integer of 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0020] If there is no special explanation, the "include" and "comprising" mentioned in this application are open-ended or closed-ended. For example, the "include" and "comprising" may mean that other components not listed may also be included or only the listed components may be included or only the listed components may be included.

[0021] If not specifically stated, in this application, the term "or" is inclusive. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, any of the following conditions satisfies the condition "A or B": A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0022] The present specific embodiment provides a flax-cotton blended yarn, comprising flax fibers and cotton fibers, wherein the mass of the flax fibers accounts for 15%-55%, and the mass of the cotton fibers accounts for 85%-45%; the performance indicators of the cotton fibers include: length 29.5-29.8 mm, breaking strength 2.92-2.95 CN / dtex, micronaire value 3.5-3.7; the performance indicators of the flax fibers include: breaking strength 4.0-4.2 cN / dtex, breaking elongation 2.5-2.6%; the performance indicators are the performance indicators of the flax fibers before pretreatment.

[0023] In some embodiments, the flax fiber is produced after pretreatment, and the pretreatment includes: spraying a pretreatment agent on the surface of the flax fiber and curing it for 22-24 hours; the pretreatment agent includes a softener, a sesame oil agent and water; the softener is 3-4% of the weight of the flax fiber, the sesame oil agent is 2-3% of the weight of the flax fiber, and the water is 5-6% of the weight of the flax fiber.

[0024] In addition, this specific embodiment also provides a method for producing a flax-cotton blended yarn, which is produced through a cotton cleaning process, a carding process, a drawing process and an air-spinning process in sequence;

[0025] In the cotton cleaning process, the cotton roll length is 30.6-30.9 meters, the dry weight of the cotton roll is 336-337 g / m, and the wet weight of the cotton roll is 362-365 g / m; the rotation speed is 11.22-11.25 r / min, the beater speed is 400-410 r / min, and the cotton roll roller diameter is 225-230 mm;

[0026] In the carding process, the cylinder card clothing is AC2030, the doffer card clothing is AD4030, the flat card clothing is MCH52D, and the licker-in card clothing is AT5615*5611; the carding flat flower rate is 3%-4.5%, and the cotton drop rate is 7%-9.5%;

[0027] In the drawing process, the first drawing quantity is 21.19-21.24g / 5m, the gauge is 14*22, and the number of drawing is 8; the second drawing quantity is 26.86-26.92g / 5m, the gauge is 14*22, and the number of drawing is 8;

[0028] In the air-spinning process, the rotor speed is 50000-80000rpm, the combing roller speed is 9500-9800rpm, the air-spinning twist is 600-800 twists / m, the rotor model is T640BD, the twisting head is K4-A twisting head, the combing roller uses B-174-DN, and the white false twister.

[0029] In the present invention, after the drawing process, the yarn is directly spun by air-spinning, the spinning rotor speed is 50000-80000rpm, the combing roller speed is 9500-9800rpm, and the mechanical drafting multiple is more than 100 times. The larger the drafting multiple, the heavier the drafting load. In addition, the higher the spinning rotor speed, the greater the centrifugal force can be generated, which is helpful to separate the fibers from the slivers and form the yarn.

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] In the present invention, reference is made to “some embodiments”, “this embodiment”, examples, etc., which describe a subset of all possible embodiments, but it can be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0032] If similar descriptions of "first / second" appear in the application documents, the following instructions are added. In the following description, the terms "first\second\third" are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It can be understood that "first\second\third" can be interchanged in a specific order or sequence where permitted, so that the embodiments described herein can be implemented in an order other than that described herein.

[0033] In this embodiment, the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, object A and / or object B may represent three situations: object A exists alone, object A and object B exist at the same time, and object B exists alone.

[0034] In the following embodiments, the performance indicators of the flax fiber include: the flax fiber is two coarse hemp, the count is 11, the breaking strength is 4.1 cN / dtex, the breaking elongation is 2.6%, and the regain is 12.73%; the performance indicators of the cotton fiber are: grade 3, length 29.5-29.8 mm, regain 7.0%, breaking strength 2.92-2.95 CN / dtex, and micronaire value 3.5-3.7.

[0035] The cotton fibers in the following embodiments are pretreated cotton fibers; the pretreatment includes: spraying a pretreatment agent on the surface of the flax fibers to maintain health; the pretreatment agent includes a softener, a sesame oil agent and water; the softener is 3% of the weight of the flax fibers, the sesame oil agent is 2% of the weight of the flax fibers, and the water is 5% of the weight of the flax fibers. The softener is a mixture of grease, amino silicone oil, etc., and the sesame oil agent is a mixture of hydrocarbon distillate oils, all of which are from the prior art.

[0036] The equipment used in the production line includes: A002C automatic cotton plucking machine, A036B porcupine cotton opener, A092A double cotton box cotton feeder, A076C lap forming machine, A186 carding machine, FA317 / D81 drawing frame, and Schlafhorst A9 air-end spinning machine.

[0037] Example 1

[0038] This embodiment provides a flax-cotton blended yarn, comprising: 15% flax fiber and 85% cotton fiber, wherein the performance indicators of the flax fiber include: count 11, breaking strength 4.1 cN / dtex, breaking elongation 2.6%, and moisture regain 12.73%;

[0039] The performance indicators of the cotton fiber include: length 29.5 mm, strength above 29.2 CN / tex, and micronaire value 3.6.

[0040] The flax-cotton blended yarn of the present embodiment is produced by the following steps:

[0041] (1) Cleaning process

[0042] The lap roller speed is 11.22r / min, the A036C beater speed is 400r / min, the lap roller diameter is 230mm, the lap length is 30.6m, the lap dry weight is 336g / m, and the lap wet weight is 362g / m;

[0043] (2) Carding process

[0044] The carding was produced on an A186 carding machine. The dry weight of the flax-cotton blended carding was 15g / 5m, the doffer speed was 24 rpm, the 5-point gauge between the cylinder and the flat was 10×9×8×8×9, the gauge between the licker-in and the small leak bottom was 6*0.5*2mm, the cylinder wire was AC2030, the doffer wire was AD4030, the flat wire was MCH52D, and the licker-in wire was AT5615*5611. The flat wire flower rate of the carding was 3.05%, and the cotton drop rate was 7.24%.

[0045] (3) Drawing process

[0046] The draw frames are produced on D81L and TM13 draw frames, with the first draw weight of 21.19g / 5m, the gauge of 14*22, and the number of draws of 8; the second draw weight of 26.86g / 5m, the gauge of 14*22, and the number of draws of 8. A self-adjusting leveler draw frame is used, and the leveling detection point is 7.

[0047] (4) Air-spinning process

[0048] The air-spinning is produced on the Schlafhorst Autocoro9 fully automatic air-spinning machine. The electric cleaning and breakage rate are controlled during the production process. The air-spinning twist is 600 twists / m, the spinning rotor speed is 80,000 rpm, the combing roller speed is 9,800 rpm, the spinning rotor is T640BD model, the twist disk is equipped with an A-40 model spinning rotor, and the twist head is K4-A twist head. The single yarn with a number of 53.7 tex and a count of 11 is produced. This single yarn is air-spun linen and cotton blended yarn.

[0049] Example 2

[0050] This embodiment provides a flax-cotton blended yarn, comprising 30% flax fiber and 70% cotton fiber, wherein the performance indicators of the flax fiber include: count 11, breaking strength 4.1 cN / dtex, breaking elongation 2.6%, and moisture regain 12.73%;

[0051] The performance indicators of the cotton fiber include: length 29.7 mm, strength 29.4 CN / tex, and micronaire value 3.5.

[0052] The flax-cotton blended yarn of the present embodiment is produced by the following steps:

[0053] (1) Cleaning process

[0054] The lap roller speed is 11.22r / min, the A036C beater speed is 400r / min, the lap roller diameter is 230mm, the lap length is 30.6m, the lap dry weight is 336g / m, and the lap wet weight is 362g / m;

[0055] (2) Carding process

[0056] The carding was produced on an A186 carding machine. The dry weight of the flax-cotton blended carding was 15g / 5m, the doffer speed was 24 rpm, the 5-point gauge between the cylinder and the flat was 10×9×8×8×9, the gauge between the licker-in and the bottom was 6*0.5*2mm, the cylinder wire was AC2030, the doffer wire was AD4030, the flat wire was MCH52D, and the licker-in wire was AT5615*5611. The flat wire flower rate was 3.5%, and the cotton drop rate was 8.3%.

[0057] (3) Drawing process

[0058] The draw frames are produced on D81L and TM13 draw frames, with the first draw weight of 21.19g / 5m, the gauge of 14*22, and the number of draws of 8; the second draw weight of 26.86g / 5m, the gauge of 14*22, and the number of draws of 8. A self-adjusting leveler draw frame is used, and the leveling detection point is 7.

[0059] (4) Air-spinning process

[0060] The air-spinning is produced on the Schlafhorst Autocoro9 fully automatic air-spinning machine. During the production process, the electric cleaning and breakage rate are controlled. The air-spinning twist is 650 twists / m, the spinning rotor speed is 75000rpm, the combing roller speed is 9700rpm, the spinning rotor is T640BD model, the twist disk is equipped with an A-40 model spinning rotor, and the twist head is K4-A twist head. The single yarn with a number of 53.7tex and a count of 11 is produced. This single yarn is air-spun linen and cotton blended yarn.

[0061] Example 3

[0062] This embodiment provides a flax-cotton blended yarn, comprising: 45% flax fiber and 55% cotton fiber blended, the performance indicators of the flax fiber include: count 11, breaking strength 4.1 cN / dtex, breaking elongation 2.6%, moisture regain 12.73%;

[0063] The performance indicators of the cotton fiber include: length 29.8 mm, strength 29.5 CN / tex, and micronaire value 3.5.

[0064] The flax-cotton blended yarn proposed in this embodiment is produced by the following steps:

[0065] (1) Cleaning process

[0066] The lap roller speed is 11.22r / min, the A036C beater speed is 400r / min, the lap roller diameter is 230mm, the lap length is 30.6m, the lap dry weight is 336g / m, and the lap wet weight is 362g / m;

[0067] (2) Carding process

[0068] The carding was produced on an A186 carding machine. The dry weight of the flax-cotton blended carding was 15g / 5m, the doffer speed was 24 rpm, the 5-point gauge between the cylinder and the flat was 10×9×8×8×9, the gauge between the licker-in and the small leak bottom was 6*0.5*2mm, the cylinder wire was AC2030, the doffer wire was AD4030, the flat wire was MCH52D, and the licker-in wire was AT5615*5611. The flat wire flower rate of the carding was 4.1%, and the cotton drop rate was 9.2%.

[0069] (3) Drawing process

[0070] The draw frames are produced on D81L and TM13 draw frames, with the first draw weight of 21.19g / 5m, the gauge of 14*22, and the number of draws of 8; the second draw weight of 26.86g / 5m, the gauge of 14*22, and the number of draws of 8. A self-adjusting leveler draw frame is used, and the leveling detection point is 7.

[0071] (4) Air-spinning process

[0072] The air-spinning is produced on the Schlafhorst Autocoro9 fully automatic air-spinning machine. During the production process, the electric cleaning defect and the broken end rate are controlled. The air-spinning twist is 800 twists / m, the spinning rotor speed is 50000rpm, the combing roller speed is 9500rpm, the spinning rotor is T640BD model, the twist disk is equipped with an A-40 model spinning rotor, and the twist head is K4-A twist head. The single yarn with a number of 39.4tex and a count of 15 is produced. This single yarn is air-spun linen and cotton blended yarn.

[0073] Performance Testing

[0074] The relevant properties of the hemp blended yarn produced in Example 1 were tested according to conventional methods or national standards in the textile field. The test results are shown in Table 1.

[0075] Table 1 Performance test results of linen-cotton blended yarn produced in Examples 1-3

[0076]

[0077]

[0078] From the data in Table 1 above, it can be seen that the flax-cotton blended yarns obtained in Examples 1-3 have good evenness, neps and strength. Therefore, the method provided by the present invention can obtain flax-cotton blended yarns with good quality, and the tex number of the flax-cotton blended yarns is 39.4-53.7 tex.

[0079] Meanwhile, the flax-cotton blended yarn produced by the present invention has the characteristics of comfort, coolness and breathability, and has the advantages of soft color matching, good drape and small shrinkage, and can be used for clothing fabrics, furniture products and the like.

[0080] Compared with the prior art, the present invention has the following beneficial effects:

[0081] The invention uses flax and other fibers as raw materials and sequentially undergoes the processes of cleaning, carding, drawing and air-spinning, and reasonably adjusts various process parameters to obtain air-spinning yarn with a count of 11-15, so that the clothing has very good comfort, coolness and air permeability.

[0082] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A linen-cotton blended yarn, characterized in that: It comprises flax fiber and cotton fiber, wherein the mass proportion of the flax fiber is 15%-55%, and the mass proportion of the cotton fiber is 85%-45%; the performance indicators of the cotton fiber include: length 29.5-29.8mm, breaking strength 2.92-2.95CN / dtex, and micronaire value 3.5-3.

7.

2. The flax-cotton blended yarn according to claim 1, characterized in that: The performance indicators of the flax fiber include: breaking strength 4.0-4.2 cN / dtex, breaking elongation 2.5-2.6%.

3. The flax-cotton blended yarn according to claim 1, characterized in that: The flax fiber is produced after pretreatment, and the pretreatment includes: spraying a pretreatment agent on the surface of the flax fiber to maintain health; the pretreatment agent includes a softener, a sesame oil agent and water; the softener is 3-4% of the weight of the flax fiber, the sesame oil agent is 2-3% of the weight of the flax fiber, and the water is 5-6% of the weight of the flax fiber.

4. The flax-cotton blended yarn according to claim 3, characterized in that: The time of health preservation is 22-24 hours.

5. A method for producing a flax-cotton blended yarn according to any one of claims 1 to 4, characterized in that: The cotton is prepared by sequentially going through the processes of cotton cleaning, carding, drawing and air-spinning; wherein in the air-spinning process, the spinning cup speed is 50000-80000 rpm, and the combing roller speed is 9500-9800 rpm.

6. The method for producing flax-cotton blended yarn according to claim 5, characterized in that: In the air-spinning process, the air-spinning twist is 600-800 twists / m; and / or, in the air-spinning process, the spinning rotor model is T640BD, the twisting head is K4-A twisting head, the carding roller uses B-174-DN, and the white false twister.

7. The method for producing flax-cotton blended yarn according to claim 5, characterized in that: In the drawing process, the first drawing quantity is 21.19-21.24g / 5m, the gauge is 14*22, and the number of drawing is 8; the second drawing quantity is 26.86-26.92g / 5m, the gauge is 14*22, and the number of drawing is 8.

8. The method for producing flax-cotton blended yarn according to claim 5, characterized in that: In the carding process, the carding flat plate flower rate is 3%-4.5%, and the cotton drop rate is 7%-9.5%.

9. The method for producing flax-cotton blended yarn according to claim 8, characterized in that: In the carding process, the cylinder card clothing is AC2030, the doffer card clothing is AD4030, the flat plate card clothing is MCH52D, and the licker-in roller card clothing is AT5615*5611.

10. The method for producing flax-cotton blended yarn according to claim 5, characterized in that: In the cotton cleaning process, the cotton roll length is 30.6-30.9 meters, the cotton roll dry weight is 336-337 g / m, and the cotton roll wet weight is 362-365 g / m; and / or, in the cotton cleaning process, the rotation speed is 11.22-11.25 r / min, the beater speed is 400-410 r / min, and the cotton roll roller diameter is 225-230 mm.

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