A kind of textile yarn containing banyan fiber and preparation method thereof

Abstract

The invention relates to a yarn containing ficus beard fiber and a preparation method thereof, comprising the steps of unbundling, pickling, scouring, beating and ramie spinning. Different from the prior art, the ficus beard fiber obtained by the above technical scheme has a production rate of 45-60% and a residual rubber rate of 1-3%; the ficus beard fiber is spinnable, and the yarn containing ficus beard fiber can be prepared by using a ramie spinning system, which makes full use of the components of the ficus beard fiber and is natural and environmentally friendly.

Description

Technical Field

[0001] The present application relates to the field of textiles, and in particular to a yarn containing banyan fiber and a preparation method thereof. Background Art

[0002] The main component of banyan whiskers is cellulose, which accounts for more than 60% of the total, and the rest is gum, including 30% pectin, 5%-6% hemicellulose, and 1.2%-2% lignin.

[0003] Since the bast tissue of the fig whiskers contains a lot of lignin and gum, the existing processing methods either have a high gum residue rate and cannot produce single fibers; or cause great damage to the fibers, resulting in a low yield. At the same time, since the fig whiskers are relatively coarse and hard, the fig whiskers are rarely used in the textile field. Summary of the invention

[0004] In view of the above problems, the present application provides a yarn containing ficus beard fiber and a preparation method thereof, which can effectively use ficus beard fiber to prepare a yarn containing ficus beard fiber. The ficus beard fiber yarn is then processed into ficus beard fiber fabric through weaving and knitting technology, and has broad market application prospects, mainly in household textile products, pharmacological effects, high-performance industrial materials, environmental governance and other aspects for high-value utilization and development.

[0005] In order to achieve the above object, the inventor provides a method for preparing a yarn containing banyan fiber, the preparation method comprising the following steps:

[0006] Debonding: Pressing and steam-exploding the bast of the fig whiskers to obtain the crude fiber of the bast of the fig whiskers;

[0007] Acid soaking: soaking the crude fiber of fig bast in a first acid solution containing 0.05-0.1% sulfuric acid and 0.05-0.1% hydrochloric acid for 2-20 hours, and then washing with water to obtain the crude fiber of fig bast after acid soaking;

[0008] Scouring: Scouring the acid-soaked crude fiber of fig bast with alkali solution, and then washing with water to obtain the scouring crude fiber of fig bast;

[0009] Beating: Beat the scouring bast crude fiber of banyan tree and wash it with high pressure water of 2-4MPa to obtain banyan tree fiber;

[0010] Ramie spinning: After the fig whisker fibers are dried, they are processed using the ramie spinning method to obtain yarn containing the fig whisker fibers.

[0011] Different from the existing technology, the above technical scheme adopts steam flash explosion debundling, pickling, double scouring, fiber beating and ramie spinning steps to prepare banyan fiber suitable for ramie spinning system. The production rate of banyan fiber reaches 45-60%, and the residual rubber rate is 1-3%. Banyan fiber is spinnable, and yarn containing banyan fiber can be prepared by ramie spinning system.

[0012] In order to achieve the above-mentioned purpose, the inventor also provides a yarn containing Ficus microcarpa fibers, and the yarn containing Ficus microcarpa fibers is prepared by any of the preparation methods described above.

[0013] The yarn of the above technical solution is mainly prepared from banyan fiber, which effectively removes cellulose and colloid, making the banyan fiber spinnable, making full use of the components of banyan fiber, and being natural and environmentally friendly. The development and utilization of banyan fiber can not only reduce pollution to the environment and increase the source of natural fibers, but also meet people's concept of health and environmental protection. Banyan fiber has some characteristics of cotton and linen fibers, such as reducing the use of chemicals, reducing fiber damage, and improving fiber spinnability during the preparation process, which will surely provide a broad development prospect for banyan fiber.

[0014] The above-mentioned records related to the invention content are only an overview of the technical solution of the present application. In order to enable ordinary technicians in the field to more clearly understand the technical solution of the present application, and then implement it according to the written contents of the specification, and to make the above-mentioned purpose and other purposes, features and advantages of the present application easier to understand, the specific implementation methods of the present application are explained below. DETAILED DESCRIPTION

[0015] In order to explain the technical content, structural features, achieved objectives and effects of the technical solution in detail, the following is a detailed description in conjunction with specific embodiments.

[0016] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description in conjunction with the specific embodiments listed. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0017] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0018] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0019] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0020] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0021] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0022] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0023] The inventor provides a method for preparing a yarn containing banyan fiber, the preparation method comprising the following steps:

[0024] Debonding: Pressing and steam-exploding the bast of the fig whiskers to obtain the crude fiber of the bast of the fig whiskers;

[0025] Acid soaking: soaking the crude fiber of fig bast in a first acid solution containing 0.05-0.1% sulfuric acid and 0.05-0.1% hydrochloric acid for 2-20 hours, and then washing with water to obtain the crude fiber of fig bast after acid soaking;

[0026] Scouring: Scouring the acid-soaked crude fiber of fig beard bast twice with alkali solution to obtain the scouring crude fiber of fig beard bast;

[0027] Beating: Beat the scouring bast crude fiber of banyan tree and wash it with high pressure water of 2-4MPa to remove the residual glue impurities on the fiber and make the fiber loose, so as to obtain banyan tree fiber;

[0028] Ramie spinning: After the fig whisker fibers are dried, they are processed using the ramie spinning method to obtain yarn containing the fig whisker fibers.

[0029] The linear density and other indicators of the banyan fiber prepared by the present technical solution are similar to those of ramie, and the spinnability of the fiber is similar to that of ramie, and the fiber can be processed using a ramie spinning system.

[0030] Different from the existing technology, the above technical scheme adopts steam flash explosion debundling, pickling, double scouring, fiber beating and ramie spinning steps to prepare banyan fiber suitable for ramie spinning system. The production rate of banyan fiber reaches 45-60%, and the residual rubber rate is 1-3%. Banyan fiber is spinnable, and yarn containing banyan fiber can be prepared by ramie spinning system.

[0031] In some embodiments, the preparation method further comprises a pickling step and an oiling step, wherein the pickling and oiling steps are arranged before the ramie spinning step;

[0032] The pickling step comprises: pickling the fig whisker fiber with a second acidic solution containing 0.01-0.05% sulfuric acid and 0.01-0.05% hydrochloric acid, then washing with water and dehydrating to obtain the pickled fig whisker fiber;

[0033] The oiling step comprises: bathing the pickled fig whisker fibers in amino silicone oil for a bathing time of 0.1-1 min, and the oil content of the fig whisker fibers after the bathing is 0.8-1.2%.

[0034] The pickling step can neutralize the alkali solution remaining on the banyan fiber and remove the colored substances adsorbed by the fiber.

[0035] During the oiling step, the fibers can pass through an amino silicone oil bath in an oiling tank. The oiling step can make the banyan fibers smooth and prevent them from getting tangled with each other.

[0036] In some embodiments, during the fiber beating step, the fig whisker fiber handles are struck by a wooden hammer or other machine parts of a fig whisker fiber striking machine and rinsed with high-pressure water at a pressure of 2-4 MPa to remove residual glue impurities on the fibers and loosen the fibers; the striking intensity of the fig whisker fiber striking machine decreases with an increase in the feed amount of the fig whisker bast fiber and with an increase in the number of times the fig whisker fiber is struck.

[0037] In some embodiments, the ramie spinning method includes the following steps: softening, opening, carding, combing, drawing, roving preparation, and spun yarn preparation.

[0038] The softening process uses a softening machine to process the banyan fiber to make it softer and looser, which is beneficial for the subsequent processing.

[0039] In some preferred embodiments, the feeding amount of the softening machine is set to 500-1000 g, the pressure of the empty car roller is 85-110 N, and the softening times are 2-5 times.

[0040] The adjustment of the softening process depends on the softness and looseness of the fiber after alkali boiling, as well as the linear density of the developed product. When the softness and looseness of the fiber after alkali boiling are good, the feed amount increases, the roller pressure decreases, and the number of softening times decreases. When the linear density of the product developed is low, the feed amount decreases, the roller pressure increases, and the number of softening times increases.

[0041] At the same time, some impurities can be removed during the processing of the soft linen machine, loosening the banyan fiber in advance.

[0042] The opening process is to use external force to promote relative movement between adjacent monofilaments or bundles of different numbers of yarns until the bundles reach a dry, fluffy and non-adhesive state.

[0043] After being opened, the banyan fiber can be made into a banyan fiber roll. Because the strength of the banyan fiber is relatively high and the impurity content is also high, the hitting force is greater, the impurity removal distance and impurity removal amount are larger, and the opening and beating speed is also faster, reaching 600-900r / min.

[0044] Carding and combing process: separate the banyan fiber rolls into single fibers of roughly equal length, remove some dust, lint and impurities, and mix them evenly into banyan fiber strips.

[0045] Drawing process: A drawing frame is used to improve the uniformity of the banyan fiber strips through multiple needle drawing, needle plate drafting, and self-leveling, and to increase the parallel straightness of the banyan fiber to obtain cooked banyan fiber strips.

[0046] In the drawing process, attention should be paid to reducing the damage to the fiber. Since the cellulose content of banyan fiber is high and it is very brittle, the machine speed should be reduced during the process and the number of needle plate strikes should be appropriately reduced.

[0047] In some preferred embodiments, the process parameters are set as needle plate striking times of 500 to 700 times / min, needle plate specifications of 8 to 20 needles / cm, drafting spacing of 30 to 50 mm, sliver quantity of 28 to 65 g / 5 m, and drafting multiples of 4 to 8 times.

[0048] Roving preparation process: Use a roving machine to draw the sliver of banyan fiber into thin roving strips, and add a certain twist. Due to the high cellulose content, high brittleness and poor tensile properties of banyan fiber.

[0049] In some preferred embodiments, the process parameters are set as: front roller speed 130-240r / min, front roller-back roller spacing 200-235mm, twist coefficient 20-33, and draft ratio 5-10 times.

[0050] Preparation process of fine yarn: Use a fine spinning frame to spin the coarse yarn. Due to the low fiber count of banyan fiber and the small number of fiber roots in the cross section, the spinning speed of the fine yarn should not be too fast, the spindle speed should be relatively small, the twist coefficient should be set in the middle, and the drafting multiple should not be too large.

[0051] In some preferred embodiments, the process parameters are set as: front roller speed 60-90r / min, front roller-back roller spacing 210-246mm, twist coefficient 80-95, and draft ratio 9-13 times.

[0052] In some embodiments, the debundling step includes: one pressing, one steam explosion, two pressing, and two steam explosions; the pressing adopts a roller machine with a pressure set to 2-3MPa, the steam explosion pressure is set to 0.8-1.8MPa, and the explosion time is 1-20min.

[0053] Since the fig bast contains more lignin and gum, the two-pressure and two-flash evaporation method can better separate the fig bast into fibers.

[0054] The roller press can effectively crush and crack the fig bark, shake off impurities, and achieve the effect of removing impurities during the pressing process. The steam flash explosion equipment can better separate the fig bark into fibers.

[0055] Considering that excessive pressure in steam explosion equipment will increase energy consumption and safety requirements, in some preferred embodiments, the pressure of the first steam explosion is set to 0.8-1.0 MPa, and the holding time is 10-20 minutes; the pressure of the second steam explosion is set to 0.8-1.0 MPa, and the holding time is 5-15 minutes.

[0056] In some embodiments, the pickling step is carried out at 10-60° C., and the mass ratio of the first acidic solution to the crude fiber of the banyan bast is 2-10:1; the pickling step is carried out in a rotating drum at a rotation speed of.

[0057] The use of drum rotation can accelerate the degradation of colloid and hemicellulose during the pickling process. During the pickling process, the temperature needs to be controlled. The higher the temperature, the faster the degradation of colloid and hemicellulose, but it will also have an adverse effect on the fiber molecular weight. The temperature is controlled at 10-60℃ to achieve an effective degradation rate of colloid and hemicellulose without affecting cellulose.

[0058] In some embodiments, the scouring step comprises the following steps:

[0059] Primary scouring: scouring the pickled Ficus bast crude fiber with a first alkali solution of 5-18 g / L for 1.5-4 h at a bath ratio of 1:6-25 under the conditions of a pressure of 1.5-2.0 MPa and a temperature of 110-130°C;

[0060] Secondary scouring: Under the conditions of pressure 1.5-2.0MPa and temperature 110-130°C, the crude fiber of the ficus bast after the primary scouring is scourred for 0.5-5h with a bath ratio of 1:6-25 using a second alkali solution with a concentration of 5-16g / L.

[0061] The inventors found that if only one scouring is used or the alkali boiling concentration is too low, the residual rubber rate of the fiber is high, and ultimately no single fiber can be obtained, and it is impossible to weave; at the same time, if the alkali boiling concentration is too high, the fiber will be severely damaged, and the ficus fiber will not be spinnable in the end. Therefore, by using a secondary scouring method and controlling the alkali concentration, a single ficus fiber with spinnability can be obtained.

[0062] In some embodiments, the first alkali solution and the second alkali solution are prepared by mixing caustic soda, soda ash and sodium carbonate with water, and the mass ratio of the caustic soda, soda ash and sodium carbonate is 70-80:12-17:8-12.

[0063] The components of the alkali solution also affect the properties of the fig fiber. The inventors found in their research that when the alkali solution is composed of the above proportions, a spinnable fig fiber can be obtained.

[0064] In some preferred embodiments, the mass ratio of caustic soda, soda ash and sodium carbonate is 75:15:10.

[0065] In some embodiments, the manufacturing rate of the ficus beard fiber is 45%-60%, and the residual glue rate of the ficus beard fiber is 1-3%.

[0066] In some embodiments, the average length of the ficus fiber is 6-35 mm, the elongation at break is 1-11%, the linear density is 2.61-5.10 dtex, the moisture regain under standard conditions is 7-11%, the breaking strength is 2.3-5.7 cN / dtex, and the mass specific resistance is 10 5 -10 7 Ωg / CM 2 .

[0067] In some embodiments, the ramie spinning method also includes three scouring steps: the pickled fig bast crude fiber is scourred for 0.5-5 hours at a pressure of 1.5-2.0 MPa and a temperature of 110-130°C using a third alkali solution with a concentration of 5-16 g / L and a bath ratio of 1:6-25.

[0068] Different from common hemp fibers such as ramie fibers, banyan fiber has higher content of colloid and lignin, but lower content of cellulose. Therefore, it needs further preliminary processing according to product needs before spinning.

[0069] If it is used to weave cloth with coarse yarn, three scourings are not required, and the number of soft linen processes is relatively small.

[0070] If you are looking for fabric products with medium and fine yarns, you need to cook them three times and perform further degumming to obtain finer technical fibers.

[0071] The inventors also provide a yarn containing Ficus microcarpa fibers, and the yarn containing Ficus microcarpa fibers is prepared by any of the preparation methods described above.

[0072] Different from the prior art, the yarn of the above technical solution is mainly prepared from banyan fiber, which effectively removes cellulose and gummed paper, making the banyan fiber spinnable, making full use of the components of the banyan fiber, and being natural and environmentally friendly.

[0073] Example 1 A textile yarn (coarse yarn) containing banyan fiber and a preparation method thereof

[0074] Unwind:

[0075] The bast of banyan tree is pressed and steam exploded to obtain the crude fiber of the bast of banyan tree; the process includes one pressing, one steam explosion, two pressing and two steam explosion; the pressing adopts a roller machine with a pressure of 2-3MPa, the pressure of the first steam explosion is set to 0.8-1.0MPa, and the holding time is 10min-20min; the pressure of the second steam explosion is set to 0.8-1.0MPa, and the holding time is 5min-15min.

[0076] Pickling:

[0077] The crude fiber of fig whisker bast is immersed in a first acidic solution containing 0.05-0.1% sulfuric acid and 0.05-0.1% hydrochloric acid for 2-20 hours, and then washed with water to obtain the crude fiber of fig whisker bast after acid immersion; the temperature is 10-60°C, and the mass ratio of the first acidic solution to the crude fiber of fig whisker bast is 2-10:1; the acid immersion step is carried out in a rotating drum.

[0078] Cooking:

[0079] The acid-soaked crude fiber of fig bast is scoured twice with alkali solution to obtain scour crude fiber of fig bast;

[0080] Primary scouring: scouring the pickled Ficus bast crude fiber with a first alkali solution of 5-18 g / L for 1.5-4 h at a bath ratio of 1:6-25 under the conditions of a pressure of 1.5-2.0 MPa and a temperature of 110-130°C;

[0081] Secondary scouring: Under the conditions of pressure 1.5-2.0MPa and temperature 110-130°C, the crude fiber of fig bast after the primary scouring is scoured with a second alkali solution of concentration 5-16g / L for 0.5-5h and a bath ratio of 1:6-25. The first alkali solution and the second alkali solution are prepared by mixing caustic soda, soda ash and sodium carbonate with water, and the mass ratio of caustic soda, soda ash and sodium carbonate is 75:15:10.

[0082] Fiber beating:

[0083] The scouring Ficus beard bast crude fiber is beaten and washed with high pressure water at a pressure of 2-4 MPa to remove the residual glue impurities on the fiber and loosen the fiber to obtain Ficus beard fiber;

[0084] Pickling:

[0085] The ficus fiber is pickled with a second acidic solution containing 0.01-0.05% sulfuric acid and 0.01-0.05% hydrochloric acid, and then washed with water and dehydrated to obtain the pickled ficus fiber;

[0086] Oil supply:

[0087] The acid-washed banyan fiber was bathed in amino silicone oil for 0.5 min. The oil content of the banyan fiber was 0.1% after the oil bath.

[0088] Soft numbness:

[0089] Use a softening machine for processing, with a feed amount of 500-600 g, an empty roller pressure of 85-110 N, and 3 softening times.

[0090] The adjustment of the softening process depends on the softness and looseness of the fiber after alkali boiling, as well as the linear density of the developed product. When the softness and looseness of the fiber after alkali boiling are good, the feed amount increases, the roller pressure decreases, and the number of softening times decreases. When the linear density of the product developed is low, the feed amount decreases, the roller pressure increases, and the number of softening times increases.

[0091] Opening:

[0092] The fiber is opened by an opening machine to make a fiber roll. The speed of the opening beater is 600-900r / min.

[0093] Combing and combing:

[0094] The banyan fiber rolls are separated into single fibers of roughly equal length, and after removing some dust, hemp skin and impurities, they are evenly mixed to form banyan fiber strips.

[0095] Drawing:

[0096] The drawing frame is used to improve the uniformity of the slivers of the fig whisker fiber through multi-pass needle drawing, needle board drafting, and self-leveling, and improve the parallel straightness of the slivers of the fig whisker fiber to obtain the slivers of the fig whisker fiber. The process parameters are set as needle board strikes 500-700 times / min, needle board specifications 8-20 needles / cm, drafting distance 30-50mm, sliver weight 28-65g / 5m, and drafting multiples 4-8 times.

[0097] Roving preparation:

[0098] The roving machine is used to draw the sliver of the banyan fiber into thin roving slivers and add a certain twist. The process parameters are set as: front roller speed 130-240r / min, front roller-back roller spacing 200-235mm, twist coefficient 20-33, and drafting multiple 5-10 times.

[0099] Yarn preparation:

[0100] The roving is finely spun using a spinning frame, and the process parameters are set as: front roller speed 60-90r / min, front roller-back roller spacing 210-246mm, twist coefficient 80-95, and draft multiple 9-13 times.

[0101] The production rate of the banyan fiber in Example 1 is 45%-60%, and the residual glue rate is 1-3%.

[0102] The average length of the ficus fiber is 6-35 mm, the elongation at break is 5-10%, the linear density is 2.61-5.10 dtex, the moisture regain under standard conditions is 7-11%, the breaking strength is 2.3-5.7 cN / dtex, the mass specific resistance is 10 5 -10 7 Ωg / CM 2 .

[0103] Example 2 A textile yarn (medium and fine count yarn) containing banyan fiber and a preparation method thereof

[0104] Unwind:

[0105] The bast of banyan tree is pressed and steam exploded to obtain the crude fiber of the bast of banyan tree; the process includes one pressing, one steam explosion, two pressing and two steam explosion; the pressing adopts a roller machine with a pressure of 2-3MPa, the pressure of the first steam explosion is set to 0.8-1.0MPa, and the holding time is 10min-20min; the pressure of the second steam explosion is set to 0.8-1.0MPa, and the holding time is 5min-15min.

[0106] Pickling:

[0107] The crude fiber of fig whisker bast is immersed in a first acidic solution containing 0.05-0.1% sulfuric acid and 0.05-0.1% hydrochloric acid for 2-20 hours, and then washed with water to obtain the crude fiber of fig whisker bast after acid immersion; the temperature is 10-60°C, and the mass ratio of the first acidic solution to the crude fiber of fig whisker bast is 2-10:1; the acid immersion step is carried out in a rotating drum.

[0108] Cooking:

[0109] The acid-soaked crude fiber of fig bast is scoured twice with alkali solution to obtain scour crude fiber of fig bast;

[0110] Primary scouring: scouring the pickled Ficus bast crude fiber with a first alkali solution of 5-18 g / L for 1.5-4 h at a bath ratio of 1:6-25 under the conditions of a pressure of 1.5-2.0 MPa and a temperature of 110-130°C;

[0111] Secondary scouring: Under the conditions of pressure 1.5-2.0MPa and temperature 110-130°C, the crude fiber of fig bast after the primary scouring is scoured with a second alkali solution of concentration 5-16g / L for 0.5-5h and a bath ratio of 1:6-25. The first alkali solution and the second alkali solution are prepared by mixing caustic soda, soda ash and sodium carbonate with water, and the mass ratio of caustic soda, soda ash and sodium carbonate is 75:15:10.

[0112] Fiber beating:

[0113] The scouring Ficus beard bast crude fiber is beaten and washed with high pressure water at a pressure of 2-4 MPa to remove the residual glue impurities on the fiber and loosen the fiber to obtain Ficus beard fiber;

[0114] Pickling:

[0115] The ficus fiber is pickled with a second acidic solution containing 0.01-0.05% sulfuric acid and 0.01-0.05% hydrochloric acid, and then washed with water and dehydrated to obtain the pickled ficus fiber;

[0116] Oil supply:

[0117] The acid-washed banyan fiber was bathed in amino silicone oil for 0.5 min. The oil content of the banyan fiber was 0.1% after the oil bath.

[0118] Three times of cooking:

[0119] The Ficus Ficus Fiber is scoured with a third alkali solution having a concentration of 5-16 g / L for 0.5-5 hours at a pressure of 1.5-2.0 MPa and a temperature of 110-130° C., with a bath ratio of 1:6-25.

[0120] Soft numbness:

[0121] Use a soft hemp machine for processing, with a feed amount of 600-800 g, an empty roller pressure of 90-100N, and 5 soft hemp times.

[0122] Opening:

[0123] The fiber is opened by an opening machine to make a fiber roll. The speed of the opening beater is 600-900r / min.

[0124] Combing and combing:

[0125] Use combing and combing equipment to separate the banyan fiber rolls into single fibers of roughly equal length. After removing some dust, hemp skin and impurities, they are evenly mixed into banyan fiber strips.

[0126] Drawing:

[0127] The drawing frame is used to improve the uniformity of the slivers of the fig whisker fiber through multi-pass needle drawing, needle board drafting, and self-leveling, and improve the parallel straightness of the slivers of the fig whisker fiber to obtain the slivers of the fig whisker fiber. The process parameters are set as needle board strikes 500-700 times / min, needle board specifications 8-20 needles / cm, drafting distance 30-50mm, sliver weight 28-65g / 5m, and drafting multiples 4-8 times.

[0128] Roving preparation:

[0129] The roving machine is used to draw the sliver of the banyan fiber into thin roving slivers and add a certain twist. The process parameters are set as: front roller speed 130-240r / min, front roller-back roller spacing 200-235mm, twist coefficient 20-33, and drafting multiple 5-10 times.

[0130] Yarn preparation:

[0131] The roving is finely spun using a spinning frame, and the process parameters are set as: front roller speed 60-90r / min, front roller-back roller spacing 210-246mm, twist coefficient 80-95, and draft multiple 9-13 times.

[0132] The manufacturing rate of the ficus fiber in Example 2 is 45%-60%, and the residual glue rate is 1-3%. The average length of the ficus fiber is 6-35 mm, the elongation at break is 6-11%, the linear density is 2.61-5.10 dtex, the regain under standard conditions is 7-11%, the breaking strength is 2.3-5.7 cN / dtex, and the mass specific resistance is 10 5 -10 7 Ωg / CM 2 .

[0133] The textile yarn containing the fig whisker fiber is then processed into fabrics containing the fig whisker fiber through weaving and knitting technology, which has broad market application prospects and is mainly used in household textile products, pharmacological effects, high-performance industrial materials, environmental governance and other aspects for high-value development. The development and utilization of the fig whisker can not only reduce environmental pollution and increase the source of natural fibers, but also meet people's health and environmental protection concepts. The fig whisker has some characteristics of both cotton and linen fibers. For example, in the production process, it reduces the use of chemicals, reduces fiber damage, and improves the spinnability of fibers, which will surely provide a broad development prospect for the fig whisker fiber.

[0134] Finally, it should be noted that although the above embodiments have been described in the text of the specification of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the text of the specification of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A method for preparing a textile yarn containing banyan fiber, characterized in that: The preparation method comprises the following steps: Debonding: Pressing and steam-exploding the bast of the fig whiskers to obtain the crude fiber of the bast of the fig whiskers; Acid soaking: soaking the crude fiber of fig bast in a first acid solution containing 0.05-0.1% sulfuric acid and 0.05-0.1% hydrochloric acid for 2-20 hours, and then washing with water to obtain the crude fiber of fig bast after acid soaking; Scouring: Scouring the acid-soaked crude fiber of fig beard bast twice with alkali solution to obtain the scouring crude fiber of fig beard bast; Beating: Beat the scouring bast crude fiber of banyan tree and wash it with high pressure water of 2-4MPa to obtain banyan tree fiber; Ramie spinning: After the banyan fiber is dried, it is processed using the ramie spinning method to obtain yarn containing banyan fiber; The preparation method further comprises a pickling step and an oiling step, wherein the pickling and oiling steps are arranged before the ramie spinning step; The pickling step comprises: pickling the fig whisker fiber with a second acidic solution containing 0.01-0.05% sulfuric acid and 0.01-0.05% hydrochloric acid, then washing with water and dehydrating to obtain the pickled fig whisker fiber; The oiling step comprises: the pickled Banyan fiber with amino silicone oil oil bath, the oil bath time is 0.1-1min, the oil content of Banyan fiber after the oil bath is 0.8-1.2%; The ramie spinning method comprises the following steps: softening, opening, carding, combing, drawing, roving preparation and spun yarn preparation; The debonding step includes: a press, a steam explosion, a second press, a second steam explosion; the pressing pressure is set to 2-3MPa roller machine, the steam explosion pressure is set to 0.8-1.8MPa, and the explosion time is 1-20min; The pickling step is carried out at 10-60 ° C, the mass ratio of the first acidic solution to the crude fiber of the ficus bast is 2-10: 1; the pickling step is carried out in a rotating drum; The scouring step comprises the following steps: Primary scouring: scouring the pickled Ficus bast crude fiber with a first alkali solution of 5-18 g / L for 1.5-4 h at a bath ratio of 1:6-25 under the conditions of a pressure of 1.5-2.0 MPa and a temperature of 110-130°C; Secondary scouring: under the conditions of pressure 1.5-2.0MPa and temperature 110-130°C, the crude fiber of the ficus bast after the primary scouring is scourred for 0.5-5h with a second alkali solution of concentration 5-16g / L and a bath ratio of 1:6-25; The first alkali solution and the second alkali solution are prepared by mixing caustic soda, soda ash and sodium carbonate with water, and the mass ratio of the caustic soda, soda ash and sodium carbonate is 70-80:12-17:8-12.

2. The preparation method according to claim 1, characterized in that: The manufacturing rate of the ficus fiber is 45%-60%, the residual rubber rate of the ficus fiber is 1-3%; the average length of the ficus fiber is 6-35mm, the elongation at break is 1-11%, the linear density is 2.61-5.10dtex, the regain under standard conditions is 7-11%, the breaking strength is 2.3-5.7cN / dtex, the mass specific resistance is 10 5 -10 7 Ωg / CM 2 .

3. The preparation method according to claim 1, characterized in that: The ramie spinning method also includes three scouring steps: scouring the banyan fiber with a third alkali solution with a concentration of 5-16g / L for 0.5-5h and a bath ratio of 1:6-25 under the conditions of a pressure of 1.5-2.0MPa and a temperature of 110-130°C.

4. A yarn containing banyan fiber, characterized in that: The yarn containing banyan fiber is prepared by the preparation method described in any one of claims 1-3.