Knitted twill cool jean fabric for tight pants

Abstract

The invention provides a knitted twill cool denim fabric for tight pants. The invention further provides a preparation method of the knitted twill cool-feeling jean fabric for the tight pants. The invention further provides application of the knitted twill cool-feeling jean fabric for the tight pants in the tight pants. The knitted twill cool-feeling jean fabric for the tight pants is more comfortable and softer, has more excellent elasticity, can achieve the layered effect of washing and fading of traditional jean, is high in contact cool feeling degree, and can make people have instant cool feeling.

Description

Technical Field

[0001] The invention belongs to the technical field of textiles and relates to a knitted twill cool denim fabric for tights. Background Art

[0002] After more than a hundred years of development and evolution, denim clothing has not changed much in style and design, and has always been loved by people for its unique style. The improvement of denim clothing is more about the comfort and functionality of clothing. Denim fabrics have evolved from simple woven twill to weaving with a variety of yarns with different structural properties, including knitted denim, imitation denim, printed denim, etc., and have accumulated a rich variety of styles.

[0003] In the hot summer, people need clothes that give them a cool feeling. When people exercise outdoors, they produce a lot of sweat. Due to the small space between the skin and the clothes, the convection is weak, and the sweat evaporates slowly, resulting in the heat generated by the human body not being discharged from the body in time, causing stuffiness and discomfort. In the existing technology, most people choose to apply cooling agents on the fabric, such as mint cooling agents, but the experience is not good, and the cooling effect basically disappears with the increase in the number of washings. Summary of the invention

[0004] In view of the characteristics of the prior art described above, the purpose of the present invention is to provide a knitted twill cool denim fabric for leggings, which is used to solve the shortcomings of the existing fabrics that the fabrics are treated with cooling additives but the experience effect is not good, and the cooling effect basically disappears with the increase in the number of washings, thereby providing a denim fabric with improved contact coolness.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides a knitted twill cool denim fabric for leggings in a first aspect. The fabric is a single-sided three-needle knitted structure, including a plurality of minimum cycle structures, each of which includes 3 wales and 6-mode rows; the structural unit formed by the first wale and the 6-mode rows includes: the second mode, the fourth mode, the fifth mode, and the sixth mode of the 6-mode rows form a loop structural unit; the first mode and the third mode of the 6-mode rows form a loop structural unit A floating line structural unit; the structural unit formed by the second coil longitudinal row and the 6-mode coil horizontal row includes: the 1st and 5th dies of the 6-mode coil horizontal row form a floating line structural unit; the 2nd, 3rd, 4th and 6th dies of the 6-mode coil horizontal row form a loop structural unit; the structural unit formed by the third coil longitudinal row and the 6-mode coil horizontal row includes: the 1st, 2nd, 4th and 6th dies of the 6-mode coil horizontal row form a loop structural unit; the 3rd and 5th dies of the 6-mode coil horizontal row form a floating line structural unit.

[0006] The second aspect of the present invention provides a method for preparing a knitted twill cool denim fabric for leggings, comprising: weaving with yarns, and post-finishing the formed grey cloth to provide the desired fabric.

[0007] A third aspect of the present invention provides a use of a knitted twill cool denim fabric for leggings in leggings.

[0008] As described above, the knitted twill cool denim fabric for leggings provided by the present invention has the following beneficial effects:

[0009] (1) The present invention provides a knitted twill cool denim fabric for leggings, which has the characteristics of tight and thick texture, bright color and clear texture after shrinkage-proof finishing compared with traditional denim fabrics. This fabric can achieve the visual appearance and woven texture of traditional denim through yarn selection, organization structure, pattern design and post-finishing method, and is more comfortable and softer than traditional denim fabrics.

[0010] (2) The present invention provides a knitted twill cool denim fabric for leggings, which has better elasticity than traditional denim fabrics.

[0011] (3) The present invention provides a knitted twill cool denim fabric for leggings, which retains the twill texture of traditional denim in appearance and can achieve the layered effect of traditional denim washing and fading by controlling the dyeing process.

[0012] (4) The present invention provides a knitted twill cool denim fabric for leggings. By combining the loop-forming characteristics of the knitted structure with the filament fiber with the cool feeling of the original yarn, the contact area between the cool side of the fabric and the skin is increased, giving people an instant cool feeling.

[0013] (5) The present invention provides a knitted twill cool denim fabric for leggings, which is characterized by its comfort through performance test results such as elasticity, lightness, moisture permeability, and coolness. The fabric has a permanent cool effect, which solves the problem that the cool effect of ordinary fabrics treated with cool additives is not washable. It is less likely to feel stuffy when worn than traditional woven stretch denim. The elasticity and lightness of the finished garment are better than those of the finished garments made of traditional woven stretch denim fabrics. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It shows a knitting diagram of a knitted twill cool denim fabric for leggings in the present invention, wherein 1 is a knitting needle of a syringe, 2 is a loop structure unit knitted by the knitting needle of the syringe, 3 is a floating thread structure unit knitted by the knitting needle of the syringe; 11 to 16 are respectively the 1st to 6th modes of a 6-mode coil row; 21 represents a minimum cycle organization.

[0015] Figure 2 Shown is a real-object picture of the coils of a knitted twill cool denim fabric for leggings in the present invention, wherein 11 to 16 are the 1st to 6th modes of 6-mode coil horizontal rows respectively. DETAILED DESCRIPTION

[0016] The following detailed description specifically discloses an embodiment of a micro-textured pet hair-proof yoga fabric of the present application. However, there may be cases where unnecessary detailed descriptions are omitted. For example, there are cases where detailed descriptions of well-known matters and repeated descriptions of actually the same structure are omitted. This is to avoid the following description from becoming unnecessarily lengthy and to facilitate the understanding of those skilled in the art. In addition, the following description is provided for those skilled in the art to fully understand the present application and is not intended to limit the subject matter described in the claims.

[0017] Definition of terms

[0018] In weft knitted fabrics, loop formation as a structural unit means that the whole needle is taken, and the knitting needle completes the entire weaving process to form a loop, so the loop formation structural unit is also called the loop structural unit; non-weaving as a structural unit means that no needle is taken, and a floating line is formed on the back of the fabric, which is also called a floating line structural unit.

[0019] In knitted fabrics, a row of coils along the horizontal direction of the fabric is called a coil row; a row of coils interlaced along the vertical direction is called a coil wale. An n-mode coil row (n is a positive integer not less than ) is called the 1st mode, the 2nd mode, ... the nth mode from left to right. An n-mode coil wale (n is a positive integer not less than ) is called the 1st mode, the 2nd mode, ... the nth mode from top to bottom.

[0020] "Scope" disclosed in the present application is limited in the form of lower limit and upper limit, and a given range is limited by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundary of a special range. The scope limited in this way can be including end values ​​or not including end values, and can be arbitrarily combined, that is, any lower limit can be combined with any upper limit to form a scope. For example, if the scope of 60-120 and 80-110 is listed for a specific parameter, it is understood that the scope of 60-110 and 80-120 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 scope can be all expected: 1-3, 1-4, 1-5, 2-3, 2-4 and 2-5. In the present application, unless otherwise specified, the numerical range "ab" represents the abbreviation of any real number combination between a and b, wherein a and b are 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.

[0021] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0022] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0023] Unless otherwise specified, all steps of the present application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (1) and (2), which means that the method may include steps (1) and (2) performed sequentially, or may include steps (2) and (1) performed sequentially. For example, the method may further include step (3), which means that step (3) may be added to the method in any order, for example, the method may include steps (1), (2) and (3), or may include steps (1), (3) and (2), or may include steps (3), (2) and (1), etc.

[0024] 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.

[0025] 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).

[0026] The first aspect of the present invention provides a knitted twill cool denim fabric for leggings, such as Figure 1-2 As shown, the fabric is a single-sided three-needle knitting structure, including a plurality of minimum cycle structures, each of which includes 3 wales of coils and 6 rows of coils;

[0027] The structural unit formed by the first coil row and the 6-mode coil row includes: the second mode, the fourth mode, the fifth mode, and the sixth mode of the 6-mode coil row form a loop structural unit; and the first mode and the third mode of the 6-mode coil row form a floating line structural unit;

[0028] The structural unit formed by the second coil wale and the 6-mode coil row includes: the first and fifth dies of the 6-mode coil row form a floating line structural unit; the second, third, fourth and sixth dies of the 6-mode coil row form a loop structural unit;

[0029] The structural unit formed by the third coil column and the 6-mode coil horizontal row includes: the first die, the second die, the fourth die, and the sixth die of the 6-mode coil horizontal row form a loop structural unit; and the third die and the fifth die of the 6-mode coil horizontal row form a floating wire structural unit.

[0030] In the above fabric, the back side of the fabric presents a twill appearance.

[0031] The second aspect of the present invention provides a method for preparing a knitted twill cool denim fabric for leggings, comprising: weaving with yarns, and post-finishing the formed grey cloth to provide the desired fabric.

[0032] In the above method, the yarn is selected from at least one of filaments, cellulose yarns, and elastic fibers.

[0033] In one embodiment, the filaments are chemical fibers with a cooling effect, and the materials include but are not limited to polyester and nylon. Specifically, the material of the filaments is selected from at least one of polyester and nylon.

[0034] In one embodiment, the material of the cellulose yarn includes but is not limited to cotton, linen, viscose, and lyocell. Specifically, the material of the cellulose yarn is selected from at least one of cotton, linen, viscose, and lyocell.

[0035] In one embodiment, the material of the elastic fiber includes but is not limited to spandex and polyolefin. Specifically, the material of the elastic fiber is selected from at least one of spandex and polyolefin.

[0036] In one embodiment, the yarn is woven using two types of yarns, the yarns used in the 1st, 3rd and 5th modes of the 6-mode coil row are filaments, and the yarns used in the 2nd, 4th and 6th modes of the 6-mode coil row are cellulose yarns and elastic fibers that are woven simultaneously.

[0037] In a preferred embodiment, the ratio of the number of the filaments, the cellulose yarns, and the elastic fibers is 1:1:1.

[0038] In the above method, the weaving is performed by using a single-sided four-needle-pass circular knitting machine to perform single-sided three-needle-pass knitting.

[0039] In the above method, in the single-sided three-needle knitting method, the knitting needles of the needle cylinder are three-section needles, and the needle arrangement method of the needle cylinder adopts ABC cycle arrangement.

[0040] In the above method, the weaving adopts 3 coil wales and 6 mode coil horizontal rows to form a minimum cycle structure, and then forms a cloth surface through a plurality of minimum cycle structures to obtain a grey cloth.

[0041] In one embodiment, in the minimum circulation organization, the first coil column and the second mode, the fourth mode, the fifth mode, and the sixth mode of the 6-mode coil horizontal row form a loop structure unit; the first coil column and the first mode and the third mode of the 6-mode coil horizontal row form a floating line structure unit; the second coil column and the first mode and the fifth mode of the 6-mode coil horizontal row form a floating line structure unit; the second coil column and the second mode, the third mode, the fourth mode, and the sixth mode of the 6-mode coil horizontal row form a loop structure unit; the third coil column and the first mode, the second mode, the fourth mode, and the sixth mode of the 6-mode coil horizontal row form a loop structure unit; the third coil column and the third mode and the fifth mode of the 6-mode coil horizontal row form a floating line structure unit. The structure of the specific minimum circulation organization is shown in Table 1 below.

[0042] Table 1

[0043] 1st coil wale － ︿ － ︿ ︿ ︿ 2nd coil wale － ︿ ︿ ︿ － ︿ 3rd coil wale ︿ ︿ － ︿ － ︿ 6-mode coil row Model 1 Model 2 Model 3 Model 4 Model 5 Model 6

[0044] In Table 1, ︿ represents loop, and - represents floating line.

[0045] In the above method, the post-finishing includes: singeing, scouring, alkali reduction, dyeing and shaping of the grey cloth.

[0046] In one embodiment, the singeing is performed using a gas singeing machine.

[0047] In one embodiment, the singeing measurement conditions are: one burner is positive and the other is negative, double-sided singeing; the vehicle speed is controlled at 80-120m / min, specifically 80-100m / min, 100-120m / min; the distance between the fabric and the flame is 0.8-1.0cm, specifically 0.8-0.9cm, 0.9-1.0cm; the gasoline vaporization amount is 20-25kg / h, specifically 20-23kg / h, 23-25kg / h; the vaporization temperature is ≥80°C, preferably 80°C.

[0048] During the spinning and weaving process, the fabric will produce a lot of fluff due to mechanical friction. The purpose of singeing is to remove this fluff.

[0049] In one embodiment, the scouring is performed by using caustic soda, oil remover, scouring agent and other scouring agents. The purpose of scouring is to remove oil and impurities on the fiber.

[0050] Specifically, caustic soda, degreasing agent, refining agent and other scouring agents are used to dissolve, degrade and dissolve some impurities in the fabric directly in the scouring liquid in an alkaline bath at a certain temperature; some impurities lose their binding force with the fibers due to swelling and fall off from the fabric through water washing; some impurities are peeled off from the fabric through the dissolving effect of additives.

[0051] In a preferred embodiment, the amount of caustic soda added to the scouring liquid is 3-5 g / L, specifically 3-4 g / L, 4-5 g / L. The caustic soda is sodium hydroxide.

[0052] In a preferred embodiment, the degreasing agent is a conventional degreasing agent. Specifically, the degreasing agent can be TF-101H special degreasing agent produced by Chuanhua Company. The TF-101H special degreasing agent is in the form of solid powder.

[0053] The main components of the oil remover include inorganic salts and surfactants, which can play a key role in oil removal during the scouring process.

[0054] In a preferred embodiment, the amount of the oil remover added to the scouring liquid is 1-1.5 g / L, specifically 1-1.3 g / L, 1.3-1.5 g / L.

[0055] In a preferred embodiment, the refining agent is a conventionally used refining agent. Specifically, the refining agent can be a compound of a phosphate surfactant and a fatty alcohol polyoxyethylene ether, which can enhance the thermal stability of the fabric in the solution. The refining agent is in the form of a solid powder.

[0056] In a preferred embodiment, the amount of the refining agent added to the scouring liquid is 1-2 g / L, specifically 1-1.5 g / L, 1.5-2 g / L.

[0057] In a preferred embodiment, the other scouring agents include sodium silicate and sodium bisulfite, which are used to absorb impurities and improve fabric whiteness, respectively.

[0058] In a further preferred embodiment, the amount of sodium silicate added to the scouring liquid is 1.5-3 g / L, specifically 1.5-2 g / L, 2-3 g / L.

[0059] In a further preferred embodiment, the amount of sodium bisulfite added to the scouring liquid is 0.5-1.5 g / L, specifically 0.5-1 g / L, 1-1.5 g / L.

[0060] In one embodiment, the scouring temperature is 110-120°C, such as 110-115°C, 115-120°C.

[0061] In one embodiment, the scouring treatment time is 30-50 min, such as 30-40 min, 40-50 min.

[0062] In one embodiment, the alkali used in the alkali reduction is an aqueous solution of sodium hydroxide.

[0063] In a preferred embodiment, the concentration of the aqueous solution of sodium hydroxide is 10-15 g / L, such as 10-12 g / L, 12-15 g / L.

[0064] In one embodiment, the alkali reduction temperature is 120-130°C, such as 120-125°C, 125-130°C, preferably 125°C.

[0065] In one embodiment, the alkali reduction treatment time is 35-45 min, specifically 35-40 min, 40-45 min, preferably 40 min.

[0066] The above-mentioned alkali reduction is to improve the softness and improve the pilling by using the peeling effect of caustic soda, i.e. sodium hydroxide, on polyester. Specifically, during the alkali reduction treatment, the surface of the polyester is corroded by alkali, its weight is reduced, the fiber diameter becomes thinner, pits are formed on the surface, the rigidity of the fiber is reduced, the luster of the polyester yarn is eliminated, and the gaps at the interlacing points of the fabric are increased, making the fabric soft to the touch, soft in luster, and improving moisture absorption and perspiration.

[0067] In one embodiment, the dyeing is performed only on the cellulose yarns in the grey fabric.

[0068] In one embodiment, the dyeing is performed by adding water to the grey cloth to adjust the pH, adding a sulfur dye to perform heating dyeing, and then adding sodium sulfate to continue the heat-dyeing and then draining the water.

[0069] In a preferred embodiment, the weight ratio of the grey cloth to water is 1:10-15, specifically 1:10-12, 1:12-15.

[0070] In a preferred embodiment, the pH is adjusted to 5-6.

[0071] In a preferred embodiment, the weight ratio of the sulfur dye to the grey cloth is 1:0.8-1.2, specifically 1:0.8-1.0, 1:1.0-1.2.

[0072] In a preferred embodiment, the sulfur dye is a commonly used sulfur dye with weak reducing property.

[0073] Specifically, the sulfur dye is a type of sulfur-containing dye obtained by co-melting sodium polysulfide or sulfur with amine or phenolic compounds of aromatic hydrocarbons. It needs to be reduced to a leuco form with a reducing agent, preferably sodium sulfide, before it can be used to dye the fiber. The leuco form of the sulfur dye exists in the dye liquor as an anion state. It is direct to cellulose fibers, can be adsorbed on the fiber surface, diffused into the fiber interior, and oxidized to color. The above dyeing can dye cellulose yarns in fabrics.

[0074] In a preferred embodiment, the sulfur dye is added for 18-22 minutes, specifically 18-20 minutes, 20-22 minutes, preferably 20 minutes. The sulfur dye is stirred evenly and then slowly added into the water.

[0075] In a preferred embodiment, when the sulfur dye is heated for dyeing, it is first kept at 20-30°C for 8-12 minutes, preferably at 25°C for 10 minutes, then slowly heated to 90-100°C for 8-12 minutes, preferably heated to 95°C at 1-2°C / min for 10 minutes.

[0076] In a preferred embodiment, the weight ratio of the sodium sulfate to the grey cloth is 1 to 2:20, specifically 1:20, 1.5:20, or 2:20.

[0077] When the sodium sulfate is added, it is added in the form of a solution with a certain concentration by adding water. The addition of sodium sulfate can promote the dyeing of the leuco form of the sulphur dye and increase the color yield.

[0078] In a preferred embodiment, the heat preservation and dyeing time is 30-40 minutes, specifically 30-35 minutes, 35-40 minutes.

[0079] In one embodiment, the shaping temperature is 180-190°C, such as 180-185°C, 185-190°C.

[0080] In one embodiment, the shaping speed is 30-40 m / min, such as 30-35 m / min, 35-40 m / min.

[0081] In one embodiment, the standardized overfeeding is 1-3%, such as 1-2%, 2-3%.

[0082] In one embodiment, the shaping time is 40-50 s, such as 40-45 s, 45-50 s.

[0083] In the above-mentioned setting, the fabric can improve its dimensional stability after heat setting, and is not easy to deform even under dyeing and finishing conditions such as wet heat and the like and in the subsequent wearing process.

[0084] In one embodiment, the cloth is inspected and packaged after shaping.

[0085] A third aspect of the present invention provides a use of a knitted twill cool denim fabric for leggings in leggings.

[0086] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0087] In the following examples, unless otherwise specified, raw materials or processing techniques are conventional commercially available raw materials or conventional processing techniques in the art.

[0088] Example 1

[0089] A single-sided four-needle circular knitting machine is used for single-sided three-needle knitting. The minimum cycle structure is formed by 3 longitudinal rows of coils and the corresponding 6 horizontal rows of coils. The fabric surface is then formed by several minimum cycle structures to obtain grey fabric sample 1#. Among them, the first coil column and the second, fourth, fifth and sixth dies of the 6-mode coil horizontal row form a loop structure unit; the first coil column and the first and third dies of the 6-mode coil horizontal row form a floating line structure unit; the second coil column and the first and fifth dies of the 6-mode coil horizontal row form a floating line structure unit; the second coil column and the second, third, fourth and sixth dies of the 6-mode coil horizontal row form a loop structure unit; the third coil column and the first, second, fourth and sixth dies of the 6-mode coil horizontal row form a loop structure unit; the third coil column and the third and fifth dies of the 6-mode coil horizontal row form a floating line structure unit; thereby forming a minimum circulation organization.

[0090] The yarn is knitted with two kinds of yarns, the yarns used in the first, third and fifth modes of the 6-mode coil row are filaments, and the yarns used in the second, fourth and sixth modes of the 6-mode coil row are cellulose yarns and elastic fibers knitted at the same time. The filaments are made of polyester, the cellulose yarns are made of cotton, and the elastic fibers are made of spandex, and the ratio of the filaments, cellulose yarns and elastic fibers is 1:1:1.

[0091] In the single-sided three-needle knitting method, the knitting needles of the needle cylinder are three-section needles, and the needle arrangement of the needle cylinder adopts ABC cycle arrangement.

[0092] The grey cloth sample 1# is subjected to singeing, scouring, alkali reduction, dyeing, shaping, inspection and packaging.

[0093] The singeing is carried out in a gas singeing machine, and the measurement conditions of singeing are: one burner is positive and the other is negative, double-sided singeing; the vehicle speed is controlled at 100m / min; the distance between the fabric and the flame is 0.9cm; the gasoline gasification amount is 23kg / h; and the gasification temperature is 80℃.

[0094] Scouring is performed at 115°C for 40 minutes using caustic soda, oil remover, refining agent, and other scouring agents. The caustic soda is sodium hydroxide, and the amount of caustic soda added to the scouring solution is 4g / L; the oil remover is TF-101H special oil remover, and the amount of oil remover added to the scouring solution is 1.3g / L; the refining agent is a phosphate surfactant and a fatty alcohol polyoxyethylene ether compounded refining agent, and the amount of the refining agent added to the scouring solution is 1.5g / L; other scouring agents include sodium silicate and sodium bisulfite, and the amount of sodium silicate added to the scouring solution is 2.3g / L, and the amount of sodium bisulfite added to the scouring solution is 1.0g / L.

[0095] The alkali used for alkali reduction is an aqueous solution of sodium hydroxide, the concentration of the aqueous solution of sodium hydroxide is 12 g / L, the temperature of alkali reduction is 125° C., and the treatment time is 40 min.

[0096] The cellulose yarn in the grey cloth sample 1# was dyed, and the pH was adjusted after adding water, and then sulfur dye was added for heating dyeing, and then sodium sulfate was added to continue to keep warm and dyeing before draining. Among them, the weight ratio of grey cloth to water was 1:12, and the pH value of water was adjusted to 5.5. The sulfur dye with weak reducing properties was stirred evenly and slowly added to the water within 20 minutes. The weight ratio of sulfur dye to grey cloth was 1:1, and it was kept warm at 25°C for 10 minutes and then slowly raised to 95°C at 1.5°C / min. After keeping warm for 10 minutes, sodium sulfate was added, and the dyeing was continued for 35 minutes before draining. The weight ratio of sodium sulfate to grey cloth was 1.5:20, and sodium sulfate was added in the form of a solution with a certain concentration after adding water.

[0097] Then, the fabric was fixed for 45 seconds at a temperature of 185°C, a speed of 35 m / min, and an overfeed of 2%. Finally, the fabric was inspected and packaged, thereby obtaining fabric sample 1#.

[0098] Example 2

[0099] A single-sided four-needle circular knitting machine is used for single-sided three-needle knitting, and a minimum cycle structure is formed by three coil wales and six corresponding coil rows, and then a fabric surface is formed by several minimum cycle structures to obtain a grey fabric sample 2#. The formation of the minimum cycle structure is the same as in Example 1.

[0100] The yarn is knitted with two kinds of yarns, the yarns used in the first, third and fifth modes of the 6-mode coil row are filaments, and the yarns used in the second, fourth and sixth modes of the 6-mode coil row are cellulose yarns and elastic fibers knitted at the same time. The filaments are made of nylon, the cellulose yarns are made of linen, and the elastic fibers are made of polyolefin, and the ratio of the filaments, cellulose yarns and elastic fibers is 1:1:1.

[0101] In the single-sided three-needle knitting method, the knitting needles of the needle cylinder are three-section needles, and the needle arrangement of the needle cylinder adopts ABC cycle arrangement.

[0102] The grey cloth sample 2# is subjected to singeing, scouring, alkali reduction, dyeing, shaping, inspection and packaging.

[0103] The singeing is carried out in a gas singeing machine, and the measurement conditions of singeing are: one burner is positive and the other is negative, double-sided singeing; the vehicle speed is controlled at 110m / min; the distance between the fabric and the flame is 1.0cm; the gasoline gasification amount is 21kg / h; and the gasification temperature is 90°C.

[0104] Scouring is performed at 110°C for 45 minutes using caustic soda, oil remover, refining agent, and other scouring agents. The caustic soda is sodium hydroxide, and the amount of caustic soda added to the scouring solution is 3g / L; the oil remover is TF-101H special oil remover, and the amount of oil remover added to the scouring solution is 1.5g / L; the refining agent is a phosphate surfactant and a fatty alcohol polyoxyethylene ether compounded refining agent, and the amount of the refining agent added to the scouring solution is 1.3g / L; other scouring agents include sodium silicate and sodium bisulfite, and the amount of sodium silicate added to the scouring solution is 2.0g / L, and the amount of sodium bisulfite added to the scouring solution is 0.8g / L.

[0105] The alkali used for alkali reduction is an aqueous solution of sodium hydroxide, the concentration of the aqueous solution of sodium hydroxide is 14 g / L, the temperature of alkali reduction is 120° C., and the treatment time is 45 min.

[0106] The cellulose yarn in the grey cloth sample 2# was dyed, and the pH was adjusted after adding water, and then sulfur dye was added for heating dyeing, and then sodium sulfate was added to continue to keep warm and dyeing before draining. Among them, the weight ratio of grey cloth to water was 1:14, and the pH value of water was adjusted to 5.2. The sulfur dye with weak reducing properties was stirred evenly and then slowly added to the water within 22 minutes. The weight ratio of sulfur dye to grey cloth was 1:1.2, and it was kept warm at 27°C for 9 minutes and then slowly raised to 92°C at 1.0°C / min. After keeping warm for 12 minutes, sodium sulfate was added, and the dyeing was continued for 32 minutes before draining.

[0107] Then, the fabric was fixed for 42 seconds at a temperature of 188°C, a speed of 32 m / min, and an overfeed of 3%. Finally, the fabric was inspected and packaged, thereby obtaining fabric sample 2#.

[0108] Example 3

[0109] A single-sided four-needle circular knitting machine is used for single-sided three-needle knitting, and a minimum cycle structure is formed by three coil wales and six corresponding coil rows, and then a fabric surface is formed by several minimum cycle structures to obtain a grey fabric sample 3#. The formation of the minimum cycle structure is the same as in Example 1.

[0110] The yarn is knitted with two kinds of yarns, the yarns used in the first, third and fifth modes of the 6-mode coil row are filaments, and the yarns used in the second, fourth and sixth modes of the 6-mode coil row are cellulose yarns and elastic fibers knitted at the same time. The filaments are made of polyester, the cellulose yarns are made of lyocell, and the elastic fibers are made of polyolefin, and the ratio of the filaments, cellulose yarns and elastic fibers is 1:1:1.

[0111] In the single-sided three-needle knitting method, the knitting needles of the needle cylinder are three-section needles, and the needle arrangement of the needle cylinder adopts ABC cycle arrangement.

[0112] The grey cloth sample 3# is subjected to singeing, scouring, alkali reduction, dyeing, shaping, inspection and packaging.

[0113] The singeing is carried out in a gas singeing machine, and the measurement conditions of singeing are: one burner is positive and the other is negative, double-sided singeing; the vehicle speed is controlled at 90m / min; the distance between the fabric and the flame is 0.8cm; the gasoline gasification amount is 25kg / h; and the gasification temperature is 100℃.

[0114] Scouring is carried out at 120°C for 35 minutes using caustic soda, oil remover, refining agent, and other scouring agents. The caustic soda is sodium hydroxide, and the amount of caustic soda added to the scouring solution is 5g / L; the oil remover is TF-101H special oil remover, and the amount of oil remover added to the scouring solution is 1g / L; the refining agent is a phosphate surfactant and a fatty alcohol polyoxyethylene ether compounded refining agent, and the amount of the refining agent added to the scouring solution is 1.8g / L; other scouring agents include sodium silicate and sodium bisulfite, and the amount of sodium silicate added to the scouring solution is 2.5g / L, and the amount of sodium bisulfite added to the scouring solution is 1.2g / L.

[0115] The alkali used for alkali reduction is an aqueous solution of sodium hydroxide, the concentration of the aqueous solution of sodium hydroxide is 10 g / L, the temperature of alkali reduction is 130° C., and the treatment time is 35 min.

[0116] The cellulose yarn in the grey cloth sample 3# was dyed, and the pH was adjusted after adding water, and then sulfur dye was added for heating dyeing, and then sodium sulfate was added to continue to keep warm and dyeing before draining. Among them, the weight ratio of grey cloth to water was 1:10, and the pH value of water was adjusted to 5.8. The sulfur dye with weak reducing properties was stirred evenly and then slowly added to the water within 18 minutes. The weight ratio of sulfur dye to grey cloth was 1:0.8, and it was kept at 23℃ for 11 minutes and then slowly raised to 98℃ at 2.0℃ / min. After keeping warm for 8 minutes, sodium sulfate was added, and the dyeing was continued for 38 minutes before draining.

[0117] Then, the fabric was fixed for 47 seconds at a temperature of 182°C, a speed of 38 m / min, and an overfeed of 1%. Finally, the fabric was inspected and packaged, thereby obtaining fabric sample 3#.

[0118] Test Example 1

[0119] The fabric samples 1#-3# of Examples 1-3 have the following characteristics: Figure 1-2 The structure shown.

[0120] Specifically, if Figure 1-2As shown, the floating line structure unit formed by the first mode of the 6-mode coil row and the floating line structure unit formed by the third mode are staggered by one stitch in the longitudinal direction, and the floating line structure unit formed by the fifth mode of the 6-mode coil row and the floating line structure unit formed by the third mode are staggered by one stitch in the opposite direction in the longitudinal direction, and these floating line structure units are covered by the coil structure units of the next mode row and float on the back of the fabric, presenting a twill texture appearance. That is, the floating line structure units in the first mode, the third mode, and the fifth mode of the 6-mode coil row are respectively covered by the coils of the next mode row and float on the back of the fabric, that is, the skin-contacting side.

[0121] At the same time, on the one hand, since the yarns of the 1st, 3rd and 5th modes of the 6-mode coil horizontal row are set as filaments with a cooling effect, the floating line structural units of these three modes on the back of the fabric are in direct contact with the skin, which can better produce a cooling experience effect upon instantaneous contact.

[0122] On the other hand, the amount of yarn length required for the floating line structural unit is less than that for the looping structural unit, that is, the more looping structural units there are, the larger the transverse stretching space of the fabric is, and the better the stretching effect is, while the more floating line structural units there are, the smaller the stretchable space is, and the weaker the stretching effect is. In this test example, due to the large number of transverse floating line structural units, the transverse stretching effect of the fabric is relatively small, but in the longitudinal direction, the amount of yarn length required for the looping structural unit covering the first mode floating line structural unit in the second mode of the 6-mode coil horizontal row increases, and during longitudinal stretching, the looping structural units that are mutually intertwined provide sufficient stretching space, so the longitudinal stretching performance of the fabric is excellent. The fabric is most preferably used for garments when cut horizontally, and the warp direction of the fabric corresponds to the transverse direction of the garment, so as to achieve the optimal effect of the stretching performance of the finished product, and has very good wearing comfort.

[0123] Test Example 2

[0124] The fabric sample 1# of Example 1 was compared with a conventional woven stretch denim fabric, which was a stretch woven jeans fabric with spandex coated yarn having the same thickness as the fabric sample 1#. The two were cut into garments, and the elasticity of the garment samples was measured. The specific test results are shown in Table 2 below.

[0125] Table 2

[0126]

[0127] As can be seen from Table 2, although the traditional denim fabric has the characteristics of tight texture, thick, bright color and clear texture after shrinkage prevention. The imitation denim style knitted fabric, such as fabric sample 1# in Example 1, can achieve the visual appearance and woven texture of traditional denim through yarn selection, organizational structure, pattern design and finishing method, and is more comfortable and soft than traditional denim fabric. At the same time, at the same thickness, the weight of fabric sample 1# is 24% lighter than woven denim, and has very good lightness. In terms of elasticity, the weft stretch of fabric sample 1# on the garment is 3.75 times that of woven denim, and the warp stretch reaches 7.5 times; at the same time, fabric sample 1# also maintains a recovery rate of more than 90%, and its tensile performance is good. It can be seen that as a knitted denim fabric, fabric sample 1# is better than traditional woven stretch denim fabric in elasticity and fabric lightness.

[0128] Test Example 3

[0129] The fabric sample 1# of Example 1 was subjected to a contact coolness test. That is, the coolness property of the fabric sample 1# was measured according to the contact coolness coefficient Q-max (J / (cm 2 ·s)) test, where the contact coolness coefficient Q-max (J / (cm 2 ·s)) is based on the GB / T 35263-2017 "Testing and evaluating the instantaneous coolness of textiles". The GB / T 35263-2017 standard requires: the contact coolness coefficient of the fabric Q-max (J / (cm 2 ·s))≥0.15. The test process parameters for the fabric contact coolness coefficient test include sample carrier material: polystyrene foam, instrument model: Roaches Q-Max, test environment conditions: room temperature 20.1℃, humidity 65.0%, hot plate temperature: (35.0±0.5)℃, cold plate temperature: (20.0±0.5)℃, sample contact surface: skin contact surface. The specific test results of the contact coolness coefficient are shown in Table 3.

[0130] Table 3

[0131]

[0132]

[0133] As shown in Table 3, the five contact coolness coefficient test results and the average of fabric sample 1# are all greater than 0.15, so it meets the requirements of GB / T 35263-2017 standard, and fabric sample 1# has a cool property. Specifically, the contact surface between the cool side of fabric sample 1# and the skin is increased, which can make people feel an instant cool feeling. This is achieved by combining the looping characteristics of the knitted structure with the filament fiber with the original yarn coolness. At the same time, after testing, the contact coolness coefficient results and the average of the fabric sample after 30 washes are shown in Table 3, which are all greater than the standard requirement of 0.15. It can be seen that the fabric sample has a permanent cool effect, which solves the problem that the cool effect of ordinary fabrics treated with cool additives is not resistant to water washing.

[0134] Test Example 4

[0135] The fabric sample 1# of Example 1 was subjected to a moisture permeability test. This test simulates the ability of a textile fabric to transfer the water vapor naturally discharged from the body to the external environment after the human body sweats under different activity states. (That is, it is not stuffy to wear) Moisture permeability is the quality or efficiency of water vapor transfer on both sides of the fabric; it assesses the flow of water vapor, which comes from the water vapor emitted by the human body during exercise, and is also affected by the water vapor in the external environment. Test method: Place a moisture permeable cup filled with distilled water at a certain temperature and sealed with a fabric sample in a sealed environment with specified temperature and humidity. Under the specified temperature and humidity conditions on both sides of the sample, the mass of water vapor that passes vertically through the unit area of ​​the sample within a specified time is measured in grams per square meter hour [g / (㎡·h)]. The specific test results are shown in Table 4.

[0136] Table 4

[0137]

[0138] It can be seen from Table 4 that the moisture permeability of fabric sample 1# is more than twice that of traditional woven stretch denim. It can be seen that knitted denim is less likely to feel stuffy when worn than traditional woven stretch denim and is more comfortable.

[0139] The above is only a preferred embodiment of the present invention, and is not any formal or substantial limitation of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the method of the present invention, and these improvements and supplements should also be regarded as the protection scope of the present invention. Any technician familiar with this profession, without departing from the spirit and scope of the present invention, can make some changes, modifications and evolutions of the technical content disclosed above, which are equivalent embodiments of the present invention; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A knitted twill cool denim fabric, characterized in that: The fabric is a single-sided three-needle knitted structure, including a plurality of minimum cycle structures, each of which includes 3 wales of coils and 6 rows of coils; The structural unit formed by the first coil row and the 6-mode coil row includes: the second mode, the fourth mode, the fifth mode, and the sixth mode of the 6-mode coil row form a loop structural unit; and the first mode and the third mode of the 6-mode coil row form a floating line structural unit; The structural unit formed by the second coil wale and the 6-mode coil row includes: the first and fifth dies of the 6-mode coil row form a floating line structural unit; the second, third, fourth and sixth dies of the 6-mode coil row form a loop structural unit; The structural unit formed by the third coil column and the 6-mode coil horizontal row includes: the first die, the second die, the fourth die, and the sixth die of the 6-mode coil horizontal row form a loop structural unit; and the third die and the fifth die of the 6-mode coil horizontal row form a floating wire structural unit.

2. A method for preparing a knitted twill cool denim fabric, comprising: The yarns are used for weaving and the resulting grey fabric is then finished to provide the desired fabric.

3. The method for preparing the knitted twill cool denim fabric according to claim 2, characterized in that: The yarn is selected from at least one of filament yarn, cellulose yarn and elastic fiber.

4. The method for preparing the knitted twill cool denim fabric according to claim 3, characterized in that: The yarn comprises any one or more of the following conditions: A1) The material of the filament includes but is not limited to polyester and nylon; A2) The material of the cellulose yarn includes but is not limited to cotton, linen, viscose, and lyocell; A3) The material of the elastic fiber includes but is not limited to spandex and polyolefin; A4) The yarn is woven with two kinds of yarns, the yarns used in the first, third and fifth modes of the six-mode coil row are filaments, and the yarns used in the second, fourth and sixth modes of the six-mode coil row are cellulose yarns and elastic fibers woven at the same time.

5. The method for preparing the knitted twill cool denim fabric according to claim 2, characterized in that: The weaving is performed by using a single-sided four-needle-pass knitting circular machine to perform single-sided three-needle-pass knitting.

6. The method for preparing the knitted twill cool denim fabric according to claim 5, characterized in that: In the single-sided three-needle knitting method, the knitting needles of the needle cylinder are three-section needles, and the needle arrangement method of the needle cylinder adopts ABC cycle arrangement; And / or, the weaving adopts 3 wales of coils and 6 horizontal rows of coils to form a minimum cycle structure, and then forms a fabric surface through a plurality of minimum cycle structures to obtain a grey fabric.

7. The method for preparing the knitted twill cool denim fabric according to claim 2, characterized in that: The post-finishing process includes: singeing, scouring, alkali reduction, dyeing and shaping of the grey cloth.

8. The method for preparing the knitted twill cool denim fabric according to claim 7, characterized in that: The post-processing includes any one or more of the following conditions: B1) The singeing test conditions are as follows: one burner is on the front and the other is on the back, double-sided singeing; the vehicle speed is controlled at 80-120 m / min; the distance between the fabric and the flame is 0.8-1.0 cm; the gasoline vaporization amount is 20-25 kg / h; the vaporization temperature is ≥80°C; B2) the scouring is carried out by using caustic soda, oil remover, refining agent and other scouring agents; B3) the scouring temperature is 110-120°C; B4) The scouring time is 30-50min: B5) the alkali used in the alkali reduction is an aqueous solution of sodium hydroxide; B6) the temperature of the alkali reduction is 120-130°C; B7) the alkali reduction treatment time is 35-45min; B8) the dyeing is performed only on the cellulose yarn in the grey cloth; B9) the dyeing is to add water to the grey cloth and adjust the pH, then add the sulphur dye to heat dye, then add sodium sulfate to continue heat dyeing and then drain; B10) the setting temperature is 180-190°C; B11) the shaping speed is 30-40m / min; B12) the overfeeding of the stereotyped method is 1-3%; B13) The shaping time is 40-50s; B14) After the shaping is completed, the cloth is inspected and packaged.

9. The method for preparing the knitted twill cool denim fabric according to claim 8, characterized in that: Also includes any one or more of the following conditions: B21) In item B2), the amount of caustic soda added to the scouring solution is 3-5 g / L; B22) In item B2), the amount of the oil remover added to the scouring liquid is 1-1.5 g / L; B23) In item B2), the amount of the refining agent added to the scouring liquid is 1-2 g / L; B24) In item B2), the other scouring agents include sodium silicate and sodium bisulfite; Preferably, the amount of sodium silicate added to the scouring liquid is 1.5-3 g / L; and / or the amount of sodium bisulfite added to the scouring liquid is 0.5-1.5 g / L; B51) In item B5), the concentration of the aqueous solution of sodium hydroxide is 10-15 g / L; B91) In item B9), the weight ratio of the grey cloth to water is 1:10-15; B92) In item B9), the pH is adjusted to 5-6; B93) In item B9), the weight ratio of the sulfur dye to the grey cloth is 1:0.8-1.2; B94) In item B9), the sulfur dye is added for 18-22 min; B95) In item B9), when the sulfur dye is heated for dyeing, it is first kept at 20-30°C for 8-12 minutes, and then slowly heated to 90-100°C for 8-12 minutes; B96) In item B9), the weight ratio of sodium sulfate to grey cloth is 1 to 2:20; B97) In item B9), the time of heat preservation and dyeing is 30-40 minutes.

10. Use of the knitted twill cool denim fabric according to claim 1 in leggings.

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