Process for manufacturing a woolen pair of trousers

Abstract

The application discloses a preparation process of wool trousers, and steps of the process comprise the following steps: S1, cloth preparation; S2, western-style trousers cutting piece pretreatment, the fabric is placed on a steam platform, the cloth is pre-shrunk through steam for 24-48 hours, and the cloth is fully shrunk; S3, cloth cutting according to the required pattern of western-style trousers; S4, the front of the cut cloth is outward, sewing is carried out, and the side seam of the trousers is treated through a split sewing process; and S5, the preparation of wool trousers is completed. The wool content of the overall fabric is reduced by using non-wool fiber material for weft yarn and wool blending material with a specific blending ratio for warp yarn, so that the raw material cost is reduced. The wool texture is still maintained, the bone feeling, the drape feeling and the luster feeling of the wool trousers still exist, the wool content of the overall fabric is reduced, the price of the wool trousers can be reduced to 50% of the current conventional price, the cloth can achieve the effect of not shrinking after machine washing, the structure is not itchy, and the anti-wrinkle performance and the elasticity are good.

Description

TECHNICAL FIELD

[0001] The present application is a preparation process of wool trousers, belonging to the technical field of wool trousers preparation. BACKGROUND

[0002] Wool trousers are a kind of trousers made of wool (usually wool or wool blended fabric). They usually have the characteristics of softness, warmth and high quality.

[0003] However, the existing wool trousers have some problems. First of all, they have low elasticity. Traditional wool trousers have little elasticity, and in recent years, the addition of some spandex in wool trousers has increased some elasticity. However, based on the width of the wool factory loom, the width of the post-assembly machine, the requirements of the fabric width for the trouser cutting piece, and the inertial thinking of wool practitioners, the elasticity has not been increased much, whether it is weft or four-way elasticity, the elasticity is very small. Compared with the comfort of consumers wearing knitted and casual trousers, the elasticity of wool trousers still cannot meet the comfort required by consumers, which means that the comfort when wearing may not be as good as other materials, and it may also limit some activities.

[0004] Secondly, due to the use of high-quality fabric and process technology in the manufacturing process, and the relatively small market share, the price of these wool trousers is relatively high.

[0005] In addition, due to the characteristics of wool fabric, wool may shrink and deform after washing, which makes the trousers lose their original shape and lines, making them unable to be washed, and can only be dry cleaned, and the cost of each dry cleaning is very high. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application aims to provide a preparation process of wool trousers to solve the problems of the prior art.

[0007] In order to achieve the above-mentioned purpose, the present application is realized by the following technical scheme: a preparation process of wool trousers,

[0008] A preparation process of wool trousers, the steps of which include:

[0009] S1, fabric preparation:

[0010] S11, by mixing anti-shrinking mercerized wool and polyester fiber to form yarn, and using color-spun wool top, polyester top and spandex for twisting and plying during the manufacturing process, thereby forming polyester blended warp yarn;

[0011] S12, using core-spun yarn or TR blended yarn to prepare weft yarn to form weft yarn;

[0012] S13, using the weaving method of 2 / 1 twill weave, the warp yarn is placed on the front side and the weft yarn is placed on the back side, and the fabric is woven to form a fabric with wool on the front side and no wool on the back side;

[0013] S14, the fabric is shaped by using a flat shaping process to complete the preparation of the fabric;

[0014] S2, the trousers cutting piece pretreatment, the fabric is placed on the steam platform, and the fabric is pre-shrunk for 24-48H by steam to fully shrink the fabric;

[0015] S3, the fabric is cut according to the required pattern of the trousers;

[0016] S4, the cut fabric is placed with the front side outward, and the side seams on both sides of the trouser leg are treated by sewing and using a split seam process;

[0017] S5, the preparation of the woolen trousers is completed.

[0018] As a further improvement, in step S11, the anti-shrinking silk wool in the yarn is 42%-47% and the polyester fiber is 53%-58%, and 40D spandex is used to blend 80S / 2 wool-polyester blended warp yarn.

[0019] As a further improvement, in step S12, the core-spun yarn uses 100D core-spun 40D spandex core-spun yarn.

[0020] As a further improvement, in step S12, the TR blended yarn is 50S TR blended yarn with 40D.

[0021] As a further improvement, in step S14, the fabric is shaped by using a flat shaping process, specifically:

[0022] S141, increase the width by 2 cm before shaping;

[0023] S142, use the overfeed process to try to shrink the length direction as much as possible, and make the warp direction reach about 20% elasticity;

[0024] S143, add 3%-5% machine washable auxiliary agent and dry at 120 degrees.

[0025] As a further improvement, in step S2, the fabric is placed on the steam platform, and the fabric is pre-shrunk for 24-48H by steam to fully shrink the fabric;

[0026] Wherein, the steam size can be set to about 120 to 180 grams of water vapor discharge per minute, and the pre-shrinking temperature of the fabric is between 70℃ and 100℃.

[0027] As a further improvement, in step S3, the cloth is cut according to the required style of the trousers, and in the embodiment, the required cutting main body is four pieces of front and back pieces, and other small pieces such as waist head and lining.

[0028] The beneficial effects of the present application are:

[0029] The present application reduces the cost of raw materials by setting the non-wool fiber material for weft yarn and the wool blended material with a specific blending ratio for warp yarn. By reducing the overall wool content, the overall wool content is reduced, and the wool quality of the overall wool is maintained. The bone, drape, and luster of the wool trousers remain, but the wool content of the overall fabric is reduced, and the price of the wool trousers can be reduced to 50% of the current regular price.

[0030] The above settings allow the fabric to achieve the effect of not shrinking in machine washing, and the addition of cross-linking aids in the finishing process further stabilizes the fabric and reduces shrinkage, preventing deformation of the overall fabric after washing. After washing in the washing machine, it can be hung to dry, and it does not need to be taken to a dry cleaning shop for dry cleaning every time.

[0031] By matching the warp and weft yarns, the non-wool fiber material is used for close-to-body fabric, which is not itchy and truly not itchy in structure, permanently solving the itching problem.

[0032] At the same time, since the weft yarn uses non-wool wrinkle-resistant fiber material, the fabric has the unique senior properties of wool and wrinkle resistance, and is not wrinkled after washing and wearing, easy to care for, and meets the needs of long-term wear without wrinkles, business travel, and taking out of the suitcase without the need for ironing.

[0033] By adding spandex to the yarn, reasonable warp and weft yarn count and density, and the setting process of the finishing process, high elasticity and high recovery performance are achieved, increasing the elasticity from the conventional 7%-10% to 20%-25%, making it more comfortable to wear. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0035] Figure 1 is a step diagram of a preparation process of a wool trousers of the present application.

[0036] Figure 2 is a warp yarn test data diagram of a preparation process of a wool trousers of the present application.

[0037] Figure 3It is a weft test data chart of a wool trousers preparation process of the present application.

[0038] Figure 4 It is a detection chart of a wool trousers of the present application. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work under the premise that the scope of protection of the present application belongs to. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work under the premise that the scope of protection of the present application belongs to.

[0040] In the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can be explicitly or implicitly included one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0041] In the description of the present application, it should be noted that, unless otherwise specifically specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] There are some problems in the existing wool trousers. First of all, their elasticity is low. The traditional wool trousers have basically no elasticity. In recent years, after adding some spandex in the wool trousers, the elasticity is increased. However, based on the width of the wool factory loom, the width of the post machine, the requirement of the fabric width of the trousers cutting piece, and the inertial thinking of the wool practitioners, the elasticity has been small, whether it is weft or four-way elasticity, the elasticity is very small. Compared with the comfort of consumers wearing knitted and casual trousers, the elasticity of wool trousers still cannot reach the comfort degree required by consumers, which means that the comfort when wearing may not be as good as other materials of trousers, and it may also limit some activities.

[0043] Secondly, due to the need to use high-quality fabric and process technology in the manufacturing process, and relatively occupy less market, the price of these wool trousers is relatively high.

[0044] In addition, due to the characteristics of wool fabric, wool may shrink and deform after washing, which makes the trousers lose its original shape and lines, so it cannot be washed, and can only be dry cleaned, and the cost of each dry cleaning is also high, so in order to solve the above technical problems, the following technical solutions are disclosed:

[0045] Embodiment 1

[0046] Referring to Figures 1-4 A preparation process of wool trousers, the steps of which include:

[0047] S1, cloth preparation:

[0048] S11, by mixing 42%-47% shrink-resistant mercerized wool and 53%-58% polyester fiber to form yarn, and using color-spun wool top, polyester top and 40D spandex for twisting during the manufacturing process, thereby forming 80S / 2 wool-polyester blended warp yarn;

[0049] S12, using core-spun yarn or TR blended yarn to prepare weft yarn, specifically using 100D core-spun 40D spandex core-spun yarn or 50S core-spun 40D TR blended yarn to form weft yarn;

[0050] S13, using 2 / 1 twill weave method, placing the warp yarn on the front side and the weft yarn on the back side, and weaving to form a cloth that reflects wool on the front side and does not reflect wool on the back side;

[0051] S14, by using flat-drying process to shape the cloth, the preparation of the cloth is completed;

[0052] S2, trousers cutting pretreatment, placing the fabric on the steam platform, and pre-shrinking the cloth for 24-48H to make the cloth fully shrink;

[0053] S3, cutting the cloth according to the required pattern of the trousers;

[0054] S4, with the front side of the cut cloth facing outward, by sewing and using the split seam process to process the side seams of the trouser legs;

[0055] S5, the preparation of the wool trousers is completed.

[0056] Since the main purpose is to make a low-priced wool trousers, the warp yarn must ensure that there is enough wool, and the overall material property can be biased towards wool. Therefore, in step S11, 42%-47% of the anti-shrinkage mercerized wool is selected, and at the same time, in order to ensure the wrinkle resistance of the whole wool trousers, the wearing is not wrinkled, and it is good to manage without ironing, and the warp yarn needs more than 50% of polyester content to achieve better effect, so 53%-58% of polyester fiber is selected to make yarn, and in order to enhance the strength and elasticity of the warp yarn, colored spun wool top, polyester top and 40D spandex are used for twisting and plying during the production process, thereby forming a fine density, solid and soft 80S / 2 wool polyester blended warp yarn.

[0057] Among them, when the proportion of anti-shrinkage mercerized wool is less than 42%, the proportion of polyester fiber is greater than 58%, the final formed warp yarn has a higher elastic coefficient, and the overall material property is biased towards fiber, and when the proportion of anti-shrinkage mercerized wool is greater than 47%, the proportion of polyester fiber is less than 53%, the final formed warp yarn has a poor elastic property, and the wrinkle resistance coefficient is significantly reduced, and the cost is significantly increased, the elastic coefficient is higher, and the cost is saved, so the proportion interval of anti-shrinkage mercerized wool is set to 42%-47%, and the proportion interval of polyester fiber is set to 53%-58%.

[0058] From the above comparison, by Figure 2 It can be seen that when 35%-41% of anti-shrinkage mercerized wool and 59%-65% of polyester fiber are used in the warp yarn, and colored spun wool top, polyester top and 40D spandex are used for twisting and plying during the production process, the elastic coefficient of the warp yarn is as high as 22%-25%, the wrinkle resistance coefficient can reach 4-5 levels, and the recovery coefficient can reach 80%, but the material property is biased towards fiber, so the surface wool effect of the fabric is poor during the subsequent fabric forming.

[0059] When 48%-55% of anti-shrinkage mercerized wool and 45%-52% of polyester fiber are used in the warp yarn, and colored spun wool top, polyester top and 40D spandex are used for twisting and plying during the production process, the fabric wool effect is good, the material property is wool, the recovery coefficient can be kept at 80%, but the elasticity is reduced too much only to 15%-18%, the wrinkle resistance coefficient is reduced and unstable at 3-4 levels, and the use of anti-shrinkage mercerized wool increases the cost.

[0060] From the above comparison, by Figure 2As shown, in the present embodiment, the shrink-proof mercerized wool and polyester fiber blending ratio is 0.9:1.1, and specifically, 45% shrink-proof mercerized wool and 55% polyester fiber are blended. The warp yarn formed by the yarns of the above ratio can form obvious wool material, and the elasticity coefficient is 20%, the wrinkle resistance coefficient can be stabilized at 4 levels, and the recovery coefficient can be as high as 85%, while the shrink-proof mercerized wool is used in the least amount and the fabric performance is the most stable, so the shrink-proof mercerized wool and polyester fiber blending ratio is 0.9:1.1.

[0061] In order to ensure that the trousers are dry and do not absorb the legs, and the fabric maintains a certain bone feeling, as shown, Figure 3 The wool-polyester blended yarn with a fiber specification of 50S+40 can be used as weft yarn for preparation. When the fabric formed by the yarn is close-fitting, the wool fiber in the wool-polyester blended yarn may have a certain irritability due to the fiber characteristics. The surface of the wool fiber has a small scale structure, and these scales can irritate people with high skin sensitivity, causing itching. And for sensitive skin, some people have high sensitivity to fiber materials, especially close-fitting clothes that directly contact the skin, which is more likely to cause itching.

[0062] At the same time, the fiber roughness of the yarn is high, making the surface not smooth, easy to irritate the skin and cause discomfort. Therefore, the wool fiber in the wool-polyester blended yarn with a specification of 50S+40 may make the surface of the textile relatively rough. Itching and its elasticity coefficient is only 15% and the recovery coefficient is 75%.

[0063] In order to improve the elasticity coefficient and the recovery coefficient, 100D+40 nylon and 100D+40 spandex can be selected to blend to prepare weft yarn. Although the fabric prepared by the yarn is comfortable, the elasticity coefficient can reach 25%, and the recovery coefficient can reach 85%, but the soft synthetic fiber feeling is strong, which will cause the trousers to be close-fitting without beauty.

[0064] Therefore, in step S12 of the present embodiment, core-spun yarn is used to prepare weft yarn, and specifically, 100D core-spun 40D spandex core-spun yarn is used to form weft yarn;

[0065] When 100D core-spun 40D spandex core-spun yarn is used to prepare weft yarn, the following advantages are obtained:

[0066] Strength and durability: the outer layer of the core-spun yarn is a relatively strong fiber (such as polyester fiber), and the inner layer is an elastic fiber (such as spandex). This structure makes the yarn have high strength and durability. The 100D core-spun yarn is relatively fine in fineness, but because of the structure of the spandex fiber, it still maintains a certain strength.

[0067] Elasticity and resilience: Spandex is a high-elasticity fiber, and the spandex fibers in the inner layer give the yarn good elasticity and resilience. This makes the weft yarn have better stretchability and recovery during weaving, which helps the softness and comfort of the fabric.

[0068] Wrinkle resistance: The structure of the core-spun yarn can improve the wrinkle resistance of the yarn. The weft yarn is prone to stretching and twisting during weaving, and the fabric shows wrinkles. The addition of spandex fibers can reduce the twisting and wrinkling of the weft yarn, making the fabric more wrinkle-resistant in daily use.

[0069] Softness and comfort: The core-spun yarn of 100D core-spun 40D spandex has a finer fineness and softer fibers during spinning. This makes the weft yarn have better softness and comfort, providing a comfortable touch.

[0070] Durability: The structure of the core-spun yarn enhances the durability of the yarn. The addition of spandex fibers can improve the durability of the fabric, making the weft yarn more resistant to stretching and wear, prolonging the service life of the fabric.

[0071] In summary, using 100D core-spun 40D spandex core-spun yarn to prepare weft yarn can provide excellent strength, elasticity, wrinkle resistance, softness and durability of textiles, etc. And its elastic coefficient can reach 25%, the wrinkle resistance coefficient can be stable at 4 levels, and the recovery coefficient is as high as 85%. The prepared trousers have dry and non-absorbing legs, and the fabric maintains a certain bone feeling, and the skin-adhesive surface does not itch, and the comfort is strong.

[0072] In step S13, 2 / 1 twill weave is a specific weaving method, which means that there are two yarns on each warp line and one yarn on each weft line. This weaving method makes the yarns on the fabric show an inclined twill pattern. After weaving, the warp yarns of blended shrink-resistant and mercerized wool form a wool surface, and the weft yarns without blended shrink-resistant and mercerized wool form a non-wool intimate surface. During subsequent fabric sewing, by directing the wool surface outward and the non-wool intimate surface inward to contact the leg skin, the itching problem is solved.

[0073] Through the 2 / 1 twill weave method, the wool in the warp yarns can be well hidden in the intimate surface.

[0074] In step S14, the fabric is shaped by using a flat shaping process, specifically:

[0075] S141, increase the width of the fabric by 2 cm before shaping;

[0076] S142, using the overfeed process, the length direction is as much as possible to retract, let the warp reach about 20% elasticity; wherein, the warp retraction makes the fabric more close-fitting, and provides appropriate elasticity, makes the clothes more wearable, increasing the warp elasticity can help the fabric better resist stretching and deformation, prolongs the service life of the clothes. In addition, the retraction of the warp can also hide the relaxation or wrinkling of the fabric, so that the clothes remain flat and beautiful when wearing.

[0077] S143, add 3%-5% machine washable agent, and dry at 120 degrees.

[0078] Wherein, the width interval is 135c-140c, the width is greater than 140c, and the fabric elasticity is less than 15%. Although the hand feeling is acceptable, the elasticity is small, and the stretchability and resilience of the fabric are poor. The fabric lacks sufficient elasticity and is not easy to stretch and recover to the original shape, making it feel tight and uncomfortable when wearing, and limiting the freedom of movement. The fabric is flat and has poor texture, and the fabric lacks sufficient texture and structure, appearing flat and lifeless. The fabric may not have obvious texture, wrinkles or three-dimensional effect, making the surface look flat and dynamic, lacking rich tactile and visual effects. This flat texture may give a cheap or low-grade feeling.

[0079] When the width is less than 135c, although the elasticity can be greater than 25%, the hand feeling is soft, and the leg style of the trousers made is poor.

[0080] It should be emphasized that the setting width cannot be forcibly stretched to 150c, and the actual width of the fabric should be measured and set by 2cm to make the fabric flat. Finally, ensure that the fabric has 20-25% weft elasticity. If the elasticity is too large or too small, adjust the width again to achieve the required weft elasticity.

[0081] Adding less than 3% machine washable agent and more than 5% machine washable agent may have some adverse effects. When using less than 3% machine washable agent, the machine washability is insufficient: adding less than the recommended amount of machine washable agent may result in poor machine washability of the fabric, failing to meet the expected cleaning effect. This may cause the fabric to be easily damaged, discolored or have other quality problems during washing.

[0082] Durability decreases: adding less than the recommended amount of machine washable agent may not provide sufficient protection and enhancement, resulting in decreased durability of the fabric. This may cause wear, breakage or other damage, shortening the service life of the garment.

[0083] Poor dimensional stability: lack of sufficient agent addition may cause the fabric to change in size and shape during washing, wearing or storage. This may affect the texture and appearance of the garment, causing it to lose its original shape and style.

[0084] While using more than 5% machine washable aids, the fabric texture changes: Excessive addition of aids can change the texture and touch of the fabric, making it too hard or not breathable. This can affect the comfort and wearing of the garment.

[0085] The addition of more than the recommended amount of aids can cause an increase in residues during the washing process, and these residues can cause skin sensitivity or allergic reactions. This can have a negative impact on some users.

[0086] At the same time, excessive addition of aids can have a negative impact on the environment. Some aids may contain chemical ingredients that, if discharged in excess into water bodies or the environment, can cause damage to the ecological environment.

[0087] Therefore, in this embodiment, 3%-5% machine washable aids are selected for assistance, where a width of 140c can use 3% machine washable aids, and a width of 135c can use 5% machine washable aids.

[0088] The drying process is to make the fabric more flat and neat, and improve the appearance quality. Therefore, a drying temperature of 120 degrees can heat the fabric within a suitable range, promoting better fiber setting and fixation. In this way, the garment can maintain flatness, freshness and beauty when worn.

[0089] As mentioned above, the weft yarn uses non-wool fiber materials, and the warp yarn uses wool blended materials with specific blending ratios to reduce the overall wool content and lower raw material costs. By reducing the overall wool content, the overall wool texture is still maintained, and the bone, drape, and luster of the wool pants themselves still exist. However, the overall wool content of the fabric is reduced, and the price of wool pants can be reduced to 50% of the current regular price.

[0090] The above settings allow the fabric to achieve the effect of not shrinking after machine washing, and the addition of cross-linking aids after finishing further stabilizes the fabric and reduces shrinkage, preventing deformation of the overall fabric after washing. After wearing, the clothes can be hung to dry after washing in the washing machine, without the need to send them to a dry cleaning shop for dry cleaning each time.

[0091] Through the combination of warp and weft yarns, non-wool fiber materials are used for close-to-body surfaces, achieving a non-itchy close-to-body surface and truly solving the problem of itching permanently.

[0092] At the same time, due to the use of non-wool wrinkle-resistant fiber materials for weft yarns, the fabric has the unique senior properties of wool while also having wrinkle resistance, making it not wrinkled after wearing and washing, easy to maintain, and meeting the needs of long-term wear without wrinkles, business travel, and taking out of the suitcase without the need for ironing.

[0093] By adding spandex to the yarn, reasonable warp and weft yarn count and density, combined with the finishing process, high elasticity and high recovery performance are achieved, increasing the elasticity from the conventional 7%-10% to 20%-25%, making it more comfortable to wear.

[0094] In this embodiment, the measured wool pants contain 25-30% wool, the front contains 40-45% wool, the skin contains no wool, the weight is 175g / m2, the four-way stretch is 20% in the warp direction and 25-30% in the weft direction, and the fabric properties are low price, machine washable, non-itchy, wrinkle-resistant and easy to care, four-way stretch, high elasticity, bone, drape, and wool texture.

[0095] In step S2, the fabric is placed on the steam platform, and the fabric is fully shrunk by steam pre-shrinking for 24-48H;

[0096] In this embodiment, the steam size can be set to about 120 to 180 grams of water vapor discharge per minute, and the pre-shrinking temperature of the fabric is between 70°C and 100°C. In this embodiment, about 120 grams of water vapor discharge per minute is used for the first 5H, and the temperature is gradually increased to 100°. 5H-10H increases by about 10 grams of water vapor discharge per minute every 1 hour, and finally maintains 180 grams of water vapor discharge per minute. 8H before pre-shrinking ends, reduce the water vapor discharge per minute by about 10 grams every 1 hour, stop and let the fabric cool naturally to 70°, and complete the cooling at room temperature.

[0097] The shrinkage rate can be controlled between -1.2% and 1.0% in the shortest 24H, and the shrinkage time is controlled by the shrinkage rate. The shorter the time, the better the shrinkage rate. The longer the time, the smaller the shrinkage rate, the better the size stability of the garment and the washing shrinkage rate. However, in order to ensure production efficiency, the steam pre-shrinking time period is set to 24-48H.

[0098] In step S3, the fabric pieces are cut according to the required pattern of the pants. In this embodiment, the required cutting main body is the front and back pieces, a total of four pieces, and other small pieces such as waist, lining, etc. In other embodiments, adaptive adjustments can be made according to the different design requirements of the pattern.

[0099] In step S4, the cut cloth is sewn with the front surface wool side outward and the non-wool intimate side inward, wherein the double-needle four-thread sewing process specifically refers to: using two needles to sew the two layers of cloth opposite to each other. One needle enters the cloth from one side, and the other needle enters the cloth from the opposite side. Four threads are used for sewing. Two threads are located in front of the two needles (outside), and the other two threads are located behind the two needles (inside). In this way, a combination of one needle and one thread is formed to ensure the firmness of the sewing. Parallel sewing is performed, that is, the two needles move in a straight line and move at the same time. In this way, two parallel lines can be formed on the cloth, and four threads are involved in the formation of the sewing. The two needles are alternately inserted into the cloth and form a sewing. In this way, not only can the firmness of the sewing be increased, but also the uniform distribution of the sewing can be ensured.

[0100] It should be emphasized that the trousers after completing the sewing need to be further processed by the split sewing process to further process the trousers. The split sewing process is mainly aimed at the two side seams of the trousers. The split sewing process is used in wool trousers to ensure that the entire trousers are smooth and wrinkle-free, and the sewing of other parts is normal.

[0101] Example 2

[0102] This embodiment is basically the same as example 1, except that in step S12, TR blended yarn with 50S core 40D is used to prepare weft yarn.

[0103] When using TR blended yarn with 50S core 40D to prepare weft yarn, the following advantages are obtained:

[0104] Softness and comfort: TR blended yarn is usually blended from polyester and wool, which makes the yarn have good softness and comfort. The addition of wool in the fiber gives the yarn a soft touch, while the addition of polyester increases the durability of the yarn.

[0105] Durability: Polyester is a synthetic fiber with excellent durability and wear resistance, which can increase the durability of the yarn. The addition of polyester to TR blended yarn makes the weft yarn more resistant to stretching and wear during weaving, prolonging the service life of the fabric.

[0106] Wrinkle resistance: TR blended yarn has good wrinkle resistance. This yarn is easy to form a smooth fabric surface during weaving, reducing the occurrence of wrinkles, making the fabric more wrinkle-resistant in daily use.

[0107] Shape stability: TR blended yarn has good shape stability and is not easy to deform. The weft yarn maintains good tension and structure during weaving, making the fabric maintain flatness and stability.

[0108] Easy care: the weft fabric made of TR blended yarn generally has good shrinkage resistance and anti-crease performance, and is easy to care. This means that the fabric is not easy to shrink and deform during washing and drying, making it convenient for daily cleaning and maintenance.

[0109] In summary, the TR blended yarn with 50S core-spun 40D can provide good softness, comfort, durability, wrinkle resistance and easy care of textiles and other advantages. And its elastic coefficient can reach 20%, the anti-crease coefficient can be stable at 4 levels, the recovery coefficient is as high as 80%, the prepared trousers depend on the leg, the fabric keeps a certain bone feeling, and the skin fitting surface does not itch, and the comfort is stronger.

[0110] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A process for making a woolen pair of trousers, characterized in that, The steps include: S1, cloth preparation: S11, yarn is prepared by blending anti-shrinking mercerized wool and polyester fibers, and twisting and plying with color-spun wool top, polyester top and spandex during production, so as to form polyester blended warp yarn; Among them, the anti-shrinking mercerized wool is 42%-47%, the polyester fiber is 53%-58%, and 40D spandex is added to form 80S / 2 wool-polyester blended warp yarn; S12, weft yarn is prepared by using core-spun yarn or TR blended yarn to form weft yarn; Among them, the core-spun yarn is a core-spun yarn of 100D core-spun 40D spandex S13, using 2 / 1 twill weave, the warp yarn is placed on the front side and the weft yarn is placed on the back side, and the cloth is woven to form a cloth with wool on the front side and no wool on the back side; S14, the cloth is shaped by flat shaping process to complete the preparation of the cloth; Among them, the shaping width is increased by 2 cm, the overfeed process makes the warp elasticity reach 20%, 3%-5% machine washable auxiliary agent is added, and drying is carried out at 120℃; S2, trousers cutting piece pretreatment, the fabric is placed on the steam platform, and the fabric is pre-shrunk by steam for 24-48H to make the fabric fully shrink; Among them, when steam pre-shrinking: the steam amount is 120g / min in the first 5 hours, and gradually increases to 180g / min; 8 hours before the end, gradually reduce the temperature to 70℃; The total time is 24-48 hours; S3, cutting the cloth according to the required pattern of the trousers; S4, the cut cloth is outwardly, and the side seams on both sides of the trouser leg are treated by sewing and using split seam process; S5, the preparation of the overcoat trousers is completed.

2. A process for making a woolen western style pant according to claim 1, wherein, In step S12, the TR blended yarn is a 50S core-spun 40D TR blended yarn.

3. A process for making a woolen western style pant according to claim 1, wherein, In step S2, the steam size is set to 120 to 180 grams of water vapor discharge per minute, and the pre-shrinking temperature of the cloth is between 70℃ and 100℃.

4. The process according to claim 1, wherein, In step S3, the cloth is cut according to the required pattern of the trousers, and the required cutting main body is four pieces of front and back pieces.

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