Fabric shrinkage rate rapid setting method

Abstract

The invention relates to the technical field of fabric setting, in particular to a fabric shrinkage rate rapid setting method, and aims to solve the problems that the production cycle is prolonged, the production efficiency is greatly reduced, the fabric setting effect is poor, the energy and raw material consumption is large and the like due to long setting time in the prior art. According to the original area of the fabric, taking a corresponding area for analysis; compared with a traditional shaping method, the rapid shaping method adopting the shrinkage rate has the advantages that the shaping time can be remarkably shortened, the production efficiency can be improved, the production cycle can be shortened, the consumption of energy and raw materials can be reduced, and the production cost can be greatly reduced; by optimizing the formula, equipment and process parameters, researching the physicochemical properties of the fabric and selecting the optimal temperature for fabric setting, the stable and consistent fabric setting effect is realized, and the quality stability of the product is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fabric shaping, in particular to a method for quickly shaping fabric shrinkage. Background Art

[0002] Setting refers to the process of improving the appearance and intrinsic quality of textiles, improving the wearing performance or other application performance of textiles, or some special functions through physical, chemical, or physical and chemical methods, as well as biological methods. After the fabric is woven into a finished product, in order to make the fabric have some special uses, the fabric will be set. Because the physical and chemical properties of the fabric are relatively stable after setting. The purpose of setting is to relax the stress of the stretched fiber, which is beneficial to improve the crystallinity of the fiber and the stability of various properties, reduce its boiling water shrinkage, standardize the fabric, make the fabric width consistent and the size shape stable, improve the fabric feel, make it soft, stiff and plump, improve the appearance quality of the fabric, enhance the gloss, whiteness, nap and fluff, give the fabric new functions, and carry out special finishing such as waterproof, fireproof, antibacterial, anti-ultraviolet finishing, etc.

[0003] Existing fabric shaping technologies are generally divided into dry and wet types. Dry heat shaping technology is that the fabric is heated by hot air in a heating chamber, the seal is pulled to a certain size, and then cooled after leaving the heating chamber, so that the temperature drops to the glass transition temperature of the fiber, thereby obtaining a stable size. For example, for fabrics such as polyester, the temperature is generally 180-210℃ and the time is 20-30s. Wet heat shaping is divided into hot water bath and steaming. Hot water bath is to treat the fabric in boiling water or high-pressure cylinder, while steaming is to wind the fabric on a perforated roller and steam it with steam. Nylon fabrics are often shaped by wet heat, and the temperature is 125-135℃ in a high-pressure cylinder for 20-30min. However, there are disadvantages such as long shaping time and poor shaping effect, which greatly increases the production cost of enterprises. Therefore, we propose a method for rapid shaping of fabric shrinkage rate, which analyzes and optimizes unique parameters such as fabric material, yarn density, and fabric structure to achieve a fast and stable fabric shaping effect. Summary of the invention

[0004] The purpose of the present invention is to solve the problems of the prior art that the shaping time is long, thus leading to an extended production cycle, greatly reduced production efficiency, poor fabric shaping effect, large energy and raw material consumption, etc., and to propose a method for quickly shaping the fabric shrinkage rate.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A method for quickly setting the shrinkage rate of a fabric comprises the following steps:

[0007] S1: Take samples from the whole piece of fabric and analyze the corresponding area according to the original area of ​​the fabric;

[0008] S2: Determine the front and back sides of the fabric according to the front and back characteristics of the fabric;

[0009] S3: Use direct counting method to measure the warp and weft yarn density of the fabric;

[0010] S4: mark the warp and weft lengths of the sample, take their average values, and calculate the shrinkage values ​​of the warp and weft yarns;

[0011] S5: heat setting the fabric, adjusting the heating chamber to the required temperature, and overfeeding in the warp direction;

[0012] S6: Through indirect heating, the fabric is sent into the heating chamber through a pipe, and the preheating time is shortened or extended according to the characteristics of the fabric.

[0013] Preferably, in S1, when sampling from a whole piece of fabric, the distance from the sample to the edge of the fabric is not less than 5 cm, and the distance from the two ends is not less than 1.5-3 m on cotton fabric; not less than 3 m on wool fabric; about 3.5-5 m on silk fabric, and the sample has no obvious defects and is in its original natural state.

[0014] Preferably, in S1, the fabric sample of simple structure is 15cm×15cm, the colored fabric with larger structure cycle is 20cm×20cm, and the fabric with large color cycle is the area occupied by one colored yarn cycle; for large jacquard, the analysis part is 20cm×20cm and 25cm×25cm; when the sample size is small, 6cm×5.5cm is taken for analysis.

[0015] Preferably, in S2, when analyzing the fabric sample, the front and back sides of the fabric are first determined, wherein the pattern and color of the front side of the fabric are clearer and more beautiful than those of the back side; for convex and concave fabrics, the front side is tight and delicate, with stripes and pattern convex patterns, while the back side is rougher and has longer floating lines; for single-sided raised fabrics, the raised side is the front side of the fabric; for double-sided raised fabrics, the side with clean and neat fluff is the front side; the side with clean and neat edges is the front side; for leno fabrics, the side with clear patterns and prominent warps is the front side; for towel fabrics, the side with high terry density is the front side.

[0016] Preferably, in S3, the warp and weft yarn density of the fabric is determined by direct counting method with the help of a fabric density analysis mirror. The scale length of the fabric density analysis mirror is 5 cm. Under the analysis lens, a long glass sheet is engraved with a red line. When analyzing the fabric density, the lens is moved to align the red line on the glass sheet and the red line on the scale between two spinning threads. Taking this as the starting point, the number of spinning threads is counted while moving the lens until the 5 cm scale line is reached; the output number of spinning threads is multiplied by 2, which is the density value of 10 cm fabric.

[0017] Preferably, in S4, the shrinkage is determined by taking a 10 cm length of fabric along the warp and weft vectors at the edge of the sample and marking it, shortening the yarn tassels at the edge, and then gently pulling the warp and weft yarns out of the sample, pressing one end of the yarn with a finger, and gently straightening the yarn with the other hand, and measuring the length of the warp and weft yarns between the marks with a ruler. After making ten consecutive numbers in this way, take the average value and calculate the shrinkage values ​​of the warp and weft yarns.

[0018] Preferably, in S5, the fabric is heat-set. During the setting process, the heating chamber is adjusted to the required temperature. When the fabric enters the heating chamber, it is overfed in the warp direction and gradually stretched in the weft direction by tying the edge of the fabric with two strings of needle clip chains. The high-temperature hot air ejected from the air nozzles of the upper and lower air ducts performs convection heating on the fabric. After the fabric is heated to a specified temperature, it is treated at this temperature for a period of time, guided out of the heating chamber, and dropped after cooling. An automatic edge glue coating device is provided in the fabric inlet area. When the knitted fabric is fed into the fabric, the automatic edge glue coating device coats 3 cm wide quick-drying glue on the edge of the fabric, and the edge of the fabric becomes stiff and smooth. An automatic weft straightening device is provided in the fabric inlet area of ​​the heat setting machine.

[0019] Preferably, in S5, an overfeeding needle device is provided to make the fabric feeding speed greater than the running speed of the needle clip chain. The overspeed feeding reduces the warp tension of the fabric and expands the fabric in the weft direction. Before the fabric enters the needle clip chain, it first passes through the overfeeding roller, and then passes through a set of three-finger stripping devices on the left and right to remove wrinkles and flatten the fabric. The active brush cloth pressing wheel brushes the two edges of the fabric onto the needle plate between the flexible supporting belt composed of the active brush cloth pressing wheel and two small guide rollers, and then the passive brush cloth pressing wheel continues to press the fabric deeply onto the fine needles to prevent it from falling off. When used for overfeeding, the linear speed of the active cloth pressing wheel is slightly greater than the linear speed of the overfeeding roller, and the active brush cloth pressing wheel is adjusted to be slightly greater than the linear speed of the overfeeding roller.

[0020] Preferably, in S6, 26.5% of biphenyl and 73.5% of diphenyl ether are mixed as a heat carrier through indirect heating to heat the oil to a gaseous state, and then sent into the heating chamber through a pipeline; in the process of being sent into the heating chamber, the gaseous oil is gradually condensed into liquid for recycling, and the heated air is sent into the room through a fan outside the heating chamber to achieve a heating effect.

[0021] Preferably, in S6, the fabric needs to go through a certain preheating time before it can reach the heat-setting temperature after entering the heating chamber. The distance that the fabric surface temperature goes through to rise to the required temperature is called the preheating zone, and the corresponding time is the preheating time; the distance from the fabric exiting the preheating zone to the exit of the heating chamber is called the setting zone, and the corresponding time is the setting time; heat-setting time = preheating time + setting time; the setting time of fabrics with high elasticity is longer than that of other chemical fiber fabrics, and its preheating time is shortened; for fabrics with high color fastness requirements, the setting time requirement is shortened.

[0022] The beneficial effects of the present invention are:

[0023] 1. Use the shrinkage rate rapid shaping method to improve the dimensional stability of the fabric, improve the feel and appearance, improve the washability, improve the dimensional stability of the fabric, significantly shorten the shaping time, and improve product quality.

[0024] 2. Measure the shrinkage of warp and weft yarns to determine the structural characteristics of the fabric; adjust the fabric according to the structural characteristics of the fabric to change the shrinkage of warp and weft yarns and the warp and weft fineness; the measurement of the shrinkage of warp and weft yarns and the warp and weft fineness is an important parameter of the fabric structural characteristics. Through the study of the physical and chemical properties of the fabric, the fabric can be quickly set, the fabric setting cycle is shortened, and the production efficiency of the enterprise is improved.

[0025] The purpose of the present invention is to adopt a rapid shrinkage setting method. Compared with the traditional setting method, the setting time can be significantly shortened, the production efficiency can be improved, and the production cycle can be reduced. The rapid setting method reduces the consumption of energy and raw materials and greatly reduces the production cost. By optimizing the formula, equipment and process parameters, the shrinkage of warp and weft yarns is measured to determine the structural characteristics of the fabric. By studying the physical and chemical properties of the fabric, the optimal temperature for fabric setting is selected to achieve a stable and consistent fabric setting effect, thereby improving the quality stability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The present invention is a schematic flow chart of a method for quickly finalizing fabric shrinkage. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] Embodiment 1

[0029] Reference Figure 1 , a method for quickly setting the shrinkage rate of a fabric, comprising the following steps:

[0030] S1: Take samples from the whole piece of fabric and analyze the corresponding area according to the original area of ​​the fabric;

[0031] S2: Determine the front and back sides of the fabric according to the front and back characteristics of the fabric;

[0032] S3: Use direct counting method to measure the warp and weft yarn density of the fabric;

[0033] S4: mark the warp and weft lengths of the sample, take their average values, and calculate the shrinkage values ​​of the warp and weft yarns;

[0034] S5: heat setting the fabric, adjusting the heating chamber to the required temperature, and overfeeding in the warp direction;

[0035] S6: Through indirect heating, the fabric is sent into the heating chamber through a pipe, and the preheating time is shortened or extended according to the characteristics of the fabric.

[0036] In this embodiment, when sampling from a whole piece of fabric, the distance from the sample to the edge of the fabric is not less than 5 cm, and the distance from the two ends is 1.5 m on cotton fabric, not less than 3 m on wool fabric, and 3.5 m on silk fabric. The sample has no obvious defects and is in its original natural state.

[0037] In this embodiment, the fabric sample of simple structure is 15cm×15cm, the colored fabric with larger structure cycle is 20cm×20cm, and the fabric with large color cycle is the area occupied by one colored yarn cycle; for large jacquard, the analysis part is 20cm×20cm; when the sample size is small, 6cm×5.5cm is taken for analysis.

[0038] In this embodiment, when analyzing the fabric sample, the front and back sides of the fabric are first determined, wherein the pattern and color of the front side of the fabric are clearer and more beautiful than those of the back side; for convex and concave fabrics, the front side is tight and delicate, with stripes and pattern convex patterns, while the back side is rougher and has longer floating lines; for single-sided raised fabrics, the raised side is the front side of the fabric; for double-sided raised fabrics, the side with clean and neat pile is the front side; the side with clean and neat edges is the front side; for leno fabrics, the side with clear patterns and prominent warps is the front side; for towel fabrics, the side with high terry density is the front side.

[0039] In this embodiment, the warp and weft yarn density of the fabric is determined by direct counting method with the help of a fabric density analyzer. The fabric density analyzer has a scale length of 5 cm. Under the analysis lens, a long glass sheet is engraved with a red line. When analyzing the fabric density, the lens is moved to align the red line on the glass sheet and the red line on the scale between two spinning threads. Taking this as the starting point, the number of spinning threads is counted while the lens is moved until the 5 cm scale line is reached. The output number of spinning threads multiplied by 2 is the density value of 10 cm fabric.

[0040] In this embodiment, the shrinkage rate is determined by taking a 10 cm length of fabric along the warp and weft vectors at the edge of the sample and marking it. The yarn tassels at the edge are cut short, and then the warp and weft yarns are gently pulled out of the sample. One end of the yarn is pressed with a finger, and the other hand is used to gently straighten the yarn. The length of the warp and weft yarns between the marks is measured with a ruler. After making ten consecutive numbers in this way, the average value is taken to calculate the shrinkage value of the warp and weft yarns.

[0041] In this embodiment, the fabric is heat-set. During the setting process, the heating chamber is adjusted to the required temperature. When the fabric enters the heating chamber, it is overfed in the warp direction and gradually stretched in the weft direction by tying the edge of the fabric with two strings of needle clip chains. The high-temperature hot air ejected from the air nozzles of the upper and lower air ducts performs convection heating on the fabric. After the fabric is heated to the specified temperature, it is treated at this temperature for a period of time, guided out of the heating chamber, and dropped after cooling. An automatic edge glue coating device is provided in the fabric inlet area. When the knitted fabric is fed in, the automatic edge glue coating device coats 3 cm wide quick-drying glue on the edge of the fabric, and the edge of the fabric becomes stiff and smooth. An automatic weft straightening device is provided in the fabric inlet area of ​​the heat setting machine.

[0042] In this embodiment, an overfeed needle device is provided to make the fabric feeding speed greater than the running speed of the needle clip chain. Overfeeding reduces the warp tension of the fabric and expands the fabric in the weft direction. Before the fabric enters the needle clip chain, it first passes through the overfeed roller, and then passes through a set of three-finger stripping devices on the left and right to remove wrinkles and flatten the fabric. The active brush cloth pressing wheel brushes the two edges of the fabric onto the needle plate between the flexible supporting belt composed of the active brush cloth pressing wheel and two small guide rollers, and then the passive brush cloth pressing wheel continues to press the fabric deeply onto the fine needles to prevent it from falling off. When used for overfeeding, the linear speed of the active cloth pressing wheel is slightly greater than the linear speed of the overfeed roller, and the active brush cloth pressing wheel is adjusted to be slightly greater than the linear speed of the overfeed roller.

[0043] Embodiment 2

[0044] Reference Figure 1 , a method for quickly setting the shrinkage rate of a fabric, comprising the following steps:

[0045] S1: Take samples from the whole piece of fabric and analyze the corresponding area according to the original area of ​​the fabric;

[0046] S2: Determine the front and back sides of the fabric according to the front and back characteristics of the fabric;

[0047] S3: Use direct counting method to measure the warp and weft yarn density of the fabric;

[0048] S4: mark the warp and weft lengths of the sample, take their average values, and calculate the shrinkage values ​​of the warp and weft yarns;

[0049] S5: heat setting the fabric, adjusting the heating chamber to the required temperature, and overfeeding in the warp direction;

[0050] S6: Through indirect heating, the fabric is sent into the heating chamber through a pipe, and the preheating time is shortened or extended according to the characteristics of the fabric.

[0051] In this embodiment, when sampling from a whole piece of fabric, the distance from the sample to the edge of the fabric is not less than 5 cm, and the distance from the two ends is not less than 2 m on cotton fabric, not less than 3 m on wool fabric, and about 4 m on silk fabric. The sample has no obvious defects and is in its original natural state.

[0052] In this embodiment, the fabric sample of simple structure is 15cm×15cm, the colored fabric with larger structure cycle is 20cm×20cm, and the fabric with large color cycle is the area occupied by one colored yarn cycle; for large jacquard, the analysis part is 20cm×20cm; when the sample size is small, 6cm×5.5cm is taken for analysis.

[0053] In this embodiment, when analyzing the fabric sample, the front and back sides of the fabric are first determined, wherein the pattern and color of the front side of the fabric are clearer and more beautiful than those of the back side; for double-sided raised pile fabric, the side with clean and neat pile is the front side; for clean and neat edges, the side with clear and prominent warps is the front side; for leno fabric, the side with clear patterns and prominent warps is the front side; for towel fabric, the side with high terry density is the front side.

[0054] In this embodiment, the warp and weft yarn density of the fabric is determined by direct counting method using a fabric density analysis mirror. When analyzing the fabric density, the lens is moved to align the red line on the glass sheet and the red line on the scale between two spinning threads. Taking this as the starting point, the number of spinning threads is counted while moving the lens until the 5 cm scale line is reached. The output number of spinning threads is multiplied by 2, which is the density value of 10 cm fabric.

[0055] In this embodiment, the shrinkage rate is determined by taking a 10 cm length of fabric along the warp and weft vectors at the edge of the sample and marking it. The yarn tassels at the edge are cut short, and the yarn is gently straightened with the other hand. The length of the warp and weft yarns between the marks is measured with a ruler. After making ten consecutive numbers in this way, the average value is taken to calculate the shrinkage value of the warp and weft yarns.

[0056] In this embodiment, the fabric is heat-set. During the setting process, the heating chamber is adjusted to the required temperature. When the fabric enters the heating chamber, it is overfed in the warp direction. An automatic fabric edge gluing device is provided in the fabric inlet area. When the knitted fabric is fed, the automatic fabric edge gluing device applies 3 cm wide quick-drying glue on the fabric edge, and the fabric edge becomes stiff and smooth. An automatic weft straightening device is provided in the fabric inlet area of ​​the heat setting machine.

[0057] In this embodiment, an overfeed needle device is provided to make the fabric feeding speed greater than the running speed of the needle clip chain. Overspeed feeding reduces the warp tension of the fabric. The active brush cloth pressing wheel brushes the two edges of the fabric onto the needle plate through the flexible supporting belt composed of the active brush cloth pressing wheel and two small guide rollers, and then the passive brush cloth pressing wheel continues to press the fabric deeply onto the fine needles to prevent it from falling off. When used for overfeeding, the linear speed of the active cloth pressing wheel is slightly greater than the linear speed of the overfeed roller, and the active brush cloth pressing wheel is adjusted to be slightly greater than the linear speed of the overfeed roller.

[0058] Embodiment 3

[0059] Reference Figure 1 , a method for quickly setting the shrinkage rate of a fabric, comprising the following steps:

[0060] S1: Take samples from the whole piece of fabric and analyze the corresponding area according to the original area of ​​the fabric;

[0061] S2: Determine the front and back sides of the fabric according to the front and back characteristics of the fabric;

[0062] S3: Use direct counting method to measure the warp and weft yarn density of the fabric;

[0063] S4: mark the warp and weft lengths of the sample, take their average values, and calculate the shrinkage values ​​of the warp and weft yarns;

[0064] S5: heat setting the fabric, adjusting the heating chamber to the required temperature, and overfeeding in the warp direction;

[0065] S6: Through indirect heating, the fabric is sent into the heating chamber through a pipe, and the preheating time is shortened or extended according to the characteristics of the fabric.

[0066] In this embodiment, when sampling from a whole piece of fabric, the distance from the sample to the edge of the fabric is not less than 5 cm, and the distance from the two ends is not less than 2.5 m on cotton fabric, not less than 3 m on wool fabric, and about 4 m on silk fabric. The sample has no obvious defects and is in its original natural state.

[0067] In this embodiment, the fabric sample of simple structure is 15cm×15cm, the colored fabric with larger structure cycle is 20cm×20cm, and the fabric with large color cycle is the area occupied by one colored yarn cycle; for large jacquard, the analysis part is 20cm×20cm; when the sample size is small, 6cm×5.5cm is taken for analysis.

[0068] In this embodiment, when analyzing the fabric sample, the front and back sides of the fabric are first determined, wherein the pattern and color of the front side of the fabric are clearer and more beautiful than those of the back side; for convex and concave fabrics, the front side is tight and delicate, with stripes and pattern convex patterns, while the back side is rougher and has longer floating lines; for single-sided raised fabrics, the raised side is the front side of the fabric; for double-sided raised fabrics, the side with clean and neat pile is the front side; the side with clean and neat edges is the front side; for leno fabrics, the side with clear patterns and prominent warps is the front side; for towel fabrics, the side with high terry density is the front side.

[0069] In this embodiment, the warp and weft yarn density of the fabric is determined by direct counting method using a fabric density analysis mirror. When analyzing the fabric density, the lens is moved to align the red line on the glass sheet and the red line on the scale between two spinning threads. Taking this as the starting point, the number of spinning threads is counted while moving the lens until the 5 cm scale line is reached.

[0070] In this embodiment, the shrinkage rate is determined by taking a 10 cm length of fabric along the warp and weft vectors at the edge of the sample and marking it. The length of the warp and weft yarns between the marks is measured with a ruler. After making ten consecutive numbers, the average value is taken to calculate the shrinkage value of the warp and weft yarns.

[0071] In this embodiment, the fabric is heat-set. During the setting process, the heating chamber is adjusted to the required temperature. When the fabric enters the heating chamber, it is overfed in the warp direction. After the fabric is heated to the specified temperature, it is treated at this temperature for a period of time, guided out of the heating chamber, and dropped after cooling. An automatic fabric edge gluing device is provided in the fabric inlet area. When the knitted fabric is fed into the fabric, the automatic fabric edge gluing device applies 3 cm wide quick-drying glue on the fabric edge, and the fabric edge becomes stiff and flat. An automatic weft straightening device is provided in the fabric inlet area of ​​the heat setting machine.

[0072] In this embodiment, an overfeed needle device is provided to make the fabric feeding speed greater than the running speed of the needle clip chain. The overspeed feeding reduces the warp tension of the fabric and expands the fabric in the weft direction. Before the fabric enters the needle clip chain, it first passes through the overfeed roller, and the two edges of the fabric are brushed onto the needle plate by the active brush cloth pressing wheel, and then the passive brush cloth pressing wheel continues to press the fabric deeply onto the fine needles to prevent it from falling off. When used for overfeeding, the linear speed of the active cloth pressing wheel is slightly greater than the linear speed of the overfeed roller, and the active brush cloth pressing wheel is adjusted to be slightly greater than the linear speed of the overfeed roller.

[0073] Embodiment 4

[0074] Reference Figure 1 , a method for quickly setting the shrinkage rate of a fabric, comprising the following steps:

[0075] S1: Take samples from the whole piece of fabric and analyze the corresponding area according to the original area of ​​the fabric;

[0076] S2: Determine the front and back sides of the fabric according to the front and back characteristics of the fabric;

[0077] S3: Use direct counting method to measure the warp and weft yarn density of the fabric;

[0078] S4: mark the warp and weft lengths of the sample, take their average values, and calculate the shrinkage values ​​of the warp and weft yarns;

[0079] S5: heat setting the fabric, adjusting the heating chamber to the required temperature, and overfeeding in the warp direction;

[0080] S6: Through indirect heating, the fabric is sent into the heating chamber through a pipe, and the preheating time is shortened or extended according to the characteristics of the fabric.

[0081] In this embodiment, when sampling from a whole piece of fabric, the distance from the sample to the edge of the fabric is not less than 5 cm, and the distance from the two ends is not less than 2.5 m on cotton fabric, not less than 3 m on wool fabric, and about 4 m on silk fabric. The sample has no obvious defects and is in its original natural state.

[0082] In this embodiment, the fabric sample of simple structure is 15cm×15cm, the colored fabric with larger structure cycle is 20cm×20cm, and the fabric with large color cycle is the area occupied by one colored yarn cycle; for large jacquard, the analysis part is 20cm×20cm; when the sample size is small, 6cm×5.5cm is taken for analysis.

[0083] In this embodiment, when analyzing the fabric sample, the front and back sides of the fabric are first determined, wherein the pattern on the front side of the fabric has longer floating lines; for single-sided raised fabric, the raised side is the front side of the fabric; for double-sided raised fabric, the side with clean and neat pile is the front side; the side with clean and neat edges is the front side of the fabric; for gauze fabric, the side with clear patterns and prominent warps is the front side of the fabric; for towel fabric, the side with a high density of terry is the front side.

[0084] In this embodiment, the warp and weft yarn density of the fabric is determined by direct measurement method using a fabric density analyzer. The fabric density analyzer has a scale of 5 cm in length. Under the analysis lens, a long glass sheet is engraved with a red line. The number of spinning threads is counted while the lens is moved until the 5 cm scale line is reached. The output number of spinning threads multiplied by 2 is the density value of 10 cm of fabric.

[0085] In this embodiment, the shrinkage is measured by taking a 10 cm length of fabric along the warp and weft vectors at the edge of the sample and marking it. The yarn tassels at the edge are cut short, and then the warp and weft yarns are gently pulled out of the sample. One end of the spinning line is pressed with a finger, and the average value is taken to calculate the shrinkage values ​​of the warp and weft yarns.

[0086] In this embodiment, the fabric is heat-set. During the setting process, the heating chamber is adjusted to the required temperature. When the fabric enters the heating chamber, it is overfed in the warp direction and gradually stretched in the weft direction by tying the edge of the fabric with two strings of needle clip chains. High-temperature hot air is ejected from the air nozzles of the upper and lower air ducts. An automatic edge gluing device is set in the fabric inlet area. When the knitted fabric is fed in, the automatic edge gluing device coats 3 cm wide quick-drying glue on the edge of the fabric, and the edge of the fabric becomes stiff and smooth. An automatic weft straightening device is set in the fabric inlet area of ​​the heat setting machine.

[0087] In this embodiment, an overfeed needle device is provided to make the fabric feeding speed greater than the running speed of the needle clip chain. Overspeed feeding reduces the warp tension of the fabric and expands the fabric in the weft direction. The two edges of the fabric are brushed onto the needle plate by the active brush cloth pressing wheel, and then the passive brush cloth pressing wheel continues to press the fabric deeply onto the fine needle to prevent it from falling off. When used for overfeeding, the linear speed of the active cloth pressing wheel is slightly greater than the linear speed of the overfeed roller, and the active brush cloth pressing wheel is adjusted to be slightly greater than the linear speed of the overfeed roller.

[0088] Embodiment 5

[0089] Reference Figure 1, a method for quickly setting the shrinkage rate of a fabric, comprising the following steps:

[0090] S1: Take samples from the whole piece of fabric and analyze the corresponding area according to the original area of ​​the fabric;

[0091] S2: Determine the front and back sides of the fabric according to the front and back characteristics of the fabric;

[0092] S3: Use direct counting method to measure the warp and weft yarn density of the fabric;

[0093] S4: mark the warp and weft lengths of the sample, take their average values, and calculate the shrinkage values ​​of the warp and weft yarns;

[0094] S5: heat setting the fabric, adjusting the heating chamber to the required temperature, and overfeeding in the warp direction;

[0095] S6: Through indirect heating, the fabric is sent into the heating chamber through a pipe, and the preheating time is shortened or extended according to the characteristics of the fabric.

[0096] In this embodiment, when sampling from a whole piece of fabric, the distance from the sample to the edge of the fabric is not less than 5 cm, and the distance from the two ends is not less than 3 m on cotton fabric, not less than 3 m on wool fabric, and about 5 m on silk fabric. The sample has no obvious defects and is in its original natural state.

[0097] In this embodiment, the fabric sample of simple structure is 15cm×15cm, the colored fabric with larger structure cycle is 20cm×20cm, and the fabric with large color cycle is the area occupied by one colored yarn cycle; for large jacquard, the analysis part is 20cm×20cm; when the sample size is small, 6cm×5.5cm is taken for analysis.

[0098] In this embodiment, when analyzing the fabric sample, the front and back sides of the fabric are first determined, wherein the pattern and color of the front side of the fabric are clearer and more beautiful than those of the back side; for convex and concave fabrics, the front side is tight and delicate, with stripes and pattern convex patterns, while the back side is rougher and has longer floating lines; for single-sided raised fabrics, the raised side is the front side of the fabric; for double-sided raised fabrics, the side with clean and neat fluff is the front side; the side with clean and neat edges is the front side of the fabric.

[0099] In this embodiment, the warp and weft yarn density of the fabric is determined by direct measurement method using a fabric density analyzer. The fabric density analyzer has a scale of 5 cm in length. Under the analysis lens, a long glass sheet is engraved with a red line. The number of spinning threads is counted while the lens is moved until the 5 cm scale line is reached. The output number of spinning threads multiplied by 2 is the density value of 10 cm of fabric.

[0100] In this embodiment, the shrinkage rate is determined by taking a 10 cm length of fabric along the warp and weft vectors at the edge of the sample and marking it. The yarn tassels at the edge are cut short, and then the warp and weft yarns are gently pulled out of the sample. One end of the yarn is pressed with a finger, and the other hand is used to gently straighten the yarn. The length of the warp and weft yarns between the marks is measured with a ruler. After making ten consecutive numbers in this way, the average value is taken to calculate the shrinkage value of the warp and weft yarns.

[0101] In this embodiment, the fabric is heat-set. During the setting process, the heating chamber is adjusted to the required temperature. When the fabric enters the heating chamber, an automatic fabric edge gluing device is set in the fabric inlet area. When the knitted fabric is fed into the fabric, the automatic fabric edge gluing device applies 3 cm wide quick-drying glue on the fabric edge, and the fabric edge becomes stiff and flat. An automatic weft straightening device is set in the fabric inlet area of ​​the heat setting machine.

[0102] In this embodiment, an overfeed needle device is provided to make the fabric feeding speed greater than the running speed of the needle clip chain. Overspeed feeding reduces the warp tension of the fabric and expands the fabric in the weft direction. When used for overfeeding, the linear speed of the active cloth pressing wheel is slightly greater than the linear speed of the overfeed roller, and the active brush cloth pressing wheel is adjusted to be slightly greater than the linear speed of the overfeed roller.

[0103] Experimental example

[0104] The fabric shrinkage rapid setting method of Example 1, Example 2, Example 3, Example 4 and Example 5 was tested, and the results were as follows:

[0105]

[0106]

[0107] Compared with the existing method for quickly setting the shrinkage rate of fabrics, the methods for quickly setting the shrinkage rate of fabrics in Embodiments 1, 2, 3, 4 and 5 have significantly reduced shrinkage rates in the warp and weft directions, significantly improved production efficiency, and Embodiment 1 is the best embodiment.

[0108] Test report

[0109] The purpose of the present invention is to solve the problems that the prior art has a long shaping time, which leads to an extension of the production cycle, greatly reduced production efficiency, poor fabric shaping effect, and large consumption of energy and raw materials. A method for rapid shaping of fabric shrinkage is proposed. By adopting the rapid shrinkage shaping method, compared with the traditional shaping method, the shaping time can be significantly shortened, the production efficiency can be improved, and the production cycle can be shortened. The rapid shaping method reduces the consumption of energy and raw materials and greatly reduces the production cost. By optimizing the formula, equipment and process parameters, a stable and consistent fabric shaping effect is achieved, and the quality stability of the product is improved.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments are still modified, or some of the technical features are replaced by equivalents, but these modifications and replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for quickly setting the shrinkage rate of a fabric, characterized in that: The following steps are involved: S1: Take samples from the whole piece of fabric and analyze the corresponding area according to the original area of ​​the fabric; S2: Determine the front and back sides of the fabric according to the front and back characteristics of the fabric; S3: Use direct counting method to measure the warp and weft yarn density of the fabric; S4: mark the warp and weft lengths of the sample, take their average values, and calculate the shrinkage values ​​of the warp and weft yarns; S5: heat setting the fabric, adjusting the heating chamber to the required temperature, and overfeeding in the warp direction; S6: Through indirect heating, the fabric is sent into the heating chamber through a pipe, and the preheating time is shortened or extended according to the characteristics of the fabric.

2. A method for quickly setting the shrinkage rate of fabric according to claim 1, characterized in that: In S1, when sampling from a whole piece of fabric, the distance from the sample to the edge of the fabric is not less than 5 cm, and the distance from the two ends is not less than 1.5-3 m on cotton fabric, not less than 3 m on wool fabric, and about 3.5-5 m on silk fabric. The sample has no obvious defects and is in its original natural state.

3. A method for quickly setting the shrinkage rate of fabric according to claim 1, characterized in that: In S1, the fabric sample of simple structure is 15cm×15cm, the fabric sample of colored fabric with larger structure cycle is 20cm×20cm, and the fabric with large color cycle is the area occupied by one colored yarn cycle; for large jacquard, the analysis part is 20cm×20cm; when the sample size is small, 6cm×5.5cm is taken for analysis.

4. A method for quickly setting the shrinkage rate of fabric according to claim 1, characterized in that: In S2, when analyzing the fabric sample, the front and back sides of the fabric are first determined, wherein the pattern and color of the front side of the fabric are clearer and more beautiful than those of the back side; for convex and concave fabrics, the front side is tight and delicate, with stripes and pattern convex patterns, while the back side is rougher and has longer floating lines; for single-sided raised fabrics, the raised side is the front side of the fabric; for double-sided raised fabrics, the side with clean and neat pile is the front side; the side with clean and neat cloth edges is the front side; for leno fabrics, the side with clear patterns and prominent warps is the front side; for towel fabrics, the side with high terry density is the front side.

5. A method for quickly setting the shrinkage rate of fabric according to claim 1, characterized in that: In S3, the warp and weft yarn density of the fabric is determined by direct counting method with the help of a fabric density analysis mirror. The scale length of the fabric density analysis mirror is 5 cm. Under the analysis lens, a long glass sheet is engraved with a red line. When analyzing the fabric density, the lens is moved to align the red line on the glass sheet and the red line on the scale between two spinning threads. Taking this as the starting point, the number of spinning threads is counted while the lens is moved until the 5 cm scale line is reached. The output number of spinning threads is multiplied by 2, which is the density value of 10 cm fabric.

6. A method for quickly setting the shrinkage rate of fabric according to claim 1, characterized in that: In the above S4, the shrinkage rate is determined by taking a 10 cm length of fabric along the warp and weft vectors at the edge of the sample and marking it. The yarn tassels at the edge are cut short, and then the warp and weft yarns are gently pulled out of the sample. One end of the yarn is pressed with a finger, and the other hand is used to gently straighten the yarn. The length of the warp and weft yarns between the marks is measured with a ruler. After making ten consecutive numbers in this way, the average value is taken to calculate the shrinkage rate of the warp and weft yarns.

7. A method for quickly setting the shrinkage rate of fabric according to claim 1, characterized in that: In S5, the fabric is heat-set. During the setting process, the heating chamber is adjusted to the required temperature. When the fabric enters the heating chamber, it is overfed in the warp direction and gradually stretched in the weft direction by tying the edge of the fabric with two strings of needle clip chains. The high-temperature hot air ejected from the air nozzles of the upper and lower air ducts performs convection heating on the fabric. After the fabric is heated to a specified temperature, it is treated at this temperature for a period of time, guided out of the heating chamber, and dropped after cooling. An automatic edge glue coating device is provided in the fabric inlet area. When the knitted fabric is fed into the fabric, the automatic edge glue coating device coats 3 cm wide quick-drying glue on the edge of the fabric, and the edge of the fabric becomes stiff and smooth. An automatic weft straightening device is provided in the fabric inlet area of ​​the heat setting machine.

8. A method for quickly setting the shrinkage rate of fabric according to claim 7, characterized in that: In the S5, an overfeeding needle device is provided to make the fabric feeding speed greater than the running speed of the needle clip chain. Overfeeding reduces the warp tension of the fabric and expands the fabric in the weft direction. Before the fabric enters the needle clip chain, it first passes through the overfeeding roller, and then passes through a set of three-finger edge strippers on the left and right to remove wrinkles and flatten the fabric. The active brush cloth pressing wheel brushes the two edges of the fabric onto the needle plate between the flexible support belts composed of the active brush cloth pressing wheel and two small guide rollers, and then the passive brush cloth pressing wheel continues to press the fabric deeply onto the fine needles to prevent it from falling off. When used for overfeeding, the linear speed of the active cloth pressing wheel is slightly greater than the linear speed of the overfeeding roller, and the active brush cloth pressing wheel is adjusted to be slightly greater than the linear speed of the overfeeding roller.

9. A method for quickly setting the shrinkage rate of fabric according to claim 1, characterized in that: In S6, 26.5% of biphenyl and 73.5% of diphenyl ether are mixed as a heat carrier through indirect heating to heat the oil to a gaseous state, and then sent to the heating chamber through a pipeline; in the process of being sent to the heating chamber, the gaseous oil is gradually condensed into a liquid for recycling, and the heated air is sent into the room through a fan outside the heating chamber to achieve a heating effect.

10. A method for quickly setting fabric shrinkage according to claim 1, characterized in that: In S6, the fabric needs to go through a certain preheating time before it can reach the heat setting temperature after entering the heating chamber. The distance that the fabric surface temperature goes through to reach the required temperature is the preheating zone, and the corresponding time is the preheating time; the distance from the fabric exiting the preheating zone to the exit of the heating chamber is the setting zone, and the corresponding time is the setting time; Heat setting time = preheating time + setting time; the setting time of fabrics with high elasticity is longer than that of other chemical fiber fabrics, so shorten the preheating time; For fabrics with high requirements on color fastness, the setting time is required to be shortened.

Images