CN112458770A - Processing coping method based on elastic force detection data change before and after dyeing of knitted fabric - Google Patents
Processing coping method based on elastic force detection data change before and after dyeing of knitted fabric Download PDFInfo
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- CN112458770A CN112458770A CN202011368174.5A CN202011368174A CN112458770A CN 112458770 A CN112458770 A CN 112458770A CN 202011368174 A CN202011368174 A CN 202011368174A CN 112458770 A CN112458770 A CN 112458770A
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- dyeing
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
Abstract
The invention discloses a processing coping method based on elastic force detection data change before and after dyeing of knitted fabric, which obtains the stretching coefficients before and after dyeing through testing, compares the stretching coefficients to obtain the stretching coefficient variable quantity, and calculates the stretching force of the grey cloth before dyeing, which needs to be adjusted, by using the variable quantity and the target elastic force value, so as to compensate the change of the stretching coefficients before and after dyeing, which is a reverse thinking that the weaving elastic force value is deduced from the target elastic force value, so that the result meets the requirement, the processing difficulty is reduced, and the production efficiency and the quality are improved.
Description
Technical Field
The invention relates to the technical field of knitted fabric dyeing, in particular to a processing coping method based on elastic force detection data change before and after knitted fabric dyeing.
Background
In the field of knit apparel, there has been a problem that a customer puts down a product that requires a predetermined elastic force (target elastic force) alone, but the actual elastic force of the product processed by a factory has a deviation more or less, and the deviation is still serious, and the result is often unsatisfactory. Especially, when the product with the preset elasticity ordered by the client is used as a uniform code to match with the mass product of a certain group, the preset elasticity is the optimal value obtained through market research, more clients of the group can wear the product with fit and comfort, and the product cannot reach the product with the preset elasticity, so that the product loses the core competitiveness.
The elastic yarn (mainly spandex) selected materials and equipment data set (mainly weft knitting density) during processing in a factory can be used for knitting a blank with very accurate preset elasticity, and the key problem lies in that the elasticity of a dyed finished product is changed after dyeing, and the following two aspects are mainly existed according to the reason: (1) the dye is adsorbed on the surface of the fiber and permeates into the amorphous area filled in the fiber, so that the elastic band of the fiber is changed; (2) the dyeing process requires that the blank is placed in boiling water, and the fabric has the elasticity change after shrinkage. Therefore, the elasticity of the knitted fabric is inevitably changed before and after dyeing due to the reasons.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a processing coping method based on elastic force detection data change before and after dyeing of knitted fabric.
In order to achieve the purpose, the invention is realized by the following technical scheme: a processing corresponding method based on elasticity detection data change before and after dyeing of knitted fabric is characterized by comprising the following steps:
(1) taking a piece of grey cloth before dyeing of the knitted fabric, flattening, measuring the width of the grey cloth in the weft knitting direction in a loose natural state, and recording the numerical value of the width before dyeing, wherein the numerical value is marked as Lq;
(2) placing the gray fabric in a fabric elasticity tester, respectively carrying out multiple tensile tests according to tensile lengths Lq 1-Lqn, and recording numerical values of corresponding elasticity, wherein the numerical values are marked as Nq 1-Nqn;
(3) measuring the stretch coefficient of each stretch length of Lq 1-Lqn in (2) according to the expression N = K X of Hooke's law, wherein X is the stretch length, namely X = Lqn-Lq, and recording the value of the corresponding stretch coefficient, which is marked as Kq 1-Kqn;
(4) calculating the stretch coefficient of the grey cloth by using an average formula K = (Kq1+ … + Kqn)/n, and marking the stretch coefficient as Kq;
(5) spreading and flattening the dyed cloth obtained by dyeing the grey cloth, measuring the width of the dyed cloth in the weft knitting direction in a loose natural state, and recording the numerical value of the width after dyeing, wherein the numerical value is marked as Lh;
(6) placing the dyed cloth in a fabric elasticity tester, respectively carrying out a plurality of times of stretching tests according to stretching lengths Lh 1-Lhn, and recording numerical values of corresponding elasticity, wherein the numerical values are marked as Nh 1-Nhn;
(7) measuring the stretch coefficient of the (6) at each stretch length of Lh 1-Lhn according to the expression of Hooke's law N = K X, wherein X is the stretch length, namely X = Lhn-Lh, and recording the value of the corresponding stretch coefficient, which is marked as Kh 1-Khn;
(8) calculating the stretching coefficient of the dyed cloth by using an average formula K = (Kh1+ … + Khn)/n, and marking the stretching coefficient as Kh;
(9) comparing the stretch coefficients before and after dyeing to obtain the stretch coefficient variation B = Kq/Kh before and after dyeing;
(10) when the fabric is processed, the fabric is expected to be stretched by the same length X before and after dyeing to obtain an expected elasticity value Nh, then Nq/Nh = Kq X/Kh X = B, namely Nq = Nh B, according to the Hooke's law formula, and therefore, the fabric with the elasticity value Nh B before dyeing needs to be selected to compensate for the change of the stretch coefficient before and after dyeing when the expected target elasticity value Nh after dyeing is obtained.
Preferably, in the step (5), after leveling, a standing time of at least thirty minutes and at most one hour is required before measurement. The fabric dyed just out has slow elastic deformation, needs to stand for waiting for a certain time, and then the data tested out are more accurate.
Preferably, in the above steps (2) and (6), the number of times of stretching n is preferably three. The excessive tests are more and less likely to change the results, but the more the tester is concerned, the three-time optimization is preferable.
Preferably, in the steps (2) and (6), the n-times stretch length of the raw fabric and the n-times stretch length of the dyed cloth correspond to each other and are the same. The setting of the length of the front and back stretching is corresponding to the same meaning, which can make the data compared before and after stretching more stable.
Has the advantages that: the invention obtains the stretch coefficients before and after dyeing by testing, compares the stretch coefficients to obtain the variable quantity of the stretch coefficient, and calculates the elastic force of the grey cloth before dyeing, which needs to be adjusted, by using the variable quantity and the target elastic force value, thereby compensating the change of the stretch coefficient before and after dyeing.
Detailed Description
In order to make the technical means, the technical features and the achievement objects of the invention easy to understand, the invention is further described in the following with the specific embodiments.
Example (b): a processing corresponding method based on elasticity detection data change before and after dyeing of knitted fabric is characterized by comprising the following steps:
(1) taking a piece of grey cloth before dyeing of the knitted fabric, flattening, measuring the width of the grey cloth in the weft knitting direction in a loose natural state, and recording the numerical value of the width before dyeing, wherein the numerical value is marked as Lq;
(2) placing the gray fabric into a fabric elasticity tester, respectively carrying out a plurality of times of stretching tests according to stretching lengths Lq 1-Lqn, wherein the number n of stretching times is preferably three, and recording the numerical value of corresponding elasticity, which is marked as Nq 1-Nqn;
(3) measuring the stretch coefficient of each stretch length of Lq 1-Lqn in (2) according to the expression N = K X of Hooke's law, wherein X is the stretch length, namely X = Lqn-Lq, and recording the value of the corresponding stretch coefficient, which is marked as Kq 1-Kqn;
(4) calculating the stretch coefficient of the grey cloth by using an average formula K = (Kq1+ … + Kqn)/n, and marking the stretch coefficient as Kq;
(5) after the dyed cloth obtained by dyeing the grey cloth is flattened, the cloth needs to be stood for at least thirty minutes and at most one hour, then measurement is carried out, the width length of the cloth in the weft knitting direction in a loose natural state is measured, and the numerical value of the width length after dyeing is recorded and marked as Lh;
(6) placing the dyed cloth in a fabric elasticity tester, respectively carrying out a plurality of times of stretching tests according to stretching lengths Lh 1-Lhn, wherein the number n of stretching times is preferably three, and recording the numerical value of corresponding elasticity, and the numerical value is marked as Nh 1-Nhn; it should be noted that the three-time stretching length of the grey cloth and the three-time stretching length of the dyed cloth are in one-to-one correspondence and are the same;
(7) measuring the stretch coefficient of the (6) at each stretch length of Lh 1-Lhn according to the expression of Hooke's law N = K X, wherein X is the stretch length, namely X = Lhn-Lh, and recording the value of the corresponding stretch coefficient, which is marked as Kh 1-Khn;
(8) calculating the stretching coefficient of the dyed cloth by using an average formula K = (Kh1+ … + Khn)/n, and marking the stretching coefficient as Kh;
(9) comparing the stretch coefficients before and after dyeing to obtain the stretch coefficient variation B = Kq/Kh before and after dyeing;
(10) when the fabric is processed, the fabric is expected to be stretched by the same length X before and after dyeing to obtain an expected elasticity value Nh, then Nq/Nh = Kq X/Kh X = B, namely Nq = Nh B, according to the Hooke's law formula, and therefore, the fabric with the elasticity value Nh B before dyeing needs to be selected to compensate for the change of the stretch coefficient before and after dyeing when the expected target elasticity value Nh after dyeing is obtained.
Use of: the invention obtains the stretch coefficients before and after dyeing by testing, compares the stretch coefficients to obtain the variable quantity of the stretch coefficient, and calculates the elastic force of the grey cloth before dyeing, which needs to be adjusted, by using the variable quantity and the target elastic force value, thereby compensating the change of the stretch coefficient before and after dyeing.
Claims (4)
1. A processing corresponding method based on elasticity detection data change before and after dyeing of knitted fabric is characterized by comprising the following steps:
(1) taking a piece of grey cloth before dyeing of the knitted fabric, flattening, measuring the width of the grey cloth in the weft knitting direction in a loose natural state, and recording the numerical value of the width before dyeing, wherein the numerical value is marked as Lq;
(2) placing the gray fabric in a fabric elasticity tester, respectively carrying out multiple tensile tests according to tensile lengths Lq 1-Lqn, and recording numerical values of corresponding elasticity, wherein the numerical values are marked as Nq 1-Nqn;
(3) measuring the stretch coefficient of each stretch length of Lq 1-Lqn in (2) according to the expression N = K X of Hooke's law, wherein X is the stretch length, namely X = Lqn-Lq, and recording the value of the corresponding stretch coefficient, which is marked as Kq 1-Kqn;
(4) calculating the stretch coefficient of the grey cloth by using an average formula K = (Kq1+ … + Kqn)/n, and marking the stretch coefficient as Kq;
(5) spreading and flattening the dyed cloth obtained by dyeing the grey cloth, measuring the width of the dyed cloth in the weft knitting direction in a loose natural state, and recording the numerical value of the width after dyeing, wherein the numerical value is marked as Lh;
(6) placing the dyed cloth in a fabric elasticity tester, respectively carrying out a plurality of times of stretching tests according to stretching lengths Lh 1-Lhn, and recording numerical values of corresponding elasticity, wherein the numerical values are marked as Nh 1-Nhn;
(7) measuring the stretch coefficient of the (6) at each stretch length of Lh 1-Lhn according to the expression of Hooke's law N = K X, wherein X is the stretch length, namely X = Lhn-Lh, and recording the value of the corresponding stretch coefficient, which is marked as Kh 1-Khn;
(8) calculating the stretching coefficient of the dyed cloth by using an average formula K = (Kh1+ … + Khn)/n, and marking the stretching coefficient as Kh;
(9) comparing the stretch coefficients before and after dyeing to obtain the stretch coefficient variation B = Kq/Kh before and after dyeing;
(10) when the fabric is processed, the fabric is expected to be stretched by the same length X before and after dyeing to obtain an expected elasticity value Nh, then Nq/Nh = Kq X/Kh X = B, namely Nq = Nh B, according to the Hooke's law formula, and therefore, the fabric with the elasticity value Nh B before dyeing needs to be selected to compensate for the change of the stretch coefficient before and after dyeing when the expected target elasticity value Nh after dyeing is obtained.
2. The method for processing according to claim 1, wherein the measurement is performed after a standing time of at least thirty minutes and at most one hour is required after the stretch test data is flattened in the step (5).
3. The method for processing according to claim 1, wherein the number of times n of stretching is preferably three in the steps (2) and (6).
4. The process coping method based on elastic force detection data change before and after dyeing of a knitted fabric according to claim 1 or 3, wherein in the above steps (2) and (6), the n-times stretch length of the raw fabric and the n-times stretch length of the dyed cloth are in one-to-one correspondence and the same.
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| CN202011368174.5A CN112458770B (en) | 2020-11-30 | 2020-11-30 | Processing coping method based on elastic force detection data change before and after dyeing of knitted fabric |
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| CN202011368174.5A CN112458770B (en) | 2020-11-30 | 2020-11-30 | Processing coping method based on elastic force detection data change before and after dyeing of knitted fabric |
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| CN112458770B CN112458770B (en) | 2022-08-02 |
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|---|---|---|---|---|
| JP2012144837A (en) * | 2010-12-24 | 2012-08-02 | Toyo Senko Corp | Method for dyeing knitted fabric composed of polyurethane-based elastic fiber, knitted fabric dyed by the method, and stretch cloth and stretch cloth material using the knitted fabric |
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2020
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