Method for testing comprehensive performance evaluation of ironed textile by adopting rotary ironing instrument

Abstract

The invention relates to a method for testing comprehensive performance evaluation of a textile after ironing by adopting a rotary ironing instrument, which comprises the following steps: 1) after the textile is subjected to humidity adjustment in a temperature and humidity environment to reach humidity adjustment balance, cutting the textile into a specified size, and marking original mark points of the specified size on the textile, measuring and recording the size between the original mark points of the original sample as the original size of the textile; (2) ironing the original sample and the standard polyester single fiber attached lining in a rotary ironing instrument with a set temperature, and regulating the humidity balance under the specified temperature and humidity environment conditions; and (3) finally, comprehensively evaluating the change of the ironed textile and the sticking lining by comparing the original sample of the sample with the original sample of the standard polyester single fiber sticking lining. Compared with the prior art, the method has the advantages that a traditional static single-index test mode is broken through, a dynamic, multi-dimensional and standard comprehensive evaluation system is established, and the accuracy, reproducibility and practicability of detection are improved.

Description

[Technical field]

[0001] The invention relates to the field of textile performance testing after ironing, in particular to a method for evaluating the comprehensive performance of textiles after ironing by using a rotary ironing instrument. [Background Technology]

[0002] At present, the performance test of textiles after ironing mainly adopts manual simulation of ironing with a household iron or the evaluation after ironing by static pressure application of a fixed heating plate using a flat heating device.

[0003] The main issues with using a household iron to simulate manual ironing are poor reproducibility, difficulty standardizing pressure and speed between different operators, and failure to account for potential color contamination. Flat-plate heating devices, due to their size limitations, are difficult to evaluate for dimensional stability. Furthermore, flat-plate heating devices employ a fixed, static pressure mechanism, which doesn't align with the actual ironing process.

[0004] In general, the current post-ironing evaluation testing technology is difficult to meet the needs of modern textile quality control. [Summary of the invention]

[0005] The object of the present invention is to provide a method for evaluating the comprehensive performance of textiles after ironing using a rotary ironing instrument, so as to solve the problems raised in the above background technology.

[0006] To achieve the above purpose, a method for evaluating the comprehensive performance of textiles after ironing using a rotary ironing instrument is designed, comprising the following steps:

[0007] 1) After the textile has been conditioned in a temperature and humidity environment to reach equilibrium, the textile is cut into the specified size and the original marking points of the specified size are marked on the textile. The dimensions between the original marking points of the original sample are measured and recorded as the original dimensions of the textile;

[0008] 2) The sample and the standard polyester single fiber are then ironed in a rotary ironing machine at a set temperature, and the humidity is adjusted to equilibrium again under the specified temperature and humidity conditions;

[0009] 3) Finally, the original sample and the standard polyester monofilament interlining were compared to conduct a comprehensive evaluation of the changes in the textile and interlining after ironing.

[0010] Furthermore, in step 1), the temperature and humidity controlled environment is: temperature 20°C + / - 2°C, relative humidity 65 + / - 4%.

[0011] Furthermore, in step 2), when selecting the temperature of the rotary ironing device, it is determined according to the ironing label in the textile maintenance label, as shown in the following table,

[0012] Iron-on labels Device selection Temperature range Low temperature ironing . 120℃+ / -2℃ Medium-temperature ironing .. 150℃+ / -2℃ High temperature ironing ... 190℃+ / -2℃ No mention of ironing ... 190℃+ / -2℃

[0013] Furthermore, in step 3), the comprehensive evaluation includes: measuring and recording the dimensions between the original marked points of the sample after ironing again in accordance with the regulations as the dimensions of the textile after ironing, and finally calculating the dimensional change rate of the sample before and after ironing according to the prescribed formula; using a color change gray card to evaluate the color change of the textile; and using a staining gray card to evaluate the staining of the polyester single fiber interlining.

[0014] Furthermore, the specific testing steps of the present invention are as follows:

[0015] (1) Preparation of the sample: Spread the sample on a horizontal surface in an environment with a temperature of 20℃+ / -2℃ and a relative humidity of 65+ / -4% for at least 16 hours, then cut it into the specified size according to the sample template. Mark the points according to the sample template with a marker pen. Use a steel ruler to measure the three sets of dimensions of the sample in the longitudinal and latitudinal directions, record them as J1, J2, J3; W1, W2, W3, with an accuracy of 1 mm.

[0016] (2) Start the rotary ironing machine and set the temperature of the ironing machine according to the ironing label or the temperature specified by the customer;

[0017] Set the rotating drum speed to 2 meters per minute, and press the foot pedal to preheat the iron for 1 minute;

[0018] (3) Without releasing the foot pedal, feed the sample to be tested face up along the feed plate into the rotary ironing machine, then take it back from under the ironing cylinder, release the foot pedal, remove the sample and immediately move the test sample and the original sample to the rating box under the D65 light source, use the ISO 105A02 gray scale for color change to evaluate the color change of the original sample, and use the ISO 105A03 gray scale for color transfer to evaluate the color transfer of the backing;

[0019] (4) The sample is then placed in an environment with a temperature of 20°C + / - 2°C and a relative humidity of 65 + / - 4% for at least 4 hours. The test sample and the original sample are moved to a rating box under a D65 light source. The color change of the original sample is evaluated using the ISO 105A02 gray scale for color change, and the color change of the backing is evaluated using the ISO 105A03 gray scale for color transfer.

[0020] (5) Measure the three sets of dimensions in the warp and weft directions of the sample after the test, which correspond to the dimensions before the test, and are recorded as J1', J2', J3'; W1', W2', W3'; calculate the warp and weft dimension change rate according to the formula DC = {(dimensions after the test - dimensions before the test) / dimensions before the test} * 100%, and the dimension change rate is accurate to + / - 0.1%; calculate the average value of the three sets of dimension change rates in the warp and weft directions as the dimension change rate in the warp and weft directions, respectively, and the dimension change rate is accurate to + / - 0.1%.

[0021] Furthermore, the evaluation of the test results of the present invention is:

[0022] ① Dimensional change rate: If the size is woven, it is qualified if the size is within + / -1%, otherwise it is unqualified; if the size is knitted, it is qualified if the size is within + / -3%, otherwise it is unqualified;

[0023] ② The original sample is qualified if the color change reaches ISO 105A02 color change gray card level 4 or above; below level 4 is unqualified;

[0024] ③ If the staining of the lining reaches level 3-4 or above on the ISO 105A03 Grey Scale for Staining, it is considered qualified; if it is below level 3-4, it is considered unqualified;

[0025] ④ If any one of the items ①-③ is unqualified, the test result will be evaluated as unqualified; if the results of items ①-③ are all qualified, the test result will be evaluated as qualified.

[0026] Furthermore, after step (1), the method further includes: sewing a standard polyester single fiber lining with non-fluorescent polyester thread to the center of the front of the sample, and sewing along the two short sides of the standard polyester single fiber lining to keep the lining flat; if multiple colors are involved, multiple pieces of standard cotton single fiber lining are used to ensure contact with all colors.

[0027] Furthermore, the sample template in step (1) is as follows: the outer frame size is 380mm*380mm, the length between the two marking points is 250mm, and the distance from the edge is greater than 50mm.

[0028] Furthermore, the rotary ironing machine includes a sample feeding rack, a feeding plate, a rotating drum, a heating plate, a foot pedal and a sample recovery platform after ironing. The surface of the rotating drum is tightly covered with a wool felt pad, and its speed is set at 2 meters + / - 0.5 meters per minute. The heating plate adopts a heating plate that can optionally control the ironing temperature with an accuracy of + / - 2°C. The foot pedal can control the heating plate to contact and release the rotating drum.

[0029] Furthermore, the single fiber interlining is a standard polyester interlining with a size of (100+ / -2) mm*(40+ / -2) mm.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] (1) The present invention can precisely control the comprehensive contact scenarios of ironing temperature, pressure, and speed during the ironing process, thereby improving the accuracy and reproducibility of the test;

[0032] (2) The evaluation dimensions of the present invention are more comprehensive, and the dimensional change rate, discoloration, and staining are evaluated simultaneously, and the ratings are divided into "immediate" and "secondary humidity adjustment" stages, covering the entire ironing damage;

[0033] (3) The introduction of single-fiber polyester interlining staining of the present invention accurately locates the sublimation of disperse dyes during the ironing process, which is targeted;

[0034] In summary, the present invention breaks through the traditional static single-indicator testing mode and establishes a dynamic, multi-dimensional, standardized comprehensive evaluation system, which improves the accuracy, reproducibility and practicality of the detection, and improves the scientific nature of the evaluation of textile ironing performance, and is worthy of promotion and application. [Brief Description of the Drawings]

[0035] Figure 1 It is a structural schematic diagram of the sample template in the present invention. [Specific implementation method]

[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0037] The present invention provides a method for evaluating the comprehensive performance of a textile after ironing by using a rotary ironing instrument. The principle of the testing method is as follows: after the textile is humidified in a specified temperature and humidity environment to reach humidity equilibrium, the textile is cut into a specified size, and original marking points of the specified size are marked on the textile. The dimensions between the original marking points of the original sample are measured and recorded according to a specified method as the original dimensions of the textile; the sample and a standard polyester single fiber lining are then ironed in a rotary ironing instrument at a set temperature, and humidity equilibrium is again achieved under specified temperature and humidity conditions; and the original sample and the original standard polyester single fiber lining are compared to comprehensively evaluate the changes in the textile and the lining after ironing.

[0038] This comprehensive evaluation includes: 1. Measure and record the dimensions between the original marked points of the ironed sample again according to regulations, which serve as the textile's post-ironing dimensions. Finally, calculate the dimensional change rate of the sample before and after ironing using a prescribed formula; 2. Evaluate the textile's discoloration using the Gray Scale for Color Change; and 3. Evaluate the staining of polyester monofilament interlining using the Gray Scale for Staining. The combined results of these three components serve as the comprehensive performance evaluation of the textile after ironing.

[0039] The scope of application of this invention: all textile fabrics.

[0040] The device of the present invention comprises the following:

[0041] Rotary ironing machine: It consists of a sample feeding rack, a feeding plate, a rotating drum with a surface tightly covered with a wool felt pad, a speed that can be set at (2 meters + / - 0.5 meters) per minute, an optional heating plate that can control the ironing temperature with an accuracy of + / - 2°C, a sample recovery platform after ironing, and a foot pedal that can control the contact and release of the heating plate on the rotating drum.

[0042] Sample template: The outer frame size of the sample template is 380mm*380mm, the length between the two marking points is 250mm, and the distance from the edge is greater than 50mm, as shown in the attached figure.

[0043] Monofiber interlining: Standard polyester interlining, size (100+ / -2)mm*(40+ / -2)mm.

[0044] Indelible marker; scissors; steel ruler with 1mm graduations.

[0045] Rating light box: D65 light source, illumination greater than 600lx.

[0046] Gray Scale for Color Change Rating: Meets ISO 105-A02 requirements.

[0047] Gray Scale for Staining Rating: Meets ISO 105-A03 requirements.

[0048] The humidity control and testing environment of the present invention is:

[0049] Humidity controlled environment: temperature 20℃+ / -2℃; relative humidity 65+ / -4%;

[0050] Rotary ironing machine temperature selection: Determine according to the ironing label in the textile care label.

[0051] Iron-on labels Device selection Temperature range Low temperature ironing · 120℃+ / -2℃ Medium-temperature ironing ·· 150℃+ / -2℃ High temperature ironing ··· 190℃+ / -2℃ No mention of ironing ··· 190℃+ / -2℃

[0052] The specific testing steps of the present invention are as follows:

[0053] 1. Sample preparation: Lay the test sample flat on a horizontal plane in an environment with a temperature of 20℃+ / -2℃ and a relative humidity of 65+ / -4% for at least 16 hours. Then cut it into the specified size according to the sample template. Mark the points according to the sample template with a marker. Use a steel ruler to measure three sets of dimensions in the warp and weft directions of the sample, and record them as J1, J2, J3; W1, W2, W3. The dimensions are accurate to 1mm. Sew the standard polyester monofilament lining to the center of the front of the sample with non-fluorescent polyester thread. Sew along the two short sides of the standard polyester monofilament lining to keep the lining flat. If multiple colors are involved, multiple pieces of standard cotton monofilament lining can be used to ensure contact with all colors.

[0054] 2. Start the rotary ironing machine and set the temperature according to the ironing label or the temperature specified by the customer; set the rotating drum speed to 2 meters per minute; step on the foot pedal to preheat the ironing machine for 1 minute.

[0055] 3. Without releasing the foot pedal, feed the test sample face up along the feed plate into the rotary ironing machine, then retract it from under the ironing cylinder. Release the foot pedal, remove the sample and immediately move the test sample and the original sample to the rating box under the D65 light source. Use the ISO 105A02 Gray Scale for Color Change to evaluate the color change of the original sample; use the ISO 105A03 Gray Scale for Color Staining to evaluate the color staining of the backing.

[0056] 4. The samples are then placed in an environment with a temperature of 20°C + / - 2°C and a relative humidity of 65% + / - 4% for at least 4 hours. The test sample and the original sample are then moved to a rating box under a D65 light source. The color change of the original sample is evaluated using the ISO 105A02 Gray Scale for Color Change; the color change of the backing is evaluated using the ISO 105A03 Gray Scale for Color Staining.

[0057] 5. Measure the three sets of dimensions in the warp and weft directions of the sample after the test, and correspond them to the dimensions before the test, recorded as J1', J2', J3'; W1', W2', W3'; calculate the warp and weft dimensional change rate according to the formula DC = {(post-test dimension - pre-test dimension) / pre-test dimension} * 100%, with an accuracy of + / - 0.1%; calculate the average of the three sets of dimensional change rates in the warp and weft directions as the warp and weft dimensional change rate, with an accuracy of + / - 0.1%.

[0058] Evaluation of test results:

[0059] 1. Dimensional change rate: woven fabrics: qualified within + / -1%, otherwise unqualified; knitted fabrics: qualified within + / -3%, otherwise unqualified;

[0060] 2. The original sample is qualified if the color change reaches ISO 105A02 color change gray card level 4 or above; below level 4 is unqualified;

[0061] 3. If the staining of the lining reaches level 3-4 or above on the ISO 105A03 Grey Scale for Staining, it is considered qualified; if it is below level 3-4, it is considered unqualified.

[0062] 4. If any one of items 1-3 fails, the test result will be evaluated as unqualified; if all items 1-3 pass, the test result will be evaluated as qualified.

[0063] Results report:

[0064] Report the dimensional stability of the sample, the discoloration of the sample, and the staining of the backing separately.

[0065] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field and will not be described in detail here.

[0066] The present invention is not limited to the above-mentioned embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A method for evaluating the comprehensive performance of textiles after ironing using a rotary ironing instrument, characterized in that: The following steps are involved: 1) After the textile has been conditioned in a temperature and humidity environment to reach equilibrium, the textile is cut into the specified size and the original marking points of the specified size are marked on the textile. The dimensions between the original marking points of the original sample are measured and recorded as the original dimensions of the textile; 2) The sample and the standard polyester single fiber are then ironed in a rotary ironing machine at a set temperature, and the humidity is adjusted to equilibrium again under the specified temperature and humidity conditions; 3) Finally, the original sample and the standard polyester monofilament interlining were compared to conduct a comprehensive evaluation of the changes in the textile and interlining after ironing.

2. The method according to claim 1, wherein In step 1), the temperature and humidity control environment is: temperature 20° C.+ / - 2° C., relative humidity 65+ / - 4%.

3. The method according to claim 1, wherein In step 2), when selecting the temperature of the rotary ironing machine, it is determined according to the ironing label in the textile care label, as shown in the following table. 。 4. The method according to claim 1, wherein: In step 3), the comprehensive evaluation includes: measuring and recording the dimensions between the original marked points of the ironed sample again according to the regulations as the ironed dimensions of the textile, and finally calculating the dimensional change rate of the sample before and after ironing according to the specified formula; evaluating the discoloration of the textile using a discoloration gray card; and evaluating the staining of the polyester single fiber interlining using a staining gray card.

5. The method according to claim 1, wherein The specific test steps are as follows: (1) Preparation of the sample: Spread the sample on a horizontal surface in an environment with a temperature of 20°C + / - 2°C and a relative humidity of 65% + / - 4% for at least 16 hours, then cut it into the specified size according to the sample template. Mark the points according to the sample template with a marker pen. Use a steel ruler to measure the three sets of dimensions of the sample in the longitudinal and latitudinal directions, and record them as J1, J2, and J3. W1, W2, W3, accurate to 1mm; (2) Start the rotary ironing machine and set the temperature of the ironing machine according to the ironing label or the temperature specified by the customer; set the speed of the rotating drum to 2 meters per minute, and press the foot pedal to preheat the ironing machine for 1 minute; (3) Without releasing the foot pedal, feed the sample to be tested face up along the feed plate into the rotary ironing machine, then take it back from under the ironing cylinder, release the foot pedal, remove the sample and immediately move the test sample and the original sample to the rating box under the D65 light source, use the ISO 105A02 gray scale for color change to evaluate the color change of the original sample, and use the ISO 105A03 gray scale for color transfer to evaluate the color transfer of the backing; (4) The sample is then placed in an environment with a temperature of 20°C + / - 2°C and a relative humidity of 65 + / - 4% for at least 4 hours. The test sample and the original sample are moved to a rating box under a D65 light source. The color change of the original sample is evaluated using the ISO 105A02 gray scale for color change, and the color change of the backing is evaluated using the ISO 105A03 gray scale for color transfer. (5) Measure the three sets of dimensions in the warp and weft directions of the sample after the test, which correspond to the dimensions before the test, and are recorded as J1', J2', J3'; W1', W2', W3'; calculate the warp and weft dimension change rate according to the formula DC = {(dimensions after the test - dimensions before the test) / dimensions before the test} * 100%, and the dimension change rate is accurate to + / - 0.1%; calculate the average value of the three sets of dimension change rates in the warp and weft directions as the dimension change rate in the warp and weft directions, respectively, and the dimension change rate is accurate to + / - 0.1%.

6. The method according to claim 5, wherein The evaluation of the test results is: ① Dimensional change rate: If the size is woven, it is qualified if the size is within + / -1%, otherwise it is unqualified; if the size is knitted, it is qualified if the size is within + / -3%, otherwise it is unqualified; ② The original sample is qualified if the color change reaches ISO 105A02 color change gray card level 4 or above; below level 4 is unqualified; ③ If the staining of the lining reaches level 3-4 or above on the ISO 105A03 Grey Scale for Staining, it is considered qualified; if it is below level 3-4, it is considered unqualified; ④ If any one of the items ①-③ is unqualified, the test result will be evaluated as unqualified; if the results of items ①-③ are all qualified, the test result will be evaluated as qualified.

7. The method according to claim 5, wherein After step (1), the method further includes: sewing a standard polyester monofilament lining with non-fluorescent polyester thread to the center of the front of the sample, and sewing along the two short sides of the standard polyester monofilament lining to keep the lining flat; if multiple colors are involved, multiple pieces of standard cotton monofilament lining are used to ensure contact with all colors.

8. The method according to claim 5, wherein The sample template in step (1) is as follows: the outer frame size is 380mm*380mm, the length between the two marking points is 250mm, and the distance from the edge is greater than 50mm.

9. The method according to claim 5, wherein: The rotary ironing machine includes a sample feeding rack, a feeding plate, a rotating drum, a heating plate, a foot pedal and a platform for returning the sample to the sample after ironing. The surface of the rotating drum is tightly covered with a wool felt pad, and its speed is set at 2 meters + / - 0.5 meters per minute. The heating plate uses a heating plate with an optional controllable ironing temperature accuracy of + / - 2°C. The foot pedal can control the heating plate to contact and release the rotating drum.

10. The method according to claim 7, wherein: The single fiber interlining is a standard polyester interlining with a size of (100+ / -2) mm*(40+ / -2) mm.

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