In this paper, the identification test of poly (perfluorinated ethylene propylene) fiber was carried out by microscopy, combustion method, chemical dissolution method and infrared spectroscopy. The fiber cross section morphology, combustion property, chemical dissolution property and fiber infrared spectral absorption diagram of poly (perfluorinated ethylene propylene) fiber were summarized. According to the standard and literature, the chemical dissolution test was carried out with the corresponding reagent, and the quality correction coefficient of polyperfluoroethylene propylene fiber in different chemical reagents was obtained and the quantitative analysis scheme was developed. Finally, the validation test of polyperfluorinated ethylene propylene fiber and other fiber mixture was carried out by selecting the corresponding method, which provided the basis for the quantitative analysis of the blended product.

In the inspection and testing work, it was found that the existing fading methods for special animal fibers and wool cannot meet the experimental requirements, and even affect the judgment of the experimental results. Therefore, it is necessary to improve the existing fading methods. This article uses sodium citrate buffer solution to regulate the pH and concentration of the prepared solution, optimize the fading step, and increase the preheating stage of the prepared solution to reduce the damage caused by fading treatment to the sample. It also proposes the suggestion of determining the sampling weight based on the fiber state to make fading sampling more reasonable.

According to the product standards for woven carpets and tufted carpets, structural characteristic indicators and electrostatic performance indicators in the internal quality technical requirements of woven carpets and tufted carpets samples were tested. After sorting, 34 sets of data were obtained. Correlation analysis was conducted on the influence of carpet fiber type and content, unit area pile mass on the carpet base, pile thickness on the carpet base and carpet electrostatic performance. The results showed that nylon content, unit area pile mass, and pile thickness were moderately positively correlated with carpet electrostatic voltage value, while wool content was moderately negatively correlated with carpet electrostatic voltage value. Based on stepwise multiple regressions, a prediction model for carpet electrostatic performance is constructed. The best fit of the model is achieved when the independent variables are wool content and unit area pile mass. Within the range of wool content 78.2%~84.50% and unit area mass 547 g/m2~1078 g/m2, increasing wool content and decreasing unit area mass can improve the anti-static performance of carpets.

Five types of knitted fabrics were used to measure the pilling and pilling performance, and the effects of factors such as the speed of the pilling box, the hardness and friction coefficient of the cork liner, and the hardness of the polyurethane sample tube on the pilling and pilling performance of the pilling box method were studied. The following conclusion can be drawn: factors such as the speed of the pilling box, the hardness and friction coefficient of the cork liner, and the hardness of the polyurethane sample tube have a significant impact on the pilling performance measurement of the pilling box method. The pilling level of the sample tested at a pilling box speed of 30 r/min is lower than that of the sample tested at a speed of 60 r/min. The harder the hardness of the cork cushion, the smaller the friction coefficient, the higher the level of testing fuzzing and pilling data. The greater the hardness of the sample tube, the smaller the deformation of the tube body after being subjected to force, the smaller the contact time and contact area between tubes, the less pilling and pilling of the sample, and the higher the level of testing pilling and pilling data.

Ultraviolet, visible light, and near-infrared radiation can all have a certain impact on human health. Understanding the factors that affect the light barrier properties of textiles is of great significance for improving their light barrier protection perfor- mance. This article introduces the hazards of ultraviolet, visible light, and near-infrared radiation to the human body, analyzes the effects of fiber type, fabric structure, fabric color, chemical additives, and moisture content on the light blocking rate of textiles, compares relevant testing standards at home and abroad, and makes relevant prospects, providing some reference for relevant manu- facturers and consumers.

In this paper, the relevant standards of measuring the combustion performance of chemical fiber by cone calorimeter at home and abroad are studied. Comparative analysis the differences between those standards, provide a reference for the production design and testing of chemical fiber related products in China, and contribute to the compilation and revision of subsequent stan- dards related to the combustion performance of chemical fiber in China.

In order to explore the causes of discoloration at the seasonal crease during the storage and stacking of some textile fab- rics, this paper analyzes from multiple angles that the discoloration may be caused by atmospheric pollutants, and uses a flowing mixed gas corrosion test chamber to test the color fastness of fabrics, and analyzes the influence of temperature and humidity con- ditions on the fabric’s color fastness to nitrogen dioxide and ozone. Through the test, It was found that the discoloration of seasonal creases of textile fabrics came from nitrogen oxide pollutants in the air, and it was particularly significant under high temperature and high humidity conditions.

The traditional qualitative methods for nylon 6 fibers involve the use of acidic reagents and combustion methods, which require the experimenter to inhale a small amount of gas. This method aims to explore an instrumental approach, to reduce the use of reagents and harm to personnel; This method uses differential scanning calorimetry(DSC) to study the thermal properties of nylon 6 fibers. By optimizing the measurement parameters, a heating rate of 30 ℃/min and a sample weight range of 3.5 mg~10.0 mg were determined. In addition, the influence of 12 other common fibers on the thermal effect of nylon 6 fibers was studied. It was found that vinylon has an impact on the qualitative analysis of nylon 6 fibers, while the other 11 fibers: polyester(PET), cotton, ramie, linen, viscose fiber, wool, mulberry silk, acrylic fiber, acetate fiber, spandex, and polylactic acid fiber will not affect the qualitative identification of nylon 6 fibers. Therefore, this method is suitable for the qualitative identification of nylon 6 fibers and the above 11 blended products.

To explore the impact of daily use on the UV protection performance of textiles, comparative tests were conducted on multiple samples under washing, sunlight aging, and tensile treatments. The test results indicate that the anti UV performance of the sample has been improved after washing, and the anti UV performance tends to stabilize after more than 20 times; The anti UV performance of the sample treated with anti UV finishing agent decreases after washing; After 120 hours of sun aging, the UV protection performance of textiles decreased, and some samples had a UPFAV decrease of more than 20%; After tensile deformation, for every 10% increase in sample area, UPFAV decreases by more than 30%.

PET, PBT and PTT fiber are three kinds of polyester fibers, each of the three polyester fibers has advantages and disadvantages, to enhance the advantages and avoid the disadvantages, polyester/polyester bicomponent and elastomultiester were obtained by composite spinning of these three polyester fibers. There is no mature identification method of polyester/polyester bicomponent and elastomultiester so far. the fiber marked is relatively confused, and the reports issued by various testing agencies are not the same, there are some difficulties in the market supervision process. Through the combination of Microscopy, Solubility, Infrared absorption spectrum, Melting point (DSC method), Tensile elastic recovery method test methods, can be used to identify polyester/polyester bicomponent and elastomultiester.

The determination of bis (2-ethylhexyl) tetrabromophthalate in textiles was studied by GC-MS. The extraction solvent, extraction time of ultrasonic pretreatment and GC-MS experimental conditions have great influence on the detection of bis (2-ethyl- hexyl) tetrabromophthalate. The spiking experiment was carried out on cotton, wool and polyester interlining samples that common- ly used in textiles. The recovery of bis (2-ethylhexyl) tetrabromophthalate was in the range of 83.7%~103.3%, the relative standard deviation was in the range of 4.0%~9.4%. In addition, the linear range and the quantitative limit of bis (2-ethylhexyl) tetrabromoph- thalate was 1.0 mg/L ~10.0 mg/L and 20.0 mg/kg, respectively. The method with simple pretreatment process and does not need ro- tating evaporation step; the internal standard method which used here make it accurately and reliably; due to the high recovery and small relative standard deviation, this method is fit for detecting bis (2-ethylhexyl) tetrabromophthalate in textiles.

This article proposes a new method for testing the thermal insulation performance of textiles by simulating sunlight irradiation with halogen spotlights and measuring it with an infrared thermal imager. By comparing the temperature differences of different samples under 15 minutes of irradiation, the insulation value is obtained to evaluate the insulation performance. Research has found that the insulation value tends to stabilize after a testing time of 15 minutes, and the method has high stability and repeatability, which can effectively evaluate the insulation performance of fabrics.

A method was developed for determination of 4 kinds of peppermint antibacterial active compounds in textile fabrics with gas chromatography mass spectrometry(GC-MS). The samples were extracted with methanol under ultrasonic assistance. 4 kinds of peppermint antibacterial active compounds were separated on a DB-WAX column and were detected by GC-MS in selective ion monitoring. The results showed that: the quantification limits were at the range of 1 mg/kg~5 mg/kg, the average recoveries were from 83.1%~106.3%, the relative standard deviations were from 2.4%~6.3%. The method was sensitive and accurate enough to detect the 4 kinds of peppermint antibacterial active compounds in textile fabrics.

By analyzing the differences in filling power test results under different experimental parameters, the influencing factors of filling power test results were explored, and three optimization suggestions for down feather filling power test results were proposed to reduce the differences in laboratory test results and provide accurate and stable filling power test results for down feather enterprises.

In GB/T 4146.1—2020, polyvinyl alcohol fibres are divided into acetalized and unacetalized ones. At present, there are few research on acetalized polyvinyl alcohol fibres. In this paper, the thermal properties and chemical reactions occurring at differ- ent temperatures of acetalised polyvinyl alcohol fibre were studied using thermogravimetric analysis and Fourier transform infrared spectroscopy. The results of the study can be used as a reference for the identification of acetalised polyvinyl alcohol fibre from unacetalised polyvinyl alcohol fibre.

Aiming at the problems of poor objectivity, low efficiency and low accuracy in the identification methods of down feath- er species, an identification method used by near infrared spectroscopy was proposed in this study. The structural composition, chemical and optical properties of goose feather, goose plush, duck feather and duck plush were quantitative evaluated by the near infrared spectrum. Moreover, the feasibility of the method was confirmed by principal component analysis. The results indicated that the comprehensive recognition degree of transmission infrared spectrum is 50%~60%, and the comprehensive recognition degree of diffuse infrared spectrum is 70%~80%. The near infrared spectroscopy method can qualitatively identify the category of down feathers. This identification method is conducive to improve the product quality assurance of plush, safeguard the rights and interests of consumers, promote the standardized development of the market, and provide reference for practitioners and testing per- sonnel in related industries.

Formaldehyde is utilized in the finishing process of textiles; however, excessive formaldehyde content can pose con- siderable health risks to humans. This study validates the key parameters of the automated textile formaldehyde content testing equipment developed. The test results show that the volume of the extraction liquid, sample liquid, and staining liquid all meet the standard requirements. The accuracy and uniformity of the water bath temperature are stable, the residual amount of the automatic cleaning function and formaldehyde recovery rate satisfy the testing requirements. Furthermore, the actual samples have reproduc- ibility in both manual testing and full-automatic testing, indicating that this automated formaldehyde content testing equipment is capable of meeting the relevant requirements of national standards.

Using ultrasonic extraction-HPLC-DAD combined technology to determine the content of isomers of hydroquinone in textile products, optimizing chromatographic parameters and sample pretreatment conditions. The optimized sample pretreatment conditions are: ultrasonic extraction at room temperature, extraction solvent is methanol, and extraction time is 30 minutes. Under optimized conditions, the isomers of hydroquinone have a mass concentration range of 2 mg/L ~30 mg/L, a method limit of quan- tification (LOQ) of 2.0 mg/kg, linear correlation coefficients above 0.99, standard recovery rates of 80.13%~101.63%, and relative standard deviations of 3.15%~9.94% (n=7). This method has simple sample pretreatment, low quantification limit, and accurate measurement results.

To address the challenges of difficult separation in the pre-treatment methods for detecting microplastics in soil, which lead to low extraction efficiency and inaccuracy, a pre-treatment method based on density separation-oxidative digestion has been established and parameters of the steps were compared and tested. Experiments were conducted on various flotation liquids, ultrasonic mixing times, static settling times, and drying temperatures. The results indicate that an ultrasonic elution time of around 30 min ~40 min is optimal. The dual-density flotation method using both NaCl and NaI shows an increased recovery rate for PE, PVC, and PET by 2.43%, 69.10%, and 59.82% respectively, compared to the use of NaCl alone. Furthermore, to avoid thermal damage to microplastics, the drying temperature was determined to be between 50 ℃ ~60 ℃. The use of 30% H2O2 for 24 hours of oxidative digestion was selected to remove organic impurities, and a settling time of at least 24 hours was ensured to ef- fectively separate soil impurities from microplastics. The pre-treatment method based on density separation and oxidative digestion established in this study is simple to operate with high recovery rates, and can provide certain technical support for the study of the decomposition and detection of various microplastics in soil.

For outdoor rainproof clothing that consumers are very concerned about, this article analyzes in detail the factors affect- ing the rainproof performance of clothing from the perspective of fabric and clothing as a whole.And this article summarizes the relevant testing methods for rainproof performance of clothing at home and abroad, analyzes the testing principles, technical param- eter differences, and applicable scope of various methods, in order to help enterprises and consumers better understand the testing methods for rainproof performance of clothing, and provide suggestions.

By performing DSC melting point tests on blends of polyamidoester and polyester fibers at different ratios during first and second heating cycles, and comparing with the melting point method using a microscope, it was demonstrated that in the sec- ond heating cycle test of DSC, the melting point of polyamidoester or polyester fibers cannot be directly obtained when the content is low in the blended sample. There are cases of missed inspections. Additionally, the melting point method using a microscope is more clear and intuitive for distinguishing the melting points of polyamidoester and polyester fibers in blended samples compared to the DSC melting point method, especially for samples with low polyamidoester content. Therefore, the melting point method us- ing a microscope is more suitable for identifying blends of polyamidoester and polyester fibers than the DSC melting point method, providing a practical theoretical basis for the identification of blended products containing polyamidoester and polyester fibers.

4 kinds of hydrostatic pressure methods commonly used of resistance to water penetration testing were compared and analyzed in this paper. Through observation and analysis the test end point phenomenon of common waterproof fabric, test comparison between the method with metal mesh and without metal mesh, and test comparison between the low hydraulic pressure method and the high hydraulic pressure method, to analyze the resistance to water penetration performance of different waterproof fabrics. The results show that, the multi-layer composite fabric and coated fabric often obtain higher hydrostatic pressure value in the test, and the typical third spot of water droplets cannot be observed, which will affect the determination of the end point of the experimenter and lead to the difference of the test results. the metal mesh installed in the test can disperse the force on the fabric surface, which can effectively prevent the sample from excessive deformation during the pressure process, but often obtain a higher hydrostatic pressure value. In the test process of high hydraulic pressure method, the water has not penetrated the fabric surface before reaching the pressure limit of the sample itself, causing the sample to burst and testing termination. This method is more suitable for the sample whose pressure value is much higher than the hydrostatic pressure value.

This study designs a winding device for detecting the breaking strength and elongation at break of raw silk through in- vention, improves the detection method of raw silk breaking strength and elongation at break, enhances work efficiency, reduces the influence of human factors on the detection results, and improves the accuracy of the detection results, obtaining more objective and accurate data.

Based on the national cocoon and silk quality inspection technology comparison in 2024, this article analyzes the causes of errors in each inspection item, and puts forward relevant opinions and suggestions in a targeted manner, providing a scientific and objective reference for accurately grasping the cocoon and silk quality inspection technology level of various professional fiber inspection institutions.

This article reviews the development process of domestic and foreign regulations on the control of perfluorinated and perfluorinated compounds (PFCs), and analyzes and summarizes the extraction technology and detection methods for perfluorinated compounds in clothing products. Hoping to provide more theoretical basis for the detection of perfluorinated compounds in cloth- ing products, and provide direction for future method development. At the same time, I call on the whole society to attach great im- portance to the detection of perfluorinated compounds.

The detection of quantitative analysis of cotton/recycled cellulose fibre blend products is based on GB/T 2910.6—2009 Quantitative Chemical Analysis of Textiles Part 6: Viscose fibres, some copper ammonia fibres, modal fibres or Lyocell fibres and cotton mixture (formic acid zinc chloride method) test, but this standard is not applicable to samples of durable finishing agents or reactive dyes that cannot be completely removed in the fabric. Most cotton/recycled cellulose fibre fabrics are dyed with reactive dyes. The dyed samples often cannot be completely dissolved in quantitative analysis. Dark products are particularly obvious and need to be decolorized. This article conducts experimental research on the conditions of decolorization treatment, and provides ref- erence for the quantitative analysis of this type of textile.

In order to study the difference of the washing size change rate test results of different fabric structures and different materials of bedding products. According to the requirements of product standards, representative bedding samples were selected for testing, and the dimensional stability of different samples after washing size change rate test was compared and analyzed. The results show that the dimensional stability of bedding fabric with larger synthetic fiber content is better than that with higher cotton content for the sample with the same fabric structure. For samples with the same fabric material, the dimensional stability of woven bedding fabric is better than that of knitted fabric, that of plain fabric is better than that of twill fabric, and that of twill fabric is better than that of satin fabric.

A liquid chromatography-tandem mass spectrometry method was established to determine 9 PFAS in textiles. The sample was extracted by methanol ultrasound, filtered, and tested on the machine. Shiseido 150 mm chromatographic column separation, gradient elution with methanol 20 mmol/L ammonium acetate aqueous solution, multi reaction monitoring (MRM) negative ion mode scanning, quantitative analysis using external standard method. This method has good linearity within the linear range of 5.02 ng/mL~834.4 ng/mL, with a correlation coefficient of 0.9937~0.9992 and a detection limit of 3.34 μg/kg~48.98 μg/kg, with a recovery rate of 82.14%~103.43% and a relative standard deviation of 2.05%~7.86%. This method has simple sample pretreatment, fast analysis speed, and high sensitivity, and is suitable for the detection and analysis of 9 PFAS in textiles and textile products. Keywords: HPLC-MS/MS; PFAS; PFHxS

In order to accurately characterize the true value range of the breaking force of the cotton grey yarn, the breaking force was tested according to GB/T 3916—2013 "Textiles-Yarns from packages-Determination of single-end breaking force and elongation at break using constant rate of extension (CRE) tester". The measurement uncertainty of the cotton grey yarn’s breaking force was analyzed and quantified by mathematical statistical methods. The combined uncertainty was quantitatively analyzed , and then the expended uncertainty was calculated. The results indicate that the sources of uncertainty in the breaking force of cotton grey yarn mainly include random effects, the metrological performance of the measuring instrument, pre-tensioning, and the rounding off of numerical values. The expanded uncertainty of the measured results is (2.1×102 ±8) cN, k=2. The uncertainty evaluation in this study can serve as a reference for the uncertainty evaluation of other types of single yarn breaking force measurements.

In order to ensure the accuracy and efficiency of fiber content analysis on silk/wool blended products, com- parative experiments were conducted to analyze the feasibility of using the 56% sulfuric acid method for the quantitative analysis of such blended textiles. The experimental results indicate that the mass correction factor d for wool in a 56% sulfuric acid solution is 1.00. The extreme differences in the content measured by the 56% sulfuric acid method compared to the 75% sulfuric acid method, 35% hydrochloric acid method, and formic acid/zinc chloride method are all less than 3%, which complies with the fiber content tolerance described in GB/T 29862—2013. The experiment demonstrates that the use of the 56% sulfuric acid method for the quantitative analysis of silk/wool blended products is feasible.

This study investigates the effects of different sample width, clamping distance, and testing speed on the results of the tensile strength test for textiles using the grab sampling method. The results show that as the sample width increases, the results of the tensile strength test gradually increase, and when the sample width is increased to 100 mm, the results of the tensile strength test remain basically unchanged as the sample width increases. There is no obvious change in the results of the tensile strength test as the clamping distance increases. As the testing speed increases, the results of the tensile strength test gradually increase. The test results provide data reference for the accuracy of the tensile strength test for textiles using the grab sampling method.

A liquid chromatography-mass spectrometry (LC-MS) method was established for the rapid determination of 2- (4-tert butylbenzyl) acetaldehyde compounds in textiles. After shaking extraction and filtration, the samples were directly tested on the machine. Acetonitrile/water (80/20) was used as the mobile phase and separated using ZORBAX Eclipse Plus C18 chromatography column. The external standard method was used for quantification in MRM mode. Under optimized experimental conditions, the de- tection limit is 1.0 mg/kg, the quantification limit is 2.0 mg/kg, the spiked recovery rate is 80.8%~103.8%, and the relative standard deviation is 1.5%~8.1%. This testing method is simple to operate and has good sensitivity, and can quickly test 2- (4-tert butylben- zyl) propanal in textiles.

This paper briefly introduced the identification methods for fish leather,and took pearl fish leather and eel leather as testing materials,observed their appearance morphology,the grainside and cross -section characteristics of pearl fish leather and eel leather were studied by optical microscope, and then the qualitative differences which can be used to identify the two kinds of leath- er were analyzed and summarized,it can provide reference for the identification of fish leather.

In response to the requirements of high quality development of silk, improve the utilization rate of cocoons and reduce the consumption of raw materials. In this paper, the classifications and grades of yellow spotted light defective silkworm cocoons were studied, and the effects of 4 grades of silkworm cocoons on the reellability and quality were investigated. Some recommenda- tions on the application of light defective silkworm cocoon in producing raw silk were put forward.

This article introduces the detection principle and calculation of goose feather and down content in GB/T 10288-2016 standard, and sorts out and analyzes various influencing factors that may cause differences in results. The purpose is to provide reference for the unification of operation methods and vision identification among testing institutions, and provide scientific guidance for the production of enterprises, so as to reduce the risk in production and trade.

Impurity rate test is one of the important indicators of cotton notarization test, which provides a basis for cotton transaction price and fairness. CGT-1 intelligent tester of raw cotton impurity realizes the full automation of raw cotton impurity rate test, which plays an important role in the inspection of Xinjiang regulatory cotton. Due to the particularity of Xinjiang regulatory cotton inspection, it takes a long time, high strength, overload and uninterrupted operation during the peak period of cotton inspection, which is easy to increase the frequency of failure. Once the equipment fails, it will inevitably affect the normal inspection work. This paper summarizes the common faults in the operation of CGT-1 tester, and puts forward the corresponding solutions, which ensures the accuracy and stability of the test data and improves the test efficiency.

In order to determine the effect difference, advantages and disadvantages of different moisture regain testing methods, MBS-2 moisture tester and AT-MBC-212D1 moisture regain tester were used to test low, medium and high moisture regain of 558 baled cotton purchased from national cotton market, the results of moisture regain were compared and analyzed. The results showed that there was no significant difference between the two methods for the test data of cotton bales with low and high moisture regain, and the test data of MBS-2 cotton bales moisture tester was more stable, especially for the test of cotton bales with high moisture regain, the stability of MBS -2 cotton bag moisture meter is more outstanding, and the data measured by microwave method fluctuates more greatly. According to this, the cotton notary inspection institution can choose the suitable moisture regain testing device, and provide reference for the development and improvement of the moisture regain instrument of cotton bag.

In order to investigate the performance of corduroy cotton fabric flanging, the influence factors of corduroy fabric flanging test were analyzed, and the influence of 5 test parameters such as folding direction, applied load, friction rate, friction medium and fabric friction surface on the flanging of corduroy cotton fabric was studied by orthogonal test method. The wear condition of cloth surface is tested and analyzed by means of micro image processing and mass loss ratio calculation. The results show that the influence of 5 test parameters on fabric hem wear is statistically significant, and when the folding direction is inclined to 45°, the load is 500 cN, the rotation rate is 60 r/min, and the friction medium is grinding wheel, the mass loss of corduroy cotton fabric hem grinding is the largest.

This article delves into the detection and control techniques of pesticide residues in cotton production. In terms of detection, the article provides a detailed analysis of various technical methods such as gas chromatography, high-performance liquid chromatography, chromatography-mass spectrometry, capillary electrophoresis, and tandem mass spectrometry, and evaluates their accuracy and efficiency in detecting pesticide residues. In terms of control technology, the article explores strategies for the rational use of pesticides, analyzes the advantages of biological control technology, and proposes suggestions for optimizing agricultural production management measures, including crop rotation, increasing organic fertilizer application, and improving soil structure.

A comparison and analysis were made on the test conditions and steps of the standard GB/T 12704.1—2009 hygroscopic method and the evaporation method (positive cup method) and the evaporation method (inverted cup method) in GB/T 12704.2—2009. Combined with the problems encountered in daily testing, precautions were proposed during the testing process.