Ji'Nan Small Workshop Swimsuit Wholesale Wholesale 30, Sell Two Hundred

What is the difference between the swimsuit of twenty or thirty yuan on the stall and the bathing suit of several hundred yuan in the mall? Do you buy swimsuit qualified? Experts say, judging the quality of a swimsuit, besides the safety index (formaldehyde, pH value), color beautification index (color fastness), attention should be paid to the stretching elastic elongation rate and the resilience resilience recovery function of swimming pool water. 21, the reporter bought 6 women's style. Swimsuit 6 men's swimming trunks are numbered in serial numbers and sent to the Shandong provincial Fiber Inspection Bureau for testing to tell you the truth hidden in swimsuits.

Experimental sampling:

No. 1 sample: the department store, an Li Fang, bought a swimsuit of 699 yuan.

No. 2 sample: department store admired the special store and bought a swimsuit of 439 yuan.

Sample No. 3: a swimsuit made of 358 yuan in the department store's competition counters.

No. 4 sample: a set of unlicensed 25 yuan swimsuit bought at a night market stall.

No. 5 sample: 65 yuan of Gnas swimsuit bought at a booth in New World Shopping Mall;

Sample No. 6: 80 yuan odd swimwear purchased from a new stalls in the new world mall.

No. 7 sample: 12 yuan unlicensed swimming trunks bought at night market stalls;

No. 8 sample: 25 yuan swimming trunks bought at a booth in the new world mall.

No. 9 sample: 30 yuan "Shi Meng Da" swimming trunks bought at a booth in the new world mall.

(Note: the single men's swimming trunks are not enough to be sampled, so each sample has bought two pieces. 1 formaldehyde content

During the experiment, the sample was extracted at a temperature of 40 degrees Celsius for a period of time. The extract was coloured with acetylacetone. The absorbance of formaldehyde in the coloring solution was determined by spectrophotometer at the wavelength of 412nm, and the formaldehyde content in the sample was calculated by comparing the working curve of standard formaldehyde. Cut out a piece of checked clothing, about 1g, and cut it up. The extract was extracted by fast solvent extraction apparatus. Formaldehyde was extracted from the sample. Then the extraction solution was derivatized. Finally, the HPLC was used for qualitative and quantitative detection.

The experimental conclusion: the national basic safety technical specification for textile products stipulates that the formaldehyde content of B products (clothing directly to the skin) shall not exceed 75mg, and the formaldehyde content in the 9 samples is less than 75mg, and the formaldehyde content is not exceeding the standard.

　　 Is the pH value exceeding the standard?

Experimental process: at room temperature, the pH value of swimsuit's water extract was measured with a glass electrode pH meter. A sufficient number of samples were extracted from the sample and cut into fragments of about 5cmx5cm to soak them quickly. Weigh three samples of 2G + 0.05g and add them into the triangular flask respectively. Add 100ml distilled water and gently shake the flask to make the sample wet and oscillate for 2 hours on the oscillating machine.

Experimental conclusion: the national standard GB18401-2010 "national textile product basic safety technical specification" stipulates that the pH value of the textile products directly contacting the skin should be controlled between 4 and 8.5. Among the 9 samples sent by the reporters, the pH value of the 7 samples purchased at the stalls is over 8.6. Experts say swimsuits with an excess of pH will cause skin redness or itching.

　 　 Fabric Elastic resilience (%) of resistance to chlorinated water (swimming pool water)

Experimental process: simulated swimsuit soaked in the swimming pool and repeated stretch to test the resilience of textiles. Because men's swimsuit fabrics are not enough to be sampled, this item is only tested in women's bathing suits.

The number of random samples is three blocks straight and transverse, and the effective size of the sample is 10cm * 5cm. The sample was treated with 50mg/L according to the effective chlorine concentration. The sample was first soaked in simulated swimming pool water for 4 hours, and then the textile samples were stretched by professional instruments and equipment. The length of the sample was deformed, and the elastic deformation was calculated according to the deformation size after release.

The experimental conclusion: according to the standard of FZ/T73013-2010 "knitted swimsuit", the tensile elastic recovery rate (%) of the fabric resistant to chlorinated water (swimming pool water) is superior to straight line, transverse or equal to 70, or more than 65, and the qualified product is more than 60. Sample No. 4 is 56.2 straight and 60.5 horizontal. Experts say that if you do not swim in the swimming pool, this bathing suit will be deformed for several times.

　　 Chlorinated water resistant (swimming pool water) Color fastness

Experimental process: simulate the swimming pool in swimming pool water, test the resistance of textile color to various external functions. The samples of the tested textiles were soaked in the dilute solution containing chlorine in the prescribed concentration for 1 hours. After drying, the color of the sample was evaluated by grey card. The 1 grade was the worst and the 5 grade was the best.

　　 Experimental conclusion: all 9 samples are qualified.

Stretch elongation of fabric (%)

The experimental process: the experimental personnel cut the sample from the cloth end 1.5cm above, and cut the sample straight and transverse samples 5 pieces, the size is cut to 10cm * 5cm, the two ends of the length of the sample are tightly clamped in the gripper to carry out the experiment, the test results are represented by the average value of the 5 sample data.

Experimental conclusion: according to the FZ/T73013-2010 "knitted swimsuit" standard: fabric stretch elastic elongation of straight or greater than 120, lateral or equal to 100 as superior products; straight direction is greater than 100, transverse equal to 80 is first class goods; straight direction is more than 80, horizontal or more 70 is qualified products. All 9 samples were qualified. (special statement: this experiment is only for the tested sample itself. The conclusion of the experiment can not be used as advertising propaganda, not as a professional technical index, not as a rigorous scientific data release, for reference only. "Swimsuit is not close to body. It almost goes out." Recently, this newspaper received a lot of public response, saying that it was not easy to buy inferior swimsuit. The swimsuit has become the focus of complaints when it loses color, goes to the water for two times, has no elasticity and breaks the shoulder strap. On the 21 day, reporters visited many stores in the city and some stores selling swimsuits, and found that the quality of swimsuits varied. "Three no" products were rampant and brought safety risks to consumers.