What are the common problems with substandard towels?Lanzhou hotel supplies xiaobian tell you.
In all kinds of supervision and random inspection, the unqualified rate of towel products are relatively high, unqualified items mainly involving PH value, color fastness, depilation rate and water absorption rate.
The main reason is that production enterprises use cheap raw materials and dyeing and finishing AIDS in order to reduce the cost. In addition, improper control of production technology affects the quality of finished products.Such as:
1. If poor quality cotton fiber raw materials are used for spinning, the yarn surface hairiness, fiber and other substances are more, which will easily fall off when used for towels, leading to a high depilation rate;
2. In order to pursue the feel of the product, excessive softener is added in the post-finishing, which will lead to poor water absorption and affect the water absorption rate;
3. In the process of dyeing and finishing, dyes, softeners, color fixing agents and other chemical AIDS will be used, but improper treatment will affect the PH value.
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What are the testing standards for towel products?
As household textiles, the quality of towel products should first meet the requirements of national mandatory standard GB 18401-2010 national basic safety technical specifications for textiles, including formaldehyde content, PH value, decomposition and carcinogenic thyme dyes, odor and color fastness.
In addition, towel products are mainly assessed in accordance with the national standard GB/T 22864-2009 towel, which is applicable to all kinds of woven towel products with textile fiber as raw materials. Other towel products can be implemented with reference.Antibacterial towel on the market, zero twist towel, microfiber towels and other products, the industry and introduced the antibacterial towel of FZ/T 62015-2009 and FZ/T62016-2009 zero twist towel, FZ/T62033-2016 microfiber towels and other standards, internal quality assessment of major weight deviation rate, deviation of fiber content, breaking strength, water absorption, hair removal rate and colour fastness.
The international standards related to towels include ASTM d5433-2012 standard performance specifications for towel products in public institutions and household use, BS en14697-2005 textile towels and towel fabrics - specifications and test methods, etc.
In terms of testing, what problems should be paid attention to?Towel testing items are relatively few and basically belong to routine testing items, and the test is also easy to operate, but the following items need attention:
Strength: towel breaking strength test according to GB/T 3923.1-2013 "the textile fabric tensile properties, part 1: determination of the breaking strength and elongation at break) (strip method", according to the standard requirements, sample preparation need to dismantle the edge yarn retains the burrs, the effective width of the sample should be 50 mm, a special structure of the towel, not easy to observe the effective width, pay special attention to when demolition edge yarn.
2. Depilation rate: theoretically speaking, the towel will have hairiness shedding more or less in the test process, the quality after washing should be less than the quality before washing, in extreme cases, the result of not shedding at all should be the quality before washing equal to the quality after washing.However, according to our daily tests, some towel products do show that the quality after washing is greater than the quality before washing, that is to say, the depilation rate is negative, which is because the moisture absorption after washing is better than that before washing, and the towel itself has no or only a small amount of fiber shedding, in this case, the depilation rate is reported by pressing "0".
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