When businesses promote functional T-shirt products, they often use hygroscopic and quick-drying, moisture-wicking, moisture-absorbing, mono-conducting, quick-drying, quick-drying and breathable words to attract consumers' eyeballs. However, sports function T-shirts need to be used. Which indicators are to be assessed, what are the meanings of each indicator, and how are various indicators for outdoor sports chosen? Today Xiao Bian will take you in-depth understanding of the national standards, identify a variety of fresh vocabulary businesses -------
After a lot of exercise, the wearer's real demand for the product is moisture absorption, quick-drying, and perspiration, which allows the sweat to pass through the “hygroscopic-conductive-diffusion and evaporation†process of the fabric, and exports clothing from the body surface to reach the body surface and clothing. Between dry and comfortable state.
At present, the tests and assessments of the performance of moisture absorption, moisture wicking and perspiration are mainly GB/T 21655.1 <Evaluation of the moisture absorption and quick dryness of textiles Part 1: One-way combination test method>, GB/T 21655.2 <Evaluation of moisture absorption and quick-drying of textiles No. 2 Part: Dynamic moisture transfer method.
The GB/T 21655.1 method standard expresses the moisture absorption performance of fabrics based on three factors: water absorption percentage, drip diffusion time, and wicking height. The rate of product evaporation is expressed by the water evaporation rate and moisture permeability of the fabric in a standard atmosphere. Dry performance, specific parameters as shown in Table 1.
Table 1 Evaluation of Moisture Absorption and Quick-dryness of Single Combined Test for Knitted Products
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Assessment requirements
Hygroscopicity
Water absorption/%
≥200
Drip spread time/s
≤3
Wicking height/mm
≥100
Quick-drying
Evaporation rate / (g/h)
≥0.18
Moisture permeability/[g/(m2·d)]
≥10000
In the GB/T 21655.2 method standard, the dynamic moisture transfer method is used to evaluate the moisture absorption, quick drying, and perspiration properties of the fabric. After the sample is soaked in the test solution, the dynamic transfer of liquid water is measured using a sensor that is in close contact with the sample. A series of performance indicators were calculated to evaluate the properties of moisture absorption, quick drying, and perspiration of textiles. The technical requirements for the specific indicators are shown in Table 2 below.
Table 2 Technical Requirements for Moisture Absorption and Drying Properties of Fabrics in GB/T 21655.2
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Performance
Claim
Hygroscopicity
Soaking time
≥3 level
Water absorption rate
≥3 level
Quick-drying b
Maximum wetting radius
≥3 level
Liquid water diffusion rate
≥3 level
Individual transmission index
≥3 level
Perspiration b
Individual transmission index
≥3 level
Comprehensive quick-drying
Individual transmission index
≥3 level
Liquid Water Dynamic Transfer Composite Index
≥2
a Both soaking and penetration surfaces should be reached.
b Performance requirements can be combined, such as moisture absorption and quick-drying, moisture absorption and perspiration.
According to the standard, in the two test methods, the product can meet the technical requirements of each single function index, and each function index can be freely combined. That is, the function tag can be marked with “hygroscopic and quick-dryingâ€, “moisture wickingâ€, and “single guideâ€. Wet (perspiration) and so on. The functional indicators of the product labeling shall meet the technical requirements in the standard document before and after washing, and shall be reflected in the product test report (indicating the number of washing procedures and washing times) before they can be clearly indicated as corresponding performance in the product instructions. The product.
Comparison of the two standardsComparing two different test methods and evaluation indexes GB/T 21655.1 and GB/T 21655.2, dynamic moisture transfer method test method is relatively simple and convenient operation, its evaluation index is also more comprehensive and perfect, and its performance requirements can be combined test, such as moisture absorption and quick drying Sex, moisture, or quick-drying, but it is not intuitive. In the GB/T 21655.1 quick-drying test, the wicking height and the dripping diffusion time can directly express the rapid moisture absorption and diffusion ability of the fabric. In both test methods, hygroscopicity and quick-drying test indicators must meet the standard requirements after washing and washing (the number of washing procedures and washing times are customized by the brand manufacturer and reflected in the product test report). Hygroscopic and quick-drying products.
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