Spring is a good time for sports! What are the professional aspects of professional sweatshirts compared with ordinary T-shirts? Let's follow the national standards GB/T 29869-2013 "General Technical Requirements for Knitted Professional Sportswear", GB/T 22853-2019 "Knitted Sportswear" and GB/T 22849-2014 "Knitted T-shirts" to understand:
General physical and chemical properties
Ordinary T-shirts and professional sweatshirts have made requirements for the physical and chemical properties of clothing, including:
Chemical safety of dyes
During the production and processing of clothing, dyes, printing and dyeing auxiliaries are used to give clothes different colors or certain specific functionalities (anti-wrinkle, antibacterial, etc.). Some dyes and auxiliaries can invade the skin, respiratory tract, reproductive system, etc., and use more than a certain dose is harmful to human health.
GB/T 29869-2013 "General Technical Requirements for Knitted Professional Sportswear", GB/T 22853-2019 "Knitted Sportswear" and GB/T 22849-2014 "Knitted T-Shirts" all require the chemical safety of T-shirts or sweatshirts, including formaldehyde content, pH value, decomposable carcinogenic aromatic amine dyes, odor and other items, all of which should meet the requirements of GB 18401-2010 "National Basic Safety Technical Specification for Textile Products.
color fastness
The three standards all stipulate the requirements for color fastness under different use situations such as light, washing, soaping, sweating, rubbing during wearing, etc. The test items include color fastness to light, color fastness to water, color fastness to soaping, color fastness to perspiration, color fastness to rubbing, color fastness to splicing and mutual dyeing, etc.
Appearance quality requirements
The appearance quality requirements of clothing mainly include surface defects, size deviation, size difference of symmetrical parts, sewing regulations, etc. The appearance after washing is also required, including the size change after washing, the distortion after washing, and the appearance quality after washing (including printing parts, embroidery parts, applique parts, accessories, etc.). Among them, the product size change rate of different grades (superior products, first-class products, qualified products) has different requirements.
Particular requirements for water sports products
GB/T 29869-2013 "General Technical Requirements for Knitted Professional Sportswear" has made special requirements for sportswear worn in water sports, including four indexes: color fastness to sea water, color fastness to chlorination (swimming pool water), tensile elastic elongation and tensile elastic recovery rate to chlorinated water (swimming pool water). Among them, the color fastness to sea water only examines professional clothing for sports items in contact with sea water, and the color fastness to chlorinated water (swimming pool water) and the tensile elastic recovery rate of chlorinated water (swimming pool water) only examines swimwear.
Since water sports clothing is clothing used in swimming pools or sea water, it must meet the requirements of color fastness to sea water and color fastness to swimming pool water (chlorinated water). In addition, swimsuits are tight-fitting and conform to the curves of the body. One is to reduce the resistance during swimming, and the other is to prevent light during exercise. In order to withstand stretching for a long time and to meet the requirements of repeated use, it is necessary to meet the requirements of tensile elastic elongation and tensile elastic recovery.
Focus on functional movement
In order to meet the needs of athletes for sports performance and wearing comfort in the process of sports, GB/T T22853-2019 -2013 "General Technical Requirements for Knitted Professional Sportswear" and GB/29869-2013 "Knitted Sportswear" have made requirements for the functionality of knitted sportswear.
It can be seen from the table that GB/T 29869-2013 "General Technical Requirements for Knitted Professional Sportswear" has stricter functional requirements, including moisture absorption and quick drying, windproof and moisture permeability, waterproof and moisture permeability, UV protection, antistatic properties, antibacterial properties, etc. For example, athletes will sweat during running, jumping and other sports. If the sweat cannot be evaporated in time and left on the body, it will affect the wearing comfort of the clothing and the state of the game. Therefore, the moisture absorption and quick drying performance of sportswear have certain requirements. GB/T22853-2019 Knitted Sportswear only requires moisture absorption and quick drying, and is satisfied with daily exercise. However, GB/T 22849-2014 "Knitted T-Shirt" has no functional requirements and is suitable for casual wear. If you want to exercise, especially a lot of or vigorous exercise, it is recommended to wear sportswear. If you want to carry out some special sports or extreme sports, such as mountaineering and skiing, it is recommended to wear professional sportswear such as assault clothes and ski clothes.
At the same time, the standard stipulates that only products with this function are evaluated. For example, for moisture absorption and quick-drying performance, clothing products that meet the requirements of GB/T 21655 "Evaluation of moisture absorption and quick-drying of textiles" series of standards will also be marked with "moisture absorption and quick-drying". For anti-ultraviolet performance, the national standard GB/T 18830-2009 "Evaluation of Anti-ultraviolet Performance of Textiles" stipulates that anti-ultraviolet products shall be clearly marked on the products. When UPF>40 and T(UVA)AV<5%, it can be called "anti-ultraviolet products". Generally, when we buy, we can check whether the tag is marked with the words "UPF 40 +" or "UPF 50 +.