PPE

The whole process of making protective clothing

1n the workplace, people may be exposed to high temperature or flame. 1n this case, they should be given appropriate protective clothing. Therefore, it is necessary to select such protective clothing correctly. Buyers should know the expected effect of such protective clothing. The function of this kind of protective clothing is to act as a fire shield when exposed to fire, that is, a barrier between the wearer and the fire

isolate the heat emitted from the flame and heat source. 1t should also protect the wearer from the heat and fire. The thermal insulation effect provided by such protective clothing for the wearer should be consistent with the requirements of the potential hazards they face when exposed and escaping, and the service life of the protective clothing. 1t should not burn, melt or break when contacting with the flame. 1t should also provide mechanical protection against tearing, abrasion, slitting, and protection against weather changes and chemicals as required for its intended use

once the protection fails, it will bring fatal consequences, so the source of the product is particularly critical. Only after continuous inspection and testing, can the manufacturer, buyer and user be assured that the purchased protective clothing is really “suitable for the purpose”, that is to say, it can receive the expected effect in the expected environment

the final production of protective clothing is a result of crossing the “value chain”; 1t is a series of activities in the production process in which the product goes through each stage of the production process and gradually changes the raw materials into finished products in each stage. Some organizations that produce high-quality products have a good reputation. They strictly implement the performance and quality standards from the beginning to the end of the value chain to deliver finished products to users< (1) fiber making process: as shown in the figure, meta aromatic polyamide fiber is the basic element of fabric and other textile structures. Meta aromatic polyamide, one of the chemical family, is a kind of fiber widely used in high temperature / flame protective clothing, which is characterized by high strength, especially excellent high temperature / flame resistance. The well-known meta aromatic polyamide fibers used in high temperature / flame protective clothing include kermel, conex and Nomex (2) yarn making process: the original form of fiber can not be used in the production of protective clothing. 1n order to do this, they have to turn into yarn, and the process of forming yarn is spinning, that is, winding the fibers together to form yarn. Yarns are used to make fabrics, or to make threads, which sew together to form protective clothing. Meta aromatic polyamide fiber can be spun into meta aromatic polyamide yarn< (3) fabric making process: the fabric as shown in the figure the transition from yarn to fabric is a physical change. Other factors should be considered according to the ultimate use of the protective clothing when using flame retardant fiber to produce high temperature / flame resistant protective clothing fabrics. These factors include structure, weight, comfort, strength, elasticity and color. There are also some factors that need to be considered, such as waterproof / anti chemical, visibility and anti-static. A fabric made from meta aromatic polyamide yarn can be blended with other special high-quality fibers to provide these required functions in the fabric and be used to make protective clothing in the second stage of the value chain< (4) production process of protective clothing: as shown in the figure, the manufacturer of protective clothing designs the characteristics that the buyer may require into the protective clothing, such as the type and position of pocket and placket system. For high temperature / flame protective clothing, the designer must ensure that the design of the clothing can protect the upper and lower torso of the body, including arm to wrist and leg to foot, when the wearer is accidentally surrounded by fire. The thread used to sew the key parts of protective clothing should also be meta aromatic polyamide or other high temperature resistant yarn. 1f the suture used for the main suture of the protective clothing does not have such characteristics, it will melt or burn when it comes into contact with the flame, and the protective clothing will fall apart, which may expose the wearer and make them directly contact with the flame / heat source at all stages of the value chain, manufacturers with good reputation will continuously conduct sampling and testing to test the protection and quality of products. 1n the production process of protective clothing, the protective clothing must be tested and certified by an independent laboratory to meet the standards formulated by Cen, NFPA or 1SO. Such a test is a destructive test on fabrics and / or protective clothing. Therefore, the manufacturer of protective clothing should be able to fully prove that the protective clothing with the same design, composition and quality, which has successfully passed the relevant CEN / NFPA / 1SO test, is produced by the manufacturer in accordance with consistent standards. This is very important copyright notice: This article is reproduced from the network media, only represents the author’s point of view, and has nothing to do with this website. 1f the information column articles and comments violate your legal rights, please call to let us know and we will deal with them in time

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