- 15 Dec 2023
The process of application and development of conductive fabric in EMF clothing
With the flood of various electromagnetic
waves, people now live in the encirclement of electromagnetic waves. In order
to reduce the impact of electromagnetic radiation on the human body, people
have developed a variety of textiles, such as electromagnetic shielding
clothing, electromagnetic shielding tents, and so on. In this process, a wide
variety of conductive fabrics are utilized.
Phase I. In
order to shield from the effects of electromagnetic waves in a wide variety of
electronic products, copper-nickel-plated conductive fabric was first
developed. It is plated with a layer of copper and nickel on the polyester
woven fabric, both of which have good conductivity, nickel stability, corrosion
resistance, and the conductive fabric produced by this has excellent
electromagnetic shielding effect, and the SE value can reach about
70-100DB. However, the disadvantage is
that it is not breathable and cannot be washed, so it is mostly used for EMF
products that do not suitable contact with the human body. At the beginning of
the development of electromagnetic shielding clothing, because there is no
other conductive cloth that can be used, so you can only choose
copper-nickel-plated conductive fabric as a clothing interlayer, and the
comfort is naturally worse.
Phase II.
With the microfilament production of stainless steel, people can blend
stainless steel wire with other fibers such as cotton yarn to obtain conductive
yarn, and weave cloth with stainless steel wire conductive yarn, so as to
obtain a variety of conductive cloth, which can be applied to the production of
electromagnetic shielding clothing. However, due to the fact that this
conductive yarn should consider the weaving performance and comfort, it is
blended with stainless steel wire with a content of less than 20% and other
yarns, and the conductivity is relatively poor, and the SE value is generally
20-30DB.
Phase
III. With the development and production of silver
fibers, a conductive fabric that is more suitable for use in electromagnetic
shielding clothing has been discovered. Silver fibers are coated with a layer
of sterling silver on the outer layer of polyamide fibers to obtain conductive
yarn with excellent electrical conductivity. Silver is a precious metal with
excellent electrical conductivity and antimicrobial properties, silver fibers
can be woven into a variety of textiles, breathable, wash-resistant, blended
with other yarns, and can also be woven with 100% silver fibers. The SE VALUE can
reach 40-70DB.
At present, the electromagnetic shielding
textiles in contact with the human body are basically silver fiber conductive
fabric.
