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PET non-woven fabric, also known as polyester non-woven fabric, is a type of fabric made from polyester fibers. It is widely used in various applications such as automotive, filtration, geotextiles, hygiene products, and packaging. The production of PET non-woven fabric involves several steps, including fiber production, web formation, bonding, and finishing. Here is a general overview of the technology and process involved:
Fiber Production:The first step is the production of polyester fibers. Polyethylene terephthalate (PET) chips, which are derived from petroleum, are melted and extruded through spinnerets to form continuous filaments.These filaments are then cooled, solidified, and cut into shorter staple fibers or left as continuous filaments, depending on the desired characteristics of the non-woven fabric.
Web Formation:The staple fibers or continuous filaments are further processed to form a web. This can be done through various methods such as carding, airlaid, or meltblown.Carding: In carding, the fibers are aligned and formed into a thin web by passing them through a series of rollers or cards.
Airlaid: In airlaid, the fibers are dispersed in an air stream and deposited onto a moving belt or screen to form a web.
Meltblown: In meltblown, the continuous filaments are extruded through a die and blown by hot air or other means to form a random web of fine fibers.
Bonding:The web of polyester fibers is bonded together to give it strength and stability. This can be achieved through various bonding methods such as thermal bonding, chemical bonding, or mechanical bonding.
Thermal Bonding: In thermal bonding, the web is passed through heated calender rollers or through an oven where heat is applied to melt the fibers' surface and bond them together.
Chemical Bonding: Chemical bonding involves applying adhesive or binder materials to the web, which are then activated by heat or a chemical reaction to bond the fibers together.
Mechanical Bonding: Mechanical bonding methods include needle punching or hydroentanglement, where barbed needles or high-pressure water jets are used to entangle and interlock the fibers.
Finishing:After bonding, the non-woven fabric may undergo additional finishing processes to enhance its properties or provide specific characteristics. This can include treatments like dyeing, printing, laminating, or coating.
Dyeing and Printing: Dyeing involves coloring the fabric, while printing adds patterns or designs. These processes can be done using various techniques such as immersion, pigment printing, or transfer printing.
Laminating: Lamination involves bonding the non-woven fabric with other materials like films or membranes to enhance its barrier properties or provide additional functionalities.
Coating: Coating can be applied to the fabric's surface to improve its strength, durability, or resistance to water, chemicals, or other specific factors.
It's important to note that the specific technology and process for PET non-woven fabric production can vary depending on the desired characteristics, intended applications, and the machinery used by different Pet Nonwoven Manufacturers.
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