Detailed explanation of non-woven Production process classification
What is non-woven？
Use fibers or chips
Variety bonding of fibers
Non-woven fabrics are mainly made of polypropylene (PP) and polyester (PET). In addition, there are nylon (PA), viscose fiber, acrylic fiber, polyethylene (HDPE), polyvinyl chloride (PVC). According to the application requirements, non-woven fabrics can be divided into two categories: one-time application type and durable type.
Nonwoven fabric is a kind of nonwoven fabric, which is a non woven fabric formed by directly using high polymer chips, short fibers or filaments to form a net of fibers through air flow or mechanical network, and then through water pricking, acupuncture, or hot rolling reinforcement, and finally finishing.
According to the production process, it can be divided into :
Thermal bonded process is divided into hot rolling and hot air. It refers to adding fibrous or powdery hot-melt bonded reinforcing materials into the web, which is then strengthened by heating, melting and cooling.
Hot air non-woven fabric is one of the hot-air bonded (hot-rolled, hot-air) non-woven fabrics. Hot air non-woven fabric is a kind of non-woven fabric that is formed by carding the fibers and then heating the fibers by using the hot air on the drying equipment to penetrate the fiber web.
Needle-punched technic is a kind of dry nonwovens. it use the puncture function of needles to reinforce the fluffy fibre web into cloth.
Spunlaced non-woven fabrics
Spunlaced non-woven fabrics : Spunlaced process is to spray high-pressure micro-water into one or more layers of fiber mesh, so that the fibers intertwined,
so that the fiber mesh can be strengthened and have a certain strength.
Pulp air-laid non-woven fabrics
Pulp air-laid non-woven fabrics also called dust-free paper,dry paper-making non-woven fabrics. It uses air-flow netting technology to loosen the wood pulp fiberboard into a single fiber state, and then uses air-flow method to agglomerate the fibers on the screen curtain, and then reinforce the fibernet into cloth.
Stitchbond nonwoven fabric
Stitchbond nonwoven fabric is a kind of dry non-woven fabrics. Stitching is to use warp knitting coil structure to reinforce fibre web, yarn layer, non-woven materials (such as plastic sheets, plastic thin metal foil, etc.) or their combination to make non-woven fabrics.
Wet non-woven fabrics
Wet non-woven fabrics it's made by loosening the fibre raw materials placed in water medium into single fibers and mixing different fibre raw materials to make fibre suspension slurry. The suspension slurry is transported to the netting mechanism, and the fibers are netted and consolidated into cloth in the wet state.
Spunbonded nonwovens，It is a kind of spinning and melting process. Spunbonded nonwovens are continuous filaments formed by extrusion and stretching of polymers. The filaments are laid into nets. The nets are then bonded by self-bonding, thermal bonding, chemical bonding or mechanical reinforcement to make the nets non-woven.
Melt blowning are polymer extrusion technic. The principle of the process is to use high-speed hot air to draw the polymer melt which is extruded from the spinneret hole of the die head, so as to form the ultra-fine fiber, which is condensed on the screen curtain or roller, and becomes the nonwovens by self bonding.