In the history of the development of human civilization, the birth of a major new material means a revolution in productivity change. Take a look at the huge and far-reaching impact it has had on human daily life and application fields related to “heaven and earth” in the past fifty or sixty years since the advent of new non-woven materials!
Raw materials
Non-woven fabric (English name: Non Woven Fabric or Nonwoven Cloth), also known as non-woven fabric, is composed of directional or random fibers to form a fiber mesh structure, which is then reinforced by mechanical, thermal bonding or chemical methods. The fibers used in non-woven fabric production are mainly polypropylene (PP) and polyester (PET). In addition, there are nylon (PA), viscose fiber, acrylic fiber, ethylene fiber (HDPE), and polyvinyl chloride (PVC).
Advantages
It is light in weight and uses polypropylene resin as the main raw material. The specific gravity is only 0.9, only three-fifths of cotton. It is fluffy and feels good.
Soft, composed of fine fibers (2-3D) and lightly dot-shaped hot-melt bonding. The finished product is moderately soft and comfortable
Water-repellent and breathable. Polypropylene slices do not absorb water and have zero moisture content. The finished product has good water-repellency and is composed of 100% fiber. It is porous and has good breathability, making it easy to keep the cloth surface dry and easy to wash.
Non-toxic, non-irritating, the product is produced with FDA food-grade raw materials, does not contain other chemical ingredients, has stable performance, non-toxic, no odor, and does not irritate the skin .
Antibacterial and chemical resistant. Polypropylene is a chemically inert material that is not moth-eaten and can isolate bacteria and insects in liquids; antibacterial, Alkali corrosion, the strength of the finished product will not be affected by corrosion.
It has good physical properties. It is made of polypropylene spun and directly laid into a mesh and thermally bonded. The strength of the product is better than that of ordinary short fiber products, and the strength has no directionality. The vertical and horizontal strengths are similar.
Environmental protection. In terms of environmental protection, the raw material of most non-woven fabrics used is polypropylene, while the raw material of plastic bags is polyethylene. Although the two substances have similar names, they are different in chemical structure. Very far. The chemical molecular structure of polyethylene is very stable and extremely difficult to degrade, so it takes 300 years for plastic bags to decompose;
The chemical structure of polypropylene is not strong, and the molecular chain can be broken easily, so that it can be effectively degraded and enter the next step of environmental cycle in a non-toxic form. A non-woven shopping bag can be recycled within 90 days. It can be completely decomposed. Moreover, non-woven shopping bags can be reused more than 10 times, and the environmental pollution after disposal is only 10% of plastic bags.
Disadvantages.
Compared with textile fabrics, it has poorer strength and durability and cannot be washed like other fabrics. The fibers are arranged in a certain direction, so it is easy to split at right angles, etc. Therefore, the production method is different. The improvements are mainly focused on preventing splitting.
Weaving process
Spunlace, the spunlace process is to spray high-pressure fine water onto one or more layers of fiber webs to entangle the fibers with each other, so that the fiber webs can be reinforced and have a certain strength.
Heat-sealing and heat-bonding non-woven fabrics refer to adding fibrous or powdery hot-melt adhesive reinforcement materials to the fiber web, and then the fiber web is heated, melted and cooled to form a cloth.
Pulp air-laid, air-laid non-woven fabrics can also be called dust-free paper and dry paper-making non-woven fabrics. It uses air-laid technology to open wood pulp fiberboard. It is loosened into a single fiber state, and then the fibers are agglomerated on the mesh curtain using air flow, and the fiber mesh is then reinforced into cloth.
Wet method, wet non-woven fabric is to open the fiber raw materials placed in the water medium into single fibers, and at the same time mix different fiber raw materials to form a fiber suspension slurry, and the suspension slurry is transported to the web forming mechanism, and the fiber In a wet state, it is formed into a web and then reinforced into a cloth.
Spunbond, spunbond non-woven fabric is formed after the polymer has been extruded and stretched to form continuous filaments. The filaments are laid into a web, and the web is then bonded by itself, thermally bonded, and chemically bonded. combination or machineMechanical reinforcement method to turn the fiber web into non-woven fabric.
Usage
Non-woven products are internationally recognized as environmentally friendly products that protect the earth’s ecology. It is suitable for agricultural film, shoemaking, leathermaking, mattresses, quilts, decoration, chemicals, printing, automobiles, building materials, furniture and other industries. It is widely used and economical.
Non-woven fabrics are made of chemical fibers and plant fibers on wet or dry paper machines using water or air as the suspension medium. , although it is cloth but not woven, it is called non-woven fabric. Non-woven fabrics are a new generation of environmentally friendly materials that have the advantages of strong strength, breathability and waterproofing, environmental protection, flexibility, non-toxic and odorless, and low price. If the material is left outdoors and decomposes naturally, its long life is only 90 days. When left indoors, it decomposes within 8 years. It is non-toxic and harmless when burned, and does not pollute the environment, so it is environmentally friendly.
Non-woven fabrics for medical and sanitary use: surgical gowns , protective clothing, disinfection wraps, masks, diapers, civilian rags, wipes, wet wipes, magic towels, soft towel rolls, beauty products, sanitary napkins, sanitary pads, and disposable sanitary cloths, etc.
Non-woven fabrics for home decoration: wall coverings, tablecloths, sheets, bedspreads, etc.
Non-woven fabrics for clothing: linings, adhesive linings, wadding, styling cotton, various synthetic leather base fabrics, etc.
Industrial non-woven fabrics: base materials for roof waterproofing membranes and asphalt tiles, reinforcement materials, polishing materials, filter materials, insulation materials, cement packaging bags, Geotextile, covering cloth, etc.
Non-woven fabrics for agriculture: crop protection fabrics, seedling raising fabrics, irrigation fabrics, thermal insulation curtains, etc.
Non-woven fabrics for clothing and shoemaking: clothing linings, wadding, hard toe linings, heel linings, underwear, artificial deerskin, synthetic leather, warmth Shoe lining, cloth sole lining, space cotton.
Non-woven fabrics for the automotive industry: waste textile insulation thermal felt, anti-shock felt, headliner, seat cushion lining, carpet, door lining, car filter element, molding cushion.
Civil engineering, construction: reinforcement, reinforcement, filtration, linoleum felt base fabric, drainage board, roof waterproofing materials, railways, highways, berms, water slopes, port sound insulation, sewers, heat protection, separation, drainage.
Other uses: machine-resistant heat tiles, map cloth, calendar cloth, artificial cloth, canvas, etc.
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