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Non-woven fabrics, who said that cloth must be woven?

Date: 2020-04-21
Views: 161

Non-woven fabrics, who said that cloth must be woven?


In the history of the development of human civilization, the birth of a major new material means a change in productivity. Take a look at the huge and far-reaching impact that nonwoven fabrics have had on the daily life of mankind and the application fields related to 'Going to Earth' since the advent of new nonwoven materials in the past 50 to 60 years!


raw material

Non-woven fabric (English name: Non Woven Fabric or Nonwoven cloth), also known as non-woven fabric, is composed of oriented or random fibers to form a web structure, which is then reinforced by mechanical, thermal bonding or chemical methods. The fibers used in the production of non-woven fabrics are mainly polypropylene (PP) and polyester (PET). In addition, there are nylon (PA), viscose fiber, acrylic, ethylene (HDPE), and chloroprene (PVC).


Non-woven fabrics, who said that cloth must be woven?


advantage:

1. Lightweight, with polypropylene resin as the main raw material for production, with a specific gravity of only 0.9, only three-fifths of cotton, with fluffiness and good feel;

2. Soft, composed of fine fibers (2-3D), light-point hot-melt bonding molding. The softness of the finished product is moderate and comfortable;

3. Water repellent, breathable, polypropylene chips are non-absorbent, moisture content is zero, the finished product has good water repellency, is composed of 100% fiber with porosity, good permeability, easy to keep the cloth dry and easy to wash

4. Non-toxic, non-irritating, the product is produced using FDA food-grade raw materials, does not contain other chemical ingredients, stable performance, non-toxic, no odor, does not irritate the skin;

5. Antibacterial, anti-chemical agent, polypropylene is a chemically inactive substance, not moth-eaten, and can isolate the erosion of bacteria and insects in the liquid; antibacterial, alkaline corrosion, finished products do not affect the strength due to erosion;

6. Good physical properties, made of polypropylene spun directly into a mesh and thermally bonded, the product strength is better than that of general short fiber products, the strength is non-directional, and the strength in the vertical and horizontal directions is similar;

7. Environmental protection. In terms of environmental protection, the raw material used for most non-woven fabrics is polypropylene, while the raw material for plastic bags is polyethylene. Although the two substances have similar names, the chemical structures are far from each other. The chemical molecular structure of polyethylene is quite stable and extremely difficult to degrade, so it takes 300 years for the plastic bag to be decomposed;

8. The chemical structure of polypropylene is not strong, the molecular chain can be easily broken, which can be effectively degraded, and enter the next environmental cycle in a non-toxic form, a non-woven shopping bag can be completely in 90 days break down. Moreover, non-woven shopping bags can be reused more than 10 times, and the environmental pollution after disposal is only 10% of the plastic bags.


Disadvantages:

1. Compared with woven cloth, its strength and durability are poor, and it cannot be cleaned like other cloths. The fibers are arranged in a certain direction, so it is easy to split from the right angle and so on. Therefore, the improvement of production methods is mainly focused on the improvement of preventing division.


Weaving process


Non-woven fabrics, who said that cloth must be woven?


1. Spunlace, the spunlace process is to spray high-pressure fine water flow onto one or more layers of fiber mesh to make the fibers entangled with each other, so that the fiber mesh can be strengthened and has a certain strength;

2. Heat-sealed, heat-bonded non-woven fabric refers to adding fibrous or powdery hot-melt adhesive reinforcement material to the fiber web, and then the fiber web is heated, melted and cooled to strengthen the cloth;

3. Pulp air-laid, air-laid non-woven fabric can also be called dust-free paper, dry paper-making non-woven fabric. It uses air-laid technology to open the wood pulp fiber board into a single fiber state, and then uses the air-flow method to condense the fibers on the screen-forming curtain, and then strengthen the fiber into a cloth;

4. 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 make fiber suspension slurry, which is transported to the netting mechanism, the fibers are wet In the state, the net is formed and then reinforced into cloth;

5. Spunbond, spunbond nonwoven fabric is after the polymer has been extruded and stretched to form a continuous filament, the filament is laid into a net, and the fiber web is then self-bonded, thermally bonded, chemically bonded or The mechanical reinforcement method turns the web into a non-woven fabric.


use

Non-woven products are internationally recognized as environmentally friendly products that protect the earth's ecology. It is suitable for agricultural film, shoe making, leather making, mattress, quilt, decoration, chemical industry, printing, automobile, 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 machine under the condition of using water or air as the suspension medium. Although it is a cloth without spinning, it is called non-woven fabric. Non-woven fabrics are a new generation of environmentally friendly materials, which have the advantages of good strength, breathability and waterproof, environmental protection, flexibility, non-toxic and tasteless, and cheap prices. If the material is naturally decomposed outdoors, its maximum life span is only 90 days. It can be decomposed within 8 years when placed indoors. It is non-toxic and harmless when burned, so it does not pollute the environment, so environmental protection comes from it.


Non-woven fabrics, who said that cloth must be woven?


1. Medical and sanitary non-woven fabrics: surgical gowns, protective clothing, sterilization wraps, masks, diapers, civilian wipes, wipes, wet face towels, magic towels, soft towel rolls, beauty supplies, sanitary napkins, sanitary pads , And disposable sanitary cloth, etc .;

2. Non-woven fabrics for home decoration: wall stickers, tablecloths, bed sheets, bed covers, etc .;

3. Non-woven fabrics for clothing: lining, adhesive lining, flakes, shaped cotton, various synthetic leather base fabrics, etc .;

4. Industrial non-woven fabrics: base materials, reinforcing materials, polishing materials, filtering materials, insulating materials, cement packaging bags, geotextiles, covering fabrics for roofing waterproof membranes and asphalt shingles;

5. Agricultural non-woven fabrics: crop protection fabrics, seedling raising fabrics, irrigation fabrics, thermal insulation curtains, etc .;

6. Nonwoven fabrics for clothing and shoes: clothing lining, flakes, hard toe lining, heel lining, underwear, artificial deerskin, synthetic leather, warm shoe lining, cloth sole lining, space cotton;

7. Non-woven fabrics for the automobile industry: waste-spinning insulation felt, shock-proof felt, headliner, cushion lining, carpet, door lining, automobile filter core, molded cushion;

8. Civil engineering, construction: reinforcement, reinforcement, filtration, linoleum base fabric, drainage board, roof waterproofing material, railway, highway, embankment, water slope, port sound insulation, sewer, heat protection, separation, drainage;

9. Other uses: machine heat-resistant tile, map cloth, calendar cloth, artificial cloth, oil painting cloth and so on.


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