1. Polypropylene fiber: close to the flame: melting shrinkage; Contact with flame: melting, burning; Leave the flame: continue to burn; Smell: paraffin smell; Residue characteristics: gray white hard transparent bead.
2. Cotton, linen, viscose fiber, copper ammonia fiber: close to the flame: non shrinking and non melting; Contact with flame: rapid combustion; Leave the flame: continue to burn; Smell: smell of burning paper; Residue characteristics: a small amount of gray black or gray white ash.
3. Spandex fiber: close to the flame: melting shrinkage; Contact with flame: melting, burning; Leave the flame: self extinguishing; Smell: special smell; Residue characteristics: white colloidal.
4. Silk and wool fiber: close to the flame: curl and melt; Contact with flame: curl, melt, burn; Leave the flame: slow burning and sometimes self extinguishing; Smell: smell of singeing hair; Residue characteristics: loose and brittle black particles or coke.
5. Polyester fiber: close to flame: melting shrinkage; Contact with flame: melting, smoking, slow burning; Leave the flame: continue to burn, sometimes self extinguish; Smell: special aromatic sweet taste; Residue feature: hard black ball.
6. Vinylon fiber: close to the flame: melting shrinkage; Contact with flame: melting, burning; Leave the flame: continue to burn and emit black smoke; Smell: special fragrance; Residue characteristics: irregular brown hard lump.
7. Nylon fiber: close to the flame: melting shrinkage; Contact with flame: melting and smoking; Leave the flame: self extinguishing; Odor: amino smell; Residue characteristics: hard light brown transparent beads.
8. Acrylic fiber: close to the flame: melting shrinkage; Contact with flame: melting and smoking; Leave the flame: continue to burn and emit black smoke; Smell: spicy; Residue characteristics: black irregular beads, fragile.
9. Chlorine fiber: close to the flame: melting shrinkage; Contact with flame: melting, burning, emitting black smoke; Leave the flame: self extinguish; Smell: pungent smell; Residue characteristics: dark brown hard lump.
The non-woven fabric has no warp and weft threads. It is very convenient to cut and sew, and it is light in weight and easy to shape. It is very popular with handicraft lovers.
Because it is a kind of fabric formed without spinning and weaving, it is simply formed by directional or random arrangement of textile short fibers or filaments to form a fiber mesh structure, and then reinforced by mechanical, thermal adhesive or chemical methods.
It is not interwoven and knotted by yarns, but the fibers are directly bonded together by physical methods. Therefore, when you get the scale in your clothes, you will find that there is no thread end. Nonwovens break through the traditional textile principle, and have the characteristics of short technological process, fast production rate, high output, low cost, wide use, and multiple sources of raw materials.
Relationship between non-woven fabric and spunbonded fabric
Spunbonded fabric and non-woven fabric are subordinate. There are many production processes for the manufacture of non-woven fabrics, of which the spunbonded method is one of them
Spunbonded non-woven fabric
(including spunbonded method, melt blown method, hot rolling method, spunlace method, and most nonwoven fabrics produced by spunbonded method on the market)
According to the composition, non-woven fabrics include polyester, polypropylene, nylon, spandex, acrylic, etc; Different ingredients will have different nonwoven styles. Spunbonded fabric, usually refers to polyester spunbonded, polypropylene spunbonded; The styles of these two kinds of cloth are very similar, which can be identified by high temperature test.
Non woven fabric is a kind of non-woven fabric. It is a non-woven fabric formed by directly using polymer chips, short fibers or filaments to form fibers through air flow or mechanical mesh, then through spunlace, needle punching, or hot rolling reinforcement, and finally after finishing. A new type of fiber product with soft, breathable and flat structure, which has the advantage of not producing fiber chips, being strong, durable and silky soft, is also a kind of reinforcement material, and also has a cotton feel. Compared with cotton fabrics, non-woven bags are easy to form and cheap.
advantage:
1. Light weight: Polypropylene resin is the main raw material for production, with a proportion of only 0.9, which is only three fifths of cotton. It is fluffy and feels good.
2. Soft: It is composed of fine fibers (2-3D) and formed by light spot hot melt bonding. The finished product has moderate softness and comfort.
3. Water pumping and air permeability: Polypropylene chips do not absorb water, with zero moisture content. The finished product has good water pumping performance. It is composed of 100% fibers with good porosity and air permeability, which can easily keep the cloth dry and clean.
Polypropylene Non-woven
4. Non toxic and non irritating: The product is made of FDA food grade raw materials, free of other chemical ingredients, stable in performance, non-toxic, non odor, and non irritating to the skin.
5. Antibacterial and chemical resistant agents: Polypropylene is a chemically passive substance, which is not moth eaten, and can isolate the corrosion of bacteria and insects in the liquid; Antibacterial, alkali corrosion, and finished products will not affect the strength due to corrosion.
6. Antibacterial property. The product has water extraction property, does not mold, and can isolate the corrosion of bacteria and insects in the liquid, and does not mold.
7. Good physical property. It is made of polypropylene spinning directly laid into a mesh and thermally bonded. The strength of the product is better than that of ordinary staple fiber products. The strength has no directivity, and the longitudinal and transverse strengths are similar.
8. In terms of environmental protection, the raw material of most non-woven fabrics is polypropylene, while the raw material of plastic bags is polyethylene. Although the names of the two substances are similar, their chemical structures are quite different. The chemical molecular structure of polyethylene is quite stable, and it is extremely difficult to degrade, so it takes 300 years for the plastic bag to be completely decomposed; The chemical structure of polypropylene is not firm, and the molecular chain can be easily broken, which can be effectively degraded. In addition, polypropylene enters the next environmental cycle in a non-toxic form. A non-woven shopping bag can be completely decomposed within 90 days. Moreover, non-woven shopping bags can be reused for more than 10 times, and the environmental pollution degree after being discarded is only 10% of that of plastic bags.
Disadvantages:
1) It has poor strength and durability compared with textile cloth.
2) It cannot be washed like other fabrics.
3) The fibers are arranged in a certain direction, so they are easy to split from a right angle, etc. Therefore, the improvement of production methods is mainly focused on the improvement of prevention of splitting.