Saturday, May 21

Resin and Fibers

Resin:-
Resin is a clear, yellow, sticky substance produced by plants or similar substance produced chemically for use in industry. Resins are used in polymer, medicine and paint production. Resin can be grouped as natural and synthetic.
Natural resins:
It is produced by plants e.g. pine sap from pine tree is a resin. These are valued for the production of adhesives, varnishes, and food glazing agents. Plant resins are also used as raw materials for the synthesis of different organic compounds and supply constituents of incense and fragrance. The oldest noted use of plant resin comes from the late Middle period of time in Southern continent wherever it had been used as associate adhesive for hafting stone tools.

Synthetic resins:
Many materials are created via the conversion of artificial resins to solids. Synthetic resins are liquid monomer of thermosetting polymers. These are much more stable and uniform than natural resin as well. These are made under controlled conditions without the possibility of the introduction of impurities. Important examples are bisphenol A diglycidyl ether, which is a resin converted to epoxy glue upon the addition of a hardener. Silicones are often prepared from silicone resins via room temperature vulcanization. Alkyd resins are used in paints and varnishes and harden or cure by exposure to chemical element within the air.

Fibers:
The polymers in which the molecular chains are held together through very strong intermolecular forces like strong hydrogen bonding are called as fibers. It is a natural or man-made substance that is significantly longer than its width. Fibers are often used in the manufacture of other materials as they possess very high tensile strength. This property of fibers makes them useful for making fabrics. Nylon-6, 6, terylene, polyesters, orlon etc. are some common fibers. The strongest engineering materials often incorporate fibers, for example carbon fiber and ultra-high-molecular-weight polyethylene. Synthetic fibers can often be produced very cheaply and in large amounts compared to natural fibers, but for clothing natural fibers can give some benefits, such as comfort, over their synthetic counterparts.
Fibers is divided into natural and synthetic substance, their properties will have an effect on their performance in several applications. fiber materials are progressively commutation alternative typical materials like glass and wood during a range of applications. The synthetic fibers can be designed with chemicals, physically, and automatically to suit explicit technical engineering. In selecting a fiber kind, a manufacturer would balance their properties with the technical necessities of the applications. Numerous fibers are accessible to pick out for producing.
Some examples of Natural and man-made ( semi-synthetic and synthetic) fibers are listed below.
Natural fibers:
1. Vegetable fibers
2. Wood fiber
3. Animal fibers
4. Minerals fibers
5. Biological fibers
Semi-Synthetic Fibers:
Cellulose regenerated Fibers
Examples:-
-rayon
-Lyocell
-Modal fiber
-Diacetate fiber
Synthetic Fibers:
1. metallic fibers
2. Carbon fibers
3. Silicon carbide fibers
4. Fiberglass
5. Mineral fibers
6. polymers
7. Microfibers








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