1.cork□Cork is an impermeable buoyant material, the phellem layer of bark tissue that is harvested from commercial use primarily from quercus suber. □Cork is composed of Suberin, a hydrophobic substance. Due to its impermeable, buoyant, elastic and fire retardant properties, it is used in variety of products. □Cork industry is generally regarded as environmentally friendly. Cork production is considered sustainable. It is an excellent gasket material.
2.Wood:-◇Wood is a porous and fibrous structural tissue found in the stems and roots of the trees and other woody plants. It is an organic material, a natural composite of cellulose fibres,that are strong in tension and embedded in matrix of lignin that resists compression. ◇wood has been used for fuel, as a construction material for making tools and weapons, furniture and paper. ◇Hardwood is preferred over softwood because it creates less smoke and burns longer. It is also used as raw material as fiberboard (MDF).
☆Cardboard is a generic term for heavy duty paper based products having greater thickness and superior durability.
☆The construction can range from a thick sheet known as paperboard to corrugated fiberboard which is made of multiple corrugated and flat layers.
■ Paperboard is a paper based material mostly used for playing cards, which require a very rigid single sheet with high surface durability and printability.
5. Different boards.
It is a thin board, coated on one or both sides and is white and smooth.
It is made by pressing a piece of carton board in hot corrugators.
It is a low cost, non archival paper consisting mainly of wood pulp and most commonly used to print newspapers and other publications and advertising material.
●Tissue paper is a light weight paper. It can be made from recycled paper pulp.
●key properties are absorbency, basis weight,thickness,brightness,stretch, appearance and comfort.
7. Synthetic fibre-
♤These are made by humans with chemical synthesis, as composed to natural fibres that humans get from living organisms with little or no chemical changes.
♤synthetic fibres are created by a process known as polymerization which includes combining monomers to make a long chains.
8. Iron filings:
♧Iron filings are small pieces of iron that look like a light powder.They are often used in science demonstrations to show the direction of magnetic field. ♧the south attracts the north pole and repels another south pole.
9.Non crystalline glassy solid.
♡It is a specific subset of non crystalline state and contains no long range order,but it’s short range order is increased by the freezing of gross molecular or segmental motion.
♡It is the vitreous state which encompasses materials that are cooled rapidly.
☆ Fibre is a natural or synthetic substance that is significantly longer than it is wide. Fibres are often used in the manufacture of other materials.
☆Synthetic fibres can often be produced very cheaply and in large amounts compared to natural fibres.
■It is a material consisting of wide range of synthetic or semi synthetic organic compounds that are malleable.
■plasticity is the general property of all those materials which can deform inversibily without breaking but in the class of moldable polymers their actual name drives from this ability.
12.Cotton canvas (cloth material)
◇The cotton canvas cloth is using latest modern technology and machines made out of high quality yarn and supplying to exporters.
◇These fabrics can be painted and can be made fancy enough to carry and are ecofriendly.