In this website the term ‘us’ , ‘we’ , ‘our’ is refereed to the organization “NAHID” .


Polyethylene is an inexpensive, lightweight, strong, water resistant plastic that can withstand extreme temperatures. Its durability and excellent moisture resistance qualities make polyethylene the ideal material for industrial packaging supplies.

High Density Polyethylene Plastic is non-porous, non-stretching and economic material for plastic bags. It creates a vapor & moisture barrier. In its natural form it has a frosted appearance and makes a crackly/crinkly sound when crushed. It is stronger than LDPE but is not as tear resistant. HDPE is typically used for applications where a very thin cost effective bag is required. The classic high density application is liner bags where tear resistance is not required.

Low density polyethylene (LDPE) is the most widely used material in plastic bags. Porous, strong, stretchable to a degree, has good clarity, has high tear resistance, is clear and is easy to print on. It is used in many packaging applications for products that do not have sharp points. Some familiar applications include heavy duty garbage bags, press seal bags and boutique retail carry bags.


Linear Low Density Polyethylene Plastic is a non-porous, very stretchable, tear and puncture resistant material that is and much less costly than LDPE. It has good clarity and is commonly used for many packaging, liner and trash applications.

The term micron and the symbol μ were officially accepted for use in isolation to denote the micrometer in 1879, but officially revoked by the International System of Units (SI) in 1967.[7]

The micrometer (International spelling as used by the International Bureau of Weights and Measures;[1] SI symbol: μm) or micrometer (American spelling), also commonly known by the previous name micron, is an SI derived unit of length equaling 1×10−6 meter (SI standard prefix “micro-” = 10−6); that is, one millionth of a meter (or one thousandth of a millimeter, 0.001 mm, or about 0.000039 inch).[1]

Plastics engineering encompasses the processing, design, development, and manufacture of plastics products. A plastic is a polymeric material that is in a semi-liquid state, having the property of plasticity and exhibiting flow. Plastics engineering encompasses plastics material and plastic machinery. Plastic Machinery is the general term for all types of machinery and devices used in the plastics processing industry.

Injection molding is a manufacturing process for producing parts by injecting molten material into a mould. Injection molding can be performed with a host of materials mainly including metals (for which the process is called die-casting), glasseselastomers, confections, and most commonly thermoplastic and thermosetting polymers. Material for the part is fed into a heated barrel, mixed (Using a helical shaped screw), and injected (Forced) into a mould cavity, where it cools and hardens to the configuration of the cavity.

Parts to be injection molded must be very carefully designed to facilitate the molding process; the material used for the part, the desired shape and features of the part, the material of the mold, and the properties of the molding machine must all be taken into account. The versatility of injection molding is facilitated by this breadth of design considerations and possibilities.

Blow molding (BrE molding) is a specific manufacturing process by which hollow plastic parts are formed and can be joined together.

In extrusion blow molding (EBM), plastic is melted and extruded into a hollow tube (a parison). This parison is then captured by closing it into a cooled metal mold. Air is then blown into the parison , inflating it into the shape of the hollow bottle, container, or part. After the plastic has cooled sufficiently, the mold is opened and the part is ejected.[2] Continuous and Intermittent are two variations of Extrusion Blow Molding.