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Glossary

Additive:

Substance added to a product to modify it.

Anti-condensation additive:

The addition of this agent to the film fosters the distribution of micro-drops of water into a continuous water layer.

Anti-oxidant Additive:

Additive which prevents black and orange dot-type defects, as well as cross-linking freezing.

Anti-static Additive:

Additive which improves surface slip.

Anti-UV Additive:

Additive that protects polymers, which are very sensitive to deterioration caused by the sun's ultra-violet rays in case of exterior exposure.

Anti-block Additive:

Additive which can solve two major problems commonly occurring in the film industry, which are: easing the winding of the film coil and the "blocking" effect.

Adhesive Additive:

Additive used to manufacture LDPE or LLDPE cling film.

Combined Additives:

Masterbatches with combined properties.

Flame Retardant Additive:

Additive which contributes to flame resistance.

Infra-red Additive:

Allows heat that has been accumulated in the daytime to be maintained throughout the night, through a process of blocking the heat radiation reflected by the ground.

Viscosity-modifying Additive:

Adjusts the polypropylene viscosity (or MFR).

Agent:

Anything that produces an effect in a phenomenon.

Blocking Agent:

Creates nodules at the surface of the film which prevent the film from slipping.

Processing Aid:

The addition of a processing aid that is dispersed microscopically within the polymer creates a constant lubricating layer on the draw plate's surface during extrusion, which fosters the polymer's flow and protects against the undesirable problems such as the "orange peel" and "draw-plate deposit" effects.

Purging Agent:

Accelerates the extruder cleaning process when ranges (colour, polymer type) are changed.

Slip Agent:

The use of slip agents for polyethylene films reduces the Coefficient of Friction (COF) while maintaining optic properties such as brilliance, transparency, and clarity.

Inflating Agent:

Causes the matrix to foam.

Bioplastic:

The term "bioplastic" refers to the various plastic materials derived from renewable resources.

Biopolymer:

Biological macromolecule derived from the polymerization of simple or monomer molecules.

Technical specifications:

The technical specifications are contained in a document that is essential for carrying out a project. It specifically describes the needs that the stakeholders need to meet: objectives, targets, competition, technical specifications, time frames, etc.

Coefficient of Friction (COF):

The coefficient of friction is the ratio between the slip force and the force of attraction between two contacting surfaces. This force is generally gravity. This coefficient is a measure of the difficulty with which the surface of a material slides on another material.

Compacting:

Agglomeration of a homogeneous mix of powders by melting one of the additives. This is carried out by applying pressure to the mix on the draw-plate.

Compound:

Term referring to sets composed of several elements, several materials, or associated devices.

Compounding:

Procedure that consists of mixing a polymer (thermoplastic resin) with one or more additives by melting them together in order to obtain a plastic material.

Extruder:

Machine that carries out extrusions (shaping technique for metals, plastics, etc., through warm threading).

Extrusion:

(Thermo) Mechanical manufacturing process by which a compressed material is forced through a draw-plate with the section of the part to be manufactured.

Granulation:

Operation that consists of transforming powder into an aggregate.

Masterbatches:

Additive concentrates, including pigments and dyes in a thermoplastic resin.

Off-shore :

Term originally referring to activities occurring off-shore. It may apply to several domains. For example, in the petroleum industry, off-shore refers to searching for and harvesting petroleum in the sea, generally on a petroleum platform.

Peroxide:

Oxide with a high proportion of oxygen.

Poly-Iso Butylene (PIB):

Polymer composed of isobutylene monomers.

Polyethylene:

Variety of plastic substrates obtained by polymerization of ethylene.

Polymer:

Molecule with high molecular weight composed of monomers linked to each other through covalent bonds.

Polypropylene:

Transparent, colourless material that turns into plastic when heated and is derived from the polymerization of propylene.

Polytechs :

Polytechs is an independent company whose main activity is the toll compounding of compounds, master-batches and compacted additive blends for producers of polymers and converters. In addition to this specific activity, Polytechs also produces and markets a wide range of additive master-batches.

REACH :

REACH is the regulatory authority that deals with the registration, evaluation, authorisation and restriction of chemical substances.

Toll Compounding:

Work carried out by a service provider on a raw material supplied by the sponsor (dealer).

Polytechs : Zone Industrielle de la Gare, BP 14, 76450 Cany Barville, France - Tél. : +33 (0)2 35 57 81 82. Fax : + 33 (0)2 35 57 81 95