GLOSSARY

Antielectrostatic agents
Antielectrostatic agents are the substances which reduce electrification of plastic material surface when added to the polymer.

 


 

Barrier
Barrier film consists of several layers. External layers are made of polypropylene and the middle EVOH layer is the main component of the film.
The characteristic feature of the barrier film packaging is that it considerably limits oxygen penetration and reduces escaping of product aromatic components.

 


 

Dyes
Chemical compounds which strongly absorb electromagnetic radiation energy within a visible range and have the capability to combine permanently with the material dyed. The canal lock used for making plastics of required colours.

 


 

EVOH
Registered trade mark of copolymer resins of ethylene vinyl alcohol which have very good barrier properties.

 


 

 

Homopolymer
Polymer made of one type of monomers.

 


 

 

Calendering
The operation carried out on the calender in order to smooth the products and shape them to a required thickness.

 


 

Copolymer
Polymer made of two or more different monomers.

 


 

Filling materials (fillers)
Auxiliary agents of natural or synthetic origin which most frequently improve use characteristics of a composite.
Price, properties and a form of a filling material are taken into account while choosing a filling material type to be used.

 


 

PP polypropylene
Polymer obtained as a result of propylene polymerisation. Characterized by perfect mechanical and electro-insulating properties. In a room temperature it is resistant to action of numerous chemical agents.

 

PS polystyrene
Polymer obtained as a result styrene polymerisation. Colourless, transparent material which has very good electro-insulating properties; resistant to action of numerous chemical agents.
The following types of polystyrene are distinguished:
low impact polystyrene - brittle, has low resistance to action of an increased temperature (ok. 65°C)
high impact polystyrene - (modified with synthetic rubbers), has higher impact resistance and chemical resistance than low impact polystyrene

 


 

Stabilizers
chemical substances which, when added in small quantities, prevent undesirable transformations which might occur in plastics.

 


 

Styrolux
Registered trade name of BASF Company assigned to the following group of products: block copolymer of styrene and butadiene (SBS). Characteristics: flexible material of high transparency, impact resistant. Application: fruit and vegetable packaging and other food packaging, beverage cups

 


 

Plastics
Materials consisting mainly of natural or synthetic polymers with such additives as dyes, fillers, stabilizers, antielectrostatic agents and flammability reducing agents. The materials are referred to as plastic or plastics.

 


 

Extrusion moulding 
The process of continuous melting of thermoplastic or thermo-elastic materials combined with feeding the material through nozzles which form a required shape out of the material. Plastics are melted mainly by friction in a heated cylinder in which a perpetual screw is rotating. Melted plastic material is fed through the nozzles and cooled down afterwards. Semi-finished products in the form of panels, films, pipes or other profiles are obtained in this way.

 

 

 

 

 
Polifolia
cheap jordan shoescheap jordan shoescheap jordan shoescheap jordan shoescheap jordan shoescheap jordan shoescheap jordan shoescheap jordan shoescheap jordan shoessac longchamp pas chergucci outlet