Material Description :

Plastics come in a wide range of types and combinations, all with quite useful properties that can be applied to applications to give outstanding performance . Within these types the plastic materials are formulated with additives such as : stabilizers, fillers, modifiers, plasticizers and pigments, all giving or adding specific properties. In industrial applications it is important that the effect of these additives is understood and there is no conflict with contamination or compromise of the performance characteristics in any given application .

UPVC :
( Unplastisized poly vinyl chloride ) This amorphous thermoplastic is the most common. It is low in cost and is easy to fabricate with. PVC is excellent in handling many strong acid and alkali solutions and has a temperature capability of about 60 deg C . The problem with PVC is that it is brittle and can stress crack quite easily and it is commonly made in an extrusion process which on cooling leaves considerable stress within the sheet. Specialty product for the chemical industry can be supplied using a process where it is pressed and this product is virtually stress free.

CPVC :
( Post Chlorinated poly vinyl chloride ) Similar to PVC but higher in temperature capability ( about 88 deg C ). Welding and fabrication are more difficult and care must be taken to use a manufacturer who has known skills using this product . This product can be bonded to fibreglass to make larger strong vessels with these materials as specialty corrosion liners

Low Density Polyethylene :
( LDPE )
High Density Polyethylene :
( HDPE )
Polypropylene Co Polymer :
(CPP) is composed of a mixture of Homopolymer Polypropylene (PP) and Polyethylene (PE). This makes CPP 10 times more impact resistant as compared to PP. CPP Can withstand temperature up to 100 deg C and has the same excellent chemical properties as PP.
Polypropylene Homo Polymer :
( PP )
PVDF :
( Polyvinylidene Fluoride ) The most commonly used Fluoropolymer. It has a high level of purity . Excellent chemical resistance and temperature capability of up to about 138 deg C or 280 deg F. It is frequently used for strong acids, solvents and in the handling of DI water . It not recommended for caustic solutions .

PVDF Copolymer :
( Polyvinylidene Fluoride ) A relatively recent product was developed specifically to adapt the excellent chemical resistant properties of PVDF to metal tank lining applications . The copolymer reduced the modulus and therefore the stiffness to allow for easy application to curved surfaces. It has a temperature performance slightly less at around 121 deg C or 250 deg F .

ECTFE Haylar :
( Ethylene Chlorotrifluoroethylene ) ECTFE is similar to PVDF in its chemical resistance and has a temperature capability to up to about 205 deg C or 400 deg F But this makes it more difficult to weld and thermoform because of its higher melting point .

ETFE :
( Ethylene Tetrafluoroethylene ) Is similar to FEP and PFA in chemical resistance and has a temperature capability up to 205 deg C or 400 deg F . It differs from FEP and PFA in having a higher modulus of elasticity.

PFA :
( perfluoroalkoxy ) These have the most chemical resistance and highest temperature capability at around 260 deg C or 500 deg F . Of the melt processable thermoplastics. They are expensive but effective in selective difficult environments .
FEP :
( Fluorinated ethylene propylene ) These have the most chemical resistance and highest temperature capability at around 205 deg C or 400 deg F . Of the melt processable thermoplastics. They are expensive but effective in selective difficult environments .