Materials Processed

UPVC (Rigid PVC)

The most widely used rigid material in extrusion for it’s ease of processing and relative cheapness. There are a wide variety of grades available for all types of applications including outdoor, non toxic and clear. We offer a carbon free grade for use on radomes.

Physical Properties
Tensile Strength 2.60 N/mm²
Notched Impact Strength 2.0 - 45 Kj/m²
Thermal Coefficient of expansion 80 x 10 -6
Max Cont Use Temp 60 oC
Density 1.38 - 1.42 g/cm 3

PVC (Flexible PVC)

The cheapest alternative for flexible profiles. Available in a wide variety of grades from soft to semi rigid. Easily coloured to specification but also available in clear or natural. Often used in hoses, tubes, seals, edgings and trims, and can be used in conjunction with rigid PVC to form dual hardness profiles.

Phthalate Free PVC (Flexible PVC)

Phthalates are commonly used as a plasticiser to soften PVC and increase its flexibility. This is why rigid PVC is generally called "UPVC" as the U = Unplasticised.

The most widespread Phthalate, DEHP (also known as DOP) was recently added to the SVHC (Substances of Very High Concern) list under the REACH Regulations. DEHP is already banned from use in manufacture in some countries, and it seems likely that this will also happen within Europe in due course.

The industries most under scrutiny because of Phthalates are Toys and Baby Products (because of the mouthing behavior of children) and Medical products (because of the possibility of Phthalates leaching from PVC into liquids).

TP Extrusions can offer products in Phthalate-free PVC. This material has no mechanical disadvantages over PVC that contains Phthalates, and can be extruded in a full range of colours and Shore Hardnesses, subject to the usual minimum order considerations. Our grades of Phthalate-free PVC are also suitable for medical applications and are Gamma stable (and can therefore be Gamma irradiated).

ABS

Rigid material with good temperature performances (high and low). Has excellent surface finish and colour (mainly indoor use). More expensive than PVC, often used in domestic appliances, housings and tubes for water applications. Fire retardant grades available.

Physical Properties
Tensile Strength 40-50 N/mm²
Notched Impact Strength 10 - 20 Kj/m²
Thermal Coefficient of expansion 70 - 90 x 10 -6
Max Cont Use Temp 80 - 95 oC
Density 1.0 g/cm 3

HIPS and PS

HIPS is mainly used indoors on point of sale with mid range pricing and has good impact strength. For clear applications we can also offer general purpose polystyrene for use on light diffusers for example but it tends to be brittle.

Physical Properties HIPS
Tensile Strength 2.20 - 2.70 N/mm²
Notched Impact Strength 10.0 - 20.0 Kj/m²
Thermal Coefficient of expansion 80 x 10 -6
Max Cont Use Temp 60 - 80 oC
Density 1.0 g/cm 3

PC

Very rigid and strong with good high temperature performance but at relatively high cost. Often used in light diffusers and in vandal proof situations. Clear and colours available.

Physical Properties
Tensile Strength 70 - 80 N/mm²
Notched Impact Strength 60 - 80 Kj/m²
Thermal Coefficient of expansion 65 x 10 -6
Max Cont Use Temp 125 oC
Density 1.20 g/cm 3

HDPE and LDPE

Semi rigid with waxy finish, HDPE is good for outdoor uses and has good low temperature performance and chemical resistance. Often used in tubing and packaging applications. Translucent only.

Physical Properties
Tensile Strength 0.20 - 0.40 N/mm²
Notched Impact Strength no break Kj/m²
Thermal Coefficient of expansion 100 - 220 x 10 -6
Max Cont Use Temp 65 oC
Density 0.95 g/cm 3

PP

Similar in feel to HDPE, this is a very tough material mainly for indoor use. Has a good high temperature performance. Often used in hinges and tubing.

Physical Properties
Tensile Strength 0.95 - 1.30 N/mm²
Notched Impact Strength 3.0 - 30.0 Kj/m²
Thermal Coefficient of expansion 100 - 150 x 10 -6
Max Cont Use Temp 80 oC
Density 0.9 g/cm 3

Others available:

Rigid Materials

1) PETG (Polyethylene Terephthalate) - for high clarity tubing and ticketing applications
2) PPE / PPO (Polyphenylene Ether / Polyphenylene Oxide)
3) Noryl (modified PPO) - for electrical applications
4) Acrylic (Polymethyl Methacrylate PMMA) - for high clarity tubing and ticketing
5) SBC (Styrene Butadiene Copolymer)
6) PC / ABS blends - high cost / high performance materials
7) Nylon 6 / PA6 (Polyamide) - small tubes and rods only
8) CAB (Cellulose Acetate Butyrate) - clear material with encapsulated metallic strip. Cosmetically attractive

Flexible Materials

These materials can typically be extruded and injection moulded, and are rubber-like
9) NBR (Nitrile Based Rubber - a Butadiene / Acrylonitrile Copolymer)
10) SBS (Styrene Butadiene Styrene)
11) SEBS (Styrene Ethylbutadiene Styrene)
12) TEEE (Thermoplastic Elastomer Ether Ester)
13) TPV (Thermoplastic Vulcanisate)
14) TPE (Thermoplastic Elastomers)

Co-extrusion Materials

Successful combinations are dictated by family compatibility
15) UPVC / PVC - rigid profile with flexible attachment(s)
16) PVC / PVC - colour striping or other cosmetic requirements of flexible profiles
17) PP / TPE - rigid and flexible profile, avoiding the risk of PVC shrinkage

Please note that the information given above is for general purposes only and is not a definitive reference guide. Specification sheets for individual grades of material can be submitted on request.

 
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