Plastics are inherently resistant to corrosive media and degradation will outlast traditional metal alternatives. From standard grade materials to custom filled composite grades that are tailor made to overcome engineering challenges.
PTFE
PTFE Virgin Skived
- Excellent chemical resistance
- Very low friction coefficient
- Physiologically safe (Food Safe)
- Low flammability
- Operating temperature: -200°C to +260°C
- Very good UV resistance
- Colour: Natural (White)
- Sheet size 1200 x 1000 (comes in 30m rolls) from 0.25 – 6mm thick
Applications: Seals, valve seats, bearing pads, high temperature components in food processing and nonstick applications.
PTFE Filled
PTFE fillers are additives used to modify the properties of PTFE-based materials. These fillers can improve mechanical strength, electrical conductivity, wear resistance, and enhance its performance in specific applications. Most common fillers are Carbon, Bronze, and Glass in various percentages to suit the application.
PTFE Moulded
- Excellent chemical resistance
- Very low friction coefficient
- Physiologically safe (Food Safe)
- Low flammability
- Operating temperature: -200°C to +260°C
- Very good UV resistance
- Colour: Natural (White)
- Sheet size 1200×1200 from 8 – 50mm thick
Applications: Seals, valve seats, bearing pads, high temperature components in food processing and none stick applications.
PTFE Etched
Virgin PTFE grade for ram extrusion, compression and Isostatic moulding. Etched meaning the processed obtained by sodium naphthalene or sodium ammonium.
- Good mechanical properties
- Great chemical resistance
- Great electrical insulation properties
- Excellent temperature resistance
- High limiting oxygen index
- Provides a keyed surface suitable for bonding
- UV resistance
- Etched on one side allowing for bonding onto substrate
- Low friction
- FDA approved
- Colour: White
PEEK
PEEK Natural (Unfilled)
Polyetheretherketone (PEEK) is a high-performance, high-temperature, semi-crystalline thermoplastic. This advanced material combines excellent wear resistance and very good mechanical properties, even under thermal load. It also boasts outstanding chemical resistance and a high operating temperature of 260°C.
- Good heat deflection temperature
- Good machinability
- Inherent flame retardant
- Resistance against high energy radiation
- Good slide and wear properties
- Very good chemical resistance
- High creep resistance
- Hydrolysis and superheated steam
- Resistant
- Medical grades available on request
PEEK Black
This black pigmented version of PEEK plastic demonstrates improved UV resistance in addition to the other typical PEEK properties which make this product an ideal material of choice for outdoor use. This is available in rod, plate, and tube in a variety of dimensions as well as available in a host of modified grades with various fillers to enhance its performance to suit your application. A few examples such as Carbon, Glass, Ceramic are available.
- Good heat deflection temperature
- Inherent flame retardant
- Resistance against high energy radiation
- High strength
- Good chemical resistance
- High creep resistance
- Hydrolysis and superheated steam resistant
Mica
Mica consists of multiple layers of Muscovite or Phlogopite Mica paper impregnated with a Silicon binder.
- Mica has excellent mechanical, thermal & electrical properties
- Colour: Silver
- Dielectric strength: >20 kV/mm
- Temperature:
- Muscovite: >500°C
- Phlogopite: >700°C
Applications: Insulation between high temperature heat platens and moulds. Insulation in induction arc furnaces.
NAD500
NAD-500 is an asbestos-free cement board with excellent electrical properties. A high density cement board reinforced with inorganic fibres.
- Good mechanical strength at operating temperatures
- Colour: Grey
- Dielectric strength – kV/mm(V/mil): 2.90(73.70)
- Temperature: 500°C
Applications: Cathode support pad, platen insulation, element support, oven cladding, furnace plate, induction furnaces.
PA - Nylon
Nylon 6 Extruded
- Good mechanical stability
- High impact strength & shock resistance
- Very good abrasion resistance
- High tensile stress & compressive strength
- Good damping properties
- Self lubricating
- Colours: Natural or Black
- Sizes: (rods 6 Ø – 45 Ø), (sheets 1mm – 8mm thick)
- Weakness: Material is hydroscopic
Applications: General purpose material, washers, brushes, spacers, guides, and wheels.
Cast Nylon 6
- Superior properties to Extruded Nylon 6
- Better mechanical stability
- Lower water absorption
- Higher wear resistance
- Better dimensional stability
- Good creep resistance
- Colours: Natural or Black
- Sizes: (rods 50 Ø – 250 Ø), (sheets 10mm – 100m thick)
- Filled grades available: DEMEX is a premium oil filled cast nylon having higher pressure/velocity capability (PV) than standard unfilled nylon. Molybdenum disulphide(MoS2) filled black and premium wax filled cast nylon
- Weakness: Material is hydroscopic
Applications: Large diameter components, gear wheels, pulleys, guide bearings, slide bearings.
POM - Acetal
- Very good dimensional stability & sliding properties
- High rigidity & hardness
- Very easy to machine
- Good impact resistance at low temperatures
- Very low moisture absorption (0.8% at saturation)
- Good creep resistance
- Food safe
- Colours: Natural or Black
Applications: Bearings, cams, gears, conveyor rollers, gear wheels, precision machined components.
PE - Polyethylene
DEMPRO PE 300 (Extruded)
- Very good chemical resistance
- Very good strength & wear resistance
- Low friction coefficient
- Low specific gravity
- Suitable for welding
- Food safe
- Continues operating temperature 80°C
- Easy to machine
- Colours: White or Black
- Available in rods and sheets up to 8mm thick
- Very low moisture absorption (0.8% at saturation)
DEMPRO 500 (Pressed)
- Very good chemical resistance and better impact strength than PE300
- High shock resistance
- Good abrasion resistance
- Good electrical insulating properties
- Low specific gravity
- Low coefficient of friction
- Continues operating temperature 80°C
- Food safe
- Colours: White or Black
- Very low moisture absorption (0.8% at saturation)
DEMPRO UHMWPE/PE1000
- Very good chemical resistance
- Excellent abrasion resistance
- Superior impact strength and shock resistance
- Operates at temperatures as low as -200°C.
- Very low friction coefficient
- Low specific gravity
- Continues operating temperature 80°C
- Easy to machine
- Widely used in conveyors, bottling and packaging machines
- Virgin material is food safe
- Very low moisture absorption (0.8% at saturation)
DEMPRO UHMWPE Regen
- Good wear resistance
- Good sliding properties
- UV resistant in black
- Antistatic in black
- Colour: Green or Black
- Low cost alternative to Virgin UHMWPE with similar benefits
- Continues operating temperature 80°C
- Suitable for machined chain guides and wear strips
UHMWPE profiles
DEMS Gartech is a specialist manufacturer of Ultra High Molecular Weight Polyethylene (UHWMPE) roller chain guides, profiles and wear strips. UHWMPE chain guides extend chain life, reduces noise, friction and ultimately reduces power consumption.
Available in all standard profiles or custom make to your specifications with distribution facilities in Durban, Cape Town and Johannesburg.
PET - Polyethylene Terephthalate
DEMPET
Polyester is specially formulated to provide improved toughness, and enhanced machinability. This PET polyester also offers excellent sliding and wear properties, and a low coefficient of friction. DEMPET’s superior chemical resistance, non-staining characteristics, and distinct lack of centreline porosity, makes it a desirable material for a variety of applications especially in the food industry that might involve solvents, cleaning chemicals, or direct food contact.
Black DEMPET also offers improved UV protection for external use applications.
- Very high strength
- Good chemical resistance
- Good weldable and bondable
- Easy to polish
- Good slide and wear properties
- High toughness
- Good machinability
Vesconite
Is a high-performance replacement for bushing and bearing materials. Offering a combination of high load-bearing strength, low friction and low wear. Vesconite, even in harsh and dirty working environments also does not require manual lubrication.
Vesconite has high dimensional stability, retains its strength under wet or damp conditions. and also displays negligible creep under high load.
- Internal lubrication
- High wear resistance
- High load bearing strength
- Dimensional stability
- Low friction
- Temperature limits
- Vesconite is suitable for continuous use at 100 – 120°C in dry conditions and 60 – 70°C in wet conditions
- Shaft friendly
- Good chemical resistance
Phenolic Fabric Laminate
Medium weave fabric base for mechanical use with low voltage electrical properties.
- NEMA-C
- CELERON
- Voltage: 20 kV
- 120°C Continuous
- 130°C Intermittent
- Colour: Brown or Tan
Applications: Spacers, base and side plates, simple jigs and fixtures, in addition to usual range of electrical insulation components.
Tufnol
Tufnol products also available (Whale, Crow, Carp) see the Tufnol rage sold in conjunction with DEMS range of laminates.
Phenolic Paper Laminate
Shrike
Low voltage paper base grade for electrical applications.
- NEMA: X
- Bakelite
- Colour: Brown
- Voltage: 40 kV
- Temperature: 120°C
Applications: Spacers, base and side plates, simple jigs and fixtures, in addition to usual range of electrical insulation components.
Barbet
High voltage paper base grade for electrical use with adequate mechanical properties and very low moisture absorption.
- NEMA: XXX/P3
- Bakelite
- Colour: Brown
- Voltage: 40 kV
- Temperature: 120°C
Applications: Spacers, base and side plates, busbar supports, high voltage electrical thermal boards.
Tufnol
Tufnol products also available (Whale, Crow, Carp) see the Tufnol rage sold in conjunction with DEMS range of laminates.
Silicone Glass Laminate
Silicone glass is a laminated plastics material made from woven glass fabric, bonded with silicone resin. It is a rigid sheet material with good resistance to high temperatures, good electrical insulation properties, especially in applications involving high frequencies.
- BS EN 60893-3-6 Type SI GC 202
- Colour: White
- Electric strength, edgewise in oil at 90°C: 65 kV
- 200°C Continuous
- 240°C Intermittent
Applications: Class H electrical equipment, or used on a conveyor carrying components through a hot oven process.
Epoxy Glass Laminate
Epoxy Glass Fabric Laminate is bonded with a high quality epoxy resin containing flame retardant additives. It has a high mechanical strength with very low moisture absorption and it offers excellent electrical insulation properties.
- NEMA LI-1 Type FR4
- Colour: Translucent or Green or Yellow
- Voltage: >50 kV
- Temperature: 160°C
Applications: Spacers, wear strips, bushes, insulation panels, furnace insulation, heat sealing strips, high MPa.
Polyester Glass SG200
SG200 is a high temperature polyester laminate that shows excellent retention of electrical properties and mechanical properties at elevated temperature ranges.
- NEMA L1 GP01
- Colour: Cream
- Thermal classification: 210°C (H)
- Edgewise parallel: 50 kV
Applications: High voltage transformers, D.C. motors and elsewhere when materials with high thermal indices are required.
Polyester Glass GPO3
Polyester Glass Mat for excellent electrical & mechanical applications. Polyester Glass Mat is flame retardant with excellent arc & track resistance.
- NEMA LI-1 GPO-3
- Colour: Red or Pink
- Class F electrical insulation
- UL Recognized
- Max Working temperature: 155°C
Applications: Busbar support, arc chute, LV & HC circuit breakers.
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