Engineering Plastics

William Johnston & Company Limited supply a variety of engineering plastic products for use across many industrial applications.

Please see the details below.

SHEET

BILLET

ROD

TUBE


ENGINEERING PLASTIC FUNCTIONALITY APPLICATIONS
ABS Outstanding impact resistance
Good machinability
Easy to thermoform
Easy to bond with adhesives
Strong and stiff
Low cost
Display trays, Storage cases,
Display bases, Product holders,
Point-of-purchase displays
Thermoformed displays
Display components
Models and prototypes
Machine housings, guards, and covers
Instrument panels
Thermoformed trays and tote bins.
ACETAL Strong and stiff
Excellent machinability
Good dimensional stability
Low moisture absorption
Excellent wear properties in both wet and dry environments
Low friction
Good chemical resistance
Bearings and bushings
Pump and valve parts
Manifolds
Gears
Jigs and fixtures
Packaging machinery parts
Food processing machinery parts
Electrical components
ACRYLIC Optically clear
Strong and stiff
Easy to fabricate
Easy to solvent bond
Signs
Point-of-purchase (POP) displays
Sign and graphic holders
Merchandisers, Brochure holders
Table top displays, Shelves, Exhibits
Fixtures, Architectural glazing 
Skylights, Boat windshields
Aircraft canopies, Transparent manifolds
HDPE Easy to weld using thermoplastic welding equipment
Low moisture absorption
Excellent surface for food preparation
Good chemical resistance
Low cost
Chemical tanks
Water pipe flanges (HDPE pipe grade)
Cutting boards for food preparation
Playground equipment
Marine construction
Pile guards, Bumpers, Anti-skid surfaces.
LDPE Soft and pliable
Easy to weld and heat seal
Good chemical resistance
Low cost
Orthotics
Prosthetics
NYLON 6 Excellent bearing and wear properties
Strong and stiff
Good chemical resistance
Easy to machine
Reduced noise, weight, and wear of mating parts compared with many traditional metal bearing materials
Bearings and bushings
Gears
Wear pads
Packaging machinery components
Food processing machinery components
Wheels
Rollers
Seals and gaskets
NYLON 6.6 High mechanical strength, great rigidity, and good stability under heat.
It has a higher melting point than Nylon 6, better mechanical properties and greater hardness. It has lower rate water absorption and is therefore more suited for components that have to meet close tolerances and is well suited for machining on automatic lathes.
Bearings and bushes
Gears
Wear pads
Packing machinery components
Food processing machinery components
Ball bearing cages
Electro-insulating elements
PBT Excellent chemical resistance including resistance to many CIP (clean in place) wash-down solutions
Low moisture absorption
Excellent wear resistance, even in wet environments
Excellent machining characteristics
Stain resistance
Internally lubricated bearing grades
Valves
Filler pistons
Bearings and bushings
Gears
Wear pads
Packaging machinery parts
Food processing machinery components
Wheels
Rollers
Electrical components
PEEK Strong and stiff plastic
Outstanding chemical resistance
Good mechanical properties at elevated temperatures
Resistant to hot water and steam
Bearing grade PEEK has excellent wear characteristics
UL 94 V-0 flammability rating (1.5mm) 
Very low smoke and toxic gas emissions when exposed to flame
Semiconductor machinery components
Aerospace parts
Seals
Pump and valve components
Bearings and bushings (bearing grade PEEK)
Electrical components
Medical instrument parts
Food processing machinery components
PET Strong and stiff
Excellent chemical resistance
Resistant to many CIP (clean in place) wash-down solutions
Low moisture absorption
Low thermal expansion
Excellent wear characteristics, even in wet environments
Stain resistance
Valve components
Manifolds
Filler pistons
Bearings and bushings
Wear pads
Packaging and machinery parts
Food processing machinery components
Wheels
Rollers
Electrical components
PETG Outstanding thermoforming characteristics, particularly in deep draw applications
Does not require drying prior to thermoforming
Good impact resistance
Clear
Lower cost alternative to polycarbonate
Less brittle than acrylic
Superior chemical resistance when compared with many other transparent plastics
Easy to fabricate
Rapid thermoforming cycle times
Brake formable (up to 0.080" thickness)
Signs
Sign and graphic holders
Point of purchase (POP) displays
Merchandisers
Table top displays
Table tents
Product displays
Trays
POLYCARBONATE Outstanding toughness
Good optical clarity
Strong and stiff
Easy to fabricate
Thermoforms well after drying
Replaces acrylic and PETG in high impact applications
UL 94 V-0 flammability rating (5.6mm thickness, clear)
Brake formable (up to 2.54mm thickness)
Easy to solvent bond
Signs
Sign and graphic holders
Point-of-purchase (POP) displays
Product displays
Merchandisers
Risers
Table top displays
Table tents
Exhibits
Shelves
Fixtures
Machine guards
Architectural glazing
Skylights
Transparent manifolds
Site glasses
Semiconductor machinery components
POLYPROPYLENE Easy to weld using thermoplastic welding equipment
Low moisture absorption
Good chemical resistance
Low cost
Extremely tough (copolymer)
Excellent aesthetic properties
Easy to fabricate
Chemical tanks
Plating tanks
Fire truck water tanks (copolymer polypropylene)
Cutting boards for food preparation
Semiconductor equipment cabinets and work surfaces
POLYURETHANE Absorbs impact and vibration
Resilient and tough
Abrasion resistant
Can be cast into a variety of shapes and finished parts
Can be cast directly onto metal wheels and rollers
Bumpers
Wheel covers
Roller covers
Snow plow edges
Screen printing squeegees
Packaging machinery components
Assembly fixtures, checking fixtures, and storage fixtures
PTFE Outstanding chemical resistance
Extremely low friction
Soft and formable
Good bearing and wear properties (bearing grade)
Good weathering resistance
Performs well at elevated temperatures
Seals and gaskets
Valve and fitting components
Pump parts
Manifolds
Semiconductor equipment
Scientific equipment
Medical equipment
Chemical resistant tubing
Bearings and bushings (bearing grades)
PVC Strong and stiff
Low cost
Easy to weld using thermoplastic welding equipment
Easy to join using solvents or adhesives
Welded tanks
Manifolds
Valve and pump housings
Fittings
Piping systems
Cabinets and working surfaces
PVDF Excellent chemical resistance
High purity
Easy to weld using thermoplastic welding equipment
Good UV stability
Flame resistant
Abrasion resistant
Chemical tank liners
Semiconductor equipment components
Pump and valve parts
UHMW-PE Extremely tough and durable
Low friction
Excellent abrasion resistance
Good chemical resistance
Low moisture absorption
Easy to fabricate
Chute liners and hopper liners
Wear strips
Star wheels
Idler sprockets
Packaging machinery components
Food processing machinery components
Marine construction
Pile guards
Bumpers
Anti-skid surfaces

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Contact William Johnston & Company Limited

For more information about our Engineering Plastic products that are available world wide, contact us on +44 (0)141 620 1666, Email us or simply complete our online Enquiry Form.

Failure to select the correct materials or products can result in damage to plant and equipment and personal injury. In specific applications, particularly where critical conditions exist, we suggest you contact us and we will consider with you the most suitable material or product. However, information supplied by William Johnston & Company Limited is intended only as technical co-operation and as a guide to the various uses of different products. No warranty is given in respect of information or recommendations by William Johnston & Company Limited which are only given for guidance and without any guarantee. The customer must satisfy themselves on the suitability of the material or product for the intended purpose. The correct fitting of products is the responsibility of the customer.

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