Plastic production

Development of Plastics Timeline

development of plastics

> Common Materials

> Plastic Processes

Common Materials

Characteristics:Uses:
Polyethylene (PE)
  • Low Density and High Density
  • Most highly used material at Rubbermaid Commercial Products
  • Used primarily in thin-walled parts
  • High impact resistance
  • Very durable (5 - 10 years, or more)
  • Opaque
  • Less expensive than all other plastics
- Low Density Polyethylene
  • Used at high and low temperatures
  • Relatively flexible
  • Will deform with excess weight
Refuse containers:
Brutes
Slim Jims
Soft Wastebaskets
common materials
Tilt & Cube Trucks
Polyliners
- High Density Polyethylene
  • More rigid than Low Density Polyethylene
  • Supports more weight without deformation
  • More brittle at low temperature than LDPE
Refuse Containers:
Marshals & Rangers
common materials
Lids for Brutes
Step-On Cans
Big Wheel Containers
Some Food Storage Boxes
Mop Buckets and Platform Trucks
Polypropylene (PP)
  • More rigid than both types of polyethylene
  • Not good for low temperatures
  • Ideal for interior applications
  • Resin is slightly more expensive than polyethylene
Various Service Carts
Janitor and Housekeeping Carts
common materials
Mop Wringers
Wall Hanging Containers
Food Storage Containers
Polystyrene (PS)
  • More rigid than either polyethylene or polypropylene
  • Moderate impact strength
  • About same temperature performance as polyethylene
  • Better appearance than either polyethylene or polypropylene
  • Good for interior applications
  • Can be transparent
Untouchable Tops
Slim Jim Wall Mounted Container Tops
common materials
Miscellaneous Parts & Accessories
Polycarbonate (PC)
  • Transparency of crystal
  • Brilliant in colours
  • Impact resistant
  • Moderate rigidity
  • Stain resistant
  • Use temperature -40° to 100°C
  • Scratch sensitive
  • Resin is expensive (approx. 4x Polyethylene)
Bouncer Mugs & Pitchers common materialsAbout Us
Food Storage Containers
Insert Pans
Landmark Security Container Panels
Polyamide (PA) commonly called Nylon
  • Very resistant to chemicals
  • High strength, Very rigid, Very tough
  • Wear resistant
  • High temperature uses
Downward Pressure Wringer components
High Heat Spatula handles
common materials
Various accessories & component parts
Polyetherimide (PEI) (Ultem)
  • Transparent
  • High Temperature resistance
  • Impact resistance
  • Moderate rigidity
  • Use temperature -40° to 190°C
  • Scratch sensitive
  • Resin is expensive (approx. 10x Polyethylene)
High Heat Insert Pans common materials

Plastic Processes

Characteristics:Uses:
Injection Moulding
(See video)
  • Melted resin is forced into mould
  • Most common process used at Rubbermaid Commercial Products
  • High pressure process
  • Used in thin-wall parts
  • Excellent reproduction of details
  • High productivity process
  • Low cycle time
Brutes
plastic processes
Slim Jims
Half-Rounds
Soft Wastebaskets
Max Racks & Utility Carts
Food Storage Boxes
Pitchers & Mugs
Insert Pans
Dual Injection Moulding
  • Special injection moulding process
  • Utilizes two materials
  • Injected into mould separately
  • Results in fused components with differing properties
  • Allows for specialized performance where needed
High Heat Spatulas
plastic processes
Structural Foam Injection Moulding
  • Resin forced into mould with nitrogen gas (foam agent)
  • Lower pressure process
  • Gas voids confer rigidity & reduce weight
  • Products can support weight without deforming
  • Swirled surface appearance from nitrogen
  • Porous; more difficult to clean than structural web
  • Used with polyethylene, polypropylene & ABS
Ranger Refuse Cans
Platform Trucks
Stock Tanks
4500 Utility Carts
Brute Dollies
plastic processes
Structural Web Injection Moulding
  • Similar to Structural Foam Moulding
  • Utilises same equipment & materials
  • Thicker walls with large voids of air
  • Results in hollow channels (web-effect)
  • Reduces weight & maintains strength
  • Smooth surface rather than swirled
Utility Carts
plastic processes
Janitor Cart
Mop Bucket
Wringers
Plaza Containers
Rotational Moulding
  • Resin melted and distributed by centrifugal force in an oven heated mould
  • Well suited to very large products
  • Less detail reproduction (can’t have fine detail)
  • Long cycle time
  • Textured surface
  • Used with polyethylene
Cube Truck 4608
plastic processes
Cube Trucks
Utility Trucks
Rigid Liners
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