Page 111 - Engineering Plastics Handbook

Polyacetals 85

TABLE 5.2 Polyacetal Products (Continued)
Pulley wheels
Radiator caps
Refrigerator bin and shelf parts
Rollers
Seat belt components, e.g., buckles, retractor covers, release buttons
Seat levers
Self-tapping screws
Sensor housings
Shaver cartridges, handles
Ski boot bindings
Slide guides for bureau and desk drawers
Snap-fit components
Soft-touch applications
Spacers
Speaker grills
Spring levers
Sprockets
Steering column components
Sun visor brackets
Switches, electrical
Tea kettles, electric
Telephone components
Tennis racket handles
Trim clips
Turn signal handles, cruise control handles
Toys
Valves, hydraulic, pneumatic, e.g., rollover gas shutoff valves
Washers
Water jugs
Window brackets, cranks, guide strips, support brackets
Windshield wiper blade holders, bezels, pivots
Windsurfing board frames
Zippers

Improved paint adhesion on an acetal homopolymer substrate is sup-
plied by DuPont Engineering Polymers. The substrate is composed of
®
90 to 99.5% Delrin and 0.5 to 10% of another semicrystalline or amor-
phous thermoplastic. Typically, polyacetal does not readily adhere to
other plastics. The painted polyacetal composition has good physical
and mechanical property retention according to the company. In 2003
™ ®
the company introduced DuPont Delrin Decorating Solutions for
painted and metallized (electroplated) homopolymers which consist of
®
Delrin ES Etching Solution, coatings, and application technology.
®
Delrin ES technology prepares the molded product surface for coating
or metallizing. Shipley Company, a subsidiary of Rohm and Haas
®
Company, has licensed the manufacturing process for Delrin Etch
etching solution from DuPont [8]. The DuPont painting and plating