Patented Process Allows Deep-Draw Thermoforming of TPE
Canadian Plastics
PBM Plastics has succeeded in forming Riteflex thermoplastic elastomer (TPE) from Ticona into deep-draw liners and containers with width-to-depth ratios as great as 1:4 and walls as thin as 0.002 in. PBM accomplished this with its patented Melt-Ph...
PBM Plastics has succeeded in forming Riteflex thermoplastic elastomer (TPE) from Ticona into deep-draw liners and containers with width-to-depth ratios as great as 1:4 and walls as thin as 0.002 in. PBM accomplished this with its patented Melt-Phase Forming process, which allows for deeper drawing and thinner walls than conventional thermoformers can achieve.
“I believe this is the first time a copolyester elastomer has been drawn as deeply as 1:4,” says PBM president Adam Burke. “Our goal in this is to extend the use of Riteflex TPE beyond that possible with traditional thermoforming to gain hydrocarbon barrier properties, flexibility and durability in seamless liners and barriers.” He suggests thin, deep Riteflex TPE forms would be suitable as collapsible bladders for paints, sealants, adhesives, and other hard-to-dispense industrial liquids.
The Melt Phase Forming process combines characteristics of thermoforming, blow molding and injection molding. “We draw a polymer at or beyond its melt termperature. As a result, the liners and containers have almost no inherent stress and resist distortion when reheated or retorted,” explains Burke.
In addition, the process creates a precision flange for the liner that allows for airtight and watertight seals.
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