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Best Plastics for Medical Sterilization Trays: PEEK, PEI, or PPSU?

Medical sterilization trays must survive repeated autoclave cycles (134 C steam, 2-3 bar pressure), resist aggressive chemicals (hydrogen peroxide plasma, ethylene oxide), and maintain dimensional stability. Here is the material selection guide.

Autoclave Cycle Survival Comparison

Property	PEEK K12N	PEI I12N (Ultem)	PPSU
Max Autoclave Temp	250 C	180 C	180 C
Cycles to Degradation	>5000	~2000	~1500
Chemical Resistance	Excellent	Good	Very Good
Relative Cost	100% base	45-55%	35-45%

Recommendation by Application

PEEK K12N: Premium Choice

For neurosurgery, cardiac surgery, and ophthalmology trays where sterility assurance is critical and budget allows. Autoclavable >5000 cycles. NAGOMER supplies medical-grade PEEK sheets (ISO 10993 certified on request).

PEI I12N (Ultem): Balanced Performance

Most popular choice for general surgery trays. 180 C autoclave rating covers standard steam sterilization. Transparent amber allows visual inspection of tray contents.

Request NAGOMER medical plastic samples: sales@nagomer.com | ISO 13485 certified facility available.