Sabic Ultem PEI Polyetherimide (PEI) Resin Provides Lightweight Comfort for Augmented Reality EyeGlasses


Beijing LLVision Technology Co., Ltd., provides eyeglasses  for hearing loss compensation and spoken language translation. The augmented reality (AR) eyeglasses display voice translations in text on the lenses in real time. The company’s LEION Hey glasses feature legs (or temples) molded from SABIC’s tough, lightweight and inherent, non-halogenated flame-retardant ULTEM™ 1000 resin. ULTEM resin enables thin-wall molding of the hollow legs, which contain both a lithium-ion battery and a computer chip to enable rapid, multi-language translations. SABIC’s innovative material helped LLVision minimize the weight of the legs to give users all-day comfort, while providing high strength that enables key components to be integrated into the legs with maximum functionality.

With all the components required for AR glasses, including the optical module, microphone and computer chip, it was a difficult challenge to make the glasses lightweight. 

Lighter Legs

During LLVision’s selection process, ULTEM resin surpassed incumbent materials used for eyeglass legs, such as amorphous polyamide (PA) resin. SABIC’s polyetherimide (PEI) material provides a balance of ductility and stiffness that enables thin-wall molding to cut weight by up to 30 percent vs. PA and provide more space for embedded components. This specialty resin also provides better dimensional stability than PA for efficient assembly, and delivers combined stiffness and strength that allows the legs to clamp securely to the wearer’s head. ULTEM resin’s flame retardance enhances the safety of devices that incorporate electronic components, and the non-halogenated formulation avoids the use of chlorine and bromine, which are associated with adverse health and environmental effects. 

ULTEM 1000 resin is an unreinforced, general-purpose grade offering high heat resistance, high strength and modulus, and broad chemical resistance. It is rated for fire safety under the UL94 V0, V2 and 5VA standards. SABIC supplies the material to LLVision in a custom gray color. In addition, SABIC has a broad portfolio of other materials well suited for eyeglass frames and legs depending on customers’ design needs.


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