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Cellulosic Acetate Propionate (CAP) as an alternative to Polycarbonate for Face Shields

IP.com Disclosure Number: IPCOM000247873D
Publication Date: 2016-Oct-07
Document File: 3 page(s) / 959K

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The IP.com Prior Art Database

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Cellulosic Acetate Propionate (CAP) as an alternative to Polycarbonate for Face Shields

Polycarbonate has been a favorite material choice for making face shields due to its toughness and clarity. Cellulosic Acetate Propionate (CAP) is also used in making face shields for applications requiring chemical resistance.

Besides being chemically resistant, certain grades of CAP also demonstrate superior flow characteristics in injection molding. This attribute enables face shields to be injection molded at ~50% thinner in gauge than face shields injection molded from polycarbonate with better birefringence.


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CAP also possesses excellent toughness. Our test shows that injection molded plaques made of CAP can pass high speed impact test outlined in ANSI87.1+ at reduced gauge.


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The combination of light-weighted part, ANSI87.1+ impact rating, and inherent chemical resistance makes the proposed solution an effective alternative to the mainstream choice of polycarbonate for face shields.