Notched impact behavior: machined versus molded notches

Pendulum impact tests, such as the cantilever Izod Impact Resistance Test, are used commonly to measure the overall energy associated with failure of a notched injection-molded specimen. While machined notches are used most commonly, some pendulum impact test procedures do have provisions for molded...

Full description

Saved in:
Bibliographic Details
Published in:Plastics world 1997-07, Vol.55 (7), p.19-20
Main Author: Malloy, R A
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Pendulum impact tests, such as the cantilever Izod Impact Resistance Test, are used commonly to measure the overall energy associated with failure of a notched injection-molded specimen. While machined notches are used most commonly, some pendulum impact test procedures do have provisions for molded-in notches. Molded-in notches provide a more realistic indication of the impact performance that could be expected from a material/molded part, because most corners (or other areas having a geometric stress concentration) have molded, rather than machined, radius values. Representative Izod-type impact data for PC, PP, and 40% talc-filled PP are provided.
ISSN:0032-1273