Production & Quality
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Product toughness greatly reduced at low temperature (below -10°C)
Problem Phenomenon
Products undergo brittle fracture in winter or low-temperature environments
Cause Analysis
The PP matrix significantly embrittles below its embrittlement temperature (-10~0°C); stress concentration at fiber ends more easily triggers fracture at low temperature; the interface embrittles at low temperature
Solution
Use high-impact copolymer PP as the matrix (PP-B or PP-R); add elastomer toughening (POE, EPDM); reduce glass fiber content or shorten fiber length to reduce stress concentration
Key Takeaway
Low-temperature toughness is the main constraint for LGFPP applications in outdoor and low-temperature environments
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