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Problem & Solution

Practical answers to common plastic material challenges

1439 questions
Q
Silver streaks caused by moisture in PU processing
A
Silver streaks are caused by moisture vaporization and stretching; drying and venting are the main countermeasures
Material Drying PU injection silver streaks moisture drying venting back pressure
Q
Bubbles in PU Injection Molded Thick-Walled Products
A
Thick-wall bubbles are caused by a combination of insufficient holding, moisture and poor venting
Material Drying PU injectionbubbleholding pressurethick-walled productmold venting
Q
Silver Streaks Caused by Moisture in EVOH Processing
A
Silver streaks are caused by moisture vaporization and stretching; drying and venting are the main countermeasures
Material Drying EVOH injectionsilver streakmoisture dryingventingback pressure
Q
EVOH barrier property decreases after moisture absorption
A
EVOH moisture absorption causing a sharp drop in barrier property is its inherent characteristic, requiring sandwich structure protection
Material Drying EVOH moisture absorption barrier property decrease OTR sandwich structure humidity protection
Q
EVOH '2079851475616104452 thick-wall bubbles
A
Thick-wall bubbles are caused by a combination of insufficient holding pressure, moisture, and poor venting
Material Drying EVOH injection bubbles holding pressure thick-wall product mold venting
Q
EVA foam cells are uneven
A
Cell uniformity depends on blowing agent dispersion and crosslinking uniformity
Material Drying EVA foam uneven cells blowing agent masterbatch crosslinking uniformity mold temperature control
Q
Silver streaks caused by moisture in EVA processing
A
Silver streaks are caused by moisture vaporization and stretching; drying and venting are the main countermeasures
Material Drying EVA injection silver streaks moisture drying venting back pressure
Q
Bubbles in EVA injection molded thick walls
A
Thick wall bubbles are caused by insufficient holding pressure, moisture and poor venting combined
Material Drying EVA injection bubbles holding pressure thick wall products mold venting
Q
EMA hydrolysis aging
A
Hydrolysis aging is caused by polar groups being sensitive to water; selecting low polarity grade is key
Material Drying EMA hydrolysis aging polar groups anti-hydrolysis stabilizer waterproof coating
Q
EMA Processing Moisture Causes Silver Streaks
A
Silver streaks are caused by moisture vaporization and stretching; drying and venting are the main countermeasures
Material Drying EMA injection silver streaks moisture drying venting back pressure
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