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Problem & Solution

Practical answers to common plastic material challenges

11636 questions
Q
Tiger Skin Pattern on CMC Surface
A
Tiger skin pattern is caused by unstable injection front; multi-stage injection and high mold temperature are the key
Injection Molding CMCtiger skin patterninjection speedmulti-stage injectionmold temperature control
Q
Bacterial Degradation of CMC Solution
A
CMC aqueous solution is easily degraded by bacteria and needs preservation and refrigeration
Material Analysis CMC bacterial degradationpreservativerefrigerated storageutensil disinfectionsolution storage
Q
Low Elongation at Break of CMC
A
Low elongation at break is caused by low molecular weight and orientation; selecting high MW and reducing orientation are the key
Material Analysis CMCelongation at breakmolecular weightorientation controlcrosslinking degree
Q
Large Compression Set of CMC
A
Large compression set is caused by insufficient crosslinking; increasing crosslinking degree is the key
Molding Process CMCcompression setcrosslinking degreeelastic recoveryreinforcing filler
Q
Surface Blooming of CMC
A
Blooming is caused by low-molecular migration and exudation; selecting a high-molecular-weight grade is fundamental
Production & Quality CMCbloominglow-molecular migrationhigh molecular weightlubricant exudation
Q
Surface Stress Whitening of CMC
A
Stress whitening is caused by orientation and internal stress; reducing orientation and annealing are the key
Molding Process CMCstress whiteningorientation stressannealing treatmentstress concentration
Q
Fast Thermal Aging of CMC
A
Thermal aging is caused by thermal oxidation; improving the antioxidant system is the key
Material Analysis CMCthermal agingthermal oxidationantioxidanthigh molecular weight
Q
Insufficient Mixing of CMC
A
Insufficient mixing is caused by improper screw design; increasing the mixing section is the key
Processing Machinery CMCinsufficient mixingscrew mixing sectionkneading blocksside feeding
Q
Poor Fatigue Resistance of CMC
A
Poor fatigue resistance is caused by insufficient recovery and fast crack propagation; increasing crosslinking is the key
Molds & Tooling CMCfatigue resistancecrosslinking degreemolecular weightstress concentration
Q
CMC Angle Deviation
A
Angle deviation is caused by shrinkage and insufficient design compensation; pre-compensation is the key
Molds & Tooling CMCangle deviationshrinkage compensationmold designfull cooling
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