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문제 및 해결책

일반적인 플라스틱 재료 문제에 대한 실질적인 답변

11636 질문
Q
Difficult demolding in PVA '2079851475616104452
A
Difficult demolding is caused by adhesion and insufficient mold design; increasing draft angle is the fundamental measure
Injection Molding PVA injection difficult demolding draft angle adhesion ejection design
Q
Elliptical deformation of PU products
A
Elliptical deformation is caused by asymmetric demolding force; uniform ejection is key
Molds & Tooling PU elliptical deformation symmetric ejection uniform cooling setting time
Q
Internal delamination cracking of PU
A
Internal delamination is caused by poor interface and shrinkage difference; compatibilizer and uniform cooling are key
Extrusion & Post PU internal delamination interfacial bonding compatibilizer uniform cooling
Q
Poor resilience of PU flexible foam
A
PU flexible foam resilience is determined by isocyanate index and catalyst formulation
Material Analysis PU flexible foam resilience isocyanate index catalyst foam density
Q
Internal black speck carbonization of PU
A
Black specks are caused by thermal carbonization and carbon deposits; temperature reduction and regular cleaning are key
Processing Machinery PU internal black specks thermal carbonization screw cleaning temperature control
Q
Snakeskin pattern on PU surface
A
Snakeskin pattern is caused by low-temperature extrusion and elastic recovery; raising temperature and reducing speed are key
Extrusion & Post PU snakeskin pattern extrusion temperature elastic recovery die temperature control
Q
Severe excessive orientation of PU
A
Excessive orientation is caused by fast unidirectional flow; speed reduction and multi-point gates are key
Injection Molding PU excessive orientation injection speed multi-point gates performance difference
Q
Low flexural modulus of PU
A
Low flexural modulus is caused by material softness and insufficient filler; adding rigid filler is key
Material Analysis PU flexural modulus rigid filler nucleating agent crystallinity
Q
Twisting deformation of PU products
A
Twisting deformation is caused by asymmetric cooling; symmetric cooling is key
Molds & Tooling PU twisting deformation symmetric cooling gate arrangement annealing
Q
PU hydrolytic aging
A
Hydrolytic aging is caused by polar groups being sensitive to water; selecting low polarity grade is key
Material Analysis PU hydrolytic aging polar groups anti-hydrolysis stabilizer waterproof coating
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