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문제 및 해결책

일반적인 플라스틱 재료 문제에 대한 실질적인 답변

2239 질문
Q
EVOH film printing adhesion is poor
A
Poor printing adhesion is caused by insufficient surface polarity; corona treatment and special ink are key
Extrusion & Post EVOH film printing adhesion corona treatment special ink surface tension
Q
EVOH extruded film longitudinal stripes
A
Q
EVOH extruded profile bending deformation
A
Profile bending is caused by uneven cooling and uneven flow velocity; uniformization and alignment are the key to solution
Extrusion & Post EVOH extrusion bending deformation uniform cooling uniform flow velocity sizing sleeve
Q
EVOH film blocking and delamination difficulty
Q
EVOH extruded film thickness uniformity is poor
A
Film thickness uniformity requires coordinated optimization from die design, gap adjustment, and cooling
Extrusion & Post EVOH film thickness uniformity die design extrusion swell air ring cooling
Q
EVOH extrusion dimensions are unstable
A
Extrusion dimensional stability depends on feeding accuracy, temperature control, and traction synchronization
Extrusion & Post EVOH extrusion dimensional stability feeding control temperature PID traction synchronization
Q
EVOH film heat shrinkage rate is too large
A
Film heat shrinkage is caused by orientation freezing; reducing draw ratio and annealing treatment are key
Extrusion & Post EVOH film heat shrinkage orientation release annealing treatment biaxial stretching
Q
EVOH extrusion die drool carbon deposits
A
Die carbon deposits are caused by thermal oxidation and untimely cleaning; PE flushing and timely cleaning are key
Extrusion & Post EVOH extrusion die carbon deposit PE flushing stagnation zone thermal oxidation
Q
EVOH extrusion pelletizing connected pellets
A
Connected pellets are caused by elastic recovery and low-temperature pelletizing; high-temperature water cutting and fast cutting are key
Extrusion & Post EVOH pelletizing connected pellets pelletizing water temperature cutter speed elastic recovery
Q
EVOH blend delamination with incompatible resin
A
Blends with large polarity differences require reactive compatibilizers forming chemical bonds at the interface to solve
Extrusion & Post EVOH blend delamination polarity difference EVOH-g-MAH reactive compatibilization interfacial bonding
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