Problema e solução

Respostas práticas para os desafios comuns dos materiais plásticos

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Q

PET regrind ratio 25%

A

25% is the general upper limit for PET regrind; the three managements of drying, ratio, and application grading stabilize the use value of regrind; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PET；regrind；25%；IV；batch stability

Q

PET recycled bottle flake processing

A

Recycled bottle flake processing is a complete chain of washing, crystallization, drying, and filtration; failure of any link manifests as defects; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PET；recycled bottle flakes；washing；crystallization；filtration

Q

PET glass fiber engineering parts

A

Electrical skeletons are selected as special grades according to CTI and flame retardant ratings; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subse...

Processing Machinery PETglass fiberCTIelectrical skeleton

Q

PET material change cleaning temperature

A

High-temperature material change requires purging at the same temperature before lowering the temperature; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference ...

Processing Machinery PETmaterial changecleaninggel particle

Q

PET melt actual measurement

A

Acetaldehyde control must be based on the actually measured melt temperature; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems

Processing Machinery PETmelt actual measurementacetaldehydecorrelation

Q

PET winter water temperature control

A

The cooling water temperature has a lower limit, and overcooling is as harmful as overheating; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subseque...

Processing Machinery PETcooling water temperaturestresscracks

Q

PET barrel temperature zoning

A

The temperature gradient and back pressure ensure complete PET plasticizing; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems

Processing Machinery PETbarrel temperatureplasticizinggel particle

Q

PET melt temperature range

A

The melt temperature upper limit is constrained by both degradation and acetaldehyde; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent simila...

Processing Machinery PETmelt temperatureacetaldehydedegradation

Q

PET workshop dust contaminating preforms

A

Food-grade preforms have high cleanliness requirements; enclosure and clean workshop management are the common guarantee for hygiene and appearance quality.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PET；preform；dust；cleanliness；hygiene；conveying

Q

Poor PET colorant dispersion

A

Coloring quality depends on the dispersibility of the color masterbatch and the stability of metering; optical appearance products should use special color masterbatch and establish color difference control standards.; after confirming effectiveness, solidify the parameters and practices into the...

Processing Machinery PET；coloring；color masterbatch；dispersion；color difference

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