Problema e solução

Respostas práticas para os desafios comuns dos materiais plásticos

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Q

PVC Shutdown Handling

A

PVC shutdown procedure same principle as POM; replacement and emptying is standard action, omitting it means batch accident; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PVC; shutdown; replacement; PE purging; restart

Q

PVC Shear Heat Exceeding Standard

A

PVC temperature measurement must measure actual melt value, shear heat is the invisible killer; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar prob...

Processing Machinery PVC shear heat screw speed actual measurement

Q

PVC Residence Time Management

A

Residence time is PVC's second red line besides temperature; 40-75% shot ratio plus replacement procedure, neither can be omitted; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PVC; residence time; shot weight; replacement; degradation

Q

PVC Processing Window 160-195℃

A

PVC temperature discipline is the strictest among general-purpose plastics; 200℃ is an untouchable red line, the narrow window determines dual high requirements for equipment and management; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recu...

Processing Machinery PVC; processing window; 160-195℃; 200℃; temperature control

Q

PVC Soft Product Plasticizer Exudation

A

PVC soft material oiling = 'plasticizer compatibility': compatibility and dosage are key; high-molecular plasticizers migrate slowly, the upgrade direction for preventing oiling; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.

Processing Machinery PVC; soft; plasticizer; exudation; sticky

Q

PVC Rigid Pipe Insufficient Impact Resistance

A

PVC rigid pipe impact resistance = 'plasticization + modification system': poor plasticization and insufficient modifier are the two roots; low-temperature impact is the hard indicator of rigid pipe, plasticization and formula must both reach standard.

Processing Machinery PVC; pipe; impact resistance; plasticization degree; modifier

Q

PVC Pipe Sizing Adhesion

A

PVC sizing adhesion = 'exudation management': lubrication balance and melt temperature are key; exudate accumulation is gradual, regular cleaning and formula optimization must go together; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurr...

Processing Machinery PVC; pipe; sizing sleeve; plate-out; pulled damage

Q

PVC Profile Weathering Chalking

A

PVC weather resistance = 'formula system + processing protection': outdoor material needs sufficient titanium dioxide and anti-UV; processing degradation prematurely overdraws weather resistance — formula and process must coordinate.

Processing Machinery PVC; profile; chalking; weather resistance; titanium dioxide

Q

PVC Foam Board Uneven Cells

A

PVC foam board = 'rhythm matching of plasticization and foaming': foaming agent decomposition and plasticization progress must be synchronized; temperature field uniformity and foam regulator are the two pillars of uniform cells.

Processing Machinery PVC; foam board; cell; foaming agent; plasticization

Q

PVC Wire and Cable Compound Surface Particles

A

PVC cable compound particles = 'dispersion + filtration': filler dispersion and screen integrity are the two key passes; cable compound has high surface smoothness requirements, dispersion and filtration must both be in place.

Processing Machinery PVC; cable compound; particle; dispersion; screen pack

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