Problem & Solution

Practical answers to common plastic material challenges

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Q

LDPE Blown Film Spiral Instability

A

For spiral instability the formulation route is the first choice; high molecular weight plus branched structure is the molecular basis of film bubble stability; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post LDPE;blown film;spiral instability;melt strength;molecular weight

Q

LDPE Film Wet Marks

A

The radical cure for LDPE film wet marks lies in the cooling rate; roll temperature, speed, and die lip temperature are three parameters linked to lower the temperature; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post LDPE;cast film;wet marks;cooling rate;roll temperature

Q

LDPE High Fluidity Utilization

A

The high fluidity of LDPE is a double-edged sword; use it to solve filling problems, but don't expect it to make precision parts; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molding Process LDPE;fluidity;thin wall;hot runner;tolerance

Q

LDPE Shrinkage 2-5%

A

LDPE shrinkage varies in grades with density; mold design must first determine the density grade, so that the allowance has a basis; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling LDPE;shrinkage;2-5%;density;allowance

Q

LDPE vs PP Selection

A

Select PP for heat-resistant applications, and LDPE according to the temperature boundary; 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 similar prob...

Processing Machinery LDPEPPheat resistanceselection

Q

LDPE Ice Bag

A

Frozen packaging uses low-temperature-resistant film; 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 similar problems in the future

Processing Machinery LDPEice baglow temperatureseal

Q

LDPE Anti-UV Modification

A

Outdoor LDPE must be anti-UV modified; 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 similar problems in the future

Processing Machinery LDPEanti-UVagingcarbon black

Q

LDPE Antistatic

A

Electronic packaging uses antistatic film; 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 similar problems in the future

Processing Machinery LDPEantistaticelectronic packagingsurface resistance

Q

LDPE Blending Modification

A

Blended material relies on ratio and dispersion stability; 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 similar problems in the future

Processing Machinery LDPELLDPEblendingratio

Q

LDPE vs HDPE Selection

A

LDPE and HDPE divide work according to rigidity requirements; 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 similar problems in the future

Processing Machinery LDPEHDPErigidityselection

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All Topics 11636 Material Drying 1439 Injection Molding 1506 Molding Process 740 Molds & Tooling 1506 Processing Machinery 2025 Extrusion & Post 2239 Blow Molding 315 Thermoforming 141 Material Analysis 1343 Production & Quality 382