Problem & Solution

Practical answers to common plastic material challenges

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Q

TPE extrusion surface roughness

A

TPE extrusion roughness is troubleshooted along the three lines of equipment, temperature, and drying; mixing capacity is the core equipment indicator; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post TPE；extrusion；roughness；mixing；plasticization

Q

TPE uneven color

A

TPE color matching relies on carrier compatibility and back pressure dispersion; coupling agents are a chemical means to improve bonding; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying TPE；uneven color；color masterbatch；back pressure；coupling agent

Q

TPE burnt and air traps

A

TPE burnt treatment prioritizes venting; speed control is a supporting means, and carbon deposit cleaning is routine maintenance; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Injection Molding TPE；burnt；air trap；venting；injection speed

Q

TPE poor demolding

A

Anti-sticking design for soft TPE demolding; 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 problems later

Molds & Tooling TPEdemoldingmold stickingdraft

Q

TPE flow marks and uneven gloss

A

TPE flow marks are treated by type; for narrow marks increase speed and temperature, for wide marks enlarge the gate, for different-phase marks increase temperature and reduce speed; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling TPE；flow mark；gloss；injection speed；gate

Q

TPE burrs and flash

A

For TPE flash, check filling, mold, and clamping; high-fluidity materials have higher mold precision requirements; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Injection Molding TPE；burr；flash；parting line；clamping force

Q

TPE voids and sink marks

A

Voids and sink marks rely on holding pressure and wall thickness; 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 problems later

Processing Machinery TPEvoidssink marksholding pressure

Q

TPE aging performance decline

A

TPE aging is an inherent shortcoming of the molecular structure; stabilizer delay and SEBS replacement are the two ways out; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Processing Machinery TPE；aging；SBS；SEBS；stabilizer

Q

TPE sticky surface exudation

A

TPE stickiness is a dual signal of formulation and process; troubleshoot along the three lines of temperature, shear, and formulation; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Analysis TPE；stickiness；exudation；low molecular；filling oil

Q

TPE silver streaks dominated by moisture

A

For TPE silver streaks, suspect drying first; the 0.1% red line plus an insulated hopper can eliminate 95% of silver streaks; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying TPE；silver streak；moisture；0.1%；drying

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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