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Practical answers to common plastic material challenges

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Q

PEEK Shrinkage Rate and Fiber Orientation Differences

A

PEEK shrinkage is designed in separate tracks by grade, and warpage of filled material relies on the gate to homogenize orientation; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling shrinkage rate fiber orientation warpage mold compensation

Q

Mold Steel Selection Mistake for PEEK

A

H13 is the bottom line of PEEK mold steel — the money saved on a soft mold will be repaid double in accuracy; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding mold steel H13 S136 high-temperature mold

Q

The Limits of Processing PEEK on Ordinary Machines

A

For PEEK processing, first ask whether the machine can reach 400℃ — barely running at full load is a prelude to failure; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding machine capability high-temperature machine equipment selection temperature upper limit

Q

Regrind Proportion of PEEK Exceeding the Limit

A

PEEK regrind limits of 30% for virgin and 10% for filled are the official red line — exceeding them plants hidden dangers; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Production & Quality regrind proportion upper limit heat history filled grade

Q

Shutdown Thermal Stability Management of PEEK

A

PEEK shutdowns are handled in 1-hour/3-hour graded levels, and the first shot after restart must be scrapped; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Processing Machinery shutdown thermal stability purging restart

Q

Stress Annealing of PEEK After Machining

A

The dimensional stability of PEEK precision parts is backed up by stress-relief annealing below 250℃; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post stress annealing machining dimensional stability cracking

Q

The Trade-Off of 300℃ High-Temperature Annealing of PEEK

A

300℃ annealing is a performance-limit means, and the embrittlement and oxidation costs must be evaluated in advance; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post high-temperature annealing embrittlement large-part cracking performance limit

Q

Brown Amorphous Skin Layer and Annealing Crystallization of PEEK

A

Remedy the brown skin layer with the 200℃ procedure annealing, and the heating and cooling rates must be controlled; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Material Drying annealing amorphous skin layer crystallinity heating rate

Q

Transparent Low-Crystallinity Surface Layer of PEEK

A

A transparent surface layer is a signal of low crystallinity — raise the mold temperature or anneal to make up the surface performance; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as...

Molds & Tooling surface crystallization mold temperature annealing chemical resistance

Q

Mold Temperature Below Tg Forming Amorphous Brittle PEEK Parts

A

The 143℃ mold temperature is the crystalline-state boundary of PEEK, and performance parts should take the upper limit with an oil-type mold temperature controller; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling mold temperature glass transition temperature crystallinity amorphous

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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