I. Core differences in heating rates among different material categories:
High heat-resistant and stable general-purpose materials (PP, PE, ABS, PS): Fastest heating rate, reaching 3-4℃/min, allowing 100% full power output throughout, with no significant risk of overheating degradation.
Medium heat-resistant engineering materials (PC, PA6, PA66, PMMA): Moderate heating rate, 2-3℃/min, requiring 80% power output limitation after 100℃ to avoid molecular chain breakage due to temperature overshoot.
Highly degradable and sensitive materials (PVC, POM, PET, TPU): Slowest heating rate, only 1-1.5℃/min, requiring 60%-70% power limitation throughout to prevent rapid material decomposition due to short-term overheating.
II. Differences in Heating Rates Among Different Sub-materials within the Same Major Category
For General-Purpose Materials: PP has the highest upper limit for heating rate, reaching 4℃/min; PE has a slightly lower upper limit of 3.5℃/min.
For Engineering Materials: PA66's heating rate can be relaxed to 3℃/min; PC's upper limit is only 2.5℃/min, requiring higher temperature uniformity.
For Sensitive Materials: PVC has the lowest heating rate, only 1~1.2℃/min; POM and TPU's heating rates can be relaxed to 1.5℃/min.
III. Differences in Heating Rates of Specially Modified Materials
Glass Fiber Reinforced Materials: Heating rate is 10% higher than pure resin with the same base material. Glass fiber itself has no risk of thermal degradation, so the heating rate can be appropriately accelerated.
Highly Filled Materials: Heating rate is 20% lower than pure resin with the same base material to avoid uneven heating of the melt in the flow channel and poor filling dispersion caused by rapid heating.
Optical grade transparent material: The heating rate is reduced by 30% compared to pure resin of the same substrate to ensure that the temperature difference throughout the flow channel is ≤±2℃, thus avoiding poor light transmission and stress marks in the product.
