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What is the heat resistance temperature of PP plastic?

Time: 2025/06/18

General PP Material

Heat Deflection Temperature The heat deflection temperature of general PP material is usually around 110℃ to 120℃ approximately. This means that at temperatures around 100℃, PP material can maintain good shape and strength.
Long-term Use Temperature PP material can be used long-term at temperatures around 100℃ .
Melting Point The melting point of PP material is usually between 160℃ to 170℃ . When the temperature approaches the melting point, PP material begins to soften and gradually lose its shape.

Modified PP Material

By adding fillers (such as glass fiber, talcum powder) or using modifiers, the heat resistance of PP material can be significantly improved:

Heat Resistance Temperature After Modification The heat resistance temperature of modified PP material can be increased to 130℃ to 140℃ , or even higher.
Reinforced Material For example, PP material with added glass fiber can have a heat resistance temperature reaching 158℃ to 163℃ 。

Precautions in Practical Applications

Short-term Tolerance Plastic products made of PP (such as water cups, food containers) can tolerate high temperatures close to their heat deflection temperature for a short time, for example, holding hot water at 100℃.
Long-term Use Long-term exposure to high temperature environments can cause PP material to age, deform, or degrade in performance.
Special Scenarios In some high-temperature application scenarios (such as microwave heating), PP material is safe but it is necessary to avoid exceeding its heat resistance limit.

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