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Temperature Resistance and Post-Processing Baking Guidelines for Reinforced Injection (RIM) Materials

模型製作, 模型生產, 治具製作廠商, 模具製作廠商, 測試治具製作, 產品模型製作, 模型製作公司, 塑膠模型製作, 模型 翻模, 公仔模型製作, 公仔生產, 客 製 化模型 公仔, 樹脂公仔製作, 矽膠模具製作, pvc模型製作, 金屬模具製作, 模具製作廠商, 簡易模具製作, 塑膠模具製作流程, 矽膠模具製作, 模具開發流程, 模具設計, 塑膠模具製作流程, 模具加工流程, 汐紫模型, 3d列印代工推薦, 3d列印矽膠模具, 橡膠3d列印, 3d列印翻模, 矽膠 翻模 代 工, 3D 列印 代工 學生, 光固化代印價格, 3d列印模型, 3d列印模型製作, 3d列印公仔, 3d列印圖檔製作, 3d列印廠商, 大型3d列印代工

Temperature Resistance and Post-Processing Baking Guidelines for Reinforced Injection (RIM) Materials

Introduction

The temperature resistance of polyurethane (PU) parts produced by the RIM process is a key indicator of their functionality. Furthermore, if the parts require post-processing such as painting, understanding the safe upper baking temperature limit is crucial for ensuring cosmetic quality and preventing part deformation. This article explains the thermal performance limitations of RIM materials.

Post-Processing Paint Baking Limits

First, it is important to note that the structural stability of all PU (polyurethane) materials used for RIM is subject to temperature limitations. To ensure that the paint coating can fully dry and cure without causing softening, deformation, or dimensional loss due to excessive temperatures, the recommended upper baking temperature limit is 60°C. Excessively high baking temperatures can irreversibly damage the dimensional accuracy and structural strength of PU parts.

RIM Material Temperature Resistance

For PU materials used in RIM, the short-term heat resistance temperature (also known as the heat deflection temperature, HDT) is a critical reference. This value represents the maximum temperature a material can withstand in the short term without being subjected to stress.

Generally speaking, the short-term heat resistance temperature of standard RIM PU materials is approximately 70°C–95°C. For higher temperature requirements, specially formulated high-heat-resistant PU materials can be selected, with short-term heat resistance temperatures reaching 100°C–120°C.

Key Concepts

Heat Deflection Temperature (HDT) refers to the temperature at which a sample, under a specific load, undergoes a temperature increase at a fixed rate until it exhibits a specified amount of deformation. It is an indicator of a material’s short-term rigidity and heat resistance, not its safe long-term operating temperature. Generally, the temperature for long-term continuous use is approximately 60%–80% of its HDT value.

Conclusion

In summary, PU parts produced by RIM are an excellent solution for functional verification and low- to medium-volume production, but their temperature resistance is generally lower than that of some high-temperature engineering plastics. When performing any heating or post-processing steps, consider 60°C as a safe upper baking temperature limit. If your product application requires higher temperature resistance, discuss this with the manufacturer early in the project and select a high-heat-resistant PU material to ensure the integrity and dimensional accuracy of the final product.