Focused on the field of high-temperature-resistant polyimide (PI) composite materials.
Energy-saving retrofit of pulp-molding drying equipment drives demand for high-temperature-resistant insulation materials.
Mar 27,2026
Energy-saving retrofitting of pulp-molding drying equipment is a key strategic direction for reducing costs and improving efficiency in the industry. In the drying stage, conventional equipment suffers from persistently high energy consumption due to unidirectional energy dissipation; for example, open-system designs directly vent high-temperature exhaust gases containing substantial water vapor, resulting in complete waste of the latent heat. To address this issue, closed-loop exhaust-gas condensation and dehumidification systems recover the latent heat of water vapor in the exhaust, reducing its temperature from 80–120°C to below 40°C and enabling cascaded utilization of thermal energy, thereby achieving energy savings of more than 40% compared with traditional open systems. Meanwhile, heat-pump drying technology uses a reverse Carnot cycle to upgrade and utilize low-temperature heat, delivering an energy efficiency ratio of 3.0–5.0; one enterprise, after adopting this technology, reduced its drying energy consumption from 1.2 kWh/kg to 0.35 kWh/kg.
The demand for high-temperature insulation materials is being driven in tandem with energy-saving upgrades. In high-temperature, dry environments ranging from 200°C to 400°C, conventional insulation materials often suffer from inadequate thermal resistance, leading to heat loss that not only increases energy consumption but also shortens equipment lifespan. In contrast, novel polyimide-based insulation materials, with their superior resistance to high temperatures, moisture, and cracking, can effectively lower the temperature of mold cold surfaces and minimize heat loss. For instance, one company that adopted specialized insulation materials experienced a significant reduction in energy consumption, extended mold service life, and improved product molding accuracy. The widespread adoption of such materials is accelerating the pulp-molding industry’s transition toward greater efficiency and lower carbon emissions.
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