Product Introduction:
Daruwin's EPS Foam Raw Materials are specially made for the fire door core materials. These are not ordinary packaging foam particles but the professional-grade materials with temperature resistance, water repellency, and structural stability features built-in. Fire doors have very stringent requirements for their core materials, which must be lightweight, non-collapsible, crack-resistant, heat-resistant, and non-absorbent. Our EPS particles are developed precisely to address these pain points. EPS Beads Expandable Polystyrene Granules feature a closed-cell rate of ≥ 90%, effectively blocking moisture penetration and thus preventing dampness even in humid and cold environments. Its even foaming structure makes the door core more compact and stable, and therefore less susceptible to collapse. The product has stable temperature resistance and will not be deformed even after long-term temperature changes within a door structure. Besides that, the density may be changed according to different fire door grades, thus combining a lightweight design with the best strength and stability.
Product Applications:
The special EPS raw material for fire door cores finds primary application in the production of different types of steel, wood, and composite fire doors, wherein it acts as a lightweight, heat-insulating core material for the door leaf. As a result of the foaming process, the product is light and stable, non-absorbent, and non-collapsible, thus it is the perfect solution for door structures which have to face long-term temperature differences and heat coming from metal door panels. Thus, both mass-produced engineering doors and tailor-made fire door core panels get a more even, lighter, and temperature-resistant core structure.
Product Advantages:
High closed-cell rate, non-absorbent: The door core remains stable even under humid and cold conditions; it neither expands nor cracks.
Stable temperature resistance: The door core remains soft and undeformed even at 65℃, thus it is fit for long-term use.
Uniform foaming: Dense internal structure; the door core neither collapses nor weakens.
Mechanical Properties
EPS Fire Rated Door Core Foamed's compressive strength reaches S ≥ 6–8 kg/cm², thereby the door core will not easily get deformed or collapsed due to daily use and long-term stress. A bulk density of U ≤ 18 kg/m³ is indicative of the door core being lightweight, thus facilitating handling and installation, while not losing structural stability because of its light weight. In addition, the foaming ratio is from 40 to 70 times, thus providing a uniform and dense internal structure of the door core, which is not very heavy but still good in pressure resistance. The data, in combination, explains whether the door core is "light but not flimsy," thus remaining stable and durable when used for a long time.
Factory Capabilities
The Daruwin plant covers 185 acres and is equipped with a modern production line that has an annual output capacity of 240,000 tons EPS new materials. The raw materials are coming from Fushun Petrochemical area, a source that ensures supply stability, short transportation distances and, thus, consistent products between batches. To keep the factory running smooth and efficient, the company has installed automated tank farms, conveyor lines, finished product warehouses, and weighbridge systems. The entire operation is highly automated, which means long-term, continuous, and stable large-volume supply is a guarantee. The R&D team can provide custom-made production options depending on the door core structures and molding processes, so the materials better fit your equipment and processes, instead of you having to adapt to the materials.
Packaging & Logistics
25kg woven bags + PE liner 500–1000kg ton bags (frequently used for export) Standard pallets, shrink wrap, wooden pallets, customized markings, and barcode management are offered. The factory is situated alongside Shenyang and Fushun and has numerous logistics channels, thus enabling flexible delivery and the rapid distribution of large-scale projects.
FAQ
Q: Can your EPS meet the flame retardant requirements for fire door core materials?
A: Yes, we are able to adjust the formulation according to your door's fire rating.
Q: Will it deform in high-temperature environments?
A: There will be no abnormalities at 65℃, so it is suitable for the temperature resistance requirements of door cores.
Q: Can it be adapted to our existing door core production line?
A: Most of the processes can be used directly.
About Us:
Daruwin factory is known for not only its large production capacity but also its remarkable level of perfectionism in every detail. The outdoor tank farm is completely sealed, and the quality of the raw materials is very stable since no single temperature fluctuation is able to affect it. In this way, little batch-to-batch variation can be seen and the end product is very stable. The finished product warehouse is clean and well-ordered, the inventory consists of a clear chart, and the shipping is done very fast. The weighbridge data is transferred directly to the ERP system, so the unloading can be performed immediately after weighing. Do not hesitate to get in touch with us at any moment.
