PU Sandwich Panel: Price & Foaming‑Process Breakdown

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PU sandwich panel is widely used in cold‑storage warehouses and clean‑room workshops for outstanding thermal‑insulation performance. However, buyers will encounter greatly varied quotations when sourcing PU sandwich panel. Identical‑thickness PU sandwich panel may have very different market prices. Many purchasers only compare surface thickness parameters and ignore internal foaming formula and composite craftsmanship, which leads to receiving low‑quality PU sandwich panel after bulk order. Based on abundant South‑China cold‑storage and purification‑project cases, SAMZOON explains the core factors that cause price differences of PU sandwich panel.

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PU foam core formula is the decisive factor for PU sandwich‑panel cost. High‑quality PU sandwich panel adopts high‑purity polyether raw‑material with stable foaming ratio. The formed PU foam core features uniform cell structure, low water absorption and stable thermal‑conductivity coefficient. Some low‑cost PU sandwich panel uses recycled raw‑materials or reduces high‑cost additives. Such PU sandwich‑panel foam core has uneven bubbles, high water‑absorption rate and poor dimensional stability. After long‑term operation in cold‑storage or humid environment, PU sandwich panel will suffer shrinkage and thermal‑insulation attenuation.

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Core density directly affects mechanical performance and thermal‑insulation effect of PU sandwich panel. Different application scenarios require matched PU foam density. Cold‑storage PU sandwich panel demands higher core density to resist low‑temperature shrinkage stress. Ordinary clean‑room PU sandwich panel can adopt medium‑density formula. Many suppliers mark same thickness for PU sandwich panel but cut core density to lower cost. Purchasers cannot judge core density merely by panel appearance. It is necessary to require suppliers to provide actual density test data for PU sandwich panel.

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Surface metal skins constitute another major cost component of PU sandwich panel. Surface‑sheet material, base‑material thickness and coating type greatly influence overall quotation of PU sandwich panel. For cold‑storage and high‑humidity clean‑room projects, anti‑corrosion coated metal sheets shall be selected. Some low‑priced PU sandwich panel uses thin‑gauge base material and inferior coating. After installation, PU sandwich panel is easy to scratch, corrode and dent, shortening whole service life.

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Composite process and pressing procedure also generate quality gaps for PU sandwich panel. Mature PU sandwich‑panel production needs continuous high‑pressure composite to ensure tight bonding between foam core and metal skins. Small manufacturers may shorten pressing time and reduce composite pressure to boost output. This kind of PU sandwich panel looks normal in finished‑product inspection, yet interlayer delamination risk will gradually appear after delivery. Custom‑made size, special edge‑sealing structure and fire‑retardant modification will further change the final cost of PU sandwich panel.

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As a Foshan‑based original manufacturer, SAMZOON is familiar with acceptance requirements for purification and cold‑storage projects. We control PU foam formula, core density and metal‑skin selection strictly. Custom‑made PU sandwich panel, urgent production scheduling and free sample service are available. Our technical team helps customers sort out reasonable parameter configuration of PU sandwich panel according to project working‑conditions, avoiding losses caused by simply chasing low prices. Numerous South‑China project cases can be supplied for reference.

When comparing quotations of PU sandwich panel, do not focus only on panel thickness. Check foam‑core formula, core density, surface‑sheet parameters and composite‑process standard comprehensively. Reasonable parameter configuration is the foundation to balance cost and long‑term stable performance of PU sandwich panel.