XPS Sandwich Panel: On‑Site Common Faults FAQ
⚠️
Q1: Why does XPS sandwich panel produce shrinkage and warping after installation?
A: XPS foam core is sensitive to high‑temperature environment. Ordinary‑grade XPS sandwich panel will experience obvious thermal shrinkage when exposed to long‑term continuous high‑temperature radiation. Many projects place XPS sandwich panel close to heat‑generating equipment without isolation measures. Under sustained heat impact, XPS core shrinks, resulting in panel warping, uneven wall surface and widened panel joints. For high‑temperature zones, avoid ordinary XPS sandwich panel directly; select high‑temperature modified XPS sandwich panel or add heat‑shield baffles for isolation protection.
🔥
Q2: What causes interlayer delamination between XPS foam core and metal skins?
A: Delamination of XPS sandwich panel mainly comes from three reasons. First, mismatched adhesive cannot form stable bonding with XPS foam surface. Second, manufacturers reduce pressing time and pressure during composite process to increase output. Third, water vapor invades cut cross‑sections after on‑site cutting. Once moisture permeates the bonding interface, adhesion force will fail. All cut faces of XPS sandwich panel must be fully sealed immediately after cutting. You can test bonding performance through free samples before bulk purchasing XPS sandwich panel.
❄️
Q3: Does XPS sandwich panel performance decay under long‑term low‑temperature cold‑storage conditions?
A: General‑purpose XPS sandwich panel can be used for above‑zero constant‑temperature workshops. Under long‑term ultra‑low‑temperature environment, some XPS formula will gradually become brittle, micro‑cracks appear inside foam core, thermal‑insulation performance declines continuously. For deep‑freeze cold‑storage projects, ordinary XPS sandwich panel is not recommended. Low‑temperature resistant modified XPS sandwich panel shall be specified, and confirm test data matching actual operating temperature of cold warehouse.
📋
Q4: Why XPS sandwich panel often fails fire‑acceptance inspection?
A: Base XPS foam material is combustible. Only XPS core added with qualified flame‑retardant additives can reach limited‑combustible grade. Many suppliers sell ordinary XPS sandwich panel falsely marked as fire‑retardant type. In addition, some traders only provide test reports of bare XPS foam instead of finished XPS sandwich panel test documents. For project tender and acceptance, you must obtain third‑party reports corresponding to finished XPS sandwich panel and verify parameter consistency with delivered goods.
☀️
Q5: Why does XPS sandwich panel degrade rapidly under long‑term ultraviolet exposure?
A: XPS foam core is vulnerable to UV damage. Long‑time sunlight irradiation will cause XPS core aging, brittleness and powdering. If XPS sandwich panel is stored outdoors without shelter, core performance will deteriorate before installation. XPS sandwich panel must be stored in covered indoor warehouse. Protective film on metal surface should not be removed until right before installation.
🏭 As a local source manufacturer located in Foshan, SAMZOON understands the application characteristics and acceptance standards of XPS sandwich panel. We control XPS foam formula, adhesive matching and composite process strictly. Custom‑made XPS sandwich panel, urgent production scheduling and free sample service are available. Our technical team provides project‑selection suggestion and on‑site construction guidance to help engineering customers avoid typical XPS sandwich panel faults and realize smooth project acceptance. A large number of South‑China cold‑storage and industrial project landing cases can be referenced.
When sourcing XPS sandwich panel, do not only compare unit price. Check foam formula, flame‑retardant performance, adhesive compatibility and finished‑product test documents comprehensively. Reasonable model selection and standardized on‑site operation are critical to prevent shrinkage, delamination and acceptance failure of XPS sandwich panel.
