Expanded Polystyrene Foam
Overview
Expanded Polystyrene (EPS) foam is a versatile thermoplastic material produced by expanding polystyrene beads with steam, creating a closed-cell structure that is 98% air. Developed in the 1950s, EPS revolutionized packaging and insulation industries due to its unique combination of lightness, rigidity, and thermal efficiency. Unlike extruded polystyrene (XPS), EPS is manufactured without blowing agents that harm the ozone layer, making it more environmentally friendly among foam plastics. Its cellular structure provides exceptional energy absorption, explaining its widespread use in protective packaging for electronics and fragile goods.
Physical and Chemical Properties
EPS foam exhibits a low thermal conductivity of 0.032-0.038 W/(m·K), outperforming many traditional insulation materials. Its compressive strength ranges from 50-300 kPa, depending on density, while remaining lightweight (typically 1-2% of the weight of equivalent wood or concrete volumes). Chemically, EPS is inert to most aqueous solutions, acids, and alkalis but dissolves in aromatic hydrocarbons and chlorinated solvents. It has negligible water absorption (<1% by volume after 24h immersion) due to its closed-cell structure. UV exposure causes surface yellowing and brittleness, requiring protective coatings for outdoor applications.
Main Applications
In packaging, EPS protects goods from shock and vibration, accounting for approximately 40% of global EPS consumption. Custom-molded inserts secure medical devices, electronics, and automotive components during transit. The construction sector uses EPS for insulated concrete forms (ICFs), roof insulation, and structural insulated panels (SIPs). Food service applications include disposable coolers, coffee cups, and seafood boxes, though environmental concerns are driving alternatives in this sector. Niche uses include floating docks, road embankment stabilization (geofoam), and theatrical set construction due to its easy machinability.
Safety and Storage
EPS poses minimal health risks during normal handling but requires precautions. Dust from cutting may irritate respiratory systems—ventilation or particle masks are recommended during machining. Though non-toxic, EPS should not be used for food contact above 80°C to prevent potential styrene migration. Storage areas must be well-ventilated and separated from solvents, heat sources, and open flames. Bulk EPS is highly flammable (auto-ignition at 490°C) and burns rapidly, releasing dense smoke containing carbon monoxide and styrene monomers. Flame-retardant grades containing hexabromocyclododecane (HBCD) are available but face increasing regulatory restrictions.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO 9001 certification for consistent quality. Key specifications include: density (e.g., 15kg/m³ for packaging, 30kg/m³ for construction), block/molded part dimensions, and compliance with regional fire standards (e.g., ASTM E84 Class 1 in US). For large projects, request samples to verify dimensional stability and compressive strength. Just-in-time delivery is preferable due to EPS's bulky storage requirements. Environmentally conscious buyers may seek EPS with recycled content (up to 30% post-industrial waste) or inquire about take-back programs for used material. Price negotiations should factor in seasonal demand peaks in construction periods.
Related Manufacturers
- 主营：真空包装袋、珍珠棉袋、珍珠棉内托、聚苯乙烯保丽龙、气泡膜、四方袋、缠绕膜、收缩膜、密封袋、EVA泡棉、家具海绵、保护膜、静电膜、PE平口袋、快递袋、eva护角、铝箔袋、防静电袋、珠光膜气泡袋、CPE胶袋、胶带、珍珠棉复气泡膜、珍珠棉复铝箔、钢筋保护套、海绵片
- 主营：接缝条、填缝板、接缝板、泡沫条、泡沫棒、泡沫板、塑料板、塑料条、异型件、发泡棒、膨胀胶、嵌缝板、挡风条、珍珠棉、填缝胶、密封膏、圆柱管、密封胶、灌封膏、塑料棒、灌封胶、止浆条、止浆棒、修复剂、闭孔板
- 主营：热收缩膜、收缩膜、热缩膜、泡沫、热缩袋、pof收缩膜、交联膜、pvc收缩膜、bopp薄膜、热封膜、气泡膜、密封袋、自封袋、珍珠棉、泡棉、opp胶袋、纸护角、纸包角、包装袋、包装膜、泡泡袋、快递袋、印刷膜、pe膜
- 主营：挤塑板、保温板、石墨模塑、泡沫板、防火防潮、石墨聚苯板、保温隔声板、石墨烯聚苯板
- 主营：护角条、中空板、分格袋、泡沫条、泡沫板、编织布、复合膜、内衬袋、气泡纸、保温板、收缩膜、拉链袋、塑料袋、编织袋、气泡袋、牛皮纸、内膜袋、立体袋、包装箱、包装膜、圆柱条、保护膜、充气袋、屏蔽袋、打包膜
- 主营：珍珠棉、eva胶条、合旺包装、泡沫护角、泡沫包角、酒瓶泡沫箱、防静电气泡袋
- 主营：泡棉条、密封胶、塑料棒、泡沫条、泡沫棒、泡沫板、桥梁泡沫止浆棒、闭孔泡沫填缝条、密封膏、塑料板、聚乙烯棒、填缝材料、玻璃垫棒、聚硫灌封胶、膨胀止水胶、聚氨酯弹性胶、非下垂灌封胶、聚乙烯发泡板、自流平灌封胶、高压聚乙烯板、防水聚氨酯胶、高弹性防水胶、聚氨酯防水胶、聚氨酯结构胶、聚乙烯闭孔泡条
- 主营：EVA泡棉、pe四方袋、opp袋、EPP泡沫板、印刷塑料袋、热收缩袋、铝箔袋、真空袋、气柱袋、充气袋、气泡袋、自封袋
- 主营：保丽龙、塑料包装、泡棉
- 主营：珍珠棉、护角家具、白色减震、泡沫包装、泡沫颗粒、泡沫板防震、白色泡沫板、包装缓冲
- 主营：eva泡棉、eva内衬、防静电eva泡棉、EPP泡沫板、聚丙烯泡沫板、阻燃eva泡棉、彩色eva泡棉、珍珠棉内托、珍珠棉内衬
- 主营：EPE珍珠棉、珍珠棉包装、PE平口袋、EPS泡沫、保利龙泡沫、包装袋、EVA泡棉、EVA包装产品、珍珠棉材料、塑料袋、纸护角、XPS挤塑板、珍珠棉护角
- 主营：eps泡沫定制、Epe珍珠棉
- 主营：cpe磨砂袋、珍珠棉、EVA泡棉、eps泡沫板、epp泡沫板、定制epp泡沫板、泡沫大板、泡沫片材、pe胶袋、真空包装袋、生物降解胶袋、pof热收缩膜、pvc热缩袋、气泡袋、epp板材、聚丙烯发泡板、阻燃epp板材、收缩膜、收缩袋、EPE珍珠棉管、L型纸护角、pvc标签膜、PE四方袋、发泡板、收缩膜定制
- 主营：石英砂、火山岩、竹炭、eps泡沫颗粒、松树皮、陶粒、铸造石用英砂、斜管填料、火山石、沸石、活性炭、聚丙烯酰胺、聚合氯化铝、葡萄糖、悬浮球、空心球、彗星填料、硫酸铁、水处理石英砂、喷砂除锈、河道治理、尾水处理、污水处理厂、园林景观、流化床填料