Overview
Silicone sponge sheets are elastomeric foam materials manufactured through a peroxide or platinum-cure process, creating a durable, open- or closed-cell structure. Unlike solid silicone rubber, their porous design provides unique cushioning and compression recovery properties. These sheets are favored in industries requiring materials that maintain flexibility across extreme temperatures while resisting environmental degradation. First developed in the mid-20th century, modern variants incorporate additives for enhanced flame retardancy (meeting UL94 HB/V0) or electrical conductivity. They are available in densities ranging from low (for lightweight sealing) to high (for structural support), with thicknesses typically between 1mm and 50mm.
Physical and Chemical Properties
The material's cellular structure grants it a low thermal conductivity (0.1–0.2 W/m·K), making it effective for insulation. Its compression set (typically <10% after 22h at 150°C) outperforms many organic foams. Silicone sponge sheets exhibit minimal outgassing, critical for vacuum or aerospace applications. Chemically, they resist oils, acids, and alkalis but may swell in ketones or aromatic solvents. UV stability allows outdoor use without significant degradation. The sheets can be fabricated with adhesive backings (e.g., PSA) for easy installation or laminated with other materials for composite functionality.
Main Applications
In electronics, these sheets serve as EMI shielding gaskets or thermal interface materials for heat dissipation. Automotive uses include battery padding in EVs (for vibration absorption) and exhaust system seals. Their FDA-compliant grades appear in food processing equipment as hygienic seals. The aerospace sector utilizes flame-retardant variants for aircraft interior padding and wire insulation. Medical applications include cushioning in prosthetics or surgical tables, where sterility and biocompatibility are paramount. Custom die-cut parts are common for precision sealing solutions.
Safety and Storage
While cured silicone sponge is generally safe, dust generated during cutting requires ventilation or respirators per OSHA guidelines. Storage life exceeds 5 years if kept away from sharp objects that may puncture the foam. Avoid co-storage with PVC, as plasticizer migration can occur. Disposal should follow local regulations for synthetic rubber waste. Recycling options are limited but some manufacturers accept scrap for reprocessing. High-temperature grades may require MSDS review for specific decomposition products (>300°C).
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO 9001 certification and batch traceability. Key specifications to confirm include: compression deflection (e.g., 25% for sealing applications), tensile strength (typically 0.5–1.2 MPa), and color stability if exposed to UV. For large orders, request material certification (RoHS, REACH, or MIL-SPEC) and samples for on-site testing. Lead times vary from 2 weeks (standard grades) to 8 weeks (custom formulations). Consider regional warehouses to reduce logistics costs for bulky shipments.
Related Manufacturers
- 主营：堵水圈、发泡条、橡胶框、硅胶管、海绵垫、氟橡胶、密封件、矽胶管、硅橡胶、橡胶垫、装饰条、骨架条、带胶eva、聚氨酯、封水条、橡胶管、阻水条、tpe胶条、透明条、密封圈、pvc树脂、绝缘垫、硅橡管、机柜门、压边条
- 主营：开孔发泡棉、cr带胶密封块、单面胶密封条、发泡缓冲垫片、自粘泡棉胶条、真空吸盘泡棉、各种密实橡胶制品
- 主营：耐高温胶带、胶帽、胶塞、硅胶塞、硅胶套、绿硅胶、真空吸盘、螺纹塞、高温胶塞、堵孔塞、高温堵头、高温胶套、高温保护套、螺栓保护套、高温螺纹塞、绿色高温胶带、PET高温胶带、铜箔胶带、铝箔胶带、铜箔胶贴、铝箔胶贴、防烤贴纸、防烤胶带
- 主营：发泡剂、橡胶发泡剂、EVA发泡剂、硅胶发泡剂、PVC发泡剂、人造革发泡剂
- 主营：EVA内衬、XPE泡棉内衬、EVA泡棉、EVA垫片、青稞纸垫片、快巴纸垫片、铁氟龙垫片、硅胶垫、软PVC垫片、硅胶泡棉、毛毡垫片、绒布垫片、CR泡棉垫片、亚克力双面胶、IXPE内衬、EVA泡棉双面胶、PE泡棉、隔音棉、吸音棉
- 主营：装饰条、集装箱、密封条、硅胶条、隔音条、密封胶条、包边防撞条
- 主营：BELLMATIC、精和产业喷枪、大洋制器卸扣、YAMARI热电偶、东京计装流量计、昭和机械、八重崎空压机、HAYASHI泵、日铁溶接工业、清和光学镜头、甲南电机电磁阀、三菱电机、东芝产业机器、住友重机械工业、宣真工业绝缘梯、仲精机制作所、综合计装、KETT白度计、HORIUCHI油封、东芝空压机、仓敷化工、安藤计器、堀场、壶三、气动葫芦
- 主营：自粘硅胶垫片、珍珠棉、eva泡棉
- 主营：绝缘硅胶片、导热硅胶垫、导电硅胶垫、阻燃硅胶片
- 主营：O型圈、橡胶垫、异形件定做、油封、密封条、圆顶阀密封圈、板式换热器密封垫、缓冲垫
- 主营：硅胶绵、洗衣袋、打磨布、服装整烫垫料
- 主营：电缆电线、自动剥线机、电脑剥线机、硅胶管、四根剥线机、电线剥皮机、线路板分板机、保温管切管机
- 主营：腰带按摩器、提臀按摩器、手臂强化带、理疗电极片、健身辅助训练、足底按摩脚垫、小护士按摩器、带显示屏腹肌贴
- 主营：pe保护膜、牛皮纸胶带、NOMEX绝缘纸、pet垫片、eva垫片、绝缘片、橡胶垫片、发泡海绵、高导热石墨片、FORMEX绝缘片、pc 、pp、pet、pvc绝缘片、DMD绝缘纸、快巴纸、青稞纸
- 主营：橡胶板、橡胶密封条、橡胶件、硅胶板、硅胶布、硅胶垫、硅胶条、硅胶密封条、硅胶发泡板、硅胶发泡条、硅胶密封件、硅胶制品、橡胶制品