Overview
Epoxy resin casting is a thermosetting polymer process where liquid epoxy is poured into molds or over objects, then cured to form rigid, chemically resistant solids. This technique combines epoxy resins with hardeners, initiating a cross-linking reaction that transforms the mixture into a durable material. Widely adopted since the mid-20th century, it balances mechanical performance with design flexibility. Industrial applications prioritize formulations with specific cure times and thermal stability, while artistic uses often emphasize clarity and UV resistance. The process accommodates additives like pigments, fillers, or reinforcing fibers to modify properties such as conductivity or impact strength.
Physical and Chemical Properties
Cured epoxy casting exhibits tensile strength of 50–90 MPa and compressive strength exceeding 100 MPa, outperforming many plastics. Its thermal stability typically ranges from 80°C to 200°C, with specialized high-temp formulations exceeding 300°C. The material's dielectric strength (15–25 kV/mm) makes it ideal for electrical insulation. Chemical resistance varies by formulation but generally includes withstand against acids, alkalis, and solvents. Hydrolysis resistance depends on the curing agent—amine-cured epoxies show superior moisture resistance compared to anhydride-cured versions. Post-curing processes can enhance these properties by 15–30% through complete cross-link formation.
Main Applications
In electronics, epoxy casting encapsulates transformers and circuit boards, providing moisture protection and vibration damping. The aerospace sector uses it for lightweight composite tooling, while marine applications exploit its saltwater resistance for sonar equipment housings. Industrial art utilizes clear casting for museum displays and decorative objects, often with embedded items. Recent innovations include optically transparent grades for LED encapsulation and thermally conductive formulations for power electronics cooling. Medical device manufacturers employ biocompatible grades for imaging equipment components.
Safety and Storage
Uncured epoxy components require strict handling: use nitrile gloves (not latex) and chemical goggles to prevent skin/eye contact. Ventilation must maintain airborne concentrations below 50 ppm (ACGIH TLV). Store resin and hardener separately in original containers at 15–25°C, with moisture-proof seals. Cured material disposal follows local polymer waste regulations—some formulations allow thermal recycling. Spills should be contained with absorbent materials like vermiculite before curing; never rinse with water. Always review SDS for specific first-aid measures related to the formulation used.
B2B Procurement Guide
Industrial buyers should specify: viscosity (200–1,500 cP for casting), pot life (30 min–4 hr typical), and glass transition temperature (Tg ≥ operating temp + 20°C). For large-volume orders, verify batch consistency through ASTM D445 (viscosity) and D638 (tensile) testing reports. Consider total system cost: fast-cure formulations may reduce labor but require precise metering equipment. Evaluate suppliers' technical support for troubleshooting cure defects. For specialized applications, request custom formulations with flexibilizers or flame retardants (e.g., UL94 V-0 rated).
Related Manufacturers
- 主营：石墨粉、氢氧化钙、石英砂、环氧树脂、环氧树脂固化剂、石英粉、硅微粉、硅酸钾、玻璃纤维布、水玻璃、辉绿岩铸石粉、活性炭、消石灰、耐高温耐磨材料、钾水玻璃、耐高温涂料、玻纤布、泡花碱、辉绿岩粉、耐酸水泥、玻璃丝布
- 主营：氯化亚铁、对甲苯磺酸、十溴二苯乙烷、地坪防腐环氧树脂、硼酸锌、促进剂DMP-30、叔丁基过氧化氢TBH、木材防腐剂ACQ、癸二酸二辛酯DOS、磷酸三乙酯TEP、硫酸锆、有机锡T12、三羟甲基丙烷、K54促进剂、N-甲基吡咯烷酮、雕白粉、衣康酸、酚醛树脂2402、氢氧化铝、溴酸钠、吊白块
- 主营：破碎机背衬胶、变压器铁芯漆、胶粘石胶水、环氧树脂灌封胶、环氧树脂防水防腐涂料、环氧树脂灌浆料、环氧砂浆、道钉锚固剂、养鱼池防水漆
- 主营：环氧地坪漆、环氧自流平漆、防静电地坪、混凝土密封固化剂
- 主营：水溶性树脂、水性丙稀酸树脂、水性聚氨酯树脂、水性改性环氧固化剂、水性木器漆助剂、水性羟基丙烯酸乳液、丙烯酸、水性树脂、水性聚氨酯、聚氨酯、水溶性硅丙树脂、水性固化剂、醇溶性丙烯酸树脂、多重交联剂
- 主营：呋喃树脂、t31固化剂、酚醛树脂、环氧树脂、环氧沥青防腐漆、乙烯基树脂、防腐玻璃钢
- 主营：环氧树脂
- 主营：阻燃剂、醛树脂、胶黏剂、环氧树脂、共聚物、黄色粉、聚合物、哑光粉、填缝剂、乳胶漆、纤维素、防锈剂、白碳黑、化妆品、木器漆、沉淀法、乳胶粉、催化剂、杀真剂、固化剂、弹性体、扩散粉、eva树脂、聚丙烯、消泡剂、消光粉
- 主营：环氧树脂增韧剂、增韧改性剂、核壳橡胶增韧剂
- 主营：管型母线、封闭母线、绝缘母线、浇筑型母线槽、耐火母线、全绝缘铜排、母线槽定制、封闭式母线、低压母线槽、防水母线槽、封闭型母线槽、铝合金母线槽、插接式母线槽、密集型母线槽、2000a系列母线槽、高压共箱母线槽
- 主营：[]
- 主营：树脂e44、南亚128、828树脂、环氧树脂、环氧固化剂、环氧地坪漆、丹宝e44、石化e44、树脂e-44、树脂e-51、凤凰树脂E-44、南亚树脂128、巴陵树脂E-44、巴陵树脂128、地坪漆、树脂ab胶
- 主营：松香、萜烯树脂、石油树脂、环氧树脂、丙烯酸树脂、酚醛树脂、马林酸树脂、达玛树脂、附着力促进剂、二氧化硅、丁苯橡胶、水性氯丁胶乳、水性丁苯胶、水性增粘乳液、水性聚氨酯、增稠剂、消泡剂、抗氧剂、水晶滴胶、AB胶、白乳胶、水性黄胶、天然乳胶、美缝剂、色浆色精
- 主营：s15非晶、s11铝质、s13配电、全铜芯、变压器、三相电、s11-50kva、s11全铜、定制s13、s13三相、开关柜、s11电力、硫化机、s11隔离、控制柜、s13油浸、边点线、载调压、切割机、s11三相、35kv电力、s11-800kva、35kv油浸、s11-200kva、s11-300kva
- 主营：环氧树脂