片状模塑料
片状模塑料 (SMC) 用于压塑，通常是较大的部件——需要达到较高的机械强度。玻璃纤维增强材料在 10% 至 60% 之间，玻璃长度稍长于团状模塑料 (BMC)——在 1/2 英寸至 1 英寸 (25mm) 之间。
片状模塑料 (SMC) 是由聚酯树脂、惰性填料、纤维类增强材料、催化剂、颜料和稳定剂、脱模剂及增稠剂等组成的混合物。片状模塑料的生产是一种连续的在线生产工艺。为防止片料间相互粘合在一起，生产中将会在片料的上下两面各覆盖一层塑料薄膜。这种薄膜是聚苯乙烯薄膜或聚苯乙烯/尼龙复合膜。生产时浆料被均匀地涂覆在底层薄膜上，然后短切玻璃纤维均匀撒落在浆料上并随机排布；最后在上面覆以顶层薄膜形成一个预定厚度的夹芯结构。片料在经过 48 小时熟化后可用于模压成型。
片状模塑料能模压成复杂的形状，片状模塑料的机械性能高且外观出众，是汽车 A 级车身覆盖件、高强度电气部件、商业机柜、水上摩托和各种构件的理想选择。
Executive Summary
Sheet Molding Compound (SMC) is used in compression molding, often of larger parts, where higher mechanical strengths are required. Glass reinforcement is between 10% and 60%, and glass length is between 1/2-inch and 1-inch (25mm). Thermoset SMC is a mixture of polymer resin, inert fillers, fiber reinforcement, catalysts, pigments and stabilizers, release agents, and thickeners, and can be molded into complex shapes. High mechanical properties and excellent surface appearance make SMC ideal for automotive Class A body panels, high-strength electrical parts, business equipment cabinets, personal watercraft, and various structural components. |
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