Permanent surface modification of polypropylene nonwoven fabrics is achieved through electron beam radiation induced chemical bonding. The electron beam energy levels suitable for such chemical bonding are between about 5 KeV to about 110 KeV at the surface of the fabric facing the electron beam radiation source. At these energy levels, chemical bonding, control of electron beam penetration and the formation of free radicals in the polypropylene nonwoven fabrics are achieved. Control of electron beam penetration produces free radical formation and chemical bonding at selective levels within the fabric as well as bonding of different chemicals asymmetrically to the same fabric with minimal, if any, loss of polymer fabric strength.
聚
丙烯无纺布的永久性表面改性是通过电子束辐射诱导
化学键合实现的。在面对电子束辐射源的织物表面,适合这种
化学键合的电子束能级约为 5 KeV 至 110 KeV。在这些能级下,聚
丙烯无纺布中的
化学键、电子束穿透控制和自由基的形成均可实现。通过控制电子束的穿透力,可在织物内部选择性地形成自由基和
化学键,还可将不同的
化学物质不对称地键合在同一织物上,同时将聚合物织物强度的损失降至最低。