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    • 1. 发明授权
    • Surface protective films
    • 表面保护膜
    • US5567515A
    • 1996-10-22
    • US365540
    • 1994-12-28
    • Hitoshi KogaMasao KameyamaKazuo IwataMasahiro Gonda
    • Hitoshi KogaMasao KameyamaKazuo IwataMasahiro Gonda
    • C09J7/02B32B7/12B32B27/08
    • C09J7/021C09J2203/306Y10T428/2848Y10T428/2852Y10T428/2883Y10T428/31913
    • The underside of a base layer consisting of one or more sub-layers is overlaid with an adhesive layer that is chiefly composed of an .alpha.-olefin copolymer that is based on at least two .alpha.-olefins selected from among .alpha.-olefins having 2-12 carbon atoms and which has a crystallinity of up to 10%, and said adhesive layer will develop an initial tack of at least 20 g/25 mm when attached to the surface of a stainless steel plate at 23.degree. C. The thus produced surface protective film, when attached to various kinds of adherends, will not experience separation of the adhesive layer from the base layer while developing strong initial tack, will experience only small changes in adhesive strength (peel strength) with the lapse of time after attachment to the adherends, is sufficiently low in blocking force to provide ease in film handling during the rewinding operation and it yet can be manufactured at low cost.
    • 由一个或多个亚层组成的基层的下侧覆盖有主要由α-烯烃共聚物组成的粘合剂层,所述α-烯烃共聚物基于选自具有2-12个碳原子的α-烯烃中的至少两种α-烯烃 碳原子,其结晶度高达10%,并且当粘附在23℃的不锈钢板的表面上时,所述粘合剂层将产生至少20g / 25mm的初始粘性。由此产生的表面保护 胶片当附着于各种被粘物时,不会发生粘合剂层与基底层的分离,同时显现出强烈的初始粘着力,在附着到被粘附体之后随着时间的推移经历粘合强度(剥离强度)的微小变化 ,阻塞力足够低,以便在重绕操作期间容易地进行膜处理,并且可以以低成本制造。