公开(公告)号：WO1996000747A1

公开(公告)日：1996-01-11

申请号：PCT/US1995007097

申请日：1995-06-05

Applicant: NATIONAL STARCH AND CHEMICAL INVESTMENT HOLDING CORPORATION

Inventor： NATIONAL STARCH AND CHEMICAL INVESTMENT HOLDING CORPORATION ,  PULETTI, Paul ,  HATFIELD, Stephen

IPC: C08J03/12

CPC classification number: B01J2/30 ,  B01J2/003 ,  C08J3/124

Abstract: Hot melt adhesive masses are provided with a tackless surface by a process which comprises the steps of: a) extruding the hot melt adhesive through an appropriate die orifice; b) spraying the surface of the extruded adhesive with a molten film forming low molecular weight polymer or formulated polymeric material, the material being selected so that it will not appreciably detract from the properties of the adhesive composition when remelted therewith; c) heating the surface of the coated adhesive at a temperature and for a period of time sufficient to remelt the film forming polymer so as to form a continuous coating thereof yet insufficient to appreciably melt the adhesive; and d) cooling the thus coated adhesive mass to a temperature suitable for handling.

Abstract translation: 通过包括以下步骤的方法，将热熔粘合剂块设置成无粘性表面：a）将热熔粘合剂挤出通过适当的模口; b）用形成低分子量聚合物或配制的聚合物材料的熔融膜喷涂挤出的粘合剂的表面，该材料被选择成使得当与其重熔时不会明显地降低粘合剂组合物的性能; c）在足以使成膜聚合物重熔的温度和时间段下加热涂覆的粘合剂的表面，以形成连续的涂层，但不足以明显地熔化粘合剂; 和d）将如此涂覆的粘合剂物料冷却至适于处理的温度。