公开(公告)号：US08003031B2

公开(公告)日：2011-08-23

申请号：US12094290

申请日：2006-11-16

Applicant: Amit Kumar Lohia ,  Harendra Kumar Anand

Inventor： Amit Kumar Lohia ,  Harendra Kumar Anand

IPC: B29C55/30

CPC classification number: B29C55/065 ,  B29C47/0021 ,  B29C47/0038 ,  B29C47/0057 ,  B29C47/0066 ,  B29C47/0898 ,  B29C47/8805 ,  B29C47/8815 ,  B29C47/8845 ,  B29C47/8895 ,  B29C2793/0036 ,  B29K2023/0625 ,  B29K2023/065 ,  B29K2023/12 ,  B29K2105/0032 ,  B29K2105/005 ,  B29K2105/256

Abstract: The invention relates to a method for producing oriented slit film tapes, comprising the following steps: extruding melt polymer through a die (2); simultaneous quenching and melt-drawing of the molten polymer in the cooling device to form a film sheet (3); slitting the initial film sheet into a plurality of relatively narrow slit film tapes (4); stretching (8) at elevated temperature, by passing the slit film tapes through a heating medium (7) at a temperature just below the softening temperature of the slit film tapes; y annealing and cooling the oriented slit film tapes (10, 11); winding the slit film tapes (13); characterized in that before the stretching step, it has a stage of pre-stretching (108) made by passing the slit film tapes through one set of heated holding rollers (107) turning at a given speed and one set of cooled pre-stretch rollers (109) turning faster than the heated holding rollers, wherein at least one of the rollers of the set of holding rollers is heated and at least one of the rollers of the set of pre-stretch rollers is cooled. The invention also relates to an apparatus for performing this method and to the products obtained by said method.

Abstract translation: 本发明涉及一种生产定向切片胶带的方法，包括以下步骤：通过模具（2）挤出熔融聚合物; 在冷却装置中同时淬火和熔融熔融聚合物以形成膜片（3）; 将初始薄膜片切割成多个相对窄的狭缝薄膜带（4）; 通过使狭缝膜带通过加热介质（7）在刚好低于切膜带的软化温度的温度下拉伸（8）; y取向和冷却定向的薄膜带（10,11）; 卷绕薄膜带（13）; 其特征在于，在拉伸步骤之前，其具有通过使狭缝膜带通过一组以给定速度转动的一组加热保持辊（107）而制成的预拉伸阶段（108）和一组冷却的预拉伸辊 （109）比所述加热的保持辊更快地转动，其中所述一组保持辊的至少一个辊被加热，并且所述一组预拉伸辊中的至少一个辊被冷却。 本发明还涉及一种用于执行该方法的设备和通过所述方法获得的产品。

公开(公告)号：US20080258333A1

公开(公告)日：2008-10-23

申请号：US12094290

申请日：2006-11-16

Applicant: Amit Kumar Lohia ,  Harendra Kumar Anand

Inventor： Amit Kumar Lohia ,  Harendra Kumar Anand

IPC: B29C55/30

CPC classification number: B29C55/065 ,  B29C47/0021 ,  B29C47/0038 ,  B29C47/0057 ,  B29C47/0066 ,  B29C47/0898 ,  B29C47/8805 ,  B29C47/8815 ,  B29C47/8845 ,  B29C47/8895 ,  B29C2793/0036 ,  B29K2023/0625 ,  B29K2023/065 ,  B29K2023/12 ,  B29K2105/0032 ,  B29K2105/005 ,  B29K2105/256

Abstract: The invention relates to a method for producing oriented slit film tapes, comprising the following steps: extruding melt polymer through a die (2); simultaneous quenching and melt-drawing of the molten polymer in the cooling device to form a film sheet (3); slitting the initial film sheet into a plurality of relatively narrow slit film tapes (4); stretching (8) at elevated temperature, by passing the slit film tapes through a heating medium (7) at a temperature just below the softening temperature of the slit film tapes; y annealing and cooling the oriented slit film tapes (10, 11); winding the slit film tapes (13); characterized in that before the stretching step, it has a stage of pre-stretching (108) made by passing the slit film tapes through one set of heated holding rollers (107) turning at a given speed and one set of cooled pre-stretch rollers (109) turning faster than the heated holding rollers, wherein at least one of the rollers of the set of holding rollers is heated and at least one of the rollers of the set of pre-stretch rollers is cooled. The invention also relates to an apparatus for performing this method and to the products obtained by said method.

Abstract translation: 本发明涉及一种生产定向切片胶带的方法，包括以下步骤：通过模具（2）挤出熔融聚合物; 在冷却装置中同时淬火和熔融熔融聚合物以形成膜片（3）; 将初始薄膜片切割成多个相对窄的狭缝薄膜带（4）; 通过使狭缝膜带通过加热介质（7）在刚好低于切膜带的软化温度的温度下拉伸（8）; y取向和冷却定向的薄膜带（10,11）; 卷绕薄膜带（13）; 其特征在于，在拉伸步骤之前，其具有通过使狭缝膜带通过一组以给定速度转动的一组加热保持辊（107）而制成的预拉伸阶段（108）和一组冷却的预拉伸辊 （109）比所述加热的保持辊更快地转动，其中所述一组保持辊的至少一个辊被加热，并且所述一组预拉伸辊中的至少一个辊被冷却。 本发明还涉及一种用于执行该方法的设备和通过所述方法获得的产品。