公开(公告)号：US20090169668A1

公开(公告)日：2009-07-02

申请号：US12294576

申请日：2007-03-27

Applicant: Kari Kirjavainen ,  Teuvo Arpiainen

Inventor： Kari Kirjavainen ,  Teuvo Arpiainen

IPC: B29C67/00

CPC classification number: B29C55/08 ,  B29C35/045

Abstract: A transverse stretching device comprises two stretching wheels and endless bands arranged against them and revolving around band guide rolls so that a plastic film to be stretched is arranged at its both edges between a stretching wheel and a band. The stretching wheels and the bands are arranged in such a way that in the direction of travel of the plastic film they are further apart from each other at the end than in the beginning, whereby the transverse stretching device stretches the plastic film in the transverse direction. The stretching wheels are rims open in the center and the device includes heating means arranged through the rims at least at some angle between the stretching wheels.

Abstract translation: 横向拉伸装置包括两个拉伸轮和环形带，其布置成抵靠它们并围绕带引导辊旋转，使得待拉伸的塑料膜在其拉伸轮和带之间的两个边缘处布置。 拉伸轮和带被布置成使得在塑料膜的行进方向上它们在开始时比端部彼此更远地分开，由此横向拉伸装置沿横向拉伸塑料膜 。 拉伸轮是在中心开口的边缘，并且该装置包括至少在拉伸轮之间的某个角度处布置成通过边缘的加热装置。

公开(公告)号：US20080224346A1

公开(公告)日：2008-09-18

申请号：US12067361

申请日：2006-06-05

Applicant: Kari Kirjavainen ,  Teuvo Arpiainen ,  Markku Vilkki ,  Hannu Lehtola

Inventor： Kari Kirjavainen ,  Teuvo Arpiainen ,  Markku Vilkki ,  Hannu Lehtola

IPC: B29C47/00 ,  D01D5/12

CPC classification number: B29C55/143 ,  B29C48/08 ,  B29C48/91 ,  B29C48/914 ,  B29C48/9175 ,  B29C48/919 ,  B29C55/005 ,  B29K2105/04 ,  B29K2105/16 ,  C08J5/18

Abstract: A film (5) is extruded from plastic material by means of an extruder. Material is mixed into the plastic (5a) of the plastic film (5) before the extrusion so that cavitation bubbles are formed in the material particles mixed into the plastic (5a) when the plastic film is stretched. The film (5) is orientated by stretching. After the extrusion the plastic film (5) is cooled slowly below the crystallization point of the plastic material before the orientation.

Abstract translation: 薄膜（5）通过挤出机从塑料材料挤出。 在挤出之前将材料混合到塑料膜（5）的塑料（5a）中，使得当塑料膜被拉伸时，在混合到塑料（5a）中的材料颗粒中形成气泡。 膜（5）通过拉伸取向。 在挤出之后，在取向之前，将塑料膜（5）缓慢地冷却到塑料材料的结晶点之下。