公开(公告)号：US20090217498A1

公开(公告)日：2009-09-03

申请号：US12399311

申请日：2009-03-06

申请人： Cathia DOS SANTOS ,  Michel COLOTTE ,  Jean-Louis DUPONT ,  Francois LOUIS

发明人： Cathia DOS SANTOS ,  Michel COLOTTE ,  Jean-Louis DUPONT ,  Francois LOUIS

IPC分类号： D04H1/46 ,  D04H1/70 ,  D01G25/00 ,  D04H3/02

CPC分类号： D04H1/74 ,  D01G23/06 ,  D01G25/00 ,  D04H1/46 ,  D04H1/482 ,  D04H1/498

摘要： A crosslapper receives a card web and folds it into a lap intended to be needle-punched or consolidated by other means. The web comprises zones which are more condensed, having a spectrum of orientation of fibres with a component parallel to the width of the web, alternating with less condensed zones having a longitudinal unidirectional spectrum of orientations. The zones which are less condensed are used to form the edge zones of the lap. The result is that the lap has different respective spectra of orientation which pre-compensate for the unwanted changes produced by the needle-punching or other consolidation which follows. A needle-punched lap is obtained having a uniform MD/CD ratio (relationship between longitudinal and respectively transverse tensile strengths) or having a sought profile of the MD/CD ratio across the width of the lap.

摘要翻译： 交叉接头接收卡片网，并将其折叠成用于通过其他方式针刺或固结的搭接。 幅材包括更冷凝的区域，其具有纤维取向的频谱，其中组分平行于幅材的宽度，与具有纵向单向取向谱的较少的冷凝区交替。 较少冷凝的区域用于形成搭接的边缘区域。 结果是，搭接架具有不同的取向光谱，该方向预先补偿由下列针刺或其他固结产生的不期望的变化。 获得具有均匀的MD / CD比（纵向和横向拉伸强度之间的关系）或具有跨越膝部宽度的MD / CD比的寻找曲线的针刺的搭接。