公开(公告)号：US20010013538A1

公开(公告)日：2001-08-16

申请号：US09838443

申请日：2001-04-19

Applicant: Sonoco Development, Inc.

Inventor： Mike Drummond ,  Alan Williams ,  Ray Adams

IPC: B65D003/22 ,  B65D003/28

CPC classification number: B29C53/60 ,  B29C53/607 ,  B29C2053/8025 ,  B31C3/00 ,  B65D3/22

Abstract: A tubular composite container includes a paperboard body ply wrapped into a tubular shape, and a polymer film liner ply wrapped into a tubular shape and adhered to the inner surface of the body ply. The liner ply has a circumferential length when unwrapped and flat that is less than that of the body ply so that the liner ply is substantially uncompressed circumferentially. A strip of polymer film liner material is wrapped onto a mandrel and overlapping edge portions of the liner strip are heat sealed together by first preheating the liner strip to a temperature below the sealing temperature of the heat seal material on the edge portions of the liner strip, and then further heating the overlap region of the liner strip to at least the sealing temperature to cause heat sealing of the edge portions. A paperboard strip is coated on an inner surface with adhesive and is then wrapped about the liner and adhered thereto. The outer surface of the liner strip is surface treated by corona discharge or flame treatment prior to being wrapped on the mandrel to improve adhesion to the paperboard, and the liner strip tension is maintained less than about 1 pound per inch of width to prevent liner stretching as the liner strip is advanced to and wrapped about the mandrel. The preheating of the liner strip is performed by a heated section of the mandrel over which the liner strip passes. The overlap region is locally heated by an infrared heater.

Abstract translation: 管状复合容器包括被包裹成管状的纸板本体层和被包裹成管状的聚合物膜衬垫层，并且粘合到主体帘布层的内表面。 衬垫层在展开时具有周向长度，并且平坦且小于身体帘布层的周长，使得衬垫层基本上未被压缩在周向上。 将聚合物薄膜衬里材料条包裹在心轴上，并且衬垫条的重叠边缘部分通过首先将衬垫条预热到温度低于衬垫条的边缘部分处的热密封材料的密封温度的温度而被热封在一起 ，然后进一步将衬垫条的重叠区域加热到至少密封温度，从而引起边缘部分的热封。 纸板条带用粘合剂涂覆在内表面上，然后缠绕在衬垫上并粘附在其上。 衬垫条的外表面在被缠绕在心轴上之前通过电晕放电或火焰处理进行表面处理，以提高与纸板的粘附性，并且衬垫条张力保持在每英寸宽度小于约1磅以防止衬里拉伸 因为衬垫条被推进并围绕心轴缠绕。 衬垫条的预热由衬套条穿过的心轴的加热部分进行。 重叠区域由红外加热器局部加热。