| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a cardboard structure having gas barrier characteristics, costwise advantageous and reduced in the number of pinholes. <P>SOLUTION: The layers 10 and 14 adapted to cardboard 12 comprise polyolefin and the layer 22 coming into contact with a product also comprises the polyolefin. The polyolefin may be a low density polyolefin, a straight chain low density polyolefin, a metallocene catalyzed straight chain low density polyolefin or a mixture of the low density polyethylene and the straight chain low density polyolefin or the metallocene catalyzed straight chain low density polyolefin. One of the polyolefin layers has a weight of 18-26 g/m<SP>2</SP>, the other has a weight of 12-16 g/m<SP>2</SP>if it is the contact layer with the product and the contact layer of the cardboard has a weight of 5-10 g/m<SP>2</SP>. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
