초록 ▼

A nonwoven bulky composite sheet material has first and second vapor permeable layers on opposite sides of a third layer of a bulky, flexible material. The third layer has a thickness in the range of 0.3 to 3.0 mm before being bonded between said first and second layers. The first layer, the second

A nonwoven bulky composite sheet material has first and second vapor permeable layers on opposite sides of a third layer of a bulky, flexible material. The third layer has a thickness in the range of 0.3 to 3.0 mm before being bonded between said first and second layers. The first layer, the second layer and the third layer are bonded together to form a flexible composite sheet with a thickness of at least 0.3 3 mm and a moisture vapor transmission of at least 100 g/m.sup.2 in 24 hours.

대표청구항 ▼

[ We claim:] [1.] A packing cover for packed items comprising:first and second layers of a synthetic sheet having a thickness less than 1 mm, a basis weight less than 125 g/m.sup.2, and a water vapor transmission rate of at least 100 g/m.sup.2 in 24 hours according to A[ standard E96, method B;]a th

[ We claim:] [1.] A packing cover for packed items comprising:first and second layers of a synthetic sheet having a thickness less than 1 mm, a basis weight less than 125 g/m.sup.2, and a water vapor transmission rate of at least 100 g/m.sup.2 in 24 hours according to A[ standard E96, method B;]a third layer of a bulky, flexible material between said first and second layers, said third layer having a thickness in the range of 0.3 to 3.0 mm before being bonded between said first and second layers;said first layer, said second layer and said third layer being bonded together to form a flexible composite sheet, having a thickness of at least 0.3 mm and a moisture vapor transmission rate of at least 100 g/m.sup.2 in 24 hours according to A[ standard E96, method B, said composite sheet having an edge with elastic sewn into portions of the edge to hold the sheet on a packed item.][ D 1682, Section 19.]