| 摘要 |
An open mesh material includes filaments (1, 2, 3, 4, 11, 12, 15, 16) that intersect one another. At least some of the filaments are composite filaments having a carrier portion of a relatively high melting point and a bonding portion of a relatively low melting point, the bonding portion of each composite filament being thermally bonded to other filaments at points of intersection. The material may be a non-woven fabric that contains at least two layers of weft filaments (1, 2, 11, 12) that may be bordered on one or both sides by a layer of warp filaments (3,4, 15, 16). When compared to other open mesh materials, the open mesh material disclosed herein has a superior combination of some or all of high strength, light weight, high dimensional stability, and openness. Also disclosed herein are articles can be made at least in part from the material including L-seam bags (20), form fill and seal (FFS) bags (1020), and multi-substrate bags (2,020). Methods of making those bags also are disclosed. |
| 主权项 |
1. An open mesh material extending in machine and cross machine directions, the open mesh material comprising: filaments that intersect one another, at least some of the filaments being composite filaments having a carrier portion of a relatively high melting point and a bonding portion of a relatively low inching point, the bonding portion of each composite filament being thermally bonded to other filaments at at least some points of intersection, wherein the open mesh material has a mass per unit area of less than 30 g/m2 and a strength to mass ratio in at least one of the machine and cross machine directions of at least 2.67 N/(g/m2), where strength is measured in accordance with ASTM standard D 5034, wherein
the open mesh material is a non-woven fabric, wherein the filaments include first and second layers of weft filaments that cross one another at an acute angle relative to the cross machine direction, wherein the filaments include third and fourth layers of warp filaments that extend in the machine direction and that are disposed outside of the first layer and the second layer, respectively, wherein the filaments of each of the third and fourth layers extend at least generally in parallel with one mother in the machine direction, and wherein filaments of at least one of the third and fourth layers are spaced closer together in one section of the fabric than in another section of the fabric. |
