TH22656A - Non-woven fiber sheet / Film that is mechanically adapted - Google Patents

Abstract

As disclosed herein, a layered nonwoven fabric/film, combined with a film layer oriented in the lowest measured machine, forms a nonwoven backing layer. Each layer is designed so that the film layer in its layered state has a lengthening at break in the machine cross-direction greater than the maximum load-carrying lengthening for the nonwoven layer in the same direction. Consequently, if the layered sheet is subjected to high tensile forces in the machine cross-direction, the nonwoven layer will be damaged before the film layer. Furthermore, the layered sheet has a minimum maximum load-carrying capacity of 300 g. As a result, the layered sheet is used in specific applications, for example, as an outer covering for hygienic absorbent materials.

Claims (9)

1. The non-woven fiber sheet / film consists of A film layer and a non-woven fiber layer that forms a layer onto one another for Formed into a non-woven fiber layer / film The film layers are mechanically aligned. And alignment of the machine's transverse direction The non-woven fiber layer has machine-oriented and machine-horizontal orientations. And such layered plates have machine-aligned and machine-aligned. The film is aligned in machine orientation before Is layered with such non-woven layers The film has an effective thickness of about 13 micrometers or less. The aforementioned film layer after making a layered sheet And was placed in an arrangement The machine direction is determined as the lengthening at the fracture value of the film in the arrangement. Machine transverse direction The aforementioned non-woven fiber layer is defined as the lengthening at the maximum load. Of non-woven fibers in machine transverse alignment And the layered sheet is the lengthening Up at the value that can bear the maximum load in the machine horizontal orientation. The lengthening value at break of the film in the machine transverse direction is greater than the lengthening value that can The maximum load of the non-woven fiber is obtained in the direction across the said machine. The film layer is defined as the maximum load of the film in the transverse direction. Machine line The above non-woven layer is defined as the maximum load of non-woven fibers in the transverse direction. Machine line Such a layered sheet is defined as the maximum load of the layered plate in the direction. The maximum load of non-woven fibers in the machine transverse direction is greater. The maximum load of the film in the machine transverse direction And the maximum load of the film In the transverse direction of the machine, it is less than the maximum load of the layer plate in the transverse direction. The machine. The maximum load factor of such a layer in the machine direction Such value is at least 300 grams. 2. Non-woven fiber sheet / Film in Clause 1 where the non-woven fiber layer It consists of a non-woven membrane that binds the spinning fibers. 3. Non-woven fiber sheet / Film in Clause 1 where the non-woven fiber layer It consists of a non-woven membrane that binds the spinning fibers. And a layer of non-woven membrane that is blown while liquid 4. Non-woven fiber layer sheet / film according to claim 3, which is the layer of non-woven fiber sheet that Blown while the liquid is attached to the film layer. 5. Non-woven fiber sheet / film in Clause 1 where the non-woven fiber layer Consisting of membranes that Spun-bonded non-woven / Liquid-blown non-woven sheet / Spun-bonded non-woven web sheet 6. Non-woven fiber sheet / film according to claim 1, where the lengthening of the film at the fracture value in The layered sheet state in the machine-horizontal orientation is at least 10% greater than the lengthening. That is not woven at the maximum load in the horizontal direction of the machine 7. The non-woven fiber layer / film according to claim 1, which continues to be composed of the layered sheet A second layer of non-woven fiber joins the film layer on the surface of the said film layer as opposed to that of the non-woven fiber layer. 8. The non-woven fiber layer / film in accordance with Clause 7, where such non-woven layer and the second non-woven layer are combined with The order of the spun-bonded non-woven sheet, the liquid-blown non-woven sheet, and the spun-bonded non-woven sheet. 9. Non-woven fiber layer / film according to claim 1, where the layered sheet has a steam transmission rate of at least 300 g / sq m / 24 hours.