HIGH CELLULOSE CONTENT, LAMINIFEROUS NONWOVEN FABRIC
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Abstract
The present invention provides a laminiferous nonwoven fabric with a high woodpulp content suitable for use in wipes, absorbent articles and other applications, and a method of making the same. The laminiferous nonwoven comprises 3 layers bonded together, where the outer layers are lightweight meltspun webs and the middle layer comprises mainly woodpulp fibres. Each of the first (3), second (2) and third (4) nonwoven layer are preferably first formed separately and individually to be self-supported webs, whereafter the three self-supported webs are brought together essentially immediately before bonding them together. When used as a substrate for wet wipes, the inventive fabric exhibits a combination of several useful properties; good wet and dry softness and bulk, good wet abrasion resistance and low wet linting propensity, and where the majority raw material is woodpulp.
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Citations
62 Claims
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1-31. -31. (canceled)
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32. A method for manufacturing laminiferous nonwoven fabrics,
providing at least a first nonwoven layer, consisting essentially of natural cellulose fibres and thermoplastic fibres, and applying on both sides of said first layer, a second and a third nonwoven layer, which second and third nonwoven layers consist essentially of melt-spinnable fibres and each second and third nonwoven layer having a basis weight of 12 gsm or less and, wherein at least one of the second or third nonwoven layers is formed separately and individually to be a self-supporting web with a geometric mean wet tensile strength/basis weight ratio of at least 7 N/m per gsm, the nonwoven fabric comprises at least 50% by weight cellulose, the first layer is formed by air forming process, and the three webs are bonded using ultrasonic, thermal or adhesive bonding.
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46. A laminiferous nonwoven fabric, comprising:
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at least a first nonwoven layer, consisting essentially of natural cellulose fibres and thermoplastic fibres, on both sides of said first layer, a second and a third nonwoven layer, which second and third nonwoven layers consist essentially of melt-spinnable fibres and each second and third nonwoven layer having a basis weight of 12 gsm or less, wherein the first layer is formed by air forming process, at least one of the second or third nonwoven layers is formed separately and individually to be a self-supporting web with a geometric mean wet tensile strength/basis weight ratio of at least 7 N/m per gsm, the nonwoven fabric comprises at least 50% by weight cellulose, and the three webs are bonded together using ultrasonic, thermal or adhesive bonding. - View Dependent Claims (47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62)
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Specification