Breathable multilayer films for use in absorbent articles
An absorbent, product technology, applied in absorbent pads, nanotechnology for materials and surface science, coatings, etc., that can solve problems such as ineffective odor reduction
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Embodiment 1
[0054] This example illustrates the ability to form the multilayer film of the present invention. The film contains a base layer surrounded by two skin layers. The base layer contains 58% by weight of OMYAFILM 2 SST-FL, which is a calcium carbonate filler with a median particle size of 2 μm obtained from Omya, Inc. of Proctor, Vermont. The calcium carbonate filler was coated with 0.85% stearic acid. The base layer also includes Dowlex 2517 linear low polyethylene accounting for 19% by weight of the layer and Dowlex 2047A linear low polyethylene accounting for 23% by weight of the layer. They can Obtained from Dow Plastics Division of Dow Chemical Company of Midland, Michigan.
[0055] Each surface layer contains 40.8% by weight of the layer from Basell Polyolefins of Basell North America Inc., Wilmington, Delaware. Basell KS357P catalloy polymer. Basell Catalloy is an olefinic thermoplastic multi-step reactor product, in which amorphous ethylene propylene random The copolymer is...
Embodiment 2
[0060] The film was formed as described in Example 1, but without the deodorant filler. In particular, the base layer is the same as described in Example 1. Each surface layer contains 50% (weight) Basell KS357P catalloy polymer; 25% (weight) ethylene vinyl acetate LD755; and 25% ethylene vinyl acetate LD761.
[0061] The final basis weight is 18g / m 2 (gsm).
[0062] Results of Example 1-2
[0063] The films of Examples 1 and 2 were tested to compare their air permeability and deodorizing ability. The total surface layer thickness of the film sample A of Example 2 is 3% of the total film thickness. Three samples (B-D) of the film described in Example 1 were also evaluated. Samples B-D are the same as each other, except that the surface layer thicknesses of samples B-D are 3%, 5%, and 8% of the total film thickness, respectively.
[0064] Breathability
[0065] According to "Water Vapor Transmission Rate" (WVTR), the air permeability of samples A-D is measured, which usually re...
Embodiment 3
[0093] This example illustrates the ability to form the multilayer film of the present invention. The film includes a base layer surrounded by two surface layers. The base layer contains 58% by weight of the layer OMYAFILM 2 SST-FL, which is a calcium carbonate filler with a median particle size of 2μm obtained from Omya, Inc., Proctor, Vermont. The calcium carbonate filler is coated with 0.85% stearic acid. The base layer also contains 19% by weight of the layer Dowlex 2517 linear low polyethylene and 23% by weight of the layer Dowlex 2047A linear low polyethylene, which are available from the Dow Plastic Division of Dow Chemical Company, Midland, Michigan .
[0094] Each surface layer contains 35.8% by weight of the layer, Basell KS357Pcatalloy polymer from Basell Polyolefins of Basell North America Inc., Wilmington, Delaware. Basell Catalloy is the product of an olefinic thermoplastic multi-step reactor, in which an amorphous ethylene propylene random copolymer is molecularly...
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Abstract
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