초록 ▼

The present invention relates to thermoplastic compositions for making a liquid impermeable moisture vapor permeable layer by coating the composition onto a substrate. The thermoplastic compositions comprise preferred thermoplastic polymers and suitable hydrophilic plasticizers that also enhance the

The present invention relates to thermoplastic compositions for making a liquid impermeable moisture vapor permeable layer by coating the composition onto a substrate. The thermoplastic compositions comprise preferred thermoplastic polymers and suitable hydrophilic plasticizers that also enhance the moisture vapor permeability of films or layers made from the thermoplastic compositions. The layers made from the thermoplastic compositions of the present invention can find a variety of applications wherein moisture vapor permeability is desirable, such as within absorbent articles for example diapers, sanitary napkins, panty liners and incontinence products, and also protective bedding covers, protective clothing and the like.

대표청구항 ▼

1. A continuous film or layer formed from a thermoplastic composition comprising:a thermoplastic polymer or mixture of polymers selected from the group consisting of polyurethanes, poly-ether-amides block copolymers, polyethylene-acrylic acid copolymers, polyethylene oxide and its copolymers, poly l

1. A continuous film or layer formed from a thermoplastic composition comprising:a thermoplastic polymer or mixture of polymers selected from the group consisting of polyurethanes, poly-ether-amides block copolymers, polyethylene-acrylic acid copolymers, polyethylene oxide and its copolymers, poly lactide and copolymers, polyanides, polyester block copolymers, sulfonated polyesters, poly-ether-ester block copolymers, poly-ether-ester-amide block copolymers, polyacrylates, polyacrylic acids, ionomers, polyethylene-vinyl acetate with a vinyl acetate content of more than 28 weight %, polyvinyl alcohol and its copolymers, polyvinyl ethers and their copolymers, poly-2-ethyl-oxazoline, polyvinyl pyrrolidone and its copolymers, and mixtures thereof, a suitable compatible hydrophilic plasticiser blend of hydrophilic plasticisers, said thermoplastic composition having a viscosity of from 50 poise to 4000 poise at a frequency of 1 rad/s at a temperature of 210.degree. C. or less and a viscosity of less than 2000 poise at a frequency of 1000 rad/s at a temperature of 210.degree. C. or less, wherein said compatible hydrophilic plastcisers are selected from the group consisting of acids, esters, amides, alcohols, polyalcohols, and mixtures thereof, and wherein said continuous film or layer is liquid impervious and has a water vapour transmission rate of at least 300 g/m2?24 h, said water vapour transmission rate measured at 23.degree. C. according to the ASTM E-96 "Upright Cup" method.