| abstract |
The breathable film of the present invention, having improved manufacturing properties and cost reduction properties, comprises a breathable film forming layer composition comprising a matrix polymer, particulate organic filler and a compatibilizer. Particulate organic fillers are incompatible with the matrix polymer and tend to aggregate when mixed with the matrix polymer alone. Compatibilizers are suitable for making stretched breathable films to achieve thermodynamic equilibrium between matrix polymer and filler within a limited filler particle size range. The film can be produced more easily than breathable films containing inorganic fillers and has a lower manufacturing cost. |