| 摘要 |
PURPOSE:To obtain a substrate for application, composed of a melt blown ultrafine fiber nonwoven fabric, consisting of specific saponified ethylene-vinyl acetate copolymer and having a specific fiber diameter and useful as fomentation drugs and first aid adhesive tapes. CONSTITUTION:The objective substance obtained by melting a polymer consisting essentially of saponified ethylene-vinyl acetate copolymer with 40-60mol% ethylene content and 0.055-0.085l/g intrinsic viscosity, then spinning the resultant melt according to a melt blowing method to provide an ultrafine fiber nonwoven fabric having <=8mu average fiber diameter and carrying out treatment for densifying at least one surface thereof and bonding most of fiber contact parts into a discontinuous pattern form. The obtained melt blown ultrafine fiber nonwoven fabric is flexible, excellent in stretchability and extensibility, good in compliance with skin and coating properties of drugs and capable of exhibiting hydrophilicity, lipophilicity and chemical resistance with a high extension breaking strength, air and moisture permeability. |
