Non-woven fabric, production method for same, and building material

Abstract

The present disclosure provides a non-woven fabric having a smooth surface and an excellent adhesive force with respect to an adhesive tape, for example, a waterproof tape.

1 . A non-woven fabric made from fibers containing a thermoplastic resin as a principal component, the non-woven fabric having a thickness CV value of 1.0% or more and 10.0% or less, a porosity seen from a surface of 10% or more and 30% or less, and a porosity seen from a surface CV value of 10% or more and 30% or less. 
     
     
         2 . The non-woven fabric according to  claim 1 , the non-woven fabric being used for a building material. 
     
     
         3 . The non-woven fabric according to  claim 1 , wherein an apparent density of the non-woven fabric is 0.40 g/cm 3  or more and 0.70 g/cm 3  or less. 
     
     
         4 . The non-woven fabric according to  claim 1 , wherein a basis weight of the non-woven fabric is 20 g/m 2  or more and 60 g/m 2  or less. 
     
     
         5 . A production method for the non-woven fabric according to  claim 1 , the production method comprising spinning a thermoplastic resin to form non-woven webs, then setting a temperature of the non-woven webs to 100° C. or more and 160° C. or less, and then bonding the non-woven webs such that a ratio A of an average single fiber diameter calculated in the following formula (1) is 0.85 or more and 0.95 or less,
     A =(Average single fiber diameter of non-woven webs before bonding(μm))/(Average single fiber diameter of non-woven fabric after bonding(μm))  (1)
 
 
     
     
         6 . A building material comprising the non-woven fabric according to  claim 1 .