Synthetic polymer film provided with surface having sterilizing effect, method for manufacturing synthetic polymer film and sterilization method using surface of synthetic polymer film

A synthetic polymer film having a first surface which has a plurality of raised portions, wherein:

• a two-dimensional size of the plurality of raised portions is in a range of greater than 20 nm and less than 500 nm when viewed in a normal direction of the synthetic polymer film, the first surface having a microbicidal effect;
• a logarithmic value of a value obtained by dividing a bacteria count after culturing for 24 hours on a polyethylene terephthalate (PET) film by a bacteria count after culturing for 24 hours on the first surface is more than 3.8;
• the synthetic polymer film includes a fluorine element in a profile that a fluorine content is not constant in a thickness direction but is higher in a first portion closer to the plurality of raised portions than in a second portion farther from the plurality of raised portions;
• the first portion includes a third portion that is formed from a first photocurable resin, the first photocurable resin including a fluorine-containing acrylic monomer, an acryloyl group-containing monomer, and no urethane acrylate monomer;
• the first portion further includes a fourth portion that is formed from the first photocurable resin and a second photocurable resin, the second photocurable resin including a urethane acrylate monomer;
• the second portion is formed from the second photocurable resin;
• the second portion and the fourth portion are in contact with each other;
• the entirety of the plurality of raised portions is included in the first portion;
• the synthetic polymer film includes, at a second surface opposite to the first surface, a nitrogen element which is not a constituent of a tertiary amine in a proportion of not less than 1.035 at %;
• the entirety of the plurality of raised portions is included in the third portion;
• the third portion and the fourth portion are in contact with each other;
• and
• the fourth portion is between the third portion and the second portion in the thickness direction.