抄録
In an examination of sexual crime cases, the possibility that constituent fibers of the top sheet of a sanitary napkin or a panty liner, which the victim may have been using, might stick to the suspect's hands and fingers were examined.
Nineteen brands of sanitary products (15 sanitary napkin brands and 4 panty liner brands) were classified, by their material of the top sheet, in 12 brands of non-woven fabrics and 7 brands of porous films. The 12 brands of non-woven fabrics products were classified by their bonding process in 2 types, i.e. thermal bonding (through-air oven bonding) and mechanical bonding. Meanwhile out of 19 brands of products, 9 products have non-woven fabrics on both sides of the top sheet to prevent leakage and all of their bonding processes are thermal bonding (point-bond hot calendaring).
Next, materials stuck to two subjects' fingers were collected on a transparent adhesive tape and examined whether constituent fibers came off and stuck to their fingers when two subjects rubbed the surface of a sample with their fingers. It was found that constituent fibers of non-woven fabrics stuck to the transparent adhesive tape.
As a result, it was found that constituent fibers of non-fabrics came off by rubbing and stuck to fingers and hands, though those of porous films did not stick to them. Consequently, it is suggested that examination of constituent fibers of sanitary products is noteworthy for sexual crime cases.
