label sheet; adhesive sheet
A sheet of paper or film with adhesive backing, often used for printing labels or stickers. Wasei-eigo from English 'tack sheet'.
wasei-eigo (Japanese-coined English), from tack sheet
タックシートに宛名を印刷して、封筒に貼った。
I printed the addresses on a label sheet and stuck them on the envelopes.
Variant with interpunct; less common but seen in some product names.
Wasei-eigo from English 'tack sheet'. The exact origin is uncertain, but it likely combines 'tack' (as in adhesive tack) with 'sheet'.