Outer pressed (overlaminating) adhesive membranes

Outer-pressed (over-laminating) adhesive membranes have been used to protect printing through heat transfer.

Now, over-laminating adhesive membranes are being used to protect printing surfaces generated through heat transfer printing, inkjet printing, offset printing, relief printing, intaglio printing, and more from water, sun, abrasion, and more. The outer pressed adhesive film generally consists of a surface substrate stripping material in the form of a transparent film and an adhesive layer sandwiched between the two. The stripping material is stripped from the film when used.

Adhesives for outer pressed adhesive films include emulsion, solvent-based, solvent-free, and various adhesives made of rubber-based acrylic, or vinyl ether-based compounds. Of these adhesives, acrylic adhesives are the more suitable to use as this adhesive has excellent weather resistance, peel stability over time, and transparency. In particular, special attention has recently been paid to emulsified acrylic adhesives, which do not contain organic solvents that are harmful to humans and are therefore beneficial to the environment (see for example Japanese patent application delay disclosure Nos2001-240819 and 2002-80809).

But in general, emulsion adhesive and solvent adhesive compared to the obvious in the water white resistance and water resistance viscosity is poor. In addition, if the above acrylic emulsion adhesive is used to produce an outer pressed adhesive film by means of a so-called transfer coating method, in which the adhesive is applied to the stripped material and the transparent film is subsequently laminated to the adhesive, an additive such as a surfactant intended to improve the wettability of the adhesive to the stripped material is added to the adhesive. However, adding additives will cause the water resistance of the adhesive film to decrease. In particular, if the outer pressed adhesive film is laminated onto an inkjet printing surface, there is a problem with ink water when the printing surface is stored in wet conditions.