Patent ID: 6235140
Filing Date: 2001-05-22
Classification: B32B,B41M,B44C,B44F,Y10T

Abstract:
A method for producing a decorative intermediate film for use in a laminated glass sheet, sequentially comprising the following steps:depositing a printing ink onto a transfer sheet substrate to form a printed pattern surface on said transfer sheet substrate, said printing ink comprising a polyvinylbutyral vehicle;providing an intermediate film comprising a polyvinylbutyral sheet having fine projections and recesses formed on both surfaces thereof;applying a solution onto said pattern surface and/or onto said intermediate film, wherein said solution softens both the vehicle in said printing ink and said intermediate film while maintaining the fine projections and recesses formed on said intermediate film;superposing said pattern surface onto said intermediate film through the surface to which the solvent composition has been applied;pressing said superposed pattern surface into said intermediate film at a temperature which ranges from 0.degree. C. to 30.degree. C., said temperature being below a glass transition point of said intermediate film, to impregnate said printed pattern into said intermediate film;separating said transfer sheet substrate from said intermediate film having the thus impregnated pattern; anddrying said intermediate film.