Fluorescent display
First Claim
1. A transparent fluorescent display, comprising a laminate between two glass panes, at least one film A of the laminate containing a polyvinyl acetal PA and, optionally, at least one plasticizer WA, and at least one film B of the laminate containing a polyvinyl acetal PB and at least one plasticizer WB wherein prior to lamination, film A has less than 22 wt. % plasticizer WA and 0.001 to 5 wt. % fluorophores and film B has at least 22 wt. % plasticizer WB and 0.005 -5 wt. % UV absorber, and wherein in the display, film A and film B are in direct contact with each other.
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Accused Products
Abstract
Fluorescent displays are manufactured by lamination of at least one film A containing a polyvinyl acetal PA and, optionally, a plasticizer WA and at least one film B containing a polyvinyl acetal PB and at least one plasticizer WB between two glass panes, wherein prior to lamination, film A contains less than 22 wt. % plasticizer WA and contains 0.001 to 5 wt. % fluorophores, and film B contains at least 22 wt. % plasticizer WB and contains 0.005-5 wt. % UV absorber, each before lamination.
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Citations
20 Claims
- 1. A transparent fluorescent display, comprising a laminate between two glass panes, at least one film A of the laminate containing a polyvinyl acetal PA and, optionally, at least one plasticizer WA, and at least one film B of the laminate containing a polyvinyl acetal PB and at least one plasticizer WB wherein prior to lamination, film A has less than 22 wt. % plasticizer WA and 0.001 to 5 wt. % fluorophores and film B has at least 22 wt. % plasticizer WB and 0.005 -5 wt. % UV absorber, and wherein in the display, film A and film B are in direct contact with each other.
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20. A transparent fluorescent display, comprising a laminate between two glass panes, at least one film A of the laminate containing a polyvinyl acetal PA and, optionally, at least one plasticizer WA, and at least one film B of the laminate containing a polyvinyl acetal PB and at least one plasticizer WB, wherein prior to lamination, film A has less than 22 wt. % plasticizer WA and 0.001 to 5 wt. % fluorophores, and film B has at least 22 wt. % plasticizer WB and 0.005-5 wt. % UV absorber, wherein in the display, film A and film B are in direct contact with each other, and wherein at least one UV absorber is a UV absorber which does not migrate or one having a low tendency to migrate into film A from film B, and is selected from the group consisting of polymeric UV absorbers, poorly soluble UV absorbers which have a solubility of less than 5 g/L in a combination of polyvinyl acetal PB and plasticizer WB, UV absorbers containing ionic groups, UV absorbers chemically bonded to polyvinylacetal, and nano-TiO2, and/or wherein the fluorophores of film B do not migrate, or are fluorophores having a low tendency to migrate selected from the group consisting of fluorescing inorganic particles, substituted perylenes, rylenes, quinacridone derivatives, fluorescent dyes with ionic groups, and polymeric fluorophores.
Specification