Screen printing stencil
AssigneeSericol Limited
InventorsPeter Dickinson, Nicholas R. Collins
Life of this patent
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Abstract
A photopolymerizable composition for making screen printing stencils. The composition comprises polyvinyl alcohol having at least one photocrosslinkable group appended thereto. At least one metal salt, wherein the metal is selected from: aluminum, zinc, chromium, zirconium, titanium, tin or iron, is added to the composition. The metal salt is used to improve water resistance of a screen printing image that is prepared from the photopolymerizable composition.
Claims23
A photopolymerisable composition for making screen printing stencils, the composition comprising polyvinyl alcohol having at least one photocrosslinkable group appended thereto and a zirconium salt.
A method for preparing a stencil for screen printing, the method comprising the step of (a) using the composition comprising polyvinyl alcohol having at least one photocrosslinkable group appended thereto and at least one metal salt wherein the metal is selected from:
- zinc, chromium, zirconium, titanium, tin and iron to produce a stencil for screen printing.
A method of using a metal salt wherein the metal is selected from:
- zinc, chromium, zirconium, titanium, tin and iron, to improve water resistance of a screen printing image which is prepared from a photopolymerisable composition comprising polyvinyl alcohol having at least one photocrosslinkable group appended thereto comprising (a) adding the metal salt to the photopolymerizable composition, and (b) making a stencil from the composition.
A method for preparing a stencil for screen printing, the method comprising the step of (a) using the composition comprising polyvinyl alcohol having at least one photocrosslinkable group appended thereto and at least one metal salt wherein the metal is selected from:
- zinc, chromium, zirconium, titanium, tin and iron and wherein the at least one photocrosslinkable group is at least one styryl pyridinium salt, to produce a stencil for screen printing.
A screen for screen printing coated with a photopolymerisable composition for making screen printing stencils, the composition comprising polyvinyl alcohol having at least one photocrosslinkable group appended thereto and at least one metal salt, and wherein the metal of the metal salt is at least one selected from the group consisting of aluminum, zinc, chromium, zirconium, titanium, tin and iron.
A screen for screen printing coated with a photopolymerisable composition for making screen printing stencils, the composition comprising polyvinyl alcohol having at least one styryl pyridinium salt as a photocrosslinkable group appended thereto and at least one metal salt, and wherein the metal of the metal salt is at least one selected from the group consisting of aluminum, zinc, chromium, zirconium, titanium, tin and iron.
Dependencies are inferred from the claim text.