MANUFACTURING PROCESS FOR COATED POLYESTER FILM
First Claim
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1. A method of producing a biaxially oriented composite film comprising a polyester substrate supporting one or more coatings on one or both surfaces of said substrate, wherein said polyester substrate is a biaxially oriented film, said method comprising the steps of:
- disposing on one or both surfaces of said polyester substrate said coating wherein said coating is derived from a predominantly inorganic hardcoat coating composition comprising inorganic particles contained in a polymerisable predominantly inorganic matrix; and
subsequently annealing said biaxially oriented composite film at a temperature Ta (°
C.) above Tg where Tg<
Ta≦
Tg+100 (°
C.) for a time t after thermal equilibrium where 1 hour ≦
t≦
72 hours.
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Abstract
A biaxially oriented composite film includes a polyester substrate supporting one or more coatings on one or both surfaces of said substrate,
- wherein the polyester substrate is a biaxially oriented film;
- wherein the one or more coatings is/are derived from a predominantly inorganic hardcoat coating composition including inorganic particles contained in a polymerisable predominantly inorganic matrix; and wherein the biaxially oriented composite film has been annealed at a temperature Ta (° C.) above Tg where Tg<Ta≦Tg+100 (° C.) for a time t after thermal equilibrium where 1 hour ≦t≦72 hours. A method of making the film is provided.
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Citations
31 Claims
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1. A method of producing a biaxially oriented composite film comprising a polyester substrate supporting one or more coatings on one or both surfaces of said substrate, wherein said polyester substrate is a biaxially oriented film, said method comprising the steps of:
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disposing on one or both surfaces of said polyester substrate said coating wherein said coating is derived from a predominantly inorganic hardcoat coating composition comprising inorganic particles contained in a polymerisable predominantly inorganic matrix; and subsequently annealing said biaxially oriented composite film at a temperature Ta (°
C.) above Tg where Tg<
Ta≦
Tg+100 (°
C.) for a time t after thermal equilibrium where 1 hour ≦
t≦
72 hours. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A biaxially oriented composite film comprising a polyester substrate supporting one or more coatings on one or both surfaces of said substrate,
wherein said polyester substrate is a biaxially oriented film; -
wherein said one or more coatings is/are derived from a predominantly inorganic hardcoat coating composition comprising inorganic particles contained in a polymerisable predominantly inorganic matrix; and wherein the biaxially oriented composite film has been annealed at a temperature Ta (°
C.) above Tg where Tg<
Ta≦
Tg+100(°
C.) for a time t after thermal equilibrium where 1 hour ≦
t≦
72 hours. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification