Method of separating an exposed thermal transfer assemblage

[0203]This example shows a result of exposing, treating, and separating with a compliant, adhesive roller.

[0204]The assemblage used was a receiver element of a color filter glass sheet with an organic black mask, functionalized by thermal mass transfer with blue filters and red filters, and a donor element with a green pigmented transfer layer suitable for transferring green filters. The treating used a roller with a diameter of 8 cm, rolled over the support layer of the donor element of the assemblage at 5 cm per second for a distance of 2 m while an apparent atmospheric pressure of about 10,000 Pa was maintained in the assemblage on the vacuum table.

[0205]The 8 cm diameter roller was made up of a hollow steel cylinder with an inner diameter of 5 cm and an outer diameter of 6 cm. The hollow steel cylinder was covered with a 1 cm thickness of rubbery adhesive material referred to as “Super Polyurethane”. The Shore durometer (A scale unless otherwise specified; as in ASTM D2240-00) o...

[0208]This example illustrates moving the support layer of the donor element with respect to the receiver element immobilized on the vacuum table. The effective movement was found to be a shearing movement performed by moving the position of the support layer from a first position to a second position relative to the receiver element along a direction substantially parallel to the support layer. The movement was especially effective when carried out parallel or perpendicular to the edges of the image.

[0209]An imaged assemblage was made from a blue-transfer-layer imaged color filter glass substrate with an organic black mask as the receiver element, and a red pigmented transfer layer donor element. The assemblage was made on the vacuum table of the exposing apparatus. The assemblage was exposed by a laser head while held on a vacuum table. The vacuum table maintained a lowered pressure of approximately 10,000 Pa in the assemblage during imaging and treatment.

[0210]The treatment was c...

[0217]This example used an adhesive tape to produce a movement of the support layer with respect to the receiver element held by the vacuum table. The experiment was analogous to the previous example using a metal plate, however the treating step was carried out by the application and removal of an adhesive tape.

[0218]The tape used was Polyken 781 splicing tape by Tyco Adhesives, Franklin, Ky. This blue tape is about 5 cm (2 inches) wide and 0.11 mm thick. It is a single coated tape of a silicone rubber adhesive on a polyester film carrier. The tape has excellent shear strength and is a very good adhesive. Adhesion to steel is 385 N / m by test method PSTC-1 (Pressure Sensitive Tape Council, Northbrook, Ill.).

[0219]An imaged assemblage was made from a blue-transfer-layer imaged color filter glass substrate with an organic black mask receiver element, and a red pigmented transfer layer donor element. The assemblage was held on a vacuum table and exposed by a laser head. Separately, num...