SYSTEMS AND DEVICES FOR TRANSFERRING IMAGES TO ARTICLES AND METHODS OF MAKING THE SAME
Transfer assemblies and transfer sheets and release paper for transferring images to articles, such as textiles, fabric or the like, are provided. In addition, improved methods for manufacturing the transfer sheets and the articles are provided. A transfer sheet comprises a support layer and an image transfer layer that includes an ink receptor and a blocking agent. The blocking agent is configured to block or impede the transfer of the ink composition to the substrate in non-printed areas of the image and substantially allow the transfer of the ink composition to the substrate in printed areas of the image. The systems and methods described herein provide a single step process that is “self-weeding”, while minimizing defects in the image that is printed onto the article and are particularly useful for transferring white or colored images to dark colored or black textiles and other fabrics.
1 . A transfer sheet for transferring an image onto a substrate produced by a process comprising:
providing a support layer and an image transfer layer in contact with the support layer, the image transfer layer comprising an ink receptor and a blocking agent; and
applying heat and pressure to the image transfer layer such that the image transfer layer is heated to a temperature of less than about 180 degrees Fahrenheit during production.
2 . The transfer sheet of claim 1 , wherein the image transfer layer is heated to a temperature of about 120 degrees Fahrenheit to about 180 degrees Fahrenheit during production.
3 . The transfer sheet of claim 1 , wherein the image transfer layer is heated to a temperature of about 140 degrees Fahrenheit to about 150 degrees Fahrenheit during production.
4 . The transfer sheet of claim 1 , further comprising applying a release layer between the support layer and the image transfer layer, wherein the viscosity of the release layer is about 25 CPS to about 90 CPS.
5 . The transfer sheet of claim 4 , wherein the viscosity of the release layer is about 50 CPS to about 60 CPS.
6 . The transfer sheet of claim 1 , further comprising applying an ink composition onto a surface of the image transfer layer thereby defining printed areas and non-printed areas, wherein the ink composition comprises a liquid carrier, wherein the blocking agent is substantially disrupted by the liquid carrier in the printed areas and the blocking agent is substantially not disrupted by the liquid carrier in the non-printed areas.
7 . The transfer sheet of claim 1 , wherein the substrate is a dark colored or black textile.
8 . The transfer sheet of claim 1 , wherein the image transfer layer comprises a partially fluid coating having a viscosity of about 25 CPS to about 200 CPS.
9 . The transfer sheet of claim 1 , further comprising contacting the transfer sheet with the substrate and applying heat and pressure to the transfer sheet at a temperature and for a time period such that a degree of cure of the coating composition in the substrate is less than 100%.
10 . The transfer sheet of claim 9 , wherein the degree of cure is about 30% to about 80%.
11 . The transfer sheet of claim 9 , wherein the time period is about 15 to about 20 seconds.
12 . The transfer sheet of claim 9 , further comprising aging the sheet to increase the degree of cure of the coating composition within the substrate.
13 . A transfer sheet for transferring an image onto a substrate, the transfer sheet comprising:
a support layer;
an image transfer layer overlying the support layer and comprising an ink receptor and a blocking agent; and
a release layer between the support layer and the image transfer layer, wherein the viscosity of the release layer is about 25 CPS to about 90 CPS.
14 . The transfer sheet of claim 13 , wherein the viscosity of the release layer is about 50 CPS to about 60 CPS.
15 . The transfer sheet of claim 13 , wherein the ink receptor is configured to receive an ink composition so as to define printed areas and non-printed areas in the image transfer layer, wherein the blocking agent is configured to substantially impede the transfer of the ink composition to the substrate in the non-printed areas and substantially allow transfer of the ink composition to the substrate in the printed areas.
16 . The transfer sheet of claim 13 , wherein the image transfer layer comprises a partially fluid coating having a viscosity of about 25 CPS to about 200 CPS.
17 . The transfer sheet of claim 16 , wherein the viscosity of the image transfer layer is about 100 CPS to about 130 CPS.
18 . The transfer sheet of claim 13 , wherein the image transfer layer comprises a first layer comprising the ink receptor and the blocking agent and a second layer comprising a binder.
19 . The transfer sheet of claim 18 , wherein the first and second layers are mixed together.
20 . The transfer sheet of claim 18 , further comprising a third layer between the first and second layers, the third layer comprising one or more materials that increase an opacity of the image transfer layer, wherein the first and third layers are mixed together.
21 . The transfer sheet of claim 13 , wherein the substrate is a dark colored or black textile and the textile comprises cotton or cotton/polyester blends.
22 . The transfer sheet of claim 13 , wherein the ink composition comprises a liquid carrier, wherein the blocking agent is substantially disrupted by the liquid carrier in the printed areas and the blocking agent is substantially not disrupted by the liquid carrier in the non-printed areas.