Drawing substrate
In a first aspect, the present disclosure relates to a substrate 100 comprising an adhesive, a hygroexpansible material 110 and a hygroinert ink 120. In a second aspect, the present disclosure relates to a system comprising: a substrate 100 comprising a hygroexpansible material 110 and an adhesive. Further the system according to the second aspect comprises a writing instrument comprising an ink cartridge comprising a hygroinert ink 120.
1. A substrate comprising:
an adhesive,
a hygroexpansible material,
a hygroinert ink,
wherein the hygroexpansible material is hydrophilic and the hygroinert ink is hydrophobic and wherein the hygroexpansible material forms a hygroexpansible layer and the hygroinert ink forms a hygroinert layer, wherein the hygroinert layer is disposed at least on a part of the hygroexpansible layer, and wherein the adhesive is comprised within an adhesive layer;
wherein the substrate comprises a first section comprising the adhesive, and a second section attached to the first section,
wherein the second section comprises a free end.
2. A system comprising:
a substrate comprising a hygroexpansible material, an adhesive;
a writing instrument comprising an ink cartridge comprising a hygroinert ink,
wherein the hygroexpansible material is hydrophilic and the hygroinert ink is hydrophobic, and wherein the adhesive is comprised within an adhesive layer,
wherein the substrate comprises a first section comprising the adhesive, and a second section attached to the first section,
wherein the second section comprises a free end.
3. The substrate according to claim 1 , wherein the hygroexpansible material is configured to swell and the hygroinert ink is configured not to swell.
4. The substrate according to claim 1 , wherein the hygroinert ink covers between about 0.5% to about 100% of a hygroexpansible material's surface.
5. The substrate according to claim 1 , wherein the hygroexpansible material comprises a sporopollenin.
6. The substrate according to claim 1 , wherein the hygroexpansible material comprises pollen paper.
7. The substrate according to claim 1 , wherein the hygroexpansible material has a Young's modulus between about 90 to about 1200 MPa.
8. The substrate according to claim 1 , wherein the hygroinert ink has a Young's modulus between about 5000 to about 20000 MPa, when dry.
9. The substrate according to claim 1 , wherein the hygroinert ink is configured to seal the hygroexpansible material from a solvent.
10. The substrate according to claim 9 , wherein the solvent is water.
11. The substrate according to claim 1 , wherein the hygroinert ink forms at least one hygroinert ink layer.
12. The substrate according to claim 11 , wherein the hygroinert ink layer is configured to absorb tensile forces.
13. The substrate according to claim 1 , wherein the hygroinert ink comprises a first polymer which is a hydrocarbon polymer.
14. The substrate according to claim 13 , wherein the first polymer is an aromatic hydrocarbon polymer.
15. The substrate according to claim 13 , wherein the first polymer is a styrene acrylate copolymer and/or polystyrene.
16. The substrate according to claim 1 , further comprising a mechanochromic material.
17. The substrate according to claim 13 , wherein the hygroexpansible material comprises a sporopollenin and/or wherein the first polymer is a styrene acrylate copolymer and/or polystyrene.