Wood paste and objects made therefrom

Patent metadata

Field	Value
Publication number	US-11814524-B2
Application number	US-201916959856-A
Country	US
Kind code	B2
Filing date	Jan 7, 2019
Priority date	Jan 7, 2018
Publication date	Nov 14, 2023
Grant date	Nov 14, 2023

Abstract

The invention generally concerns methods and printing inks comprising wood chips/wood powder and plant-extracted natural binders for constructing wood 3D structures.

First claim

The invention claimed is:

1. A paste or plasticine-like mixture comprising water; at least one natural wood material selected from wood flour, wood chop and wood chips; cellulose nanocrystals (CNC); and at least one hemicellulose and/or lignin and/or starch, wherein the at least one natural wood material is free of unnatural or synthetic additives; the composition being for use in
(a) a process of fabrication of 3D wood objects; or
(b) a process for coating or covering a surface region of an object with the wood material;

wherein the mixture is free of formaldehyde, synthetic resins and/or epoxy based materials;
wherein the CNC is a crystalline rod-like material with a length of between 100 and 400 nm; and
wherein the amount of CNC is between 0.01 wt % and 20 wt %.

2. The mixture according to claim 1 , wherein the process of fabrication comprises casting, molding, extrusion, calendaring, injection, printing, hand-forming or manual processing.

3. The mixture according to claim 1 , comprising all naturally derived materials.

4. The mixture according to claim 1 , wherein the at least one wood material is a natural wood.

5. The mixture according to claim 4 , wherein the natural wood material is derivable from wood stalks, branches, trunk or wood bark.

6. The mixture according to claim 4 , wherein the wood material is obtained from a stalk, a branch, trunk or a bark of a tree or a bush selected from basswood, beech, birch, eucalyptus , walnut, pecan, cedar, cherry, elm, gum, hickory, lauan, mahogany, maple, oak, pine, poplar, redwood, rosewood, satinwood, sycamore, teak, alder, apple, aspen, chestnut, cottonwood, cypress, fir, hackberry, hemlock, holly, koa, laurel, locust, magnolia , pear-wood, spruce, tupelo and willow.

7. The mixture according to claim 6 , wherein the tree is eucalyptus.

8. The mixture according to claim 1 , wherein the at least one wood material is derived from hard or soft wood.

9. The mixture according to claim 1 , wherein the at least one hemicellulose is selected from xylan, glucuronoxylan, arabinoxylan, glucomannan, galactoglucomannan and xyloglucan.

10. The mixture according to claim 9 , wherein the hemicellulose is xyloglucan.

11. The mixture according to claim 1 , the composition comprising at least one wood material, CNC and a hemicellulose or starch or lignin.

12. The mixture according to claim 1 , the composition comprising at least one wood material, CNC and xyloglucan.

13. The mixture according to claim 1 , wherein the object is a polymeric object formed of a material selected amongst thermoplastic polymers and thermoset polymers.

14. A wood object manufactured from a mixture according to claim 1 .

Assignees

• Yissum Res Dev Co Of Hebrew Univ Jerusalem Ltd

Inventors

• Kam Doron
• Layani Michael
• Shoseyov Oded
• Magdassi Shlomo

Classifications

• C08L97/02 Primary

  Lignocellulosic material, e.g. wood, straw or bagasse {(manufacture of articles made from lignocellulosic material by dry processes B27N)} · CPC title

• C08K13/04

  Ingredients characterised by their shape and organic or inorganic ingredients · CPC title

• C08L1/02

  Cellulose; Modified cellulose · CPC title

• C08L3/02

  Starch; Degradation products thereof, e.g. dextrin · CPC title

• C08L5/14

  Hemicellulose; Derivatives thereof · CPC title