Lightweight paper board
First Claim
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1. A composition forming a foamed structure, comprising:
- (a) a fibrous material selected from a group including a cellulosic fiber, or a combination of the cellulosic fiber and a synthetic fiber;
(b) a fibrillated cellulose selected from a group including a microfibrillated cellulose, a nanofibrillated cellulose, or a combination thereof, a concentration of the fibrillated cellulose being up to about 10 wt %;
(c) a cross-linker, said cross-linker being a polyaminoamide epichlorohydrin, the concentration of the cross-linker being up to about 2.5 wt %;
(d) a surfactant;
(e) water;
wherein;
the foamed structure has a density less than about 0.15 g/cc;
the foamed structure that contains the fibrillated cellulose at the concentration in (b) above and does not contain the cross-linker has an average dry tensile strength less than the average dry tensile strength of the foamed structure that contains both the fibrillated cellulose at the concentration in (b) above and the cross-linker at the concentration in (c) above; and
the foamed structure that contains the cross-linker at the concentration in (c) above and does not contain the fibrillated cellulose has the average dry tensile strength less than the average dry tensile strength of the foamed structure that contains both the fibrillated cellulose at the concentration in (b) above and the cross-linker at the concentration in (c) above.
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Abstract
A fibrous material, method for making the same, and articles comprising the same are shown and described. The fibrous material is a low density material that exhibits high strength properties. In embodiments, the fibrous material has a density of 0.15 g/cm3 or less and a tensile strength of 10 N/inch or greater. The fibrous material may be in the form of a paperboard and is suitable for use in a variety of applications including as a packaging material.
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Citations
21 Claims
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1. A composition forming a foamed structure, comprising:
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(a) a fibrous material selected from a group including a cellulosic fiber, or a combination of the cellulosic fiber and a synthetic fiber; (b) a fibrillated cellulose selected from a group including a microfibrillated cellulose, a nanofibrillated cellulose, or a combination thereof, a concentration of the fibrillated cellulose being up to about 10 wt %; (c) a cross-linker, said cross-linker being a polyaminoamide epichlorohydrin, the concentration of the cross-linker being up to about 2.5 wt %; (d) a surfactant; (e) water; wherein; the foamed structure has a density less than about 0.15 g/cc; the foamed structure that contains the fibrillated cellulose at the concentration in (b) above and does not contain the cross-linker has an average dry tensile strength less than the average dry tensile strength of the foamed structure that contains both the fibrillated cellulose at the concentration in (b) above and the cross-linker at the concentration in (c) above; and the foamed structure that contains the cross-linker at the concentration in (c) above and does not contain the fibrillated cellulose has the average dry tensile strength less than the average dry tensile strength of the foamed structure that contains both the fibrillated cellulose at the concentration in (b) above and the cross-linker at the concentration in (c) above. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification