Paper composition and methods therefor

• US 5,354,424 A
• Filed: 01/24/1992
• Issued: 10/11/1994
• Est. Priority Date: 02/10/1989
• Status: Expired due to Term

• Current Assignee: Alko Ltd.
• Original Assignee: Alko Ltd.
• Inventors: Rha, Chokyun, Timonen, Maritta
• Primary Examiner(s): Chin, Peter
• Application Number:
  US07/825,037
• Time in Patent Office: 991 Days
• Field of Search: 162/175, 162/176, 162/177, 162/178, 162/135, 427/394, 427/395, 106/169
• US Class Current: 162/135
• CPC Class Codes: A21D 2/18 Carbohydrates
• CPC Class Codes: A23D 7/0056 Spread compositions
• CPC Class Codes: A23D 7/015 Reducing calorie content; Reducing fat content , e.g. "halvarines"
• CPC Class Codes: A23G 2200/06 containing beet sugar or cane sugar if specifically mentioned or containing other carbohydrates, e.g. starches, gums, alcohol sugar, polysaccharides, dextrin or containing high or low amount of carbohydrate
• CPC Class Codes: A23G 3/343 Products for covering, coating, finishing, decorating
• CPC Class Codes: A23G 3/42 characterised by the carbohydrates used, e.g. polysaccharides containing dairy products A23G3/46
• CPC Class Codes: A23G 3/48 containing plants or parts thereof, e.g. fruits, seeds, extracts containing gums A23G3/42
• CPC Class Codes: A23L 29/212 Starch; Modified starch; Starch derivatives, e.g. esters or ethers containing starch hydrolysates, e.g. dextrin, A23L29/30
• CPC Class Codes: A23L 29/219 Chemically modified starch; Reaction or complexation products of starch with other chemicals
• CPC Class Codes: A23L 29/231 Pectin; Derivatives thereof
• CPC Class Codes: A23L 29/238 from seeds, e.g. locust bean gum or guar gum starch A23L29/212; pectin A23L29/231
• CPC Class Codes: A23L 29/25 Exudates, e.g. gum arabic, gum acacia, gum karaya or tragacanth
• CPC Class Codes: A23L 29/256 from seaweeds, e.g. alginates, agar or carrageenan
• CPC Class Codes: A23L 29/262 Cellulose; Derivatives thereof, e.g. ethers
• CPC Class Codes: A23L 29/269 of microbial origin, e.g. xanthan or dextran
• CPC Class Codes: A23L 29/272 Gellan
• CPC Class Codes: A23L 29/275 of animal origin, e.g. chitin
• CPC Class Codes: A23L 29/35 Degradation products of starch, e.g. hydrolysates, dextrins; Enzymatically modified starches
• CPC Class Codes: A23L 33/21 Addition of substantially indigestible substances, e.g. dietary fibres
• CPC Class Codes: A23L 33/24 Cellulose or derivatives thereof
• CPC Class Codes: C08B 11/20 : Post-etherification treatments of chemical or physical type, e.g. mixed etherification in two steps, including purification
• CPC Class Codes: C08B 15/02 : Oxycellulose; Hydrocellulose; Cellulosehydrate, e.g. microcrystalline cellulose
• CPC Class Codes: C12P 19/14 : produced by the action of a carbohydrase (EC 3.2.x), e.g. by alpha-amylase , e.g. by cellulase, hemicellulase
• CPC Class Codes: D21H 17/005 : Microorganisms or enzymes
• CPC Class Codes: D21H 17/24 : Polysaccharides
• CPC Class Codes: D21H 21/18 : Reinforcing agents

Abstract

A paper product treated with a degradation product of a polysaccharide derivative comprising a mixture of oligomers of the polysaccharide derivative, a majority of said oligomers having a degree of polymerization such that the oligomer conforms to a rod-like configuration.

Claims

1. A paper product treated with a degradation product of a cellulose derivative comprising a mixture of oligomers of the cellulose derivative, a majority of said oligomers having a degree of polymerization of between about 5 and about 50.

2. A paper product as claimed in claim 1 wherein the degradation product consists essentially of the mixture of oligomers.

3. A paper product as claimed in claim 1 wherein the cellulose derivative has at least one substituent selected from the group consisting of carboxymethyl, methyl, hydroxypropyl, amino, methylethyl, hydroxyethyl, hydroxymethylethyl, hydroxypropylmethyl, hydroxypropylethyl, sulfate, carboxylic acid, carboxylic acid ester and pyruvate.

4. A paper product as claimed in claim 1 wherein the cellulose derivative is selected from the group consisting of carboxymethyl cellulose, ethylmethyl cellulose, hydroxypropylethyl cellulose, methyl cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, hydroxymethylethyl cellulose and mixtures thereof.

5. A paper product as claimed in claim 4 wherein the cellulose derivative is carboxymethyl cellulose.

6. A paper product as claimed in claim 5 wherein the mixture of oligomers has an average molecular weight of less than about 15,000 daltons.

7. A paper product as claimed in claim 1 wherein the mixture of oligomers have a molecular weight distribution such that the mixture has a polydispersity index of less than about two and the degradation product contains less than about 25% by weight of monosaccharides, disaccharides or mixtures thereof.

8. A paper product as claimed of claim 7 wherein the degradation product contains less than about 10% by weight of monosaccharides, disaccharides or mixtures thereof.

9. A method of increasing the strength of paper comprising,

treating the paper with a degradation product of a cellulose derivative comprising a mixture of oligomers of the cellulose derivative, a majority of the oligomers having a degree of polymerization between about 5 and about 50.

10. A method as claimed in claim 9 further comprising treating the paper with additional agents selected from the group consisting of dyes, colorants, wet-strength agents, and defoamers.

11. A method as claimed in claim 9 wherein the treatment step involves coating the paper by dipping, spraying, rolling or admixing.

12. In a method of paper manufacture having the steps of:

(a) pulping the fibers;

(b) refining the paper stock;

(c) forming the paper sheet; and

(d) drying the paper sheet,

the improvement comprising;

treating the paper with a degradation product of a cellulose derivative comprising a mixture of oligomers of the cellulose derivative, a majority of said oligomers having a degree of polymerization between about 5 and 50.

13. A method as claimed in claim 12 wherein in the treatment step the cellulose derivative has at least one substituent selected from the group consisting of carboxymethyl, methyl, amino, hydroxypropyl, methylethyl, hydroxypropylethyl, hydroxyethyl, hydroxypropymethyl, hydroxymethylethyl, hydroxypropylmethyl, sulfate, carboxylic acid, carboxylic acid ester and pyruvate.

14. A method as claimed in claim 12 wherein the treatment step is an impregnating step.

15. A method as claimed in claim 12 wherein the treatment step is a coating step.

16. A method as claimed in claim 15 wherein the coating step is dipping, spraying, rolling or admixing.

17. A method as claimed in claim 12 wherein the cellulose derivative is selected from the group consisting of carboxymethyl cellulose, ethylmethyl cellulose, hydroxypropylethyl cellulose, methyl cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, hydroxymethylethyl cellulose and mixtures thereof.

18. A method as claimed in claim 17 wherein the cellulose derivative is carboxymethyl cellulose.

19. A method as claimed in claim 18 wherein the mixture of oligomers has an average molecular weight of less than about 15,000 daltons.

20. A method as claimed in claim 12 wherein the mixture of oligomers have molecular weight distribution such that the mixture has a polydispersity index of less than about two and the degradation product contains less than about 25% by weight of monosaccharides, disaccharides or mixtures thereof.

21. A method as claimed of claim 20 wherein the degradation product contains less than about 10% by weight of monosaccharides, disaccharides or mixtures thereof.

22. A method of increasing the dewatering properties of a paper product, comprising treating the paper product with a degradation product of a cellulose derivative comprising a mixture of oligomers of the cellulose derivative, a majority of said oligomers having a degree of polymerization between about 5 and about 50.

23. A method as claimed in claim 22 further comprising treating the paper with at least one additive selected from the group consisting of dyes, colorants, wet-strength agents and defoamers.

24. A method as claimed in claim 22 wherein in the treatment step, the cellulose derivative has at least one substituent selected from the group consisting of carboxymethyl, methyl, amino hydroxypropyl, methylethyl, hydroxyethyl, hydroxypropylethyl hydroxymethylethyl, hydroxypropylmethyl, sulfate, carboxylic acid, carboxylic acid ester and pyruvate.

25. A method as claimed in claim 22 wherein the treatment step comprises combining the mixture of oligomers with furnish.

26. A method as claimed in claim 22 wherein the paper product is selected from the group consisting of pulp, a finished paper, textile products and other cellulose based products.

27. A paper product treated with a degradation product of a cellulose derivative comprising a mixture of oligomers of the cellulose derivative the majority of which have a Mark-Houwink exponent of at least 1.2 at an NaCl concentration of about 0.005N to 0.5N.

28. A paper product as claimed in claim 27 wherein the celluose derivative has at least one substituent selected from the group consisting of carboxymethyl, methyl, hydroxypropyl, amino, methylethyl, hydroxyethyl, hydroxypropylethyl, hydroxymethylethyl, hydroxypropylmethyl, sulfate, carboxylic acid, carboxylic acid ester and pyruvate.

29. A paper product as claimed in claim 27 wherein the cellulose derivative is selected from a group consisting of carboxymethyl cellulose, methyl cellulose, hydroxypropyl cellulose hydroxypropylethyl cellulose, methyethyl cellulose, hydroxypropylmethyl cellulose, hydroxymethylethyl cellulose and mixtures thereof.

30. A paper product as claimed in claim 29 wherein the cellulose derivative is carboxymethyl cellulose.

31. A paper product as claimed in claim 30 wherein the mixture of oligomers has an average molecular weight of less than about 15,000 daltons.

32. A paper product as claimed in claim 27 wherein the mixture of oligomers have molecular weight distribution such that the mixture has a polydispersity index of less than about two and the degradation product contains less than about 25% by weight of monosaccharides, disaccharides or mixtures thereof.

33. A paper product as claimed of claim 32 wherein the degradation product contains less than about 10% by weight of monosaccharides, disaccharides or mixtures thereof.

34. A method of increasing the strength of paper comprising,

treating the paper with a degradation product of a cellulose derivative comprising a mixture of oligomers of the cellulose derivative, a majority of said oligomers having a Mark-Houwink exponent of at least 1.2 at an NaCl concentration of about 0.005N to about 0.5N.

35. A method as claimed in claim 34 further comprising treating the paper with at least one additional agent selected from the group consisting of dyes, colorants, wet strength agents and defoamers.

36. A method as claimed in claim 34 wherein the treatment step involves coating the paper by dipping, spraying, rolling or admixing.

37. In a method of paper manufacture having the steps of:

(a) pulping the fibers;

(b) refining the paper stock;

(c) forming the paper sheet;

(d) drying the paper sheet,

the improvement comprising treating the paper with a degradation product of a cellulose derivative comprising a mixture of oligomers of the cellulose derivative, a majority of the oligomers having a Mark-Houwink exponent of at least 1.2 at an NaCl concentration of about 0.005N to about 0.5N.

38. A method as claimed in claim 37 wherein in the treatment step the cellulose derivative has at least one substituent selected from the group consisting of carboxymethyl, methyl, amino, hydroxypropyl, methylethyl, hydroxyethyl, hydroxypropylethyl, hydroxymethylethyl, hydroxypropylmethyl, sulfate, carboxylic acid, carboxylic acid ester and pyruvate.

39. A method as claimed in claim 37 wherein the treatment step is an impregnating step.

40. A method as claimed in claim 37 wherein the treatment step is a coating step.

41. A method as claimed in claim 40 wherein the coating step is dipping, spraying, rolling or admixing.

42. A method as claimed in claim 37 wherein the mixture of oligomers have molecular weight distribution such that the mixture has a polydispersity index of less than about two and the degradation product contains less than about 25% by weight of monosaccharides, disaccharides or mixtures thereof.

43. A method as claimed in claim 42 wherein the degradation product contains less than about 10% by weight of monosaccharides, disaccharides or mixtures thereof.

44. A method as claimed in claim 37 wherein the cellulose derivative is carboxymethyl cellulose.

45. A paper product as claimed in claim 44 wherein the mixture of oligomers has an average molecular weight of less than about 15,000 daltons.

46. A method of increasing the dewatering properties of paper, comprising treating the paper with a degradation product of a cellulose derivative comprising a mixture of oligomers of the cellulose derivative, a majority of which have a Mark-Houwink exponent of at least 1.2 at an NaCl concentration of about 0.005N to about 0.5N.

47. A method as claimed in claim 46 further comprising treating the paper with at least one additive selected from the group consisting of dyes, colorants, wet-strength agents and defoamers.

48. A method as claimed in claim 46 wherein in the treatment step, the cellulose derivative has at least one substituent selected from the group consisting of carboxymethyl, methyl, amino, hydroxypropyl, methylethyl, hydroxyethyl, hydroxypropylethyl, hydroxymethylethyl, hydroxypropylmethyl, sulfate, carboxylic acid, carboxylic acid ester and pyruvate.

49. A method as claimed in claim 46 wherein the treatment step comprising combining the mixture of oligomers with furnish.

50. A method as claimed in claim 46 wherein the paper product is selected from the group consisting of pulp, a finished paper product, textile products and other cellulose based products.

51. A paper product treated with a degradation product of cellulose derivative comprising a mixture of oligomers of the cellulose derivative, the majority of which have a degree of polymerization in the range of about 5 to about 50 and a rod-like configuration.

52. A paper product as claimed in claim 51 wherein the cellulose has at least one substituent selected from the group consisting of carboxymethyl, methyl, hydroxypropyl, hydroxypropylethyl, amino, methylethyl, hydroxyethyl, hydroxymethylethyl, hydroxypropylmethyl, sulfate, carboxylic acid, carboxylic acid ester and pyruvate.

53. A paper product as claimed in claim 51 wherein the cellulose derivative is selected from the group consisting of carboxymethyl cellulose, methyl cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, methylethyl cellulose, hydroxypropylethyl cellulose, hydroxymethylethyl cellulose and mixtures thereof.

54. A paper product as claimed in claim 51 wherein the cellulose derivative is carboxymethyl cellulose.

55. A method of increasing the strength of paper comprising,

treating the paper with a degradation product of a cellulose derivative comprising a mixture of oligomers, the majority of which have a degree of polymerization in the range of about 5 to about 50 and a rod-like configuration.

56. A method as claimed in claim 55 further comprising treating the paper with at least one additional agent selected from the groups consisting of dyes, colorants, wet strength agents and defoamers.

57. A method as claimed in claim 55 wherein the treatment step involves coating the paper by dipping, spraying, rolling or admixing.

58. In a method of paper manufacture having the steps of:

(a) pulping the fibers;

(b) refining the paper stock;

(c) forming the paper sheet; and

(d) drying the paper sheet,

the improvement comprising treating the paper with a degradation product of a cellulose derivative comprising a mixture of oligomers, the majority of which have a degree of polymerization in the range of about 5 and about 50 and a rod-like configuration.

59. A method as claimed in claim 58 wherein in the treatment step the cellulose derivative has at least one substituent selected from the group consisting of carboxymethyl, methyl, amino, hydroxypropyl, methylethyl, hydroxyethyl, hydroxymethylethyl, hydroxypropylmethyl, hydroxypropylethyl, sulfate, carboxylic acid, carboxylic acid ester and pyruvate.

60. A method as claimed in claim 58 wherein the treatment step is an impregnating step.

61. A method as claimed in claim 58 wherein the treatment step is a coating step.

62. A method as claimed in claim 61 wherein the coating is dipping, spraying, rolling or admixing.

63. A method of increasing the dewatering properties of paper, comprising treating the paper with a degradation product of a cellulose derivative comprising a mixture of oligomers, the majority of which have a degree of polymerization in the range of about 5 and about 50 and a rod-like configuration.

64. A method as claimed in claim 63 further comprising treating the paper with at least one additive selected from a group consisting of dyes, colorants, wet-strength agents and defoamers.

65. A method as claimed in claim 63 wherein in the treatment step the cellulose derivative has at least one substituent selected from the group consisting of carboxymethyl, methyl, amino, hydroxypropyl, methylethyl, hydroxyethyl, hydroxymethylethyl, hydroxypropylmethyl, hydroxypropylethyl, sulfate, carboxylic acid, carboxylic acid ester and pyruvate.

66. A method as claimed in claim 63 wherein the treatment step further comprises combining the mixture of oligomers with furnish.

67. A method as claimed in claim 63 wherein the paper product is selected from the group consisting of pulp, a finished paper product, textile products, and other cellulose based products.