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Cellulose derivatives

A technology of cellulose derivatives and regenerated cellulose, applied in the field of tobacco filters, can solve the problems of pollution, do not reduce the aroma of smoking, and achieve high biodegradability, excellent wet decomposition ability, excellent smoking quality and high biodegradation effect of ability

Inactive Publication Date: 2004-03-17
DAICEL CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Therefore, the object of the present invention is to provide a tobacco filter material which does not reduce the aroma, taste and palatability of smoking, has high biodegradability and thus solves the problem of pollution and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0146] 10g of bleached softwood kraft pulp with a Canadian standard firmness value of 270ml is soaked into cellulose acetate containing 0.15% by weight (the degree of acetylation is 55.5%, the average degree of substitution is 2.45, and the molar ratio of residual calcium to residual sulfuric acid is 1.2, the average degree of polymerization is 370) in the 500ml acetone solution of 370) for 15 seconds, and stirred, wherein the slurry is cracked with water, replaced with acetone, and stirred for 15 seconds to obtain. The impregnated slurry was taken out and dried in the air to obtain coated fibers coated with cellulose acetate on the surface. In the coated fibers, the coating amount of cellulose acetate accounted for 5.0% by weight of the total coated fibers. The resulting coated fibers were uniformly dispersed in 50 liters of water, and using the resulting slurry, weaved into a web using conventional wet weaving techniques. The net is dewatered and dried to obtain a sheet wei...

Embodiment 2

[0147] 10g is cracked with water, then placed in acetone, and the bleached softwood grafted pulp with a Canadian standard firmness value of 270ml obtained by filtering to remove the solvent is added to cellulose acetate containing 3% by weight under stirring. (The degree of acetylation is 55.5%, the average degree of substitution is 2.45, the molar ratio of residual calcium to residual sulfuric acid is 1.2, and the average degree of polymerization is 370) in 400ml of acetone solution. The resulting mixture was placed in a water bath and stirred well with a stirrer, and thus, the cellulose acetate aggregated or solidified. The resultant was dried in air to obtain a coated fiber whose surface was coated with cellulose acetate. Use gained fiber, apply traditional technology to operate weaving net equally by embodiment 1, and dehydration drying obtains weight is 34.1g / m 2 of flakes. As a result of measuring disintegration and biodegradability, it was proved that the sheet was 63...

Embodiment 3

[0149] Repeat the operation process of embodiment 2, just will use the acetone solution coating that contains 5.0% by weight of cellulose acetate, obtain the coated fiber that the coating amount of cellulose acetate is 9.7% by weight. Use the coated fiber that obtains like this, obtain weight by embodiment 1 operation and be 34.6g / m 2 of flakes. The decomposability and biodegradability of this sheet were measured, and the results showed that the water disintegration of the sheet was 60.2%, the degradation rate measured by the active mud method was 59%, and the remaining rate measured by the enzymatic degradation method was 72.1%.

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Abstract

A tobacco filter material comprises a fiber or particle having a core and a surface layer surrounding said core, wherein the surface layer comprises a cellulose ester and the core comprises a non-esterified cellulose. The fiber or particle may be (A) a coated cellulose fiber or particle coated with a cellulose ester e.g. cellulose acetate on the surface of fiber or particle or (B) a fibrous or particulate cellulose derivative derived from a naturally-occurring or regenerated cellulose and having an average substitution degree of not more than 1.5. As the cellulose fiber or particle, wood pulp etc. is used, and the amount of the cellulose ester in the coated cellulose (A) is e.g. 0.1% by weight or more. The cellulose derivative (B) in which the surface layer is esterified with an organic acid e.g. acetic acid, comprises a non-esterified portion in the core. Such cellulose derivative may for example be obtained by treating a cellulose fiber or particle with an organic acid and organic acid anhydride or organic acid halide in a liquid phase in the absence of a catalyst.

Description

[0001] This application is a divisional application of the parent application whose application number is CN95118621.3. The filing date of the parent case was September 22, 1995; the title of the invention was "A Tobacco Filter Material and Its Production Method". technical field [0002] The present invention relates to a tobacco filter material having satisfactory biodegradability, wet decomposition ability or other characteristics, a method of producing the tobacco filter material, and a method for ensuring good aroma and palatability of tobacco when using the filter material sex tobacco filters. Background technique [0003] As a kind of tobacco filter tip with effective removal of harmful components such as tar in tobacco, and can guarantee satisfactory smoking quality, known filter plug is obtained by making a kind of cellulose acetate (for example, a kind of acetic acid with an average degree of substitution of about 2.4) Cellulose) fibers and a plasticizer such as t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A24D3/10
CPCA24D3/068A24D3/065A24D3/10Y10T428/2938Y10T428/2965Y10T428/2933
Inventor 浅井种美岛本周松村裕之柴田彻
Owner DAICEL CHEM IND LTD
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