Method for preparing cigarette filter of cellulose acetate fibers专利检索-醋酸丁酸纤维素油漆与涂料专利检索查询-专利查询网

Method for preparing cigarette filter of cellulose acetate fibers

阅读：445发布：2021-12-30

专利汇可以提供Method for preparing cigarette filter of cellulose acetate fibers专利检索，专利查询，专利分析的服务。并且A method for preparing a cigarette filter of cullulose acetate fibers is provided, which is characterized by blooming a tow composed of cellulose acetate fibers, adding to the bloomed tow 1 to 20% by weight (based on the cellulose acetate fibers) of a plasticizer comprising as an ingredient at least one member selected from diacetate, dipropionate and dibutyrate esters of 1,3-butylene glycol, and gathering the thus treated bloomed tow.，下面是Method for preparing cigarette filter of cellulose acetate fibers专利的具体信息内容。

权利要求

1. A METHOD FOR PREPARING A CIGARETTE FILTER OF CELLULOSE ACETATE FIBRES WHICH COMPRISES BLOOMING A TOW COMPOSED OF CELLULOSE ACETATE FIBERS, DISTURBING UNIFORMLY THROUGHOUT THE BLOOMED TOW FROM 1 TO 20% BY WEIGHT, BASED ON THE CELLULOSE ACETATE FIBERS, OF A PLASTICIZER COMPRISING AS AN INGREDIENT AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF THE DIACETATE, DIPROPIONATE AND DIBUTYRATE ESTERS OF 1,3-BUTYLENE GLYCOL, AND GATHERING THE THUS-TREATED BLOOMED TOW TO FORM A FILTER.

2. A method according to claim 1, in which the plasticizer is added in an amount of 3 to 10% by weight based on the cellulose acetate fibers.

3. A method according to claim 1, in which the cellulose acetate fiber tow is obtained by gathering 5,000 to 100,000 continuous fibers having a size of 1 to 16 deniers.

4. A method according to claim 3, in which the tow has 10 to 30 uniform crimps per 25 mm of the tow length.

5. A method according to claim 1, wherein said plasticizer consists essentially of said ingredient.

6. A method according to claim 1, wherein said plasticizer contains at least 50% by weight of said ingredient.

7. A method according to claim 6, wherein the remainder of said plasticizer is a substance selected from the group consisting of triacetin and the diacetate, dipropionate and dibutyrate esters of polyethylene glycol.

8. A method according to claim 1, in which the filter is cured at room temperature and the amount of said ingredient applied to the fibers is effective to impart to the filter a hardness of less than 10 units after curing at room temperaturE for one hour, wherein hardness is measured by imposing a load of 300 g onto the filter by means of a disc having a diameter of 12 mm for 10 seconds and measuring the depth of the indentation thereby formed in the filter and wherein one hardness unit is equal to 0.1 millimeter of the depth of the indentation.

9. A tobacco smoke filter comprising a bundle of substantially longitudinally extending cellulose acetate fibers having a size of from 1 to 16 denier per fiber, said fibers being substantially uniformly coated with from 1 to 20% by weight, based on the weight of the fibers, of a plasticizer of at least one member selected from the group consisting of the diacetate, dipropionate and dibutyrate esters of 1,3-butylene glycol.

10. A tobacco smoke filter according to claim 9, in which the amount of plasticizer is from 3 to 10% by weight, based on the weight of the cellulose acetate fibers.

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Method for preparing cigarette filter of cellulose acetate fibers

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