JPS6360991B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method of manufacturing a tobacco filter plug. More specifically, a sheet-like pulp is pulverized by a pulverizer, and the pulverized pulp is uniformly added onto a uniformly opened tow-like fiber bundle to which a plasticizer or adhesive is evenly applied, and then the sheet-like pulp is pulverized by a grooved thermoforming roll. (hereinafter referred to as a corrugate thermoforming device) to form a corrugated sheet and then winding it around a tobacco filter to form a rod-shaped tobacco filter plug. . In recent years, the problem of health problems caused by smoking cigarettes has become a major social issue. It is desired to develop a new high-performance tobacco filter plug to obtain tobacco with good aroma and taste. One type of cigarette filter plug that has been developed in the past that has a good ability to remove harmful components contained in cigarette smoke is one that has an increased amount of fiber filled in each filter plug. However, the suction resistance tends to be significantly large, making it difficult to use as a practical tobacco filter plug. Other tobacco filter plugs are filled with fibers in which the specific surface area is increased by reducing the fineness of the single fibers in the plug or by making the fibers into irregular cross-sections. Although there is a tendency for the removal performance per unit of suction resistance to improve, the degree of improvement is small, and on the other hand, the hardness required for the tobacco filter decreases and the cost increases. On the other hand, tobacco filter plugs made of dry non-woven fabric made from natural cellulose fibers made by crushing wood pulp, etc., or made of bulky crepe paper, have high removal performance per suction resistance, but have a poor flavor. Tend. As a result of intensive studies in view of the above circumstances, the inventors of the present invention found that after uniformly opening a tow-like fiber bundle and uniformly applying a plasticizer or adhesive, the fibers were crushed while pulverizing a sheet-like pulp. After that, it is molded into a corrugated sheet using a corrugating thermoforming device, and then rolled up into a rod-shaped tobacco filter plug using the usual method of rolling up a tobacco filter.
The filter used as a tobacco filter has high performance in removing particulate matter such as tar and nicotine, and does not require excessive suction force from the smoker.
Furthermore, the present invention was completed by discovering that the aroma and taste when smoking is extremely good. The present invention involves adding pulverized pulp mainly composed of cellulose to a uniformly opened tow-like fiber bundle, and forming it into a corrugated sheet using a corrugating thermoforming device.
The method of manufacturing a cigarette filter plug is made by converging it into a circular rod shape. The tow-like fiber bundle used in carrying out the present invention may be a variety of tows such as regenerated cellulose fibers or polypropylene, but in particular, when tow made from cellulose diacetate is used, it can be It is possible to obtain a tobacco filter that has high substance removal performance, appropriate suction resistance, and good flavor. Hereinafter, the manufacturing method of the present invention will be explained with reference to the drawings. FIG. 1 is a conceptual diagram of a manufacturing method preferably used in the present invention. Usually the tow-like fiber bundle is veil 1
used in the following conditions. The tow-like fiber bundle 2 pulled out from the bale 1 is uniformly opened by a pneumatic opening device 10 and a mechanical opening device 12. A plasticizer or adhesive is supplied to the uniformly opened tow-like fiber bundle from the plasticizer or adhesive supplying device 13 so that the plasticizer or adhesive is uniformly attached to the tow-like fiber bundle. The sheet-like pulp 4 is supplied in the form of a roll or a sheet. The sheet-like pulp 4 fed in a fixed amount by the feed roller 16 is crushed into chips 6 by the crusher 17, and uniformly defibrated by the crusher 18, and is uniformly opened to which the plasticizer or adhesive is evenly attached. The fibers fall onto the tow-like fiber bundles. Crushing machine 17 and crushing machine 18
The exhaust fan 23 is used to release the generated heat, make it easier for the defibrated pulp fibers to fall onto the tow-like fiber bundle, and reduce pulp dust leaking into the work chamber.
Therefore, it is preferable to maintain the receiving box 20 at a negative pressure and remove the pulp dust with the dust collector 22. The defibrated pulp fibers deposited in a sheet on the uniformly opened tow-like fiber bundle are molded into a corrugated sheet 3' in a corrugated thermoforming device 14. The corrugate thermoforming device 14 has a large number of grooves around the periphery, the upper and lower grooves mesh with each other, and can be adjusted to a clearance of about 1 mm or less, and can be thermoformed at a predetermined pressure and temperature. Good to have,
A device such as that shown in USP 3804695 can be used. The corrugated sheet 3' is pulled out from the corrugated thermoforming device 14 by a pull-out roller 15,
After being focused into a circular rod shape by the focusing guide 9, the plug machine 24 winds up the tobacco into a rod-shaped tobacco filter plug. FIG. 2 shows a cross section of the corrugated sheet 3', in which reference numeral a indicates a tow-like fiber bundle portion and reference numeral b indicates a pulp fiber portion. In the manufacturing method of the present invention, the amount of plasticizer or adhesive attached to the tow-like fiber bundle, the ratio of tow-like fibers and pulp-like fibers, and the corrugate thermoforming apparatus 1
The clearance between the rolls 4, the pressure and temperature, the groove pitch P of the corrugated sheet 3' and its depth t greatly influence the characteristics of the obtained tobacco filter. When cellulose acetate tow is used as the tow-like fiber bundle, triacetin is used as the plasticizer, and softwood pulp is used as the sheet-like pulp, the amount of triacetin is 2% relative to the cellulose diacetate tow.
It is preferable that the clearance between the rolls of the corrugated thermoforming device is 0.5 mm or less, the pressure between the rolls is in the range of 0.5 to 6 Kg/cm ² G, and the temperature is in the range of 60 to 180°C. The groove pitch P of the corrugated sheet is preferably in the range of 0.5 to 3 mm, and the groove depth t of the corrugated sheet is 0.2 to 3 mm.
A range of 2 mm is preferred. If the amount of triacetin is less than 2% based on the cellulose diacetate tow, or if the clearance between the rolls of the corrugated thermoforming device exceeds 0.5 mm, or if the pressure between the rolls is less than 0.5 Kg/cm ² G, the temperature If the temperature is less than 60℃, it is difficult to form into a sheet, and the suction resistance when made into a tobacco filter tends to be too large, and if the amount of triacetin exceeds 20% of the cellulose diacetate tow. Or, if the temperature of the corrugated thermoforming device exceeds 180°C, it is preferable because the formation of sheets will progress too much and it will be difficult to maintain sufficient suction resistance, production stability will deteriorate, and as a result, removal performance will decrease. do not have.
In addition, the groove pitch P of the corrugated sheet is 0.5 to 3.
If the groove depth t is outside the range of 0.2 to 2 mm, the moldability into a sheet and the convergence into a circular rod shape will deteriorate, which is not preferable. Hereinafter, the present invention will be explained in more detail with reference to Examples. The method for measuring each measurement item in the examples is as follows. Suction resistance The ventilation resistance when the flow rate of passing air was 17.5 ml/sec was displayed using the scale of a water column meter. TPM, tar, and nicotine removal rate Attach one end of the filter tip to a commercially available cigarette using cellophane tape, and burn the cigarette using a constant flow automatic smoking machine at a flow rate of 17.5 ml/sec, smoking time of 2 seconds, and a smoking interval of 58 seconds. Automatic smoking was performed with a length of 50 mm, and the mainstream smoke was collected using a Cambridge filter. TPM, tar, and nicotine collected on the filter tip and Cambridge filter were analyzed to determine their respective removal rates. Flavor and Flavor The flavor was evaluated on a three-point scale, with "3" indicating the best flavor and "1" indicating the poorest flavor, and expressed as the average value of 10 judges. Example A cellulose diacetate tow with a single fiber thickness of 4 deniers, a Y-shaped cross-sectional shape, and a total denier of 43,000 deniers was used as the tow-like fiber bundle. Sample No. 1 is shown in Table 1 as a tobacco filter plug rolled up by the manufacturing method of the present invention with a circumference of 24.7 mm and a length of 102 mm using the softwood pulp of . The plasticizer used was triacetin, which was applied at 6% to the cellulose diacetate tow using a transfer roller method.The ratio of cellulose diacetate fibers to pulp fibers was 57:43, and the clearance between the rolls of the corrugated thermoforming machine was
0.15mm, pressure between rolls is 3Kg/cm ² G, temperature is
The temperature was 14.5℃. The groove pitch of the corrugated sheet at this time was 1.0 mm, and the groove depth was 0.5 mm. In addition, as a comparative example, Sample No. 2 was prepared by winding up the same circumference and length from the same cellulose diacetate tow, and the same paper was wound from bulky crepe paper made only from the same softwood pulp. Sample No. 3, which was wound to the same circumference and length, is also shown in Table 1.

[Table] Next, check the length of these cigarette filter plugs.
A 17 mm filter tip was cut, and this was connected to a commercially available ``Highlight'' cigarette with the filter tip removed, and the TPM, tar, and nicotine removal rates were measured, and the aroma and flavor were evaluated. The results are shown in Table 2.

【table】 [Brief explanation of drawings]

FIG. 1 is a schematic process diagram showing a manufacturing method preferably used in the present invention, and FIG. 2 is an enlarged cross-sectional view of a corrugated sheet formed in an intermediate step of the present invention.

Claims (1)

[Scope of Claims] 1. A fiber sheet-like product in which a tow-like fiber bundle is uniformly opened and a plasticizer or adhesive is uniformly applied, and a pulverized pulp is supplied to at least one side of the fiber sheet-like product, which is processed using a grooved thermoforming roll. , molded into a corrugated sheet,
A novel method for manufacturing a high-performance tobacco filter plug, which comprises: then rolling up the tobacco filter plug. 2. The tow-like fiber bundle is a crimped acetate tow,
Claim 1 in which the plasticizer is triacetin
A method for producing a novel high-performance cigarette filter plug as described in Section 1. 3. The method for manufacturing a novel tobacco filter plug according to claim 1, characterized in that the pulverized pulp is pulverized sheet pulp.