Method for evaluating longitudinal surface area of strand and application thereof
A surface area and tow technology, which is applied in the field of longitudinal surface area evaluation of tow, can solve the problems of not being able to objectively reflect the actual situation of the effect of tow smoke, and cannot describe and comprehensively describe the actual application performance of tow
Active Publication Date: 2012-09-26
CHONGQING CHINA TOBACCO IND CO LTD +1
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Problems solved by technology
[0002] At present, the physical properties of tow are described by measuring single physical performance indicators such as single filament linear density, total line density, crimp number, tow crimp index, elastic recovery rate of tow crimp, breaking strength, cross-sectional shape and radial irregularity. Yes, these single physical performance indicators describe the performance of the tow to a certain extent and from a certain aspect, but it is difficult to fully and comprehensively describe the actual application performance of the tow, and cannot describe the longitudinal effect on the smoke when the cigarette is smoked. The outer surface area of the tow
[0003] At present, there is no measurement method that can directly measure the surface area of the longitudinal action of the tow, which is usually estimated by measuring the volume of the tow filter rod, that is, calculated by measuring the bottom area and length of the formed filter rod, this measurement The method can obtain the actual volume of the filter rod, but it cannot be related to many performance parameters that reflect the performance of the tow, let alone objectively reflect the actual situation of the effect of the tow on the flue gas in the filter rod
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[0025] The procedure for evaluating the longitudinal surface area of tow is as follows: figure 1 shown. The method of the present invention is specifically described below by taking a unitary filter rod rolled by an R-shaped tow as an example, but the scope of protection of the present invention is not limited to the following examples, but should be based on the scope of claims.
[0026] Step (1): Establish a surface area model including all parameters affecting the longitudinal interaction surface area of filter rod tow.
[0027] For R-type tow filter rods with a certain structure, the variables that affect the longitudinal surface area are: tow cross-sectional radius a, tow density ρ, tow length l, curl degree j, number n, filter rod length L, single filament linear density d, the bus density z, so the longitudinal surface area S 纵 can be expressed as a function of these variables, namely
[0028] S 纵 = f(a, ρ, l, j, n, L, d, z),
[0029] Among them, a and ρ are co...
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The invention discloses a method for evaluating the longitudinal surface area of a strand. The method is based on the formula shown in the specifications. When the length of a filter stick and the crimpness of the strand are fixed, the formula is corrected to obtain greater I value, and the reflected longitudinal acting surface area of the strand is larger. The invention also provides application of the method, namely that the equivalent description index of the longitudinal surface area of the strand is used for guiding the strand. Compared with the prior art, the method disclosed by the invention is associated with multiple physical performance parameters of the strand, and avoids the shortcoming that the existing method can not be associated with the physical performance parameters of the strand; the method takes full consideration of the practical application status of the strand in the filter stick, and effectively describes the comprehensive performance of the strand in practical use; and the existing measurement method only can perform estimation by measuring the volume of the filter stick, and by adopting the method disclosed by the invention, the longitudinal acting surface area of different types of strands in any crimped status can be obtained.
Description
technical field [0001] The invention relates to a method for evaluating the longitudinal surface area of a tow based on multiple physical parameters of the tow and the actual application state of the tow, and belongs to the technical field of tow filter rod production. Background technique [0002] At present, the physical properties of tow are described by measuring single physical performance indicators such as single filament linear density, total line density, crimp number, tow crimp index, elastic recovery rate of tow crimp, breaking strength, cross-sectional shape and radial irregularity. Yes, these single physical performance indicators describe the performance of the tow to a certain extent and from a certain aspect, but it is difficult to fully and comprehensively describe the actual application performance of the tow, and cannot describe the longitudinal effect on the smoke when the cigarette is smoked. The outer surface area of the tow. [0003] At present, t...
Claims
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IPC IPC(8): G01B21/28
Inventor 汪长国周学政杨文敏戴亚冯广林刘林邓永
Owner CHONGQING CHINA TOBACCO IND CO LTD