CS196654B1 - Filling of cigarette filters and method of making the same - Google Patents

Description

CZECHOSLOVAK SOCIALIST REPUBLIC (19) DESCRIPTION OF THE INVENTION FOR COPYRIGHT CERTIFICATE 196654 (11) (Bl) (51) Int. Cl? A 24 D 3/02 A 24 D 3/04 (22) Enrolled 25 11 7.6 (21) (PV 7612-76) (40) Published 31 07 70 OFFICE PROVIDED AND DISCOVERED (45) Published 15 07 81

Author of the invention ŠÍMO RUDOLF ing. CSc., SVIT, BACULÁK ŠTEFAN ing., POPRAD, KNOTEK

LUBOMÍR ing., SVIT, PECIAR JOZEF ing., LEOPOLDOV and NEŠČÁK ERVÍNing., NITRA (54) Content of eijiarel filters and sposol) production of this filling

BACKGROUND OF THE INVENTION The present invention relates to a cigarette filter cartridge for tobacco smoke, which addresses the problem of trapping gaseous, liquid, and solid effluents from the combustion of a tobacco portion of a cigarette, as well as a method for producing the same.

Previously known single component fiber cigarette filter cartridges are mainly made of viscose and cellulose acetate fiber bases. Known cigarette filters made from natural fibers, there are also filters from monocomponent polyethylene, polypropylene, and vinyl chloride.

Disadvantages of viscose-based fillings, especially in the large weight of the filter-filled, high resistance to gas flow, in the laborious manufacturing process in the deteriorated working environment, in the low degree of whiteness, in the need to use chemical preparation agents, as well as in the contents of various chemical residues components (residual sulfur).

Currently, cellulose acetate fiber is the most suitable cigarette filter material in the world, the drawback of which is the need to apply chemical preparation agents, as well as the fact that during the smoking process, the smoke is produced by contracting the volume of the filter and releasing it from the wall of the packaging, thereby reducing its filtration efficiency.

The disadvantage of monocomponent fibers of polypropylene or poly (propylene), respectively. of polyethylene is the large weight of the filter, the risk of fusing the fibers flat cut, thereby greatly increasing the resistance of the filter of the gas flow. as well as lower filtration efficiency against cellulose acetate filter.

The aforementioned drawbacks are solved by the filling of cigarette filters for tobacco smoke according to the invention, the essence of which is that the cigarette filter cartridge consists of a strand of polypropylene conjugated fibers, whose elementary fibers are micro-cracks on their surface, the number of beads weighing less than 5 on 1 cm and fineness in the range of 1 to 9 dtex.

The method of the invention is based on the spinning of polypropylene components which are separate, treated, distributed and then bonded through the nozzle orifices and drawn to form conjugated fibers. The components in the fiber are deposited in parallel, leading to continuous phases, with the center of gravity of the individual the components of the elementary fiber. The weight ratio of the components in the fiber may range from 1: 3 to 3: 1.

The pulled fibers are left to stand and stand! are pooled and cut at least twice, the resulting strand being composed of at least 2000 conjugated strands. The stretching is carried out at temperatures of 15 to 70 ° C and thermal stabilization at 198851

Claims (2)

temperatures from 100 to 140 ° C. The filters of the desired length are cut from the strand, after being wrapped in paper. The starting polypropylene polymers used have a logarithmic viscosity number - LVČ determined according to ČSN 64 1131 in the range of 100 to 200 ml.g-1, where at least one input polymer contains a high molecular weight fraction with LVC> 400 ml. g-1 in an amount of 5 to 20%. The processing of the polymers is carried out in the range of from 250 to 300 ° C so that the polymeric components of the spinning nozzle are small in 40 ml. g '1, the fiber component of the lower LVC must be above 60 ml. g "1 and the content of high molecular weight fraction of at least one component with LVC> 400 ml g-1 must be in the range of 3 to 15%. The size of the LVC differences between the components is adjusted depending on the desired curvature of the resulting fibers. the process of processing on the stranded conjugated polypropylene fibers is achieved that the individual conjugated fibers are encapsulated, have micro-cracks on their surface, a high degree of whiteness without the use of matting or bleaching agents, their surface in the strand and the filling of the cigarette filters by such strand does not impose gas transfer The resistance of the conjugated fibers to the surface of the tobacco part is different from that of the cigarette, such as the letter Y shape. polydisperse curves obtained by chromatographic fractionation consisting of the stepwise extraction of the ipolymer film on the inert solvent mixture of the solvent vapor and the precipitant, decaline and 1-naphthylamine as the solvent. Acetone was used to quantitate the polymer from the eluate. The determination of the isolated fractions was carried out in a SN 64 641 case. Example 1 Polypropylene polymer with a LVI of 156 ml. g-1 with 9% 10% fraction of LVC >> 400 ml. g-1 was melted in one extruder at a temperature of 260 ° C and in a second extruder at 320 ° C. g 1: 1. The difference in the LVC of the components on the spinneret was 25 ml. g1, wherein the LVC of the component melted at 260 ° C was 121 ml. g-1 and the fraction content of LVC> 400 mlg -1 of the component melted at 320 ° C was 4%. The fibers were pulled at a speed of 650 m / min, below the PREF ET nozzle A citaret filter cartridge comprising 5 to 25 mm long stranded, polypropylene conjugated fibers having micro-cracks on their surface, a number of arcs greater than 6 per inch, with fineness of strands being from 2 to 8 dtex. cooled and, after standing for 16 hours, increased in price and cut in one step to a deformation ratio of 3.2 without heating. The draw rate was 150 m / min. A strand containing 6400 single strands was subjected to a 0.25 MPa water treatment on a 2.5 m path at a speed of 80 m / min. The individual filaments had a density of 4.8 dtex and a number of arches of 13 cm-1, and had tears on their surface. The strand was wrapped in paper and cut into 15 mm filters. Example 2 Polypropylene polymer with LVC 151.7 ml. g-1 containing 10% fraction with LVC> 400 ml. g_1 melted in a single extruder at 260 ° C in the second at 320 ° C, while the components were attached to the nozzle at 260 ° C. The component dosing ratio was 1: 1.5. The difference in the LVC of the spinneret was 21 ml. g-1, while the LV component melted at 260 ° C was 116 ml. g-1 with a fraction of LVC> 400 ml. Fibers were pulled at 400 m / min, pooled for 24 hours and pooled at 40 ° C at a rate of 250 m / min at a deformation ratio of 3.5. A stranded strand containing 5600 individual conjugated fibers subjected to steam thermal treatment at 130 ° C on a 2.5 m path at a continuous speed of 60 m / min. The individual fibers had a fineness of 6 dtex, a number of 9 cm-1 curves, and had microcracks on their surface. The strand was wrapped in paper and cut into 10 mm filters. EXAMPLE 3 Two polypropylene polymers of different chemical and physical properties were used for spinning. First polymer with LVČ 184ml.g_1 containing 15% fraction with LVC> 400 ml. g-1, was melted in a single extruder at 280 ° C. A second polymer with a LW of 150 ml. g-1a containing 8% fraction with LVC> 400 ml. g-1 in a second extruder at 260 ° C. The difference in ingredients per nozzle was 33 ml. g-1, wherein the LV of the lower LVC was 118 ml. g-1a content of high molecular weight fraction with LVC >> 400 ml. g-1 was 7.5% for the melted component at 280 ° C. The fiber was drawn off at 800 m / min. After standing for 24 hours, the fibers were pooled and cut at 60 ° C at 180 m / min to a deformation ratio of 2.8. The strand, which contained 7200 strands, was heat treated as in Example 2. The individual strand strands after heat treatment had a fineness of 3.3 dtex, the number of strands 15 per 1 cm. The strand was wrapped in paper and cut as in Example 2. THE INVENTION 2. A method for producing a cigarette filter cartridge according to item 1 by spinning at least one type of polypropylene of different physicochemical properties in two streams, which as two-polymer components are separately melted, treated, distributed and then bonded through openings of a spinneret and pulled to form kneaded fibers. the center of gravity of the individual constituents compared to the center of gravity of the elemental conjugated fiber in cross-section with the weight ratio of the components in the range of 1: 3 to 3: 1, the fibers obtained are left to stand, pooled, cut and heat treated, characterized by in that the spinning two polymeric components have a logarithmic viscosity number of from 100 to 200 ml. with the proviso that at least one polymer component prior to melting contains a high molecular weight fraction with a logarithmic viscosity number above 400 ml. g-1 in an amount of 5 to 20% by weight, by thermally treating the temperature of 250 to 350 ° C, the viscosity number is adjusted to limit the polymeric components of the spinneret to differentiate the viscosity numbers from 0 to 40 ml. with the proviso that the viscosity limit number of the lower viscosity viscosity component is at least 60 ml. g_1 and the at least one polymer component in the resulting fiber comprise a high molecular weight fraction with a viscosity limit of at least 400 ml. g-1 in an amount of from 3 to 15% by weight, the conjugated fiber filaments then at least 2000 elemental conjugated fibers at least double at a temperature of 17 to 70 ° C, heat-stabilize at temperatures of 100 to 140 ° C, and from a strand packed to the paper is cut through the filter of the desired length.