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Filtering tip material made of porous foam for cigarettes and preparation method thereof

A technology for porous foaming and cigarette use, which is applied in the direction of e-liquid filter, application, tobacco, etc., can solve the problems of uneven pores of foamed materials, high melting temperature, and it is difficult to apply the material to filter rods. The process is simple and the application prospect is broad.

Inactive Publication Date: 2014-05-07
NANTONG CIGARETTE FILTER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current foaming and melting temperature of supercritical carbon dioxide is high, which easily leads to uneven pores of the foamed material, and it is difficult to apply the foamed material in the filter rod.

Method used

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  • Filtering tip material made of porous foam for cigarettes and preparation method thereof
  • Filtering tip material made of porous foam for cigarettes and preparation method thereof
  • Filtering tip material made of porous foam for cigarettes and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] The porous foam cigarette filter material of the present invention is prepared by supercritical fluid foaming and melting extrusion, such as figure 1 Shown, the preparation method of porous foam cigarette filter material of the present invention comprises the steps:

[0022] 1) Put 70-88 parts by weight of cellulose acetate sheet, 1-10 parts by weight of polylactic acid, 6-25 parts by weight of plasticizer and 0.1-0.5 parts by weight of titanium dioxide into a dryer and dry until the moisture content is lower than 0.5 %, and then put it into a high-speed mixer and mix it thoroughly for 6-10 minutes. Wherein the raw material cellulose acetate sheet substitution degree is 2.0~2.7;

[0023] 2) Put the mixed material into the supercritical fluid foaming extruder, which includes the upper stage extruder, gas injection section, lower stage extruder and extruder head connected in sequence . The mixture first enters the upper-stage extruder, kneads and extrudes at a process ...

Embodiment 1～5

[0026] The cellulose acetate sheet, polylactic acid, titanium dioxide and plasticizer (triacetin, triethylene glycol diacetate, citric acid ester) according to the weight parts in Table 1 are mixed and extruded according to the above method, and the process parameters are shown in Table 1. Then, the cigarette filter rods with a length of 120 mm were obtained by sizing and cutting the formed bongs with different inner diameters. 20 filter rods were randomly selected to test the circumference, weight, roundness, opening ratio, cell density, and cell density. For pore size, suction resistance and hardness, the detection methods refer to relevant national standards, and the specific physical indicators are shown in Table 1.

[0027] Table 1

[0028]

[0029]

Embodiment 6～10

[0031] The filter sticks and shredded tobacco rolls made in Examples 1 to 5 are used to make sample cigarettes, and 50 cigarettes of each sample obtained are smoked at random, and the number of puffs of each cigarette is measured and averaged, and the smoke is measured. The tar content and total particulate matter in the final flue gas. The tar content and total particulate matter were determined according to GB / T19609-2004 "Determination of total particulate matter and tar by smoking machine for routine analysis of cigarettes". Cigarettes made of ordinary filter rods with the same circumference, draw resistance and length were used for comparative experiments, and the results are shown in Table 2.

[0032] Table 2

[0033] cigarette

[0034] Example 5

[0035] As can be seen from the above examples, the cigarette filter tip made of the foam material produced by the method for preparing the porous foam cigarette filter tip material of the present invention...

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Abstract

The invention discloses a filtering tip material made of porous foam for cigarettes and a preparation method thereof. The filtering tip material comprises the following components in parts by weight: 70-88 parts of cellulose acetate sheet, 1-10 parts of polylactic acid and 6-25 parts of plasticizing agent. The cellulose acetate sheet can be directly treated by a mode of foaming, melting and extruding the supercritical fluid to obtain a fixed-shape and fixed-diameter filtering rod made of foam for cigarettes. Compared with the common filtering tip, the performance for adsorbing harmful substances is very close, even slightly higher than that of the common cigarette filtering tip, and can meet the performance index of the cigarette filtering tip completely. The filtering tip material disclosed by the invention has the advantages that the technological process is simple, the procedure becomes shorter, the used supercritical fluid has no any pollution to the environment and as an entirely-new form of the filtering rod, the application prospect is wide.

Description

technical field [0001] The invention relates to a foam material and a preparation method thereof, in particular to a porous foam cigarette filter material and a preparation method thereof. Background technique [0002] The filter rods for cigarettes widely used in the market are mainly obtained by opening cellulose diacetate tow, applying plasticizer, feeding, rolling and cutting, and cellulose acetate tow is made of Cellulose diacetate sheets are obtained through complex processes such as dissolving, filtering and defoaming, spinning, crimping, and drying. In the production process, it takes a lot of time to completely dissolve cellulose diacetate sheets in acetone; the acetone used is flammable and explosive, and needs to be recycled; flying flowers will be generated during the production of tow and opening of tow, which is harmful to the operator. There are certain occupational safety risks. In addition, there are many problems in the whole production process, such as n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/12C08L67/04C08K5/103C08K5/11C08K3/22C08J9/12A24D3/10A24D3/14
Inventor 杜互助盛培秀唐荣成金强王明辉
Owner NANTONG CIGARETTE FILTER
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