CN204812020U - Composite filter who contains porous carboxymethyl cellulose microballon - Google Patents

Abstract

A composite filter tip containing porous carboxymethylcellulose microspheres, which is composed of a filter element and an inner wrapping layer and an outer wrapping layer wrapped on the filter element, and is characterized in that: the filter element is a composite filter element, which is sequentially composed of ordinary cellulose acetate segments , porous carboxymethyl cellulose microsphere composite segment and ordinary cellulose acetate segment are connected, wherein the porous carboxymethyl cellulose microsphere composite segment is composed of the inner porous carboxymethyl cellulose microsphere gathering core and the outer dense Composition of acetate covering. Compared with the prior art, the utility model has the biggest feature of adding porous carboxymethyl cellulose microspheres in the filter tip and using a dense acetate fiber layer on the outer layer of the composite section to reduce the release of hydrogen cyanide in cigarette smoke more than 30%, and has no obvious effect on the tar content and sensory quality of cigarettes.

Description

Composite filter containing porous carboxymethylcellulose microspheres

technical field

The utility model relates to a filter tip used for making cigarettes, in particular to a composite filter tip containing porous carboxymethyl cellulose microspheres, which can reduce the release of hydrogen cyanide in mainstream smoke of cigarettes.

Background technique

At present, most cigarette filters are single cellulose acetate filters, which have a certain effect on reducing harmful substances in cigarette smoke. With the increasing attention to smoking and health issues, countries around the world are paying more and more attention to the development of cigarette filter materials and filters, and some functional materials have been added to filter rods to achieve the purpose of reducing certain components in smoke. . For example, patent CN101396170 discloses a composite cigarette filter made of modified adsorption material particles, which can improve the smoking quality of cigarettes and remove some harmful components. Patent CN201108028 adds amine-based materials prepared by surfactants to cellulose acetate to obtain binary composite filters, which can selectively reduce harmful volatile carbonyl compounds in cigarette smoke. In patents CN200920223706.9 and CN201120211899, porous hydroxyapatite and metal complex materials modified by trimethylaminoacethydrazide chloride were added to acetate fibers to obtain binary composite filters, which can selectively reduce cyanide in mainstream cigarette smoke. Hydrogen released. But usually above-mentioned technology has certain influence to cigarette smoking taste and tar amount.

Contents of the invention

The purpose of this utility model is to develop a composite filter containing porous carboxymethyl cellulose microspheres based on the above situation. It achieves the reduction of mainstream smoke by adding porous carboxymethyl cellulose microspheres in the filter At the same time, a dense acetate layer is used on the outer layer of the composite section, so that the mainstream smoke is preferentially in contact with the porous carboxymethyl cellulose microspheres in the composite section, thereby being able to absorb the hydrogen cyanide in the smoke. Hydrogen cyanide, reducing the amount of hydrogen cyanide released in mainstream cigarette smoke by more than 30%.

The purpose of this utility model is achieved through the following technical solutions:

A composite filter tip containing porous carboxymethyl cellulose microspheres, which is composed of a filter element and an inner wrapping layer and an outer wrapping layer wrapped on the filter element. It is formed by connecting the cellulose-based microsphere composite segment and the ordinary acetate fiber segment. Wherein: the composite segment of porous carboxymethyl cellulose microspheres is composed of a gathering core of porous carboxymethyl cellulose microspheres inside and a dense acetate fiber coating layer outside.

The apparent density of the ordinary acetate fiber segment is 20-40 g/dm ³ , and the apparent density of the dense acetate fiber coating layer is 40-100 g/dm ³ .

The porous carboxymethyl cellulose microspheres (the preparation method of this product has been authorized, the patent number is 201310647378.6) are formed by the complexation of carboxymethyl cellulose and polyvalent metal salts, with a particle size of 100 microns to 4000 microns. BET specific surface area is 10-200m2/g. The specific preparation method is as follows:

(1) Drop the carboxymethyl cellulose aqueous solution with a concentration of 0.5-4.0% and a viscosity of 20-4000mPa.s into the polyvalent metal salt solution, and obtain spherical carboxymethyl cellulose after ion cross-linking, aging, and washing with a large amount of water. Cellulose hydrogel;

(2) Carboxymethyl cellulose alcohol gel microspheres are obtained by alcohol exchange, and the alcohol is ethanol, methanol or a mixture of the two.

(3) Drying the carboxymethyl cellulose alcohol gel microspheres to obtain porous carboxymethyl cellulose microspheres.

The multivalent metal salt solution is an aqueous solution containing Fe3+, Cu2+, Zn2+, Ca2+ or Mg2+ metal ions, and the concentration of the above-mentioned multivalent metal ions is 0.01-0.5mol/L

Cigarette samples were prepared from the composite filter containing porous carboxymethylcellulose microspheres (the content of the microspheres was 15 mg/stick), and cigarettes prepared from ordinary cellulose acetate filters under the same production conditions were used as control samples. The measurement results of hydrogen cyanide and tar release in flue gas are shown in the table below, which can reduce the release of HCN by 32%, while tar has little effect.

The outstanding feature of this utility model is that by adding porous carboxymethyl cellulose microspheres in the composite section of the filter core and using a dense acetate layer outside, the flue gas is fully contacted with the porous carboxymethyl cellulose microspheres to realize hydrogen cyanide High-efficiency adsorption can reduce the release of hydrogen cyanide in the mainstream smoke of cigarettes, while the tar release and sensory quality are less affected.

Description of drawings

Fig. 1 is a longitudinal sectional view of a filter tip of the present invention.

1. Filter element; 2. Inner wrapping layer; 3. Outer wrapping layer; 4. Ordinary cellulose acetate section; 5. Porous carboxymethyl cellulose microsphere composite section; 5a. Porous carboxymethyl cellulose microsphere gathering core; 5b Dense acetate covering.

Detailed ways

The utility model is further described below in conjunction with accompanying drawing:

As shown in Figure 1: a composite filter tip containing porous carboxymethyl cellulose, which consists of a filter element 1 and an inner wrapping layer 2 and an outer wrapping layer 3 wrapped on the filter element. The filter element 1 is a composite filter element, which is sequentially connected by ordinary cellulose acetate segment (4), porous carboxymethyl cellulose microsphere composite segment (5) and ordinary cellulose acetate segment (4). Wherein: the composite segment of porous carboxymethyl cellulose microspheres (5) is composed of a gathering core of porous carboxymethyl cellulose microspheres (5a) inside and a dense acetate fiber coating (5b) outside.

Claims (1)

1. A composite filter tip containing porous carboxymethyl cellulose microspheres is composed of a filter element and an inner wrapping layer and an outer wrapping layer wrapped on the filter element, it is characterized in that: the filter element is a composite filter element, which is made of ordinary acetic acid The fiber segment, the porous carboxymethyl cellulose microsphere composite segment and the ordinary cellulose acetate segment are connected, wherein the porous carboxymethyl cellulose microsphere composite segment is composed of the inner porous carboxymethyl cellulose microsphere gathering core and the outer Composed of a dense acetate covering.