CN106868942B

CN106868942B - Functional paper core wire for filter stick and preparation method thereof

Info

Publication number: CN106868942B
Application number: CN201710129094.6A
Authority: CN
Inventors: 孙文轩; 肖松; 李敏; 许迎春
Original assignee: Yunnan Xinyun Technology Development Co ltd
Current assignee: Jiangxi Huabao Xinhui Technology Co ltd
Priority date: 2017-03-06
Filing date: 2017-03-06
Publication date: 2021-02-26
Anticipated expiration: 2037-03-06
Also published as: CN106868942A

Abstract

The invention provides a functional paper core wire for a filter stick and a preparation method thereof. The functionalized paper core wire is formed by twisting narrow functionalized paper materials with functionalized substances, and the functionalized paper core wire is a strip-shaped core wire with the diameter of 0.1-3.0 mm. The paper core wire has the advantages of good on-machine stability, high safety, good functionalization realization performance and high production efficiency of the preparation method.

Description

Functional paper core wire for filter stick and preparation method thereof

Technical Field

The invention belongs to the technical field of cigarette accessories, and particularly relates to a functional paper core wire for a filter stick and a preparation method thereof.

Background

The traditional core wire filter stick is mainly characterized in that a plurality of folded yarns are embedded in a tow, and essence, a humectant and a harm reduction additive are added to the folded yarns, so that the folded yarns are endowed with functionalization. The production of the core wire is completed step by step through the steps of cabling, dyeing, dehydration, functional treatment, air drying, forming and the like, the production period is long, and the efficiency is low.

Chinese patent publication No. CN2464093Y discloses a cigarette filter with a core and various flavors, wherein one or more fiber lines with various flavors are added in the filter stick, so that different smoking flavors are introduced into the center line filter stick. Most of the materials selected by the fiber lines are cotton fibers or polyester fibers, the loading capacity is small, and the functionalization cannot be well performed.

CN102334751A discloses a paper core filter stick for cigarettes and a manufacturing method thereof, wherein a paper core containing polylactic acid fibers, nontoxic flame retardants and nontoxic water repellents is used as a filter material of the filter stick, the paper core can also contain acetate fibers, wood fibers and the like, and the paper core filter stick is manufactured by a method of firstly adding a plurality of components into paper pulp to make paper, making a paper core and then making the paper core into a filter stick.

CN103767069A discloses compound filter rod of crinkle paper silk for cigarette, its characterized in that: the filter is formed by connecting and splicing the end surfaces of a crepe paper filter element (6) and an acetate fiber filter element (5) together and wrapping the filter in the same piece of outer ring forming paper (2) in a compounding way; the crepe paper filter element (6) is made of cigarette paper, the cigarette paper is made of wood pulp fiber as a main raw material in the paper making process, a small amount of carbon fiber or tobacco shred is doped, the doping proportion is 15-30%, and an additive for enhancing the smell absorption or the filtering performance is sprayed; firstly, crumpling the cigarette paper, wherein the depth of a wrinkle formed by crumpling is 100-1000 microns; then cutting into filaments with the width of 0.1-1.5mm and the length of 10-30mm, and then rolling the filaments with irregular sequence into filaments with the density of 1-3 g/cm by adopting a cigarette plug assembler³Finally, the filter strip is cut into designed length.

CN103284327A discloses a tobacco paper filter stick of composite bamboo fiber and a preparation method thereof. The paper filter stick is composed of a filter element and a piece of forming paper, the filter element is obtained by rolling paper fibers, the paper fibers are prepared by proportioning tobacco fiber pulp and bamboo fiber pulp according to a certain proportion, pulping, pressing and drying the pulp, and then the pulp is made into a fiber paper base, and the fiber paper base is coated, dried and rolled to obtain the paper fibers. "research on influence of activated carbon and chitosan on release amount of volatile carbonyl compounds in mainstream smoke of cigarettes", ever Wanyi et al, fine chemical intermediates, 44(2), 2014, compared adsorption effects of activated carbon and chitosan respectively coated on paper filter elements on carbonyl compounds, tar, carbon monoxide and the like in mainstream smoke. The activated carbon and the chitosan have better adsorption effect on carbonyl compounds in the mainstream smoke of the paper filter stick cigarette; the adsorption capacity of chitosan to carbonyl compounds in main stream smoke is superior to that of activated carbon, the chitosan has no obvious influence on tar and nicotine, and the chitosan has a selective adsorption effect on the carbonyl compounds.

In the dyeing process of the fiber lines, when pigments are selected, the coloring power is not strong, and the condition of uneven dyeing is easy to occur; dyeing with dyes does not have good safety properties. In addition, in the production process of fiber lines, 2-10 unequal joints are generated in each spindle line, the appearance effect is influenced, and the situation of line breakage can occur in the forming process of filter sticks, so that the processing is not facilitated.

In addition, in the prior art, the use of pulp containing functionalized materials for making paper and then making the core severely limits the range of paper options and imposes severe limitations and impacts on the pulp and paper making process.

Further, in the above prior art, the process is performed around a paper filter stick, and the paper is wrapped by a wrapping paper through roll forming to directly make the filter stick, wherein the width of the paper is generally over 100mm, the circumference of the paper core is about 24mm, and the paper must be embossed before forming. In addition, when the paper filter stick is used on a cigarette, heat collapse is generated, paper impurity gas is introduced, the pressure drop is unstable, the cigarette suction resistance fluctuation is large, and the quality of the cigarette is seriously influenced.

The paper core wire which is not mixed with paper miscellaneous gas, is compact in the core wire compared with the inner core of a common paper filter stick and is easy to control the pressure drop stability is needed in the field.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a functional paper core wire for a filter stick and a preparation method thereof. Therefore, the present invention provides the following technical solutions to solve the above technical problems at the same time.

In one aspect of the invention, the functionalized paper core wire for the filter stick is characterized in that the functionalized paper core wire is formed by twisting narrow functionalized paper with a functionalized substance, and the functionalized paper core wire is a strip-shaped core wire with the diameter of 0.1-3.0 mm.

In the prior art, the process is generally carried out around a paper filter stick, paper is rolled and formed, and is wrapped by forming paper to directly prepare the filter stick, the width of the paper is generally more than 100mm, the circumference of a paper core is about 24mm, and embossing treatment is required before forming. In addition, when the paper filter stick is used on a cigarette, heat collapse is generated, paper miscellaneous gas is introduced, the pressure drop is unstable, and the quality of the cigarette is seriously influenced. Compared with the paper core wire, the paper core wire is formed by twisting narrow paper into a core wire with the diameter of 0.1-3mm, the paper material consumption is low, the essence substances can play a role in inhibiting miscellaneous gas, and no paper miscellaneous gas is found after evaluation; in addition, the twisted paper core wire is compact relative to the inner core of the paper filter stick, so that the phenomenon of collapse cannot occur; the pressure drop stability of the paper core wire filter stick is easy to control.

The width of the narrow width functionalized paper may be from 1.0 to 50.0mm, preferably from 10 to 40mm, more preferably from 10 to 25 mm.

Preferably, the narrow width functionalized paper has a breaking strength of 1000-.

The grammage of the narrow functionalized paper can be 20-40g/m²Preferably 25 to 36g/m²。

Preferably, the functional substance comprises at least one of a flavoring aid, a moisture retention aid, a slow-release fragrance-carrying aid and a pigment. More preferably, the functional substance comprises at least one of a flavoring aid, a moisture retention aid and a slow-release fragrance-carrying aid and a pigment. Further preferably, the functional substance simultaneously comprises a flavoring aid, a moisture retention aid, a slow-release fragrance-carrying aid and a pigment.

In another aspect of the invention, a preparation method of the functionalized paper core wire for the filter stick is provided, which is characterized by comprising the following preparation steps: (1) preparing a functional material liquid: mixing the functional substances to obtain a functional mixed feed liquid; (2) functional treatment: coating the functionalized feed liquid obtained in the step (1) on the surface of base paper in a single-sided printing or double-sided printing mode to obtain functionalized paper material; (3) slitting and rewinding: cutting the wide functional paper material obtained in the step (2), cutting into narrow functional paper materials, and rewinding into narrow roll paper; (4) core wire forming: twisting the narrow-width coil paper obtained in the step (3) into strip core wires, and winding the strip core wires around ingots for forming to obtain a finished product.

Preferably, the base paper contains harm reducing substances, and the harm reducing substances are directly added in a filler form in the paper making process to obtain paper with the harm reducing function.

Preferably, the surface of the paper core raw paper is not treated or is subjected to punching and embossing treatment.

The printing mode can be gravure printing, flexo printing or screen printing.

More specifically, the preparation method of the functionalized paper core wire comprises the following steps:

A. preparing a functional material liquid: mixing the aroma-enhancing auxiliary agent, the moisture retention auxiliary agent and the slow-release aroma-carrying functional auxiliary agent with a pigment respectively, wherein the pigment accounts for 0.1-2% by weight (based on the total weight of the auxiliary agents), and obtaining a functionalized mixed feed liquid;

B. paper material functionalization treatment: heating the functional material liquid obtained in the step A, and coating the functional material liquid on the surface of the base paper in a single-sided printing or double-sided printing mode, wherein the addition amount is 0.1-20g/m²Drying to obtain the functional paper material; the harm-reducing substance can be directly added with the filler in the paper making process to obtain paper with the harm-reducing function;

C. slitting and rewinding: b, cutting the wide functional paper material obtained in the step B, cutting into narrow functional paper materials with the width of 1.0-50.0mm, and re-rolling into narrow paper rolls;

D. core wire forming: and D, guiding the 1 or more narrow paper rolls obtained in the step C into a forming device, twisting the narrow paper into strip core wires with the diameter of 0.1-3.0mm through high-speed rotation of the axle center of the machine, and winding the strip core wires around an ingot to form the finished product.

According to a preferred embodiment of the present invention, the functionalization treatments such as aroma enhancement, moisture retention, and slow release of aroma-carrying substances are preferably performed after the formation of the base paper, and the harm-reduction functionalization treatment is preferably performed during the paper-making process.

According to another preferred embodiment of the invention, the flavouring aid is selected from any one or a mixture of more of tobacco, floral, fruit, tea, herb, wine, milk and mint flavourings.

According to another preferred embodiment of the invention, the moisturizing aid is selected from the group consisting of glycerol, propylene glycol, xylitol, polyethylene glycol, honey, sodium pyrrolidone carboxylate, sodium lactate, sorbitol, hyaluronic acid, malto-oligosaccharide alcohol, galactofuranose acid, sucrose esters, and mixtures of any one or more thereof.

According to another preferred embodiment of the present invention, the slow release flavor-carrying adjuvant is a slow release gel of a composite colloid having a melting point of 40-80 ℃ mixed with any one or more of tobacco, flower, fruit, tea, herb, wine, milk and mint flavors, respectively.

According to a preferred embodiment of the invention, the pigment is an edible natural pigment or an edible synthetic pigment. The edible natural pigment is selected from Capsici fructus, beet red, Red Rice Red, radix Raphani Red, sorghum Red, annatto, chlorophyll, Gardenia yellow, Curcuma rhizome, cacao shell color, carotene or caramel pigment; the edible synthetic color is selected from amaranth, carmine, lemon yellow, new red, erythrosine, allura red, sunset yellow, brilliant blue, indigo and its aluminum lake, quinoline yellow, etc.

According to a preferred embodiment of the present invention, the functionalized harm-reducing filler is selected from activated carbon, montmorillonite, zeolite, molecular sieve, attapulgite, medical stone, diatomite, sepiolite and nano-silica.

According to a preferred embodiment of the present invention, the base paper is a natural plant fiber paper or a chemical fiber paper.

According to a preferred embodiment of the present invention, the surface of the paper core base paper is not treated or is perforated and embossed.

According to a preferred embodiment of the present invention, the grammage of the paper core base paper is 5-200g/m²；

According to a preferred embodiment of the invention, the printing is gravure, flexo or screen printing.

In the preparation method of the functionalized paper core wire, after paper materials are cut, the paper materials are soaked by water (such as tap water), the soaked paper materials are placed (preferably placed in a semi-sealed mode) for 8 to 30 hours, preferably about 24 hours, and then the preparation of a paper core wire sample is started. The impregnation can be carried out before or after rewinding into narrow rolls. The inventor unexpectedly discovers that due to the infiltration effect, the softness of the paper can be increased, the paper has a certain lubricating effect, the paper can more easily pass through the shrinkage cavity of the forming equipment to reach the ideal diameter of the paper core wire, and simultaneously, the weak adhesion effect of water enables the paper to be difficult to untwist after the paper is made into the core wire. In the prior art, the impregnation step is not included because the functionalized paper is generally considered to be softer and further impregnation may result in loss of the functionalized material. The inventors have found that, because the paper material has a good retention effect on the functionalized substance, for example, the paper material has a large specific surface area and a loose internal structure, the functionalized substance has a strong adhesion force and is uniformly distributed on the paper material, the functionalized substance is not easy to run off, and in addition, the paper material is not easy to unwind after being made into a wire due to the weak adhesion effect of water, which was not expected in advance.

The inventor finds that if 0.05-5.0 wt%, preferably 0.1 wt%, of the wetting assistant represented by the following formula (I) is added to the water, a better anti-uncoiling effect can be achieved, and the loss of the functionalized material can be more effectively prevented:

RO-(EO)_a-(PO)_b-H formula (I)

In formula (1), R is a 3, 5-dimethylhexyl group, EO is an oxyethylene group, PO is an oxypropylene group, a and b are moles, a is 3 to 15, b is 2 to 5, and a/b is 0.6 to 3.0.

The use of the infiltration auxiliary agent can effectively shorten the infiltration time, reduce the loss of functional materials, improve the production efficiency, and simultaneously effectively reduce the surface tension of paper materials, so that the twisting is easier. Further research also finds that the wetting auxiliary agent can generate a certain cross-linking-similar combination effect with paper fibers, and can further improve the anti-uncoiling capability of paper after being made into a core wire.

The invention has the beneficial effects that: compared with a fiber core wire, the functional paper core wire for the filter stick has the advantages that:

(1) the stability of the machine is good: compared with the method that 2-10 joints are generated in each ingot in the production process of the fiber type core wire, the paper wire is not connected after being formed, the breaking strength of the twisted paper wire is increased, the phenomenon of wire breakage of the fiber type core wire can be avoided in the forming process of the filter rod, and the stability of the on-machine is ensured.

(2) The safety is high: the fiber core wire is made of cotton fiber or polyester fiber, and due to the problems of low tinting strength, uneven dyeing and the like, dyes are often selected for dyeing, and most dyes do not have good safety performance. The coloring agent used by the paper thread is edible natural pigment and synthetic pigment, and the paper material has large specific surface area and loose internal structure, so that the pigment has strong coloring power and uniform dyeing on the paper material, and has good safety performance.

(3) The functional realization is good: the traditional fiber core wire is functionalized after being twisted, and because the used material has a compact internal structure, a small specific surface area and a small load capacity, the functionalization can not be well reflected. The paper material is loose in internal structure and large in specific surface area, and the functionalized raw material is easy to load on the surface of the paper material, so that the loading capacity of the paper material can be effectively improved.

(4) The functional timeliness is improved: the traditional fiber core wire is functionally loaded in a soaking mode, and functional substances are mainly attached to the surface of the fiber, so that the active ingredients are easily lost. The paper wire wraps the functional substance inside the wire in a twisting mode, so that the main components of the paper wire can be effectively reserved, and the functional timeliness is prolonged.

(5) The production efficiency is high: compared with the step-by-step process of cabling, dyeing, dewatering, functional treatment, air drying and forming in the production of fiber core wires, the dyeing, the functional treatment and the drying of the paper wires can be carried out simultaneously, and the production efficiency of the paper wires can be effectively improved.

(6) High innovativeness. During papermaking, the harm reducing filler and the paper pulp can be simultaneously made, and compared with forms such as fiber core wire group grafting, the harm reducing filler and the paper pulp widen the realization path of core wire harm reduction. In addition, the paper core wire is used as a carrier of the slow-release fragrance-carrying material, cannot be copied by the fiber core wire, and provides a new technical direction for the functional development of the core wire.

(7) The paper core wire is a core wire with the diameter of 0.1-3mm which is formed by twisting narrow paper, the paper material consumption is small, the essence substances can play a role in inhibiting miscellaneous gas, the paper miscellaneous gas is not found through evaluation, in addition, the twisted paper core wire is compact relative to the inner core of the paper filter stick, the phenomenon of collapse cannot occur, and the pressure drop stability of the paper core wire filter stick is easy to control.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The present invention will be described in further detail with reference to examples, which are not intended to limit the technical scope of the present invention. Any person skilled in the art should be able to cover the technical scope of the present invention by the equivalent or change of the scheme and the inventive concept of the present invention in the technical scope of the present disclosure.

Example 1

Adding 2.0% caramel pigment into the tobacco flavor enhancing raw material to prepare flavor enhancing functional material liquid. And adding the functional material liquid at a ratio of 20g/m²The additive amount of (A) is printed on one surface of the untreated substrate by gravure printing, and the gram weight of the untreated substrate is 200g/m²The functionalized paper material is cut into narrow roll paper with the width of 30mm after being dried on the natural plant fiber paper. Guiding 1 strip of narrow paper into a forming device, twisting the narrow paper into a strip core wire with the diameter of 3.0mm by high-speed rotation of the axis of the machine, and forming the strip core wire by winding an ingot to obtain the finished productAnd (5) preparing the product.

Example 2

0.1 percent of chlorophyll is added into the mint flavor-enhancing raw material to prepare flavor-enhancing functional feed liquid. And adding 0.1g/m of functional material liquid²The additive amount of (A) is printed on the surface of the fabric in a flexo printing mode and is punched, and the gram weight is 5g/m²The functionalized paper material is cut into narrow roll paper with the width of 1mm after being dried on the natural plant fiber paper. 3 strips of narrow paper are led into a forming device, the narrow paper is twisted into strip core wires with the diameter of 0.1mm through the high-speed rotation of the axle center of the machine, and the strip core wires are wound around an ingot for forming, so that a finished product is obtained.

Example 3

Preparing 30% aqueous solution of polyethylene glycol, honey, sodium pyrrolidone carboxylate, malto-oligosaccharide alcohol and sucrose ester according to the mass ratio of 6:4:6:3:3, and adding 0.5% carotene to prepare the moisturizing functional material liquid. And adding 0.5g/m of functional material liquid²The additive amount of (A) is printed on the surface of the fabric in a flexo printing mode and is subjected to embossing treatment, and the gram weight of the fabric is 20g/m²The functionalized paper material is cut into narrow roll paper with the width of 10mm after being dried on the natural plant fiber paper. And (3) guiding 2 strips of narrow paper into a forming device, twisting the narrow paper into strip core wires with the diameter of 1.0mm by high-speed rotation of the axis of the machine, and forming the core wires in a duplex winding manner to obtain a finished product.

Example 4

Preparing glycerol, polyethylene glycol, sodium lactate, sorbitol and galactofuranose into 30% ethanol solution according to the mass ratio of 7:10:4:2:2, and adding 1.0% sunset yellow to obtain moisturizing functional material liquid. And adding the functional material liquid at a ratio of 5g/m²The additive amount of (A) is printed on the surface of the fabric in a screen printing mode in a double-sided way and is subjected to embossing treatment, and the gram weight of the fabric is 30g/m²The functionalized paper material is cut into narrow roll paper with the width of 15mm after being dried. Leading the paper into a forming device, twisting the narrow paper into a strip core wire with the diameter of 1.0mm by high-speed rotation of the axle center of the machine, and forming the paper around an ingot to obtain a finished product.

Example 5

Mixing composite colloid with melting point of 40 deg.C and fruit essenceMixing to obtain sustained-release gel, adding 1.0% of sorghum red pigment, and making into sustained-release fragrance-carrying functional liquid. Punching the surface of the substrate to obtain a surface with a gram weight of 60g/m²The chemical fiber paper is cut into 50mm wide narrow roll paper, and the functional material liquid is added at a ratio of 10g/m²The additive amount of (2) is double-side printed on narrow paper by gravure printing. And (3) after cooling, guiding 1 piece of narrow paper into a forming device, twisting the narrow paper into a strip core wire with the diameter of 1.8mm through high-speed rotation of the axis of the machine, and forming the strip core wire by winding around an ingot to obtain a finished product.

Example 6

The composite colloid with the melting point of 60 ℃ is mixed with the bouquet essence to prepare the slow-release gel, and 1.0 percent of lemon yellow pigment is added to prepare the slow-release fragrance-carrying functional feed liquid. And adding the functional material liquid at a ratio of 10g/m²The additive amount of (A) is printed on the surface of the fabric by a screen printing mode and is subjected to embossing treatment, and the gram weight of the fabric is 70g/m²After cooling, the functional paper material is cut into narrow roll paper with the width of 15 mm. And (3) guiding the paper into a forming device, twisting the narrow paper into a strip core wire with the diameter of 1.8mm by high-speed rotation of the axis of the machine, and forming the strip core wire by winding the strip core wire around an ingot to obtain a finished product.

Example 7

Mixing the composite colloid with melting point of 80 deg.C with herba Menthae and fruit essence to obtain sustained release gel, adding 0.8% annatto pigment, and making into sustained release functional liquid. The surface is perforated, the gram weight is 36g/m²The plant cellulose paper of (2) was cut into a narrow roll of 10mm wide. Introducing 2 strips of narrow paper into a forming device, twisting the narrow paper into strip core wires with the diameter of 1.5mm by high-speed rotation of the machine axis, introducing into a trough filled with slow-release fragrance-carrying liquid, and adding 10g/m²And cooling the material liquid on the paper core wire, and then winding the ingot to form the finished product.

Example 8

During papermaking, montmorillonite, zeolite, molecular sieve, attapulgite, medical stone, diatomite, sepiolite, nano silicon dioxide and plant fiber paper pulp are simultaneously made into paper with the gram weight of 50g/m²And cutting the harm-reducing paper into narrow roll paper with the width of 15 mm. Will be provided withAnd (3) leading the narrow-width roll paper into a forming device, twisting the narrow-width roll paper into a strip core wire with the diameter of 1.5mm through high-speed rotation of the axis of the machine, and forming the strip core wire by winding around an ingot to obtain a finished product.

Example 9

During papermaking, the activated carbon and the plant fiber paper pulp are simultaneously made into paper with the gram weight of 60g/m²And cutting the harm-reducing paper into narrow roll paper with the width of 10 mm. And (3) guiding the narrow-width roll paper into a forming device, twisting the narrow-width roll paper into a strip core wire with the diameter of 1.2mm through high-speed rotation of the axis of the machine, and forming the strip core wire in a winding manner to obtain a finished product.

Example 10

The composite colloid with the melting point of 60 ℃ is mixed with the tea essence to prepare the slow-release gel, and the slow-release fragrance-carrying functional material liquid is prepared without adding pigment. And adding the functional material liquid at a ratio of 8g/m²The additive amount of (A) is printed on the surface of the fabric in a double-sided way in a gravure printing way and is subjected to embossing treatment, and the gram weight of the fabric is 32g/m²After cooling, the functional paper material is cut into narrow roll paper with the width of 15 mm. Leading the paper into a forming device, twisting the narrow paper into a strip core wire with the diameter of 1.2mm by high-speed rotation of the axle center of the machine, and forming the paper in a way of winding around an ingot to obtain a finished product.

Example 11

0.5 percent of chlorophyll is added into the mint flavor to prepare the flavor-enhancing functional feed liquid. And printing the functional liquid on natural plant fiber paper with untreated surface and the gram weight of 28g/m2 in a gravure printing mode by the addition amount of 8g/m2, drying and cutting into narrow paper with the width of 25 mm. And (3) guiding 1 piece of narrow paper into a forming device, twisting the narrow paper into a strip core wire with the diameter of 1.2mm by high-speed rotation of the axis of the machine, and forming the strip core wire in a duplex winding manner to obtain a finished product.

Experimental examples: comparative evaluation of cigarette samples

The preparation of the existing aroma-enhancing filter rod sample and the fiber core wire filter rod comprises the following steps:

the aroma-enhanced paper threads with the length of 10mm and the diameter of 1.2mm, which are prepared according to the invention, are selected for weighing, the appearance is observed, and the aroma-enhanced paper threads are introduced into cigarettes with certain brands of filter tips with the length of 25mm, so that the aroma-enhanced paper thread cigarette samples can be obtained.

Soaking 10m fiber core line with length and diameter of 1.2mm in mixed solution of peppermint essence and chlorophyll for 4h, drying at low temperature, weighing, observing appearance, and introducing into cigarette with filter tip length of 25mm to obtain control cigarette.

Storing and smoking cigarettes:

the prepared cigarettes are stored for four weeks in an environment with the temperature of 22 ℃ and the humidity of 60%, and a group of cigarettes are taken every week for smoking evaluation. The smoking evaluation is carried out by a group consisting of 7 smoking experts according to the standard of GB5606.4-2005 cigarette sensory technical requirement, and the evaluation result is determined and is shown in Table 1.

TABLE 1 evaluation results of different cigarettes

As can be seen from the results listed in table 1, the paper yarn has a uniform appearance and uniform color after being dyed, compared with the existing fiber core yarn; the loading capacity of the essence can reach 4.70 times of that of the fiber core wire; the paper pastille is evenly released, and the aroma-holding timeliness is obviously prolonged. Compared with the filter element prepared by adding the functional material into the paper pulp to make paper, the functional material in the filter element has little loss and is not damaged by the paper making process.

This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to make and use the invention. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims. All citations referred to herein are incorporated herein by reference to the extent that no inconsistency is made.

Claims

1. A functional paper core wire for a filter stick is characterized in that the functional paper core wire is formed by twisting narrow functional paper with a functional substance applied on the surface, and the functional paper core wire is a strip core wire with the diameter of 0.1-3.0 mm; the width of the narrow width functionalized paper material is 1.0-50.0 mm; the narrow-width functionalized paper is prepared by soaking narrow-width functionalized paper with a functionalized substance applied to the surface with water.

2. The functionalized paper core for filter rods of claim 1, wherein the narrow width functionalized paper has a breaking strength of 1000 and 4000 cN.

3. The functionalized paper core for filter rods of claim 2, wherein the grammage of the narrow width functionalized paper is 20-40g/m²。

4. The functionalized paper core wire for a filter rod according to any one of claims 1 to 3, wherein the functionalized substance comprises at least one of a flavoring aid, a moisture retention aid, a slow-release flavor-loading aid and a pigment.

5. The functionalized paper core wire for the filter stick according to claim 4, wherein the functionalized substance simultaneously comprises a flavoring aid, a moisture retention aid, a slow-release flavor-carrying aid and a pigment.

6. The preparation method of the functionalized paper core wire for the filter stick in the claim 1 is characterized by comprising the following preparation steps:

(1) preparing a functional material liquid: mixing the functional substances to obtain a functional mixed feed liquid;

(2) functional treatment: coating the functionalized feed liquid obtained in the step (1) on the surface of base paper in a single-sided printing or double-sided printing mode to obtain functionalized paper material;

(3) slitting and rewinding: cutting the functionalized paper material obtained in the step (2), cutting into narrow functionalized paper materials, and rewinding into narrow roll paper; soaking the slit narrow functional paper material with water before or after rewinding into narrow roll paper;

(4) core wire forming: twisting the narrow-width coil paper obtained in the step (3) into strip core wires, and winding the strip core wires around ingots for forming to obtain a finished product.

7. The preparation method of claim 6, wherein the base paper contains harm reducing substances, and the harm reducing substances are directly added in a filler form in a paper making process to obtain paper with harm reducing function.

8. The preparation method of claim 7, wherein the surface of the raw paper for the paper core wire is untreated or is subjected to perforation and embossing treatment.

9. The method according to any one of claims 6 to 8, wherein the printing is gravure printing, flexo printing or screen printing.