CN115736345A - Filter tip containing bulked yarn - Google Patents

Abstract

A filter tip containing bulked yarn comprises an outer wrapping layer and a filtering unit wrapped inside the outer wrapping layer; the filter unit comprises at least two bulked yarns, the direction of the filter unit from head to tail is consistent with the direction of smoke, the adjacent bulked yarns are contacted with each other, and the outer side part of the bulked yarn forming the outer side wall of the filter unit is contacted with the inner side wall of the outer cladding; the bulk yarn comprises a high-shrinkage core yarn and a low-shrinkage outer yarn, the number of the core yarn and the number of the outer yarn are at least one, the core yarn is located in the middle of the bulk yarn where the core yarn is located, the outer yarn is wound outside the core yarn, the outer yarn is provided with a plurality of coils which are connected in sequence along the core yarn, and the diameter of each coil is larger than that of the core yarn. The design can replace the application of the diacetate fibers in the aspect of cigarette filters.

Description

Filter tip containing bulked yarn

Technical Field

The invention relates to a filter tip, belongs to the field of tobacco products, and particularly relates to a filter tip containing bulked yarns.

Background

In the existing tobacco products, no matter cigarettes or heating non-burning cigarettes, a filter tip is arranged at the inlet end of the existing tobacco products to reduce the temperature of smoke and adsorb harmful substances. Most of the existing filters are made of cellulose acetate.

The acetate fiber is prepared by reacting wood and cotton linter with chemical raw materials such as acetic acid to obtain a spinning raw material vinegar sheet and then spinning, and the tow used for the filter tip of the tobacco product is mainly diacetate fiber. The acetate fiber filter tip is a mechanical filter tip widely accepted by low-tar and high-tar cigarette consumers at present, is nontoxic, tasteless, impact-resistant, oil-resistant, free of static electricity, small in suction resistance, strong in adsorption force, and good in elasticity and thermal stability.

However, the equipment and materials of the acetate fibers mainly depend on import, the cost is high, especially the equipment manufacturing technology is monopolized abroad for a long time, the production cost is high, the existing production capacity is insufficient, even if most of the vinegar sheets are used for producing cigarette filter sticks, the market demand cannot be met, and the development of the vinegar sheets in other textile application fields is also limited.

The fundamental reason for the current situation is that a new design is lacked to replace the application of the diacetate fibers in the cigarette filter stick (core section in the filter), so that most of the diacetate fibers are limited on the cigarette filter stick.

The information disclosed in this background section is only for enhancement of understanding of the general background of the patent application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is already known to a person skilled in the art.

Disclosure of Invention

The invention aims to overcome the defects and problems that diacetate fibers cannot be replaced in the application of cigarette filters in the prior art, and provides a filter containing bulked yarns, which can replace diacetate fibers in the application of cigarette filters.

In order to achieve the above purpose, the technical solution of the invention is as follows: a filter tip containing bulked yarn comprises an outer wrapping layer and a filtering unit wrapped inside the outer wrapping layer;

the filter unit comprises at least two bulked yarns, the direction of the filter unit from head to tail is consistent with the direction of smoke, the adjacent bulked yarns are contacted with each other, and the outer side part of the bulked yarn forming the outer side wall of the filter unit is contacted with the inner side wall of the outer cladding;

the bulk yarn comprises a high-shrinkage core yarn and a low-shrinkage outer yarn, the number of the core yarn and the number of the outer yarn are at least one, the core yarn is located in the middle of the bulk yarn where the core yarn is located, the outer yarn is wound outside the core yarn, the outer yarn is provided with a plurality of coils which are connected in sequence along the core yarn, and the diameter of each coil is larger than that of the core yarn.

The coil comprises a coil side strip, and a coil high point and a coil low point which are connected with two ends of the coil side strip, wherein the coil high point and the coil low point are respectively positioned above and below the core yarn, and the arrangement structure of the coil high point and the coil low point is any one of the following structures:

at least one point of the circle high points and the circle low points is contacted with the outer side periphery of the core yarn;

the loop high points and the loop low points are far away from the core yarn, a high loop gap is formed between the loop high points and the core yarn, and a low loop gap is formed between the loop low points and the core yarn.

In the bulked yarn, loop gaps exist between adjacent loops.

In two adjacent bulked yarns, the coil on the other bulked yarn is inserted into at least one coil gap on one bulked yarn, and the number of the coils inserted into the single coil gap is at least one.

In the bulked yarn, the outer yarn is wound outside the core yarn in a spiral structure in a ring-shaped mode, and the ring in the spiral structure is a coil.

The arrangement structure of all bulked yarns in the filter unit is any one of the following structures:

all the bulked yarns are stacked side by side, and the direction of each bulked yarn from head to tail is consistent with the direction of smoke;

all the bulked yarns are mutually twisted or woven into a yarn rod, and the direction of the yarn rod from head to tail is consistent with the direction of the smoke.

The filter unit comprises at least two subunits, and the direction of all the subunits is consistent with the direction of the smoke from head to tail; the subunit comprises at least two bulked yarns, and the arrangement structure of all the bulked yarns in a single subunit is any one of the following:

all the bulked yarns are stacked side by side, and the direction of each bulked yarn from head to tail is consistent with the direction of smoke;

all bulked yarns are twisted or woven into a sub-yarn rod, and the direction of the sub-yarn rod from head to tail is consistent with the direction of smoke.

The filter unit comprises at least one rolling rod, the trend of the rolling rod from head to tail is consistent with the trend of the smoke, the rolling rod is formed by winding middle cloth, and the middle cloth is formed by weaving a plurality of bulked yarns.

The filter unit comprises a plurality of folded filter sheets, the length of a single filter sheet is less than or equal to that of the filter unit, and the filter sheets are woven by a plurality of bulked yarns.

The filter also comprises a plurality of side-entering wires, and the arrangement structure of the side-entering wires is any one or any combination of the following structures:

one end of the single side wire inlet is connected with the inner side wall of the outer cladding layer, and the other end of the single side wire inlet is positioned in the filtering unit;

one end of the single side wire is connected with the inner side wall of the outer cladding layer, and the other end of the single side wire penetrates through the filtering unit or is in contact with the filtering unit and then is connected with the inner side wall of the outer cladding layer;

one end of the single side wire entering is connected with the inner side wall of the outer cladding layer, and the other end of the single side wire entering is in contact with the outer side wall of the filtering unit.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention relates to a filter tip containing bulked yarns, which comprises an outer covering layer and a filtering unit wrapped in the outer covering layer, wherein the filtering unit comprises at least two bulked yarns, each bulked yarn comprises a core yarn positioned in the middle and an outer yarn wrapped outside the core yarn, the wrapping structure of the outer yarn on the core yarn is represented by a plurality of coils which are sequentially connected along the axial direction of the core yarn, and the diameter of a single coil is larger than that of the core yarn, and the filter tip has the advantages that: firstly, the unique structure of the bulked yarn has strong bulkiness, the bulkiness can provide the outward-expanding tension, and the tension is favorable for the stability and firmness of the combination between the filtering unit and the outer wrapping layer; secondly, the plurality of coils arranged on the bulked yarn along the axial direction of the bulked yarn can enrich the internal space of the filtering unit, prolong the length of a path of smoke passing through the filtering unit and improve the adsorption effect on harmful substances in the smoke; and the single bulked yarn is made of the core yarn and the outer yarn, so that the adjustability is strong, the fineness of the fiber can be adjusted in the production process (the raw material fibers with different fineness can be screened, and the production process can be controlled), the diameter of the bulked yarn is made to be far smaller than that of the existing diacetate fiber, the integral specific surface area of the filtering unit is enlarged, and the integral adsorption capacity of the filtering unit is improved. Therefore, the design combines the structural characteristics of the bulked yarn, the bulked yarn is used as a base, the bulked yarn is arranged into a filtering unit in a proper structure, the function of a filter tip can be exerted, the manufacturing equipment and the manufacturing process of the bulked yarn exist in China, the manufacturing equipment and the manufacturing process of the bulked yarn cannot be limited by foreign technologies, the input cost is greatly reduced, the production from raw materials to equipment to the technology can be finished in China, the current situation of a neck is broken through, the improvement of the productivity is facilitated, and the productivity of the existing acetate fiber is liberated. Therefore, the invention can replace the application of the diacetate fiber in the aspect of cigarette filter.

2. In the filter tip containing the bulked yarns, the bulked yarns are used as basic composition units of the filter unit, and a single bulked yarn is made of the core yarn and the outer yarn, so that the adjustability is strong, the porosity of the filter unit can be greatly adjusted, and the adjustment modes are various, for example, the fiber ratio between high-shrinkage fibers and low-shrinkage fibers in the raw materials of the bulked yarns is adjusted; adjusting the twist coefficient of the yarn in the manufacturing process of the bulked yarn; adjusting the bulkiness of the bulked yarn during the wet-heat setting treatment in the manufacturing process of the bulked yarn. Therefore, the design has a strong adjusting function in the aspect of porosity of the filter unit, so that the filter has strong adjusting capacity in the aspect of pressure drop of the filter tip, and can not reduce the pressure drop to limit the filtering efficiency of nicotine and glycerin, and can not increase the pressure drop to cause that smokers are difficult to accept due to hard suction, thereby being beneficial to obtaining the approval of the smokers. Therefore, the invention not only has stronger pressure drop adjustability, but also can give consideration to the comfort of adsorption and suction, and is beneficial to being accepted by smokers.

3. In the filter tip containing the bulked yarns, a single coil comprises a coil side strip, and a coil high point and a coil low point which are connected with the two ends of the coil side strip, wherein the coil high point and the coil low point are respectively positioned above and below the core yarns, the arrangement structure of the coil high point and the coil low point is various, at least one of the coil high point and the coil low point is in contact with the outer side periphery of the core yarns (the first type), the coil high point and the coil low point are both far away from the core yarns, a high coil gap is clamped between the coil high point and the core yarns, a low coil gap (the second type) is clamped between the coil low point and the core yarns, particularly the second type, and the filter tip has richer spatial levels during application, can further prolong the path length of smoke passing through a filter unit, and improves the adsorption effect on harmful substances in the smoke. Therefore, the adsorption effect of the invention is stronger.

4. In the filter tip containing the bulked yarns, the arrangement structures of all the bulked yarns in the filter unit are various and are heavier, if the bulked yarns are stacked side by side, if the bulked yarns exist in the form of yarn rods, winding rods or filter sheets, different requirements such as coordination among various pressure drops, adsorption effects and supporting effects are met, and particularly when loop gaps and loops are inserted between two adjacent bulked yarns, a longer smoke passing path is provided, the adsorption effect is enhanced, and meanwhile, the supporting effect can be enhanced. Therefore, the invention has strong adjustability and can take multiple performances of the filter tip into consideration.

5. The filter tip containing the bulked yarn can be additionally provided with a plurality of side inlet wires, the side inlet wires are diversified in arrangement structure, the basic principle is that at least one end of each side inlet wire is connected with the inner side wall of the outer cladding, the other end of each side inlet wire is not limited to be connected with the inner side wall of the outer cladding, but the side inlet wires are contacted with the filter unit and can be preferably connected with each other, for example, the side inlet wires are positioned in the filter unit or penetrate through the filter unit, so that the filter unit can be provided with longitudinal supporting force similar to the longitudinal supporting force, the filter tip is stabilized, the existing smoke circulation path in the filter unit can be divided again, the space level is increased, the smoke path is prolonged, in addition, on the basis of the design, if the material of the side inlet wires can be limited to be PLA, the heat absorption effect of the PLA can be exerted, the temperature of smoke is reduced, the suction comfort level is improved, and meanwhile, the shape change can be generated after heat absorption, and the connection firmness between the internal structures of the filter unit or the side inlet wires can be improved, so that the whole filter tip is firm. Therefore, the invention not only has better adsorption and cooling effects, but also has stronger overall firmness and stability.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic view of the construction of the bulked yarn of fig. 1.

Figure 3 is a schematic view of the construction of the filter unit of the present invention with all of the bulked yarns stacked side-by-side.

Fig. 4 is a schematic view showing the structure of the filter unit according to the present invention in which all bulked yarns are twisted or woven with each other to form a yarn rod.

Fig. 5 is a schematic diagram of the distribution of subunits in the filtration unit of the present invention.

Fig. 6 is a schematic view of the structure of the roll of the present invention.

Fig. 7 is a schematic view of the distribution of the filter sheets in the filter unit according to the invention.

FIG. 8 is a schematic view of the combination of a side-entry wire and a filter unit of the present invention.

FIG. 9 is a schematic view of the connection between the side-in filament and the over-cladding layer of the present invention.

In the figure: the outer covering layer 1, the filter unit 2, the subunit 21, the sub yarn rod 22, the bulked yarn 3, the core yarn 31, the outer yarn 32, the coil 33, the coil high point 331, the coil side strip 332, the coil low point 333, the high coil gap 334, the low coil gap 335, the coil gap 34, the yarn rod 4, the winding rod 5, the middle cloth 51, the filter sheet 6 and the side inlet wire 7.

Detailed Description

The present invention will be described in further detail with reference to the following description and embodiments in conjunction with the accompanying drawings.

Referring to fig. 1 to 9, a filter containing a bulked yarn includes an outer wrap 1 and a filter unit 2 wrapped inside thereof;

the filter unit 2 comprises at least two bulked yarns 3, the direction of the filter unit 2 from head to tail is consistent with the direction of smoke, the adjacent bulked yarns 3 are contacted with each other, and the outer side parts of the bulked yarns 3 forming the outer side wall of the filter unit 2 are contacted with the inner side wall of the outer cladding 1;

the bulked yarn 3 comprises a high-shrinkage core yarn 31 and a low-shrinkage outer yarn 32, the number of the core yarn 31 and the number of the outer yarns 32 are at least one, the core yarn 31 is positioned in the middle of the bulked yarn 3, the outer yarn 32 is wound outside the core yarn 31, the outer yarn 32 presents a plurality of coils 33 which are connected in sequence along the core yarn 31, and the diameter of each coil 33 is larger than that of the core yarn 31.

The coil 33 comprises a loop side strip 332 and loop high points 331 and loop low points 333 connected with two ends of the loop side strip, the loop high points 331 and the loop low points 333 are respectively positioned above and below the core yarn 31, and the arrangement structures of the loop high points 331 and the loop low points 333 are any one of the following:

at least one of the loop high points 331 and the loop low points 333 is in contact with the outer periphery of the core yarn 31;

the loop high points 331 and the loop low points 333 are both arranged far away from the core yarn 31, a high loop gap 334 is formed between the loop high points 331 and the core yarn 31, and a low loop gap 335 is formed between the loop low points 333 and the core yarn 31.

In the bulked yarn 3, loop gaps 34 are provided between adjacent loops 33.

In two adjacent bulked yarns 3, the loops 33 on the other bulked yarn 3 are inserted into at least one loop gap 34 on one bulked yarn 3, and the number of the loops 33 inserted into a single loop gap 34 is at least one (that is, the loop gaps 34 and the loops 33 are inserted into each other).

In the bulked yarn 3, the outer yarn 32 is annularly wound outside the core yarn 31 in a spiral structure, and the rings in the spiral structure are coils 33.

The arrangement structure of all the bulked yarns 3 in the filter unit 2 is any one of the following structures:

all the bulked yarns 3 are stacked side by side, and the direction of each bulked yarn 3 from head to tail is consistent with the direction of smoke;

all the bulked yarns 3 are twisted or woven into a yarn rod 4, and the direction of the yarn rod 4 from head to tail is consistent with the direction of the smoke.

The filtering unit 2 comprises at least two subunits 21, and the direction of all the subunits 21 from head to tail is consistent with the direction of the smoke; the subunit 21 comprises at least two bulked yarns 3, and the arrangement structure of all the bulked yarns 3 in a single subunit 21 is any one of the following:

all the bulked yarns 3 are stacked side by side, and the direction of each bulked yarn 3 from head to tail is consistent with the direction of smoke;

all the bulked yarns 3 are twisted or woven into a sub-yarn rod 22, and the head-to-tail direction of the sub-yarn rod 22 is consistent with the direction of the smoke.

The filter unit 2 comprises at least one winding rod 5, the trend of the winding rod 5 from head to tail is consistent with the trend of smoke, the winding rod 5 is formed by winding middle cloth 51, and the middle cloth 51 is formed by weaving a plurality of bulked yarns 3.

The filter unit 2 comprises a plurality of folded filter sheets 6, the length of a single filter sheet 6 is less than or equal to the length of the filter unit 2, and the filter sheet 6 is woven by a plurality of bulked yarns 3.

The filter also comprises a plurality of side wire inlets 7, and the arrangement structure of the side wire inlets 7 is any one or any combination of the following structures:

one end of the single side wire inlet 7 is connected with the inner side wall of the outer cladding layer 1, and the other end of the single side wire inlet 7 is positioned inside the filtering unit 2;

one end of the single side wire inlet 7 is connected with the inner side wall of the outer cladding layer 1, and the other end of the single side wire inlet 7 is connected with the inner side wall of the outer cladding layer 1 after penetrating through the filtering unit 2 or contacting with the filtering unit 2;

one end of the single side inlet wire 7 is connected with the inner side wall of the outer cladding layer 1, and the other end of the single side inlet wire 7 is in contact with the outer side wall of the filter unit 2.

The principle of the invention is illustrated as follows:

the bulked yarn in the invention refers to: the method comprises the steps of firstly mixing two kinds of fibers with different shrinkage rates to form a yarn, then placing the yarn in steam or hot air or boiling water for treatment, wherein the fiber with high shrinkage rate has larger shrinkage and is positioned in the center of the yarn (namely the core yarn 31), and the mixed low shrinkage fiber (namely the outer yarn 32) is extruded due to the shrinkage and forms a loop shape (namely a loop 33) on the surface of the yarn, so that the bulked yarn with a fluffy, full and elastic structure is formed.

The material of the side threading 7 in the present invention is preferably PLA (polylactic acid), and the process of installing the side threading 7 is preferably: firstly, a plurality of side inlet filaments 7 are implanted on the unfolded and tiled outer cladding 1 in an electrostatic flocking mode, then the filter unit 2 is placed on the tiled outer cladding 1, and then the outer cladding 1 is rolled up to wrap the filter unit 2 in the outer cladding 1 to form a filter tip, or after wrapping, the filter tip is cut for a plurality of times to obtain a plurality of filter tips.

The "smoke direction" in the present invention refers to the overall direction of smoke flow in a smoking article, that is, the overall direction of smoke flow from the location where smoke is generated to the tip filter, when the smoker uses the smoking article.

Example 1:

referring to fig. 1 and 2, a filter containing bulked yarn comprises an outer wrap 1 and a filter unit 2 wrapped inside the outer wrap; the filter unit 2 comprises at least two bulked yarns 3, the direction of the filter unit 2 from head to tail is consistent with the direction of smoke, the adjacent bulked yarns 3 are contacted with each other, and the outer side part of the bulked yarn 3 forming the outer side wall of the filter unit 2 is contacted with the inner side wall of the outer cladding 1; the bulked yarn 3 comprises a high-shrinkage core yarn 31 and a low-shrinkage outer yarn 32, the number of the core yarn 31 and the number of the outer yarns 32 are at least one, the core yarn 31 is positioned in the middle of the bulked yarn 3, the outer yarn 32 is wound outside the core yarn 31, the outer yarn 32 presents a plurality of coils 33 which are connected in sequence along the core yarn 31, and the diameter of each coil 33 is larger than that of the core yarn 31.

Example 2:

the basic contents are the same as example 1, except that:

referring to fig. 1 and 2, each coil 33 includes a loop side strip 332 and loop high points 331 and loop low points 333 connected to two ends of the loop side strip, the loop high points 331 and the loop low points 333 are respectively located above and below the core yarn 31, and the arrangement structure of the loop high points 331 and the loop low points 333 is any one of the following:

one or both of the loop high points 331 and the loop low points 333 are in contact with the outer periphery of the core yarn 31;

the circle high point 331 and the circle low point 333 are both far away from the core yarn 31, at this time, the circle high point 331 and the circle low point 333 are not in contact with the outside circumference of the core yarn 31, a high circle gap 334 is clamped between the circle high point 331 and the core yarn 31, a low circle gap 335 is clamped between the circle low point 333 and the core yarn 31, when the smoke filtering device is applied, the high circle gap 334 and the low circle gap 335 can increase the fluffiness degree and provide the support force for outward expansion, the internal space of the filtering unit 2 can be enriched by the high circle gap 334 and the low circle gap 335, and the circulation path of smoke is prolonged.

Example 3:

the basic contents are the same as example 1, except that:

referring to fig. 1 and 2, in two adjacent bulked yarns 3, the loops 33 on the other bulked yarn 3 are inserted into at least one loop gap 34 on one bulked yarn 3, and the number of the loops 33 inserted into a single loop gap 34 is at least one (that is, the loop gaps 34 and the loops 33 are inserted in opposite directions).

In practical applications, it is not limited that the coil 33 is inserted into each of the turn gaps 34, nor is it limited that the coil 33 is inserted into the turn gaps 34.

Example 4:

the basic contents are the same as example 1, except that:

referring to fig. 3, the arrangement of all the bulked yarns 3 in the filter unit 2 is: all the bulked yarns 3 are stacked side by side (three bulked yarns 3 are provided in total), and the direction of each bulked yarn 3 from head to tail is consistent with the direction of smoke.

Example 5:

the basic contents are the same as example 1, except that:

referring to fig. 4, the arrangement of all the bulked yarns 3 in the filter unit 2 is: all the bulked yarns 3 are twisted or woven into a yarn rod 4 (the two bulked yarns 3 are twisted into the yarn rod 4), and the direction of the yarn rod 4 from head to tail is consistent with the direction of smoke.

Example 6:

the basic contents are the same as example 1, except that:

referring to fig. 5, which is a schematic cross-sectional view of the filter unit 2, one filter unit 2 includes three sub-units 21, and the direction of each sub-unit 21 from head to tail is consistent with the direction of the smoke. Wherein, the three subunits 21 have different structures, which are respectively:

two bulked yarns 3 are stacked side by side, and the direction of each bulked yarn 3 from head to tail is consistent with the direction of smoke;

the two bulked yarns 3 are twisted into a sub-yarn rod 22, and the direction of the sub-yarn rod 22 from head to tail is consistent with the direction of smoke;

the three bulked yarns 3 are mutually twisted into a sub-yarn rod 22, and the direction of the sub-yarn rod 22 from head to tail is consistent with the direction of the smoke.

Further, as for the structure in which the bulky yarns 3 are stacked side by side, a comparative experiment is performed as follows, in the present example, the structure in which the bulky yarns 3 are stacked side by side is different only in the number of the bulky yarns 3, and as is clear from comparison between the present example and the conventional acetate filter rod (core portion in the filter), the present design can obtain the application effects matching the conventional acetate filter rod in terms of suction resistance (reflection of pressure drop) and filtration efficiency (reflection of adsorption capacity).

。

Example 7:

the basic contents are the same as example 1, except that:

referring to fig. 6, the filter unit 2 comprises at least one winding rod 5 (fig. 6 is a schematic cross-sectional view of the winding rod 5), the winding rod 5 has a head-to-tail direction consistent with the smoke direction, the winding rod 5 is formed by winding an intermediate cloth 51, and the intermediate cloth 51 is a planar structure woven by a plurality of bulked yarns 3.

Example 8:

the basic contents are the same as example 1, except that:

referring to fig. 7, which is a schematic cross-sectional view of a filter unit 2, it can be seen that the filter unit 2 is filled with three folded filter sheets 6, the length of a single filter sheet 6 is less than or equal to the length of the filter unit 2, and the filter sheets 6 are all woven from a plurality of bulked yarns 3.

Example 9:

the basic contents are the same as example 1, except that:

referring to fig. 8, the filter further comprises a plurality of side-in wires 7, and the arrangement structure of the side-in wires 7 is any one or any combination of the following:

one end of the single side wire inlet 7 is connected with the inner side wall of the outer cladding layer 1, and the other end of the single side wire inlet 7 is positioned inside the filtering unit 2;

one end of the single side wire inlet 7 is connected with the inner side wall of the outer cladding layer 1, and the other end of the single side wire inlet 7 is connected with the inner side wall of the outer cladding layer 1 after penetrating through the filtering unit 2 or contacting with the filtering unit 2;

one end of the single side inlet wire 7 is connected with the inner side wall of the outer cladding layer 1, and the other end of the single side inlet wire 7 is in contact with the outer side wall of the filter unit 2.

Referring to fig. 9, the side entry filaments 7 are preferably arranged by: the mode that goes into silk 7 earlier through the static flocking of side is planted on the surrounding layer 1 of tiling (also can be with going into silk 7 of side through the mode of bonding, bond on the surrounding layer 1 of tiling), again wrap up surrounding layer 1 on filter unit 2 to make the silk 7 of going into of side contact or be connected with filter unit 2, and simultaneously, surrounding layer 1, filter unit 2's length is unlimited, both can be a filter tip just after the parcel, also can cut into many sections with the gained thing after the parcel, each section is as a filter tip.

The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiment, but equivalent modifications or changes made by those skilled in the art according to the present disclosure should be included in the scope of the present invention as set forth in the appended claims.

Claims (10)

1. A filter tip containing bulked yarn, comprising an outer wrapper (1) and a filtering unit (2) wrapped inside it, characterized in that:

the filter unit (2) comprises at least two bulked yarns (3), the trend of the filter unit (2) from head to tail is consistent with the trend of smoke, the adjacent bulked yarns (3) are contacted with each other, and the outer side part of the bulked yarn (3) forming the outer side wall of the filter unit (2) is contacted with the inner side wall of the outer cladding (1);

the bulked yarn (3) comprises a high-shrinkage core yarn (31) and a low-shrinkage outer yarn (32), the number of the core yarn (31) and the number of the outer yarn (32) are at least one, the core yarn (31) is located in the middle of the bulked yarn (3) where the core yarn is located, the outer yarn (32) is wound outside the core yarn (31), the outer yarn (32) is sequentially connected with a plurality of coils (33) along the core yarn (31), and the diameter of the single coil (33) is larger than that of the core yarn (31).

2. A filter containing a bulked yarn according to claim 1 wherein: the coil (33) comprises a loop side strip (332) and loop high points (331) and loop low points (333) connected with two ends of the loop side strip, the loop high points (331) and the loop low points (333) are respectively located above and below the core yarn (31), and the arrangement structures of the loop high points (331) and the loop low points (333) are any one of the following:

at least one point of the circle high point (331) and the circle low point (333) is contacted with the outer side circumference of the core yarn (31);

the loop high points (331) and the loop low points (333) are both far away from the core yarn (31), a high loop gap (334) is formed between the loop high points (331) and the core yarn (31), and a low loop gap (335) is formed between the loop low points (333) and the core yarn (31).

3. A filter containing a bulked yarn according to claim 1 or 2 wherein: in the bulked yarn (3), a loop gap (34) is formed between adjacent loops (33).

4. A filter containing a bulked yarn according to claim 3 wherein: in two adjacent bulked yarns (3), a coil (33) on the other bulked yarn (3) is inserted into at least one coil gap (34) on one bulked yarn (3), and the number of the coils (33) inserted into the single coil gap (34) is at least one.

5. A filter comprising bulked yarn according to claim 1 or 2 wherein: in the bulked yarn (3), the outer yarn (32) is wound outside the core yarn (31) in a spiral structure in a ring-shaped mode, and the ring in the spiral structure is a coil (33).

6. A filter containing a bulked yarn according to claim 1 or 2 wherein: the arrangement structure of all bulked yarns (3) in the filter unit (2) is any one of the following structures:

all the bulked yarns (3) are stacked side by side, and the direction of each bulked yarn (3) from head to tail is consistent with the direction of smoke;

all the bulked yarns (3) are twisted or woven into a yarn rod (4), and the direction of the yarn rod (4) from head to tail is consistent with the direction of the smoke.

7. A filter containing a bulked yarn according to claim 1 or 2 wherein: the filter unit (2) comprises at least two subunits (21), and the direction of all the subunits (21) from head to tail is consistent with the direction of the smoke; the sub-unit (21) comprises at least two bulked yarns (3), and the arrangement structure of all the bulked yarns (3) in a single sub-unit (21) is any one of the following:

all the bulked yarns (3) are stacked side by side, and the direction of each bulked yarn (3) from head to tail is consistent with the direction of smoke;

all the bulked yarns (3) are twisted or woven into a sub-yarn rod (22), and the direction of the sub-yarn rod (22) from head to tail is consistent with the direction of smoke.

8. A filter containing a bulked yarn according to claim 1 or 2 wherein: the filter unit (2) comprises at least one rolling rod (5), the trend of the rolling rod (5) from head to tail is consistent with the trend of smoke, the rolling rod (5) is formed by winding middle cloth (51), and the middle cloth (51) is formed by weaving a plurality of bulked yarns (3).

9. A filter containing a bulked yarn according to claim 1 or 2 wherein: the filter unit (2) comprises a plurality of folded filter sheets (6), the length of a single filter sheet (6) is smaller than or equal to that of the filter unit (2), and the filter sheets (6) are woven by a plurality of bulked yarns (3).

10. A filter containing a bulked yarn according to claim 1 or 2 wherein: the filter also comprises a plurality of side wire inlets (7), and the arrangement structure of the side wire inlets (7) is any one or any combination of the following structures:

one end of the single side wire inlet (7) is connected with the inner side wall of the outer cladding layer (1), and the other end of the single side wire inlet (7) is positioned inside the filtering unit (2);

one end of the single side wire inlet (7) is connected with the inner side wall of the outer cladding (1), and the other end of the single side wire inlet (7) is connected with the inner side wall of the outer cladding (1) after penetrating through the filtering unit (2) or contacting with the filtering unit (2);

one end of the single side wire inlet (7) is connected with the inner side wall of the outer cladding layer (1), and the other end of the single side wire inlet (7) is in contact with the outer side wall of the filter unit (2).

Images