Functional filter stick based on double-layer paper hollow pipe

Abstract

The utility model belongs to the technical field of special filter sticks, and particularly relates to a functional filter stick based on a double-layer paper hollow pipe and a preparation method of the functional filter stick, and the functional filter stick comprises the double-layer paper hollow pipe and a functional material column arranged in the double-layer paper hollow pipe; the double-layer paper blank pipe is formed by overlapping and bonding two layers of forming paper parts, and then rolling and bonding non-overlapping parts through a forming cigarette gun, so as to form the paper blank pipe which is completely wrapped and has no step at a lap joint; the functional material columns are made of plant fibers or polylactic acid materials. The functional filter stick with the double-layer paper hollow pipe and the preparation method of the functional filter stick are simple, the filter stick is integrally formed, the filter stick is green and degradable, various functions can be endowed, and the functional filter stick can be directly used for cigarettes or used for cigarettes after being compounded.

Description

Technical Field

[0001] This invention belongs to the field of special filter rod technology, specifically relating to a functional filter rod based on a double-layer paper hollow tube and its preparation method. Background Technology

[0002] Currently, almost all cigarettes on the domestic market are filter cigarettes. Filters can filter out harmful and toxic gases and substances in cigarettes to a certain extent. The main material of the filter is usually cellulose diacetate tow, which has good adsorption effect, but its functionality is relatively limited and its degradation performance is poor.

[0003] The applicant claims protection for a countersunk filter tip, cigarette, and preparation method in CN202210005757.4, which achieves efficient and high-quality countersunk filter rod preparation. However, its function is mainly focused on reducing tow consumption and differentiating appearance, resulting in relatively limited functionality and restricting product variety. Therefore, based on the parallel winding of the double-layer forming paper into an empty tube, the applicant uses other filling materials to prepare the filter rod, enriching its functionality while meeting the requirements for green and biodegradable materials. Summary of the Invention

[0004] The purpose of this invention is to provide a functional filter rod based on a double-layer paper hollow tube and its preparation method, so as to solve the problems existing in the background mentioned above.

[0005] To achieve the above objectives, this application employs the following technical solution:

[0006] A functional filter rod based on a double-layer paper hollow tube includes a double-layer paper hollow tube and a functional material column disposed inside the double-layer paper hollow tube.

[0007] The double-layer paper tube is made by overlapping and bonding two layers of shaped paper, and then rolling and bonding the non-overlapping parts by a forming smoke gun to form a completely wrapped paper tube with no steps at the joint.

[0008] The functional material column is made of plant fiber or polylactic acid.

[0009] Furthermore, the forming paper of the double-layer paper tube is one of ordinary forming paper, oil-resistant forming paper, fragrance-carrying forming paper, or transparent forming paper.

[0010] Furthermore, the forming paper is a high-grammage forming paper, greater than or equal to 60 g / m2.

[0011] Furthermore, the filling amount of the functional material column is 2-10 g / m.

[0012] Furthermore, the plant fibers include, but are not limited to, starch-based, cellulose, and lignin-based materials capable of expansion and foaming.

[0013] A method for preparing a functional filter rod based on a double-layer paper hollow tube comprises the following steps:

[0014] S1. The two layers of forming paper are partially overlapped and bonded to form an incomplete paper tube, which is then transferred to the forming unit.

[0015] S2. The extrusion module of the functional material filling device contains a uniformly mixed functional material raw material, which is then formed into expandable granules.

[0016] S3. The expandable granules prepared by the extrusion module are transferred and filled into the injection molding module through the transfer channel;

[0017] S4. Set the process parameters of the injection molding module and extrude the functional material evenly onto the partially wrapped paper tube through the injection molding channel.

[0018] S5. The forming unit bonds the non-overlapping parts of the paper tube that is not fully wrapped to form a functional filter strip that is fully wrapped and has no steps at the joint. Then, the forming unit cuts the functional filter strip into functional filter rods of uniform length through the cutting unit.

[0019] Furthermore, the functional material filling device includes an extrusion module and an injection module, the extrusion module and the injection module are connected by a transmission channel, and the outlet of the injection module is connected to an injection channel.

[0020] Furthermore, the pressure during the injection molding process is 2-15 MPa.

[0021] Furthermore, the injection molding channel is combined with the fragrance thread and gel addition device.

[0022] The beneficial effects of this invention are:

[0023] This technical solution provides a functional filter rod based on a double-layer paper hollow tube and its preparation method is simple and integrally formed. The filter rod is green and biodegradable, can be endowed with a variety of functions, and can be used directly or in combination with other materials in cigarettes. Attached Figure Description

[0024] Figure 1 This is a schematic diagram illustrating the manufacturing process of the functional filter rod based on a double-layer paper hollow tube according to the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Incompletely wrapped paper tube; 2. Extrusion module; 3. Transfer channel; 4. Injection module; 5. Injection channel; 6. Molding unit. Detailed Implementation

[0027] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solution of the present invention, and should not be construed as limiting the technical solution of the present invention.

[0028] This application provides a functional filter rod based on a double-layer paper hollow tube, including a double-layer paper hollow tube and a functional material column disposed within the double-layer paper hollow tube. The double-layer paper hollow tube is formed by partially overlapping and bonding two layers of high-grammage forming paper, and then using a forming pipe to roll and bond the non-overlapping parts together, forming a completely wrapped paper hollow tube with no steps at the joint. The forming paper can be selected according to actual needs, such as ordinary forming paper, oil-resistant forming paper, fragrance-carrying forming paper, or transparent forming paper. Specifically, the two layers of high-grammage forming paper have the same thickness and are both elongated strips. Furthermore, the two layers of forming paper do not completely overlap during stacking; instead, they are aligned at both ends and staggered left and right. This ensures that one long side of each layer of forming paper does not coincide with the other layer, i.e., the partial overlap of this application.

[0029] In this technical solution, the high grammage forming paper is greater than or equal to 60 g / m2 to achieve better hardness and stiffness.

[0030] In this application, the functional material column is made of plant fiber or polylactic acid. Plant fiber includes, but is not limited to, starch-based, cellulose, and lignin materials capable of expansion and foaming.

[0031] like Figure 1 As shown, this application also provides a method for preparing a functional filter rod based on a double-layer paper hollow tube, comprising the following steps:

[0032] In the preparation method of this application, a functional material filling device is used in conjunction with the molding unit 6. The molding unit 6 is prior art, and the applicant will not describe it in detail here. Those skilled in the art can select existing molding units as needed.

[0033] The functional material filling device of this application includes an extrusion module 2 and an injection molding module 4. The extrusion module 2 and the injection molding module 4 are connected by a transfer channel 3, and the outlet of the injection molding module 4 is connected to an injection channel 5. Specifically, the uniformly mixed raw materials are first placed in the extrusion module to form expandable granules. Then, the granules are transferred and filled into the injection molding module. The process parameters are set, and the functional material is uniformly extruded through the injection channel. The injection process pressure is usually 2-15 MPa, and the filling amount of the functional material column is usually 2-10 g / m, depending on the material.

[0034] Simultaneously, it can be combined with existing fragrance thread, gel, and other additive devices at the injection molding channel to enrich the novelty, functionality, and aesthetics of the filter rod, enabling more functional filter rod products. The fragrance-carrying thread conveyed by the existing fragrance thread additive device at the injection molding channel enters the molding unit together, where it is wrapped and then cut.

[0035] The specific preparation method adopts the following steps:

[0036] S1. Two layers of forming paper are partially overlapped and bonded to form an empty paper tube 1 that is not fully wrapped, and then transferred to the forming unit 6. The specific device and conveying method for partially overlapping and bonding the two layers of forming paper are existing technologies, and the technical solution of this application does not involve protecting how to perform partial overlap and bonding. Therefore, the preparation method and related equipment for this part will not be described.

[0037] S2. The extrusion module 2 of the functional material filling device contains a uniformly mixed functional material raw material, which is then formed into expandable granules. The specific functional material raw material varies depending on the actual situation. The functional material raw material is such as the plant fiber or polylactic acid material mentioned above. The plant fiber includes, but is not limited to, starch-based, cellulose, and lignin materials that can expand and foam.

[0038] S3. The expandable granules prepared by the extrusion module 2 are transferred and filled into the injection molding module 4 through the transfer channel 3.

[0039] S4. Set the process parameters of the injection molding module, and uniformly extrude the functional material onto the partially wrapped paper tube 1 through the injection molding channel 5.

[0040] S5, the forming unit 6 glues the non-overlapping parts of the paper tube 1 that are not fully wrapped to form a functional filter strip that is fully wrapped and has no steps at the joint. Then, the functional filter strip is cut into functional filter rods of uniform length by the cutting unit of the forming unit.

[0041] Although the invention has been described herein with reference to illustrative embodiments thereof, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein.

Claims

1. A functional filter rod based on a double-layered paper hollow tube, characterized in that, It includes a double-layered paper hollow tube and a functional material column set inside the double-layered paper hollow tube; The double-layer paper tube is made by overlapping and bonding two layers of shaped paper, and then rolling and bonding the non-overlapping parts by a forming smoke gun to form a completely wrapped paper tube with no steps at the joint. The material of the functional material column is plant fiber or polylactic acid; The forming paper is a high basis weight forming paper, greater than or equal to 60 g / m2; The filling amount of functional material columns is 2-10 g / m.

2. The functional filter rod based on a double-layer paper hollow tube according to claim 1, characterized in that, The forming paper of the double-layer paper tube is one of ordinary forming paper, oil-resistant forming paper, fragrance-carrying forming paper, or transparent forming paper.

3. The functional filter rod based on a double-layer paper hollow tube according to claim 1, characterized in that, The plant fibers include, but are not limited to, starch-based, cellulose, and lignin materials that can expand and foam.

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