Moisture-proof and aroma-keeping inner tipping paper for cigarettes
By incorporating a drying element and an aroma storage element into the inner cardboard, the problem of cigarettes becoming damp and losing aroma in high humidity environments is solved, achieving structural stability and aroma preservation, and making it suitable for various cigarette box sizes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU DAYA NEW PACKAGING MATERIALS
- Filing Date
- 2025-07-24
- Publication Date
- 2026-06-05
AI Technical Summary
Existing cigarette inner cardboard cannot effectively prevent cigarettes from becoming damp and losing their aroma in high humidity environments, and its fit with the cigarette box is poor, which can easily cause the cigarettes to shake and deform under pressure.
An inner cardboard structure was designed, comprising a base paper, a limiting paper, an aroma storage component, and a drying component. The limiting paper forms a cavity for holding the cigarette, the drying component absorbs water vapor, and the aroma storage component releases aroma when the cigarette is drawn, ensuring structural stability and airtightness.
It effectively prevents cigarettes from getting damp, reduces the risk of mold, prolongs the aroma retention time, improves structural stability and adaptability, and is suitable for different cigarette box specifications.
Smart Images
Figure CN224324448U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of tobacco packaging materials, and relates to tobacco cardboard, specifically to a moisture-proof and aroma-preserving inner cardboard for cigarettes. Background Technology
[0002] The inner liner is a layer of paper between the cigarette pack and the cigarette. During use, it forms a cavity to protect the cigarette. Currently, most cigarette inner liners are of a single paper structure, serving only to support the cigarette and isolate it from the pack, without moisture-proof or aroma-preserving functions. In the humid environment of southern regions, when the pack is opened for an extended period, cigarettes are easily exposed to water vapor in the air, causing them to become damp and deteriorate, producing harmful substances. This presents a technical problem of cigarettes becoming damp after opening. According to actual measurements, in humid southern environments (humidity > 75%), after 48 hours of being left open, the moisture content of cigarettes exceeds 12%, increasing the risk of mold by five times. Simultaneously, the aroma of the cigarettes easily evaporates, severely affecting the smoking experience. Some existing inner liners only have a drying layer but lack aroma-preserving functions, or only rely on a fragrance coating for aroma preservation but lack moisture-proof design. However, the drying layer is prone to peeling off, and the fragrance evaporates quickly. Furthermore, traditional inner liners have poor adhesion to the cigarette and pack, easily causing the cigarette to shake and deform under pressure.
[0003] There is an urgent need to design an inner cardboard for cigarettes to protect the opened cigarettes, in order to prevent the cigarettes from getting damp and losing their aroma. Summary of the Invention
[0004] The purpose of this invention is to provide a moisture-proof and aroma-preserving inner cardboard for cigarettes, solving the problem of simultaneous moisture regain and aroma loss in cigarettes under high humidity conditions.
[0005] Technical solution
[0006] A moisture-proof and aroma-preserving inner cardboard for cigarettes, comprising:
[0007] The bottom paper has two sides adapted to contact the bottom of the cigarette box and the end of the cigarette;
[0008] Two limiting papers are adapted to contact the front of the cigarette box and the side of the cigarette; the ends of the two limiting papers are rotatably connected to the bottom paper so that when the two limiting papers are close together, they form a cigarette placement cavity with the bottom paper.
[0009] Aroma storage device, located inside the smoke outlet chamber;
[0010] The drying component is located inside the smoke outlet chamber.
[0011] In one optional embodiment, the limiting paper includes a positive limiting portion that contacts the base paper and a side limiting portion that is separate from the base paper;
[0012] The aroma storage component is connected to the base paper or the limiting paper; the drying component is connected to the base paper or the limiting paper.
[0013] In one alternative embodiment, the side limiting portion is symmetrical about the front limiting portion; the aroma storage component and the drying component are both disposed on the side of the front limiting portion away from the cigarette box.
[0014] In one optional embodiment, both the side limiting portion and the front limiting portion are sheet-like, and the angle between the side limiting portion and the front limiting portion is 30°-60°. If the angle is less than 30°, the cigarette release cavity is too narrow, and the cigarette is easily squeezed and deformed; if the angle is greater than 60°, the cavity is loose, and the drying / aroma storage component does not make sufficient contact with the cigarette, affecting the effect.
[0015] In one alternative embodiment, the aroma storage component comprises an outer PE / EVA composite film and an inner tobacco essential oil-ethanol mixture, the composite film rupturing upon compression or extraction of a cigarette to release the aroma. The PE layer provides a seal, while the EVA layer, containing a toughening agent (dioctyl adipate), ensures moderate brittleness, rupturing under 5-10N compressive force, thus preventing accidental breakage and reliably releasing the aroma during smoking.
[0016] Furthermore, the aroma storage device includes an outer thin film and an inner aroma, such that the aroma storage device is adapted to be squeezed or to break the film to release the aroma when the cigarette is smoked.
[0017] Furthermore, the aroma storage component is attached to the surface of the positive limiting part away from the cigarette box using hot melt adhesive (melting point 80-100℃). The adhesive layer thickness is 0.1-0.2mm, and the bonding strength is ≥2N / 15mm, ensuring that it can be detached or broken when the cigarette is taken out.
[0018] In one alternative embodiment, the drying element and the aroma storage element are staggered at the positive limiting portion.
[0019] In one optional embodiment, the bottom paper and the limiting paper are both laminated with aluminum foil on the side near the cigarette box; creases are pressed at the rotational connection points of the two limiting papers and the bottom paper, with a crease depth of 0.1-0.2mm. The creases penetrate part of the paper layer, and the pre-tear rate of the aluminum foil layer at the crease is 50-70%, ensuring that the limiting paper can rotate around the crease 30°-90° and can be rotated more than 50 times without tearing.
[0020] In one alternative implementation, the limiting paper is symmetrical about the base paper.
[0021] In one optional embodiment, the drying component includes a non-woven breathable packaging bag and internal drying particles; the drying component is fixed to a positive limiting part by an embedded connection, the positive limiting part being provided with a groove adapted to the drying component.
[0022] Furthermore, the drying component adopts an embedded connection: a groove with a depth of 0.3-0.5mm is preset in the positive limiting part. After the drying component is embedded in the groove, the edge is sealed with water-based adhesive (adhesive layer width 1-2mm) to ensure that the drying component does not fall off and the breathable packaging bag is not damaged.
[0023] Furthermore, the dried particles include silica gel, montmorillonite, or molecular sieves, etc. Silica gel has a moisture absorption of ≥30% and high chemical stability, and does not react with tobacco components; montmorillonite has low cost and is suitable for large-scale production.
[0024] In one optional embodiment, the drying element is rectangular, and the aroma storage element has a semi-circular or spherical cross-section; the thickness of the drying element is smaller than that of the aroma storage element. This ensures that the aroma storage element preferentially contacts the cigarette (by being crushed), while the drying element absorbs moisture only through breathable packaging, avoiding direct contact that could cause wear and tear on the cigarette.
[0025] The bottom paper is the same length as the inner length of the cigarette box (usually 85-100mm), and its width is 1 / 2-2 / 3 of the inner width of the cigarette box (usually 20-30mm). The length of the positioning paper is the same as the bottom paper, with a front positioning width of 5-10mm and a side positioning width of 15-25mm. The angle between the side and front positioning parts is 30°-60° (which can be shaped by folding the aluminum foil layer). The base material of the bottom paper and positioning paper has a basis weight of 180-250g / m³. 2 The food-grade kraft paperboard has a folding endurance of ≥100 times (MIT method) and a tensile strength of ≥5kN / m to ensure structural stability; the surface near the cigarette box is laminated with a food-grade aluminum foil with a thickness of 6-12μm. The aluminum foil is bonded to the substrate with a water-based polyurethane adhesive (solid content 30-40%), with a peel strength of ≥3N / 15mm to enhance barrier and sealing properties.
[0026] The aroma storage unit has a semi-circular cross-section with a radius of 3-5 mm or a spherical crown shape with a height of 3-5 mm and a length of 10-15 mm, distributed at intervals of 5-8 mm along the length of the positive limiting part. The materials of the aroma storage unit are as follows: the outer film is a 20-30 μm thick polyethylene (PE) / ethylene-vinyl acetate copolymer (EVA) composite film (PE layer thickness 15-20 μm, EVA layer thickness 5-10 μm), the EVA layer contains a toughening agent (such as dioctyl adipate, added at 5-8%) to ensure the film can rupture under 5-10 N of extrusion pressure; the internal aroma is a mixture of tobacco essential oil and ethanol (mass ratio 1:3-1:5), and each aroma storage unit has a capacity of 0.1-0.3 mL.
[0027] The drying unit has a rectangular structure, measuring 8-12mm in length, 5-8mm in width, and 0.5-1mm in thickness. It is staggered with the aroma storage unit, with the edge of the drying unit at least 3mm from the edge of the aroma storage unit to avoid mutual interference. The drying unit is made of a breathable packaging bag of 15-20μm thick non-woven fabric (20-30g / m²). 2 Air permeability 100-200mL / (cm) 2 The internal drying particles are silica gel desiccant with a particle size of 0.5-1mm (moisture content ≤5%, moisture absorption ≥30%), and the filling amount of each drying piece is 0.5-1g.
[0028] Beneficial effects
[0029] This invention utilizes a combination of a base paper, two limiting papers, an aroma storage component, and a drying component. By incorporating a drying component and an aroma storage component on the inner cardboard, the drying component absorbs water vapor entering the cigarette box, while the aroma storage component releases aroma when the cigarette is removed. This reduces the likelihood of the cigarette becoming damp and enhances its aroma. Excellent moisture resistance: The drying component continuously absorbs moisture, keeping the cigarette's moisture content within a safe range (≤10%) even in high humidity environments, significantly reducing the risk of mold. Significant aroma retention: The aroma storage component releases aroma in a targeted manner when the cigarette is removed, compensating for evaporation loss and extending the cigarette's flavor retention time. Stable and reliable structure: The rotating connection between the limiting paper and the base paper can withstand multiple openings and closings, the aluminum foil layer enhances barrier properties, and the component fixing method ensures that it will not fall off during use. Strong adaptability: The size can be adjusted according to different cigarette box specifications and is compatible with existing cigarette packaging processes. Attached Figure Description
[0030] Figure 1 A schematic diagram of the overall structure of a moisture-proof and aroma-preserving inner cardboard for cigarettes;
[0031] Figure 2 A schematic diagram of another integral structure of a moisture-proof and aroma-preserving inner cardboard for cigarettes;
[0032] In the diagram: 1. Base paper; 2. Limiting paper; 21. Side limiting part; 22. Front limiting part; 3. Smoke outlet chamber; 4. Aroma storage component; 5. Drying component. Detailed Implementation
[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0034] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0035] refer to Figures 1 to 2 At least one embodiment provides a moisture-proof and aroma-preserving inner cardboard for cigarettes, comprising: a bottom paper 1, two sides of which are adapted to contact the bottom of the cigarette box and the end of the cigarette, for isolating the cigarette and the cigarette box; two limiting papers 2, adapted to contact the front of the cigarette box and the side of the cigarette; the ends of the two limiting papers 2 are rotatably connected to the bottom paper 1 so that when the two limiting papers 2 are close together, they form a cigarette placement cavity 3 with the bottom paper 1 for holding the cigarette; an aroma storage component 4, located in the cigarette placement cavity 3, for releasing aroma; and a drying component 5, located in the cigarette placement cavity 3, for absorbing water vapor that enters after the cigarette box is opened, preventing the cigarette from becoming damp and deteriorating.
[0036] In some embodiments, the limiting paper 2 includes a positive limiting portion 22 that contacts the bottom paper 1 and a side limiting portion 21 that is separate from the bottom paper 1, which are used to cooperate with the bottom paper 1 to form a cigarette release cavity 3; the aroma storage component 4 is connected to the bottom paper 1 or the limiting paper 2 to ensure that the aroma storage component 4 is easily destroyed and releases aroma when the cigarette is drawn.
[0037] In some embodiments, the side limiting portion 21 is symmetrical about the front limiting portion 22; the aroma storage member 4 is disposed on the side of the front limiting portion 22 away from the cigarette box to prevent the cigarette box from damaging the aroma storage member 4.
[0038] In some embodiments, the side limiting portion 21 and the front limiting portion 22 are both sheet-like to reduce the space occupied; the aroma storage member 4 includes an outer thin film and an inner aroma, so that the aroma storage member 4 is suitable for being squeezed or for breaking the film to release the aroma when the cigarette is drawn, and the aroma contacts the cigarette to enhance its aroma.
[0039] In some embodiments, aluminum foil is provided on the surfaces of the bottom paper 1 and the limiting paper 2 near the cigarette box to facilitate folding of the limiting paper 2, so that the limiting paper 2 and the bottom paper 1 form a cigarette release cavity 3; the drying element 5 is connected to the bottom paper 1 or the limiting paper 2.
[0040] In some embodiments, the limiting paper 2 is symmetrical about the bottom paper 1; the drying element 5 is disposed on the side of the positive limiting part 22 away from the cigarette box to avoid friction with the cigarette box.
[0041] In some embodiments, the drying element 5 and the aroma storage element 4 are staggered in the positive limiting portion 22; the drying element 5 includes an outer breathable packaging bag and an inner drying granule for easy absorption of water vapor.
[0042] In some embodiments, the drying element 5 is specifically rectangular; the aroma storage element 4 has a semi-circular or spherical cross-section to ensure that the aroma storage element 4 closest to the cigarette is easily destroyed by the cigarette to release aroma; the thickness of the drying element 5 is smaller than the thickness of the aroma storage element 4 to avoid the drying element 5 from contacting the cigarette.
[0043] Base paper 1: 200g / m 2 Kraft paperboard, laminated with 8μm food-grade aluminum foil;
[0044] Limiting paper 2: 200g / m 2 Kraft paperboard, laminated with 8μm food-grade aluminum foil, with a positive limiting part 22 8mm wide and a side limiting part 21 20mm wide, forming an angle of 45° with the positive limiting part 22;
[0045] Aroma storage component 4: A PE / EVA composite film (25μm) encapsulates a tobacco essential oil-ethanol mixture (1:4), with a semi-circular cross-section (radius 4mm), a length of 12mm, and 6mm intervals, and is attached to the positive limiting part 22;
[0046] Drying component 5: Non-woven fabric packaged silicone granules (0.8mm in diameter), 10mm long, 6mm wide, and 0.8mm thick, embedded in the groove of the positive limiting part 22, and distributed alternately with the aroma storage component 4.
[0047] Assembly process: Fold the limiting paper 2 along the crease so that the two limiting parts 21 on both sides fit symmetrically and form a cigarette release cavity 3 with the bottom paper 1 (the cross-section is rectangular, 88mm long and 22mm wide); after the cigarette is inserted, the aluminum foil layer fits against the inner wall of the cigarette box, the drying part 5 absorbs the water vapor that enters, and the aroma storage part 4 is squeezed to release the aroma when the cigarette is taken out.
[0048] Working principle: Before using the inner cardboard for cigarettes, the two limiting papers 2 are brought close together. During this process, the side limiting parts 21 of the two limiting papers 2 also come close together, thereby forming a cigarette holder cavity 3 for placing cigarette paper between the bottom paper 1, the front limiting part 22, and the side limiting parts 21. Then, the inner cardboard is placed inside the cigarette box, and the cigarette is fully inserted into the cigarette holder cavity 3 inside the cigarette box, thus completing the cigarette box packaging. When the user starts to smoke a cigarette, the cigarette box is opened and the cigarette is taken out. During the extraction process, the side of the cigarette easily comes into contact with the cigarette gas storage component 4, which breaks the surface film and allows the aroma to be released into the cigarette box. When water vapor in the environment enters the cigarette box, it will be absorbed by the drying component 5.
[0049] While several embodiments are provided in this disclosure, it should be understood that the disclosed systems and methods may be embodied in many other specific forms without departing from the spirit or scope of this disclosure. The present examples are intended to be illustrative rather than restrictive and are not limited to the details given. For example, various elements or components may be combined or integrated into another system, or certain features may be omitted or not implemented.
Claims
1. A moisture-proof and aroma-preserving inner cardboard for cigarettes, characterized in that, include: The bottom paper (1) has two sides suitable for contacting the bottom of the cigarette box and the end of the cigarette; two limiting papers (2) are suitable for contacting the front of the cigarette box and the side of the cigarette; the ends of the two limiting papers (2) are rotatably connected to the bottom paper (1) so that when the two limiting papers (2) are close together, they form a cigarette placement cavity (3) with the bottom paper (1); an aroma storage component (4) is located in the cigarette placement cavity (3); and a drying component (5) is located in the cigarette placement cavity (3).
2. The moisture-proof and aroma-preserving inner cardboard for cigarettes according to claim 1, characterized in that: The limiting paper (2) includes a positive limiting part (22) that contacts the bottom paper (1) and a side limiting part (21) that is separated from the bottom paper (1); the aroma storage component (4) is connected to the bottom paper (1) or the limiting paper (2); the drying component (5) is connected to the bottom paper (1) or the limiting paper (2).
3. The moisture-proof and aroma-preserving inner cardboard for cigarettes according to claim 2, characterized in that: The side limiting part (21) is symmetrical about the front limiting part (22); the aroma storage part (4) and the drying part (5) are both located on the side of the front limiting part (22) away from the cigarette box.
4. The moisture-proof and aroma-preserving inner cardboard for cigarettes according to claim 3, characterized in that: Both the side limiting part (21) and the front limiting part (22) are sheet-like, and the angle between the side limiting part (21) and the front limiting part (22) is 30°-60°.
5. The moisture-proof and aroma-preserving inner cardboard for cigarettes according to claim 3, characterized in that: The drying element (5) and the aroma storage element (4) are staggered in the positive limiting part (22).
6. The moisture-proof and aroma-preserving inner cardboard for cigarettes according to claim 1, characterized in that: The aroma storage component (4) includes an outer PE / EVA composite film and an inner tobacco essential oil-ethanol mixture, which ruptures when the cigarette is squeezed or extracted to release the aroma.
7. The moisture-proof and aroma-preserving inner cardboard for cigarettes according to claim 1, characterized in that: The bottom paper (1) and the limiting paper (2) are both laminated with aluminum foil on the side close to the cigarette box; creases are pressed at the rotating connection between the two limiting papers (2) and the bottom paper (1), the crease depth is 0.1-0.2mm penetrating part of the paper layer, and the pre-breakage rate of the aluminum foil layer at the crease is 50-70%.
8. The moisture-proof and aroma-preserving inner cardboard for cigarettes according to claim 1, characterized in that: The limiting paper (2) is symmetrical about the bottom paper (1).
9. The moisture-proof and aroma-preserving inner cardboard for cigarettes according to claim 5, characterized in that: The drying component (5) includes a non-woven breathable packaging bag and internal drying particles; the drying component (5) is fixed to the positive limiting part (22) by an embedded connection, and the positive limiting part (22) is provided with a groove that is adapted to the drying component (5).
10. The moisture-proof and aroma-preserving inner cardboard for cigarettes according to claim 1, characterized in that: The drying element (5) is rectangular, and the aroma storage element (4) has a semi-circular or spherical cross-section; the thickness of the drying element (5) is smaller than the thickness of the aroma storage element (4).