Non-woven fabric filtering device capable of improving hardness and aerosol generating product

Abstract

The invention discloses a non-woven fabric filtering device capable of improving hardness and an aerosol generating product, the non-woven fabric filtering device capable of improving hardness comprises a non-woven fabric base material and a non-woven fabric coating formed on at least one side surface of the non-woven fabric base material; the non-woven fabric coating is at least one of a glue substance, an ester substance or an inorganic metal complex. While the selective adsorption function of the non-woven fabric filter stick is reserved, the processing performance of the non-woven fabric filter stick can be improved, heat collapse caused by high-temperature aerosol passing through the non-woven fabric filter stick is reduced, and the experience of consumers in the aerosol generating product consumption process is better met.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of aerosol technology, in particular to a non-woven fabric filtering device with improved hardness and an aerosol generating article. BACKGROUND

[0002] In the art, it is known that aerosol generating articles can generate aerosol by external or internal heating, and the aerosol generated by heating passes through the filtering device for consumers to smoke.

[0003] During the use of this type of aerosol generating article, since the aerosol is generated by heating at a high temperature, and in order to meet the consumer experience, the length of the filtering device of the aerosol generating article should not be too long. Therefore, the filtering device of the aerosol generating article needs to be designed to reduce the temperature of the aerosol, while meeting the production and processing performance of the aerosol generating article, and not affecting the consumer experience. Generally, the filtering device of the aerosol generating article includes a support unit, a cooling unit and a filtering unit, in addition, the aerosol generating article also includes an aerosol generating substrate unit, so that the aerosol generating article generally includes at least four units. Due to the increase in structure, the production difficulty of the aerosol generating article is increased, further, the quality stability of the aerosol generating article is reduced, so that the quality instability causes the consumer smoking experience to be poor.

[0004] In order to reduce the number of structural units of the aerosol generating article, a high molecular material is generally used to form an integrated filtering structure, so that the aerosol generating article becomes composed of an aerosol generating substrate unit and an integrated filtering structure unit. However, in order to meet the consumer smoking experience, the above-mentioned integrated filtering structure unit generally has a complex structure design, which is difficult to produce, thereby causing the quality stability of the integrated filtering structure unit to be poor, further reducing the quality of the aerosol generating article and the consumer smoking experience. In addition, the aerosol generated by external or internal heating has a high temperature, and directly passes through the integrated filtering structure unit. The high molecular integrated filtering structure needs to be in direct contact with the consumer's oral cavity, and the aerosol with high temperature passing through the high molecular filtering structure will cause the high molecular material to collapse and deform plastically, especially the position close to the aerosol generating substrate unit and the high molecular filtering structure is more prone to deformation, thereby changing the flow rate of the aerosol in the filtering structure, causing the aerosol to be blocked by the deformed high molecular filtering unit, resulting in a decrease in the aerosol reaching the consumer's oral cavity during the second half of the smoking process, and reducing the consumer's smoking experience. Even worse, the aerosol with high temperature passing through the high molecular filtering unit will cause the high molecular material to deform and form gaps or holes between the high molecular material and the surrounding wrapper, thereby causing the high-temperature aerosol to directly enter the consumer's oral cavity, posing a risk of burns to the consumer. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a non-woven fabric filter device with improved hardness and an aerosol generating article, which can improve the processing performance of the non-woven fabric filter rod and reduce the heat collapse of the high-temperature aerosol passing through the non-woven fabric filter rod while retaining the selective adsorption function of the non-woven fabric filter rod, so as to better meet the experience of consumers in the process of consuming the aerosol generating article.

[0006] The technical problem to be solved by the present application is solved by the following technical scheme: The non-woven fabric filter device with improved hardness comprises a non-woven fabric substrate and a non-woven fabric coating formed on at least one side surface of the non-woven fabric substrate; the non-woven fabric coating is at least one of a gum substance, an ester substance or an inorganic metal complex.

[0007] Preferably, in the above technical scheme, the non-woven fabric substrate is composed of fibers with a length of 10-1000 μm, and the fibers are one or more of wood pulp fibers, sisal pulp fibers, diacetic acid wood pulp fibers and polymeric high molecular fibers.

[0008] Preferably, in the above technical scheme, the gum substance is at least one of gum arabic, guar gum, xanthan gum, peach gum or tragacanth gum; the ester substance is at least one of triacetin, phthalate compounds, fatty acid ester compounds, phosphate ester compounds or polymer esters; and the inorganic metal complex is at least one of metal carboxylate complex, silane coupling agent-metal ion complex or iron or copper porphyrin complex.

[0009] Preferably, in the above technical scheme, the non-woven fabric filter device is formed by spraying, coating or soaking the non-woven fabric coating on the non-woven fabric substrate, and the thickness of the formed non-woven fabric filter device is 10-100 μm.

[0010] Preferably, in the above technical scheme, the non-woven fabric filter device is prepared by the following method: (1) Dissolving the material for preparing the non-woven fabric coating in water, and the mass ratio of the material to water is 1:50; (2) Spraying, coating or soaking the material aqueous solution of step (1) uniformly on the non-woven fabric substrate, and the mass ratio of the material aqueous solution to the non-woven fabric substrate is 1:1; (3) Placing the non-woven fabric substrate sprayed, coated or soaked with the material aqueous solution on a flat plate heating device at 50℃ for 30 min to obtain the hardened non-woven fabric filter device.

[0011] Preferably, in the above technical solution, the non-woven fabric filtering device after hardening is folded, extruded and cut to form a strip-shaped filtering device; the length of the strip-shaped filtering device is 10-40mm, the diameter is 5-10mm, the pressure drop in the axial direction is 50-300Pa, and the hardness in the axial vertical direction is 75-95%.

[0012] Preferably, in the above technical solution, the hardness of the strip-shaped filtering device in the axial vertical direction decreases at a temperature of 200℃, and the hardness after the decrease is 65-90%.

[0013] An aerosol generating article, comprising: A strip-shaped filtering device formed by folding, extruding and cutting a non-woven fabric filtering device; An aerosol forming substrate located at one end of the strip-shaped filtering device, the aerosol forming substrate containing nicotine and atomized material; and An outer wrapping material coaxially splicing and wrapping the strip-shaped filtering device and the aerosol forming substrate into one body.

[0014] Preferably, in the above technical solution, the difference between the circumference of the strip-shaped filtering device and the circumference of the aerosol forming substrate is not more than 2mm.

[0015] Preferably, in the above technical solution, the length of the outer wrapping material is not more than the sum of the lengths of the strip-shaped filtering device and the aerosol forming substrate; the outer wrapping material is a papermaking method forming paper or an acetate fiber tow filter rod forming paper.

[0016] The above technical solution of the present application has the following beneficial effects: The present application provides a non-woven fabric filtering structure unit and an aerosol generating article with simple structure and small production difficulty. By improving the high temperature resistance of the non-woven fabric filtering structure, the deformation or thermal collapse of the non-woven fabric filtering unit during smoking can be effectively prevented, the number of structure units of the aerosol generating article is reduced, and the production quality stability of the aerosol generating article is improved while the smoking experience of consumers is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application.

[0018] Figure 1 It is a schematic diagram of the hardened non-woven fabric.

[0019] Figure 2 It is a schematic diagram of the aerosol generating article.

[0020] Figure 3This is a cross-sectional view of a hardened nonwoven filter device after folding, extrusion, and cutting. Detailed Implementation

[0021] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0022] Unless otherwise specified, the experimental methods used in the following examples are conventional methods, and the materials and reagents used are commercially available. Unless otherwise specified, the equipment used in the experiments is well known to those skilled in the art.

[0023] Example 1: Nonwoven Fabric Filter Device

[0024] like Figure 1 As shown, the hardened nonwoven filter device 1 includes a nonwoven substrate 11 and a nonwoven coating 12. The nonwoven substrate 11 is a diacetate fiber nonwoven substrate prepared by hydroentangling, with a width of 120 mm and a thickness of 30 μm. The nonwoven coating 12 is made of guar gum, with a thickness of 20 μm and a width of 118 mm. The overall thickness of the hardened nonwoven fabric is 50 μm.

[0025] Its preparation method is as follows: (1) Dissolve guar gum in water, with a weight ratio of guar gum:water = 1:50; (2) The guar gum aqueous solution is evenly coated onto the diacetate fiber nonwoven fabric. The coating amount is in the weight ratio of guar gum aqueous solution to diacetate fiber nonwoven fabric = 1:1. (3) After placing the diacetic acid fiber nonwoven fabric coated with guar gum aqueous solution on a flat heating device at 50°C for 30 minutes, the hardened nonwoven fabric filter device 1 can be prepared.

[0026] The above materials are for illustrative purposes only and are not limited to those materials.

[0027] Example 2 Aerosol-generated products

[0028] like Figure 2 As shown, the strip-shaped filter device 2 is made from the hardened non-woven fabric filter device 1, and its length is 33 mm. It is formed by folding and extruding the hardened non-woven fabric filter device 1 and then cutting it, with a cross-section as shown. Figure 3 As shown.

[0029] Figure 2The strip-shaped filter device 2 is cylindrical with a circumference of 22.2 mm and a pressure drop of 100 Pa. The strip-shaped filter device 2, the aerosol-forming matrix 4, and the external wrapping material 3 constitute the aerosol-generating product. The aerosol-forming matrix 4 contains nicotine and atomizing materials, has a length of 15 mm, a circumference of 22.1-22.3 mm, and a pressure drop of 150 Pa. The strip-shaped filter device 2 and the aerosol-forming matrix 4 are wrapped by the external wrapping material 3 to form the aerosol-generating product, which has a pressure drop of 250 Pa. The length of the external wrapping material 3 does not exceed the sum of the lengths of the aerosol-forming matrix 4 and the strip-shaped filter device 2. Furthermore, the external wrapping material 3 is a formed paper with certain strength, toughness, and heat resistance, such as paper formed by papermaking or cellulose acetate tow filter rod formed paper.

[0030] Although the present invention has been disclosed above with reference to embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various different choices and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention is defined by the claims and their equivalents.

Claims

1. A nonwoven filter device for improving hardness, characterized in that, It includes a nonwoven fabric substrate (11) and a nonwoven coating (12) formed on at least one side surface of the nonwoven fabric substrate (11); the nonwoven coating (12) is at least one of an adhesive, an ester, or an inorganic metal complex.

2. The nonwoven filter device for improving hardness according to claim 1, characterized in that, The nonwoven fabric substrate (11) is composed of fibers with a length of 10-1000μm, which are made of one or more of wood pulp fibers, sisal pulp fibers, diacetate wood pulp fibers and polymer fibers.

3. The nonwoven filter device for improving hardness according to claim 1, characterized in that, The gum is at least one of gum arabic, guar gum, xanthan gum, peach gum, or astragalus gum; the ester is at least one of triacetin, phthalic acid esters, fatty acid esters, phosphate esters, or polymer esters; and the inorganic metal complex is at least one of metal carboxylate complexes, silane coupling agent-metal ion complexes, or iron or copper porphyrin complexes.

4. The nonwoven filter device for improving hardness according to claim 1, characterized in that, The nonwoven filter device is formed by applying the nonwoven coating (12) to the nonwoven substrate (11) by spraying, coating or impregnation, and the thickness of the formed nonwoven filter device (1) is 10-100μm.

5. The nonwoven filter device for improving hardness according to claim 4, characterized in that, The nonwoven filter device is prepared by the following method: (1) Dissolve the material for preparing the nonwoven coating (12) in water, with a mass ratio of material to water of 1:50; (2) The aqueous solution of the material from step (1) is evenly sprayed, coated or impregnated onto the nonwoven fabric substrate (11), and the mass ratio of the aqueous solution to the nonwoven fabric substrate is 1:1; (3) After the non-woven fabric substrate that has been sprayed, coated or impregnated with the aqueous solution of the material is placed on a flat plate heating device at 50°C for 30 minutes, the hardened non-woven fabric filter device is obtained.

6. The nonwoven filter device for improving hardness according to any one of claims 1-5, characterized in that, The hardened nonwoven filter device (1) is folded, squeezed and cut to form a strip filter device (2); the strip filter device (2) has a length of 10-40mm, a diameter of 5-10mm, a pressure drop of 50-300Pa along the axial direction, and a hardness of 75-95% in the axial vertical direction.

7. The nonwoven filter device for improving hardness according to claim 6, characterized in that, The hardness of the strip filter device (2) decreases in the axial vertical direction at a temperature of 200℃, and the hardness after the decrease is 65-90%.

8. An aerosol-generating product, characterized in that, include: The nonwoven filter device (1) as claimed in any one of claims 6 or 7 is a strip filter device (2) formed by folding, squeezing and cutting. An aerosol forming matrix (4) is located at one end of the strip filter device (2), and the aerosol forming matrix (4) contains nicotine and atomizing materials; and The outer wrapping material (3) coaxially splices and wraps the strip filter device (2) and the aerosol forming matrix (4) into one unit.

9. The aerosol-generating product according to claim 8, characterized in that, The difference between the circumference of the strip filter device (2) and the circumference of the aerosol forming matrix (4) is no greater than 2 mm.

10. The aerosol-generating article according to claim 8, characterized in that, The length of the outer wrapping material (3) does not exceed the sum of the lengths of the strip filter device (2) and the aerosol forming matrix (4); the outer wrapping material (3) is paper formed by papermaking or cellulose acetate tow filter rod formed paper.

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