Casing or packaging material

Abstract

The invention relates to a casing or packaging material for cigarettes, heat-not-burn products or tobacco products comprising a base paper (1) and a functional coating (2) of the base paper (1), characterised in that the base paper (1) comprises at least one fibre substitute material and the functional coating (2) is provided in quantities of 0.1 to 20 g / m2, wherein the base paper (1) contains wheat straw fibres and / or grass fibres from grass cuttings in a proportion of 5 to 40 wt.% and cellulose fibres in a proportion of 60 to 95 wt.%.

Description

[0001] Wrapping or packaging material

[0002] The invention relates to a wrapping or packaging material for cigarettes, heat-not-burn articles or tobacco products.

[0003] A cigarette and a heat-not-burn article each comprise an aerosol-generating substrate, for example in the form of a tobacco rod, and a filter. A cigarette and a heat-not-burn article each comprise a tipping paper, which is present at least in the region of the filter.

[0004] The CN 114875720 A an insert for a cigarette case, which contains Tencel fibers, softwood pulp fibers and tobacco fibers.

[0005] DE 102019100112 A1 concerns a segment of a smoking article, in the form of a filter or a cooling segment, wherein the segment is wrapped in a wrapping material. DE 102019100112 A1 lists possible sources for the cellulose fibers of the segment. Regarding the wrapping material, however, it is only stated that it can be made of paper.

[0006] CN112779818 (A) concerns a cigarette paper that wraps the tobacco rod. The cigarette paper contains, among other ingredients, 60-85 parts of superfine tobacco powder and 15-40 parts of cellulose fibers. Grass and straw are also mentioned in a list of numerous possible sources of cellulose fibers.

[0007] In a first variant, the invention relates to a tipping paper for cigarettes and heat-not-burn consumer articles or, in general, tipping papers for aerosol-generating consumer articles.

[0008] The tipping paper, often referred to as "tipping paper" or "tipping" for short, is the part of the aerosol-generating consumer article which comes into contact with the lips of the person when smoking a filter cigarette or when heating the heat-not-burn consumer article. The tipping paper surrounds the filter part and usually extends slightly in the lengthwise direction of the consumer article into the lengthwise area of ​​the tobacco rod or the aerosol-generating substrate, where it surrounds the cigarette paper or the wrapping material of the aerosol-generating substrate. The tipping paper forms the outermost wrapping material of an aerosol-generating consumer article and, unlike cigarette paper, is not burned when the consumer article is used.

[0009] The tipping paper is usually actually paper, but it can also be a foil or a composite material made up of several layers of different materials.

[0010] The mouthpiece tipping paper often has a print. For example, this print can resemble cork. However, mouthpiece tipping papers are also used that are white in the area touched by the lips.

[0011] In a second variant, the invention relates to a packaging material for cigarettes, heat-not-burn consumer goods or tobacco products. In particular, the second variant relates to an inner liner. The inner liner is the inner, flexible shell of a package consisting of several nested shells, whereby the shell surrounding the inner liner is usually made of a stiffer material. Pouches, filter sleeves and outer packaging can be designed with the invention as further packaging materials. A packaging material according to the invention can in particular replace a packaging material otherwise available as a plastic film.

[0012] What both variants have in common is that the starting material is a base paper containing fiber substitutes, which is then coated with a functional coating. A fiber substitute is a fiber material that is not obtained from wood, but from other plant sources. Preferably, the fiber substitute is grass fiber or straw fiber, especially wheat straw fiber. Other fiber substitutes such as hemp, flax, tobacco, and / or coconut fibers can also serve as a partial replacement for cellulose in the paper pulp.

[0013] The base paper preferably has a weight range of 20-300 g / m 2 preferably 30-60g / m 2 on.

[0014] The base paper preferably contains the following ingredients within the specified value range:

[0015] Fiber substitutes: 1 to 50 wt.%

[0016] Cellulose fibers: 50 to 99 wt.%

[0017] In a preferred embodiment, the fiber substitute comes from wheat straw and / or grass. Both materials are usually available regionally in sufficient quantities. They arise as a by-product or waste product from wheat production and grass clippings and can be used effectively as a component of the base paper. Wheat straw, in particular, creates a natural impregnation in the paper pulp against oils and waxes. Such impregnation is conventionally achieved by treatment with fluorine chemicals, so the natural impregnation provided by the fiber substitute, especially wheat straw, is environmentally friendly and sustainable.

[0018] Such impregnations are a good basis for further treatment with biodegradable functional coatings, which in combination create an improved barrier effect against water vapor, oxygen and moisture and / or oil.

[0019] The base paper preferably contains the following ingredients within the specified value range:

[0020] Wheat straw fibers and / or grass fibers: 5 to 40 wt.%

[0021] Cellulose fibers: 60 to 95 wt.%

[0022] Coating

[0023] The base paper already exhibits improved impregnation against oil and water due to the fiber substitutes, which is further improved according to the invention by a functional coating. The coating preferably achieves a KIT value of 5-12.

[0024] The functional coating is preferably applied in an amount of 0.1-20g / m 2 , preferably 3 - 10 g / m 2, upset.

[0025] Preferably, the functional coating contains only ingredients that come from renewable sources or have a natural or plant origin.

[0026] In one embodiment, the functional coating comprises a coating with polylactic acid (PLA).

[0027] In one embodiment, the functional coating comprises a coating with polyvinyl alcohol (PVA, PVOH).

[0028] In one version, the functional coating includes vegetable paraffins.

[0029] In one version, the functional coating includes plant-based dyes.

[0030] One version of the functional coating includes algae.

[0031] In one version, the functional coating includes nano-cellulose.

[0032] The functional coating includes nano-graphite in one version.

[0033] In one embodiment, the functional coating comprises ethylcellulose.

[0034] In one embodiment, the functional coating comprises a vegetable resin, in particular shellac.

[0035] The functional coating includes meerschaum (sepiolite) in one version.

[0036] In one embodiment, the functional coating comprises a plant protein, in particular an algal protein or fungal protein.

[0037] The functional coating preferably comprises the following ingredients in the specified range: Binder: 50-60 wt.%

[0038] Solvent and / or water: 40-50 wt.%

[0039] Functional material: 5 - 20% by weight

[0040] Oppression

[0041] The base paper provided with the functional coating can then be printed, whereby printing with known or conventional inks is possible.

[0042] In one variant according to the invention, printing is preferably carried out with plant-based or vegan inks. These inks do not contain any added microplastics or petroleum-based plastics or waxes. The solvent for these inks is preferably ethanol, especially recycled ethanol. These inks preferably contain only ingredients that come from renewable sources or are of natural or plant origin.

[0043] Ethylcellulose or shellac is preferred for printing. The printing may also contain ethylcellulose and shellac.

[0044] The printing preferably includes the following ingredients within the specified value range:

[0045] Talc: 0.1-5 wt.%

[0046] Pigments 0.1 - 50 wt.%

[0047] Ethylcellulose and / or shellac: 5 - 50 wt.%

[0048] Ethanol and / or water: 5-90 wt.%

[0049] In a preferred embodiment, the base paper comprises cellulose in the range of 70-80 wt.% and grass and / or wheat straw in the range of 20-30 wt.%. The grass and / or wheat straw is preferably provided with resins and binders. In one embodiment, the base paper is sized. In another embodiment, the base paper is unsized. In one embodiment, the functional coating comprises nanocellulose, which is embedded in a binder-solvent or water mixture, to close capillaries.

[0050] The functional coating can be applied in multiple layers. In one version, two coatings are applied with different solvents, preferably with a solvent-based coating followed by a water-based coating, or vice versa.

[0051] In one variant, the functional coating comprises nano-graphite or meerschaum. These can reduce pollutants in the smoke or vapor mixture. Preferably, the coating comprises plant resins, BLA, PVOH, ethyl cellulose, and / or plant paraffins to create dense layers and barriers against oils, fats, water vapor, oxygen, and flavors.

[0052] In one embodiment, the optional printing comprises a binder-solvent mixture or a binder-water mixture or a binder-solvent-water mixture based on PIA, PVOH, ethyl cellulose, and / or shellac and is provided with a pigmentation. The pigmentation preferably comprises pigments from plant components, in particular from turmeric, beetroot, spirulina, carrot, or algae.

[0053] The pigments are preferably food-grade. Lacquered or non-lacquered versions can be used.

[0054] The solids content of the optional printing, in particular in the form of a vegetable dye, is preferably between 10-30%, in particular between 15 and 25%.

[0055] The invention is illustrated by drawings:

[0056] Fig . 1 : illustrates a base paper with a functional coating .

[0057] Fig . 2 : illustrates a base paper with a functional

[0058] Coating when used on a filter cigarette . Fig . 3 : illustrates a base paper with a functional

[0059] Coating and additional printing.

[0060] Figure 1 illustrates a sectional view of a base paper 1 which is provided with a functional coating 2. As illustrated, the functional coating 2 can cover the entire surface of the base paper 1. In an embodiment variant not shown, the functional coating 2 can also be applied to only a partial area of ​​the base paper 1. Different partial areas of the base paper 1 can also be provided with different functional coatings 2. The functional coating 2 preferably forms a film on the surface of the base paper 1. Figure 2 illustrates a sectional view of the use of a base paper 1 with a functional coating 2 on a filter cigarette. The base paper 1 with a functional coating 2 can, however, generally be used as a wrapping or packaging material for cigarettes, heat-not-burn articles or tobacco products.In the case of a filter cigarette or a heat-not-burn article, the base paper 1 with functional coating 2 preferably surrounds the filter 3 of the filter cigarette or a heat-not-burn article, that is to say in particular that area which is touched by the lips of a user. The filter cigarette or the heat-not-burn article also has an aerosol-generating segment 4, which can be surrounded by a further wrapping material 5. In an embodiment variant not shown, the additional wrapping material 5 can also be formed from a physical base paper 1 with functional coating 2. A heat-not-burn article can, in addition to the filter 3 and the aerosol-generating segment 4, comprise further segments, such as a cooling segment and a hollow segment, wherein one or more of the further segments can be wrapped by the base paper 1 with functional coating 2 or by the wrapping material 5.The functional coating 2 is preferably present on the outside of the filter cigarette or the heat-not-burn article. The base paper 1 in question comprises at least one fiber substitute in the form of wheat straw fibers and / or grass fibers from grass clippings in a proportion of 5 to 40 wt. %, wherein the base paper 1 also contains cellulose fibers in a proportion of 60 to 95 wt. %. The functional coating in question is present in an amount of 0.1 to 20 g / m. 2 before .

[0061] Figure 3 illustrates in a sectional view a base paper 1 which is provided with a functional coating 2 and with a print 6. The base paper 1 and the functional coating 2 are present in a design variant as described for Figure 1. The print 6 can, as illustrated, cover the entire surface of the functional coating 2 on the base paper 1. In a design variant not shown, the print 6 can also be applied only to a partial area of ​​the base paper 1 or to a partial area of ​​the functional coating 2. Different partial areas of the base paper 1 can also be provided with different prints 6. The print 6 can be flat or in the form of lines, characters or patterns.

Claims

Patent claims 1. Wrapping or packaging material for cigarettes, heat-not-burn articles or tobacco products comprising a base paper (1) and a functional coating (2) of the base paper (1), characterized in that the base paper (1) comprises at least one fiber substitute and the functional coating (2) in an amount of 0.1 to 20 g / m 2 wherein the base paper (1) contains wheat straw fibres and / or grass fibres from grass cuttings in a proportion of 5 to 40 wt.% and cellulose fibres in a proportion of 60 to 95 wt.%.

2. Wrapping or packaging material according to claim 1, characterized in that the base paper (1) contains straw fibers.

3. Wrapping or packaging material according to claim 1, characterized in that the base paper (1) contains grass fibers.

4. Wrapping or packaging material according to claim 1, characterized in that the base paper (1) contains straw fibers and grass fibers.

5. Wrapping or packaging material according to one of claims 1 to 4, characterized in that the functional coating (2) contains only ingredients from renewable sources.

6. Wrapping or packaging material according to one of claims 1 to 5, characterized in that the functional coating (2) is applied in an amount of 3 to 10 g / m 2 is present.

7. Wrapping or packaging material according to one of claims 1 to 6, characterized in that there is a print (6) over the functional coating (2). Wrapping or packaging material according to claim 7, characterized in that the print (6) contains only ingredients from renewable sources. Wrapping or packaging material according to one of claims 7 to 8, characterized in that the print (6) is applied in an amount of 0.1 to 10 g / m 2 , preferably 0.5 to 5 g / m 2 , is present .

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