Hand-rolled cigarette paper with low-gram adhesive strips
By applying a wet-activated adhesive strip using flexographic or gravure printing during the production of hand-rolled cigarette paper, the issues of tearing and material loss are mitigated, enhancing productivity and reducing costs.
Patent Information
- Application Number
- JP2022531583
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2019-11-28
- Filing Date
- 2020-11-27
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2040-11-27
AI Technical Summary
The traditional production of hand-rolled cigarette paper is hindered by the application of adhesive strips, which often tears the paper, leading to material loss and process shutdowns, and results in suboptimal productivity due to low running speeds.
Applying a wet-activated adhesive strip to hand-rolled cigarette paper using flexographic, gravure, or indirect flexographic printing before or after cutting, allowing for precise application and higher production speeds.
This method reduces the risk of tearing during the adhesive application and cutting processes, enabling faster production rates and minimizing material loss, resulting in higher productivity and lower costs.
Abstract
Description
[Technical Field]
[0001] The present invention relates to a sheet of paper for roll-your-own cigarettes (RYO). [Background technology]
[0002] Sheets of hand-rolled cigarette paper are generally rectangular in shape with an adhesive strip applied, and have a basis weight of 8-10 g / m 2 The sheets are sold in booklets containing around 100 sheets. The user creates a cigarette by removing a sheet from the booklet, placing tobacco on the sheet, and then wetting an adhesive strip and applying it to the sheet.
[0003] Traditionally, sheets of hand-rolling cigarette paper are produced from a web of hand-rolling cigarette paper that is cut into the shape of a hand-rolling cigarette paper bobbin, the width of which is substantially the same as the width of the sheet. An adhesive strip is then applied to one of the two long machine direction sides of the hand-rolling cigarette paper bobbin, and the bobbin is then dried. The dried bobbin is then cut into sheets of hand-rolling cigarette paper.
[0004] The basis weight of cigarette paper for hand-rolled cigarettes is extremely low. Therefore, it may easily tear during the production of the sheet. The most problematic step is the application of the adhesive strip to the bobbin. In fact, this step has traditionally been carried out using a pressure nozzle, which can easily tear the bobbin, especially when the bobbin is less than 10 cm wide. Furthermore, the adhesive strip is deposited along one of the long sides of the bobbin, so that part of the adhesive strip may be deposited on the outside of the bobbin, resulting in a loss of material and resulting in insufficient adhesive strip to form the cigarette.
[0005] These problems have forced traditional processes for the production of hand-rolled cigarette paper to be shut down periodically. Furthermore, the running speed of the paper in these processes is around 55 m / s, which allows for optimization.
[0006] For these reasons, the productivity of these processes has been suboptimal.
[0007] Therefore, there is a need for an effective solution to improve productivity in the manufacturing process of sheets of hand-rolled cigarette paper.
[0008] It is therefore to the credit of the present inventors that they have discovered that this need can be met by applying a moisture-activated adhesive strip to a web or bobbin of hand-rolled cigarette paper using flexographic, gravure, or indirect flexographic printing. Summary of the Invention [Means for solving the problem]
[0009] That is, a first aspect of the present invention is a process for producing bobbins of hand-rolled cigarette paper having a wet-activated adhesive strip along one of their long sides, comprising the steps of: (a) cutting a web of hand-rolled cigarette paper to obtain bobbins of hand-rolled cigarette paper; and (b) applying a wet-activated adhesive strip to obtain hand-rolled cigarette paper having a wet-activated adhesive strip along one of their long sides, wherein the applying step of (b) is performed before or after the cutting step of (a), and the applying step of (b) is performed by flexographic printing, gravure printing, or indirect flexographic printing, and optionally followed by drying.
[0010] Unlike conventional processes using pressure nozzles, flexographic printing, gravure printing, and indirect flexographic printing, especially flexographic printing, are gentle methods that can significantly reduce the risk of tearing the web of hand-rolling paper during the application step (b). Therefore, the manufacturing process of the hand-rolling paper of the present invention does not require periodic shutdowns.
[0011] Furthermore, flexographic printing allows for extremely precise control over the definition of the wet-activated adhesive strip, thus advantageously minimizing the risk of tearing during the cutting step (a) when the cutting step (a) occurs after the applying step (b). Also, the bobbin can be cut more precisely, allowing for optimization to minimize material loss.
[0012] Flexographic, gravure, and indirect flexographic printing, especially flexographic printing, can be performed at web speeds four times or more faster than conventional processes.
[0013] For these reasons, the productivity in the manufacturing process of the hand-rolled cigarette paper sheet of the present invention is higher than that in the manufacturing process of conventional hand-rolled cigarette paper.
[0014] Another aspect of the present invention is a process for producing a sheet of hand-rolling cigarette paper, comprising the step of (c) cutting a bobbin of hand-rolling cigarette paper produced by the process for producing a bobbin of hand-rolling cigarette paper of the present invention.
[0015] Another aspect of the present invention is a process for producing a booklet of hand-rolling cigarette paper sheets, comprising the steps of (d2) forming a stack of hand-rolling cigarette paper bobbins produced by the process for producing hand-rolling cigarette paper bobbins of the present invention, and then (e) cutting the stack of bobbins.
[0016] The present process advantageously allows for the production of hand-rolled cigarette papers with wet-activated adhesive strips in bobbin or sheet form at higher productivity rates than conventional processes.
[0017] Additionally, the wet-activated adhesive strips on the wrapping paper in the form of bobbins or sheets may be 8-10 g / m 2 , i.e., has a basis weight equal to or less than that of conventional hand-rolled cigarette paper.
[0018] Therefore, another aspect of the present invention is a hand-rolled cigarette paper in the form of a bobbin or sheet, comprising a wet-activated adhesive strip, the wet-activated adhesive strip having a basis weight of 8 g / m 2 Below, especially 4g / m 2 ~7.5g / m 2 , especially 5g / m 2 ~7g / m 2 The characteristic is that it is between.
[0019] The adhesive strip of the hand-rolled cigarette paper of the present invention has a density of 8 to 10 g / m 2 Surprisingly, even though it has a basis weight below this, it exhibits the same level of adhesiveness as the adhesive strips in conventional hand-rolled cigarette papers.
[0020] Thus, the hand-rolling cigarette paper of the present invention may be used in the manufacture of cigarettes because it requires less moisture-activated adhesive and is advantageously cheaper to manufacture than conventional cigarette papers.
[0021] Another aspect of the present invention is a booklet of sheets of hand-rolled cigarette paper of the present invention.
[0022] Another aspect of the invention is a cigarette comprising a sheet of hand-rolled tobacco paper of the invention. DETAILED DESCRIPTION OF THE INVENTION
[0023] In one embodiment, the present invention relates to a process for producing bobbins of hand-rolled cigarette paper having a wet-activated adhesive strip along one of their long sides, comprising the steps of: (a) cutting a web of hand-rolled cigarette paper to obtain bobbins of hand-rolled cigarette paper; and (b) applying a wet-activated adhesive strip to obtain bobbins of hand-rolled cigarette paper having a wet-activated adhesive strip along one of their long sides, wherein the applying step of (b) occurs before or after the cutting step of (a), and the applying step of (b) is performed by flexographic printing, gravure printing, or indirect flexographic printing, followed by optional drying.
[0024] Within the meaning of the present invention, "roll-your-own cigarette paper" is to be understood as the paper used to roll cigarettes. Roll-your-own cigarette paper is made from wood pulp, tobacco fibers, hemp fibers, flax fibers, sisal fibers, cocoa shell fibers, cannabis fibers, rice straw, esparto fibers, and combinations thereof. Roll-your-own cigarette paper has a low basis weight and is thinner than commercially available cigarette paper. For example, the basis weight of the paper, measured outside the adhesive strip, is 10 g / m². 2 ~50g / m 2 , especially 12 g / m 2 ~25g / m 2 , especially 13 g / m 2 ~15g / m 2 The thickness of the wrapper paper may be 5 μm to 100 μm, particularly 10 μm to 60 μm, and especially 20 μm to 50 μm.
[0025] Within the meaning of the present invention, a "web of hand-rolled cigarette paper" is understood to mean the above-mentioned hand-rolled cigarette paper, the general shape of which, once unrolled, is a rectangle, the length of which is generally several tens or even thousands of meters, and the width of which is at least 0.6 m, in particular at least 1 m, in particular at least 1.2 m, or even at least 1.5 m.
[0026] In the sense of the present invention, a "bobbin of cigarette paper" is understood to mean the aforementioned cigarette paper, the general shape of which, when unfolded, is rectangular and provided with a moisture-activated adhesive strip along one of the long sides of the rectangle. The width of the rectangle is substantially equal to the width of the sheet of cigarette paper, i.e., approximately 30 mm to 75 mm, in particular 36 mm, 44 mm, or 53 mm. Typically, the length of the rectangle is several hundred to several thousand meters, for example, 1,000 m to 15,000 m, in particular 3,000 m to 10,000 m, and especially 5,000 m to 8,000 m. The length of the rectangle may also be one or several tens of meters, in which case the sheet is called a roll. The length of the rectangle may also be 1 meter or more, in which case the sheet is called a ream.
[0027] The wet-activated adhesive strip (also referred to as an adhesive strip) comprises a wet-activated adhesive.
[0028] In the sense of the present invention, a "wet-activated adhesive" is understood to mean a compound that becomes adhesive upon contact with water or moisture, such as saliva. The wet-activated adhesive may be any type of wet-activated adhesive known to those skilled in the art. For example, the wet-activated adhesive may be selected from sugar solutions, modified or unmodified polysaccharides, gums, and mixtures thereof, in particular gums.
[0029] Modified or unmodified polysaccharides include starch, alginate, dextrin, cyclodextrin, or mixtures thereof.
[0030] The gums may be of natural or synthetic origin, examples of naturally occurring gums include gum acacia, gum arabic, guar gum, karaya gum, pectin and mixtures thereof, especially guar gum, gum arabic and mixtures thereof, especially gum arabic.
[0031] The mass concentration of the wet-activated adhesive in the wet-activated adhesive strip of the bobbin of cigarette paper, not taking into account the cigarette paper, may be, for example, at least 95%, particularly at least 97%, more particularly 99% or even 100%.
[0032] The adhesive strip may also include additives to impart properties other than adhesiveness to the adhesive strip.
[0033] The additive may be, for example, a plasticizer, an antifoaming agent, a dye, an aromatic compound, or a mixture thereof, in particular a plasticizer, an antifoaming agent, or a mixture thereof.
[0034] Sorbitol is an example of a plasticizer that is contemplated for use in the context of the present invention.
[0035] Dyes include natural or artificial food colorings, particularly natural food colorings, such as caramel, chlorophyllin, paprika-derived colorings, beetroot-derived colorings, carotenes, turmeric-derived colorings, cochineal, annatto seed-derived colorings, lutein, sunflower-derived colorings, anthocyanins, malt-derived colorings, charcoal, and thermoluminescent colorings.
[0036] The aromatic compounds may be selected from glycosylated modified flavors, encapsulated flavors (cyclodextrin, membrane or matrix), natural flavors and mixtures thereof. The aromatic compounds may in particular be selected from EVG, emanate, synthetic or natural cannabidiol (CBD), synthetic or natural tetrahydrocannabinol (THC), terpenes and mixtures thereof.
[0037] Generally, the basis weight of the adhesive strip is 8 g / m², except for cigarette papers for hand-rolled cigarettes. 2 , especially 5.5g / m 2 ~7.5g / m 2 , especially 5g / m 2 ~6.5g / m 2 The following is the result.
[0038] The basis weight of the adhesive strip is the weight of 1 m of the bobbin of paper without the adhesive strip. 2 Weigh the mass of the section and measure the mass of the bobbin containing the adhesive strip. 2 The interval is determined by weighing and subtracting the two masses.
[0039] These weight values can be achieved by flexographic printing, gravure or indirect flexographic printing, in particular flexographic printing.
[0040] Therefore, bobbins made by the process of the present invention are less expensive than those made by prior art processes because less wet-activated adhesive is required.
[0041] Furthermore, the inventors have unexpectedly found that the adhesive strips on bobbins produced by the process of the present invention have the same degree of adhesion as the adhesive strips on bobbins produced by prior art processes.
[0042] Generally, the width of the adhesive strip is between 1 mm and 10 mm, in particular between 4 mm and 8 mm, especially between 5 mm and 7 mm.
[0043] The adhesive strip may have a continuous or discontinuous shape.
[0044] The continuous shape may be a straight line, a zigzag pattern, a crenellated pattern, or a wave pattern.
[0045] Examples of discontinuous shapes include discontinuous lines of geometric shapes, logos, or combinations thereof. The lines may be straight or curved.
[0046] Examples of geometric shapes include polygons, circles, ellipses, ovals, and combinations thereof. Polygons include triangles, squares, rectangles, or quadrilaterals such as rhombus, pentagons, hexagons, or octagons.
[0047] The logo may be that of the manufacturer of the rolling paper for the hand-rolled cigarettes.
[0048] The step (a) of cutting the web of cigarette paper for hand-rolled cigarettes is a conventional step known to those skilled in the art, and the cutting step (a) can result in one or more bobbins, for example, 2 to 100 bobbins, particularly 30 to 55 bobbins.
[0049] The cutting step (a) may be carried out at a running speed of the paper wrapper of, for example, 100 m / min or more, particularly 500 m / min or more, especially 750 m / min or more, and even 1000 m / min or more.
[0050] According to one embodiment, the applying step (b) is performed after the cutting step (a), in which case the applying step (b) is performed on at least one bobbin of hand-rolled cigarette paper resulting from step (a).
[0051] According to another embodiment, the applying step (b) is performed before the cutting step (a), in which case step (b) is performed on a web of hand-rolled cigarette paper to obtain a bonded web of cigarette paper, which is then cut during step (a).
[0052] According to another embodiment, multiple adhesive strips can be applied to a single web of hand-rolled cigarette paper, and then the adhesive web of paper can be cut to obtain multiple bobbins of paper.
[0053] Thus, one embodiment of the present invention is a process for producing n bobbins of hand-rolled cigarette paper, each bobbin of hand-rolled cigarette paper having an adhesive strip along one of its long sides, the process comprising: (b) applying n adhesive strips to a web of hand-rolled cigarette paper, wherein each of the n adhesive strips extends in the machine direction, to obtain a bonded web of cigarette paper; and (a) cutting the bonded web of cigarette paper in the machine direction along n-1 adhesive strips to obtain n bobbins of hand-rolled cigarette paper, wherein n is an integer greater than or equal to 2. The applying step (b) is characterized by being performed by flexographic printing, gravure printing, or indirect flexographic printing, and is then dried, if necessary.
[0054] This process is particularly efficient because it is more efficient to apply n strips of adhesive to a web of hand-rolling cigarette paper and then cut the web of hand-rolling cigarette paper into n bobbins of hand-rolling cigarette paper than to cut a single web of hand-rolling cigarette paper into the shapes of n bobbins of hand-rolling cigarette paper and apply a single strip to each of the n bobbins of hand-rolling cigarette paper.
[0055] According to one embodiment, n is an integer less than or equal to 100, in particular between 30 and 55.
[0056] For example, in the application step (b), the wrapping paper may be run at a speed of 70 m / min or more, particularly 100 m / min or more, especially 150 m / min or more, and even more especially 200 m / min or more.
[0057] According to one embodiment, the applying step (b) is carried out by flexographic printing, followed by drying if necessary.
[0058] Flexography is a relief printing process well known to those skilled in the art in which a flexible relief plate, called a plate, is impregnated with printing fluid and the printing fluid is applied to a substrate by bringing the substrate and the impregnated plate into contact with each other.
[0059] In the context of the present invention, flexographic printing advantageously brings a plate impregnated with a wet-activated adhesive printing fluid into contact with a web of hand-rolled cigarette paper so as to apply n adhesive strips to the web of hand-rolled cigarette paper.
[0060] Flexographic printing can be performed at paper running speeds four times faster than conventional processes, and the productivity of the process for manufacturing bobbins of cigarette paper for hand-rolling cigarettes of the present invention is thus higher than that of conventional processes.
[0061] One advantage of flexographic printing is the extremely precise control of the clarity of the adhesive strip's contour. Thus, the risk of tearing the cigarette paper during step (a) of cutting the adhesive web of cigarette paper to produce a hand-rolling cigarette bobbin with an adhesive strip along one of its long sides is advantageously minimized. It also allows for more precise cutting of the web, which can be optimized to minimize material loss. As a result, the productivity of the present process for producing a hand-rolling cigarette paper bobbin utilizing the flexographic coating step (b) is higher than that of conventional processes.
[0062] Other advantages of flexographic printing include simplified plates and reduced manufacturing costs.
[0063] Furthermore, flexography is a flexible method that allows for the shape of the adhesive strip to be obtained depending on the shape of the plate.
[0064] Furthermore, the tensile strength in both the machine direction and cross-machine direction of the bobbins produced after the coating step (a) performed by the flexographic printing press is greater than the tensile strength of bobbins produced by conventional processes. Therefore, the bobbins produced after the coating step (a) performed by the flexographic printing press can be readily used in subsequent steps of the bobbin manufacturing process of the present invention, such as cutting the bobbins into sheets or forming a stack of bobbins and then cutting the stack into stacks of sheets.
[0065] Adhesive solutions may be used for flexographic, gravure, and indirect flexographic printing.
[0066] The wet-activated adhesive solution (also referred to as adhesive solution) comprises a wet-activated adhesive, the mass concentration of which may be 30% to 60%, particularly 32% to 45%, or even 35% to 40%.
[0067] The adhesive solution is typically an aqueous solution. The wet-activated adhesive solution may further include additives such as those described above.
[0068] According to one embodiment, the adhesive solution may include a wet-activated adhesive solution, a plasticizer, and an antifoaming agent, wherein the wet-activated adhesive has a mass concentration of 30% to 50%, the plasticizer has a mass concentration of 0.1% to 0.5%, and the antifoaming agent has a mass concentration of 0.5% to 1%.
[0069] The optional drying step is a conventional drying step known to those skilled in the art, and therefore, they will know how to adapt it to the manufacturing process for the bobbins of hand-rolled cigarette paper of the present invention.
[0070] As noted above, the adhesive strip of bobbins produced by the process of the present invention has adhesive properties comparable to those of adhesive strips of bobbins produced by prior art processes, and therefore, bobbins produced by the process of the present invention can be cut into sheets of hand-rolling paper that are subsequently used to form hand-rolled cigarettes.
[0071] Accordingly, another aspect of the present invention is a process for producing a sheet of hand-rolled cigarette paper, comprising the step (c) of cutting a bobbin of hand-rolled cigarette paper produced by the process for producing a bobbin of hand-rolled cigarette paper of the present invention to produce a sheet of hand-rolled cigarette paper.
[0072] In the sense of the present invention, a "sheet of cigarette paper" is to be understood to mean a sheet of cigarette paper that is usually rectangular in shape and that is provided with an adhesive strip, as described above, along one of the longer sides of the rectangle. Typically, the length of the rectangle is between 70 mm and 110 mm, and the width may vary between 30 mm and 75 mm.
[0073] The step (c) of cutting the bobbin of hand-rolled cigarette paper is a conventional cutting step known to those skilled in the art, and therefore, they will know how to adapt it to the manufacturing process of the sheets of cigarette paper of the present invention.
[0074] Sheets of hand-rolled cigarette paper produced by the process of the present invention are sold in booklet form.
[0075] Therefore, the present invention also relates to a process for producing a booklet of hand-rolling cigarette paper sheets, comprising the step (d1) of forming a stack of hand-rolling cigarette paper sheets produced by the process for producing hand-rolling cigarette paper sheets of the present invention.
[0076] The forming step of (d1) may be carried out, for example, by stacking sheets of hand-rolling cigarette paper one on top of the other, or by inserting one sheet of hand-rolling cigarette paper between two sheets of hand-rolling cigarette paper.
[0077] For example, the forming step of (d1) may be carried out by inserting the sheet using an instrument sold by IMAtec, Luxembourg.
[0078] According to one embodiment, the stack of sheets formed after step (d1) may undergo an entanglement step to form an entangled stack of sheets.
[0079] The stack of sheets, whether intertwined or not, may then be introduced into a case.
[0080] Therefore, the present invention also relates to a process for producing a pack of hand-rolled cigarettes, comprising the step (d2) of forming a stack of hand-rolled cigarette paper bobbins produced by the process for producing hand-rolled cigarette paper bobbins of the present invention, followed by the step (e) of cutting the stack of bobbins.
[0081] The bobbin stack may be formed in step (d2) by unfolding the bobbins of hand-rolling paper and stacking the unfolded bobbins of hand-rolling paper one on top of the other, or by inserting one unfolded bobbin of hand-rolling paper between two unfolded bobbins of hand-rolling paper.
[0082] According to one embodiment, the stack of sheets formed in step (e) of cutting the stack of bobbins may undergo an entanglement step to form an entangled stack of sheets.
[0083] According to one embodiment, the stack of bobbins formed in step (d2) may undergo an entanglement step before the cutting step to form a stack of entangled sheets.
[0084] The stack of sheets, whether intertwined or not, may then be introduced into a case.
[0085] As explained above, the paper for hand-rolled cigarettes, either in bobbin or sheet form, is provided with an adhesive strip and has a basis weight of 8-9 g / m , which is a conventional basis weight. 2 Advantageously smaller than.
[0086] The present invention therefore also relates to a bobbin or sheet of hand-rolling paper provided with an adhesive strip as described above in connection with the manufacturing process of the bobbin of hand-rolling paper according to the invention.
[0087] Advantageously, the hand-rolling papers of the present invention are less expensive than hand-rolling papers made by prior art processes because they require less moisture-activated adhesive.
[0088] Furthermore, the inventors have unexpectedly found that the adhesive strips in the hand-rolling cigarette papers of the present invention have adhesive properties comparable to those of adhesive strips in hand-rolling cigarette papers produced by prior art processes.
[0089] The hand-rolling cigarette paper and hand-rolling cigarette paper adhesive strip are as described above in connection with the manufacturing process for the hand-rolling cigarette paper bobbin of the present invention.
[0090] According to one embodiment, the hand-rolled cigarette paper in the form of a bobbin can be obtained by the manufacturing process for hand-rolled cigarette paper bobbins described above.
[0091] According to one embodiment, the sheet of hand-rolling cigarette paper can be obtained by the manufacturing process for sheets of hand-rolling cigarette paper described above.
[0092] Sheets of hand-rolling tobacco papers may be sold in booklets.
[0093] The present invention therefore also relates to a booklet of hand-rolled cigarette paper in sheet form as described above, which booklet can be obtained by the manufacturing process for a booklet of hand-rolled cigarette paper sheets as described above.
[0094] The sheet of hand-rolling paper may be used, for example, to form a cigarette. Accordingly, the present invention also relates to a cigarette comprising the sheet of hand-rolling paper.
[0095] example
[0096] Example 1 according to the present invention
[0097] An aqueous gum arabic solution (38% gum arabic by weight) was applied by flexographic printing using four plates to a web of hand-rolled cigarette paper advancing at a speed of 220 m / min. The web was then dried and each bobbin was then coated with 6 g / m 2 The bobbin is cut to obtain four bobbins provided with adhesive strips having gum arabic with a basis weight of 100g.
[0098] The bobbin is then cut into sheets.
[0099] Each sheet has a rectangular shape, 110 mm long and 44 mm wide, with continuous adhesive strips along the two long sides of the sheet, and a basis weight of 6 g / m 2 is.
[0100] Comparative Example 2
[0101] A web of hand-rolled cigarette paper is cut into bobbins. An aqueous gum arabic solution (45% gum arabic by weight) is applied to the hand-rolled cigarette paper bobbins, which are moving forward at a running speed of 55 m / min, by using a nozzle. The bobbins are then dried to obtain bobbins with adhesive strips having a gum arabic basis weight of 8 g / m.
[0102] The bobbin is cut into the shape of a sheet.
[0103] Each sheet has a rectangular shape, 110 mm long and 44 mm wide, with a continuous adhesive strip on one of the two long sides of the sheet, and a basis weight of 8 g / m 2 is.
[0104] Comparison with the process of Example 1 (according to the invention) and the process of Example 2 (comparison)
[0105] The process for producing the sheet according to Example 1 (invention) is four times faster than the process for producing the sheet according to Example 2 (comparison), requires less gum arabic and allows the production of a sheet with a continuous adhesive strip, the basis weight of which is 8 g / m 2 6g / m 2 , a 15% decrease.
[0106] Therefore, the productivity of the process of Example 1 is higher than the productivity of the process of Example 2.
[0107] Example 3 - Adhesion Test
[0108] Ten sheets according to the invention (manufactured by the process of Example 1) were bonded together after wetting the adhesive strip. After air drying, the sheets were tested for adhesion failure by pulling. Eight of the ten sheets did not peel off.
[0109] Ten comparative sheets (manufactured by the process of Example 2) were adhered to each other after wetting the adhesive strips. After air drying, the sheets were tested for adhesive failure by pulling. Nine of the ten sheets did not peel. This test showed that the inventive sheets, which had 15% less gum arabic than the adhesive strips of the comparative sheets, had similar adhesive properties to the comparative sheets.
Claims
1. 1. A process for manufacturing a bobbin of hand-rolled cigarette paper with a moisture-activated adhesive strip along one of the long sides of the bobbin, comprising: (a) cutting the web of cigarette paper to obtain the bobbins of cigarette paper; (b) applying the moisture-activated adhesive strip along one of the long sides of the bobbin of cigarette paper to obtain the bobbin of cigarette paper with the moisture-activated adhesive strip along one of the long sides of the bobbin of cigarette paper; The coating step (b) is carried out before or after the cutting step (a), the applying step (b) is performed by flexographic printing, gravure printing, or indirect flexographic printing; The process, wherein the applying step (b) is carried out at a running speed of 70 m / min or more.
2. 10. The process of claim 1, wherein the wet-activated adhesive is selected from sugar solutions, polysaccharides, starches and gums, and mixtures thereof.
3. The wet-activated adhesive strip has a basis weight of 8 g / m 2 3. The process of claim 1 or 2, wherein:
4. The process of any one of claims 1 to 3, wherein the mass concentration of the wet-activated adhesive in the wet-activated adhesive strip is configured to be at least 95%.
5. The process of any one of claims 1 to 4, wherein the wet-activated adhesive strip comprises an additive selected from plasticizers, defoamers, dyes, aromatic compounds, and mixtures thereof.
6. 1. A process for producing the sheet of cigarette paper for the hand-rolled cigarette, comprising: (c) cutting at least one bobbin of cigarette paper of the hand-rolled cigarette produced by the process of any one of claims 1 to 5.
7. 1. A process for manufacturing a booklet of the sheets of the cigarette paper for the hand-rolled cigarettes, comprising: (d1) forming a stack of said sheets of said cigarette paper for said hand-rolled cigarettes produced by the process of claim 6.
8. 1. A process for producing a booklet of said sheets of cigarette paper for said hand-rolled cigarettes, comprising: (d2) forming a stack of the bobbins of cigarette paper for the hand-rolled cigarettes produced by the process of any one of claims 1 to 5; (e) cutting said stack of bobbins to form said stack of sheets.
Citation Information
Patent Citations
Process for manufacturing a ventilated cigarette paper
EP1192868A1
Paper with a band, smoking articles, and methods
JP2010529306A
Composition for coating rolling papers for smoking articles
JP2014516558A
Oil-resistant filter wrapper paper
JP2014525995A
Multi-segment components for aerosol-generating articles
JP2018531594A