Cigar wrapper and cigar case and preparation method thereof

Abstract

The present invention relates to the technical field of cigars, and in particular to a cigar wrapper and binder and a preparation method thereof. The method uses biological enzymes to catalyze lignin cross-linking to prepare the wrapper and binder, and can prepare wrappers and binders of different colors by hot pressing at 80°C. The prepared cigar wrapper and binder are green, environmentally friendly and non-toxic, have strong physical properties, and have moisture-proof function.

Description

Technical Field

[0001] The present invention relates to the technical field of cigars, and in particular to a cigar wrapper and a cigar case and a preparation method thereof. Background Art

[0002] At present, the mainstream of handmade cigar products is to use tobacco leaves as raw materials for wrappers. However, the domestic cigar raw materials started late, and the overall quality is low. The requirements for the cultivation of wrapper tobacco leaves are very strict. The wrapper tobacco leaves of most cigars in the world are shade-planted, that is, they are covered during the planting process and the sunlight does not directly expose the tobacco leaves. In addition, the production process of using cigar tobacco leaves as cigar wrappers and wrappers is complicated, the utilization rate is low, and the cost is relatively high.

[0003] Cigars themselves not only have different shapes and colors, but the outermost tobacco leaf of the cigar - the wrapper, has even richer tones. They are usually distinguished by seven categories. The wrappers are named after their planting methods, harvesting methods or country of origin. The color can be distinguished according to the depth: bluish brown, light brown, medium brown, dark reddish brown, dark brown, coffee-like dark brown and nearly black.

[0004] A Chinese patent application numbered CN 113892671 A discloses a method for preparing cigar wrappers and binders based on dry-sheet technology. The technical scheme includes the following points: (1) cutting tobacco stems into segments; (2) mechanically grinding tobacco stem segments into tobacco stem crude fibers; (3) using airflow forming to obtain tobacco substrates; (4) mixing a binder and tobacco powder to obtain an adhesive filling mixture; (5) diffusing the adhesive filling mixture into the tobacco substrate by first venturi atomization to obtain a first tobacco substrate semi-finished product; (6) dispersing glycerol into the first tobacco substrate semi-finished product to obtain a second tobacco substrate semi-finished product; (7) performing mechanical hot pressing to obtain cigar wrappers or binders. The method of the present invention can retain the original natural aroma components of tobacco raw materials. The color and thickness of the product are improved, and the thickness is uniform. The wet strength of the product can be improved by forming an interpenetrating network structure of the binder. However, at present, the cigar wrappers and binders prepared based on dry-sheet technology have a relatively single color and serious discoloration when exposed to water. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention provides a wrapper and a binder and a preparation method thereof. The present invention uses biological enzymes to catalyze the cross-linking of lignin to prepare the wrapper and the binder, which is green, environmentally friendly and non-toxic; different colors of wrappers and binders can be prepared by hot pressing at 80°C, and the prepared wrappers and binders have excellent physical properties and moisture-proof functions.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] The invention provides a tobacco sheet coating liquid, which is a buffer solution containing lignin sulfonate and laccase.

[0008] In some embodiments of the present invention, the tobacco sheet coating liquid is an acetic acid / sodium acetate buffer at pH 4.8 containing 0.6% to 1.2% (v / v) lignin sulfonate and 1.5% to 2.5% (v / v) laccase. In some specific embodiments, the tobacco sheet coating liquid is an acetic acid / sodium acetate buffer at pH 4.8 containing 1% (v / v) lignin sulfonate and 2% (v / v) laccase.

[0009] The present invention has no particular limitation on the source of laccase, which may be a common commercial product in the art.

[0010] The present invention also provides a method for preparing a cigar wrapper and a cigar casing, characterized in that it comprises:

[0011] The tobacco sheet coating liquid and 0-3 wt% of pigment are sprayed on the tobacco sheet, and the cigar wrapper and casing are obtained through roller pressing.

[0012] In the present invention, the spraying amount of the tobacco sheet coating liquid is the mass percentage of the tobacco sheet coating liquid to the tobacco sheet. In some embodiments, the spraying amount is 4wt% to 6wt%, that is, the spraying amount of the tobacco sheet coating liquid accounts for 4% to 6% of the mass percentage of the tobacco sheet. In some specific embodiments, the spraying amount is 5wt%.

[0013] In the present invention, the tobacco sheet is a dry-process tobacco sheet. The present invention has no special requirements on the preparation process of the dry-process tobacco sheet, and the dry-process tobacco sheet can be prepared according to conventional methods in the art.

[0014] Lignin sulfonate has good dispersion properties in aqueous media, which is conducive to achieving liquid phase high-pressure atomization, uniformly distributed among the dry-process thin-sheet fibers, and combined with the fibers; while the methoxy, hydroxyl, carbonyl and other functional groups on the lignin sulfonate give it certain catalytic cross-linking properties, and can be cross-linked with the fibers on the dry-process thin-sheet through hydrogen bonds and covalent bonds.

[0015] In the present invention, the temperature of the roller pressing treatment is 30-80°C, and the pressure is 9MPa-11MPa. In some specific embodiments, the temperature of the roller pressing treatment can be 30°C, 50°C or 80°C, and the pressure can be 9MPa, 10MPa or 11MPa.

[0016] In the present invention, the pigment is caramel pigment, which is a natural colorant widely used in food. By spraying an appropriate amount of caramel pigment and the coating liquid of the present invention on dry tobacco sheets, the cigar wrapper and the wrapper can be made brown-black and not brittle at 80°C; at the same time, the cigar wrapper and the wrapper can be given the flavor of candy or chocolate. The colors of the prepared cigar wrapper and the wrapper include blue-brown, light brown, medium brown, dark reddish brown, dark brown, coffee-dark brown and black brown;

[0017] The method for preparing the green-brown cigar wrapper and binder comprises: spraying the tobacco sheet coating liquid of the present invention at a spraying amount of 5wt% on the tobacco sheet, and performing roller pressing to obtain the cigar wrapper and binder; the roller pressing temperature is 30°C and the pressure is 10MPa;

[0018] The preparation method of the light brown wrapper and binder comprises: spraying the tobacco sheet coating liquid of the present invention on the tobacco sheet at a spraying amount of 5wt%, and performing roller pressing to obtain the cigar wrapper and binder; the roller pressing temperature is 80°C and the pressure is 10MPa;

[0019] The method for preparing the medium brown wrapper and binder comprises: spraying the caramel pigment and the tobacco sheet coating liquid of the present invention on the tobacco sheet at a spraying amount of 0.5wt% and 5wt% respectively, and performing roller pressing to obtain the cigar wrapper and binder; the roller pressing temperature is 80°C and the pressure is 10MPa;

[0020] The preparation method of the dark reddish brown cigar wrapper comprises: spraying caramel pigment and the tobacco sheet coating liquid of the present invention on tobacco sheets at a spraying amount of 1wt% and 5wt% respectively, and performing roller pressing to obtain a cigar wrapper and a cigar wrapper; the roller pressing temperature is 80°C and the pressure is 10MPa;

[0021] The preparation method of the dark brown cigar wrapper and binder comprises: spraying caramel pigment and the tobacco sheet coating liquid of the present invention on tobacco sheets at a spraying amount of 1.5wt% and 5wt% respectively, and performing roller pressing to obtain a cigar wrapper and binder; the roller pressing temperature is 80°C and the pressure is 10MPa;

[0022] The method for preparing the coffee-dark brown wrapper and binder comprises: spraying caramel pigment and the tobacco sheet coating liquid of the present invention on tobacco sheets at a spraying amount of 2wt% and 5wt% respectively, and performing roller pressing to obtain a cigar wrapper and binder; the roller pressing temperature is 80°C and the pressure is 10MPa;

[0023] The method for preparing the dark brown cigar wrapper and binder comprises: spraying the tobacco sheet coating liquid of the present invention with the caramel pigment at a spraying amount of 3wt% and 5wt% respectively on the tobacco sheet, and obtaining the cigar wrapper and binder by roller pressing; the temperature of the roller pressing treatment is 80°C and the pressure is 10MPa.

[0024] The cigar wrapper and cigar case prepared by the invention have rich colors and can provide more kinds of cigar finished products; and the cigar wrapper and cigar case have better physical strength and flexibility, better waterproof performance, are not easy to fade when contacting water, and have good moisture resistance.

[0025] The present invention also provides a cigar wrapper obtained by the above-mentioned preparation method. The structure of the cigar wrapper is a sandwich structure consisting of lignin sulfonate / dry-process tobacco flakes / lignin sulfonate. The present invention simulates the plant lignification process, and uses a lignin sulfonate-laccase system to catalyze the free radical polymerization reaction of residual lignin p-hydroxycinnamic acid and lignin sulfonate in the dry-process flake fibers, so that covalent bonds such as anisole bonds and ester bonds are regenerated between the separated fibers, so that strong chemical bonds are formed between the fibers, and a layer of lignin is covered on the fiber surface, thereby repairing the fiber intercellular layer. The formaldehyde pollution problem caused by the manufacture and use of traditional enhancers is fundamentally eliminated, and a truly green, environmentally friendly, and non-toxic cigar wrapper and wrapper are manufactured. The new type of cigar wrapper and binder prepared uses lotus leaf bionic technology to form a "sandwich" structure model. The lignin sulfonate is internally associated with reactive groups such as hydroxyl, aldehyde and carboxyl groups on the dry-process tobacco sheets, and covers both sides of the dry-process tobacco sheets to form a lignin sulfonate-dry-process tobacco sheets-lignin sulfonate three-ply structure (i.e., a sandwich structure), giving the cigar wrapper and binder the characteristics of softness and high strength.

[0026] The tobacco sheet based on the dry process of the present invention has the characteristics of being loose and porous, having a high bulk thickness, and having a strong load capacity. The lignin sulfonate laccase system and caramel pigment are sprayed onto the dry process tobacco sheet by a high-pressure spray gun, so that the cigar wrapper and the binder can reach a nearly black standard under a temperature condition below 80°C, thereby avoiding the condition of being brittle and fragile under high temperature conditions. In addition, after the lignin sulfonate-laccase system is sprayed onto the dry process tobacco sheet, the lignin sulfonate reacts with the free radical polymerization of the residual lignin p-hydroxycinnamic acid in the dry process sheet fiber under the catalytic action of the laccase, so that the separated fibers regenerate covalent bonds such as anisole bonds, and after roller treatment, a "sandwich" model structure is formed, while giving the sheet surface a special physical structure. The formation of these chemical bonds can not only improve the bonding strength between the fibers, but also hinder the fibers from absorbing water and swelling, and protect the hydrogen bonds and ester bonds between the fibers from being destroyed, thereby improving the physical strength and water resistance of the cigar wrapper and the binder. Lignin covers both sides of the dry-process tobacco flakes, forming a three-ply structure of lignin sulfonate-dry-process tobacco flakes-lignin sulfonate, which gives the cigar wrapper and binder softness and high strength. Not only does it greatly increase the contact angle of the cigar wrapper and binder surface, making them less likely to discolor after smoking; the addition of lignin sulfonate also makes the cigar wrapper and binder softer, improving production efficiency during the cigar rolling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Figure 1 shows the color loss of the cigar wrapper before and after adding the coating liquid of the present invention, 1-a shows the color loss of the caramel-colored cigar wrapper, 1-b shows the color loss of the black cigar wrapper, wherein the upper figure shows the addition of the coating liquid of the present invention, and the lower figure shows the addition of the coating liquid of the present invention;

[0028] Figure 2 The figure shows the mass change of the binder under constant temperature and humidity conditions of 30℃ and 90%. DETAILED DESCRIPTION

[0029] The present invention provides a cigar wrapper and a binder and a method for preparing the same. A person skilled in the art may refer to the contents of this invention and appropriately improve the process parameters to achieve the same. It should be particularly noted that all similar substitutions and modifications are obvious to a person skilled in the art and are considered to be included in the present invention. The method and application of the present invention have been described through preferred embodiments, and relevant persons may obviously modify or appropriately change and combine the method and application of the present invention without departing from the content, spirit and scope of the present invention to implement and apply the technology of the present invention.

[0030] The test materials used in the present invention are all common commercial products and can be purchased in the market.

[0031] The present invention will be further described below in conjunction with embodiments:

[0032] Example 1 Preparation of coating solution

[0033] (1) Preparation of dry tobacco sheets.

[0034] (2) Preparation of coating solution (i.e., lignin sulfonate laccase system):

[0035] ① Prepare acetic acid / sodium acetate buffer with a pH of 4.8;

[0036] ② Add lignin sulfonate (volume fraction 1:100), and after the lignin sulfonate is completely dissolved, add laccase (volume fraction 50:1) to the system, wherein the final concentration of lignin sulfonate is 1 vol%, and the final concentration of laccase is 2 vol%.

[0037] (3) Preparation of wrapper and binder:

[0038] Preparation of the green-brown wrapper: 5 wt% lignin sulfonate laccase system was uniformly sprayed using a high-pressure spray gun, and the roller pressing conditions were set at 30°C and 10MPa;

[0039] Preparation of light brown wrapper: using a high-pressure spray gun to evenly spray 5 wt% lignin sulfonate laccase system, and rolling conditions are as follows: the roller is set at 80°C and 10MPa;

[0040] Preparation of medium brown wrapper: 0.5 wt% caramel pigment and 5 wt% lignin sulfonate laccase system were uniformly sprayed successively by a high-pressure spray gun, and the roller pressing conditions were set at 80°C and 10 MPa;

[0041] Preparation of dark reddish brown wrapper: 1 wt% caramel pigment and 5 wt% lignin sulfonate laccase system were uniformly sprayed successively by a high-pressure spray gun, and the roller pressing conditions were set at 80°C and 10MPa;

[0042] Preparation of dark brown wrapper: 1.5 wt% caramel pigment and 5 wt% lignin sulfonate laccase system were uniformly sprayed successively by a high-pressure spray gun, and the roller pressing conditions were set at 80°C and 10 MPa;

[0043] Preparation of coffee-like dark brown wrapper: 2 wt% caramel pigment and 5 wt% lignin sulfonate laccase system were uniformly sprayed successively by a high-pressure spray gun, and the roller pressing conditions were set at 80°C and 10MPa;

[0044] Preparation of dark brown wrapper and jacket: 3 wt% caramel pigment and 5 wt% lignin sulfonate laccase system were uniformly sprayed successively by using a high-pressure spray gun, and the roller pressing conditions were as follows: the roller was set at 80° C. and 10 MPa.

[0045] Test Example 1

[0046] 1. Moisture-proof function test

[0047] The cigar wrapper prepared by the prior art and the cigar wrapper prepared by Example 1 of the present invention were taken, and the mass changes of the samples were tracked and recorded under constant temperature and humidity conditions of 30° C. and 90% humidity.

[0048] The preparation method of the prior art is as follows:

[0049] (1) cutting tobacco stems into segments; (2) mechanically grinding the tobacco stem segments into tobacco stem crude fibers; (3) using airflow molding to obtain tobacco substrate; (4) mixing a binder and tobacco powder to obtain an adhesive filling mixture; (5) diffusing the adhesive filling mixture into the tobacco substrate through a first venturi atomization to obtain a first tobacco substrate semi-finished product; (6) dispersing glycerol into the first tobacco substrate semi-finished product to obtain a second tobacco substrate semi-finished product; (7) performing mechanical hot pressing at a pressure of 10 MPa, a temperature of 80°C, and a time of 5 minutes to obtain a cigar wrapper or a cigar case.

[0050] Table 1 Changes in binder mass under constant temperature and humidity conditions at 30℃ and 90%

[0051]

[0052]

[0053] 2. Physical performance experiment:

[0054] 2.1 Determination of tensile strength and elongation

[0055] The tensile strength and elongation were determined according to the national standard GB / T 12914-2018.

[0056] 1. Cut a sample strip with a width of 15±0.1mm and a length sufficient to be clamped between the two clamps from an undamaged sample. Avoid touching the sample part between the two clamps with bare hands. There should be no watermarks, folds or wrinkles in the test area. The two long sides of the sample should be straight, and the parallelism error should not exceed ±0.1mm within the entire clamping length. The sample cut should be neat and undamaged. Cut enough sample strips at a time to ensure 10 valid test results.

[0057] 2. Place the sample in the clamping area of ​​the tensile strength tester. Be careful not to touch the test area between the two clamping lines of the sample with your hands. Straighten the sample without any perceptible slack and without obvious strain. Ensure that the sample is parallel to the direction of the applied tension.

[0058] 3. Start the test until the specimen breaks. Record the maximum tensile force applied and read the elongation at break (%) directly from the instrument.

[0059] 2.2 Determination of wet strength

[0060] Cut the sample treated under standard temperature and humidity conditions into 15mm×220mm test pieces, put them into a dish filled with 20℃ water, and soak them for 1 hour. After the specified time, take the sample out of the dish and gently absorb the liquid on the surface of the sample with filter paper.

[0061] The sample is quickly placed on a tensile strength tester to measure the tensile strength. The measurement method is the same as the tensile strength test method in 2.1.

[0062] 2.3 Determination of bursting strength

[0063] Cut the sample treated under standard temperature and humidity conditions into more than 10 samples of 70×70 mm. Place the sample on the elastic film. Press the "test" button, and the instrument automatically completes a working cycle. Read the display reading (unit: kPa).

[0064] Table 2 Physical properties of binder

[0065]

[0066] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for preparing a cigar wrapper, characterized in that: include: Spraying the tobacco sheet coating liquid onto the tobacco sheet, and rolling the sheet to obtain a cigar wrapper; The tobacco sheet coating liquid is an acetic acid / sodium acetate buffer with a pH of 4.8 containing 0.6-1.2 vol% lignin sulfonate and 1.5-2.5 vol% laccase; The colors of the cigar wrapper include green brown, light brown, medium brown, dark reddish brown, dark brown, coffee dark brown and black brown; The method for preparing the green-brown wrapper and binder comprises: spraying the tobacco sheet coating liquid at a spraying amount of 5wt% on the tobacco sheet, and performing roller pressing to obtain the cigar wrapper and binder; the roller pressing temperature is 30°C and the pressure is 10MPa; The preparation method of the light brown wrapper and binder comprises: spraying the tobacco sheet coating liquid at a spraying amount of 5wt% on the tobacco sheet, and performing roller pressing to obtain the cigar wrapper and binder; the roller pressing temperature is 80°C and the pressure is 10MPa; The method for preparing the medium brown wrapper and binder comprises: spraying the caramel pigment and the tobacco sheet coating liquid on the tobacco sheet at a spraying amount of 0.5wt% and 5wt% respectively, and performing roller pressing to obtain the cigar wrapper and binder; the roller pressing temperature is 80°C and the pressure is 10MPa; The preparation method of the dark reddish brown cigar wrapper comprises: spraying caramel pigment and the tobacco sheet coating liquid on tobacco sheets at a spraying amount of 1wt% and 5wt% respectively, and obtaining a cigar wrapper and a cigar wrapper by roller pressing; the roller pressing temperature is 80° C. and the pressure is 10MPa; The method for preparing the dark brown cigar wrapper and binder comprises: spraying the caramel pigment and the tobacco sheet coating liquid on the tobacco sheet at a spraying amount of 1.5wt% and 5wt% respectively, and performing roller pressing to obtain the cigar wrapper and binder; the roller pressing temperature is 80°C and the pressure is 10MPa; The method for preparing the coffee dark brown wrapper and binder comprises: spraying the caramel pigment and the tobacco sheet coating liquid on the tobacco sheet at a spraying amount of 2wt% and 5wt% respectively, and performing roller pressing to obtain the cigar wrapper and binder; the roller pressing temperature is 80° C. and the pressure is 10MPa; The method for preparing the dark brown cigar wrapper and binder comprises: spraying the caramel pigment and the tobacco sheet coating liquid on the tobacco sheet at a spraying amount of 3wt% and 5wt% respectively, and performing roller pressing to obtain the cigar wrapper and binder; the roller pressing temperature is 80° C. and the pressure is 10MPa; The tobacco sheet is a dry-process tobacco sheet.

2. Cigar wrapper and cigar binder prepared by the preparation method according to claim 1.

3. The cigar wrapper according to claim 2, characterized in that: Its structure is a sandwich structure of lignin sulfonate / dry-process tobacco flakes / lignin sulfonate.

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