KR101430347B1 - Tip paper, plug wrap with water or oil resistance and cigarette having the same, manufacturing method of the tip paper - Google Patents

Abstract

A cigarette according to an embodiment of the present invention comprises a pipe unit; a filter unit connected with the pipe unit; filter wrapping paper which wraps at least a part of the pipe unit and filter unit; tip paper which wraps the filter wrapping paper; and a waterproof film which adheres to the tip paper so as to give waterproof properties to the tip paper. By means of such a structure, the waterproof film adheres to the tip paper so that the tip paper can have waterproof properties. Accordingly, the tip paper can be prevented from becoming wet even when stained with a liquid like saliva or water while being smoked, and the filter inside can be also protected, so smoking satisfaction can be improved. In addition, an oilproof film is further included by adhering to the tip paper or filter wrapping paper to give oilproof properties to the tip paper or filter wrapping paper. When a fragrant capsule is included in the filter unit, oil contained in the fragrant capsule may leak when the fragrant capsule is destroyed. The oilproof properties are given to the filter wrapping paper by means of the oilproof film so that the filter wrapping paper and tip paper can be prevented from becoming contaminated by oil spots.

Description

TECHNICAL FIELD [0001] The present invention relates to a tip paper having a waterproof property or oil resistance, a filter paper, a cigarette having the same, and a method of manufacturing a tip paper,

Disclosed is a tip paper, a filter paper, a cigarette having the same, and a method of manufacturing a tip paper having water resistance or oil resistance. More specifically, it is possible to impart water resistance to the tip paper and oil resistance to the filter wrapper by laminating a waterproof film or an oil-resistance film on the tip paper or the filter wrapper, and therefore, A tip paper, a filter paper, a cigarette with them, and a method of making a tip paper are disclosed.

As is generally known, it is known that cigarette smoke generated during smoking processes includes tar, nicotine and various pyrolysis products. Therefore, it is important to remove some of the substances contained in the smoke that have a negative effect on the taste of the cigarette, and the filter is attached to the cigarette.

These filters are generally wrapped around a filter wrapper, and each nipple and filter of a cigarette is wrapped by a tip paper. Therefore, the smoker puts on the tip paper on which the filter is provided and performs suction operation.

However, since the tip paper of the conventional cigarette is not waterproof or is not provided, when the smoker smokes, the tip paper may be wetted by the penetration of the needle and the tip paper may get wet when the smoker touches with the wet hand or chews with the tooth. There is a possibility that the filter located inside the filter may be damaged.

Therefore, development of a cigarette that can improve the satisfaction of smoking by imparting waterproofness to the tip paper is required.

In addition, if the filter includes a perfume capsule, etc., the oil contained in the capsule may leak out when the capsule is broken, and the filter paper and the tip paper may be contaminated with oil stains, resulting in consumer complaints.

Therefore, it is required to develop a filter paper having a high degree of resistance to induction which is not contaminated with the oil of the capsules contained in the filter, and a wrapper having a property equivalent thereto.

It is an object of the present invention to provide a waterproof film which is capable of imparting waterproofness to a tip paper by laminating a waterproof film on the tip paper so that the tip paper can be prevented from being wetted The present invention also provides a filter paper, a filter paper, and a cigarette having the waterproof or oil resistant filter paper, and a method of manufacturing the same.

Another object of the present invention is to minimize the possibility of peeling between the waterproof film and the tip paper by strongly bonding the waterproof film and the tip paper to each other with the adhesive, And to provide a filter paper, a filter paper, and a cigarette having the waterproof or oil-resistant tip paper, filter paper, and a method of manufacturing the same.

Another object of the present invention is to provide a tip paper having a waterproof property or an oil-proof property, which can easily print on the outer surface of a waterproof film by bonding a waterproof film to a tip paper, Tobacco, and a method of manufacturing the same.

It is another object of the present invention to provide a filter cap which is capable of discharging oil contained in a perfume capsule when the perfume capsule is broken when the filter portion includes the perfume capsule, A filter paper wrapper, a filter paper wrapper, a cigarette having the filter paper wrapper and a cigarette having the waterproof or oil resistant tip filter paper, and a method of manufacturing the same.

A cigarette according to an embodiment of the present invention includes: A filter unit connected to each of the nodal parts; A filter wrapper surrounding at least a portion of each of the nose portions and the filter portion; A tip paper wrapping the filter wrapper; And a waterproof film laminated on the tip paper to impart the waterproof property to the tip paper. With this configuration, the waterproof film can be imparted to the tip paper by laminating the waterproof film on the tip paper, In addition to preventing the tip paper from getting wet, it can also protect the internal filter even when a needle or a liquid such as water is buried, thereby improving the satisfaction of smoking.

According to one aspect of the present invention, it is possible to further include an oil-resistant film laminated on the tip paper or the filter wrapper to impart oil resistance to the tip paper or the filter wrapper. According to this configuration, when the fragrance capsule is contained in the filter portion, the oil contained in the fragrance capsule can leak out when the fragrance capsule is broken. In this case, oil resistance is imparted to the filter wrapper by the oil film, Can be prevented from being contaminated with oil stains.

According to one aspect, the waterproof film may be made of a biodegradable cellulose film.

According to one aspect, the cellulose film is produced by combining cellulose acetate fiber and triacetin in a predetermined ratio.

According to one aspect, the tip paper and the waterproof film may be adhered to each other by a water-soluble adhesive in order to bond the tip paper and the waterproof film.

According to one aspect, the adhesive may have an amount of coating ranging from 5 to 30 g / m < ² >.

According to one aspect, the adhesive paper may be coated on the tip paper and then aged.

According to one aspect, the adhesive has a surface energy in the range of 30 to 50 dyne / cm, a molecular weight in the range of 500,000 to 1,200,000 g / mol, and a viscosity in the range of 2000 to 3000 cPs.

According to one aspect, the tip paper may be coated with a water or alcohol solution having an amount of coating ranging from 1 to 30 g / m < ² >, followed by aging treatment.

According to one aspect, the waterproof film has a glass transition temperature in the range of 120 to 200 ° C, a surface energy of 30 to 50 dyne / cm, a basis weight of 10 to 150 g / m ² , May have a value in the range of 10 to 120 mu m.

According to one aspect, the waterproof film may be printed with an aqueous or oily ink.

In the meantime, the tip paper according to the embodiment of the present invention is a tip paper for wrapping at least a part of a filter part connected to each beginning part of a cigarette and each of the beginning parts of a cigarette, and a cellulose film as a waterproof film, So that the tip paper can be prevented from being wetted even when the smear or liquid such as water is adhered to the smoker, and also the inside filter can be protected, so that the satisfaction of the smoking can be improved have.

The filter wrapper according to the embodiment of the present invention is a filter wrapper wrapping at least a part of a filter portion connected to each of the nose portions of the cigarette and the nose portions, wherein a cellulose film is attached as an oil- When the fragrance capsule is contained in the filter portion, the oil contained in the fragrance capsule may leak out when the fragrance capsule is destroyed. In this case, oil resistance is imparted to the filter wrapper by the oil film The filter paper and the tip paper can be prevented from being contaminated with oil stains.

According to one aspect, the filter wrapper can be applied as a tip paper.

According to another aspect of the present invention, there is provided a method of manufacturing a tip paper of a cigarette, comprising: preparing the tip paper; And attaching a waterproof film imparted with waterproof property to the tip paper. By this stepwise configuration, the waterproof film can be given to the tip paper by laminating the waterproof film on the tip paper, It is possible to prevent the tip paper from getting wet and to protect the inside of the filter, thereby improving the satisfaction of smoking.

According to one aspect, the waterproof film attached to the tip paper in the step of attaching the waterproof film may be prepared by combining cellulose acetate fibers and triacetin in a predetermined ratio.

According to one aspect, in the step of attaching the waterproof film, the tip paper and the waterproof film may be adhered with an aqueous adhesive.

According to one aspect, the method may further include a printing step of printing an aqueous or oily ink on the waterproof film, following the step of adhering the waterproof film.

According to the embodiment of the present invention, the waterproof film can be provided to the tip paper by laminating the waterproof film on the tip paper. Therefore, even when the tip paper is smoked during smoking or a liquid such as water is deposited, It can also protect the internal filter, which can improve the satisfaction of smoking.

In addition, according to the embodiment of the present invention, since the joint between the waterproof film and the tip paper is made strong by the adhesive, the possibility of peeling between the waterproof film and the tip paper can be minimized, The manufacturing process can be more smoothly performed.

In addition, according to the embodiment of the present invention, the waterproof film is joined to the tip paper, so that printing on the outer surface of the waterproof film can be performed more easily.

In addition, according to the embodiment of the present invention, when the fragrance capsule is contained in the filter portion, the oil contained in the fragrance capsule may leak out when the fragrance capsule is broken. In this case, It is possible to prevent the tip paper from being contaminated with oil stains.

1 is a view schematically showing a configuration of a cigarette according to an embodiment of the present invention.
FIG. 2 is a view schematically showing a state in which a waterproof film is attached to the tip paper of FIG. 1;
3 is a graph showing the water resistance of the conventional tip paper and the tip paper of this embodiment.
Figs. 4 and 5 are diagrams showing the coating amount of the water on the tip paper or the degree of curling caused by the aging treatment. Fig.
6 is a schematic view of a cigarette according to another embodiment of the present invention.
FIG. 7 is a graph showing the oil resistance of the tip paper of FIG. 6 and the conventional filter paper.

Hereinafter, configurations and applications according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE INVENTION The following description is one of many aspects of the claimed invention and the following description forms part of a detailed description of the present invention.

In the following description, well-known functions or constructions are not described in detail for the sake of clarity and conciseness.

FIG. 1 is a view schematically showing the construction of a cigarette according to an embodiment of the present invention, and FIG. 2 is a view schematically showing a state in which a waterproof film is attached to the tip paper of FIG.

Referring to FIG. 1, a cigarette 100 according to an embodiment of the present invention includes an initial portion 150 and a filter 110. The filter 110 includes filter parts 111 and 112 connected to the respective weft parts 150 to filter the smoke, a filter wrapper 120 surrounding the filter parts 111 and 112, a filter wrapper 120, And a tip paper (130) wrapping a rear end region of the paper sheet (150).

The filter units 111 and 112 of the present embodiment may be provided with a pair of acetate filters for filtering out impurities such as nicotine and tar generated from each nodule during smoking.

That is, the filter units 111 and 112 of the present embodiment may be provided with dual filters having two acetate filters in order to increase the filter efficiency. However, it is needless to say that the present invention is not limited thereto, and it may be provided by a mono filter or a triple filter having a single acetate filter.

As described above, the filter units 111 and 112 are wrapped around the filter paper wrapper 120 and the tip paper 130 is wrapped around the outer surface of the filter paper wrapper 120. That is, the smoker puts on the tip paper 130 and smokes.

However, as described above, in the conventional case, when the tip paper 130 is directly smoked while smoking or touching the tip paper 130 with a wet hand or chewing with the teeth, the tip paper 130 can be wetted, Water may permeate into the filter units 111 and 112 through the filter unit 130 and the filter units 111 and 112 may be distorted.

2, after the waterproof film 140 having the waterproof property is joined to the tip paper 130, the tip paper 130 with the waterproof film 140 bonded thereon is wound around the filter paper wrapper 140. As a result, 120).

Although not shown, the tip paper 130 is held in a state of being wound on a rolling member (not shown), and can be coupled to the filter units 111 and 112 to which the filter paper 120 is conveyed in a combined state.

Therefore, although the curled curl exists in the MD (machine direction) direction due to the winding structure of the tip paper 130, there is almost no curl in the CD (cross direction) direction of the width direction. Therefore, in the present embodiment, when the waterproof film 140 is adhered, curling in the MD direction may not precisely attach the waterproof film 140. In this embodiment, however, the tip paper 130 is watertight The film 140 can be attached smoothly and accurately.

In addition, by attaching a waterproof film to the tip paper, the curl in the CD direction can be reduced to, for example, 5 mm or less, thereby making the cigarette manufacturing process more smooth.

The waterproof film 140 of this embodiment is attached to the tip paper 130 to impart waterproofness to the tip paper 130. [ The waterproof film 140 may be made of a cellulose film having excellent waterproofness and biodegradability for environmental friendliness.

More specifically, the waterproof film 140 of the present embodiment can be produced by combining cellulose acetate fibers and triacetin in a predetermined ratio. For example, cellulose acetate fibers can be combined at 85 percent and triacetin at 14.5 percent. However, the present invention is not limited thereto, and it is natural that the material or the combination ratio of the waterproof film 140 may be formed differently.

The waterproof film 140 and the tip paper 130 of this embodiment can be bonded together by an adhesive (not shown). As the adhesive, a copolymer resin that is hot-melt can be used. By using such an adhesive, the adhesive strength between the tip paper 130 and the waterproof film 140 can be ensured, and the surface peeling phenomenon can be prevented can do. In addition, since the tip paper 130 and the waterproof film 140 are strongly adhered by the adhesive, it is possible to prevent the waterproof film 140 from being pushed against the tip paper 130 during the subsequent slitting and cutting, But can be done accurately.

Here, the adhesive is described as a water-soluble adhesive made of a copolymer resin, but the type and material of the adhesive are not limited thereto.

In order to make the curl in the CD direction not more than 5 mm after the laminating of the waterproof film 140 and the tip paper 130, and to make the value close to zero (0), it is necessary to optimize the coating amount of water (or alcohol solution) It is important to do. In addition, peeling may be prevented by coating the adhesive in an optimal amount, then drying the adhesive after coating with an appropriate drying temperature. This will be explained in the following table.

division Adhesive Coating Amount (g / m ² ) 13 20 40 60 Interfacial peeling of waterproof film and tip paper Not occurring Not occurring Peeling occurred Peeling occurred

When the adhesive coating amount is 13 to 20 g / m ² as shown in Table 1, peeling phenomenon does not occur between the interface between the tip paper 130 and the waterproof film 140, but when it is used in excess, It can be seen that the phenomenon occurs.

division Drying temperature after adhesive coating (℃) 50 70 90 110 Interfacial peeling of waterproof film and tip paper Not occurring  Peeling occurred Peeling occurred Peeling occurred

In addition, as shown in Table 2, when the drying temperature is maintained within 50 占 폚 after the adhesive coating, peeling does not occur between the interface between the tip paper 130 and the waterproof film 140, It can be seen that a high peeling phenomenon occurs. This is because, when the drying temperature is appropriately maintained, the time for the adhesive to penetrate into the tip paper 130 is given, and thus the occurrence of peeling can be prevented.

For reference, there are application conditions for the lamination of the waterproof film 140, that is, the cellulose film, and the tip paper 130 described above. The surface energy of the waterproof film 140 is 38 to 42 dyne / cm, the glass transition temperature is 140 ° C, the surface energy of the adhesive is 36 to 40 dyne / cm corresponding to the surface energy of the waterproof film 140 to some extent, Is 800,000 g / mol and the solids content can be 50%. And the drying temperature after the adhesive coating may be 35 ° C. In addition, the waterproof film 140 has a basis weight in the range of 10 to 150 g / m ² and a thickness in the range of 10 to 120 탆.

However, application conditions for the joint of the waterproof film 140 and the tip paper 130 are not limited thereto.

In addition, there are processing conditions for the lamination of the waterproof film 140 and the tip paper 130. As described above, the surface energy of the waterproof film 140 and the adhesive must be in a mutually similar range, and the adhesive partially penetrates into the tip paper 130, so that the adhesion of the waterproof film 140 to the tip paper 130 The drying temperature should be kept within 50 ℃ after the adhesive coating and the drying rate after the adhesive coating should be kept within 60m / min. After the waterproof film 140 is laminated on the tip paper 130, a drying process is performed after coating with an adhesive to secure a level of curl for printing and processing. In addition, water is coated and aged to curl in the CD direction . Here, the coating amount in water coating may have a value ranging from 1 to 30 g / m ² .

On the other hand, after printing the waterproof film 140 on the tip paper 130, the waterproof film 140 can be printed. For example, the waterproof film 140 can be printed with water-based or oil-based ink, thereby improving the printability. As described above, since the waterproof film 140 is made of a cellulose film, it is possible to perform reliable printing when printing with ink, and thus it is possible to prevent peeling of the waterproof film 140 and the ink layer.

Hereinafter, a method of manufacturing the tip paper 130 having the above-described structure will be schematically described.

The method of manufacturing the tip paper 130 according to the present embodiment includes the steps of preparing a tip paper 130, attaching a waterproof film 140 imparted with waterproof property to the tip paper 130, And a printing step of printing an aqueous or oily ink.

The tip paper 130 can be unwound from the rolling member in which the tip paper 130 is wound while the tip paper 130 is being prepared and then the waterproof film 140 may be attached.

In the step of attaching the waterproof film 140, the waterproof film 140 may be joined to the tip paper 130 using a water-soluble adhesive, as described above.

On the other hand, in the printing step, printing can be performed with water-based or oil-based ink on the waterproof film 140 laminated on the tip paper 130. At this time, since the waterproof film 140 is formed of a cellulose film, the printability of the ink can be improved.

In the following, the results of examining the waterproof property of the tip paper of the cigarette will be described with reference to the drawings and tables.

As shown in Table 1, in this experiment, the viscosity of the adhesive, the coating amount, the coating cylinder, the line speed, the temperature in the drying chamber, the wind in the drying chamber, the curling in the CD direction after the adhesive coating, , The first to third tests were conducted while adjusting the CD curl, the adhesive, and the CD curl after the first aging after the first aging. Similarly, the coating amount of the water, the coating cylinder, the line speed, the temperature of the drying chamber, And the CD curl after the water coating, the second aging, and the CD curl after the aging.

As a result, as shown in FIG. 3, the tip paper 130 according to the embodiment of the present invention was measured at a value of 3.5 seconds as a result of the stockigt measurement in the case of the general tip paper, Or more.

As a result, the tip paper 130 having the tip paper 130, that is, the waterproof film 140, according to an embodiment of the present invention has a waterproof property ten times or more as compared with the conventional tip paper. .

4 and 5, the degree of curling in the CD direction depending on whether or not the coating and aging of water is performed will be described below.

First, the graphs of FIGS. 4 and 5 show the results obtained when the experiment was conducted under the following conditions. As described above, the surface energy of the waterproof film 140 is 38 to 42 dyne / cm, the Tg is 140 ° C, and the surface energy of the adhesive is somewhat corresponding to the surface energy of the waterproof film 140, 40 dyne / cm, a molecular weight of 800,000 g / mol, and a solids content of 50%. The drying temperature after the adhesive coating is 35 ° C.

4, peeling of the waterproof film 140 and the tip paper 130 does not occur when the coating amount of the adhesive is 13 g / m ² to 20 g / m ² , and when the adhesive coating and the primary aging are performed It can be seen that curl is reduced by about 25 percent.

5, after the water is coated on the back surface of the tip paper 130 and the back surface of the tip paper 130 is coated with secondary aging or water, the degree of curling can be known. For example, (After water is coated on the back surface of the tip paper 130), the curl of the tip paper 130 is maintained at about 30 to 35 mm when the water coating amount is 3.5 g / m ² to 13.5 g / m ² , (After secondary aging and water coating on the back surface of the tip paper 130), the curl of the tip paper 130 is maintained to about 3 mm. In other words, it is possible to obtain the desired curl when water and aging are performed together. As described above, according to one embodiment of the present invention, the waterproof film 140 can be bonded to the tip paper 130, thereby imparting water-tightness to the tip paper 130. Accordingly, The tip paper 130 can be prevented from being wetted and the inner filter 110 can be protected, thereby improving the satisfaction of smoking.

In addition, since the joint between the waterproof film 140 and the tip paper 130 is made strong by the adhesive, the possibility of peeling between the waterproof film 140 and the tip paper 130 can be minimized, The curling of the waterproof film 140 can be reduced and the manufacturing process can be more smoothly performed and the waterproof film 140 is joined to the tip paper 130 to facilitate printing on the outer surface of the waterproof film 140. [ There is also an advantage that can be performed.

Hereinafter, a cigarette according to another embodiment of the present invention will be described, but substantially the same parts as those of the cigarette of the embodiment described above will be omitted.

6 is a schematic view of a cigarette according to another embodiment of the present invention.

Referring to FIG. 6, the cigarette 200 according to another embodiment of the present invention includes an initial portion 250 and a filter 210. The filter 201 includes a pair of filter portions 211 and 212, And an incense capsule 240 provided therebetween. The entire area of the filter 210 including the section of the incense capsule 240 is wrapped with the finished filter wrapper 225 and the pair of filter parts 211 and 212 are wrapped with the filter wrapper 221 A tip paper 230 is wrapped around the outside of the wrapper 225.

In the above-described embodiment, as described above, the waterproof film can be imparted to the tip paper 230 by bonding the waterproof film.

On the other hand, an oil-resistant film (not shown) having oil resistance may be laminated on the finished filter paper 225. Here, the oil-resistant film may be provided as a cellulose film, and the filter paper 225 and the oil-resistant film may be attached by a water-soluble adhesive.

Accordingly, even if the fragrance capsule 240 disposed between the filter units 211 and 212 is broken and the perfume liquid having the oil characteristic leaks, the filter paper wrapper 225 of the finished product and the wrapping tip paper 230 are oil-contaminated I can stop it.

FIG. 7 is a graph showing the oil resistance of the tip paper of FIG. 6 and the conventional filter paper wrapper.

With reference to this, the internal induction of the conventional oil-insulated wrapper and the filter paper wrapped with the oil-resistance film according to another embodiment of the present invention will be compared.

In addition, the inductive analysis used KIT containing a certain percentage of castor oil, toluene, and n-heptane, and the higher the KIT number, the higher the induction rate. As a result of the inductive measurement, the KIT number of the general oil-repellent paper was 6, but the inward induction of the filter paper of the present example in which the film was lapped exhibited a high KIT number of 12, It can be seen that the filter paper wrapper and the tip paper wrapping the filter paper are contaminated with the perfume oil even if the fragrance capsule is broken.

On the other hand, in the above-described another embodiment, the case where the tip paper is wrapped on the finished filter paper wrapped with the oil-resistance film is described above, but the present invention is not limited thereto. For example, it is natural that a tip paper having a waterproof property immediately without a finished filter paper wrapper can wrap the filter portion and the incense capsule, and in this case also, oil resistance can be provided.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

100: Tobacco
110: filter
120: Filter Wrapper
130: Tip Paper
140: Waterproof film
150:

Claims (18)

Each initial;
A filter unit connected to each of the nodal parts;
A filter wrapper surrounding at least a portion of each of the nose portions and the filter portion;
A tip paper wrapping the filter wrapper;
A waterproof film laminated on the tip paper to impart water resistance to the tip paper; And
And an oil-in-oil film laminated on the filter wrapping paper to impart oil resistance to the filter wrapping paper.
delete The method according to claim 1,
The waterproof film is made of a biodegradable cellulose film.
The method of claim 3,
The cellulose film is produced by combining cellulose acetate fiber and triacetin in a predetermined ratio.
The method according to claim 1,
Wherein the tip paper and the waterproof film are adhered to each other by a water-soluble adhesive for bonding the tip paper and the waterproof film.
6. The method of claim 5,
The adhesive has a coating amount in the range of 5 to 30 g / m < ² >.
6. The method of claim 5,
A cigarette which can be aged after the adhesive is coated on the tip paper.
6. The method of claim 5,
Wherein the adhesive has a surface energy in the range of 30 to 50 dyne / cm, a molecular weight in the range of 500,000 to 1,200,000 g / mol, and a viscosity in the range of 2000 to 3000 cPs.
The method according to claim 1,
The tip paper is coated with a water or alcohol solution having an amount of coating ranging from 1 to 30 g / m < ² >, followed by an aging cigarette.
The method according to claim 1,
Wherein the waterproof film has a glass transition temperature in the range of 120 to 200 DEG C, a surface energy of 30 to 50 dyne / cm, a basis weight in the range of 10 to 150 g / m < ^{2 &} Cigarettes with a value in the range.
The method according to claim 1,
The waterproof film is printed with aqueous or oily ink.
delete delete delete A method for producing a cigarette,
Providing a tip paper of said cigarette;
Attaching a waterproof film imparted with a waterproof property to the tip paper; And
Providing a filter wrapping paper of the cigarette and laminating and attaching an oil-resistant film imparted with oil resistance to the filter wrapping paper;
≪ / RTI > wherein the method comprises the steps of:
16. The method of claim 15,
Wherein the waterproof film attached to the tip paper in the step of attaching the waterproof film is manufactured by combining cellulose acetate fiber and triacetin in a predetermined ratio.
16. The method of claim 15,
And attaching the tip paper and the waterproof film with a water-soluble adhesive in a step of attaching the waterproof film.
16. The method of claim 15,
Further comprising a printing step of printing an aqueous or oily ink on the waterproof film following the step of adhering the waterproof film.

Images