JP5931492B2 - Method for producing antistatic laminated cellophane - Google Patents

Description

  The present invention relates to a method for producing an antistatic laminated cellophane, and more particularly to a method for producing a laminated cellophane in which cellophanes are laminated to increase strength.

  The regenerated cellulose film is generally called cellophane, cellophane film or the like, and is used as a packaging material for various articles. However, since current cellophane includes conversion to cellulose in the production process, the film thickness cannot be increased. Usually, the thickness of the cellophane is 10 μm to 50 μm. Cellophane is excellent in terms of transparency, antistatic properties, tearability, moderate rigidity, and biodegradability, but it has limited use due to film thickness restrictions, and it does not necessarily have the characteristics of cellophane. I did not make use of it.

  At present, the mainstream of antistatic films is synthetic resin films such as polyethylene terephthalate and polypropylene because of their ease of processing and molding. In such a synthetic resin film, in order to impart antistatic performance, a method of adding (kneading) an antistatic agent such as an amine compound to the resin or a method of coating on the film surface is generally used.

  However, the method of adding an antistatic agent to the resin has a high humidity dependency and tends to bleed out, and there is a problem that the antistatic performance is lowered due to a change with time. Further, appearance defects such as a decrease in transparency may be caused by addition of a high concentration. In the method of applying an antistatic agent to the film surface, problems such as drying, transfer failure, and surface contamination are included. For this reason, even with a synthetic resin film, it is not easy to impart antistatic performance.

  The antistatic performance is a highly necessary performance from the viewpoint of preventing sticking between films and preventing adhesion of dust. For this reason, the convenience of cellophane is still high. For example, when a packaging container such as a box that accommodates small articles is assumed, the transparent container makes it easy to grasp the product inside and gives a beautiful impression.

  Then, in order to give thickness to cellophane, the composite laminated body of cellophane which bonded cellophane and synthetic resin films, such as a polyethylene terephthalate and a polypropylene, with the adhesive agent is proposed (refer patent document 1). According to the composite laminate of Patent Document 1, the thickness increases in the form of a sheet rather than using only cellophane, and also has transparency and a shape maintaining property such as a crease. Therefore, the composite laminate can be easily processed and is convenient as a packaging material.

  Although cellophane is excellent in biodegradability, there are many types of synthetic resin films bonded to the cellophane that do not have biodegradability. Moreover, the kind which does not have biodegradability similarly is used for the adhesive agent used for bonding. However, due to the recent increase in environmental awareness, there is an increasing demand for reducing the environmental burden of product packaging.

JP 2003-19771 A

  The present invention has been proposed in view of the above-described situation, and it is possible to increase the thickness while making the best use of the antistatic performance of cellophane, and to obtain an antistatic laminated cellophane with improved biodegradability. A manufacturing method is provided.

That is, the invention of claim 1 comprises water-swelling cellophane paper containing a plurality of cellophane films, and applying and laminating carboxymethylcellulose as a water-soluble adhesive between the water-swelling cellophane papers, The present invention relates to a method for producing an antistatic laminated cellophane characterized by drying thereafter.

The invention of claim 2 is that water-swelling cellophane paper is obtained by water-containing a plurality of cellophane films, and starch decomposed by irradiating ultrasonic waves as a water-soluble adhesive between the water-swollen cellophane papers. The present invention relates to a method for producing an antistatic laminated cellophane characterized by laminating together and then drying.

Invention of Claim 3 concerns on the manufacturing method of the antistatic lamination | stacking cellophane of Claim 1 or 2 with which the said water swelling cellophane paper is bonded together in multiple times.

The invention of claim 4 relates to the method for producing an antistatic laminated cellophane according to any one of claims 1 to 3 , wherein the softening agent in the cellophane film is removed when the cellophane film is hydrated.

The invention of claim 5 relates to the method for producing an antistatic laminated cellophane according to any one of claims 1 to 4 , wherein the water-swelled cellophane paper is immersed in glycerin.

According to the method for producing an antistatic laminated cellophane according to the invention of claim 1, water-swelling cellophane paper is obtained by containing a plurality of cellophane films, and carboxymethyl cellulose is applied as a water-soluble adhesive between the water-swelling cellophane papers. The two layers are then laminated together, and then dried, so that high adhesion performance can be obtained when the water-swelling cellophane papers are bonded together , making it possible to increase the thickness while taking full advantage of the antistatic performance of cellophane. In addition, an antistatic laminated cellophane with improved biodegradability could be obtained.

According to the method for producing an antistatic laminated cellophane according to the invention of claim 2, a plurality of cellophane films are hydrated to form water-swollen cellophane paper, and ultrasonic waves are irradiated as a water-soluble adhesive between the water-swollen cellophane papers. By applying and laminating the decomposed starch, and then drying, it is possible to obtain relatively high adhesion performance when bonding water-swollen cellophane paper to each other, making full use of the antistatic performance of cellophane On the other hand, it was possible to obtain an antistatic laminated cellophane capable of increasing the thickness and having improved biodegradability.

According to the method for producing an antistatic laminated cellophane according to the invention of claim 3, in the invention of claim 1 or 2 , the water-swelling cellophane papers are bonded together a plurality of times. Become. The thickness of the antistatic laminated cellophane can be increased in proportion to the number of laminated sheets.

According to the method for producing an antistatic laminated cellophane according to the invention of claim 4, in the invention of any one of claims 1 to 3 , since the softener in the cellophane film is removed when the cellophane film is water-containing, the finished Can be hardened.

According to the method for producing an antistatic laminated cellophane according to the invention of claim 5, in the invention of any one of claims 1 to 4 , since the water-swelled cellophane paper is immersed in glycerin, the finished antistatic laminated cellophane is finished. Can be flexible. In addition, any of them can be aligned with biodegradable materials.

It is a cross-sectional schematic diagram of the antistatic laminated cellophane obtained by the manufacturing method of this invention. It is a schematic process drawing of the manufacturing method of this invention. It is a perspective view of an article using antistatic laminated cellophane. It is the whole photograph of the box which processed antistatic lamination cellophane.

  The cellophane constituting the antistatic laminated cellophane is usually prepared into viscose by reacting a fiber (cellulose) obtained from cotton, pulp, waste paper, etc. with carbon disulfide under alkali. The slurry-like viscose is released while being formed into a film by a hopper or the like in a coagulation bath containing sulfuric acid and sodium sulfate. Here, the viscose is converted to cellulose. Thus, regenerated cellulose (cellophane) is produced. Thereafter, the cellophane is completed by washing with water, desulfurization, bleaching, soft finishing, drying and the like. As can be seen from the series of processes, natural cellulose is the raw material, so it has excellent biodegradability.

  The antistatic laminated cellophane obtainable by the production method of the present invention will be described from the structure based on the schematic cross-sectional view of FIG. The antistatic laminated cellophane 10 of FIG. 1A is a laminated sheet-like product obtained by stacking two cellophane films 11 and bonding them together with a water-soluble adhesive. A water-soluble adhesive is applied to the bonding surfaces 12 of the cellophane films 11. The antistatic laminated cellophane 10x in FIG. 1 (b) has four cellophane films 11 and the antistatic laminated cellophane 10y in FIG. 1 (c) has six cellophane films 11 laminated, and a water-soluble adhesive on each adhesive surface 12. It is a sheet-like product made by applying and bonding. Thus, in any case, the structural material is only the cellophane film. Therefore, the number of cellophane films can be increased according to the purpose and application, and the thickness can be easily adjusted. Of course, the number of layers shown in the figure is an example, and a number of layers greater than that shown in the figure is possible.

  Then, the manufacturing method of the antistatic laminated cellophane prescribed | regulated to this invention using the schematic process drawing of FIG. 2 is demonstrated. First, a cellophane film as a structural material is prepared (FIG. 2A). This cellophane film 11 is hydrated by immersion in a water bath or the like, and becomes a water-swelled cellophane paper 11s (FIGS. 2B and 2C). A feature of this production method is that once dried cellophane is swollen with water and softened. When cellophane swells with water, the affinity with a water-soluble adhesive described later increases. At the same time, individual cellophane films can be easily joined together.

If necessary, a softening agent such as triethylene glycol is added to the cellophane film as a structural material according to production conditions and specifications. Therefore, if the composition is limited only to the biodegradable material, it is necessary to remove the softening agent. Therefore, as defined in claim 4 , the softening agent in the cellophane film is removed through the water content by the immersion of the cellophane film. Also, a somewhat harder finish can be achieved by removing the softener.

Or the cellophane film itself used as a structural material may be manufactured without the addition of a softening agent. Cellophane film of this specification is generally hard and close to the feel of paper. For this reason, it may be desired to increase the flexibility of the resulting laminate. Therefore, as defined in claim 5 , after water-containing by immersing the cellophane film, the water-swelled cellophane paper is immersed in a bath containing glycerin. Glycerin is a biodegradable material and has been established as a cellophane softener.

  Moreover, the combination which removes a softening agent once, and is immersed in a glycerol bath further as water swelling cellophane paper from the characteristic of both is also possible. These treatments are appropriately combined in consideration of the specifications of the cellophane film to be used, the film thickness, the product application, and the like.

  Next, a water-soluble adhesive 15 is applied between the water-swelling cellophane papers 11s (FIG. 2 (d)), and the water-swelling cellophane papers 11s are bonded together via the sticking surface 12 (FIG. 2 ( e)). The water-soluble adhesive 15 is an adhesive made of a component soluble in water or hot water and having high biodegradability, and a relatively wide variety is used. When applying the water-soluble adhesive 15 to the water-swelling cellophane paper 11s, known methods and tools such as spray coating, bar coater and doctor knife are used.

Specifically, gum arabic and carboxymethyl cellulose. Furthermore , starch etc. decomposed | disassembled by irradiating an ultrasonic wave. The grounds for employing these water-soluble adhesives are derived from the results of the examples.

  Gum arabic is often used as an adhesive for paper. This is because the cellophane film is mainly composed of cellulose and is considered to have a property close to that of paper. Carboxymethylcellulose (sodium carboxymethylcellulose) is known as an excipient, a granulating agent, various additives, and the like, and can provide adhesive performance relatively easily.

  The starch that has been decomposed by irradiating with the above-mentioned ultrasonic waves is obtained by dissolving the starch such as corn starch, waxy corn starch, potato starch, etc. in warm water and then irradiating with ultrasonic waves to moderately combine the sugar chain complex contained in the original starch It is a starch with a small molecular weight. That is, starch that has been physically processed without the use of enzymes or other chemicals. For example, it can be obtained by a technique disclosed in Japanese Patent No. 4288381, Patent No. 4663409, and the like.

  The water-swelling cellophane paper 11s is pasted through the pasting surface 12 so as not to generate air bubbles therebetween, and at the same time, it is completely adhered by pressing. Then, the integrated water-swelling cellophane papers return to the original cellophane film 11 by drying in the bonded state (FIG. 2 (f)). Thus, the antistatic laminated cellophane 10 is completed.

FIG. 2 shows an example of bonding two sheets. Therefore, three or more water-swelling cellophane papers can be laminated together with a water-soluble adhesive from the beginning. Alternatively, as specified in the invention of claim 3 , more layers can be easily laminated by forming two sheets of water-swollen cellophane paper once and laminating these water-swollen cellophane paper multiple times. . The thickness of the antistatic laminated cellophane increases in proportion to the number of laminated sheets. In the examples described later, the thickness is approximately 50 μm to 200 μm. If it becomes the said thickness, it will be inferior in the thickness of the existing synthetic resin film (sheet). Moreover, it can handle similarly to the existing synthetic resin film also in processes, such as cutting and bonding. Accordingly, it is possible to develop products with emphasis on the transparency, antistatic performance, and biodegradability resulting from cellophane.

  When producing the antistatic laminated cellophane of the present invention, it is possible to increase the scale by continuous production, in addition to sheet lamination as in the examples described later. For example, a cellophane film drawn from the raw fabric of the produced cellophane film is immersed in a water bath, and absorbed and swollen in the water bath to form a water-swollen cellophane paper. At this stage, a softener bath such as glycerin may be interposed. Then, excessive water and softening agent on the surface of the water-swelling cellophane paper continuously supplied are scraped off by the scraper. Here, the surface of the water swollen cellophane paper is coated with an adhesive by a coater or the like, and the water swollen cellophane paper supplied from another is laminated. Thus, the lamination proceeds continuously.

  Thereafter, the laminated water-swelling cellophane paper is passed between rollers such as a nip roll set at an appropriate linear pressure, and the mutual adhesion proceeds. After the close contact, it is transported into a dryer and the moisture in the interior is dried, and finally becomes a raw sheet of laminated cellophane by a winder.

  When three or more water-swelling cellophane papers are laminated, three layers may be laminated at the same time, or two layers may be laminated first, and water-swelling cellophane paper may be newly laminated thereon. Depending on the number of stacked layers, winding itself becomes difficult. At this time, it is cut into an appropriate length before or after drying to complete a sheet-like product.

  The perspective view of FIG. 3 is a box 50 assembled by processing the antistatic laminated cellophane (sheet-like material) produced by the manufacturing method of the present invention. This box 50 is an example of a processed product. The contents C are accommodated in the box 50. The contents C are not particularly limited and include a wide variety of foods, pharmaceuticals, cosmetics, household goods, stationery, clothing, electronic devices, and the like. A developed view forming the illustrated rectangular parallelepiped is cut out from the antistatic laminated cellophane. Then, a biodegradable adhesive or the like is applied to the glue margin 52 and attached to the side wall 51. Reference numeral 53 in the figure denotes an upper lid and 54 denotes a lower lid. Since the antistatic laminated cellophane is generally transparent, the contents C accommodated in the box 50 can be easily viewed. Therefore, it is suitable for appealing the appearance of the contents C itself.

[Creation and measurement conditions]
The following preparation and measurement were performed under the conditions of standard temperature state class 2 (temperature 20 ± 2 ° C.) and standard humidity condition class 5 (65 ± 5%) in JIS Z 8703 (1983).

[Measurement of thickness]
After conditioning for 8 hours or more under the conditions of standard temperature level 2 and standard humidity level 5 described above, Citizen Watch Co., Ltd .: MEI-10 Thickness measurement by stacking 10 samples with JIS paper thickness measuring machine The thickness per sheet was calculated.

[Measurement of basis weight]
After conditioning for 8 hours or more under the conditions of standard temperature level 2 and standard humidity level 5 above, each sample was cut to a size of 0.1 m ² and the weight was made by Shimadzu Corporation: Electronic Analytical Balance AUX The weight per 1 m ² was calculated as basis weight as measured by -220.

[Measurement of adhesive strength and tensile strength]
For both adhesive strength and tensile strength, after conditioning for 8 hours or more under the conditions of standard temperature level 2 and standard humidity level 5 above, use TEN ZILON Universal Testing Machine RTG-1210 (JIS Z 1521) 1995), a test piece having a width of 15 mm and a length of 200 mm was cut and measured. The adhesive strength was measured at a tensile speed of 10 mm / min. The tensile strength was measured at a tensile speed of 300 mm / min.

[Measurement of haze]
Based on JIS K 7105 (1981), it measured using Nippon Denshoku Industries Co., Ltd. haze meter NDH-500.

[Measurement of charged voltage]
Each prototype was cut into 40 mm × 70 mm test pieces. Then, in a thermostatic chamber adjusted to 23 ° C. and a relative humidity of 50% (RH%), each test piece was subjected to the wind of WIN STAT BF-2ZA AIR IONIZER manufactured by Sicid Electrostatic Co., Ltd. The charged voltage was measured using a static one meter H-0110 manufactured by company. In addition, half-life and decay rate were also measured. After measurement, the charged voltage, half-life, and decay rate were compared with the case of the plastic film cut to the same size.

[Selection of water-soluble adhesive]
An adhesive with biodegradability was selected. At the same time, the cellophane film was hydrated to form water-swollen cellophane paper, and the water-swollen cellophane paper was used for lamination. There are the following five types of adhesives.

[Types of water-soluble adhesive]
Adhesive 1: Sodium carboxymethylcellulose (Kishida Chemical Co., Ltd., product code 020-14515)
Adhesive 2: Ultrasonically processed starch (Futamura Chemical Co., Ltd., Fsmash (registered trademark); a starch obtained by irradiating gelled starch with ultrasonic waves to lower its molecular weight.)
Adhesive 3: Gum arabic (manufactured by Kishida Chemical Co., Ltd., product code 020-05475)
Adhesive 4: Casein (Kishida Chemical Co., Ltd., product code 020-14675)
Adhesive 5: glue (manufactured by Holbein Industry Co., Ltd., PG509)

[Preparation of adhesive]
In preparation of the adhesive, the adhesives 1 to 5 described above were dissolved and stirred in room temperature ion-exchanged water at a concentration of 1%, 5%, and 10%, and uniformly dispersed by a homogenizer for 5 minutes. Subsequent concentration descriptions refer to weight percent concentrations.

  At this time, adhesives 1 (carboxymethylcellulose sodium), 2 (ultrasound processed starch), and 3 (gum arabic) were water-solubilized at all three concentrations. On the other hand, adhesives 4 (casein) and 5 (glue) were not required for water at any concentration. Therefore, adhesives 1 (sodium carboxymethylcellulose), 2 (ultrasound processed starch), and 3 (gum arabic) are suitable as water-soluble adhesives.

[Lamination of cellophane film]
A smooth cellophane film (Futamura Chemical Co., Ltd., PUT # 500, thickness 35 μm) was cut into A4 size (length 29.7 cm × width 21 cm). The cellophane film was immersed in a room temperature ion-exchanged water bath for 24 hours to obtain a water-swollen cellophane paper. The water swollen cellophane paper was removed from the water bath, and the water swollen cellophane paper was sandwiched between nip rolls to remove water remaining on the surface.

  Adhesives 1, 2, and 3 suitable as water-soluble adhesives were each adjusted to a concentration (% by weight) of 5%, and the bar coater No. 32 was applied uniformly. Another water-swelled cellophane paper from which water was removed was layered on the surface to which the adhesive was applied. The two-layer laminate was sandwiched between nip rolls and pressed evenly to bring them into close contact with each other.

  The pressed two-layer laminate was placed on the surface of a smooth plate, and the surface was fixed. And it dried for 24 hours or more on conditions of 20 degreeC and relative humidity RH65%. A laminate using adhesive 1 (sodium carboxymethylcellulose) is used as prototype 1; a laminate using adhesive 2 (modified starch) is used as prototype 2; and a laminate using adhesive 3 (gum arabic) is prototyped. Example 3 was used.

[Adhesion result]
As a result of measuring the adhesive strength for each adhesive, Adhesive 1 (carboxymethylcellulose sodium) was 1.66 N / 15 mm wide. Adhesive 2 (modified starch) was 0.637 N / 15 mm wide. Therefore, the adhesive 1 (sodium carboxymethyl cellulose) is the most powerful when the cellophane film is laminated. Adhesive 2 (modified starch) was a material corresponding to a commercially available starch paste, and exhibited an adhesive effect.

[Evaluation of number of layers and physical properties]
Adhesive 1 (carboxymethylcellulose sodium) having the highest adhesive effect was prepared at a concentration (weight%) of 5% and used as the subsequent adhesive. Using the cellophane film (Putamura Chemical Co., Ltd., PUT # 500, thickness 35 μm) as described above, a laminate having two layers, four layers, and six layers was manufactured in a similar manner. Prototype examples 101, 102, and 103 were formed in the order of the number of stacked layers. Prototype examples 101, 102, and 103 have the softener removed and are not used.

  In addition to this, the cellophane film described above is immersed in a water bath of room temperature ion-exchanged water for 24 hours to form water-swollen cellophane paper, and then a softener bath (concentration 6.5% (volume by volume) in which glycerin as a softener is dissolved. %)) Was immersed in water-swelled cellophane paper for 2 hours. Then, it removed from the softening agent bath, the water swelling cellophane paper was pinched | interposed in the nip roll, and the water which remained on the surface was removed. Subsequent lamination of the water-swelling cellophane paper is the same as described above. Four and six water-swelling cellophane papers were laminated one by one. Prototype examples 201, 202, and 203 were formed in the order of the number of stacked layers. Prototype examples 201, 202, and 203 are added with a softener and become softener-use products.

For prototype examples 101, 102, and 103 and prototype examples 201, 202, and 203, after drying, the basis weight (g / m ² ), thickness (μm), longitudinal tensile strength (N / 15 mm width), longitudinal tension The elongation (%) and haze (%) were measured. Here, the longitudinal direction is a film forming direction (raw material winding direction) in which the cellophane film as a raw material is stretched. The tensile elongation (%) was determined as “(length after tension) ÷ (initial length) × 100”. The results are shown in Table 1.

  According to the results in Table 1, indices other than tensile strength increase in proportion to the increase in the number of laminated sheets. Therefore, it is possible to make a desired antistatic laminated cellophane (sheet-like material) by increasing or decreasing the number of cellophane films laminated. In addition, since the haze value is kept relatively low even when the number of stacked layers is increased, the transparency is the same as that of a normal transparent synthetic resin sheet. Therefore, it is suitable for applications requiring transparent beauty. Moreover, the influence of the use of the softening agent in the production stage occurred only for the tensile elongation. When the touch of the finished sheet-like material was confirmed, the softener-free product had a hard feel, and the softener-use product had a softer feel. From this, it can be properly used according to the use of the sheet-like material.

[Evaluation of antistatic performance]
Antistatic laminated cellophane (sheet-like material) prepared as the above-described prototype examples 101 to 103, 201 to 203, and an antistatic polyethylene terephthalate (PET) film (Futamura Chemical Co., Ltd., product number FE2301, thickness 25 μm), In addition, the charged voltage (kV), the half-life (sec), and the decay rate (%) were measured for an antistatic polypropylene (OPP) film (Futamura Chemical Co., Ltd., product number BNT, thickness 30 μm). These results are in Table 2.

  The antistatic laminated cellophane of the prototype example had a low charged voltage compared to other resin films regardless of the thickness and the presence or absence of a softening agent. Also, there is no half-life and it is completely attenuated. For this reason, it is very difficult to be charged, and it has a property of being discharged immediately. Such a performance is a very unique property that cannot be obtained from a film or sheet of a synthetic resin whose antistatic performance is enhanced by an existing antistatic agent or the like. Since cellulose, which is a constituent material of cellophane, is a sugar chain, it is considered that the molecule contains a relatively large amount of oxygen and hydrogen atoms, and is thus rich in polarity. Therefore, it can be said that the conductive performance is improved as compared with other synthetic resin films.

[Create article]
The inventors were convinced of the usefulness of the antistatic laminated cellophane from a series of circumstances. Therefore, an article using an antistatic laminated cellophane was actually made. The antistatic laminated cellophane used at this time is a finish that does not use a softener. A smooth cellophane film similar to the above (Futamura Chemical Co., Ltd., PUT # 500, thickness 35 μm). Adhesive 1 (carboxymethylcellulose sodium) adjusted to 5% concentration was used, and 5 water-swollen cellophane paper was used. A sheet was laminated. The creation conditions and the like are the same as in the case of the prototype.

  Then, in order to create a small box with a top and bottom lid from five sheets of antistatic laminated cellophane, a developed figure of a cube was cut out with glue margin using scissors and a cutter knife. Subsequently, a commercially available paper adhesive was applied to the paste margin to bond the antistatic laminated cellophanes together. Thereafter, the upper and lower lids were folded and bound into a cubic small box. FIG. 4 is an overall photograph thereof. The small box is 4.5 cm long, 4.5 cm wide, and 4.5 cm high.

  The manufacturing method of the antistatic laminated cellophane of this invention can manufacture the cellophane of thickness which was not able to be obtained in manufacture of the conventional cellophane film. Cellophane also has a unique high antistatic performance as well as biodegradability. For this reason, it is promising not only as a substitute for an existing synthetic resin film but also as a packaging material for articles requiring prevention of static electricity.

10, 10x, 10y Antistatic laminated cellophane 11 Cellophane film 11s Water-swelling cellophane paper 12 Adhesive surface 15 Water-soluble adhesive 50 Box 51 Side wall portion 52 Adhesive margin 53 Upper lid 54 Lower lid C Contents

Claims (5)

Charging characterized in that water-swelling cellophane paper is obtained by hydrating a plurality of cellophane films, carboxymethylcellulose is applied and laminated as a water-soluble adhesive between the water-swelling cellophane papers, and then dried. A manufacturing method of prevention cellophane. Water-swelling cellophane paper containing a plurality of cellophane films, and laminating by applying and decomposing starch decomposed by irradiating ultrasonic waves as a water-soluble adhesive between the water-swelling cellophane paper, A method for producing an antistatic laminated cellophane characterized by drying. The method for producing an antistatic laminated cellophane according to claim 1 or 2 , wherein the water-swelling cellophane papers are bonded together a plurality of times. The method for producing an antistatic laminated cellophane according to any one of claims 1 to 3 , wherein the softening agent in the cellophane film is removed when the cellophane film is hydrated. The method for producing an antistatic laminated cellophane according to any one of claims 1 to 4 , wherein the water-swelling cellophane paper is immersed in glycerin.

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