JP2000290579A - Wrap film adhesive coating and wrap film carton - Google Patents

Abstract

PROBLEM TO BE SOLVED: To render it possible to obtain, easily by adjusting the compounding amount, the most suitable wrap film-adhering part for any wrap film by compounding a solvent, cellulose acetate butylate and a polyester plasticizer having a specific melting point. SOLUTION: A coating for forming a wrap film-adhering part is obtained by compounding 100 pts.wt. of cellulose acetate butylate, 25-110 pts.wt. of a polyester plasticizer having a melting point of -7 to 30 deg.C, 0.1-5 pts.wt., based on 100 pts.wt. of the total thereof, of silica and/or clay and a solvent. The coating for forming a wrap film-adhering part is applied and dried to form a cured coating film on a wrap film-adhering part 5 formed at a position which is at the central portion of the outer face side of a front face part 7 of the main body 1, the main body 1 having an exposed edge of a cutter 4 downward from the lower end of a front face part 6 of a lid body, and is concealed by a front face part of the lid body when the lid body 2 is put on. A wrap film 3 pulled out from a main body 1 is cut with a cutter 4 and subsequently a wrap film 3 left in the main body 1 side is adhered to the wrap film-adhering part 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carton for storing a roll-shaped wrap film, which is provided on an outer surface of a wrap film withdrawal side of the wrap film to form a wrap film close-up portion for preventing the drawn-out wrap film from rewinding. The present invention relates to a wrap film adhesive part forming paint and a wrap film carton having a wrap film adhesive part formed as a cured coating film of the wrap film adhesive part forming paint.

[0002]

2. Description of the Related Art Conventionally, as a coating material for forming a wrap film adhesion portion, a crosslinkable curing varnish based on an acrylic modified resin such as an epoxy acrylate or a polyester acrylate and crosslinked and cured by ultraviolet rays or the like (Japanese Patent No. 259)
No. 8642), a coating solution obtained by mixing two or more polyurethane-based prepolymers having different polyol molecular weights and elongation rates (Japanese Patent Laid-Open No. 10-35656), and a polyurethane-based prepolymer and a non-reactive acrylic resin. A coating solution of a composition containing the composition (JP-A-10-35657) is known.

[0003]

By the way, the wrap film contact portion is not practical simply by merely firmly contacting the wrap film and reliably suppressing rewinding. It is required that it not only exerts its effect but also does not cause blocking with the paper constituting the carton. That is, when peeling off the wrap film, the wrap film is not torn, and it does not peel off together with the wrap film, while exhibiting an appropriate adhesive force to the wrap film, for example, the carton in the unfolded state in the carton manufacturing process. Even if they are stacked, they must not adhere to overlapping cartons.

[0004] In the above-mentioned conventional lap film adhesion portion forming paint, even if the amount is adjusted, while satisfying the above conditions,
There is a problem that it is difficult to obtain wrap film contact portions corresponding to wrap films having different properties due to different materials. That is, typical wrap films that are currently frequently used include polyvinylidene chloride, polyvinyl chloride, polyethylene, and polymethylpentene, but the wrap film adhesion portion obtained by the conventional wrap film adhesion portion forming paint is: Both are suitable for vinylidene chloride and vinyl chloride wrap films, have slightly weaker adhesion to polyethylene wrap films, and adjust the blending amount for polymethylpentene and polyethylene wrap films. However, there is a problem that the adhesion is insufficient and a practical rewind prevention effect cannot be obtained.

The present invention has been made in view of the above-mentioned conventional problems, and can be easily applied to any wrap film of polyvinylidene chloride, polyvinyl chloride, polyethylene and polymethylpentene by adjusting the amount of wrap film. It is a first object of the present invention to provide a wrap film adhered portion forming paint capable of obtaining an optimal wrap film adhered portion. In addition, the present invention provides a wrap film carton having a wrap film adhesive portion that is practical for each case where the wrap film is any of polyvinylidene chloride, polyvinyl chloride, polyethylene, and polymethylpentene. The second purpose.

[0006]

In order to achieve the first object, the present invention provides a carton for accommodating a roll-shaped wrap film, which is provided on the outer surface of the wrap film withdrawal side for preventing the wrap film from being unwound. In the wrap film adhesion portion forming paint for forming the wrap film adhesion portion, in addition to a solvent, at least cellulose acetate butyrate and a polyester plasticizer having a melting point of -7 to -30 ° C are contained as main components. And a paint for forming a wrap film adhesion portion.

Further, according to the present invention, in order to achieve the second object, a carton for storing a roll-shaped wrap film of polyvinylidene chloride is provided on an outer surface of a wrap film drawer side of the carton.
A wrap film contact portion for preventing unwinding of the drawn wrap film is provided, and the wrap film contact portion is at least 25 to 90 weight parts per 100 parts by weight of cellulose acetate butyrate and cellulose acetate butyrate. Wrap film carton, characterized in that it is a cured coating containing as a main component a polyester plasticizer having a melting point of −7 to −30 ° C.

[0008] A wrap film close-contact portion is provided on an outer surface of a wrap film drawer side of a carton for storing a roll-shaped wrap film of polyvinyl chloride to prevent the drawn-out wrap film from rewinding. Is at least 40 to 100 parts by weight of cellulose acetate butyrate and 100 parts by weight of cellulose acetate butyrate, and has a melting point of −7 to −30 ° C.
A wrap film carton, which is a cured coating film containing a polyester plasticizer as a main component,

[0009] A wrap film close-contact portion for preventing rewinding of the drawn wrap film is provided on the outer surface of the wrap film drawer side of the carton that stores the roll-shaped wrap film of polymethylpentene or polyethylene. A cured coating film in which the adhesion portion contains at least cellulose acetate butyrate and a polyester plasticizer having a melting point of -7 to -30 ° C and 40 to 110 parts by weight based on 100 parts by weight of cellulose acetate butyrate. And a wrap film carton.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a lap film adhesive portion forming paint according to the present invention will be described.

The coating material for forming a wrap film adhered portion according to the present invention contains, as components other than the solvent, cellulose acetate butyrate and a polyester plasticizer having a melting point of -7 to -30 ° C as main components. Here, the main component means 90% by weight or more. This cellulose acetate butyrate has a melting point of −7 to −30 ° C.
By forming a wrap film adhesive part forming coating containing a polyester plasticizer as a main component, the wrap film adhesive part obtained as a cured coating film by adjusting the blending ratio of the two is wrapped with various materials. Can be adapted to film. In other words, while preventing blocking with the paper constituting the carton, the wrap film adheres not only to the wrap film of polyvinylidene chloride or polyvinyl chloride, but also to the wrap film of polyethylene or polymethylpentene. Parts can be easily obtained.

The polyester plasticizer used in the present invention is preferably, for example, a straight-chain dibasic polyester plasticizer such as adipic acid, sebacic acid or phthalic acid.
Among them, an adipic acid-based polyester plasticizer (ester polymer of adipic acid and a polyhydric alcohol) is most preferable.
In the present invention, among these polyester plasticizers, those having a melting point of −7 to −30 ° C. are particularly used. When the melting point is higher than this range, it is difficult to obtain the necessary adhesive strength, and when the melting point is lower than this range, the adhesive strength becomes excessively high and blocking with the paper constituting the carton is liable to occur.

The mixing ratio of cellulose acetate butyrate and polyester plasticizer is such that the polyester plasticizer is 100 parts by weight of cellulose acetate butyrate and the polyester plasticizer is 25 to 110 parts by weight of cellulose acetate butyrate. It is preferably in parts by weight. If the blending amount of the polyester-based plasticizer is too small, it is difficult to obtain the necessary adhesion, and if the blending amount of the polyester-based plasticizer is too large, the adhesion may become excessively high,
Blocking with the paper constituting the carton is likely to occur.

It is preferable that one or both of silica and clay are added to the lap film adhesive portion forming paint of the present invention. The amount of addition is 100% of the total amount of cellulose acetate butyrate and polyester plasticizer.
It is preferably in the range of 0.1 to 5 parts by weight for each part by weight. When silica is added, the silica adsorbs the polyester plasticizer, which reduces the adhesion due to leaching of the polyester plasticizer from the adhered portion of the formed wrap film and the phase of the paint forming the adhered portion of the present wrap film. Separation can be prevented. In addition, when clay is added, the friction resistance of the obtained wrap film adhered portion is improved, and it is easy to prevent a decrease in the adherence due to rubbing of products during manufacture. In both cases, if the addition amount is too small, the above-mentioned effects are hardly obtained, and if the addition amount is too large, the adhesion of the obtained wrap film adhesion portion tends to decrease.

In addition to the silica and clay described above, a small amount of, for example, a colorant can be added to the coating material for forming the adhesive portion of the wrap film of the present invention, if necessary. Also, as the solvent,
For example, ethyl acetate, toluene, isopropyl alcohol and the like can be used.

Next, a wrap film carton according to the present invention will be described with reference to FIG.

In FIG. 1, 1 is a main body, 2 is a lid, 3 is a wrap film, 4 is a cutter, and 5 is a wrap film contact portion.

In the illustrated wrap film carton, the cutting edge of the cutter 4 is exposed downward from the lower end of the lid front surface portion 6.
And at a position covered by the cover front surface 6 when the cover 2 is closed.

The wrap film 3 is wound into a roll and housed in the main body 1, pulled out toward the front surface of the main body 1 by a required length, cut by a cutter 4, and used. This cutting of the wrap film 3 is performed by pulling out the wrap film 3 by a required length, then closing the lid 2,
This is performed by pressing the wrap film 3 against the cutter 4 in a state where the wrap film 3 is sandwiched between the lid front part 6 and the main body front part 7. At this time, the leading end of the wrap film 3 remaining on the main body 1 is in close contact with the wrap film close-contact portion 5, and is prevented from being rewound into the main body 1.
Therefore, at the time of the next use, the tip of the wrap film 3 can be easily grasped and pulled out.

The wrap film contact portion 5 of the wrap film carton according to the present invention is formed as a cured coating film obtained by applying the above-described wrap film contact portion forming paint to a predetermined portion subjected to anchor treatment and drying. The mixing ratio of cellulose acetate butyrate and a polyester plasticizer having a melting point of −7 to −30 ° C. is adjusted depending on the material of the wrap film 3.

When the wrap film 3 is made of polyvinylidene chloride, the wrap film adhered portion 5 has at least 25 to 80 parts by weight of cellulose acetate butyrate and 100 to 100 parts by weight of cellulose acetate butyrate and a melting point of -7 to- A cured coating film containing a polyester plasticizer at 30 ° C. as a main component (90% by weight or more). If the amount of the polyester plasticizer is less than 25 parts by weight, the adhesion to the wrap film 3 tends to be insufficient. If the amount of the polyester plasticizer exceeds 90 parts by weight, blocking with the paper constituting the carton occurs. Or the adhesive strength to the wrap film 3 tends to be excessive.

When the wrap film 3 is made of polyvinyl chloride, the wrap film adhesion portion 5 has at least 40 to 100 parts by weight of cellulose acetate butyrate and 100 parts by weight of cellulose acetate butyrate, and has a melting point of -7 to- A cured coating film containing a polyester plasticizer at 30 ° C. as a main component. If the amount of the polyester plasticizer is less than 40 parts by weight, the adhesion to the wrap film 3 tends to be insufficient. If the amount of the polyester plasticizer exceeds 100 parts by weight, blocking with the paper constituting the carton occurs. Or the adhesive strength to the wrap film 3 tends to be excessive.

When the wrap film 3 is made of polymethylpentene or polyethylene, the wrap film adhered portion 5 has at least 40 to 40 parts by weight of cellulose acetate butyrate and 100 parts by weight of cellulose acetate butyrate.
A cured coating film containing 110 parts by weight of a polyester plasticizer having a melting point of -7 to -30 ° C as a main component. If the amount of the polyester plasticizer is less than 40 parts by weight, the adhesion to the wrap film 3 tends to be insufficient, and if the amount of the polyester plasticizer exceeds 110 parts by weight, blocking with the paper constituting the carton occurs. It will be easier.

Particularly when the wrap film 3 is made of polymethylpentene, the melting point of the polyester plasticizer is -20 to 20.
Preferably it is -30 ° C. When the wrap film 3 is made of polymethylpentene, a polyester plasticizer having a melting point of −7 ° C. or more and less than −20 ° C. tends to have reduced adhesion in a low-temperature (15 ° C.) environment.
When a polyester plasticizer at −30 ° C. is used, it is easy to prevent a decrease in adhesion in a low-temperature environment.

In the wrap film contact portion 5 provided in the wrap film carton according to the present invention, as described in the description of the wrap film adherent portion forming paint according to the present invention, a linear plasticizer is used as the polyester plasticizer. A basic acid-based polyester-based plasticizer is preferred, and among them, an adipic acid-based polyester-based plasticizer (ester polymer of adipic acid and a polyhydric alcohol) is most preferred. Further, it is preferable to contain 0.1 to 5 parts by weight of silica or 0.1 to 5 parts by weight of clay based on 100 parts by weight of the total amount of cellulose acetate butyrate and polyester plasticizer. Further, in addition to the silica or clay, for example, a coloring agent or the like can be added in a small amount as needed.

[0026]

EXAMPLES Example 1 The following cellulose acetate butyrate (hereinafter referred to as “CA”)
B)), an adipic acid-based polyester-based plasticizer (hereinafter referred to as “plasticizer”), silica and clay, and the amount of the plasticizer with respect to the amount of CAB (in terms of solid content) is shown in Table 1. The wrap film carton as described with reference to FIG. 1 was produced using the wrap film adhesion portion forming paint (hereinafter referred to as “paint”) which was changed to the following. In addition, silica and clay were added in an amount of 2 parts by weight with respect to 100 parts by weight of the total amount of the CAB (in terms of solid content) and the amount of the plasticizer in each paint.

CAB: "C" manufactured by Eastman Chemical Company
AB551-0.01 "(solid content 40% by weight)-Plasticizer:" Polysizer W "manufactured by Dainippon Ink and Chemicals, Inc.
360EL "(melting point -12 ° C) ・ Silica:“ R-976 ”manufactured by Nippon Aerosil Co., Ltd. ・ Clay:“ Translink 55 manufactured by Angel Hard ”
5) Each of the produced wrap film cartons is provided with polyvinylidene chloride (hereinafter referred to as “PVDC”), polyvinyl chloride (hereinafter referred to as “PVC”), polyethylene (hereinafter referred to as “PE”), and polymethylpentene (hereinafter referred to as “PMP”). )
Each roll of wrap film is stored at 25 ° C and 15 ° C.
Withdrawal and cutting were repeated under an atmosphere of ° C. to evaluate the use condition. Table 1 shows the results. The evaluation result criteria are as follows.

：: The end portion stayed in the adhesive layer of the wrap film with good adhesiveness after cutting, and the wrap film could be peeled off without a large resistance upon the next drawing.

△ ₁ : The edge is not rewinded after cutting, but has a slightly weak adhesion and a sense of instability.

[0030] △ _2: lap time of peeling of the film, what is the separation of the tear and wrap film adhesion portion of the wrap film did not occur, was strong resistance feeling.

× ₁ : The adhesive force of the wrap film contact portion was weak, and the end portion was rewound after cutting.

× ₂ : The adhesive force of the wrap film contact portion was too strong, and the wrap film was torn or the wrap film contact portion was peeled off when the wrap film was peeled off.

Example 2 The wrapped film cartons prepared in Example 1 were stacked in an unfolded state, and a 12.5 kg weight was placed between the flat plates in a state of being sandwiched between flat plates.
After standing for 4 hours, the state of occurrence of blocking with paper was examined. Table 1 shows that no blocking occurred and "No" when blocking occurred and "Yes" when blocking occurred.

[0034]

[Table 1]

Example 3 A wrap film carton was prepared in the same manner as in Example 1 except that the plasticizer used was changed to
The same use condition evaluation as in Example 1 under the atmosphere of 5 ° C. and the same blocking test on paper as in Example 2 under the atmospheres of 25 ° C. and 15 ° C. were performed. Table 2 shows the results.

Plasticizer: "Polysizer W141OD" manufactured by Dainippon Ink and Chemicals, Inc. (melting point-25 ° C)

[0037]

[Table 2]

COMPARATIVE EXAMPLE 1 A wrap film carton as shown in FIG. 1 was prepared using the paints A, B, and C shown below, and the state of use was evaluated in the same manner as in Example 1. Table 3 shows the results.

Paint A: Acrylic UV-curable resin paint Paint B: 50 parts by weight of a polyurethane resin solution (solid content: 30% by weight) having a polyol molecular weight of 1,000 to 1,500 and an elongation of 22%, and a polyol molecular weight of 2,000 ~ 25
Polyurethane resin (solid content 3
Coating C: 50 parts by weight of a polyurethane prepolymer solution (solid content: 50% by weight) having a polyol molecular weight of 1500 to 2000 and an elongation of 160%, and a non-reactive acrylic Diluent mixed with 50 parts by weight of resin solution (solid content 50% by weight)

[0040]

[Table 3]

[0041]

As is clear from Table 1, the coating material for forming a wrap film adhered portion of the present invention is prepared by adjusting the blending amount of a polyester plasticizer having a melting point of -7 to -30 ° C with respect to cellulose acetate butyrate. It is possible to easily form a wrap film contact portion suitable for wrap films of a wide range of materials. In addition, the wrap film carton of the present invention is provided with a wrap film adhesive portion that can be practically used for each wrap film of polyvinylidene chloride, polyvinyl chloride, polyethylene, and polymethylpentene, thereby preventing the wrap film from rewinding. Is what you can do.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a wrap film carton according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 3 Wrap film 4 Cutter 5 Wrap film adhesion part 6 Lid front part 7 Main part front part

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E060 AB13 BA13 BC04 BC08 DA17 EA08 EA14 3E062 AA20 AB12 LA01 LA17 LA25 4J038 BA041 DD002 DD082 HA446 KA06 KA10 PB04

Claims (10)

[Claims] 1. A wrap film adhesion part forming paint for forming a wrap film adhesion part for preventing rewinding of a drawn wrap film on an outer surface of a wrap film drawer side of a carton storing a roll-shaped wrap film, A coating material for forming a wrap film adhesion portion, comprising as a main component, in addition to a solvent, at least cellulose acetate butyrate and a polyester plasticizer having a melting point of -7 to -30 ° C. 2. Cellulose acetate butyrate 100
2. The lap film adhesion portion forming paint according to claim 1, wherein the polyester plasticizer is 25 to 110 parts by weight with respect to parts by weight. 3. The amount of 0.1 parts by weight based on 100 parts by weight of the total amount of cellulose acetate butyrate and polyester plasticizer.
3. The wrap film adhesion portion forming coating composition according to claim 1, wherein the coating material contains at least one of silica and 0.1 to 5 parts by weight of 1 to 5 parts by weight. 4. The polyester plasticizer according to claim 1, wherein the polyester plasticizer is an adipic acid polyester plasticizer.
(3) Any one of the wrap film adhesion part forming paints. 5. A wrap film close-contact portion for preventing the drawn-out wrap film from rewinding is provided on an outer surface of a wrap film drawer side of a carton storing a roll-shaped wrap film of polyvinylidene chloride. The adhesion portion is made of at least cellulose acetate butyrate and cellulose acetate butyrate 10
Melting point of -7 to -3 at 25 to 90 parts by weight per 0 parts by weight
A wrap film carton, which is a cured coating film containing a polyester plasticizer at 0 ° C. as a main component. 6. A wrap film close-contact portion for preventing rewinding of the drawn wrap film is provided on an outer surface of a wrap film drawer side of a carton for storing a roll-shaped wrap film of polyvinyl chloride. The adhesion portion is at least 40 to 100 parts by weight based on 100 parts by weight of cellulose acetate butyrate and cellulose acetate butyrate, and has a melting point of -7 to -30.
A wrapped film carton, which is a cured coating film containing a polyester plasticizer at a temperature of ℃ as a main component. 7. A wrap film contact portion for preventing unwinding of a drawn wrap film is provided on an outer surface of a wrap film drawer side of a carton storing a roll wrap film of polymethylpentene or polyethylene. The wrap film adhered portion contains at least cellulose acetate butyrate and a polyester-based plasticizer having a melting point of -7 to -30 ° C and a melting point of -7 to -30 ° C with respect to 100 parts by weight of cellulose acetate butyrate. Wrap film carton characterized by being a coating film. 8. A polyester plasticizer having a melting point of -20 to -30.degree. C. at a wrap film contact portion of the wrap film carton according to claim 7, wherein a roll film of polymethylpentene is stored. Wrap film carton. 9. The cured coating film comprises 0.1 to 5 parts by weight of silica or 0.1 to 5 parts by weight of clay based on 100 parts by weight of the total amount of cellulose acetate butyrate and polyester plasticizer. The wrap film carton according to any one of claims 5 to 8, wherein the wrap film carton contains at least one of: 10. The polyester plasticizer according to claim 5, wherein the polyester plasticizer is an adipic acid polyester plasticizer.
~ 9 any of the wrap film cartons.