JP2867052B2 - Carton for wrap film having coating layer - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a carton for a wrap film having a coating layer of a coating composition.

2. Description of the Related Art As shown in FIG. 1, a carton for loading a wrap film made of a vinyl chloride resin film for food and beverage packaging wound on a paper core has an easy peeling property with respect to an adhesive. It consists of a box-shaped carton 13 having a rectangular cross-section made of cardboard 12 having a covering layer 11 having a lower bottom part.
At 14 is fixed a cutting blade C of a vinyl chloride resin film F for food and beverage packaging.

Wherein in the carton 13 of the wrap film, and its side wall portion 15 and the extended portion serving flap portion 16 is sealed by a partially adhered adhered by spot-like bonding portion S _1.

That is, the bonding portion S ₁ is formed in advance with a section where the coating layer 11 does not exist on a predetermined portion of the one side wall portion 15 of the carton 13, An adhesive S of a vinyl acetate emulsion type, which is a general-purpose adhesive for paper, is applied in a strip shape, and the paper layer 12 and the one side wall 15 as the back surface of the flap part 16 are covered with the coating layer 11 on the one side wall 15. Sealing is performed by so-called partial bonding in which only the non-existing sections are firmly bonded.

The wrap film carton has a spot-shaped bonding portion that fixes the flap portion 16 and the one side wall portion 15.
Above the S _1, it is opened by breaking the frangible line H which is formed in the flap portion 16.

Wherein the time of unsealing the wrapping film carton utilizing frangible line H, the coating layer 11 is spot-like bonding portion S ₁ of the compartment is not present, the carton 13 as shown in Figure 2
The one side wall portion 15 of the carton 13 is separated from the flap portion 16 so that a part of the flap portion is fixed to the surface of the one side wall portion 15 or the one side wall portion as shown in FIG. In the state where the adhesive S and one part of the thick paper 12 of the one side wall part 15 adhere to the back surface of the flap part 16, the one side wall part 15 and the flap part 16 of the carton 13 are broken. And separate.

Then, other than the bonding portion S ₁ spot-like forming a nonexistent section of the coating layer 11, moreover in the portion where the adhesive S resides,
Adhesive S and coating layer formed on the back surface of flap portion 16
As shown in FIG. 4, one side wall 15 of the carton 13 and the flap 16 remain in a state in which the adhesive S is adhered to the back surface of the flap 16 because of easy peeling between Separate in the state.

[Problem to be Solved by the Invention] The wrapping film carton 13 opened by the opening mechanism has a coating layer exhibiting easy peelability with respect to a vinyl acetate emulsion type adhesive S which is a general-purpose adhesive for paper. Therefore, a coating layer composed of a coating layer of an overprinting varnish mainly composed of a polyamide resin is conventionally formed.

However, the coating layer 11 mainly composed of the polyamide resin is formed of a plasticizer contained in the vinyl chloride resin film F accommodated in the carton, for example, an aliphatic dibasic ester plasticizer or a fatty acid ester plasticizer. Poor resistance to plasticizers such as plasticizers and higher fatty acids.

For this purpose, the coating layer 11 on one side wall portion 15 of the carton which comes into contact with the vinyl chloride resin film F while cutting and using the vinyl chloride resin film F contained in the carton one after another with the cutter C is used. Against film F
Not only causes a blocking phenomenon, but also the plasticizer subsequently penetrates the coating layer 11 to soften and dissolve the printing pattern layer under the coating layer 11, so that the ink of the printing pattern layer is applied to the wrap film F. It has the disadvantage of becoming metastatic.

On the other hand, the inventions of the present invention have excellent resistance to a plasticizer used in a vinyl chloride resin, and exhibit easy peelability to a vinyl acetate emulsion type adhesive. The present invention provides a wrap film carton provided with a coating layer having excellent adhesion to the surface of a wrap film.

[Means for Solving the Problems] The above-mentioned problems are solved by a wrap film carton provided with a coating layer of the present invention having the following configuration.

That is, the first invention is a carton for a wrap film, wherein the surface of a paper layer having a printed pattern layer on its surface is coated with a coating layer of the coating composition, The product is the following formula (1) or (2) based on 100 parts by weight of a mixed resin of 30 to 70 parts by weight of cellulose acetate butyrate and 70 to 30 parts by weight of an acrylic resin.
It comprises a composition containing the phosphoric ester compound represented by the formula in an amount of 0.5% by weight or more of the acrylic resin and 15 parts by weight or less based on 100 parts by weight of the mixed resin.

Further, the second invention is a carton for a wrap film, wherein the printed pattern layer surface of a paper layer having a printed pattern layer on its surface is coated with a coating layer of a coating composition, The product is cellulose acetate butyrate 30 ~
Mixed resin 10 of 70 parts by weight and 70 to 30 parts by weight of acrylic resin
The phosphoric acid ester compound represented by the following formula (1) or (2) is added to 0.5 part by weight of the acrylic resin to 0.5 part by weight.
% Or more and 15 parts by weight based on 100 parts by weight of the mixed resin.
It is contained within the range of not more than parts by weight, and furthermore, the vinyl chloride / vinyl acetate / vinyl alcohol copolymer is based on 100 parts by weight of the total amount of the cellulose acetate butyrate, the acrylic resin and the phosphate compound. It is composed of a composition contained in the range of 5 to 30 parts by weight.

In the carton for a wrap film having a coating layer according to the present invention having the above-mentioned structure, the cellulose acetate butyrate in the coating composition forming the coating layer is a plasticizer of a vinyl chloride resin, for example, an aliphatic dibasic acid. Although it has excellent resistance to plasticizers such as ester plasticizers, fatty acid ester plasticizers, and higher fatty acids, it has no property for paper adhesion.

For this purpose, the cellulose acetate butyrate is
Acrylic resins such as alkyl (meth) acrylates (eg, methyl, ethyl, n-butyl, di-butyl, t-
Butyl, 2-ethylhexyl, lauryl, etc.) or an acrylic resin such as a copolymer of the above-mentioned alkyl (meth) acrylate with styrene, α-methylstyrene, (meth) acrylonitrile, etc. This results in a composition having the required paper adhesion to paper.

However, when this acrylic resin is added, the resin film obtained from the composition tends to have a low peelability from a vinyl acetate emulsion type adhesive.

In the coating composition for forming the coating layer of the carton for a wrap film having the coating layer of each of the present invention described above, the addition of the acrylic resin lowers the easy peelability of the vinyl acetate emulsion type adhesive. Is compensated by the addition of the phosphate compound. However, since the addition of the phosphate compound causes a decrease in the resistance of the vinyl chloride resin to the plasticizer, the phosphate compound is added to 100 parts by weight of the mixed resin of cellulose acetate butyrate and the acrylic resin. 1
More than 5 parts by weight cannot be mixed.

For this reason, in a mixed resin of cellulose acetate butyrate and an acrylic resin, the acrylic resin is
It must be mixed at 70% by weight or less.

In addition, in the mixed resin of cellulose acetate butyrate and the acrylic resin, the mixing amount of the acrylic resin is
If the content is less than 30% by weight, the effect of paper adhesion provided by the mixing of the acrylic resin is not sufficient.
In a mixed resin of cellulose acetate butyrate and an acrylic resin, it is necessary that the acrylic resin is mixed at 30% by weight or more.

As described above, the phosphate compound added in order to prevent a decrease in the easy peeling property of a vinyl acetate emulsion type adhesive caused by adding an acrylic resin is, as described above, the following formula (1) or ( It is displayed by the expression 2).

Incidentally, preferred specific examples of the phosphate compound are:
In the above formula (1), a stearyl phosphate compound comprising R = C ₁₈ H ₃₇ −, m = 10 and R ¹ = hydrogen, and in the above formula (1), R = C ₁₈ H ₃₅ −, m = 7 , R ¹ = oleyl phosphate compound consisting of hydrogen; in the above formula (2), R = C ₉ H ₁₉ −, m = 4, R ¹ = nonylphenyl phosphate compound compound consisting of hydrogen; _{in, R = C 9 H 19 -} , m = 9, R 1 = C 9 H 19 · C 6 H 4 · (CH 2 CH 2 O)
_{And a} nononylphenyl phosphate compound comprising 9-.

The addition of the above-mentioned phosphoric ester compound also has an effect of improving the slipperiness of the obtained resin film, but as described above, it is easily peeled off from the vinyl acetate emulsion type adhesive generated by adding the acrylic resin. It is preferable that the amount is increased in accordance with the amount of the acrylic resin to prevent a decrease in the property of the acrylic resin. The effect of the addition of the acid ester compound becomes apparent.

Further, the vinyl chloride / vinyl acetate / vinyl alcohol copolymer in the coating composition for forming the coating layer of the wrap film carton having the coating layer of the second invention has an appropriate plasticity for the obtained film. At the same time, it also has the effect of improving the ease of peeling off the vinyl acetate emulsion type adhesive.

However, since the addition of a large amount of the vinyl chloride / vinyl acetate / vinyl alcohol copolymer causes a decrease in the plasticizer resistance of the resulting film, the cellulose acetate butyrate, the acrylic resin and the ( It must be added in an amount of 30 parts by weight or less based on 100 parts by weight of the total amount of the phosphoric ester compound according to the formula (1) or (2).

In addition, the effect on the plasticity of the film by the addition of the above-mentioned vinyl chloride-vinyl acetate-vinyl alcohol copolymer,
The effect of improving the easy peelability of the vinyl acetate emulsion type adhesive is 5 parts by weight or more based on 100 parts by weight of the total amount of cellulose acetate butyrate, acrylic resin and phosphate compound. If it is, the effect of the addition of the compound becomes clear.

The coating composition for forming the coating layer of the wrap film carton having the coating layer of the present invention includes, in addition to the above-described composition components, a plasticizer that is usually added to the coating layer forming composition. For example, a plasticizer such as a citrate ester, an adipic ester, a trimellitate ester, or a fatty acid ester, or a polyethylene wax or the like that provides a suitable slipperiness and improves abrasion resistance. Needless to say, it can be appropriately added as needed as long as the characteristics of the above are not impaired.

The plasticizer is added to the resin component in the composition by 2.5%.
It is preferable to add about 25 to 25% by weight of the polyethylene wax to about 2.5 to 25% by weight of the resin component in the composition.

[Examples] Hereinafter, the specific configuration of the wrap film carton having the coating layer of the present invention will be described with reference to examples.

Example 1 Gravure printing was applied to the entire surface of a cardboard (coated cardboard) having a basis weight of 350 g / m ² , and then a coating for forming a coating layer having the following composition [1] was applied to the printing surface. The coating agent was applied by gravure coating and dried to form a coating layer having a thickness of 3 μ, and a carton material [a] for a wrap film made of a vinyl chloride resin film was obtained.

Coating agent for forming coating layer [1] Cellulose acetate butyrate 8 parts by weight Acrylic resin 9 parts by weight (methyl methacrylate) Phosphate compound 1 part by weight (of polyoxyethylene nonyl phenyl ether Phosphate ester) Plasticizer 1 part by weight (tributyl acetylcitrate) Polyethylene wax 1 part by weight Toluene 22 parts by weight Methyl ethyl ketone 12 parts by weight Ethyl acetate 26 parts by weight Isopropyl alcohol 18 parts by weight Example 2 Gravure printing was applied to the entire surface of cardboard (coated cardboard) having a basis weight of 350 g / m ² , and then a coating for forming a coating layer having the following composition [2] was applied to the printing surface. The coating agent is applied by a gravure method and dried to form a coating layer with a thickness of 3μ. To obtain a down material [b].

Coating agent for coating layer formation [2] Cellulose acetate butyrate 8 parts by weight Acrylic resin 9 parts by weight (methyl methacrylate) Vinyl chloride / vinyl acetate / vinyl alcohol copolymer 2 parts by weight Phosphorus Acid ester compound 1 part by weight (phosphate ester of polyoxyethylene nonylphenyl ether) Plasticizer 1 part by weight (tributyl acetylcitrate) Polyethylene wax 1 part by weight Toluene 22 parts by weight Methyl ethyl ketone 12 Parts by weight Ethyl acetate 26 parts by weight Isopropyl alcohol 18 parts by weight Comparative Example 1 Gravure printing is applied to the entire surface of a thick paper (coated cardboard) having a basis weight of 350 g / m ² , and then the printing is performed. A coating agent for forming a coating layer having the following composition [3] is applied to the surface by a gravure coating method, dried, and 3μ
Was formed to obtain a cardboard [c] for comparison.

Coating agent for forming coating layer [3] Polyamide resin 25 parts by weight Nitrified cotton 5 parts by weight Paraffin wax 0.5 parts by weight Polyethylene wax 1 part by weight Toluene 34 parts by weight Ethyl acetate 10 Parts by weight Isopropyl alcohol 25 parts by weight Cardboard [a] obtained in the above Examples and Comparative Examples
Table 1 shows the results of tests performed on each coating layer of [c].

In the test, there were three types of plasticizer resistance to a plasticizer for a vinyl chloride resin, easy peelability to a vinyl acetate emulsion type adhesive, and paper adhesion in each coating layer of the cardboard. The test method is as follows.

Plasticizer resistance A product obtained by laminating 10 wrap films made of a commercially available vinyl chloride resin is sandwiched between two cardboards so that the coating layer surface of the cardboard comes into contact with the wrap film surface,
With a load of 100 g / cm ² applied from above, at 40 ° C, 90
After being left in a constant temperature / humidity bath at% RH for 2 hours, the coating layer surface of each cardboard was scratched with a nail or rubbed with a cotton cloth to observe the state of varnish removal of the coating layer.

Easy peelability to vinyl acetate adhesive Adhere the coating layer surface and the non-coat layer surface of two pieces of cardboard with a vinyl acetate emulsion type adhesive, dry, and peel off the coating layer surface and the non-coat layer surface Then, the ease of peeling at that time was observed.

Paper Adhesion A cellophane adhesive tape of 18 mm width [Nichiban Co., Ltd .: Cellotape] was attached to the coating layer surface of the cardboard, immediately peeled off, and the state of varnish removal attached to the adhesive tape was observed.

Is displayed.

[Operation and Effect of the Invention] The coating layer of the carton for a wrap film having the coating layer of the first invention is formed by the action of the cellulose acetate butyrate and the acrylic resin in the composition for forming the coating layer. Good resistance to plasticizers for vinyl chloride resin, and easy to peel off to vinyl acetate emulsion type adhesive, which decreases due to the addition of acrylic resin due to phosphate ester compound And the presence of an acrylic resin provides paper adhesion that cannot be achieved with cellulose acetate butyrate.

Further, in the coating layer of the wrap film carton having the coating layer of the second invention, the composition for forming the coating layer is obtained by using the composition for forming the coating layer of the first invention. Without impairing the effect of
The vinyl acetate-vinyl alcohol copolymer has the effect of improving the plasticity and the effect of further improving the easy peeling of the vinyl acetate emulsion type adhesive.

Therefore, the coating layer of the carton for a wrap film according to the first and second aspects of the present invention provides resistance to a plasticizer used for a vinyl chloride resin, adhesion to a paper surface, and a vinyl acetate emulsion type. And good properties with easy peelability to the adhesive.

For this reason, according to the carton for a wrap film having the coating layer according to the first and second inventions, the vinyl chloride resin film F contained in the carton is cut one after another by the cutter C for use. Then, the coating layer 11 on one side wall portion 15 of the carton in contact with the vinyl chloride resin film F
In contrast, the film F does not cause a blocking phenomenon, and therefore, the ink of the print pattern layer below the coating layer 11 does not transfer to the wrap film F,
It has excellent hygiene action as a wrap film for food and drink.

Furthermore, the carton for a wrap film of the present invention has excellent properties in abrasion resistance because the coating layer on the surface has excellent properties of adhesion to paper.

When the wrapping film carton of the present invention is opened, the carton for the wrapping film is bonded at the bonding portion between the front surface of the one side wall portion 15 and the back surface of the flap portion 16 and via the coating layer 11. In the part, by the easy peeling action on the vinyl acetate emulsion type adhesive that the coating layer 11 has,
A portion of the paper on the back surface of the flap portion 16 does not adhere to and remain on the surface of the coating layer 11, and after opening, a beautiful carton on the side surface is obtained.

[Brief description of the drawings]

Figure 1 is a model cross section of a carton wrap film inside is loaded view, FIG. 2, model showing an example of a state of separation adhesive portion S ₁ at the time of opening the carton shown in Figure 1 sectional view, FIG. 3 is a model sectional view showing another example of a state of separation adhesive portion S ₁ at the time of opening the carton shown in Figure 1,
FIG. 4 is a model cross-sectional view showing a separated state of the adhesive application section of the portion other than the bonding portion S ₁ at the time of opening the carton shown in Figure 1. 11 ... Coating layer, 12 ... Cardboard, 13 ... Box carton, 14 ... Bottom bottom of box carton 13, F ... Wrap film for food and beverage packaging, C ... Cut for wrap film cutting Cutting blade, 15: one side wall portion in carton 13, 16: flap portion, which is an extended portion, S _1: spot-shaped adhesive portion, S: adhesive.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-56-133352 (JP, A) JP-A-50-64321 (JP, A) JP-A-58-83035 (JP, A) JP-A 47-133 14952 (JP, A) JP-A-60-79070 (JP, A) JP-A-3-140959 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) C09D 101/14 C09D 133 / 04-133/16 C08K 5/521-5/523 B65D 85/676

Claims (2)

(57) [Claims] 1. A wrap film carton, wherein a printed pattern layer surface of a paper layer having a printed pattern layer on the surface thereof is coated with a coating layer of the coating composition, wherein the coating composition comprises: A phosphoric ester compound represented by the following formula (1) or (2) is added to 100 parts by weight of a resin mixture of 30 to 70 parts by weight of cellulose acetate butyrate and 70 to 30 parts by weight of an acrylic resin, A carton for a wrap film, comprising a composition containing 0.5% by weight or more of the base resin and 15 parts by weight or less based on 100 parts by weight of the mixed resin. 2. A carton for a wrap film, wherein a surface of a paper layer having a printed pattern layer on its surface is coated with a coating layer of the coating composition, wherein the coating composition comprises: A phosphoric ester compound represented by the following formula (1) or (2) is added to 100 parts by weight of a resin mixture of 30 to 70 parts by weight of cellulose acetate butyrate and 70 to 30 parts by weight of an acrylic resin, 0.5% by weight or more based on 100 parts by weight of the mixed resin and not more than 15 parts by weight based on 100 parts by weight of the mixed resin, and a vinyl chloride / vinyl acetate / vinyl alcohol copolymer is contained in the cellulose acetate butyrate. A carton for a wrap film, comprising a composition containing 5 to 30 parts by weight based on 100 parts by weight of a total of a rate, an acrylic resin and a phosphate compound.