JP3435617B2 - Paper cloth for surface materials such as various packing materials, bags and boxes - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper cloth produced by subjecting a paper cloth base paper to processing such as impregnation, various coatings, and embossing, and more specifically, texture, gloss, water resistance, oil resistance, and post-processing property. It has excellent printing strength, embossing and adhesiveness, and when peeled from the adhesive surface after packaging, it was revealed that the coat layer was completely peeled off and opened again.
The present invention relates to a paper cloth that can be bonded and used as a packaging material for preventing the risk of forgery and falsification.

[0002]

2. Description of the Related Art Paper cloth is used as a surface material for various packaging materials, bags, boxes and the like.

In consideration of environmental problems, the coating technique applied to cloth base paper has recently changed from a solvent system to a water system, and new fields have been pioneered in the field of use. With its single function of being excellent, glossy, and water / oil resistant, more advanced properties are required.

On the other hand, in the case of a special purpose, for example, packing of medicines or the like, a paper seal (in case of removing the article during transportation and storage and repairing it in its original condition) It has been proposed to use a tearable seal.

However, the use of such a fragile material as a paper seal (seal) significantly lowers the workability and causes difficulty in manufacturing the paper itself, which may be a costly cause. In addition, it is unavoidable that the design and the like will be standardized, because the packaging must be in a form that will never be removed from other than the sealed portion.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a paper cloth itself has a function of preventing re-adhesion after opening, and a general product is used without requiring a special sealing paper (seal). It was made possible. For example, the effect is great and clear in a medical package in which the storage of medicines such as morphine is strictly controlled.

[0007]

DISCLOSURE OF THE INVENTION As a result of intensive studies to improve the above-mentioned problems of the prior art, the inventors of the present invention have provided a protective layer on at least one pigment layer on a support, A methacrylic amide resin is used as the protective layer, the interlayer / intralayer peel strength of the support is further specified within a certain range, and the coating amount of the pigment layer and the protective layer is controlled to control the present invention. It came to completion. Sanawa
Then, various packaging materials according to the present invention, surface materials such as bags and boxes
Paper cloth for use is high-quality paper, medium-quality paper, glossy paper, kraft paper
A paper cloth having at least one or more pigment layers and a coating layer consisting of a protective layer covering the pigment layer on a support made of a paper cloth base paper such as , wherein the protective layer is a methacrylic amide resin. Peel strength of the support as the main component
Degree of the coating layer and the support of the coating layer during manufacturing and processing.
The support, which is the material, is not broken, and the entire coating layer is
1.5-6.0 kg / c so that it can be peeled off together with the support
It is formed in the range of m. Further, various types according to the present invention
Paper cloth for surface materials such as packing materials, bags, boxes, etc.
The coating weight of the pigment layer is 1 to 25 g / m ² . further
For various packaging materials according to the present invention, surface materials such as bags and boxes
The paper cloth has a coating weight of the protective layer of 1 to 5 g / m ²
Is.

As a result, the present invention provides a special paper seal.
It is possible to eliminate a uniform design by using a package that does not need to be used) and that must be packed in such a form that it can never be pulled out from other than the sealed part. A paper cloth characterized by having high functionality (complete peeling of the coating layer only under certain conditions) without being bound by work was obtained.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In the paper cloth of the present invention, the protective layer prevents physical loss of the pigment layer (discoloration) from the support and has physical properties required as a protective layer such as water resistance and oil resistance. The selection of the resin as the main component is important for satisfying the suitability for post-processing, and the methacrylic amide-based resin satisfies that condition.

The methacrylic amide resin preferably contains as little as possible components other than resin components (surfactant, etc.) for adhesion to itself or a sealing paper (seal). For example, Mitsui Toatsu Co., Ltd. Barrier Star-B-1000 corresponds to this.

The protective layer may contain a leveling agent, an antifoaming agent or the like for improving workability during coating, and a wax or the like for improving post-processability.

The pigment layer may contain a dispersant, a defoaming agent, a leveling agent, etc., if necessary, in addition to various inorganic or organic dyeing pigments and adhesives which are the main components.
None of these limits.

A paper base is generally used as the support. For example, any of high-quality paper, medium-quality paper, kraft paper, single-glossy paper and the like can be used.

The interlaminar / intra-layer peeling strength of the support is such that the coating layer comprising the pigment layer and the protective layer and the support which is the support material of the coating layer are not broken during the production / processing, 1.5-6.0k for the whole layer to peel with the support
The range is g / cm. More preferably 1.5 to 4.0.
The range is kg / cm. Peel strength between layers is 1.5
If it is less than kg / cm, the support may be broken during manufacturing and processing, which is not preferable. Also, 6.0 kg / cm
Above the range of 1, it is not desirable because the entire coated layer does not peel off together with the support.

The coating weight of the pigment layer is 1 to 25 g /
m ² , more preferably 5 to 20 g / m ² . When the coating amount exceeds 25 g / m ² , similar performance is obtained although it is not desirable in consideration of cost and workability of the coater.

The coating weight of the protective layer is 1 to 5 g / m.
² , more preferably ^{2 to 4} g / m ² . 5 g / m ²
Coatings exceeding 5 are not desirable for reasons such as cost increase and curling, but similar performance can be obtained. 1 g
If it is less than / m ² , water resistance and oil resistance are poor. The coating method includes various coaters, for example, a rod coater, a blade coater,
Roll coater, gravure coater, comma coater,
A commonly used one such as a lip coater can be applied.

[0017]

EXAMPLES The present invention will be described in more detail with reference to the following examples and comparative examples. In addition, all the numbers of the examples and the comparative examples are based on weight (packed form conversion). Example 1 (1) 212.8 parts by weight of styrene / acrylic type latex (styrene / acrylic type latex by Nippon Carbide Co., Ltd .: trade name Nikasol RX284S) in 106.4 parts by weight of water for preparing the pigment layer 1 , 3 kinds of dyeing pigments (manufactured by Sanyo Dye Co.
acol NSBlue KRN, Emacol NS
Carmin FB and Emacol NS W
hite PM-43) 71.0, 35.
Add 3,180.3 parts by weight to adjust the solid content to 38%.

(2) With respect to 575.0 parts by weight of the prepared water of the protective layer 1, 2 parts of isopropyl alcohol were added.
8.0 parts by weight, methacrylic amide resin (methacrylic amide resin manufactured by Mitsui Toatsu Co., Ltd .: trade name Barista-B-1000) 500.0 parts by weight, crosslinking agent (cationic polyamide resin manufactured by Japan PMC Co., Ltd.) A solid content was obtained by adding 40.0 parts by weight of the product name paper strength agent WS-500C) and 7.0 parts by weight of a release agent (hydrocarbon / olefin resin manufactured by Daiwa Chemical Industry Co., Ltd .: product name Coatizer-KS). Concentration 1
Adjust to 0%.

(3) Coating The liquid of the above-prepared pigment layer 1 is coated on a support (single gloss kraft base paper 60 g / m ² : peel strength 1.5 kg / cm) to a coating amount of 10 g / m ^2. Was coated with an air knife coater. Then, the liquid of the above-prepared protective layer 1 was coated on the pigment layer 1 with an air knife coater so that the coating amount was 3 g / m ² . (4) Embossing The coated paper coated as described above is embossed (canvas) on one side with a speed of 50 m / min, a pressure of 70 kg / cm (linear pressure), and an engraving roll of 250 mm (standard diameter). And processed with an embossing calendar.

Example 2 (1) 106.4 parts by weight of water for preparing the pigment layer 2 was mixed with styrene / acrylic latex (styrene / acrylic latex manufactured by Nippon Carbide Co., Ltd .: trade name Nikasol RX284S) 212. 8 parts by weight, 2 kinds of pigments for dyeing (manufactured by Sanyo Dye Co .: trade name Em
acol NSOcher and Emacol NS
White PM-43) 10.2, 20 respectively
Same as Example 1 except that 2.7 parts by weight was added to prepare a solid content concentration of 41%.

Example 3 The coating amount of the pigment layer 1 was 1 g / m ² and the coating amount of the protective layer was 10 g.
The procedure is the same as in Example 1 except that g / m ² is used.

Example 4 The coating amount of the pigment layer 2 was 30 g / m ² , and the coating amount of the protective layer was 1
The same as Example 2 except that g / m ² was used.

Example 5 The same as Example 1 except that 60 g / m ² of single-gloss kraft base paper having a support peeling strength of 4.0 kg / cm was used.

Example 6 The same as Example 1 except that 60 g / m ² of single-gloss kraft base paper having a support peeling strength of 5.5 kg / cm was used.

Comparative Example 1 The paper cloth obtained in Example 1 without applying the protective layer 1 liquid.

Comparative Example 2 The same as Example 1 except that the coating amount of the protective layer 1 liquid was 0.4 g / m ^{2 in} Example 1.

Comparative Example 3 The support was changed in Example 2 (50 g of a piece of kraft base paper /
m ^2: Peel strength 6.5 kg / cm) others are the same as in Example 2.

Comparative Example 4 The support was replaced in Example 1 (single gloss kraft base paper 60 g /
m ^2: Peel strength 1.0 kg / cm) others are the same as in the first embodiment.

Table 1 shows the evaluation results for each of the examples and comparative examples.

[Table 1]

The evaluation method of each characteristic in each example and comparative example is as follows. Gloss (%) Measuring method: Gross meter-75 ° -75 ° Water resistance Measuring method: Gakushin type abrasion resistance tester, load 200g, 5 times Caraco (cotton cloth) moistened with water (1-2 drops) Rub the printing surface with. Evaluation 5: No contamination was observed 4: Contamination between 5 and 3 3: Clear contamination 2: Intermediate contamination between 3 and 1: 1: Significant contamination

[0031] Seal peeling   Measurement method: Cellophane adhesive tape on the coated surface (Nichiban: trade name Cello Tape N)             o. 405) 18mm width 5cm length stuck, 2kg roll             After crimping back and forth once, peel off at once.   Evaluation Peel from support: ◎             There is 1-2 picking: ○ to △             Do not peel from support: × Discoloration   Measurement method: Gakushin type friction resistance tester, load 500g, 100 times             Rub the printed surface with a charcoal (cotton cloth).   Evaluation 5: No contamination is observed             Pollution between 4: 5 and 3             3: Contamination is clear             Pollution between 2: 3 and 1             1: Significant pollution

[0032] Print strength   Measurement method: RI tester tack 20, 60 rpm, single printing   Good evaluation: ◎             Break: × Oil resistance   Measuring method: Oil absorption test   Evaluation 1000 seconds or more is ◎ (pass).

[0033] Embossing suitability   Evaluation Releasability from engraving roll and peeling of coat layer             Good: ◎             Attach to engraving roll: × Adhesiveness   Evaluation Vinyl acetate bond (Konishi Co., Ltd .: trade name bond for woodworking summer / winter combination C             H18) glue the coated surface to the coated surface and leave it under a load of 500 g for 24 hours.             ◎ (Pass) if the paper is destroyed when peeled after placing.

[0034]

As can be seen from the above description, the present invention is a paper cloth comprising a support and a coating layer comprising at least one pigment layer and a protective layer for coating the pigment layer.
Since the protective layer is mainly composed of methacrylic amide resin, no special sealing paper (seal) is used, and the packing is in a form that cannot be extracted from other than the sealed part. As a result, the paper cloth itself can have a function to prevent re-adhesion after opening, resulting in elimination of uniform design and high functionality without being bound by difficult work (constant The coating layer can be completely peeled off only under the condition of.

The coating weight of the pigment layer is 1 to 25 g / m.
^Since it was specified in ² , the cost is high and the cost is high.
The coating weight of the protective layer is specified to be ¹ to 5 g / m ² , so there is no cost increase, no curling occurs, and water and oil resistance are excellent. You can get what you want.

In the present invention, the peel strength between the layers of the support is 1.5 to 4 kg / cm. Therefore, the coated layer comprising the pigment layer and the protective layer and the support of the coated layer during production and processing. The support, which is a material, is not broken, and the entire coating layer is peeled off together with the support.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI D21H 27/10 D21H 27/10 (56) Reference JP-A-5-339897 (JP, A) JP-A-57-171795 (JP , A) JP-A-2-269899 (JP, A) JP-A-61-273340 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) D21H 11/00-27/42 B32B 1/00-25/00 B65D 1/00-91/00

Claims (3)

(57) [Claims] 1. A high- quality paper, a medium-quality paper, a glossy paper, a kraft paper, etc.
A paper cloth comprising at least one or more pigment layers and a coating layer comprising a protective layer for coating the pigment layer on a support made of any one of the paper cloth base papers , the protective layer mainly comprising a methacrylic amide resin. As a component and peel strength of the support
Is a coating layer and a support material for the coating layer during manufacturing and processing.
The support is not broken and the entire coating layer is supported.
1.5 to 6.0 kg / cm so that it can be separated together with the holder
Various packaging materials, bags, characterized by being formed in the range of
Paper cloth for surface materials such as boxes . 2. The coating weight of the pigment layer is 1 to 25 g /
Various packing materials according to claim 1, wherein the packing material is m ^2.
Paper cloth for surface materials such as materials, bags and boxes . 3. The coating weight of the protective layer is 1 to 5 g / m.
According to claim 1 or 2, wherein various ships, characterized in that a ²
Paper cloth for surface materials such as packaging materials, bags and boxes .