JP3659100B2 - Concealment paper, concealment label and concealment wrapping paper using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a concealing paper provided with concealing properties without using an aluminum foil or an aluminum vapor deposition layer, a concealing label having good washing properties using the concealing paper as a label substrate, and the concealing paper The present invention relates to a concealing wrapping paper used for packaging various articles to be packaged.
[0002]
[Prior art]
For example, as a concealing paper, a paper label of a bottle container such as a glass bottle filled and packaged with liquid contents such as beer, happoshu, and sake is generally provided with a clay coat layer on a base paper such as pure white paper. Coated paper, art paper and the like of about 15 g to 200 g / m ² are used. Among them, for beer bottle labels, coated paper and art paper of about 40 to 80 g / m ² are frequently used.
[0003]
In addition, the design of the beer brand of the label attached to the beer bottle, the provision of concealment of the label, and the washing of the bottle by the washing machine after the bottle is collected through production and market distribution and the label removal in the label removal Aluminum vapor-deposited paper label consisting of paper substrate / deposition precoat layer / aluminum vapor deposition layer / primer layer / printing layer / overcoat layer provided with a clay coat layer, taking into account the water resistance and the suitability of the bottle for alkaline washing. Are used frequently, and examples of such aluminum vapor-deposited paper labels include No. 5-8615 and No. 5-8625.
[0004]
These aluminum vapor-deposited paper labels are provided with an aluminum vapor-deposited layer having a thickness of about 400 to 500 mm, and the label affixed to the bottle with casein glue or the like conceals the aluminum vapor-deposited layer (opaque and light-shielding). ), Water resistance to prevent see-through of bottle color and casein paste (eg brownish brown), soak in labels when immersed in an open chilled water tank for refrigeration, and dew condensation when removed from refrigerator It plays a role in preventing see-through and wrinkles due to water immersion and dropping of the label itself from the bottle.
[0005]
These aluminum vapor-deposited paper labels are expected to have the functions of the aluminum vapor-deposited layer, and in order to reduce the amount of label material, reduce the amount of label waste generated when washing bottles, increase the efficiency of label removal, and reduce the cost of materials, Paper (for example, coated paper) has a base paper weight close to the limit of art paper or coated paper, and therefore has low light shielding properties and water resistance.
[0006]
For example, the aluminum-deposited paper labels for many beer bottles, 45 g / m ² on a paper substrate having a clay court of 10 to 20 g / m ² before and after the sheet, evaporation precoat layer / aluminum deposition layer / primer layer / The print layer / overcoat layer is laminated in this order.
[0007]
In addition, such an aluminum vapor-deposited paper label is heated to a high temperature while supplying lump or wire-like aluminum in a high vacuum exhaust state in a vapor deposition apparatus, and adhered to the surface of the substrate to be vapor-deposited as aluminum vapor. Manufactured by forming a glossy aluminum deposition layer.
[0008]
At this time, in order to receive high-temperature aluminum vapor deposition on the surface of the substrate to be vapor-deposited, firmly fix the received aluminum vapor, and to obtain an aluminum vapor-deposited layer having a smooth surface, aluminum vapor deposition is performed on the precoat layer for vapor deposition. Apply.
[0009]
The precoat layer for vapor deposition can catch high-temperature aluminum vapor, and supports aluminum vapor deposition smoothly and firmly, so it is possible to improve heat resistance, high gloss, adhesion of aluminum vapor, In addition, a material is selected in consideration of dissociation from the label base paper by the alkaline liquid at the time of alkaline washing in the bottle label. For example, Japanese Utility Model Publication No. 5-8615 is known as a conventional technique.
[0010]
The pre-coating layer for vapor deposition, which has been used so far, for example, known as Japanese Utility Model Publication No. 5-8625, is a bottle washing tank in a washing step for washing and label removal of bottles collected from the market. In caustic soda solution (approx. 70 ° C, 4% NaOH (including sodium gluconate)), there are some that turn yellowish brown and are separated from the coated base paper, but relatively large film-like material It is quite difficult to completely separate the precoat and the pulp in a pulp recovery settling tank or the like that is mixed with the pulp of the coated base paper and provided in the washing bottle process.
[0011]
In addition, as disclosed in JP-A-8-127888, it is possible to recycle the label waste paper generated in a washing bottle of a label such as beer as a papermaking raw material.
1) The pre-coating agent adheres, and the gloss of the dryer surface of the paper machine is lowered, and the glossiness of the paper is lowered.
2) The pre-coating agent adheres to paper making tools (wire, felt, canvas) and the paper is perforated, or sticky foreign matter adheres to the base paper for labeling. It is considered difficult.
A paper manufacturing process has also been proposed that has been devised to solve such problems, but in the label base paper regenerated in this process, yellowish-brown foreign matters such as spotted precoat agents can be seen visually. When the label waste paper is reused, the yellowish brown precoat and the pulp content are a major obstacle.
[0012]
[Problems to be solved by the invention]
In label paper and packaging paper, especially bottle labels such as beer bottles, labels provided with an aluminum vapor deposition layer are often used in order to provide the functional structure as described above.
[0013]
The aluminum vapor deposition layer used for such a label has an excellent metallic luster despite being an extremely thin metal film (500 mm; 0.135 g / m ² ) of about 400 to 500 mm, and an aluminum foil (aluminum foil). Compared with stainless steel foil or the like, it has the same appearance, and depending on the deposition conditions, gloss and the like have a better appearance than the foil.
[0014]
The products that have been subjected to aluminum deposition in this way are indistinguishable from products using other metal foils such as aluminum foil and stainless steel foil.
[0015]
Here, when considering environmental issues, the aluminum vapor deposition layer consumes very little material, and compared to products using aluminum foil, there are no problems such as aluminum residue on paper in recycling, etc. Aluminum vapor deposition labels attached to glass bottles are extremely low in the amount of aluminum vapor deposition and excellent recyclability in recycling glass bottles manufactured through glass culleting, melting, etc., and are widely used as labels and packaging materials for many products. Yes.
[0016]
However, such an aluminum vapor deposition label is indistinguishable from metal foil by its appearance only at the stage of product distribution in the consumer market or general consumers, or at the stage of product disposal or collection, and is therefore discarded. It has been pointed out that some products are separated as products using metal materials and may be confused by disposal.
[0017]
When considering these environmental issues as a top priority, there is a movement to refrain from adopting aluminum deposition on labels and wrapping paper in situations where it is difficult for non-experts to discriminate between aluminum deposition products and metal foil products. Come. Under these circumstances, when removing the aluminum vapor deposition layer from many aluminum vapor deposition labels and wrapping paper, the concealment and water resistance that aluminum vapor deposition provided for the label base paper and wrapping paper itself used were provided. It is necessary to add this function.
[0018]
The present invention relates to a concealable paper used for various labels and wrapping paper including bottle labels such as beer bottles, and is a concealable paper having a structure excluding an aluminum deposited layer, having water resistance and preventing see-through. It is an object of the present invention to provide a concealable paper having improved concealability, a label using the paper as a label base material, and a wrapping paper using the paper.
[0019]
[Means for Solving the Problems]
In the invention according to claim 1 of the present invention, an additive clay coat layer to which aluminum fine particles are added and a white clay coat layer are provided in this order on one side of a base paper base material, and the additive clay coat layer is provided with the additive clay coat layer. It is a concealable paper characterized by adding 1 to 15% by weight of aluminum fine particles to 100% by weight .
[0020]
Then invention of claim 2 of the present invention, a white clay coating layer provided on one surface of the base paper substrate, the added clay coat layer obtained by adding aluminum fine particles provided on the other side of the base paper substrate, said additive The concealable paper is characterized in that the clay coat layer comprises 1 to 15% by weight of aluminum fine particles added to 100% by weight of the added clay coat layer .
[0021]
Next, in the invention according to claim 3 of the present invention, an additive clay coat layer to which aluminum fine particles are added and a white clay coat layer are provided in this order on one side of the base paper base, and a white clay is provided on the other side of the base paper base. A concealing paper provided with a coat layer , wherein the added clay coat layer comprises 1 to 15% by weight of aluminum fine particles added to 100% by weight of the added clay coat layer .
[0022]
Next, in the invention according to claim 4 of the present invention, an added clay coat layer, a white clay coat layer, in which a white clay coat layer is provided on one side of a base paper base and aluminum fine particles are added to the other side of the base paper base. Are provided in this order , and the additive clay coat layer is a concealable paper in which 1 to 15% by weight of aluminum fine particles is added to 100% by weight of the additive clay coat layer .
[0029]
Next, the invention according to claim 5 of the present invention is the concealing paper according to any one of claims 1 to 4 , wherein the base area weight of the base paper substrate is 20 to 120 g / m ² , This is a concealable paper in which the total unit area weight of the added clay coat layer and the white clay coat layer is 10 to 30 g / m ² .
[0030]
Next, in the invention according to claim 6 of the present invention , a printing layer is provided on the white clay coat layer on one side or both sides of the concealable paper according to any one of claims 1 to 5. It is a concealment label characterized by.
[0031]
Next, in the invention according to claim 7 of the present invention , a printing layer is provided on the white clay coat layer on one side or both sides of the concealable paper according to any one of claims 1 to 5. This is a concealing wrapping paper characterized by
[0032]
[Action]
Each concealing property sheet of the present invention, the net blank like 20 to 120 g / m ² base paper, provided the clay coat layer of 10 to 30 g / m ^2, art paper and coat the total weight was 30 to 150 g / m ² It is a coated paper such as paper, and the clay coat layer has a multilayer structure of at least two or more layers, and at least one of the layers contains 1 to 15 aluminum fine particles or carbon black for preventing see-through and improving concealment. Since the added clay coat layer made of kaolin, titanium oxide, etc. added by weight% is used, the hiding property is excellent, and this added clay coat layer is a clay coat layer having whiteness made of kaolin, titanium oxide, etc. Therefore, when this layer is used as a printing surface of paper, the whiteness and smoothness are excellent and the printability is sufficient.
[0033]
Further, the concealable label and the concealable wrapping paper of the present invention are manufactured using the concealable paper as a label base material and a packaging base material, and for adhesion or sealing of the concealable label to a container. It is possible to conceal the adhesive marks and glue marks by applying the adhesive and pasting the label base material by gluing. In addition, since the color of the container, the color of the contents, etc. can be concealed, even when the label or wrapping paper is used as it is or after printing, the concealment has an excellent appearance without impairing the whiteness of the printing paper. It can be used as a sex label or a concealing wrapping paper.
[0034]
DETAILED DESCRIPTION OF THE INVENTION
1 to 4 are cross-sectional views showing an example of a concealing paper, concealing label or concealing wrapping paper according to the present invention, and an aluminum-added clay to which aluminum fine particles are added at least on one side of a base paper substrate 10. A coating layer 11 is provided.
[0035]
First, the concealable paper or concealable label or concealable wrapping paper of the present invention shown in FIG. 1 includes an aluminum-added clay coat layer 11 to which aluminum fine particles are added on one side of a base paper base 10 (paper base). The white clay coat layer 12 is provided in this order.
Moreover, the concealable paper or concealable label or concealable wrapping paper of the present invention shown in FIG. 2 has an aluminum-added clay coat layer 11 to which aluminum fine particles are added on one side of a base paper base 10 (paper base). And a white clay coat layer 12 is provided on the other side of the base paper substrate 10.
Moreover, the concealable paper or concealable label or concealable wrapping paper of the present invention shown in FIG. 3 includes an aluminum-added clay coat layer 11 in which aluminum fine particles are added on one side of a base paper base material 10 (paper base material), The white clay coat layer 12 is provided in this order, and the white clay coat layer 12 is provided on the other side of the base paper substrate 10.
Further, the concealable paper, concealable label or concealable wrapping paper of the present invention shown in FIG. 4 is provided with a white clay coat layer 12 on one side of a base paper base material 10 (paper base material). On the other surface, an aluminum-added clay coat layer 11 and a white clay coat layer 12 to which aluminum fine particles are added are provided in this order.
[0038]
Here, when the base paper base material 10 is used as a bottle label, it is necessary that the elongation in water when immersed in water is 2.5% or less, particularly 1.5% or less. When an elongation base paper substrate is used, if water droplets or the like adhere, cracks or the like occur in the printed layer and the overcoat layer, and the appearance deteriorates.
[0039]
The base paper 10 used is a base 10 having a unit area weight of about ²⁰ to 120 g / m ² .
[0040]
The aluminum-added clay coat layer 11 provided on one side of the base paper substrate 10 is an aluminum-added clay coat agent in which 1 to 15 wt% of aluminum fine particles are added to a coat layer forming coat agent (100 wt%). it is, 1 to 40 g / m ² the coating agent on the base paper substrate 10 (solids), preferably not formed by applying formed in a range of 10 to 40 g / m ² (solid content).
[0042]
Further, the total unit area weight of the added clay coat layer 11 and the white clay coat layer 12 provided on one side of the base paper base material 10 is suitably about 10 to 30 g / m ^{2 in} order to provide good concealment. It is.
[0043]
The white clay coat layer 12 is made of, for example, a white clay coat agent mainly composed of kaolin (or white mineral pigment such as calcium carbonate, titanium oxide, clay) and mixed with an adhesive such as latex or starch. The coating is formed on the base paper substrate 10 or the added clay coat layer 11 with a coating amount in the range of 1 to 40 g / m ² (solid content), preferably 1 to 6 g / m ² (solid content). Is. This white clay coating agent is a common coating agent (white, such as kaolin, titanium oxide, calcium carbonate, white clay) coated on one or both sides of the base paper in the production of coated paper such as known coated paper or art paper. It is possible to use a paint or synthetic resin liquid in which a mineral pigment and an adhesive are mixed.
[0044]
As described above, the aluminum-added clay coating layer 11 uses an aluminum-added clay coating agent in which aluminum fine particles are blended in the white clay coating agent. The aluminum fine particles in the aluminum-added clay coating agent are in the range of 1 to 15% by weight, preferably 6 to 10% by weight. If the blending amount is less than 1% by weight, the concealability is insufficient, and if it exceeds 15% by weight, a film cannot be formed. Therefore, it is preferable to blend aluminum fine particles in the above range.
[0045]
On the white clay coat layer 12 of the concealable paper, the concealable label or the concealable wrapping paper of the present invention, an appropriate printing layer 13 is provided on a part or the whole of the white clay coat layer 12 as necessary.
[0046]
The printing layer 13 uses a printing ink in which a nitrocellulose resin, a polyamide resin, a rubber resin, or a mixed resin thereof is used as a vehicle, and a printed display such as a pattern, a pattern, a color, or a character is used as a label or wrapping paper. Applied.
[0047]
As described above, the structure of the concealable paper, concealable label, and concealable wrapping paper not provided with the aluminum vapor deposition layer has a good concealing property, and the paper, label, and wrapping paper itself are particularly The effect is that there is no discoloration due to light irradiation.
[0048]
【Example】
Specific examples of the present invention will be described below.
[0049]
<Example 1>
On one side of a base paper substrate 10 (trade name Comorant; manufactured by Fuji Processing Co., Ltd .; elongation in water 1.2%), kaolin (white) is the main component, and aluminum fine particles 10% by weight and an adhesive ( An aluminum-added clay coating agent blended with latex or / and starch) was applied at 3 g / m ² (solid content) and dried to form an aluminum-added clay coat layer 11.
[0050]
On this aluminum-added clay coat layer 11, a white clay coat agent containing kaolin (white) as a main component and an adhesive (latex or / and starch) is blended by 3 g / m ² (solid) by gravure coating. And the white clay coat layer 12 was formed to prepare the light-shielding paper of the present invention (FIG. 1).
[0051]
Further, on the white clay coat layer 12 of the light-shielding paper (FIG. 1), a label display brand and a pattern are printed using a printing ink in which polyamide resin is used as a vehicle and maleic acid is added 6%. The printing layer 13 was provided and the concealment label (FIG. 1) of this invention was created.
[0052]
Further, a resin solution in which an alkyd resin is mixed with a nitrocellulose resin is applied to the entire surface of the white clay coat layer 12 of the light-shielding paper from the label printing layer 13 and dried to form an overcoat layer (protective layer). An inventive concealment label (FIG. 1) was prepared.
[0053]
When this concealable label was pasted on a glass bottle (beer bottle) using casein glue (or starch glue), good concealability was obtained, the color of the printed layer was reproduced as it was, and the appearance was excellent. It was.
[0054]
Next, when the bottle was washed with a 4% caustic soda solution at 70 ° C., the label could be peeled off within 2 minutes, and the bottle could be washed without leaving a film of the aluminum-added clay coat layer 11.
[0055]
【The invention's effect】
The present invention relates to a water-resistant hiding paper having a structure without a metal foil or a metal vapor-deposited layer, a hiding label and a hiding wrapping paper using the same, and a white clay coat layer and a base paper base for providing a printing layer. Concealing property is required by providing a concealing added clay coat layer in which a certain amount of concealing aluminum fine particles are blended and added to the clay coating agent between the surface of the material or the back side of the base paper substrate. Good concealability can be imparted to paper, labels, and wrapping paper.
[0056]
Moreover, since the concealable label of the present invention can sufficiently conceal the surface of the sticking portion of the bottle when attached to the surface of a bottle such as a beer bottle, the white clay coat layer on the surface of the label body or the surface of the coat layer. The color tone of the printed print layer, particularly the white color print layer or other colored print layers, can be reproduced while maintaining the same color tone and appearance without any problem in appearance.
[0057]
Further, among the concealable labels of the present invention, a label using an aluminum-added clay coating agent containing a certain amount of aluminum fine particles can be peeled off with an alkaline solution at the time of washing the label and washed with an alkaline solution at the time of washing the bottle. In this case, the aluminum-added clay coat layer can be peeled off in a short time without remaining in the state of a film, and can be easily regenerated without any trouble in regenerating the label base paper substrate.
[0058]
Further, the concealing paper using the aluminum-added clay coating agent containing a certain amount of the aluminum fine particles of the present invention and the concealing label and concealing wrapping paper using the same are different from those having a metal foil or a metal vapor-deposited layer. Because metallic luster does not appear, paper products are not visually distinguished as products using metal or metal materials at the stage of product distribution in the consumer market or general consumers, or at the recycling stage such as product disposal or collection. Therefore, there is an effect that separation processing, disposal, and recovery processing can be easily performed as a paper product without being confused by the disposal processing.
[Brief description of the drawings]
FIG. 1 is a side showing an example of a laminated structure of a concealing paper in which a concealing layer is formed by an aluminum fine particle-added clay coat layer of the present invention, a concealing label using the paper, or a concealing wrapping paper using the paper. Sectional drawing.
FIG. 2 is a side cross-sectional view showing another example of a laminated structure in which a concealing layer made of an aluminum fine particle-added clay coat layer of the present invention is laminated.
FIG. 3 is a side cross-sectional view showing another example of a laminated structure in which a concealing layer made of an aluminum fine particle-added clay coat layer of the present invention is laminated.
FIG. 4 is a side cross-sectional view showing another example of a laminated structure in which a concealing layer made of an aluminum fine particle-added clay coat layer of the present invention is laminated.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Base paper base material 11 ... Aluminum fine particle addition clay coating layer 12 ... White clay coating layer 13 ... Printing layer

Claims (7)

An additive clay coat layer in which fine aluminum particles are added and a white clay coat layer are provided in this order on one side of the base paper base , and the additive clay coat layer is 1 to 15% by weight with respect to 100% by weight of the additive added clay coat layer. Concealment paper characterized by the addition of aluminum fine particles . A white clay coat layer is provided on one side of the base paper base, an additive clay coat layer to which aluminum fine particles are added is provided on the other side of the base paper base , and the added clay coat layer is 100% by weight of the added clay coat layer. Concealment paper characterized in that 1 to 15% by weight of aluminum fine particles are added . Added clay coat layer obtained by adding aluminum fine particles on one side of the base paper substrate, provided a white clay-coated layer in this order, a white clay coating layer provided on the other side of the base paper substrate, the added clay coat layer, the A concealable paper comprising 1 to 15% by weight of aluminum fine particles added to 100% by weight of the added clay coat layer . The white clay coat layer provided on one surface of the base paper substrate, other additives clay coat layer obtained by adding aluminum fine particles on one side of the base paper substrate, provided a white clay-coated layer in this order, said adding the clay coat layer, the A concealable paper comprising 1 to 15% by weight of aluminum fine particles added to 100% by weight of the added clay coat layer . Weight per unit area 20 to 120 g / m ² of the base paper substrate, any one of the added clay coat layer and claims 1 to 4 total area weight of white clay coat layer is 10 to 30 g / m ² Concealment paper described in the section. A concealing label comprising a printing layer provided on a white clay coat layer on one side or both sides of the concealing paper according to claim 1 . A concealing wrapping paper, wherein a printing layer is provided on a white clay coat layer on one or both sides of the concealing paper according to any one of claims 1 to 5 .

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