JP2014217554A - Coaster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply provide a coaster capable of giving unconventional design while keeping a function as a coaster.SOLUTION: A coaster 1 is constituted by a multi-layer sheet where a paper-made upper sheet 4 having an opening 3 and a paper-made lower sheet 5 without having an opening are pasted together. A portion to be exposed to an outside through the opening 3 within the upper surface of the lower sheet 5 does not have an adhesive layer. Design printed on the upper surface of the lower sheet 5 can be visually recognized through the opening 3 of the upper sheet 4.

Description

  The present invention relates to a paper coaster.

Conventionally, coasters using various materials and having various functions have been developed.
Patent Document 1 discloses a multi-layer coaster that can display the hidden display described on the back sheet by removing a part of the front sheet. This multi-layer coaster requires the application of a special release varnish in order to be able to peel off the release sheet.

  Patent Document 2 discloses a coaster made of a multilayer paper sheet. However, this coaster aims only at improving the water absorption performance. Patent Document 3 discloses a coaster that uses water-color-changing ink to develop characters and figures when wet. However, this coaster requires a special material such as water discolorable ink or a material having fine pores.

JP 2009-56122 A JP 2006-144175 A Registered Utility Model No. 3033832

  The coaster has a function of absorbing water and beverages dripping from a glass, a mug, etc., and suppressing wetting on the table. It can be used not only for exhibiting such functions, but also for purposes such as production and amenity to change the atmosphere of eating and drinking by making it a stylish coaster with various shapes, patterns and colors Is.

  In order to respond to such a demand, the present invention simply provides a coaster that can impart an unprecedented design property while maintaining the function of a coaster while using relatively familiar paper as a material. The challenge is to do.

  Therefore, the present inventor has focused on paper as a material that is thin, lightweight, and has excellent handleability, and has been studying to solve the above problems by utilizing the characteristics of paper. As a result, it was a multilayer sheet composed of an upper sheet and a lower sheet, and found that the above problems could be solved by making use of the characteristics of the paper material by providing an opening in the upper sheet, and reached the present invention It is.

That is, the present invention has the following configuration.
1. A multi-layer sheet in which a paper upper sheet having an opening and a paper lower sheet not having an opening are bonded to each other, and exposed to the outside through the opening on the upper surface of the lower sheet. The coaster is characterized in that the portion does not have an adhesive layer, and the design printed on the upper surface of the lower sheet can be seen through the opening of the upper sheet.

2. 2. The coaster according to 1 above, wherein the design is any one or a combination of two or more selected from characters, figures, patterns, and colors.

3. 3. The coaster according to 1 or 2, wherein the upper sheet and the lower sheet have a basis weight of 30 to 1000 g / m ² and a thickness of 40 to 2000 μm.

4). 4. The coaster according to any one of 1 to 3, wherein the upper sheet and the lower sheet are coated with a coating liquid obtained by adding a surfactant to a paper strength enhancer.

  A coaster capable of imparting unprecedented designability while maintaining the function as a coaster can be provided simply.

(A) is a perspective view which shows the structure of the coaster which concerns on embodiment of this invention. (B) is sectional drawing in the AA position of (a). (A), (b), (c) is a front view of the specific example of the design usage of the coaster which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail. In addition, embodiment of this invention is not necessarily restricted to embodiment shown below.

  The present invention relates to a coaster that is laid on a table and used by placing tableware such as glasses and mugs on the table.

The configuration of the coaster of the present embodiment will be described with reference to FIG.
The coaster 1 of the present embodiment is composed of a multilayer sheet obtained by bonding a paper upper sheet 4 having an opening and a paper lower sheet 5 having no opening. The upper sheet 4 includes a non-opening 2 and an opening 3 (FIG. 1). FIG.1 (b) is sectional drawing in the AA position of Fig.1 (a). 1A shows the upper surface of the lower sheet 5 exposed to the outside through the opening 3 of the upper sheet 4.

  The upper sheet 4 and the lower sheet 5 constituting the coaster 1 of the present embodiment are both made of paper, and the upper sheet 4 and the lower sheet 5 are bonded to each other with an adhesive or the like. Therefore, the coaster 1 of the present embodiment is composed of a multilayer sheet having at least two layers. By being a multilayer sheet, the form is stable, strength can be imparted, and handling properties are improved.

  A known method can be used as a method of bonding the upper sheet 4 and the lower sheet 5 of the coaster 1 of the present embodiment. For example, a known adhesive for paper, a pressure-sensitive adhesive, a crimping method, and the like can be used. As the adhesive, a liquid adhesive, a hot melt adhesive, or the like can be used. In addition, the adhesive is preferably one that has a small decrease in adhesive strength against water.

  The upper sheet 4 is bonded to the upper side of the lower sheet 5. Each of the upper sheet 4 and the lower sheet 5 is not limited to one paper material, and two or more paper materials can be laminated and used as each sheet.

  The upper sheet 4 has an opening 3, and the bottom of a tableware such as a glass or a mug can be accommodated inside the opening 3. At this time, the upper sheet 4 is placed on the portion of the upper surface of the lower sheet 5 that is exposed to the outside through the opening 3, and the upper sheet 4 is laminated according to the thickness of the upper sheet 4 stacked on the lower sheet 5. The water and beverage that drip from the tableware such as glass and mug and accumulate in the opening 3 will function to be dammed so as not to leak out of the opening 3.

  Moreover, the upper sheet | seat 4 has the opening part 3, and can also be designed so that the bottom face of tableware, such as a glass and a mug, may not fit inside the opening part 3. FIG. At this time, water and beverages dripping from the tableware are collected not only in the opening 3 of the upper sheet 4 but also in the portion 2 that is not the opening of the upper sheet 4. When the shape of the opening 3 is determined with emphasis on the design of the coaster 1, such usage will occur.

  There are no particular restrictions on the shape and number of the openings 3 of the upper sheet 4. From the viewpoint of allowing the bottom of a tableware such as a glass or a mug to be accommodated, the shape can be a circle or a rectangle. In addition, from the viewpoint of emphasizing design, appropriately design openings of various shapes from the relationship between various characters, figures, patterns, and colors applied to the upper surface of the upper sheet 4 and the lower sheet 5 by printing, Can be adopted. The number of openings 3 is not limited to one. Two or more openings 3 may be provided (see FIG. 2C).

As specific examples of how to use the design in this embodiment, examples thereof are shown in FIGS. 2 (a), (b), and (c). Combined with the design of the upper sheet 4 and the design of the lower sheet 5, the shape of the opening 3 is also determined from the design surface.
Note that in FIG. 2, the portion with dots indicates the upper surface of the lower sheet 5 exposed to the outside through the opening 3 of the upper sheet 4.

  There is no particular limitation on the method of providing the opening 3 in the upper sheet 4. There are a method in which the upper sheet 4 in which the opening 3 is punched is bonded to the lower sheet 5, and a method in which the upper sheet 4 is punched in the shape of the opening 3 after forming a multilayer sheet.

The following method can be considered as a specific example of the use method of the coaster 1.
(1) It can be used in such a manner that it is packaged and sold in a state where the opening 3 is formed, and the packaging is opened at the time of use and used as it is.
(2) After the upper sheet 4 is punched in the shape of the opening 3, the punched portion is not removed and is held as it is. For the first time, it is possible to take a method of use in which the user or the like has removed the part punched out to form the opening 3 and then used. At this time, by removing the punched portion, some visual effect can be generated before and after the removal.
(3) After punching out the upper sheet 4 except for a part in the shape of the opening 3, the upper sheet 4 is held as it is without removing the punched portion. For the first time when using it, the user can open and close the part punched out to form the opening 3 and then use it. At this time, some visual effect can be generated by opening and closing the punched portion.
(4) A removable cover (not shown) is installed in the opening 3. For the first time in use, the user can remove the lid to form the opening 3 and then use it. At this time, the removal of the lid can cause some visual effect before and after the removal.

  As the type of paper constituting the upper sheet 4, among various papers in consideration of shape stability, strength, ease of forming openings, durability against water and beverages, water absorption, etc. You can select and use.

  As the paper constituting the upper sheet 4, for example, the following is preferably used. That is, as described in JP-A-6-306793, a coating liquid in which a paper strength enhancer and a surfactant are blended is applied to at least one side of paper made by adding a sizing agent to pulp slurry, Examples thereof include dried paper and multilayer papers having two or more layers having a specific water absorption as described in JP-A-2006-16730 and JP-A-2006-144175.

The basis weight and thickness of the paper constituting the upper sheet 4 are appropriately selected in consideration of shape stability, strength, ease of formation of the opening 3, durability to water and beverages, water absorption, and the like. be able to. From these viewpoints, the basis weight is preferably 30 to 1000 g / m ² . The thickness is preferably 40 to 2000 μm.

  The type of paper constituting the lower sheet 5 is selected from various papers in consideration of shape stability, strength at the time of water absorption, durability against water and beverages, water absorption, etc. Can do.

  As the paper constituting the lower sheet 5, for example, the following is preferably used. That is, as described in JP-A-6-306793, a coating liquid in which a paper strength enhancer and a surfactant are blended is applied to at least one side of paper made by adding a sizing agent to pulp slurry, Examples thereof include dried paper and multilayer papers having two or more layers having a specific water absorption as described in JP-A-2006-16730 and JP-A-2006-144175.

The basis weight and thickness of the paper constituting the lower sheet 5 can be appropriately selected in consideration of the stability of the shape, the strength during water absorption, the durability against water and beverages, the water absorption, and the like. From these viewpoints, the basis weight is preferably 30 to 1000 g / m ² . The thickness is preferably 40 to 2000 μm.

  The upper sheet 4 and the lower sheet 5 are papers that are particularly excellent in water absorption in order to prevent water and beverages dripping from a glass, mug, etc. from falling on the table and getting wet on the table as much as possible. It is preferable to use a raw material.

Examples of the paper excellent in water absorption include the following.
That is, as described in JP-A-6-306793, in order to increase the paper surface picking strength required during offset printing, the penetration of a coating agent such as a paper strength enhancer into the paper layer is suppressed. Therefore, paper is made by adding an internal sizing agent to the pulp slurry by a conventional method. When paper strength enhancers such as polyvinyl alcohol, starch, modified starch, and acrylic resin emulsion are applied to this paper with a size press, at the same time, an interface that has a wetting and penetrating effect on water in the coating solution of the paper strength enhancer. When the activator was added and applied, excessive internal penetration of the size press coating solution was suppressed by the sizing agent internally added to the paper material, and the surface strength was increased, which was added to the size press coating agent. Due to the action of a wet and permeable surfactant, the effect of the sizing agent is reduced and water absorption becomes easy. When the coating agent is applied to both sides of the paper, the surface strength of both the front and back sides of the paper is high, and a paper that is easily absorbable in all layers can be obtained. Further, if the above coating agent is applied to one side of paper, the surface strength is high only on one side, and a paper with easy water absorption on one side and poor water absorption on one side can be obtained.

The most commonly used internal sizing agent is a rosin-based sizing agent. Maleic anhydride or fumaric acid is thermally added to the rosin to form a maleated rosin or fumarated rosin, and a reinforced rosin made into a solution by adding an alkali. There are sizing agents and emulsion sizing agents dispersed in water using an emulsifier. The rosin sizing agent is used in combination with aluminum sulfate as fixability to the pulp and as a hydrophobizing agent. The synthetic sizing agent is a neutral sizing agent obtained by converting C ₃ and C ₄ fractions obtained by pyrolyzing the raw material naphtha into a ₃ to 4 oligomer and then reacting with maleic anhydride to saponify the alkali. They can be classified into alkyl ketene dimers, alkenyl succinic anhydrides, etc., and any of these can be used in the present invention.

  The surfactant that is easily absorbed in water by using a paper strength enhancer together with the paper containing a sizing agent preferably has water wettability and permeability, such as polyoxyethylene nonyl ether, polyoxyethylene lauryl ether, Anionic, nonionic, cationic and amphoteric surfactants such as sodium alkylnaphthalene sulfonate, fatty acid polyethylene glycol ester, sodium lauryl polyoxyethylene sulfate, and polyethylene glycol oxynonyl phenyl ether can be used in the present invention.

  As described above, the water penetration prevention ability of the paper expressed by the sizing agent added in the pulp slurry is added to the paper strength enhancer applied by the size press by the surfactant having a wetting and penetrating effect. In order to reduce this, it is important to control the balance of the type, combination, and amount of the sizing agent and surfactant used. If this balance is lost, the surface strength is maintained, but the size effect remains, and conversely, There is a possibility that troubles such as lack of surface strength capable of offset printing occur due to water absorption. In addition, the internal sizing agent to be used is that even if a surfactant-added coating solution is applied only to one side of the paper for the purpose of single-sided easy water absorption or single-sided water repellency, the entire layer may absorb water in some cases. The combination of surfactants in the size press coating liquid, the setting of the type and the amount added are particularly important. Usually, the sizing agent is 0.01 to 5 parts by mass with respect to 100 parts by mass of the pulp, and the surfactant is about 1 to 30 parts by mass with respect to 100 parts by mass of the paper strength enhancer. Moreover, the coating amount of the paper strength enhancer with respect to paper is about 0.01-1.0 mass%.

  The upper sheet 4 and the lower sheet 5 may use the same type of paper or different types of paper. When emphasizing printing, it is preferable to select a paper type having excellent surface printing characteristics. When the coaster 1 is used, it is desirable that the contraction and expansion behavior of the upper sheet 4 and the lower sheet 5 due to temperature and humidity be the same so that they are not curled or deformed during storage or use. In particular, it is preferable to use the same type of paper for the upper sheet 4 and the lower sheet 5 because curling can be effectively suppressed when the upper sheet 4 and the lower sheet 5 are bonded together.

  As described above, the coaster 1 according to the present embodiment is made of paper and can have various outer shapes. The front shape can be freely selected according to the purpose and application, such as a square shape, a circular shape, an elliptical shape, and a character shape. Similarly, the size of the coaster 1 can be freely selected according to the purpose and application.

Various characters, figures, patterns, and colors can be applied to the upper sheet 4 and the lower sheet 5 by printing or the like. It can be designed freely according to various purposes such as advertising / advertisement, provision of information, and amenity.
In particular, the upper sheet 4 and the lower sheet 5 have a step, and the opening 3 of the upper sheet 4 can be formed in various shapes. Along with printing, it is possible to design products with excellent design. It is also possible to create a three-dimensional visual effect. The printing method is not particularly limited. If ink that is colored or discolored by absorbing water is used for printing, a more unusual effect can be produced.

(Production method)
Next, the manufacturing method of the coaster 1 of this embodiment is demonstrated.
As a manufacturing method of the coaster 1, a typical manufacturing process is shown below. The first manufacturing method has the following steps.
(1) A design is printed on the upper sheet 4 and the lower sheet 5.
(2) A predetermined portion of the upper sheet 4 is punched with the outer shape of the opening 3, and the punched portion is removed to form the opening 3.
(3) An adhesive is applied to the back side of the upper sheet 4 from which the opening has been punched.
(4) The upper sheet 4 is placed on the lower sheet 5, and the two are bonded together.
(5) The laminated multilayer sheet is punched into a predetermined coaster shape.

The second manufacturing method has the following steps.
(1) A design is printed on the upper sheet 4 and the lower sheet 5.
(2) An adhesive is applied to the back side of the upper sheet 4 to a portion other than a portion to be punched later.
(3) The upper sheet 4 is placed on the lower sheet 5, and both are bonded together.
(4) About only the said upper sheet | seat 4 of the laminated | multilayer sheet bonded together, a predetermined location is pierced by the external shape of the opening part 3, the pierced site | part is removed, and the opening part 3 is formed.
(5) The multilayer sheet is punched into a predetermined coaster shape.
Here, in the step (2) of the second manufacturing method, it is necessary to apply the adhesive so that it is not applied to the region to be the opening 3.

  As a result of employing the above manufacturing method, an adhesive layer, a release agent layer, or the like does not exist in a portion of the upper surface of the lower sheet 5 that is exposed to the outside through the opening 3. Therefore, it does not occur that an adhesive or the like adheres to the bottom surface of the tableware or that the water absorption performance of the upper surface of the lower sheet 5 in the opening 3 is lowered.

As can be seen from the above description, the present embodiment can exhibit excellent effects as described below, depending on the embodiment.
(1) Since it has a structure in which paper is simply laminated, it is thin and lightweight, and is excellent in packaging, transportation, storage and handling.
(2) The paper itself utilizes the liquid absorption, retention, and diffusion capabilities inherently possessed by the paper itself, and can be manufactured in large quantities relatively easily.
(3) Various sizes of coasters can be easily designed and manufactured according to the purpose.
(4) The water absorption performance can be controlled relatively easily by changing the paper thickness, porosity, pulp type, additives, and the like.
(5) The opening portion of the upper sheet has a step, and has a function of blocking so that water and beverages do not leak outside the opening portion.
(6) Various characters, patterns and colors can be given to the upper sheet and lower sheet by printing, etc., and freely designed according to various purposes such as advertising / advertisement, information provision, amenity, etc. be able to. The opening of the upper sheet can be formed in various shapes, and a product with excellent design can be obtained by using the step.
(7) Since it is basically composed of paper, it can be easily disposed of by incineration or the like.

1 Coaster 2 Non-opening of upper sheet 3 Opening of upper sheet 4 Upper sheet 5 Lower sheet

Claims (4)

  A multi-layer sheet in which a paper upper sheet having an opening and a paper lower sheet not having an opening are bonded to each other, and exposed to the outside through the opening on the upper surface of the lower sheet. The coaster is characterized in that the portion does not have an adhesive layer, and the design printed on the upper surface of the lower sheet can be seen through the opening of the upper sheet.   The coaster according to claim 1, wherein the design is any one kind or a combination of two or more kinds selected from characters, figures, patterns, and colors. The coaster according to claim 1, wherein the upper sheet and the lower sheet have a basis weight of 30 to 1000 g / m ² and a thickness of 40 to 2000 μm.   The coaster according to any one of claims 1 to 3, wherein the upper sheet and the lower sheet are coated with a coating liquid obtained by adding a surfactant to a paper strength enhancer.

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