JP3720153B2 - Manufacturing method of label sticking container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a label sticking container in which a label with an identification mark that can be identified even by a blind person such as a blind person is integrally fused to a resin container.
[0002]
[Prior art]
Conventionally, ordinary containers have been printed with labels printed to indicate the type of contents in the container, the manufacturer, etc., and buyers and users can display the images and characters on these labels. Purchased or used after confirming visually.
However, for blind people, such as blind people, these labels cannot be checked with the eyes, so the shape of the container can be read by hand or the label can be read by people who can see. I couldn't buy or use it until I got it.
For this reason, the shape of the container body can be changed according to the type and grade of the contents, or the lid of the container can be easily purchased by the manufacturer. The shape etc. were changed and the mark of special rib-shaped protrusions etc. was made to the container main body. For example, in the invention described in Japanese Patent Laid-Open No. Sho 63-317462, Japanese Patent Laid-Open No. 1-267159, and Japanese Patent Laid-Open No. 2-13932, the container is provided with an uneven relief (engraving) shape or the like. It is described that it is read by hand touch.
[0003]
[Problems to be solved by the invention]
However, changing the shape of the container body in this way, or changing the shape of the container lid, etc., and attaching a special mark to the container body makes it possible to change the container type according to the type and grade of the contents in the container. The mold for molding had to be changed. As a result, the types of container molds increased, which had an effect on the cost of the product.
[0004]
[Means for Solving the Problems]
In light of the above problems, the present inventor changed the shape of the container body and lid, or as a result of earnest research whether the contents could be identified without attaching special marks to the container body, The present invention has been completed based on the knowledge that a label-attached container with little influence on cost can be obtained by molding a resin container using a label with an identification mark.
That is, in the method for producing a labeling container of the present invention, the embossed pattern of (i) wire numbers 40 to 200 / inch is formed on a part of the surface of a stretched microporous resin film having a porosity of 5 to 60%. (Ii) perforation, (iii) perforation, (iv) Braille , (v) printing with foamed ink , and a label on which a flat portion is left is provided . Is placed in the mold so as to be in contact with the mold wall, then in-mold molding is performed in the mold, and the label is integrally fused to the resin container.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
[I] Labeling container
(1) Container body
(a) Material In the method for producing a label adhering container of the present invention, as a material for a container main body used for in-mold molding in which label adhering and container molding are integrated in a mold, hollow molding is used. Well-known thermoplastic resins used when manufacturing various containers by molding methods such as injection molding, differential pressure molding (vacuum molding, pressure molding), press molding, foam molding, etc. can be used. It is preferable to use a thermoplastic resin having a temperature of 135 to 264 ° C.
Specific examples of such a thermoplastic resin include polypropylene, polyethylene having a density of 0.880 to 0.965 g / cm ³ , polystyrene, polyacrylonitrile, polyvinyl chloride, polyethylene terephthalate, polyamide, and polycarbonate. Among these thermoplastic resins, it is particularly preferable to use polypropylene or high-density polyethylene. Moreover, you may use as a laminated body and may blend and use 2 or more types.
[0006]
(b) Shape As the shape of the container, various shapes can be used.
[0007]
(2) Labels Labels used in the method for manufacturing a label adhering container of the present invention and fused and integrated with the container include in-mold molding fine labels with identification marks consisting of the following structures and materials. A label made of a stretched porous resin film is used.
[0008]
(a) Structure The label with the above identification mark is basically composed of a base material layer and an adhesive layer made of a heat-sealable resin laminated on the back side of the base material layer. It has a two-layer structure, or a three-layer structure in which a paper-like layer of a uniaxially stretched resin film containing inorganic fine powder is formed on the surface side, or a multilayer structure. .
[0009]
Such a label is in the form of a piece of paper before being attached to the container in the mold, but is integrated with the container after being attached.
[0010]
(b) Materials (component materials)
As a raw material used as a label in the method for producing a label adhering container of the present invention, a stretched microporous resin film having a porosity of 5 to 60%, preferably 10 to 45% is used.
[0011]
Examples of the material in the case of the label having the above structure are as follows.
[0012]
(1) Base material layer Materials used for the base material layer include polypropylene, high density polyethylene, medium density polyethylene, linear polyethylene, polyvinyl chloride, polyethylene terephthalate, polybutylene terephthalate and other polyesters, and melting points such as polyamide. A resin film containing 8 to 65% by weight of an inorganic fine powder in a thermoplastic resin at 127 to 264 ° C., or a film obtained by coating an inorganic filler-containing latex on the surface of the resin film, or the resin For example, a film obtained by evaporating aluminum, SiO ₂ or the like can be used. Such a base material layer may be a single layer or may be a film having a multilayer structure in which two or more layers are laminated.
In the case of such a resin film having a multilayer structure, it can be laminated by a coextrusion method or a lamination method.
[0013]
(2) Adhesive layer On the back side of the resin film of the base material layer (the side in contact with the resin container), a temperature of 20 ° C. or more lower than the melting point of the material resin (A) of the base material layer, preferably 78 to 145 A heat-sealable resin made of a thermoplastic resin having a melting point of ° C. alone or a mixture of two or more kinds (B, B ′) is used.
Here, the melting point of the thermoplastic resin is the peak temperature of the DSC curve when 3 to 10 mg of the sample resin is measured with a differential thermal scanning analyzer (DSC) at a heating rate of 5 ° C./min.
[0014]
Examples of such heat-sealable resin compositions include high density polyethylene, medium density and low density polyethylene, linear linear polyethylene, ethylene / vinyl acetate copolymer, ethylene / acrylic acid copolymer, and ethylene / acrylic acid alkyl ester. Copolymers, ethylene / methacrylic acid alkyl ester copolymers (alkyl group having 1 to 8 carbon atoms), ethylene / methacrylic acid copolymer metal salts (Zn, Al, Li, K, Na), etc. Resin is used.
In particular, when the resin (C) of the parison is polypropylene or high-density polyethylene, linear linear low-density polyethylene (density: 0.88 to 0.94 g / cm ³ , melt index: 0.05 to 30 g / 10 minutes) 10 to 10 Good mixture of 55% by weight and one or more resins selected from low density polyethylene, ethylene / methacrylic acid copolymer, ethylene / acrylic acid copolymer, ethylene / vinyl acetate copolymer, 90 to 45% by weight It is.
The heat-sealable resin layer may be a transparent film and may be unstretched or stretched. Preferably, even if it is stretched, it does not have crystal orientation.
[0015]
(c) Stretching The laminated film obtained by laminating the heat sealing resin on the base material layer is stretched in at least one direction. The stretching is usually 3 to 12 times, preferably 4 to 10 times, particularly preferably 3.5 to 10 times, preferably 4 to 7 times in the longitudinal direction, and 3.5 to 12 times, preferably 5 in the transverse direction. Stretched 10 to 10 times.
[0016]
(d) Thickness The total thickness of the thickness label is generally 30 μm to 300 μm, preferably 45 to 200 μm. The thickness of the adhesive layer of the label having the heat-sealable resin is generally 1 to 30 μm, preferably 2 to 20 μm.
[0017]
(e) Other treatments If necessary, the laminated film (synthetic paper) after stretching is subjected to corona discharge machining, flame treatment, plasma treatment, etc. to improve surface printability and adhesion. be able to.
Further, printing is usually performed on the surface side of the base material layer, for example, a paper-like layer. Such printing includes gravure printing, offset printing, flexographic printing, screen printing, and the like. By this, product names, manufacturers, sales company names, characters, barcodes, usage methods, and the like can be printed.
[0018]
(f) Identification mark It is important that an identification mark is provided on the label used in the method for producing a labeled container of the present invention.
The identification marks may include embossed pattern lines numbered 40 to 200 (number of lines per inch), perforation of 1～10Mmfai, perforations, Braille, printing with foaming inks, and the like. As these identification marks, at least one kind of identification mark can be used alone or in combination.
[0019]
(i) Embossed pattern with wire numbers of 40 to 200 lines / inch The embossed pattern with line numbers of 40 to 200 lines / inch is linear, trapezoidal, lattice, or the like.
(ii) Perforation As the perforation, for example, a hole having a diameter of about 1 to 10 mm, preferably about 2 to 6 mm is formed. The shape of the hole may be various shapes such as a circle, a square, a triangle, and a star shape.
(iii) Perforations Perforations having a width of 0.3 to 1 mm, preferably about 0.3 to 0.6 mm are continuously formed at intervals of 1 to 5 mm, preferably about 2 to 3 mm. You can wear it.
(iv) Braille Braille is provided with an emboss having a size of about 3 × 3 to 12 × 12 mm square, preferably about 5 × 5 to 10 × 10 mm square at intervals of about 2 to 5 mm, preferably about 3 to 4 mm.
[0020]
(g) Stamping process Container labels with the above-mentioned printing / identification marks are separated into labels having the required shape and dimensions by punching process. This label may be a partial label attached to a part of the surface of the container, but can usually be formed as a blank surrounding the side surface of the cup-shaped container.
[0021]
[II] In-mold molding
(1) Placement In order to integrate the label provided with the identification mark with the resin container, in-mold molding is performed after the identification mark is placed in contact with the wall surface in the mold for in-mold molding. The
[0022]
(2) Examples of the in-mold molding for fusing the molded label so as to be integrated with the resin container include vacuum molding, pressure molding, hollow molding, matched die molding, and injection molding.
(a) After placing the vacuum forming or pressure forming identification mark so as to be in contact with the wall surface in the in-mold forming mold, the molten resin sheet is introduced into the mold to reduce the pressure, or pressurize the compressed gas. It implements by the method of the well-known vacuum forming and / or pressure forming which are used.
[0023]
(b) After the hollow molding identification mark is arranged so as to be in contact with the wall surface in the in-mold molding die, the molten parison is guided into the die, and a known hollow molding method is performed.
Manufacturing of hollow container Specifically, for example, after inserting the label identification surface into the mold surface and the adhesive layer side toward the inside of the mold inner wall surface in advance, extrusion into the mold is performed. A thermoplastic resin parison such as polypropylene resin or high-density polyethylene resin melted and kneaded by a machine is dropped at a temperature of 170 ° C. to 250 ° C., one end of which is sealed by clamping, and then the inside of the parison is filled with 0.00. 5~10kg / cm ² G, preferably it inflates the parison by introducing a compressed gas 2~5kg / cm ² G.
Thus, the outer surface of the parison is pressed against the inner wall of the mold to mold the parison into a shape along the shape of the mold, and the parison melted in the adhesive layer of the label inserted in the inner wall of the mold After the resin of the adhesive layer of the label is melted and the parison and the adhesive layer of the label are fused, it is cooled, the mold is opened, and the hollow molded container with the label is taken out from the mold. To manufacture.
[0024]
(c) After the injection molding identification mark is placed in contact with the wall surface in the mold for in-mold molding, the label is integrally fused to the resin container by a normal injection molding method in which the molten resin is injection molded. be able to.
[0025]
[III] Labeled containers The labeled containers manufactured as described above are good ones with less blistering, short molding cycles and low molding costs, so shampoo containers, edible oil bottles, It can be used as a general-purpose container such as a motor oil container, a toilet sterilization solvent container, and other various containers for daily use.
[0026]
【Example】
The present invention will be described more specifically by the following experimental examples.
Examples 1-3
(1) Manufacture of labels for in-mold Toyo Morton (product name: 31% porosity) on one side of synthetic paper "YUPO FPG-80" (trade name: porosity 31%) made of Oji Oil Chemical Co., Ltd. microporous polypropylene stretched film Co., Ltd. heat-sensitive heat sealant “Adcoat X33P5” [toluene solution of ethylene / vinyl acetate copolymer (crystallization temperature 58 ° C. measured by DSC)] was applied at a coating amount of 4 g / m ² and dried. Furthermore, contrary to the heat seal agent, (b) for hair shampoo ( Reference Example ), (b) for hair rinse (Example 1 ), and (c) for body shampoo (Example 2 ), respectively. Printed.
Next, (i) the hair shampoo label was embossed with 60 lines / inch of wire number and 6 perforations with a diameter of 5 mm were drilled. (B) the hair rinse label was embossed on both sides with line numbers of 100 lines / inch. And 5 holes with a diameter of 5 mm, and (c) embossing with a wire number of 120 lines / inch on the 1/4 side of the body shampoo label and 4 holes with a diameter of 5 mm and 5 holes with a diameter of 3 mm. Open (b) hair shampoo ( reference example ), (b) hair rinse (example 1 ), and (c) body shampoo (example 2 ) each for an in-mold of 10 cm × 10 cm. Punched as labels, (i) labels for shampoos for hair, (b) labels for hair rinses, and (c) labels for body shampoos were produced.
[0027]
(2) Hollow molding Apply these in-mold labels to the mold so that the surface (surface layer) opposite to the surface (adhesive layer) coated with the heat sealant of the label is in contact with the wall surface of the mold. I put it on.
Next, “high density polyethylene BZ-50” manufactured by Mitsubishi Chemical Corporation was extruded into this mold, and a parison was extruded at a resin temperature of 200 ° C. using “V-50 type hollow molding machine” manufactured by Plako Co., Ltd. .
Then, the parison is sandwiched between molds cooled with 20 ° C. cooling water at an amount of water of 30 liters / minute, and then compressed air with a pressure of 5 kg / cm ² is supplied into the parison and the parison is placed on the inner wall of the mold. After forming the mold, the mold is opened and the body diameter is 60 mm, the height is 200 mm, and the wall thickness is 1 mm. (A) A hollow container for hair shampoo ( reference example ), (b) A hollow container for hair rinse ( Example 1 ) and (c) A hollow container for body shampoo (Example 2 ) was formed.
[0028]
(3) Evaluation The above-mentioned (I) hollow container for hair shampoo, (b) hollow container for hair rinse, and (c) hollow container for body shampoo were given to 10 blind people who had previously taught the identification method. As a result of testing and testing, the container in which all were embossed and six perforations with a diameter of 5 mm was (i) 600 yen for a hollow container for hair shampoo, and embossed on both sides and five perforations with a diameter of 5 mm. The opened container is 500 yen for (b) a hair rinse hollow container, and (c) a body with 4 1/4 embossing, 4 holes with a diameter of 5 mm and 5 holes with a diameter of 3 mm. It was easily applied that it was a hollow container for shampoo.
[0029]
【The invention's effect】
Such a method for producing a labeling container according to the present invention is capable of identifying even blind people such as blind people, embossed patterns with 40 to 200 wire / inch , perforations, perforations, braille. , (v) since printing with foaming ink, the identification mark is a label that has been subjected, it is possible to read the label in hand feeling, the contents in the container to blind people eye blind etc. You can purchase or use the product after knowing it.
Therefore, the manufacturer can reduce the types of molds by simply applying identification marks on the labels without changing the molds for forming the containers for each type or grade of contents in the containers. Cost increase can be suppressed.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 shows a hollow for label-attached body shampoo in which an in-mold molding label with an embossed and large / small perforated identification mark attached by the method for manufacturing a label-attaching container of the present invention is attached. It is a perspective view of a container.
[Explanation of symbols]
1 Label sticking container 2 In-mold label 3 Emboss 4 Perforation (large)
5 Perforation (small)

Claims (4)

(I) Embossed pattern of 40 to 200 wire numbers / inch , (ii) perforation, (iii) perforation, (iv) on a part of the surface of a stretched microporous resin film having a porosity of 5 to 60% ) Braille, subjected to at least one identification mark selected from printing, by (v) foaming ink, a and labels also left flat portion, the identification mark has been placed in a mold in contact with the mold wall Thereafter, in-mold molding is performed in the mold, and the label is integrally fused to the resin container.   In-mold molding, after placing the identification mark in contact with the mold wall, the molten resin sheet is guided into the mold by vacuum molding or pressure forming, or the molten parison is guided by hollow molding or melting. The manufacturing method of the label sticking container of Claim 1 which resin-molds resin. Part of the surface of the stretched microporous resin film having a porosity of 5 to 60%, (i) Embossed pattern with 40-200 wires / inch, (ii) Perforation, (iii) Perforation, (iv) Braille, (v) An in-mold molding label characterized in that at least one type of identification mark selected from printing with foamed ink is applied and a flat surface portion is also left. Part of the surface of the stretched microporous resin film having a porosity of 5 to 60%, (i) Embossed pattern with 40-200 wires / inch, (ii) Perforation, (iii) Perforation, (iv) Braille, (v) After placing a label having at least one type of identification mark selected from printing with foamed ink and leaving a flat portion in the mold so that the identification mark is in contact with the mold wall, A label adhering container obtained by performing in-mold molding and fusing the label integrally with a resin container.

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