JPH055653B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a method for manufacturing a labeled plastic container, and more specifically, it is possible to prevent labels from sticking or blocking when stacked together, and to facilitate in-mold label operation. The present invention relates to a method for firmly adhering a label to the side wall of a container that is being formed. (Prior art) Attaching a label that indicates the contents to a blow-molded container has an important meaning in terms of packaging technology because it increases the commercial value of the packaged product and stimulates consumers' desire to purchase. There is. It has been known for a long time to apply labels to blow-molded containers by in-mold label operation.The label to be affixed to the inner surface of the cavity of a molding die is held by means such as vacuum suction, and the label is applied inside the mold. A method of blow-molding a plastic parison is generally employed (for example, Japanese Patent Laid-Open No. 61-202818). It is also already known to use a laminate of a solid polymer tank, a foam layer, and a polymer solution layer as a plastic label (Japanese Patent Application Laid-Open No. 1983-1989-1).
123333, 60-183343 and 60-242490). (Problems to be solved by the invention) As labels for in-mold label operations, labels based on plastic film have advantages such as being able to print on the back side, providing clear images, and having excellent stain resistance. It is advantageous to use heat-sensitive adhesives, especially hot melt adhesives, since they are desirable because they have a high temperature and are advantageous in that they utilize the heat of the plastic container wall being formed to effect the bonding. However, with thermoadhesive film labels that are based on plastic film and use hot melt adhesive as adhesive, it is difficult to accurately feed the labels one by one during in-mold label operation, and the edges of A problem arises in that a plurality of labels are supplied in a stacked state. The reason for this is that because the film is highly smooth, it is easy for the film labels to stick together, and the hot melt adhesive is sensitive to heat.
As a result, it tends to stick depending on environmental conditions and the like. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems that occur when manufacturing labeled plastic containers by in-mold labeling operations, and to reliably supply heat-adhesive film labels one by one in a separated state. The object of the present invention is to provide a method for forming a strong adhesive bond between the plastic container and the side wall of the plastic container being formed. Another object of the present invention is to provide a method for smoothly and reliably manufacturing labeled plastic containers by in-mold labeling operations. (Means for Solving the Problems) According to the present invention, a single layer or multilayer plastic is molded in a mold with a label pasted on the inner surface of the cavity, and a label is attached to the side wall surface of the container to be formed. In a method for manufacturing a labeled plastic container, the label is made of a plastic film layer, a printed layer provided on the inner surface side of the film layer, and a hot melt adhesive layer provided on the printed layer. In the heat-adhesive film label, either the printed layer or the hot melt adhesive layer contains resin and/or inorganic beads with a particle size of 0.1 to 100 μm, and the center line average roughness of either surface ( JIS B-0601) from 0.2 to 50μ
A label attachment characterized in that a label having a range of m is used, and each label is sucked and held one by one from a magazine containing a large number of labels, transferred into a mold, and affixed to the mold surface. A method of manufacturing a plastic container is provided. According to the present invention, there is also provided a labeled plastic container, which comprises molding a single tank or multilayer plastic in a mold with a label affixed to the inner surface of the cavity, and bonding the label to the side wall surface of the formed container. In the manufacturing method, the label includes a plastic film layer, a printing layer provided on the inner surface side of the film layer, a hot melt adhesive layer provided on the printing layer, and a printing layer provided on the outer surface side of the film layer. In a heat-adhesive film label consisting of an overcoat layer, either the printing layer, the hot melt adhesive layer or the overcoat layer has a particle size.
Use a label that contains resin and/or inorganic beads of 0.1 to 100 μm and has one surface with a centerline average roughness (JIS B-0601) in the range of 0.2 to 50 μm, and a large number of such labels A method for manufacturing a labeled plastic container is provided, which comprises sucking and holding each label from a magazine containing the labels, transferring the labels into a mold, and pasting them onto the mold surface. (Function) In the present invention, a label consisting of a plastic film layer, a printing layer provided on the inner surface of the film layer, and a hot melt adhesive layer provided on the printing layer is used. An overcoat layer may be provided on the outer surface of the film layer. A large number of heat-adhesive labels are stacked and stored in a magazine, and the magazine is taken out by suction, held and transferred into a mold, and affixed to the mold surface. Plastic film is used as a base for labels because it has excellent smoothness, wet strength, and stain resistance. The printing tank is provided on the inner side of the film so that the printed image can be seen through the transparent film layer.This allows beautiful and clear printed images to be reproduced, and also prevents contamination of the printed layer during storage and transportation. This is because it also prevents damage. The hot-melt adhesive layer is provided on the printing layer so that the label can be thermally bonded to the side wall of the container using the heat of the side wall of the container that is being formed. Further, when an overcoat layer is provided on the outer surface of the plastic film, this overcoat layer protects the film and improves the texture and appearance of the label surface. In the present invention, particle size is added to any of the above-mentioned printing layer, hot melt adhesive layer, or overcoat layer.
0.1 to 100μm, especially 10 to 70μm resin and/or
A remarkable feature is that the center line average roughness (JIS B-0601) of either surface is in the range of 0.2 to 50 μm, especially 0.3 to 20 μm, and that it contains beads made of inorganic material. Eliminates the tendency to stick or block when stacked, ensuring that adhesive film labels are supplied separately one by one, without sacrificing the excellent thermal adhesion, smoothness, and decorative effect inherent in adhesive film labels. Furthermore, in the in-mold label operation, good adhesion can be achieved due to the anchoring effect between the label and the side wall of the container that is being formed. The beads used in the present invention are also called spherical fillers, and unlike ordinary fillers,
Each particle has a clear spherical particle shape where each particle is independent (without agglomeration), and the particle size is large and has a sharp distribution. When these beads are included in a coating composition and applied to a film to form a film, protrusions are formed on the surface in the areas where the beads are contained. At this protrusion, beads may be exposed on the surface,
The surface of the bead may be covered with a hot melt adhesive resin or an overcoat resin, but in either case, a rough surface corresponding to the centerline average roughness described above is formed. FIG. 4 of the accompanying drawings shows an enlarged view of the surface structure of the hot melt adhesive of the heat-adhesive film label of the present invention, where the gray background shows the hot melt adhesive resin and the black background shows the beads. It can be seen that surface protrusions are formed based on . According to the present invention, by forming protrusions or rough surfaces on the surface of the heat-adhesive film label, a sufficient gap is maintained between the overlapped label surfaces, and the labels are closely attached to each other without any gaps. This also prevents mutual adhesion even if the surface of the hot melt adhesive layer becomes somewhat sticky due to environmental changes. In addition, since the beads used in the present invention are spherical particles with the smallest surface area per volume; they do not impede the workability of applying hot melt adhesives, and during in-mold labeling operations, they can be used on the side walls of plastic containers that are being formed. An anchoring action is performed between the
This provides excellent adhesion. It is important for the bead particles to be within the above-mentioned range in terms of prevention of blocking, anchoring effect, and thermal adhesion; if the particle size is smaller than the above range, there will be no significant effect on preventing blocking and the anchoring effect will also be poor. If the particle size is small and larger than the above range, it tends to cause poor thermal adhesion and a decrease in label smoothness. The beads used in the present invention may of course have a solid structure, but in order to effectively form a surface protrusion structure or a rough surface structure with a small amount of addition, it is desirable that the beads have a hollow structure or a foam structure. Also, from a similar standpoint, beads should generally have an apparent density within the above range. The content of beads is preferably in the range of 3 to 40% by weight based on the coating composition (the entire hot melt adhesive), and if it is less than this range, the anti-blocking effect and anchoring effect will be lowered, and if it is less than this range, the content will be lower than this range. If the amount is too large, it is unfavorable in terms of thermal adhesiveness. The bead-containing adhesive layer can be applied to the label substrate film with a relatively uniform thickness;
It is preferable to form the protrusions made of beads in a fixed pattern from the viewpoint of anti-blocking effect and anchoring effect. This cell pattern has 10 to 150 lines per inch (2.5 cm), especially 15 to 150 lines per inch (2.5 cm).
It is best to have 100 pieces. Formation of the cell pattern is performed by using a gravure roll or screen for application of the adhesive bath. (Preferred Embodiment of the Invention) In FIG. 1 showing an example of a heat-adhesive film label used in the present invention, this label 1 includes a plastic film substrate 2, a printed layer 3 applied to the back side thereof, and a printed layer 3 applied to the surface of the printed layer. It consists of a hot melt adhesive layer 4. The plastic film substrate 2 is generally uniaxially or biaxially stretched and transparent, and the printing layer 3 is passed through the film layer.
You will see. The printing layer 3 is a so-called back-printed layer of printing ink, and may be a multiple printing tank such as an image area and a background, and the background may be made of a metal vapor-deposited layer.
The hot melt adhesive layer 4 is mainly made of a thermoplastic resin that can be thermally bonded by the heat of the side wall of the plastic container during thermoforming. In the present invention, either the printing layer 3 or the hot melt adhesive layer 4 preferably contains beads described below. In FIG. 2 showing another example of a heat-adhesive film label, this label 1 also includes a film base 2, a printing layer 3, and a hot melt adhesive layer 4, as in the case of FIG. An overcoat layer 5 is further provided on the outer surface of 2. This overcoat layer 5 can also contain resin and/or inorganic beads. The beads used in the present invention are made of a thermoplastic resin, a thermosetting resin, or an inorganic material such as various ceramics, glass, silica, or shirasu, and have the above-mentioned particle size and preferably have the above-mentioned apparent density. It is. It is generally preferred that these beads consist of hollow bodies or foam bodies. Hollow or foamed beads of various resins can be obtained by first producing expandable fine particles of resin using microencapsulation technology, then foaming the expandable particles with steam, hot water, hot air, etc., and drying if necessary. These particle structures may be any of single capsules, multinuclear capsules, capsule clusters, and the like. Suitable examples of thermoplastic resins are polyolefins such as polyethylene and polypropylene; polystyrene and styrene copolymers; acrylic resins such as acrylate/acrylonitrile copolymers; vinylidene chloride or vinyl chloride copolymers; polyamides, etc.; Suitable examples of curable resins are phenolic resins, urea resins, and epoxy resins. Inorganic beads can be made by heating and foaming minerals such as expanded pearlite foamed shirasu, glass-walled capsules such as glass balloons, or ceramic glass capsule clusters (closed micro-cell groups). (containing spherical objects) may also be used. It may also be a spherical silica hollow body, a spherical carbon hollow body, or various spherical ceramic hollow bodies. These various beads can be used alone or in combination of two or more types. For example, resin beads and inorganic beads can also be used in combination. In the present invention, examples of plastics constituting the label substrate include crystalline polypropylene,
Crystalline propylene-ethylene copolymer, crystalline polybutene-1, crystalline poly-4-methylpentene-
1. Polyolefins such as low-, medium-, or high-density polyethylene; aromatic vinyl polymers such as polystyrene, styrene-butadiene copolymer; halogenated vinyl polymers such as polyvinyl chloride and vinylidene chloride resin; acrylonitrile- Nitrile polymers such as styrene copolymers and acrylonitrile-styrene-butadiene copolymers; polyamides such as nylon 6, nylon 6,6, para- or metaxylylene adipamide; polyesters such as polyethylene terephthalate, polytetramethylene terephthalate, etc. various polycarbonates; thermoplastic resins such as polyacetals such as polyoxymethylene; The thickness of the stretched film is generally 20 to 300 μm, particularly preferably 50 to 150 μm. Further, as the label base material, a plastic base material such as the one described above to which aluminum vapor deposition has been applied or a material laminated with aluminum foil may be used. As the hot melt adhesive, any hot melt adhesive known per se can be used, but generally the vinyl acetate content is 5 to 5.
Ethylene-vinyl acetate copolymer (EVA) with a content of 40% by weight, ethylene-ethyl acrylate copolymer (EEA) with an acrylic acid content of 5 to 40% by weight
, low density polyethylene (LDPE), EVA, EEA
Ethylene resins such as Ethylene resins such as Ethylene resins, and 5 to 30% by weight of tackifiers such as rosins, terpene resins, petroleum resins, and styrene resins are used in combination with these resins. The hot melt adhesive resin is generally applied on the base film to a thickness of 3 to 40 μm, particularly 5 to 15 μm.
It is best to provide an average thickness of . Note that the printing layer can be formed by a method known per se,
For example, the overcoat layer can be formed by letterpress printing, intaglio printing, gravure printing, lithography or offset printing, silk screen printing, thermal transfer printing, electrophotographic printing, etc. The overcoat layer can be formed using acrylic resin, vinyl chloride resin, cellulose derivative, etc. This can be done using a resin solution with excellent transparency. In the present invention, beads are dispersed in a hot melt adhesive solution or aqueous dispersion to prepare a coating composition, and this composition is applied to a gravure roll having a cell pattern on its surface, and then applied to a label. As this type of gravure roller, one called an anilox roller or a precision roller is preferably used, and the cell pattern is pyramid-shaped, lattice-shaped, trapezoidal, diagonal, or tortoiseshell-shaped. is used. A similar cell pattern is formed when the coating is applied through a screen. The thermoadhesive film label of the present invention is particularly advantageously used in the production of labeled containers by in-mold labeling operations on plastic containers. In FIG. 3 for explaining the in-mold label operation, in step A, prior to blow molding the plastic parison, blow molds 11a and 11b are
are in an open state, and a label 1 is previously applied to the cavity surface 6 of at least one of these. That is,
The cavity surface 6 has a part for supporting the label 1, a vacuum suction mechanism 7 is provided in this part, and the label 1 is held on the cavity surface 6 by a suction. In this case, the label is positioned such that the plastic film base 2 is on the outside and the hot melt adhesive resin layer 4 is on the inside. label 1
The application and fixing of the material to the cavity surface 6 is not limited to suction, but can also be carried out, for example, by electrostatic electricity. Next, in step B, the molten plastic parison 9 is extruded from the die 8, and the blow mold 11
a and 11b are closed, and a pressurized substrate is blown into the closed parison 9. In step C, the parison expanding in the mold is held on the mold surface and pressed against the label 1 to bring them into close contact, and the expanded parison comes into contact with the mold surface and is cooled, forming the labeled container 10. becomes. Blow molding includes direct blow molding using horizontal rotary blow molding machines, vertical rotary blow molding machines, etc., as well as any blow molding methods such as injection blow molding, two-stage blow molding, sheet forming, and stretch blow molding. It can be done by molding, injection molding, or compression molding. In FIG. 5, which shows a schematic arrangement of an apparatus suitably used for producing the labeled plastic container of the present invention, a large number of blow split molds 11a and 11b are arranged around the turret 12, with the axis of the turret 12 being centered. It is arranged to be able to rotate, and along its circumferential state movement path, a labeling area A, a parison extrusion area B, a blow molding cooling area C, a flash collection area D, and a bottle removal area E are arranged in this order. Placed. For ease of understanding, in the labeling area A, the parison extrusion area B, the flash collection area D, and the bottle removal area E, one of the blow molds 1
1a only is shown, and the split molds 11a, 11b are provided with a cavity surface 6 of a size and shape corresponding to the outer surface of the container (bottle) to be molded. The parting surfaces of the blow split molds 11a, 11b are parallel to the plane of FIG. 5, and can be opened and closed by a cam 19 in a direction perpendicular to this surface. In label pasting area A, split molds 11a, 11b
is in the open position, and this area A is provided with a label magazine 13 and a labeling mechanism, generally designated 14. As shown in detail in FIG. 6, the label magazine 13 includes a cylindrical accommodating portion 15 for accommodating the labels 1, a label take-out portion 16 located at one end of the cylindrical accommodating portion, and the other end of the cylindrical accommodating portion. A spring member 17 for pressing the labels provided on the label 1 is provided in the storage portion 15, and a large number of labels 1 are stored in a stacked state. The label take-out section 16 is provided with a small claw (separation claw) 18 for making it possible to take out the labels one by one. In this specific example, label magazines are provided in pairs for the purpose of attaching labels to the front and back surfaces of containers. The label pasting mechanism 14 includes a suction cup 20 that suctions and holds the label 1 with a vacuum, an arm 21 that supports the suction cup 20, and an arm 21 that supports the suction cup 20.
It consists of a horizontal reciprocating mechanism 22 for horizontally reciprocating the arm, and a mechanism 24 for rotationally driving the arm around a shaft 23. To explain in more detail, the arm 21 supports the suction cup 20 on its radially distal end side, and its radially central end is pivotable on an annular sliding member 25 that is slidable along a shaft 23. It is connected to the. This annular sliding member 2
A mechanism 22 for horizontally reciprocating the cam 2
6 and a cam follower 27, and when the cam follower 27 moves toward the arm 21, the arm 21
swings to move the suction cup 20 to the opposite side (outside). In the specific example shown in FIG. 6, the arm 21 and the suction cup 20 are provided as a pair in a direction of 180 degrees with respect to the shaft 23, and are also provided in plane symmetry with respect to a plane perpendicular to the shaft 23. In addition, in FIG. 6, when the suction cup 20 in the upper position is aligned with the label magazines 13a, 13b, the suction cup 20 in the lower position is in alignment with the split molds 11a, 13b.
It has a consistent relationship with 1b. In step 1 of Fig. 6, the upper suction cup 2
0 is in a state in which the label 1 is not held, while the lower suction cup 20 is in a state in which the label 1 is held. Moreover, these suction cups 20 are all attached to the label magazines 13a, 13b and the split mold 11.
It is in a position retreated from a and 11b. From this state, the horizontal reciprocating cam 26 is driven, and the suction cup 20 is driven forward toward the label magazines 13a, 13b and the split molds 11a, 11b.In step 2 in FIG. , 13b. Further, the lower suction cup 20 adheres the label 1 it holds to the cavity surface 6 of the split molds 11a, 11b. In the specific example shown in FIG. 6, the split molds 11a and 11b have their cam mechanisms 19
The label 1 is moved to close by a small distance, and the label 1 is smoothly attached to the cavity surface 6. In step 2 of Figure 6,
A vacuum acts on the upper suction cup 20 to hold the label 1. Vacuum is blocked from the lower suction cup 20, and the label 1 is released and held by the suction mechanism (suction mechanism 7 in FIG. 3) in the split molds 11a and 11b. Next, the horizontal reciprocating cam 26 is driven, and each suction cup 20
is retreated to the position shown in step 3 of FIG. Step 3
From this point, the shaft 23 rotates 180 degrees, and the suction cup 20 holding the label 1 reaches the stroke 1 in FIG. 6, after which the same stroke as described above is repeated. Returning again to FIG. 5, in the parison extrusion zone B, the molten plastic parison 9 is passed from the die 8.
extrude. This parison 9 is divided into molds 11a and 11b.
is closed, a bottom is formed by pinch-off, and fluid is blown into the blow molding cooling area C.
Then, a labeled plastic container 10 is formed.
In the flash collection area D, open the split molds 11a and 11b and transfer the flash to the flash collection chute 28.
In the bottle take-out area E, the labeled bottle 10 is removed from the mold 11 by the bottle gripper 29.
is taken out and discharged to the transport mechanism 30. In the present invention, the thermoplastic resin exemplified for the film substrate for labels is used as the thermoplastic resin constituting the plastic container. Plastic containers can have a single layer or multilayer construction, such as containers made of a single layer of polyolefin or polyethylene terephthalate,
Examples include multilayer containers in which polyolefin or polyethylene terephthalate are used as inner and outer layers, and a gas barrier thermoplastic resin is provided as an intermediate layer between these layers. Gas barrier resins include ethylene-vinyl alcohol copolymers with an ethylene content of 50 to 20 mol%; polyamides containing xylene groups; gas barrier polyesters; polymers containing high nitrile groups; vinylidene chloride resins, etc. Gas barrier resins known per se can be used. When there is no adhesiveness between the inner and outer layers and the intermediate layer, adhesive resins such as acid-modified olefin resins, various copolyamides, and various copolyesters may be contained between them. 5 and 6 illustrate blow molding of a molten plastic parison, stretch blow molding or injection molding of a plastic preform held at a drawing temperature, and furthermore, a plastic sheet held at a melting temperature or a drawing temperature. vacuum forming,
It should be understood that the present invention also applies to pressure molding, plug assist molding, and the like. Hot melt adhesives used for labels include:
It goes without saying that a material that exhibits thermal adhesion at or slightly lower than the melting temperature or stretching temperature of the plastic to be molded is selected depending on the type of plastic and the processing temperature. (Effects of the Invention) According to the present invention, resin and/or inorganic beads having a particle size of 0.1 to 100 μm are contained in any of the printing layer, hot melt adhesive layer, or overcoat layer of a heat-adhesive film label. and the center line average roughness of either surface (JIS B-0601 0.2
By using labels in the range of 50 μm to 50 μm, it is possible to reliably supply and affix labels one by one to the split cavity surface, making it possible to manufacture labeled plastic containers with high productivity and by in-mold label operation. It became possible. Furthermore, this label had excellent adhesion to the side wall of the plastic container, and was prevented from coming off even under severe conditions. EXAMPLES The invention is illustrated by the following examples. Example 1 One side of a 100 μm thick biaxially stretched film made of an ethylene-propylene random copolymer with a melting point of 137°C was printed, and EVA was further applied on top of it.
45 wires of a solvent-based hot melt adhesive containing 10% by weight of acrylic hollow beads (with a vinyl acetate content of 20wt%) and a rosin resin with a volume average particle diameter of 40μm and an apparent density of 0.5g/cc. It was applied using a grid-type gravure roll and dried. The center line roughness of the adhesive surface of the obtained label base material was 1.2 μm. Next, square labels with a length of 90 mm and a width of 60 mm are punched out from the obtained label base material, and approximately 500 labels are stacked and loaded into the magazine of the in-mold labeling device shown in Figure 6, with the suction cup attached to the tip. The labels were taken out one by one from the magazine using the attached label sticking head and placed in the blow mold shown in FIG. In this way, in the operation of taking out labels one by one from the magazine using the suction cup, no double labels were taken at all. Next, by the process shown in FIG. 5, it was attached to the surface of a bottle made of ethylene-propylene copolymer having a molding shrinkage rate of 1.2% and a melting point of 157°C.
In this case, the molten resin temperature of the ethylene-propylene copolymer parison is 210℃, and the blow mold temperature is 8℃.
It was hot. Additionally, the temperature of the label adhesive surface during boro-molding reached a maximum of 165°C. The appearance of the in-mold label bottle thus obtained was very good, and no wrinkles on the label or deformation of the bottle were observed. Furthermore, the adhesive strength between the label and the bottle was measured and was found to be 450 g/15 mm. Comparative Example 1 In Example 1, when a label to which acrylic beads were not added was used as the hot melt adhesive, two sheets were taken out at a frequency of 4% in the operation of taking out the label from the magazine with a suction cup. Examples 2 to 5 In-mold label bottles were molded in the same manner as in Example 1 using adhesives prepared by adding various bead materials shown in Table 1 to the various adhesive materials shown in Table 1. I went. In this case, the labels could be taken out smoothly from the magazine, and there was no occurrence of double taking. Furthermore, the label adhesive strength of the obtained in-mold label bottles is as shown in Table 1, and the adhesiveness was good in all cases.

【table】

【table】 [Brief explanation of drawings]

FIG. 1 is a diagram showing an example of the cross-sectional structure of the label of the present invention, FIG. 2 is a diagram showing another example of the cross-sectional structure of the label of the present invention, and FIG. 3 is a diagram showing an example of the cross-sectional structure of the label of the present invention. FIG. 4 is an enlarged view showing the surface structure of the hot melt adhesive of the label of the present invention, and FIG. 5 is a diagram illustrating the operation. FIG. FIG. 6 is a schematic layout diagram showing a label pasting mechanism. Reference number 1 is the label, 2 is the plastic film substrate, 3 is the printing ink layer, 4 is the adhesive layer, 5 is the overcoat layer, 6 is the cavity surface, 7 is the vacuum suction mechanism, 8 is the die, 9 is the parison, 10 11 is a container with a label, 11 is a blow mold, 12 is a turret, 13 is a label magazine, 17 is a spring member, 19 is a cam mechanism, 20 is a suction cup, 21
24 is an arm, 24 is a rotational drive mechanism, 25 is an annular sliding member, 28 is a flash collection sheet, 29 is a bottle gripper, and 30 is a conveyance mechanism.

Claims (1)

[Claims] 1. A plastic container with a label, which is formed by molding a single layer or multilayer plastic in a mold with a label affixed to the inner surface of the cavity, and bonding the label to the side wall surface of the formed container. In the manufacturing method, the label is a thermoadhesive film label comprising a plastic film layer, a printing layer provided on the inner surface side of the film layer, and a hot melt adhesive layer provided on the printing layer,
Either the printing layer or the hot melt adhesive layer contains resin and/or inorganic beads with a particle size of 0.1 to 100 μm, and the center line average roughness (JIS B-0601) of either surface is 0.2 to 100 μm. A label attachment characterized in that labels with a thickness in the range of 50 μm are used, and each label is sucked and held from a magazine containing a large number of labels, transferred into a mold, and affixed to the mold surface. Method of manufacturing plastic containers. 2. A method for producing a labeled plastic container, which comprises molding a single or multilayer plastic in a mold with a label affixed to the inner surface of the cavity, and bonding the label to the side wall surface of the formed container. It consists of a plastic film layer, a printed layer provided on the inner surface of the film layer, a hot melt adhesive layer provided on the printed layer, and an overcoat layer provided on the outer surface of the film layer. In a thermally adhesive film label, resin and/or inorganic beads with a particle size of 0.1 to 100 μm are contained in any of the printing layer, hot melt adhesive layer, or overcoat layer, and the center line average of either surface is Roughness (JIS B-
0601) with a diameter in the range of 0.2 to 50 μm, each label is sucked and held from a magazine containing a large number of labels and transferred into a mold,
A method for manufacturing a plastic container with a label, which is characterized by pasting it on a mold surface.