JP2008137663A - In-molded article and its manufacturing process - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an in-molded article in which a three-dimensional pattern can easily be imparted to the surface of a label. <P>SOLUTION: In the in-molded article in which the label 3 is fixed to a resin plastic body 2 by in-molding, the label 3 is formed from a laminated body which keeps at least an embossed non-woven layer 33 and a film layer 34 overlying one on top of the other, and the label 3 is fixed to the resin plastic body 2 by in-molding so that the film layer 34 comes to outside. Polypropylene film that has a thickness of 5 to 50 μm and is substantially heat unshrinkable is used as a film layer. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an in-mold molded product molded by in-mold molding and a method for manufacturing the same. More specifically, the present invention relates to an in-mold molded product having a concavo-convex pattern formed on the surface and a method for producing the same.

Conventionally, in-mold molded products are used as molded products made of various synthetic resins such as various containers such as shampoos and rinses, containers for food storage, and cup-shaped containers for containing beverages.
An in-mold molded product is a molded product manufactured by a method in which a sheet placed in a mold and a resin are integrally molded. For in-mold molding, in detail, a sheet (hereinafter referred to as a label) on which a desired display such as a trade name and a design is printed is placed in a mold and held, and a molten resin is injected into the mold ( This is a molding method for obtaining a molded product by injecting a molten resin (blow molding) or integrating the label with the resin by heat and pressure of the molten resin.
In the obtained molded product, the resin part and the label constituting the molded product are made of the same material, and both are integrated.

Conventionally, it has been disclosed to use a base material on which a nonwoven fabric is laminated as a label of an in-mold molded product (Patent Document 1).
A label having such a nonwoven fabric has a heat insulating property. Therefore, the in-mold molded product to which the label is fixed has a heat insulating property. For example, even if the contents put in the molded product are hot, the heat is hardly transmitted to the handle.

However, the conventional in-mold molded product with a label imparts decorations such as colors and letters by applying design printing to the labels, but such decorations are flat. For this reason, there is a limit to the decorative property of the in-mold molded product, and the improvement is demanded.
JP 7-521192 A

  Then, this invention makes it a subject to provide the in-mold molded product which can show a three-dimensional pattern easily on the label surface, and its manufacturing method.

  As a result of earnest research on the label for in-mold molding having the above nonwoven fabric, the present inventors have found that an embossed nonwoven fabric can be used to show an uneven pattern on the surface of the label. The present invention has been completed.

  The first means of the present invention is an in-mold molded product in which a label is fixed to a resin molded body by in-mold molding, and the label is formed by laminating at least an embossed nonwoven fabric layer and a film layer. The label is fixed to the resin molded body by in-mold molding with the film layer on the outside.

In such an in-mold molded product, the film layer of the label changes to an uneven shape due to the embossed unevenness applied to the nonwoven fabric during the in-mold forming. Accordingly, it is possible to provide an in-mold molded product in which an uneven pattern appears on the surface of the label and a three-dimensional pattern appears on the label.
Moreover, since the nonwoven fabric layer is laminated | stacked on the label, the part to which the label was fixed among in-mold molded articles has heat insulation. In particular, since the in-mold molded product of the present invention has an uneven surface as described above, the contact area of the handle is reduced. For this reason, the in-mold molded product of this invention is further excellent in heat insulation.

Moreover, the preferable aspect of this invention provides the in-mold molded article in which the said film layer contains the thermoplastic resin film of thickness 5-50 micrometers which does not heat shrink substantially.
Furthermore, the preferable aspect of this invention provides the said in-mold molded article in which the said film layer contains a polypropylene-type film.
An in-mold molded product using a label having such a film layer is a preferred embodiment because a good concavo-convex pattern is formed on the label surface during in-mold molding.

  Further, the second means of the present invention is to hold a label in which at least an embossed nonwoven fabric layer and a film layer are laminated and hold the label in the mold with the film layer facing the inner surface of the mold. Provided is a method for producing an in-mold molded product in which a molten resin is brought into contact with the label by molding.

According to such a method for producing an in-mold molded product, the surface of the film layer can be changed to unevenness due to the embossed unevenness of the nonwoven fabric layer.
Therefore, an in-mold molded product having an uneven pattern on the label surface can be obtained. As described above, an in-mold molded product having a three-dimensional pattern can be easily manufactured by using a non-woven fabric subjected to embossing as a label in the same manner as a conventional in-mold molding method.

The in-mold molded product according to the present invention can show a three-dimensional pattern by using a label having an embossed nonwoven fabric layer. Therefore, it is possible to provide an in-mold molded product with high decorativeness.
Moreover, the manufacturing method of the in-mold molded product of this invention can manufacture the said in-mold molded product easily.

Hereinafter, the present invention will be specifically described with reference to the drawings.
FIG. 1 shows a front view of an in-mold molded product. FIG. 2 is a cross-sectional view taken along the line II of FIG. However, FIG. 1 and FIG. 2 do not show the uneven pattern that appears on the surface of the label 3.

  1 and 2, reference numeral 1 denotes an in-mold molded article having a resin molded body 2 molded by in-mold molding and a label 3 fixed to the surface portion of the resin molded body 2 by in-mold molding. Indicates.

The resin material which comprises the resin molding 2 will not be specifically limited if it is a thermoplastic resin, A well-known material can be used suitably. Examples of the resin material include high density polyethylene, polypropylene, polyester, polystyrene, polyvinyl chloride, and polycarbonate. The resin material is normally non-foamed, but may be foamed in some cases. Among these, high density polyethylene, polypropylene, polyester, polystyrene and the like are preferable. The resin molded body 2 can be molded by injection molding, blow molding, differential pressure molding, compression molding, foam molding, or the like on condition that the label 3 is in-mold. Among these, when the resin molded body 2 is molded by injection molding or blow molding, it is preferable because the label 3 can be well integrated with the resin molded body 2.
The thickness of the resin molded body 2 is not particularly limited, but is preferably 0.5 mm or more, and more preferably 0.8 mm or more in order to obtain a molded body having a certain degree of rigidity.

The use of the in-mold molded product 1 of the present invention is not particularly limited, and various containers (bottle-type containers, box-shaped containers, cup-shaped containers, etc.) for storing beverages, foods, sanitary products, chemicals, supplements, cosmetics, toys, etc. The so-called containers such as) are typical uses, but can also be applied to apparatus parts and the like as uses other than those related to the lid of these containers and other containers.
The shape of the in-mold molded product 1 is not particularly limited, and the in-mold molded product 1 is formed in an appropriate shape according to the application.
The illustrated in-mold molded product 1 exemplifies a cup-shaped container in which a beverage or the like is placed. As a shape of a cup-shaped container, a bottomed cylindrical shape whose diameter increases as it goes upward is exemplified. Note that various lids such as a removable fitting lid and a heat-sealed sheet lid are attached to the upper surface opening of the in-mold molded product 1 for such use in practice (these lids are not shown).

The planar shape of the label 3 is not particularly limited, and can be formed in a rectangular shape such as a rectangular shape, a polygonal shape such as a triangular shape, a circular shape, an elliptical shape, or any other planar shape.
The fixing position of the label 3 with respect to the resin molded body 2 is not particularly limited, and the label 3 can be fixed to an arbitrary position such as the trunk or bottom of the resin molded body 2. When the in-mold molded product 1 is used as a container such as a cup-shaped container, it is preferable to fix the label 3 to the body portion of the resin molded body 2. This is because the label 3 having a non-woven fabric has a heat insulating property, so that a heat insulating container can be formed by fixing the label 3 to a container body portion that is often held by hand.
The size of the label 3 is not particularly limited, and can be appropriately designed. For example, the label 3 may be fixed so as to cover the entire body part of the resin molded body 2, or the label 3 may be fixed to a part of the body part.
In the illustrated example, the label 3 is fixed so as to surround the periphery of the body portion, that is, a portion mainly held by hand, that is, a midway portion in the vertical direction of the body portion of the resin molded body 2.

  Such a label 3 is composed of a laminate in which an embossed nonwoven fabric layer 33 and a film layer 34 constituting the surface of the label 3 are laminated at least. As shown in FIG. 4, due to the embossing of the nonwoven fabric layer 33, a concavo-convex pattern is formed. Since the label 3 is fixed to the surface portion of the resin molded body 2 with the film layer 34 facing outside, the uneven pattern of the label 3 can be visually recognized.

Specifically, in a preferred configuration of the present invention, as shown in FIG. 3A, the label 3 includes a thermal adhesive layer 31 fixed to the surface portion of the resin molded body 2, an underlayer 32, and an embossing process. A laminated body in which the nonwoven fabric layer 33 provided with the film layer 34 constituting the surface of the label is laminated can be used.
Further, in another preferred configuration of the present invention, as shown in FIG. 3B, the label 3 includes a thermal adhesive layer 31 fixed to the surface portion of the resin molded body 2, and a non-woven fabric layer subjected to embossing. A laminate in which 33 and the film layer 34 constituting the surface of the label are laminated can be used.
In any of the layer configurations, design printing (not shown) is applied to the film layer 34 to display a desired display such as a trade name and a design as necessary. The design printing may be performed on either the front surface or the back surface of the film layer 34, but usually it is preferably performed on the back surface of the film layer 34.

  In any of these labels 3, a concavo-convex pattern appears on the surface of the film layer 34 in a state of being fixed to the resin molded body 2 by in-mold molding. The uneven pattern of the film layer 34 substantially corresponds to the uneven pattern of the nonwoven fabric layer 33, and the unevenness of the nonwoven fabric layer 33 is transferred to the film layer 34.

In the preferred configuration of the present invention, as shown in FIG. 4A, the label 3 has the surface of the film layer 34 embedded substantially flush with the surface of the resin molded body 2. In the label 3 of this mode, the end face of the peripheral portion of the label 3 is bonded to the resin molded body 2.
In another preferable configuration of the present invention, for example, as shown in FIG. 4B, a part of the film layer 34 and the nonwoven fabric layer 33 of the label 3 protrudes from the surface of the resin molded body 2. Although not particularly illustrated, the entire label 3 may protrude from the surface of the resin molded body 2 (in this case, only the back surface of the thermal bonding layer 31 of the label 3 is on the surface of the resin molded body 2. Glued).
Note that the in-mold molded product 1 in which a part or all of the label 3 is protruded from the surface of the resin molded body 2 may be molded using an in-mold molding mold in which a recess for housing the label 3 is formed. Good.

In the layer configuration of the label 3, the type of the heat bonding layer 31 is not particularly limited as long as it is bonded to the resin material constituting the resin molded body 2 by heating during in-mold molding. Examples of the thermal adhesive layer 31 include polypropylene, low density or medium density polyethylene, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-alkyl acrylate copolymer, ethylene-alkyl methacrylate. Examples thereof include ester copolymers and metal salts thereof. The thermal adhesive layer is preferably one having a melting point of about 60 to 150 ° C., although it varies depending on the material of the resin molded body 2. In addition, when using what formed these resin in the film form as the heat bonding layer 31, it is preferable to use this unstretched film. Among these, it is preferable to use an unstretched polypropylene film for the heat bonding layer 31.
In addition, the thickness of the heat bonding layer 31 is about 3-30 micrometers.

The underlayer 32 is laminated for the main purpose of imparting barrier properties and decoration to the label. As the underlayer 31, one kind of a known synthetic resin film, paper, synthetic paper, foamed resin sheet or the like, or a laminated film thereof can be used. Examples of the synthetic resin film include polyolefin films such as polypropylene, high density polyethylene, medium density polyethylene, and ethylene-cycloolefin copolymer, polyester films such as polyethylene terephthalate, vinyl halide films such as polyvinyl chloride, 6 , 6 nylon and other polyamide-based films, polystyrene, ABS and other polystyrene-based films, ionomer resin films and the like, or mixtures thereof. In addition, it is preferable to use a base layer 32 that does not substantially heat shrink. The fact that the film does not substantially shrink by heat is synonymous with the film layer 34 described below.
Moreover, metal foils, such as aluminum foil, may be laminated | stacked on the synthetic resin film which comprises the base layer 32 as needed. Further, aluminum, aluminum oxide, silicon dioxide, or the like may be deposited on the synthetic resin film. Among them, the base layer 32 is preferably a polyethylene terephthalate film having a metal foil or a vapor deposition layer.
In addition, the thickness of the base layer 32 is about 5-50 micrometers. The label 3 may not have the base layer 32.

As the nonwoven fabric layer 33, a nonwoven fabric produced by forming a sheet of polyester, polypropylene, polyethylene, rayon, nylon, cupra, natural fiber, or the like into a sheet by an adhesion method, a needle punch method, a spun bond method, a melt blow method, or the like is used. it can. As a fiber, it is preferable to use what has heat resistance like a polyester-type fiber. Moreover, it is preferable to use the nonwoven fabric layer 33 that does not substantially heat shrink. The fact that the film does not substantially shrink by heat is synonymous with the film layer 34 described below.
The nonwoven fabric fibers are preferably about 1 to 10d. This is because, if the fibers are too thin or too thick, even if embossing is performed, good irregularities may not be formed on the nonwoven fabric.
The basis weight of the nonwoven fabric is preferably about 10 to 100 g / m ^{2, and} more preferably about 15 to 50 g / m ² . This is because such a nonwoven fabric is excellent in air permeability due to a gap between fibers.
In addition, when the basis weight is small, the recessed portion 6 can hardly be formed. On the other hand, when the basis weight is large, the nonwoven fabric layer 33 shrinks randomly in the thickness direction during in-mold molding, and as a result, the uneven pattern of the film layer 34 is formed. This is because it looks bad.

For example, as shown in FIGS. 5 and 6, the embossing is performed on at least the surface 5a of the nonwoven fabric 5 (the surface 5a of the nonwoven fabric 5 means a surface on which the film layer 34 is laminated and bonded).
Here, embossing means the process which forms an unevenness | corrugation in the nonwoven fabric 5, For example, an unevenness | corrugation can be formed by pressing an embossing roller etc. to a nonwoven fabric.
The nonwoven fabric 5 only needs to have a plurality of recessed portions 6 formed on the surface 5a thereof. Therefore, as shown to Fig.6 (a) and (c), the aspect in which the recessed part 6 is formed in both the surface 5a and the back surface 5b of the nonwoven fabric 5, as shown in FIG.5 (b), the nonwoven fabric 5 of Any of the embodiments in which the recessed portion 6 is formed only on the front surface 5a and the back surface 5b is formed flat may be used.

  The planar shape of the recess 6 on the surface 5a of the nonwoven fabric 5 is not particularly limited, and any shape can be adopted. For example, the planar shape of the dent 6 may be an arbitrary shape such as a polygonal shape such as a circular shape, an elliptical shape or a triangular shape, a mesh shape, or a character shape such as an alphabet or a katakana in addition to a substantially rectangular shape as shown in FIG. You may form in.

Area per one recessed portion 6 (in the area on the bottom recessed) is preferably from 0.1 to 10 mm ^2, in particular, about 0.5 to 3 mm ² is more preferable. If the area of the recessed portion 6 is too small, the film layer 34 is not easily uneven. On the other hand, if the area of the recessed portion 6 is too large, the uneven pattern formed on the film layer 34 may not be formed beautifully. Because.
Moreover, about 10-30% of the occupation rate of the recessed part 6 per unit area of the nonwoven fabric 5 is preferable, and especially about 15-25% is more preferable. This is because a beautiful uneven pattern can be formed on the film layer 34 within such a range.
However, the occupancy ratio of the dents 6 = (the sum of the areas of the dents in the region where the plurality of dents 6 are formed in a scattered manner / the area of the region where the plurality of dents are formed in a scattered manner. Area) × 100.
Further, the depth of the recess 6 is preferably 5 μm or more, and more preferably 10 to 500 μm. This is because if the dent 6 is too shallow, a concavo-convex pattern does not substantially appear in the film layer 34.

The film layer 34 is preferably a transparent synthetic resin film. However, a colored film such as white can also be used. The material of the synthetic resin film is not particularly limited, and a conventionally known thermoplastic resin can be used. Examples of the resin material for the synthetic resin film include polyolefins such as polypropylene, polyesters such as polyethylene terephthalate, vinyl halides such as polyvinyl chloride, polyamides such as 6,6 nylon, polystyrenes such as polystyrene and ABS. One type or a mixture of two or more types such as a system and an ionomer resin can be used. The film layer 34 may be a laminate of two or more layers of the same type or different types. The film layer 34 is preferably one that does not substantially heat shrink at the in-mold forming temperature. The phrase “substantially does not shrink” means that the thermal shrinkage rate in one direction and the other direction (direction perpendicular to the one direction) of the film is 5% or less, preferably 3% or less.
However, the thermal contraction rate is obtained by the following formula when the film is immersed in 90 ° C. warm water for 10 seconds.
Formula: heat shrinkage rate (%) = [{(original length in one direction (or other direction)) − (length after immersion in one direction (or other direction))} / (one direction (or other direction) ) Original length)] × 100.

The film layer 34 is heat resistant enough to withstand in-mold molding, and can be deformed into a good concavo-convex shape, so that a polypropylene film is preferable, and a biaxially stretched polypropylene film is particularly preferable.
The thickness of the film layer 34 is preferably 100 μm or less, more preferably 5 μm to 60 μm, and particularly preferably 10 μm to 40 μm. This is because if the thickness of the film layer 34 is too thick, the film layer 34 may not be deformed into a beautiful uneven shape according to the embossing of the nonwoven fabric layer 33.

  A method for laminating each layer constituting the label can be performed by a conventionally known method. For example, a) a method in which each layer is formed into a film shape and laminated and bonded by a dry lamination method or the like, b) a method in which a resin constituting each layer is melt-extruded into a nonwoven fabric, and each layer is laminated, c) a resin in which each layer is formed And a method of laminating each layer by applying an emulsion or a solvent solution of the above to a nonwoven fabric, and d) a sand lamination method using a melt-extruded resin.

The in-mold molded product 1 can be manufactured in accordance with a conventionally known in-mold molding method on condition that a label having an embossed nonwoven fabric is used.
First, the embossed nonwoven fabric 5 is prepared. It is easy to form the embossing with an embossing roller or the like provided with desired unevenness.
The embossing roller is preferably pressed against the surface side of the nonwoven fabric 5, but if an unevenness can be formed on the surface of the nonwoven fabric 5 (lamination surface of the film layer), the embossing roller is applied from the back surface side of the nonwoven fabric 5. Also good. In this way, the recess 6 is formed on the surface of the nonwoven fabric 5.
A film constituting the film layer 34 is laminated on the front surface 5a of the nonwoven fabric 5 in which the dent 6 is formed, and a thermal adhesive layer 31 (or a base adhesive layer 32 is provided on the back surface 5b of the nonwoven fabric 5 as necessary). 31) are stacked (see FIG. 7). As for the obtained label original fabric, the surface 5a (part in which the dent part 6 is not formed) of the film layer 34 and the nonwoven fabric layer 33 has adhere | attached. The non-woven fabric 5 and the film layer 34 are preferably laminated by a dry laminating method.
The obtained original label is cut to prepare a label 3 having a predetermined shape.
This label 3 is disposed at a predetermined location on the inner surface of the divided mold. The label 3 is arranged with the surface side of the film layer 34 facing the inner surface of the mold. The label 3 is fixed to the inner surface of the mold, for example, by sucking through a suction hole formed in the mold.
Next, the resin material melted by heating is injected into the mold that is closed. Resin temperature (injection temperature), injection pressure, and the like are appropriately set according to the type of resin. For example, when a propylene-based resin is used as the resin, an injection temperature of 160 to 280 ° C. and an injection pressure of about 100 to 300 MPa are preferable.
In the case of blow molding, a hollow resin material (parison) softened by heating is inserted into a mold, and pressurized air is blown into the resin material. And this resin material contacts the back surface of the label 3, and the heat bonding layer 31 of the label 3 and the resin material adhere. In this way, the in-mold molded product 1 can be obtained.

  When the resin material comes into contact with the label during the in-mold molding, a concavo-convex pattern resulting from the concavo-convex of the nonwoven fabric layer 33 is formed on the film layer 34 of the label 3. Although this principle is not clear, it is guessed as follows. That is, the label 3 is pressed against the inner surface of the mold by the pressure during in-mold molding, and the nonwoven fabric layer 33 of the label 3 is compressed in the thickness direction. Thereafter, the portions other than the recessed portion 6 of the nonwoven fabric layer 33 are restored to a projecting shape, and the film layer 34 changes into an uneven shape accordingly, and the heated film layer 34 cools down to the surface of the film layer 34. It is inferred that an uneven pattern is formed.

Since the in-mold molded product 1 has a concavo-convex pattern formed on the surface of the label, it can show a three-dimensional pattern.
The in-mold molded product 1 can provide a highly decorative product due to a synergistic effect of the uneven pattern and design printing applied as necessary.
Moreover, since the nonwoven fabric layer 33 is laminated | stacked on the label 3, the part to which the label 3 was fixed among the in-mold molded articles 1 has heat insulation. Therefore, for example, if the fixing portion of the label 3 is held by hand, it is difficult to transmit heat or cold. In particular, since the surface of the label 3 is uneven in the in-mold molded product 1 as described above, the contact area of the handle is reduced. For this reason, the in-mold molded product 1 of this invention is further excellent in heat insulation.

  Next, the modification of this invention is shown. However, in the modifications shown below, explanations of the same configurations and effects as those in the above embodiment may be omitted, and terms and symbols may be used.

  Instead of the nonwoven fabric illustrated in the above embodiment, a heat-weldable material can be used. Examples of such a heat-weldable nonwoven fabric include a nonwoven fabric composed of fibers having a heat-weldable resin at least on the surface. Examples of the heat welding resin include polyethylene such as high density polyethylene and linear low density polyethylene, and polypropylene. Examples of such fibers include solid fibers or hollow fibers made of a heat-welding resin such as polyethylene, or fibers in which a heat-welding resin 72 is coated around the core 71 as shown in FIG. Is mentioned. Among these, since it is strong against pressurization and has excellent air retention, thermal welding of linear low-density polyethylene or the like around a polyamide-based core material 71 such as polyamide or nylon terephthalate such as nylon. A heat-weldable composite fiber coated with the conductive resin 72 is preferable. Examples of the nonwoven fabric having such heat-weldable fibers include trade name Elves (manufactured by Unitika Ltd.), trade name Alcima (produced by Unitika Ltd.), and the like.

Similarly, when such a heat-weldable nonwoven fabric is used, an embossed pattern is formed on the film layer 34 by embossing the nonwoven fabric layer 33.
However, according to the verification by the present inventors, when a heat-weldable nonwoven fabric is used, the film layer 34 has a convex shape corresponding to the recessed portion 6 of the in-mold nonwoven fabric layer 33 as shown in FIG. Has been found to be deformed. Although this principle is not clear, it is guessed as follows. That is, the embossed convex portion of the nonwoven fabric layer 33 and the film layer 34 are first melt-bonded by the pressure and heat during in-mold molding, and then air accumulates between the recessed portion 6 and the nonwoven fabric layer 33 where pressure is not relatively applied. . As a result, it is considered that the portion of the film layer 34 corresponding to the recessed portion 6 of the nonwoven fabric layer 33 swells by air and changes into a convex shape.

  Even when such a heat-weldable nonwoven fabric is used, it is the same as in the above embodiment in that an uneven pattern is formed on the surface of the label. However, as described above, the surface of the film layer 34 (label 3) protrudes from the portion corresponding to the recessed portion 6 of the nonwoven fabric layer 33. Therefore, in determining the design of the concavo-convex pattern, this point is taken into consideration. It is necessary to emboss the nonwoven fabric layer 33.

  Moreover, in the said embodiment, although embossing is given to the whole nonwoven fabric layer 33, embossing may be given to the one part area | region of the nonwoven fabric layer 33 (for example, planar rectangular shape) In the non-woven fabric layer 33, the central region is embossed).

  Hereinafter, the present invention will be described in more detail with reference to examples of the present invention. However, the present invention is not limited to the following examples.

(Films used)
Film A: Biaxially stretched polypropylene film having a thickness of 25 μm (trade name: FOR, manufactured by Futamura Chemical Co., Ltd.).
Film B: a biaxially stretched polyethylene terephthalate film having a thickness of 12 μm (trade name: E5102, manufactured by Toyobo Co., Ltd.).
Film C: a 12-μm thick biaxially stretched polyethylene terephthalate film in which aluminum is vapor-deposited (trade name: Diastar, manufactured by Reiko Co., Ltd.)
Non-woven fabric A: polyester-based non-woven fabric (manufactured by Toyobo Co., Ltd., trade name: Ecule, basis weight 50 g / m ² ).
Non-woven fabric B: Olefin-based non-woven fabric (manufactured by Unitika Ltd., trade name: Elves, basis weight 50 g / m ² ).
-Thermal bonding film: CPP film with a thickness of 30 μm.

[Example 1]
An embossing roll was applied to the surface of the non-woven fabric A, and embossing was performed. The embossing had a depth of 100 μm and an area of 0.75 mm ² for each recess (planar rectangular shape), and approximately 280,000 recesses were formed per 1 m ² at equal intervals.
A dry laminate adhesive was applied to one surface of the film A (thickness at the time of coating 5 μm), and this was bonded to the embossed surface of the nonwoven fabric A. The adhesive was applied to film C, and this was bonded to the back surface of nonwoven fabric A. Furthermore, a film for heat bonding was bonded to the back surface of the film C with the same adhesive to prepare a label original having a four-layer structure. This label original was cut into 8 cm × 8 cm in length and width to obtain a label for in-mold molding.
This label was placed in a mold of an in-mold molding machine, and polypropylene was injected (injection temperature 80 ° C., injection pressure 132.3 MPa) to form a bottomed cylindrical cup-shaped container having a thickness of 1 mm.
When the label surface of the obtained container was visually observed, a concavo-convex pattern in which a portion corresponding to the recessed portion of the nonwoven fabric was recessed was formed.

[Example 2]
An embossing roll was applied to the surface of the non-woven fabric A, and embossing was performed. The embossing had a depth of 100 μm and an area of 0.75 mm ² for each recess (planar rectangular shape), and approximately 280,000 recesses were formed per 1 m ² at equal intervals.
A dry laminate adhesive was applied to one surface of the film B (thickness at the time of coating 5 μm), and this was bonded to the embossed surface of the nonwoven fabric A. A film for heat bonding was bonded to the back surface of the non-woven fabric A with the same adhesive to prepare a label original having a three-layer structure. This label original was cut into 8 cm × 8 cm in length and width to obtain a label for in-mold molding.
This label was placed in a mold of an in-mold molding machine, and polypropylene was injected (injection temperature 80 ° C., injection pressure 132.3 MPa) to form a bottomed cylindrical cup-shaped container having a thickness of 1 mm.
When the label surface of the obtained container was visually observed, a concavo-convex pattern in which a portion corresponding to the recessed portion of the nonwoven fabric was recessed was formed.

[Example 3]
An embossing roll was applied to the surface of the nonwoven fabric B, and embossing was performed. The embossing had a depth of 130 μm and an area of 0.25 mm ² of one dent (planar rectangular shape), and approximately 1 million dents per 1 m ² were formed at equal intervals.
A dry laminate adhesive was applied to one surface of the film A (thickness at the time of coating 5 μm), and this was bonded to the embossed surface of the nonwoven fabric B. A film for heat bonding was bonded to the back surface of the non-woven fabric B with the same adhesive to prepare a label original having a three-layer structure. This label original was cut into 8 cm × 8 cm in length and width to obtain a label for in-mold molding.
This label was placed in a mold of an in-mold molding machine, and polypropylene was injected (injection temperature 80 ° C., injection pressure 132.3 MPa) to form a bottomed cylindrical cup-shaped container having a thickness of 1 mm.
When the label surface of the obtained container was visually observed, a concavo-convex pattern in which a portion corresponding to the recessed portion of the nonwoven fabric was recessed was formed.

[Comparative example]
An in-mold molded container was produced in the same manner as in Example 1 except that the embossing was not performed.
When the surface of the label of this container was observed visually and with a finger, it was flat.

The front view which shows one Embodiment of an in-mold molded product. The II sectional view taken on the line of FIG. (A) is an expanded sectional view of the circled enclosure II part of FIG. 2, (b) is an enlarged sectional view in the circled enclosure II part about the in-mold molded product using the label from which a layer structure differs. FIG. 3A is an enlarged cross-sectional view of a circled portion III in FIG. 2, and FIG. 3B is an enlarged cross-sectional view of the in-mold molded product having different label fixing depths in the circled III portion. The partially abbreviated top view which shows the embossing given to the surface of a nonwoven fabric. (A)-(c) is a partially abbreviate | omitted sectional drawing which shows the nonwoven fabric in which various embossing was given. A partially omitted cross-sectional view showing a label before in-mold molding. The perspective view containing the partial cross section which shows the fiber (filament) of a heat weldable nonwoven fabric. The expanded sectional view which shows other embodiment of an in-mold molded product.

  DESCRIPTION OF SYMBOLS 1 ... In-mold molded article, 2 ... Resin molded object, 3 ... Label, 31 ... Thermal-adhesion layer, 32 ... Underlayer, 33 ... Nonwoven fabric layer, 34 ... Film layer

Claims (4)

An in-mold molded product in which a label is fixed to a resin molded body by in-mold molding,
The label is composed of a laminate in which an embossed nonwoven fabric layer and a film layer are laminated at least, and the label is fixed to the resin molded body by in-mold molding with the film layer facing outside. In-mold molded product characterized by   The in-mold molded product according to claim 1, wherein the film layer includes a thermoplastic resin film having a thickness of 5 to 50 μm and not substantially thermally contracted.   The in-mold molded product according to claim 1, wherein the film layer includes a polypropylene film.   A label in which at least an embossed nonwoven fabric layer and a film layer are laminated is held in the mold with the film layer facing the inner surface of the mold, and the molten resin is brought into contact with the label by in-mold molding. A method for producing an in-mold molded product.

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