JP2010195402A - Tube container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tube container in which a foreign matter can hardly adhere to the edges of a label and the label can hardly float from a tube body. <P>SOLUTION: The tube container 1 includes: the tube body 3 that has a discharging portion 31 at one end of a hollow cylindrical portion 2 and a heat-welded closed portion 32 at the other end of the cylindrical portion 2; a label 5 pasted around the tube body 3. The label 5 is attached to the cylindrical portion of the tube body via a hot-melt type adhesive containing olefin elastomer. The MFR of the hot-melt type adhesive is 3-50 g/10min. Preferably, the lower end 5d of the label 5 is disposed higher than the heat-welded closed portion 32 of the tube body 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a tube container having a label attached to a tube body.

Conventionally, flexible tube containers are filled with fluid fillers such as toothpaste, facial cleansing products, cosmetics, and gel pharmaceuticals.
Designs such as letters and designs are displayed on the surface of the tube container. As a display method of this design, it is known to perform design printing or foil transfer (so-called hot stamping) directly on the surface of the tube container. However, when this method is used, a special coating layer must be formed on the surface of the tube container in order to stably attach the printing ink and foil. Further, when this method is used, the ink and foil are easily peeled off.
In order to solve such a problem, the following two methods are known.

The first method is a method in which a heat-shrinkable cylindrical label displaying a design is attached to a tube body by heat-shrinking (see Patent Document 1).
The second method is a method in which a label displaying a design is wrapped around a tube main body via a pressure-sensitive adhesive (see Patent Document 2).

Japanese Patent No. 3310343 Japanese Patent No. 3510350

  However, in the tube container obtained by the first method, the cylindrical label and the tube main body are not integrated. For this reason, there is a problem that foreign matters such as water and dust are likely to enter between the tube main body and the cylindrical label. Furthermore, while using the tube container, wrinkles occur in the cylindrical label, so that the appearance of the tube container is also deteriorated.

On the other hand, in the tube container obtained by the second method, the winding label and the tube main body are integrated via a pressure-sensitive adhesive.
However, in this tube container, foreign matters such as dust are likely to adhere to the pressure-sensitive adhesive coming out from the edge of the wound label, and the appearance of the tube container may be impaired.
Furthermore, the label coated with the pressure-sensitive adhesive is usually provisionally pasted on the release paper. Since the surface of the release paper has fine unevenness, the surface of the pressure-sensitive adhesive layer becomes uneven. Due to the unevenness, the transparency of the pressure-sensitive adhesive layer is lowered, so that the appearance of the tube container to which the winding label is attached may be impaired.

In addition, since the pressure-sensitive adhesive is inferior in water resistance, the label may peel off when the tube container gets wet.
In general, the tube body is made of polyolefin such as polypropylene. Since the surface of the polyolefin tube main body is excellent in chemical stability, the adhesion between the pressure sensitive adhesive and the tube main body is not always good. For this reason, there exists a possibility that a winding label may float from a tube main body while using a tube container.

A first object of the present invention is to provide a tube container having a good appearance in which foreign matters are hardly attached to the edge of the label and the label is difficult to lift from the tube main body.
The second object of the present invention is to provide a tube container having a good appearance in which foreign matter hardly adheres to the edge of the label, is excellent in water resistance, and the label is difficult to lift from the tube body.

  The tube container of the present invention includes a tube main body in which a pouring part is formed at one end of a hollow body and a heat-welded blocking part is formed at the other end of the body, and the body of the tube main body. A label wound around and pasted, and the label is pasted on the body of the tube body through a hot melt adhesive containing an olefin elastomer, and the hot melt adhesive MFR is 3-50 g / 10min.

In the tube container of the present invention, a label is bonded to the tube body via a hot melt adhesive. Since the hot-melt adhesive does not show adhesiveness at room temperature, the tube container has no possibility of foreign matter adhering to the edge of the label. Further, since the label provided with the hot melt adhesive does not need to be temporarily attached to the release paper, the surface smoothness of the hot melt adhesive layer can be maintained. For this reason, the label excellent in transparency can be comprised and the external appearance of a tube container also becomes favorable.
Furthermore, a hot melt adhesive containing an olefin-based elastomer and having an MFR of 3 to 50 g / 10 min is less likely to cause cohesive failure after bonding and can adhere well to the surface of the tube body. For this reason, even if a tube main body deform | transforms at the time of the said tube container, a label becomes difficult to peel from a tube main body.

In a preferable tube container of the present invention, the hot melt adhesive contains an ethylene copolymer and an olefin elastomer, and the mass ratio of the ethylene copolymer to the olefin elastomer is 30:70 to 70:30. is there.
By using such a hot-melt adhesive, the label is difficult to peel off even when water adheres. Therefore, the label adheres to the tube main body before and after the water adheres, and a tube container excellent in water resistance can be provided. Even when such a tube container is used in a place around water, there is no possibility that the label is peeled off.

In another preferable tube container of the present invention, the ethylene copolymer is an ethylene-vinyl acetate copolymer, and the olefin elastomer is more contained than the ethylene copolymer.
By using such a hot-melt adhesive, the label strongly adheres to the tube main body before and after the water adheres, and a tube container having extremely excellent water resistance can be provided.

In another preferred tube container of the present invention, the lower end portion of the label is located above the heat-welded closed portion of the tube body.
The heat welding blockage part of the tube body is formed by pressing the other end part of the tube body while heating. If the label overlaps with the heat-welded closed portion, the hot melt adhesive may be pushed out from the edge of the label when the heat-welded closed portion is formed.
In the other preferable tube container, since the lower end portion of the label is located above the heat-welded closed portion, the hot melt adhesive is not pushed out at the lower end portion of the label and does not decrease. Therefore, in the other preferable tube container, the lower end portion of the label is hardly peeled off from the tube main body.

The tube container of the present invention has a good appearance because it is difficult for foreign matter to adhere to the edge of the label and the label is difficult to peel off from the tube body.
In addition, the preferable tube container of the present invention can be suitably used particularly in a place around water because the adhesive is hardly peeled off even when the label gets wet.

The front view of the tube container which concerns on one embodiment. FIG. 2 is a partially omitted end view taken along line II-II in FIG. 1. FIG. 3 is a partially omitted end view taken along line III-III in FIG. 1. The top view of the label which concerns on one embodiment. Sectional drawing cut | disconnected by the VV line | wire of FIG. Sectional drawing of the label which concerns on other embodiment.

  1 to 3, a tube container 1 includes a tube main body 3 having a hollow body 2 and an extraction portion 31, a cap 4 attached to the extraction portion 31 of the tube main body 3, and the tube main body 3. And a label 5 which is wound around the body portion 2 and attached via a hot melt adhesive.

  The body 2 of the tube body 3 is formed in a flexible cylindrical hollow shape. An extraction portion 31 is formed at one end in the longitudinal direction of the body portion 2. The extraction part 31 is a cylindrical part (a cylindrical shape having a smaller diameter than the body part 2) projecting from one end of the body part 2, and a male thread part is formed on the outer peripheral surface thereof (male thread). (Not shown). The cap 4 can be detachably attached to the male thread portion of the extraction portion 31.

  A heat-welded closed portion 32 is formed at the other longitudinal end of the body portion 2. This heat-welding blockage portion 32 is a portion in which the other end portion of the body portion 2 is flattened and the inner surfaces thereof are heat-welded. The other end portion of the body portion 2 is closed by the heat welding closing portion 32. In addition, in FIG. 1, the heat-welding obstruction | occlusion part 32 is represented by the hatching.

The trunk portion 2 and the extraction portion 31 of the tube body 3 are formed of a molded product of a synthetic resin such as a high-density polyethylene or a polyolefin such as polypropylene. The tube body 3 formed of an olefin resin is preferable because it is excellent in flexibility and squeeze properties.
In addition, the trunk | drum 2 and the extraction | pouring part 31 are formed integrally. The body portion 2 is formed with a thin resin thickness in order to be flexible, and the extraction portion 31 is formed with a thick resin thickness in order to make it relatively hard.

As shown in FIG. 4, the label 5 is formed in a substantially rectangular shape in plan view that can be wound around the body portion 2 of the tube body 3.
The label 5 has a base material 51, a design layer 52, and a hot melt adhesive layer 53 provided on the innermost surface of the label 5.

In one embodiment, the design layer 52 is provided on the inner surface of the substrate 51 as shown in FIG. In this case, the hot melt adhesive layer 53 is provided on the inner surface of the design layer 52.
In another embodiment, the design layer 52 is provided on the outer surface of the substrate 51 as shown in FIG. In this case, the hot-melt adhesive layer 53 is provided on the inner surface of the substrate 51. In the case of this other embodiment, it is preferable to provide an overcoat layer 54 on the outer surface of the design layer 52 in order to protect the design layer 52.
Note that the label 5 is not limited to the above-described layer configuration as long as the hot-melt adhesive layer 53 is provided on the innermost surface of the label 5, and can be changed to various modes.

The base material 51 of the label 5 is not particularly limited, and examples thereof include sheets such as synthetic resin sheets, paper, synthetic paper, metal vapor deposition sheets, and foamed resin sheets. The substrate 51 may be a laminated sheet in which two or more of the sheets are laminated.
Preferably, the base material 51 is a synthetic resin sheet. The synthetic resin sheet may be a non-heat-shrinkable sheet (for example, a biaxially stretched sheet) or a heat-shrinkable sheet. Since the label 5 is difficult to shrink due to heat applied when activating the hot melt adhesive, the synthetic resin sheet is preferably a non-heat-shrinkable sheet.

  The material of the synthetic resin sheet or the like is not particularly limited, and examples thereof include polyolefins such as polyethylene, polypropylene and cyclic olefins, polyesters such as polyethylene terephthalate, polyvinyl chlorides, polyamides and polystyrenes. Among these, the base material 51 is preferably a polyolefin or polyvinyl chloride sheet such as polyethylene or polypropylene. The substrate 51 having the preferred sheet is relatively flexible and easily stretched. For this reason, the label 5 easily follows the deformation of the tube main body 3, and the label 5 is difficult to peel off from the tube main body 3.

  The substrate 51 may be either transparent or opaque, but is preferably excellent in transparency. The substrate 51 excellent in transparency preferably has a total light transmittance of 80% or more, more preferably 90% or more. However, the total light transmittance refers to a value measured by a measuring method in accordance with JIS K7105 (plastic optical property test method).

The substrate 51 having excellent transparency is preferably colorless, but may be colored within a range that does not impair the transparency.
The thickness of the substrate 51 is not particularly limited, but is preferably 10 μm to 50 μm. Since the base material 51 having such a thickness range has a degree of flexibility and waist, the filler in the tube container 1 can be squeezed out satisfactorily.

  The design layer 52 is formed by a conventionally known printing method. Examples of the printing method include a gravure printing method, a flexographic printing method, a letterpress printing method, and an offset printing method. The design layer 52 may be formed by a foil transfer method (hot stamp or the like).

The hot-melt adhesive layer 53 is formed by applying a hot-melt adhesive on the substrate 51 or the like.
The thickness of the hot-melt adhesive layer 53 is not particularly limited. However, when the thickness is too thin, the label 5 does not sufficiently adhere to the tube body 3, and when the thickness is too thick, the step between the label 5 and the tube body 3. Becomes larger. Considering these, the thickness of the hot melt adhesive layer 53 is preferably 10 μm to 30 μm.
In addition to hot melt adhesives, there are thermal adhesives such as delayed tack thermal adhesives and emulsion thermal adhesives that do not contain solid plasticizers. Delayed tack thermal adhesives and emulsion thermal adhesives are Since it cannot be applied thickly, it is not possible to obtain sufficient adhesive strength for bonding the label to the tube body. In this regard, if a hot-melt adhesive is used, a relatively thick layer can be formed, so that the label 5 can be adhered to the tube body 3 with sufficient adhesive strength.

  A hot-melt adhesive is an adhesive that does not exhibit adhesiveness at room temperature and has a property that can be bonded by heating. The hot melt adhesive is an adhesive that can be applied by heating and melting. The hot melt adhesive can be applied using an apparatus such as a hot melt coater or an extrusion laminator.

If the MFR (melt flow rate) of the hot melt adhesive is too low, the adhesiveness between the tube body 3 and the adhesive is lowered, and if too high, the adhesive has high fluidity and may cause cohesive failure. In addition, since it is applied with a hot melt coater, the transparency of the adhesive may be impaired.
Therefore, the MFR of the hot melt adhesive is 3 g / 10 min to 50 g / 10 min, preferably 3 g / 10 min to 40 g / 10 min, and more preferably 13 g / 10 min to 40 g / 30 min. By using such a hot melt type adhesive in the MFR range, after bonding, the adhesive itself hardly causes cohesive failure, and the label 5 does not easily peel off from the tube body 3.
The MFR is a value measured according to JIS K 7210 (test temperature 190 ° C., load 2.16 kg).

The hot-melt adhesive includes, for example, a base polymer and a tackifier, and includes various additives such as a wax, a stabilizer, and a modifier as necessary.
Examples of the base polymer include ethylene-based copolymers such as ethylene-vinyl acetate copolymers, ethylene- (meth) acrylic acid ester copolymers, ethylene-acrylic acid copolymers, ethylene-methacrylic acid copolymers. Copolymer; olefin polymer; styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene-butylene-styrene-block copolymer (SEBS), Examples thereof include styrene-based elastomers such as styrene-ethylene-propylene-styrene block copolymer (SEPS), olefin-based elastomers such as ethylene-α-olefin, ester-based elastomers, and thermoplastic elastomers such as amide-based elastomers. The base polymer can be used alone or in combination of two or more.

The hot melt adhesive of the present invention includes an olefin elastomer such as ethylene-α olefin as a base polymer. Since the olefin-based elastomer is contained in the hot melt adhesive, the label is difficult to peel off when the label 5 is bonded to the tube body 3 through the hot melt adhesive. In particular, when the tube body 3 is formed of a polyolefin-based synthetic resin, the use of the hot-melt adhesive increases the adhesive strength to the surface of the tube body 3 and makes the label 5 more difficult to peel off.
Furthermore, the hot melt adhesive preferably contains an ethylene copolymer and an olefin elastomer as a base polymer, and more preferably contains an ethylene-vinyl acetate copolymer and an olefin elastomer. Such hot-melt adhesives can be bonded at a relatively low temperature (130 ° C. or lower).

When the base polymer includes an ethylene copolymer (preferably an ethylene-vinyl acetate copolymer) and an olefin elastomer, the content ratio is not particularly limited. Preferably, the mass ratio of the ethylene copolymer to the olefin elastomer is 30:70 to 70:30, more preferably 30:70 to 60:40, and particularly preferably 33:67 to 50. : 50. The hot melt adhesive in which the ethylene copolymer and the olefin elastomer are within the above mass ratio has excellent adhesive strength before and after the water adheres, and the label 5 peels off from the tube body 3. It becomes difficult.
Further, when the base polymer contains an ethylene copolymer (preferably an ethylene-vinyl acetate copolymer) and an olefin elastomer, it is preferable that the olefin elastomer is contained more than the ethylene copolymer. . When the blending amount of the olefin elastomer is relatively low, the water resistance decreases.

  Examples of the tackifier (tackifier) include rosin resins such as rosin, polymerized rosin, hydrogenated rosin and derivatives thereof, resin acid dimer; terpene resin, aromatic modified terpene resin, hydrogenated terpene resin, terpene Examples include terpene resins such as phenol resins; petroleum resins such as aliphatic resins, aromatic resins, and alicyclic resins; phenol resins and the like. The tackifier can be used alone or in combination of two or more.

The label 5 is wound in the circumferential direction of the body portion 2 of the tube main body 3 and is stuck via a hot melt adhesive layer 53.
The label 5 may be wound around the entire circumferential direction of the body part 2 or may be wound around a part of the circumferential direction of the body part 2. Preferably, the label 5 is wound around the whole circumferential direction of the trunk | drum 2, as shown in FIG.
When the label 5 is wound around the entire circumferential direction of the body portion 2, the side edge of the winding start end portion 5a of the label 5 may be in contact with the side edge of the winding end portion 5b. The winding start end portion 5a and the winding end portion 5b may be overlapped.
Preferably, as shown in FIG. 2, the label 5 is wound around the body 2 so that the winding start end portion 5a and the winding end portion 5b overlap (for example, on the winding start end portion 5a of the label 5). The winding end portion 5b is adhered).

The width of the overlapping portion of the winding start end portion 5a and the winding end portion 5b (the length of the overlapping portion in the circumferential direction of the body portion 2) is not particularly limited, but is preferably 1 mm to 5 mm.
Thus, by providing an overlapping part, it can prevent that the label 5 wound around the tube main body 3 peels.
The label 5 bonded through the hot melt adhesive can be bonded to the surface of the tube body 3 with an adhesive strength of 3 N / 15 mm or more.
On the other hand, the adhesive strength at the overlapping surface of the winding start end portion 5a and the winding end portion 5b is larger than the adhesive strength of the label 5 to the surface of the tube body 3. This is because the polyolefin tube body 3 is excellent in surface chemical stability. If the said hot-melt-type adhesive agent is used, the said overlapping surface can be adhere | attached with the adhesive strength of 5 N / 15mm or more.
Therefore, the end portion of the label 5 is difficult to bend and the label 5 can be prevented from being peeled off from the tube body 3.
However, the said adhesive strength can be measured according to JISZ0237 like the following Example.

  Moreover, it is preferable that the upper end part 5c of the said label 5 is located slightly lower than the shoulder part 33 of the tube main body 3, as shown in FIG. This is because if the upper end portion 5 c of the label 5 exceeds the shoulder portion 33 of the tube body 3, wrinkles occur at the upper end portion 5 c of the label 5.

On the other hand, the lower end portion 5 d of the label 5 may be positioned so as to overlap the heat welding blockage portion 32 of the tube body 3 or may be positioned above the heat welding blockage portion 32.
Preferably, as shown in FIGS. 1 and 3, the label 5 is wound around the body portion 2 so that the lower end portion 5 d thereof is located above the heat welding closing portion 32.

Here, the manufacturing procedure of the tube container 1 will be briefly described.
The hot melt adhesive layer 53 of the label 5 is heated to about 110 ° C. to 140 ° C. to activate the hot melt adhesive (gelation is performed so as to produce adhesiveness). Next, the label 5 is wound around the body 2 of the tube main body 3 with the other end opened, and is bonded via a hot melt adhesive. At this time, the upper end portion 5c of the label 5 is disposed below the shoulder portion 33 of the tube main body 3, the lower end portion 5d of the label 5 is disposed above the other end portion of the tube main body 3, and the label 5 The label 5 is wound around the body portion 2 by overlapping the winding end portion 5b with a predetermined width on the winding start end portion 5a.
Finally, the opening of the other end portion of the tube body 3 is closed by pressing the other end portion of the tube body 3 in a flat shape using a thermal iron heated to 170 ° C. to 190 ° C. (ie, heat The weld blockage 32 is formed).

When the lower end portion 5d of the label 5 is overlapped with the heat-welding blockage portion 32 formed as described above, the hot melt adhesive is pressed by the pressing of the thermal iron for forming the heat-welding blockage portion 32. The label 5 may be pushed out from the edge of the lower end 5d.
In this regard, according to the above preferred embodiment in which the lower end portion 5d of the label 5 is positioned above the heat-welding closed portion 32, the hot melt adhesive is not pushed out and reduced at the lower end portion 5d of the label 5. . For this reason, the tube container 1 in which the lower end portion 5d of the label 5 is difficult to peel off from the tube body can be provided.

As described above, the hot melt adhesive does not exhibit adhesiveness at room temperature. For this reason, the tube container 1 according to the present invention has no possibility of foreign matter adhering to the edge of the label 5. In addition, a label provided with a hot-melt adhesive that does not exhibit adhesiveness at room temperature does not need to be temporarily attached to a release paper. For this reason, the surface of the hot-melt adhesive layer 53 can be made smooth, and a label having excellent transparency can be configured.
Furthermore, since the hot melt adhesive can adhere well to the surface of the tube main body 3, the label 5 of the tube container 1 is difficult to lift from the tube main body 5.
Therefore, according to this invention, the tube container 1 which has a favorable external appearance can be provided.

  Examples of the tube container of the present invention will be given below. However, the tube container of the present invention is not limited to the following examples.

[Example 1]
30 parts by mass of an ethylene-vinyl acetate copolymer (manufactured by Tosoh Corporation, trade name: Ultrasen 750) and 45 parts by mass of an olefin elastomer (manufactured by Dow, trade name: ENGAGE 8137). -25 parts by mass of a tackifier (trade name: Clearon P115, manufactured by Yasuhara Chemical Co., Ltd.) is added to a base polymer composed of a mixture of octene copolymer), and a small amount of polyethylene wax, stearamide, etc. These additives were melt blended and cut into pellets in water to produce hot melt adhesive pellets.
The MFR (measured according to JIS K 7210, test temperature 190 ° C., load 2.16 kg) of the hot melt adhesive pellet was 16 g / 10 min.

UV curable ink (trade name: 500 manufactured by T & K TOKA) on the inner surface (corona treatment is applied to this surface) of a 30 μm OPP film (trade name: Pyrene P2161 manufactured by Toyobo Co., Ltd.) Series). On the printed surface, an extrusion laminator was used to melt and extrude the hot melt adhesive pellets to form a hot melt adhesive layer having a thickness of 25 μm on the film. This film was cut into a width of 125 mm to produce a continuous label.
The label continuum was cut into a length of 125 mm using a labeler to obtain one label. This label is affixed to the tube body (wall thickness 480 μm, made of high-density polyethylene, surface tension 48 dyne / cm) that has been corona-treated in the labeler so that the winding end portion overlaps the winding start end portion. I attached. The labeling conditions were as follows: the pressing pressure was 0.1 MPa, the adhesive heating temperature was 130 ° C., and the mounting speed was 60 lines / min.
In this way, a plurality of tube containers were produced.

About the tube container obtained as mentioned above, the adhesive strength of the label was measured (measured according to JIS Z 0237. 90 ° peeling, peeling speed 300 mm / min).
As a result, the adhesive strength of the adhesive portion (over the OPP film surfaces) in the overlap was 9.47 N / 15 mm, and the adhesive strength of the label adhesive portion to the tube body was 6.95 N / 15 mm.
Moreover, after immersing the obtained tube container in normal temperature water (25 degreeC) for 24 hours, when the adhesive strength was measured similarly, the adhesive strength after the water immersion of the adhesion part in an overlap is 8.87 N / 15mm, The adhesive strength after immersion of the label adhesion part to the tube body was 6.27 N / 15 mm.

Moreover, about the said tube container, the squeeze property was evaluated with the following method.
For squeeze resistance, use a tube container that has not been subjected to the above-mentioned adhesive strength test, and after squeezing the center of the tube container by hand 50 times from the outside, visually observe the state of the label, evaluated. The results are shown in the table. In the table, “○” indicates “no label float or wrinkle”, “△” indicates “a float with a width of less than 5 mm occurs at the end of the label”, and “×” indicates “the end of the label. Means a float with a width of 5 mm or more.

[Example 2]
Hot-melt adhesive pellets were produced in the same manner as in Example 1 except that 26 parts by mass of the ethylene-vinyl acetate copolymer and 49 parts by mass of the olefin elastomer were respectively replaced.
The MFR (testing method is the same as in Example 1) of the hot melt adhesive pellet according to Example 2 was 14 g / 10 min.

Next, using the hot melt adhesive pellet according to Example 2, a tube container was prepared in the same manner as in Example 1, and the adhesive strength, the adhesive strength after immersion, and the squeeze property were measured.
The results are shown in Table 1.

[Example 3]
Hot melt adhesive pellets were produced in the same manner as in Example 1, except that the ethylene-vinyl acetate copolymer was replaced with 40 parts by mass and the olefin elastomer was replaced with 35 parts by mass.
The MFR (the test method was the same as in Example 1) of the hot melt adhesive pellet according to Example 3 was 21 g / 10 min.

Next, using the hot melt adhesive pellet according to Example 3, a tube container was prepared in the same manner as in Example 1, and the adhesive strength, the adhesive strength after immersion, and the squeeze property were measured.
The results are shown in Table 1.

[Example 4]
Hot melt adhesive pellets were produced in the same manner as in Example 1 except that the ethylene-vinyl acetate copolymer was replaced with 49 parts by mass and the olefin elastomer was replaced with 26 parts by mass.
The MFR (test method is the same as in Example 1) of the hot-melt adhesive pellet according to Example 4 was 25 g / 10 min.

Next, using the hot melt adhesive pellet according to Example 4, a tube container was prepared in the same manner as in Example 1, and the adhesive strength, the adhesive strength after immersion, and the squeeze property were measured.
The results are shown in Table 1.

[Example 5]
Hot-melt adhesive pellets were produced in the same manner as in Example 1, except that the ethylene-vinyl acetate copolymer was replaced with 22 parts by mass and the olefin-based elastomer was replaced with 53 parts by mass.
The MFR (testing method is the same as in Example 1) of the hot melt adhesive pellet according to Example 5 was 12 g / 10 min.

Next, using the hot melt adhesive pellet according to Example 5, a tube container was produced in the same manner as in Example 1, and the adhesive strength, the adhesive strength after immersion, and the squeeze property were measured.
The results are shown in Table 2.

[Example 6]
Hot melt adhesive pellets were produced in the same manner as in Example 1 except that 53 parts by mass of the ethylene-vinyl acetate copolymer and 22 parts by mass of the olefin elastomer were respectively replaced.
The MFR (the test method was the same as in Example 1) of the hot melt adhesive pellet according to Example 6 was 34 g / 10 min.

Next, using the hot melt adhesive pellet according to Example 6, a tube container was produced in the same manner as in Example 1, and the adhesive strength, the adhesive strength after immersion, and the squeeze property were measured.
The results are shown in Table 2.

[Example 7]
Hot-melt adhesive pellets in the same manner as in Example 1 except that the ethylene-vinyl acetate copolymer was replaced with an ethylene-ethyl acrylate copolymer (trade name: NUC6570, manufactured by Nippon Unicar Co., Ltd.). Was made.
The MFR (test method is the same as in Example 1) of the hot-melt adhesive pellet according to Example 7 was 14 g / 10 min.

Next, using the hot-melt adhesive pellet according to Example 7, a tube container was produced in the same manner as in Example 1, and the adhesive strength, the adhesive strength after immersion, and the squeeze property were measured.
The results are shown in Table 2.

[Comparative example]
An ethylene-vinyl acetate copolymer (manufactured by Tosoh Corporation, trade name: Ultrasen 750) is an ethylene-vinyl acetate copolymer (manufactured by Tosoh Corporation, trade name: Ultrasen 727. The MFR of this copolymer is A hot-melt adhesive pellet was produced in the same manner as in Example 1 except that it was changed to about 2200).
The MFR (testing method is the same as in Example 1) of the hot melt adhesive pellet according to this comparative example was 57 g / 10 min.

Next, using the hot melt adhesive pellet according to the comparative example, a tube container was prepared in the same manner as in Example 1, and the adhesive strength, the adhesive strength after immersion, and the squeeze property were measured.
The results are shown in Table 2.

From the above results, in the comparative example, the adhesive strength of the adhesive portion in the overlap was 3.99, and the adhesive strength of the label adhesive portion to the tube body was 2.97. Therefore, the comparative example was very inferior to Examples 1-7 about the adhesive strength before water adhered. This cause is presumed to be due to the MFR of the hot-melt adhesive of the comparative example exceeding 50.
In addition, Examples 5 and 6 have an adhesive strength before water adhering of 3 or more and good anti-squeeze properties, but the adhesive strength after water immersion is inferior to that of Examples 1-4 and 7. Yes. This is because the mass ratio of the ethylene copolymer and the olefin elastomer of Example 5 is 29:71, and the mass ratio of the ethylene copolymer and the olefin elastomer of Example 6 is 71:29. Presumed to be due.
Furthermore, Examples 1 and 2 showed very high adhesive strength both before and after the water adhered.

  The tube container of the present invention can be used as a container for filling fluid fillers such as toothpaste, facial cleansers, cosmetics, and gel-like pharmaceuticals.

  DESCRIPTION OF SYMBOLS 1 ... Tube container, 2 ... trunk | drum, 3 ... tube main body, 31 ... pouring part, 32 ... heat welding obstruction | occlusion part, 4 ... cap, 5 ... label, 5a ... winding start end part of label, 5b ... winding of label End portion with a mark, 5c ... upper end portion of the label, 5d ... lower end portion of the label, 51 ... base material, 52 ... design layer, 53 ... hot melt adhesive layer

Claims (4)

A tube body in which a pour-out portion is formed at one end of a hollow body and a heat-welded block is formed at the other end of the body, and a label wound around and pasted on the body of the tube body In a tube container having
The label is attached to the body of the tube body via a hot melt adhesive containing an olefin-based elastomer,
A tube container, wherein the hot melt adhesive has an MFR of 3 to 50 g / 10 min.   The tube according to claim 1, wherein the hot-melt adhesive includes an ethylene copolymer and an olefin elastomer, and a mass ratio of the ethylene copolymer to the olefin elastomer is 30:70 to 70:30. container.   The tube container according to claim 2, wherein the ethylene copolymer is an ethylene-vinyl acetate copolymer, and the olefin elastomer is contained in a larger amount than the ethylene copolymer.   The tube container in any one of Claims 1-3 in which the lower end part of the said label is located above the heat-welding obstruction | occlusion part of the said tube main body.

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