JP2019026339A - Blow molding container with label - Google Patents

Abstract

To provide a blow molding container with a label which can separate a label material easily from a container body.SOLUTION: A blow molding container 1 with a label where a cylindrical label material 20 which is attached to an outer surface of a preform 30 and is extended with the preform 30 by blow molding contacts peelably to the outer surface of a drum 13 of a container body 10, characterized in that the label material 20 has a label main portion 21 which is made of synthetic resin material, a breakage portion 22 which is formed in a band-like shape extended from one end to the other end of the axis direction of the label material 20, made of a synthetic resin material that compatibility to the synthetic resin material for forming the label main portion 21 is low, connects separably to the label main portion 21 between both ends of the circumferential direction of the label main portion 21.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a blow-molded container formed by blow-molding a preform, and more particularly to a blow-molded container with a label provided with a cylindrical label material.

  A blow molded container formed by blow molding a preform formed of a synthetic resin material such as polyethylene terephthalate (PET) or polypropylene (PP) has advantages such as toughness and light weight. It is widely used as a container for storing soft drinks, water, beer, sake, soy sauce, and the like as contents.

  Such a blow molded container is generally provided with a label material printed with a product name, a design, or the like on a body portion for the purpose of decoration. As label materials, shrink labels that are heat-shrinked and attached to the body, etc., adhesive labels that are attached to the body using an adhesive, etc. are known, but in recent years the label material has been integrated into the container body. In order to enhance the aesthetic appearance of the container, it is known that the label material is stretched together with the preform by blow molding and is in close contact with the outer peripheral surface of the container main body.

  For example, Patent Document 1 discloses that a cylindrical label material can be peeled from a body part by blow-molding a label material fixed to a body part of a preform by in-mold molding and stretching the label material together with the preform. A blow molded container with a label, which is configured to be in close contact with, is described.

Japanese Patent No. 4636373

  In a blow molded container equipped with a label material, the label material and the container are separated from the container body when the contents are emptied and disposed of in order to recycle (reuse) the material. It is necessary to separate and collect the main body.

  However, in the conventional blow molded container with a label, the label material is in close contact with the body portion of the container main body, and thus is difficult to peel off from the container main body. Also, when the label material formed in a cylindrical shape is peeled off Since there is no portion that can be picked with a finger, there is a problem that it is difficult to separate the label material from the container body and separate it from the container body.

  An object of the present invention is to provide a blow molded container with a label that can easily separate a label material from a container body.

  The blow molded container with a label of the present invention is a blow molded container with a label in which a cylindrical label material attached to a preform and stretched by blow molding together with the preform is in close contact with the outer peripheral surface of the container main body. The label material is formed from a label main part formed of a synthetic resin material and a synthetic resin material having low compatibility with the synthetic resin material forming the label main part from one end in the axial direction of the label material. And a rupture portion that is formed in a strip shape extending to the end and is detachably joined to the label main body between both ends in the circumferential direction of the label main body.

  The blow molded container with a label according to the present invention has the above-described configuration, wherein the label main body portion is formed of a first synthetic resin material that is a polyolefin resin or a polyester resin, and the fracture portion is the first synthetic resin material 30. -50% by weight, 3-20% by weight of a second synthetic resin material that is an ethylene-vinyl alcohol copolymer resin or nylon that cannot be bonded to the first synthetic resin material, the first synthetic resin material, and the second It is preferably formed of a synthetic resin material containing 30 to 50% by weight of a third synthetic resin material that is an adhesive polymer for allowing the synthetic resin material to adhere.

  In the blow molded container with a label according to the present invention, in the above configuration, the fracture portion preferably further includes 5 to 20% by weight of a fourth synthetic resin material that is an ethylene-methacrylic acid copolymer resin.

  ADVANTAGE OF THE INVENTION According to this invention, the blow molding container with a label which can isolate | separate a label material from a container main body easily can be provided.

It is a front view which shows a blow molded container with a label which is one embodiment of the present invention with a part thereof cut away. It is sectional drawing of the principal part of the blow molding container with a label shown in FIG. FIG. 2 is a half sectional view of a preform for producing the labeled blow-molded container shown in FIG. 1. It is explanatory drawing which shows the procedure which isolate | separates a label material from the container main body shown in FIG.

  Hereinafter, the present invention will be described in more detail with reference to the drawings.

  A blow molded container 1 with a label which is an embodiment of the present invention shown in FIG. 1 is used for accommodating a soft drink such as a carbonated drink, and has a container body 10 and a label material 20. ing.

  The container body 10 is a synthetic resin blow-molded product formed by blow-molding a synthetic resin preform 30 shown in FIG. As shown in FIG. 1, the container body 10 includes a cylindrical mouth portion 11, a tapered shoulder portion 12 continuous with the lower end of the mouth portion 11, a cylindrical trunk portion 13 and a trunk portion 13 continuous with the lower end of the shoulder portion 12. The bottom part 14 which obstruct | occludes the lower end of this has a bottle shape as a whole. A male screw 11a is integrally provided on the outer peripheral surface of the mouth portion 11, and the mouth portion 11 can be closed by the cap by screwing a cap (not shown) to the male screw 11a.

  As shown in FIG. 3, the preform 30 is an injection-molded product formed by injection molding a synthetic resin material, and has a mouth portion 31 having the same shape as the mouth portion 11 and a bottomed cylindrical shape (substantially a test tube). ) Main body 32. The mouth portion 31 is not deformed by blow molding and becomes the mouth portion 11 of the container body 10 as it is.

  The main body 32 is heated to a predetermined temperature that develops stretchability. In this state, the preform 30 is set in a blow molding die, and the inside of the main body 32 through the mouth portion 31 is, for example, pressurized air or By supplying a pressurized medium such as a pressurized liquid, the preform 30 is blow-molded and formed into a container body 10 having a predetermined shape shown in FIG.

  As a synthetic resin material for forming the container body 10 or the preform 30, for example, polyethylene terephthalate (PET), polypropylene (PP), polyethylene (PE), polyethylene naphthalate (PEN), or the like can be used as long as it is suitable for blow molding. Various synthetic resin materials such as polyethylene furanoate (PEF) and polylactic acid (PLA) can be employed. In the present embodiment, the container body 10 or the preform 30 is made of polyethylene terephthalate.

  The preform 30 is not limited to an injection molded product formed by injection molding of a synthetic resin material, and may be a blow molded product formed by extrusion blow molding of a synthetic resin material.

  As shown in FIG. 1, the label material 20 is formed of a synthetic resin material into a cylindrical shape having a shorter axial dimension than the body portion 13 of the container body 10, and is provided on the body portion 13 of the container body 10. It is closely attached to the outer peripheral surface of the 13 so as to be peelable. The label material 20 can also provide light blocking properties by covering the entire bottle with a colored label member, and can also be decorated by printing, for example, product names or designs on the label surface. Can be.

  As shown in FIGS. 1 and 2, the label material 20 has a label main body portion 21 and a fracture portion 22. The label main body 21 is formed of a synthetic resin material in a sheet shape (film shape) having a C-shaped cross section that occupies most of the circumferential direction of the label material 20. The breaking portion 22 is formed in a strip shape extending from one end of the label material 20 in the axial direction to the other end, and is disposed between both ends in the circumferential direction of the label main body portion 21, and the label main body in one side portion 22 a. It is joined to one end in the circumferential direction of the portion 21 and joined to the other end in the circumferential direction of the label main body portion 21 in the other side portion 22b. The fracture portion 22 is formed of a synthetic resin material having low compatibility with the synthetic resin material forming the label main body portion 21, and both side portions 22 a and 22 b of the fracture portion 22 are joined to the label main body portion 21. However, it can be separated from the label main body 21 along the side portions 22a and 22b.

  In the case shown in the drawing, the fractured portion 22 has a trapezoidal shape with a wider circumferential width on the outer peripheral surface side than on the inner peripheral surface side. Due to the shape, the fracture portion 22 can be more easily separated from the label main body portion 21. In addition, the cross-sectional shape of the fracture | rupture part 22 is not restricted to above trapezoid shape, For example, other shapes, such as a rectangular shape, may be sufficient.

  Further, in the illustrated case, the breaking portion 22 extends straight from one end of the label material 20 in the axial direction toward the other end in parallel to the axial direction, but the breaking portion 22 extends in the axial direction of the label material 20. For example, it may extend in a direction inclined with respect to the axial direction of the label material 20.

  As shown in FIG. 3, the label material 20 is attached to the outer peripheral surface of the preform 30 and is blow-molded together with the preform 30 to be stretched into a shape corresponding to the outer peripheral surface of the body portion 13 of the container body 10. Thus, a thin sheet shape (film shape) is provided so as to come into close contact with the outer peripheral surface of the body portion 13 in a peelable manner. The label material 20 formed in this way is not integrally welded to the outer peripheral surface of the body portion 13, but is in a state where it is pressed onto the outer peripheral surface of the body portion 13 by the pressing force generated during blow molding. The outer peripheral surface of the body portion 13 is in close contact (crimped) so as to be peeled off.

  For example, the label material 20 is formed by co-extrusion molding a synthetic resin material that forms the label main body 21 and a synthetic resin material that forms the fracture portion 22, and corresponds to the sheet-like portion corresponding to the label main body 21 and the fracture portion 22. Forming a sheet material provided with a belt-shaped portion, covering the body portion 32 of the preform 30 with the sheet material rolled and fused, and performing blow molding after heating to a predetermined temperature, It can be provided so as to be in close contact with the outer peripheral surface of the body portion 13 of the container body 10 in a peelable manner.

  Alternatively, the label material 20 includes a synthetic resin material that forms the label main body 21 and a synthetic resin material that forms the fracture portion 22, having a portion corresponding to the label main body portion 21 and a portion corresponding to the fracture portion 22. The tube 30 is covered with the main body 32 of the preform 30 and heated to a predetermined temperature, and then blow-molded so that the outer peripheral surface of the body 13 of the container main body 10 is peelably adhered. Can be provided.

  Alternatively, the label material 20 is formed by coextruding a synthetic resin material forming the label main body portion 21 and a synthetic resin material forming the fracture portion 22 into a tube shape, and this is formed into the length of the main body portion 32 of the preform 30. The cut body is covered with the main body 32 of the preform 30 and heated to a predetermined temperature, and then blow-molded, so that it can be peelably adhered to the outer peripheral surface of the body 13 of the container main body 10. it can.

  In order to ensure that the label material 20 placed on the preform 30 is stretched together with the preform 30 during blow molding and can be peeled off from the outer peripheral surface of the container body 10 after stretching. As the synthetic resin material for forming the label main body portion 21 and the fracture portion 22 of the material 20, it is preferable to use a material having low compatibility with the synthetic resin material forming the preform 30.

  On the other hand, as the synthetic resin material for forming the label main body portion 21 and the fracture portion 22 of the label material 20, when using the same system having high compatibility with the synthetic resin material for forming the preform 30, Thus, the releasability of the label material 20 with respect to the outer peripheral surface of the container body 10 can be ensured by changing the copolymer component ratio to lower the compatibility or by blending different components to increase the releasability.

  In the blow molded container with a label 1 having such a configuration, the label material 20 is in close contact with the outer peripheral surface of the trunk portion 13 of the container main body 10 over the entire inner peripheral surface in any part of the label main body 21 and the breaking portion 22. Since it is in the form of a thin (crimped) sheet, the blow molded container 1 with a label can have a high aesthetic appearance in which the label material 20 is integrally provided on the body portion 13 of the container body 10.

  Further, after the use of the blow molded container 1 with a label, when separating the label material 20 from the container body 10 and collecting the label material 20 and the container body 10 for recycling of the material, the following procedure is performed. Thus, the label material 20 can be easily separated from the container body 10.

  That is, as shown in FIG. 4, by pulling and pulling one end of the breaking portion 22 with a finger, the breaking portion 22 can be easily peeled from the trunk portion 13 of the container body 10 from one end to the other end. Further, when the break portion 22 is peeled off from the body portion 13, a gap corresponding to the removal of the break portion 22 is generated between both ends in the circumferential direction of the label main body portion 21, so that the label material 20 is divided in the circumferential direction. The label main body 21 can be easily peeled off from the body portion 13 of the container body 10 by picking and pulling the corners of the divided portions with fingers.

  As described above, in the blow-molded container with label 1 according to the present embodiment, the label member 20 is provided with the breaking portion 22 that is detachably joined to the label main body portion 21, and the breaking portion 22 is peeled off from the container body 10. Thus, since the label material 20 is divided into right and left, the work of separating the label material 20 from the body portion 13 of the container body 10 can be facilitated.

  Further, since the label member 20 has a configuration in which the fracture portion 22 is joined to the label main body portion 21, the label member 20 itself is colored, the surface of the label member 20 is colored, characters, designs, etc. By decorating by printing, the joint part or boundary between the label main body part 21 and the breaking part 22 can be covered with the decoration part and cannot be visually recognized from the outside. Thus, the aesthetic appearance of the labeled blow-molded container 1 is provided while providing the breaking portion 22 for dividing the label material 20 as compared with the case where the tearing lines for breaking are formed by arranging the openings in the label material at intervals. Can be further enhanced. In this case, a display indicating the position of the end portion of the fracture portion 22 can be provided on the surface of the label material 20.

  In the labeled blow-molded container 1 having the above-described configuration, the label material 20 is formed of a first synthetic resin material in which the label main body portion 21 is a polyolefin-based resin or a polyester-based resin. 30% to 50% by weight of the first synthetic resin material, 3% to 20% by weight of the second synthetic resin material that is an ethylene / vinyl alcohol copolymer resin or nylon that cannot be bonded to the first synthetic resin material, and the first synthetic resin material It is preferably formed of a synthetic resin material containing 30 to 50% by weight of a third synthetic resin material, which is an adhesive polymer for allowing the second synthetic resin material to adhere. By adopting such a configuration, the strength of the joined portion between the label main body 21 and the fracture portion 22 is made moderate, and the fracture portion 22 is labeled main portion at the time of blow molding and after molding the blow molded container 1 with a label. When the rupture portion 22 is peeled off from the container main body 10 while being securely bonded to 21, the rupture portion 22 can be easily broken with respect to the label main body portion 21.

  In addition to the first synthetic resin material, the second synthetic resin material, and the third synthetic resin material, the fracture portion 22 further includes 5 to 20% by weight of a fourth synthetic resin material that is an ethylene-methacrylate copolymer resin. It can also be set as the structure containing. By adopting this configuration, the flexibility of the breaking portion 22 can be increased. Therefore, when the breaking portion 22 is peeled from the container body 10, the breaking portion 22 can be easily picked with a finger to peel the breaking portion 22. The work can be performed more easily.

  In the label material 20 having the above-described configuration, for example, the first synthetic resin material forming the label main body portion 21 is polypropylene resin (EX-6 manufactured by Nippon Polypro), and the synthetic resin material forming the fracture portion 22 is as described above. 45% by weight of the first synthetic resin material, 15% by weight of ethylene / vinyl alcohol copolymer resin (EP-E105 manufactured by Kuraray) as the second synthetic resin material, 35% by weight of Modic (P512V manufactured by Mitsubishi Chemical) as the third synthetic resin material, The fourth synthetic resin material may contain 5% by weight of ethylene-methacrylic acid copolymer resin (High Milan 1706 manufactured by Mitsui DuPont Polychemical).

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  For example, in the said embodiment, although the labeled blow molded container 1 shall be used for the use which accommodates soft drinks, such as carbonated drinks, it is not restricted to this, For example, other than water, beer, liquor, soy sauce, etc. You may apply this invention to the use which accommodates the contents of.

  Moreover, in the said embodiment, the label main-body part 21 is formed with the 1st synthetic resin material which is polyolefin resin or polyester resin, and the fracture | rupture part 22 is 30-50 weight% of 1st synthetic resin materials, It is possible to bond the first synthetic resin material and the second synthetic resin material to 3 to 20% by weight of the second synthetic resin material which is an ethylene / vinyl alcohol copolymer resin or nylon that cannot be bonded to the first synthetic resin material. However, the present invention is not limited to this, and the synthetic resin material for forming the label main body 21 is not limited thereto. If the synthetic resin material forming the break portion 22 is low in compatibility and the break portion 22 is detachably joined to the label main portion 21, the label main portion As the synthetic resin material forming the synthetic resin material and a breaking portion 22 to form a 1, it is possible to use various ones.

  Furthermore, in the said embodiment, although the label material 20 is provided so that only the trunk | drum 13 of the container main body 10 may be covered, not only this but the shoulder part 12 is covered with the trunk | drum 13, for example. Or so as to cover the bottom part 14 together with the body part 13, or so as to cover only the shoulder part 12, or so as to cover the entire container of the shoulder part 12, the body part 13 and the bottom part 14 etc. The range in which the label material 20 is provided can be variously changed.

  Furthermore, in the said embodiment, although only the one fracture | rupture part 22 is provided in the label material 20, you may make it provide not only this but the multiple fracture | rupture part 22. FIG. For example, when it is set as the structure which each provides the fracture | rupture part 22 on both sides which pinched | interposed the axial center of the container main body 10 of the label material 20, when separating the label material 20 from the container main body 10, it is easy to find the fracture | rupture part 22 Thus, the operation of separating the label material 20 from the container body 10 can be facilitated.

DESCRIPTION OF SYMBOLS 1 Blow molding container 10 with label Container body 11 Mouth part 12 Shoulder part 13 Body part 14 Bottom part 20 Label material 21 Label main part 22 Breaking part 22a Side part 22b Side part 30 Preform 31 Mouth part 32 Body part

Claims (3)

A cylindrical label material attached to a preform and stretched by blow molding together with the preform is a blow-molded container with a label that is detachably adhered to the outer peripheral surface of the container body,
The label material is
A label main body formed of a synthetic resin material;
It is formed in a strip shape extending from one end in the axial direction of the label material to the other end by a synthetic resin material having low compatibility with the synthetic resin material forming the label main body, and between the circumferential ends of the label main body A blow molded container with a label, characterized by having a break portion that is detachably joined to a label main body portion. The label main body is formed of a first synthetic resin material that is a polyolefin resin or a polyester resin,
30 to 50% by weight of the first synthetic resin material and 3 to 20% by weight of a second synthetic resin material that is an ethylene / vinyl alcohol copolymer resin or nylon that cannot be bonded to the first synthetic resin material. And 30 to 50% by weight of a third synthetic resin material that is an adhesive polymer for allowing the first synthetic resin material and the second synthetic resin material to be bonded to each other. The blow molded container with a label according to claim 1.   The blow molded container with a label according to claim 2, wherein the fracture portion further includes 5 to 20% by weight of a fourth synthetic resin material that is an ethylene-methacrylic acid copolymer resin.

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