JP3768548B2 - Cup container - Google Patents

Description

[0001]
The present invention relates to a can be opened together easily when you sealed by heat sealing a lid member, related to Luke-up container used to house the semi-solid liquid or yogurt such as beverage Is.
[0002]
[Prior art]
Conventionally, paper cups for yogurt and the like have been formed from polyethylene-processed paper on both sides, and after filling the contents, the curled flange formed on the opening is heat sealed and sealed. is doing. And when opening, a cover material is peeled off from a flange part.
[0003]
[Problems to be solved by the invention]
For example, when a lid made of aluminum foil, polyethylene, and a hot melt agent is heat-sealed with respect to the paper cup having the above-described configuration, the lid material is firmly bonded to the polyethylene layer of the paper cup, so that it is often difficult to open the lid. Also, when the lid is peeled off, the thermoplastic resin as the adhesive surface with the paper cup is cut, and the paper layer is opened in a state where the inner layer is broken, and the broken surface is exposed and the appearance is not good. There is a problem. If the heat sealing temperature is lowered or the sealing time is shortened for the purpose of avoiding this, the sealing strength tends to be insufficient, and contents leak from the interface between the lid and the paper cup. End up.
[0004]
The present invention has been made in view of the above-described problems, and the object of the present invention is to prevent the paper layer of the paper cup from being destroyed when the heat-sealed lid member is peeled off, and to reduce the sealing strength. and to provide a Luke-up container easily openable can be obtained without.
[0005]
To achieve the above object, mosquito-up container of the present invention consists of processed paper obtained by laminating a thermoplastic resin layer on both surfaces of the paper layer, a paper cup with a curled flange, easy peel sealant top a cup container comprising a cover member that is bonded by heat sealing to the flange portion of the chromatic and paper cups in the inner layer, as a processing paper constituting the paper cup, with a thermoplastic resin layer and paper layer on the side where the cover member is in contact It is characterized by using a processed paper having a biaxially stretched polyester film laminated therebetween.
[0006]
As the thermoplastic resin layer, polyethylene (PE), polyester (PET), ethylene-vinyl acetate alcohol copolymer (EVOH), or the like is used. Further, the biaxially oriented polyester film, Ru film der having heat resistance with a certain strength.
[0007]
Ca-up container of the present invention having the above configuration, Ru der those sealed by heat sealing a lid member having easy peel sealant innermost layer. When the lid member is peeled off, destruction occurs at the interface between the thermoplastic resin layer in contact with the lid member and the innermost layer of the lid member or in the innermost layer of the lid member.
[0008]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0009]
In FIG. 1, reference numeral 1 denotes a paper cup having a flange portion 2 formed in a curl shape toward the outside. As a processed paper constituting the paper cup 1, a polyethylene layer 4 is formed on the inner surface side of the paper layer 3, and biaxial stretching is performed. A polyester film 5 and a polyethylene layer 6 are laminated in order, and a polyethylene layer 7 is laminated on the outer surface side with an appropriate printed pattern interposed therebetween. Then, the biaxially stretched polyester film 5 Ru Oh strength of and heat resistance, the polyethylene layer 4, 6, 7 are laminated by extrusion laminating (EC processing).
[0010]
Reference numeral 8 denotes a lid, which is formed by laminating a polyethylene layer 10 and an easy peel sealant 11 on the back surface of the polyester layer 9, and the lid 8 is completely bonded to the flange portion 2 of the paper cup 1 by heat sealing. Has been.
[0011]
In the cup sealed containers as described above, and the state polyethylene layer 6 of the innermost layer is obtained by biaxially stretched polyester film arm 5 and highly adhesive in contact with it in the paper cup 1, the flange portion 2 becomes strong Therefore, when the lid member 8 is peeled off from the paper cup 1, as shown in FIG. 2, the innermost polyethylene layer 6 in the paper cup 1 and the easy peel sealant 11 layer in the lid member 8 are broken or in the easy peel sealant 11 layer. Opened.
[0012]
In the above embodiment, the paper cup having the flange portion formed in the curl shape toward the outside has been described as an example. However, the paper cup targeted by the present invention has the flange portion formed in the curl shape toward the inside. You may have. In this case, as the processed paper constituting the paper cup 1, a polyethylene layer 4, a biaxially stretched polyester film 5, and a polyethylene layer 6 sandwiching an appropriate printing layer are laminated on the outer surface of the paper layer 3, and the inner surface side. For this, a laminate of polyethylene layer 7 is used.
[0013]
【The invention's effect】
As described above, Ca-up container of the present invention, a processed paper constituting the paper cup and laminated biaxially oriented polyester film between the thermoplastic resin layer and paper layer on the side where the cover member is in contact Since the processed paper was used , the lid material having the easy peel sealant in the innermost layer was heat sealed and sealed, and when the lid material was peeled off and opened, the thermoplastic resin layer and the lid material in contact with the lid material were sealed. Since breakage occurs between the inner layer and the innermost layer of the lid, the paper layer on the paper cup side does not break. In addition, the easy-openability can be obtained without impairing the sealing strength.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view showing a paper cup in a state where a lid material is heat-sealed.
FIG. 2 is a partial cross-sectional view showing a paper cup in a state where a lid member is peeled off.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Paper cup 2 Flange part 3 Paper layer 4 Polyethylene layer 5 Biaxially stretched polyester film 6 Polyethylene layer 7 Polyethylene layer 8 Lid

Claims (1)

It consists processed paper obtained by laminating a thermoplastic resin layer on both surfaces of the paper layer, a paper cup with a curled flange portion, and a lid member which is adhered by heat sealing easy peel sealant on the flange portion of the chromatic and paper cups innermost layer a cup container made, characterized in that the coated paper constituting the paper cup, with a processed paper obtained by laminating a biaxially stretched polyester film between the thermoplastic resin layer and paper layer on the side where the cover member is in contact and to Luke-up container.

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