JP3274267B2 - Powder detergent paper container lid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid for sealing an opening edge of a paper container for detergent powder.

[0002]

2. Description of the Related Art To seal an opening edge of a conventional powder detergent paper container, a plastic lid is fitted to the opening edge, and this is heat-sealed to the opening edge, or a glue (for example, cold glue) is applied to a plastic film. (Trade name)] was adhered to the opening edge with a lid material coated with the lid material and sealed.

[0003]

In the above-mentioned conventional paper container in which a plastic lid is fitted to the opening edge of the paper container and heat-sealed, the number of parts is large because a plastic molded product is used. In addition, recycling is not possible, and incineration will cause high heat in disposal, leaving considerable problems.In addition, in the case of lid material coated with glue, drying of the glue This is not only time-consuming, but it also takes time and effort to handle, and in the case of bonding to a paper container that simply folds the opening edge, the folded part has a round shape and does not become flat. The glue is not evenly adhered to the part, and in order to solve this, a half cut is made outside the folded part and the part is folded from this part, so that this part becomes twice the paper thickness. With wider Te, it is necessary to work so that this surface is flat. However, since this surface shows a cut surface, when glue is used,
In opening, a problem of paper peeling occurs, and drying takes a long time, and the sealing efficiency with respect to a paper container is not improved.

[0004] The present invention has been made in view of such a point, and an object of the present invention is to provide a cover material having a round shape by simply folding the opening edge of a paper container. Another object of the present invention is to ensure that the sealing can be performed quickly and reliably, and to prevent the lid material from separating and separating into two members when the lid is opened.

[0005]

According to the present invention, in order to achieve the above object, a hot melt layer is formed on the innermost surface and a laminate having no release layer is used as a cover material. We are trying to solve the problem. Specifically, as a lid material of a powder detergent paper container, a sealing layer, a cushion material layer, a reinforcing material layer, and a paper layer are laminated from the inside, and a hot melt layer is used as the sealing layer. The layers include a modified EVA layer, an EMAA layer, and an E layer.
MMA layer, etc., and PET layer, OP
The P layer, the NY layer, etc., and the glass layer are glassine paper.

[0006]

Embodiments of the present invention will be described below. The present invention is suitable as a lid material which can seal the opening edge of the paper container of the detergent powder quickly and securely, and does not peel off from the middle when the lid is opened. is there. By the way, the specification of the conventional lid material is as follows: (a) glassine paper 25.8 g / m ² / wax 10 to 15
g / m ² / OPP20μ / wax 10 to 15 g / m ² / glassine paper 25.8 g / m ² This material is bonded using an adhesive such as vinyl acetate. (B) Glassine paper 25.8 g / m ² / PET 12 μ / easy heel sealant This is heat-sealed to the opening edge of a PP container or the like. In the type of (a) above,
Since the paste is used, the powder detergent is filled in a paper container and sealed with a lid, so drying and handling take time, so that the production speed does not increase and the production line (including the drying line) becomes longer. Therefore, even if the heat sealing method is better, in the type (b), the sealing strength is weak and the sealing property is not improved, and recycling is not possible.

In view of the above, the present invention selects a hot melt for bonding the lid material, and interposes a resin layer for sealing and sealing strength between the hot melt layer and glassine paper. That is, the lid material is a seal layer from the inside,
It is composed of a cushion material layer, a reinforcing material layer, and a laminated material of glassine paper. EMA is used as a resin layer having a sealing property and an adhesive property of the hot-melt layer interposed between the hot-melt layer as a sealing layer and the glassine paper as a cushioning property.
A layer, EMMA layer, modified EVA layer, etc., and resin layers of increased strength include PET layer, OPP layer, etc., and the heat sealing property, sealing property are high due to the interposition of these layers, and the strength is excellent. It becomes a lid material.

The specific specifications of the present invention are as follows: from outside, glassine paper 25.8 g / m ² / PET 10-20 μ / denatured E
VA 20 to 60 μ / HM 20 to 60 g / m ² . The above-mentioned specifications were because the sealability, strength, and moisture-proof properties of the glassine paper and hot melt layer alone were not good, so that the modified EVA cushion material layer improved the sealability, and the hot melt layer This is to improve the adhesion with the reinforcing material and increase the strength with the PET reinforcing material layer. With this, even if it is a simple folded surface that does not use half cut of the opening edge of the paper container,
The hot melt can easily flow due to heat and conforms to the surface, and has an extremely good sealing property in combination with the sealing cushion layer, and the PET layer increases the strength and improves the moisture resistance.

The lid material of the above-mentioned conventional specification (a) is obtained by making a half cut at the opening edge of the paper container and bonding and sealing the cut surface which is folded back using a glue. However, when opening with a force of 400 ± 100 gf from the corner, paper peeling may occur.However, the lid material of the specification of the present invention has a round shape which does not use a half cut at the opening edge of the paper container. The hot melt flows into the folded portion having a surface by heating, and is adapted to the surface and is firmly sealed. Therefore, even if the hot melt is pulled from the corner by a force of 600 ± 100 gf, no paper peeling occurs.

Next, regarding other specifications of the lid material, glassine paper 25.8 g / m ² / PET 12 μ / EMAA
30 μ / HM 20 g / m ² (Type A) Glassine paper 25.8 g / m ² / PET 12 μ / EMAA
30μ / HM40g / m ² (Type A) HM Type A Topco H-29 manufactured by Toyo Petrolite
7 Heat sealing temperature of 160 ° C. 0.3 sec 2 times or more If the edge of the opening has a step, the sealing strength is weak and the seal comes off. Has good sealing strength and sealing performance. (600 ± 200 gf / 15 min) In the above description, HM is hot melt, PP is polypropylene, OPP is biaxially oriented polypropylene, PET is polyester, NY is nylon, EVA is ethylene vinyl acetate copolymer, and EMAA is ethylene methacryl. Acid, EM
MA is an ethylene methyl methacrylate polymer.

Next, the drawings will be described.
FIG. 1A shows a lid material, and FIG. 1B shows a paper container. As shown in FIG. 2, the lid material (A) is made of a laminated material of a hot melt layer (1), a cushion material layer (2), a reinforcing material layer (3), and glassine paper (4) from the lower surface side which is the innermost layer. It becomes. As the cushion material layer (2), modified EVA, EMAA, EM
MA, etc., and as the reinforcing material layer (3), PET,
OPP, NY and the like. The paper container (B) is composed of a container body (a) and a hand (b), and the hand (b) is near the upper opening edge (6) of the body (5) of the container body (a). Is provided rotatably with respect to a projection (7) protruding from the base. (8) is a folded portion for reinforcing the opening,
The folded opening edge (6) has a rounded upper surface as shown in FIG. FIG. 4 shows a case in which a half-cut is formed in the body (5 ') of the container body (a) from the outside, and the half-cut is formed from the half-cut to form a folded part (8'). The upper surface is flat, and the cut surface is shown.

[0012]

According to the present invention, the lid material of the powder detergent paper container of the present invention employs a hot melt layer as its innermost layer. Since it does not require a drying means like glue, it does not take much time to seal, it is easy to handle by machine, and furthermore, the sealing property of hot melt and the adhesive cushion material layer following the hot melt layer With the interposition, even if the folded portion for reinforcing the opening edge of the paper container is an R-shaped surface, the fluidity of the hot melt and the cushioning property of the cushion material layer are both combined to enhance the sealing property. In addition, there is no risk of breakage when the lid is opened by the reinforcing material layer following the cushion material layer, and there is no release layer between the laminations, so there is no risk of peeling when opening the lid. It is very excellent is in.

[Brief description of the drawings]

FIG. 1 is a perspective view of a powder detergent paper container and a lid member.

FIG. 2 is a partially enlarged sectional view of a lid member.

FIG. 3 is a sectional view of an opening edge of the paper container.

FIG. 4 is a cross-sectional view of an opening edge that is turned back with a half cut.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS A Lid material B Paper container a Container body b Handle 1 Hot melt layer 2 Cushion material layer 3 Reinforcement layer 4 Glassine paper 5 Body 6 Opening edge 7 Protrusion 8 Folding part

Continuation of the front page (56) References JP-A-5-221446 (JP, A) JP-A-5-330568 (JP, A) JP-A-5-49687 (JP, A) (58) Fields investigated (Int) .Cl. ⁷ , DB name) B65D 5/64 B65D 53/00

Claims (1)

(57) [Claims] 1. A sealing layer of a hot melt layer from the inside,
A cushioning material layer such as a modified EVA layer, an EMAA layer, and an EMMA layer; a reinforcing material layer such as a PET layer, an OPP layer, and an NY layer;
Use a laminated structure made of glassine paper and use
Between the seal layer and the cushion material layer
A lid material for a powder detergent paper container characterized by not being provided.