JPS62208349A - Packaging material for easy-open paper vessel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a packaging material for making an easy-to-open paper container.

[Conventional technology]

Conventionally, in order to make paper containers easier to tear and open, it has been possible to make paper containers using packaging materials consisting of paper-based materials laminated over the entire surface with stretched polyethylene or polypropylene that has been strongly stretched in one direction. It is being done.

[Problem that the invention seeks to solve]

However, the above-mentioned conventional paper containers do not have sufficient processing suitability when folding the packaging material or raising the box, and there are disadvantages in that the carton blank is difficult to fold and the box is difficult to raise.

Furthermore, since the stretched film is present over the entire area of the seal, there is a drawback that heat efficiency during lamination +3 processing is poor.

Therefore, the problem to be solved by the present invention is to provide a packaging material for an easy-to-open paper container that has longer processing suitability than the conventional packaging material.

[Failure to solve the problem]

The packaging material for easy-open paper containers according to the present invention is mainly made of paper,
In a paper container packaging material in which a heat-sealing layer is laminated on the inner surface of the paper container, a stretched plastic tape strongly stretched in the longitudinal direction is applied to a partial area of the upper or lower surface of the heat-sealing layer. It is something that

In the present invention, aluminum foil or polyvinylidene chloride film, xpmr (polyvinylidene chloride coated polyester), KOPF (polyvinylidene chloride coated stretched polypropylene), KON
(Polyvinylidene chloride coated stretched nylon), KPT (
It is also possible to laminate barrier films such as polyvinylidene chloride coated cellophane (polyvinylidene coated cellophane) or ethylene-vinyl acetate copolymer, and to construct the main part from a composite material of paper and aluminum foil or barrier film.

Further, it can be carried out by a method such as bonding between layers constituting the packaging material of the present invention.

Next, low-density polyethylene, high-density polyethylene, polypropylene, ionomer, etc. can be applied as a heat-sealing layer.

Next, in the present invention, a stretched plastic tape made of stretched polyethylene, polypropylene, polyester, or the like that has been strongly stretched in the longitudinal direction can be used as the stretched plastic tape. The width of the stretched plastic tape must be greater than the width at which the container wall is torn and removed to open the paper container. For example, when creating a paper container with a width of 10 mm and which is to be opened by tearing and removing one wall of the container, the ideal width of the stretched plastic tape is 10 mm to 20 mm wide.

[For production]

In the packaging material of the present invention, the stretched plastic tape forms the easily tearable portion of the paper container.

〔Example〕

Example 1 An aluminum foil having a thickness of 7 μm was laminated onto a printed carton (200 P/kg) via melt-extruded low-density polyethylene. Next, the entire surface of the aluminum foil of the obtained laminate is coated with an anchor material made of a solvent-dive adhesive, and then a low-density polyethylene bath-melt extruded is applied to some areas of the aluminum foil to give a width. A uniaxially stretched polyethylene tape (thickness: 20 μm) strongly stretched in the longitudinal direction of 30 mm was laminated.

Next, a 40-μm-thick low-density polyethylene film was placed opposite the aluminum wafer 16 laminated with the uniaxially stretched polyethylene tape, and low-density polyethylene was melt-extruded between the two, and the uniaxially stretched polyethylene tape was laminated with the aluminum wafer 16 through the molten polyethylene. A low-density polyethylene film is laminated to the foil, and stretched polyethylene tape (6)/melt extrusion PE (7)/P
A packaging material having the layered structure of R film (8) was obtained.

Use this packaging material! g2 A pair of side panels as shown in the diagram (c), the front panel, the rear panel r24, and the rear panel C241 (6) connected to the rear panel (c), the front and rear panels (2) (goods) Upper panel (G) connected to the upper end, 1
The lower panel (A) is connected to the lower end of rear panel t5fJ 641, and the folding flaps (to) are connected to the upper and lower ends of both side panels 11 (23). 2) 1. Front panel 2.
Laterally in the area of the side panels, rear panel (2), and glue flap (c)? = Formed a blank that is elongated and located. In the figure, @ (7) indicates the two notches provided to make tearing easier. 311 indicates the folded part that is folded outward when pasting. Next, the folded part 61 of this blank is folded outward. In the folded state, attach the adhesive flap (2) to the side panel 3υ, and with the item to be packaged inside, fold the folding flap (to) at right angles to the side panel 12υ, (c). Place the rain cover panel (A) on top, attach both panels □□□ (to) and close the top end of the box. In the same way, close the bottom end of the box.
! A packaging box containing contents as shown in JI3 was obtained.

The folding process in the process of making this packaging box c3 and the workability of raising the sack-attached box were good.

In addition, the workability of pasting was also good.

Further, when an opening test was conducted on the produced packaging box 07J, it was possible to reliably tear the box in a predetermined direction and open it, as shown in Figure 4.

Example 2 Same as Example 1, except that instead of the uniaxially stretched polyethylene tape, a uniaxially stretched polypropylene tape strongly stretched in the longitudinal direction with a width of 30% and a thickness of 20 μm was used, and paper/melt extrusion X'W/) , J'9/Anchor 9/Melt-extruded PE/-axially oriented polypropylene tape/Melt-extruded I'm/PE! A packaging material with a layered structure of film was obtained. A packaging box with contents was obtained in the same manner as in Example 1 using this 8 yen material.

In the process of making this packaging box, the folding process, sack pasting &
] The workability of producing dark blue was good.

In addition, the performance of the pasting process was also good.

Furthermore, when an opening test was conducted on the prepared packaging box containing the contents, it was possible to reliably tear the box in a predetermined direction and open it.

Example 5 Printed carton (basis weight: 200P/flf)
Aluminum foil with a thickness of 7 μm was laminated with low-density polyethylene that was melt-extruded. Next, the entire surface of the aluminum foil of the obtained laminate is coated with an anchor material made of a solvent-type adhesive, and then a 30 mm wide anchor material is applied to a partial region of the aluminum foil through melt-extruded low-density polyethylene over the entire surface of the aluminum foil. A uniaxially stretched polyethylene tape (thickness: 20 μm) that had been strongly stretched in the longitudinal direction was laminated.

Next, low-density polyethylene was melt-extruded onto the laminated aluminum foil surface of the uniaxially stretched polyethylene tape.
Melt extrusion/melt extrusion Pl coating aluminum foil surface and -axially stretched polyethylene tape surface! ! (5)/-Axially oriented polyethylene tape 46)/f# melt extrusion PI! 1
(A packaging material having a layer structure of 91 was obtained. Using this packaging material, a packaging box with contents was obtained in the same manner as in Example 1. In the process of making this packaging box, the folding process and the box pasted with a sack were performed. The workability during the pasting process was also good.

Furthermore, when an opening test was conducted on the prepared packaging box containing the contents, it was possible to reliably tear the box in a predetermined direction and open it.

Example 4 Same as Example 3, except that instead of the stretched polyethylene tape, an axially stretched polypropylene tape with a width of 30'% and a thickness of 20 μm strongly stretched in the longitudinal direction/melt extrusion P
A packaging material having the layer structure I was obtained. Using this packaging material, a packaging box containing the contents was obtained in the same manner as in Example 1. The folding process in the process of making this packaging box and the workability of folding the sack-attached box were good. Furthermore, when we conducted an opening test on the prepared packaging box containing the contents, we were able to reliably tear it in the prescribed direction and open it.

Example 5 An aluminum foil having a thickness of 7 μm was laminated onto a printed carton (basis weight: 2001−/d) via melt-extruded low-density polyethylene.

Next, the entire surface of the aluminum foil of the obtained laminate is coated with an anchor material such as a solvent-based adhesive, and then a low density polyethylene melt-extruded onto the entire surface of the aluminum foil is applied to a part of the aluminum foil surface. Width 30%
A uniaxially stretched polyethylene tape (thickness 20 μμ) that has been strongly stretched in the longitudinal direction is laminated to form a sheet of paper (1) / melt extruded PP (2) / JJ product (3) / anchor single layer (4) as shown in the '146 diagram. )/melt extrusion pg(5)/-A packaging material having a layered structure of axially oriented polyethylene tape t61 was obtained. The folding process in the process of making this packaging box and the workability of raising the box pasted with the sack were good. In addition, the workability of pasting was also good.

Additionally, when we conducted an opening test on the 8 boxes containing the contents, we found that they were reliably torn in the specified direction f! I was able to open it.

Example 6 Same as Example 5, but instead of using uniaxially stretched polyethylene tape, the width was 30'% s and the thickness was 20μ in the longitudinal direction C:
A packaging material having a layered structure of strongly oriented uniaxially stretched polyb-a-pyrene tape was obtained. Using this packaging material, a packaging box with contents was obtained in the same manner as in Example 1.The folding process in the process of making this packaging box and the workability of folding the box pasted with the sack were good. .Furthermore, the workability of the pasting process was good.

In addition, when we conducted an opening test on the prepared packaging box containing the contents, we were able to reliably tear it in a predetermined direction and open it.

Example 7 A uniaxially oriented polyethylene tape (thickness: Next, an aluminum foil with a thickness of 7μ was laminated on the surface of the carton laminated with the uniaxially stretched polyethylene tape through melt-extruded low-density polyethylene.Next, low-density polyethylene was extruded and laminated on the surface of the aluminum foil. hand,
Paper as shown in Figure 7 (1)/melt extrusion PE (2a)/-
Axial oriented polyethylene tape (6)/melt extrusion PE (2b
) / Al extinguisher (3) / Bath melt extrusion Pl! : A packaging material having the layer structure of (9) was obtained. The folding process in the process of making this packaging box and the workability of folding the sack-attached box were good. In addition, the workability of processing (sticking) was also good.

Furthermore, when an opening test was conducted on the prepared packaging box containing the contents, it was possible to reliably tear the box in a predetermined direction and open it.

Example 8 Same as Example 7, except that instead of the axially stretched polyethylene tape, a uniaxially stretched polypropylene tape strongly stretched in the longitudinal direction with a width of 30% and a thickness of 20 μm was used. A packaging material having a layered structure of /melt extrusion pz/muj foil/melt extrusion PI was obtained. The folding process in the process of making this 8-bag box and the workability of raising the box with the sack attached were good.

In addition, the workability of pasting was also good.

When we conducted an opening test on eight (8) boxes, we were able to reliably tear them in the specified direction and open them.

Examples 9 to 16 Same as Examples 1 to 8, except that 15 μm thick KPET (polyvinylidene chloride foot polyester) was used instead of aluminum foil, and paper/melt extruded PE/K
PKT/melt extrusion PI/-axially stretched polyethylene tape/
Melt extrusion Pg/pg film, paper/melt extrusion PK/
K P E T / Melt extrusion PK / - Axial oriented polypropylene tape / Melt extrusion P E / P In film, paper / Melt extrusion P W / K P E T / Melt extrusion P
I/-axially oriented polyethylene tape/melt extruded PE, paper/
Melt extrusion P K / K P Fiτ / Melt extrusion PI /
- Axial oriented polypropylene tape/melt extrusion PE, paper/melt extrusion P] lc/KPI! iT/melt extrusion PI/-axially oriented polyethylene tape, paper/melt extrusion PI! :/KPK
T/melt extruded PFt/-axially oriented polypropylene tape,
Paper/-axially oriented polyethylene tape/melt extrusion PK/
A packaging material of one composition was obtained: K P Fi T /melt extruded PE1 paper/-axially oriented polypropylene tape/melt extruded PK/KPET/melt extruded PE. Packaging boxes containing contents were obtained in the same manner as in Example 1 using these packaging materials.

All of the packaging materials mentioned above had good workability in folding in the process of making packaging boxes and in forming lees pasted onto sacks. In addition, the workability of pasting was also good.

Example 17 A 3-width film was created through melt-extruded low-density polyethylene in a partial area of a printed carton (basis weight: 200P/-).
A uniaxially stretched polyethylene tape (thickness: 20 μm) that had been strongly stretched in the longitudinal direction at 0% was laminated. Furthermore, low density polyethylene is extruded and laminated to make paper/melt extrusion P.
A packaging material having a layer structure of FX/-axially oriented polyethylene tape/melt extruded PE was obtained. Example 1 using this packaging material
A packaging box with contents was obtained in the same manner as above. The folding process in the process of making this packaging box and the workability of raising the box pasted with the sack were good. In addition, the workability of pasting was also good.

In addition, when we conducted an opening test on the prepared packaging box containing the contents, we were able to reliably tear the box in a predetermined direction and open it.

〔Effect of the invention〕

As described in detail above, the packaging material for easy-open paper containers of the present invention is a packaging material for paper containers that is mainly made of paper and has a heat-sealed layer laminated on the inner surface of the paper container. Since the stretched plastic tape, which is strongly stretched in the longitudinal direction, is laminated on a partial area of the upper or lower surface of the sealing layer, it has the advantage of being easy to fold and raise the box. In addition, since the stretched tape is present only in some areas, it has the advantage of high thermal efficiency during processing.In addition, in C2, the stretched film is not provided over the entire surface of the packaging material, but is applied to local areas as a stretched tape. Since the packaging material is provided at the same time, it is possible to reduce the cost of packaging materials.

[Brief explanation of drawings]

The first factor is a cross-sectional view of the packaging material of Example 1 of the present invention, Figure 2 is a plan view of a carton blank using the packaging material of the present invention, and Figure 3 is a content obtained using the carton blank shown in Figure 2. FIG. 4 is a perspective view of the packaging box shown in FIG. 3 in an unsealed state, and FIGS. 5 to 7 are further C: sectional views of the packaging material of another embodiment. (1)・・・・・・・・・・・・・・・Paper (2)
・・・・・・・・・・・・・・・・・・Melt extrusion PE (
3＞・・・・・・・・・・・・・・・・・・htm-6
)・・・・・・・・・・・・・・・Stretched polyethylene tape (5), (7)・・・・・・・・・Melt extrusion PI (8)・・・・・・・・・・・・・・・
・PK Film Machikan Applicant Dainichi Fu Printing Co., Ltd. Agent Patent Attorney Atsumi Konishi Figure 1 Figure 2 Figure 3 Figure 4

Claims (5)

[Claims] (1) In a packaging material for paper containers that is mainly made of paper and has a heat seal layer laminated on the inner surface of the paper container,
A packaging material for an easy-open paper container, characterized in that a stretched plastic tape strongly stretched in the longitudinal direction is laminated on a partial area of the upper surface or lower surface of the heat seal layer. (2) Aluminum foil is laminated on paper, and stretched polyethylene or polypropylene tape that is strongly stretched in the longitudinal direction is laminated on a partial area of the upper surface of the aluminum layer, and the stretched polyethylene or polypropylene tape surface and the aluminum foil surface are further covered. Claim 1, characterized in that a heat-sealing layer made of polyethylene is laminated thereon.
Packaging materials for easy-open paper containers as described in Section 1. (3) Stretched polyethylene or polypropylene tape strongly stretched in the longitudinal direction is laminated on a partial area on one side of the paper,
The packaging material for an easy-open paper container according to claim 1, further comprising aluminum laminated on the entire surface, and a heat-sealing layer made of polyethylene covering the aluminum foil surface. (4) Aluminum foil is laminated on paper, a heat seal layer made of polyethylene is laminated on the aluminum foil, and stretched polyethylene or polypropylene tape strongly stretched in the longitudinal direction is laminated on a partial area of the upper surface of the heat seal layer. A packaging material for an easy-open paper container according to claim 4, characterized in that: (5) A patent claim characterized in that a heat-sealing layer made of polyethylene is laminated on one side of the paper, and a stretched polyethylene or polypropylene tape strongly stretched in the longitudinal direction is laminated on a part of the upper surface of the heat-sealing layer. A packaging material for an easy-to-open paper container according to item 1.