JP2854384B2 - Lid with partial opening function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides a lid for sealing an opening of a bottomed container, particularly a partial opening portion for pouring out contents, and has a partial opening function. A cover having the cover.

[Prior Art] A lid that seals an opening of a bottomed container and has a partially opened part for pouring out contents, particularly a conventional example in which the sealing performance and productivity are improved. As
There is a proposal in JP-A-62-12099.

FIGS. 7 and 8 are schematic diagrams using the conventional lid.
It is shown in the figure. According to this, the lid 120 is formed by sticking the coating layers 123 and 127 from both sides of the strip 125 having the holes P (the aluminum layer 121 is provided as necessary), and is shown in FIG. And seal the hole completely. The lower coating layer 127 is heat-sealed to the upper end face of the opening of the container 140, as shown in FIG. 7, to seal the contents in the container 140.

Then, in order to pour out the contents in the container, as shown in FIG. 8, by pulling up the peel tab portion T, the portion of the coating layer 127 sealing the portion of the hole P is torn off, The hole P is partially opened, and the contents are appropriately poured out from the opened hole P.

[Problems to be solved by the invention]

However, in such a conventional lid, it is difficult to bring the outermost part of the spout of the opened hole P as close as possible to the inner peripheral edge of the opening of the container.

For this reason, there is a problem that the contents are not completely poured out and remain in the container.

The present invention has been made in view of the above-described circumstances, and the object thereof is to solve the above-described problems, to be excellent in productivity,
In addition, it is an object of the present invention to provide a lid which is easy to open and has a partial opening function in which the contents are completely poured out without remaining contents.

[Means for solving the problem]

In order to solve such a problem, the invention according to claim 1 includes a partial opening (P) for pouring out the contents in the container, and a lid body for sealing an opening of the container (70). In (1), the lid (1) is a laminate having a first substrate (10) and a second substrate (40) joined on the first substrate (10), The substrate (10) is a base body having a first layer (11) and a second layer (15) on both sides of an intermediate layer (13) containing polybutylene terephthalate or polycarbonate, respectively. The first substrate (10) is formed of a base body,
Along with the external shape of the partially opened portion (P), the container (7
A band-shaped through-hole (E) reaching the inner peripheral edge of the opening of (0) is formed, a band (55) is buried in the band-shaped through-hole (E), and a material (55a) of the band (55) is formed. The lid according to claim 2 is a cover member having a partial opening function, which is made of a material having different mechanical properties from the material of the laminated base body of the first substrate (10). Is provided in advance with a strip-shaped through-hole (E) for cutting out the partially-opened portion (P) along the external shape of the partially-opened portion, and the band material (55a) is provided in the through-hole (E)
Is formed by filling and sealing from the side of the joint surface between the first substrate (10) and the second substrate (40). The band body (55) according to claim 1, wherein the band material (55a) is interposed between the first substrate (10) and the second substrate (40) to join them, and at the same time, the band-shaped through hole ( A cover material having a partial opening function according to claim 1, formed by filling and sealing the band material (55a) in E) from the joining surface side.

[Action]

The lid body of the present invention is a base body having a first substrate, a first layer and a second layer on both sides of an intermediate layer containing polybutylene terephthalate or polycarbonate, respectively.
These are constituted by a co-extruded laminated base body, and a band-shaped through hole is formed in the laminated base body along a substantially partially opened portion outer shape for cutting out a partially opened portion, and the band is embedded in the band-shaped through hole. Since the material of the band was made of a material having different mechanical properties from the material of the laminated base body of the first substrate,
The openability is extremely excellent, and the outermost part of the partial opening can be the inner peripheral edge of the container opening, so that the contents can be reliably poured out. In addition, the productivity of the lid is significantly improved.

〔Example〕

Hereinafter, an embodiment of the lid 1 having a partial opening function according to the present invention will be described with reference to FIG. 1 to FIG.

FIG. 1 is a front view in which a lid 1 of the present invention is attached to an opening of a bottomed container 70, and FIG. 2 is a plan view thereof. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 2, and FIG. 4 is a cross-sectional view showing a state where the lid of FIG. 3 is formed.

As shown in FIG. 2, the structure of the lid 1 is a portion S including a partially opened portion P (width L1) and a band 55 (see FIG. 3) surrounding the outer shape of the partially opened portion P. (Width L1 ~ L2),
These are roughly divided into a lid body B as the remaining portion. Of these, the partially opened portion P and the lid body B are usually made of the same material, while the portion S including the band is made of a material having different mechanical properties from the partially opened portion P. Is done.

The structure of the lid 1 will be described in more detail. As shown in FIGS.
And a second substrate 40. The lid 1 of the present embodiment has the following material configuration assuming that the target container to be heat-sealed is a polyester-based container.

In the case of the present embodiment, the first substrate 10 has a basic structure in which a three-layer laminate of a first layer 11, an intermediate layer 13, and a second layer 15 is used as a laminated base body. A band 55 (width L1 to L2) is provided so as to surround.

The materials used for these three-layer laminates are as follows: the intermediate layer 13 is made of polybutylene terephthalate or polycarbonate;
And the second layer 15 is an extruded type polyethylene terephthalate (hereinafter simply referred to as EC-PET). This three-layer laminate is formed by simultaneous extrusion of three layers. As a result, productivity is significantly improved.

On the other hand, in this embodiment, the material 55a of the band 55 is EC-PET.
Is used. As EC-PET, non-crystalline or low-crystalline copolymerized polyethylene terephthalate having a glass transition point of 40 ° C. or higher is preferable from the viewpoint of sealing properties. The copolymerized polyethylene terephthalate is obtained by partially replacing terephthalic acid with isophthalic acid or partially replacing ethylene glycol with cyclohexane dimethanol.

In addition, the material 55a of the band 55 is usually
It is interposed as an adhesive layer 50 with the substrate 40, and has a role of bonding the substrates 10, 40.

The second substrate 40 thus bonded by the adhesive layer 50
In the case of the present embodiment, further comprises a three-layer laminate of a first layer 41, a second layer 43, a third layer 45, these materials, for example,
The first layer 41 is a biaxially stretched type polyethylene (hereinafter simply referred to as O-PET), the second layer 43 is aluminum foil, and the third layer 45 is O-PET. The reason why the first layer 41 is made of O-PET in consideration of the adhesiveness to the first substrate 10 via the adhesive layer 50 and that the second layer 43 is made of aluminum foil in consideration of the barrier property The reason why the third layer 45 is made of O-PET is, for example, for convenience of printing a lid. This laminate is
It is formed by various known methods such as dry lamination.
The second layer 43 and the third layer 45 are not always necessary.

Next, a method for manufacturing the lid 1 of the present invention will be described.

(1) Molding of the first substrate 10 (before forming a strip) The intermediate layer 13 containing polybutylene terephthalate or polycarbonate and the first layer 11 and the second layer 15 of EC-PET on both sides thereof are simultaneously co-extruded. A laminated base body is formed.

Next, the fourth through-hole E is punched out along the outer shape of the partially opened portion for cutting out the partially opened portion.
The state of the first substrate 10 shown in the figure is reached.

(2) Forming of the second substrate 40 A predetermined three-layer laminate (first layer 41, second layer 43, third layer 45) is formed by, for example, dry lamination (the second substrate 40 shown in FIG. 4). .

(3) Bonding of the first substrate 10 and the second substrate 40 and formation of a strip The second layer 15 and the second substrate 40 of the first substrate 10 shown in FIG.
The first substrate 10 and the second substrate 40 are joined while extruding the molten EC-PET between the first layer 41 and the first layer 41. On this occasion,
Part of the melted EC-PET fills and seals the band-shaped through-hole E, whereby the band 55 is formed.

Through the above steps, the lid 1 of the present invention is formed, and the lid 1 is heat-sealed to the opening of the container 70 as shown in FIG. Then, in order to pour out the contents in the container, the tab (FIG. 2) of the partially opened portion P is gripped and pulled up to open the partially opened portion P (FIGS. 5 and 6). Figure).

At the time of this opening, polybutylene terephthalate or polycarbonate having high mechanical strength of the material of the intermediate layer 13 in the partially opened portion P serves as a guide, so that the partially opened while maintaining the length L1 can be surely performed. Further, if necessary, a notch is formed in the partial opening portion P, so that opening is further facilitated.

As described above, the lid of the present invention employs the above-described material configuration because the container to be sealed is a polyester-based container, but it is necessary to appropriately select the material of the lid 1 according to the material change of the target container. . Also in this case, it is needless to say that the material of the band 55 needs to be a material having mechanical properties different from those of the base material of the first substrate 10, particularly, polybutylene terephthalate or polycarbonate.

〔The invention's effect〕

According to the present invention, a base body having a first layer and a second layer on both sides of an intermediate layer containing polybutylene terephthalate or polycarbonate, respectively, is provided on a first substrate comprising a laminated base body obtained by co-extrusion molding these. , A band-shaped through-hole is formed in the first substrate along the outer shape of the partially opened portion, a band is buried in the band-shaped through-hole, and the material of the band is applied to the base of the first substrate. Since the material is different from the material in mechanical properties, the partially opened portion can be easily opened along the band using the base material of the first substrate as a guide. Further, since the band-shaped through-opening is formed so as to reach the inner peripheral edge of the opening of the container, the partial opening on the lid by opening the partial opening can be extended to the inner peripheral edge of the container opening. Yes, so that the contents are completely poured out without remaining in the container.

[Brief description of the drawings]

FIG. 1 is a front view in which a lid 1 of the present invention is attached to an opening of a container, FIG. 2 is a plan view thereof, and FIG. 3 is III-III in FIG.
FIG. 4 is a cross-sectional view showing a state in which the lid of FIG. 3 is formed, FIG. 5 is a front view showing a state in which the partially opened portion is opened, and FIG. 6 is a state shown in FIG. FIGS. 7 and 8 are cross-sectional views after partial opening, each of which is a schematic view using a conventional lid. 1 Lid 10 First substrate 40 Second substrate 55 Band P Partially opened part

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Asahi Numakura 1-1-1 Ichigaya-Kaga-cho, Shinjuku-ku, Tokyo Dai Nippon Printing Co., Ltd. (56) References JP-A-60-204453 (JP, A) JP-A-57-114462 (JP, A) JP-A-62-39466 (JP, A) JP-A-64-23943 (JP, A) JP-A-63-177277 (JP, U) JP-A-2-11068 (JP, A) JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B65D 35/00-55/16 B65D 17/00-17/52 B65D 77/30-77/38 B65D 81/34

Claims (3)

(57) [Claims] 1. A lid having a partially opened portion for discharging contents in a container and sealing an opening of the container, wherein the lid is bonded to a first substrate and the first substrate. Second
And a base body having a first layer and a second layer on both sides of an intermediate layer containing polybutylene terephthalate or polycarbonate, respectively. The first substrate is formed with a band-shaped through-hole extending along the outer shape of the partially opened portion and reaching the inner peripheral edge of the opening of the container, and the band is embedded in the band-shaped through-hole. A lid material having a partial opening function, wherein a material of the band body is a material having different mechanical properties from a material of the laminated base body of the first substrate. 2. The band according to claim 1, wherein a band-shaped through-hole is provided in advance along the external shape of the partially opened portion for cutting out the partially opened portion, and the band material is provided in the through-hole with the first substrate. 2. The lid material having a partial opening function according to claim 1, wherein the lid material is formed by filling and sealing from the side of the joint surface with the second substrate. 3. The band according to claim 1, wherein a band material is interposed between the first substrate and the second substrate to join them, and at the same time, the band material is inserted into the band-shaped through hole from the joining surface side. 2. A cover material having a partial opening function according to claim 1, wherein the cover material is formed by filling and sealing.