JP2015131646A - Lid of container for separating liquid and solid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid of a container for separating liquid and solid, which does not require a release coat for controlling release between two upper and lower layers.SOLUTION: A lid (1) of a container for separating liquid and solid is constituted by laminating an outer lid (4) and an inner lid (5). The outer lid (4) is formed by sticking aluminum foil (7) to a lower surface of a polyethylene terephthalate layer (6) by polyurethane dry laminate adhesives. The inner lid (5) consists of: a polyethylene layer (8) which is weakly joined to the lower surface of the outer lid (4); and a polyethylene sealant film (9) which is joined to the lower surface of the polyethylene layer (8), and a plurality of separation holes (10) of the liquid and the solid which are container contents are drilled in the inner lid (5). The outer lid (4) is provided with a knob (11) for releasing the outer lid. The inner lid (5) is provided with a knob (12) for releasing the inner lid. Then, laminate strength between the outer lid (4) and the inner lid (5) is considered as 1.4 N/15 mm.

Description

  The present invention relates to a lid for a container for separating liquid and solid.

  In this specification, left and right refer to the left and right in FIG. 1, and front and rear refer to the lower upper portion in FIG. In addition, the shape of the separation hole is not limited, and notches such as U, V, and C are included. This is because, when the container is turned downward, the weight of the contents is added to the inside of the cut, and the inner part to which the weight is added hangs down to form a hole.

  When the lid consisting of two upper and lower layers is heat sealed to the lip flange of the container and sealed and opened, the lower layer of the lid remains on the container side, and a separation hole appears to separate the liquid and solid in the container Are disclosed in Patent Document 1 and Patent Document 2 below.

  However, in the case of the lid disclosed in the above-mentioned patent document, a peeling coat for facilitating peeling between the upper and lower two layers is required, and the cost is increased compared to a general lid.

  An object of the present invention is to provide a lid for a container for separating a liquid and a solid that does not have the above-described problems.

The lid of the container for separating liquid and solid according to the invention of claim 1 is formed by laminating an outer lid and an inner lid, and the inner lid is weakly joined to the lower surface of the outer lid, and the polyethylene layer and the lid It consists of a sealant film joined to the lower surface of the polyethylene layer, and at least one separation hole for separating the liquid and solid in the container is formed in the inner lid, and a knob for peeling the outer lid is integrally provided in the outer lid In addition, an inner lid peeling knob is integrally provided on the inner lid, and the laminate strength between the outer lid and the inner lid is 0.05 N / 15 mm width to 3.00 N / 15 mm width.

  The upper limit of the laminate strength is limited to 3.00 N / 15 mm width. If this value is exceeded, the outer lid becomes difficult to separate from the inner lid, and the lower limit of the laminate strength is limited to 0.05 N / 15 mm width. If the value is less than this value, the outer lid is easily separated from the inner lid with some time signature. Among the above-mentioned laminate strength range, 0.1 N / 15 mm width to 1.5 N / 15 mm width is particularly preferable.

  The lid of the container for separating liquid and solid according to the present invention comprises an outer lid and an inner lid laminated, and the inner lid is weakly joined to the lower surface of the outer lid and one or more polyethylene layers and the polyethylene layer. It consists of a sealant film joined to the lower surface, and at least one separation hole for separating the liquid and solid in the container is formed in the inner lid, and an outer lid peeling knob is provided integrally with the outer lid. The lid for the inner lid peeling is provided integrally with the lid, and the laminate strength between the outer lid and the inner lid is 0.05 N / 15 mm width to 3.00 N / 15 mm width. A release coat is unnecessary, and it is cheaper.

It is a top view in the state where the lid by the present invention was given to the container. FIG. 2 is an enlarged cross-sectional view taken along line II-II in FIG. 1. It is a top view of a container with an inner lid after peeling an outer lid among lids given to a container. FIG. 4 is an enlarged sectional view taken along line IV-IV in FIG. 3.

  1 and 2 show a polyethylene cup-like container (3) having a flange (2) on the upper edge with a lid (1) according to the invention. The lid (1) is formed by laminating an outer lid (4) and an inner lid (5). The outer lid (4) is obtained by bonding an aluminum foil (7) to the lower surface of a polyethylene terephthalate layer (6) with a polyurethane-based dry laminate adhesive. The inner lid (5) comprises a polyethylene layer (8) weakly joined to the lower surface of the outer lid (4) and a polyethylene sealant film (9) joined to the lower surface of the polyethylene layer (8). This is a laminate of an aluminum foil (7) and a polyethylene sealant film (9) by polyethylene extrusion. In this case, no anchor coat agent is used on the surface of the aluminum foil (7). As shown in FIGS. 2 and 3, the inner lid (5) is provided with 15 liquid and solid circular separation holes (10) on the left side of the container (3). It is lined up. The diameter of the circular separation holes (10) is 1.0 mm, and the distance between the circular separation holes (10) is 5.0 mm. On the left and right sides of the outer lid (4), an outer lid peeling knob (11) having a size exceeding the flange (2) of the cup-shaped container (3) is provided integrally with the outer lid (4). On the right side of the inner lid (5), an inner lid peeling knob (12) having the same size as the outer lid peeling knob (11) is provided integrally with the inner lid (5). On the left side of the lid (5), an outward projecting portion (13) having the same shape as the inner lid peeling knob (12) is provided, and the outer projecting portion (13) has a flange ( A separation notch (14) along the outer edge of 2) is provided from the lower side. The laminate strength between the outer lid (4) and the inner lid (5) is 1.4 N / 15 mm. The seal strength of the sealant fill (9) used here is preferably about 10 to 15 N / 15 mm. If it is weaker than this, it will open at once between the sealant film (9) and the cup-shaped container (3), and if it is stronger than this, it will be difficult to open.

  In order to separate the solid and liquid in the cup-shaped container (3), the outer lid peeling knob (11) and the inner lid (5) of the lid (1) heat-sealed in the cup-shaped container (3) are used. 1) together with the outward projecting portion (13), and the outer lid (4) is pulled obliquely upward in the direction of the arrow in FIG. Then, the outer lid (4) is peeled off from the inner lid (5). However, due to the presence of the separation notch (14) in the inner lid (5), only the outer direction portion of the inner lid (5) is removed. Is removed from the cup-shaped container (3) together with the outer lid (4). The separation notch (14) is a trigger for easily peeling off the outer lid (4) from the inner lid (5) when the outer lid (4) is opened from the inner lid (5). Not necessary. If there is no separation notch (14), holding the inner lid peeling knob (12) and the outward projection (13), pulling it up diagonally in the direction of the arrow in FIG. It can be broken along the outer edge of (2) and can be opened from between the outer lid (4) and the inner lid (5) which are lower in strength than the sealing strength of the inner lid (5) and the container (3). As a result, as shown in FIGS. 3 and 4, the cup-shaped container (3) is in a state where the mouth is closed only by the inner lid (5), and is the container contents of the inner lid (5). A separation hole (10) for separating the liquid and the solid is exposed. If the cup-shaped container (3) is reversed, the liquid in the cup-shaped container (3) flows out through the container content separation hole (9), leaving a solid in the cup-shaped container (3). it can. Examples of solids and liquids include tofu and its moisture, yogurt fat and whey.

  Now, the lid (1) was heat-sealed to a polyethylene cup-shaped container (3) under the conditions of 180 ° C., 0.5 MPa, and 1 second, and the following evaluation test was performed using this as a specimen. Further, the polyethylene cup-shaped container (3) used was a blend of LLDPE and HDPE and injection molded. The lid (1) can also be used for a paper container having polyethylene laminated on the surface.

(1) Opening strength Open the specimen with the lid (1) heat-sealed in a polyethylene cup-shaped container (3),
The strength at the first opening (between the outer lid (4) and the inner lid (5)) and the strength at the second opening (between the inner lid (5) and the container (3)) were measured.

(2) Separation hole expression The lid (1) is a polyethylene cup-shaped container (3) Heat-sealed specimen is opened,
It was visually confirmed whether or not the separation hole (10) was developed in the inner lid (5) remaining on the container (3) side.

The results of the evaluation test are shown in the table below.

(1) Lid
(4) Outer lid
(5) Inner lid
(8) Polyethylene layer
(9) Sealant film
(10) Separation hole
(11) External lid peeling knob
(12) Inner lid peeling knob

1 and 2 show a polyethylene cup-like container (3) having a flange (2) on the upper edge with a lid (1) according to the invention. The lid (1) is formed by laminating an outer lid (4) and an inner lid (5). The outer lid (4) is obtained by bonding an aluminum foil (7) to the lower surface of a polyethylene terephthalate layer (6) with a polyurethane-based dry laminate adhesive. The inner lid (5) comprises a polyethylene layer (8) weakly joined to the lower surface of the outer lid (4) and a polyethylene sealant film (9) joined to the lower surface of the polyethylene layer (8). This is a laminate of an aluminum foil (7) and a polyethylene sealant film (9) by polyethylene extrusion. In this case, no anchor coat agent is used on the surface of the aluminum foil (7). As shown in FIGS. 2 and 3, the inner lid (5) is provided with 15 liquid and solid circular separation holes (10) on the left side of the container (3). It is lined up. The diameter of the circular separation holes (10) is 1.0 mm, and the distance between the circular separation holes (10) is 5.0 mm. On the left and right sides of the outer lid (4), an outer lid peeling knob (11) having a size exceeding the flange (2) of the cup-shaped container (3) is provided integrally with the outer lid (4). On the right side of the inner lid (5), an inner lid peeling knob (12) having the same size as the outer lid peeling knob (11) is provided integrally with the inner lid (5). On the left side of the lid (5), an outward projecting portion (13) having the same shape as the inner lid peeling knob (12) is provided, and the outer projecting portion (13) has a flange ( A separation notch (14) along the outer edge of 2) is provided from the lower side. The laminate strength between the outer lid (4) and the inner lid (5) is 1.4 N / 15 mm. Seal strength of the sealant fill arm used here (9) is about 10 to 15 N / 15 mm is preferred. If it is weaker than this, it will open at once between the sealant film (9) and the cup-shaped container (3), and if it is stronger than this, it will be difficult to open.

Claims (1)

A lid formed by laminating an outer lid and an inner lid, and the inner lid includes one or a plurality of polyethylene layers weakly joined to the lower surface of the outer lid and a sealant film joined to the lower surface of the polyethylene layer. The inner lid is provided with at least one separation hole for separating the liquid and the solid in the container, and the outer lid is provided with a knob for peeling the outer lid, and the knob for peeling the inner lid is integrally formed with the inner lid. A lid for a container for separating liquid and solid, which is provided and has a laminate strength between the outer lid and the inner lid of 0.05 N / 15 mm width to 3.00 N / 15 mm width.

Images