Patent Description:
With the rapid developments of various techniques, the applications of the delaminatable containers become more and more extensive. However, when a delaminatable container is being used, an inner layer and an outer layer at a main body portion being in a delaminated state easily result in the inner layer and the outer layer at an opening portion being also delaminated. Then the inner layer and the outer layer may be totally delaminated and peeled off so as to impact the usage convenience. How to solve the said problem is also a bottleneck in a conventional manufacturing process. That is, the inner layer and the outer layer are required to be delaminated while unaffectedly unloading the content therein, but not required to be delaminated totally, and thereby there seems a conflict or a trade-off in the engineering design of the delaminatable container. A corresponding delaminatable container having an accommodation space delaminating with a decrease in contents, being according to the preamble of claim <NUM>, is disclosed in <CIT>, and <CIT> discloses a blow-molded bottle body.

Given the above, there is an urgent need in the market for a delaminatable container, which is featured with effectively preventing from the total delamination between the inner layer and the outer layer, and unaffectedly unloading the content therein.

A delaminatable container according to the present disclosure is presented in claim <NUM>. Dependent claims present further embodiments of the delaminatable container.

According to the present disclosure, a delaminatable container has a main body portion and an opening portion. The opening portion is located closer to an opening of the delaminatable container than the main body portion located thereto. An accommodation space of the delaminatable container is formed by a body inner surface of the main body portion and an opening inner surface of the opening portion. The delaminatable container includes a first layer and a second layer. The first layer includes a first tightly-attached section. At the main body portion, the first layer is located closer to the body inner surface than the second layer located thereto and is exposed on the body inner surface. The second layer includes a second tightly-attached section. The first tightly-attached section and the second tightly-attached section are tightly attached to each other. The first tightly-attached section and the second tightly-attached section are both located at the opening portion of the delaminatable container. The second tightly-attached section includes a second opening segment, and the second opening segment is exposed on the opening inner surface and extended along a direction from the opening towards the main body portion. The first tightly-attached section includes a sandwiched segment, the second tightly-attached section further includes an inner tightly-attached segment, the sandwiched segment and at least one part of the inner tightly-attached segment are tightly attached to each other, the sandwiched segment is not exposed on the opening inner surface, and the second opening segment is connected to the inner tightly-attached segment.

In one embodiment, the inner tightly-attached segment may be located closer to the opening inner surface than the sandwiched segment located thereto.

In one embodiment, an inner diameter of the opening inner surface may become smaller along a direction from the opening towards the main body portion.

In one embodiment, the second tightly-attached section may further include an outer tightly-attached segment. An inner surface of the sandwiched segment and at least one part of the inner tightly-attached segment are tightly attached to each other. An outer surface of the sandwiched segment and at least one part of the outer tightly-attached segment are tightly attached to each other.

The embodiment will be described with the drawings. For clarity, some practical details will be described below. However, it should be noted that the present disclosure should not be limited by the practical details, that is, in some embodiments, the practical details is unnecessary. In addition, for simplifying the drawings, some conventional structures and elements will be simply illustrated, and repeated elements may be represented by the same labels.

<FIG> is a three-dimensional view of a delaminatable container <NUM> according to the 1st embodiment not being part of the present invention. <FIG> is a side view of the delaminatable container <NUM> according to the 1st embodiment. <FIG> is a cross-sectional view along line 1C-1C of the delaminatable container <NUM> in <FIG>. <FIG> is a schematic view of part 1D in <FIG>. With reference to <FIG>, a delaminatable container <NUM> has a main body portion <NUM> and an opening portion <NUM>. The opening portion <NUM> is located closer to an opening <NUM> of the delaminatable container <NUM> than the main body portion <NUM> located thereto (i.e., located to the opening <NUM>). An accommodation space <NUM> of the delaminatable container <NUM> is formed by a body inner surface <NUM> of the main body portion <NUM> and an opening inner surface <NUM> of the opening portion <NUM>. The delaminatable container <NUM> includes a first layer <NUM> and a second layer <NUM>.

With reference to <FIG>, the first layer <NUM> includes a first tightly-attached section <NUM>. At the main body portion <NUM>, the first layer <NUM> is located closer to the body inner surface <NUM> than the second layer <NUM> located thereto (i.e., located to the body inner surface <NUM>) and is exposed on the body inner surface <NUM>. The second layer <NUM> includes a second tightly-attached section <NUM>. The first tightly-attached section <NUM> and the second tightly-attached section <NUM> are tightly attached to each other. The first tightly-attached section <NUM> and the second tightly-attached section <NUM> are both located at the opening portion <NUM> of the delaminatable container <NUM>. Accordingly, it is advantageous in preventing the delamination between the first layer <NUM> and the second layer <NUM> at the opening portion <NUM>, and unaffectedly unloading the content therein. Furthermore, for a delaminatable container according to the present disclosure, a first layer indicates the innermost layer at a main body portion, a second layer indicates an outer layer, i.e., except the innermost layer, at the main body portion, and a number of the second layer may be at least two.

In detail, the first tightly-attached section <NUM> and the second tightly-attached section <NUM> are both located at the opening portion <NUM> of the delaminatable container <NUM> and form an inwardly folded structure <NUM>. Accordingly, it is advantageous in preventing the delamination between the first layer <NUM> and the second layer <NUM> at the opening portion <NUM>, reducing the manufacturing cost, and increasing the production efficiency of the delaminatable container <NUM>.

Moreover, the inwardly folded structure <NUM> is formed in an original and general blow molding process to enlarge a contact area of a first layer of a blank thereof (i.e., the contact area between the first layer and a second layer of the blank), so as to increase the friction to achieve the tightly-attached and covering functions. The delaminatable container <NUM> can be formed integrally on the blow molding equipment without an additional tool or apparatus.

Furthermore, the first tightly-attached section <NUM> and the second tightly-attached section <NUM> can be formed in the manufacturing process of the delaminatable container <NUM>. For example, the first tightly-attached section <NUM> and the second tightly-attached section <NUM> can be formed during the blowing pin entering the molten blank prior to molding of the delaminatable container <NUM> in the manufacturing process. When the blowing pin enters the opening of the blank, the outer wall of the blowing pin and the first layer of the blank (i.e., the inner layer or the innermost layer of the blank) are attached. At least a part of the first layer of the blank is pulled inwardly by the outer wall of the blowing pin and folded inwardly along the opening inner surface (i.e., the inner surface at or near the opening), so that the first layer and the second layer (i.e., the outer layer of the blank) are tightly attached. Next, the inwardly folded structure <NUM> is formed by squeezed and cutting of the outer wall of the blowing pin and the mold, so that the delaminatable container <NUM> is featured with an enlarged contact area between the first layer <NUM> and the second layer <NUM> (i.e., the inner layer and the outer layer), and the second layer <NUM> has the function of covering the first layer <NUM> at the opening portion <NUM> and thereby being uneasy to peel off. A thickness of the first layer <NUM> at the opening portion <NUM> may be inconsistent or uneven. When the blowing pin enters the opening of the blank, the first layer <NUM> is squeezed in a direction from the opening <NUM> toward the main body <NUM>, and thereby the thickness of the first layer <NUM> becomes thicker (not shown in drawings) in the direction from the opening <NUM> toward the main body <NUM> while a shape of the opening inner surface <NUM> corresponding to a shape of the outer wall of the blowing pin. An outer shape and an appearance design of the delaminatable container <NUM> can be unaffected due to only the opening inner surface <NUM> of the opening portion <NUM> is molded by the blowing pin. Alternately, a blank may be squeezed and cut at an opening by an outer wall of a blowing pin and a mold with corresponding shapes, then high-pressure air is blown into the blank, and a delaminatable container is formed integrally with an individual or different shape of an opening portion.

The first tightly-attached section <NUM> includes a sandwiched segment <NUM>. The second tightly-attached section <NUM> includes an inner tightly-attached segment <NUM>. The sandwiched segment <NUM> and at least one part of the inner tightly-attached segment <NUM> are tightly attached to each other to increase the friction. The inner tightly-attached segment <NUM> is located closer to the opening inner surface <NUM> than the sandwiched segment <NUM> located thereto (i.e., located to the opening inner surface <NUM>), and the sandwiched segment <NUM> is not exposed on the opening inner surface <NUM>. Therefore, the sandwiched segment <NUM> of the first layer <NUM> is covered by the second layer <NUM> so as to increase the tightly attached strength. In an embodiment of the present disclosure, a delaminatable container has an opening normal direction, which is a normal direction of a virtual plane formed by an opening thereof. A part of a second layer is existed in a vertical direction which is toward an opening inner surface of the said normal direction with respect to a sandwiched segment.

Moreover, the inner tightly-attached segment <NUM> is not exposed on the opening inner surface <NUM>. Therefore, the first layer <NUM> exposed on the opening inner surface <NUM> is beneficial to simultaneously prevent from the delamination and reduce the manufacturing complexity.

The first tightly-attached section <NUM> further includes a first opening segment <NUM>. The first opening segment <NUM> is tightly attached to another part of the inner tightly-attached segment <NUM> and exposed on the opening inner surface <NUM>. The first opening segment <NUM> is extended along the direction from the opening <NUM> towards the main body portion <NUM> and connected to the sandwiched segment <NUM>. Accordingly, in the manufacturing process of the delaminatable container <NUM>, only a part of the first layer (i.e., the second layer being excluded) of the blank is pulled inwardly by the outer wall of the blowing pin and folded inwardly along the opening inner surface so as to be tightly-attached the second layer of the blank. Thus, the first opening segment <NUM> of the first layer <NUM> of the delaminatable container <NUM> after molding is exposed on the opening inner surface <NUM> at a position corresponding to the opening <NUM>, and it is advantageous in preventing the delamination between the first layer <NUM> and the second layer <NUM> at the opening portion <NUM>.

The delaminatable container <NUM> has an opening normal direction N1, which is a normal direction of a virtual plane <NUM> formed by the opening <NUM>. In the opening normal direction N1, a ratio of a length L6 of the sandwiched segment <NUM> to a length L5 of the first opening segment <NUM> is between <NUM> and <NUM> (<NUM> and <NUM> being included). In the 1st embodiment, the length L6 is <NUM>, the length L5 is <NUM>, and the ratio of the length L6 to the length L5 is <NUM>. The lengths L5 and L6 can be adjusted according to depths of the blowing pin entering the blank in the manufacturing process of the delaminatable container <NUM>. Therefore, it is beneficial to increase the tightly-attached firmness.

An inner diameter of the opening inner surface <NUM> becomes smaller along a direction from the opening <NUM> towards the main body portion <NUM>. Accordingly, the first tightly-attached section <NUM> tightly-attached the second tightly-attached section <NUM> in a non-parallel manner is advantageous in reducing the risk of being easily peeling off or delaminatable and simultaneously maintaining the convenience of manufacturing. In addition, the shape of the opening inner surface <NUM> can be corresponding to the shape of the outer wall of the blowing pin used in the manufacturing process of the delaminatable container <NUM>, that is, a shape of at least one part of the outer wall of the blowing pin may be narrower at a position closer to a tip of the blowing pin and wider at another position farther from the tip thereof. In other embodiment according to the present disclosure, a shape of an outer wall of the blowing pin may be in other geometric shapes.

The second tightly-attached section <NUM> further includes an outer tightly-attached segment <NUM>. An inner surface <NUM> of the sandwiched segment <NUM> and the part of the inner tightly-attached segment <NUM> are tightly attached to each other, and an outer surface <NUM> of the sandwiched segment <NUM> and one part of the outer tightly-attached segment <NUM> are tightly attached to each other, so as to increase the friction. The sandwiched segment <NUM> is not exposed on the opening inner surface <NUM>. Therefore, the sandwiched segment <NUM> of the first tightly-attached section <NUM> being covered inwardly and outwardly by the second layer <NUM> is advantageous in increasing the tightly attached strength.

Specifically, the first tightly-attached section <NUM> includes the first opening segment <NUM> and the sandwiched segment <NUM> in order along the direction from the opening <NUM> towards the main body portion <NUM>. The second tightly-attached section <NUM> includes the inner tightly-attached segment <NUM> and the outer tightly-attached segment <NUM> in order along a direction from the opening inner surface <NUM>, via the opening <NUM> towards an opening outer surface <NUM>. That is, the inner tightly-attached segment <NUM> and the outer tightly-attached segment <NUM> of the second tightly-attached section <NUM> cover the sandwiched segment <NUM> of the first tightly-attached section <NUM>, and are connected to each other near an end of the sandwiched segment <NUM> which is farther from the main body portion <NUM>. The first tightly-attached section <NUM> and the second tightly-attached section <NUM> form the inwardly folded structure <NUM>, which may be only formed by inwardly folding of the first layer of the blank of the delaminatable container <NUM>. Furthermore, the first opening segment <NUM> of the first tightly-attached section <NUM> is exposed on the opening inner surface <NUM>, and the second tightly-attached section <NUM> is not exposed on the opening inner surface <NUM>.

<FIG> is a partially cross-sectional view of a delaminatable container <NUM> according to the 2nd embodiment of the present disclosure. With reference to <FIG>, a delaminatable container <NUM> has a main body portion <NUM> and an opening portion <NUM>. The opening portion <NUM> is located closer to an opening <NUM> of the delaminatable container <NUM> than the main body portion <NUM> located thereto. An accommodation space <NUM> of the delaminatable container <NUM> is formed by a body inner surface <NUM> of the main body portion <NUM> and an opening inner surface <NUM> of the opening portion <NUM>. The delaminatable container <NUM> includes a first layer <NUM> and a second layer <NUM>. The first layer <NUM> includes a first tightly-attached section <NUM>. At the main body portion <NUM>, the first layer <NUM> is located closer to the body inner surface <NUM> than the second layer <NUM> located thereto and is exposed on the body inner surface <NUM>. The second layer <NUM> includes a second tightly-attached section <NUM>. The first tightly-attached section <NUM> and the second tightly-attached section <NUM> are tightly attached to each other. The first tightly-attached section <NUM> and the second tightly-attached section <NUM> are both located at the opening portion <NUM> of the delaminatable container <NUM> and form an inwardly folded structure <NUM>.

The first tightly-attached section <NUM> includes a sandwiched segment <NUM>. The second tightly-attached section <NUM> includes an inner tightly-attached segment <NUM> and an outer tightly-attached segment <NUM>. An inner surface <NUM> of the sandwiched segment <NUM> and the inner tightly-attached segment <NUM> are tightly attached to each other. An outer surface <NUM> of the sandwiched segment <NUM> and the outer tightly-attached segment <NUM> are tightly attached to each other. There may be an air gap (reference number omitted) existed in or not in the sandwiched segment <NUM>. The inner tightly-attached segment <NUM> is located closer to the opening inner surface <NUM> than the sandwiched segment <NUM> located thereto and is exposed on the opening inner surface <NUM>, and the sandwiched segment <NUM> is not exposed on the opening inner surface <NUM>. Furthermore, an inner diameter of the opening inner surface <NUM> becomes smaller along a direction from the opening <NUM> towards the main body portion <NUM>.

The second tightly-attached section <NUM> further includes a second opening segment <NUM>. The second opening segment <NUM> is exposed on the opening inner surface <NUM> and extended along the direction from the opening <NUM> towards the main body portion <NUM>. Accordingly, in the manufacturing process of the delaminatable container <NUM>, a part of a first layer and a part of a second layer of a blank of the delaminatable container <NUM> are pulled inwardly together by an outer wall of a blowing pin and folded inwardly along an opening inner surface (i.e., an inner surface at or near an opening of the blank), so that the first layer and the second layer of the blank (i.e., an inner layer and an outer layer of the blank) are tightly attached to enlarge the contact area and the friction therebetween. Thus, the second layer <NUM> of the delaminatable container <NUM> after molding is exposed on the opening inner surface <NUM> at a position of the opening <NUM>, and the first layer <NUM> and the second layer <NUM> are uneasy to peel off at the opening portion <NUM>.

Furthermore, the sandwiched segment <NUM> and the inner tightly-attached segment <NUM> are tightly attached to each other, and the sandwiched segment <NUM> is not exposed on the opening inner surface <NUM>. The second opening segment <NUM> is connected to the inner tightly-attached segment <NUM>. Therefore, it is beneficial to implement the inwardly folded structure <NUM>, which is formed by the first layer and the second layer folded inwardly together of the blank of the delaminatable container <NUM>.

Specifically, the second tightly-attached section <NUM> includes the inner tightly-attached segment <NUM>, the second opening segment <NUM> and the outer tightly-attached segment <NUM> in order along a direction from the opening inner surface <NUM>, via the opening <NUM> towards an opening outer surface <NUM>. That is, the inner tightly-attached segment <NUM>, the second opening segment <NUM> and the outer tightly-attached segment <NUM> of the second tightly-attached section <NUM> cover inwardly and outwardly the sandwiched segment <NUM> of the first tightly-attached section <NUM>, and are connected near an end of the sandwiched segment <NUM> which is farther from the main body portion <NUM>. The first tightly-attached section <NUM> and the second tightly-attached section <NUM> form the inwardly folded structure <NUM>, which may be formed by inwardly folding together of the first layer and the second layer of the blank of the delaminatable container <NUM>. Furthermore, the second opening segment <NUM>, the inner tightly-attached segment <NUM> of the second tightly-attached section <NUM> and the first tightly-attached section <NUM> are exposed on the opening inner surface <NUM> in order along the direction from the opening <NUM> towards the main body portion <NUM>.

<FIG> is a partially cross-sectional view of a delaminatable container <NUM> according to the 3rd embodiment of the present disclosure. With reference to <FIG>, a delaminatable container <NUM> has a main body portion <NUM> and an opening portion <NUM>. The opening portion <NUM> is located closer to an opening <NUM> of the delaminatable container <NUM> than the main body portion <NUM> located thereto. An accommodation space <NUM> of the delaminatable container <NUM> is formed by a body inner surface <NUM> of the main body portion <NUM> and an opening inner surface <NUM> of the opening portion <NUM>. The delaminatable container <NUM> includes a first layer <NUM> and a second layer <NUM>. The first layer <NUM> includes a first tightly-attached section <NUM>. At the main body portion <NUM>, the first layer <NUM> is located closer to the body inner surface <NUM> than the second layer <NUM> located thereto and is exposed on the body inner surface <NUM>. The second layer <NUM> includes a second tightly-attached section <NUM>. The first tightly-attached section <NUM> and the second tightly-attached section <NUM> are tightly attached to each other. The first tightly-attached section <NUM> and the second tightly-attached section <NUM> are both located at the opening portion <NUM> of the delaminatable container <NUM> and form an inwardly folded structure <NUM>.

The first tightly-attached section <NUM> includes a sandwiched segment <NUM>. The second tightly-attached section <NUM> includes an inner tightly-attached segment <NUM> and an outer tightly-attached segment <NUM>. An inner surface <NUM> of the sandwiched segment <NUM> and the inner tightly-attached segment <NUM> are tightly attached to each other. An outer surface <NUM> of the sandwiched segment <NUM> and the outer tightly-attached segment <NUM> are tightly attached to each other. The inner tightly-attached segment <NUM> is located closer to the opening inner surface <NUM> than the sandwiched segment <NUM> located thereto and is exposed on the opening inner surface <NUM>, and the sandwiched segment <NUM> is not exposed on the opening inner surface <NUM>. Furthermore, an inner diameter of the opening inner surface <NUM> becomes smaller along a direction from the opening <NUM> towards the main body portion <NUM>.

The second tightly-attached section <NUM> further includes a second opening segment <NUM>. The second opening segment <NUM> is exposed on the opening inner surface <NUM> and extended along the direction from the opening <NUM> towards the main body portion <NUM>. The second opening segment <NUM> is connected to the inner tightly-attached segment <NUM>.

Specifically, the second tightly-attached section <NUM> includes the inner tightly-attached segment <NUM>, the second opening segment <NUM> and the outer tightly-attached segment <NUM> in order along a direction from the opening inner surface <NUM>, via the opening <NUM> towards an opening outer surface <NUM>. That is, the inner tightly-attached segment <NUM>, the second opening segment <NUM> and the outer tightly-attached segment <NUM> of the second tightly-attached section <NUM> cover inwardly and outwardly the sandwiched segment <NUM> of the first tightly-attached section <NUM>, and are connected near an end of the sandwiched segment <NUM> which is farther from the main body portion <NUM>. The first tightly-attached section <NUM> and the second tightly-attached section <NUM> form the inwardly folded structure <NUM>, which may be formed by inwardly folding together of a first layer and a second layer of a blank of the delaminatable container <NUM>. Furthermore, the second opening segment <NUM>, the inner tightly-attached segment <NUM> of the second tightly-attached section <NUM> and the first tightly-attached section <NUM> are exposed on the opening inner surface <NUM> in order along the direction from the opening <NUM> towards the main body portion <NUM>.

<FIG> is a partially cross-sectional view of a delaminatable container <NUM> according to the 4th embodiment not being part of the present invention. With reference to <FIG>, a delaminatable container <NUM> has a main body portion <NUM> and an opening portion <NUM>. The opening portion <NUM> is located closer to an opening <NUM> of the delaminatable container <NUM> than the main body portion <NUM> located thereto. An accommodation space <NUM> of the delaminatable container <NUM> is formed by a body inner surface <NUM> of the main body portion <NUM> and an opening inner surface <NUM> of the opening portion <NUM>. The delaminatable container <NUM> includes a first layer <NUM> and a second layer <NUM>. The first layer <NUM> includes a first tightly-attached section <NUM>. At the main body portion <NUM>, the first layer <NUM> is located closer to the body inner surface <NUM> than the second layer <NUM> located thereto and is exposed on the body inner surface <NUM>. The second layer <NUM> includes a second tightly-attached section <NUM>. The first tightly-attached section <NUM> and the second tightly-attached section <NUM> are tightly attached to each other. The first tightly-attached section <NUM> and the second tightly-attached section <NUM> are both located at the opening portion <NUM> of the delaminatable container <NUM> and form an inwardly folded structure <NUM>.

The first tightly-attached section <NUM> includes a sandwiched segment <NUM>. The second tightly-attached section <NUM> includes an inner tightly-attached segment <NUM> and an outer tightly-attached segment <NUM>. An inner surface <NUM> of the sandwiched segment <NUM> and the inner tightly-attached segment <NUM> are tightly attached to each other. An outer surface <NUM> of the sandwiched segment <NUM> and the outer tightly-attached segment <NUM> are tightly attached to each other. Thus, the first tightly-attached section <NUM> (i.e., the sandwiched segment <NUM> thereof) and the second tightly-attached section <NUM> (i.e., the inner tightly-attached segment <NUM> and the outer tightly-attached segment <NUM> thereof) can have larger contact area so as to increase the friction. There may be an air gap (reference number omitted) existed in or not in the sandwiched segment <NUM>. The sandwiched segment <NUM> is exposed on the opening inner surface <NUM>, and the inner tightly-attached segment <NUM> and the outer tightly-attached segment <NUM> are not exposed on the opening inner surface <NUM>. Furthermore, an inner diameter of a position closer to the opening <NUM> of the opening inner surface <NUM> is greater than an inner diameter of a position farther from the opening <NUM> of the opening inner surface <NUM>.

The second tightly-attached section <NUM> further includes a second opening segment <NUM>. The second opening segment <NUM> is exposed on the opening inner surface <NUM> and extended along the direction from the opening <NUM> towards the main body portion <NUM>. The second opening segment <NUM> is connected to the outer tightly-attached segment <NUM>.

Specifically, the outer tightly-attached segment <NUM> and the inner tightly-attached segment <NUM> of the second tightly-attached section <NUM> cover inwardly and outwardly the sandwiched segment <NUM> of the first tightly-attached section <NUM>, and are connected near an end of the sandwiched segment <NUM> which is closer to the main body portion <NUM>. The first tightly-attached section <NUM> and the second tightly-attached section <NUM> form the inwardly folded structure <NUM>, which may be only formed by inwardly folding of a first layer of a blank of the delaminatable container <NUM>. Furthermore, the second opening segment <NUM> of the second tightly-attached section <NUM> and the sandwiched segment <NUM> of the first tightly-attached section <NUM> are exposed on the opening inner surface <NUM> in order along the direction from the opening <NUM> towards the main body portion <NUM>.

<FIG> is a partially cross-sectional view of a delaminatable container <NUM> according to the 5th embodiment not being part of the present invention. With reference to <FIG>, a delaminatable container <NUM> has a main body portion <NUM> and an opening portion <NUM>. The opening portion <NUM> is located closer to an opening <NUM> of the delaminatable container <NUM> than the main body portion <NUM> located thereto. An accommodation space <NUM> of the delaminatable container <NUM> is formed by a body inner surface <NUM> of the main body portion <NUM> and an opening inner surface <NUM> of the opening portion <NUM>. The delaminatable container <NUM> includes a first layer <NUM> and a second layer <NUM>. The first layer <NUM> includes a first tightly-attached section <NUM>. At the main body portion <NUM>, the first layer <NUM> is located closer to the body inner surface <NUM> than the second layer <NUM> located thereto and is exposed on the body inner surface <NUM>. The second layer <NUM> includes a second tightly-attached section <NUM>. The first tightly-attached section <NUM> and the second tightly-attached section <NUM> are tightly attached to each other. The first tightly-attached section <NUM> and the second tightly-attached section <NUM> are both located at the opening portion <NUM> of the delaminatable container <NUM> and form an inwardly folded structure <NUM>.

The first tightly-attached section <NUM> includes a sandwiched segment <NUM>. The second tightly-attached section <NUM> includes an inner tightly-attached segment <NUM>. An inner surface <NUM> of the sandwiched segment <NUM> and the inner tightly-attached segment <NUM> are tightly attached to each other. An outer surface <NUM> of the sandwiched segment <NUM> and the second tightly-attached section <NUM> may have an air gap (reference number omitted) existed therebetween, or may be tightly attached to each other. The sandwiched segment <NUM> is exposed on the opening inner surface <NUM>, and the inner tightly-attached segment <NUM> is not exposed on the opening inner surface <NUM>. Furthermore, an inner diameter of a position closer to the opening <NUM> of the opening inner surface <NUM> is greater than an inner diameter of a position farther from the opening <NUM> of the opening inner surface <NUM>.

Specifically, the first tightly-attached section <NUM> and the second tightly-attached section <NUM> form the inwardly folded structure <NUM>, which may be only formed by inwardly folding of a first layer of a blank of the delaminatable container <NUM>. The second opening segment <NUM> of the second tightly-attached section <NUM> and the sandwiched segment <NUM> of the first tightly-attached section <NUM> are exposed on the opening inner surface <NUM> in order along the direction from the opening <NUM> towards the main body portion <NUM>.

<FIG>, <FIG> and <FIG> are partially cross-sectional views of delaminatable containers <NUM> according to the 6th, 7th and 8th embodiments, respectively, not being part of the present invention. With reference to each of <FIG>, a delaminatable container <NUM> has a main body portion <NUM> and an opening portion <NUM>. The opening portion <NUM> is located closer to an opening <NUM> of the delaminatable container <NUM> than the main body portion <NUM> located thereto. An accommodation space <NUM> of the delaminatable container <NUM> is formed by a body inner surface <NUM> of the main body portion <NUM> and an opening inner surface <NUM> of the opening portion <NUM>. The delaminatable container <NUM> includes a first layer <NUM> and a second layer <NUM>. The first layer <NUM> includes a first tightly-attached section <NUM>. At the main body portion <NUM>, the first layer <NUM> is located closer to the body inner surface <NUM> than the second layer <NUM> located thereto and is exposed on the body inner surface <NUM>. The second layer <NUM> includes a second tightly-attached section <NUM>. The first tightly-attached section <NUM> and the second tightly-attached section <NUM> are tightly attached to each other. The first tightly-attached section <NUM> and the second tightly-attached section <NUM> are both located at the opening portion <NUM> of the delaminatable container <NUM>.

Claim 1:
A delaminatable container (<NUM>), having a main body portion (<NUM>) and an opening portion (<NUM>), wherein the opening portion (<NUM>) is located closer to an opening (<NUM>) of the delaminatable container (<NUM>) than the main body portion (<NUM>) located thereto, an accommodation space (<NUM>) of the delaminatable container (<NUM>) is formed by a body inner surface (<NUM>) of the main body portion (<NUM>) and an opening inner surface (<NUM>) of the opening portion (<NUM>), and the delaminatable container (<NUM>) comprises:
a first layer (<NUM>) comprising a first tightly-attached section (<NUM>); and
a second layer (<NUM>), wherein at the main body portion (<NUM>), the first layer (<NUM>) is located closer to the body inner surface (<NUM>) than the second layer (<NUM>) located thereto and is exposed on the body inner surface (<NUM>), the second layer (<NUM>) comprises a second tightly-attached section (<NUM>), and the first tightly-attached section (<NUM>) and the second tightly-attached section (<NUM>) are tightly attached to each other;
wherein the first tightly-attached section (<NUM>) and the second tightly-attached section (<NUM>) are both located at the opening portion (<NUM>) of the delaminatable container (<NUM>);
characterized in that the second tightly-attached section (<NUM>) comprises a second opening segment (<NUM>), and the second opening segment (<NUM>) is exposed on the opening inner surface (<NUM>) and extended along a direction from the opening (<NUM>) towards the main body portion (<NUM>),
the first tightly-attached section (<NUM>) comprises a sandwiched segment (<NUM>), the second tightly-attached section (<NUM>) further comprises an inner tightly-attached segment (<NUM>), the sandwiched segment (<NUM>) and at least one part of the inner tightly-attached segment (<NUM>) are tightly attached to each other, the sandwiched segment (<NUM>) is not exposed on the opening inner surface (<NUM>), and the second opening segment (<NUM>) is connected to the inner tightly-attached segment (<NUM>).