JPH06239332A - Multi-layer container - Google Patents

Abstract

PURPOSE:To consistently protect the contents in a container from the outside environment during the use from the beginning to the last end by the external container so that the internal container is contracted along the centerline thereof in accordance with the used extent. CONSTITUTION:The external container 1 is made of polypropylene with high moisture-proofing and water-proofing properties. On the other hand, the inner container 2 is made of a functional membrane in which a highly gas-insulating ethylene-vinylalcohol copolymer is interposed and stuck in low density polyethylene having moisture-proofing, water-proofing and oil-proofing properties as well for lamination thereof. Adhesive layers are not provided between the external and internal containers to enable easy separation from each other with a weak external force. In this way, since the inner and outer layers are separated by rotating a fixed ring 3a joined to the extended inner layers of the opening flanges 6, 7, the ambient air equivalent to the consumed volume of the contents can compensate it from the air vent 8. Accordingly, the protective function of the contents is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-layer container made of a thermoplastic resin, and more specifically to prevent the intake of air from the mouth while maintaining the outer shape of the container and to pour out necessary container contents. The present invention relates to a multi-layer container which is capable of being excellent in various properties such as oxidation resistance, moisture resistance, water resistance, gas barrier property, aroma retaining property for a substance contained in the container, and improvement of deterioration due to light rays.

[0002]

2. Description of the Related Art Conventionally, as containers for containing foods, cosmetics, detergents, medicines and the like, single-layer or multi-layer wall containers which are composed of a thermoplastic resin and are difficult to separate are widely used.
These containers take an extremely wide variety of forms depending on the intended use, and their manufacturing methods are also diverse. The aging step in which the substance contained in the container is put to use spans each stage of production, filling, transportation, consumption, etc., and the mechanical strength, moisture resistance, water resistance, and gas barrier required according to each stage. Since the container has various properties such as chemical resistance, chemical resistance, squeeze resistance, ambiguity preservation, light resistance, etc., the contained substance is protected from the external environment until just before it is consumed by the consumer. Has become.

A single layer container made of a thermoplastic resin such as various polyolefins, polyamides, polyvinyl chlorides, polyethylene terephthalates, and polycarbonates is provided on the container wall of these containers, and a peeling layer is provided through an adhesive layer made of a combination of these resins. Each single layer by sandwiching or coating a resin or metal with high gas barrier properties such as ethylene / vinyl alcohol copolymer resin, polyamide, polyvinylidene chloride, aluminum foil, etc. between the multi-layered wall container or a combination of these layers. As a result, a high-performance container with excellent mechanical strength, moisture resistance, water resistance, gas barrier property, chemical resistance, squeeze property, preservation of ambience, etc. can be obtained until just before opening and unsealing. However, it is.

[0004]

However, the conventional container group exhibits a desired desired performance in a state where the substance contained in the container is sufficiently filled and hermetically sealed, but once the container is opened and unsealed. It was not possible to deal with the oxidation of outside air and bacteria, the diffusion of useful components, the absorption of moisture, and the deterioration due to the intake of the used amount of intake air according to the use of the contained substance.

In particular, a liquid substance, such as edible oil, is stirred by the outside air intruding from the mouth every time it is used, and air bubbles are generated, so that not only the liquid surface in the liquid but also the adhered layer on the inner wall surface of the space for use is oxidized and deteriorated. Therefore, the quality will be deteriorated.
Also, not only liquid substances but also viscous substances, such as sauces and ketchups, are inhaled from the mouth due to the elasticity of the container each time they are used and deteriorate in quality due to oxidative moisture absorption deterioration as in the above. become.

Further, in a flexible container such as a squeeze container used for mayonnaise or the like, the flexibility of the container due to the use of the content substance loses the complementarity with the content substance and a seat is formed in the middle of the container. I succumbed and became unable to stand upright,
Moreover, due to the viscosity of the content substance, the phenomenon that the content substance stays in the bottom side part occurs, and in order to prevent these phenomena, the outside air is intentionally allowed to flow into the container and then inverted by various methods to the mouth part. While the content substance is collected and the buckling is corrected, the oxidative moisture absorption deterioration of the content substance is promoted.

Further, in the field where the volatile component is used in the contained substance, for example, in the case of using the contained substance in the ingredients such as kneaded wasabi, liquor, and perfume, the reduced amount is inhaled due to the elasticity of the container wall and is sucked. Volatile components stay in the air and are scattered into the atmosphere when reused, resulting in a significant deterioration in quality.

Further, in the case of a tube container for cosmetics, toothpaste, etc., not only can the air be inhaled in the same manner as described above even after the content substance has been used to some extent, but the content substance may scatter due to vomiting at the time of reuse, so cleaning If you wear clothes, it will cause stains and will be extremely troublesome. Furthermore, every time you squeeze, a retrograde flow to the mouth occurs,
In order to improve this, efforts are being made to attach a clip or the like from the bottom and gradually move it toward the head to facilitate squeezing with one hand and prevent inhalation from the mouth.

[0009] In a transparent container that can improve the commercial property by seeing the contents and can confirm the remaining amount of the contents, it is recommended to store in a dark place in order to avoid denaturation of the contents by external light. However, in reality, this is not always possible, and the current situation is that no measures are taken to reduce the contradiction between improvement in product quality and product deterioration, except for some. In addition, when a paper pack of milk, liquor or the like is similarly inhaled, the content substance comes into contact with the outside air to cause oxidative moisture absorption deterioration. Further, due to the dew condensation on the inner surface of the container due to the temperature difference between the inside and the outside of the container, the concentration of the content substance changes.

As described above, the physical properties of various containers are either inevitably caused by inflow of outside air into the container due to the decrease of the content substance filled therein, or by intentionally injecting them to correct the physical properties. The external barrier property against the content substance will be almost satisfied before opening and opening the cap except for the photo-denaturation of the transparent container, but the internal barrier property after opening and opening will deteriorate. Rather, it is obvious that the protection against the inflowing air and its entrained substances and bacteria is equal to zero, and it must be said that it is vulnerable to oxidation, moisture absorption, deterioration, diffusion and the like. The present invention is intended to solve the above problems, the barrier property against various gases and liquids from the time of filling the container content substance is excellent as before, and this excellent barrier property of the container content substance is Even if the volume decreases due to use, the desired performance can continue to function until the end of use of the content substance by keeping the intake from the mouth to a minimum, and the transparent container can reduce the denaturation due to direct light. The purpose is to provide a molded container.

[0011]

The container according to the present invention comprises a multi-layer wall formed by blow molding of a thermoplastic resin tubular parison, and the inner and outer layers are easily peeled, and the easily peeled layers are separated from each other. From the interlayer ventilation hole on the head, the used amount of contents is ventilated from the outside, the appearance of the container is always retained and restored depending on the elasticity of the outer layer, and the inner layer container uses the contents in the outer layer container. The gist is to consistently protect the substance contained in the container from the external environment from the beginning to the end of use by shrinking along the center line of the container with the passage of time.

The interlayer vent holes in the multilayer container of the present invention are:
Obtained by the dynamic shape of the container head. That is, at least one or more container inward or outward protrusions communicating from the upper end to the lower end of the head of the container are integrally formed, and the inner layer extension of the mouth flange having the protrusion continuous with the protrusion is formed. The inner layer and the outer layer of the protrusion are separated by the rotation of the joined fixing ring or the inner layer joint of the lid, and the inner layer and the outer layer of the protrusion are separated from each other, and / or the inner layer plane and / or the outer layer plane of the inner layer, or the outer layer. A ventilation pipe is exposed between the outer protrusion of the inner layer and the inner protrusion of the inner layer, and a ventilation hole is formed between the lower plane of the inner layer extension of the flange and the outer layer protrusion of the flange. In addition, it is possible to form a vent hole that communicates from the outer surface of the outer layer to the inner surface in the mold at the time of molding and / or by heat cutting after molding, but there is a risk of damaging the inner layer and accuracy during blow molding. A stable supply of high outer layer thickness is required.

Further, while the protrusion corresponding to the vent hole portion below the inner layer extension moves on the outer layer flange at the time of the above-mentioned rotation, the inner layer corresponding to the vertical diameter of the protrusion is lifted and vertically moved, and further, the rotating direction. When the inner layer is twisted, the inner and outer layers are clearly separated.

The container wall of the present invention is divided into inner and outer layers, which are closely adhered at the time of molding and filling and separated at the time of use of the contents. The inner layer is mainly a functional film, that is, excellent moisture resistance, It is composed of a single layer or multi-layered film that has water resistance, gas barrier property, chemical resistance, organic solvent resistance, flavor preservability, etc., and has a layer thickness that flexes as the contents of the container decrease, and its function The property is adopted by combining the resin functions according to the various performance requirements of the container contents. In addition, the outer layer retains the container form and has the strength necessary to support each stage of manufacturing, filling, transportation, consumption, etc., and the layer thickness that has an indirect protection function for the inner layer and the substance contained in the container. The multi-layer structure for improving the commercial property is designed within the range of its strength and function.

The above-mentioned separated layers do not have strong bonding as in the prior art, but have a close-bonding structure capable of easily peeling by weak bonding or a small external force. It turns out that this is reasonably obtained in the following example. That is, a parison is formed by melt-extruding polyethylene and polypropylene, which are polyolefin-based resins, and the container walls of the container obtained through the steps of split mold clamping and blowing are in a close contact state without being fused, and one resin is bonded to the other resin. Is 20% or less, preferably 10% or less, a weak bond results. Further, by polymerizing polypropylene glycol in polyethylene to 0.4% or less, preferably 0.2% or less, stability and adhesion between layers can be improved. As described above, by molding by coextrusion between different kinds of resins other than the resin having a polar group without using an adhesive resin between different kinds of resins, it is possible to obtain a container in which the layers are easily peeled off.

Interlayer aeration is started by pouring out the substance contained in the container from the mouth. However, if the container is erected at the end of pouring, the amount of the substance contained in the container will be lowered and the elasticity of the container wall will make the amount smaller than before. However, since intake air is involved, it is possible to block intake air and smooth inter-layer ventilation by mounting the valve element on the fixed ring. Further, it is also possible to install a valve body attached to the lid part that fits or adheres to the fixing ring, and the filling operation of the content substance before fitting can be facilitated.

By assembling the spout of the container, the valve body, and the interlayer ventilation hole in the lid part fitted to the head, hygiene, airtightness, transportation safety, and ease of use can be obtained. In addition, interlayer aeration may be performed at the time when the container content substance is poured out from the mouth and the valve body is closed, and in order to prevent any content residue from entering or blocking the vent hole, The performance of the container is stabilized by providing the partition wall between the ventilation holes. Further, the convenience is increased by fitting the upper and lower parts to each other while providing a divided function and fixing the lower part to the container and connecting the upper part to the inner layer for rotation.

Since the inner layer shrinks in the container following the decrease of the content substance, at the head, the inner layer extended portion is joined to the fixing ring at the mouth flange, and at the bottom of the container, the inner and outer layers formed by pinch-off are formed. By being connected to each other by the fixing portions, the container does not drop out and bends along the center line of the container while ensuring the flow path of the content substance, so that the center of gravity of the container is always kept low and stable.

[0019]

In the container according to the present invention, the inner layer joined to the fixing ring is rotated at the head by the separating action of the inner layer having both barrier property and flexibility and the outer layer having both container shape holding strength and indirect barrier property. Vent pipe part and vent hole are formed by the outside, and the outside volume of the body part compensates for the decrease due to the use of the substance inside the container due to the inflow of outside air from the vent hole. It will follow the object and produce a contracting action. Depending on the substance contained in the container, due to its own downflow pressure and the elasticity of the container, air is taken in from the mouth, so by installing a valve at the mouth, the intake action is blocked and the substance is protected. . As the contents of the container decrease, the inner layer gradually loses its complementarity due to the adhesiveness with the outer layer and becomes suspended from the head, so that the inner layer extension of the mouth flange is fixed by the fixing ring or the extension joint of the lid. It is connected and prevented from falling off. In addition, since two inner and outer layer joints are formed by pinch-off at the bottom of the container, the inner layer shrinks vertically as a flexible container inner container along the center line of the container, and the substance contained in the container is at the bottom of the container. Since it is present, it always acts on the stabilization of the center of gravity of the container, and a flow path is secured when the contents are used.

As described above, the shape of the container has the function of maintaining and restoring the contents from the beginning of use, and the contact of the air with the substances contained in the container is minimized. The quality can be maintained from the start of use to the end of use.

[0021]

Embodiments of the container according to the present invention will now be described in detail with reference to the drawings. FIG. 1 and FIG. 2 are central longitudinal side views showing one embodiment of the multilayer molded container of the present invention, and FIGS. 3 and 5 are partially enlarged heads showing one embodiment of the multilayer molded container of the present invention. The front view, FIG. 4 and FIG. 6 are enlarged cross-sectional views of the respective heads. 7 and 8 are partially enlarged sectional views showing an embodiment of the fitting lid portion provided in the spout portion of the present invention. In FIG. 1, reference numeral 11 is a multilayer wall container formed by blow molding a tubular parison by coextrusion, and reference numeral 5 is a spout. The outer layer indicated by reference numeral 1 is made of polypropylene having high moisture resistance and water resistance, and the inner layer indicated by reference numeral 2 is ethylene vinyl having low moisture density, water resistance, and oil resistance, and low gas density polyethylene and high gas barrier property. It is composed of a functional film multilayered by sandwiching and adhering an alcohol copolymer resin. No adhesive layer is interposed between the inner and outer layers, and the inner and outer layers are easily peeled with a small external force.

In FIGS. 1 and 2, reference numerals 6 and 7 are mouth flanges, and the flat portion of the inner ring extension has a flat portion of the fixing ring 3a and the concave portion has a lower portion of the fixing ring 3b. The protrusion is glued. The convex portion of the reference numeral 3c above the fixing ring is fitted into the concave portion of the valve body supporting portion of the reference numeral 16 which is connected to the valve body of the reference numeral 15, and the fixing ring is rotated by twisting the valve body supporting portion. By rotating, the vent hole of reference numeral 8 appears, and at the same time, the inner layer of the container head clearly starts to separate from the outer layer toward the shoulder portion of the container.

In FIG. 3, FIG. 4, FIG. 5, FIG. 6 and FIG.
Reference numeral b denotes a protrusion below the flange which is continuous with the protrusion and which is also shared by the inner and outer layers. This continuous protrusion rotates as the inner ring of the head separates from the outer layer over the entire surface as the fixing ring joined to the inner layer extension of the mouth flange rotates, and at this point, each shared protrusion is unique. Turning to the protrusions, the protrusions of the outer layer will create vent holes and vent pipes, shown at 8, surrounded by the outer surface of the inner layer. On the other hand, a space is also created on both sides of the tip of the moved inner layer to form an auxiliary vent hole. The projection of the inner layer extension contacts the projection end of the projection on the outer layer flange as the fixing ring to which it joins rotates, and separates the inner and outer layers of the projection in the longitudinal direction into upper and lower parts. Further, as the inner layer moves from the neck to the upper end of the trunk as the rotation progresses, the inner and outer layers are clearly separated from each other by the attractive force that is obliquely upward due to the twisting of the head, and the air holes that appear between the unevenness of the inner and outer layers Aeration is performed and easy peeling is started without affecting the outer shape of the container. With this easy peeling as a trigger, the easy peeling is repeated each time the substance is used, and the process reaches the joint portion 10a, 10b in FIG.

FIGS. 7 and 8 show an embodiment in which a fitting lid is attached, and FIG. 7 shows a closed state of the vent hole, and FIG.
The figure shows a state in which the ventilation hole is opened by rotating the fixing ring by 45 °. Reference numeral 1 indicates an outer layer and reference numeral 2 indicates an inner layer. Code 3
a, 3b, and 3c are integrally formed fixing rings, and FIG. 7 shows a state in which the protrusions of the inner and outer layers to be ventilation holes are filled, and FIG. 8 shows the flat portion of the fixing ring due to the rotation of the fixing ring. Indicates that the space above the protrusion of the outer layer and the ring protrusion and the space of reference numeral 8 corresponding to the longitudinal length of the inner layer thickness are generated. Reference numeral 21 is a fitting lid fixed body of the container, and reference numeral 22
Is a moving space, reference numeral 23 is a fitting lid moving body that is fitted to the outer circumference of the fixed body 21 and can move vertically and horizontally on the circumference, reference numeral 2
Reference numeral 5 is an intake cutoff valve, reference numeral 29 is its support portion, reference numeral 27.
Is a ventilation hole communicating with the ventilation hole of the container body, and reference numeral 28 is a partition wall. Reference numeral 24 is a lid drop-off preventing groove. Further, although not shown, a protrusion that communicates vertically is provided between the intermittent male screws so that the male screw and the lid can be fixed without hindering the opening of the ventilation hole.

Further, although not shown, at the head of the container,
An intermittent male screw in which the upper and lower ends are aligned is formed, and a protrusion having a diameter smaller than that of the male screw communicating from the mouth to the lower end of the head is formed between the male screws to fit the lid having the female screw. be able to. Further, depending on the contents of the container, the opening / closing of the ventilation hole is performed at the time of opening / uncapping, so that the convenience is improved. Since the projections provided on the outer side of the reference numeral 3a or 3b and the inner side of the fitting lid portion come into contact with each other to open and close the ventilation hole when opening and closing the stopper, the fixing ring is interlocked when the lid portion is attached or detached or the opening and closing stopper is opened. It will rotate. By allowing the interlayer vents to open and close at the same time as the opening and closing and / or closing and closing operations, direct contact with the fingers and other parts around the mouth of the container is avoided, and convenience and hygiene are significantly improved. Become.

The inner layer of reference numeral 2 is adhered or bonded to the bottom surfaces of the reference numerals 3a and 3b of the fixing ring at the container opening portion, and at the bottom portion of the container, reference numerals 10a and 10b of FIG.
As shown in FIG. 3, both ends of the weld portion, which are caused by melting of the parison at the time of mold clamping, are sharply engaged with each other in the inner and outer layers to be joined. Since these are fixed at the mouth and the bottom, the inner layer of reference numeral 2 naturally contracts in a vertical strip along the center line of the container in the outer layer container of reference numeral 1 along with the use of the filling material, thereby forming an inner container. Will work. Conventionally, the outside air associated with intake air is clearly separated and stored between the separated inner and outer layers, and the substance contained in the container is used with the influence of the outside air kept to a minimum from the time of filling to the end of use.

Although not shown, as another embodiment, for example, in the case of a tubular container, the inner and outer layers for forming the vent holes are formed by the inner and outer layers separately from the method of this embodiment. After blow molding into the same shape, insert and combine by utilizing the flexibility of the inner layer extension, or form the outer layer body into a cylindrical shape and / or form the inner layer body into a cylindrical shape and inject each end It is possible to adopt a method in which the head portion is inserted into a molding die, injection-molded, and the heads are fusion-bonded to be united. In any of the above methods, the inner layer of the head can be rotated, and the procedure of opening and closing or opening and closing the vent hole can be adopted according to the property of the container-containing substance and the required squeeze performance.

Further, in the case of a paper pack-shaped container, when the inner layer of the container and the inner layer of the cap are formed by fusion bonding, the inner layer cap and the outer layer cap fitted to the inner layer are joined to each other in the container. A gap is provided, and an inner / outer interlayer ventilation hole is opened between the gaps. The inside of the inner layer cap is divided into a pouring portion and an interlayer ventilation portion, a ventilation hole is opened in the side surface of the cap, and the opening portion on the side surface of the outer layer cap is also communicated by the rotation of the inner layer to perform interlayer ventilation. Further, the intake air is blocked by fitting or adhering the intake prevention valve body into the mouth of the container.

As described above, the method of forming the inner and outer layers differs depending on the type of the container, but is common for the intended purpose of the present invention. That is, in the container of the present invention,
As shown in FIG. 1, when the content substance filled in the inner layer of reference numeral 2 is taken out, the interlayer vent hole of reference numeral 8 is opened by the rotation of the inner layer of the container head as shown in FIGS. 1 and 5. Therefore, by the generation of this ventilation function, the outside air corresponding to the taken-out volume of the substance is filled between the inner and outer layers without touching the filling substance. The vent hole of reference numeral 8 is closed at each point in the production of the container, filling of the contents, transportation, sale, etc., so that the production workability and the protection function for the contents maintain the same convenience as before. become. The ventilation hole of the reference numeral 8 of the multi-layered container of the present invention is easily generated automatically or in an interlocking manner by twisting the lid portion with fingers in the same manner as in the conventional case when the consumer consumes the filling material. Due to the ventilation from the ventilation holes, the inner layer of reference numeral 2 shrinks following the decrease of the filler, while the outer layer of reference numeral 1 always maintains and restores the original shape. In addition, it is possible to freely select the opening and closing of the vent hole by the twisting direction when opening and / or closing the cap depending on the contact or joining state due to the shape of the fixing ring and the lid. Can be done. Further, in the case where the viscosity condition of the filling material of the container is accompanied by intake air after use, the filling material is protected from the contact with the outside air by providing the intake cutoff valve indicated by reference numeral 15 at the spout of the mouth portion. . Furthermore,
The inner ring is fixed up and down by the fixing ring joined to the inner layer extension of the mouth flange and the inner and outer layers connected by pinch-off at the bottom of the container, and along the center line of the container due to the easy peeling from the outer layer on the inner surface of the container. It can be contracted vertically.

[0030]

As described above, the multilayer container of the present invention is provided with a thermoplastic resin in which the interface between the inner and outer layers is in an easily peeled state to give the inner layer flexibility, and the flange of the container head. Forming at least one or more protrusions communicating from the upper end to the lower end, including the inner ring joint of the fixing ring or the lid joined to the inner layer extension of the mouth flange Are separated from each other and interlayer air holes are generated, and the inner and outer layers start to peel off clearly, so that outside air corresponding to the amount of the container filling substance used is supplemented from the generated air holes between the inner and outer layers. The filling substance can continuously avoid contact with outside air even after opening and opening. Further, by installing the intake cutoff valve at the spout, the protection against the filling substance is further improved. Since the material filled in the container is kept in contact with the outside air to a minimum even after the container is opened and unsealed, the quality can be maintained without being affected by oxidation and moisture absorption and deterioration due to intake from the mouth. Furthermore, since the vents and spouts are concentrated on the head, hygiene at each stage of distribution and consumption can be obtained as before, and the functional lid can be simply fitted. Therefore, the filling workability before fitting can be obtained as in the conventional case. In terms of the appearance of the container, the original shape is always maintained and restored regardless of the increase or decrease in the amount of the filling material, so even though the inner layer that adheres to the filling in the container shrinks vertically, some conventional containers The buckling phenomenon shown in Fig. 3 does not occur. The vent hole of the present invention is opened and closed by the rotation of the inner layer of the mouth portion and the joined body thereof, and the timing of the rotation can be freely selected depending on the viscosity of the container filling material and / or the convenience of pouring, and the protrusion. If one of the shapes is made obtuse and the other is made substantially acute, one-way rotation can be selected, and there is an advantage that it can be selectively used depending on the property of the filling substance and the usage situation.

[Brief description of drawings]

FIG. 1 is a central longitudinal side view showing an embodiment of a multilayer container of the present invention.

FIG. 2 is a central longitudinal side view showing an embodiment of the multilayer container of the present invention.

FIG. 3 is a partially enlarged front view showing an example of a state in which a vent hole of a protrusion provided on the head of the present invention is opened.

FIG. 4 is a partially enlarged cross-sectional view showing an embodiment of the opening state of the vent hole of the protrusion provided on the head of the present invention.

FIG. 5 is a partially enlarged front view showing an embodiment of the vent hole closed state of the protrusion provided on the head of the present invention.

FIG. 6 is a partial enlarged cross-sectional view showing an embodiment of the vent hole closed state of the protrusion provided on the head of the present invention.

FIG. 7 is a partially enlarged vertical side view showing an embodiment of a state in which a vent hole of a fitting lid portion provided in a spout portion of the present invention is closed.

FIG. 8 is a partially enlarged vertical cross-sectional side view showing an example of a state in which a vent hole is opened by rotating a fitting lid portion provided in a spout portion of the present invention.

[Explanation of symbols]

 1 Outer layer 2 Inner layer 3a Fixing ring 3b Fixing ring lower protrusion 3c Fixing ring upper protrusion 5 Pouring outlet 6 Inner layer extension of flange 7 Outer layer flange 7a Head outer protrusion 7b Flange lower protrusion 8 Vent hole 10a Bottom Joint part 10b Bottom joint part 11 Container body 15 Valve body 21 Container fixed body of lid part 22 Lid part moving space 23 Fitting lid part 24 Lid part drop prevention groove 25 Valve body of fitting lid part 26 Valve body stop 27 Lid vent hole 28 Lid inner partition wall 29 Valve body connecting part 30 Lid

Claims (8)

[Claims] 1. A container comprising a multilayer wall formed by blow molding of a thermoplastic resin tubular parison and in which the layers are easily separated, at least one or more communicating from the upper end including the flange of the head of the container to the lower end. The inner ring and outer layer of the protrusion are separated by the rotation of the fixing ring joined to the inner layer extension of the mouth flange or the inner layer joint of the lid to open and close as an interlayer vent hole at the top of the head. A multi-layer container characterized in that the layers between the shoulders are clearly separated. 2. The container mouth portion is provided with a fixing ring having a protrusion at an upper portion and / or a lower portion capable of joining and / or fitting the inner layer extension portion of the flange and the fitting lid portion or the valve body. The multilayer container according to claim 1. 3. At the container mouth, a valve body capable of pouring out the contents of the container and blocking the intake of air into the container is provided at the inner layer extension, the upper end of the fixing ring, or the mouth fitting body pouring part. The multi-layer container according to claim 1, wherein 4. A lid part integrally formed with a vent hole communicating with the vent hole of the container body adjacent to the outlet of the container contents at the mouth part of the container is bonded or fitted to the upper end part of the container. The multi-layer container according to claim 1, which is characterized in that. 5. In the container mouth portion, a part or residue of the contents closes or passes through the vent hole between the vent hole adjacent to the spout of claim 3 and after pouring the contents of the container. The multi-layer container according to claim 1, further comprising a partition wall that prevents the pores from entering the pores. 6. The lower part of the lid part fitted to the container is fixed to the container body, and the upper part fitted thereto is rotatable, and the rotating part is joined or fitted to the inner layer extension part or its mounting ring. The multi-layer container according to claim 1, wherein 7. A container head, in which intermittent male screws are formed, a protrusion having a lower length than that of the male screw communicating from the mouth portion to the lower end of the head is provided between the male screws, and the side of the fixing ring and The multi-layer container according to claim 1, wherein the vent hole is interlocked with the opening and closing of the lid portion when the lid portion is attached or detached or the opening and closing plug is brought into contact with the protrusion provided inside the fitting lid portion. 8. At the bottom of the container, the outer layer and the inner layer are joined by a joint formed by pinch-off, and at the head, the inner ring is detached by joining the fixing ring and the inner layer or the inner layer joint of the lid. The multilayer container according to claim 1, wherein the inner layer shrinks along the center line of the container while ensuring the flow path of the contents of the container.