JP6942429B2 - Laminate peeling container - Google Patents

Description

The present invention relates to a synthetic resin laminated stripping container formed by blow molding a preform assembly in which an inner preform is incorporated inside an outer preform.

By blow-molding a preform assembly that incorporates the inner preform inside the outer preform as a container for storing food seasonings such as soy sauce, beverages, cosmetics, shampoo, rinse, liquid soap, etc. as the content liquid. , Separated from the outer layer body having a tubular outer mouth portion and a bottomed tubular body portion connected to the outer mouth portion, and the tubular inner mouth portion and the inner surface of the body portion arranged inside the outer mouth portion. There is known a laminated peeling container (delamination container) made of synthetic resin formed in a double structure having an inner layer body provided with a volume-reducing and deformable accommodating portion that is laminated so as to be possible.

Such a laminated release container is used, for example, as a squeeze-type pouring container combined with a pouring cap equipped with a check valve, or a container with a pump combined with a pump, and squeezes the body of the outer layer body. The contents can be poured out by (squeezing) or operating the pump. On the other hand, after the content liquid is poured out, the outside air is introduced between the outer layer body and the inner layer body from the outside air introduction port provided in the outer layer body, so that the outer layer body is restored or maintained in its original shape and the inner layer body is maintained. It is possible to reduce the volume and deform only the accommodating part of. Therefore, according to the laminated stripping container, the content liquid contained in the accommodating portion of the inner layer body is discharged to the outside without being replaced with the outside air, and the outside air to the content liquid contained inside the inner layer body is discharged. It is possible to reduce contact and suppress deterioration and deterioration of the content liquid.

However, in the conventional laminated peeling container, since the preform assembly in which the inner preform is incorporated is blow-molded inside the outer preform, the inner layer is formed by high pressure and heat during blow molding. The outer surface of the accommodating part of the body is strongly adhered to the inner surface of the body part of the outer layer body, which increases the peeling resistance of the accommodating part to the body part, and there is a possibility that the accommodating part may have poor peeling when the content liquid is poured out. There was a problem that there was.

To solve such a problem, for example, as described in Patent Document 1, a laminated peeling container in which a mold release agent layer containing liquid paraffin is provided between the outer surface of the accommodating portion and the inner surface of the body portion has been proposed. There is.

Japanese Unexamined Patent Publication No. 2017-186059

However, even if a mold release agent layer containing liquid paraffin is provided between the outer surface of the accommodating portion and the inner surface of the body portion as in the laminated peeling container described in Patent Document 1, the body portion of the accommodating portion is provided. The peeling resistance could not be sufficiently reduced, and further improvement was required to solve the above problems.

Further, in the above-mentioned conventional laminated peeling container, in order to provide a mold release agent layer containing liquid paraffin between the outer surface of the accommodating portion and the inner surface of the body portion, the inner surface or the inner preform of the outer preform is provided. After applying a release agent containing liquid paraffin on the outer surface, it is necessary to incorporate the inner preform inside the outer preform. However, since the release agent containing liquid paraffin has fluidity and is applied to the inner surface of the outer preform or the outer surface of the inner preform in a wet state, it is inside the outer preform. When incorporating the preform, there is a risk that the release agent may drip or the thickness may become uneven, which causes a problem that the handling of the outer preform or the inner preform becomes complicated.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a laminated peeling container capable of sufficiently reducing the peeling resistance of the accommodating portion to the body portion and being easily manufactured. There is.

The laminated stripping container of the present invention is a synthetic resin laminated stripping container formed by blow-molding a preform assembly incorporating an inner preform inside the outer preform, and has a tubular outer mouth portion. An outer layer body having a bottomed tubular body portion connected to the outer opening portion, and a tubular inner opening portion arranged inside the outer opening portion and an inner surface of the body portion are releasably laminated. It has an inner layer body provided with a volume-reducing and deformable accommodating portion, and an outside air introduction port for introducing outside air between the outer layer body and the inner layer body, and has an inner surface of the body portion or the accommodating portion. A vapor-deposited film is provided on at least one of the outer surfaces of the above-mentioned, and the vapor-deposited film is dispersed in a large number of vapor-deposited film pieces .

In the laminated peeling container of the present invention, it is preferable that the outer layer body and the inner layer body are each made of polyethylene terephthalate resin in the above configuration.

In the laminated stripping container of the present invention, it is preferable that the vapor-deposited film is made of silicon oxide in the above configuration.

In the above-mentioned configuration, the laminated peeling container of the present invention is provided with an adhesive film formed of an organosilicon compound between the inner surface of the body portion on which the vapor-deposited film is provided or the outer surface of the accommodating portion and the vapor-deposited film. It is preferable that it is provided.

In the above-mentioned configuration, the laminated peeling container of the present invention preferably has the vapor-deposited film provided only on the inner surface of the body portion.

In the above-mentioned structure, the laminated peeling container of the present invention preferably has a thickness of the vapor-deposited film of 100 nm or more and 300 nm or less.

According to the present invention, it is possible to provide a laminated peeling container which can sufficiently reduce the peeling resistance of the accommodating portion to the body portion and can be easily manufactured.

It is a side view which shows the laminated peeling container which is one Embodiment of this invention by cutting out a part thereof. It is a top view of the laminated peeling container shown in FIG. It is sectional drawing of the part of the outer mouth part and the inner mouth part of the laminated peeling container shown in FIG. It is an enlarged view which shows the part of the inner surface of the body part shown in FIG. 1 enlarged. It is sectional drawing which follows the AA line in FIG. It is a side view which shows the preform assembly for forming the laminated peeling container shown in FIG. 1 by cutting out a part thereof. It is a side view which shows the outer preform shown in FIG. 6 by cutting out a part thereof.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

The laminated peeling container 1 according to the embodiment of the present invention shown in FIG. 1 is made of a synthetic resin, which is also called a delamination container (derami container), and has a double structure having an outer layer body 10 and an inner layer body 20. It has become. In the following, a case where the laminated peeling container 1 is used as a squeeze-type pouring container for containing a food seasoning such as soy sauce as a content liquid will be described.

In the present specification, claims and drawings, the vertical direction means the vertical direction in a state where the laminated peeling container 1 is in an upright position as shown in FIG. 1, and the radial direction is laminated. It is assumed to mean a direction that passes through the axis O of the peeling container 1 and follows a straight line perpendicular to the axis O.

The outer layer body 10 is a portion constituting the outer shell of the laminated peeling container 1, and has a bottle shape including an outer opening portion 11 and a bottomed cylindrical body portion 12 integrally connected to the lower end of the outer opening portion 11. ing.

As shown in FIGS. 1 and 2, the outer opening portion 11 has a cylindrical shape, and a male screw 11a is integrally provided on the outer peripheral surface thereof. A spout cap (not shown) provided with a spout by being screwed to a male screw 11a can be attached to the outer port portion 11.

The outer port portion 11 may be provided with an annular protrusion instead of the male screw 11a, and the injection cap may be attached by engaging with the protrusion in an undercut shape by a stopper. In this case, the outer opening portion 11 is not limited to a cylindrical shape, and may have a cylindrical shape, for example, a square tubular shape or an elliptical tubular shape.

The outer port portion 11 is provided with a pair of outside air introduction ports 13. Each of the pair of outside air introduction ports 13 has an elongated hole-shaped through hole that penetrates the outer port portion 11 in the radial direction and extends in the circumferential direction, and is symmetrical with each other on both sides of the axial center O of the outer port portion 11. Is located in. The pair of outside air introduction ports 13 communicate with each other between the outer layer body 10 and the inner layer body 20, and outside air can be introduced between the outer layer body 10 and the inner layer body 20 through these outside air introduction ports 13. ..

A neck ring 14 is integrally provided below the outside air introduction port 13 of the outer port portion 11. The neck ring 14 extends in an annular shape over the entire circumference of the outer opening portion 11, and projects outward from the outer peripheral surface of the outer opening portion 11 in the radial direction.

The body portion 12 has a shoulder portion 12a, a body portion 12b, and a bottom portion 12c.

The shoulder portion 12a is integrally connected to the lower end of the outer opening portion 11, and the diameter is gradually increased downward so as to project outward in the radial direction with respect to the outer opening portion 11. The body body portion 12b is formed in a cylindrical shape having a substantially circular cross section having a constricted portion, and is integrally connected to the lower end of the shoulder portion 12a at the upper end thereof. The bottom portion 12c is integrally connected to the lower end of the body portion 12b and closes the lower end of the body portion 12b. The bottom portion 12c has a shape in which the inside of the outer peripheral edge of the annulus is recessed, and the laminated peeling container 1 can be arranged in an upright posture by grounding the bottom portion 12c.

The body body 12b has flexibility and can be elastically deformed by being squeezed (squeezed) to be dented inward in the radial direction, and from the dented state to the original shape due to the elastic force. You can restore it by yourself. By making the body body portion 12b elastically deformable by squeezing, when the laminated peeling container 1 is used as a squeeze type pouring container, it is possible to easily perform the pouring operation of the content liquid. At the same time, the body body 12b is easily restored to its original shape after the content liquid is poured so that the outside air is surely introduced between the outer layer 10 and the inner layer 20 through the outside air introduction port 13. , The function as the laminated peeling container 1 can be surely exhibited.

A plurality of (18) concave ribs 15 extending in the vertical direction are provided on the shoulder portion 12a so as to be arranged at equal intervals over the entire circumference in the circumferential direction. In FIGS. 1 and 2, for convenience, only one concave rib 15 is designated by a reference numeral. By providing the shoulder portion 12a with the plurality of concave ribs 15, the inner layer body 20 can be easily separated from the outer layer body 10 at the portion of the shoulder portion 12a. It should be noted that the concave rib 15 may not be provided.

The inner layer body 20 has an inner opening portion 21 and an accommodating portion 22.

As shown in FIG. 3, the inner opening portion 21 has a cylindrical shape having a smaller diameter than the outer opening portion 11, and is arranged coaxially with the outer opening portion 11 inside the outer opening portion 11. A gap 23 at a predetermined interval is provided between the inner peripheral surface of the outer opening portion 11 and the outer peripheral surface of the inner opening portion 21. A diameter-expanding portion 24 is integrally provided at the upper end of the inner opening portion 21, and the outer peripheral surface of the diameter-expanding portion 24 comes into contact with the inner peripheral surface of the outer opening portion 11 over the entire circumference. The gap 23 between the mouth portion 11 and the inner mouth portion 21 is closed to the outside at the upper end portion of the outer mouth portion 11 or the inner mouth portion 21. A flange portion 25 extending outward in the radial direction is integrally provided at the upper end of the enlarged diameter portion 24, and the flange portion 25 abuts on the upper end of the outer opening portion 11 so that the inner opening portion 21 is relative to the outer opening portion 11. Is positioned in the axial direction.

The inner opening portion 21 is not limited to a cylindrical shape, and may be a tubular shape. For example, when the outer opening portion 11 is formed into a square cylindrical shape or an elliptical tubular shape, the square tubular shape or the elliptical shape is similarly formed. It can be formed in a tubular shape.

As shown in FIG. 1, the accommodating portion 22 is formed in a bag shape thinner than the body portion 12, is integrally connected to the lower end of the inner opening portion 21, and is detachably laminated on the inner surface of the body portion 12. The inside of the accommodating portion 22 is a storage space S for the content liquid, and the content liquid can be filled in the accommodating portion 22 through the inner mouth portion 21 and the content liquid is accommodated in the accommodating portion 22 through the inner mouth portion 21. Can be dispensed to the outside. The accommodating portion 22 can be deformed (deformed so as to reduce the internal volume) while being peeled from the inner surface of the body portion 12 as the content liquid is poured out. With the volume reduction deformation of the accommodating portion 22, outside air is introduced between the outer layer body 10 and the inner layer body 20 from the outside air introduction port 13, so that the body body portion 12b is maintained or restored to its original shape. Only the accommodating portion 22 can be easily peeled off from the inner surface of the body portion 12 to reduce the volume and deform.

As shown in FIG. 3, a vertical rib 26 is integrally provided on the outer surface of the inner layer body 20 in order to secure an airway for the outside air from the outside air introduction port 13 to the body portion 12 and the accommodating portion 22. ing. Although details are not shown, in the laminated peeling container 1 of the present embodiment, three vertical ribs 26 are formed around the outer surface of the inner layer body 20 in a predetermined range in the circumferential direction centered on one of the outside air introduction ports 13. In addition to being provided side by side at intervals in the direction, three vertical ribs 26 are provided side by side at intervals in the circumferential direction in a predetermined range in the circumferential direction centered on the other outside air introduction port 13. At least one of these vertical ribs 26 faces each outside air introduction port 13. Each of the vertical ribs 26 protrudes outward in the radial direction from the outer surface of the inner layer body 20 and extends from the inner opening portion 21 across the accommodating portion 22 in the direction along the axial center O to form the outer layer body 10 and the inner layer body 20. Between them, an outside air ventilation path is formed which extends from the outside air introduction port 13 beyond the neck ring 14 to a portion between the shoulder portion 12a and the accommodating portion 22. As a result, the ventilation path of the outside air introduced from the outside air introduction port 13 can be surely introduced into the space between the shoulder portion 12a and the accommodating portion 22.

The vertical rib 26 may be provided on the inner peripheral surface of the outer opening portion 11. Further, the vertical ribs 26 may not be provided on either the outer opening portion 11 or the inner opening portion 21.

Both the outer layer body 10 and the inner layer body 20 are made of polyethylene terephthalate resin (PET). By making the outer layer body 10 and the inner layer body 20 each made of polyethylene terephthalate resin, the laminated peeling container 1 can be made a lightweight and highly transparent container.

FIG. 4 is an enlarged view showing a part of the inner surface of the body portion 12 shown in FIG. 1 in an enlarged manner. As shown in FIG. 4, in order to reduce the peeling resistance of the accommodating portion 22 to the body portion 12, a large number of vapor-deposited film pieces as a vapor-deposited film are formed on the inner surface of the body portion 12 of the outer layer body 10. 30 are dispersedly provided. For convenience, only some of the vapor-deposited film pieces 30 are designated with reference numerals in FIG.

Each of these vapor-deposited film pieces 30 is a thin film piece formed by finely splitting the vapor-deposited film on the inner surface of the body portion 12, and the inner surface of the body portion 12 is spaced apart from each other in the vertical direction and the circumferential direction. It is stuck to. In this embodiment, each of the deposited film pieces 30, thickness has a substantially rectangular shape of the film pieces of about 100 nm, The area of each deposited film pieces 30, 30μm ² ~100μm ² range of about Has variation.

The area, thickness and shape of the vapor-deposited film piece 30 are not limited to the above, and may be various areas, thicknesses and shapes. Further, a large number of thin-film film pieces 30 may include those in which adjacent vapor-film film pieces 30 are in contact with each other.

The surface of a large number of thin-film film pieces 30 facing the accommodating portion 22 of the inner layer body 20 is slidably in contact with the accommodating portion 22 without being fixed to the accommodating portion 22. That is, the accommodating portion 22 is detachably laminated on the inner surface of the body portion 12 via a large number of thin-film film pieces 30.

In the present embodiment, each of the large number of thin-film film pieces 30 is made of silicon oxide (silica: SiOx). Further, as shown in FIG. 5, between the vapor-deposited film piece 30 made of silicon oxide and the inner surface of the body portion 12, an adhesive film piece 31 as an adhesive film made of an organosilicon compound is provided. ing. By providing the adhesive film piece 31 between the vapor-deposited film piece 30 and the inner surface of the body portion 12, the vapor-deposited film piece 30 can be more firmly fixed to the inner surface of the body portion 12. The vapor-deposited film piece 30 may be directly fixed to the inner surface of the body portion 12 without providing the adhesive film piece 31.

The laminated peeling container 1 having the above structure can be formed by blow molding the synthetic resin preform assembly 40 shown in FIG. The preform assembly 40 has a double structure in which an inner preform 60 made of synthetic resin for forming an inner layer 20 is incorporated inside an outer preform 50 made of synthetic resin for forming an outer layer 10. It has become.

The outer preform 50 is formed into a predetermined shape corresponding to the outer layer body 10 by injection molding the same synthetic resin material as the outer layer body 10 using a mold. In the present embodiment, the outer preform 50 is made of polyethylene terephthalate resin like the outer layer 10.

The outer preform 50 has an outer mouth portion 51 having the same shape as the outer mouth portion 11 of the outer layer body 10. That is, the outer port portion 51 has a cylindrical shape, and a male screw 51a is integrally provided on the outer peripheral surface thereof, and a pair of outside air introduction ports 52 penetrating the outer port portion 51 in the radial direction are the axial centers of the outer port portion 51. It is provided symmetrically on both sides of the. Further, at the lower end of the outer opening portion 51, a substantially test tubular extending portion 53 having a hemispherical bottom portion is integrally provided. The thickness of the stretched portion 53 is thicker than that of the outer opening portion 51. A flange-shaped neck ring 54 is integrally provided between the outer opening portion 51 and the extending portion 53.

The inner preform 60 is formed into a predetermined shape corresponding to the inner layer 20 by injection molding the same synthetic resin material as the inner layer 20 using a mold. In the present embodiment, the inner preform 60 is made of polyethylene terephthalate resin like the inner layer 20.

The inner preform 60 has an inner mouth portion 61 having the same shape as the inner mouth portion 21 of the inner layer body 20. That is, the inner opening 61 has a cylindrical shape having a smaller diameter than the outer opening 51, and is arranged coaxially with the outer opening 51 inside the outer opening 51. A diameter-expanding portion 62 is integrally provided at the upper end of the inner opening portion 61, and the outer peripheral surface of the diameter-expanding portion 62 abuts on the inner peripheral surface of the outer opening portion 51 over the entire circumference, whereby the outer opening portion 51 The upper end of the gap between the inner mouth portion 61 and the inner opening portion 61 is closed to the outside. A flange portion 63 extending outward in the radial direction is integrally provided at the upper end of the enlarged diameter portion 62, and the flange portion 63 abuts on the upper end of the outer opening portion 51 so that the inner opening portion 61 is relative to the outer opening portion 51. Is positioned in the axial direction. At the lower end of the inner opening portion 61, a substantially test tubular extending portion 64 having a hemispherical bottom portion is integrally provided. The outer diameter of the stretched portion 64 is smaller than the outer diameter of the inner opening portion 61. A gap is provided between the outer peripheral surface of the stretched portion 64 and the inner peripheral surface of the stretched portion 53, and when the inner preform 60 is incorporated into the outer preform 50, the outer peripheral surface of the stretched portion 64 and the stretched portion 53 are provided. It is designed so that it will not be scratched on the inner peripheral surface of the. Although details are not shown, three vertical ribs are provided on the outer surface of the inner preform 60 in a predetermined range in the circumferential direction centered on one of the outside air inlets 52, and are arranged side by side at intervals in the circumferential direction. Three vertical ribs are provided side by side at intervals in the circumferential direction in a predetermined range in the circumferential direction centered on the other outside air introduction port 52. The shape of each vertical rib is the same as that of the vertical rib 26 provided on the outer peripheral surface of the inner opening portion 21.

As shown in FIG. 7, a thin-film deposition film 55 is provided on the inner surface of the outer preform 50. The thin-film deposition film 55 is formed by breaking into small pieces to form the thin-film deposition film piece 30. Further, although details are not shown, an adhesive film corresponding to the adhesive film piece 31 is provided between the inner surface of the outer preform 50 and the vapor-deposited film 55.

The vapor deposition film 55 and the adhesive film are deposited on the inner surface of the outer preform 50 by a chemical vapor deposition method (CVD method) using a mixed gas in which _{hexamethyldisiloxane (HMDSO) and oxygen (O 2) are mixed.} It is formed.

More specifically, first, the outer preform 50 is set inside the outer electrode, and the inner electrode is inserted into the outer preform 50 from the outer opening 51. Next, after the inside of the electrode is depressurized to maintain a predetermined pressure, a mixed gas in which hexamethyldisiloxane and oxygen are mixed is supplied to the inside of the outer preform 50 at a predetermined flow rate. Next, a high frequency of 13.56 MHz is applied between the external electrode and the internal electrode under predetermined power output conditions, and plasma is generated between the external electrode and the internal electrode to be introduced into the external preform 50. The mixed gas is decomposed and deposited on the inner surface of the outer preform 50. As a result, an adhesive film formed of an organosilicon compound is formed on the inner surface of the outer preform 50. Next, by changing the power output conditions of the external electrode and the internal electrode and changing the flow rates of hexamethyldisiloxane and oxygen to perform vapor deposition in the same manner as described above, adhesion formed on the inner surface of the outer preform 50 is performed. A thin-film film 55 formed of silicon oxide is formed on the surface of the film by superimposing it on the adhesive layer.

In the chemical vapor deposition method, the application of high frequency between the external electrode and the internal electrode can be performed by pulse discharge that is turned on and off at a predetermined duty ratio. In this case, the duty ratio of the pulse discharge should be set to an arbitrary value so that the outer preform 50 is not excessively heated and contracted.

Further, in the case shown in the drawing, the vapor deposition film 55 is formed on the entire inner surface of the outer preform 50, but the present invention is not limited to this, and the inner surface of the outer preform 50 is formed by masking or the like during vapor deposition. Of these, the vapor deposition film 55 may be formed only on the inner surface of the stretched portion 53 corresponding to the inner surface of the body portion 12 after blow molding. In this case, the vapor deposition film 55 may be formed only on the portion of the stretched portion 53 corresponding to the body body portion 12b, and the vapor deposition film 55 may not be provided on the hemispherical portion corresponding to the bottom portion 12c.

By blow molding the preform assembly 40 having such a configuration, the laminated stripping container 1 shown in FIG. 1 can be manufactured. In this embodiment, biaxial stretch blow molding is adopted as blow molding.

More specifically, in the biaxial stretch blow molding of the preform assembly 40, the outer mouth portion 51 and the inner mouth portion 61 are molded in a blow molding mold (not shown) constituting the blow molding apparatus. The preform assembly 40 is set so that the extension portions 53 and 64 are located inside the cavity while protruding from the cavity and the neck ring 54 is supported on the upper surface of the mold. In this state, the extension portions 53 and 64 are placed. A pressure medium such as pressurized air or pressurized liquid was supplied to the inside of the preform assembly 40 through the inner opening 61 while stretching in the axial direction with the stretching rod, and the stretched portions 53 and 64 were along the inner surface of the cavity. Blow mold into shape. As described above, by biaxially stretching blow molding the preform assembly 40 incorporating the inner preform 60 formed by injection molding inside the outer preform 50 formed by injection molding, the laminate having the above structure is formed. The peeling container 1 can be easily manufactured.

Here, in blow molding, the stretched portion 53 of the outer preform 50 is stretched in the vertical direction (direction of the axial center O) and the radial direction, but the vapor deposition film 55 formed on the inner surface of the outer preform 50 and the adhesion Since the film has poor stretchability, it is not stretched together with the stretched portion 53, but receives a tensile load in the vertical direction and the circumferential direction due to the stretching, and is finely divided in the vertical direction and the circumferential direction. Then, the vapor-deposited film 55 and the adhesive film are finely divided in the vertical direction and the circumferential direction to form a large number of thin-film film pieces 30 or adhesive film pieces 31 on the inner surface of the body portion 12 formed by blow molding. Will be done.

Further, since the vapor-deposited film 55 is formed on the inner surface of the outer preform 50 in a dry state, liquid dripping and uneven thickness occur in the vapor-deposited film 55 when the inner preform 60 is incorporated inside the outer preform 50. The outer preform 50 or the inner preform 60 is easy to handle.

In this way, by blow molding the preform assembly 40 using the outer preform 50 having the vapor-deposited film 55 formed on the inner surface, a large number of thin-film film pieces 30 are dispersed and provided on the inner surface of the body portion 12. The laminated peeling container 1 having the above structure can be easily manufactured at low cost.

The laminated peeling container 1 of the present embodiment having such a configuration can be configured as a squeeze container by attaching a pouring cap to the outer port portion 11. In this case, the injection caps include, for example, a check valve for outside air that allows the introduction of outside air into the outside air introduction port 13 and prevents the outflow of outside air from the outside air introduction port 13 to the outside, and an inner port portion 21. A structure provided with a check valve for the content liquid, which allows the content liquid to be discharged to the outside through the passage and prevents the backflow of the outside air into the inside of the accommodating portion 22, can be used.

In the laminated peeling container 1 configured as a squeeze container, when the body body portion 12b of the outer layer body 10 is squeezed (squeezed), the capacity of the accommodating portion 22 is reduced and deformed, and the content liquid is pushed out from the pouring cap to the outside. Be poured out. When the squeeze of the body body 12b is released after the content liquid is poured out, the body body 12b tries to restore the original shape. At this time, the outer layer 10 and the inner layer are formed from the outside air introduction port 13. The accommodating portion 22 of the inner layer body 20 is peeled off from the inner surface of the body portion 12 while the outside air is introduced between the accommodating portion 20 and the accommodating portion 22, so that only the body portion 12b is restored to its original shape while the accommodating portion 22 is reduced in volume and deformed. .. As a result, the content liquid contained in the accommodating portion 22 can be poured out without being replaced with the outside air, the contact of the outside air with the content liquid contained in the accommodating portion 22 can be reduced, and deterioration and deterioration thereof can be suppressed. can.

Here, in the laminated peeling container 1 of the present embodiment, since a large number of vapor-deposited film pieces 30 are dispersed and provided on the inner surface of the body 12 of the outer layer body 10, the container 22 is peeled from the body 12. The resistance can be sufficiently reduced to the extent that the accommodating portion 22 does not cause peeling failure. As a result, when the content liquid is poured out, the accommodating portion 22 can be surely peeled off from the body portion 12, and poor peeling of the accommodating portion 22 can be prevented. Further, as described above, when the content liquid is poured out, the accommodating portion 22 can be reliably peeled off from the body portion 12, so that the body portion 12 squeezed for pouring out the content liquid has the original shape. Can be made to be able to be restored quickly. Therefore, the laminated peeling container 1 can be surely exerted its function, and the laminated peeling container 1 can be made more convenient.

Further, since the peeling resistance of the housing portion 22 to the body portion 12 is reduced, the laminated peeling container 1 is formed by blow molding, and then the initial peeling operation of peeling the housing portion 22 from the inner surface of the body portion 12 in advance is performed. Even if the storage space S of the laminated peeling container 1 is filled with the content liquid, the storage portion 22 can be reliably peeled from the inner surface of the body portion 12 when the content liquid is poured out. As a result, the production cost of the laminated peeling container 1 can be reduced by eliminating the need for the initial peeling work after blow molding.

Further, in the laminated peeling container 1 of the present embodiment, since a large number of vapor-deposited film pieces 30 are formed of silicon oxide, the peeling resistance to the outer surface of the accommodating portion 22 is further reduced, and the above effect is more reliable. Can be obtained. In particular, by making a large number of thin-film film pieces 30 made of silicon oxide, even when both the outer layer body 10 and the inner layer body 20 are made of polyethylene terephthalate resin, the accommodating portion 22 of the inner layer body 20 is the outer layer body. The above-mentioned effect can be surely obtained by surely peeling from the body portion 12 of 10.

Further, in the laminated peeling container 1 of the present embodiment, since a large number of thin-film film pieces 30 are dispersed and provided only on the inner surface of the body portion 12 of the outer layer body 10, the volume is reduced as the content liquid is poured out. While the deformable accommodating portion 22 is flexible so that the thin-film film piece 30 is not provided, the accommodating portion 22 of the inner layer body 20 is surely peeled off from the body portion 12 of the outer layer body 10 to ensure the above-mentioned effect. Can be obtained.

Further, in the laminated peeling container 1 of the present embodiment, as shown in FIG. 5, an organosilicon compound is formed between a large number of vapor-deposited film pieces 30 made of silicon oxide and the inner surface of the body portion 12. Since the adhesive film piece 31 is provided, a large number of thin-film film pieces 30 can be reliably fixed to the inner surface of the body portion 12. Therefore, it is possible to prevent the vapor-deposited film piece 30 from peeling off from the inner surface of the body portion 12 due to a load or vibration when the body portion 12 is squeezed.

Here, in the laminated peeling container 1 of the present embodiment, it is preferable that the thickness of a large number of thin-film film pieces 30 is 100 nm or more and 300 nm or less.

That is, in the case where both the outer layer body and the inner layer body are made of polyethylene terephthalate resin as in the conventional laminated peeling container, the peeling resistance to the body of the accommodating portion becomes higher, so that the body is used to pour out the content liquid. When the outer surface of the accommodating portion rubs against the inner surface of the body when the portion is squeezed, there is a problem that creaking occurs between them and the tactile sensation of the body becomes uncomfortable. become. In this regard, also in the laminated peeling container 1 having the above configuration, since a large number of thin-film film pieces 30 are dispersedly provided on the inner surface of the body portion 12, there is a gap between the inner surface of the body portion 12 and the outer surface of the accommodating portion 22. If there is an area where the thin-film film piece 30 is not provided and the thickness of the thin-film film piece 30 is too thin with respect to the area of the area, the accommodating portion 22 is squeezed when the body portion 12 is squeezed to pour out the content liquid. The outer surface of the vapor-deposited film piece 30 may come into contact with the inner surface of the vapor-deposited film piece 30 and rub against each other, causing creaking between them.

In response to such a problem, in the laminated peeling container 1 having the above configuration, the thickness of a large number of thin-film film pieces 30 is set to 100 nm or more and 300 nm or less, so that the body portion 12 is squeezed in order to pour out the content liquid. At that time, it is possible to prevent the outer surface of the accommodating portion 22 from coming into contact with the inner surface of the vapor-deposited film piece 30 in the region where the vapor-deposited film piece 30 is not provided between the inner surface of the body portion 12 and the outer surface of the accommodating portion 22. It is possible to surely prevent creaking between them.

In order to confirm the above effects, the laminated peeling container and the adhesive film layer of Example 1 having the above-mentioned structure of the laminated peeling container 1 and having a thickness of the vapor-deposited film piece containing the adhesive film layer of 50 nm were included. The laminated peeling container of Example 2 in which the thickness of the vapor-deposited film piece was 100 nm and the laminated peeling container of Example 3 in which the thickness of the vapor-deposited film piece including the adhesive film layer was 300 nm were prepared.

Here, as described above, the vapor-deposited film pieces and the adhesive film pieces provided on the inner surface of the body portion are formed on the inner surface of the body portion by vapor deposition using the chemical vapor deposition method. The film forming conditions for forming the film are as shown in Table 1.

The laminated peeling containers of Examples 1 to 3 were tested to determine the quality of the tactile sensation of the body when the body was squeezed. Here, if squeaking (squeaking noise) occurs between the inner surface of the body and the outer surface of the accommodating part when the body is squeezed, it is evaluated as × (defective), and even if the body is squeezed, the body is evaluated. If there was no squeeze between the inner surface of the housing and the outer surface of the housing, the evaluation was ○ (good). In addition, in the above-mentioned three laminated peeling containers of Examples 1 to 3, the inner surface of a predetermined portion of the body portion was observed with a microscope, and five vapor depositions selected as samples based on the image obtained by the observation. The area of each of the film pieces was measured, and the average value of the areas of the five vapor-deposited film pieces was calculated. The test results are shown in Table 2.

As can be seen from Table 2, the laminated peeling container of Example 2 in which the thickness of the vapor-deposited film piece including the adhesive film layer is 100 nm, and the lamination of Example 3 in which the thickness of the vapor-deposited film piece including the adhesive film layer is 300 nm. In the peeling container, squeezing of the body did not cause creaking, and the tactile sensation was judged as ○ (good). On the other hand, in the laminated peeling container of Example 1 in which the thickness of the vapor-deposited film piece containing the adhesive film layer was 50 nm, creaking occurred when the body was squeezed, and the tactile sensation was judged to be × (defective).

Further, from Table 2, the area of the thin-film vapor-deposited film piece increases as the thickness of the thin-film film piece including the adhesive film layer increases, that is, only the area of the thin-film film piece with the thickness kept constant. It turned out to be difficult to increase or decrease.

From the above results, it was found that if the thickness of the vapor-deposited film piece including the adhesive film layer is 100 nm or more and 300 nm or less, squeaking when the body is squeezed can be prevented.

In the case where the adhesive film layer is not provided, if the thickness of the vapor-deposited film piece is 100 nm or more and 300 nm or less, squeaking when the body portion is squeezed can be prevented.

It goes without saying that the present invention is not limited to the above-described embodiment and can be variously modified without departing from the gist thereof.

For example, in the above-described embodiment, the thin-film deposition film is provided dispersed in a large number of vapor-deposited film pieces 30, but the present invention is not limited to this, and the inner surface of the body portion 12 is not dispersed in a large number of thin-film deposition film pieces 30. It may be provided as one layer covering the whole of. In this case, the adhesive film can also be provided as one layer over the entire area between the vapor-deposited film and the inner surface of the body portion 12 without being dispersed in the adhesive film pieces 31 corresponding to the large number of thin-film film pieces 30. ..

Further, in the above embodiment, a large number of thin-film film pieces 30 are provided only on the inner surface of the outer layer body 10, but the present invention is not limited to this, and a large number of thin-film film pieces 30 are provided only on the outer surface of the inner layer body 20. Alternatively, a large number of thin-film film pieces 30 may be provided on both the inner surface of the outer layer body 10 and the outer surface of the inner layer body 20.

Further, in the above-described embodiment, a large number of vapor-deposited film pieces 30 are formed of silicon oxide, but the present invention is not limited to this, and the vapor-deposited film pieces 30 are formed by vapor deposition on the inner surface of the outer layer body 10 or the outer surface of the inner layer body 20. If there is, it may be made of another material such as DLC (diamond-like carbon).

Further, the thickness of a large number of thin-film vapor-deposited film pieces 30 is not limited to the above numerical range, and can be variously changed.

Further, in the above-described embodiment, the outer port portion 11 is provided with a pair of outside air introduction ports 13, but at least one outside air introduction port 13 may be provided.

Further, the outside air introduction port 13 is provided in the outer port portion 11 and is a through hole that penetrates the outer port portion 11, but is not limited to this, for example, the upper end of the outer port portion 11 and the inner mouth portion 21. It may be configured as a gap provided between the upper end and an opening to the outside. Alternatively, the outside air introduction port 13 may be provided on the shoulder portion 12a, the body body portion 12b or the bottom portion 12c.

Further, the material of the outer layer body 10 is not limited to the polyethylene terephthalate resin, for example, polyester resin, polyolefin resin, nylon resin, polycarbonate resin (PC resin), cycloolefin copolymer resin (COC resin), cycloolefin polymer resin (COP resin). ) And other synthetic resin materials can also be used.

Further, the material of the inner layer 20 is not limited to the polyethylene terephthalate resin, and for example, polyester resin, polyolefin resin, nylon resin, polycarbonate resin (PC resin), cycloolefin copolymer resin (COC resin), cycloolefin polymer resin (COP resin). ), Other synthetic resin materials such as ethylene-vinyl alcohol copolymer resin (EVOH resin) can also be adopted. When an ethylene-vinyl alcohol copolymer resin is used as the material of the inner layer body 20, an ethylene-vinyl alcohol copolymer resin having an appropriate ethylene content can be adopted in consideration of barrier properties and flexibility. Further, the inner layer body 20 may have a multi-layer structure in which a barrier layer such as an MX nylon resin layer is provided between a pair of polyethylene terephthalate resin layers, for example, in order to secure the barrier property.

Further, the outer mouth portion 11 may not be provided with the neck ring 14, and the shapes of the shoulder portion 12a, the body body portion 12b and the bottom portion 12c can be variously changed.

Further, in the above-described embodiment, the laminated peeling container 1 is a squeeze-type injection in which a pouring cap provided with a spout is attached to the outer port portion 11 and the body portion 12 is squeezed to pour out the content liquid. Although the case where it is used for the delivery container is shown, the case where the body portion 12 has a predetermined rigidity that does not easily squeeze deform and the pump type dispenser is used for the container with a pump attached to the outer port portion 11. It can also be.

1 Laminated peeling container 10 Outer layer 11 Outer port 11a Male screw 12 Body 12a Shoulder 12b Body body 12c Bottom 13 Outside air introduction port 14 Neck ring 15 Concave rib 20 Inner layer 21 Inner mouth 22 Storage 23 Gap 24 Diameter expansion Part 25 Flange part 26 Vertical rib 30 Deposited film piece (deposited film)
31 Adhesive film piece (adhesive film)
40 Preform assembly 50 Outer preform 51 Outer port 51a Male screw 52 Outer air introduction port 53 Stretched part 54 Neck ring 55 Evaporated film 60 Inner preform 61 Inner mouth 62 Expanded diameter 63 Flange 64 Stretched part O Axial center S Containment space

Claims (6)

It is a laminated peeling container made of synthetic resin formed by blow molding a preform assembly in which the inner preform is incorporated inside the outer preform.
An outer layer body having a tubular outer mouth portion and a bottomed tubular body portion connected to the outer mouth portion, and
An inner layer body having a tubular inner mouth portion arranged inside the outer mouth portion and a volume-reducing and deformable accommodating portion detachably laminated on the inner surface of the body portion.
It has an outside air introduction port for introducing outside air between the outer layer body and the inner layer body.
A thin-film deposition film is provided on at least one of the inner surface of the body portion and the outer surface of the accommodating portion .
A laminated peeling container characterized in that the vapor-deposited film is dispersed in a large number of thin-film film pieces. The laminated stripping container according to claim 1, wherein the outer layer body and the inner layer body are each made of polyethylene terephthalate resin. The laminated stripping container according to claim 1 or 2 , wherein the vapor-deposited film is made of silicon oxide. The laminate peeling according to claim 3 , wherein an adhesive film formed of an organosilicon compound is provided between the inner surface of the body portion or the outer surface of the accommodating portion provided with the vapor-deposited film and the vapor-deposited film. container. The laminated peeling container according to any one of claims 1 to 4 , wherein the vapor deposition film is provided only on the inner surface of the body portion. The laminated peeling container according to claim 4 , wherein the thickness of the adhesive film and the vapor-deposited film is 100 nm or more and 300 nm or less.

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