JPS5820657A - Press-out vessel having excellent air-back preventive property - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a squeeze-out container with air-batter prevention properties, more specifically KflI, air-pack prevention properties (non-restoring properties) desirable for squeeze-out containers, and further KsI elements, moisture, Plastic material with barrier properties against fragrance, luminous properties, and attractive appearance IIIK
II.

Conventionally, squeeze containers, such as extruded chains for containing high viscosity liquid products such as toothpaste, cosmetics or food products such as ketchup, mannaise, jam, and cheese:
BACKGROUND ART As large squeeze bottles for storing viscous foods such as I-rate, those made of various flexible laminates are known.

Such plastic material laminate company, general K.

The intermediate layer is an oxygen barrier layer made of saponified ethylene-acetic acid-vinyl copolymer, nylon, etc., and olefin resin layers such as polyethylene are laminated on both sides of this layer. When forming a chain, these flexible laminated sheets are stacked and joined together to form a cylinder.
A threaded extrusion port formed by injection molding of one resin and a conical shoulder connected thereto are adhered to one end of the cylindrical body, and the other end of the cylindrical body is fused, etc. Closed by
゛Mix and squeeze bottle III type K1m
Then, the multilayer parison made of the nine laminated structures described above is hollow-molded in a split shoe to form a bottle.

However, the omniscient plastic wringer container
It has not yet been sufficiently satisfactory both in terms of air pack prevention properties (non-recovery properties) and in terms of the original properties as a container.

For example, unlike squeezed containers made of Aluminum foil or a laminate of aluminum foil and plastic, squeezed plastic containers are subjected to a certain degree of deformation, and then when this is removed, they return to their original shape. etc., air pack,
In other words, the resiliency is excessively high, and for this reason, when the container is sealed with a lid and restored after use, a large amount of air is sucked into the container.
As a result, the contents deteriorate due to oxygen in the container. In addition, in relation to excessive resilience,
When the remaining amount of the contents becomes small, the contents cannot be squeezed out from the mouth unless the container wall is pressed and deformed to a considerable extent, and air is still trapped in the container. In connection with this, during the above-mentioned suppressive deformation, a significantly larger amount of the contents than the amount used in - times is pushed out or scattered as it is or together with the air, resulting in loss of contents and damage to clothes or tables. This causes contamination of the tabletops, resulting in drawbacks such as b.

In addition, Mori and Shibori 9 are available in plastic squeezing containers.
In order to provide the easy deformability necessary for dispensing, the walls of the container must be made fairly thin, and this prevents the permeation of aroma and moisture from the contents to the outside air while oxygen permeates to the contents through the container. Another problem is that this occurs at a level that cannot be ignored. Furthermore, these plastic squeeze containers are
It has the property of transmitting light, and deterioration of the contents by light is also a serious problem.

Therefore, an object of the present invention is to provide a plastic squeeze container that has excellent airbag prevention properties, that is, the resilience after squeezing out the contents is suppressed to a low level, particularly a plastic squeeze container with a multilayered laminated structure.

Another object of the present invention is to provide a new plastic squeeze container which has air pack prevention properties, excellent optical properties and improved gas barrier properties, and also has a distinctive appearance.

Original Ij! In addition to o* and other purposes, an oxygen barrier resin layer and a moisture resistant resin layer, flake pigments or flakes 5! A plastic multi-layer extrusion container containing a lateral agent and comprising a thermoplastic fl1M blend layer, in which flake-like pigments have a novel distribution form.
is to provide.

According to the present invention, a thermoplastic resin blend layer having a uniform barrier thermoplastic resin layer, a moisture-resistant thermoplastic resin layer, and a flaky pigment layer distributed in layers and having a fluffy filler is formed. Provided is a squeeze container with excellent air pack prevention properties, which is characterized by being made of a multilayer laminated structure containing:

According to the present invention, a 1-element barrier thermoplastic resin layer, a moisture-resistant thermoplastic resin layer, and a flake-like pigment or flake-like filler are further blended to form a blend layer structure in a good thermoplastic resin blend layer. Specifically, the thermoplastic resin in one layer of the blend has (1) a melting point or softening point lower than that of the oxygen barrier thermoplastic resin, and 1) a melting point or softening point lower than that of the moisture-resistant thermoplastic resin. or from the resin
Air pack prevention properties selected to have a high melt index, characterized in that flake-like pigments or fillers are preferentially distributed in the center of the blend layer in the thickness direction and are oriented in the plane direction. A squeeze container is provided.

The squeezing device 11is of the present invention can be used for various purposes in the form of a so-called tube container, squeeze bottle, or other modified container for squeezing out the contents.

In No. 1.2 and 311 showing one specific example of the chain packaging body of the present invention, this tube body is
It consists of a tube main body made by one company, a threaded extrusion port δ formed integrally with the paper by hollow molding of a multilayer parison, which will be described in detail later, a flexible conical shoulder portion 4 connected to this, and It has a cylindrical body 5.

In FIG. 3, which shows an enlarged wall section of a multilayer parison constituting each of these parts, the body wall 5 includes an oxygen barrier thermoplastic resin layer 6, a moisture-resistant thermoplastic resin layer 7, and an intervening layer between these two layers. The flake pigment-containing resin blend layer contains a blend layer.

In FIGS. 1 and 2, this cylindrical body 5 has a cut edge 9, at which edge 9.

The facing inner layers 10.10 of the body are overlapped and fused to form the bottom.゛The important features of the present invention are the oxygen barrier resin layer 6 and the moisture-resistant resin layer 7.
In addition, layer 8 of a blend containing a thermoplastic resin and a flake pigment or flake filler is used as the container of the squeezing container.

That is, when a flake pigment or the like is blended into a thermoplastic resin and the holes are formed into a layer and co-melted and extruded with the resin layers 6 and 7 described above, the flake pigment eyes are formed along the extrusion direction and along the vessel mli direction. Due to the orientation of the flake-like pigment, etc., the wall of the multilayered container has a tendency to undergo plastic deformation under stress. In this way, a certain suppressing deformation is applied to the container body,
When it is then cleaned, the restoring force of the present invention is, for example, on the order of 210 to 1000 f for a conventional container (container without flake pigmented blend layer). In squeeze containers, when compared with the same thickness, a thickness on the order of about 1/2 to 1/4 M can significantly improve air pack prevention performance.
I am myself.

In the present invention, it is also possible to form a layered structure in which one layer of a blend of a thermoplastic resin and a flake pigment, etc. is blended with an oxygen barrier resin layer and a moisture-resistant resin layer.
It is extremely important to orient the materials along the extrusion direction and along the direction of the container 11w, thereby improving the air pack prevention performance.

That is, under conditions where a blend containing flake pigments, etc. can be extruded as a single layer, the orientation of the flake pigments, etc. will be in an areto-random direction, and the restoring force during suppressed deformation will be reduced to a small level. On the other hand, at high temperature extrusion conditions where orientation of the flaky pigment capes occurs, the melt tension of the blend becomes too low to form into containers. On the other hand, according to the present invention, when a fluke-like pigment blend layer is extruded together with an oxygen barrier resin layer and a moisture-resistant resin layer, both phase fat layers serve as a supporting carrier for one layer of the blend.
□Accordingly, it is possible to form 17 into a squeezing container while imparting layered orientation to the flaky pigment.

Moreover, the blend physics of blending flake pigments, etc.
Mechanical properties tend to decrease with drying up, but since there is an oxygen barrier resin layer and a moisture resistant resin layer independent of this blend physics, it is possible to keep the elasticity, impact strength, etc. within the desired range required for the container. Easy to maintain.

Further, according to the invention, since there is a resin layer with excellent oxygen barrier properties and a resin layer with excellent water vapor barrier properties, the squeeze container Fil! The clay has a fast-acting Ki [Ki] against elements, water vapor, and aroma, and the flake pigments are distributed in layers overlapping each other in the blending physics, resulting in a china clay with even better gas barrier properties.

Furthermore, in this blend physics, the flake pigment or filler is distributed in layers, so the container has a metallic appearance, which can significantly increase the commercial value. In addition, this container has a luminous property and can effectively prevent the contents from being altered by light.

In the present invention, the most preferred example of the oxygen barrier resin layer 6 is ethylene-vinyl alcohol copolymer, especially vinyl alcohol alone) content of 40 to 85
Molty, especially 50 to 80 molty, can be mentioned4. Such an ethylene-vinyl alcohol co-X combination is a combination of ethylene or a major portion of ethylene and a minor component of other olefins such as tetrapyrene, vinyl formate,
Saponifying copolymers with vinyl esters of lower fatty acids such as vinyl acetate and vinyl tetrapionate, especially ethylene-vinyl acetate copolymers, so that the degree of saponification becomes 96- or higher, especially VC99- or higher. Obtained from K.

Other examples of oxygen barrier resins include nylon ItJ.
l, % (Ron 6, Nylon 8, Nylon 11, Nylon □□': 2, Nylon 6.6, Nylon 6.1
0, nylon 10g6, or nylon 6-6-6 copolymer.

The oxygen barrier resin can be used in the form of a so-called blend. For example, a blend of an ethylene-vinyl alcohol copolymer and a nitrogen resin can be used; Polymer and/or
Alternatively, a blend consisting mainly of nylon and a small amount of other resin such as polyethylene, ethylene-vinyl acetate copolymer, or ionomer may have an oxygen permeability coefficient of 5.5.
X 10” CI knee ts/d・em・cmH!< 37
C, 0*RH) below, 41 to 4.5 X 10 cc
-m/al・m・tsH1 or less can be used for the purpose of the present invention.

The moisture-resistant resin layer has low permeability to water vapor and has a suitable Ka elastic modulus (J?o) of 700 to 9.0.
00Kp/all, 41 to 700 to 4. CDoll
/alI, most preferably olefinic resins.Olefinic resins include any olefinic resin known per se, such as low, medium to high density polyethylene, isotate resins. Polyolefins such as polypropylene, polypropylene-1,4-methylpentene-1, and ethylene-propylene copolymers; or olefins mainly composed of olefins such as ethylene-vinyl acetate copolymers, ethylene-acrylic monoester copolymers, and ionomers. copolymers; or blends thereof.In order to improve the drawing properties of the olefin resin layer, polyisobutylene, butyl rubber, styrene-butadiene rubber,
Small amounts of elastomers such as ethylene propylene rubber, i.e.
The olefin resin can be blended in an amount of 100 parts by weight and 1 to 30 parts by weight.

In the present invention, in terms of the most suitable drawing characteristics,
As mentioned above, the elastic modulus is in the range of 700 to 4,0004/-!
It is preferable to use a certain olefinic resin, and for 41, low density polyethylene, ethylene-vinyl acetate copolymer, or ionomer.

In the present invention, as the thermoplastic resin constituting the blend physics, an olefin resin, an acid-modified olefin resin, or a blend thereof is preferably used. That is, the blend physics containing olefin resin shows excellent adhesion to the olefin resin layer as a moisture-resistant resin layer,
On the other hand, a blend cut containing an acid-modified olefin resin or a polymer blend thereof has an olefin resin layer as a moisture resistant resin and an ethylene layer as an oxygen barrier resin.
1fIIIC is advantageous for the purposes of the present invention since it exhibits adhesion to both vinyl alcohol copolymer layers. As the olefin resin, any of the olefin resins exemplified with respect to the moisture-resistant resin can be used. As the llf-type oleolefin resin, there is used one obtained by modifying the above-mentioned olefin resin by graft polymerizing an ethylenically unsaturated carboxylic acid or its anhydride. Suitable examples of acid type mer used for modification are as follows.

A Ethylenically unsaturated carboxylic acid nialic acid, methacrylic acid, maleic acid, 7-maric acid, crotonic acid, itaconic acid, citraconic acid, 5-norbornene-2,5°-dicarboxylic acid.

B, ethylenically unsaturated carboxylic anhydride: maleic anhydride, citraconic anhydride, 5-norl-lune-2,5-dicarboxylic anhydride, tetrahydrofuric anhydride.

It is desirable to graft these 0risill monomers so that the carboxyl group concentration is 1 to 600 mg/100 F polymer, * is 10 to 500 mg/100 F polymer, #modified olefin system 11N
It is also possible to use a blend of and an olefin resin so that the concentration falls within the above range.

As the flake pigment or flake filler to be blended into the blend layer, mica or metal flake pigments, such as flake pigments of aluminum, steel, lead, etc., are preferably used. The aspect ratio of the flake pigment used, that is, the ratio of maximum flake diameter/flake thickness, is 20.
The maximum diameter of the flake pigment is preferably in the range of 100 to 1000 tones.

It is desirable to contain the flake pigment of C- in an amount of 5 to 100 parts by weight and 10 to 50 parts by weight per 100 parts by weight of the resin. The improvement in IIIWP properties obtained is unsatisfactory, while if the amount exceeds the above range, the mechanical properties of the blend layer itself will deteriorate significantly.

The squeeze container of the present invention has an oxygen barrier resin layer (6)
, a moisture-resistant resin layer (b), and a blended material as essential components, any layer structure can be adopted. Of course, if adjacent resin layers do not have adhesive properties, an adhesive layer such as acid-modified olefin resin may be interposed.

A suitable example of a multilayer structure is as follows.

(1) Three-layer configuration R/C/A.

(II) 12 & i layer configuration ri/C//1/C.

B/C/D/A (Ill) Five-layer structure/C/A/C/B B/C/D/A/C1 (1v) Six-layer structure B/C/D/A/b/B B/ C/D/A/D/C B/C/D/A/C1/B (V) Upper layer composition/C/D/A/D/C/B In the squeeze volume 5 of the present invention, ordinary aqueous For the contents, it is recommended to use olefin resin as the innermost layer for both hygiene and moisture barrier properties.
For oily contents, ethylene-
In some cases, it may be desirable to have a vinyl alcohol copolymer as the innermost layer. For many purposes, an olefin resin as a moisture-resistant resin is used as the inner and outer surface layers, an ethylene-vinyl alcohol copolymer as an oxygen barrier resin is used as an intermediate layer, and a flake-like pigment-containing resin is placed between these layers. Preferably, there is an intervening layer.

The thickness of each resin layer is determined so as to simultaneously achieve the required gas barrier properties and airbag prevention properties. That is,
When the thickness of the oxygen barrier resin layer is t, the thickness of the moisture-resistant resin layer is t, and the thickness of the flake pigment blend is t, then [L20≧jmu/(th+tB+t(3)≧α01-0)
．． 6≧tB/(t+tB+t'c)≧0.10.9
The thickness of each layer is set so that ≧tc/Cl+tB+t(3)≧α4, and the overall thickness is set from 0.17 to t.
oms, special KO,! It is preferable to set it to S to α7■.

These resin layers are co-melted and extruded into a multilayer parison and blow molded to form a squeeze bottle, or the edges of the bottle are heat sealed to form a tinib container. Alternatively, these can be formed into a multilayer film and stacked and fused to form a chain container.

The squeezing device of the present invention can print on the outer wall surface of the container, and in this case, in order to prevent the printing from coming off, the top of the outer surface of the epoxy, acrylic, or epoxy-vinyl container, which is commonly used; - It is desirable to apply:
□... Part 4 for explaining the manufacturing method of the squeeze container of the present invention
In A to 4-711, the number of extruders 1 (only one extruder is shown in the drawing) corresponding to the type of resin layer constituting the multilayer parison is used, - base barrier resin, The moisture-resistant resin and the resin containing the pigment are co-melted and extruded through a multilayer die 12 into a multilayer Parisontro (4th AWJ).

A pair of splits 1114.14 are provided along the direction of extrusion of this multilayer parison 16. This percentage is 1114.
14 has a t-cavity 1 defined by an inner wall corresponding to a threaded extrusion opening, a conical shoulder, and a cylindrical body of the tape container.
5 and parison 1! and a base insert 16 for pinching off the s.

In FIG. 4-8 showing the blow molding process, the multilayer parison 13 extruded from the die is sandwiched between split molds 14 and 14, and its lower end is pinched off with a pace insert 16 to form a bottom part. A fluid such as air, nitrogen, or water vapor is blown into the parison 13 to create a flexible bottle 17 (Fig. 4-0) having a threaded outlet, a conical shoulder, a cylindrical body, and a bottom connected thereto. (see).

The thus formed flexible bottle 17 is obtained by cutting the bottom part 19 at the edge of the body part O continuous thereto using a powerful cutter 18 at the third point 1'' shown in No. 4-C@. Remove this.

Next, in Step 4-D@, the tape body 1 with the prongs 2 arranged in the threaded mouth part is inverted, and viscous fluid is injected into the pipe body from the filling nozzle 21 through the end edge 20 of the tape body 1. It is filled with a certain liquid content 22.

Furthermore, in the 1st 4th-E@, the chamber zero body 2 filled with the contents 22 is cleaned of its internal atmosphere (air, etc.) as necessary.
After virtually eliminating the
The first part 20 is sandwiched by a heat fusion mechanism such as a heat sealer 23, and the opposing inner layers are overlaid and fused together to form a tool having a bottom portion formed by overlapping fusion bonding as shown in No. 4-JFIIK. as a double package.

In the present invention, the melt extrusion of the multilayer resin is carried out at a temperature above the melting temperature of the resin and below 1 degree of its decomposition.
It can be carried out at temperatures of 85° to 230°C under conditions known per se.

In addition, the blow molding of the multilayer parison must be carried out under conditions that are known per se, except that the body and conical shoulder of the bottle should have a basis weight that provides flexibility suitable for squeezing, etc. Therefore, flexible bottles can be easily manufactured using, for example, a row type or intermittent type blow molding machine.

Further, the overlapping and welding of the inner layers at the opening edge of the container can be performed using any mechanism such as high frequency welding or ultrasonic motion in addition to the k-to sealer.

Furthermore, the squeeze bottle should be manufactured by the same method as the above-described blow molding, excluding cutting of the bottom.

In the most preferred embodiment of the present invention, the thermoplastic resin CC) in which the flaky pigment etc. is blended has a melting point or softening point lower than the melting point of (I) the oxygen barrier thermoplastic resin (4); One (11) Select one that has a melting point or softening point lower than the melting point of the moisture-resistant thermoplastic resin (b), or has a melt index higher than the melt index of the underarm resin (8); A blend of this tree N(r) mixed with flake pigments, etc. is sandwiched between the flow of the melt of the oxygen barrier resin and the flow of the moisture-resistant melt in a multi-layered goo. Simultaneous extrusion is carried out in this state.

In other words, a tree containing flake pigment! I1 mouth is above (1
) and (satisfying the ship's conditions).This blend has an extremely low melt viscosity in the die and is in a fluid state, so the flake pigment is distributed in the center of the thickness direction. It is distributed densely and overlapping in layers in the plane direction, and the resin concentration is extremely high in the adjacent parts suitable for the 4i1 elemental barrier tree JJl (6) and the moisture-resistant resin. Due to the concentration gradient distribution structure, this aspect of the invention provides excellent adhesion between each layer.
Moreover, it also has 41 excellent air pack prevention properties.

As a moisture-resistant resin (if the uniform and blend layer resin inhibitor are the same type of olefin resin, blend layer resin 1),
The melt index is at least 15 to 10 f/10-higher than the moisture-resistant resin (b), preferably 2 to 4 f/1.
0 - It is recommended to use a high value. In addition, the melting point of an ethylene-vinyl alcohol copolymer increases as the content of vinyl alcohol units increases, but copolymers with a vinyl alcohol content in the above-mentioned range 8 have low melting points from this point of view. For the purpose of the present invention, it is 4G compatible.

Of course, if a heat-resistant resin is used, a squeeze container that can be sterilized by heating is also included within the scope of the present invention.

The invention is illustrated by the following example.

In the example, an ethylene-vinyl alcohol copolymer (2) (1111 points, 183 tl') having an ethylene content of 60 molty, a vinyl alcohol content of 697 molty, and a vinyl acetate content of a3 molty was used as the oxygen barrier resin layer. Moisture resistant resin, melting point 105r, melt index (n7
) 0.5P710m, low density polyethylene (6) with density α91f/j (20C), melting point 102C%J/70.5
F/10m, density α92t/d<2DC), vinyl acetate content 5wt-ethylene-vinyl acetate copolymer, melting point 116C% MIα49/1011i1, density 0.93
P/af (20C) medium density polyethylene (b), melting point 12F3C, MIQ, 3f/10m, density α95r/c
d (20c) high density polyethylene (a), melting point 154
C%M114f/10m, density 0.90f/j (20C
) ethylene-propylene copolymer (g) and melting point 1
63tll'.

MIO, 7f/10m, density 0.91 f/a ((20
The polypropylene β) of G) is used as a blend pipe layer interposed between the intermediate layer of the oxygen barrier resin and the inner and outer layers of the inertia resistant am, and has a melting point of 102C.

MIQ, 01710wm, density 0.926f/cd<2
0C) acid-modified low-density polyethylene 100 from Mitsubishi Petrochemical Division
40 mica flakes with an aspect ratio of 30 per weight part
As a companion and a comparative example, a blend containing (parts by weight) was used, and as a comparative example, an acid-modified low-density polyerene was used in place of the prenod snout layer, and the composition had the layer II composition, layer composition ratio, etc. shown in the first article. Three types and five layers were molded using the molding apparatus shown below.

An extruder for the oxygen barrier resin layer has a built-in screw with a diameter of 40mm and an effective length of 800m, and an adapter with a built-in screw with a diameter of 35mm and an effective length of 700mm, and a melt channel that branches into two. The extruder for the adhesive intervening layer was equipped with a built-in screw with a diameter of 65 mm and an effective length of 700 mm, and an adapter with two branched melt channels was installed for the olefin resin layer. Using a multilayer extruder consisting of an extruder and a symmetrical five-layer extrusion die, a molten multilayer parison having the layer configuration shown in Table 1 was formed, and this parison was sandwiched between 10CK cooled gold rIIK, A multilayer tube container containing 12 contents was obtained by blow molding at a blow pressure of 6 Ke/edK.

Table 1 shows the evaluation results regarding restoring force, moisture permeability, oxygen permeability, light transmittance, and appearance characteristics.

As is clear from this table, the percentage of Examples is higher than that of Comparative Examples.
Excellent air bag prevention properties, moisture impermeability, etc.
Used as a squeeze tube container (it turns out that it is extremely functionally superior).

Example 2゜ Implemented as an oxygen barrier resin layer as an intermediate layer f'1l
The ethylene-vinyl alcohol copolymer (a) described in IK was used, the low-density polyethylene 4 and ethylene-vinegar-vinyl copolymer described in Example 1 were used as the inner moisture-resistant resin layer, and the outer layer was the ethylene-vinyl alcohol copolymer (a). Melting point 100C%M1
1. Of/wa, density α94f/al (20C), vinyl acetate content 15 wt- anhydrous maleic 1! ! A blend (1) containing 30 parts by weight of mica flakes with an aspect ratio of 30 was blended with 100 parts by weight of a luxurious ethylene vinyl acetate copolymer, and the contents 100 were made using the same molding equipment and molding method as in Example 1. A three-layer tube container containing 3□′ seeds was obtained.

As shown in Table 2, the evaluation results regarding the restoring force, moisture permeability, oxygen permeability, light transmittance, and appearance characteristics of the obtained tube container are extremely excellent as squeeze containers. The evaluation method was the same as in Example 1.

Example 5 The oxygen barrier resin of the intermediate layer had an ethylene content of 4.
0 mole of ethylene-vinyl alcohol copolymer (1)
(melting point 165C), and the ethylene-propylene copolymer (a) described in Example 1 was used as the moisture-resistant resin for the inner and outer layers, and the blend was interposed between the intermediate layer and the inner and outer layers. The ethylene-propylene copolymer-
Blend (A) was used, in which 50 parts by weight of mica flakes with an aspect ratio of 30 were blended with 100 parts by weight, and a blend with a melting point of 152t', M
Using maleic acid-modified polypropylene (I2,5t 7m, density Q, 905f/al), a four-type, seven-layer tube container with a content of 120f/al was prepared in the same manner as in Example 1.

As shown in Table 3, the results of the evaluation of the restoring force, water permeability, -elementary transmittance, light transmittance, and extrusion characteristics of the obtained tube container are extremely good as a squeezing container.

In addition, this tube container was filled with 120 cc of water and sealed, and retort sterilized for 120 liters for 30 minutes, but there was no problem with the percentage.

The evaluation method is! j! The same method as in Example 1 was used.

- Evaluation method 1: A round rod of 110φ is placed in the center of the body of a container to measure the force with which the dent restores its shape. *2 Moisture permeability: Moisture reduction rate when stored for one month in 50C, 11 degrees, 1O-RH atmosphere
Total light transmittance measured using the standard C light source (J) Jar 5 Appearance characteristics Appearance with emphasis on metallicity by visual inspection] II4 Oxygen transmittance inside the container 100 ToRH outside the container 80 f4RH37CK
Oxygen transmission rate by GC method in

[Brief explanation of drawings]

1 is an external view of the tube package of the present invention, 2WA is a cross-sectional view of the tube package, FIG. 3 is an enlarged cross-sectional view of the multilayer parison wall, 4-A, 4-BWJ, 4 -CE, 4th-DI!
! ! 1, FIG. 4-E, and FIG. 4-F are process diagrams showing a method for manufacturing a tube package. DESCRIPTION OF SYMBOLS 1... Tube body, 2... Lid, 3... Extrusion port with screw, 4... Shoulder part, 5... Body part, 6... Oxygen barrier resin layer, 7... Moisture-resistant resin layer, 8... Blend physics, 9... Edge portion, 10... Inner view, 11...
・Extruder, 12... Multilayer die, 13... Multilayer parison, 14... Split mold, 15... Cavity, 16
...Pace insert, 17...Flexible bottle, 1
8... Cutter, 19... KW6.20... Edge portion, 21... Filling nozzle, 22... Contents, 23-
0. Heat, seal bar. Patent applicant: Toyo Seikan Co., Ltd. Figure 3

Claims (9)

[Claims] (1) It is characterized by being composed of a multilayer laminated structure including an oxygen barrier thermoplastic resin layer, a moisture-resistant thermoplastic resin layer, and a thermoplastic resin blend layer having a flake-like pigment or flake-like filler distributed in layers. Airbag-preventing tic@retractable squeeze container. (2) Consisting of a multilayer structure including a layer of a primary barrier thermoplastic resin, a moisture-resistant thermoplastic resin layer, and one layer of a thermoplastic resin blend containing a flake pigment or flake filler; The one-layer thermoplastic resin has (1) a lower melting point or softening point than the II barrier thermoplastic resin,
and (11) a 7-lake pigment selected to have a melting point or softening point lower than that of the moisture-resistant thermoplastic resin, or a melt index tf higher than that of the resin, and in the center of the thickness direction of one layer of the blend. A squeeze container having excellent airbag prevention properties, characterized in that the filler is densely distributed and oriented in the plane direction. (3) The container according to claim 1 or 2, wherein the oxygen barrier thermoplastic resin layer is made of a mixture of ethyl, ethylene, and vinylalcohol having a vinyl alcohol content of 40 to 85 moles. (4) The container according to claim 1 or 2, wherein the moisture-resistant thermoplastic resin is an olefin resin. (5) The thermoplastic resin blend layer includes an acidic olefin resin, an olefin resin, or a blend of these resins) 7 and 100 parts by weight of the resin and 5 to 100 parts by weight of flake-like pigment or flake-like filling. 1113. A container according to claim 1 or 1112, comprising an agent. (6) The container according to claim 1, wherein the flake pigment or filler is mica or flake metal. (7) A patent claim consisting of a multi-layered laminated structure in which a moisture-resistant thermoplastic barrier layer is placed on the inner and outer surfaces W, a gas barrier thermoplastic resin is placed in the middle, and a blend layer is interposed between both layers. Container described in Section 1 or Section 2 of IB Library. (8) The container according to claim 111I, or claim 2, wherein the multilayer laminate structure is a coextruded laminate structure. (9) The container according to claim 1' and claim 2, which has a wee-like shape. A container according to claim 1 or claim 2 in the form of a flexible bottle.