CN113306835B

CN113306835B - Barrier bottle and manufacturing method thereof

Info

Publication number: CN113306835B
Application number: CN202010118629.1A
Authority: CN
Inventors: 卢云峰; 邓玉明
Original assignee: Inner Mongolia Yili Industrial Group Co Ltd
Current assignee: Inner Mongolia Yili Industrial Group Co Ltd
Priority date: 2020-02-26
Filing date: 2020-02-26
Publication date: 2024-06-18
Anticipated expiration: 2040-02-26
Also published as: CN113306835A

Abstract

The invention relates to a barrier bottle and a manufacturing method thereof. The invention solves the technical problem that the bottom of the PET bottle body has a barrier leak and cannot fully protect the content.

Description

Barrier bottle and manufacturing method thereof

Technical Field

The invention relates to a bottle type, in particular to a barrier bottle with a barrier layer arranged at the bottom of a bottle body and a manufacturing method thereof.

Background

In recent years, with the continuous improvement of living conditions and consumption level of residents, beverage products such as dairy products, dairy beverage, compound fruit juice, fruit and vegetable juice and the like are rapidly developed, and the beverage products are easily deteriorated under the actions of illumination, oxygen and the like in the shelf life, so that the taste or the efficacy is damaged. At present, a composite film paper can, a PET (polyethylene terephthalate) bottle, a PE (polyethylene) bottle, a glass bottle or a metal can with barrier performance are used for packaging the beverage products, wherein in the aspect of PET bottle type packaging, a method of adding a barrier agent into PET raw materials, such as adding a light barrier agent, an oxygen barrier agent and the like, is mostly adopted, so that the PET bottle type packaging can be used for blocking light and oxygen, further the protection of contents is formed, and the purpose of prolonging the shelf life is achieved.

However, with the implementation and popularization of European plastic limiting command, the PET industry in China also promotes the requirement on sustainable development, namely, the recycling of PET raw materials is realized, and the existing PET bottle type is manufactured by adopting a method of adding a barrier agent, so that materials produced by the PET bottle type cannot be recycled, waste of the drunk PET materials is caused, and further development of the PET bottle type is hindered.

In the prior art, although enterprises take blocking measures on PET bottles, the blocking measures are limited to blocking the PET bottles, and the bottle bottom is often ignored as a part of the PET bottles, so that the existing PET bottles have extremely large blocking holes, so that the content cannot be completely protected to be deteriorated, and the aim of prolonging the shelf life of the product cannot be really achieved.

Aiming at the problem that the barrier leak exists at the bottom of the PET bottle body in the related technology and the content cannot be fully protected, no effective solution is proposed at present.

Therefore, the inventor provides a barrier bottle and a manufacturing method thereof by virtue of experience and practice of related industries for many years so as to overcome the defects of the prior art.

Disclosure of Invention

The invention aims to provide a separation bottle and a manufacturing method thereof, wherein a separation interlayer is arranged in the bottom of the bottle, so that the influence of light, air and moisture on the quality guarantee period of contents is effectively avoided, most materials of the bottle body can be recycled, the bottom separation leak of the bottle body is eliminated, the bottle body can be subjected to omnibearing separation through the cooperation of the separation interlayer and a full-separation label, and the requirement of the contents on the separation performance is met.

The aim of the invention can be achieved by adopting the following technical scheme:

The invention provides a blocking bottle which comprises a bottle body, a bottle opening and a bottle bottom, wherein a containing cavity for containing contents is formed in the bottle body, the bottle opening is arranged at the top of the bottle body and is communicated with the containing cavity, the bottle bottom is arranged at the bottom of the bottle body, and a blocking interlayer capable of blocking light rays, gas and moisture is arranged in the bottle bottom along the extending direction of the bottle bottom.

In a preferred embodiment of the present invention, the thickness of the barrier interlayer is 0.05 mm or more.

In a preferred embodiment of the present invention, the barrier interlayer is made of a barrier nylon, ethylene, vinyl alcohol copolymer, carbon black or a mixture of an oxygen inhibitor and carbon black.

In a preferred embodiment of the present invention, a full-blocking label is disposed on an outer wall of the bottle body, a blocking layer capable of blocking light is disposed on a side surface of the full-blocking label, which is close to the bottle body, the top of the full-blocking label extends to the bottom of the bottle mouth, and the bottom of the full-blocking label extends to the top of the bottle bottom.

In a preferred embodiment of the present invention, the full-blocking label is in a sheet structure, and is fixedly sleeved on the outer side of the bottle body along the circumferential direction of the bottle body, and the side surface of the full-blocking label, which is close to the bottle body, is attached to the outer wall of the bottle body.

In a preferred embodiment of the invention, the barrier layer is made of carbon black.

In a preferred embodiment of the invention, the bottle mouth is covered with a bottle cap which can block light, gas and moisture.

The invention provides a manufacturing method of a barrier bottle, which comprises the following steps:

step S1: processing to produce a bottle blank, wherein the step S1 comprises the following steps:

Step S101: injecting the bottle body raw material in a molten state into a bottle blank mold, and carrying out injection molding on the bottle blank from the bottle mouth to the bottle bottom;

Step S102: when the bottle body raw material completes injection molding of the bottle body and the bottle bottom is not subjected to injection molding, injecting a blocking interlayer raw material in a molten state into the middle part of the bottle body raw material, wherein the blocking interlayer raw material is injected into the bottle blank mold along with the bottle body raw material, the bottle bottom raw material is injected to form the bottle bottom, and the blocking interlayer raw material forms a blocking interlayer in the bottle bottom;

step S2: stretching the bottle body and the bottle bottom of the bottle blank to enable the barrier interlayer to be synchronously stretched along with the bottle bottom;

Step S3: and high-pressure air is introduced into the accommodating cavity from the bottle mouth, the bottle body and the bottle bottom of the bottle blank are fully expanded in the bottle blank mold under the blowing of the high-pressure air, and the barrier interlayer is filled at the bottom of the bottle blank mold along the extending direction of the bottle bottom.

In a preferred embodiment of the present invention, in the step S2, a stretching rod is extended from the bottle mouth of the bottle preform into the accommodating cavity, and the bottom end of the stretching rod abuts against the inner wall of the bottle bottom, so that the bottle bottom of the bottle preform is stretched toward the bottom of the bottle preform mold.

In a preferred embodiment of the present invention, the bottle material is a PET material; the barrier interlayer is made of barrier nylon, ethylene, vinyl alcohol copolymer, carbon black or a mixture of an oxygen inhibitor and carbon black.

From the above, the barrier bottle and the manufacturing method thereof have the characteristics and advantages that: the bottle bottom is internally provided with the blocking interlayer along the extending direction of the bottle bottom, light, gas and water can be blocked through the blocking interlayer, blocking holes at the bottom of the bottle body are eliminated, the blocking interlayer is matched with the full blocking label, the whole blocking effect of the bottle body can be achieved, and the requirements of content on blocking performance are met.

Drawings

The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention.

Wherein:

Fig. 1: is a front view of the barrier bottle of the present invention.

Fig. 2: is a bottom view of the barrier bottle of the present invention.

Fig. 3: the invention discloses a schematic diagram of a matched and connected structure of a separation bottle, a bottle cap and a full-separation label.

Fig. 4: the structure of the multi-layer double-screw injection molding equipment used in the manufacturing process of the barrier bottle is schematically shown.

Fig. 5: an enlarged view of part of the a position in fig. 4.

Fig. 6: is a schematic structural diagram of the barrier bottle in a bottle blank state.

Fig. 7: a schematic diagram of the structure of the preform in fig. 6 in the stretched initial state is shown.

Fig. 8: a schematic diagram of the structure of the preform in the intermediate stretching state in fig. 6 is shown.

Fig. 9: a schematic diagram of the structure of the preform in fig. 6 in a stretched and formed state is shown.

The reference numerals in the invention are:

1. a bottle body; 101. A receiving chamber;

2. A bottle mouth; 3. A bottle bottom;

301. A central region; 4. A barrier interlayer;

5. a bottle cap; 6. Full barrier labels;

7. a stretching rod; 9. A multi-layer twin screw injection molding apparatus;

901. a bracket; 902. A bottle blank mold;

903. A first housing; 9031. A first material accommodating cavity;

9032. a first material adding port; 9033. A first discharge port;

904. A main screw; 905. A second housing;

9051. a second material accommodating cavity; 9052. A second material adding port;

9053. a second discharge port; 906. A secondary screw;

907. a material conveying hose; 908. A second valve needle;

909. A first valve needle.

Detailed Description

For a clearer understanding of technical features, objects, and effects of the present invention, a specific embodiment of the present invention will be described with reference to the accompanying drawings.

Example 1

As shown in fig. 1 and 2, the invention provides a barrier bottle, which comprises a bottle body 1, a bottle opening 2 and a bottle bottom 3, wherein the bottle body 1 is of a cylindrical structure arranged along the vertical direction, a containing cavity 101 for containing contents is formed in the bottle body 1, the bottle opening 2 is positioned above the bottle body 1, the bottom of the bottle opening 2 is connected with the top of the bottle body 1, the bottle opening 2 is communicated with the containing cavity 101, the bottle bottom 3 is positioned below the bottle body 1, the top of the bottle bottom 3 is connected with the bottom of the bottle body 1, and a barrier interlayer 4 capable of blocking light, gas and moisture is arranged in the bottle bottom 3 along the extending direction of the bottle bottom 3.

According to the invention, the blocking interlayer 4 is arranged in the bottle bottom 3 along the extending direction of the bottle bottom 3, and the blocking interlayer 4 can block light, gas and moisture, so that the bottle bottom 3 can block light, substances such as air and moisture which have influence on the shelf life and freshness preservation of the content, and the like, can prevent the entry of gases such as external oxygen and the like into a blocking bottle, prevent the loss of gases such as carbon dioxide and the like in the blocking bottle, and effectively eliminate blocking holes at the bottom of the bottle body. The separation interlayer 4 is only arranged at the bottle bottom 3, the bottle body 1 and the bottle mouth 2 are made of PET materials without adding the separation agent, the usage amount of the separation agent materials is greatly reduced, the recycling of the PET materials at the later stage is ensured, the recycling workload and the recycling difficulty are greatly reduced, the separation interlayer is suitable for being widely popularized and used, the separation interlayer 4 is positioned in the bottle bottom 3, the separation interlayer 4 can be protected, the damage of the separation interlayer 4 is avoided, and the service life of the separation bottle is prolonged.

Further, the bottle body 1, the bottle mouth 2 and the bottle bottom 3 can be made of PET materials, but not limited to PET materials, and no light inhibitor and no oxygen inhibitor are added into the PET materials for making the bottle body 1, the bottle mouth 2 and the bottle bottom 3.

Further, the bottle body 1, the bottle mouth 2 and the bottle bottom 3 are integrally formed.

Further, the area of the blocking interlayer 4 is larger than or equal to the area of the circular central area 301 at the bottom of the bottle bottom 3, and the thickness of the blocking interlayer 4 is larger than or equal to 0.05 mm, so that the purpose of blocking light can be achieved by the blocking interlayer 4, and the normal thickness of the bottle bottom 3 is not influenced.

Further, the barrier interlayer 4 may be made of, but not limited to, a barrier nylon material, an ethylene material, a vinyl alcohol copolymer material, a carbon black material, or a mixed material of an oxygen inhibitor and carbon black.

In an alternative embodiment of the present invention, as shown in fig. 3, a full-blocking label 6 is provided on the outer wall of the bottle body 1, a blocking layer capable of blocking light is provided on the side of the full-blocking label 6 close to the bottle body 1, the top of the full-blocking label 6 extends to the bottom of the bottle mouth 2, and the bottom of the full-blocking label 6 extends to the top of the bottle bottom 3. Through the cooperation of the full-barrier label 6 and the barrier interlayer 4, the whole barrier effect of the bottle body can be achieved, the requirement of the content on the barrier property is met, and the shelf life of the content is greatly prolonged.

Specifically, the full-blocking label 6 is of a lamellar structure, the full-blocking label 6 is fixedly sleeved on the outer side of the bottle body 1 along the circumferential direction of the bottle body 1, and the side surface of the full-blocking label 6, which is close to the bottle body 1, is attached to the outer wall of the bottle body 1, so that good blocking effect of the full-blocking label 6 on the bottle body 1 is ensured.

Further, the barrier layer may be made of, but is not limited to, carbon black.

In an alternative embodiment of the present invention, as shown in fig. 3, a bottle cap 5 capable of blocking light, gas and moisture is capped at the bottle mouth 2, and the cooperation of the bottle cap 5, the full-blocking label 6 and the blocking interlayer 4 ensures that the blocking effect can be achieved at all parts of the blocking bottle as a whole.

Further, the bottle cap 5 can be made of, but not limited to, PET material, and a light blocking agent and an oxygen blocking agent are added into the PET material for making the bottle cap 5, so that the effect of blocking light, gas and moisture of the bottle cap 5 is achieved.

The barrier bottle of the invention has the characteristics and advantages that:

1. This separation bottle is provided with separation intermediate layer 4 at the inside of bottle end 3 along the extending direction of bottle end 3, can carry out the separation to light, gas and moisture through separation intermediate layer 4 for bottle end 3 can enough separation light, can separate air and moisture again, has eliminated the separation leak of bottle bottom, has significantly reduced the quantity of use of the separation agent material that the separation bottle adopted, guarantees the recycling of later stage PET material, has also greatly alleviateed recovery work volume and recovery degree of difficulty, is suitable for using widely on a large scale.

2. The separation intermediate layer 4 of this separation bottle is located the inside of bottle end 3, and bottle end 3 can play the effect of protection to separation intermediate layer 4, avoids separation intermediate layer 4 impaired, guarantees the good separation effect of separation intermediate layer 4, prolongs the life of separation bottle.

3. This separation bottle is provided with full separation label 6 on the outer wall of body 1, and the top of separation intermediate layer 4 is covered to the bottom of full separation label 6, carries out effectual separation to the whole body through the cooperation of full separation label 6 and separation intermediate layer 4, satisfies the content and to the requirement of separation performance, has prolonged the shelf life of content greatly.

Example two

As shown in fig. 6 to 9, the present invention provides a method for manufacturing a barrier bottle, which includes the following steps:

step S1: the semi-finished bottle body (i.e. bottle blank) shown in fig. 6 is manufactured by adopting the multi-layer double-screw injection molding equipment 9, wherein the process of processing the bottle blank in the step S1 comprises the following steps:

step S101: injecting the bottle body raw material in a molten state into a bottle blank mold 902, and performing injection molding on the bottle blank from the direction from a bottle mouth 2 to a bottle bottom 3;

Step S102: when the bottle body raw material completes the injection molding of the bottle body 1 and the bottle bottom 3 is not subjected to the injection molding, injecting the blocking interlayer raw material in a molten state into the middle part of the bottle body raw material, injecting the blocking interlayer raw material into the bottle blank mold 902 along with the bottle body raw material, and injecting the bottle bottom raw material to form the bottle bottom 3, wherein the blocking interlayer raw material forms a blocking interlayer 4 in the bottle bottom 3;

step S2: stretching the bottle body 1 and the bottle bottom 3 of the bottle blank by adopting bottle blowing machine equipment, so that the barrier interlayer 4 is synchronously stretched along with the bottle bottom 3;

Step S3: high-pressure air is introduced into the accommodating cavity 101 from the bottle opening 2 by adopting bottle blowing machine equipment, the bottle body 1 and the bottle bottom 3 of the bottle blank are fully expanded in the bottle blank mould 902 under the blowing of the high-pressure air, and the barrier interlayer 4 is filled at the bottom of the bottle blank mould 902 along the extending direction of the bottle bottom 3, so that the manufacturing of the barrier bottle is completed.

Step S4: the bottle mouth 2 of the barrier bottle is covered with a bottle cap 5, and the outer side of the bottle body 1 of the barrier bottle is fixedly sleeved with a full barrier label 6.

In an alternative embodiment of the present invention, as shown in fig. 8 to 9, in step S2, the stretching rod 7 of the bottle blowing machine is extended from the bottle mouth 2 of the bottle preform into the accommodating cavity 101, and the bottom end of the stretching rod 7 abuts against the inner wall of the bottle bottom 3, so that the bottle bottom 3 of the bottle preform stretches toward the bottom of the bottle preform mold 902, and at this time, the barrier interlayer 4 in the bottle bottom 3 completes stretching synchronously with the bottle bottom 3.

Further, the bottle body raw material can be, but not limited to, PET material; the barrier interlayer material may be, but is not limited to, a barrier nylon material, an ethylene material, a vinyl alcohol copolymer material, a carbon black material, or a combination of an oxygen barrier and carbon black material.

Specifically, as shown in fig. 4 and 5, the multi-layer double-screw injection molding device 9 includes a bracket 901, a bottle blank mold 902, a first outer shell 903 with bottle body raw materials inside and a second outer shell 905 with barrier interlayer raw materials inside, wherein the bottle blank mold 902, the first outer shell 903 and the second outer shell 905 are all fixedly arranged at the top of the bracket 901, the first outer shell 903 is of a cylindrical structure arranged along the horizontal direction, a first material containing cavity 9031 is formed in the first outer shell 903, one end of the first outer shell 903 is provided with a funnel-shaped first material adding port 9032, the first material adding port 9032 is communicated with the first material containing cavity 9031, the other end of the first outer shell 903 is provided with a first material outlet 9033 communicated with the first material containing cavity 9031, the first material outlet 9033 is connected with one end of a first valve needle 909, the other end of the first valve needle 909 is connected with the bottom of the bottle blank mold 902, and a main screw 904 can be rotatably arranged in the first material containing cavity 9031; the second housing 905 is a cylindrical structure arranged along the horizontal direction, a second material containing cavity 9051 is formed in the second housing 905, a funnel-shaped second material adding port 9052 is formed in one end of the second housing 905, the second material adding port 9052 is communicated with the second material containing cavity 9051, a second material outlet 9053 communicated with the second material containing cavity 9051 is formed in the other end of the second housing 905, the second material outlet 9053 is connected with one end of the second valve needle 908 through a material conveying hose 907, the other end of the second valve needle 908 penetrates through the side wall, close to one end of the first material outlet 9033, of the first housing 903 and stretches into the central axis position of the first material containing cavity 9031, and a secondary screw 906 is rotatably arranged in the second material containing cavity 9051.

Further, the main screw 904 and the sub screw 906 are driven by motors, respectively.

The working principle of the multi-layer double-screw injection molding equipment 9 is as follows: the bottle raw material is added into the first material containing cavity 9031 through the first material adding port 9032, the separation interlayer raw material is added into the second material containing cavity 9051 through the second material adding port 9052, only the main screw rod 904 is controlled to rotate in the injection molding process of the bottle mouth 2 and the bottle body 1 of the bottle blank, the main screw rod 904 extrudes and pushes the bottle raw material in the first material containing cavity 9031 in a molten state, and the bottle raw material is sequentially injected into the bottle blank mold 902 through the first material outlet 9033 and the first valve needle 909, so that the injection molding of the bottle mouth 2 and the bottle body 1 of the bottle blank is completed. When injection molding of the bottle mouth 2 and the bottle body 1 is completed and injection molding of the bottle bottom 3 is not performed, the main screw rod 904 and the auxiliary screw rod 906 are controlled to rotate simultaneously, the auxiliary screw rod 906 extrudes and pushes the blocking interlayer raw material in a molten state in the second material containing cavity 9051, the blocking interlayer raw material sequentially passes through the second material outlet 9053, the material conveying hose 907 and the second valve needle 908 to be injected into the middle part of the bottle raw material, the main screw rod 904 extrudes and pushes the bottle raw material in the molten state in the first material containing cavity 9031 and the blocking interlayer raw material positioned in the middle part of the bottle raw material, the bottle raw material and the blocking interlayer raw material sequentially pass through the first material outlet 9033 and the first valve needle 909 to be injected into the bottle blank mold 902, injection molding of the bottle bottom 3 of a bottle blank is completed, and the blocking interlayer 4 is formed in the middle part of the bottle bottom 3.

The manufacturing method of the barrier bottle has the characteristics and advantages that:

According to the manufacturing method of the barrier bottle, the multilayer double-screw injection molding equipment 9 is adopted for injection molding of bottle blanks, the bottle mouth 2 and the bottle body 1 are both made of PET materials, when injection molding of the bottle mouth 2 and the bottle body 1 is completed and injection molding of the bottle bottom 3 is not carried out, the barrier interlayer raw material is injected into the middle part of the PET materials, the bottle bottom 3 is injection molded, meanwhile, the barrier interlayer 4 is formed in the bottle bottom 3, the manufacturing method is simple, the operation is convenient, light rays, gas and moisture can be blocked through the barrier interlayer 4, the bottle bottom 3 can be blocked by the light rays and the air and the moisture, blocking holes at the bottom of the bottle body are eliminated, the using amount of the blocking agent materials adopted by the barrier bottle is greatly reduced, recycling of the PET materials at the later stage is guaranteed, the recycling workload and recycling difficulty are greatly reduced, the method is suitable for being widely popularized and used, the barrier interlayer 4 is matched with the full barrier label 6, the whole bottle body can be effectively blocked, the requirements of the content on the barrier performance are met, and the shelf life of the content is greatly prolonged.

The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this invention, and are intended to be within the scope of this invention.

Claims

1. The manufacturing method of the barrier bottle is characterized by comprising the following steps of:

Step S101: injecting a bottle body raw material in a molten state into a bottle blank mold (902), and performing injection molding on the bottle blank from a bottle opening (2) to a bottle bottom (3);

Step S102: when the bottle body raw material completes injection molding of the bottle body (1) and does not perform injection molding on the bottle bottom (3), injecting a blocking interlayer raw material in a molten state into the middle part of the bottle body raw material, wherein the blocking interlayer raw material is injected into the bottle blank mold (902) along with the bottle body raw material, the bottle bottom raw material is injected to form the bottle bottom (3), and the blocking interlayer raw material forms a blocking interlayer (4) in the bottle bottom (3);

step S2: stretching the bottle body (1) and the bottle bottom (3) of the bottle blank to enable the separation interlayer (4) to be stretched synchronously with the bottle bottom (3);

Step S3: high-pressure air is introduced into the accommodating cavity (101) from the bottle opening (2), the bottle body (1) and the bottle bottom (3) of the bottle blank are fully expanded in the bottle blank mold (902) under the blowing of the high-pressure air, and the barrier interlayer (4) is filled at the bottom of the bottle blank mold (902) along the extending direction of the bottle bottom (3).

2. The method of manufacturing a barrier bottle according to claim 1, wherein in the step S2, a stretching rod (7) is inserted into the accommodating chamber (101) from the bottle mouth (2) of the bottle preform, and a bottom end of the stretching rod (7) abuts against an inner wall of the bottle bottom (3) so that the bottle bottom (3) of the bottle preform is stretched toward a bottom of the bottle preform mold (902).

3. The method for manufacturing the barrier bottle according to claim 1, wherein the bottle body is made of PET material; the barrier interlayer is made of barrier nylon, ethylene, vinyl alcohol copolymer, carbon black or a mixture of an oxygen inhibitor and carbon black.