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CN-224225672-U - Film container

CN224225672UCN 224225672 UCN224225672 UCN 224225672UCN-224225672-U

Abstract

The utility model relates to a film container, which comprises an outer film, wherein the outer film forms a bag body with a closed periphery and a closed bottom and only has an opening at the top, and is characterized by also comprising an inner film and a one-way valve, wherein the inner film and the outer film are sealed by at least two first sealing lines which encircle the opening of the bag body and are spaced at a certain distance, a gas column cavity is formed between the first sealing lines, the one-way valve is arranged between the inner film and the outer film, and the one-way valve enables gas to enter the gas column cavity from the outside to avoid reverse flow. The mouth edge can be kept in a certain shape when in use by adopting a simpler process and lower cost, so that articles can enter conveniently, and other positions are kept soft and easy to deform.

Inventors

  • CHEN XIAOFENG

Assignees

  • 浙江迪弗莱包装科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250519

Claims (12)

  1. 1. The film container comprises an outer film, wherein the outer film forms a bag body with a closed periphery and a closed bottom and an open top, and is characterized by further comprising an inner film and a one-way valve, wherein the inner film and the outer film are sealed by at least two first sealing lines which encircle the opening of the bag body and are spaced at a certain distance, a gas column cavity is formed between the first sealing lines, the one-way valve is arranged between the inner film and the outer film, and the gas can enter the gas column cavity from the outside to avoid reverse flow through the one-way valve.
  2. 2. The film container according to claim 1, wherein the outer film is in a complete ring shape or the outer film is folded in two from side to side so that the outer film is divided into a front film and a rear film of the bag body, and the side edges of the front film and the rear film of the bag body are sealed to form a ring shape, and the bottom edge of the ring-shaped outer film is sealed and the top edge of the ring-shaped outer film is not sealed to form the bag body.
  3. 3. The film container of claim 2, wherein the outer film is folded to form two side edges, the side edges are folded inwards to form side edge inwards folded areas, the bottom edges of the corresponding parts of the side edge inwards folded areas are sealed together with the bottom edges of the outer film, when the bag body is opened, the bottom area of the outer film can be unfolded to form the bottom surface of the bag body, and the side edge inwards folded areas can be unfolded to form the side wall of the bag body.
  4. 4. The film container according to claim 1, wherein the outer film is folded vertically to separate the outer film into a front film and a rear film, two sides of the front film are respectively sealed with two sides of the rear film to form the bag, top edges of the front film and the rear film are not sealed with each other to form a bag mouth, and the inner film is respectively sealed with the front film and the rear film by a first sealing line.
  5. 5. The film container of claim 2, wherein the bottom edge formed by folding the outer film into two is folded into a bag body to form a bottom edge inner folding area, the side edge of the corresponding part of the bottom edge inner folding area is jointly sealed with the side edges of the front film and the rear film of the bag body, and when the bag body is opened, the bottom edge inner folding area can be unfolded into the bottom of the bag body and the side edge area can be unfolded into the side wall of the bag body.
  6. 6. The film container according to claim 3 or 5, wherein the inner film and the outer film in the region of the gas column cavity are provided with weakened sealing which does not completely seal the gas column cavity but reduces the ventilation width of the gas column cavity, and the weakened sealing is arranged at the junction of the side surface of the bag body and the front and rear surfaces of the bag body.
  7. 7. The film container of claim 6, wherein the inner film is in a ring shape, the two first sealing lines are respectively close to two side edges of the inner film, and the inner film and the outer film are sealed by the first sealing lines only to form a single ventilated air column cavity.
  8. 8. The film container according to claim 6, wherein the inner film comprises a front inner film and a rear inner film, the front inner film and the rear inner film are respectively sealed with the front film and the rear film of the bag body through first sealing lines, the side edge of the front inner film is sealed with the side edge of the front film of the bag body, the side edge of the rear inner film is sealed with the side edge of the rear film of the bag body, and the air column cavities form two cavities on the front film of the bag body and the rear film of the bag body respectively.
  9. 9. The film container of claim 8, wherein the front inner film and the rear inner film of the inner film are formed by folding the inner film in half, the inner film is sealed in the outer film and can be folded in half along with the outer film, at least two second sealing lines are further arranged on the inner film and the outer film, an air column is formed between the second sealing lines, two ends of the air column are respectively communicated with two cavities of the air column cavity, and the one-way valve is only arranged on any one cavity.
  10. 10. The film container of claim 9, wherein the number of the ventilation columns is two, the two ventilation columns are respectively arranged near the weakened sealing points, and the ventilation columns extend from one cavity of the ventilation column cavity to the other cavity of the ventilation column cavity along one bag body wall surface, pass through the bottom surface of the bag body along the other bag body wall surface, and then extend to the other cavity of the ventilation column cavity along the other bag body wall surface.
  11. 11. The film container of claim 9, wherein no weakening structure is provided at the junction of the upper pocket wall surface and the lower pocket surface of the ventilation column.
  12. 12. The film container of claim 1, wherein the one-way valve comprises at least one air valve film, the upper end and the bottom of the air valve film are respectively crossed by a first sealing line, an air inlet is reserved at the upper end of the air valve film, the bottom of the air valve film is sealed with the outer film and the inner film, two side sealing lines are further arranged between the two first sealing lines on the one-way valve, and the side sealing lines extend downwards from the first sealing line at the upper end of the air valve film to the first sealing line near the bottom of the air valve film to form an air outlet.

Description

Film container Technical Field The utility model relates to the technical field of containers, in particular to a film container. Background Containers for carrying objects are an indispensable item in daily life, including barrels, basins, bags, etc. The history of these containers can be traced back to thousands of years ago, the earliest form being probably made of wood. With the development of human civilization and the advancement of technology, the design and manufacturing materials of containers have undergone significant changes, from the original wood structure to the various materials of today's plastics, metals, etc. Among them, the application of plastic containers is not so extensive, and common plastic bags and plastic drums are included. The plastic bag is characterized by thin and soft wall, the opening edge of the plastic bag cannot keep a fixed shape generally, the plastic barrel is characterized by thick wall and hard wall, the opening edge of the plastic bag can keep a fixed shape generally, the opening edge and the plastic barrel have obvious limit on a use scene, and a great difference exists in material consumption. However, in some use scenarios, the user may wish to keep the container rim in a certain shape during use to facilitate entry of the article, but at the same time the wall portion of the container need not be particularly thick, on the one hand the thin plastic film provides the required strength, and on the other hand the wall portion may need to remain soft and flexible to accommodate the use scenario. A common solution to the above problems is to take a ring or tub of a fixed shape and then attach the rim of the film bag to the ring or tub. Obviously, such a solution usually requires two parts to be combined to be implemented, which is costly and complex to manufacture. Disclosure of utility model Aiming at the defects existing in the prior art, the technical problem to be solved by the utility model is to provide a film container which adopts a simpler process and lower cost, and can not only realize that the mouth edge keeps a certain shape when in use so as to facilitate the entry of articles, but also keep soft and easy to deform at other positions. In order to solve the technical problems, the utility model provides a film container, which comprises an outer film, wherein the outer film forms a bag body with a closed periphery and a closed bottom and only has an opening at the top, and the film container is characterized by also comprising an inner film and a one-way valve, wherein the inner film and the outer film are sealed by at least two first sealing lines which encircle the opening of the bag body and are spaced at a certain distance, a gas column cavity is formed between the first sealing lines, the one-way valve is arranged between the inner film and the outer film, and the gas can enter the gas column cavity from the outside by the one-way valve to avoid reverse flow. As a first construction mode of the bag body, the outer layer film is in a complete ring shape, or the outer layer film is folded left and right to enable the outer layer film to be divided into a front bag body film and a rear bag body film, the side edges of the front bag body film and the rear bag body film are sealed to form a ring shape, and the bottom edge of the ring-shaped outer layer film is sealed while the top edge of the ring-shaped outer layer film is not sealed to form the bag body. Further, two side edges are formed after the outer layer films are folded, the side edges are folded inwards to form side edge inner folding areas after the bag body is turned inwards, the bottom edges of the corresponding parts of the side edge inner folding areas are jointly sealed with the bottom edges of the outer layer films, when the bag body is opened, the bottom area of the outer layer films can be unfolded to form the bottom surface of the bag body, and the side edge inner folding areas can be unfolded to form the side wall of the bag body. As a second construction mode of the bag body, the outer layer film is folded up and down to enable the outer layer film to be divided into a front bag body film and a rear bag body film, two side edges of the front bag body film are respectively sealed with two side edges of the rear bag body film to form the bag body, the top edges of the front bag body film and the rear bag body film are not mutually sealed to form a bag body opening, and the inner layer film is respectively sealed with the front bag body film and the rear bag body film through first sealing lines. Further, the bottom edge formed after the outer film is folded in half is folded into the bag body to form a bottom edge inner folding area, the side edge of the corresponding part of the bottom edge inner folding area is jointly sealed with the side edges of the front bag body film and the rear bag body film, when the bag body is opened, the bottom edge inner folding area can be unfolded to