CN209889420U

CN209889420U - Paper bag

Info

Publication number: CN209889420U
Application number: CN201920609653.8U
Authority: CN
Inventors: 张昊; 梁锡沛
Original assignee: Jiangxi Xinmingfeng Packaging Technology Co Ltd
Current assignee: Jiangxi Xinmingfeng Packaging Technology Co Ltd
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2020-01-03
Anticipated expiration: 2029-04-29

Abstract

The utility model relates to a paper bag, which comprises a paper tube and a bag bottom formed by folding the end part of the paper tube, wherein the bag bottom comprises an upper folding edge, a lower folding edge, a front angle and a back angle, the upper folding edge and the lower folding edge are folded to form a valve port, a cylindrical film is arranged in the valve port, and the port of the cylindrical film, which is far away from the back angle, is folded into the paper tube to form a folding port of a sealed cylindrical film; the two sides of the cylindrical film corresponding to the upper and lower folded edges are folded back to one side of the paper tube and are adhered to the upper and lower folded edges; the outer side surface of the cylindrical membrane is stuck on the inner side surface of the valve port. The utility model discloses a set up the mouth of rolling over on the tube-shape membrane, reduce the material and flow out the phenomenon that causes the raise dust.

Description

Paper bag

Technical Field

The utility model belongs to the technical field of the technique of packing and specifically relates to a container bag is related to.

Background

Paper bags are widely used in daily life, and in industry, paper bags are generally used for packaging powder or granular materials.

The container bag of application is provided with the valve port in one side at the bottom of the bag usually among the existing industry, and the catheterization valve port that will convey likepowder or granular material is interior to pack into likepowder or granular material constantly toward the container bag and extract the pipe until the container bag is filled with the back, and the material can be full of whole container bag this moment, and the valve port can be compressed tightly by gas and the material in the container bag to play the effect of sealing the valve port.

The above prior art solutions have the following drawbacks: after filling, when the conduit is pulled out from the valve opening, part of materials can be taken out of the paper bag, and dust is easily generated.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a container bag has solved the phenomenon that causes the raise dust.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a paper bag comprises a paper tube and a bag bottom formed by folding the end part of the paper tube, wherein the bag bottom comprises an upper folding edge, a lower folding edge, a front angle and a rear angle, the upper folding edge and the lower folding edge are folded to form a valve port, a cylindrical film is arranged in the valve port, and a port of the cylindrical film, which is far away from the rear angle, is folded into the paper tube to form a folding port for sealing the cylindrical film; two sides of the cylindrical film corresponding to the upper folding edge and the lower folding edge are folded back to one side of the paper tube and are adhered to the upper folding edge and the lower folding edge; the outer side surface of the cylindrical membrane is pasted on the inner side surface of the valve port.

By adopting the technical scheme, when the paper tube is not filled with materials, the folded port seals the tube-shaped film; when materials need to be filled into the paper tube, the paper tube is bent towards the inside through the rear angle, and the upper folding edge and the lower folding edge are bent towards the direction far away from the paper tube, so that the ports of the cylindrical film attached to the rear angle, the upper folding edge and the lower folding edge can be synchronously opened, namely the folding port is in an open state; after the material is conveyed, when the guide pipe for conveying the material is drawn out from the cylindrical film, the folded opening is restored to the original state, the cylindrical film is sealed by the folded opening, the phenomenon that the material is taken out of the paper tube by the guide pipe is reduced, and dust is reduced.

The utility model discloses further set up to: the width of the cylindrical film is larger than that of the bag bottom, and the cylindrical film is folded along the creases of the upper folding edge and the lower folding edge at the side edges corresponding to the upper folding edge and the lower folding edge.

Through adopting above-mentioned technical scheme, the tube-shape membrane is folding along the crease of upper and lower hem, and this folding mode is comparatively simple, the operation of being convenient for.

The utility model discloses further set up to: the side surface of the cylindrical film back to the rear corner is adhered with an inner reinforcing strip, and the width of the inner reinforcing strip is larger than that of the cylindrical film; the inner reinforcing strip is folded towards one side back to the paper tube along the corresponding side edges of the upper folding edge and the lower folding edge; the inner reinforcing strip is adhered to the inner side surfaces of the upper and lower folded edges after being folded.

By adopting the technical scheme, the inner reinforcing strips are adhered to the cylindrical membrane, and the hardness of the cylindrical membrane can be enhanced through the inner reinforcing strips due to the fact that the cylindrical membrane is made of soft materials, so that the cylindrical membrane can be conveniently opened and closed; the side of interior reinforcement strip is folding towards fiber container one side dorsad, makes interior reinforcement strip also play the effect that compresses tightly to rolling over the mouth, makes holistic sealed effect better, and helps strengthening the stability of being connected between tube-shape membrane and the interior reinforcement strip.

The utility model discloses further set up to: the ratio range of the folded part of the cylindrical film to the width of the bag bottom is 1: (6-7), the ratio range of the folding opening to the width of the bag bottom is 1: (4-6).

Through adopting above-mentioned technical scheme, according to actual conditions's demand, the size of book mouth and folding is adjustable, makes the tube-shape membrane reach better sealed effect.

The utility model discloses further set up to: and an external reinforcing strip is stuck on the outer surface of the bag bottom.

Through adopting above-mentioned technical scheme, outer reinforcement strip helps the hardness at the bottom of the reinforcing bag to increase the life of container bag.

The utility model discloses further set up to: the cylindrical film is made of PE, and the thickness of the cylindrical film ranges from 15 microns to 20 microns.

By adopting the technical scheme, the Chinese name of the PE is polyethylene, the polyethylene is thermoplastic resin prepared by polymerizing ethylene, the polyethylene can resist corrosion of most of acid and alkali, the service life of the cylindrical film is prolonged, the specific material of the cylindrical film is PE, and the material has certain viscosity, so that the mutual adhesion of the cylindrical films can be accelerated, and the sealing effect is better.

The utility model discloses further set up to: the port of the cylindrical membrane is flush with the bottom edge of the rear corner.

By adopting the technical scheme, the cylindrical membrane is protected by the arrangement, the abrasion of the cylindrical membrane is reduced, and the service life of the cylindrical membrane is prolonged.

The utility model discloses further set up to: the two ends of the cylindrical membrane are communicated with each other, and the cylindrical membrane is of a structure that membrane units are integrally formed or two sides of a single membrane unit are adhered to each other or two sides of two membrane units are adhered to each other correspondingly.

Through adopting above-mentioned technical scheme, above-mentioned three different forms tube-shape membranes, this setting has stronger flexibility.

To sum up, the utility model discloses a beneficial technological effect does:

1. by arranging the folding opening, the folding opening seals the cylindrical film, namely, the effect of sealing the paper bag is achieved, the phenomenon that materials are brought out of the paper cylinder by the guide pipe is reduced, and the phenomenon of dust emission is reduced;

2. the hardness of the cylindrical membrane can be enhanced through the internal reinforcing strips, so that the cylindrical membrane can be conveniently opened and closed;

3. the outer reinforcing strips are helpful for enhancing the hardness of the bag bottom, so that the service life of the paper bag is prolonged;

4. by providing three different forms of tubular membranes, the arrangement is more flexible.

Drawings

Fig. 1 is a schematic structural diagram of the tubular membrane of the present invention.

Fig. 2 is a schematic structural view of the middle bag bottom opening of the utility model.

Fig. 3 is a schematic structural view of the present invention when the tubular film is adhered.

Fig. 4 is a schematic structural view of the inner reinforcement of the present invention.

Fig. 5 is a schematic structural view of the present invention when the outer reinforcement is adhered.

Fig. 6 is a schematic structural view of a folded portion of the middle inner reinforcement and the tubular membrane of the present invention.

Fig. 7 is a schematic structural view of the present invention when the tubular film is stretched.

Fig. 8 is a schematic structural view of a cylindrical membrane in example 1 of the present invention.

Fig. 9 is a schematic structural view of a cylindrical membrane in example 2 of the present invention.

Fig. 10 is a schematic structural view of a cylindrical membrane in example 3 of the present invention.

In the figure, 1, a paper tube; 2. a bag bottom; 21. folding the edges; 22. folding the lower edge; 23. a hook angle; 24. a relief angle; 3. a cylindrical film; 31. folding the opening; 4. an inner reinforcing strip; 5. an outer reinforcing strip; 6. and (6) folding.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1

Referring to fig. 1, for the utility model discloses a paper bag and preparation method thereof, tailor tubular membrane 3 to suitable size, the both ends of tubular membrane 3 link up each other, then fold a port that tubular membrane 3 runs through and form a book mouthful 31, should roll over a mouthful 31 and can seal a port that tubular membrane 3 corresponds. The cylindrical film 3 is formed by integrally molding a film unit (see fig. 8), and the cylindrical film 3 is specifically made of PE and has a thickness in the range of 15 to 20 μm.

Referring to fig. 2, a paper tube 1 is prefabricated, an end of the paper tube 1 is folded to form a bag bottom 2, the bag bottom 2 comprises an upper folding edge 21, a lower folding edge 22, a front angle 23 and a rear angle 24, the upper folding edge 21 and the lower folding edge 22 are respectively formed by folding the end of the bag bottom 2 along a folding line 6, the upper folding edge 21 and the lower folding edge 22 are symmetrically arranged, then the bag bottom 2 is unfolded at two ends of the upper folding edge 21 and the lower folding edge 22 to form the front angle 23 and the rear angle 24, the front angle 23 and the rear angle 24 are symmetrically arranged, and a valve port is formed by folding the rear angle 24 and the upper folding.

Referring to fig. 3, the cylindrical film 3 is arranged in the valve port, glue is sprayed at the rear corner 24, one end, away from the rear corner 24, of a folding opening 31 of the cylindrical film 3 is centrally attached to the rear corner 24, the end, close to the rear corner 24, of the cylindrical film 3 is flush with the bottom edge of the rear corner 24, the folding opening 31 is located in the paper tube 1, and the folding opening 31 is formed by folding the end, away from the rear corner 24, of the cylindrical film 3 into the paper tube 1. The width of the cylindrical film 3 is larger than that of the bag bottom 2, the folding length of the folding opening 31 can be adjusted according to actual requirements, and the proportion range of the folding opening 31 to the width of the bag bottom 2 is 1: (4-6), the sealing effect of the cylindrical film 3 is more excellent in this range.

Referring to fig. 4, the side of the cylindrical film 3 facing away from the rear corner 24 is sprayed with glue, and the inner reinforcing strip 4 is attached to the cylindrical film 3. The inner reinforcing strip 4 is adhered to the cylindrical membrane 3 in a centering manner, and the width of the inner reinforcing strip 4 is larger than that of the cylindrical membrane 3.

Referring to fig. 4 and 6, when upper flap 21 and lower flap 22 are folded along fold 6, respectively, cylindrical film 3 and inner reinforcing strip 4 are also simultaneously folded along fold 6 toward the side away from paper tube 1. According to practical requirements, the ratio range of the folded part of the cylindrical film 3 to the width of the bag bottom 2 is 1: (6-7), the folding of the cylindrical membrane 3 has the effect of pressing the folded opening 31, so that the folded opening 31 can be opened and restored to the original shape after being opened. After 4 folding of interior reinforcement strip paste with the medial surface of upper and lower hem 22, according to the demand of reality, the proportion scope of the part that the cylinder-shaped membrane 3 was folded and the part that interior reinforcement strip 4 was folded is 1: (1.5-3), the folding of the inner reinforcing strip 4 has a pressing effect on the folding port 31, and contributes to enhancing the connection stability of the inner reinforcing strip 4 and the cylindrical membrane 3; the inner reinforcing strip 4 is connected with the cylindrical membrane 3, so that the hardness of the cylindrical membrane 3 can be increased, and the cylindrical membrane 3 can be conveniently opened and closed.

Referring to fig. 5, an outer reinforcing strip 5 is attached to the outer surface of the bag bottom 2. In the present embodiment, the end surface of the outer reinforcing strip 5 close to the bag bottom 2 is in contact with the inner reinforcing strip 4, the upper flange 21, and the lower flange 22.

Referring to fig. 4 and 7, when the paper tube 1 needs to be filled with a material, the rear corner 24 is bent toward the inside of the paper tube 1, and the upper and lower folding edges 22 are bent away from the paper tube 1, so that the ports of the cylindrical film 3 attached to the rear corner 24 and the upper and lower folding edges 22 are opened synchronously, that is, the folding opening 31 is opened; when the material is conveyed, the guide pipe for conveying the material is drawn out from the cylindrical film 3, the folded port 31 is restored to the original state, the cylindrical film 3 is sealed by the folded port 31, the phenomenon that the material is carried out of the paper tube 1 by the guide pipe is reduced, and dust is reduced.

Specific example 2

Referring to fig. 9, the cylindrical film 3 has a structure in which both sides of a single film unit are adhered to each other, and is the same as in example 1 except for the above structural modification.

Specific example 3

Referring to fig. 10, the cylindrical film 3 has a structure in which both sides of two film units are attached correspondingly, and is the same as in example 1 except for the above structural modification.

The implementation principle of the embodiment is as follows: cutting the cylindrical membrane 3 to a proper size, enabling two ends of the cylindrical membrane 3 to be communicated with each other, and then folding one end opening through which the cylindrical membrane 3 is communicated to form a folded opening 31, wherein the folded opening 31 can seal one end opening corresponding to the cylindrical membrane 3; prefabricating a paper tube 1, and cutting an end part of the paper tube 1 to form an upper folding edge 21 and a lower folding edge 22; the bag bottom 2 is opened at two ends of the upper folding edge 21 and the lower folding edge 22 to form a front angle 23 and a rear angle 24; spraying glue at the rear angle 24, and attaching one end of the folding opening 31 of the cylindrical film 3, which is far away from the rear angle 24, to the rear angle 24 in a centering manner; spraying glue on the side surface of the cylindrical film 3 back to the rear corner 24, and sticking the inner reinforcing strip 4 on the cylindrical film 3; folding the upper folding edge 21 and the lower folding edge 22 in opposite directions, and simultaneously folding the two sides of the cylindrical membrane 3 and the inner reinforcing strip 4 corresponding to the upper folding edge 22 and the lower folding edge 22 along the crease 6 of the upper folding edge 22 and the lower folding edge 22 towards one side back to the paper tube 1; and (3) adhering an external reinforcing strip 5 on the bag bottom 2, thus finishing the preparation of the paper bag.

When the paper tube 1 is not filled with materials, the folded port 31 seals the tubular membrane 3; when the paper tube 1 needs to be filled with materials, the paper tube 1 is bent through the rear angle 24, and the upper and lower folding edges 22 are bent in the direction away from the paper tube 1, so that the ports of the cylindrical film 3 attached to the rear angle 24 and the upper and lower folding edges 22 are synchronously opened, namely the folding port 31 is opened; when the material is conveyed, the guide pipe for conveying the material is drawn out from the cylindrical film 3, the folded port 31 is restored to the original state, the cylindrical film 3 is sealed by the folded port 31, the phenomenon that the material is carried out of the paper tube 1 by the guide pipe is reduced, and dust is reduced.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A paper bag comprises a paper tube (1) and a bag bottom (2) formed by folding the end of the paper tube (1), wherein the bag bottom (2) comprises an upper folding edge (21), a lower folding edge (22), a front angle (23) and a rear angle (24), and the rear angle (24) and the upper folding edge (21) and the lower folding edge (22) are folded to form a valve port, which is characterized in that: a cylindrical film (3) is arranged in the valve port, and the port of the cylindrical film (3) far away from the rear angle (24) is folded into the paper tube (1) to form a folding port (31) for sealing the cylindrical film (3); the two sides of the cylindrical film (3) corresponding to the upper folding edge and the lower folding edge (22) are folded back to one side of the paper tube (1) and are adhered to the upper folding edge and the lower folding edge (22); the outer side surface of the cylindrical membrane (3) is pasted on the inner side surface of the valve port.

2. Paper bag according to claim 1, characterized in that: the width of the cylindrical film (3) is larger than that of the bag bottom (2), and the cylindrical film (3) is folded along the folding lines (6) of the upper folding edge (22) and the lower folding edge (22) at the side edges corresponding to the upper folding edge and the lower folding edge (22).

3. Paper bag according to claim 1, characterized in that: the side surface of the cylindrical film (3) back to the rear corner (24) is adhered with an inner reinforcing strip (4), and the width of the inner reinforcing strip (4) is greater than that of the cylindrical film (3); the inner reinforcing strip (4) is folded towards one side back to the paper tube (1) along the folding lines (6) of the upper folding edge (22) and the lower folding edge (22) at the side edges corresponding to the upper folding edge and the lower folding edge (22); the inner reinforcing strip (4) is adhered to the inner side surfaces of the upper and lower folded edges (22) after being folded.

4. Paper bag according to claim 1, characterized in that: the ratio range of the folded part of the cylindrical film (3) to the width of the bag bottom (2) is 1: (6-7), the ratio range of the width of the folding opening (31) to the width of the bag bottom (2) is 1: (4-6).

5. Paper bag according to claim 1, characterized in that: and an outer reinforcing strip (5) is stuck on the outer surface of the bag bottom (2).

6. Paper bag according to claim 1, characterized in that: the cylindrical membrane (3) is made of PE (polyethylene) and has a thickness ranging from 15 to 20 microns.

7. Paper bag according to claim 1, characterized in that: the end opening of the cylindrical membrane (3) is flush with the bottom edge of the rear angle (24).

8. Paper bag according to claim 1, characterized in that: the two ends of the cylindrical membrane (3) are communicated with each other, and the cylindrical membrane (3) is of a structure that membrane units are integrally formed or two sides of a single membrane unit are adhered to each other or two sides of two membrane units are adhered to each other correspondingly.