CN114313609A - Liquid leakage prevention type paper bag and preparation method thereof - Google Patents
Liquid leakage prevention type paper bag and preparation method thereof Download PDFInfo
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- CN114313609A CN114313609A CN202210017312.8A CN202210017312A CN114313609A CN 114313609 A CN114313609 A CN 114313609A CN 202210017312 A CN202210017312 A CN 202210017312A CN 114313609 A CN114313609 A CN 114313609A
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- 239000007788 liquid Substances 0.000 title claims abstract description 51
- 230000002265 prevention Effects 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 230000035515 penetration Effects 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 239000000123 paper Substances 0.000 claims description 212
- 230000003014 reinforcing effect Effects 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 13
- 239000000853 adhesive Substances 0.000 claims description 12
- 230000001070 adhesive effect Effects 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 239000003292 glue Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 4
- 230000003449 preventive effect Effects 0.000 claims description 4
- 238000007731 hot pressing Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 210000000056 organ Anatomy 0.000 claims description 3
- 239000011087 paperboard Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 230000003405 preventing effect Effects 0.000 description 35
- 239000000835 fiber Substances 0.000 description 7
- 239000012466 permeate Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 229920002488 Hemicellulose Polymers 0.000 description 1
- 239000011111 cardboard Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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Abstract
The invention discloses a liquid leakage prevention paper bag which comprises paper and a penetration prevention layer, wherein the penetration prevention layer is coated on the inner side surface of the paper, two side edges of the paper, which are provided with the penetration prevention layer, are folded outwards and seal a lateral opening of the paper through opposite adhesion, and the bottom edge of the paper, which is provided with the penetration prevention layer, is folded outwards and seal the bottom opening of the paper through opposite adhesion, so that the paper forms a bag-shaped structure with an upward opening through folding and adhesion. The liquid leakage prevention paper bag has the advantages of high sealing performance and excellent leakage prevention effect. The invention also discloses a preparation method of the liquid leakage prevention paper bag.
Description
Technical Field
The invention relates to the field of paper bag manufacturing, in particular to a liquid leakage prevention paper bag and a preparation method thereof.
Background
As is well known, paper is a recyclable resource. The raw material for making paper mainly is plant fibre, and in addition to three main components of cellulose, hemicellulose and lignin, the raw material also contains other components with small content, such as resin and ash, etc.. Compared with plastic bags, the paper bag is made of trees as a raw material, is a renewable resource, and has the characteristics of degradability and recyclability, so that the paper bag is widely applied. The common paper bag has poor liquid resistance, and is easy to crack or break after meeting water, oil and the like, so that the strength of the common paper bag is reduced.
If chinese utility model patent 201620075835.8 discloses an express bag, including the bag body. The bag body is equipped with the sack, the bag body is close to the one end of sack is equipped with more than one and tears the line. The tearing line is an incising line or the thickness of the bag body at the tearing line is smaller than that of the bag body at the area outside the tearing line. This express delivery bag does not adopt waterproof measure, especially its bonding department, and such not enough can lead to the sack to intake in rainy day, damages the article in the sack.
In order to solve the above problem, chinese utility model patent 201720799005.4 discloses a waterproof paper bag is whole of sack not only carried out the water-proof measurements, has also set up waterproof banding at the side of the junction of sack, can avoid water to get into the expansion internal portion by the cross-section of expansion body in the junction of sack through waterproof banding, drenches the expansion body of paper, and then damages the structure of sack, avoids water further to enter into the sack in with the article damage in the paper bag.
The above paper bag product is applied to the outer package of express logistics packages, and is inspired by this, and can be also applied to the liquid leakage prevention type paper bag products such as shopping, food packaging, garbage packaging and the like in daily life, however, the applicant finds that when the above waterproof structure is applied to the daily paper bag, the liquid permeation phenomenon is easy to occur at the bonding part, most of the paper bags on the market are as shown in fig. 1, the bottom of the paper bag is sealed by two pieces of paper sheets 4 'folded into a trapezoid, but a gap exists at the overlapping part of the two pieces of paper sheets 4', so even if the above waterproof coating or structure is adopted, the liquid is easy to flow out from the gap when the liquid-containing articles are packaged; meanwhile, the prior liquid leakage prevention paper bag generally adopts a mode that a waterproof inner surface is attached to an outer surface which is not coated with a waterproof layer, liquid is easy to permeate through a fiber section of paper, and the leakage prevention effect is not ideal; in addition, the waterproof paper bag is firstly folded in the production sequence, and then glue films are respectively attached to the surface, the folding part and the adhering part of the paper bag, namely, glue is applied after folding, because the glue films formed by the glue are easily scratched in the subsequent folding process if the glue is sprayed by the equipment in the production process of the existing equipment, so that the folding part and the adhering part of the paper bag are particularly easily scratched to remove the glue, the sealing performance of the adhered paper bag is poor, and the waterproof failure is caused.
In order to solve the above problems, it is necessary to provide a liquid leakage preventing paper bag and a method for preparing the same.
Disclosure of Invention
The invention aims to provide a liquid leakage prevention type paper bag which has the advantages of high sealing performance and excellent leakage prevention effect.
Another object of the present invention is to provide a method for manufacturing a liquid leakage preventive paper bag having advantages of high sealability and excellent leakage prevention effect.
In order to achieve the above object, the present invention provides a liquid leakage preventing paper bag comprising a paper sheet and a liquid leakage preventing layer, wherein the inside surface of the paper sheet is coated with the liquid leakage preventing layer, both side edges of the paper sheet having the liquid leakage preventing layer are folded outwardly and the lateral opening of the paper sheet is sealed by opposite adhesion, and the bottom edge of the paper sheet having the liquid leakage preventing layer is folded outwardly and the bottom opening of the paper sheet is sealed by opposite adhesion, so that the paper sheet forms a bag-like structure with the opening facing upward by folding and adhesion.
Preferably, the bonded side edges are attached to the outer side of the bag-like structure by folding, and the bonded bottom edge is attached to the outer side of the bag-like structure by folding.
Preferably, the sides of the pouch-like structure formed by the paper are folded inwardly to form side creases.
Specifically, the sides form triangular folds by folding adjacent to the bottom opening.
Specifically, the pouch-like structure formed by the paper is folded to form a bottom fold, which is at the same height as the apex of the triangular fold.
Preferably, the bottom edge is formed with a triangular reinforcing triangle block by folding, and the reinforcing triangle block is folded inwards and adhered to the outer side surface of the bottom edge to reinforce the bottom of the bag-shaped structure.
Preferably, a handle is bonded to the top of the bag-shaped structure, and a paperboard capable of being folded upwards is formed on the handle in a die-cutting mode.
Compared with the prior art, the liquid leakage preventing paper bag comprises paper and a penetration preventing layer, wherein the penetration preventing layer is coated on the inner side surface of the paper, the inner side surface of the paper can form water and leakage prevention due to the arrangement of the penetration preventing layer, and the two side edges of the paper with the penetration preventing layer are folded outwards and are bonded oppositely to seal the lateral opening of the paper; the bottom edge of the paper with the anti-seepage layer is folded outwards and the bottom opening of the paper is sealed by opposite adhesion, the inner side paper with leak tightness is turned outwards to form two bottom edges and is adhered, so that the bottom opening of the paper is sealed, namely, the inner side in contact with the adhesion has leak tightness, the tightness is ensured, the phenomenon that liquid is easy to permeate through a fiber section of the paper due to the traditional mode that a waterproof inner surface is attached to the outer surface which is not coated with a waterproof layer is overcome, and the anti-seepage paper has the advantage of excellent anti-seepage effect; the paper is folded and bonded to form a bag-shaped structure with an upward opening, so that the liquid leakage preventing paper bag is formed.
In order to achieve the aim, the preparation method of the liquid leakage preventing paper bag provided by the invention specifically comprises the following steps:
(S1) preparing a flattened paper tube from the paper, the paper tube having a rectangular tube-shaped structure and having bottom openings, the sides of the paper tube in the left-right direction each having a side fold, the bottom of the paper tube being pre-pressed with a bottom fold;
(S2) folding the bottom opening up along the bottom fold and opening the bottom to fold into an octagonal configuration to form a new fold;
(S3) folding overlappingly to close the bottom opening to form another new fold;
(S4) reopening the bottom opening after the crease is formed;
(S5) opening the bottom opening of the paper tube to spread it out to form a rectangular slot having an opening;
(S6) pulling the rectangular groove of the paper tube outwards along the left and right sides of the paper tube, flattening the outer side surfaces of the two sides of the integrated structure to make the integrated structure in a vertical state, folding the two bottom edges of the paper with the anti-seepage layers outwards and sealing the bottom opening of the paper tube through opposite adhesion to form a bag-shaped structure with an upward opening, adhering the two bottom edges to form an integrated structure, and adhering the adhered and vertical bottom edges to the outer side surfaces of the bag-shaped structure through folding and flattening;
(S7) forming reinforcing triangular blocks at both sides of the bag-like structure by folding;
(S8) dispensing, namely, folding the reinforcing triangular blocks at the two sides inwards and adhering the reinforcing triangular blocks to the outer side face of the bottom edge.
Preferably, the step (S1) of preparing a flattened paper tube includes the steps of:
(S11) selecting paper with an anti-seepage coating, pulling out paper strips from the paper, applying longitudinal adhesive on the side edges of the paper, and applying transverse adhesive on the paper at intervals according to the design size of the paper;
(S12) pressing pre-pressing creases on the paper strips according to the length and the width of the opening of the paper bag main body, so that the paper bag forms a closed organ shape, and the lateral opening of the paper bag is of an arc-shaped structure;
(S13) making the lateral opening in a vertical state by pressing;
(S14) folding the two sides of the paper with the anti-seepage layers outwards, and melting the longitudinal adhesive and closing the lateral openings by hot pressing;
(S15) flattening inward along the side surface crease at the central line on the two side edges of the paper tube, and the bonded side edges are adhered to the outer side surface of the bag-shaped structure through folding and pressing;
(S16) cutting the paper strip into pieces at intervals according to the design size of the paper bag to form an organ-shaped paper tube.
Specifically, the step (S11) further includes applying a water film covering on the lateral adhesive applying position. Compared with the prior art, the preparation method of the liquid leakage preventing paper bag has the advantages that the lateral opening and the bottom opening of the paper are sealed through folding and bonding, so that the paper is folded and bonded to form a bag-shaped structure with an upward opening, and the liquid leakage preventing paper bag is formed.
Drawings
FIG. 1 is a perspective view of a prior art paper bag.
FIG. 2 is a perspective view of the liquid leakage preventing paper bag of the present invention.
FIG. 3 is a perspective view of another angle of the liquid leakage preventing paper bag of the present invention.
FIG. 4 is a schematic view of the internal structure of the liquid leakage preventive paper bag of the present invention.
FIG. 5 is a flow chart of a method for manufacturing the drip-proof paper bag of the present invention.
FIG. 6 is another flow chart of the method for manufacturing the drip-proof paper bag of the present invention.
Detailed Description
Referring to fig. 1 to 4, there is shown a specific structure of a liquid-tight paper bag 100 of the present invention for producing the liquid-tight paper bag 100 coated with a glue layer and then folded and adhered, the liquid-tight paper bag 100 of the present invention includes a paper sheet 1 and a permeation-proof layer 2, the inner side of the paper sheet 1 is coated with the permeation-proof layer 2, the entire inner side of the paper sheet 1 is coated with the permeation-proof layer 2, the permeation-proof layer 2 is disposed to make the inner side of the paper sheet 1 waterproof and leak-proof, two sides 11 of the paper sheet 1 having the permeation-proof layer 2 are folded outwards and adhered oppositely to seal a lateral opening 200a of the paper sheet 1, the inner side of the paper sheet 1 having the leakage-proof property is turned outwards to form the two sides 11 and adhered, so that the lateral opening 200a of the paper sheet 1, i.e. the inner side contacted with the adhesion has the leakage-proof property, thereby ensuring the sealing property, and overcoming the defect that the liquid easily passes through the paper sheet 1 in the conventional way of adhering the outer surface of the waterproof layer and the waterproof layer without coating the waterproof layer The phenomenon of fiber section penetration has the advantage of excellent leakage-proof effect; the bottom edge 12 of the paper 1 with the anti-seepage layer 2 is folded outwards and the bottom opening 200b of the paper 1 is sealed by opposite adhesion, the invention turns the inner side paper 1 with leak-proof property outwards to form two bottom edges 12 and adheres, thus sealing the bottom opening 200b of the paper 1, namely, the inner side contacted by adhesion has leak-proof property, thus ensuring the sealing property, overcoming the phenomenon that the liquid is easy to permeate through the fiber section of the paper 1 in the traditional mode that the waterproof inner surface is attached to the outer surface which is not coated with a waterproof layer, and having the advantage of excellent leak-proof effect; since the paper 1 is folded and adhered to seal the side opening 200a and the bottom opening 200b thereof, so that the paper 1 is folded and adhered to form the bag-like structure 200 with the upward opening, in the present embodiment, the bag-like structure 200 is folded to form a rectangular bag with the upward opening when unfolded, so as to form the liquid leakage preventing paper bag 100, the liquid leakage preventing paper bag 100 of the present invention has advantages of high sealability and excellent leakage preventing effect. More specifically, the following:
referring to fig. 1 to 4, the paper 1 is folded to form a vertical bag-like structure 200 with an upward opening. The side edges 11 after bonding are attached to the outer side surface of the bag-shaped structure 200 through folding, the two side edges 11 after bonding form an integrated structure together, the integrated structure can be attached to the outer side surface of the bag-shaped structure 200 through folding and pressing, the appearance is attractive, the influence on the use feeling caused by the protrusion of the side edges 11 is avoided, the bottom edges 12 after bonding are attached to the outer side surface of the bag-shaped structure 200 through folding, the bottom edges 12 after bonding form an integrated structure together, the integrated structure can be attached to the outer side surface of the bag-shaped structure 200 through folding and pressing, the appearance is attractive, and the influence on the use feeling caused by the protrusion of the side edges 11 is avoided,
referring to fig. 1 to 4, the side of the bag-shaped structure 200 formed by the paper 1 is folded inwards to form two side creases 13, the two side creases 13 are symmetrically arranged on two sides of the bag-shaped structure 200, the side 11 near the bottom opening 200b is folded to form a triangular crease 14, the bag-shaped structure 200 formed by the paper 1 is folded to form a bottom crease 15, the bottom crease 15 is horizontally arranged around one circle of the bag-shaped structure, the bottom crease 15 is at the same height as the top point of the triangular crease 14, and the bag-shaped structure 200 can be folded into a shape convenient to store by the two side creases 13, the triangular crease 14 and the bottom crease 15.
Referring to fig. 1 to 4, the bottom edge 12 is folded and formed with a triangular reinforcing triangle 16, the reinforcing triangle 16 is folded inward and adhered to the outer side of the bottom edge 12 to reinforce the bottom of the pouch-shaped structure 200, and the reinforcing triangle 16 can reinforce the bottom of the pouch-shaped structure 200.
Referring to fig. 1 to 4, a handle 3 is adhered to the top of the bag-shaped structure 200, and a cardboard capable of being folded upwards is die-cut on the handle 3 for convenient use.
The liquid leakage preventing paper bag 100 comprises paper 1 and a penetration preventing layer 2, wherein the penetration preventing layer 2 is coated on the inner side surface of the paper 1, the arrangement of the penetration preventing layer 2 can enable the inner side surface of the paper 1 to form water and leakage prevention, two side edges 11 of the paper 1 with the penetration preventing layer 2 are folded outwards and are bonded oppositely to seal a lateral opening 200a of the paper 1, the paper 1 with the leak-proof inner side surface is turned outwards to form the two side edges 11 and is bonded, so that the lateral opening 200a of the paper 1 is sealed, namely, the inner side surfaces contacted with bonding have leak-proof performance, the sealing performance is ensured, the phenomenon that liquid is easy to permeate through a fiber section of the paper 1 due to the fact that the traditional mode that the waterproof inner surface is bonded with the outer surface which is not coated with a waterproof layer is overcome, and the liquid leakage preventing paper bag has the advantage of excellent leakage preventing effect; the bottom edge 12 of the paper 1 with the anti-seepage layer 2 is folded outwards and the bottom opening 200b of the paper 1 is sealed by opposite adhesion, the invention turns the inner side paper 1 with leak-proof property outwards to form two bottom edges 12 and adheres, thus sealing the bottom opening 200b of the paper 1, namely, the inner side contacted by adhesion has leak-proof property, thus ensuring the sealing property, overcoming the phenomenon that the liquid is easy to permeate through the fiber section of the paper 1 in the traditional mode that the waterproof inner surface is attached to the outer surface which is not coated with a waterproof layer, and having the advantage of excellent leak-proof effect; since the paper 1 is folded and adhered to seal the side opening 200a and the bottom opening 200b thereof, so that the paper 1 is folded and adhered to form the bag-like structure 200 with the opening facing upward, thereby forming the liquid leakage preventing paper bag 100, the liquid leakage preventing paper bag 100 of the present invention has advantages of high sealability and excellent leakage preventing effect.
Specifically, as shown in fig. 5, a flow chart for preparing a liquid leakage preventing paper bag 100 according to the present invention, and a method for preparing a liquid leakage preventing paper bag 100, which is applied to the above-mentioned liquid leakage preventing paper bag 100, specifically include the following steps:
(S1) preparing a flattened paper tube from the paper sheet 1, the paper tube having a rectangular tube-like structure and having a bottom opening 200b, the paper tube having side creases 13 on each of left and right sides thereof, the bottom of the paper tube being pre-pressed with bottom creases 15;
(S2) folding the bottom opening 200b upwards along the bottom fold and opening the bottom to fold into an octagonal structure to form a new fold;
(S3) folding overlappingly to close the bottom opening 200b to form another new fold;
(S4) reopening the bottom opening after the crease is formed;
(S5) opening the bottom opening 200b of the paper tube to be unfolded to form a rectangular slot having an opening;
(S6) pulling the rectangular groove of the paper tube outwards along the two sides of the paper tube in the left-right direction (the pulling direction is indicated by an arrow F in figure 5), flattening the outer side surfaces at the two sides of the integrated structure to make the integrated structure in a vertical state, folding the two bottom edges 12 of the paper 1 with the anti-permeation layers 2 outwards and sealing the bottom opening 200b of the paper tube through opposite adhesion to form a bag-shaped structure 200 with an upward opening, adhering the two bottom edges 12 to form an integrated structure, and adhering the adhered and vertically-arranged bottom edges 12 to the outer side surfaces of the bag-shaped structure 200 through folding and flattening;
(S7) forming reinforcing triangular blocks 16 on both sides of the bag-like structure 200 by folding;
(S8) dispensing, namely, folding the reinforcing triangular blocks 16 at the two sides inwards and bonding the reinforcing triangular blocks to the outer side surface of the bottom edge 12;
(S9) unfolding the bag-like structure 200 from above to form a paper bag body;
(S10) coating adhesive on the opening of the paper bag main body to bond the handle 3 to obtain the finished paper bag.
As shown in fig. 6, further, the step (S1) of preparing a flattened paper tube includes the steps of:
(S11) selecting the paper 1 with the anti-seepage coating, pulling out the paper strips from the paper 1, applying longitudinal adhesive on the side edges 11 of the paper 1, and applying transverse adhesive on the paper 1 at intervals according to the design size of the paper 1;
(S12) pressing a pre-pressing crease on the paper strip according to the length and width of the mouth of the paper bag body, so that the paper bag forms a closed organ shape, and as shown in the step (S12) of fig. 6, the lateral opening 200a is in an arc-shaped structure;
(S13) making the lateral opening 200a in a vertical state by press fitting;
(S14) folding the two sides 11 of the paper 1 with the permeation-preventing layer 2 outward, melting the longitudinal adhesive by hot pressing and closing the lateral opening 200 a;
(S15) flattening inward along the side creases (13) at the central line of the two sides (11) of the paper tube, the bonded sides (11) being attached to the outer side of the bag-like structure (200) by folding and pressing;
(S16) cutting the paper strip into pieces at intervals according to the design size of the paper bag to form an organ-shaped paper tube.
Further, the step (S11) includes applying a water film covering on the lateral adhesive applying position.
The method for manufacturing the liquid leakage preventing paper bag 100 of the present invention forms the liquid leakage preventing paper bag 100 by folding and bonding the side opening 200a and the bottom opening 200b of the paper 1 so that the paper 1 is folded and bonded to form the bag-like structure 200 with the opening facing upward.
The above disclosure is only a preferred embodiment of the present invention, and certainly should not be taken as limiting the scope of the present invention, which is therefore intended to cover all equivalent changes and modifications within the scope of the present invention.
Claims (10)
1. A liquid leakage prevention type paper bag, characterized in that it comprises paper and a penetration prevention layer, wherein the penetration prevention layer is coated on the inner side surface of the paper, two side edges of the paper with the penetration prevention layer are folded outwards and seal the lateral opening of the paper through relative adhesion, the bottom edge of the paper with the penetration prevention layer is folded outwards and seal the bottom opening of the paper through relative adhesion, so that the paper forms a bag-shaped structure with an upward opening through folding and adhesion.
2. The leak-proof paper bag according to claim 1, wherein the adhered side edges are attached to the outer side surface of the bag-like structure by folding, and the adhered bottom edges are attached to the outer side surface of the bag-like structure by folding.
3. The liquid leakage prevention paper bag according to claim 1, wherein the sides of the bag-like structure formed of the paper sheet are folded inward to form side creases.
4. The leak resistant paper bag as defined in claim 3, wherein said sides are folded to form triangular folds adjacent said bottom opening.
5. The leak resistant paper bag according to claim 4, wherein the bag-like structure formed by the paper sheet is folded to form a bottom fold, the bottom fold being at the same height as the apex of the triangular fold.
6. The liquid leakage prevention paper bag according to claim 1, wherein a reinforcing triangular block having a triangular shape is formed by folding and forming the bottom edge, and the reinforcing triangular block is folded inward and adhered to an outer side surface of the bottom edge to reinforce the bottom of the bag-like structure.
7. The leak resistant paper bag of claim 1 wherein said bag is formed with handles bonded to the top of said bag, said handles being die cut from a sheet of paperboard folded over and over.
8. The preparation method of the liquid leakage prevention paper bag is characterized by comprising the following steps:
(S1) preparing a flattened paper tube from the paper, the paper tube having a rectangular tube-shaped structure and having bottom openings, the sides of the paper tube in the left-right direction each having a side fold, the bottom of the paper tube being pre-pressed with a bottom fold;
(S2) folding the bottom opening up along the bottom fold and opening the bottom to fold into an octagonal configuration to form a new fold;
(S3) folding overlappingly to close the bottom opening to form another new fold;
(S4) reopening the bottom opening after the crease is formed;
(S5) opening the bottom opening of the paper tube to spread it out to form a rectangular slot having an opening;
(S6) pulling the rectangular groove of the paper tube outwards along the left and right sides of the paper tube, flattening the outer side surfaces of the two sides of the integrated structure to make the integrated structure in a vertical state, folding the two bottom edges of the paper with the anti-seepage layers outwards and sealing the bottom opening of the paper tube through opposite adhesion to form a bag-shaped structure with an upward opening, adhering the two bottom edges to form an integrated structure, and adhering the adhered and vertical bottom edges to the outer side surfaces of the bag-shaped structure through folding and flattening;
(S7) forming reinforcing triangular blocks at both sides of the bag-like structure by folding;
(S8) dispensing, namely, folding the reinforcing triangular blocks at the two sides inwards and adhering the reinforcing triangular blocks to the outer side face of the bottom edge.
9. The process for manufacturing a liquid leakage preventive paper bag according to claim 8, wherein the step (S1) of manufacturing a flattened paper tube comprises the steps of:
(S11) selecting paper with an anti-seepage coating, pulling out paper strips from the paper, applying longitudinal adhesive on the side edges of the paper, and applying transverse adhesive on the paper at intervals according to the design size of the paper;
(S12) pressing pre-pressing creases on the paper strips according to the length and the width of the opening of the paper bag main body, so that the paper bag forms a closed organ shape, and the lateral opening of the paper bag is of an arc-shaped structure;
(S13) making the lateral opening in a vertical state by pressing;
(S14) folding the two sides of the paper with the anti-seepage layers outwards, and melting the longitudinal adhesive and closing the lateral openings by hot pressing;
(S15) flattening inward along the side surface crease at the central line on the two side edges of the paper tube, and the bonded side edges are adhered to the outer side surface of the bag-shaped structure through folding and pressing;
(S16) cutting the paper strip into pieces at intervals according to the design size of the paper bag to form an organ-shaped paper tube.
10. The method for manufacturing a liquid leakage preventive paper bag according to claim 9, wherein the step (S11) further comprises applying a water film covering on the lateral glue applying portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210017312.8A CN114313609A (en) | 2022-01-07 | 2022-01-07 | Liquid leakage prevention type paper bag and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210017312.8A CN114313609A (en) | 2022-01-07 | 2022-01-07 | Liquid leakage prevention type paper bag and preparation method thereof |
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| Publication Number | Publication Date |
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| CN114313609A true CN114313609A (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210017312.8A Pending CN114313609A (en) | 2022-01-07 | 2022-01-07 | Liquid leakage prevention type paper bag and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115674784A (en) * | 2022-11-15 | 2023-02-03 | 江西新明峰包装科技有限公司 | Manufacturing process of lining type valve bag |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208665756U (en) * | 2018-07-19 | 2019-03-29 | 云南创新新材料股份有限公司 | A kind of liquid food packaging box with Turn up hem |
| CN216888012U (en) * | 2022-01-07 | 2022-07-05 | 东莞市亚森机械有限公司 | Leak protection liquid type container bag |
-
2022
- 2022-01-07 CN CN202210017312.8A patent/CN114313609A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208665756U (en) * | 2018-07-19 | 2019-03-29 | 云南创新新材料股份有限公司 | A kind of liquid food packaging box with Turn up hem |
| CN216888012U (en) * | 2022-01-07 | 2022-07-05 | 东莞市亚森机械有限公司 | Leak protection liquid type container bag |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115674784A (en) * | 2022-11-15 | 2023-02-03 | 江西新明峰包装科技有限公司 | Manufacturing process of lining type valve bag |
| CN115674784B (en) * | 2022-11-15 | 2024-05-31 | 江西新明峰包装科技有限公司 | Manufacturing process of lining type valve bag |
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