CN115417007A

CN115417007A - Novel easy-to-tear dry-wet separation bag, preparation process and heat-sealing layer film

Info

Publication number: CN115417007A
Application number: CN202210880557.3A
Authority: CN
Inventors: 权俊; 甘乐勇; 赵鹏伟; 胡优冰
Original assignee: Hangzhou God Color Printing Packaging Co ltd
Current assignee: Hangzhou God Color Printing Packaging Co ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2022-12-02
Anticipated expiration: 2042-07-25
Also published as: CN115417007B

Abstract

The invention relates to the technical field of packaging bags, in particular to a novel easy-to-tear dry-wet separation bag which comprises an inner packaging bag and a packaging outer layer arranged on the outer side of the inner packaging bag, wherein an isolation belt is arranged in the inner packaging bag, the inner packaging bag is separated into a first cavity and a second cavity through the isolation belt, the isolation belt comprises a sealing section and an easy-to-tear heat sealing section, two sides of the easy-to-tear heat sealing section are respectively provided with a hand tearing handle capable of extending outwards, the hand tearing handles are cut and formed through the packaging outer layer, a connecting part of the hand tearing handles and the packaging outer layer is arranged on the outer side of the easy-to-tear heat sealing section, the easy-to-tear heat sealing section is separated after being stretched outwards through the hand tearing handles on the two sides, and the first cavity and the second cavity are communicated through the separated easy-to-tear heat sealing section. Can form the hand under the condition that does not increase wrapping bag thickness and tear the pull handle to tear the pull handle through the hand and carry out quick separation to easily taking off heat-seal section.

Description

Novel easy-to-tear dry-wet separation bag, preparation process and heat-sealing layer film

Technical Field

The invention relates to the technical field of packaging bags, in particular to a novel easy-to-tear dry-wet separation bag, a preparation process and a heat-sealing layer film.

Background

The sealed packaging bag is a packaging product which is frequently encountered in the current life, and in order to form two dry-wet separation areas in the packaging bag, the dry-wet separation packaging bag is produced. When the existing dry-wet separation packaging bags are used, the dry-wet separation packaging bags on the market are usually packaged in two modes of extrusion mixing and independent external pull ring application. The squeezing type dry-wet separation bag is shown as a patent 202022979499.9 dry-wet separation facial mask bag and a facial mask bag shown as a skin care facial mask, and the dry-wet separation bag with a pull ring separately added is shown as a patent 201910925224.6 dry-wet separation facial mask packaging structure and a patent 202120754743.3 pull-open type dry-wet separation packaging bag. However, dry-wet separation bags have significant drawbacks: 1. the dry-wet separation bag adopting the extrusion mixing mode has poor use experience of consumers, high extrusion pressure, difficult use for ladies and higher risk of mutual extrusion mixing in the transportation process; 2. the wet and dry separation bag adopting the mode of separately adding pull rings has high cost, high manufacturing difficulty, high process requirement, low production efficiency, difficult formation of automatic production, large amount of manually added pull rings, and the material stiffness is easily formed along with the change of order quantity no matter the pull rings are heat-sealed or non-setting adhesive pull rings; simultaneously, the whole thickness of the wet-dry separation bag that adopts plus pull ring structure can increase to lead to packaging cost to improve, the wet-dry separation bag of pull ring form appears tearing phenomenon on a large scale very easily after dragging in addition, thereby lead to taking place like the disposable all condition that flows into facial mask cloth place cavity of liquid, can't control the flow of facial mask essence.

And often can use heat-seal layer film when making dry-wet separation bag, however, the required temperature and pressure of current heat-seal layer film when the heat-seal are higher, and heat-seal stability is poor, even under the heat-seal condition of the same temperature, pressure and time, it is also great to the heat-seal intensity fluctuation that forms after twice heat-seals to influence holistic heat-seal effect, appear the phenomenon that heat-seal intensity is excessive or heat-seal intensity is too low when appearing the heat-seal very easily.

Disclosure of Invention

In order to solve the problem that two cavities in the existing dry-wet separation bag are not easy to pull and communicate when in use, the invention provides a novel dry-wet separation bag easy to tear.

The invention provides a novel easy-to-uncover dry-wet separation bag, which adopts the following technical scheme:

the utility model provides a novel easily take off wet-dry separation bag, includes the inner packing bag, establishes the packing in the inner packing bag outside is outer, be equipped with an median in the inner packing bag, the inner packing bag passes through the median is separated and is formed first cavity and second cavity, the median includes canned paragraph and easily takes off the hot seal section, easily take off hot seal section both sides and all be equipped with the hand that can outwards stretch out and tear the handle, the hand tears the handle and passes through the shaping is tailor to the packing skin, the hand tear the handle with the outer connecting portion of packing are established easily take off the outside of hot seal section, easily take off the hot seal section and pass through both sides the hand tears the handle and produces the separation after outwards stretching, first cavity with the second cavity is through after the separation easily take off hot seal section intercommunication.

Through adopting above-mentioned technical scheme, when separating through the median between first cavity and the second cavity, because the median comprises the higher seal segment of fastness to connection and the easily detached heat-seal segment that easily takes off of pulling force, when the both sides of easily taking off the heat-seal segment received outside pulling force, can make easily take off the heat-seal segment and realize quick separation back and form the passageway, thereby make first cavity and second cavity realize intercommunication each other, for example, the liquid in the first cavity in the wet-dry separation facial mask bag is in the quick inflow second cavity of heat-seal segment that easily takes off through the separation. And at the in-process of easily taking off heat-seal section separation, when the separation range reachd the seal segment, can carry out the stop of quick realization passageway again and continue to enlarge, thereby make the liquid outflow efficiency in the first cavity controllable, when using, can avoid the disposable whole circumstances of flowing into the second cavity of all liquids to take place, when the liquid that contains in the first cavity is more, can carry out repetitious usage, and after the second cavity is unsealed, it is more convenient to the sealed of first cavity, effectual current dry and wet separation bag of having solved is tearing after the use, problem high to the resealing degree of difficulty of the bag body itself. Simultaneously, the hand tears the handle and directly processes the formation through the mode of tailorring by packing skin itself, and the connecting portion of hand tearing the handle is located outside easily taking off the heat-seal section, because the outer and hand of packing tears the handle and adopt integrated into one piece, can make the hand tear the whole laminating of handle outside the inner packing bag, thereby make dry wet separation bag not have outside bellied phenomenon, make whole dry wet separation bag can not increase whole thickness when increasing the hand tearing the handle, and when taking off the heat-seal section to easily and separating, only need directly hold the hand and tear the handle and outwards pull out, just can realize easily taking off the separation of heat-seal section, the effectual phenomenon of having solved the difficult separation of current easily taking off heat-seal section.

Optionally, the hand tears the handle with be equipped with the release agent between the inner packing bag, the hand tears the handle and passes through the release agent laminating is in on the inner packing bag.

Through adopting above-mentioned technical scheme, the hand tears to draw on the wrapping bag including the laminating of release agent, can make the hand tear to draw and realize closely laminating between handle and the inner wrapping bag, and peel strength 0 ~ 0.8N 15mm behind the compound of release agent, when needs tear the handle with the hand and separate from the inner wrapping bag and pull, can realize easy separation. The release agent mainly adopts one of the following components:

1. fluorine-containing release agent: it is characterized by that after coating, a solid layer with low surface tension is formed on the film surface, so that the composite glue has no adhesive force on its surface, and its release effect is that after compounding, its peel strength is 0-0.3N/15 mm

2. Silicon-containing release agent: it is characterized by that after coating, an oily layer with low surface tension is formed on the film surface, so that the composite glue has no adhesive force on its surface, and its release effect is that after compounding its peel strength is 0-0.5N/15 mm

3. Acrylic release agent: it is characterized in that after coating, a low-adhesion solid layer is formed on the film surface, the solid layer is easy to peel off from the film surface to form a release effect, and the release effect is that the peel strength after compounding is 0.2-0.8N/15 mm

Optionally, the hand tearing handle and the inner packaging bag are naturally layered, at least one link point is arranged between the hand tearing handle and the outer layer of the packaging bag, and the hand tearing handle is attached to the outer portion of the inner packaging bag through the link point.

Through adopting above-mentioned technical scheme, when adopting the nature layering between hand tearing handle and the inner packing bag, the hand tearing handle is generally connected through 1~3 chain joints with packing between the skin to make hand tearing handle paste the clothing outside the inner packing bag through the chain joint, when needs use, only need the outside simple knot of hand tearing handle to be drawn, just can be that the tie point produces the fracture, thereby make hand tearing handle realize easily buckling.

Optionally, the heat-seal width of the easy-to-tear heat-seal segment is smaller than the width of the seal segment, the easy-to-tear heat-seal segment at least comprises a peak protruding towards the inner side of the first cavity or the second cavity, and the connecting portion of the hand-tear handle is arranged on one side of the peak.

Through adopting the above-mentioned technical scheme, the span of easily taking off the heat-seal section is less than the width of seal segment, can make easily take off the heat-seal section and more easily separate when receiving tensile tearing, and simultaneously, easily take off the heat-seal section utensil and be formed with the peak valley structure when the heat-seal, and the hand tears the one side that the connecting portion of pulling the handle lie in the peak, can make easily take off the heat-seal section and realize tearing of a bit reaching when receiving the tensile force, make its separation simpler, simultaneously tearing the in-process, after easily taking off the whole backs of tearing of heat-seal section, the same power can't tear seal segment again, thereby make the tear length control of median more convenient, the current problem of tearing the structure directly tearing whole median directly whole or tearing on a large scale of having solved, it is more convenient to make the shutoff once more of seal segment, only need just can carry out the sealing of pertinence through a miniature clip.

In order to solve the problems of complex manufacturing process and large overall thickness of the existing dry-wet separation bag with a pull handle, the invention provides a second purpose of providing a manufacturing process of a novel easy-to-tear dry-wet separation bag.

A preparation process of a novel easy-to-tear dry-wet separation bag comprises the following steps: s1, manufacturing an inner single-side inner packaging bag: the single-side inner packaging bag sequentially comprises a barrier layer, an adhesive layer and an easy-to-tear heat sealing layer from outside to inside, and the easy-to-tear heat sealing layer is bonded and attached to the barrier layer by adopting a dry method compounding process to prepare a composite semi-finished product single-side inner packaging layer composite film;

s2, manufacturing a packaging outer layer: the outer packaging layer sequentially comprises a PET high-strength pull handle layer, an adhesive layer and a printing base film/ink layer from outside to inside, the printing ink layer takes PET and PA as materials of the printing base film, a printing film is prepared by adopting a printing process, namely the printing base film/ink layer, the printing base film/ink layer is compounded with the PET high-strength pull handle layer by adopting a dry compounding process, and a compound semi-finished product packaging outer layer composite film is prepared;

s3, after the packaging outer-layer composite film prepared in the step S2 is cured at a high temperature, cutting lines or windowing and die cutting treatment is carried out at a specified position through a positioning die cutting process, so that a hand-tearing pull handle with a pull handle function is formed on the packaging outer-layer composite film, and a local point connection or separation structure between a die cutting area and the packaging outer-layer composite film is formed after the hand-tearing pull handle is subjected to the die cutting treatment;

s4, compounding the outer packaging layer composite film with the hand-tearing handle on the inner packaging layer composite film through an adhesive layer, and laminating the outer packaging layer composite film and the inner packaging layer composite film by adopting a dry compounding process to prepare the single-side composite film of the dry-wet separation bag, wherein,

when the die cutting area of the hand-tearing handle is linked with the outer composite film of the package by local points, the hand-tearing handle is naturally separated from the inner composite film of the package layer, and the hand-tearing handle is attached to the outer side of the inner composite film of the package layer through the linking points;

when a separation structure is adopted between the die cutting area of the hand-tearing handle and the packaging outer-layer composite film, the packaging outer-layer composite film is coated with a release agent layer, and the hand-tearing handle is attached to the outer side of the inner packaging layer composite film through the release agent layer;

and S5, curing the two single-side composite membranes at high temperature, and then transferring to a bag making process to prepare the dry-wet separation bag.

Through adopting above-mentioned technical scheme, when producing manufacturing novel easily taking off wet-dry separation bag, can realize automated operation, and tear preparation simple process to the hand. Simultaneously, when the preparation packing is outer, the printing ink layer uses PET, PA as printing base film material, and draws the layer with one deck PET high strength in the outside, can make the hand tear draw the intensity of dragging of handle higher, effectual solved present with printing base film/printing ink layer directly appear breaking or dragging the phenomenon of deformation when tearing the basic unit of pulling the handle as the hand easily. When the prepared outer composite film of the package is cured at high temperature in the step S3, the outer composite film of the package is coiled into a high-temperature drying room, so that the glue is subjected to a cross-linking reaction, the temperature is generally 40-50 ℃, when an adversary tears to pull the handle to produce and mold in a die cutting mode, the cut is smoother, the molding is more convenient, the process is simpler, the problems of complex process, high manufacturing cost and low efficiency of the manufacture of the handle are effectively solved, and the outer composite film of the package can be manufactured in an automatic assembly line.

After the preparation process is adopted, the problems that the pull ring outside the existing dry-wet separation bag is high in cost, high in manufacturing difficulty, high in process requirement, low in production efficiency, difficult to form automatic production, large amount of manual pull rings are required to be added, the whole thickness of the dry-wet separation bag is increased, and the packaging cost is improved are effectively solved.

Optionally, the heat sealing pressure of the easy-to-tear heat sealing section is 0.1-0.5 MPa, the heat sealing temperature is 150 +/-30 ℃, and the heat sealing strength is 5 +/-2N/15 mm; the heat sealing pressure of the sealing section and the outer sealing edge in the dry-wet separation bag is 0.2-0.8 MPa, the heat sealing temperature is 200 +/-20 ℃, and the heat sealing strength is 12 +/-3N/15 mm.

Through adopting above-mentioned technical scheme, the heat-seal pressure, the temperature and the intensity of easily taking off the heat-seal section all are less than the heat-seal pressure, the temperature and the intensity of seal segment and outside sealed limit in the dry-wet separation bag, can make easily take off the heat-seal section and be able to make and easily take off the separation when tearing through the hand tear pull ring, simultaneously, can also guarantee that the compressive strength of easily taking off the heat-seal section after the heat-seal is not broken the bag under 40 kg's pressure to the difficult seepage of liquid.

Optionally, the barrier layer is one of an aluminum foil, an aluminum-plated film or an aluminum oxide-plated film.

Through adopting above-mentioned technical scheme, can make the inner packaging bag have good high separation nature and leakproofness.

Optionally, the PET high-strength pull handle layer is made of a high-strength PET film, the thickness of the PET high-strength pull handle layer is 12-60 μ, and the thickness of the easy-to-tear heat-sealing layer is 40-120 μ.

Through adopting above-mentioned technical scheme, when can making whole dry and wet separation bag's thickness thinner, the tensile strength that the handle was torn to the hand is higher, and the handle is torn to the hand and is difficult for appearing tearing apart.

The heat sealing strength of the existing heat sealing film is unstable, the heat sealing strength can only be achieved through high temperature, when the heat sealing temperature and the heat sealing pressure are consistent, the heat sealing strength of two times is inconsistent, the fluctuation is large,

the invention provides a preparation process of a novel easy-to-uncover dry-wet separation bag, which aims to solve the problem of unstable heat-seal strength of the existing heat-seal layer film due to the problem of unstable heat-seal strength of the existing heat-seal layer film after heat sealing.

The utility model provides an use novel easily to tear dry wet heat seal layer film of separation bag, its component of easily tearing off heat seal layer include polyethylene, polyethylene-vinyl acrylate and polyethylene-acrylic resin, inner packaging bag film adopts five layers to crowd blown film technology production altogether, inner packaging bag film's first three-layer adopts polyethylene resin, inner packaging bag film's fourth layer adopts the mixture of polyethylene and polyethylene-acrylic resin, the ratio of polyethylene with polyethylene-acrylic resin is 1:1, inner packaging bag film's fifth layer adopts the mixture of polyethylene and polyethylene-vinyl acrylate, the ratio of polyethylene with polyethylene-vinyl acrylate is 1:4.

by adopting the above technical solution, wherein the first three layers are made of a mixture of low density polyethylene and linear low density polyethylene, for example, by mixing low density polyethylene (2420H) and linear low density polyethylene (0220 AA), the heat-sealing layer film can effectively improve the overall strength through the first three layers. Meanwhile, a high-strength heat-sealing film layer with high viscosity can be formed through the fourth layer, and a bottom-strength heat-sealing film layer of the viscous bottom can be formed through the fifth layer, so that the heat-sealing film can form a double platform with stable heat-sealing strength through the fourth layer and the fifth layer.

When the heat-seal strength requirement is relatively low, in order to facilitate subsequent separation, after setting temperature and pressure through heat sealing equipment, make the fifth layer between two heat-seal layer films produce and bond each other, just can realize the effect of end heat-seal strength, and when the heat-seal strength requirement is higher, in order to guarantee the fastness of connecting, after only needing to set temperature and pressure through heat sealing equipment, make the fourth layer and the fifth layer between two heat-seal layer films all produce and bond each other, just can realize high heat-seal strength's effect. For example: the low heat-seal strength platform mainly provides heat-seal strength by fifth-layer resin, and adopts a heat-seal process with heat-seal pressure of 0.1-0.5 MPa and heat-seal temperature of 150 +/-30 ℃, and the heat-seal strength is 5 +/-2N/15 mm; and the high heat-seal strength platform mainly provides heat-seal strength by the fourth layer of resin, and adopts a heat-seal process with the heat-seal pressure of 0.2-0.8 MPa and the heat-seal temperature of 200 +/-20 ℃, and the heat-seal strength is 12 +/-3N/15 mm. The fourth layer is made of a mixture of polyethylene and polyethylene-acrylic acid resin, the ratio of the polyethylene to the polyethylene-acrylic acid resin is 1:1, the fifth layer is made of a mixture of polyethylene and polyethylene-vinyl acrylate, and the ratio of the polyethylene to the polyethylene-vinyl acrylate is 1:4, can make the heat-seal effect of heat-seal layer film more stable, when heat-seal temperature and pressure were unanimous, can make the intensity fluctuation after twice heat-seal littleer, the effectual problem of solving current heat-seal layer film and can't realize directly forming the seal segment of high bonding strength and the easy heat-seal segment of taking off that the base strength bonds through the heat-seal layer on same median.

Optionally, when the easy-to-tear heat-sealing layer is manufactured by adopting a five-layer co-extrusion film blowing process, the process steps comprise:

step 1, respectively feeding, mixing, melting and extruding five layers of resins forming the easy-to-uncover heat-seal layer by adopting five independent screws;

2, feeding the five layers of extruded molten resin into a die head through a runner, and stacking the molten resin in the die head from outside to inside in five layers;

step 3, uniformly extruding the five-layer stacked resin from a die orifice of a die head, performing transverse inflation and longitudinal stretching to enable the thickness of the film to reach a required thickness range, and cooling by adopting an internal circulation cooling system and an external blowing cooling system to obtain the heat-sealing layer film;

step 4, carrying out surface treatment on the cooled heat-sealing layer film through an online corona machine to enable the surface tension of a corona surface to be more than or equal to 38dyn;

and 5, cutting into required width and rolling.

In conclusion, the invention has the following beneficial effects:

1. the outer packaging layer is cut to form a hand tearing handle, the connecting part of the hand tearing handle is positioned outside the easy-to-tear heat sealing section, when the easy-to-tear heat sealing section is separated, the separation can be realized only by pulling the hand tearing handles on two sides of the easy-to-tear heat sealing section outwards, so that two cavities inside the outer packaging layer are communicated, and the hand tearing handle formed on the outer packaging layer does not need to be added with independent accessories and also does not need to be added with the whole thickness of the whole dry-wet separation bag, so that the problem that the heat sealing section of the extrusion mixing type dry-wet separation bag is not easy to separate is effectively solved, and the problems that the manufacturing cost of the dry-wet separation bag in an externally-added pull ring mode is high, the process is complex and the bag thickness is easy to increase are also solved;

2. because the median comprises the higher sealed section of the fastness of connection and the easy heat-seal section of taking off that receives the pulling force part easily, when the both sides of easily taking off the heat-seal section receive outside pulling force, can make easily take off the heat-seal section and realize quick separation back formation passageway to make the liquid in the first cavity take off the quick second cavity of flowing into of heat-seal section through the easy of separation. And at the in-process of easily taking off heat-seal section separation, when the separation range reachs the seal segment, can carry out the stop of quick realization passageway again and continue to enlarge, thereby make the liquid outflow efficiency in the first cavity controllable, the effectual uncontrollable problem of length after the wet-dry separation bag heat-seal section of having solved current wet-dry separation tears, can avoid the disposable whole condition of flowing into the second cavity of all liquids to take place, after the second cavity is unsealed, it is more convenient to the sealed of first cavity, the effectual current wet-dry separation bag of having solved is tearing the use back, the problem that the degree of difficulty is high once more to the sealed once more of the bag body itself.

Drawings

FIG. 1 is a schematic structural view of example 1 in the first embodiment of the present invention, showing the position structure of the hand-tear handle and the easy-open heat-seal segment when the inner bag and the outer package are combined;

FIG. 2 is a side view of a second embodiment of the present invention showing the separation of the inner bag and the outer layer of the package, and the location of the application of the release agent;

FIG. 3 is a side view of a third embodiment of the present invention showing the separation of the inner bag from the outer layer of the package and the connection of the tear handle to the outer layer of the package;

FIG. 4 is a flow chart of a process for preparing the wet and dry separation bags of the present invention;

in the figure: 1. a first cavity; 2. an isolation zone; 21. a sealing section; 22. the heat sealing section is easy to tear off; 3. a second cavity; 4. a hand tearing pull handle; 5. a peak top; 6. packaging in an inner bag; 7. packaging the outer layer; 8. a release agent; 9. and (4) linking points.

Detailed Description

The present invention is further described in detail below with reference to the accompanying drawings, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Embodiment 1, as shown in fig. 1, a novel easily take off wet and dry separation bag, include inner bag 6, establish the outer 7 of packing in the inner bag 6 outside, be equipped with an median 2 in the inner bag 6, inner bag 6 passes through median 2 is separated and is formed first cavity 1 and second cavity 3, median 2 includes seal segment 21 and easily takes off heat-seal segment 22, easily take off heat-seal segment 22 both sides and all be equipped with the hand that can outwards stretch out and tear handle 4, hand tears handle 4 and passes through the shaping is tailor to outer 7 of packing, hand tear handle 4 with the connecting portion of outer 7 of packing are established easily take off the outside of heat-seal segment 22, easily take off heat-seal segment 22 through both sides hand tear handle 4 produces the separation after the epilogue, first cavity 1 with second cavity 3 is through the easy taking off heat-seal segment 22 intercommunication after the separation.

In the use of the dry-wet separation bag, the dry-wet separation bag is mainly divided into an inner packaging bag 6 used for packaging dry products and liquid and a packaging outer layer 7 adhered to the outer side through a bonding agent, bag faces on two sides of the dry-wet separation bag are sealed through heat sealing equipment, an inner cavity of the dry-wet separation bag is divided into a first cavity 1 and a second cavity 3 which are separated from each other through a separation belt 2, one of the two sections is taken as an easy-to-uncover heat sealing section 22 to be subjected to heat sealing when the separation belt 2 is subjected to heat sealing through the heat sealing equipment, meanwhile, a connecting part is formed on the packaging outer layer 7 through modes of die cutting or cutting and the like and is also connected with a hand tearing handle 4, the connecting part of the hand tearing handle 4 is located on two sides of the easy-to-uncover heat sealing section 22, when liquid needs to flow into the second cavity 3 from the first cavity 1, the hand tearing handle 4 on two sides is only needed to be pinched and then pulled outwards, and the heat sealing can be simply carried out to enable the easy-to-uncover section 22 to form separation. When separating through median 2 between first cavity 1 and the second cavity 3, because median 2 comprises the higher seal segment 21 of fastness of connection and easily receives the tensile divided easily take off heat-seal segment 22, when easily taking off the both sides of heat-seal segment 22 and receiving outside tensile, can make easily take off heat-seal segment 22 and realize quick separation back formation passageway to make the liquid in the first cavity 1 through the quick inflow second cavity 3 of the easily taking off heat-seal segment 22 of separation. And at the in-process of easily taking off the separation of heat-seal section 22, when the separation range reachs seal section 21, can carry out the quick stopping that realizes the passageway again and continue to enlarge, thereby make the liquid outflow efficiency in the first cavity 1 controllable, when using, can avoid the disposable whole circumstances that flow in the second cavity 3 of all liquids to take place, when the liquid that contains in the first cavity 1 is more, can carry out repetitious usage, and after the second cavity 3 is unsealed, it is more convenient to the sealed of first cavity 1, the effectual current wet separation bag of doing of having solved is tearing the use back, the problem that the difficulty is high once more to the sealed of the bag body itself. Meanwhile, the hand tearing handle 4 is directly formed by processing the outer packaging layer 7 in a cutting mode, the connecting part of the hand tearing handle 4 is positioned outside the easy-to-tear heat-sealing section 22, the outer packaging layer 7 and the hand tearing handle 4 are integrally formed, the hand tearing handle 4 can be integrally attached to the outer packaging bag 6, and therefore the dry-wet separation bag is free of external protrusion, the whole dry-wet separation bag is not increased in the whole thickness when the hand tearing handle 4 is added, and when the easy-to-tear heat-sealing section 22 is separated, the hand tearing handle 4 is only required to be directly pinched and pulled out, the separation of the easy-to-tear heat-sealing section 22 can be achieved, and the problem that the existing easy-to-tear heat-sealing section 22 is not easy to separate is effectively solved.

Example 2: in addition to embodiment 1, as shown in fig. 2, a release agent 8 is further provided between the handle grip 4 and the inner packaging bag 6, and the handle grip 4 is attached to the inner packaging bag 6 through the release agent 8.

Because the separation state is formed after cutting between the periphery of the hand tearing handle 4 and the outer packaging layer 7, thereby leading to the fact that the hand tearing handle 4 can not be attached to the outer side surface of the inner packaging bag 6, the discomfort in appearance is easily caused during transportation or production, and the experience of sale and users is influenced, therefore, one layer of release agent 8 is coated on the region attached to the outer side of the inner packaging bag 6 and the hand tearing handle 4 during bag making, thereby leading the hand tearing handle 4 to be attached to the inner packaging bag 6 through the release agent 8, realizing the tight attachment between the hand tearing handle 4 and the inner packaging bag 6, and the composite post-peel strength of the release agent 8 is 0-0.8N/15 mm, when the hand tearing handle 4 is required to be separated from the inner packaging bag 6 for pulling, the easy separation can be realized. Wherein the release agent 8 mainly adopts one of the following components:

1. fluorine-containing release agent 8: it is characterized by that after coating, a solid layer with low surface tension is formed on the film surface, so that the composite glue has no adhesive force on its surface, and its release effect is that after compounding, its peel strength is 0-0.3N/15 mm

2. Silicon-containing release agent 8: it is characterized by that after coating, an oily layer with low surface tension is formed on the film surface, so that the composite glue has no adhesive force on its surface, and its release effect is that after compounding, its peel strength is 0-0.5N/15 mm

3. Acrylic release agent 8: it is characterized in that after coating, a low-adhesion solid layer is formed on the film surface, and is easy to peel off from the film surface to form a release effect, and the release effect is that the peel strength after compounding is 0.2-0.8N/15 mm

Example 3: in addition to the embodiment 1, as shown in fig. 3, there is a natural layering between the hand tearing handle 4 and the inner packaging bag 6, at least one linking point 9 is provided between the hand tearing handle 4 and the outer packaging layer 7, and the hand tearing handle 4 is attached to the outside of the inner packaging bag 6 through the linking point 9.

When the hand tearing handle 4 is cut, the cut area between the hand tearing handle 4 and the package outer layer 7 is connected through 1~3 uncut linking points 9, so that the hand tearing handle 4 is still on the same plane with the package outer layer 7 when the linking points 9 are not broken. Therefore, after the inner packaging bag 6 and the outer packaging layer 7 are compounded, the handle 4 can be attached to the inner packaging bag 6 without the release agent 8 by hand, and the process is simpler and more convenient during production. When the hand tearing handle 4 and the inner packaging bag 6 are naturally layered, the hand tearing handle 4 and the outer packaging layer 7 are generally connected through 1~3 link points 9, so that the hand tearing handle 4 is attached to the outer portion of the inner packaging bag 6 through the link points 9, when the hand tearing handle 4 needs to be used, the connection points can be broken only by simply buckling the hand tearing handle 4 outwards, and the hand tearing handle 4 can be easily buckled.

Example 4: in addition to embodiment 2 or embodiment 3, the improvement is that as shown in 1~3, the heat-seal width of the easy-open heat-seal segment 22 is smaller than the width of the seal segment 21, the easy-open heat-seal segment 22 at least includes a peak 5 protruding toward the inner side of the first cavity 1 or the second cavity 3, and the connecting portion of the hand-tear handle 4 is disposed on one side of the peak 5.

In the in-service use process, the span of easily taking off heat-seal section 22 is less than the width of seal section 21, can make easily take off heat-seal section 22 more easily separate when receiving tensile tearing, simultaneously, easily take off heat-seal section 22 utensil is formed with the peak valley structure when the heat-seal, and the hand tears the one side that the connecting portion of pulling handle 4 is located peak 5, can make easily take off heat-seal section 22 realize the tearing of a little arrival face when receiving the pulling force, make its separation simpler, simultaneously at the in-process of tearing, after easily taking off heat-seal section 22 and tearing entirely, same power can't tear seal section 21 again, thereby make the tear length control of median 2 more convenient, the effectual current problem of tearing the structure and directly tearing whole strip median 2 or tearing on a large scale of having solved, it is more convenient to make the shutoff once more of seal section 21, only need just can carry out the sealing of pertinence through a miniature clip.

Example 5: a preparation process for the novel easy-to-tear dry-wet separation bag described in example 4 comprises the following process steps:

a preparation process of a novel easy-to-uncover dry-wet separation bag comprises the following steps:

s1, manufacturing an inner single-side inner packaging bag 6: the single-side inner packaging bag 6 sequentially comprises a blocking layer, an adhesive layer and an easy-to-tear heat-sealing layer from outside to inside, and the easy-to-tear heat-sealing layer is bonded and attached to the blocking layer by adopting a dry-process compounding process to prepare a composite semi-finished single-side inner packaging layer composite film;

s2, manufacturing a packaging outer layer 7: the outer packaging layer 7 sequentially comprises a PET high-strength pull handle layer, an adhesive layer and a printing base film/ink layer from outside to inside, the printing ink layer takes PET and PA as printing base film materials, a printing film is prepared by adopting a printing process, namely the printing base film/ink layer, the printing base film/ink layer is compounded with the PET high-strength pull handle layer by adopting a dry method compounding process, and a compounded semi-finished product outer packaging layer composite film is prepared;

s3, after the packaging outer-layer composite film prepared in the step S2 is cured at a high temperature, cutting lines or windowing and die cutting treatment is carried out at a specified position through a positioning die cutting process, so that a hand tearing handle 4 with a handle pulling function is formed on the packaging outer-layer composite film, and a local point connection or separation structure between a die cutting area and the packaging outer-layer composite film is formed after the hand tearing handle 4 is subjected to the die cutting treatment;

s4, compounding the outer packaging layer composite film with the hand-tearing handle 4 on the inner packaging layer composite film through an adhesive layer, and laminating the outer packaging layer composite film and the inner packaging layer composite film by adopting a dry compounding process to prepare the single-side composite film of the dry-wet separation bag, wherein,

when the die cutting area of the hand-tearing handle 4 is linked with the outer composite film of the package by local points, the hand-tearing handle 4 is naturally separated from the inner composite film of the package layer, and the hand-tearing handle 4 is attached to the outer side of the inner composite film of the package layer through the linking point 9;

when a separation structure is adopted between the die cutting area of the hand-tearing handle 4 and the packaging outer-layer composite film, the packaging outer-layer composite film is coated with a release agent layer, and the hand-tearing handle 4 is attached to the outer side of the inner packaging layer composite film through the release agent layer;

When the dry-wet separation bag is produced and manufactured, the inner packaging bag 6 and the outer packaging layer 7 are respectively produced and formed through corresponding automatic composite equipment, wherein in the process of manufacturing the outer packaging layer 7, the step S3 is also added, the outer packaging composite film is subjected to cutting line or windowing die cutting treatment through the step S3, so that the hand tearing handle 4 integrated with the outer packaging composite film is formed, then the outer packaging composite film is compounded through the adhesive layer through the composite equipment to form a single-side dry-wet separation bag base surface on the inner packaging composite film, finally the dry-wet separation bag base surface is prepared into the dry-wet separation bag through bag making equipment, in the whole process of manufacturing the dry-wet separation bag, automatic production and simple process can be realized in the whole process, when the novel dry-wet separation bag is easily torn, automatic operation can be realized, and the preparation process for the hand tearing handle 4 is simple. The hand tearing handle 4 is close to the easy-to-tear heat-sealing section 22 of the dry-wet separation bag, and the hand tearing handle 4 can be pulled to pull the easy-to-tear heat-sealing section 22 of the dry-wet separation bag, so that the double cavities are communicated.

In the process of compounding the outer packaging layer composite film and the inner packaging layer composite film, if the die cutting area of the hand-tearing handle 4 is linked with the outer packaging layer composite film by local points, an adhesive layer and a release agent layer do not need to be coated outside the inner packaging layer composite film in the area corresponding to the hand-tearing handle 4, after compounding, the two layers are naturally separated, and the hand-tearing handle 4 can be naturally attached to the outer side of the inner packaging layer composite film through the linking point 9; and when adopting the cutting off type to tear between the piece when adopting between the cross cutting district of pulling handle 4 and the outer complex film of packing, then correspond in the outer complex film outside of packing and go regional coating release agent layer to make the hand tear pull handle 4 through the laminating of release agent layer in the outer complex film outside of packing, in order to prevent that the hand from tearing pull handle 4 outwards turns out, for example: and (3) locally coating a release agent 8 by positioning the printed film to form a low composite strength area on the part of the composite film, then die-cutting a pull handle shape tangent line in the low composite strength area, and finally preparing the pull handle on the material on the outer side of the bag.

The hand tears handle 4 directly at the outer complex film preparation in-process of packing with regard to direct forming, and the technology change is littleer, only needs to increase a cross cutting process behind the outer complex film shaping of packing and just can realize the shaping, and the technology improves more simply, and the effectual current system bag technology of having solved is when making the handle, and the problem of the technology degree of difficulty is high. Simultaneously, when the outer 7 of preparation packing, the printing ink layer uses PET, PA to be printing base film material, and draws the layer with one deck PET high strength in the outside, can make the hand tear draw 4 pull intensity higher, effectual solved present with printing base film/printing ink layer directly as the hand tear draw 4 the basic unit the time appear easily break or pull the phenomenon of deformation. When the prepared outer packaging composite film is cured at high temperature in the step S3 and the two single-side composite films in the step S5 are cured at high temperature, the composite films are rolled into a high-temperature drying room, so that the glue is subjected to a cross-linking reaction, the temperature of the high-temperature curing is generally 40-50 ℃, when the tearing pull handle 4 is produced and formed in a die cutting mode, the cut is smoother, the forming is more convenient, the process is simpler, the problems of complex manufacturing process, high manufacturing cost and low efficiency of the enjoying pull handle are effectively solved, and the outer packaging layer 7 can be manufactured in an automatic assembly line in the manufacturing process.

Example 6: the improvement is further carried out on the basis of the embodiment 5, the heat sealing pressure of the easy-to-tear heat sealing section 22 is 0.1-0.5 MPa, the heat sealing temperature is 150 +/-30 ℃, and the heat sealing strength is 5 +/-2N/15 mm; the heat sealing pressure of the sealing section 21 and the outer side sealing edge in the dry-wet separation bag is 0.2-0.8 MPa, the heat sealing temperature is 200 +/-20 ℃, and the heat sealing strength is 12 +/-3N/15 mm.

The heat sealing pressure of the easy-to-tear heat sealing section 22 is generally between 0.1 and 0.5MPa, the higher the pressure during heat sealing, the higher the strength after heat sealing, for example, when the heat sealing pressure is between 0.1 and 0.2MP, the heat sealing strength is generally between 3N/15mm, and when the heat sealing strength is 0.5MP, the heat sealing strength can reach 6 to 7N/15mm, the practical situation is adjusted according to the width of the easy-to-tear heat sealing section 22, when the width of the easy-to-tear heat sealing section 22 is larger, the required heat sealing pressure can be smaller, and simultaneously, the temperature is controlled to be 150 +/-30 ℃, so that the easy-to-tear heat sealing section 22 can realize hot melt sealing when passing through heat sealing, and the situation that the heat sealing strength is too large and the easy-to-tear can be avoided during heat sealing, the heat sealing parameters of the sealing section 21 and the outer sealing edge in the dry-wet separation bag are consistent, the firmness of the sealing area of the dry-wet separation bag can be consistent, the process is simpler, the heat sealing pressure of the sealing section 21 and the outer sealing edge in the common dry-wet separation bag is 0.5-0.8 MPa, the pressure is 0.2-0.3 MPa greater than that of the easy-to-tear heat sealing section 22, after the heat sealing temperature of 200 +/-20 ℃ is matched, the overall heat sealing strength can reach 12 +/-3N/15 mm, the final strength of the heat sealing area is different, the phenomenon that the sealing section 21 is torn by a connecting belt after the easy-to-tear heat sealing section 22 is torn is ensured, and the accuracy of the tearing range of the isolation belt 2 is ensured.

Wherein, easily take off heat-seal pressure, temperature and the intensity of heat-seal section 22 all are less than seal section 21 in the dry-wet separation bag and the heat-seal pressure, temperature and the intensity of outside seal limit, can make easily take off heat-seal section 22 resistant change the separation when tearing through hand tear pull ring, simultaneously, can also guarantee that easily take off the compressive strength of heat-seal section 22 after the heat-seal not broken bag under 40 kg's pressure to the difficult seepage of liquid.

In addition to the embodiment 5, the barrier layer is further improved by adopting one of aluminum foil, aluminum-plated film or aluminum oxide-plated film. The inner packing bag 6 can have good high barrier property and sealability.

The improvement is further improved on the basis of the embodiment 5, the high-strength PET film is adopted as the PET high-strength pull handle layer, the thickness of the PET high-strength pull handle layer is 12-60 mu, and the thickness of the easy-to-tear heat-sealing layer is 40-120 mu.

The PET high strength is drawn the layer and is adopted the high strength PET membrane, when can making the thickness of whole dry and wet separation bag thinner, guarantees that the tensile strength that the hand torn and draws 4 is higher, and the hand tears and draws 4 and be difficult for appearing tearing apart.

Example 7: the utility model provides an use novel easily to tear dry wet heat seal layer film of separation bag, its component of easily tearing off heat seal layer include polyethylene, polyethylene-vinyl acrylate and polyethylene-acrylic resin, inner packaging bag film adopts five layers to crowd blown film technology production altogether, inner packaging bag film's first three-layer adopts polyethylene resin, inner packaging bag film's fourth layer adopts the mixture of polyethylene and polyethylene-acrylic resin, the ratio of polyethylene with polyethylene-acrylic resin is 1:1, inner packaging bag film's fifth layer adopts the mixture of polyethylene and polyethylene-vinyl acrylate, the ratio of polyethylene with polyethylene-vinyl acrylate is 1:4.

since the conventional heat-seal layer film is not easily formed into the stable easy-to-tear heat-seal segment 22 when used as the easy-to-tear heat-seal layer of the inner pouch 6 in example 6, the heat-seal layer film is improved in that the former three layers are made of a mixture of low density polyethylene and linear low density polyethylene, for example, by mixing low density polyethylene (2420H) and linear low density polyethylene (0220 AA), and the heat-seal layer film can effectively improve the overall strength by the former three layers. Meanwhile, a high-strength heat sealing film layer with high viscosity can be formed through the fourth layer, and a bottom-strength heat sealing film layer with a viscous bottom can be formed through the fifth layer, so that a double platform with stable heat sealing strength can be formed by the heat sealing film through the fourth layer and the fifth layer, after the fifth layer with low heat sealing strength is bonded, a low heat sealing platform can be formed, so that the heat sealing sections 22 which are easy to uncover are more easily separated, and when the fourth layer with high heat sealing strength is bonded, a high heat sealing platform can be formed between the bags, so that the bags form peripheral heat sealing edges and sealing sections 21, and the heat sealing strength of a sealing area can be more stable through the fourth layer. The specific heat-sealing method is as follows:

when the requirement of heat-seal strength is relatively low, in order to facilitate subsequent separation, after temperature and pressure are set through heat-sealing equipment, the fifth layer between two heat-seal layer films is enabled to be mutually bonded, the effect of the heat-seal strength at the bottom can be realized, when the requirement of the heat-seal strength is relatively high, the connection firmness is ensured in order to facilitate, after the temperature and the pressure are set through the heat-sealing equipment, the fourth layer and the fifth layer between the two heat-seal layer films are enabled to be mutually bonded, and the effect of high heat-seal strength can be realized. For example: the low heat-seal strength platform mainly provides heat-seal strength by fifth-layer resin, and adopts a heat-seal process with heat-seal pressure of 0.1-0.5 MPa and heat-seal temperature of 150 +/-30 ℃, and the heat-seal strength is 5 +/-2N/15 mm; and the high heat-seal strength platform mainly provides heat-seal strength by the fourth layer of resin, and adopts a heat-seal process with the heat-seal pressure of 0.2-0.8 MPa and the heat-seal temperature of 200 +/-20 ℃, and the heat-seal strength is 12 +/-3N/15 mm. The fourth layer is made of a mixture of polyethylene and polyethylene-acrylic acid resin, the ratio of the polyethylene to the polyethylene-acrylic acid resin is 1:1, the fifth layer is made of a mixture of polyethylene and polyethylene-vinyl acrylate, and the ratio of the polyethylene to the polyethylene-vinyl acrylate is 1:4, can make the heat-seal effect of heat-seal layer film more stable, when heat-seal temperature and pressure were unanimous, can make the intensity fluctuation after twice heat-seal littleer, the effectual problem of solving current heat-seal layer film and can't realizing directly forming the seal segment 21 of high bonding strength and the easy heat-seal segment 22 of tearing off of end strength bonding through the heat-seal layer on same median 2.

The production method is further improved on the basis of the embodiment 7 that when the heat-sealing layer thin film is produced, the easy-to-uncover heat-sealing layer is produced by adopting a five-layer co-extrusion film blowing process, the process is simpler, and the specific steps comprise:

step 1, respectively feeding, mixing, melting and extruding five independent screws for five layers of resin forming the easy-to-uncover heat-sealing layer;

and 5, cutting into required width and rolling.

In the process of manufacturing the easy-to-uncover heat-sealing layer by the five-layer co-extrusion film blowing process, five layers of resins forming each layer are fed by five independent screws, mixed, melted and extruded, so that materials extruded by each layer form a corona layer, a bonding layer, a middle layer, a high heat-sealing strength layer and a bottom heat-sealing strength layer from outside to inside in sequence after entering a die head through a flow channel, wherein the corona layer, the bonding layer and the middle layer are formed by hot melting of a mixture of low-density polyethylene and linear low-density polyethylene, and when a stable base surface is formed for the high heat-sealing strength layer, the overall strength and the sealing performance of the heat-sealing layer film are better improved. After the five-layer stacked resin is uniformly extruded from the die orifice of the die head, the film thickness reaches the required thickness range through transverse inflation and longitudinal stretching, and the heat-sealing layer film is prepared after the film is cooled by adopting an internal circulation cooling system and an external blowing cooling system; finally, carrying out surface treatment on the cooled heat-sealing layer film through an online corona machine to ensure that the surface tension of a corona surface is more than or equal to 38dyn; and then cutting into the required width and rolling for the subsequent bag making process.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a novel easily take off wet-dry separation bag, includes inner packing bag (6), establishes outer (7) of packing in inner packing bag (6) outside, be equipped with an median (2) in inner packing bag (6), inner packing bag (6) are passed through first cavity (1) of formation and second cavity (3), its characterized in that are separated in median (2): the median (2) are including seal segment (21) and easily take off heat-seal section (22), easily take off heat-seal section (22) both sides and all be equipped with the hand that can outwards stretch out and tear handle (4), the hand tears handle (4) and passes through the shaping is tailor in the outer (7) of packing, the hand tear handle (4) with the connecting portion of the outer (7) of packing are established easily take off the outside of heat-seal section (22), easily take off heat-seal section (22) through both sides the hand tears and draws handle (4) production separation after the outwards stretching, first cavity (1) with second cavity (3) are through the separation easily take off heat-seal section (22) intercommunication.

2. The novel easy-to-tear dry-wet separation bag of claim 1, wherein: the handle is torn to the hand draw handle (4) with be equipped with release agent (8) between inner packing bag (6), the handle is torn to the hand draw handle (4) passes through release agent (8) laminating is in on inner packing bag (6).

3. The novel easy-to-tear dry-wet separation bag of claim 1, wherein: the hand tears and draws handle (4) with be natural layering between inner packing bag (6), hand tears draw handle (4) with be equipped with at least one linkage point (9) between outer (7) of packing, hand tears draw handle (4) through linkage point (9) subsides are in outside inner packing bag (6).

4. The novel easy-to-tear dry-wet separation bag of claim 1, wherein: the heat-seal width of easily taking off heat-seal section (22) is less than the width of seal section (21), easily take off heat-seal section (22) contain one at least to first cavity (1) or second cavity (3) inboard bellied crest (5), the connecting portion that the hand torn and pulled handle (4) are established one side of crest (5).

5. A novel preparation process of a dry-wet separation bag easy to uncover is characterized by comprising the following steps: the novel easy-to-tear dry-wet separation bag of claim 1, which is prepared by the following steps:

s1, manufacturing an inner single-side inner packaging bag (6): the single-side inner packaging bag (6) sequentially comprises a blocking layer, an adhesive layer and an easy-to-tear heat-sealing layer from outside to inside, and the easy-to-tear heat-sealing layer is bonded and attached to the blocking layer by adopting a dry compounding process to prepare a composite semi-finished product single-side inner packaging layer composite film;

s2, manufacturing a packaging outer layer (7): the outer packaging layer (7) sequentially comprises a PET high-strength pull handle layer, an adhesive layer and a printing base film/ink layer from outside to inside, the printing ink layer takes PET and PA as printing base film materials, a printing film is prepared by adopting a printing process, namely the printing base film/ink layer, the printing base film/ink layer is compounded with the PET high-strength pull handle layer by adopting a dry method compounding process, and a compound semi-finished product packaging outer layer composite film is prepared;

s3, after the packaging outer-layer composite film prepared in the step S2 is cured at a high temperature, cutting lines or windowing and die cutting treatment is carried out at a specified position through a positioning die cutting process, so that a hand-tearing pull handle (4) with a pull handle function is formed on the packaging outer-layer composite film, and a local point connection or separation structure between a die cutting area and the packaging outer-layer composite film is formed after the hand-tearing pull handle (4) is subjected to the die cutting treatment;

s4, compounding the outer packaging layer composite film with the hand-tearing handle (4) on the inner packaging layer composite film through an adhesive layer, and gluing the outer packaging layer composite film and the inner packaging layer composite film by adopting a dry compounding process to prepare the single-side composite film of the dry-wet separation bag, wherein,

when the die cutting area of the hand-tearing handle (4) is connected with the outer composite film of the package by local points, the hand-tearing handle (4) is naturally separated from the inner composite film of the package layer, and the hand-tearing handle (4) is attached to the outer side of the inner composite film of the package layer through the connecting points (9);

when a separation structure is adopted between the die cutting area of the hand-tearing handle (4) and the packaging outer-layer composite film, the packaging outer-layer composite film is coated with a release agent layer, and the hand-tearing handle (4) is attached to the outer side of the inner packaging layer composite film through the release agent layer;

6. The process for preparing a novel easy-to-tear dry-wet separation bag according to claim 5, wherein the process comprises the following steps: the heat sealing pressure of the easy-to-uncover heat sealing section (22) is 0.1-0.5 MPa, the heat sealing temperature is 150 +/-30 ℃, and the heat sealing strength is 5 +/-2N/15 mm; the heat sealing pressure of the sealing section (21) and the outer sealing edge in the dry-wet separation bag is 0.2-0.8 MPa, the heat sealing temperature is 200 +/-20 ℃, and the heat sealing strength is 12 +/-3N/15 mm.

7. The process for preparing a novel easy-to-tear dry-wet separation bag according to claim 5, wherein the process comprises the following steps: the barrier layer is made of one of aluminum foil, aluminum-plated film or aluminum oxide plated film.

8. The process for preparing a novel easy-to-tear dry-wet separation bag according to claim 5, wherein the process comprises the following steps: the PET high-strength pull handle layer is a high-strength PET film, the thickness of the PET high-strength pull handle layer is 12-60 mu, and the thickness of the easy-to-tear heat sealing layer is 40-120 mu.

9. The utility model provides an use heat-seal layer film of novel easy-uncovering dry-wet separation bag which characterized in that: the easy-open heat-seal layer of claim 5, which comprises polyethylene, polyethylene-vinyl acrylate and polyethylene-acrylic acid resin, wherein the inner bag film is produced by a five-layer co-extrusion film blowing process, the first three layers of the inner bag film are made of polyethylene resin, the fourth layer of the inner bag film is made of a mixture of polyethylene and polyethylene-acrylic acid resin, the ratio of the polyethylene to the polyethylene-acrylic acid resin is 1:1, the fifth layer of the inner bag film is made of a mixture of polyethylene and polyethylene-vinyl acrylate, and the ratio of the polyethylene to the polyethylene-vinyl acrylate is 1:4.

10. the heat-sealable film of claim 9 in which the novel peel-off dry-wet separation bag is used, wherein: when the easy-to-uncover heat-sealing layer is produced by adopting a five-layer co-extrusion film blowing process, the process comprises the following steps:

and 5, cutting into required width and rolling.