阅读说明：本技术 一种具有耐高温性能的塑料薄膜及其制备方法 (Plastic film with high temperature resistance and preparation method thereof ) 是由 钱永兴 于 2021-07-26 设计创作，主要内容包括：本发明涉及塑料薄膜技术领域,且公开了一种具有耐高温性能的塑料薄膜,包括薄膜层,所述薄膜层的一侧具有连接层,所述连接层与所述薄膜层连接,所述连接层的一侧具有抗拉伸层,所述抗拉伸层与所述连接层连接,所述抗拉伸层的一侧具有加强层,所述加强层与所述抗拉伸层连接,所述加强层的一侧具有耐热层,所述耐热层与所述加强层连接,所述耐热层的一侧具有耐撕拉层,所述耐撕拉层与所述耐热层连接,通过本发明所提供的一种具有耐高温性能的塑料薄膜,能够在高温下进行使用,且相对于普通的薄膜,本发明所提供的薄膜具备能够便于提高塑料薄膜的强度,且能够避免薄膜在受热后出现较大的拉伸变形,影响与物体的贴合能力等优点。(The invention relates to the technical field of plastic films, and discloses a plastic film with high temperature resistance, which comprises a film layer, wherein one side of the film layer is provided with a connecting layer, the connecting layer is connected with the film layer, one side of the connecting layer is provided with a stretching-resistant layer, the stretching-resistant layer is connected with the connecting layer, one side of the stretching-resistant layer is provided with a reinforcing layer, the reinforcing layer is connected with the stretching-resistant layer, one side of the reinforcing layer is provided with a heat-resistant layer, the heat-resistant layer is connected with the reinforcing layer, one side of the heat-resistant layer is provided with a tearing-resistant layer, and the tearing-resistant layer is connected with the heat-resistant layer. Influence the fitting ability with the object, and the like.)

1. A plastic film with high temperature resistance, comprising a film layer (1), characterized in that: one side of the film layer (1) is provided with a connecting layer (2), the connecting layer (2) is connected with the film layer (1), one side of the connecting layer (2) is provided with a stretch-resistant layer (3), the stretch-resistant layer (3) is connected with the connecting layer (2), one side of the stretch-resistant layer (3) is provided with a reinforcing layer (4), the reinforcing layer (4) is connected with the stretch-resistant layer (3), one side of the reinforcing layer (4) is provided with a heat-resistant layer (5), the heat-resistant layer (5) is connected with the reinforcing layer (4), one side of the heat-resistant layer (5) is provided with a tear-resistant layer (6), the tear-resistant layer (6) is connected with the heat-resistant layer (5), one side of the tear-resistant layer (6) is provided with a wrapping layer (7), the wrapping layer (7) is connected with the tear-resistant layer (6), the outer side of the film layer (1) is provided with a first forming groove (8) and a connecting groove (9), and a second forming groove (10) is formed in the outer side of the wrapping layer (7).

2. A plastic film with high temperature resistance according to claim 1, wherein: the connecting groove (9) is located thin film layer (1) is pressed to form, first forming groove (8) are formed by pressing thin film layer (1), connecting layer (2) and stretch-proofing layer (3), and second forming groove (10) is formed by pressing wrapping layer (7), tear-resistant layer (6) and heat-resistant layer (5).

3. A plastic film with high temperature resistance according to claim 2, wherein: the thickness of the film layer (1), the thickness of the connecting layer (2) and the thickness of the stretch-proof layer (3) are all 0.01-0.02 mm.

4. A plastic film with high temperature resistance according to claim 3, wherein: the thickness of the wrapping layer (7), the thickness of the tearing-resistant layer (6) and the thickness of the heat-resistant layer (5) are 0.02-0.025mm, and the thickness of the reinforcing layer (4) is 0.04-0.05 mm.

5. The method for preparing the plastic film with high temperature resistance according to claim 4, comprising the following steps:

s1, cleaning the raw materials for producing the plastic film for 10-15 minutes, then changing water for cleaning again for 3-5 minutes, and drying the raw materials after cleaning for 0.5-0.8 hour;

s2, placing the raw material into a heating furnace to heat the raw material, wherein the heating temperature is 200-250 ℃, stirring the raw material during heating at the stirring speed of 30-60 circles/min, and heating until the raw material is completely melted;

s3, after the raw materials are melted, conveying the raw materials to an extruder, respectively extruding the film layer (1), the connecting layer (2), the stretch-resistant layer (3), the reinforcing layer (4), the heat-resistant layer (5), the tear-resistant layer (6) and the wrapping layer (7) at the extrusion speed of 1-5 m/min, and after the film layer (1), the connecting layer (2), the stretch-resistant layer (3), the reinforcing layer (4), the heat-resistant layer (5), the tear-resistant layer (6) and the wrapping layer (7) are extruded, integrally extruding the film layer (1), the connecting layer (2), the stretch-resistant layer (3), the reinforcing layer (4), the heat-resistant layer (5), the tear-resistant layer (6) and the wrapping layer (7) after the installation sequence is arranged, wherein the extrusion speed is 1-4 m/min, and repeatedly extruding is carried out for 3-5 times;

s4, extruding the film layer (1), the connecting layer (2), the stretch-resistant layer (3), the reinforcing layer (4), the heat-resistant layer (5), the tear-resistant layer (6) and the wrapping layer (7) for 3-5 times, heating the plastic film to 80-120 ℃, pressing the first forming groove (8), the second forming groove (10) and the connecting groove (9), and cooling the plastic film after pressing;

s5, cooling the plastic film by adopting any one of standing cooling, air cooling or water cooling, wherein the cooling time is 2-15 minutes, and detecting the integrity of the plastic film after the plastic film is cooled;

s6, after the integrity of the plastic film is detected, performing corona treatment on the film layer (1) and the wrapping layer (7), wherein ozone can be generated in the process of performing corona treatment on the plastic film, so that the surface performance of the plastic film is improved;

s7, winding the processed plastic film at a winding speed of 4-8 m/min, and then standing the plastic film at a temperature of 15-40 ℃ for storage.

6. The method for preparing the plastic film with high temperature resistance according to claim 5, wherein the method comprises the following steps: in the step S1, when the raw material is cleaned, it is necessary to remove all impurities on the surface of the raw material.

7. The method for preparing the plastic film with high temperature resistance according to claim 5, wherein the method comprises the following steps: and the width sizes of the film layer (1), the connecting layer (2), the stretching-resistant layer (3), the reinforcing layer (4), the heat-resistant layer (5), the tearing-resistant layer (6) and the wrapping layer (7) extruded by the extruder in the S3 are the same.

8. The method for preparing the plastic film with high temperature resistance according to claim 5, wherein the method comprises the following steps: and when the incomplete plastic film is detected in the S5, cutting the incomplete plastic film between rolling.

Technical Field

The invention relates to the technical field of plastic films, in particular to a plastic film with high temperature resistance and a preparation method thereof.

Background

Films made from polyvinyl chloride, polyethylene, polypropylene, polystyrene, and other resins are used for packaging, and as a film coating. Plastic packages and plastic package products have a larger share in the market, and particularly, composite plastic flexible packages are widely applied to the fields of food, medicine, chemical industry and the like, wherein the proportion of the plastic packages is the largest, such as beverage packages, quick-frozen food packages, steamed and cooked food packages, fast food packages and the like, and the plastic packages and the plastic package products bring great convenience to the life of people.

Plastic films are most widely used in the packaging field. The plastic film can be used for food packaging, electric appliance product packaging, daily necessity packaging, clothing packaging and the like. They have a common feature that plastic films are printed in color, and food packaging is carried out by multilayer compounding or vacuum aluminizing. Therefore, the plastic film is required to have high surface free energy and high wet tension to facilitate firm adhesion of printing ink, adhesive or aluminum plating layer to the plastic film; in the processes of production, reeling and high-speed packaging of the plastic film, the surface of the film is required to have certain friction performance to prevent the film from being adhered or slipping; when the film is used for packaging electric appliances, electronic products and the like, the film is required to have certain antistatic performance and the like.

However, the existing plastic film has large stretching degree after being heated, and after packaging and sealing are carried out for a period of time, the bonding capability is insufficient, and the normal use is influenced.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a plastic film with high temperature resistance, which has the advantages of being convenient for improving the strength of the plastic film, avoiding the phenomenon that the film is greatly stretched and deformed after being heated to influence the bonding capability with an object and the like, and is used for solving the problems that the plastic film is greatly stretched after being heated in the prior art, and the bonding capability is insufficient after being packaged and sealed for a period of time to influence the normal use.

(II) technical scheme

The invention provides the following technical scheme: the plastic film with high temperature resistance comprises a film layer, wherein one side of the film layer is provided with a connecting layer, the connecting layer is connected with the film layer, one side of the connecting layer is provided with a stretching-resistant layer, the stretching-resistant layer is connected with the connecting layer, one side of the stretching-resistant layer is provided with a reinforcing layer, the reinforcing layer is connected with the stretching-resistant layer, one side of the reinforcing layer is provided with a heat-resistant layer, the heat-resistant layer is connected with the reinforcing layer, one side of the heat-resistant layer is provided with a tearing-resistant layer, the tearing-resistant layer is connected with the heat-resistant layer, one side of the tearing-resistant layer is provided with a wrapping layer, the wrapping layer is connected with the tearing-resistant layer, the outer side of the film layer is provided with a first forming groove and a connecting groove, and the outer side of the wrapping layer is provided with a second forming groove.

The plastic film with high temperature resistance can be used at high temperature, and compared with a common film, the film provided by the invention has the advantages that the strength of the plastic film can be conveniently improved, the film can be prevented from being subjected to larger stretching deformation after being heated, the bonding capability with an object is influenced, and the like, and the problems that the plastic film in the prior art is large in stretching degree after being heated, the bonding capability is insufficient after being packaged and sealed for a period of time, and the normal use is influenced are solved.

In one possible embodiment, the connecting groove is formed by pressing the film layer, the first forming groove is formed by pressing the film layer, the connecting layer and the stretch-resistant layer, and the second forming groove is formed by pressing the wrapping layer, the tear-resistant layer and the heat-resistant layer.

Can add man-hour at plastic film production through first shaping groove and second shaping groove, strengthen the connection stability of structure between the film, can avoid the film to appear the too big condition of tensile degree when receiving the heat when using, first shaping groove and second shaping groove suppression form, can make and draw each other between first shaping groove and the second shaping groove to can guarantee the stability of film.

Connection stability between the first shaping groove can be strengthened through setting up the spread groove to after the first shaping groove one side of plastic film contacts the heat source, the tensile in the first shaping groove of restriction, and then can guarantee the stability of mutual position between the first shaping groove, and can also strengthen the just structural connection between the plastic film, thereby can guarantee plastic film's intensity.

In one possible embodiment, the film layer, tie layer, and stretch resistant layer each have a thickness of 0.01 to 0.02 mm.

The film layer is made of PE, the connecting layer is made of low-density polyethylene, and the anti-stretching layer is made of polyamide.

In one possible embodiment, the wrapping layer, the tear resistant layer and the heat resistant layer each have a thickness of 0.02 to 0.025mm and the reinforcing layer has a thickness of 0.04 to 0.05 mm.

The wrapping layer is made of polyethylene terephthalate, the tearing-resistant layer is made of polypropylene through a tape casting process, the heat-resistant layer is made of polyphenylene sulfide, and the reinforcing layer is made of polystyrene.

In one possible embodiment, a method for preparing a plastic film with high temperature resistance comprises the following steps:

s1, cleaning the raw material for producing the plastic film for 10-15 minutes, then changing water for cleaning again for 3-5 minutes, and drying the raw material after cleaning for 0.5-0.8 hour.

S2, placing the raw material into a heating furnace to heat the raw material, wherein the heating temperature is 200-250 ℃, stirring the raw material during heating at the stirring speed of 30-60 circles/min, and heating until the raw material is completely melted.

S3, after the raw materials are melted, conveying the raw materials to an extruder, respectively extruding the film layer, the connecting layer, the anti-stretching layer, the reinforcing layer, the heat-resistant layer, the tearing-resistant layer and the wrapping layer at the extruding speed of 1-5 m/min, after the film layer, the connecting layer, the anti-stretching layer, the reinforcing layer, the heat-resistant layer, the tearing-resistant layer and the wrapping layer are extruded, arranging the film layer, the connecting layer, the anti-stretching layer, the reinforcing layer, the heat-resistant layer, the tearing-resistant layer and the wrapping layer in sequence, and then carrying out integral extrusion at the extruding speed of 1-4 m/min for 3-5 times.

S4, extruding the film layer, the connecting layer, the anti-stretching layer, the reinforcing layer, the heat-resistant layer, the anti-tearing layer and the wrapping layer for 3-5 times, heating the plastic film to 80-120 ℃ again, pressing the first forming groove, the second forming groove and the connecting groove, and cooling the plastic film after pressing.

S5, cooling the plastic film by adopting any one of standing cooling, air cooling or water cooling, wherein the cooling time is 2-15 minutes, and detecting the integrity of the plastic film after the plastic film is cooled;

s6, after the integrity of the plastic film is detected, the film layer and the wrapping layer are subjected to corona treatment, ozone can be generated in the process of performing corona treatment on the plastic film, and the surface performance of the plastic film is improved.

S7, winding the processed plastic film at a winding speed of 4-8 m/min, and then standing the plastic film at a temperature of 15-40 ℃ for storage.

In one possible embodiment, when the raw material is cleaned in S1, all impurities on the surface of the raw material need to be removed.

In one possible embodiment, the width dimensions of the film layer, the tie layer, the stretch resistant layer, the reinforcing layer, the heat resistant layer, the tear resistant layer and the wrapping layer extruded by the extruder in S3 are all the same.

In one possible embodiment, when the incomplete plastic film is detected in S5, the incomplete plastic film is cut between the winding.

In one possible embodiment of the method according to the invention,

compared with the prior art, the invention provides the plastic film with high temperature resistance and the preparation method thereof, and the plastic film has the following beneficial effects:

1. according to the invention, the first forming groove and the second forming groove can be used for enhancing the connection stability of the structure between the films during the production and processing of the plastic films, and can avoid the situation of overlarge stretching degree when the films are heated during use.

2. According to the invention, the connecting grooves are arranged to enhance the connecting stability between the first forming grooves, so that after one surface of the first forming groove of the plastic film is contacted with a heat source, the stretching of the first forming groove is limited, the stability of the mutual positions of the first forming grooves can be ensured, the structural connection between the plastic films can be enhanced, and the strength of the plastic films can be ensured.

3. According to the invention, the plastic film can be processed more stably by the method for processing the plastic film, so that the stability of the production and processing of the plastic film can be ensured, the strength of the plastic film after processing is improved, the waste of materials in the processing process of the plastic film can be further avoided, and the production efficiency is ensured.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

FIG. 1 is a schematic overall structure diagram of a plastic film with high temperature resistance and a preparation method thereof according to the present invention;

FIG. 2 is a bottom view of a plastic film with high temperature resistance and a method for preparing the same according to the present invention;

FIG. 3 is a half-sectional view of a plastic film with high temperature resistance and a method for preparing the same according to the present invention;

FIG. 4 is a schematic side view of a partial structure of a plastic film with high temperature resistance and a method for manufacturing the same according to the present invention;

fig. 5 is a partial sectional view of a first forming groove and a second forming groove of a plastic film with high temperature resistance and a preparation method thereof.

Wherein: the film comprises a thin film layer 1, a connecting layer 2, a stretch-proof layer 3, a reinforcing layer 4, a heat-resistant layer 5, a tear-resistant layer 6, a wrapping layer 7, a first forming groove 8, a connecting groove 9 and a second forming groove 10.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1-5, the present invention provides a plastic film with high temperature resistance, including a film layer 1, a connection layer 2 is disposed on one side of the film layer 1, the connection layer 2 is connected to the film layer 1, a stretch-resistant layer 3 is disposed on one side of the connection layer 2, the stretch-resistant layer 3 is connected to the connection layer 2, a reinforcing layer 4 is disposed on one side of the stretch-resistant layer 3, the reinforcing layer 4 is connected to the stretch-resistant layer 3, a heat-resistant layer 5 is disposed on one side of the reinforcing layer 4, the heat-resistant layer 5 is connected to the reinforcing layer 4, a tear-resistant layer 6 is disposed on one side of the heat-resistant layer 5, a wrapping layer 7 is disposed on one side of the tear-resistant layer 6, the wrapping layer 7 is connected to the tear-resistant layer 6, a first forming groove 8 and a connecting groove 9 are disposed on the outer side of the film layer 1, and a second forming groove 10 is disposed on the outer side of the wrapping layer 7.

The plastic film with high temperature resistance can be used at high temperature, and compared with a common film, the film provided by the invention has the advantages that the strength of the plastic film can be conveniently improved, the film can be prevented from being subjected to larger stretching deformation after being heated, the bonding capability with an object is influenced, and the like, and the problems that the plastic film in the prior art is large in stretching degree after being heated, the bonding capability is insufficient after being packaged and sealed for a period of time, and the normal use is influenced are solved.

In one possible embodiment, the connecting groove 9 is formed by pressing the film layer 1, the first forming groove 8 is formed by pressing the film layer 1, the connecting layer 2 and the stretch-resistant layer 3, and the second forming groove 10 is formed by pressing the wrapping layer 7, the tear-resistant layer 6 and the heat-resistant layer 5.

Can add man-hour at plastic film production through first shaping groove 8 and second shaping groove 10, strengthen the connection stability of structure between the film, can avoid the film to appear the too big condition of tensile degree when receiving the heat when using, first shaping groove 8 and second shaping groove 10 suppression form, can make and draw each other between first shaping groove 8 and the second shaping groove 10 to can guarantee the stability of film.

Can strengthen the connection stability between the first shaping groove 8 through setting up spread groove 9 to 8 one side contact the heat source in the first shaping groove of plastic film after, the tensile of the first shaping groove 8 of restriction, and then can guarantee the stability of mutual position between the first shaping groove 8, and can also strengthen the just structural connection between the plastic film, thereby can guarantee plastic film's intensity.

In one possible embodiment, the film layer 1, tie layer 2 and stretch resistant layer 3 are each 0.01 to 0.02mm thick.

The film layer 1 is made of PE, the connecting layer 2 is made of low-density polyethylene, and the anti-stretching layer 3 is made of polyamide.

In one possible embodiment, the wrapping layer 7, the tear resistant layer 6 and the heat resistant layer 5 all have a thickness of 0.02 to 0.025mm and the reinforcing layer 4 has a thickness of 0.04 to 0.05 mm.

The wrapping layer 7 is made of polyethylene terephthalate, the tearing-resistant layer 6 is made of polypropylene through a tape casting process, the heat-resistant layer 5 is made of polyphenylene sulfide, and the reinforcing layer 4 is made of polystyrene.

The first embodiment is as follows:

a preparation method of a plastic film with high temperature resistance comprises the following steps:

s1, cleaning the raw material for producing the plastic film for 15 minutes, then changing water for cleaning again for 5 minutes, and drying the raw material after cleaning for 0.8 hour.

S2, putting the raw materials into a heating furnace to heat the raw materials, wherein the heating temperature is 250 ℃, stirring the raw materials during heating at the stirring speed of 60 circles/min, and heating until the raw materials are completely melted.

S3, after the raw materials are melted, conveying the raw materials to an extruder, respectively extruding the thin film layer 1, the connecting layer 2, the anti-stretching layer 3, the reinforcing layer 4, the heat-resistant layer 5, the anti-tearing layer 6 and the wrapping layer 7 at an extrusion speed of 5 m/min, and after the thin film layer 1, the connecting layer 2, the anti-stretching layer 3, the reinforcing layer 4, the heat-resistant layer 5, the anti-tearing layer 6 and the wrapping layer 7 are extruded, integrally extruding the thin film layer 1, the connecting layer 2, the anti-stretching layer 3, the reinforcing layer 4, the heat-resistant layer 5, the anti-tearing layer 6 and the wrapping layer 7 after the installation sequence is arranged, wherein the extrusion speed is 4 m/min, and repeatedly extruding for 5 times.

S4, extruding the film layer 1, the connecting layer 2, the stretch-resistant layer 3, the reinforcing layer 4, the heat-resistant layer 5, the tear-resistant layer 6 and the wrapping layer 7 for 5 times, heating the plastic film to 120 ℃ again, pressing the first forming groove 8, the second forming groove 10 and the connecting groove 9, and cooling the plastic film after pressing.

S5, cooling the plastic film by adopting any one of standing cooling, air cooling or water cooling, wherein the cooling time is 15 minutes, and detecting the integrity of the plastic film after the plastic film is cooled;

s6, after the integrity of the plastic film is detected, the film layer 1 and the wrapping layer 7 are subjected to corona treatment, ozone can be generated in the process of performing corona treatment on the plastic film, and the surface performance of the plastic film is improved.

S7, winding the processed plastic film at the winding speed of 8 m/min, and then standing the plastic film at the temperature of 40 ℃ for storage.

Example two

A preparation method of a plastic film with high temperature resistance comprises the following steps:

s1, cleaning the raw material for producing the plastic film for 10 minutes, then changing water for cleaning again for 3 minutes, and drying the raw material after cleaning for 0.5 hour.

S2, putting the raw materials into a heating furnace to heat the raw materials, wherein the heating temperature is 200 ℃, stirring the raw materials during heating at the stirring speed of 30 circles/min, and heating until the raw materials are completely melted.

S3, after the raw materials are melted, conveying the raw materials to an extruder, respectively extruding the thin film layer 1, the connecting layer 2, the anti-stretching layer 3, the reinforcing layer 4, the heat-resistant layer 5, the anti-tearing layer 6 and the wrapping layer 7 at an extrusion speed of 1 m/min, and after the thin film layer 1, the connecting layer 2, the anti-stretching layer 3, the reinforcing layer 4, the heat-resistant layer 5, the anti-tearing layer 6 and the wrapping layer 7 are extruded, integrally extruding the thin film layer 1, the connecting layer 2, the anti-stretching layer 3, the reinforcing layer 4, the heat-resistant layer 5, the anti-tearing layer 6 and the wrapping layer 7 after the installation sequence is arranged, wherein the extrusion speed is 1 m/min, and repeatedly extruding for 3 times.

S4, extruding the film layer 1, the connecting layer 2, the stretch-resistant layer 3, the reinforcing layer 4, the heat-resistant layer 5, the tear-resistant layer 6 and the wrapping layer 7 for 3 times, heating the plastic film to 80 ℃ again, pressing the first forming groove 8, the second forming groove 10 and the connecting groove 9, and cooling the plastic film after pressing.

S5, cooling the plastic film by adopting any one of standing cooling, air cooling or water cooling, wherein the cooling time is 2 minutes, and detecting the integrity of the plastic film after the plastic film is cooled;

s6, after the integrity of the plastic film is detected, the film layer 1 and the wrapping layer 7 are subjected to corona treatment, ozone can be generated in the process of performing corona treatment on the plastic film, and the surface performance of the plastic film is improved.

S7, winding the processed plastic film at a winding speed of 4 m/min, and then standing the plastic film at a temperature of 15 ℃ for storage.

EXAMPLE III

A preparation method of a plastic film with high temperature resistance comprises the following steps:

s1, cleaning the raw material for producing the plastic film for 13 minutes, then changing water for cleaning again for 4 minutes, and drying the raw material after cleaning for 0.75 hour.

And S2, putting the raw materials into a heating furnace to heat the raw materials, wherein the heating temperature is 225 ℃, stirring the raw materials during heating at the stirring speed of 45 circles/min, and heating until the raw materials are completely melted.

S3, after the raw materials are melted, conveying the raw materials to an extruder, respectively extruding the thin film layer 1, the connecting layer 2, the anti-stretching layer 3, the reinforcing layer 4, the heat-resistant layer 5, the anti-tearing layer 6 and the wrapping layer 7 at an extrusion speed of 2.5 m/min, and after the thin film layer 1, the connecting layer 2, the anti-stretching layer 3, the reinforcing layer 4, the heat-resistant layer 5, the anti-tearing layer 6 and the wrapping layer 7 are extruded, integrally extruding the thin film layer 1, the connecting layer 2, the anti-stretching layer 3, the reinforcing layer 4, the heat-resistant layer 5, the anti-tearing layer 6 and the wrapping layer 7 after the installation sequence is arranged, wherein the extrusion speed is 3 m/min, and repeatedly extruding for 4 times.

S4, extruding the film layer 1, the connecting layer 2, the stretch-resistant layer 3, the reinforcing layer 4, the heat-resistant layer 5, the tear-resistant layer 6 and the wrapping layer 7 for 4 times, heating the plastic film to 100 ℃ again, pressing the first forming groove 8, the second forming groove 10 and the connecting groove 9, and cooling the plastic film after pressing.

S5, cooling the plastic film by adopting any one of standing cooling, air cooling or water cooling, wherein the cooling time is 6 minutes, and detecting the integrity of the plastic film after the plastic film is cooled;

s6, after the integrity of the plastic film is detected, the film layer 1 and the wrapping layer 7 are subjected to corona treatment, ozone can be generated in the process of performing corona treatment on the plastic film, and the surface performance of the plastic film is improved.

S7, winding the processed plastic film at the winding speed of 6 m/min, and then standing the plastic film at the temperature of 15 ℃ for storage.

As will be apparent to those skilled in the art, many changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.