CN113524832A - Paper-plastic composite packaging material with high air permeability and preparation method thereof - Google Patents

Paper-plastic composite packaging material with high air permeability and preparation method thereof Download PDF

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Publication number
CN113524832A
CN113524832A CN202110642728.4A CN202110642728A CN113524832A CN 113524832 A CN113524832 A CN 113524832A CN 202110642728 A CN202110642728 A CN 202110642728A CN 113524832 A CN113524832 A CN 113524832A
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film
paper
roller
air permeability
packaging material
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CN113524832B (en
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谢文汇
杨勇
刘学军
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Huangshan Novel Co Ltd
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Huangshan Novel Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0008—Electrical discharge treatment, e.g. corona, plasma treatment; wave energy or particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/04—Punching, slitting or perforating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/04—Punching, slitting or perforating
    • B32B2038/047—Perforating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Plasma & Fusion (AREA)
  • Thermal Sciences (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)

Abstract

The invention provides a paper-plastic composite packaging material with high air permeability and a preparation method thereof. The preparation method comprises a film blowing production process, a hot needle micropore process and a hot laminating compounding process, wherein a PE film material with high air permeability is obtained by optimizing the formula of the polyethylene PE film and carrying out micropore treatment on the modified PE film, then a conventional adhesive dry compounding mode and a conventional PE particle extrusion compounding mode are avoided, compounding between paper and plastic packaging materials is carried out by adopting a hot laminating compounding mode, dry laminating gluing or extrusion laminating film coating blocking of micropores on the modified polyethylene PE film is avoided, the stable and excellent PE film material with high air permeability is finally obtained, excellent thermal stability, impact resistance, heat sealing performance and excellent low-temperature bonding performance are also shown, and the special requirements of a customer market are met by packaging daily living goods into the fields of medicine, clothing industry, electric elements and the like.

Description

Paper-plastic composite packaging material with high air permeability and preparation method thereof
Technical Field
The invention relates to the field of packaging materials, in particular to a paper-plastic composite packaging material with high air permeability and a preparation method thereof.
Background
The paper-plastic composite packaging material is mainly formed by combining two materials with different properties, namely paper and a plastic base material. The paper is made of plant fibers as main raw materials, is a randomly oriented hierarchical network formed by bonding the fibers through hydrogen bonds, and has the characteristics of good stiffness, opaqueness, easiness in bonding, easiness in printing, excellent air permeability and the like. The polyethylene PE film is a plastic base material which is most widely applied to paper-plastic composite packaging, has excellent low temperature resistance, good chemical stability, excellent heat sealing performance, good processing performance, good impact strength, excellent flexibility and excellent moisture resistance, and is widely applied as a base material.
The paper-plastic composite material has the application shadow of the paper-plastic composite material from the packaging of daily necessities to the medical field, the clothing industry, the electric element field and the like, along with the progress and development of the technology, the paper-plastic composite packaging material is applied in more and more fields, and the application field and range are further expanded when special performance requirements are given.
The paper-plastic composite packing material is made up by using paper and plastic (in particular polyethylene PE film) through the processes of compounding and combining them, so that it possesses the characteristics and advantages of these two different materials. The polyethylene PE film has excellent moisture resistance and no air permeability, so that the paper-plastic packaging material formed by compounding the paper and the PE has poor air permeability. In order to meet the market demand, the preparation of a paper-plastic packaging material with high air permeability is a problem which needs to be solved urgently by packaging material research and development personnel.
Disclosure of Invention
The invention aims to overcome the defect of poor air permeability of the paper-plastic composite packaging material in the prior art and provides a paper-plastic composite packaging material with high air permeability and a preparation method thereof.
In order to solve the technical problem, the technical scheme is that the preparation method of the paper-plastic composite packaging material with high air permeability comprises the following steps:
s1, weighing raw materials with corresponding weight components according to the formula composition of the film laminating layer, the middle layer and the heat sealing layer, respectively adding the raw materials into three charging barrels of a W & H film blowing device, mixing and melting the raw materials in the charging barrels to form a tube blank, extruding and blowing the tube blank by an extruder die head to form film bubbles, and cooling and shaping the film bubbles by an air ring to obtain a polyethylene film;
s2, performing corona treatment on the surface of the corona layer of the shaped polyethylene film to obtain a modified polyethylene film;
s3, treating the modified polyethylene film by using a roller pair with needles to form countless through pinholes on the surface of the modified polyethylene film;
s4, performing heat lamination and compounding on the surface of the lamination layer in the microporous polyethylene film and paper, wherein the heat lamination temperature is 150-170 ℃, the pressure value of a lamination compression roller is 0.7-0.9MPa, and the production speed is 45-55m/min, so as to obtain the high-air-permeability paper-plastic composite packaging material.
The preparation method of the paper-plastic composite packaging material with high air permeability is further improved:
preferably, the temperatures of the three barrels corresponding to the extruder barrel in the step S1 are 150-.
Preferably, the power of the corona treatment in step S2 is 7.5 KW.
Preferably, the hole pricking roller set in step S3 includes a needle roller and a pressing roller, the needle roller and the pressing roller are used in cooperation, a roller shaft is disposed at the center of the needle roller along the axial direction of the needle roller, the outer surface of the roller shaft is uniformly provided with punching needles, the modified polyethylene film enters the gap between the needle roller and the pressing roller through a guide roller, and numerous penetrating needle holes are formed on the surface of the modified polyethylene film through the mutual engagement of the needle roller and the pressing roller at the temperature of 330 and 350 ℃.
Preferably, the roller with the needles is a wool felt roller or a nylon roller.
Preferably, the density of the perforating needles on the outer surface of the roller with the needles is 5 multiplied by 5/mm2The diameter of the tip of the perforating needle is 0.5mm, the protruding length of the needle tip of the perforating needle is 6-8mm, and the running speed of the roller with the needle is 40-60 m/min.
Preferably, the thickness ratio of the adhesive layer, the intermediate layer and the heat sealing layer is 3:4:3, wherein the thickness of the adhesive layer is 9-18 μm, the thickness of the intermediate layer is 12-24 μm, and the thickness of the heat sealing layer is 9-18 μm.
Preferably, the laminating layer is composed of modified ethylene-vinyl acetate copolymer resin, namely modified EVA resin, and the middle layer is composed of high-density polyethylene resin and low-density polyethylene resin according to a mass ratio of 75: 25; the heat sealing layer is composed of low-density polyethylene resin, metallocene polyethylene resin, smooth master batches, opening master batches and a processing aid according to the mass ratio of 75:25:1.5:1: 0.2.
Preferably, the modified EVA resin is Japanese Toyoyo L-3388, the high-density polyethylene resin is Exxonmobil HTA108, the low-density polyethylene resin is Exxonmobil LD150BW, the metallocene polyethylene resin is Dow chemical PL1881, the smooth master batch is aquaponic 10090-K, the open master batch is Beijing Asian AB-20LD, and the processing aid is aquaponic 100991-K.
In order to solve the technical problem, the invention adopts another technical scheme that the paper-plastic composite packaging material with high air permeability is prepared by any one of the preparation methods.
Compared with the prior art, the invention has the beneficial effects that:
1) according to the invention, the formula of the modified polyethylene PE film is optimized according to the selection of particles, the design of the formula and the optimization of the process, the PE film is subjected to micropore treatment through a film blowing process, and the compounding of paper-plastic packaging materials is carried out in a hot laminating compounding mode, so that the stable and excellent high-air permeability PE film material is finally obtained, and the PE film material is applied to the fields of medicine, clothing industry, electric elements and the like from daily living product packaging, and meets the specific requirements of the customer market.
2) The invention creatively adopts a hot laminating mode to compound the paper-plastic packaging materials, avoids dry laminating glue or extruding laminating film to block micropores on the modified polyethylene PE film, and improves the air permeability of the film.
3) In the raw materials, the modified EVA resin of the laminating layer is L-3388 of the east Japan, has excellent processing performance and good low-temperature bonding performance, and is suitable for the technological requirements of hot-pressing compounding;
the high-density polyethylene resin of the middle layer is Exxon Mobil HTA108, so that the stiffness of the rolled film can be improved, and the integral heat resistance of the film can be improved; the low-density polyethylene resin is Exxon Mobil LD150BW, has excellent processing performance, and can make the film blowing process of the film more stable;
the metallocene polyethylene resin of the heat sealing layer is selected from Dow chemical PL1881, the melting point is low, the heat sealing temperature of the coiled film can be reduced, the hot adhesion strength and the heat sealing strength of the coiled film can be improved, the stability of a friction coefficient can be effectively controlled by adding a proper amount of silicone, and meanwhile, the production control can be more stable by adding the processing aid color matching material 100991-K.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments, and all other embodiments obtained by a person of ordinary skill in the art without any creative effort based on the embodiments of the present invention belong to the protection scope of the present invention.
In the following examples, the modified EVA resin is available under the trade designation L-3388 available from Toyo, Japan; the high-density polyethylene resin is HTA108 produced by Exxon Mobil corporation; the low density polyethylene resin is sold as LD150BW manufactured by Exxon Mobil corporation; the metallocene polyethylene resin is PL1881 produced by the Dow chemical company; the smooth master batch is 10090-K produced by a brand color matching company; the opening master batch is AB-20LD produced by Beijing Allen company; the processing aid is 100991-K produced by an color matching company. The extrusion temperature of the extruder is set as 150-165 ℃ in the first heating zone, 175 ℃ in the second heating zone, 185 ℃ in the third heating zone, 175 ℃ in the head heating zone, 185 ℃ in the lip mold, 170-185 ℃ in the lip mold and 185 ℃ in the neck mold.
Example 1
S1, weighing raw materials of corresponding weight components according to the formula composition of the film laminating layer, the middle layer and the heat sealing layer, wherein the laminating layer consists of 100 parts by mass of modified EVA resin, and the middle layer consists of 75 parts by mass of high-density polyethylene resin and 25 parts by mass of low-density polyethylene resin; the heat-sealing layer consists of 75 parts by mass of low-density polyethylene resin, 25 parts by mass of metallocene polyethylene resin, 1.5 parts by mass of smooth master batch, 1 part by mass of open master batch and 0.2 part by mass of processing aid, and the heat-sealing layer is respectively added into three charging barrels of W & H film blowing equipment;
mixing and melting the raw materials in the three charging barrels to form a tube blank, stretching the tube blank, punching the tube blank from the center of a die head of an extruder, compressing air to blow the tube blank into film bubbles, cooling and shaping the film bubbles by an air ring to obtain a polyethylene film, carrying out corona treatment on the shaped film on the corona layer of the film, and setting the corona treatment power to be 7.5KW to obtain the modified polyethylene film;
s2, carrying out roller treatment on the modified polyethylene film by adopting a roller pair with needles to form countless through pinholes on the surface of the modified polyethylene film;
s3, carrying out hot lamination and compounding on the polyethylene film subjected to the micropore treatment and the paper, wherein the hot lamination temperature is 160 ℃, the pressure value of a laminating press roller is 0.8MPa, and the production speed is 50m/min, so that the paper-plastic composite packaging material with high air permeability is prepared.
Example 2
S1, weighing raw materials of corresponding weight components according to the formula composition of the film laminating layer, the middle layer and the heat sealing layer, wherein the laminating layer consists of 95 parts by mass of modified EVA resin, and the middle layer consists of 75 parts by mass of high-density polyethylene resin and 25 parts by mass of low-density polyethylene resin; the heat-sealing layer consists of 80 parts by mass of low-density polyethylene resin, 25 parts by mass of metallocene polyethylene resin, 1.5 parts by mass of smooth master batch, 1 part by mass of open master batch and 0.2 part by mass of processing aid, and the heat-sealing layer is respectively added into three charging barrels of W & H film blowing equipment;
mixing and melting the raw materials in the three charging barrels to form a tube blank, stretching the tube blank, punching the tube blank from the center of a die head of an extruder, compressing air to blow the tube blank into film bubbles, cooling and shaping the film bubbles by an air ring to obtain a polyethylene film, carrying out corona treatment on the shaped film on the corona layer of the film, and setting the corona treatment power to be 7.5KW to obtain the modified polyethylene film;
s2, carrying out roller treatment on the modified polyethylene film by adopting a roller pair with needles to form countless through pinholes on the surface of the modified polyethylene film;
s3, carrying out hot lamination and compounding on the polyethylene film subjected to the micropore treatment and the paper, wherein the hot lamination temperature is 160 ℃, the pressure value of a laminating press roller is 0.8MPa, and the production speed is 50m/min, so that the paper-plastic composite packaging material with high air permeability is prepared.
Example 3
S1, weighing raw materials of corresponding weight components according to the formula composition of the film laminating layer, the middle layer and the heat sealing layer, wherein the laminating layer consists of 90 parts by mass of modified EVA resin, and the middle layer consists of 75 parts by mass of high-density polyethylene resin and 25 parts by mass of low-density polyethylene resin; the heat sealing layer consists of 85 parts by mass of low-density polyethylene resin, 25 parts by mass of metallocene polyethylene resin, 1.5 parts by mass of smooth master batch, 1 part by mass of open master batch and 0.2 part by mass of processing aid, and the low-density polyethylene resin, the smooth master batch, the open master batch and the processing aid are respectively added into three material cylinders of W & H film blowing equipment;
mixing and melting the raw materials in the three charging barrels to form a tube blank, stretching the tube blank, punching the tube blank from the center of a die head of an extruder, compressing air to blow the tube blank into film bubbles, cooling and shaping the film bubbles by an air ring to obtain a polyethylene film, carrying out corona treatment on the shaped film on the corona layer of the film, and setting the corona treatment power to be 7.5KW to obtain the modified polyethylene film;
s2, carrying out roller treatment on the modified polyethylene film by adopting a roller pair with needles to form countless through pinholes on the surface of the modified polyethylene film;
s3, carrying out hot lamination and compounding on the polyethylene film subjected to the micropore treatment and the paper, wherein the hot lamination temperature is 160 ℃, the pressure value of a laminating press roller is 0.8MPa, and the production speed is 50m/min, so that the paper-plastic composite packaging material with high air permeability is prepared.
Comparative example 1
S1, weighing raw materials of corresponding weight components according to the formula composition of the film laminating layer, the middle layer and the heat sealing layer, wherein the laminating layer consists of 100 parts by mass of modified EVA resin, and the middle layer consists of 75 parts by mass of high-density polyethylene resin and 25 parts by mass of low-density polyethylene resin; the heat-sealing layer consists of 75 parts by mass of low-density polyethylene resin, 25 parts by mass of metallocene polyethylene resin, 1.5 parts by mass of smooth master batch, 1 part by mass of open master batch and 0.2 part by mass of processing aid, and the heat-sealing layer is respectively added into three charging barrels of W & H film blowing equipment;
mixing and melting the raw materials in the three charging barrels to form a tube blank, stretching the tube blank, punching the tube blank from the center of a die head of an extruder, compressing air to blow the tube blank into film bubbles, cooling and shaping the film bubbles by an air ring to obtain a polyethylene film, carrying out corona treatment on the shaped film on the corona layer of the film, and setting the corona treatment power to be 7.5KW to obtain the modified polyethylene film;
s2, carrying out roller treatment on the modified polyethylene film by adopting a roller pair with needles to form countless through pinholes on the surface of the modified polyethylene film;
s3, compounding the polyethylene film subjected to micropore processing with paper, and adopting a compounding mode of extrusion compounding, wherein the grade of the extruded composite polyethylene granules is 722 of Dow chemical, and the extrusion thickness is 15 mu m, so that the paper-plastic composite packaging material is prepared and used as a comparative example.
The paper-plastic composite packing materials prepared in examples 1 to 3 and comparative example were subjected to performance tests, and the results are shown in table 1 below:
TABLE 1 Performance test of paper-plastic composite packaging materials obtained in examples 1-3 and comparative example 1
Figure BDA0003108654870000061
Figure BDA0003108654870000071
As can be seen from the test results of table 1: the water vapor transmission rate data of the packaging material prepared by the preparation method of the high-air permeability paper-plastic composite packaging material is far higher than that of the paper-plastic composite packaging material produced by adopting an extrusion compounding process in the existing comparative example, and the packaging material has excellent high air permeability.
The tensile strength and the elongation at break of the paper-plastic composite packaging material with high air permeability prepared by the technical scheme of the application are slightly lower than those of the comparative example 1, because the extrusion compounding process is adopted in the comparative example 1, the thickness of an extruded film is increased by 15 micrometers, and the thickness of the corresponding composite packaging material is also increased by 15 micrometers. The tensile force and elongation at break data is also increased a little. The peel force, the friction coefficient and the heat seal strength are basically similar to those of the comparative example 1, so that the paper-plastic composite packaging material prepared by the method has the performance characteristics of the traditional paper-plastic packaging material, also has excellent high air permeability, and can meet the specific requirements of the customer market in the fields of daily life product packaging, medicine, clothing industry, electrical elements and the like.
It should be understood by those skilled in the art that the foregoing is only illustrative of several embodiments of the invention, and not of all embodiments. It should be noted that many variations and modifications are possible to those skilled in the art, and all variations and modifications that do not depart from the gist of the invention are intended to be within the scope of the invention as defined in the appended claims.

Claims (10)

1. A preparation method of a paper-plastic composite packaging material with high air permeability is characterized by comprising the following steps:
s1, weighing raw materials with corresponding weight components according to the formula composition of the film laminating layer, the middle layer and the heat sealing layer, respectively adding the raw materials into three charging barrels of a W & H film blowing device, mixing and melting the raw materials in the charging barrels to form a tube blank, extruding and blowing the tube blank by an extruder die head to form film bubbles, and cooling and shaping the film bubbles by an air ring to obtain a polyethylene film;
s2, performing corona treatment on the surface of the corona layer of the shaped polyethylene film to obtain a modified polyethylene film;
s3, treating the modified polyethylene film by adopting a pricking roller group to form countless penetrating pinholes on the surface of the modified polyethylene film;
s4, performing heat lamination and compounding on the surface of the lamination layer in the microporous polyethylene film and paper, wherein the heat lamination temperature is 150-170 ℃, the pressure value of a lamination compression roller is 0.7-0.9MPa, and the production speed is 45-55m/min, so as to obtain the high-air-permeability paper-plastic composite packaging material.
2. The method for preparing a paper-plastic composite packaging material with high air permeability as claimed in claim 1, wherein the temperatures of the three barrels corresponding to the extruder barrel in the step S1 are 150-.
3. The method for preparing a paper-plastic composite packaging material with high air permeability according to claim 1, wherein the power of the corona treatment in step S2 is 7.5 KW.
4. The method for preparing a paper-plastic composite packaging material with high air permeability according to claim 1, wherein the hole-piercing roller set in step S3 comprises a needle-equipped roller and a press roller which are used in cooperation, a roller shaft is arranged at the center of the needle-equipped roller along the axial direction of the needle-equipped roller, perforating needles are uniformly arranged on the outer surface of the roller shaft, the modified polyethylene film enters a gap between the needle-equipped roller and the press roller from the guide roller, and countless penetrating needle holes are formed on the surface of the modified polyethylene film by the mutual engagement of the needle-equipped roller and the press roller at the temperature of 330 and 350 ℃.
5. The method for preparing the paper-plastic composite packaging material with high air permeability as claimed in claim 4, wherein the roller with the needle is a felt roller or a nylon roller.
6. The method for preparing a paper-plastic composite packaging material with high air permeability according to claim 4, wherein the density of the perforated needles on the outer surface of the roller with the needles in the step S3 is 5 x 5/mm2The diameter of the tip of the perforating needle is 0.5mm, the protruding length of the needle tip of the perforating needle is 6-8mm, and the running speed of the roller with the needle is 40-60 m/min.
7. The preparation method of the paper-plastic composite packaging material with high air permeability as claimed in claim 1, wherein the thickness ratio of the laminating layer, the middle layer and the heat-sealing layer is 3:4:3, wherein the laminating layer has a thickness of 9-18 μm, the middle layer has a thickness of 12-24 μm, and the heat-sealing layer has a thickness of 9-18 μm.
8. The method for preparing a paper-plastic composite packaging material with high air permeability according to claim 1, wherein the adhesive layer is composed of modified ethylene-vinyl acetate copolymer resin (modified EVA resin), and the middle layer is composed of high-density polyethylene resin and low-density polyethylene resin according to a mass ratio of 75: 25; the heat sealing layer is composed of low-density polyethylene resin, metallocene polyethylene resin, smooth master batches, opening master batches and a processing aid according to the mass ratio of 75:25:1.5:1: 0.2.
9. The preparation method of the paper-plastic composite packaging material with high air permeability according to claim 8, wherein the modified EVA resin is Japanese Toyo L-3388, the high-density polyethylene resin is Exxon Mobil HTA108, the low-density polyethylene resin is Exxon Mobil LD150BW, the metallocene polyethylene resin is Dow chemical PL1881, the smooth master batch is Anzilian 10090-K, the open master batch is Beijing Asian AB-20LD, and the processing aid is Anzilian 100991-K.
10. A paper-plastic composite packaging material with high air permeability prepared by the preparation method of any one of claims 1 to 9.
CN202110642728.4A 2021-06-09 2021-06-09 Paper-plastic composite packaging material with high air permeability and preparation method thereof Active CN113524832B (en)

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CN101260633A (en) * 2008-01-04 2008-09-10 东莞市广益食品添加剂实业有限公司 Alcohol antistaling agent wrapper paper and method for making same
CN102152581A (en) * 2009-12-31 2011-08-17 广东德冠薄膜新材料股份有限公司 Paper and plastic combined polyolefin film
CN102848617A (en) * 2012-10-11 2013-01-02 王周 Composite ventilating film with multilayered structure as well as production method and application thereof
CN107815007A (en) * 2017-11-17 2018-03-20 芜湖蓝天工程塑胶有限公司 Breathable polyethylene Film laminated paper and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101260633A (en) * 2008-01-04 2008-09-10 东莞市广益食品添加剂实业有限公司 Alcohol antistaling agent wrapper paper and method for making same
CN102152581A (en) * 2009-12-31 2011-08-17 广东德冠薄膜新材料股份有限公司 Paper and plastic combined polyolefin film
CN102848617A (en) * 2012-10-11 2013-01-02 王周 Composite ventilating film with multilayered structure as well as production method and application thereof
CN107815007A (en) * 2017-11-17 2018-03-20 芜湖蓝天工程塑胶有限公司 Breathable polyethylene Film laminated paper and preparation method thereof

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