CN114801388A - Packaging film capable of preventing bag making from fluffing and manufacturing method thereof - Google Patents

Packaging film capable of preventing bag making from fluffing and manufacturing method thereof Download PDF

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Publication number
CN114801388A
CN114801388A CN202210548163.8A CN202210548163A CN114801388A CN 114801388 A CN114801388 A CN 114801388A CN 202210548163 A CN202210548163 A CN 202210548163A CN 114801388 A CN114801388 A CN 114801388A
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Prior art keywords
film
layer
base film
packaging
ldpe
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Chinese (zh)
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苏壮
王剑
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Zhuhai Deshen Environmental Protection Packaging Co ltd
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Zhuhai Deshen Environmental Protection Packaging 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
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • 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
    • 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
    • B32B38/0004—Cutting, tearing or severing, e.g. bursting; Cutter details
    • 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
    • B32B38/14—Printing or colouring
    • B32B38/145—Printing
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/242—All polymers belonging to those covered by group B32B27/32
    • 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
    • B32B2439/00—Containers; Receptacles
    • B32B2439/02—Open containers
    • B32B2439/06—Bags, sacks, sachets

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Thermal Sciences (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Wrappers (AREA)

Abstract

The invention discloses a bag-making fluffless packaging film and a manufacturing method thereof, and the bag-making fluffless packaging film comprises a three-layer co-extrusion film blowing machine which is blown to form a film to form a three-layer co-extrusion layer, wherein the three-layer co-extrusion layer consists of an inner-layer base film, a middle-layer base film and an outer-layer base film, the inner-layer base film is a heat-sealing layer, the outer-layer base film is a corona treatment layer or a composite layer, and the inner-layer base film comprises the following components in percentage by mass: LLDPE: 40% -50%, LDPE: 50% -53%, MLLDPE: 5% -8%, opening slipping agent: 0.5% -2.5%, PPA: 0.2% -0.4%; the middle-layer basement membrane comprises the following components in percentage by mass: LLDPE: 49% -51%, LDPE: 50% -52%, PPA: 0.2% -0.4%; the outer-layer base film comprises the following components in percentage by mass: LLDPE: 49% -51%, LDPE: 50% -52%, PPA: 0.2 to 0.4 percent. According to the invention, the proportion of LDPE is increased, the proper proportion is adjusted, and the elongation at break of the PE film is reduced, so that the cut bag is not fluffy, and the quality of a finished product cannot be influenced by other physical properties; finished product bag making feedback, through making bags in batches many times, the problem of deckle edge does not basically appear in every bag of cutting, has improved the drawback that produces deckle edge easily among the prior art.

Description

Packaging film capable of preventing bag making from fluffing and manufacturing method thereof
Technical Field
The invention relates to the technical field of packaging films, in particular to a packaging film capable of preventing bags from fluffing and a manufacturing method thereof.
Background
The eight-edge sealed plastic packaging bag is a bag type of a gravure printing composite flexible package, and is mainly applied to packaging of products with higher added values, such as food, coffee, pet food, tea and cosmetics.
In the prior art, a manufacturer frequently generates fluffing and other problems when making an eight-edge bag sealing bag because a common bag only has two layers of thickness, the bottom of the eight-edge bag sealing bag has four layers of thickness, and a bag making machine cuts out fluffing easily, so that foreign matters are easily mixed by the fluffing scraps and fall into food to influence the food safety. The edge fragments are mostly PE according to analysis, so that the market needs to develop a packaging film for making bags without fluffing.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a bag-making fluffless packaging film and a manufacturing method thereof.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a packaging film of system bag non-fluff, includes that three-layer is crowded inflation film manufacturing machine blowing film forming altogether forms the three-layer and is crowded layer altogether, the three-layer is crowded layer altogether comprises inlayer base film, middle level base film and outer base film, and the inlayer base film is the heat-seal layer, and outer base film is corona treatment layer or composite bed, and three-layer base film each component is as follows according to the mass percent:
the inner base film comprises the following components in percentage by mass:
LLDPE：40％-50％，
LDPE：50％-53％，
MLLDPE：5％-8％，
an opening slipping agent: 0.5 to 2.5 percent of,
PPA：0.2％-0.4％；
the middle-layer basement membrane comprises the following components in percentage by mass:
LLDPE：49％-51％，
LDPE：50％-52％，
PPA：0.2％-0.4％；
the outer-layer base film comprises the following components in percentage by mass:
LLDPE：49％-51％，
LDPE：50％-52％，
PPA：0.2％-0.4％；
wherein, in the inner base film, the LLDPE model is 1002BU, the LDPE model is 2426K, the MLLDPE model is 1018MF, the shedding slipping agent model is SF-002, and the PPA model is-A1058;
in the middle-layer basal membrane, the model of LLDPE is 1002BU, the model of LDPE is 2426K, and the model of PPA is-A1058;
in the outer-layer base film, the model of LLDPE is 1002AY, the model of LDPE is 2426K, and the model of PPA is-A1058.
Wherein, LLDPE: linear low density polyethylene, LDPE: low density polyethylene, MLLDPE: linear low density polyethylene produced with metallocene as catalyst, PPA: high temperature resistant nylon.
Further, when the thickness of the inner base film is less than 45um, the inner base film comprises the following components in percentage by mass:
LLDPE：40％-43％，
LDPE：50％-53％，
MLLDPE：5％-8％，
an opening slipping agent: 2 to 2.5 percent of the total weight of the mixture,
PPA：0.2％-0.4％。
further, when the thickness of the inner base film is 46-60um, the inner base film comprises the following components in percentage by mass:
LLDPE：43％-45％，
LDPE：48％-50％，
MLLDPE：5％-8％，
an opening slipping agent: 1.5 to 2 percent of the total weight of the mixture,
PPA：0.2％-0.4％。
further, when the thickness of the inner base film is 61-85um, the inner base film comprises the following components in percentage by mass:
LLDPE：45％-47％，
LDPE：45％-48％，
MLLDPE：5％-8％，
an opening slipping agent: 1 to 1.5 percent of the total weight of the mixture,
PPA：0.2％-0.4％。
further, when the thickness of the inner base film is more than 85um, the inner base film comprises the following components in percentage by mass:
LLDPE：47％-50％，
LDPE：42％-45％，
MLLDPE：5％-8％，
an opening slipping agent: 0.5 to 1 percent of the total weight of the mixture,
PPA：0.2％-0.4％。
the Linear Low Density Polyethylene (LLDPE) is non-toxic, tasteless and odorless milky white particles with the density of 0.918-0.935 g/cm 3 The high-strength high-toughness high-strength high-tear-resistance high-strength high-toughness high-strength high-impact-resistance high-tear-resistance high-strength high-toughness high-strength high-toughness high-strength high-toughness high-strength high-toughness high; low density polyethylene, also known as high pressure polyethylene, often abbreviated as LDPE, is in the form of milky-white, odorless, nontoxic, matte-surfaced waxy particles having a density of 0.91g/cm 3 -0.93g/cm 3 Has good flexibility and extensibility, and particularly has good brittleness for cutting bags.
A method for preparing a packaging film for making bags without fluffing comprises the following steps:
s1 PE blown film
Preparing a thin film by adopting a three-layer co-extrusion film blowing method, respectively preparing an inner-layer base film, a middle-layer base film and an outer-layer base film by using a three-layer co-extrusion film blowing machine, and finally extruding and blowing the inner-layer base film, the middle-layer base film and the outer-layer base film from a screw through a die head of the three-layer co-extrusion film blowing machine to form a finished film;
s2 winding
The PE film enters a winding machine through guide rollers;
s3 slitting
Cutting the bubble entering the winding machine into two pieces, and rubbing and winding the two pieces of bubble on rubber rollers at two sides respectively;
s4 packaging
And (4) rolling and packaging the rolled PE film, and warehousing.
Further, in S1, the parameters of the three-layer co-extrusion film blowing machine are set as follows: the temperature of the inner layer screw material barrel is 210-215 ℃, the temperature of the middle layer screw material barrel is 195-200 ℃, the temperature of the outer layer screw material barrel is 210-215 ℃, the temperature of the die head runner is 210 ℃, the refrigeration temperature is 17-19 ℃, and the blow-up ratio is 1.3: 1.
Further, in S1, the parameters of the three-layer co-extrusion film blowing machine are set as follows: the temperature of the inner screw barrel is 210 ℃, the temperature of the middle screw barrel is 200 ℃, and the temperature of the outer screw barrel is 210 ℃.
Further, the preparation method of the packaging film for making the bag without fluffing comprises the following steps:
s1 PE blown film
Preparing a thin film by adopting a three-layer co-extrusion film blowing method, respectively preparing an inner-layer base film, a middle-layer base film and an outer-layer base film by using a three-layer co-extrusion film blowing machine, and finally extruding and blowing the inner-layer base film, the middle-layer base film and the outer-layer base film from a screw through a die head of the three-layer co-extrusion film blowing machine to form a finished film;
s2 corona discharge
Corona is applied to the surface of the outer base film of the PE film, the voltage is 6.0V, and the machine speed is 50 m/min;
s3 winding
The PE film enters a winding machine through guide rollers;
s4 slitting
Cutting the bubble entering the winding machine into two pieces, and rubbing and winding the two pieces of bubble on rubber rollers at two sides respectively;
s5 packaging
And (4) rolling and packaging the rolled PE film, and warehousing.
Further, the preparation method of the packaging film for making the bag without fluffing comprises the following steps:
s1 PE blown film
Preparing a thin film by adopting a three-layer co-extrusion film blowing method, respectively preparing an inner-layer base film, a middle-layer base film and an outer-layer base film by using a three-layer co-extrusion film blowing machine, and finally extruding and blowing the inner-layer base film, the middle-layer base film and the outer-layer base film from a screw through a die head of the three-layer co-extrusion film blowing machine to form a finished film;
s2 BOPA printing
Printing ink on the food-grade BOPA printing film;
s3 compounding and curing
Compounding and curing the PE film and the printed BOPA film;
s4 corona discharge
Corona treatment is carried out on the single surface of the BOPA surface by using a corona treatment machine, the voltage is 6.0V, and the machine speed is 50 m/min;
s5 winding
The PE film enters a winding machine through guide rollers;
s6 slitting
Cutting the bubble entering the winding machine into two pieces, and rubbing and winding the two pieces of bubble on rubber rollers at two sides respectively;
s7 packaging
And (4) rolling and packaging the rolled PE film, and warehousing.
Compared with the prior art, the invention has the beneficial effects that: the packaging film for making bags without fluffing and the preparation method have the following advantages:
by increasing the proportion of LDPE, adjusting the proper proportion and reducing the elongation at break of the PE film, the cut bag is not fluffy, and the quality of finished products cannot be influenced by other physical properties.
Finished product bag making feedback is realized, bag making is carried out in batches for multiple times, the problem of burrs does not occur basically when the bags are cut every time, and the defect that burrs are easy to generate in the prior art is overcome.
Drawings
FIG. 1 is a process flow diagram of a method of making a bagging lint-free packaging film according to the present invention;
FIG. 2 is a process flow diagram of one embodiment of a method of making a bag-making lint-free packaging film according to the present invention;
FIG. 3 is a process flow diagram of another embodiment of the method of making a sack-making lint-free packaging film of the present invention.
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. 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.
Referring to fig. 1, the present embodiment provides a technical solution:
example 1
A packaging film without fluffing during bag making comprises three co-extrusion film blowing machines for blowing to form three co-extrusion layers, wherein each co-extrusion layer consists of an inner base film, a middle base film and an outer base film, the inner base film is a heat sealing layer, and the outer base film is a corona treatment layer or a composite layer;
the thickness of the inner base film is 42um, and the inner base film comprises the following components in percentage by mass:
LLDPE：40％，
LDPE：51％，
MLLDPE：6.1％，
an opening slipping agent: 2.5 percent of the total weight of the mixture,
PPA：0.4％；
the middle-layer basement membrane comprises the following components in percentage by mass:
LLDPE：49％，
LDPE：50.8％，
PPA：0.2％；
the outer-layer base film comprises the following components in percentage by mass:
LLDPE：49.6％，
LDPE：50％，
PPA：0.4％；
wherein, in the inner base film, the LLDPE model is 1002BU, the LDPE model is 2426K, the MLLDPE model is 1018MF, the shedding slipping agent model is SF-002, and the PPA model is-A1058;
in the middle-layer basal membrane, the model of LLDPE is 1002BU, the model of LDPE is 2426K, and the model of PPA is-A1058;
in the outer-layer base film, the model of LLDPE is 1002AY, the model of LDPE is 2426K, and the model of PPA is-A1058.
Wherein, LLDPE: linear low density polyethylene, LDPE: low density polyethylene, MLLDPE: linear low density polyethylene produced with metallocene as catalyst, PPA: high temperature resistant nylon.
The method for preparing the packaging film for making the bag without fluffing in the embodiment 1 comprises the following steps:
s1 PE blown film
Adopt the three-layer to crowd blown film method preparation film altogether, use the three-layer to crowd the inflation film manufacturing machine and prepare inlayer base film, middle level base film and outer base film respectively altogether, at last interior, well, outer three-layer base film is from the screw rod through the three-layer to crowd the inflation film manufacturing machine die head extrusion inflation and is formed the finished product membrane, the three-layer is crowded inflation film manufacturing machine parameter setting altogether: setting parameters of a layer co-extrusion film blowing machine: the temperature of the inner layer screw material barrel is 210 ℃, the temperature of the middle layer screw material barrel is 200 ℃, the temperature of the outer layer screw material barrel is 210 ℃, the temperature of a die head runner is 210 ℃, the refrigeration temperature is 17 ℃, and the blow-up ratio is 1.3: 1;
s2 winding
The PE film enters a winding machine through guide rollers;
s3 slitting
Cutting the bubble entering the winding machine into two pieces, and rubbing and winding the two pieces of bubble on rubber rollers at two sides respectively;
s4 packaging
And (4) rolling and packaging the rolled PE film, and warehousing.
Example 2
A packaging film without fluffing during bag making comprises a three-layer co-extrusion film blowing machine which is blown to form a film to form a three-layer co-extrusion layer, wherein the three-layer co-extrusion layer consists of an inner-layer base film, a middle-layer base film and an outer-layer base film, the inner-layer base film is a heat sealing layer, and the outer-layer base film is a corona treatment layer or a composite layer;
the thickness of the inner base film is 50um, and the inner base film comprises the following components in percentage by mass:
LLDPE：43％，
LDPE：50％，
MLLDPE：5％，
an opening slipping agent: 1.7 percent of the total weight of the steel,
PPA：0.3％；
the middle-layer basement membrane comprises the following components in percentage by mass:
LLDPE：49.5％，
LDPE：50.2％，
PPA：0.3％；
the outer-layer base film comprises the following components in percentage by mass:
LLDPE：49.8％，
LDPE：50％，
PPA：0.2％；
wherein, in the inner base film, the LLDPE model is 1002BU, the LDPE model is 2426K, the MLLDPE model is 1018MF, the shedding slipping agent model is SF-002, and the PPA model is-A1058;
in the middle-layer basal membrane, the model of LLDPE is 1002BU, the model of LDPE is 2426K, and the model of PPA is-A1058;
in the outer-layer base film, the model of LLDPE is 1002AY, the model of LDPE is 2426K, and the model of PPA is-A1058.
The method for preparing the packaging film for making the bag without fluffing in the embodiment 2 comprises the following steps:
s1 PE blown film
Adopt the three-layer to crowd blown film method preparation film altogether, use the three-layer to crowd the inflation film manufacturing machine and prepare inlayer base film, middle level base film and outer base film respectively altogether, at last interior, well, outer three-layer base film is from the screw rod through the three-layer to crowd the inflation film manufacturing machine die head extrusion inflation and is formed the finished product membrane, the three-layer is crowded inflation film manufacturing machine parameter setting altogether: setting parameters of a layer co-extrusion film blowing machine: the temperature of the inner layer screw material barrel is 210 ℃, the temperature of the middle layer screw material barrel is 200 ℃, the temperature of the outer layer screw material barrel is 210 ℃, the temperature of a die head runner is 210 ℃, the refrigeration temperature is 17 ℃, and the blow-up ratio is 1.3: 1;
s2 winding
The PE film enters a winding machine through guide rollers;
s3 slitting
Cutting the bubble entering the winding machine into two pieces, and rubbing and winding the two pieces of bubble on rubber rollers at two sides respectively;
s4 packaging
And (4) rolling and packaging the rolled PE film, and warehousing.
Example 3
A packaging film without fluffing during bag making comprises a three-layer co-extrusion film blowing machine which is blown to form a film to form a three-layer co-extrusion layer, wherein the three-layer co-extrusion layer consists of an inner-layer base film, a middle-layer base film and an outer-layer base film, the inner-layer base film is a heat sealing layer, and the outer-layer base film is a corona treatment layer or a composite layer;
the thickness of the inner base film is 75um, and the inner base film comprises the following components in percentage by mass:
LLDPE：45％，
LDPE：47.5％，
MLLDPE：6％，
an opening slipping agent: 1.2 percent of the total weight of the mixture,
PPA：0.3％；
the middle-layer basement membrane comprises the following components in percentage by mass:
LLDPE：49.5％，
LDPE：50.3％，
PPA：0.2％；
the outer-layer base film comprises the following components in percentage by mass:
LLDPE：49.2％，
LDPE：50.4％，
PPA：0.4％；
wherein, in the inner base film, the LLDPE model is 1002BU, the LDPE model is 2426K, the MLLDPE model is 1018MF, the shedding slipping agent model is SF-002, and the PPA model is-A1058;
in the middle-layer basal membrane, the model of LLDPE is 1002BU, the model of LDPE is 2426K, and the model of PPA is-A1058;
in the outer-layer base film, the model of LLDPE is 1002AY, the model of LDPE is 2426K, and the model of PPA is-A1058.
The method for preparing the packaging film for making the bag without fluffing in the embodiment 3 comprises the following steps:
s1 PE blown film
Adopt the three-layer to crowd blown film method preparation film altogether, use the three-layer to crowd the inflation film manufacturing machine and prepare inlayer base film, middle level base film and outer base film respectively altogether, at last interior, well, outer three-layer base film is from the screw rod through the three-layer to crowd the inflation film manufacturing machine die head extrusion inflation and is formed the finished product membrane, the three-layer is crowded inflation film manufacturing machine parameter setting altogether: setting parameters of a layer co-extrusion film blowing machine: the temperature of the inner layer screw material barrel is 210 ℃, the temperature of the middle layer screw material barrel is 200 ℃, the temperature of the outer layer screw material barrel is 210 ℃, the temperature of a die head runner is 210 ℃, the refrigeration temperature is 17 ℃, and the blow-up ratio is 1.3: 1;
s2 winding
The PE film enters a winding machine through guide rollers;
s3 slitting
Cutting the bubble entering the winding machine into two pieces, and rubbing and winding the two pieces of bubble on rubber rollers at two sides respectively;
s4 packaging
And (4) rolling and packaging the rolled PE film, and warehousing.
Experimental example 1
The bag-making and fluffless packaging film prepared in example 2 was tested in terms of tensile strength, elongation at break, pendulum impact resistance and seal initiation temperature, according to the method specified in GB/T10004-2008 plastic composite film for packaging, bag dry lamination and extrusion lamination, and the test data are shown in Table 1.
Figure BDA0003650355340000111
TABLE 1
From the data, the elongation at break of the PE film prepared by the invention is obviously reduced by one time compared with that of the common PE, so that the bag cutting burr can be well reduced.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (9)

1. A packaging film for bag making without fluffing is characterized in that: including three-layer coextrusion inflation film manufacturing machine blowing film formation three-layer coextrusion layer, three-layer coextrusion layer comprises inlayer base film, middle level base film and outer base film, and the inlayer base film is the heat-seal layer, and outer base film is corona treatment layer or composite bed, and three-layer base film each component is as follows according to mass percent:
the inner base film comprises the following components in percentage by mass:
LLDPE：40％-50％，
LDPE：50％-53％，
MLLDPE：5％-8％，
an opening slipping agent: 0.5 to 2.5 percent of,
PPA：0.2％-0.4％；
the middle-layer basement membrane comprises the following components in percentage by mass:
LLDPE：49％-51％，
LDPE：50％-52％，
PPA：0.2％-0.4％；
the outer basement membrane comprises the following components in percentage by mass:
LLDPE：49％-51％，
LDPE：50％-52％，
PPA：0.2％-0.4％；
wherein, in the inner base film, the LLDPE model is 1002BU, the LDPE model is 2426K, the MLLDPE model is 1018MF, the shedding slipping agent model is SF-002, and the PPA model is-A1058;
in the middle-layer basal membrane, the model of LLDPE is 1002BU, the model of LDPE is 2426K, and the model of PPA is-A1058;
in the outer base film, the model of LLDPE is 1002AY, the model of LDPE is 2426K, and the model of PPA is-A1058.
2. The bag-making fluffless packaging film according to claim 1, wherein when the thickness of the inner base film is less than 45um, the components of the inner base film are as follows by mass percent:
LLDPE：40％-43％，
LDPE：50％-53％，
MLLDPE：5％-8％，
an opening slipping agent: 2 to 2.5 percent of the total weight of the mixture,
PPA：0.2％-0.4％。
3. the bag-making fluffless packaging film according to the claim 1, wherein when the thickness of the inner base film is 46-60um, the components of the inner base film are as follows by mass percent:
LLDPE：43％-45％，
LDPE：48％-50％，
MLLDPE：5％-8％，
an opening slipping agent: 1.5 to 2 percent of the total weight of the mixture,
PPA：0.2％-0.4％。
4. the bag-making fluffless packaging film according to the claim 1, wherein when the thickness of the inner base film is 61-85um, the components of the inner base film are as follows by mass percent:
LLDPE：45％-47％，
LDPE：45％-48％，
MLLDPE：5％-8％，
an opening slipping agent: 1 to 1.5 percent of the total weight of the mixture,
PPA：0.2％-0.4％。
5. the bagging lint-free packaging film as claimed in claim 1, wherein when the thickness of the inner base film is greater than 85 μm, the inner base film comprises the following components in percentage by mass:
LLDPE：47％-50％，
LDPE：42％-45％，
MLLDPE：5％-8％，
an opening slipping agent: 0.5 to 1 percent of the total weight of the mixture,
PPA：0.2％-0.4％。
6. the method for preparing a bagging fluffless packaging film according to any one of claims 1-5, comprising the steps of:
s1 PE blown film
Preparing a thin film by adopting a three-layer co-extrusion film blowing method, respectively preparing an inner-layer base film, a middle-layer base film and an outer-layer base film by using a three-layer co-extrusion film blowing machine, and finally extruding and blowing the inner-layer base film, the middle-layer base film and the outer-layer base film from a screw through a die head of the three-layer co-extrusion film blowing machine to form a finished film;
s2 winding
The PE film enters a winding machine through guide rollers;
s3 slitting
Cutting the bubble entering the winding machine into two pieces, and rubbing and winding the two pieces of bubble on rubber rollers at two sides respectively;
s4 packaging
And (4) rolling and packaging the rolled PE film, and warehousing.
7. The method for preparing a bag-making fluffless packaging film according to the claim 6, wherein in S1, the parameters of the three-layer co-extrusion film blowing machine are as follows: the temperature of the inner layer screw material barrel is 210-215 ℃, the temperature of the middle layer screw material barrel is 195-200 ℃, the temperature of the outer layer screw material barrel is 210-215 ℃, the temperature of the die head runner is 210 ℃, the refrigeration temperature is 17-19 ℃, and the blow-up ratio is 1.3: 1.
8. The method for preparing a bagging fluffless packaging film according to claim 6, comprising the following steps:
s1 PE blown film
Preparing a thin film by adopting a three-layer co-extrusion film blowing method, respectively preparing an inner-layer base film, a middle-layer base film and an outer-layer base film by using a three-layer co-extrusion film blowing machine, and finally extruding and blowing the inner-layer base film, the middle-layer base film and the outer-layer base film from a screw through a die head of the three-layer co-extrusion film blowing machine to form a finished film;
s2 corona discharge
Corona is applied to the surface of the outer base film of the PE film, the voltage is 6.0V, and the machine speed is 50 m/min;
s3 winding
The PE film enters a winding machine through guide rollers;
s4 slitting
Cutting the bubble entering the winding machine into two pieces, and rubbing and winding the two pieces of bubble on rubber rollers at two sides respectively;
s5 packaging
And (4) rolling and packaging the rolled PE film, and warehousing.
9. The method for preparing a bagging fluffless packaging film according to claim 6, comprising the following steps:
s1 PE blown film
Preparing a thin film by adopting a three-layer co-extrusion film blowing method, respectively preparing an inner-layer base film, a middle-layer base film and an outer-layer base film by using a three-layer co-extrusion film blowing machine, and finally extruding and blowing the inner-layer base film, the middle-layer base film and the outer-layer base film from a screw through a die head of the three-layer co-extrusion film blowing machine to form a finished film;
s2 BOPA printing
Printing ink on the food-grade BOPA printing film;
s3 compounding and curing
Compounding and curing the PE film and the printed BOPA film;
s4 corona discharge
Corona treatment is carried out on the single surface of the BOPA surface by using a corona treatment machine, the voltage is 6.0V, and the machine speed is 50 m/min;
s5 winding
The PE film enters a winding machine through guide rollers;
s6 slitting
Cutting the bubble entering the winding machine into two pieces, and rubbing and winding the two pieces of bubble on rubber rollers at two sides respectively;
s7 packaging
And (4) rolling and packaging the rolled PE film, and warehousing.
CN202210548163.8A 2022-05-18 2022-05-18 Packaging film capable of preventing bag making from fluffing and manufacturing method thereof Pending CN114801388A (en)

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