CN111497396A - Aging-resistant co-extrusion packaging film and preparation method thereof - Google Patents

Aging-resistant co-extrusion packaging film and preparation method thereof Download PDF

Info

Publication number
CN111497396A
CN111497396A CN202010315038.3A CN202010315038A CN111497396A CN 111497396 A CN111497396 A CN 111497396A CN 202010315038 A CN202010315038 A CN 202010315038A CN 111497396 A CN111497396 A CN 111497396A
Authority
CN
China
Prior art keywords
layer
density polyethylene
polyethylene
packaging film
extrusion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010315038.3A
Other languages
Chinese (zh)
Inventor
谢德
黄本朴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhuhai Xutai Daily Necessities Co ltd
Original Assignee
Zhuhai Xutai Daily Necessities Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhuhai Xutai Daily Necessities Co ltd filed Critical Zhuhai Xutai Daily Necessities Co ltd
Priority to CN202010315038.3A priority Critical patent/CN111497396A/en
Publication of CN111497396A publication Critical patent/CN111497396A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • 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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/49—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle
    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • 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
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • 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
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of 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
    • 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
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/20—Carboxylic acid amides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/49—Phosphorus-containing compounds
    • C08K5/51—Phosphorus bound to oxygen
    • C08K5/52—Phosphorus bound to oxygen only
    • C08K5/527—Cyclic esters

Abstract

The invention provides an aging-resistant co-extrusion packaging film which comprises a polyethylene layer, an adhesive resin layer and a nylon layer which are sequentially attached and co-extruded, wherein the polyethylene layer accounts for 50-60% of the packaging film in percentage by mass; the proportion of the bonding resin layer is 23-27%; the proportion of the nylon layer is 18-22%; wherein, the polyethylene layer comprises 4 to 6 percent of antioxidant, 28 to 32 percent of low density polyethylene, 28 to 32 percent of linear low density polyethylene and 33 to 37 percent of medium density polyethylene according to the mass percentage. The aging-resistant co-extrusion packaging film disclosed by the invention can keep the basic performance unchanged for a long time under natural conditions, does not need frequent package replacement, saves the cost and reduces the manpower input. The invention also provides a preparation method of the aging-resistant co-extrusion packaging film, and the forming process is simple.

Description

Aging-resistant co-extrusion packaging film and preparation method thereof
Technical Field
The invention relates to the field of multilayer co-extrusion packaging films, in particular to an anti-aging co-extrusion packaging film and a preparation method thereof.
Background
The flexible package is a package in which the shape of a container is changed after the contents are filled or removed. Common flexible packaging materials are plastic films and include stretch wrap packaging and various bags. Stretch wrap packages are constructed from plastic film that has not yet been formed into the shape of the package by simply wrapping the film around the product or products to be packaged and holding it in place in some fashion. Plastic bags are shaped either before or at the same time as the product is being loaded. Most commonly, the plastic edges are heat sealed to form this shape.
The multilayer co-extruded film can meet the requirements of various mechanical properties of flexible packages, so that the multilayer co-extruded film is widely used, but the existing flexible package film is easy to age, and can begin to age after one year under natural conditions, and various properties begin to degrade.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the anti-aging co-extrusion packaging film, which can keep the basic performance unchanged for a long time under natural conditions, does not need frequent package replacement, saves the cost and reduces the labor input. The invention also provides a preparation method of the aging-resistant co-extrusion packaging film, and the forming process is simple.
The invention provides an aging-resistant co-extrusion packaging film which is characterized by comprising a co-extrusion polyethylene layer, an adhesive resin layer and a nylon layer which are sequentially attached from outside to inside,
according to the mass percentage of the packaging film, the polyethylene layer accounts for 50-60%; the proportion of the bonding resin layer is 23-27%; the proportion of the nylon layer is 18-22%;
wherein, the polyethylene layer comprises 3 to 6 percent of antioxidant, 28 to 32 percent of low density polyethylene, 28 to 35 percent of linear low density polyethylene and 33 to 37 percent of medium density polyethylene according to the mass percentage;
the antioxidant comprises N, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine and bis (octadecyl) pentaerythritol diphosphite;
the adhesive resin layer is composed of an adhesive resin; the nylon layer is composed of nylon.
In a preferred embodiment of the present invention, the ratio of N, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine to bis (octadecyl) pentaerythritol diphosphite is 1: 1.
In a preferred embodiment of the present invention, the polyethylene layer comprises, by mass, 5% of an antioxidant, 30% of a low density polyethylene, 30% of a linear low density polyethylene, and 35% of a medium density polyethylene.
In a preferred embodiment of the present invention, the binder resin is an ethylene acrylic acid resin.
The invention also provides a preparation method of the aging-resistant co-extrusion packaging film, which comprises the following steps:
s1 preparation of polyethylene layer raw material
Feeding the antioxidant, the low-density polyethylene, the linear low-density polyethylene and the medium-density polyethylene into a first screw extruder according to the formula amount, wherein the screw temperature of the first screw extruder is 200-220 ℃, the rotating speed is 40r/min, the extrusion pressure is 30MPa, and the extrusion temperature is 220 ℃.
S2 preparation of raw material for adhesive resin layer
The adhesive resin particles are fed into a second screw extruder according to the formula amount, the screw temperature of the second screw extruder is 220-240 ℃, the rotating speed is 37r/min, the extrusion pressure is 28MPa, and the extrusion temperature is 240 ℃.
S3 preparation of nylon layer raw material
The nylon particles are added into a third screw extruder according to the formula amount, the screw temperature of the third screw extruder is 230-245 ℃, the rotating speed is 55r/min, the extrusion pressure is 33MPa, and the extrusion temperature is 245 ℃.
S4, extrusion Molding
And simultaneously conveying the raw materials of the polyethylene layer, the adhesive resin layer and the nylon layer to a machine head of a three-layer co-extruder, and co-extruding and film blowing the three raw materials in a molten state for forming.
The invention has the beneficial effects that:
according to the invention, through optimizing the proportion of the low-density polyethylene, the linear low-density polyethylene and the medium-density polyethylene in the polyethylene layer and compounding the combined antioxidant, the aging time is delayed, the aging time is prolonged by at least 2 times compared with that of similar products, the excellent mechanical property is kept for a long time, and the packaging film does not need to be frequently replaced after the product which needs to be stored for a long time is used, so that the burden is reduced, the cost is saved, and the labor input is reduced.
Detailed Description
The scheme of the application is further described below with reference to specific examples:
example 1
An aging-resistant co-extrusion packaging film comprises a polyethylene layer, an adhesive resin layer and a nylon layer which are sequentially attached and co-extruded from outside to inside. The polyethylene layer is an outer layer, and the nylon layer is an inner layer.
According to the mass percentage of the packaging film, the polyethylene layer accounts for 55%; the proportion of the bonding resin layer is 25%; the nylon layer accounts for 20%.
Wherein, the polyethylene layer comprises 5 percent of antioxidant, 30 percent of low density polyethylene, 30 percent of linear low density polyethylene and 35 percent of medium density polyethylene according to the mass percentage.
The antioxidant comprises N, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine and bis (octadecyl) pentaerythritol diphosphite; the ratio of the N, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine to the bis (octadecyl) pentaerythritol diphosphite was 1: 1.
Irganox1098 from Pasteur is used as the N, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine.
The bis (octadecyl) pentaerythritol diphosphite is 618 type product of Angel synthetic chemistry Limited in Yixing city.
The adhesive resin layer is composed of an adhesive resin; the adhesive resin is ethylene acrylic resin, specifically 41E710 from DuPont. The nylon layer is composed of nylon (PA).
The preparation method of the aging-resistant co-extruded packaging film comprises the following steps:
s1 preparation of polyethylene layer raw material
Feeding the antioxidant, the low-density polyethylene, the linear low-density polyethylene and the medium-density polyethylene into a first screw extruder according to the formula amount, wherein the screw temperature of the first screw extruder is 200-220 ℃, the rotating speed is 40r/min, the extrusion pressure is 30MPa, and the extrusion temperature is 220 ℃.
S2 preparation of raw material for adhesive resin layer
The adhesive resin particles are fed into a second screw extruder according to the formula amount, the screw temperature of the second screw extruder is 220-240 ℃, the rotating speed is 37r/min, the extrusion pressure is 28MPa, and the extrusion temperature is 240 ℃.
S3 preparation of nylon layer raw material
The nylon particles are added into a third screw extruder according to the formula amount, the screw temperature of the third screw extruder is 230-245 ℃, the rotating speed is 55r/min, the extrusion pressure is 33MPa, and the extrusion temperature is 245 ℃.
S4, extrusion Molding
And simultaneously conveying the raw materials of the polyethylene layer, the adhesive resin layer and the nylon layer to a machine head of a three-layer co-extruder, and co-extruding and film blowing the three raw materials in a molten state for forming.
Comparative example 1
An aging-resistant co-extrusion packaging film comprises a polyethylene layer, an adhesive resin layer and a nylon layer which are sequentially attached and co-extruded from outside to inside.
According to the mass percentage of the packaging film, the polyethylene layer accounts for 55%; the proportion of the bonding resin layer is 25%; the nylon layer accounts for 20%.
Wherein, the polyethylene layer comprises 5 percent of antioxidant, 30 percent of low density polyethylene, 30 percent of linear low density polyethylene and 35 percent of medium density polyethylene according to the mass percentage.
The antioxidant is N, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine, and Irganox1098 from Pasteur is selected.
The adhesive resin layer is composed of an adhesive resin; the adhesive resin is ethylene acrylic resin, specifically 41E710 from DuPont. The nylon layer is composed of nylon (PA).
The preparation process is the same as in example 1.
Comparative example 2
An aging-resistant co-extrusion packaging film comprises a polyethylene layer, an adhesive resin layer and a nylon layer which are sequentially attached and co-extruded from outside to inside.
According to the mass percentage of the packaging film, the polyethylene layer accounts for 55%; the proportion of the bonding resin layer is 25%; the nylon layer accounts for 20%.
Wherein, the polyethylene layer comprises 5 percent of antioxidant, 30 percent of low density polyethylene, 30 percent of linear low density polyethylene and 35 percent of medium density polyethylene according to the mass percentage.
The antioxidant is bis (octadecyl) pentaerythritol diphosphite, and is 618 model number product of Yixing city Angel synthetic chemistry Co.
The adhesive resin layer is composed of an adhesive resin; the adhesive resin is ethylene acrylic resin, specifically 41E710 from DuPont. The nylon layer is composed of nylon (PA).
The preparation process is the same as in example 1.
The aging resistance test was carried out on example 1 and comparative examples 1 to 2:
the co-extruded packaging films prepared in the embodiment 1 and the comparative examples 1-2 are subjected to stretching, puncture resistance and welding tests, and the co-extruded packaging films are subjected to stretching, puncture resistance and welding tests again after being detected at the low temperature of-30 ℃ for 240 hours and the high temperature of 90 ℃ for 240 hours. The test results were as follows:
-30 ℃ low temperature 240 hours:
Figure BDA0002459115400000061
high temperature at 90 ℃ for 240 hours:
Figure BDA0002459115400000062
according to earlier researches, when N, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexamethylene diamine and bis (octadecyl) pentaerythritol diphosphite are respectively compounded with the polyethylene layer for use, the antioxidant performance is improved to a certain extent, specifically, after the detection of 120 hours at the low temperature of-30 ℃ and 120 hours at the high temperature of 90 ℃, the tensile, puncture-resistant and welding tests are carried out, the performance change is very slight, but after 120 hours, the performance is continuously reduced, and the performance change is obvious after 240 hours.
In this example 1, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine and bis (octadecyl) pentaerythritol diphosphite are used in combination, and are compounded with low density polyethylene, linear low density polyethylene and medium density polyethylene in a polyethylene layer, so that the aging time of the packaging film is delayed, the aging time is at least 2 times longer than that of similar products, and excellent mechanical properties are maintained for a long time. The articles which need to be preserved for a long time do not need to be frequently replaced after being used, thereby reducing the burden, saving the cost and reducing the manpower input
The above preferred embodiments should be considered as examples of the embodiments of the present application, and technical deductions, substitutions, improvements and the like similar to, similar to or based on the embodiments of the present application should be considered as the protection scope of the present patent.

Claims (5)

1. An aging-resistant co-extrusion packaging film is characterized by comprising a co-extrusion polyethylene layer, an adhesive resin layer and a nylon layer which are sequentially attached from outside to inside,
according to the mass percentage of the packaging film, the polyethylene layer accounts for 50-60%; the proportion of the bonding resin layer is 23-27%; the proportion of the nylon layer is 18-22%;
wherein, the polyethylene layer comprises 3 to 6 percent of antioxidant, 28 to 32 percent of low density polyethylene, 28 to 35 percent of linear low density polyethylene and 33 to 37 percent of medium density polyethylene according to the mass percentage;
the antioxidant comprises N, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine and bis (octadecyl) pentaerythritol diphosphite;
the adhesive resin layer is composed of an adhesive resin; the nylon layer is composed of nylon.
2. The weatherable coextruded packaging film of claim 1, wherein the amount ratio of N, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine to bis (octadecyl) pentaerythritol diphosphite is 1: 1.
3. The aging-resistant co-extruded packaging film of claim 2,
the polyethylene layer comprises, by mass, 5% of an antioxidant, 30% of low density polyethylene, 30% of linear low density polyethylene and 35% of medium density polyethylene.
4. The aging-resistant co-extruded packaging film of claim 1 wherein the bonding resin is an ethylene acrylic acid resin.
5. A method for preparing the aging-resistant co-extruded packaging film of any one of claims 1-4, characterized by comprising the following steps:
s1 preparation of polyethylene layer raw material
Feeding the antioxidant, the low-density polyethylene, the linear low-density polyethylene and the medium-density polyethylene into a first screw extruder according to the formula amount, wherein the screw temperature of the first screw extruder is 200-220 ℃, the rotating speed is 40r/min, the extrusion pressure is 30MPa, and the extrusion temperature is 220 ℃;
s2 preparation of raw material for adhesive resin layer
Feeding the adhesive resin particles into a second screw extruder according to the formula amount, wherein the screw temperature of the second screw extruder is 220-240 ℃, the rotating speed is 37r/min, the extrusion pressure is 28MPa, and the extrusion temperature is 240 ℃;
s3 preparation of nylon layer raw material
Feeding the nylon particles into a third screw extruder according to the formula amount, wherein the screw temperature of the third screw extruder is 230-245 ℃, the rotating speed is 55r/min, the extrusion pressure is 33MPa, and the extrusion temperature is 245 ℃;
s4, extrusion Molding
And simultaneously conveying the raw materials of the polyethylene layer, the adhesive resin layer and the nylon layer to a machine head of a three-layer co-extruder, and co-extruding and film blowing the three raw materials in a molten state for forming.
CN202010315038.3A 2020-04-21 2020-04-21 Aging-resistant co-extrusion packaging film and preparation method thereof Pending CN111497396A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010315038.3A CN111497396A (en) 2020-04-21 2020-04-21 Aging-resistant co-extrusion packaging film and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010315038.3A CN111497396A (en) 2020-04-21 2020-04-21 Aging-resistant co-extrusion packaging film and preparation method thereof

Publications (1)

Publication Number Publication Date
CN111497396A true CN111497396A (en) 2020-08-07

Family

ID=71878746

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010315038.3A Pending CN111497396A (en) 2020-04-21 2020-04-21 Aging-resistant co-extrusion packaging film and preparation method thereof

Country Status (1)

Country Link
CN (1) CN111497396A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112646387A (en) * 2020-12-21 2021-04-13 浙江大汇新材料有限公司 Inner film structure for packaging
CN114474651A (en) * 2021-12-30 2022-05-13 大禾科技发展(南京)有限公司 Preparation method of rice mildew-proof freshness protection package
CN114806148A (en) * 2022-05-25 2022-07-29 何平安 Nylon co-extrusion film for wind power blade molding and production process thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104448641A (en) * 2014-12-12 2015-03-25 广东银禧科技股份有限公司 Polyvinyl alcohol wire for fused deposition molding and processing method of polyvinyl alcohol wire
CN106132701A (en) * 2014-03-21 2016-11-16 德国英菲亚纳有限责任两合公司 Packing film

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106132701A (en) * 2014-03-21 2016-11-16 德国英菲亚纳有限责任两合公司 Packing film
CN104448641A (en) * 2014-12-12 2015-03-25 广东银禧科技股份有限公司 Polyvinyl alcohol wire for fused deposition molding and processing method of polyvinyl alcohol wire

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李华: "《主要包装物特性与资源再生实用手册》", 31 October 2010, 北京：中国环境科学出版社 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112646387A (en) * 2020-12-21 2021-04-13 浙江大汇新材料有限公司 Inner film structure for packaging
CN112646387B (en) * 2020-12-21 2023-02-17 浙江大汇新材料有限公司 Inner film structure for packaging
CN114474651A (en) * 2021-12-30 2022-05-13 大禾科技发展(南京)有限公司 Preparation method of rice mildew-proof freshness protection package
CN114806148A (en) * 2022-05-25 2022-07-29 何平安 Nylon co-extrusion film for wind power blade molding and production process thereof

Similar Documents

Publication Publication Date Title
CN111497396A (en) Aging-resistant co-extrusion packaging film and preparation method thereof
CN110774714B (en) Degradable two-way stretching polylactic acid cigarette film and preparation method thereof
US4486507A (en) Transparent, shrinkable film, consisting of one or several layers
EP2152510B1 (en) Biodegradable multilayer polymeric films and packages produced therefrom
EP2939948B1 (en) Wrap film
WO2009157948A1 (en) Cross-laminated elastic film
CN111483201A (en) High-barrier flexible packaging film and preparation process thereof
KR20200077666A (en) Film for packaging food
CN102285174A (en) Composite packaging film and preparation method thereof
CN109648899A (en) A kind of polyethylene flour bag packaging dedicated film
WO2018185235A1 (en) Film, package and method for cheese ripening and preservation
JP7053157B2 (en) Manufacturing method of melt extrusion molded film for sealing
CN115635750A (en) Low-temperature-resistant three-layer co-extrusion heavy packaging film
CN109263163A (en) A kind of film of Anti- tarnishing
JP6907404B2 (en) Resin composition for sealant, multilayer film for sealant, heat-sealing laminated film and packaging
CN105001488A (en) Plastic film blending material, and processing method thereof
CN110834451B (en) Biaxially oriented polyethylene film BOPE composition, biaxially oriented polyethylene film and composite film and application thereof
WO2015001516A1 (en) Stretch plastic film
CN111483203A (en) High-barrier packaging film with self-adhesion function and preparation method thereof
RU148548U1 (en) MULTILAYER LAMINATED THERMOFORMABLE BARRIER POLYMER FILM
RU2554133C2 (en) Method of producing polymer film material
JP7464441B2 (en) Non-oriented multi-layer film
WO2023176482A1 (en) Method for producing polyolefin resin film
CN111483202A (en) High-barrier anti-seepage heavy packaging film and preparation method thereof
KR20150028210A (en) Low price vacuum packaging film

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20200807

RJ01 Rejection of invention patent application after publication