CN109094160B - FFS packaging film and preparation method thereof - Google Patents

FFS packaging film and preparation method thereof Download PDF

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CN109094160B
CN109094160B CN201811266704.8A CN201811266704A CN109094160B CN 109094160 B CN109094160 B CN 109094160B CN 201811266704 A CN201811266704 A CN 201811266704A CN 109094160 B CN109094160 B CN 109094160B
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packaging film
weight
lldpe
ffs packaging
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CN109094160A (en
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李忠
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Kunshan Jinmeng Plastic Film Co ltd
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Kunshan Jinmeng Plastic Film 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
    • 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
    • B32B27/18—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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/582—Tearability
    • 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
    • B32B2307/746—Slipping, anti-blocking, low friction
    • 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

Abstract

The invention provides an FFS packaging film and a preparation method thereof. The FFS packaging film comprises an outer layer, a middle layer and an inner layer which are sequentially arranged from outside to inside according to the weight ratio of (1-2): 1-3): 1, wherein the outer layer comprises 30-40 parts of LDPE2420H and 60-70 parts of LLDPE LL0220AA in parts by weight; the middle layer comprises 30-40 parts of LDPE2426H and 60-70 parts of LLDPE LL0220 AA; the inner layer comprises 30-40 parts of LDPE2426H, 60-70 parts of LLDPE 1002BU, 1-2 parts of an opening agent 10063 and 1-2 parts of a smooth master batch. The preparation method of the FFS packaging film has the advantages of simple production process, low equipment requirement, low cost and high efficiency, and the prepared film has good mechanical property and surface friction property and is not adhered when in use.

Description

FFS packaging film and preparation method thereof
Technical Field
The invention belongs to the technical field of packaging films, relates to a packaging film and a preparation method thereof, and particularly relates to an FFS packaging film and a preparation method thereof.
Background
The FFS (Form-Fill-Seal) three-layer co-extrusion heavy packaging film is a novel packaging material developed in recent years in China, can realize high-speed continuous operation of a plurality of procedures such as one-time automatic forming (Form), automatic opening filling (Fill) and automatic bag opening heat sealing (Seal), and is particularly suitable for large-batch industrial high-speed packaging lines.
In order to ensure that the repackaging film has higher mechanical strength and heat sealing strength, the repackaging film is prepared by mixing a hexene or octene copolymerized metallocene linear low density polyethylene resin (m-LLDP), a hexene or octene copolymerized linear low density polyethylene resin (LLDPE), a homopolymerized low density polyethylene resin (LDPE) and a butene copolymerized high density polyethylene resin (HDPE). The existing heavy packaging film formula has a plurality of raw materials, and the prepared heavy packaging film has unsatisfactory strength. The packaging film is also prepared by mixing a large amount of hexene or octene copolymerized linear low density polyethylene resin (m-LLDPE), homopolymerized low density polyethylene resin (LDPE) and butene copolymerized high density polyethylene resin (HDPE), but the prepared heavy packaging film has rigorous requirements on equipment processing capacity due to LLDPE, m-LLDPE and HDPE with higher strength and higher rigidity, and is difficult to be widely applied and produced, while the existing common solution is to add LDPE to improve the processing capacity of the whole raw material, but the addition of LDPE greatly reduces the strength of the heavy packaging film and reduces the economic value of the product.
CN103059402A discloses an FFS single-layer heavy packaging film and a preparation method thereof, wherein the mechanical property of the FFS single-layer heavy packaging film is improved by adopting ethylene-vinyl acetate copolymer, metallocene linear low-density polyethylene and ultra-low-density polyethylene; CN103029388A discloses a three-layer co-extrusion heavy packaging film and a preparation method thereof, which also improves the mechanical property, the heat sealing property and the surface friction property of the three-layer co-extrusion heavy packaging film by selecting proper m-LLDPE, MDPE (medium density polyethylene) and EVA (ethylene-vinyl acetate copolymer) raw materials, but the FFS single-layer heavy packaging film obtained by the patent is easy to generate adhesion in the reprocessing process.
CN102452204A discloses an FFS film for heavy packaging, which has a three-layer structure, wherein the outer layer: middle layer: the thickness ratio of the inner layer is between 1:1:1 and 1:3: 1; the outer layer contains two kinds of m-LLDPE which are mixed with LDPE according to a certain proportion, and a certain amount of processing aid, antistatic agent and the like can also be added; the middle layer contains 1 m-LLDPE which is matched with HDPE, LDPE and titanium dioxide according to a certain proportion; the inner layer contains 2 kinds of m-LLDPE which is matched with LDPE according to a certain proportion, and a certain amount of processing aid, opening agent and the like can be added; the m-LLDPE related by the invention is hexene copolymerization m-LLDPE. This heavily pack with FFS film use LDPE volume is more, influences the bulk strength of film, and simultaneously, HDPE is harsh to the equipment requirement, needs to purchase and customizes professional equipment, has not only increased the manufacturing cost of heavily packing membrane but also the production technology degree of difficulty is big, is difficult to use widely.
Therefore, there is a need to provide an FFS packaging film that has both excellent mechanical properties and surface friction properties of the film, as well as ease of processing.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the FFS packaging film and the preparation method thereof, and the prepared FFS packaging film is not adhered in use and has good mechanical property and surface friction property.
In order to achieve the purpose, the invention adopts the following technical scheme:
one purpose of the invention is to provide an FFS packaging film, which comprises an outer layer, a middle layer and an inner layer which are sequentially arranged from outside to inside, wherein the weight ratio of the outer layer, the middle layer and the inner layer is (1-2): 1-3): 1, and the FFS packaging film comprises, in parts by weight,
the outer layer comprises 30-40 parts of LDPE2420H and 60-70 parts of LLDPE LL0220 AA;
the middle layer comprises 30-40 parts of LDPE2426H and 60-70 parts of LLDPE LL0220 AA;
the inner layer comprises 30-40 parts of LDPE2426H, 60-70 parts of LLDPE 1002BU, 1-2 parts of an opening agent 10063 and 1-2 parts of a smooth master batch.
In the invention, three layers of different materials are adopted, and the proportion of each layer is adjusted, so that the prepared FFS packaging film is not adhered when in use and has good mechanical property and surface friction property of the film; wherein, the outer layer adopts LDPE2420H and LLDPE LL0220AA as raw materials, the middle layer adopts LDPE2426H and LLDPE LL0220AA as raw materials, and the mechanical property of the film is improved by adjusting the dosage of the raw materials, the inner layer adopts LDPE2426H, LLDPE 1002BU, the opening agent 10063 and the smooth master batch as raw materials, and the film has good processing performance and is not adhered during processing and use by adjusting the dosage of the raw materials, so that the prepared FFS packaging film has good friction performance.
Specifically, the outer layer comprises 30-40 parts by weight of LDPE2420H and 60-70 parts by weight of LLDPE LL0220AA, for example, the LDPE2420H is 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts and 40 parts by weight, and the LLDPE LL0220AA is 60 parts, 61 parts, 62 parts, 63 parts, 64 parts, 65 parts, 66 parts, 67 parts, 68 parts, 69 parts and 70 parts by weight.
The middle layer comprises 30-40 parts of LDPE2426H and 60-70 parts of LLDPE LL0220AA, for example, the LDPE2426H is 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts and 40 parts by weight, and the LLDPE LL0220AA is 60 parts, 61 parts, 62 parts, 63 parts, 64 parts, 65 parts, 66 parts, 67 parts, 68 parts, 69 parts and 70 parts by weight.
The inner layer comprises 30-40 parts of LDPE2426H, 60-70 parts of LLDPE 1002BU, 1-2 parts of an opening agent 10063 and 1-2 parts of a slip master batch, for example, the LDPE2426H comprises 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts and 40 parts by weight, the LLDPE 1002BU comprises 60 parts, 61 parts, 62 parts, 63 parts, 64 parts, 65 parts, 66 parts, 67 parts, 68 parts, 69 parts and 70 parts by weight, the opening agent 10063 comprises 1 part, 1.1 part, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts and 2 parts by weight, and the slip master batch comprises 1 part, 1.1 part, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.8 parts, 1.9 parts and 2 parts by weight.
In the invention, the weight ratio of the outer layer, the middle layer and the inner layer is (1-2): 1-3): 1, for example, the weight ratio of the outer layer, the middle layer and the inner layer is 1:1:1, 1:2:1, 1:3:1, 2:1:1, 2:2:1, 2:3:1 and the like.
The outer layer comprises 30-35 parts by weight of LDPE2420H and 65-70 parts by weight of LLDPE LL0220AA, for example, the LDPE2420H is 30 parts, 31 parts, 32 parts, 33 parts, 34 parts and 35 parts by weight, and the LLDPE LL0220AA is 65 parts, 66 parts, 67 parts, 68 parts, 69 parts and 70 parts by weight.
The outer layer comprises 33 parts by weight LDPE2420H and 67 parts by weight LLDPE LL0220 AA.
The middle layer comprises 30-35 parts of LDPE2426H and 65-70 parts of LLDPE LL0220AA in parts by weight, for example, the LDPE2426H is 30 parts, 31 parts, 32 parts, 33 parts, 34 parts and 35 parts in parts by weight, and the LLDPE LL0220AA is 65 parts, 66 parts, 67 parts, 68 parts, 69 parts and 70 parts in parts by weight.
The middle layer comprises 33 parts by weight of LDPE2426H and 67 parts by weight of LLDPE LL0220 AA.
The inner layer comprises, by weight, 30-35 parts of LDPE2426H, 65-70 parts of LLDPE 1002BU, 1-1.5 parts of an opening agent 10063 and 1-1.5 parts of a smooth master batch, for example, 30 parts, 31 parts, 32 parts, 33 parts, 34 parts and 35 parts of LDPE2426H, 65 parts, 66 parts, 67 parts, 68 parts, 69 parts and 70 parts of LLDPE 1002BU, 1 part, 1.1 part, 1.2 parts, 1.3 parts, 1.4 parts and 1.5 parts of the opening agent 10063, and 1 part, 1.1 part, 1.2 parts, 1.3 parts and 1.5 parts of the smooth master batch.
The inner layer comprises 33 parts by weight of LDPE2426H, 67 parts by weight of LLDPE 1002BU, 1.2 parts by weight of an opening agent 10063 and 1.2 parts by weight of a slip master batch.
The addition of the slip master batch can effectively avoid the adhesion of the film, and preferably, the slip master batch is the slip master batch 505E.
Another object of the present invention is to provide a method for preparing an FFS packaging film according to the first object, comprising the steps of:
1) mixing materials: mixing the outer layer preparation raw materials according to the formula amount, conveying the mixture to an extruder for mixing to obtain an outer layer raw material mixture, mixing the middle layer preparation raw materials according to the formula amount, conveying the mixture to the extruder for mixing to obtain a middle layer raw material mixture, mixing the inner layer preparation raw materials according to the formula amount, and conveying the mixture to the extruder for mixing to obtain an inner layer raw material mixture;
2) preparing materials: mixing the outer layer raw material mixture, the middle layer raw material mixture and the inner layer raw material mixture prepared in the step 1) according to a ratio;
3) extruding to form a film: and (3) simultaneously conveying the film materials after the burdening in the step 2) to a three-layer co-extrusion extruder for extrusion molding to obtain the FFS packaging film.
Preferably, the preparation method comprises the following steps:
1) mixing materials: mixing the outer layer preparation raw materials according to the formula amount, conveying the mixture to an extruder for mixing to obtain an outer layer raw material mixture, mixing the middle layer preparation raw materials according to the formula amount, conveying the mixture to the extruder for mixing to obtain a middle layer raw material mixture, mixing the inner layer preparation raw materials according to the formula amount, and conveying the mixture to the extruder for mixing to obtain an inner layer raw material mixture; wherein the screw temperature of the extruder is 120-150 ℃, the head temperature is 130-160 ℃, the screw rotation speed is 20-50 r/min, and the extrusion pressure is 20-40 MPa; for example, the screw temperature of the extruder is 120 ℃, 130 ℃, 140 ℃, 150 ℃, the head temperature is 130 ℃, 140 ℃, 150 ℃, 160 ℃, the screw rotation speed is 20r/min, 25r/min, 30r/min, 35r/min, 40r/min, 45r/min, 50r/min, the extrusion pressure is 20MPa, 21MPa, 22MPa, 23MPa, 24MPa, 25MPa, 26MPa, 27MPa, 28MPa, 29MPa, 30MPa, 31MPa, 32MPa, 33MPa, 34MPa, 35MPa, 36MPa, 37MPa, 38MPa, 39MPa, 40 MPa;
2) preparing materials: mixing the outer layer raw material mixture, the middle layer raw material mixture and the inner layer raw material mixture prepared in the step 1) according to a ratio;
3) extruding to form a film: and (3) simultaneously conveying the film materials after the burdening in the step 2) to a three-layer co-extrusion extruder for extrusion molding to obtain the FFS packaging film.
Compared with the prior art, the invention has the beneficial effects that:
(1) the FFS packaging film disclosed by the invention has the advantages that three layers of different materials are selected, the proportion of each layer is adjusted, so that the prepared film has good mechanical property and surface friction property, and is not adhered when in use; the prepared FFS packaging film has the tensile strength of more than 65MPa, the elongation at break of more than 600%, the tear strength of more than 125kN/m, the friction coefficient of 0.3-0.6, and no adhesion in use.
(2) The preparation method of the FFS packaging film has the advantages of simple production process, low equipment requirement, low cost and high efficiency.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments.
Unless otherwise specified, various starting materials of the present invention are commercially available or prepared according to conventional methods in the art.
Example 1
The FFS packaging film of the embodiment comprises an outer layer, a middle layer and an inner layer which are sequentially arranged from outside to inside, wherein the weight ratio of the outer layer to the middle layer to the inner layer is 1:2:1, and the FFS packaging film comprises the following components in parts by weight,
the outer layer comprises 33 parts LDPE2420H and 67 parts LLDPE LL0220 AA;
the middle layer comprises 37 parts of LDPE2426H and 67 parts of LLDPE LL0220 AA;
the inner layer comprises 33 parts of LDPE2426H, 67 parts of LLDPE 1002BU, 1.2 parts of an opening agent 10063 and 1.2 parts of a slip master batch.
The preparation method of the FFS packaging film of the embodiment includes the following steps:
1) mixing materials: mixing the outer layer preparation raw materials according to the formula amount, conveying the mixture to an extruder for mixing to obtain an outer layer raw material mixture, mixing the middle layer preparation raw materials according to the formula amount, conveying the mixture to the extruder for mixing to obtain a middle layer raw material mixture, mixing the inner layer preparation raw materials according to the formula amount, and conveying the mixture to the extruder for mixing to obtain an inner layer raw material mixture; wherein the screw temperature of the extruder is 130 ℃, the head temperature is 140 ℃, the screw rotation speed is 40r/min, and the extrusion pressure is 30 MPa;
2) preparing materials: mixing the outer layer raw material mixture, the middle layer raw material mixture and the inner layer raw material mixture prepared in the step 1) according to a ratio;
3) extruding to form a film: and (3) simultaneously conveying the film materials after the burdening in the step 2) to a three-layer co-extrusion extruder for extrusion molding to obtain the FFS packaging film.
Example 2
The FFS packaging film of the embodiment comprises an outer layer, a middle layer and an inner layer which are sequentially arranged from outside to inside, wherein the weight ratio of the outer layer to the middle layer to the inner layer is 2:3:1, and the FFS packaging film comprises the following components in parts by weight,
the outer layer comprises 30 parts LDPE2420H and 70 parts LLDPE LL0220 AA;
the middle layer comprises 30 parts of LDPE2426H and 70 parts of LLDPE LL0220 AA;
the inner layer comprises 30 parts of LDPE2426H, 65 parts of LLDPE 1002BU, 1.5 parts of an opening agent 10063 and 2 parts of a slip master batch.
The preparation method of the FFS packaging film of this embodiment is the same as that of embodiment 1, and is not repeated herein.
Example 3
The FFS packaging film of the embodiment comprises an outer layer, a middle layer and an inner layer which are sequentially arranged from outside to inside, wherein the weight ratio of the outer layer to the middle layer to the inner layer is 1:3:1, and the FFS packaging film comprises the following components in parts by weight,
the outer layer comprises 40 parts LDPE2420H and 65 parts LLDPE LL0220 AA;
the middle layer comprises 35 parts of LDPE2426H and 65 parts of LLDPE LL0220 AA;
the inner layer comprises 40 parts of LDPE2426H, 62 parts of LLDPE 1002BU, 2 parts of an opening agent 10063 and 1 part of a slip master batch.
The preparation method of the FFS packaging film of this embodiment is the same as that of embodiment 1, and is not repeated herein.
Example 4
The FFS packaging film of the embodiment comprises an outer layer, a middle layer and an inner layer which are sequentially arranged from outside to inside, wherein the weight ratio of the outer layer to the middle layer to the inner layer is 2:1:1, wherein in parts by weight,
the outer layer comprises 32 parts LDPE2420H and 68 parts LLDPE LL0220 AA;
the middle layer comprises 36 parts of LDPE2426H and 66 parts of LLDPE LL0220 AA;
the inner layer comprises 35 parts of LDPE2426H, 70 parts of LLDPE 1002BU, 1 part of an opening agent 10063 and 1 part of a slip master batch.
The preparation method of the FFS packaging film of this embodiment is the same as that of embodiment 1, and is not repeated herein.
Example 5
The FFS packaging film of the embodiment comprises an outer layer, a middle layer and an inner layer which are sequentially arranged from outside to inside, wherein the weight ratio of the outer layer to the middle layer to the inner layer is 1:2:1, and the FFS packaging film comprises the following components in parts by weight,
the outer layer comprises 40 parts LDPE2420H and 70 parts LLDPE LL0220 AA;
the middle layer comprises 35 parts of LDPE2426H and 70 parts of LLDPE LL0220 AA;
the inner layer comprises 40 parts of LDPE2426H, 70 parts of LLDPE 1002BU, 2 parts of an opening agent 10063 and 2 parts of a slip master batch.
The preparation method of the FFS packaging film of this embodiment is the same as that of embodiment 1, and is not repeated herein.
Comparative example 1
The comparative example is different from example 1 in that the raw materials of the outer layer, the middle layer and the inner layer are all LDPE2420H, and the rest is the same as example 1.
Comparative example 2
The comparative example is different from example 1 in that the raw materials of the outer layer, the middle layer and the inner layer are all LDPE2426H, and the rest is the same as example 1.
Comparative example 3
This comparative example is different from example 1 in that the inner layer does not contain the opening agent 10063, and the others are the same as example 1.
Comparative example 4
The comparative example is different from example 1 in that the inner layer does not contain the slip base particle, and the others are the same as example 1.
The FFS packaging films prepared in examples 1 to 5 and comparative examples 1 to 4 were subjected to performance tests, and the test results are shown in table 1.
TABLE 1
Figure BDA0001845047150000091
Figure BDA0001845047150000101
As can be seen from table 1, compared with comparative examples 1 to 4, the FFS packaging film of the present invention has three layers of different materials and the ratio of each layer is adjusted so that the obtained film has good mechanical properties and surface friction properties, and is not sticky when in use; the prepared FFS packaging film has the tensile strength of more than 65MPa, the elongation at break of more than 600%, the tear strength of more than 125kN/m, the friction coefficient of 0.3-0.6, and can not be adhered when in use. The preparation method of the FFS packaging film has the advantages of simple production process, low equipment requirement, low cost and high efficiency.
The present invention is illustrated by the above-mentioned examples, but the present invention is not limited to the above-mentioned detailed process equipment and process flow, i.e. it is not meant to imply that the present invention must rely on the above-mentioned detailed process equipment and process flow to be practiced. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.

Claims (9)

1. An FFS packaging film with tensile strength of more than 65MPa, elongation at break of more than 600%, tear strength of more than 125kN/m and friction coefficient of 0.3-0.6 is characterized by comprising an outer layer, a middle layer and an inner layer which are sequentially arranged from outside to inside, wherein the weight ratio of the outer layer, the middle layer and the inner layer is (1-2) to (1-3) to 1, and the FFS packaging film comprises, in parts by weight,
the outer layer comprises 30-40 parts of LDPE2420H and 60-70 parts of LLDPE LL0220 AA;
the middle layer comprises 30-40 parts of LDPE2426H and 60-70 parts of LLDPE LL0220 AA;
the inner layer comprises 30-40 parts of LDPE2426H, 60-70 parts of LLDPE 1002BU, 1-2 parts of an opening agent 10063 and 1-2 parts of a slip master batch, wherein the slip master batch is slip master batch 505E.
2. The FFS packaging film of claim 1 wherein the outer layer, the middle layer, and the inner layer are in a weight ratio of 1:2: 1.
3. The FFS packaging film of claim 1 or claim 2 wherein the outer layer comprises 30 to 35 parts by weight LDPE2420H and 65 to 70 parts by weight LLDPE LL0220 AA.
4. The FFS packaging film of claim 1 wherein the outer layer comprises 33 parts LDPE2420H and 67 parts LLDPE LL0220AA by weight parts.
5. The FFS packaging film of claim 1, wherein the middle layer comprises 30-35 parts by weight LDPE2426H and 65-70 parts by weight LLDPE LL0220 AA.
6. The FFS packaging film of claim 1 wherein the middle layer comprises 33 parts LDPE2426H and 67 parts LLDPE LL0220AA by weight parts.
7. The FFS packaging film of claim 1, wherein the inner layer comprises 30-35 parts by weight of LDPE2426H, 65-70 parts by weight of LLDPE 1002BU, 1-1.5 parts by weight of an opening agent 10063, and 1-1.5 parts by weight of a slip master batch.
8. The FFS packaging film of claim 1 wherein the inner layer comprises 33 parts LDPE2426H, 67 parts LLDPE 1002BU, 1.2 parts opener 10063, and 1.2 parts slip masterbatch by weight.
9. A method of making the FFS packaging film of any of claims 1-8, wherein the method of making comprises the steps of:
1) mixing materials: mixing the outer layer preparation raw materials according to the formula amount, conveying the mixture to an extruder for mixing to obtain an outer layer raw material mixture, mixing the middle layer preparation raw materials according to the formula amount, conveying the mixture to the extruder for mixing to obtain a middle layer raw material mixture, mixing the inner layer preparation raw materials according to the formula amount, and conveying the mixture to the extruder for mixing to obtain an inner layer raw material mixture;
2) preparing materials: mixing the outer layer raw material mixture, the middle layer raw material mixture and the inner layer raw material mixture prepared in the step 1) according to a ratio;
3) extruding to form a film: and (3) simultaneously conveying the film materials after the burdening in the step 2) to a three-layer co-extrusion extruder for extrusion molding to obtain the FFS packaging film.
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CN111016371A (en) * 2019-12-31 2020-04-17 诚德科技股份有限公司 High-strength polyethylene composite film and preparation method thereof
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