CN115556449A - Enhanced liquid packaging composite film - Google Patents

Enhanced liquid packaging composite film Download PDF

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Publication number
CN115556449A
CN115556449A CN202211124563.2A CN202211124563A CN115556449A CN 115556449 A CN115556449 A CN 115556449A CN 202211124563 A CN202211124563 A CN 202211124563A CN 115556449 A CN115556449 A CN 115556449A
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CN
China
Prior art keywords
layer film
film
liquid packaging
packaging composite
outer layer
Prior art date
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Pending
Application number
CN202211124563.2A
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Chinese (zh)
Inventor
顾锁娟
王海平
刘琳
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.)
Changzhou Huajian Pharmaceutical Packaging Material Co ltd
Original Assignee
Changzhou Qigang New Material 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 Changzhou Qigang New Material Co ltd filed Critical Changzhou Qigang New Material Co ltd
Priority to CN202211124563.2A priority Critical patent/CN115556449A/en
Publication of CN115556449A publication Critical patent/CN115556449A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/32Layered products comprising a layer of synthetic resin comprising polyolefins
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/06Layered 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
    • B32B27/08Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D65/00Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38Packaging materials of special type or form
    • B65D65/40Applications of laminates for particular packaging purposes
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18Manufacture of films or sheets
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02Characterised 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
    • C08J2323/04Homopolymers or copolymers of ethene
    • C08J2323/06Polyethene
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02Characterised 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
    • C08J2323/04Homopolymers or copolymers of ethene
    • C08J2323/08Copolymers of ethene
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02Characterised 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
    • C08J2423/04Homopolymers or copolymers of ethene
    • C08J2423/06Polyethene
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02Characterised 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
    • C08J2423/04Homopolymers or copolymers of ethene
    • C08J2423/08Copolymers of ethene

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Wrappers (AREA)

Abstract

The invention discloses an enhanced liquid packaging composite film, which is characterized in that: comprises an inner layer film, a middle layer film and an outer layer film; the components of the inner film comprise, in parts by weight, 25% lldpe1, 40% lldpe2, 30% lldpe3 and 5% functional aid; the components of the middle layer film comprise LLDPE, LDPE1 and LDPE2; the components of the outer layer film comprise LLDPE and LDPE; the thickness ratio of the outer layer film, the middle layer film and the inner layer film is 30%:45%:25 percent, the invention has the advantages that LLDPE3 in the inner layer film and LDPE1 in the middle layer film have synergistic effect, excellent heat sealing performance can be obtained, the sealing strength is greatly improved, meanwhile, the middle layer film and the outer layer film have better puncture resistance and processing performance in cooperation, and the outer layer film, the middle layer film and the inner layer film provide good structural strength and service performance for the strong liquid packaging composite film in a synergistic way.

Description

Enhanced liquid packaging composite film
Technical Field
The invention relates to a liquid film, in particular to an enhanced liquid packaging composite film.
Background
Plastic packages and plastic package products occupy more and more share in the market, and particularly, composite plastic flexible packages are widely applied to the fields of food, medicine, chemical industry and the like, wherein the proportion of the plastic packages is the largest. The liquid packaging film is a packaging film whose content is liquid, and has been widely used as a new mode of plastic flexible packaging. The liquid soft plastic packaging film adopts a Polyethylene (PE) co-extrusion film as a main film material, and the film material needs to meet the requirements of packaging, printing, processing, storage, transportation, sanitation and the like.
In the prior art, the structure of a composite film for a packaging bag generally comprises a protective layer, a barrier layer and a heat sealing layer, wherein the protective layer plays a role in protecting a printed pattern; the barrier layer is a functional layer and has the functions of air resistance, light shading and the like; the heat-sealing layer is used for heat-sealing, and a polyethylene film or a polypropylene film is usually used as a heat-sealing material. The packaging bag made of the composite film in the prior art has the problems of poor pressure resistance, easy breakage of the packaging bag caused by light falling and leakage of articles in the packaging bag.
In order to solve the technical problems, chinese patent document CN202072106U discloses a pressure-resistant packaging composite film, which structurally comprises a surface layer, a barrier layer and a heat-sealing layer, wherein an adhesive layer is arranged between the surface layer and the barrier layer, a reinforcing layer is arranged between the barrier layer and the heat-sealing layer, the barrier layer and the reinforcing layer, and the reinforcing layer and the heat-sealing layer are respectively provided with an adhesive layer, the surface layer adopts polyester, the barrier layer adopts aluminum foil, the reinforcing layer adopts polyester, and the heat-sealing layer adopts polyethylene. The pressure-resistant packaging composite film has the advantage that the external pressure resistance of the packaging composite film is improved due to the fact that the reinforcing layer is additionally arranged between the barrier layer and the heat sealing layer. However, in the above technology, polyethylene is used as the heat sealing layer of the packaging composite film, and because polyethylene has high hardness, high strength, and low flexibility and compressive strength, the falling resistance and compressive resistance at the sealing position of the packaging bag are still poor after heat sealing.
To address this problem, we have attempted to design a multilayer composite liquid packaging film that achieves enhanced liquid packaging film performance by separating the different functions required of the liquid packaging film into multiple layers of functionality that are complementary to each other.
Disclosure of Invention
The invention aims to: the invention aims to provide a reinforced liquid packaging composite film aiming at the defects of the prior art.
The technical scheme is as follows: the invention relates to an enhanced liquid packaging composite film, which comprises an inner layer film, a middle layer film and an outer layer film;
the components of the inner film comprise, in parts by weight, 25% lldpe1, 40% lldpe2, 30% lldpe3 and 5% functional aid;
the components of the middle layer film comprise LLDPE, LDPE1 and LDPE2;
the components of the outer layer film comprise LLDPE and LDPE;
the thickness ratio of the outer layer film, the middle layer film and the inner layer film is 30%:45%:25 percent.
Preferably, the components of the intermediate film comprise, in parts by weight, 30% LLDPE,60% LDPE1, 10% LDPE2.
Preferably, the components of the outer layer film comprise 40% by weight of LLDPE,60% by weight of LDPE.
Preferably, the functional auxiliary comprises an opening agent and a slipping agent.
Preferably, the functional auxiliary agent further comprises a stabilizer and an antibacterial agent.
Preferably, the stabilizer comprises one or a combination of zinc laurate, zinc oleate and zinc stearate.
Preferably, the antibacterial agent comprises one or more of glycerol monolaurate, glycerol monolaurate and methyl jasmonate.
Compared with the prior art, the invention has the following beneficial effects: LLDPE3 in the inner layer film and LDPE1 in the middle layer film play a synergistic effect, can obtain splendid heat sealability, greatly improved seal strength, and middle layer film and outer layer film cooperation possess better puncture resistance and processability simultaneously, and outer layer film, middle layer film and inner layer film cooperate and provide fine structural strength and performance for this strong type liquid packaging composite film.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.
In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication connection; either directly or indirectly through intervening media, either internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The technical means of the present invention will be described in detail with reference to specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
An enhanced liquid packaging composite film comprises an inner layer film, a middle layer film and an outer layer film;
the components of the inner film comprise, in parts by weight, 25% lldpe1, 40% lldpe2, 30% lldpe3 and 5% functional aid;
the components of the middle layer film comprise LLDPE, LDPE1 and LDPE2;
the components of the outer layer film comprise LLDPE and LDPE;
the thickness ratio of the outer layer film, the middle layer film and the inner layer film is 30%:45%:25 percent.
The technical scheme has the advantages that LLDPE3 in the inner layer film and LDPE1 in the middle layer film have a synergistic effect, excellent heat sealing performance can be obtained, the sealing strength is greatly improved, meanwhile, the middle layer film and the outer layer film have better puncture resistance and processing performance in a matched mode, and the outer layer film, the middle layer film and the inner layer film provide good structural strength and service performance for the strong liquid packaging composite film in a synergistic mode.
In particular practice, the composition of the middle layer film comprises 30% by weight of LLDPE,60% by weight of LDPE1, 10% by weight of LDPE2, and the composition of the outer layer film comprises 40% by weight of LLDPE,60% by weight of LDPE.
Wherein, LLDPE1, LLDPE2 and LLDPE3 refer to 1-melt-finger linear low-density polyethylene resin, 2-melt-finger linear low-density polyethylene resin and 3-melt-finger linear low-density polyethylene resin respectively, and LDPE1 and LDPE2 refer to 1-melt-finger low-density polyethylene and 2-melt-finger low-density polyethylene respectively.
In addition, the functional auxiliary agent comprises an opening agent, a slipping agent, a stabilizing agent and an antibacterial agent, specifically, the stabilizing agent comprises one or a combination of more of zinc laurate, zinc oleate and zinc stearate, and the antibacterial agent comprises one or a combination of more of triglycerol monolaurate, glycerol monolaurate and methyl jasmonate.
In effect, LLDPE3 in the inner film and LDPE1 in the middle film act: provides good heat sealing effect for the structure of the inner layer film, the LLDPE in the middle layer film and the LLDPE in the outer layer film: the anti-puncturing effect is achieved, and the LDPE in the outer layer film and the LDPE in the middle layer film achieve the effect of improving the processing.
Example (b): the reinforced liquid packaging composite film prepared by the technical scheme.
Comparative example: existing polyethylene liquid films.
The heat-seal effect and the puncture resistance effect of the comparative examples and comparative examples are shown in the following table:
heat sealing effect Anti-puncture effect
Examples 3.8N/15mm 260mm/min
Comparative example 2.2N/15mm 192mm/min
As can be seen from the above table, the heat sealability and puncture resistance are improved in a limited manner.
In the present invention, unless otherwise explicitly specified or limited, the first feature "on" or "under" the second feature may be directly contacting the first feature and the second feature or indirectly contacting the first feature and the second feature through an intermediate. Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that only the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lower level than the second feature. In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples," or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example.
Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. An enhanced liquid packaging composite film, comprising: comprises an inner layer film, a middle layer film and an outer layer film;
the components of the inner film comprise, in parts by weight, 25% lldpe1, 40% lldpe2, 30% lldpe3 and 5% functional aid;
the components of the middle layer film comprise LLDPE, LDPE1 and LDPE2;
the components of the outer layer film comprise LLDPE and LDPE;
the thickness ratio of the outer layer film, the middle layer film and the inner layer film is 30%:45%:25 percent.
2. A reinforced liquid packaging composite film according to claim 1, wherein: the composition of the intermediate film comprises, in parts by weight, 30% of LLDPE,60% of LDPE1, 10% of LDPE2.
3. A reinforced liquid packaging composite film according to claim 1, wherein: the components of the outer layer film comprise, in parts by weight, 40% LLDPE,60% LDPE.
4. A reinforced liquid packaging composite film according to claim 1, wherein: the functional auxiliary agent comprises an opening agent and a slipping agent.
5. A reinforced liquid packaging composite film according to claim 4, wherein: the functional auxiliary agent also comprises a stabilizer and an antibacterial agent.
6. A reinforced liquid packaging composite film according to claim 5, wherein: the stabilizer comprises one or more of zinc laurate, zinc oleate and zinc stearate.
7. A reinforced liquid packaging composite film according to claim 5, wherein: the antibacterial agent comprises one or more of triglycerol monolaurate, glycerol monolaurate and methyl jasmonate.
CN202211124563.2A 2022-09-15 2022-09-15 Enhanced liquid packaging composite film Pending CN115556449A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN202211124563.2A CN115556449A (en) 2022-09-15 2022-09-15 Enhanced liquid packaging composite film

Publications (1)

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CN115556449A true CN115556449A (en) 2023-01-03

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102423946A (en) * 2011-08-03 2012-04-25 大连方盛塑料有限公司 Food package plastic base material film and production technology thereof
CN107383520A (en) * 2017-06-26 2017-11-24 李春秀 PE liquid packaging films
CN108359170A (en) * 2018-02-26 2018-08-03 云南名博包装印刷有限公司 A kind of multi-layer co-extruded polyethylene film and preparation method thereof
CN108773137A (en) * 2018-06-25 2018-11-09 青岛东海包装产业有限公司 Automatically it is packed for polyethylene film and preparation method thereof
CN110466225A (en) * 2019-09-16 2019-11-19 福建立邦包装有限公司 A kind of CPE heat-sealing composite membrane and preparation method thereof
CN110733218A (en) * 2019-11-16 2020-01-31 青岛东海包装产业有限公司 polyethylene film with high puncture strength and preparation method thereof
CN110861376A (en) * 2019-12-02 2020-03-06 上海紫江彩印包装有限公司 Polyolefin film for transparent back plate film and preparation method thereof
CN110948974A (en) * 2019-10-31 2020-04-03 福建师范大学福清分校 High-low temperature antifogging breathable polyethylene heat-sealing film for fruit and vegetable packaging and preparation method thereof
CN111469512A (en) * 2020-04-14 2020-07-31 江阴申隆包装材料有限公司 Food is with repeated heat-seal film and repeated heat-seal packaging film thereof
CN113195229A (en) * 2019-02-28 2021-07-30 株式会社爱赛璐 Packaging film, film bag and manufacturing method thereof

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102423946A (en) * 2011-08-03 2012-04-25 大连方盛塑料有限公司 Food package plastic base material film and production technology thereof
CN107383520A (en) * 2017-06-26 2017-11-24 李春秀 PE liquid packaging films
CN108359170A (en) * 2018-02-26 2018-08-03 云南名博包装印刷有限公司 A kind of multi-layer co-extruded polyethylene film and preparation method thereof
CN108773137A (en) * 2018-06-25 2018-11-09 青岛东海包装产业有限公司 Automatically it is packed for polyethylene film and preparation method thereof
CN113195229A (en) * 2019-02-28 2021-07-30 株式会社爱赛璐 Packaging film, film bag and manufacturing method thereof
CN110466225A (en) * 2019-09-16 2019-11-19 福建立邦包装有限公司 A kind of CPE heat-sealing composite membrane and preparation method thereof
CN110948974A (en) * 2019-10-31 2020-04-03 福建师范大学福清分校 High-low temperature antifogging breathable polyethylene heat-sealing film for fruit and vegetable packaging and preparation method thereof
CN110733218A (en) * 2019-11-16 2020-01-31 青岛东海包装产业有限公司 polyethylene film with high puncture strength and preparation method thereof
CN110861376A (en) * 2019-12-02 2020-03-06 上海紫江彩印包装有限公司 Polyolefin film for transparent back plate film and preparation method thereof
CN111469512A (en) * 2020-04-14 2020-07-31 江阴申隆包装材料有限公司 Food is with repeated heat-seal film and repeated heat-seal packaging film thereof

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Address before: 213100 No. 21, West Taihu Avenue, Wujin economic development zone, Changzhou City, Jiangsu Province

Applicant before: CHANGZHOU QIGANG NEW MATERIAL Co.,Ltd.

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