CN117644704A - Co-extrusion packaging material for hot filling and preparation method and application thereof - Google Patents

Co-extrusion packaging material for hot filling and preparation method and application thereof Download PDF

Info

Publication number
CN117644704A
CN117644704A CN202311397528.2A CN202311397528A CN117644704A CN 117644704 A CN117644704 A CN 117644704A CN 202311397528 A CN202311397528 A CN 202311397528A CN 117644704 A CN117644704 A CN 117644704A
Authority
CN
China
Prior art keywords
layer
packaging material
master batch
extruded
polyethylene
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
CN202311397528.2A
Other languages
Chinese (zh)
Inventor
谢文汇
汪学文
汪飞
徐舟
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.)
Huangshan Novel Co Ltd
Original Assignee
Huangshan Novel 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 Huangshan Novel Co Ltd filed Critical Huangshan Novel Co Ltd
Priority to CN202311397528.2A priority Critical patent/CN117644704A/en
Publication of CN117644704A publication Critical patent/CN117644704A/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
    • B32B27/32—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
    • B29C48/16—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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Wrappers (AREA)

Abstract

The invention relates to the field of food packaging, in particular to a co-extrusion packaging material for hot filling, a preparation method and application thereof. The co-extrusion packaging material is a co-extrusion film which is divided into seven layers from outside to inside: the first layer is a random copolymer polypropylene layer, the second layer is an adhesive resin layer, the third layer is a copolymer nylon layer, the fourth layer is an adhesive resin layer, the fifth layer is a copolymer nylon layer, the sixth layer is an adhesive resin layer, and the seventh layer is a polyethylene layer; the polyethylene layer consists of 55-65 wt% of metallocene linear polyethylene, 32-42 wt% of linear low density polyethylene and 2.6-3.7 wt% of additive master batch. The co-extrusion packaging material provided by the invention has stable packaging performance, better flatness and excellent heat resistance, and meets the requirement of drop performance. The co-extrusion packaging material can prevent the phenomenon that the hot filling falls and breaks bags in the heat sealing area after being cooled at normal temperature, and meets the packaging requirements of markets and clients.

Description

Co-extrusion packaging material for hot filling and preparation method and application thereof
Technical Field
The invention relates to the field of food packaging, in particular to a co-extrusion packaging material for hot filling, a preparation method and application thereof.
Background
The prepared food is a healthy, nutritional and quick food which is processed on the basis of not changing the physical characteristics of the original food materials through a modern process, is taken as a quick food with rapid crossing and various consumption demands, is convenient for the life of people to a great extent, avoids the complicated preparation process of cooking, and can be eaten after slightly heating or processing the prepared food by consumers. The production and processing modes of the prepared food are various, and the filling modes are also various. The hot filling is a high-temperature filling mode, and after the product is subjected to UHT instantaneous sterilization, the product is subjected to reflux and is filled through a discharge hole of a food storage tank at a constant temperature of 90-110 ℃. For such products using hot filling, the requirements on the packaging material are very high, which presents a high challenge in performance.
At present, a conventional high-temperature steaming bag is mainly used as a packaging material for high-temperature filling, and in the material structure of the conventional high-temperature steaming bag, common materials comprise biaxially oriented polyester film (BOPET), aluminum foil (Al), steaming-grade casting polypropylene film (CPP) and the like, and the packaging material has the advantages of high barrier property and steaming performance. However, when the high-temperature stewing packaging bag (with the structure BOPET/AL/RCPP) is applied to a food hot-filling project, the phenomenon that a heat-sealing area has folds after hot-filling normal-temperature cooling and the phenomenon that a hot-filling drop test has drop bag breaking occurs, and the conventional high-temperature stewing packaging bag structure is used as a packaging material, so that the market and the customer demands cannot be met.
The package material is provided, and under the premise of not changing the hot filling performance, the conditions of wrinkling of a heat sealing area, falling and bag breaking after hot filling and normal temperature cooling are completely eradicated, so that the package material is a technical problem to be solved.
Disclosure of Invention
In order to solve the problems in the prior art, it is an object of the present invention to provide a co-extruded packaging material for hot filling.
The invention adopts the technical scheme that:
a co-extruded packaging material for hot filling, the co-extruded packaging material being a co-extruded film having seven layers from the outside inwards: the first layer is a random copolymer polypropylene layer, the second layer is an adhesive resin layer, the third layer is a copolymer nylon layer, the fourth layer is an adhesive resin layer, the fifth layer is a copolymer nylon layer, the sixth layer is an adhesive resin layer, and the seventh layer is a polyethylene layer; the polyethylene layer consists of 55-65 wt% of metallocene linear polyethylene, 32-42 wt% of linear low density polyethylene and 2.6-3.7 wt% of additive master batch.
Preferably, the additive master batch comprises an opening master batch and a smooth master batch according to the mass ratio of 1:1 are matched to form the novel structure.
Preferably, the first layer uses 100wt% Nordic chemical grade RB707CF random copolymer polypropylene, the second layer uses Liandbarsel industry grade PX3838 binder resin, the third layer uses German Basil company grade C40L09 copolymer nylon, the fourth layer uses Liandbarsel industry grade PX3747 binder resin, the fifth layer uses Germany Basil company grade C40L09 copolymer nylon, and the sixth layer uses Liandbarsel industry grade PX3747 binder resin; in the seventh layer, the metallocene linear polyethylene is SP3210 polyethylene of Mitsui chemical brand, and the linear low density polyethylene is 2038.68G polyethylene of Dow chemical brand.
Preferably, the opening master batch is an EAZ-10 opening master batch with a Sanjing chemical brand, and the smooth master batch is a 10090-K smooth master batch with an installation color brand.
Preferably, the mass ratio of the metallocene linear polyethylene to the linear low density polyethylene to the opening master batch to the smooth master batch is 60:37:1.5:1.5.
Preferably, the total thickness of the co-extrusion film is 100-120 mu m, and the thickness ratio of the first layer to the seventh layer is (23-27), 7-9, 13-17, 6-8, 13-17, 7-9 and 30-34.
Preferably, the total thickness of the co-extrusion film is 110 μm, and the thicknesses of the first layer to the seventh layer are 25 μm, 8 μm, 15 μm, 7 μm, 15 μm, 8 μm, 32 μm, respectively.
Another object of the present invention is to provide a method for producing the above-mentioned co-extruded packaging material for hot filling, comprising the steps of:
s1, respectively preparing raw materials of a first layer to a seventh layer of the co-extrusion packaging material according to a proportion, then putting the raw materials into a mixer for uniform mixing, and respectively feeding the raw materials into an extruder for melting;
s2, performing coextrusion film blowing by using an extruder according to the arrangement sequence of the first layer to the seventh layer, and performing steps of inflation traction, clamp plate bubble formation, corona treatment, trimming and film rolling to obtain the required coextrusion packaging material.
Preferably, the inflation ratio of the inflation traction is 2.
The invention also provides an application of the co-extrusion packaging material for hot filling in preparing packaging materials of hot-filled products.
The present invention also provides a packaging material for a hot-filled product using a co-extruded packaging material for hot-filling according to any one of claims 1 to 6.
The invention has the beneficial effects that:
the product using the hot filling process has very high requirements on packaging materials, and the conventional high-temperature steaming bag is used as the packaging materials, so that the phenomenon that the hot filling falls off and breaks bags in a heat sealing area after being cooled at normal temperature can not meet the market and customer requirements.
The co-extrusion packaging material provided by the invention has a seven-layer structure, the first layer (outer layer) is a polypropylene layer, the random copolymer polypropylene RB707CF in Nordic industry is used, the RB707CF is random copolymer polypropylene resin in Nordic industry by North Star polymerization technology, and the co-extrusion packaging material has excellent heat resistance, high stiffness property and processability, good mechanical property and can realize film blowing process production.
The second layer is an adhesive resin layer, and PX3838 of Liande Basel industry company are used as adhesive layers, and meanwhile, the adhesive resin layer has excellent adhesive bonding performance with polypropylene and copolymerized nylon. In the binding resin, the maleic anhydride monomer forms functional branches on the backbone of the polypropylene, which can react rapidly and efficiently with the polar resin to form covalent and hydrogen bonds, bonding the polar and non-polar polymers together.
The third layer and the fifth layer are both copolymerized nylon layers, the thickness of the nylon layers has great influence on the mechanical property and the anti-falling property of the packaging material, and when the thickness is too thin, the physical and mechanical properties of the film are not ideal; when the thickness is too thick, the performance is better, but the nylon resin consumption is increased, and the cost is higher. The copolymer nylon disclosed by the invention uses C40L09 produced by Basoff corporation of Germany, has the advantages and characteristics of high oxygen resistance, good moisture resistance, good fragrance retention, strong mechanical property, high drop resistance, puncture resistance, good tear resistance and the like, and can balance the thickness and the mechanical property.
The fourth layer and the sixth layer are all adhesive resin layers, and the adhesive bonding performance between two layers of nylon can be provided by using PX3747 and PX3747 of Lian Debarsel industry company as adhesive layers. In the binding resin, functional branches formed by maleic anhydride monomers on the main chain of polyethylene can quickly react with polar resin to form covalent bonds and hydrogen bonds, so that the polar polymer and the nonpolar polymer are bonded together.
The seventh layer is a modified polyethylene layer and consists of special metallocene linear polyethylene, linear low-density polyethylene, additive opening master batch and smooth master batch.
The metallocene linear polyethylene adopts Mitsui chemical SP3210, and the film can obtain rigidity, heat resistance and impact strength simultaneously by adding the brand, and has good balance of heat resistance, high rigidity and high impact strength. The linear low-density polyethylene uses the Dow chemical 2038.68G, has good mechanical strength, excellent heat sealing strength and excellent processability, and has good processability after being blended with SP3210, so that the film has heat resistance, high rigidity and high impact strength and also has excellent anti-pollution performance and heat sealing performance.
The co-extrusion packaging material provided by the invention is used for hot filling, has stable packaging performance and good smoothness, and has excellent heat resistance during hot filling, thereby meeting the requirement of falling performance. The co-extrusion packaging material can prevent the phenomenon that the hot filling falls off and breaks bags in a heat sealing area after being cooled at normal temperature, solves the performance requirement of the food hot filling on the packaging material, and meets the packaging requirements of markets and clients.
Drawings
Fig. 1 is a schematic structural view of a co-extruded packaging material for hot filling according to the present invention.
The meaning of the reference symbols in the figures is as follows:
a-first layer B-second layer C-third layer D-fourth layer
E-fifth layer F-sixth layer G-seventh layer
Detailed Description
The technical scheme of the present invention is described below in conjunction with the drawings and embodiments of the specification so as to be understood by those skilled in the art.
As shown in fig. 1, a co-extruded packaging material for hot filling is a co-extruded film with seven layers from outside to inside:
the first layer A is a random copolymer polypropylene layer and consists of 100wt% Nordic chemical grade RB707CF random copolymer polypropylene; the second layer B is an adhesive resin layer and consists of 100wt% of PX3838 adhesive resin of Liandbarsel industrial company; the third layer C is a copolymerized nylon layer and consists of 100wt% of copolymerized nylon with the brand number of C40L09 of Basoff company, germany; the fourth layer D is an adhesive resin layer and consists of 100wt% of PX3747 adhesive resin of Liandbarsel industrial company; the fifth layer E is a copolymerized nylon layer and consists of 100wt% of copolymerized nylon with the brand of C40L09 of Basoff company, germany; the sixth layer F is an adhesive resin layer and consists of 100wt% of adhesive resin PX3747 of Liandbarsel industry company; the seventh layer G is a polyethylene layer and consists of 55-65 wt% of metallocene linear polyethylene, 32-42 wt% of linear low-density polyethylene and 2.6-3.7 wt% of additive master batch, wherein the metallocene linear polyethylene is three-well chemical grade SP3210 polyethylene, and the linear low-density polyethylene is Dow chemical grade 2038.68G polyethylene; the additive master batch comprises an opening master batch and a smooth master batch according to the mass ratio of 1:1, wherein the opening master batch is an EAZ-10 opening master batch with a three-well chemical brand, and the smooth master batch is a 10090-K smooth master batch with an installation color brand.
The preferable mass ratio of the metallocene linear polyethylene, the linear low density polyethylene, the opening master batch and the smooth master batch is 60:37:1.5:1.5.
As shown in Table 1, the total thickness of the co-extruded film is 100-120 μm, and the thickness ratio of the first layer A to the seventh layer G is (23-27): (7-9): (13-17): (6-8): (13-17): (7-9): (30-34).
Table 1 co-extruded packaging material formulation for hot filling
The preparation method of the co-extrusion packaging material comprises the following steps:
s1, respectively preparing raw materials of a first layer to a seventh layer of the co-extrusion packaging material according to a proportion, then putting the raw materials into a mixer for uniform mixing, and respectively feeding the raw materials into an extruder for melting;
s2, performing coextrusion blow molding by using an extruder according to the arrangement sequence of the first layer to the seventh layer, wherein the blow ratio is 2.0, and performing steps of blow drawing, splint bubble extinguishing, corona treatment, edge cutting and film winding to obtain the required coextrusion packaging material.
The production and preparation of the product were carried out with seven-layer coextrusion blow molding apparatus of the type VaREX, manufactured by W & H, germany, three groups of which are designated as examples 1 to 3, respectively, as shown in Table 2.
Table 2 comparison of the raw material formulations for each layer of examples 1-3
Comparative example:
the material of the conventional high-temperature stewing packaging bag is adopted as comparison, and the packaging bag is formed by compounding three layers of biaxially oriented polyester film (BOPET), aluminum foil (Al) and stewing-grade casting polypropylene film (CPP), wherein the material structure is 12 mu m BOPET/7 mu m AL/80 mu m CPP. After compositing BOPET with a thickness of 12 μm and AL (aluminum foil) with a thickness of 7 μm, the BOPET with a thickness of 80 μm was subjected to second layer compositing to obtain a composite film. The composite films were subjected to performance testing, as shown in Table 3, in comparison with the performance testing results performed in examples 1 to 3 of the present invention.
Table 3 technical indices of examples 1-3 and comparative examples
As shown by the test results of the table, the coextrusion packaging material for hot filling, which is produced by adopting the preparation process, realizes the innovative application of the food hot filling packaging material by adopting the special functional formula design scheme, and the processing process and the production technology of multilayer coextrusion, can ensure the stable performance of the package on the premise of ensuring the unchanged hot filling performance, has better flatness of the packaging material, has excellent heat resistance during hot filling, meets the requirement of falling performance, avoids the phenomenon of wrinkling of a heat sealing area and falling and bag breaking during hot filling after cooling at normal temperature, solves the performance requirement of the food hot filling on the packaging material, and meets the packaging requirements of markets and clients.
The above is merely a preferred embodiment of the present invention and is not intended to limit the present invention; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A co-extruded packaging material for hot filling, the co-extruded packaging material being a co-extruded film, characterized in that the co-extruded film is divided into seven layers from the outside to the inside: the first layer is a random copolymer polypropylene layer, the second layer is an adhesive resin layer, the third layer is a copolymer nylon layer, the fourth layer is an adhesive resin layer, the fifth layer is a copolymer nylon layer, the sixth layer is an adhesive resin layer, and the seventh layer is a polyethylene layer; the polyethylene layer consists of 55-65 wt% of metallocene linear polyethylene, 32-42 wt% of linear low density polyethylene and 2.6-3.7 wt% of additive master batch.
2. The co-extruded packaging material for hot filling according to claim 1, wherein the additive master batch is formed by matching an opening master batch and a smooth master batch according to a mass ratio of 1:1.
3. A co-extruded packaging material for hot filling according to claim 1, wherein the first layer uses 100wt% of northern european chemical grade RB707CF random copolymer polypropylene, the second layer uses the liaidebarsel industrial grade PX3838 binder resin, the third layer uses the german bassel industrial grade C40L09 copolymer nylon, the fourth layer uses the liaidebarsel industrial grade PX3747 binder resin, the fifth layer uses the german bassel industrial grade C40L09 copolymer nylon, and the sixth layer uses the liaidebarsel industrial grade PX3747 binder resin; in the seventh layer, the metallocene linear polyethylene is SP3210 polyethylene of Mitsui chemical brand, and the linear low density polyethylene is 2038.68G polyethylene of Dow chemical brand.
4. A co-extruded packaging material for hot filling according to claim 2, wherein the open master batch is a three-well chemical grade EAZ-10 open master batch and the smooth master batch is an installation color grade 10090-K smooth master batch.
5. A co-extruded packaging material for hot filling according to claim 2, wherein the mass ratio of metallocene linear polyethylene, linear low density polyethylene, open master batch and smooth master batch is 60:37:1.5:1.5.
6. A co-extruded packaging material for hot filling according to claim 2, wherein the total thickness of the co-extruded film is 100-120 μm, and the thickness ratio of the first layer to the seventh layer is (23-27): (7-9): (13-17): (6-8): (13-17): (7-9): (30-34).
7. A co-extruded packaging material for hot filling according to claim 2, wherein the total thickness of the co-extruded film is 110 μm and the thicknesses of the first to seventh layers are 25 μm, 8 μm, 15 μm, 7 μm, 15 μm, 8 μm, 32 μm, respectively.
8. A method of producing a co-extruded packaging material for hot filling according to any one of claims 1-7, characterized by the steps of:
s1, respectively preparing raw materials of a first layer to a seventh layer of the co-extrusion packaging material according to a proportion, then putting the raw materials into a mixer for uniform mixing, and respectively feeding the raw materials into an extruder for melting;
s2, performing coextrusion film blowing by using an extruder according to the arrangement sequence of the first layer to the seventh layer, and performing steps of inflation traction, clamp plate bubble formation, corona treatment, trimming and film rolling to obtain a required coextrusion packaging material; the inflation ratio of the inflation traction is 2.
9. Use of a co-extruded packaging material for hot-filling according to any of claims 1-7 for the preparation of a packaging material for hot-filled products.
10. Packaging material for hot-filled products, characterized in that the packaging material uses a co-extruded packaging material for hot-filling according to any of claims 1-7.
CN202311397528.2A 2023-10-26 2023-10-26 Co-extrusion packaging material for hot filling and preparation method and application thereof Pending CN117644704A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311397528.2A CN117644704A (en) 2023-10-26 2023-10-26 Co-extrusion packaging material for hot filling and preparation method and application thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311397528.2A CN117644704A (en) 2023-10-26 2023-10-26 Co-extrusion packaging material for hot filling and preparation method and application thereof

Publications (1)

Publication Number Publication Date
CN117644704A true CN117644704A (en) 2024-03-05

Family

ID=90042336

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311397528.2A Pending CN117644704A (en) 2023-10-26 2023-10-26 Co-extrusion packaging material for hot filling and preparation method and application thereof

Country Status (1)

Country Link
CN (1) CN117644704A (en)

Similar Documents

Publication Publication Date Title
TWI757456B (en) Polyethylene laminates for use in flexible packaging materials
US7651779B2 (en) Resin composition having easy-openable property
JP5755240B2 (en) Polyolefin composite film
US20110039098A1 (en) Gas-barrier films and sheets
US6391411B1 (en) Machine direction oriented high molecular weight, high density polyethylene films with enhanced water vapor transmission properties
CN113195217B (en) Laminated structure and flexible packaging material incorporating same
WO2011083707A1 (en) Heat-shrinkable multi-layer film for deep-draw forming, and process for production thereof
TW202026148A (en) Laminate structures and flexible packaging materials incorporating same
JP2018167867A (en) Food packaging film and food package
CN1894095A (en) Lamination adhesion of foil to thermoplastic polymers
EP3072686B1 (en) Multi-layer polymeric films
JP2007045048A (en) Polypropylene composite non-stretched film
JP2007237641A (en) Laminated polypropylene non-stretched film
WO2008153980A1 (en) Evoh blend providing improved oxygen resistance
JP7395317B2 (en) laminate
TWI795471B (en) Polyolefin based films with matte surface and improved sealing performance
JPH0241246A (en) Resin laminate
CN117644704A (en) Co-extrusion packaging material for hot filling and preparation method and application thereof
WO2022065379A1 (en) Stretched multilayer film and packaging bag formed of same
WO2016039275A1 (en) Biaxially oriented ethylene polymer film and packaging
JP4651993B2 (en) Easy-cut laminated film
JP2004250464A (en) Polyethylene film, its laminated film, and their use
WO2023210213A1 (en) Thermally shrinkable multilayer film and method for producing same
JP3798257B2 (en) Laminated film
JP2023514478A (en) Barrier laminate film for lap seal

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