CN-121991392-A - PET barrier film material and preparation method thereof

Abstract

The application discloses a barrier film material, which comprises a base film layer, an undercoat layer and a barrier layer, wherein the base film layer forms two surfaces which are oppositely arranged in the thickness direction, the undercoat layer is positioned on one side of the base film layer and is attached to the surface of the base film layer, the barrier layer is positioned on one side of the undercoat layer away from the base film layer and is attached to the undercoat layer, the barrier layer comprises a polymer matrix and a nano filler, and the nano filler comprises at least two of a zero-dimensional nano filler, a one-dimensional nano filler, a two-dimensional nano filler or a three-dimensional nano filler and must comprise a two-dimensional nano filler. The application also discloses a preparation method of the barrier film material. According to the application, the barrier layer filled with various fillers with different dimensions including the two-dimensional nano filler is arranged in the barrier film material, and the labyrinth three-dimensional barrier network is constructed on the barrier film material by mutually and cooperatively matching the fillers with various dimensions, so that the water-oxygen barrier property of the barrier film material is improved.

Inventors

• ZHOU LIUFANG
• LIU ZIAO
• JIANG PENG
• LI NANNAN
• SU HANG
• Dai Mengzheng
• LIN WEIHONG
• ZHOU GUANGDA

Assignees

• 浙江福斯特新材料研究院有限公司

Dates

Publication Date

20260508

Application Date

20260311

Claims (10)

1. 1. A barrier film material, comprising: the base film layer is provided with two surfaces which are oppositely arranged in the thickness direction; a primer layer located on one side of the base film layer and attached to the surface of the base film layer; A barrier layer on a side of the primer layer remote from the base film layer and attached to the primer layer, the barrier layer comprising a polymer matrix and a nanofiller comprising at least two of a zero-dimensional nanofiller, a one-dimensional nanofiller, a two-dimensional nanofiller, or a three-dimensional nanofiller and necessarily comprising a two-dimensional nanofiller.
2. 2. The barrier film material according to claim 1, wherein: The size range of the zero-dimensional nano filler is 30nm to 50nm, the size range of the one-dimensional nano filler is 50nm to 60nm, the size range of the two-dimensional nano filler is 60nm to 80nm, the specific surface area of the two-dimensional nano filler is 500m 2 /g to 1500m 2 /g, the size range of the three-dimensional nano filler is 80nm to 100nm, and the specific surface area of the three-dimensional material is 500m 2 /g to 1500m 2 /g; in the nanofiller, the size of the high-dimensional nanofiller is larger than the size of the low-dimensional nanofiller.
3. 3. The barrier film material according to claim 1, wherein: when the nanofiller includes two dimensions of the nanofiller, the weight of the two-dimensional nanofiller ranges from 50% to 60% by weight of the nanofiller, and/or, When the nanofiller includes three dimensions of the nanofiller, the weight of the two-dimensional nanofiller ranges from 30% to 50% by weight of the nanofiller, and/or, When the nanofiller includes four dimensions of the nanofiller, the weight of the two-dimensional nanofiller ranges from 20% to 30% by weight of the nanofiller.
4. 4. The barrier film material according to claim 1, wherein: The zero-dimensional nano filler comprises at least one of carbon quantum dots, graphene quantum dots, gold nanoparticles, silver nanoparticles, silicon dioxide nanoparticles, titanium dioxide nanoparticles or zinc oxide nanoparticles, and/or, The one-dimensional nano filler comprises at least one of carbon nano tube, silver nano wire, gold nano rod or nano fiber, and/or, The two-dimensional nano filler comprises at least one of graphene, molybdenum disulfide, tungsten disulfide, hexagonal boron nitride, black scale or layered double hydroxide, and/or, The three-dimensional nanofiller includes at least one of an aerogel or a molecular sieve.
5. 5. The barrier film material according to claim 1, wherein: the base film layer is formed with a micrometer-sized textured structure on at least the surface of the base coat layer.
6. 6. The barrier film material according to claim 1, wherein: The depth of the concave portion in the relief structure is in the range of 5 μm to 10 μm, and the height of the convex portion in the relief structure is in the range of 5 μm to 10 μm.
7. 7. The barrier film material according to claim 1, wherein: the thickness of the base film layer ranges from 200 μm to 300 μm, the thickness of the primer layer ranges from 500nm to 1000nm, and the thickness of the barrier layer ranges from 300nm to 1000nm.
8. 8. The barrier film material according to claim 1, wherein: The raw materials for preparing the primer layer comprise 10 to 15 weight parts of matrix resin, 3 to 5 weight parts of curing agent and 0.1 to 1 weight part of auxiliary agent, and/or, The preparation raw materials of the barrier layer comprise 20 to 30 weight parts of polymer matrix, 4 to 8 weight parts of nano filler and 1 to 2 weight parts of barrier layer auxiliary agent; preferably, the matrix resin comprises one of an aqueous polyurethane dispersion, an aqueous acrylic dispersion, a polyurethane-acrylic hybrid dispersion or an acrylic modified polyurethane, the curing agent comprises at least one of a hydrophilically modified aliphatic aqueous polyisocyanate, an aziridine-based crosslinking agent, a carbodiimide-based crosslinking agent or an oxazoline-based crosslinking agent, the auxiliary comprises a leveling agent, a pH adjustor and an undercoat auxiliary, the leveling agent comprises at least one of an organosilicon-based leveling agent, an acrylic-based leveling agent or a fluorocarbon surfactant, the pH adjustor comprises at least one of an inorganic base-based adjustment agent or an organic amine-based adjustment agent, the undercoat auxiliary comprises one of a silica sol or a polystyrene of a core-shell structure, the polymer matrix comprises one of an aqueous polyurethane, a polyvinyl alcohol, a polyimide or an acrylic emulsion, and the barrier auxiliary comprises a silane coupling agent.
9. 9. A method for producing the barrier film according to any one of claims 1 to 8, comprising the steps of: preparing the bottom coating slurry, namely mixing the preparation raw materials of the bottom coating with a diluent and uniformly stirring to prepare the bottom coating slurry; preparing the slurry of the barrier layer, mixing the preparation raw materials of the bottom coating with a diluent, and uniformly stirring to prepare the slurry of the bottom coating; And (3) preparing a film material, namely coating the base coat slurry on the base film layer to form the base coat, and coating the barrier layer slurry on the side, away from the base film layer, of the base coat to form the barrier layer.
10. 10. The method of manufacturing according to claim 9, wherein: In the preparation process of the barrier layer raw material, the addition sequence of the nanofillers is that the high-dimensional nanofillers are added first and then the low-dimensional nanofillers are added, and after the high-dimensional nanofillers are uniformly mixed with other components, the next low-dimensional nanofillers are added and uniformly mixed.

Description

PET barrier film material and preparation method thereof Technical Field The application relates to the technical field of film materials, in particular to a PET barrier film material and a preparation method thereof. Background PET itself has many advantages such as transparency, robustness, recyclability, and low cost, but its water vapor barrier and oxygen barrier properties are only at a moderate level, and cannot meet the needs of the industries of high-end food packaging, flexible electronics, pharmaceutical packaging, OLED display, and the like. Therefore, how to improve the water-oxygen barrier effect of the PET film material is a technical problem to be solved in the art. Disclosure of Invention In order to solve the technical problems, the application provides a barrier film material with good water vapor and oxygen barrier effect. In order to achieve the above purpose, the technical scheme adopted by the application is as follows: An aspect of an embodiment of the present application provides a barrier film material, which includes a base film layer, an undercoat layer and a barrier layer, the base film layer forms two opposite surfaces in a thickness direction, the undercoat layer is located at one side of the base film layer and is attached to the surface of the base film layer, the barrier layer is located at one side of the undercoat layer away from the base film layer and is attached to the undercoat layer, the barrier layer includes a polymer matrix and a nanofiller, and the nanofiller includes at least two of a zero-dimensional nanofiller, a one-dimensional nanofiller, a two-dimensional nanofiller, or a three-dimensional nanofiller and must include a two-dimensional nanofiller. Further, the size of the zero-dimensional nano filler is in the range of 30nm to 50nm, the size of the one-dimensional nano filler is in the range of 50nm to 60nm, the size of the two-dimensional nano filler is in the range of 60nm to 80nm, the specific surface area of the two-dimensional nano filler is in the range of 500m 2/g to 1500m 2/g, the size of the three-dimensional nano filler is in the range of 80nm to 100nm, the specific surface area of the three-dimensional material is in the range of 500m 2/g to 1500m 2/g, and the size of the high-dimensional nano filler is larger than that of the low-dimensional nano filler in the nano filler. Further, when the nanofiller includes two dimensions of the nanofiller, the weight of the two-dimensional nanofiller ranges from 50% to 60% by weight of the nanofiller. Further, when three dimensions of nanofiller are included in the nanofiller, the weight of the two-dimensional nanofiller ranges from 30% to 50% by weight of the nanofiller. Further, when four dimensions of nanofiller are included in the nanofiller, the weight of the two-dimensional nanofiller ranges from 20% to 30% by weight of the nanofiller. Further, the zero-dimensional nanofiller comprises at least one of carbon quantum dots, graphene quantum dots, gold nanoparticles, silver nanoparticles, silica nanoparticles, titanium dioxide nanoparticles, or zinc oxide nanoparticles. Further, the one-dimensional nanofiller includes at least one of carbon nanotubes, silver nanowires, gold nanorods, or nanofibers. Further, the two-dimensional nanofiller includes at least one of graphene, molybdenum disulfide, tungsten disulfide, hexagonal boron nitride, black scale, or layered double hydroxide. Further, the three-dimensional nanofiller includes at least one of an aerogel or a molecular sieve. Further, the base film layer has a micrometer-sized textured structure formed on at least the surface of the base layer. Further, the depth of the concave portion in the relief structure is in the range of 5 μm to 10 μm, and the height of the convex portion in the relief structure is in the range of 5 μm to 10 μm. Further, the base film layer has a thickness ranging from 200 μm to 300 μm, the undercoat layer has a thickness ranging from 500nm to 1000nm, and the barrier layer has a thickness ranging from 300nm to 1000nm. Further, the raw materials for preparing the primer layer comprise 10 to 15 parts by weight of matrix resin, 3 to 5 parts by weight of curing agent and 0.1 to 1 part by weight of auxiliary agent. Still further, the auxiliary comprises 0.1 to 0.15 parts by weight of a leveling agent, 0.15 to 0.2 parts by weight of a pH adjustor, and 0.5 to 0.65 parts by weight of an undercoat auxiliary. Further, the preparation raw materials of the barrier layer comprise 20 to 30 parts by weight of polymer matrix, 4 to 8 parts by weight of nano-filler and 1 to 2 parts by weight of barrier layer auxiliary agent. Further, the matrix resin comprises one of an aqueous polyurethane dispersion, an aqueous acrylic dispersion, a polyurethane-acrylic hybrid dispersion, or an acrylic modified polyurethane. Further, the curing agent comprises at least one of a hydrophilically modified aliphatic aqueous polyisocyanate, an aziridine-based crosslinki