CN204526330U - The laminating film of BOPP - Google Patents

Abstract

The utility model discloses the laminating film of a kind of BOPP, comprise at least three-decker, described at least three-decker comprises polypropylene based layers; Compound one deck PE layer in described polypropylene based layers, described polypropylene based layers and described PE layer are bonded together by the hot extrude mode of conjunction; Compound one deck PE and PP mixed layer below described polypropylene based layers; Described PE and PP mixed layer and described PE layer thickness are than being 1:1; Compound one deck corona layer above described PE layer.The film body slitter edge of laminating film of the present utility model is less, reduces production cost, simultaneously more existing laminating film, and its heat sealability is stronger, and film both can not cross soft also can not deflection too high, also there is electrostatic-proof function simultaneously.

Description

BOPP lamination film

technical field

The utility model relates to a film, in particular to a BOPP laminated film.

Background technique

Polyethylene (PE for short) is a thermoplastic resin obtained by polymerizing ethylene. Polypropylene English name: Polypropylene, abbreviation: PP, commonly known as: 100% glue. Polypropylene is a representative of poly-α-olefin, a thermoplastic resin prepared by polymerizing propylene, and its monomer is propylene CH2=CH-CH3. According to different initiators and polymerization processes, polypropylene can be divided into three configurations: isotactic polypropylene, atactic polypropylene and syndiotactic polypropylene. Isotactic polypropylene is easy to form a crystalline state, the crystallinity is as high as 95%, and the molecular weight is between 80,000 and 150,000, which endows him with good heat resistance and solvent resistance; atactic polypropylene is a non-crystalline, Microstrip viscous white wax, low molecular weight, 3000-10000, irregular structure, lack of cohesion, less application. BOPP film is a very important flexible packaging material. BOPP film is colorless, odorless, tasteless, non-toxic, and has high tensile strength, impact strength, rigidity, toughness and good transparency. The surface energy of BOPP film is low, and corona treatment is required before gluing or printing. After corona treatment, BOPP film has good printing adaptability, and can be overprinted to obtain exquisite appearance effects, so it is often used as the surface layer material of composite films. In the production process of the traditional lamination film, due to the large necking of PP, many waste edges are produced.

Utility model content

The utility model overcomes the shortcomings of the prior art and provides a BOPP laminated film with antistatic properties and uniform film thickness.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions:

A BOPP laminated film, comprising at least three-layer structure, the at least three-layer structure includes a polypropylene base layer; a layer of PE layer is compounded on the polypropylene base layer, and the polypropylene base layer and the PE layer are heat-extruded bonded together; the polypropylene base layer is compounded with a layer of PE and PP mixed layer; the thickness ratio of the PE and PP mixed layer to the PE layer is 1:1; the PE layer is compounded with a layer of electrical halo layer.

A further technical solution is that the polypropylene layer is provided with at least two-layer structure.

A further technical solution is that the three-layer structure is formed at one time by co-extrusion and biaxial stretching.

A further technical solution is to compound a layer of matting transfer layer on the corona layer.

A further technical solution is to compound a layer of heat-sealing layer on the corona layer; the extruded thickness of the heat-sealing layer is 1 to 10 microns.

A further technical solution is to coat the PE and PP mixed layer with a non-residual adhesive layer.

Compared with the prior art, the beneficial effect of the utility model is: the laminated film of the utility model has fewer waste edges of the film body, which reduces the production cost, and at the same time, compared with the existing laminated film, its heat sealing performance is Stronger, and the film is neither too soft nor too stiff, but also has anti-static function.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further elaborated.

As shown in Fig. 1, according to an embodiment of the present invention, the BOPP laminated film of this embodiment includes at least three-layer structure, and the three-layer structure is formed by co-extrusion biaxial stretching at one time. The at least three-layer structure includes a polypropylene base layer 4; preferably, the polypropylene layer should be provided with at least a two-layer structure. Specifically, in this embodiment, the selection range of the polypropylene layer is preferably 2 to 5 layer structures. Preferably, this In the embodiment, three layers of polypropylene are specifically selected, which not only ensures its thickness, but also does not cause excessive stiffness. A layer of PE layer 3 is compounded on the polypropylene base layer, and the polypropylene base layer and the PE layer are bonded together by thermal extrusion; a layer of PE and PP mixed layer 5 is compounded under the polypropylene base layer; The thickness ratio of the PE and PP mixed layer to the PE layer is 1:1; a corona layer 2 is compounded on the PE layer.

As a preferred embodiment, in this example, a layer of matting transfer layer 1 is preferably compounded on the corona layer. In order to achieve better heat sealing performance, according to another embodiment of the utility model, it is also possible to compound on the corona layer A heat-sealing layer; the extrusion thickness of the heat-sealing layer is 1 to 10 microns.

Further, the adhesive layer 6 without residual glue is coated under the mixed layer of PE and PP, so that the film is bonded stronger, and meanwhile, the adhesive layer without residual glue can be reused.

"One embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in the general description of this application In at least one embodiment of . The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure or characteristic is described in combination with any embodiment, it shall be claimed that realizing such feature, structure or characteristic in combination with other embodiments also falls within the scope of the present invention.

Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it is to be understood that numerous other modifications and implementations can be devised by those skilled in the art which will fall within the scope of the disclosure of this application. within the scope and spirit of the principles. More specifically, within the scope of the disclosure, drawings and claims of the present application, various modifications and improvements can be made to the components and/or layout of the subject combination layout. In addition to modifications and improvements in component parts and/or layout, other uses will be apparent to those skilled in the art.

Claims (6)

1. the laminating film of BOPP, comprises at least three-decker, and described at least three-decker comprises polypropylene based layers; It is characterized in that: compound one deck PE layer in described polypropylene based layers, described polypropylene based layers and described PE layer are bonded together by the hot extrude mode of conjunction; Compound one deck PE and PP mixed layer below described polypropylene based layers; Described PE and PP mixed layer and described PE layer thickness are than being 1:1; Compound one deck corona layer above described PE layer.

2. the laminating film of BOPP according to claim 1, is characterized in that described polypropylene layer is provided with at least double-layer structure.

3. the laminating film of BOPP according to claim 1, is characterized in that described three-decker is by coextrusion biaxial tension one-shot forming.

4. the laminating film of BOPP according to claim 1, is characterized in that compound one deck delustring transfer layer on described corona layer.

5. the laminating film of BOPP according to claim 1, is characterized in that compound one deck hot sealing layer on described corona layer; Described hot sealing layer is extruded thickness and is 1 to 10 micron.

6. the laminating film of BOPP according to claim 1, is characterized in that the adhesive layer being coated with not cull below described PE and PP mixed layer.