CN209937925U

CN209937925U - BOPP double-sided heat-sealing film

Info

Publication number: CN209937925U
Application number: CN201920539969.4U
Authority: CN
Inventors: 薛鹏
Original assignee: FSPG Hi Tech Co Ltd
Current assignee: FSPG Hi Tech Co Ltd
Priority date: 2019-04-19
Filing date: 2019-04-19
Publication date: 2020-01-14
Anticipated expiration: 2029-04-19

Abstract

The utility model discloses a two-sided heat-seal film of BOPP, including sandwich layer 1 that the BOPP membrane was made, the sandwich layer both sides are provided with outer 3 that the PETG resin film was made, are provided with sublayer 2 that maleic anhydride grafting polypropylene bonding resin made between sandwich layer and skin. The utility model discloses use the PETG layer of wear-resisting flower as outer, the BOPP layer that mechanical properties is good is as the sandwich layer to, through set up the sublayer that has the bonding function between skin and sandwich layer, solved the easy defect that slides, peel off of BOPP membrane and PETG membrane, improve wear-resisting flower performance, the preparation technology of the two-sided heat-seal film of BOPP is succinct simultaneously, can extrude through unifying, violently vertically draw the technology preparation of membrane.

Description

BOPP double-sided heat-sealing film

Technical Field

The utility model relates to a polymer film technical field especially relates to a two-sided heat-seal film of BOPP.

Background

Along with the improvement of people's living standard and the reinforcing of environmental protection consciousness, the requirement to product package is higher and higher, both hopes beautifully, can the environmental protection again, to some packing fields, for example the barrel packing of cigarette, can enough pack up transparently, be difficult to grind flower, guarantee its aesthetic property, can remove barrel packing box again, play the environmental protection effect, to the application field of this type of demand, want to develop a novel BOPP heat-seal film that satisfies above demand. Most BOPP heat-seal film all possesses certain heat sealability as the top layer through setting up copolymerization PP at present, but because copolymerization PP surface hardness is lower, causes the wearing and tearing of film surface easily in packing and transportation, the mar appears, seriously influences the aesthetic property of packing, especially cigarette packing field, therefore a lot of BOPP manufacturing enterprises have all carried out the modified research in this aspect to there are relevant patent publications:

chinese patent CN206264524U discloses a wear-resistant high-brightness smoke film, which comprises a 3-layer structure: the middle layer is a homopolymerized polypropylene layer, the upper surface and the lower surface are copolymerized polypropylene layers, and the copolymerized polypropylene layers contain wear-resistant organic fillers with regular and irregular spheres so as to improve the wear resistance. Chinese patent CN106315009A discloses a flower-resistant cigarette film, which is a 3-layer structure: the film with the three-layer structure mainly increases the wear resistance of the surface layer by mixing the friction-resistant polyacrylate on the surface layer.

Chinese patent CN103252960B discloses a wear-resistant cigarette packaging film, which has a 3-layer structure: the middle layer BOPP thin film layer is provided with polyacrylate layers on the upper surface and the lower surface of the middle layer, the polyacrylate layers are provided with a plurality of pits filled with transparent UV curing coatings, and the middle layer and the polyacrylate layers are bonded through transparent glue. The cigarette packaging film is mainly provided with a friction-resistant polyacrylate layer to increase the friction resistance.

Chinese patent CN101362539B discloses a shrink type polyester film for cigarette packaging, which has a three-layer structure: the core layer formula mainly comprises PETG + PET slices, the upper surface layer formula and the lower surface layer formula mainly comprise PETG, and the three-layer structure is compounded through direct co-extrusion. The PETG film has good wear resistance, but the core layer of the PETG film is a film layer which takes PETG and PET slices as main formulas, and the core layer has poor stretchability during preparation, so that the process difficulty during production is higher, and the water vapor permeability resistance is insufficient.

SUMMERY OF THE UTILITY MODEL

The utility model provides a two-sided heat-seal film of BOPP has the advantage that is difficult for sliding, peels off, preparation technology is succinct between the advantage rete that resistant fish tail, mechanical properties are good.

BOPP two-sided heat-seal film, including the sandwich layer that the BOPP membrane was made, the sandwich layer both sides are provided with the skin that PETG resin film was made, are provided with the subsurface layer that maleic anhydride grafting polypropylene bonding resin made between sandwich layer and skin.

The utility model discloses following beneficial effect has:

the utility model discloses a two-sided heat-seal film of BOPP, through the outer PETG membrane that sets up wear-resisting flower and the good BOPP layer of mechanical properties, make the two-sided heat-seal film of BOPP have wear-resisting flower, advantage that mechanical properties is good, and, set up the sublayer that is made by maleic anhydride grafting polypropylene bonding resin between sandwich layer and skin, this sublayer not only can further promote wear-resisting flower performance, and firmly bond skin and sandwich layer, it slides easily with the PETG membrane to have solved BOPP membrane, the defect of peeling off, improve wear-resisting flower performance, the preparation technology of the two-sided heat-seal film of BOPP is succinct simultaneously, can extrude through the unity, transversely vertically draw the membrane preparation.

Drawings

FIG. 1: the BOPP double-sided heat-sealing film has a structural schematic diagram, wherein the label 1 is a core layer, the label 2 is a subsurface layer, and the label 3 is an outer layer.

Detailed Description

As shown in figure 1, the BOPP double-sided heat-sealing film comprises a core layer 1 made of a BOPP film, outer layers 3 made of PETG resin films are arranged on two sides of the core layer, and a subsurface layer 2 made of maleic anhydride grafted polypropylene bonding resin is arranged between the core layer and the outer layers. The BOPP double-sided heat-sealing film has the advantages of wear-resistant patterns and good mechanical property by arranging the outer PETG film of the wear-resistant patterns and the BOPP layer with good mechanical property. The subsurface layer made of the maleic anhydride grafted polypropylene bonding resin is arranged between the core layer and the outer layer, so that the wear-resistant flower property can be further improved, and the defects that a BOPP film and a PETG film are easy to slide and peel are overcome.

The main component of the maleic anhydride grafted polypropylene bonding resin is maleic anhydride grafted polypropylene, and the maleic anhydride grafted polypropylene bonding resin can be more than 80 percent of the total weight of the maleic anhydride grafted polypropylene bonding resin and can also be pure maleic anhydride grafted polypropylene.

And, owing to use maleic anhydride grafting polypropylene bonding resin layer to replace the transparent glue layer commonly used, make the utility model discloses a preparation technology of BOPP two-sided heat-seal film can once crowd altogether after becoming the thick film, violently again, vertically draw the membrane to make the two-sided heat-seal film product of BOPP. The preparation process is simple and low in process cost.

As a specific example, the thickness of each layer may be 0.3 microns for the outer layer, 0.3 microns for the subsurface layer, and 20 microns for the core layer. Another example is an outer layer of 1.2 microns, a subsurface layer of 0.6 microns, and a core layer of 20 microns.

The thickness of the subsurface layer is related to the adhesion and productivity between the BOPP film and the PETG film, and if the thickness of the subsurface layer is less than 0.3 μm, the peeling force between the BOPP film and the PETG film is insufficient, which may not be sufficient for most applications of BOPP double-sided heat-seal films. The main mechanical property of the BOPP double-sided heat-sealing film is provided by the core layer, so that the thickness of the subsurface layer is too high, the overall mechanical property of the BOPP double-sided heat-sealing film is influenced firstly, and the cost is high when the thickness is too high, and the production and adjustment are difficult during preparation.

Preferably, the subsurface layer has a thickness of 0.6 to 1.8 microns. The adhesion and scratch resistance are good at the preferred subsurface layer thickness.

The thickness of each layer of the BOPP double-sided heat-sealing film is designed symmetrically. The film with symmetrical design is convenient to use and produce.

Claims

1. A BOPP double-sided heat-sealing film comprises a core layer (1) made of a BOPP film, outer layers (3) made of PETG resin films are arranged on two sides of the core layer, and the BOPP double-sided heat-sealing film is characterized in that a subsurface layer (2) made of maleic anhydride grafted polypropylene bonding resin is arranged between the core layer and the outer layers.

2. The BOPP double-sided heat-seal film of claim 1, wherein the core layer has a thickness of 0.1 to 68.8 microns, the subsurface layer has a thickness of 0.3 to 3 microns, and the outer layer has a thickness of 0.3 to 3 microns.

3. The BOPP double-sided heat-sealable film of claim 2, wherein the subsurface layer has a thickness of 0.6 to 1.8 microns.

4. The BOPP double-sided heat-sealable film of claim 2, wherein the thickness of each layer of the BOPP double-sided heat-sealable film is of a symmetrical design.