CN212636837U

CN212636837U - Composite film of EVA (ethylene vinyl acetate) film and PET (polyethylene terephthalate) film

Info

Publication number: CN212636837U
Application number: CN202021131282.6U
Authority: CN
Inventors: 方俸君; 张增强; 钟新群; 曹琪军
Original assignee: Yiwu Kangshun Packaging Material Co ltd
Current assignee: Yiwu Kangshun Packaging Material Co ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-03-02
Anticipated expiration: 2030-06-18

Abstract

The utility model discloses a complex film of EVA film and PET film, including upper epidermis and EVA film, the upper end at the EVA film is installed to the upper epidermis, through third bond line fixed connection between upper epidermis and the EVA film, when carrying out work, the EVA film of complex film structure is also called environmental protection film, extrude the produced film through the curtain coating by the EVA raw materials, be a new generation green degradable material, but have biodegradable, can not cause the injury to the environment when abandonment or burning, and the structural PET film of complex film is the more comprehensive packing film of a performance ratio, its transparency is good, it is glossy, good gas tightness and fragrance conservation have, and, mechanical properties is good, compound EVA film and PET film through the bond line, and on EVA film and PET film, it has wear-resisting polyester film to make to bond respectively on, The lower-layer surface film greatly increases the wear resistance of the upper surface of the composite film through the effect of the wear-resistant upper and lower-layer surface films.

Description

Composite film of EVA (ethylene vinyl acetate) film and PET (polyethylene terephthalate) film

Technical Field

The utility model belongs to the technical field of the complex film is relevant, concretely relates to EVA film and PET film's complex film.

Background

The composite film is a high molecular material compounded by two or more layers of films made of different materials, is mainly used for packaging, and can obtain materials with comprehensive properties of single materials through compounding, and used base materials mainly comprise plastic films (such as Polyethylene (PE), polypropylene (PP), polystyrene, polyvinyl chloride (PVC), Polyester (PET) and the like), cellophane, paper, metal foil (AL) and the like. The substrate can be compounded by adopting an extrusion compounding method or by means of an adhesive.

The prior composite membrane technology has the following problems: the existing composite membrane has certain defects in the application of actual life and work, although the existing composite membrane has the characteristics of permeability resistance, ductility and the like, the existing composite membrane has certain defects in the aspects of the green environmental protection field, high transparency, thermoplasticity, cold resistance and the like, the requirement in production work cannot be well met, and the practical performance is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a complex film of EVA film and PET film to solve the current complex film that proposes in the above-mentioned background art and though have characteristics such as permeability resistance, ductility, nevertheless still there is certain not enough in aspects such as green field, high transparency, thermoplasticity and cold resistance, needs in satisfying the production work that can not be fine, the lower problem of practicality.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a complex film of EVA film and PET film, includes upper epidermis and EVA film, the upper end at the EVA film is installed to the upper epidermis, through third bond line fixed connection between upper epidermis and the EVA film, be provided with the PET film under the EVA film, through second bond line fixed connection between PET film and the EVA film, be provided with the lower floor's epidermis under the PET film, through first bond line fixed connection between lower floor's epidermis and the PET film.

Preferably, the upper surface film is made of wear-resistant polyester film.

Preferably, the materials of the first adhesive layer, the second adhesive layer and the third adhesive layer are all adhesives.

Preferably, the lower surface film, the first adhesive layer, the PET film, the second adhesive layer, the EVA film, the third adhesive layer and the upper surface film together form a composite film structure.

Preferably, the lower surface film is made of abrasion-resistant polyester film.

Preferably, the thicknesses of the upper surface film and the lower surface film are equal, and the thicknesses of the upper surface film and the lower surface film are both five to ten micrometers.

Compared with the prior art, the utility model provides a compound film of EVA film and PET film possesses following beneficial effect:

the utility model relates to a composite film of EVA film and PET film, which is improved and innovated on the basis of the existing composite film, so that the composite film has good practical performance in the application of actual production work, and the composite film of EVA film and PET film mainly comprises a composite film structure, a lower surface film, a first bonding layer, a PET film, a second bonding layer, an EVA film, a third bonding layer, an upper surface film and other structures, when the composite film of EVA film and PET film is used for working, the EVA film on the composite film structure is also called environmental protection film, is a film produced by EVA raw material extrusion through flow casting, is a new generation green environmental protection degradable material, has biodegradability, can not cause harm to the environment when abandoning or burning, is tasteless, does not contain heavy metal, does not contain phthalate, the PET film on the composite film structure is a packaging film with more comprehensive performance, has good transparency, luster, good air tightness and aroma retention, has the characteristics of better tensile strength and impact strength than common films, excellent heat resistance, cold resistance, good chemical resistance, oil resistance and the like, is compounded with the EVA film and the PET film through the bonding layer to ensure that the comprehensive properties are more comprehensive and excellent, and the upper layer surface film and the lower layer surface film made of abrasion-resistant polyester films are respectively bonded on the EVA film and the PET film, so the abrasion resistance of the upper surface of the composite film is greatly improved through the function of the abrasion-resistant upper layer surface film and the abrasion-resistant lower layer surface film, the comprehensive quality of the compound die is improved.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description, do not constitute a limitation of the invention, in which:

fig. 1 is a schematic view of an internal three-dimensional structure of a composite film of an EVA film and a PET film provided by the present invention;

FIG. 2 is a schematic diagram of a planar structure of a composite film of an EVA film and a PET film provided by the present invention;

FIG. 3 is a schematic view of the internal structure of the composite membrane structure according to the present invention;

in the figure: 1. a composite membrane structure; 2. a lower surface film; 3. a first adhesive layer; 4. a PET film; 5. a second adhesive layer; 6. an EVA film; 7. a third adhesive layer; 8. and (4) an upper surface film.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a composite film of an EVA film and a PET film comprises an upper surface film 8 and an EVA film 6, wherein the upper surface film 8 is arranged at the upper end of the EVA film 6, the thicknesses of the upper surface film 8 and a lower surface film 2 are equal, the thicknesses of the upper surface film 8 and the lower surface film 2 are both five to ten micrometers, the PET film 4 and the EVA film 6 between the upper surface film 8 and the lower surface film 2 are protected by the upper surface film 8 and the lower surface film 2 with proper thicknesses, the upper surface film 8 is made of an abrasion-resistant polyester film, the abrasion resistance of the upper surface of the composite film is greatly improved under the action of the upper surface film 8 made of the abrasion-resistant polyester film, the upper surface film 8 and the EVA film 6 are fixedly connected through a third bonding layer 7, the PET film 4 is arranged under the EVA film 6, the PET film 4 and the EVA film 6 are fixedly connected through a second bonding layer 5, the lower surface film 2 is arranged under the PET film 4, lower floor's epiphragma 2 adopts wear-resistant polyester film to make, and through the effect of lower floor's epiphragma 2 that wear-resistant polyester film made, greatly increased complex film lower surface's wear resistance.

The utility model provides a composite film of EVA film and PET film, lower floor's epiphragma 2, first bond line 3, PET film 4, second bond line 5, EVA film 6, third bond line 7 constitutes composite film structure 1 with upper epidermis 8 jointly, can obtain the material that has each single material comprehensive property through composite film structure 1, improve the product quality greatly, through 3 fixed connection of first bond line between lower floor's epiphragma 2 and the PET film 4, first bond line 3, the material of second bond line 5 and third bond line 7 is the adhesive, through first bond line 3, the combined action of second bond line 5 and third bond line 7, can be with lower floor's epiphragma 2, PET film 4, EVA film 6, upper epidermis 8 is closely stable each other and is connected.

The utility model discloses a theory of operation and use flow: after the utility model is installed, when the composite film of the EVA film and the PET film of the utility model is used for working, because the EVA film 6 on the composite film structure 1 is also called as an environment-friendly film, which is a new generation of green environment-friendly degradable material and has biodegradability, the composite film can not cause harm to the environment when being abandoned and burned, has the characteristics of high transparency, softness, toughness, super-strong low temperature resistance, water resistance, high heat intensity and the like, and the PET film 4 on the composite film structure 1 is a packaging film with more comprehensive performance, has good transparency, luster, good air tightness and mechanical performance, the toughness is the best of all thermoplastic plastics, and has the characteristics of good heat resistance, cold resistance, good chemical resistance, oil resistance and the like, therefore, the EVA film 6 and the PET film 4 are closely compounded through the bonding layer, so that the composite film structure 1 has good comprehensive properties, and on EVA film 6 and PET film 4, bond respectively and have upper epidermis 8 and lower floor's epidermis 2 that wear-resistant polyester film made, through the effect of wear-resistant upper epidermis 8 and lower floor's epidermis 2, greatly increased complex film upper surface's ability of resistance to wear makes utilizing the utility model relates to a composite film of EVA film and PET film carries out the during operation, and the damage can not worn and torn easily to the composite film, improves its life and durable degree greatly.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a compound film of EVA film and PET film, includes upper epidermis (8) and EVA film (6), its characterized in that: the upper end at EVA film (6) is installed in upper epidermis epiphragma (8), through third bond line (7) fixed connection between upper epidermis epiphragma (8) and EVA film (6), be provided with PET film (4) under EVA film (6), through second bond line (5) fixed connection between PET film (4) and EVA film (6), be provided with lower floor's epiphragma (2) under PET film (4), through first bond line (3) fixed connection between lower floor's epiphragma (2) and PET film (4).

2. The composite film of the EVA film and the PET film according to claim 1, wherein: the upper surface film (8) is made of wear-resistant polyester film.

3. The composite film of the EVA film and the PET film according to claim 1, wherein: the materials of the first bonding layer (3), the second bonding layer (5) and the third bonding layer (7) are all adhesives.

4. The composite film of the EVA film and the PET film according to claim 1, wherein: the lower-layer surface film (2), the first adhesive layer (3), the PET film (4), the second adhesive layer (5), the EVA film (6), the third adhesive layer (7) and the upper-layer surface film (8) jointly form a composite film structure (1).

5. The composite film of the EVA film and the PET film according to claim 1, wherein: the lower surface film (2) is made of an abrasion-resistant polyester film.

6. The composite film of the EVA film and the PET film according to claim 1, wherein: the thickness of the upper-layer surface film (8) is equal to that of the lower-layer surface film (2), and the thickness of the upper-layer surface film (8) is five to ten micrometers, and the thickness of the lower-layer surface film (2) is equal to that of the upper-layer surface film (8).