CN218140407U

CN218140407U - Composite film structure

Info

Publication number: CN218140407U
Application number: CN202221218097.XU
Authority: CN
Inventors: 吴宇涛; 傅秋佳
Original assignee: Zhejiang Dahua Technology Co Ltd
Current assignee: Zhejiang Dahua Technology Co Ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-12-27
Anticipated expiration: 2032-05-20

Abstract

The application relates to the technical field of films, in particular to a composite film structure, which comprises: the base layer is a TPU thin film layer and is provided with a first surface and a second surface which are arranged oppositely; the base layer comprises a reinforced tensile layer and an elastic blocking layer which are arranged in a laminated mode; the wear-resistant layer is arranged on the first surface and compounded with the first surface; and the heat sealing layer is arranged on the second surface and is compounded with the second surface. According to the composite film structure, the substrate layer comprises the reinforced tensile layer and the elastic blocking layer, so that the impact strength and the elastic performance are respectively enhanced, and the substrate layer has different performances; and through set up wearing layer and heat-seal layer at the both sides complex of stratum basale, improve the intensity and the abrasive resistance of composite film structure to and improve its heat sealability, make the function of composite film structure obtain strengthening, the performance is better excellent, with the application scope of expanding composite film, satisfy the growing demand in the market.

Description

Composite film structure

Technical Field

The application relates to the technical field of films, in particular to a composite film structure.

Background

The existing TPU material is often used in the fields of textile and packaging, and is mostly used for a single-layer pure TPU film. The TPU film has high elasticity, high transparency and other high-quality performances, but the TPU film has low surface hardness, poor wear resistance and poor heat sealing strength of a film body, so that the TPU film has a small application range and is difficult to meet the market demand.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a composite film structure having high strength, abrasion resistance and excellent heat sealability.

In view of the above technical problems, the present application provides the following technical solutions:

a composite film structure, comprising:

the base layer is a TPU thin film layer and is provided with a first surface and a second surface which are arranged oppositely; the base layer comprises a reinforced tensile layer and an elastic barrier layer which are arranged in a laminated mode;

the wear-resistant layer is arranged on the first surface and compounded with the first surface;

and the heat sealing layer is arranged on the second surface and is compounded with the second surface.

In one embodiment, the tensile reinforcement layer is disposed between the wear layer and the elastic barrier layer, and the elastic barrier layer is disposed between the tensile reinforcement layer and the heat seal layer.

In one embodiment, the reinforced tensile layer and the elastic barrier layer are compounded to form the substrate layer by adopting a co-extrusion process, wherein the co-extrusion heating temperature is 205-215 ℃.

In one embodiment, the wear-resistant layer includes a reinforced wear-resistant layer and an adhesive layer, the adhesive layer is disposed on the first surface of the substrate layer, and the reinforced wear-resistant layer is disposed on a side surface of the adhesive layer away from the substrate layer.

In one embodiment, the reinforced wear-resistant layer is arranged as a PU film layer; wherein the PU film layer is corona and/or flame treated.

In one embodiment, the wear-resistant layer further comprises a gloss oil layer, and the gloss oil layer is subjected to curing treatment; the gloss oil layer is arranged on the surface of the reinforced wear-resistant layer.

In one embodiment, the heat-sealing layer further comprises an impact-resistant layer and a heat-sealing outer layer, the impact-resistant layer is arranged on the second surface of the substrate layer, and the heat-sealing outer layer is arranged on the surface of the impact-resistant layer far away from the substrate layer.

In one embodiment, the heat-seal outer layer is made of PET or BOPP material.

In one embodiment, the impact resistant layer is a PE film layer.

In one embodiment, the impact-resistant layer and the heat-seal outer layer are compounded to form the heat-seal layer by adopting a co-extrusion process, wherein the co-extrusion heating temperature is 115-135 ℃.

Compared with the prior art, the composite film structure provided by the application has the advantages that the base layer is the TPU thin film layer, the TPU thin film has high elasticity, high transparency and other high-quality performances, the base layer is the TPU thin film layer, so that the base layer has high strength and transparency, the base layer is of a multilayer structure, specifically, the base layer comprises the reinforced tensile layer and the elastic blocking layer, the reinforced tensile layer is used for improving the impact strength and the modulus of the base layer, and the elastic blocking layer is used for improving the elastic performance of the base layer, so that the base layer has different performances; and through set up wearing layer and heat-seal layer at the both sides complex of stratum basale, improve the intensity and the wearability of composite film structure to and improve its heat sealability, make the function of composite film structure obtain strengthening, the performance is better excellent, with the application scope of expanding composite film, satisfy the growing demand in the market.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the description of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the description below are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of a composite film structure according to an embodiment of the present disclosure.

Reference numerals: 100. a composite film structure; 10. a base layer; 11. a reinforced tensile layer; 12. an elastic barrier layer; 20. a wear layer; 21. strengthening the wear-resistant layer; 22. an adhesive layer; 23. polishing the oil layer; 30. a heat seal layer; 31. an anti-impact layer; 32. and (4) heat-sealing the outer layer.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiment in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and therefore the application is not limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used in the description of the present application are for illustrative purposes only and do not represent the only embodiments.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact via an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the description of the present application, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, the present application provides an embodiment of a composite film structure 100, where the composite film structure 100 includes a substrate layer 10, an abrasion-resistant layer 20, and a heat-sealing layer 30, where the substrate layer 10 includes a reinforced tensile layer 11 and an elastic barrier layer 12 which are stacked together, and the substrate layer 10 is a TPU film layer; the substrate layer 10 has a first surface and a second surface opposite to each other, the wear-resistant layer 20 is disposed on the first surface and combined with the first surface, and the heat-seal layer 30 is disposed on the second surface and combined with the second surface.

It can be understood that the substrate layer 10 is a TPU thin film layer, the TPU thin film has high elasticity, high transparency and other excellent properties, the substrate layer 10 is a TPU thin film layer, so that the substrate layer 10 has high strength and transparency, and the substrate layer 10 is a multilayer structure, specifically, the substrate layer 10 includes a reinforced tensile layer 11 and an elastic barrier layer 12, the reinforced tensile layer 1 is used for improving the impact strength and modulus of the substrate layer 10, and the elastic barrier layer 12 is used for improving the elastic properties of the substrate layer 10, so that the substrate layer 10 has different properties; and through set up wearing layer 20 and heat-seal layer 30 at the compound both sides of stratum basale 10 to can improve the intensity and the wearability of composite film structure 100, and improve its heat sealability, make composite film structure 100's function strengthened, the performance is better excellent, with the application scope who enlarges composite film, satisfies the ever-increasing demand in the market.

On one hand, on the surface of the plastic tuyere in a molten state, polymer chain segments are mutually diffused, permeated and mutually wound to achieve sealing tightness, and the heat sealing performance of the composite film structure 100 is improved, so that the sealing tightness of the product packaged and sealed by adopting the composite film is improved.

In this embodiment, first, the substrate layer 10 and the wear-resistant layer 20 are compounded in a compounding machine to form a double-layer composite film, and the double-layer composite film is subjected to drawing annealing on the compounding machine to eliminate the internal stress of the composite film; then, the double-layer composite film obtained by the primary compounding is secondarily compounded with the heat seal layer 30, so that the composite film structure 100 is manufactured.

As shown in fig. 1, the tensile reinforcement layer 11 is disposed between the wear-resistant layer 20 and the elastic barrier layer 12, and the elastic barrier layer 12 is disposed between the tensile reinforcement layer 11 and the heat seal layer 30. Of course, in other embodiments, the abrasion-resistant layer 20 may be disposed on the surface of the elastic barrier layer 12 away from the tensile reinforcing layer 11, and the heat-sealing layer 30 may be disposed on the surface of the tensile reinforcing layer 11 away from the elastic barrier layer 12.

Specifically, the reinforced tensile layer 11 is a modified TPU film layer, and the reinforced tensile layer 11 is formed by modifying a TPU material so as to improve the impact strength of the reinforced tensile layer 11. Similarly, the elastic barrier layer 12 is a modified TPU film layer, and the modified TPU material is modified to form the elastic barrier layer 12, so as to improve the elasticity and barrier capability of the elastic barrier layer 12.

In the application, the reinforced tensile layer 11 and the elastic barrier layer 12 are compounded to form the substrate layer 10 by adopting a co-extrusion process, wherein the co-extrusion heating temperature of the co-extrusion film blowing equipment is 205-215 ℃.

In one embodiment, the elastic barrier layer 12 has a film thickness of 1-3 filaments, such as 1 filament, 2.2 filaments, 3 filaments, etc. for the elastic barrier layer 12. Of course, in other embodiments, the thickness of the film body may be adjusted according to the application scenario, and the range of the thickness of the film body is not limited to the 1-3 filaments, and may be smaller than 1 filament or larger than 3 filaments.

As shown in fig. 1, the wear-resistant layer 20 includes a reinforced wear-resistant layer 21 and an adhesive layer 22, the adhesive layer 22 is disposed on the first surface of the base layer 10, and the reinforced wear-resistant layer 21 is disposed on a side surface of the adhesive layer 22 away from the base layer 10.

In one embodiment, the reinforced wear layer 21 is provided as a PU film layer; wherein, the PU film layer is processed by corona and/or flame to change the performance, which is beneficial to improving the surface tension, the adhesion and the wettability of the PU film layer.

Further, the wear-resistant layer 20 further comprises a gloss oil layer 23, the gloss oil layer 23 is arranged on the surface of the reinforced wear-resistant layer 21, and the gloss oil layer 23 is cured to improve the scratch and scratch resistance of the surface of the reinforced wear-resistant layer 21.

In one embodiment, the varnish layer 23 is UV varnish, and the UV varnish is coated on the surface of the reinforced wear-resistant layer 21 and is cured and hardened after being irradiated by UV light, so that the wear resistance of the surface of the reinforced wear-resistant layer 21 can be improved.

In one embodiment, the thickness of the reinforced wear-resistant layer 21 is 1-1.5 filaments, for example, the thickness of the reinforced wear-resistant layer 21 is 1 filament, 0.8 filament, 1.5 filament, etc. Of course, in other embodiments, the thickness of the film body of the reinforced wear-resistant layer 21 may be adjusted according to the application scenario, for example, the film body may also be smaller than 1 filament or larger than 1.5 filaments.

As shown in fig. 1, the heat-sealing layer 30 further includes an impact-resistant layer 31 and a heat-sealing outer layer 32, the impact-resistant layer 31 is disposed on the second surface of the substrate layer 10, and the heat-sealing outer layer 32 is disposed on a surface of the impact-resistant layer 31 away from the substrate layer 10. Wherein the impact resistant layer 31 is used to improve the impact resistance of the composite film structure 100, and the heat-seal outer layer 32 is used to improve the heat-seal performance of the composite film structure 100.

In one embodiment, the heat seal outer layer 32 is made of PE, although in other embodiments, BOPP may be used.

In this embodiment, the impact-resistant layer 31 is a PE film layer, and the PE material is modified to increase the impact resistance of the PE film layer. The heat-seal outer layer 32 is a PE film layer, and PE materials are modified to improve the heat-seal performance of the PE film layer.

As shown in FIG. 1, the impact resistant layer 31 and the heat-seal outer layer 32 are compounded by a co-extrusion process to form the heat-seal layer 30, wherein the co-extrusion heating temperature is 115-135 ℃.

Preferably, the heat-sealing temperature intervals of the substrate layer 10 and the heat-sealing layer 30 are different, so that the heat-sealing temperature interval is increased, and the heat-sealing performance is further improved, so that the heat-sealing device is suitable for devices with different heat-sealing temperatures.

In one embodiment, the thickness of the film body of the impact resistant layer 31 is 0.5-1.5 filaments, for example, the thickness of the film body of the impact resistant layer 31 is 0.5 filaments, 1.2 filaments, 1.5 filaments, etc. Of course, in other embodiments, the thickness of the film body of the anti-impact layer 31 may also be adjusted according to the application scenario, for example, the film body may also be smaller than 0.5 filament or larger than 1.5 filament.

In one embodiment, the heat-seal outer layer 32 has a film thickness of 0.5 to 1.5 filaments, such as 0.5 filaments, 0.8 filaments, 1.5 filaments, etc. for example. Of course, the film thickness of the heat-sealing outer layer 32 can be adjusted in other embodiments according to the application scenario, for example, the film thickness can also be less than 0.5 filament or greater than 1.5 filament.

To sum up, the composite film structure 100 that this application provided sets up through multilayer structure is compound and carries out processing such as modification for composite film structure 100 obtains different performance advantages, and the composite film structure 100 intensity that makes is big, has excellent heat sealability, and the thin composite film structure 100 does not appear obvious silver line after stretching the resilience many times, has higher intensity and transparency, is applicable to multiple application scene.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A composite film structure, comprising:

the base layer (10) is a TPU thin film layer and is provided with a first surface and a second surface which are arranged oppositely; wherein the substrate layer (10) comprises a reinforced tensile layer (11) and an elastic barrier layer (12) which are arranged in a laminated manner;

the wear-resistant layer (20) is arranged on the first surface, and the wear-resistant layer (20) is compounded with the first surface;

and the heat sealing layer (30) is arranged on the second surface and is compounded with the second surface.

2. Composite film structure according to claim 1, wherein said tensile reinforcement layer (11) is interposed between said wear layer (20) and said elastic barrier layer (12), said elastic barrier layer (12) being interposed between said tensile reinforcement layer (11) and said heat seal layer (30).

3. The composite film structure of claim 1, wherein the reinforced tensile layer (11) and the elastic barrier layer (12) are compounded to form the substrate layer (10) by a co-extrusion process, wherein the co-extrusion heating temperature is 205-215 ℃.

4. The composite film structure of claim 1, wherein the wear layer (20) comprises a reinforced wear layer (21) and an adhesive layer (22), the adhesive layer (22) is disposed on the first surface of the substrate layer (10), and the reinforced wear layer (21) is disposed on a side surface of the adhesive layer (22) away from the substrate layer (10).

5. The composite film structure of claim 4, wherein the reinforced abrasion resistant layer (21) is provided as a PU film layer; wherein the PU film layer is corona and/or flame treated.

6. The composite film structure of claim 5, wherein the abrasion resistant layer (20) further comprises a varnish layer (23), the varnish layer (23) being cured; the gloss oil layer (23) is arranged on the surface of the reinforced wear-resistant layer (21).

7. The composite film structure of claim 1, wherein the heat-sealing layer (30) further comprises an impact-resistant layer (31) and a heat-sealing outer layer, the impact-resistant layer (31) is disposed on the second surface of the substrate layer (10), and the heat-sealing outer layer is disposed on a side surface of the impact-resistant layer (31) away from the substrate layer (10).

8. The composite film structure of claim 7 wherein the heat seal outer layer is made of a PET or BOPP material.

9. The composite film structure of claim 7 wherein said impact resistant layer is a PE film layer.

10. The coextruded film structure of claim 8 wherein said impact resistant layer (31) and said heat seal outer layer are coextruded to form said heat seal layer (30) using a coextrusion process wherein the temperature of the coextrusion heat is 115-135 ℃.