Stretch-resistant PVC shrink film

Abstract

The utility model belongs to the technical field of PVC (polyvinyl chloride) shrink films, and particularly relates to a stretch-resistant PVC shrink film which comprises a PVC shrink film main body, the PVC shrink film main body comprises a PVC base layer, reinforcing layers and wear-resistant layers, the reinforcing layers are adhered and fixed on the front surface and the back surface of the PVC base layer, and the wear-resistant layers are adhered and fixed on the reinforcing layers; the PVC base layer comprises a net-shaped core body, a PVC wrapping layer wrapping the net-shaped core body and EPTFE coatings coating the front face and the back face of the PVC wrapping layer. The PVC base layer comprises the net-shaped core body, the PVC wrapping layer wrapping the net-shaped core body and the EPTFE coatings coating the front face and the back face of the PVC wrapping layer, the stability of the net-shaped core body on the inner side is greatly improved, the problem that the net-shaped core body is prone to scattering when being pulled is solved, and due to the EPTFE coatings, the net-shaped core body is not prone to scattering when being pulled, so that the service life of the net-shaped core body is prolonged, and the service life of the net-shaped core body is prolonged. The durability and the weather resistance of the PVC shrink film are improved, and the PVC shrink film can be kept in a relatively stable state after being used outdoors for a long time.

Description

Technical Field

[0001] The utility model belongs to the technical field of PVC shrinkage films, and in particular relates to an anti-stretching PVC shrinkage film. Background Art

[0002] PVC shrink film: PVC shrink film is made by mixing ethylene-based PVC resin and more than a dozen auxiliary materials and then inflating it twice. It is characterized by good transparency, can be freely adjusted according to user needs, and has strong operability. It is mainly used in the sales and transportation process of various products to stabilize, cover and protect the products.

[0003] At present, in some usage scenarios, PVC shrink film is required to have higher tensile strength, and the tensile strength of PVC shrink film in the prior art needs to be further improved.

[0004] It was retrieved that in the prior art, a Chinese utility model patent with authorization announcement number CN217553367U discloses "a PVC shrink film", including a cylinder and a composite film, the composite film is wound on the cylinder, the composite film includes an outer layer, an inner layer, a pressure-sensitive adhesive layer and a bottom layer, the outer layer is bonded to the inner layer by the pressure-sensitive adhesive layer, the inner layer is bonded to the bottom layer by the pressure-sensitive adhesive layer, a plurality of raised airbag points are arranged on the top of the outer layer, a plurality of anti-stretching strips equidistantly and evenly arranged are arranged laterally inside the inner layer, a plurality of skeleton strips equidistantly and evenly arranged are arranged longitudinally inside the inner layer, the anti-stretching strips and the skeleton strips are woven to form a mesh structure, and the overall strength can be improved by arranging the inner layer, the plurality of anti-stretching strips and the plurality of skeleton strips, and the tensile deformation can be avoided, and the occurrence of cracking or breaking can be avoided.

[0005] Although the PVC shrink film in the prior art including the above-mentioned one has a certain anti-stretching effect and is not easy to be torn or broken, in actual use, when the PVC shrink film is pulled, the mesh structure inside it is easy to become disordered, which may cause the PVC shrink film to deform in severe cases, affecting the normal use of the PVC shrink film.

[0006] In order to solve the above problems, the present application proposes a stretch-resistant PVC shrink film. Utility Model Content

[0007] In order to solve the above problems existing in the prior art, the utility model provides an anti-stretching PVC shrink film, which has the characteristics of easy use and high safety performance.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a stretch-resistant PVC shrink film, comprising a PVC shrink film body, wherein the PVC shrink film body comprises a PVC base layer, a reinforcement layer bonded and fixed to the front and back surfaces of the PVC base layer, and a wear-resistant layer bonded and fixed to the reinforcement layer;

[0009] The PVC base layer comprises a mesh core, a PVC wrapping layer wrapped on the mesh core, and an EPTFE coating layer coated on the front and back surfaces of the PVC wrapping layer.

[0010] As a preferred technical solution of the utility model, the mesh core is a mesh polyester fiber component.

[0011] As a preferred technical solution of the utility model, the mesh core comprises warp polyester fibers and weft polyester fibers, and a plurality of the warp polyester fibers and a plurality of the weft polyester fibers are crisscross-woven to form the mesh core.

[0012] As a preferred technical solution of the utility model, the thickness of the PVC base layer is μ10m-20μm.

[0013] As a preferred technical solution of the utility model, the reinforcement layer is a linear low-density polyethylene film.

[0014] As a preferred technical solution of the utility model, through holes are evenly distributed on the reinforcement layer.

[0015] As a preferred technical solution of the present invention, the thickness of the reinforcement layer is 2 μm-10 μm.

[0016] As a preferred technical solution of the utility model, the wear-resistant layer is one of polyimide, polystyrene or polyurethane.

[0017] As a preferred technical solution of the utility model, anti-wear protrusions are evenly distributed on the surface of the wear-resistant layer.

[0018] As a preferred technical solution of the utility model, the thickness of the wear-resistant layer is 2μm-10μm.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] In the utility model, the PVC base layer includes a mesh core, a PVC wrapping layer wrapped on the mesh core, and an EPTFE coating coated on the front and back surfaces of the PVC wrapping layer, which greatly improves the stability of the inner mesh core and avoids the problem that the mesh core is easily scattered when being pulled. In addition, the EPTFE coating is provided to improve the durability and weather resistance of the PVC shrink film, so that it can remain in a relatively stable state even during long-term outdoor use.

[0021] Other additional advantages and beneficial effects of the present application will be given in part in the following description, and in part will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the partial decomposition structure of the main body of the PVC shrink film in the utility model;

[0025] Figure 3 This is a schematic diagram of the cross-sectional structure of the PVC base layer in the utility model;

[0026] Figure 4 It is a schematic diagram of the axonometric structure of the mesh core in the utility model.

[0027] In the figure: 1, PVC shrink film body; 11, PVC base layer; 111, mesh core; 1111, warp polyester fiber yarn; 1112, weft polyester fiber yarn; 112, PVC wrapping layer; 113, EPTFE coating; 12, reinforcement layer; 121, through hole; 13, wear-resistant layer; 131, anti-wear protrusion. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Example 1

[0030] See also Figure 1-Figure 4 The utility model provides the following technical solution: a stretch-resistant PVC shrink film, including a PVC shrink film body 1.

[0031] Further, by Figure 1-Figure 4As shown, in this embodiment, the PVC shrink film body 1 includes a PVC base layer 11, a reinforcement layer 12 bonded and fixed to the front and back surfaces of the PVC base layer 11, and a wear-resistant layer 13 bonded and fixed to the reinforcement layer 12. The PVC base layer 11 includes a mesh core 111, a PVC wrapping layer 112 wrapped on the mesh core 111, and an EPTFE coating 113 coated on the front and back surfaces of the PVC wrapping layer 112. After adopting the above scheme, the PVC shrink film body 1 of the utility model is a five-layer composite film structure composed of a PVC base layer 11, two reinforcement layers 12 and two wear-resistant layers 13, and The PVC base layer 11 includes a mesh core 111, a PVC wrapping layer 112 wrapped on the mesh core 111, and an EPTFE coating 113 coated on the front and back sides of the PVC wrapping layer 112. The mesh core 111 has a bidirectional tensile resistance effect and is wrapped by the PVC wrapping layer 112 on the periphery, which can greatly improve the stability of the mesh core 111 and avoid the problem that the mesh core 111 is easily scattered when being pulled. In addition, the EPTFE coating 113 is set to improve the durability and weather resistance of the PVC shrink film, so that it can remain in a relatively stable state even during long-term outdoor use.

[0032] It should be noted that, for the PVC base layer 11, the PVC wrapping layer 112 can be fixed on the mesh core 111 by extrusion equipment, or the PVC wrapping layer 112 and the mesh core 111 can be fixedly connected by hot pressing, or the PVC wrapping layer 112 can be bonded and fixed to the mesh core 111 by adhesive.

[0033] Optionally, by Figure 1-Figure 4 As shown, in this embodiment, the mesh core 111 is a mesh polyester fiber component, which has the characteristics of moisture resistance, UV protection and heat insulation, and the polyester fiber has high mechanical stability and good tensile resistance.

[0034] Optionally, by Figure 1-Figure 4 As shown, in this embodiment, the mesh core 111 includes warp polyester fiber yarns 1111 and weft polyester fiber yarns 1112. A plurality of warp polyester fiber yarns 1111 and a plurality of weft polyester fiber yarns 1112 are criss-crossed and woven to form the mesh core 111. The mesh core 111 structure has a bidirectional tensile resistance effect, which can resist the stretching of the PVC shrink film in different directions, thereby ensuring the safety and stability of the PVC shrink film.

[0035] Optionally, by Figure 1-Figure 3 As shown, in this embodiment, the thickness of the PVC base layer 11 is 10 μm.

[0036] Optionally, by Figure 1 and Figure 2As shown, in this embodiment, the reinforcement layer 12 is a linear low-density polyethylene film, namely, an LLDPE film, which has high tensile properties and toughness and high mechanical stability.

[0037] Preferably, by Figure 1 and Figure 2 As shown, in this embodiment, through holes 121 are evenly distributed on the reinforcement layer 12. The arrangement of the through holes 121, on the one hand, when the PVC shrink film is pulled or bent, it can be deformed at the position of the through holes 121 to avoid the external force. When the external force is eliminated, relying on the characteristics of the linear low-density polyethylene film, the PVC shrink film will automatically recover to avoid the reinforcement layer 12 from breaking due to pulling or bending. On the other hand, when the PVC base layer 11, the reinforcement layer 12 and the wear-resistant layer 13 are bonded and fixed with an adhesive, part of the adhesive will squeeze into the through holes 121, which greatly improves the stability of the combined fixation of the PVC base layer 11, the reinforcement layer 12 and the wear-resistant layer 13.

[0038] Optionally, by Figure 1 and Figure 2 As shown, in this embodiment, the thickness of the reinforcement layer 12 is 2 μm.

[0039] Optionally, by Figure 1 and Figure 2 As shown, in this embodiment, the wear-resistant layer 13 is one of polyimide, polystyrene or polyurethane, such as polyimide, which has excellent anti-static performance, high temperature tolerance and wear resistance. It can not only further improve the tensile and bending resistance of the PVC shrink film, but also further improve the wear resistance, anti-static performance and temperature resistance of the PVC shrink film, and can maintain a relatively stable state during long-term outdoor use.

[0040] Preferably, by Figure 1 and Figure 2 As shown, in this embodiment, anti-wear protrusions 131 are evenly distributed on the surface of the wear-resistant layer 13 . The utility model further improves the wear resistance of the PVC shrink film by providing the anti-wear protrusions 131 .

[0041] Optionally, by Figure 1 and Figure 2 As shown, in this embodiment, the thickness of the wear-resistant layer 13 is 2 μm.

[0042] Example 2

[0043] This embodiment is basically the same as Embodiment 1, except that, in this embodiment, the thickness of the PVC base layer 11 is 15 μm, the thickness of the reinforcement layer 12 is 6 μm, and the thickness of the wear-resistant layer 13 is 6 μm. Therefore, the thickness of the PVC shrink film is improved compared with Embodiment 1, meeting the use scenario with higher mechanical strength of the PVC shrink film.

[0044] Example 3

[0045] This embodiment is basically the same as Embodiment 1 and Embodiment 2, except that, in this embodiment, the thickness of the PVC base layer 11 is 20 μm, the thickness of the reinforcement layer 12 is 10 μm, and the thickness of the wear-resistant layer 13 is 10 μm. Therefore, the thickness of the PVC shrink film is improved compared with Embodiment 1 and Embodiment 2, meeting the use scenario of higher mechanical strength of the PVC shrink film.

[0046] Components not described in detail herein are prior art.

[0047] Working principle and use process of the utility model: the PVC shrink film of the utility model, the PVC shrink film body 1 of the utility model is a five-layer composite film structure composed of a PVC base layer 11, two reinforcement layers 12 and two wear-resistant layers 13, and the PVC base layer 11 includes a mesh core 111, a PVC wrapping layer 112 wrapped on the mesh core 111, and an EPTFE coating 113 coated on the front and back surfaces of the PVC wrapping layer 112;

[0048] The mesh core 111 has a bidirectional tensile resistance effect, and is wrapped by a PVC wrapping layer 112 on the periphery, which can greatly improve the stability of the mesh core 111 and prevent the mesh core 111 from being easily scattered when being pulled. In addition, the EPTFE coating 113 is provided to improve the durability and weather resistance of the PVC shrink film, so that it can remain in a relatively stable state even when used outdoors for a long time.

[0049] The reinforcement layer 12 is a linear low-density polyethylene film, i.e., an LLDPE film, which has high tensile properties and toughness and high mechanical stability. The wear-resistant layer 13 is one of polyimide, polystyrene or polyurethane, which has excellent anti-static properties, high temperature tolerance and wear resistance. It can not only further improve the tensile and bending resistance of the PVC shrink film, but also further improve the wear resistance, anti-static performance and temperature resistance of the PVC shrink film, and can maintain a relatively stable state during long-term outdoor use.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A stretch-resistant PVC shrink film, comprising a PVC shrink film body (1), characterized in that: The PVC shrink film body (1) comprises a PVC base layer (11), a reinforcement layer (12) bonded and fixed to the front and back surfaces of the PVC base layer (11), and a wear-resistant layer (13) bonded and fixed to the reinforcement layer (12); The PVC base layer (11) comprises a mesh core (111), a PVC wrapping layer (112) wrapped on the mesh core (111), and an EPTFE coating (113) coated on the front and back surfaces of the PVC wrapping layer (112).

2. The stretch-resistant PVC shrink film according to claim 1, characterized in that: The mesh core (111) is a mesh polyester fiber component.

3. The stretch-resistant PVC shrink film according to claim 2, characterized in that: The mesh core (111) comprises warp polyester fiber yarns (1111) and weft polyester fiber yarns (1112); a plurality of the warp polyester fiber yarns (1111) and a plurality of the weft polyester fiber yarns (1112) are crisscrossed and woven to form the mesh core (111).

4. The stretch-resistant PVC shrink film according to claim 1, characterized in that: The thickness of the PVC base layer (11) is 10 μm-20 μm.

5. The stretch-resistant PVC shrink film according to claim 1, characterized in that: The reinforcement layer (12) is a linear low-density polyethylene film.

6. The stretch-resistant PVC shrink film according to claim 1, characterized in that: Through holes (121) are evenly distributed on the reinforcement layer (12).

7. The stretch-resistant PVC shrink film according to claim 1, characterized in that: The thickness of the reinforcement layer (12) is 2 μm-10 μm.

8. The stretch-resistant PVC shrink film according to claim 1, characterized in that: The wear-resistant layer (13) is one of polyimide, polystyrene or polyurethane.

9. The stretch-resistant PVC shrink film according to claim 1, characterized in that: Anti-wear protrusions (131) are evenly distributed on the surface of the wear-resistant layer (13).

10. The stretch-resistant PVC shrink film according to claim 1, characterized in that: The wear-resistant layer (13) has a thickness of 2 μm-10 μm.

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