High-temperature-resistant PVC (polyvinyl chloride) film

Abstract

The utility model discloses a high-temperature-resistant PVC (polyvinyl chloride) film, which comprises a first PVC base film, a first adhesive layer, a warp-knitted spacer fabric layer, a heat-insulating layer and a flame-retardant layer, and the first adhesive layer is coated on the surface of one side of the warp-knitted spacer fabric layer; the first PVC base film is attached to the surface of the side, opposite to the warp-knitted spacer fabric layer, of the first adhesive layer, so that the first PVC base film is adhered to the surface of the warp-knitted spacer fabric layer; the heat insulation layer and the flame-retardant layer are sequentially stacked and connected to the surface of one side, opposite to the warp-knitted spacer fabric layer, of the first PVC base film. According to the high-temperature-resistant PVC film disclosed by the utility model, the first PVC base film and the warp-knitted spacer fabric layer are bonded into a whole through a laminating process, so that a PVC film laminated warp-knitted spacer fabric structure with good stripping resistance, aging resistance and a certain self-cleaning function is obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of PVC films, in particular to a high-temperature resistant PVC film. Background Art

[0002] PVC film is a film made of polyvinyl chloride (PVC). PVC is a plastic material with a wide range of uses, including film products. PVC film has a series of properties that make it used in many fields. It is usually pasted on an object to protect it. The current PVC film usually only has high light transmittance and can achieve the basic effect of scratch resistance. In some existing PVC film products, the heat resistance of PVC film is improved by adding heat-resistant and flame-retardant materials on the surface.

[0003] However, existing PVC film products only add a heat-resistant layer and a flame-retardant layer, and their high-temperature resistance is limited. Faced with increasingly wide application scenarios, the high-temperature resistance of existing PVC film products still needs to be improved. Utility Model Content

[0004] Based on this, it is necessary to provide a high temperature resistant PVC film to address the technical problem that the existing PVC film has insufficient high temperature resistance.

[0005] A high temperature resistant PVC film comprises a first PVC base film, a first adhesive layer, a warp knitted spacer fabric layer, a heat insulating layer and a flame retardant layer, wherein the first adhesive layer is coated on one side surface of the warp knitted spacer fabric layer; the first PVC base film is attached to the side surface of the first adhesive layer facing away from the warp knitted spacer fabric layer, so that the first PVC base film is bonded to the surface of the warp knitted spacer fabric layer; the heat insulating layer and the flame retardant layer are sequentially stacked and connected to the side surface of the first PVC base film facing away from the warp knitted spacer fabric layer.

[0006] In one embodiment, the warp-knitted spacer fabric layer is a chain-knitted + warp-biased structure using aromatic polyamide fibers as yarns.

[0007] In one embodiment, the surface density of the warp knitted spacer fabric is 9-10 g / cm 2 .

[0008] In one embodiment, the warp-knitted spacer fabric has a transverse density of 25 / cm.

[0009] In one embodiment, the longitudinal density of the warp-knitted spacer fabric is 16 / cm.

[0010] In one embodiment, the spacer yarns of the warp knitted spacer fabric are arranged in parallel, and the density of the spacer yarns is 11200 m 2.

[0011] In one embodiment, the specifications of the aromatic polyamide fiber yarns of the warp-knitted spacer fabric include: the surface structure yarn specification is 500 / 96f; the spacer yarn specification is 500 / 96f.

[0012] In one embodiment, the above-mentioned high temperature resistant PVC film also includes a second PVC base film and a second adhesive layer. The second adhesive layer is coated on the side surface of the warp knitted spacer fabric layer facing away from the first adhesive layer, and the second PVC base film is attached to the side surface of the second adhesive layer facing away from the warp knitted spacer fabric layer.

[0013] In one embodiment, the above-mentioned high temperature resistant PVC film also includes a third adhesive layer and a release layer. The third adhesive layer is coated on the side surface of the second PVC base film facing away from the second adhesive layer; the release layer is attached to the side surface of the third adhesive layer facing away from the second PVC base film.

[0014] In one embodiment, the third adhesive layer is prepared by coating with a pressure-sensitive adhesive.

[0015] In summary, the high temperature resistant PVC film disclosed by the utility model is obtained by bonding the first PVC base film and the warp knitted spacer fabric layer together through a lamination process, thereby obtaining a PVC film laminated warp knitted spacer fabric structure with good peeling resistance, aging resistance and certain self-cleaning function; at the same time, the heat insulation layer and the flame retardant layer are sequentially attached to the surface of the first PVC base film to obtain the high temperature resistant PVC film of the utility model, thereby further improving the overall high temperature resistance of the PVC film. Among them, the warp knitted spacer fabric layer is prepared using PPTA as yarn, and the warp knitted spacer fabric layer can greatly enhance the tensile strength, stability and high temperature resistance of the high temperature resistant PVC film of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a high temperature resistant PVC film in one embodiment;

[0017] Figure 2 This is a schematic diagram of the structure of a high temperature resistant PVC film in one embodiment;

[0018] Figure 3 Schematic diagram of the structure of a high temperature resistant PVC film in one embodiment. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0025] See also Figure 1 The utility model discloses a high temperature resistant PVC film, which includes a first PVC base film 1, a first adhesive layer 2, a warp knitted spacer fabric layer 3, a heat insulation layer 4 and a flame retardant layer 5. The first adhesive layer 2 is coated on one side surface of the warp knitted spacer fabric layer 3; the first PVC base film 1 is attached to the side surface of the first adhesive layer 2 facing away from the warp knitted spacer fabric layer 3, so that the first PVC base film 1 is bonded to the surface of the warp knitted spacer fabric layer 3; the heat insulation layer 4 and the flame retardant layer 5 are stacked and connected in sequence to the side surface of the first PVC base film 1 facing away from the warp knitted spacer fabric layer 3. In practical applications, the first PVC base film 1 and the warp knitted spacer fabric layer 3 are bonded together through a lamination process, thereby obtaining a PVC film laminated warp knitted spacer fabric structure with good peeling resistance, aging resistance and certain self-cleaning function; at the same time, the heat insulation layer 4 and the flame retardant layer 5 are attached in sequence to the surface of the first PVC base film 1 to obtain the high temperature resistant PVC film of the utility model, thereby further improving the overall high temperature resistance of the PVC film.

[0026] Specifically, the warp knitted spacer fabric layer 3 is a braided chain + warp diagonal structure with aromatic polyamide fibers as yarns. Aromatic polyamide is a linear polymer formed by directly connecting two aromatic rings with an amide bond. In this embodiment, the warp knitted spacer fabric layer 3 is prepared using PPTA as yarn. The PPTA fiber macromolecule has strong rigidity, and the molecular chain hardly bends and remains completely straight. This structure gives the PPTA fiber high strength and modulus. PPTA has good thermal stability, and its strength remains basically unchanged after long-term heat treatment at 160°C; its T gAbout 345℃, it does not melt at high temperature and shrinks less; the decomposition temperature in nitrogen environment is about 55℃ higher than that in air; PPTA has good chemical resistance, such as common organic solvents, salt solvents, etc. Therefore, the warp knitted spacer fabric layer 3 can greatly enhance the stretchability, stability and high temperature resistance of the high temperature resistant PVC film of the utility model.

[0027] Specifically, the surface density of the warp knitted spacer fabric is 9-10g / cm 2 , among which the horizontal density is 25 / cm and the vertical density is 16 / cm.

[0028] Specifically, the spacer yarns of the warp knitted spacer fabric are arranged in parallel, and the density of the spacer yarns is 11200m 2 .

[0029] Specifically, the specifications of the aromatic polyamide fiber yarns of the warp-knitted spacer fabric include: the surface structure yarn specification is 500 / 96f; the spacer yarn specification is 500 / 96f.

[0030] See also Figure 2 Furthermore, the high temperature resistant PVC film also includes a second PVC base film 6 and a second adhesive layer 7. The second adhesive layer 7 is coated on the side surface of the warp knitted spacer fabric layer 3 facing away from the first adhesive layer 2, and the second PVC base film 6 is attached to the side surface of the second adhesive layer 7 facing away from the warp knitted spacer fabric layer 3, so that the second PVC base film 6 cooperates with the first PVC base film 1 to cover the two side surfaces of the warp knitted spacer fabric layer 3, thereby further improving the structural stability of the PVC film laminated warp knitted spacer fabric structure.

[0031] See also Figure 3 Furthermore, the high temperature resistant PVC film also includes a third adhesive layer 8 and a release layer 9. The third adhesive layer 8 is coated on the surface of the second PVC base film 6 which is away from the second adhesive layer 7; the release layer 9 is attached to the surface of the third adhesive layer 8 which is away from the second PVC base film 6, so that the high temperature resistant PVC film of the utility model has an attachment function, thereby improving the convenience of using the high temperature resistant PVC film.

[0032] Specifically, the third adhesive layer 8 is prepared by coating with a pressure-sensitive adhesive.

[0033] In summary, the high temperature resistant PVC film disclosed by the utility model is obtained by bonding the first PVC base film and the warp knitted spacer fabric layer together through a lamination process, thereby obtaining a PVC film laminated warp knitted spacer fabric structure with good peeling resistance, aging resistance and certain self-cleaning function; at the same time, the heat insulation layer and the flame retardant layer are sequentially attached to the surface of the first PVC base film to obtain the high temperature resistant PVC film of the utility model, thereby further improving the overall high temperature resistance of the PVC film. Among them, the warp knitted spacer fabric layer is prepared using PPTA as yarn, and the warp knitted spacer fabric layer can greatly enhance the tensile strength, stability and high temperature resistance of the high temperature resistant PVC film of the utility model.

[0034] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A high temperature resistant PVC film, characterized in that: include: A first PVC base film, a first adhesive layer, a warp knitted spacer fabric layer, a heat insulation layer and a flame retardant layer, wherein the first adhesive layer is coated on one side surface of the warp knitted spacer fabric layer; The first PVC base film is attached to the surface of the first adhesive layer on the side facing away from the warp knitted spacer fabric layer, so that the first PVC base film is bonded to the surface of the warp knitted spacer fabric layer; the heat insulation layer and the flame retardant layer are stacked and connected in sequence on the surface of the first PVC base film on the side facing away from the warp knitted spacer fabric layer.

2. The high temperature resistant PVC film according to claim 1, characterized in that: The warp knitted spacer fabric layer is a chain-knitted + warp-bend structure with aromatic polyamide fibers as yarns.

3. The high temperature resistant PVC film according to claim 2, characterized in that: The surface density of the warp knitted spacer fabric is 9-10 g / cm 2 .

4. The high temperature resistant PVC film according to claim 3, characterized in that: The transverse density of the warp-knitted spacer fabric is 25 / cm.

5. The high temperature resistant PVC film according to claim 4, characterized in that: The longitudinal density of the warp-knitted spacer fabric is 16 / cm.

6. The high temperature resistant PVC film according to claim 5, characterized in that: The spacer yarns of the warp knitted spacer fabric are arranged in parallel, and the density of the spacer yarns is 11200 m 2 .

7. The high temperature resistant PVC film according to claim 6, characterized in that: The specifications of the aromatic polyamide fiber yarns of the warp-knitted spacer fabric include: the specifications of the surface structure yarns are 500 / 96f; the specifications of the spacer yarns are 500 / 96f.

8. The high temperature resistant PVC film according to claim 7, characterized in that: The high temperature resistant PVC film also includes a second PVC base film and a second adhesive layer. The second adhesive layer is coated on the side of the warp knitted spacer fabric layer facing away from the first adhesive layer, and the second PVC base film is attached to the side of the second adhesive layer facing away from the warp knitted spacer fabric layer.

9. The high temperature resistant PVC film according to claim 8, characterized in that: The high temperature resistant PVC film also includes a third adhesive layer and a release layer. The third adhesive layer is coated on the surface of the second PVC base film on the side facing away from the second adhesive layer; the release layer is attached to the surface of the third adhesive layer on the side facing away from the second PVC base film.

10. The high temperature resistant PVC film according to claim 9, characterized in that: The third adhesive layer is prepared by coating with a pressure-sensitive adhesive.

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