High-barrier PVC sheet

Abstract

The utility model relates to the technical field of PVC (polyvinyl chloride) sheets, and discloses a high-barrier PVC sheet, which comprises a base layer, a barrier layer arranged at the top of the base layer and used for improving the barrier property of the PVC sheet, and a composite layer arranged at the top of the barrier layer, the composite layer consists of an anti-aging layer and a stable layer, the surface of the base layer is coated with the barrier layer, and the surface of the base layer is coated with the stable layer. The high-barrier PVC sheet comprises a base layer and a barrier layer, the base layer is prepared by melting a PVC material and ceramic powder, the barrier layer is a barrier agent, and a convex part is arranged on the surface of the base layer, according to the high-barrier PVC sheet, through the base layer prepared from the PVC material and the ceramic powder, the barrier property of a PVC material body can be improved, and through the convex part arranged on the surface of the base layer, when the base layer is coated with the barrier agent, the barrier property of the base layer is improved. According to the PVC sheet, the contact area of the blocking agent and the base layer can be effectively increased, so that the blocking performance of the PVC sheet is improved, the composite layer brushed on the side, away from the base layer, of the blocking agent can protect the blocking layer to a certain degree, and the blocking layer is prevented from falling off for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of PVC sheets, in particular to a high-barrier PVC sheet. Background Art

[0002] Polyvinyl chloride, or PVC for short, is the third largest synthetic polymer plastic in the world (after polyethylene and polypropylene), with about 40 million tons of PVC produced each year. PVC is a polymer formed by the polymerization of vinyl chloride monomer (VCM) in the presence of initiators such as peroxides and azo compounds or under the action of light or heat according to the free radical polymerization mechanism. Vinyl chloride homopolymers and vinyl chloride copolymers are collectively referred to as vinyl chloride resins. PVC was once the world's largest general-purpose plastic with a very wide range of applications. PVC comes in two types: hard and soft. Hard polyvinyl chloride is used for building pipes, doors and windows. It is also used to make plastic bottles, packaging, bank cards or membership cards. Adding plasticizers can make PVC softer and more flexible. It can be used for pipes, cable insulation, flooring, signs, phonograph records, inflatable products and rubber substitutes.

[0003] In order to improve the barrier performance of the currently used PVC sheets, barrier agents are conventionally coated on the PVC sheets to improve the barrier performance of the PVC sheets. However, with long-term use, the stability of the PVC sheets becomes problematic, and the barrier agents coated on the PVC surface are detached, affecting its normal barrier performance and easily aging. For this reason, we propose a high-barrier PVC sheet. Utility Model Content

[0004] The purpose of the utility model is to provide a high barrier PVC sheet to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-barrier PVC sheet, comprising a base layer;

[0006] A barrier layer disposed on top of the base layer for improving the barrier performance of the PVC sheet;

[0007] and a composite layer arranged on the top of the barrier layer, wherein the composite layer consists of an anti-aging layer and a stabilizing layer.

[0008] Preferably, the surface of the base layer is coated with a barrier layer, the base layer is made by melting PVC material and ceramic powder, the barrier layer is a barrier agent, and the barrier agent is EVOH. EVOH is a material with high barrier properties that can effectively block the penetration of oxygen and volatile organic compounds, thereby improving the barrier properties of the PVC sheet.

[0009] Preferably, the surface of the base layer is provided with raised portions, and the raised portions provided on the surface of the base layer can increase the contact area between the barrier layer and the base layer, thereby further improving the barrier effect.

[0010] Preferably, the raised portion on the surface of the base layer is wavy, and the contact area between the base layer and the stabilizing layer can be effectively increased by the wavy-shaped raised portion.

[0011] Preferably, the stabilizing layer is coated on the top of the barrier layer, and an anti-aging layer is coated on the top of the stabilizing layer. The anti-aging layer is an antioxidant. Adding an antioxidant can effectively slow down the aging speed of the PVC sheet. The stabilizing layer is a heat stabilizer. Adding a heat stabilizer can improve the stability of the PVC sheet under high temperature conditions, further improving the overall flame retardant properties of the PVC sheet.

[0012] Preferably, the barrier layer and the composite layer are provided in two groups, and the two groups of barrier layers and the composite layers are symmetrically arranged with the center line of the base layer as the symmetry axis.

[0013] Compared with the prior art, the utility model provides a high barrier PVC sheet material, which has the following beneficial effects:

[0014] 1. The high-barrier PVC sheet can improve the barrier properties of the PVC material body through the base layer made of PVC material and ceramic powder, and through the raised parts set on the surface of the base layer, when the barrier agent is brushed on the base layer, the contact area between the barrier agent and the base layer can be effectively increased, thereby improving the barrier properties of the PVC sheet. The composite layer brushed on the side of the barrier agent away from the base layer can protect the barrier layer to a certain extent, avoiding the barrier layer from falling off due to a long period of time.

[0015] 2. The high-barrier PVC sheet, through the composite layer, can not only protect the barrier layer, but also delay the aging speed of the PVC sheet, and can improve the stability of the PVC sheet under high temperature conditions, further improving the overall flame retardant performance of the PVC sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the high barrier PVC sheet of the utility model;

[0017] Figure 2 It is a schematic diagram of the base structure of the utility model.

[0018] In the figure: 1, base layer; 101, raised portion; 2, barrier layer; 3, composite layer; 31, anti-aging layer; 32, stabilizing layer. DETAILED DESCRIPTION

[0019] like Figure 1-Figure 2As shown, the utility model provides a technical solution: a high-barrier PVC sheet, comprising a base layer 1, a barrier layer 2 for improving the barrier performance of the PVC sheet is arranged on the top of the base layer 1, a composite layer 3 is arranged on the top of the barrier layer 2, the composite layer 3 is composed of an anti-aging layer 31 and a stabilization layer 32, the barrier layer 2 and the composite layer 3 are each provided with two groups, and the two groups of barrier layers 2 and composite layers 3 are symmetrically arranged with the center line of the base layer 1 as the symmetry axis, and the composite layer 3 coated on the surface of the barrier layer 2 can protect the barrier layer 2, and can effectively prevent the barrier layer 2 from detaching due to long-term use, thereby affecting the barrier performance of the PVC sheet.

[0020] The surface of the base layer 1 is coated with a barrier layer 2. The base layer 1 is made by melting PVC material and ceramic powder. The barrier layer 2 is a barrier agent, and the barrier agent is EVOH. EVOH is a material with high barrier properties, which can effectively block the penetration of oxygen and volatile organic compounds and improve the barrier properties of the PVC sheet. The PVC material and the ceramic powder are fused, and the ceramic powder is added to the molten PVC material, mixed by an extruder, and then added to a mold. Adding ceramic powder to the PVC material can improve the barrier properties of the PVC material.

[0021] The surface of the base layer 1 is provided with a raised portion 101. The raised portion 101 provided on the surface of the base layer 1 can increase the contact area between the barrier layer 2 and the base layer 1, thereby further improving the barrier effect. The raised portion 101 on the surface of the base layer 1 is wavy. The raised portion 101 with a wavy design can effectively increase the contact area between the base layer 1 and the stabilization layer 32.

[0022] The stabilizing layer 32 is coated on the top of the barrier layer 2, and the anti-aging layer 31 is coated on the top of the stabilizing layer 32. The anti-aging layer 31 is an antioxidant. Adding an antioxidant can effectively slow down the aging speed of the PVC sheet. The stabilizing layer 32 is a heat stabilizer. Adding a heat stabilizer can improve the stability of the PVC sheet under high temperature conditions, thereby further improving the overall flame retardant properties of the PVC sheet.

[0023] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A high barrier PVC sheet, comprising a base layer (1); Features: A barrier layer (2) disposed on top of the base layer (1) for improving the barrier properties of the PVC sheet; and a composite layer (3) arranged on the top of the barrier layer (2), wherein the composite layer (3) consists of an anti-aging layer (31) and a stabilizing layer (32).

2. A high barrier PVC sheet according to claim 1, characterized in that: The surface of the base layer (1) is provided with a convex portion (101).

3. A high barrier PVC sheet according to claim 2, characterized in that: The raised portion (101) on the surface of the base layer (1) is wavy.

4. The high barrier PVC sheet according to claim 1, characterized in that: The stabilizing layer (32) is coated on the top of the barrier layer (2), and the top of the stabilizing layer (32) is coated with an anti-aging layer (31).

5. The high barrier PVC sheet according to claim 1, characterized in that: The barrier layer (2) and the composite layer (3) are both provided in two groups, and the two groups of barrier layers (2) and composite layers (3) are both symmetrically arranged with the center line of the base layer (1) as the symmetry axis.

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