High-toughness composite PVC film and preparation method thereof

High-toughness composite PVC films are prepared by using specific components and processes, which solves the problem of insufficient strength and toughness of existing films and achieves higher elongation at break and air permeability.

CN121045705APending Publication Date: 2025-12-02JIANGSU DAHAI PLASTIC
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Patent Information

Application Number
CN202511319950.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-16
Publication Date
2025-12-02

AI Technical Summary

Technical Problem

Existing films have low tensile strength and poor barrier properties. Woven bag films lack toughness and have poor moisture and water resistance. The printed patterns are not attractive and they do not have automatic packaging functions.

Method used

High-toughness composite PVC films are prepared by using a specific ratio of PVC resin, oxidized polyethylene wax, silica, aconitine monoester, terephthalic acid, silane coupling agent, EPDM rubber, glyceryl stearate, rare earth stearic acid, and oleamide as raw materials, through stirring, mixing, plasticizing, and extrusion processes.

Benefits of technology

The formation of a stable spatial network structure improves the toughness and breathability of the film, enhances the elongation at break and drop impact strength, and improves the protective performance of the film.

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Abstract

The invention discloses a high-toughness composite PVC film and a preparation method thereof. The high-toughness composite PVC film is prepared from the following components in parts by weight: 62 to 74 parts of PVC resin, 54 to 67 parts of oxidized polyethlene wax, 25 to 35 parts of silicon dioxide, 26 to 39 parts of aconitic acid monoester, 14 to 28 parts of terephthalic acid, 24 to 36 parts of silane coupling agent, 16 to 28 parts of ethylene propylene diene monomer, 14 to 18 parts of glyceryl stearate, 14 to 19 parts of rare earth stearic acid and 16 to 26 parts of oleamide. Compared with a film at the present stage, the PVC film provided by the invention forms a more stable spatial network structure, can further increase the air permeability, can effectively play a supporting effect, has higher toughness, and is mainly embodied in high elongation at break, high falling standard impact strength, improved impact strength and improved air permeability of the film.
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Description

Technical Field

[0001] This invention belongs to the field of PVC film technology, specifically relating to a high-toughness composite PVC film and its preparation method. Background Technology

[0002] There are many types of films available, but their quality varies greatly. Polyethylene films have low tensile strength and poor barrier properties; while woven bag films lack toughness, have poor moisture and water resistance, unattractive printed patterns, and lack barrier properties and automatic packaging functions. Therefore, it is necessary to design a new film with both high strength and good toughness to overcome these problems. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the prior art, the present invention provides a high-toughness composite PVC film and its preparation method.

[0004] Technical solution: A high-toughness composite PVC film, wherein the components and their weight parts of the high-toughness composite PVC film are as follows: 62-74 parts of PVC resin, 54-67 parts of oxidized polyethylene wax, 25-35 parts of silicon dioxide, 26-39 parts of aconitine monoester, 14-28 parts of terephthalic acid, 24-36 parts of silane coupling agent, 16-28 parts of ethylene propylene diene monomer (EPDM) rubber, 14-18 parts of glyceryl stearate, 14-19 parts of rare earth stearic acid, and 16-26 parts of oleamide.

[0005] As an optimization, the components and their weight parts of the high-toughness composite PVC film are as follows: 68 parts of PVC resin, 59 parts of oxidized polyethylene wax, 31 parts of silica, 34 parts of aconitine monoester, 22 parts of terephthalic acid, 32 parts of silane coupling agent, 21 parts of EPDM rubber, 16 parts of glyceryl stearate, 17 parts of rare earth stearic acid, and 19 parts of oleamide.

[0006] A method for preparing a high-toughness composite PVC film includes the following steps:

[0007] Step 1: Add the PVC resin to the mixer according to the components and their weight proportions, and mix thoroughly.

[0008] Step 2: Add oxidized polyethylene wax, silica, aconitine monoester, and terephthalic acid to a mixer and mix evenly with PVC resin to obtain mixture one;

[0009] Step 3: Mixture 1, silane coupling agent, EPDM rubber, glyceryl stearate, rare earth stearic acid, and oleamide are introduced into an internal mixer and mixed to obtain mixture 2;

[0010] Step 4: Pour mixture 2 into the plasticizer for plasticizing;

[0011] Step 5: Feed the plasticized mixture into an extruder, extrude it, and then cool it to form a high-toughness composite PVC film.

[0012] Beneficial effects: Compared with existing films, the PVC film of the present invention forms a more stable spatial network structure, which can further increase air permeability and effectively provide support. It also has higher toughness, mainly manifested in high elongation at break and high drop impact strength, which improves impact strength and air permeability of the film. Detailed Implementation

[0013] The technical solutions in the embodiments of the present invention will be clearly and completely described below, so that those skilled in the art can better understand the advantages and features of the present invention, thereby making a clearer definition of the scope of protection of the present invention. The embodiments described in this invention are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Specific Implementation Example 1

[0015] A high-toughness composite PVC film, wherein the components and their weight parts of the high-toughness composite PVC film are as follows: 62 parts of PVC resin, 54 parts of oxidized polyethylene wax, 25 parts of silicon dioxide, 26 parts of aconitine monoester, 14 parts of terephthalic acid, 24 parts of silane coupling agent, 16 parts of EPDM rubber, 14 parts of glyceryl stearate, 14 parts of rare earth stearic acid, and 16 parts of oleamide.

[0016] A method for preparing a high-toughness composite PVC film includes the following steps:

[0017] Step 1: Add the PVC resin to the mixer according to the components and their weight proportions, and mix thoroughly.

[0018] Step 2: Add oxidized polyethylene wax, silica, aconitine monoester, and terephthalic acid to a mixer and mix evenly with PVC resin to obtain mixture one;

[0019] Step 3: Mixture 1, silane coupling agent, EPDM rubber, glyceryl stearate, rare earth stearic acid, and oleamide are introduced into an internal mixer and mixed to obtain mixture 2;

[0020] Step 4: Pour mixture 2 into the plasticizer for plasticizing;

[0021] Step 5: Feed the plasticized mixture into an extruder, extrude it, and then cool it to form a high-toughness composite PVC film. Specific Implementation Example 2

[0023] A high-toughness composite PVC film, wherein the components and their weight parts of the high-toughness composite PVC film are as follows: 74 parts of PVC resin, 67 parts of oxidized polyethylene wax, 35 parts of silica, 39 parts of aconitine monoester, 28 parts of terephthalic acid, 36 parts of silane coupling agent, 28 parts of ethylene propylene diene monomer (EPDM) rubber, 18 parts of glyceryl stearate, 19 parts of rare earth stearic acid, and 26 parts of oleamide.

[0024] A method for preparing a high-toughness composite PVC film includes the following steps:

[0025] Step 1: Add the PVC resin to the mixer according to the components and their weight proportions, and mix thoroughly.

[0026] Step 2: Add oxidized polyethylene wax, silica, aconitine monoester, and terephthalic acid to a mixer and mix evenly with PVC resin to obtain mixture one;

[0027] Step 3: Mixture 1, silane coupling agent, EPDM rubber, glyceryl stearate, rare earth stearic acid, and oleamide are introduced into an internal mixer and mixed to obtain mixture 2;

[0028] Step 4: Pour mixture 2 into the plasticizer for plasticizing;

[0029] Step 5: Feed the plasticized mixture into an extruder, extrude it, and then cool it to form a high-toughness composite PVC film. Specific Implementation Example 3

[0031] A high-toughness composite PVC film, wherein the components and their weight parts of the high-toughness composite PVC film are as follows: 68 parts of PVC resin, 59 parts of oxidized polyethylene wax, 31 parts of silicon dioxide, 34 parts of aconitine monoester, 22 parts of terephthalic acid, 32 parts of silane coupling agent, 21 parts of ethylene propylene diene monomer (EPDM) rubber, 16 parts of glyceryl stearate, 17 parts of rare earth stearic acid, and 19 parts of oleamide.

[0032] A method for preparing a high-toughness composite PVC film includes the following steps:

[0033] Step 1: Add the PVC resin to the mixer according to the components and their weight proportions, and mix thoroughly.

[0034] Step 2: Add oxidized polyethylene wax, silica, aconitine monoester, and terephthalic acid to a mixer and mix evenly with PVC resin to obtain mixture one;

[0035] Step 3: Mixture 1, silane coupling agent, EPDM rubber, glyceryl stearate, rare earth stearic acid, and oleamide are introduced into an internal mixer and mixed to obtain mixture 2;

[0036] Step 4: Pour mixture 2 into the plasticizer for plasticizing;

[0037] Step 5: Feed the plasticized mixture into an extruder, extrude it, and then cool it to form a high-toughness composite PVC film.

[0038] Compared with existing films, the PVC film of the present invention forms a more stable spatial network structure, which can further increase air permeability and effectively provide support. It also has higher toughness, mainly manifested in high elongation at break and high drop impact strength, which improves impact strength and air permeability of the film.

Claims

1. A high-toughness composite PVC film, characterized in that: The components and their weight percentages of the high-toughness composite PVC film are as follows: 62-74 parts PVC resin, 54-67 parts oxidized polyethylene wax, 25-35 parts silica, 26-39 parts aconitic acid monoester, 14-28 parts terephthalic acid, 24-36 parts silane coupling agent, 16-28 parts ethylene propylene diene monomer (EPDM) rubber, 14-18 parts glyceryl stearate, 14-19 parts rare earth stearic acid, and 16-26 parts oleamide.

2. The high-toughness composite PVC film according to claim 1, characterized in that: The components and their weight parts of the high-toughness composite PVC film are as follows: 68 parts of PVC resin, 59 parts of oxidized polyethylene wax, 31 parts of silicon dioxide, 34 parts of aconitine monoester, 22 parts of terephthalic acid, 32 parts of silane coupling agent, 21 parts of EPDM rubber, 16 parts of glyceryl stearate, 17 parts of rare earth stearic acid, and 19 parts of oleamide.

3. A method for preparing a high-toughness composite PVC film according to claim 1, characterized in that: Includes the following steps: Step 1: Add the PVC resin to the mixer according to the components and their weight proportions, and mix thoroughly. Step 2: Add oxidized polyethylene wax, silica, aconitine monoester, and terephthalic acid to a mixer and mix evenly with PVC resin to obtain mixture one; Step 3: Mixture 1, silane coupling agent, EPDM rubber, glyceryl stearate, rare earth stearic acid, and oleamide are introduced into an internal mixer and mixed to obtain mixture 2; Step 4: Pour mixture 2 into the plasticizer for plasticizing; Step 5: Feed the plasticized mixture into an extruder, extrude it, and then cool it to form a high-toughness composite PVC film.