Anti-corrosion film as well as preparation method and application thereof
By adding raw materials such as molybdenum boride and montmorillonite to PET film, an anti-corrosion film is prepared, which solves the problem of easy corrosion of PET film and achieves excellent anti-corrosion performance, making it suitable for packaging and other fields.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HEBEI YONGXIN PACKING CO LTD
- Filing Date
- 2026-03-13
- Publication Date
- 2026-05-15
AI Technical Summary
PET film is susceptible to corrosion by chemicals such as acids and alkalis, and it is prone to aging in light and heat environments, resulting in insufficient corrosion resistance and limiting its application as a substitute for PVC film materials.
Molybdenum boride and montmorillonite were used as fillers, along with glass fiber, dispersant, and nucleating agent. By adjusting the ratio of each raw material, an anti-corrosion film was prepared, thereby improving its anti-corrosion performance.
The prepared anti-corrosion film showed little change in tensile strength and elongation at break before and after corrosion, exhibiting excellent anti-corrosion properties and making it suitable for industrial production and packaging.
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Abstract
Description
Technical Field
[0001] This invention belongs to the field of thin film technology, specifically relating to an anti-corrosion thin film, its preparation method, and its application. Background Technology
[0002] Polyethylene terephthalate (PET) film is a high-performance thermoplastic film that is widely used in packaging, electronics, new energy and construction due to its excellent physical, chemical and mechanical properties.
[0003] Currently, the PET molecular chain contains a large number of ester structures, making it susceptible to corrosion by acids, alkalis, and other chemicals. Furthermore, these ester structures are prone to aging in light and heat environments, resulting in insufficient corrosion resistance of PET film materials and significantly limiting their replacement of PVC film materials. Existing technologies typically employ blending with corrosion-resistant substances to improve the corrosion resistance of PET film materials, such as inorganic fillers, organosilicon, and light stabilizers. However, the improvement in corrosion resistance remains insignificant. Therefore, how to improve the corrosion resistance of films has become a pressing technical challenge in this field. Summary of the Invention
[0004] The purpose of this invention is to provide an anti-corrosion film, its preparation method, and its application. The anti-corrosion film provided by this invention possesses excellent anti-corrosion properties.
[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution: This invention provides an anti-corrosion film, prepared from the following raw materials in parts by weight: 100 parts PET resin, 1-3 parts filler, 2-6 parts glass fiber, 1-2 parts dispersant, 0.1-0.4 parts slip agent, and 0.1-0.5 parts nucleating agent; The filler includes molybdenum boride and montmorillonite.
[0006] Preferably, the anti-corrosion film is prepared from the following raw materials in parts by weight: 100 parts PET resin, 2 parts filler, 3-5 parts glass fiber, 1-2 parts dispersant, 0.2-0.3 parts slip agent and 0.2-0.4 parts nucleating agent.
[0007] Preferably, the mass ratio of molybdenum boride to montmorillonite is 1:(1~3).
[0008] Preferably, the particle size of the molybdenum boride is 100~300nm.
[0009] Preferably, the mass ratio of the filler to the glass fiber is 1:(1~4).
[0010] Preferably, the dispersant is at least one selected from silane coupling agent, lauryl alcohol polyoxyethylene ether, sodium dodecyl sulfate, sodium dodecylbenzene sulfonate, and sodium stearate.
[0011] Preferably, when the dispersant is a silane coupling agent and sodium dodecyl sulfate, the mass ratio of the silane coupling agent to sodium dodecyl sulfate is (2~5):1.
[0012] Preferably, the slip agent is stearamide.
[0013] The present invention also provides a method for preparing the anti-corrosion film described in the above technical solution, comprising: PET resin, filler, glass fiber, dispersant, slip agent and nucleating agent are mixed, and then granulated and film-formed in sequence to obtain an anti-corrosion film.
[0014] The present invention also provides the application of the anti-corrosion film described above in packaging.
[0015] This invention provides an anti-corrosion film prepared from the following raw materials in parts by weight: 100 parts PET resin, 1-3 parts filler, 2-6 parts glass fiber, 1-2 parts dispersant, 0.1-0.4 parts slip agent, and 0.1-0.5 parts nucleating agent; the filler includes molybdenum boride and montmorillonite. This invention uses molybdenum boride and montmorillonite as fillers, which synergistically improve the corrosion resistance of the film; the addition of glass fiber further enhances the corrosion resistance; and adjusting the proportions of each raw material can further improve the corrosion resistance. Experimental results show that the tensile strength and elongation at break of the anti-corrosion film provided by this invention do not change significantly before and after corrosion, indicating excellent corrosion resistance. Detailed Implementation
[0016] This invention provides an anti-corrosion film, prepared from the following raw materials in parts by weight: 100 parts PET resin, 1-3 parts filler, 2-6 parts glass fiber, 1-2 parts dispersant, 0.1-0.4 parts slip agent, and 0.1-0.5 parts nucleating agent; The filler includes molybdenum boride and montmorillonite.
[0017] This invention does not impose any special restrictions on the source of the raw materials; commercially available products familiar to those skilled in the art can be used.
[0018] The raw materials for preparing the anti-corrosion film of the present invention include 100 parts by weight. In the present invention, the PET is the matrix material.
[0019] Based on 100 parts by weight of PET, the raw materials for preparing the anti-corrosion film of the present invention also include 1 to 3 parts by weight of filler. In one embodiment, the filler may be 2 parts by weight. In the present invention, the filler can improve the corrosion resistance of the film.
[0020] In this invention, the filler comprises molybdenum boride and montmorillonite; the preferred mass ratio of molybdenum boride to montmorillonite is 1:(1~3). As one embodiment, the mass ratio of molybdenum boride to montmorillonite can be 1:2. Limiting the mass ratio of molybdenum boride to montmorillonite within the above range further improves the corrosion resistance of the film.
[0021] In this invention, the particle size of the molybdenum boride is preferably 100~300 nm.
[0022] This invention does not impose any special limitation on the particle size of the montmorillonite; any montmorillonite well-known to those skilled in the art can be used. As one embodiment, the montmorillonite can be produced by Aladdin, CAS number 1318-93-0.
[0023] Based on 100 parts by weight of PET, the raw materials for preparing the anti-corrosion film of the present invention also include 2 to 6 parts by weight of glass fiber. As one embodiment, the glass fiber may be 3, 4, or 5 parts by weight. In the present invention, the glass fiber can improve the corrosion resistance of the film.
[0024] In this invention, the diameter of the glass fiber is preferably 9-13 μm; the length of the glass fiber is preferably 3-25 mm. As one embodiment, the diameter of the glass fiber can be 10 μm, 11 μm, or 12 μm; the length of the glass fiber can be 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, or 24 mm.
[0025] In this invention, the preferred mass ratio of the filler to glass fiber is 1:(1~4). As one embodiment, the mass ratio of the filler to glass fiber can be 1:2 or 1:3. Limiting the mass ratio of the filler to glass fiber within the above range further improves the corrosion resistance of the film.
[0026] Based on 100 parts by weight of PET, the raw materials for preparing the anti-corrosion film of the present invention also include 1-2 parts of dispersant; the dispersant is preferably at least one selected from silane coupling agent, lauryl alcohol polyoxyethylene ether, sodium dodecyl sulfate, sodium dodecylbenzene sulfonate, and sodium stearate. The use of a dispersant in the present invention can improve the dispersibility of fillers and glass fibers, thereby further improving the anti-corrosion performance of the film.
[0027] The present invention does not have any particular limitation on the type of silane coupling agent, and any silane coupling agent well known to those skilled in the art can be used.
[0028] In one embodiment, the silane coupling agent may be vinyltriethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, KH-550, or KH-560.
[0029] In this invention, when the dispersant is a silane coupling agent and sodium dodecyl sulfate, the preferred mass ratio of the silane coupling agent to sodium dodecyl sulfate is (2~5):1. As one embodiment, the mass ratio of the silane coupling agent to sodium dodecyl sulfate can be 3:1 or 4:1. Limiting the mass ratio of the silane coupling agent to sodium dodecyl sulfate within the above range further improves the dispersion effect of the dispersant, thereby further improving the corrosion resistance of the film.
[0030] Based on 100 parts by weight of PET, the raw materials for preparing the anti-corrosion film of the present invention further include 0.1 to 0.4 parts by weight of a slip agent; the slip agent is preferably stearamide. As one embodiment, the slip agent may be 0.2 or 0.3 parts by weight.
[0031] Based on 100 parts by weight of PET, the raw materials for preparing the anti-corrosion film of the present invention also include 0.1 to 0.5 parts by weight of a nucleating agent. As one embodiment, the nucleating agent may be 0.2, 0.3, or 0.4 parts by weight.
[0032] The present invention does not have a specific limitation on the type of nucleating agent, and any nucleating agent well known to those skilled in the art can be used.
[0033] This invention uses molybdenum boride and montmorillonite as fillers, which can synergistically improve the corrosion resistance of the film; and the addition of glass fiber can further improve the corrosion resistance of the film; by adjusting the ratio of each raw material, the corrosion resistance of the film can be further improved.
[0034] The present invention also provides a method for preparing the anti-corrosion film described in the above technical solution, comprising: PET resin, filler, glass fiber, dispersant, slip agent and nucleating agent are mixed, and then granulated and film-formed in sequence to obtain an anti-corrosion film.
[0035] The present invention does not impose any special limitations on the mixing operation of the PET resin, filler, glass fiber, dispersant, slip agent and nucleating agent, and any technical solution for preparing the mixture well known to those skilled in the art can be used.
[0036] The present invention does not impose any special limitations on the granulation operation; any operation known to those skilled in the art can be used.
[0037] The present invention does not impose any particular limitation on the film-forming operation; any operation well known to those skilled in the art can be used. As one embodiment, the film-forming operation may involve first extruding a cast sheet, calendering it into a preform, and then stretching it into a film.
[0038] The preparation method provided by this invention is simple and suitable for industrial production.
[0039] The present invention also provides the application of the anti-corrosion film described above in packaging.
[0040] The present invention does not impose any special limitations on the operation of the anti-corrosion film in packaging; any operation familiar to those skilled in the art can be used.
[0041] The technical solutions of this invention will be clearly and completely described below with reference to the embodiments thereof. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.
[0042] The molybdenum boride used in the examples and comparative examples was produced by Hebei Tengbimetallic Materials Co., Ltd. Montmorillonite is produced by Aladdin, CAS number 1318-93-0; The nucleating agent is Sanwell PET nucleating agent HK195; The PET resin is a TRN-RTJ type resin.
[0043] Example 1 The anti-corrosion film is prepared from the following raw materials in parts by weight: 100 parts PET resin, 1 part filler, 2 parts glass fiber, 1 part dispersant, 0.4 parts slip agent and 0.1 parts nucleating agent; The filler is molybdenum boride and montmorillonite; The mass ratio of molybdenum boride to montmorillonite is 1:1; The particle size of the molybdenum boride is 100~300nm; The glass fiber has a diameter of 9~13μm and a length of 10~15mm; The mass ratio of the filler to the glass fiber is 1:2; The dispersant is silane coupling agent KH-550; The slip agent is stearamide; The method for preparing the anti-corrosion film is as follows: PET resin, filler, glass fiber, dispersant, slip agent and nucleating agent are mixed and then transferred to a mixing kettle and mixed at 260°C for 50 minutes. The mixture is then discharged and granulated to obtain granules. The granules are melted and extruded at 280℃ to form a blank, which is then rolled into a blank film with a thickness of 0.3 mm. The blank film is then stretched and shaped, with the stretching ratio controlled at 3.5, to obtain an anti-corrosion film.
[0044] Comparative Example 1 Based on Example 1, the filler was set as montmorillonite, while other conditions remained unchanged.
[0045] Comparative Example 2 Based on Example 1, the filler was changed to molybdenum boride, while other conditions remained unchanged.
[0046] The films prepared in Example 1 and Comparative Examples 1-2 were subjected to tests for resistance to dielectric corrosion and resistance to aging corrosion, as detailed below: Resistance to media corrosion: Prepare 10% sodium hydroxide aqueous solution, 10% sulfuric acid aqueous solution, 20% sodium chloride aqueous solution and 50% ethanol aqueous solution respectively. Take samples and place them in the corrosive solution, soak them at room temperature for 24 hours, rinse them three times and dry them. Tensile tests were conducted on the samples before and after corrosion in accordance with the GB / T1040.1-2018 standard. The corrosion resistance of the film was characterized by the change rate of tensile strength Δh and the change rate of elongation at break Δs. The specific test results are shown in Table 1 ("-" in the table indicates a decrease in performance).
[0047] Table 1. Corrosion resistance data of the films prepared in Example 1 and Comparative Examples 1-2.
[0048] As can be seen from Table 1, omitting any of the fillers will lead to a decrease in corrosion resistance, further demonstrating that molybdenum boride and montmorillonite can synergistically improve the corrosion resistance of the film.
[0049] Example 2 Based on Example 1, the mass ratio of molybdenum boride to montmorillonite was modified to 1:2, while other conditions remained unchanged.
[0050] Example 3 Based on Example 1, the mass ratio of molybdenum boride to montmorillonite was modified to 1:3, while other conditions remained unchanged.
[0051] Comparative Example 3 Based on Example 1, the mass ratio of molybdenum boride to montmorillonite was modified to 1:5, while other conditions remained unchanged.
[0052] Comparative Example 4 Based on Example 1, the mass ratio of molybdenum boride to montmorillonite was modified to 1:0.5, while other conditions remained unchanged.
[0053] The corrosion resistance of the films prepared in Examples 1-3 and Comparative Examples 3-4 were tested according to the aforementioned test methods, and the results are shown in Table 2.
[0054] Table 2. Corrosion resistance data of the films prepared in Examples 1-3 and Comparative Examples 3-4.
[0055] As can be seen from Table 2, the present invention can further improve the corrosion resistance of the film by limiting the mass ratio of molybdenum boride and montmorillonite.
[0056] Example 4 Based on Example 1, the content of glass fiber was set to 3 parts, that is, the mass ratio of filler to glass fiber was 1:3, and other conditions remained unchanged.
[0057] Example 5 Based on Example 1, the content of glass fiber was set to 4 parts, that is, the mass ratio of filler to glass fiber was 1:4, and other conditions remained unchanged.
[0058] The corrosion resistance of the films prepared in Examples 1 and 4-5 were tested according to the aforementioned test method, and the results are shown in Table 3.
[0059] Table 3. Corrosion resistance data of the films prepared in Examples 1 and 4-5.
[0060] As can be seen from Table 3, the present invention can further improve the corrosion resistance of the film by limiting the mass ratio of filler and glass fiber.
[0061] Example 6 Based on Example 1, when the dispersant is set as silane coupling agent KH-550 and sodium dodecyl sulfate, the mass ratio of the silane coupling agent to sodium dodecyl sulfate is 2:1, and other conditions remain unchanged.
[0062] Example 7 Based on Example 1, when the dispersant is set as silane coupling agent KH-550 and sodium dodecyl sulfate, the mass ratio of the silane coupling agent to sodium dodecyl sulfate is 3:1, and other conditions remain unchanged.
[0063] Example 8 Based on Example 1, when the dispersant is set as silane coupling agent KH-550 and sodium dodecyl sulfate, the mass ratio of the silane coupling agent to sodium dodecyl sulfate is 4:1, and other conditions remain unchanged.
[0064] Example 9 Based on Example 1, when the dispersant is set as silane coupling agent KH-550 and sodium dodecyl sulfate, the mass ratio of the silane coupling agent to sodium dodecyl sulfate is 5:1, and other conditions remain unchanged.
[0065] The corrosion resistance of the films prepared in Examples 1 and 6-9 were tested according to the aforementioned test method, and the results are shown in Table 4.
[0066] Table 4. Corrosion resistance data of the films prepared in Examples 1 and 6-9.
[0067] As can be seen from Table 4, the present invention can further improve the corrosion resistance of the film by limiting the mass ratio of silane coupling agent and sodium dodecyl sulfate.
[0068] Example 10 The anti-corrosion film was prepared from the following parts by weight of raw materials: 100 parts of PET resin, 3 parts of filler, 6 parts of glass fiber, 2 parts of dispersant, 0.1 parts of slip agent and 0.5 parts of nucleating agent, with other conditions the same as in Example 1.
[0069] Example 11 The anti-corrosion film was prepared from the following parts by weight of raw materials: 100 parts of PET resin, 2 parts of filler, 4 parts of glass fiber, 2 parts of dispersant, 0.3 parts of slip agent and 0.3 parts of nucleating agent, with other conditions the same as in Example 1.
[0070] The corrosion resistance of the films prepared in Examples 10-11 was tested according to the aforementioned test method, and the results are shown in Table 5.
[0071] Table 5. Corrosion resistance data of the films prepared in Examples 10-11
[0072] As can be seen from Table 5, the present invention can improve the corrosion resistance of the film.
[0073] As can be seen from the above embodiments and comparative examples, the anti-corrosion film provided by the present invention has excellent anti-corrosion performance.
[0074] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.
Claims
1. A corrosion-resistant film, characterized in that, It is prepared from the following raw materials in parts by weight: 100 parts PET resin, 1-3 parts filler, 2-6 parts glass fiber, 1-2 parts dispersant, 0.1-0.4 parts slip agent and 0.1-0.5 parts nucleating agent; The filler includes molybdenum boride and montmorillonite.
2. The anti-corrosion film according to claim 1, characterized in that, The anti-corrosion film is prepared from the following raw materials in parts by weight: 100 parts PET resin, 2 parts filler, 3-5 parts glass fiber, 1-2 parts dispersant, 0.2-0.3 parts slip agent and 0.2-0.4 parts nucleating agent.
3. The anti-corrosion film according to claim 1 or 2, characterized in that, The mass ratio of molybdenum boride to montmorillonite is 1:(1~3).
4. The anti-corrosion film according to claim 1 or 2, characterized in that, The particle size of the molybdenum boride is 100~300nm.
5. The anti-corrosion film according to claim 1, characterized in that, The mass ratio of the filler to the glass fiber is 1:(1~4).
6. The anti-corrosion film according to claim 1, characterized in that, The dispersant is at least one of silane coupling agent, lauryl alcohol polyoxyethylene ether, sodium dodecyl sulfate, sodium dodecylbenzene sulfonate, and sodium stearate.
7. The anti-corrosion film according to claim 6, characterized in that, When the dispersant is a silane coupling agent and sodium dodecyl sulfate, the mass ratio of the silane coupling agent to sodium dodecyl sulfate is (2~5):
1.
8. The anti-corrosion film according to claim 1 or 2, characterized in that, The slip agent is stearamide.
9. A method for preparing the anti-corrosion film according to any one of claims 1 to 8, characterized in that, include: PET resin, filler, glass fiber, dispersant, slip agent and nucleating agent are mixed, and then granulated and film-formed in sequence to obtain an anti-corrosion film.
10. The application of the anti-corrosion film according to any one of claims 1 to 8 in packaging.