An acid-resistant PVC composition and its application

Abstract

The present invention relates to the field of semiconductor technology, and particularly to an acid-resistant PVC composition and its application. It includes a PVC film. By mass parts, the raw materials for preparing the PVC film include: 90-110 parts of modified PVC powder, 4-6 parts of calcium carbonate powder, 20-30 parts of DOP, 3-7 parts of epoxy soybean oil, 2-3 parts of liquid barium-zinc stabilizer 105, 0.2-0.5 parts of powder barium-zinc stabilizer, and 0.1-1.0 parts of amine compound. The present invention provides an acid-resistant film, which does not have the problem of acid leakage under the test of 18% concentration HF for 20 hours. The acid-resistant film has good adhesiveness and acid resistance, good overall stability and no residual adhesive after use. The present invention provides a systematic product, and mixing the film and the adhesive to obtain a composition with excellent bonding performance and no residue.

Description

Technical Field

[0001] The present invention relates to the field of semiconductor technology, and particularly to an acid-resistant PVC composition and its application. Background Art

[0002] Glass etching and thinning is a processing technology for reducing the thickness of glass by chemical or physical means, and is commonly used in fields such as electronic devices, optical equipment, display screens, etc. This process can be achieved through chemical etching, mechanical grinding or laser technology, and the specific method varies according to application requirements.

[0003] Chemical etching: Utilize the chemical reaction between an acidic or alkaline solution and the glass surface to dissolve the materials on the glass surface layer by layer, gradually reducing the glass thickness.

[0004] Common chemicals: Hydrofluoric acid (HF): Commonly used for chemical etching of glass, capable of effectively dissolving silicon dioxide (SiO 2 ) glass. Hydrogen fluoride gas (HF gas): Can also be used for gas-phase etching of glass, commonly used in more precise etching scenarios. Advantages: The etching process is mild, suitable for processing large areas or thin glass, and can achieve high-precision thickness control. Disadvantages: The chemicals are corrosive and toxic, and strict protective measures are required during the operation. Chemical etching is suitable for occasions that require fine processing and have high requirements for surface roughness.

[0005] An acid-resistant film is a thin film material that can resist corrosion in an acidic environment and is commonly used to protect the material surface from being eroded by acidic substances. Acid-resistant films are usually applied in fields such as chemical equipment, storage tanks, pipelines, building materials, etc., especially in environments where acidic gases or liquids exist. Performance requirements for acid-resistant films: Chemical corrosion resistance: Can effectively resist the erosion of various acidic substances (such as sulfuric acid, hydrochloric acid, hydrofluoric acid, etc.). Good mechanical strength: When exposed to an acidic environment, the film material still needs to maintain its structural integrity. Thermal stability: Many acidic reaction environments are accompanied by high temperatures, and the acid-resistant film needs to have a certain degree of heat resistance. Durability and anti-aging properties: When exposed to acidic conditions for a long time, the film material should have good anti-aging ability.

[0006] Polyvinyl chloride (PVC) has certain acid resistance, especially performing well in a low-concentration acidic environment. However, its acid resistance will weaken when facing high-concentration acids, strongly oxidizing acids, or high-temperature acidic environments. PVC has good tolerance in a low-concentration inorganic acid (such as hydrochloric acid, sulfuric acid, nitric acid) environment and is not easily corroded or degraded. Therefore, it is often used in pipes and containers for handling or storing dilute acidic solutions. For some weak acids, such as acetic acid and citric acid, PVC also has good tolerance and can maintain its mechanical and physical properties for a long time. When facing high-concentration strong acids (such as concentrated sulfuric acid and concentrated nitric acid), PVC has poor acid resistance. These acids will accelerate the degradation of PVC at higher temperatures, resulting in structural damage to the material and a decline in mechanical properties. PVC is not resistant to strongly oxidizing acids (such as fuming sulfuric acid and concentrated nitric acid) and certain mixed acids (such as aqua regia). Oxidizing acids not only corrode PVC but may also cause PVC to decompose and release toxic gases.

[0007] In view of the above phenomena, the present invention provides an acid-resistant PVC composition and its application. Summary of the Invention

[0008] To solve the above technical problems, the present invention provides an acid-resistant PVC composition, which comprises a PVC film. By mass, the raw materials for preparing the PVC film include:

[0009] 90 - 110 parts of modified PVC powder

[0010] 4 - 6 parts of calcium carbonate powder

[0011] 20 - 30 parts of DOP

[0012] 3 - 7 parts of epoxidized soybean oil

[0013] 2 - 3 parts of liquid barium-zinc stabilizer 105

[0014] 0.2 - 0.5 parts of powder barium-zinc stabilizer

[0015] 0.1 - 1.0 part of amine compound.

[0016] As an implementation manner of the present invention, the preparation method of the modified PVC powder is as follows:

[0017] Dry mix PVC resin and PVDF resin in a drying mixer according to a mass ratio of 8:1, with a mixing time of 10 - 15 minutes; the mixing temperature is 50 - 60°C;

[0018] Put the pre-mixed powder into a twin-screw extruder for melt blending; the extrusion temperature is 170°C - 210°C; the screw speed is 60 - 100 rpm;

[0019] The material after melt blending is extruded into strips through the die head of an extruder, and then enters a cooling water tank for rapid cooling and shaping. The material after cooling and shaping is cut into granular modified PVC products by a pelletizer.

[0020] As an embodiment of the present invention, the particle size of the calcium carbonate powder is 1500 - 2000 mesh.

[0021] As an embodiment of the present invention, the amine compound is selected from one or more of tert-butylamine, isopropylamine, 2-ethylhexylamine, isobutylamine, triethanolamine, diisopropylamine, N-tert-butylethylenediamine, 2-amino-2-methyl-1-propanol, N,N-diisooctylamine, N,N-diisopropylethylamine, and 2-tert-butylpropylamine.

[0022] As an embodiment of the present invention, the amine compound contains N,N-diisooctylamine and N,N-diisopropylethylamine, and the mass ratio is 3:1.

[0023] As an embodiment of the present invention, the preparation method of the PVC film is as follows:

[0024] ① Mix the raw materials for preparing the PVC film and send them into a kneader for pre-plasticization, then transport them to an extruder for repeated plasticization; after continuous calendering, a film with a certain thickness is obtained, and then it is led out by a take-off roll;

[0025] ② Cool and solidify the film in a film cooler, and maintain its required shape and properties;

[0026] ③ After the semi-finished product is detected to be qualified, it is cut by a trimming machine to obtain the required width and length; then the film is wound into a roll by a coiler.

[0027] As an embodiment of the present invention, an adhesive layer and a release layer are also provided on the PVC film.

[0028] As an embodiment of the present invention, the raw material for preparing the adhesive layer is silicone rubber.

[0029] As an embodiment of the present invention, an acid-resistant PVC film is prepared from the composition described above.

[0030] As an embodiment of the present invention, the PVC film is applied to the field of glass etching.

[0031] Adopting the above technical solutions, the present invention has the following beneficial effects:

[0032] The present invention provides an acid-resistant film which does not have the problem of acid leakage under the test conditions of 18% concentration HF and 20H testing (12H testing is the basic requirement of the industry, and 20H testing is the extreme requirement of the industry). The acid-resistant film has good adhesiveness, acid resistance, good overall stability and no residual adhesive after use. The present invention provides a systematic product, and a composition with excellent bonding performance and no residue is obtained by mixing a thin film and an adhesive. Detailed Embodiments

[0033] The technical solutions of the present invention will be described clearly and completely below. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] The present invention provides an acid-resistant PVC film resistant to acid corrosion, which comprises a PVC film, an adhesive, and a release layer. By mass, the preparation raw materials of the PVC film comprise:

[0035] 100 parts of modified PVC powder

[0036] 5 parts of calcium carbonate powder

[0037] 25 parts of DOP

[0038] 5 parts of epoxidized soybean oil

[0039] 2.5 parts of liquid barium-zinc stabilizer 105

[0040] 0.3 part of powder barium-zinc stabilizer

[0041] 0.8 part of amine compound.

[0042] The preparation method of the modified PVC powder is as follows:

[0043] The PVC resin and the PVDF resin are dry-blended in a dry mixer according to a mass ratio of 8:1, and the mixing time is 10 to 15 minutes; the mixing temperature is 50 to 60 °C;

[0044] The pre-mixed powder is put into a twin-screw extruder for melt blending; the extrusion temperature is 170 °C to 210 °C; the screw speed is 60 to 100 rpm;

[0045] The melt-blended material is extruded into strips through the die head of the extruder, and then enters a cooling water tank for rapid cooling and shaping. The shaped material is cut into granular modified PVC products by a granulator.

[0046] The particle size of the calcium carbonate powder is 2000 mesh.

[0047] The amine compound includes N,N-diisooctylamine (dioctylamine) and N,N-diisopropylethylamine, and the mass ratio is 3:1.

[0048] As an implementation manner of the present invention, the preparation method of the PVC film is as follows:

[0049] ① Mix the raw materials for preparing the PVC film and send them into a kneader for pre-plasticization, then transport them to an extruder for repeated plasticization; after continuous calendering, a film with a certain thickness is obtained, and then it is led out by a take-off roll;

[0050] ② Cool and solidify the film in a film cooler, and maintain its required shape and performance;

[0051] ③ After the semi-finished product is qualified through inspection, it is cut by a trimming machine to obtain the required width and length; then the film is wound into a roll by a coiler.

[0052] The raw material for preparing the adhesive layer is Wacker Elastosil A07 silicone rubber.

[0053] The release layer is a PET release film.

[0054] The thickness of the base film is 90 microns. The thickness of the adhesive layer is 15 microns. The thickness of the release layer is 50 microns.

[0055] The preparation method of the PVC acid-resistant film: Cut an appropriate size of the PVC film, coat the adhesive layer material on the surface of the base film, then dry it, and then bond the release layer material to obtain the PVC acid-resistant film.

[0056] A large number of chlorine atoms are contained in the molecular chain of PVC, which makes it relatively unstable in some acidic environments. Especially when contacting certain strong acids (such as concentrated sulfuric acid and concentrated nitric acid), the acid will act on the chlorine atoms in PVC, resulting in the decomposition of PVC. PVC usually improves its flexibility by adding plasticizers, but these plasticizers may react with acids in an acidic environment, resulting in the decomposition or loss of the plasticizers. The loss of plasticizers will make PVC become brittle and hardened, making it easier to crack or be eroded by acids. For this reason, the inventor found that the product obtained by modifying PVC is acid-resistant, but its surface is smoother after modification, which is likely to increase the bonding difficulty of the adhesive; at the same time, it is easy to increase the penetration of the acidic solvent between the film layer and the adhesive layer during etching; for this reason, adding an amine compound to the raw materials in the present invention can obtain a better bonding effect.

[0057] The following further explains and illustrates the present invention in combination with specific implementation manners.

[0058] Example 1

[0059] This embodiment provides an acid-resistant PVC anti-acid film, which comprises a PVC film, an adhesive, and a release layer. By mass, the raw materials for preparing the PVC film include:

[0060] 100 parts of modified PVC powder

[0061] 5 parts of calcium carbonate powder

[0062] 25 parts of DOP

[0063] 5 parts of epoxidized soybean oil

[0064] 2.5 parts of liquid barium-zinc stabilizer 105

[0065] 0.3 part of powder barium-zinc stabilizer

[0066] 0.8 part of amine compound.

[0067] The preparation method of the modified PVC powder is as follows:

[0068] Dry blend PVC resin and PVDF resin in a drying mixer at a mass ratio of 8:1 for 15 minutes; the mixing temperature is 60°C;

[0069] Put the pre-mixed powder into a twin-screw extruder for melt blending; the extrusion temperature is 200°C; the screw speed is 100 rpm;

[0070] The melt-blended material is extruded into strips through the die head of the extruder, and then enters the cooling water tank for rapid cooling and shaping. The shaped material is cut into granular modified PVC products by a pelletizer.

[0071] The particle size of the calcium carbonate powder is 2000 mesh.

[0072] The amine compound includes N,N-diisooctylamine (dioctylamine) and N,N-diisopropylethylamine, and the mass ratio is 3:1.

[0073] The preparation method of the PVC film is as follows:

[0074] ① Mix the raw materials for preparing the PVC film and send them into a kneader for pre-plasticization, and then transport them to an extruder for repeated plasticization; after continuous calendering, a film with a certain thickness is obtained, and then it is led out by a take-off roll;

[0075] ② Cool and solidify the film in a film cooler, and maintain its required shape and performance;

[0076] ③ After the semi-finished product is inspected and qualified, it is cut by a trimming machine to obtain the required width and length; then the film is wound into a roll by a coiler.

[0077] The raw materials for preparing the adhesive layer are Wacker Elastosil A07 silicone adhesive.

[0078] The release layer is a PET release film.

[0079] The thickness of the base film is 90 microns. The thickness of the adhesive layer is 15 microns. The thickness of the release layer is 50 microns.

[0080] The preparation method of the PVC acid-resistant film: Cut a suitable size of PVC film, coat the adhesive layer material on the surface of the base film, then dry it, and then laminate the release layer material to obtain the PVC acid-resistant film.

[0081] Example 2

[0082] This example provides an acid-resistant PVC acid-resistant film, which includes a PVC film, an adhesive, and a release layer. By mass, the raw materials for preparing the PVC film include:

[0083] 100 parts of PVC powder

[0084] 5 parts of calcium carbonate powder

[0085] 25 parts of DOP

[0086] 5 parts of epoxidized soybean oil

[0087] 2.5 parts of liquid barium-zinc stabilizer 105

[0088] 0.3 part of powder barium-zinc stabilizer

[0089] 0.8 part of amine compound.

[0090] The particle size of the calcium carbonate powder is 2000 mesh.

[0091] The amine compound includes N,N-diisooctylamine (dioctylamine) and N,N-diisopropylethylamine, and the mass ratio is 3:1.

[0092] The preparation method of the PVC film is as follows:

[0093] ① Mix the raw materials for preparing the PVC film and send them into a kneader for pre-plasticization, and then transport them to an extruder for repeated plasticization; After continuous calendering, a film with a certain thickness is obtained, and then it is led out by a take-off roll;

[0094] ② Cool and solidify the film in a film cooler, and maintain its required shape and performance;

[0095] ③ After the semi-finished product is inspected and qualified, it is cut by a trimming machine to obtain the required width and length; Then the film is wound into a roll by a coiler.

[0096] The raw materials for preparing the adhesive layer are Wacker Elastosil A07 silicone adhesive.

[0097] The release layer is a PET release film.

[0098] The thickness of the base film is 90 microns. The thickness of the adhesive layer is 15 microns. The thickness of the release layer is 50 microns.

[0099] The preparation method of the PVC acid-resistant film: Cut an appropriate size of PVC film, coat the adhesive layer material on the surface of the base film, then dry it, and then laminate the release layer material to obtain the PVC acid-resistant film.

[0100] Example 3

[0101] The invention provides an acid-resistant PVC acid-resistant film, which comprises a PVC film, an adhesive, and a release layer. According to mass parts, the raw materials for preparing the PVC film comprise:

[0102] 100 parts of modified PVC powder

[0103] 5 parts of calcium carbonate powder

[0104] 25 parts of DOP

[0105] 5 parts of epoxidized soybean oil

[0106] 2.5 parts of liquid barium-zinc stabilizer 105

[0107] 0.3 part of powder barium-zinc stabilizer

[0108] 0.8 part of amine compound.

[0109] The preparation method of the modified PVC powder is as follows:

[0110] Dry mix PVC resin and PVDF resin in a dry mixer at a mass ratio of 8:1 for 15 minutes; the mixing temperature is 60 °C;

[0111] Put the pre-mixed powder into a twin-screw extruder for melt blending; the extrusion temperature is 200 °C; the screw speed is 100 rpm;

[0112] The melt-blended material is extruded into strips through the die head of the extruder, and then enters the cooling water tank for rapid cooling and shaping. The cooled and shaped material is cut into granular modified PVC products by a granulator.

[0113] The particle size of the calcium carbonate powder is 1000 mesh.

[0114] The amine compound includes N,N-diisooctylamine (dioctylamine) and N,N-diisopropylethylamine, and the mass ratio is 3:1.

[0115] The preparation method of the PVC film is as follows:

[0116] ① Mix the raw materials for preparing the PVC film and send them into a kneader for pre-plasticization, then transport them to an extruder for repeated plasticization; after continuous calendering, a film with a certain thickness is obtained, and then it is led out by a take-off roll;

[0117] ② Cool and solidify the film in a film cooler, and maintain its required shape and properties;

[0118] ③ After the semi-finished product is inspected and qualified, it is cut by a trimming machine to obtain the required width and length; then the film is wound into a roll by a coiler.

[0119] The raw material for preparing the adhesive layer is Wacker Elastosil A07 silicone rubber.

[0120] The release layer is a PET release film.

[0121] The thickness of the base film is 90 microns. The thickness of the adhesive layer is 15 microns. The thickness of the release layer is 50 microns.

[0122] The preparation method of the PVC acid-resistant film: Cut an appropriate size of the PVC film, coat the adhesive layer material on the surface of the base film, then dry it, and then laminate the release layer material to obtain the PVC acid-resistant film.

[0123] Example 4

[0124] This example provides an acid-resistant PVC acid-resistant film, which includes a PVC film, an adhesive, and a release layer. According to parts by mass, the raw materials for preparing the PVC film include:

[0125] 100 parts of modified PVC powder

[0126] 5 parts of calcium carbonate powder

[0127] 25 parts of DOP

[0128] 5 parts of epoxidized soybean oil

[0129] 2.5 parts of liquid barium-zinc stabilizer 105

[0130] 0.3 part of powder barium-zinc stabilizer

[0131] 0.8 part of amine compound.

[0132] The preparation method of the modified PVC powder is as follows:

[0133] Dry mix PVC resin and PVDF resin in a dry mixer according to a mass ratio of 8:1 for 15 minutes; the mixing temperature is 60 °C;

[0134] Put the pre-mixed powder into a twin-screw extruder for melt blending; the extrusion temperature is 200 °C; the screw speed is 100 rpm;

[0135] The material after melt blending is extruded into strips through the die head of the extruder, and then enters the cooling water tank for rapid cooling and shaping. The material after cooling and shaping is cut into granular modified PVC products by a pelletizer.

[0136] The particle size of the calcium carbonate powder is 2000 mesh.

[0137] The amine compound is triethanolamine.

[0138] The preparation method of the PVC film is as follows:

[0139] ① Mix the raw materials for preparing the PVC film and send them into a kneader for pre-plasticization, and then transport them to an extruder for repeated plasticization; after continuous calendering, a film with a certain thickness is obtained, and then it is led out by a take-off roll;

[0140] ② Cool and solidify the film in a film cooler, and maintain its required shape and properties;

[0141] ③ After the semi-finished product is inspected and qualified, it is cut by a trimming machine to obtain the required width and length; then the film is wound into a roll by a coiler.

[0142] The raw materials for preparing the adhesive layer are Wacker Elastosil A07 silicone rubber.

[0143] The release layer is a PET release film.

[0144] The thickness of the base film is 90 microns. The thickness of the adhesive layer is 15 microns. The thickness of the release layer is 50 microns.

[0145] The preparation method of the PVC acid-resistant film: Cut an appropriate size of the PVC film, coat the adhesive layer material on the surface of the base film, then dry it, and then laminate the release layer material to obtain the PVC acid-resistant film.

[0146] Example 5

[0147] The invention provides an acid-resistant PVC acid-resistant film, which comprises a PVC film, an adhesive, and a release layer. According to parts by mass, the raw materials for preparing the PVC film include:

[0148] 100 parts of modified PVC powder

[0149] 5 parts of calcium carbonate powder

[0150] 25 parts of DOP

[0151] 5 parts of epoxidized soybean oil

[0152] 2.5 parts of liquid barium-zinc stabilizer 105

[0153] 0.3 part of powder barium-zinc stabilizer

[0154] The preparation method of the modified PVC powder is as follows:

[0155] Dry mix PVC resin and PVDF resin in a dry mixer at a mass ratio of 8:1 for 15 minutes; the mixing temperature is 60°C;

[0156] Put the pre-mixed powder into a twin-screw extruder for melt blending; the extrusion temperature is 200°C; the screw speed is 100 rpm;

[0157] The melt-blended material is extruded into strips through the die head of the extruder, and then enters the cooling water tank for rapid cooling and shaping. The shaped material is cut into granular modified PVC products by a pelletizer.

[0158] The particle size of the calcium carbonate powder is 2000 mesh.

[0159] The preparation method of the PVC film is as follows:

[0160] ① Mix the raw materials for preparing the PVC film and send them to a kneader for pre-plasticization, and then transport them to an extruder for repeated plasticization; after continuous calendering, a film with a certain thickness is obtained, and then it is led out by a take-off roll;

[0161] ② Cool and solidify the film in a film cooler and maintain its required shape and properties;

[0162] ③ After the semi-finished product is inspected and qualified, it is cut by a trimming machine to obtain the required width and length; then the film is wound into a roll by a winder.

[0163] The raw material for preparing the adhesive layer is Wacker Elastosil A07 silicone rubber.

[0164] The release layer is a PET release film.

[0165] The thickness of the base film is 90 microns. The thickness of the adhesive layer is 15 microns. The thickness of the release layer is 50 microns.

[0166] The preparation method of the PVC acid-resistant film: Cut an appropriate size of PVC film, coat the adhesive layer material on the surface of the base film, then dry it, and then laminate the release layer material to obtain the PVC acid-resistant film.

[0167] Example 6

[0168] The invention provides an acid-resistant PVC anti-acid film, which comprises a PVC film, an adhesive, and a release layer. By mass, the raw materials for preparing the PVC film include:

[0169] 100 parts of modified PVC powder

[0170] 5 parts of calcium carbonate powder

[0171] 25 parts of DOP

[0172] 5 parts of epoxidized soybean oil

[0173] 2.5 parts of liquid barium-zinc stabilizer 105

[0174] 0.3 part of powder barium-zinc stabilizer

[0175] 0.8 part of amine compound.

[0176] The preparation method of the modified PVC powder is as follows:

[0177] Dry blend PVC resin and PVDF resin in a drying mixer at a mass ratio of 8:1 for 15 minutes; the mixing temperature is 60°C;

[0178] Put the pre-mixed powder into a twin-screw extruder for melt blending; the extrusion temperature is 200°C; the screw speed is 100 rpm;

[0179] The melt-blended material is extruded into strips through the die head of the extruder, and then enters a cooling water tank for rapid cooling and shaping. The shaped material is cut into granular modified PVC products by a pelletizer.

[0180] The particle size of the calcium carbonate powder is 2000 mesh.

[0181] The amine compound includes N,N-diisooctylamine (dioctylamine) and N,N-diisopropylethylamine, and the mass ratio is 3:1.

[0182] As an embodiment of the present invention, the preparation method of the PVC film is as follows:

[0183] ① Mix the raw materials for preparing the PVC film and send them into a kneader for pre-plasticization, and then transport them to an extruder for repeated plasticization; after continuous calendering, a film with a certain thickness is obtained, and then it is led out by a take-off roll;

[0184] ② Cool and solidify the film in a film cooler, and maintain its required shape and properties;

[0185] ③ After the semi-finished product is inspected and qualified, it is cut by a trimming machine to obtain the required width and length; then the film is wound into a roll by a coiler.

[0186] The raw material for preparing the adhesive layer is silicone adhesive, specifically: Loctite SI 5140.

[0187] The release layer is a PET release film.

[0188] The thickness of the base film is 90 microns. The thickness of the adhesive layer is 15 microns. The thickness of the release layer is 50 microns.

[0189] The preparation method of the PVC acid-resistant film: Cut an appropriate size of PVC film, coat the adhesive layer material on the surface of the base film, then dry it, and then laminate the release layer material to obtain the PVC acid-resistant film.

[0190] Performance Test

[0191] 1. Acid resistance: Immerse the acid-resistant film in 18% hydrofluoric acid for 20 h, and observe whether there is acid leakage or foaming. After the acid-soaked acid-resistant film is washed and air-dried naturally, the results are shown in Table 1.

[0192] Table 1 Acid Resistance Test Results

[0193] Examples Whether acid seepage and foaming occur Example 1 No acid seepage and no foaming Example 2 No acid seepage and foaming occurs Example 3 No acid seepage and foaming occurs Example 4 No acid seepage and foaming occurs Example 5 Acid seepage and foaming occur Example 6 No acid seepage and foaming occurs

[0194] 2. Residual glue test; Take 20 pieces of 10 cm * 10 cm acid-resistant films prepared in the examples and stick them on the surface of ITO conductive glass to make them completely fit. After one week, tear off the acid-resistant film and observe the ITO conductive glass. Count the number of glass pieces with visible residual glue on the ITO conductive glass. The results are shown in Table 2.

[0195] Table 2 Residual Glue Test Results

[0196] Example Number of glass blocks with residual glue Example 1 0 Example 2 0 Example 3 5 Example 4 7 Example 5 9 Example 6 9

[0197] Finally, it should be noted that: The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: They can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An acid-resistant PVC composition, characterized in that: The invention comprises a PVC film, wherein the raw materials for preparing the PVC film comprise, in parts by weight: Modified PVC powder 90~110 parts Calcium carbonate powder 4-6 parts DOP 20~30 copies Epoxidized soybean oil 3~7 parts Liquid barium zinc stabilizer 105 2~3 parts Powdered barium zinc stabilizer 0.2~0.5 parts 0.1~1.0 part of amine compound; The preparation method of the modified PVC powder is as follows: PVC resin and PVDF resin are dry mixed in a dry mixer at a mass ratio of 8:1 for 10-15 minutes at a mixing temperature of 50-60°C; The premixed powder is placed in a twin-screw extruder for melt blending; the extrusion temperature is 170℃~210℃; the screw speed is 60~100 rpm; The melt-blended material is extruded into strips through the extruder die head, and then enters the cooling water tank for rapid cooling and shaping. The cooled and shaped material is cut into granular modified PVC products by a pelletizer.

2. The acid-resistant PVC composition according to claim 1, characterized in that: The particle size of the calcium carbonate powder is 1500-2000 mesh.

3. The acid-resistant PVC composition according to claim 1, characterized in that: The amine compound is selected from one or more of tert-butylamine, isopropylamine, 2-ethylhexylamine, isobutylamine, triethanolamine, diisopropylamine, N-tert-butylethylenediamine, 2-amino-2-methyl-1-propanol, N,N-diisooctylamine, N,N-diisopropylethylamine and 2-tert-butylpropylamine.

4. The acid-resistant PVC composition according to claim 1, characterized in that: The amine compound comprises N,N-diisooctylamine and N,N-diisopropylethylamine, and the mass ratio is 3:

1.

5. The acid-resistant PVC composition according to claim 1, characterized in that: The preparation method of the PVC film is as follows: ① After mixing the raw materials for preparing the PVC film, send them into the internal mixer for pre-plasticization, and then send them to the extruder for repeated plasticization and plasticization; after continuous calendering, a film of a certain thickness is obtained, and then it is led out through the take-off roller; ② Cool and solidify the film in a film cooler and maintain its required shape and performance; ③ After the semi-finished product is tested and qualified, the trimming machine cuts it to the required width and length; then the film is rolled into a roll by the winder.

6. The acid-resistant PVC composition according to claim 1, characterized in that: The PVC film is also provided with an adhesive layer and a release layer.

7. The acid-resistant PVC composition according to claim 6, characterized in that: The raw material for preparing the adhesive layer is silicone glue.

8. An acid-resistant PVC film, characterized in that: Prepared from the composition according to any one of claims 1 to 7.

9. The PVC film according to claim 8, characterized in that: Used in the field of glass etching.