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CN-121975446-A - High-performance PVC foam adhesive tape and preparation method thereof

CN121975446ACN 121975446 ACN121975446 ACN 121975446ACN-121975446-A

Abstract

The invention discloses a high-performance PVC foam adhesive tape and a preparation method thereof, and relates to the field of foam adhesive tapes, wherein the high-performance PVC foam adhesive tape sequentially comprises a release film layer, an adhesive layer I, PVC foam layer and an adhesive layer II from bottom to top. The PVC foam layer is made of PVC materials, wherein the PVC materials comprise, by weight, 70-80 parts of PVC resin, 15-20 parts of plasticizer, 1-2 parts of stabilizer, 3-5 parts of foaming agent, 5-7 parts of filler and 2-3 parts of functional montmorillonite. The PVC foam layer has strong low-temperature impact resistance and ultraviolet aging resistance by combining the raw materials such as functional montmorillonite, plasticizer, stabilizer and the like, and has strong interface adhesion with the adhesive layer I and the adhesive layer II. The PVC foam adhesive tape prepared by the invention has higher stripping force on base materials such as ABS, glass, steel plates and the like, and has strong ultraviolet aging resistance.

Inventors

  • JIANG XIAOLIN

Assignees

  • 极天羽技术股份有限公司

Dates

Publication Date
20260505
Application Date
20260113

Claims (10)

  1. 1. The high-performance PVC foam adhesive tape is characterized by sequentially comprising a release film layer, an adhesive layer I, PVC foam layer and an adhesive layer II from bottom to top, wherein the PVC foam layer is made of PVC materials, and the PVC materials comprise, by weight, 70-80 parts of PVC resin, 15-20 parts of plasticizer, 1-2 parts of stabilizer, 3-5 parts of foaming agent, 5-7 parts of filler and 2-3 parts of functional montmorillonite.
  2. 2. The high-performance PVC foam tape according to claim 1, wherein the preparation method of the functional montmorillonite comprises the following steps: Step A1, adding tertiary amine-containing aromatic aldehyde into acetic anhydride, stirring, adding potassium propionate, starting reflux, and heating and stirring to obtain a product A1; Step A2, mixing a product a1, an amino-containing aromatic compound and anhydrous DMF in a protective gas, stirring, adding triethylamine and N, N' -dicyclohexylcarbodiimide, and heating and stirring to obtain a product A2; step A3, mixing the product a2, halogenated alcohol and absolute ethyl alcohol, heating and stirring to obtain a product A3, mixing the product A3, methanol aqueous solution and reducing agent, and heating and stirring in protective gas to obtain a product a4; And A4, mixing montmorillonite, deionized water and absolute ethyl alcohol, performing ultrasonic dispersion, adding a product A4, and heating and stirring to obtain the functional montmorillonite.
  3. 3. The high-performance PVC foam adhesive tape according to claim 2, wherein in the step A1, the usage amount ratio of tertiary amine-containing aromatic aldehyde to acetic anhydride to potassium propionate is 8.5-9g to 6-7g, and the tertiary amine-containing aromatic aldehyde is p-dimethylaminobenzaldehyde.
  4. 4. A high performance PVC foam tape according to claim 2, wherein in step A2, the product a1, amino-containing aromatic compound, anhydrous DMF, triethylamine and N, N' -dicyclohexylcarbodiimide are used in a ratio of 13-14g:7.5-8.5g:55-65mL:1.5-2g:2.5-3g.
  5. 5. The high-performance PVC foam adhesive tape according to claim 2, wherein in the step A2, the amino-containing aromatic compound is prepared by mixing paranitroaniline and 1H-benzotriazole according to a molar ratio of 1:1-1.5.
  6. 6. The high-performance PVC foam tape according to claim 2, wherein in the step A3, the dosage ratio of the product a2 to the halohydrin to the absolute ethanol is 18-20g:6-8g:50-60mL, and the halohydrin is 6-chloro-1-hexanol or 3-chloro-1-propanol.
  7. 7. The high-performance PVC foam tape according to claim 2, wherein in the step A3, the dosage ratio of the product A3 to the aqueous methanol solution to the reducer is 25-30 g/50-60 mL/10-15 mL.
  8. 8. The high-performance PVC foam tape according to claim 2, wherein in the step A4, the dosage ratio of montmorillonite, deionized water, absolute ethyl alcohol and the product A4 is 10-12 g/80-90 mL/20-30 mL/4-5 g.
  9. 9. A method for preparing the high-performance PVC foam adhesive tape according to any one of claims 1 to 8, which is characterized by comprising the following steps: mixing PVC resin, plasticizer, stabilizer, foaming agent, filler and functional montmorillonite, heating and stirring, and then continuing heating and preserving heat and cooling to obtain PVC material; the method comprises the steps of (a) placing a release film on a top surface of a PVC foam layer, and then coating an acrylic pressure-sensitive adhesive on the top surface of the PVC foam layer to obtain a high-performance PVC foam adhesive tape.
  10. 10. The method of claim 9, wherein in the step (I), the cooling process is to cool to 75-80 ℃ at a rate of 5-10 ℃ per minute, to cool to 45-50 ℃ at a rate of 3-5 ℃ per minute, and to cool to room temperature at a rate of 1-2 ℃ per minute.

Description

High-performance PVC foam adhesive tape and preparation method thereof Technical Field The invention relates to the field of foam tapes, in particular to a high-performance PVC foam tape and a preparation method thereof. Background The foam adhesive tape is usually prepared by coating solvent pressure-sensitive adhesive or hot melt pressure-sensitive adhesive on one or both sides of PVC (polyvinyl chloride) foam, EVA (ethylene-vinyl acetate copolymer) foam and PE (polyethylene) foam serving as base materials and then coating release paper, and has the functions of sealing, shock absorption, compression deformation resistance, flame retardance and the like. The foam adhesive tape is widely applied to the fields of electronic and electric products, mechanical parts, various small household appliances, mobile phone accessories, industrial instruments, computers and peripheral equipment, automobile accessories, video and audio equipment, toys, cosmetics, art gifts, medical instruments, electric tools, office stationery, shelf display, home decoration, acrylic glass, ceramic products and the like, and is used for insulation, adhesion, sealing, skid prevention, shock absorption and packaging in the fields. The PVC foam has advantages in foam adhesive tapes due to low cost, wide temperature resistant range, high mechanical strength, good toughness and excellent weather resistance. The PVC foam is generally prepared from raw materials such as PVC resin, plasticizer, stabilizer, foaming agent and filler. However, when the PVC foam adhesive tape is used in a low-temperature environment, the PVC molecular chain is contracted, the thermal movement of the plasticizer is inhibited, but the free volume of the PVC molecular chain is reduced due to contraction, more migration channels are formed, the plasticizer is in migration failure, the low-temperature impact resistance of the PVC foam is reduced, the foam adhesive tape is hard, the bonding strength is reduced, and the interface adhesiveness between the PVC foam and the pressure-sensitive adhesive is insufficient, so that the PVC foam adhesive tape is limited to be widely applied. Based on this, we need to further study how to develop a PVC foam material with excellent low temperature impact resistance, and at the same time, enhance the interfacial adhesion of PVC foam and pressure sensitive adhesive, so as to obtain a high performance PVC foam tape. Disclosure of Invention In order to solve the technical problems, the invention provides a high-performance PVC foam adhesive tape and a preparation method thereof. The aim of the invention can be achieved by the following technical scheme: A high-performance PVC foam adhesive tape sequentially comprises a release film layer, an adhesive layer I, PVC foam layer and an adhesive layer II from bottom to top. Further, the adhesive layer I and the adhesive layer II are acrylate pressure-sensitive adhesives; further, the thickness of the adhesive layer I is 0.05-0.1mm, and the thickness of the adhesive layer II is 0.1-0.2mm; further, the PVC foam layer is made of PVC materials, wherein the PVC materials comprise, by weight, 70-80 parts of PVC resin, 15-20 parts of plasticizer, 1-2 parts of stabilizer, 3-5 parts of foaming agent, 5-7 parts of filler and 2-3 parts of functional montmorillonite; Further, the thickness of the PVC foam layer is 0.5-1.0mm; further, the plasticizer is obtained by mixing dioctyl adipate and epoxidized soybean oil according to the mass ratio of 1-1.5:1; further, the stabilizer is a calcium-zinc composite stabilizer, the foaming agent is ‌ azo-dimethylformamide, and the filler is light calcium carbonate. Further, the preparation method of the high-performance PVC foam adhesive tape comprises the following steps: mixing PVC resin, plasticizer, stabilizer, foaming agent, filler and functional montmorillonite, heating and stirring, and then continuing heating and preserving heat and cooling to obtain PVC material; the method comprises the steps of (a) placing a release film on a top surface of a PVC foam layer, and then coating an acrylic pressure-sensitive adhesive on the top surface of the PVC foam layer to obtain a high-performance PVC foam adhesive tape. Further, the preparation method of the high-performance PVC foam adhesive tape comprises the following specific steps: Mixing PVC resin, plasticizer, stabilizer, foaming agent, filler and functional montmorillonite, stirring at 60-70 ℃ for 30-40min, heating to 160-165 ℃, preserving heat for 10-12min, and cooling to obtain PVC material; Further, the cooling process is that the temperature is firstly reduced to 75-80 ℃ at the speed of 5-10 ℃ per minute, then reduced to 45-50 ℃ at the speed of 3-5 ℃ per minute, and then reduced to room temperature at the speed of 1-2 ℃ per minute; The method comprises the steps of (a) placing a release film on a top surface of a release film layer to obtain a release film layer, coating acrylic pressure-sensitive adhesive on