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CN-121991442-A - Flame-retardant PVC floor film and preparation method thereof

CN121991442ACN 121991442 ACN121991442 ACN 121991442ACN-121991442-A

Abstract

The invention discloses a flame-retardant PVC floor film and a preparation method thereof, wherein the flame-retardant PVC floor film comprises the following raw materials in parts by weight; the method comprises the steps of putting the pretreated raw materials into a high-speed mixer for stirring and mixing, feeding the cured dry blend into a double-screw extruder, setting the temperature of a charging barrel in sections, starting a vacuum exhaust device, extruding to form a sheet PVC base material, guiding the PVC base material into a three-roller calender, setting the roller temperature, the roller speed and a roller gap, rolling and stretching to a target thickness, cooling the rolled film, trimming the edge, adjusting the tension, automatically coiling and packaging to obtain the flame-retardant PVC floor film. Through matching with various raw materials such as PVC resin, the compatibility of the raw materials is improved, the mechanical property and the processing stability of the PVC floor film are improved, the reduction of the toughness and the wear resistance of a product caused by adding flame retardant components is avoided, and meanwhile, the flame retardant and smoke suppressant are adopted for cooperation and surface activation treatment, so that the flame retardance is enhanced, the smoke is suppressed, and the requirements of high flame retardance and low smoke generation are met.

Inventors

  • LI WANGYANG
  • ZHANG WU
  • HU WEI
  • CHEN DENGLIANG
  • ZHAO KAI
  • CAO HAIXIA
  • DUAN CHUNLAI
  • WAN HUI
  • SUN TIANLONG
  • TAN WENLONG

Assignees

  • 安徽嘉阳新材料科技有限公司

Dates

Publication Date
20260508
Application Date
20251229

Claims (9)

  1. 1. The preparation method of the flame-retardant PVC floor film is characterized by comprising the following steps of: The method comprises the following steps of weighing, by weight, 90-110 parts of PVC resin, 20-40 parts of internal plasticization polyvinyl chloride, 5-15 parts of acrylate modified polyvinyl chloride, 2-5 parts of auxiliary plasticizer, 0.5-1.5 parts of stabilizer, 0.01-0.05 part of organic peroxide, 10-20 parts of flame retardant, 1-3 parts of smoke suppressant and 0.2-1.8 parts of lubricant, drying the PVC resin, the internal plasticization polyvinyl chloride and the acrylate modified polyvinyl chloride for 2-3 hours at 60-70 ℃, controlling the moisture content of the raw materials to be less than or equal to 0.1%, and carrying out surface activation treatment on the flame retardant, wherein the surface activation treatment adopts silane coupling agent KH-550 to modify superfine aluminum hydroxide, and carries out cold storage and room temperature tempering treatment on the organic peroxide; putting the pretreated raw materials into a high-speed mixer for stirring and mixing, controlling the effective volume of the high-speed mixer to be 500L and the rotating speed to be 0-1500r/mi, controlling the mixing temperature to be 80-100 ℃, cooling to 40-50 ℃, discharging to obtain a dry mixed material, and standing and curing the dry mixed material for 4-6 hours; Step three, feeding the cured dry blend into a double-screw extruder, setting the temperature of a charging barrel in sections, starting a vacuum exhaust device, and extruding to form a flaky PVC substrate; Step four, the PVC base material is led into a three-roller calender, roller temperature, roller speed and roller gap are set, and the PVC base material is rolled and stretched to the target thickness; and fifthly, cooling the film after the rolling, trimming the edge, adjusting the tension, automatically coiling and packaging to obtain the flame-retardant PVC floor film.
  2. 2. The method for preparing the flame-retardant PVC floor film according to claim 1, wherein in the first step, the PVC resin is SG-5 type universal PVC resin, the internal plasticization PVC is a vinyl chloride-vinyl acetate copolymer, the acrylic ester modified PVC is an acrylic ester grafted PVC copolymer, the auxiliary plasticizer is epoxy soybean oil, the stabilizer is a calcium-zinc composite stabilizer, the organic peroxide is dicumyl peroxide, the flame retardant is superfine aluminum hydroxide, the smoke suppressant is molybdenum trioxide, and the lubricant is stearic acid.
  3. 3. The method for preparing the flame-retardant PVC floor film according to claim 1, wherein in the fourth step, the roller diameter of the three-roller calender is 300mm, the roller surface width is 1200mm, the roller temperature is set to be 170-175 ℃, the middle roller is 175-180 ℃ and the lower roller is 165-170 ℃, the preheating time is not less than 20 minutes, the roller speed is 15-25m/min, the rotating speed difference of each roller is not more than 1%, and the pressure between rollers is 0.3-0.5MPa.
  4. 4. The method for producing a flame retardant PVC flooring film according to claim 1, wherein the winding tension in the fifth step is 5 to 10N/m, the winding diameter is 300 to 500mm, and the weight per winding is 50 to 100kg.
  5. 5. The preparation method of the flame-retardant PVC floor film according to claim 1, wherein in the first step, the components comprise 90 parts by weight of PVC resin, 20 parts by weight of internal plasticization polyvinyl chloride, 5 parts by weight of acrylate modified polyvinyl chloride, 2 parts by weight of auxiliary plasticizer, 0.5 part by weight of stabilizer, 0.01 part by weight of organic peroxide, 10 parts by weight of flame retardant, 1 part by weight of smoke suppressant and 0.2 part by weight of lubricant.
  6. 6. The preparation method of the flame-retardant PVC floor film according to claim 1, wherein in the first step, the components comprise, by weight, 100 parts of PVC resin, 30 parts of acrylic ester modified polyvinyl chloride, 10 parts of auxiliary plasticizer, 3.5 parts of stabilizer, 1.0 part of organic peroxide, 0.03 part of flame retardant, 15 parts of smoke suppressant, 2 parts of lubricant and 1.0 part of lubricant.
  7. 7. The preparation method of the flame-retardant PVC floor film according to claim 1, wherein in the first step, the components comprise 110 parts by weight of PVC resin, 40 parts by weight of internal plasticization polyvinyl chloride, 15 parts by weight of acrylate modified polyvinyl chloride, 5 parts by weight of auxiliary plasticizer, 1.5 parts by weight of stabilizer, 0.05 part by weight of organic peroxide, 20 parts by weight of flame retardant, 3 parts by weight of smoke suppressant and 1.8 parts by weight of lubricant.
  8. 8. The preparation method of the flame-retardant PVC floor film according to claim 1, wherein in the first step, the components include, by weight, 95 parts of PVC resin, 25 parts of internal plasticization polyvinyl chloride, 7 parts of acrylate modified polyvinyl chloride, 4 parts of auxiliary plasticizer, 1.2 parts of stabilizer, 0.04 part of organic peroxide, 12 parts of flame retardant, 1.5 parts of smoke suppressant and 0.5 part of lubricant.
  9. 9. The flame-retardant PVC floor film is characterized in that the flame-retardant PVC floor film is prepared by the preparation method of any one of claims 1-8, the longitudinal shrinkage rate of the prepared flame-retardant PVC floor film is less than or equal to 2%, the transverse shrinkage rate is less than or equal to 1.5%, and the thickness of a finished film is 1.8-2.0mm.

Description

Flame-retardant PVC floor film and preparation method thereof Technical Field The invention relates to the field of PVC floor film processing, in particular to a flame-retardant PVC floor film and a preparation method thereof. Background PVC floor film is widely applied to the field of building decoration because of the advantages of light weight, wear resistance, easy cleaning and the like. However, the PVC resin is inflammable, has large smoke quantity and high smoke toxicity during combustion, and limits the application of the PVC resin in scenes with high flame retardant requirements such as public buildings and high-rise buildings; In the prior art, in order to improve the flame retardant property of the PVC floor film, a flame retardant is often added for modification, but the problems of poor compatibility, uneven dispersion and the like of the flame retardant and a PVC base material are caused, so that the mechanical property of the floor film is easy to be reduced, and the processing stability is poor. Disclosure of Invention The invention aims to solve the defects in the prior art, and provides a flame-retardant PVC floor film and a preparation method thereof. In order to achieve the above purpose, the present invention adopts the following technical scheme: the preparation method of the flame-retardant PVC floor film comprises the following steps: The method comprises the steps of weighing 90-110 parts of PVC resin, 20-40 parts of internal plasticization polyvinyl chloride, 5-15 parts of acrylate modified polyvinyl chloride, 2-5 parts of auxiliary plasticizer, 0.5-1.5 parts of stabilizer, 0.01-0.05 part of organic peroxide, 10-20 parts of flame retardant, 1-3 parts of smoke suppressant and 0.2-1.8 parts of lubricant according to parts by weight, drying PVC resin, internal plasticization polyvinyl chloride and acrylate modified polyvinyl chloride for 2-3 hours under the drying condition of 60-70 ℃, controlling the moisture content of the raw materials to be less than or equal to 0.1%, carrying out surface activation treatment on the flame retardant, adopting a silane coupling agent KH-550 for modifying superfine aluminum hydroxide, carrying out cold storage and room temperature tempering treatment on the organic peroxide, putting the pretreated raw materials into a high-speed mixer for stirring and mixing, controlling the mixing temperature to be 80-100 ℃ under the conditions of 500L and 0-1500 ℃, cooling to 40-50 ℃, carrying out dry mixing and drying at the temperature for 4-6 ℃, setting the dry mixing roller to obtain a dry-mixing film, carrying out rolling and stretching, carrying out a three-roll stretching, rolling and rolling to obtain a dry-mixing film, setting the dry-rolling and stretching roller to obtain a stretched PVC film, and a three-roll-finishing, and a three-roll finishing step, and a step of carrying out vacuum roll finishing, and a dry-roll finishing, and a step of forming a dry-stretching film. Preferably, in the first step, the PVC resin is SG-5 type universal PVC resin, the internal plasticization PVC is a vinyl chloride-vinyl acetate copolymer, the acrylic ester modified PVC is an acrylic ester grafted PVC copolymer, the auxiliary plasticizer is epoxidized soybean oil, the stabilizer is a calcium-zinc composite stabilizer, the organic peroxide is dicumyl peroxide, the flame retardant is superfine aluminum hydroxide, the smoke suppressant is molybdenum trioxide, and the lubricant is stearic acid. Preferably, in the fourth step, the roller diameter of the three-roller calender is 300mm, the roller surface width is 1200mm, the roller temperature is set to be 170-175 ℃, the middle roller is 175-180 ℃ and the lower roller is 165-170 ℃, the preheating time is not less than 20 minutes, the roller speed is 15-25m/min, the rotating speed difference of each roller is less than or equal to 1%, and the pressure between the rollers is 0.3-0.5MPa. Preferably, in the fifth step, the coiling tension is 5-10N/m, the coiling diameter is 300-500mm, and the weight of each coil is 50-100kg. Preferably, in the first step, the components in parts by weight are 90 parts of PVC resin, 20 parts of internal plasticization polyvinyl chloride, 5 parts of acrylic ester modified polyvinyl chloride, 2 parts of auxiliary plasticizer, 0.5 part of stabilizer, 0.01 part of organic peroxide, 10 parts of flame retardant, 1 part of smoke suppressant and 0.2 part of lubricant. Preferably, in the first step, the components comprise, by weight, 100 parts of PVC resin, 30 parts of acrylic ester modified polyvinyl chloride, 10 parts of auxiliary plasticizer, 3.5 parts of stabilizer, 1.0 part of organic peroxide, 0.03 part of flame retardant, 15 parts of smoke suppressant, 2 parts of lubricant and 1.0 part of lubricant. Preferably, in the first step, the components comprise 110 parts by weight of PVC resin, 40 parts by weight of internal plasticization polyvinyl chloride, 15 parts by weight of acrylic ester modified p