Search

CN-119955203-B - Fluoroplastic film, and preparation method and application thereof

CN119955203BCN 119955203 BCN119955203 BCN 119955203BCN-119955203-B

Abstract

The invention discloses a fluoroplastic film, which comprises the following raw material compositions of, by weight, 100 parts of fluoroplastic, 0.25-2.3 parts of infrared absorber, 0.09-1.5 parts of dispersing agent and 0.09-1.5 parts of other auxiliary agents, wherein the other auxiliary agents comprise mineral oil and/or organosiloxane. The fluoroplastic film material with good mechanical properties, high visibility, obvious heat insulation performance and excellent comprehensive performance is successfully prepared by taking fluoroplastic as a base material, taking nano cesium tungsten bronze powder, ITO and ATO as infrared absorbers, combining stearic acid or synthetic wax and mineral oil or silicone oil as auxiliary materials through a tape casting film forming process. The tensile strength of the fluoroplastic film prepared by the method can reach 51Mpa, the breaking productivity can reach 420%, the visible light transmittance can reach 58%, the haze is as low as 34%, the IR (760-2500 nm) transmittance is as low as 10%, the UV (200-380 nm) transmittance is as low as 4%, and the temperature rise after 30min is 18 ℃, so that the fluoroplastic film can be used as a fluoroplastic film material with high comprehensive requirements on mechanics, visibility, heat insulation performance and the like.

Inventors

  • WU KE
  • XIAO XIANJIANG

Assignees

  • 上海孚加新材料科技有限公司

Dates

Publication Date
20260508
Application Date
20250123

Claims (15)

  1. 1. The fluoroplastic film is characterized by comprising the following raw material compositions, by weight, 100 parts of fluoroplastic, 0.25-2.3 parts of infrared absorber, 0.09-1.5 parts of dispersing agent and 0.09-1.5 parts of other auxiliary agents; wherein the other auxiliary agents comprise mineral oil and organic siloxane, and the dispersing agent is synthetic wax.
  2. 2. The fluoroplastic film according to claim 1, wherein the raw material composition comprises, by weight, 100 parts of fluoroplastic, 0.3 to 2.1 parts of infrared absorber, 0.1 to 1.1 parts of dispersant and 0.1 to 1.1 parts of other auxiliary agent.
  3. 3. The fluoroplastic film according to claim 2, wherein the raw material composition of the fluoroplastic film comprises, by weight, 100 parts of fluoroplastic, 0.3-1.1 parts of infrared absorber, 0.1-0.9 parts of dispersant and 0.1-0.9 parts of other auxiliary agents.
  4. 4. The fluoroplastic film according to claim 2, wherein the raw material composition of the fluoroplastic film comprises, by weight, 100 parts of fluoroplastic, 0.3-0.6 part of infrared absorber, 0.1-0.5 part of dispersant and 0.1-0.5 part of other auxiliary agent.
  5. 5. The fluoroplastic film of claim 2, wherein the fluoroplastic film raw material composition satisfies at least one of the following conditions: The fluoroplastic comprises a fluoropolymer; the infrared absorbing agent includes cesium tungsten bronze powder, indium tin oxide, or tin antimony oxide.
  6. 6. The fluoroplastic film of claim 5, wherein the fluoroplastic film raw material composition satisfies at least one of the following conditions: The fluorine-containing polymer comprises one of ethylene-tetrafluoroethylene copolymer, tetrafluoroethylene-hexafluoropropylene copolymer, vinylidene fluoride polymer and perfluoroalkyl vinyl ether-tetrafluoroethylene copolymer; The particle size of the cesium tungsten bronze powder is in the nanometer scale, when the infrared absorber comprises the Indium Tin Oxide (ITO), the particle size of the Indium Tin Oxide (ITO) is in the nanometer scale, and when the infrared absorber comprises the tin antimony oxide (ATO), the particle size of the tin antimony oxide (ATO) is in the nanometer scale; The synthetic wax includes polyethylene wax.
  7. 7. The fluoroplastic film of claim 6, wherein the cesium tungsten bronze powder is nano cesium tungsten bronze powder.
  8. 8. The fluoroplastic film according to claim 6, wherein when said other auxiliary agent comprises said mineral oil and said organosilane, the weight ratio of said mineral oil to said organosilane is 1 (1-5).
  9. 9. A method for producing a fluoroplastic film according to any one of claims 1 to 8, characterized by comprising the steps of: (1) Premixing the fluoroplastic, the infrared absorber, the dispersing agent and the other auxiliary agents to obtain a particle mixture; (2) Carrying out melt granulation on the particle mixture obtained in the step (1) to obtain modified particles; (3) And (3) drying the modified particles obtained in the step (2), and casting to form a film to obtain the fluoroplastic film.
  10. 10. The method for producing a fluoroplastic film according to claim 9, wherein said production method satisfies at least one of the following conditions: in step (1), the premixing is an operation of performing the premixing in a high-speed mixer; in the step (1), the premixing time is 4-8 min; in the step (1), the rotating speed of the premixing is 300-600 rpm.
  11. 11. The method of producing a fluoroplastic film according to claim 10, wherein in step (1), the pre-mixing time is 5min; in the step (1), the rotating speed of the premixing is 300-600 rpm.
  12. 12. The method for producing a fluoroplastic film according to claim 9, wherein said production method satisfies at least one of the following conditions: in the step (2), the melting is an operation of performing the melting in a double screw extruder; in the step (2), the melting temperature is 250-400 ℃; in the step (3), the temperature of the drying is 120-150 ℃; in the step (3), the drying time is 2-4 hours; in the step (3), the casting film comprises casting, extruding and shaping.
  13. 13. The method of claim 12, wherein in the step (2), the melting temperature is 300 to 380 ℃.
  14. 14. A fluoroplastic film prepared by the method for preparing a fluoroplastic film according to any one of claims 9 to 13.
  15. 15. Use of the fluoroplastic film according to claim 14 as a heat-insulating film in the construction field or in the automotive field.

Description

Fluoroplastic film, and preparation method and application thereof Technical Field The invention belongs to the technical field of plastic processing, and particularly relates to a fluoroplastic film, a preparation method and application thereof. Background In the construction and automotive fields, the installed glass has very high solar transmittance, which results in a rapid rise in indoor temperature. In order to improve the heat insulation of glass, shading and heat insulation are generally carried out by installing a sunshade curtain, and in the use process, the sunshade curtain is easy to loosen and fall off due to stretching, so that potential safety hazard is caused, and additional cost is required to be increased. In order to reduce the potential safety hazard, a heat insulation film can be adhered on the glass. However, the prior heat insulation films all use PET as a base material, the outdoor service life is not more than 10 years, and the durability is low. The fluoroplastic film is widely applied to buildings such as outdoor exhibition halls, gymnasiums, agricultural greenhouses and the like due to excellent weather resistance, mechanical properties and pollution resistance. However, since fluoroplastic itself has very high light transmittance (visible light, UV band and IR band), especially the band that causes temperature rise in sunlight cannot be effectively blocked, sunlight can be directly incident into a room, and the temperature rise rate of the temperature inside is fast. In high temperature seasons, particularly summer, human comfort is greatly reduced, and thus it is required to reduce transmittance of sunlight in a temperature rising band, particularly transmittance of sunlight in an infrared band, caused by sunlight. Therefore, there is a need in the art to develop a film that has low safety hazards, excellent durability, and desirable mechanical properties and thermal insulation properties. Disclosure of Invention The invention aims to solve the technical problems that the sunshade curtain has potential safety hazard in the existing heat insulation means, the existing film material has low durability and low service life, the transmittance of the UV wave band and the IR wave band is low, the heat insulation performance is low, and the comfort of a human body is reduced in a high-temperature season, and provides a fluoroplastic film, and a preparation method and application thereof. The fluoroplastic film prepared by the invention has ideal mechanical properties, the tensile strength is more than or equal to 51MPa, the breaking productivity can reach 420% or more, the haze is as low as 34%, the heat insulation performance is excellent, the UV wave band is as low as 10%, the IR wave band transmittance is as low as 4%, and the temperature rise after 30min is obviously reduced, so that the fluoroplastic film can be used as a heat insulation film plastic material with higher requirements on mechanical and heat insulation performances. The invention adopts the following technical scheme to solve the technical problems: The invention provides a raw material composition of a fluoroplastic film, which comprises, by weight, 100 parts of fluoroplastic, 0.25-2.3 parts of infrared absorber, 0.09-1.5 parts of dispersing agent and 0.09-1.5 parts of other auxiliary agents; wherein the other auxiliary agents comprise mineral oil and/or organic siloxane. In some embodiments, the raw material composition of the fluoroplastic film can comprise, by weight, 100 parts of fluoroplastic, 0.3-2.1 parts of infrared absorber, 0.1-1.1 parts of dispersing agent and 0.1-1.1 parts of other auxiliary agents. Preferably, the raw material composition of the fluoroplastic film comprises, by weight, 100 parts of fluoroplastic, 0.3-1.1 parts of infrared absorber, 0.1-0.9 parts of dispersing agent and 0.1-0.9 parts of other auxiliary agents. More preferably, the raw material composition of the fluoroplastic film comprises, by weight, 100 parts of fluoroplastic, 0.3-0.6 part of infrared absorber, 0.1-0.5 part of dispersing agent and 0.1-0.5 part of other auxiliary agent. In some embodiments, the fluoroplastic may comprise a fluoropolymer, preferably one of an ethylene-tetrafluoroethylene copolymer, a tetrafluoroethylene-hexafluoropropylene copolymer, a vinylidene fluoride polymer, a perfluoroalkyl vinyl ether-tetrafluoroethylene copolymer. In some embodiments, the infrared absorber can include at least one of cesium tungsten bronze powder, indium Tin Oxide (ITO), and tin antimony oxide (ATO). Wherein, when the infrared absorber comprises the cesium tungsten bronze powder, the particle size of the cesium tungsten bronze powder is on the nanometer scale. Can be nano cesium tungsten bronze powder. Wherein when the infrared absorber comprises the Indium Tin Oxide (ITO), the particle size of the Indium Tin Oxide (ITO) is in the nanometer scale. Wherein when the infrared absorber comprises the tin antimony oxide (ATO), the