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CN-121975279-A - Release film with internally added non-silicon release master batch, preparation method and nanoscale roughness

CN121975279ACN 121975279 ACN121975279 ACN 121975279ACN-121975279-A

Abstract

The invention discloses a release film with a non-silicon release master batch added therein, a preparation method and nanoscale roughness, wherein the preparation raw materials comprise PET resin I, a non-silicon release agent composition and an antioxidant, and the non-silicon release agent composition comprises polyester wax and oxidized polyethylene wax. The invention utilizes the combination of polyester wax and oxidized polyethylene wax, builds a release functional phase with uniformly dispersed nanometer scale and stable interface in the PET matrix through the unique molecular synergistic effect and the matched processing technology, solves the fundamental contradiction that the surface roughness and release function of the release film are difficult to be compatible when the release film is internally added, radically eliminates the migration pollution of silicon, and simplifies the process and is convenient to be recovered by using the internal adding technology.

Inventors

  • YANG SHUO
  • WANG DAPENG
  • ZHOU MUCHUN
  • Lan Zifeng
  • WU SHUWEI

Assignees

  • 汕头市贝斯特科技有限公司

Dates

Publication Date
20260505
Application Date
20260312

Claims (10)

  1. 1. A non-silicon release master batch added therein is characterized in that the preparation raw materials comprise PET resin I, a non-silicon release agent composition and an antioxidant, wherein the non-silicon release agent composition comprises polyester wax and oxidized polyethylene wax.
  2. 2. The internal addition non-silicone release master batch according to claim 1, wherein the weight ratio of the polyester wax to the oxidized polyethylene wax is (1-3): 1.
  3. 3. The internal addition of a non-silicone release concentrate of claim 1, wherein the polyester wax has an acid number of 15 to 30 mg KOH/g and a drop point of 70 to 100 ℃.
  4. 4. The internally added non-silicone release master batch according to claim 1, wherein the oxidized polyethylene wax has an acid value of 10 to 25 mg KOH/g and a softening point of 102 to 108 ℃.
  5. 5. The internal addition of a non-silicone release concentrate of claim 1, wherein the PET resin has an intrinsic viscosity of 0.65-0.70 dl/g at 25 ℃.
  6. 6. A method for preparing an internally added non-silicon release master batch according to any one of claims 1 to 5, comprising the steps of: Feeding the dried PET resin I serving as a main material from the head into an extruder; Premixing a non-silicon release agent composition and an antioxidant, and then adding the mixture as auxiliary materials into an extruder from side feeding; and (3) reacting under shearing, cooling and granulating the braces to obtain the internally added non-silicon release master batch.
  7. 7. The method for preparing the internally-added non-silicon release master batch according to claim 6, wherein the side feeding interval temperature of the auxiliary materials is 230-250 ℃, the head feeding interval temperature of the main materials is 240-260 ℃, and the mixing temperature of the main materials and the auxiliary materials is 230-260 ℃.
  8. 8. The method of claim 6, wherein the shearing speed is 280-320rpm.
  9. 9. The method for preparing a release master batch with no silicon added therein according to claim 6, wherein the reaction time is 90-120s.
  10. 10. A nanoscale roughness non-silicon release film is characterized by sequentially comprising a first surface layer, a middle layer and a second surface layer, wherein the first surface layer, the middle layer and the second surface layer are fixedly connected, the first surface layer and the second surface layer are prepared from the same raw materials, the first surface layer and the second surface layer comprise PET resin II and an internally added non-silicon release master batch according to any one of claims 1-5, and the weight ratio of the PET resin II to the internally added non-silicon release master batch is (70-90): (10-30).

Description

Release film with internally added non-silicon release master batch, preparation method and nanoscale roughness Technical Field The invention relates to the field of compositions of high molecular compounds, in particular to a non-silicon release master batch added internally, a preparation method and a non-silicon release film with nanoscale roughness. Background The current release film realizes the release function by coating organic silicon or fluorine on the surface of the polyester material, but the silicone molecules in the current organic silicon coating have migration risks, and can pollute electronic elements, so that poor welding, signal interference or bonding failure can be caused. Fluorine-containing coatings are subject to increasingly stringent environmental regulations. And the coating process is limited by the leveling property of the coating liquid, the roughness of the film surface is higher, and the surface defects are more obvious under the production conditions of high speed and low cost. The novel 'internal adding' technology can prevent migration from the source and simplify the process, but when the release functional component is added into the polyester matrix, phase separation and component aggregation are extremely easy to occur due to compatibility difference, so that microscopic protrusions and defects are generated on the surface of the film, the surface roughness is greatly increased, the nondestructive transfer of precise components is interfered, and the optical bonding yield is reduced. Therefore, a release film prepared by internally adding a non-silicon release master batch is developed, so that the surface of the release film is smooth, and the compatibility with polyester is not important to precipitate. The Chinese patent application CN118745282A discloses a PET composition for a heat-insulating film and a preparation method thereof, wherein a PET substrate is added with boron nitride nano-sheets, nano-magnetic powder and silver nano-sheets, and the external magnetic force is utilized to attract the magnetic powder to drive the boron nitride nano-sheets and the silver nano-sheets to move, so that a dense rough microstructure is formed in the PET substrate film, but precipitation risks exist, and the surface roughness is higher. The Chinese patent application CN117143492A discloses a release agent, a preparation method, a release film and a preparation method of the release film, wherein the release force of the release film in the initial and final states is adjusted by adding particles and the ratio of the precipitant in a release agent layer, but the precipitant is separated out, so that the risk of polluting electronic elements exists, and the performance of electronic products is affected. The invention patent CN118810182B discloses a silicon-free release PET film and a preparation method thereof, wherein the silicon-free release PET film sequentially comprises a high polymer wax layer, an intermediate layer and a high polymer wax layer from top to bottom, and the high polymer wax layer adopts polyethylene wax and PET as raw materials, so that the toughness and flame retardant property of the film are improved, but the formed release film is poor in transparency and does not have optical characteristics. Disclosure of Invention In order to develop a release film with integrated performance, a release film prepared by adding a non-silicon release master batch can be directly prepared on the premise of not depending on any surface coating procedure. The film not only completely eliminates the migration pollution risk of silicon and fluorine, but also is compatible with polyester without precipitation, and realizes nano-scale roughness. The first aspect of the invention provides a non-silicone release master batch added internally, which is prepared from a raw material including PET resin I, a non-silicone release agent composition and an antioxidant, wherein the non-silicone release agent composition comprises polyester wax and oxidized polyethylene wax. The prior internal-added release master batch has the technical problems that the release function and the surface flatness cannot be considered, because the release agent and the PET resin have obvious differences in molecular polarity, melting property and the like, the interface combination for realizing the nanoscale roughness and stability has technical resistance, and poor compatibility can directly lead to the aggregation of release components in the PET resin and weak interface adhesion. The nano-scale uniform dispersion is difficult to realize, and the problems of phase separation phenomenon, film haze increase and the like are easy to form. The application constructs a release functional phase with uniformly dispersed nanometer scale and stable interface in a Polyester (PET) matrix, and directly obtains the release film with an ultra-flat surface from a material origin. The core is that a bi-component sy