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CN-118617835-B - High-haze PETG extinction transfer film and preparation method thereof

CN118617835BCN 118617835 BCN118617835 BCN 118617835BCN-118617835-B

Abstract

The invention provides a high-haze PETG extinction transfer film and a preparation method thereof, and relates to the technical field of extinction transfer film preparation. A high-haze PETG extinction transfer film comprises an upper surface layer, a core layer and a lower surface layer. The upper surface layer comprises the following raw materials, by mass, 40-60 parts of PETG, 1-3 parts of an antioxidant and 0.5-2 parts of an antistatic agent. The core layer comprises the following raw materials, by mass, 60-90 parts of PETG, 5-12 parts of matting agent, 0.5-2 parts of nucleating agent and 0.1-1 part of antioxidant. The lower surface layer comprises the following raw materials, by mass, 40-60 parts of PETG and 1-5 parts of a pore-forming agent. The PETG extinction transfer film prepared by the invention has high haze.

Inventors

  • QI XIANFENG
  • WANG ZHAOZHONG
  • WANG JINBAO
  • Fang Baoguo
  • YU JIAN
  • Su Kangshun
  • WANG JIAN

Assignees

  • 安徽金田高新材料股份有限公司

Dates

Publication Date
20260508
Application Date
20240626

Claims (9)

  1. 1. The high-haze PETG extinction transfer film is characterized by comprising an upper surface layer, a core layer and a lower surface layer, wherein the core layer comprises the following raw materials in parts by mass, 60-90 parts of PETG, 5-12 parts of extinction agent, 0.5-2 parts of nucleating agent and 0.1-1 part of antioxidant; the preparation method of the flatting agent comprises the following steps of immersing silicon dioxide in titanium tetrachloride solution, drying to obtain pretreated silicon dioxide, uniformly mixing tetrabutyl titanate, tetrahydrofuran, hydrochloric acid and water to obtain mixed solution, adding the pretreated silicon dioxide into the mixed solution, uniformly mixing, carrying out sectional calcination to obtain mixed materials, uniformly mixing the mixed materials with a silane coupling agent, and drying to obtain the flatting agent.
  2. 2. The high-haze PETG extinction transfer film according to claim 1, wherein the concentration of the titanium tetrachloride solution is 0.05-2M, the mass ratio of the silicon dioxide to the titanium tetrachloride solution is 1 (1-2), and the drying temperature is 80-105 ℃.
  3. 3. The high-haze PETG extinction transfer film according to claim 1, wherein the mass ratio of tetrabutyl titanate, tetrahydrofuran, hydrochloric acid and water is (0.5-1): 2-5): 10-20.
  4. 4. The high-haze PETG extinction transfer film according to claim 1, wherein the mass ratio of the mixed solution to the pretreated silica is 10 (0.5-3).
  5. 5. The high-haze PETG extinction transfer film according to claim 1, wherein the staged calcination comprises the steps of reacting for 1-2h under the temperature T1, heating to the temperature T2 for 4-8h, reacting the mixed material for 6-12h under the temperature T3 under the inert atmosphere, wherein the temperature T1 is 30-50 ℃, the temperature T2 is 70-100 ℃, and the temperature T3 is 150-200 ℃.
  6. 6. The high-haze PETG extinction transfer film according to claim 1, wherein the upper surface layer comprises the following raw materials, by mass, 40-60 parts of PETG, 1-3 parts of an antioxidant and 0.5-2 parts of an antistatic agent.
  7. 7. The high-haze PETG extinction transfer film according to claim 1, wherein the lower surface layer comprises the following raw materials, by mass, 40-60 parts of PETG and 1-5 parts of an opening agent.
  8. 8. A process for preparing the high-haze PETG extinction transfer film according to any one of claims 1-7, which is characterized by comprising the steps of respectively and uniformly mixing the raw materials of an upper surface layer, a core layer and a lower surface layer, extruding to obtain a melt, and compounding, casting, longitudinal drawing, transverse drawing, rolling and slitting the melt to obtain the high-haze PETG extinction transfer film.
  9. 9. The method according to claim 8, wherein the preheating temperature in the transverse drawing is 75-85 ℃, the stretching temperature is 80-90 ℃, the shaping temperature is 80-90 ℃, the cooling temperature is 10-50 ℃, and the stretching ratio of the transverse drawing is 4-5 and the stretching angle is 3.5-4.5 ℃.

Description

High-haze PETG extinction transfer film and preparation method thereof Technical Field The invention relates to the technical field of extinction transfer film preparation, in particular to a high-haze PETG extinction transfer film and a preparation method thereof. Background PETG is a clear, non-crystalline copolyester, and a common comonomer for PETG is 1, 4-cyclohexanedimethanol (CHDM, cylclohexylenedimethylene), known collectively as polyethylene terephthalate-1, 4-cyclohexanedimethanol. It is a product of polycondensation of three monomers of terephthalic acid (PTA), ethylene Glycol (EG) and 1, 4-Cyclohexanedimethanol (CHDM) by transesterification. Along with the increasing demand of the market for the haze of PETG extinction transfer films, the haze of the PETG extinction transfer films on the market at present cannot meet the demand, so that development of a PETG extinction transfer film is needed, and the PETG extinction transfer film has great significance for the wide application of the PETG extinction transfer films. Disclosure of Invention Based on the technical problems in the background technology, the invention provides a high-haze PETG extinction transfer film and a preparation method thereof. The invention provides a high-haze PETG extinction transfer film which comprises an upper surface layer, a core layer and a lower surface layer. The upper surface layer comprises the following raw materials, by mass, 40-60 parts of PETG, 1-3 parts of an antioxidant and 0.5-2 parts of an antistatic agent. The core layer comprises the following raw materials, by mass, 60-90 parts of PETG, 5-12 parts of matting agent, 0.5-2 parts of nucleating agent and 0.1-1 part of antioxidant. Preferably, the preparation method of the matting agent comprises the following steps: Soaking silicon dioxide in titanium tetrachloride solution, drying to obtain pretreated silicon dioxide, uniformly mixing tetrabutyl titanate, tetrahydrofuran, hydrochloric acid and water to obtain a mixed solution, adding the pretreated silicon dioxide into the mixed solution, uniformly mixing, carrying out sectional calcination to obtain a mixed material, uniformly mixing the mixed material with a silane coupling agent, and drying to obtain the matting agent. More preferably, the concentration of the titanium tetrachloride solution is 0.05-2M. More preferably, the mass ratio of the silicon dioxide to the titanium tetrachloride solution is 1 (1-2). More preferably, the drying temperature is 80-105 ℃. More preferably, the mass ratio of tetrabutyl titanate, tetrahydrofuran, hydrochloric acid and water is (0.5-1): 2-5): 10-20: (10-20). More preferably, the mass ratio of the mixed solution to the pretreated silicon dioxide is 10 (0.5-3). More preferably, the silica is nano silica with a particle size of 5-80nm. More preferably, the step of calcining comprises reacting for 1-2h under T1 temperature, heating to T2 temperature for 4-8h, and reacting the mixture for 6-12h under T3 temperature in inert atmosphere. More preferably, the T1 temperature is 30-50 ℃, the T2 temperature is 70-100 ℃, and the T3 temperature is 150-200 ℃. More preferably, the silane coupling agent is KH550. The lower surface layer comprises the following raw materials, by mass, 40-60 parts of PETG and 1-5 parts of a pore-forming agent. Preferably, the opening agent is selected from one or more of silicon dioxide, calcium carbonate and artificial talcum. The invention also provides a preparation method of the high-haze PETG extinction transfer film, which comprises the following steps of respectively and uniformly mixing and extruding the raw materials of the upper surface layer, the core layer and the lower surface layer to obtain a melt, and carrying out compounding, sheet casting, longitudinal drawing, transverse drawing, rolling and slitting on the melt to obtain the high-haze PETG extinction transfer film. Preferably, the preheating temperature in transverse drawing is 75-85 ℃, the stretching temperature is 80-90 ℃, the shaping temperature is 80-90 ℃, and the cooling temperature is 10-50 ℃. Preferably, the stretching ratio of the transverse stretching is 4-5, and the stretching angle is 3.5-4.5 degrees. The invention has the beneficial effects that: The invention provides a high-haze PETG extinction transfer film which comprises an upper surface layer, a core layer and a lower surface layer. According to the invention, the matting agent is added into the core layer, so that the haze of the PETG matting transfer film is improved, and the matting agent has compatibility with the PETG, so that the haze of the PETG matting transfer film prepared by the method is uniform. The invention provides a preparation method of high-haze PETG extinction transfer, which improves the haze of a PETG extinction transfer film by reasonably adjusting parameters of a transverse drawing process. Detailed Description The technical scheme of the invention is described in detail through specific embo