Antibacterial colored polyester film for food packaging and preparation method thereof
A technology for polyester film and food packaging, applied in the field of polyester film, can solve the problems of poor low-temperature heat sealability and limited application scope of polyester film, and achieve the effect of being conducive to preservation and good antibacterial and bacteriostatic effect.
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Embodiment 1
[0025] A preparation method for antibacterial colored polyester film for food packaging, comprising the following steps:
[0026] (1) After cleaning the oregano grass, dry it, crush it, disperse it in absolute ethanol, carry out ultrasonic dispersion, then soak it in it for 24 hours, and then undergo microwave treatment for 4 minutes with a microwave power of 800W, centrifuge and collect the supernatant , washing the solid matter with absolute ethanol three times, collecting the washing solution and mixing it with the supernatant, and concentrating by atmospheric distillation to obtain the oregano extract;
[0027] (2) Add ethyl silicate dropwise to the ethanol solution of tetrabutyl titanate, stir vigorously, then add dropwise a mixture of glacial acetic acid and absolute ethanol to form a transparent sol and let it stand for 60 hours, then dry it, grind it Calcined at 630°C for 6h to obtain SiO 2 / TiO 2 Composite materials, where SiO 2 and TiO 2 The mass ratio of the sol...
Embodiment 2
[0033] A preparation method for antibacterial colored polyester film for food packaging, comprising the following steps:
[0034] (1) After cleaning the oregano grass, dry it, crush it, disperse it in absolute ethanol, carry out ultrasonic dispersion, then soak it in it for 36 hours, and then undergo microwave treatment for 5 minutes, the microwave power is 800W, centrifuge and collect the supernatant , washing the solid matter with absolute ethanol three times, collecting the washing liquid and mixing it with the supernatant, and concentrating by atmospheric distillation to obtain the oregano extract;
[0035] (2) Add ethyl silicate dropwise to the ethanol solution of tetrabutyl titanate, stir vigorously, then add dropwise a mixture of glacial acetic acid and absolute ethanol to form a transparent sol and let it stand for 72 hours, then dry it and grind it Calcined at 630°C for 6h to obtain SiO 2 / TiO 2 Composite materials, where SiO 2 and TiO 2 The mass ratio of the solu...
Embodiment 3
[0041] A preparation method for antibacterial colored polyester film for food packaging, comprising the following steps:
[0042] (1) After cleaning the oregano grass, dry it, crush it, disperse it in absolute ethanol, carry out ultrasonic dispersion, then soak it in it for 24 hours, and then undergo microwave treatment for 5 minutes, the microwave power is 800W, centrifuge and collect the supernatant , washing the solid matter with absolute ethanol three times, collecting the washing solution and mixing it with the supernatant, and concentrating by atmospheric distillation to obtain the oregano extract;
[0043] (2) Add ethyl silicate dropwise to the ethanol solution of tetrabutyl titanate, stir vigorously, then add dropwise a mixture of glacial acetic acid and absolute ethanol to form a transparent sol and let it stand for 60 hours, then dry it, grind it Calcined at 630°C for 6h to produce SiO 2 / TiO 2 Composite materials, where SiO 2 and TiO 2 The mass ratio of the solu...
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