Degumming and recycling method of PET (Polyethylene Glycol Terephthalate) protective film waste
A technology of polyethylene terephthalate and ethylene phthalate, which is applied in the field of renewable waste recycling, can solve problems such as increasing processing costs, and achieves simple operation, short technological process and small environmental impact. Effect
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Embodiment 1
[0036] Such as figure 1 As shown, the degumming recovery method of the polyethylene terephthalate protective film waste provided by the embodiment of the present invention comprises the following steps:
[0037] (1) adding the PET protective film waste into the pulverizer to be pulverized into fragments with a particle size of 1 cm;
[0038] (2) Taking the PET protective film waste containing three kinds of adhesives as an example, an appropriate amount of degumming reagents A, B and C were respectively configured in three cooking pots, wherein, reagent A was ethanol, and reagent B was ethanol and sodium hydroxide The mixed reagent of composition, reagent C is the mixed reagent that ethanol and oxalic acid form;
[0039] (3) Step-by-step degumming process: first put the waste film fragments into a cooking pot containing reagent A, heat at 80°C for 1 hour, and keep stirring until one type of adhesive a swells and detaches, then transfer the mixed solution into Centrifuge to s...
Embodiment 2
[0045] Such as figure 1 As shown, the degumming recovery method of the polyethylene terephthalate protective film waste provided by the embodiment of the present invention comprises the following steps:
[0046] (1) adding the PET protective film waste into the pulverizer and being pulverized into fragments with a particle size of 5 cm;
[0047] (2) Taking the PET protective film waste containing three adhesives as an example, an appropriate amount of degumming reagents A, B, and C were respectively configured in three cooking pots, wherein, reagent A was N-methylpyrrolidone, and reagent B was four A mixed reagent composed of vinyl chloride and sodium ethylate, reagent C is a mixed reagent composed of N-methylpyrrolidone and boric acid;
[0048] (3) Step-by-step degumming process: first put the waste film fragments into a cooking pot containing reagent A, heat at 120°C for 0.5h, and keep stirring until one type of adhesive a swells and detaches, then transfer the mixed soluti...
Embodiment 3
[0054] Such as figure 1 As shown, the degumming recovery method of the polyethylene terephthalate protective film waste provided by the embodiment of the present invention comprises the following steps:
[0055] (1) adding the PET protective film waste into the pulverizer and being pulverized into fragments with a particle size of 3 cm;
[0056] (2) Taking the PET protective film waste containing three kinds of adhesives as an example, an appropriate amount of degumming reagents A, B and C were respectively configured in three cooking pots, wherein, reagent A was ethyl acetate, and reagent B was N, N A mixed reagent composed of dimethylacetamide and tetramethylethylenediamine, reagent C is a mixed reagent composed of acetone and tartaric acid;
[0057] (3) Step-by-step degumming process: first put the waste film fragments into a cooking pot containing reagent A, heat at 60°C for 0.5h, and keep stirring until one type of adhesive a swells and detaches, then stops degumming, an...
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Abstract
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