Degradable disposable mouthpiece and preparation method
A mouthpiece, disposable technology, used in dilators, surgery, etc., to save electricity
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[0032] Example 1 Injection molding method of degradable disposable mouthpiece:
[0033] The first step, vacuum drying: the degradable substrate pellets of formula 1, formula 2 or formula 3 are vacuum-dried at 50° C. for 3.30 hours before use.
[0034] The second step, injection molding: add the dried degradable substrate pellets of formula 1, formula 2 or formula 3 to an injection molding machine for injection molding.
[0035] The barrel temperature is set to: 150°C for the feed port, 160°C for the compression section, 170°C for the metering section, and 165°C for the nozzle;
[0036] The mold temperature is: 25℃;
[0037] The injection pressure is: 75pa for the first section, 80Mpa for the second section, and 50Mpa for the third section;
[0038] Injection time: 40 seconds;
[0039] Holding time: 0 seconds;
[0040] The screw speed is: 180 rpm.
[0041] A degradable disposable mouthpiece using the degradable base material of formula 1, formula 2 or formula 3 is obtained...
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