Teeth whitening strip and preparation method thereof
A tooth whitening strip and whitening agent technology, applied in the field of oral care, can solve the problems of poor water resistance of the tooth strip gel layer, poor product stability over time, and collapse of the gel skeleton structure, achieving good product stability and preparation The method is simple and easy, and the production cost is low
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[0027] Among them, the preparation method of Example 1 tooth whitening paste, each raw material according to the weight percentage in Table 1, includes the following steps:
[0028] (1) Mix the polyether thermoplastic polyurethane elastomer, PEG-40 hydrogenated castor oil and glycerin uniformly, heat to 130°C to completely dissolve to obtain agent A, and cool to 70°C for use;
[0029] (2) Dissolve polyvinylpyrrolidone in absolute ethanol to obtain agent B, add agent B to agent A, stir uniformly, and after cooling to 25°C, add hydrogen peroxide and mix uniformly to obtain a mixed viscous colloid;
[0030] (3) Coating the mixed viscous colloid on the peeling backing layer, covering it with a plastic film layer, and preparing a whitening tooth paste through the processes of slitting, creasing, waste collection and cutting.
Example Embodiment
[0031] Example 2 The preparation method of tooth whitening paste, each raw material according to the weight percentage in Table 1, includes the following steps:
[0032] (1) Mix the polyether thermoplastic polyurethane elastomer, PEG-40 hydrogenated castor oil, polysorbate-20, glycerin, propylene glycol and butylene glycol uniformly, and heat to 140°C to completely dissolve to obtain agent A, and cool to 75℃, spare;
[0033] (2) Dissolve polyvinylpyrrolidone in absolute ethanol to obtain agent B, add agent B to agent A, stir uniformly, and after cooling to 28°C, add hydrogen peroxide and mix uniformly to obtain a mixed viscous colloid;
[0034] (3) Coating the mixed viscous colloid on the peeling backing layer, covering it with a plastic film layer, and preparing a whitening tooth paste through the processes of slitting, creasing, waste collection and cutting.
Example Embodiment
[0035] Example 3 The preparation method of tooth whitening paste, each raw material according to the weight percentage in Table 1, includes the following steps:
[0036] (1) Mix the polyether thermoplastic polyurethane elastomer, PEG-60 hydrogenated castor oil, cocoeth-7, glycerin and polyethylene glycol uniformly, and heat to 150°C to completely dissolve to obtain agent A, and cool to 80℃, spare;
[0037] (2) Dissolve polyvinylpyrrolidone, carrageenan and sodium carboxymethyl cellulose in absolute ethanol to obtain agent B, add agent B to agent A, stir evenly, and then add hydrogen peroxide after cooling to 30°C Mix evenly to obtain mixed viscous colloid;
[0038] (3) Coating the mixed viscous colloid on the peeling backing layer, covering it with a plastic film layer, and preparing a whitening tooth paste through the processes of slitting, creasing, waste collection and cutting.
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