Antibacterial thermoplastic polyurethane net film for garments and method for preparing antibacterial thermoplastic polyurethane net film
A thermoplastic polyurethane and antibacterial technology, which is applied in the field of antibacterial thermoplastic polyurethane hot-melt adhesive film for clothing and its preparation, can solve the problem that the thermoplastic polyurethane film cannot have both antibacterial and adhesive properties, and is difficult to meet the needs of applications in related fields. and other problems, to achieve the effect of excellent antibacterial effect, good adhesive strength and excellent antibacterial property
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[0029] (1) Chitosan-Ag + Preparation of the complex:
[0030] Add 10 parts by mass of chitosan (molecular weight 100,000 g / mol, degree of deacetylation 90%, Zhengzhou Givaudan Chemical Products Co., Ltd.) into 100 parts by mass of an acetic acid solution with a mass concentration of 3%, and hold at 60°C. Heat on a water bath until the dissolution is complete, and the resulting solution is separated to remove impurities. Chitosan acetic acid solution under the protection of nitrogen, add 1mol / L sodium hydroxide aqueous solution to adjust the pH to neutral; after 30 minutes, add 0.2 mass parts of silver nitrate (Suzhou Fulu Biotechnology Co., Ltd.), stir at 60°C Reaction for 5 hours; centrifugal washing, vacuum drying at 70°C for 24 hours to obtain chitosan-Ag+ complex, which is ready for use.
[0031] (2) Preparation of antibacterial thermoplastic polyurethane membrane for clothing:
[0032] The raw materials involved in Examples 1 to 5 are shown in Table 1 below:
[0033] Table 1: P...
Example Embodiment
[0040] Example 1
[0041] According to the mass parts of the raw material components of Example 1 shown in Table 1, the polyester polyol and additives were fully blended and heated to 110°C; the diisocyanate was heated to 55°C for insulation; the chain extender was heated to 60°C for insulation. The heated raw material components are added to the twin-screw extruder at an addition rate of 250-300kg / h through the mixing feeding system, the catalyst is added to the filling port of the twin-screw extruder, and the shell polymer is added to the feeding port. After the sugar-Ag+ complex, the various components are copolymerized in the screw, and then pelletized and dried under water to obtain the antibacterial thermoplastic polyurethane for clothing retina.
[0042] Among them, the screw temperature is 160°C, the screw speed is 80 rpm, and the twin screw length to diameter ratio is 40:1;
[0043] The temperature of the die head is 150℃, the water temperature of the pelletizing system is ...
Example Embodiment
[0044] Example 2
[0045] According to the mass parts of the raw material components of Example 2 shown in Table 1, the polyester polyol and additives were fully blended and heated to 110°C; the diisocyanate was heated to 55°C for insulation; the chain extender was heated to 60°C for insulation. The heated raw material components are added to the twin-screw extruder at an addition rate of 250-300kg / h through the mixing feeding system, the catalyst is added to the filling port of the twin-screw extruder, and the shell polymer is added to the feeding port. After the sugar-Ag+ complex, the various components are copolymerized in the screw, and then pelletized and dried under water to obtain the antibacterial thermoplastic polyurethane for clothing retina.
[0046] Among them, the screw temperature is 140°C, the screw speed is 130 rpm, and the twin screw length to diameter ratio is 45:1;
[0047] The temperature of the die head is 130°C, the water temperature of the pelletizing system i...
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