4results about How to "Reduce discoloration" patented technology

This utility model discloses an auxiliary forceps for bonding invisible orthodontic attachments, relating to the technical field of auxiliary forceps for bonding invisible orthodontic attachments. The auxiliary forceps for bonding invisible orthodontic attachments includes a forceps control handle, an additional sleeve, and a fixing block. The auxiliary forceps for bonding invisible orthodontic attachments employs a structure where the additional sleeve is fitted onto a protruding connecting plate of the forceps. The protruding block on the additional sleeve facilitates pressing the attachment, achieving multi-angle pressing with good pressing effect. This product is used to fix the template during the bonding of invisible orthodontic attachments. Because the head is replaceable, it can be used for bonding various attachments in different positions, enhancing the bonding efficiency and accuracy of attachments, improving the fit between the attachment and the tooth, improving the fit between the tooth, attachment, and invisible aligner, improving the removal of excess resin, reducing the probability of air bubbles in the attachment, thereby reducing resin waste and the risk of discoloration and tooth decay caused by excess resin accumulation and plaque.

This utility model discloses a smart watch case with a snap-fit ​​structure, including a watch case base. A bottom shell is fixedly installed at the bottom of the watch case base. Fastening bolts are slidably connected to the four sides of the inner side of the bottom shell. Buttons are fixedly installed at the four corners of the watch case base. A transparent screen is fixedly installed in the center of the top of the watch case base. A locking block is snapped at the four corners of the top of the watch case base. A protective film is fixedly connected to the top of the four locking blocks. Through the locking blocks and the protective film, a protective film can be applied to the transparent screen, which can build a practical protective barrier for the transparent screen. It can effectively resist the scratches, bumps and wear that are unavoidable in daily use, prevent the transparent screen from leaving marks due to friction from hard objects such as keys and tabletops, and maintain the original smooth texture of the transparent screen. At the same time, the protective film can isolate the direct corrosion of stains such as sweat, oil, and dust, and reduce the oxidation, discoloration or staining of the transparent screen that is difficult to clean.

This utility model relates to a device for continuous clean transfer and sterilization of powders, comprising: a sterilization chamber, a feeding device, a heating device, a first collection tank, a second collection tank, and a motor. The sterilization chamber is externally connected to a cylinder and internally contains several stirring paddles. A valve is provided between the sterilization chamber and the cylinder. The sterilization chamber, stirring paddles, and motor are connected to other components via a rotary sealing coupling. This device solves the problems of low sterilization efficiency, easy deterioration of material quality, and risk of secondary contamination in existing sterilization chamber devices, achieving highly efficient sterilization of granular powders while maximizing the stability of the material's effective components and original quality.

An environmentally friendly wood bleaching treatment method using ultraviolet photocatalysis is disclosed, belonging to the field of wood bleaching. This invention aims to solve the problems of low efficiency, yellowing of bleached wood, excessive bleaching waste liquid, and severe reduction in mechanical properties associated with existing bleaching methods. The treatment method includes: 1. Coating with bleaching solution; 2. Catalytic bleaching. This invention is used for environmentally friendly wood bleaching treatment using ultraviolet photocatalysis.