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Layer-by-layer laminated composite membrane for invisible orthodontic correction and preparation method and application of layer-by-layer laminated composite membrane

A composite diaphragm, invisible orthodontic technology, applied in chemical instruments and methods, orthodontics, layered products, etc., can solve the problems of unsatisfactory treatment effect of invisible appliances, poor toughness and elasticity, low stress relaxation rate, etc. , to achieve the effect of low stress relaxation rate, good mechanical properties, stress relaxation rate and reduced water absorption

Pending Publication Date: 2022-06-07
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention aims to solve the technical problems of poor transparency, low tensile strength, poor toughness and elasticity, high stress relaxation rate and unsatisfactory treatment effect of the invisible aligner existing in the existing invisible aligner, and provides a High-strength, high-elasticity, high-transparency, low-stress-relaxation high-strength, high-elasticity, high-transparency, low-stress relaxation rate layer-by-layer laminated composite membrane for invisible orthodontic correction and its preparation method

Method used

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  • Layer-by-layer laminated composite membrane for invisible orthodontic correction and preparation method and application of layer-by-layer laminated composite membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0035] This embodiment provides a layer-by-layer laminated composite diaphragm for invisible orthodontics, which has a three-layer structure. Silicon oxide modified PETG-BR003 of Eastman Chemical Company, USA, outer layer C is PC-2858 of German Bayer Company with a thickness of 0.45mm. Nano-silica is HG-NMEYHG from Shanghai Huijing Sub-nano New Materials Co., Ltd., and its specific surface texture is 185m. 2 / g, the average particle size is 40nm, and the content is more than 99.8%.

[0036] The preparation method of the layer-by-layer laminated composite film for invisible orthodontic treatment provided by the present invention comprises the following steps: (a) drying: the German Bayer company TPU-8798A is dried at 85 DEG C for 4h for standby use, and the American Eastman Chemical Company PETG-BR003 Dry treatment at 90 °C for 4 h for use, and dry and treat PC-2858 at 100 °C for 4 h at 100 °C for use; (b) Nano-silica surface treatment: Nano-silica (SiO 2 ) in a vacuum drying...

Embodiment 2

[0039] Example 1 was repeated, except that the thickness of the outer layer TPU-8798A was controlled at 0.25mm, the thickness of the middle layer PETG-BR003 was controlled at 0.35mm, and the thickness of the outer layer PC-2858 was controlled at 0.40mm.

[0040] The obtained dried hot-pressed film sheet was subjected to various performance tests, and the results are shown in Table 1.

Embodiment 3

[0042] Example 1 was repeated, except that the thickness of outer layer TPU-8798A was controlled at 0.35mm, the thickness of middle layer PETG-BR003 was controlled at 0.30mm, and the thickness of outer layer PC-2858 was controlled at 0.35mm.

[0043] The obtained dried hot-pressed film sheet was subjected to various performance tests, and the results are shown in Table 1.

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Abstract

The invention relates to a layer-by-layer laminated composite membrane for invisible orthodontic correction as well as a preparation method and application of the layer-by-layer laminated composite membrane, and solves the technical problems that an existing invisible orthodontic correction membrane is poor in transparency, relatively low in tensile strength, poor in toughness and elasticity and large in stress relaxation rate, and a prepared invisible orthodontic appliance is not ideal in treatment effect. A thermoplastic polyurethane layer and a polycarbonate layer are respectively arranged on the two sides; and the middle layer is a nano silicon dioxide modified polyethylene glycol terephthalate-1, 4-cyclohexanedimethanol ester layer. The method can be used for preparing orthodontic materials.

Description

technical field [0001] The invention relates to a polymer material and a preparation method thereof, in particular to a layer-by-layer laminated composite film for invisible orthodontic correction and a preparation method thereof. Background technique [0002] Orthodontics is the treatment of malocclusion through orthodontic or surgical methods. Malocclusion refers to the deformity of teeth, jaws, and craniofacial and uneven teeth caused by congenital or acquired factors during the growth and development of children. [0003] Uneven teeth can cause many problems. First of all, it seriously affects the normal functioning of the oral cavity, mainly affecting our chewing, pronunciation, swallowing and breathing functions. Secondly, it seriously affects the health of periodontal tissue and oral hygiene. The uneven dentition, especially crowded teeth, makes the oral plaque easy to adhere to, and on the other hand, it is difficult to clean because the toothbrush is difficult to to...

Claims

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Application Information

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IPC IPC(8): B32B27/36B32B27/40B32B27/08C08L67/02C08K9/06C08K3/36C08J5/18B29C43/14B29C69/00
CPCB32B27/36B32B27/40B32B27/08C08J5/18B29C43/006B29C43/003B29C43/146B29C69/001B32B27/365A61C7/08C08J2367/02C08K2201/011C08K9/06C08K3/36B32B2307/412
Inventor 丁雪佳刘金燕李鹏飞宋长统吴勇振李阳
Owner BEIJING UNIV OF CHEM TECH