Invisible orthodontic special three-layer co-pressure composite membrane and preparation method thereof

A composite diaphragm, invisible orthodontic technology, applied in the field of invisible orthodontic treatment materials, can solve the problems of unsatisfactory treatment effect of invisible appliances, low stress relaxation rate, high stress relaxation rate, etc., so as to improve wearing experience and improve strength and impact properties, the effect of low stress relaxation rate

Active Publication Date: 2020-07-31
BEIJING UNIV OF CHEM TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is 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 made by the existing diaphragm, and to provide a dedicated invisible aligner. Three-layer co-pressed composite membrane with high strength, high elasticity, high transparency and low stress relaxation rate, its preparation method and application

Method used

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  • Invisible orthodontic special three-layer co-pressure composite membrane and preparation method thereof
  • Invisible orthodontic special three-layer co-pressure composite membrane and preparation method thereof
  • Invisible orthodontic special three-layer co-pressure composite membrane and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] This embodiment provides a special three-layer co-pressed composite diaphragm for invisible correction, which has a three-layer structure. The outer layer A is PETG-BR003 from Eastman Chemical Company of the United States with a thickness of 0.2mm and a hardness of 72D, and the middle layer B is 0.5mm thick. The PVC-S-700 of Qilu Petrochemical Co., Ltd., the outer layer C is PP-180R of Korea SKM Company with a thickness of 0.2mm.

[0026] The preparation process of the three-layer co-pressed composite diaphragm for invisible correction is as follows: figure 2 As shown, the details are as follows: (a) Drying: PETG-BR003 from Eastman Chemical Company of the United States was dried at 70°C for 4 hours for later use, and PVC-S-700 of Qilu Petrochemical was dried at 70°C for 4 hours for later use. PP-180R was dried at 90°C for 4 hours for later use; (b) cutting and lamination: cut the dried PETG, PVC and PP into discs of the same size, then cleaned the surface with ethanol ...

Embodiment 2

[0029] Repeat embodiment 1, difference is: the thickness of top layer PETG-BR003 is controlled at 0.25mm, the thickness of middle layer PVC-S-700 is at 0.6mm, and the thickness of outer layer PP-180R is controlled at 0.15mm. In addition, during the drying process, PETG-BR003 was dried at 85°C for 5 hours, PVC-S-700 was dried at 85°C for 5 hours, and PP-180R was dried at 105°C for 5 hours; during the tableting process, the mold was preheated When the temperature reaches 160°C, put PETG-BR003 between the polyester film layers for preheating, the pressure is 3MPa, and the time is 2min. The outer layer of PP is placed on the two layers of materials for preheating and pressing, the steps are the same as above, and finally hot pressing at a pressure of 8MPa for 3 minutes, and at the same time, the deflation operation is performed every 10s to release the gas between the materials , the final hot pressing time is 6min. Then the laminated material is cold-pressed under a flat vulcani...

Embodiment 3

[0032] Repeat Example 1, the difference is: the thickness of the surface layer PETG-BR003 is controlled at 0.3mm, the thickness of the middle layer PVC-S-700 is controlled at 0.45mm, and the thickness of the outer layer PP-180R is controlled at 0.3mm. In addition, during the drying process, PETG-BR003 was dried at 100°C for 6 hours, PVC-S-700 was dried at 100°C for 6 hours, and PP-180R was dried at 120°C for 6 hours; during the tableting process, the mold was preheated When the temperature reaches 170°C, put PETG-BR003 between the polyester film layers for preheating, the pressure is 4MPa, and the time is 2min. The outer layer of PP is placed on the two layers of materials for preheating and pressing, the steps are the same as above, and finally hot pressing at a pressure of 10MPa for 4 minutes, and at the same time, the deflation operation is performed every 10s to release the gas between the materials , the final hot pressing time is 8min. Then the laminated material is col...

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Abstract

The invention relates to an invisible orthodontic special three-layer co-pressure composite membrane and a preparation method and application thereof. The technical problems that an existing membraneis poor in transparency, low in tensile strength, poor in toughness and elasticity and large in stress relaxation rate, and the treatment effect of a manufactured invisible orthodontic device is not ideal enough are solved, and the composite membrane comprises: an outer layer A which is a transparent thermoplastic polyurethane layer or a polyethylene terephthalate-1, 4-cyclohexanedimethanol esterlayer; the middle layer B that is a polyethylene glycol terephthalate layer or a polyvinyl chloride layer; and the outer layer C that is a polypropylene layer or a polycarbonate layer. The invention also discloses a preparation method and application of the composite membrane. The invention can be applied to the field of preparation of brace materials.

Description

technical field [0001] The invention relates to a tooth invisible orthodontic treatment material, in particular to a transparent polymer tooth cover orthodontic material for tooth treatment. Background technique [0002] Orthodontics is the treatment of malocclusion through orthodontics or surgery. Malocclusion refers to the deformity of teeth, jaws, and craniofacial defects caused by congenital or acquired factors during the growth and development of children. The teeth are uneven. [0003] Uneven teeth can cause many problems. First, it seriously affects the normal function of the oral cavity, mainly affecting our chewing, pronunciation, swallowing, and breathing functions. Secondly, it seriously affects the health of the periodontal tissue and oral hygiene. The irregular dentition, especially the crowded teeth, on the one hand makes the oral plaque easy to adhere, and on the other hand, it is difficult to clean because the toothbrush is difficult to touch. Therefore, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/30B32B27/32B32B27/36B32B27/40B32B37/06B32B37/10A61C7/08A61L31/12A61L31/14A61L31/06A61L31/04
CPCA61C7/08A61L31/048A61L31/06A61L31/14B32B27/08B32B27/304B32B27/32B32B27/36B32B27/365B32B27/40B32B37/06B32B37/08B32B37/10B32B2250/24B32B2307/412B32B2307/51B32B2309/02B32B2309/04B32B2309/12B32B2535/00C08L67/03C08L75/04C08L69/00C08L27/06C08L23/12
Inventor 丁雪佳李鹏飞刘春良
Owner BEIJING UNIV OF CHEM TECH
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