PETG composites, its preparation method and applicationTechnical field
The present invention relates to technical field of polymer materials, more particularly to a kind of PETG composites, its preparation method and shouldWith.
Background technology
Tooth is uneven also known as deformity of grinding one's teeth, refer to children in growth and development process, by inborn inherent cause or the day after tomorrowEnvironmental factor, such as disease, oral habit, the deformity for tooth tooth, jawbone, cranium face caused by abnormal.
With the development of medical technology, many correction patients can be by wearing appliance come straightening of teeth.ApplianceIt is a kind of device for treating malocclusion, orthodontic appliance can be claimed.Power can be acted, or the function of all flesh of masseter mouthful is madeJawbone, malposed tooth and the Periodontal Supporting Tissue for firmly making deformity by appliance change, and are beneficial to jaw normal growthDevelopment.Known dental appliance has two kinds, and one kind is denture appliance, particularly by various metal parts for ring, annexIt is adhesively fixed on each tooth, by various arch wires, spring song, the bracket on fixing teeth is ligatured with ligatureOn, the power straightening of teeth formed with ligature, this correcting technology has the disadvantages that：One is the time long, typically all in 2 yearsMore than, further consultation interval time is short, it is necessary to take patient's more time to complete correcting process；Two is to easily cause tooth trouble, fixedCorrection needs to install more apparatus for correcting intraoral, gives people the sensation of " embolum copper tooth ", the bad maintenance of oral hygiene, Ke NengzaoInto gingivitis, tooth discoloration, tooth demineralization, canker sore etc..Put on the tooth of bracket or tooth silk, it is easy to block food residualSlag, is also easy to be produced with mucous membrane of mouth friction the sensation for not accommodating pain, and influence attractive in appearance.Another kind is invisible orthotic device,Correction patient carries out orthodontic by wearing without bracket stealth dental appliance.When just starting to wear appliance, applianceOrthodontic force can be than more aggressive, but over time, due to appliance material, the screen resilience of appliance was at two weeksIt is interior progressively to disappear, specific visible Fig. 1.I.e. the Orthodontic force of appliance can fade away in two weeks, need more to renew after two weeksAppliance increase Orthodontic force again.
In sum, there is provided a kind of dental appliance of long service life is the problem of our urgent need to resolve current.
The content of the invention
One purpose of embodiment of the present invention is to provide a kind of PETG composites.
Another purpose of embodiment of the present invention is the preparation method for providing above-mentioned PETG composites.
Embodiment of the present invention further an object is that providing the application of above-mentioned PETG composites.
In order to solve the above technical problems, embodiments of the present invention provide a kind of PETG composites, the PETG is combinedMaterial is included in terms of weight/mass percentage composition：
PETG resins 80~90%；
Carbon nano-fiber 5~10%；
Auxiliary agent 5~10%.
Preferably, the auxiliary agent is plasticizer, lubricant, antioxidant and bulking agent.
Embodiments of the present invention also provide this kind of preparation method of PETG composites, and the method includes the steps of：
(1) weighed in terms of weight/mass percentage composition：
PETG resins 80~90%；
Carbon nano-fiber 5~10%；
Auxiliary agent 5~10%；
(2) by after PETG resin dehumidifying dryings, carbon nano-fiber, auxiliary agent are added, is well mixed to obtain mixture；
(3) by mixture at 150 DEG C~260 DEG C after plasticizing, cooling, press mold is into diaphragm.
Further, the dehumidifying drying step in step (2) is：Dehumidifying drying 3~5 hours at 65 DEG C~75 DEG C.
Embodiments of the present invention also provide application of the above-mentioned PETG composites in dental appliance is prepared.
Specifically, embodiments of the present invention additionally provide it is a kind of comprising above-mentioned PETG composites without bracket stealth toothTooth appliance.
Embodiment of the present invention in terms of existing technologies, because carbon nano-fiber is in normal temperature and the environment of humidityIn be not in any contraction, so that by comprising carbon nano-fiber PETG composites prepare dental appliance returnElastic force rate of decay is substantially reduced, and improve dental appliance rescues efficiency, so as to realize extending the dental appliance life-spanPurpose.
Brief description of the drawings
Fig. 1 is the screen resilience curve map of existing dental appliance；
Fig. 2 is the screen resilience curve map of the dental appliance comprising the PETG composites in embodiment of the present invention；
Fig. 3 is the preparation technology flow chart without bracket stealth dental appliance in third embodiment of the invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to each reality of the inventionThe mode of applying is explained in detail.However, it will be understood by those skilled in the art that in each implementation method of the invention,In order that reader more fully understands the application and proposes many ins and outs.But, even if without these ins and outs and baseMany variations and modification in following implementation method, it is also possible to realize the application technical scheme required for protection.
First embodiment of the invention is related to a kind of preparation method of PETG composites, and the method includes following stepSuddenly：
(1) weighed in terms of weight/mass percentage composition：
PETG resins 80%；
Carbon nano-fiber 10%；
Auxiliary agent 10%；
Specifically, the auxiliary agent can be plasticizer, lubricant, antioxidant and bulking agent.
(2) PETG resins after dehumidifying drying 3 hours, are added into carbon nano-fiber, auxiliary agent at 65 DEG C, is mixed in high mixerConjunction is uniform to obtain mixture；
(3) by mixture after plasticizing, cooling at 150 DEG C, diaphragm of the press mold into production appliance.
Second embodiment of the present invention is related to a kind of preparation method of PETG composites, and the method includes following stepSuddenly：
(1) weighed in terms of weight/mass percentage composition：
PETG resins 90%；
Carbon nano-fiber 5%；
Auxiliary agent 5%；
Specifically, the auxiliary agent can be plasticizer, lubricant, antioxidant and bulking agent.
(2) PETG resins after dehumidifying drying 5 hours, are added into carbon nano-fiber, auxiliary agent at 75 DEG C, is mixed in high mixerConjunction is uniform to obtain mixture；
(3) by mixture after plasticizing, cooling at 260 DEG C, diaphragm of the press mold into production appliance.
It is worth noting that, first embodiment of the invention can be used with the PETG composites in second embodimentIn dental appliance is prepared.
In addition, first embodiment of the invention can be obtained with each component in second embodiment by market purchaseTake.
Third embodiment of the present invention is related to one kind without bracket stealth dental appliance, and the appliance is implemented comprising firstPETG composites described in mode or second embodiment.
Further, screen resilience test is carried out to the dental appliance in present embodiment, test result is as shown in Figure 2.It is known that after adding carbon nano-fiber, the die-away time of the screen resilience of dental appliance extends to 3 weeks from Fig. 2.
It is noted that the preparation technology flow without bracket stealth dental appliance is as shown in Figure 3.
Specific step is as follows：
1st, the completion of photocuring model：The tooth model of patient is produced by way of photocuring；
2nd, hot setting：This step, temperature are completed using hot setting case：80 °, time：20 minutes.The purpose of the stepIt is to improve the hardness of tooth model.
3rd, the heating of appliance diaphragm and press mold：Appliance diaphragm is compressed on the tooth model after step 2 is processed.ToolBody ground, this 2 steps are completed using malleation film laminator, are heated 25~30 seconds, malleation 20~60 seconds.Wherein, heating and pressureTime can be according to the thickness accommodation of diaphragm.
4th, the cooling of appliance：Natural cooling at room temperature, it is not necessary to auxiliary machinery.
5th, the polishing grinding of appliance：The appliance edge, burr part in step 4 is polished round and smooth using sander.I.e.Complete the preparation of appliance.
Compared with prior art, the carbon nano-fiber in the PETG composites in above-mentioned implementation method in normal temperature andBe not in any contraction in the environment of humidity, can so weaken significantly dental appliance screen resilience decay speed, andIn two time-of-weeks rescued by the adjustable attenuation of screen resilience within limits so that the efficiency of rescuing of dental appliance is obtainedIt is obviously improved.
It will be understood by those skilled in the art that the respective embodiments described above are to realize specific embodiment of the invention,And in actual applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.