CN110811875A - Diaphragm for making braces, braces and method for making braces - Google Patents

Abstract

The present invention relates to a diaphragm for manufacturing a dental brace, a dental brace and a method for manufacturing a dental brace. The diaphragm includes a piece body, and the sheet body includes at least two parts that are butt-connected, and the hardness of the at least two parts is different. . The diaphragm provided by the present invention has at least two hardnesses, and the hardness can be designed according to the required orthodontic strength, and the areas where different hardnesses are located can also be designed according to the actual conditions of the teeth, so that the design of the corresponding hardness for different orthodontic strengths is realized. The sheet body part, after the dental brace is made from the sheet body, the corresponding orthodontic strength can be provided for the corresponding tooth part, thereby improving the orthodontic effect and shortening the orthodontic period.

Description

Diaphragm for making braces, braces and method for making braces

technical field

The invention relates to the field of medical instruments, in particular to a diaphragm for making a dental brace, a dental brace and a method for making a dental brace.

Background technique

Orthodontics, that is, correcting tooth deformities, through the application of external force through the wearing of aligners to shift the teeth, so as to achieve the purpose of rearrangement. The traditional appliance is a metal brace, which is usually composed of a nickel-titanium alloy arch wire and a metal bracket. This appliance can achieve a good therapeutic effect, but it is not beautiful and comfortable, and the arch wire in the wearing process is not enough. And brackets will irritate the mouth, causing a foreign body sensation, and debris left on the arch wires and brackets, which is easy to breed bacteria.

In order to solve the problems of traditional metal braces, invisible braces (also known as invisible braces) came into being. Compared with traditional braces, invisible braces without brackets are safer and more comfortable. The oral tissue is scratched, it will not affect the aesthetics of the oral cavity after wearing, it can be worn by itself, and it is easy to clean. The material of invisible braces belongs to elastic materials. The treatment principle is that when wearing invisible braces, the invisible braces undergo a certain elastic deformation. During the recovery process of this elastic deformation, a force on the teeth is generated to push the teeth to move, so as to achieve the purpose of correction. Invisible braces are made of transparent plastic materials, and the current film used to make invisible braces is a single piece of hardness, so that each part of the invisible braces only has the same orthodontic strength, while the actual situation is the required orthodontic treatment for each part of the teeth. The strength is different, so that the orthodontic effect of the existing invisible braces is not obvious, or a long period of orthodontic treatment is required.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the defects of the prior art, and to provide a diaphragm for making dental braces, a dental brace and a method for making a dental brace, so as to solve the problem that the existing invisible braces only have one kind of hardness, so that the correction effect is not obvious or the correction cycle is Long question.

The technical solution to achieve the above purpose is:

The present invention provides a diaphragm for making dental braces, comprising a sheet body, the sheet body comprising at least two parts connected by butt joint, and the hardness of the at least two parts is different.

The diaphragm provided by the present invention has at least two hardnesses, and the hardness can be designed according to the required orthodontic strength, and the areas where different hardnesses are located can also be designed according to the actual conditions of the teeth, so that the design of the corresponding hardness for different orthodontic strengths is realized. The sheet body part, after the dental brace is made from the sheet body, the corresponding orthodontic strength can be provided for the corresponding tooth part, thereby improving the orthodontic effect and shortening the orthodontic period.

A further improvement of the membrane sheet for making dental braces of the present invention is that a part of the at least two parts is located inside the remaining part; or

Both of the at least two parts are partially located on the periphery of the sheet body.

A further improvement of the film used for making dental braces of the present invention lies in that the thicknesses of the at least two parts are the same.

A further improvement of the film used for making dental braces of the present invention is that the materials of the at least two parts are different or the same.

A further improvement of the membrane sheet used for making dental braces of the present invention is that the sheet body is a foamed profile with uniformly distributed cells inside, and the cells are non-sealed.

A further improvement of the membrane sheet for making dental braces of the present invention is that the sheet body includes at least two sheet layers, and the hardnesses between the at least two sheet layers are different.

The present invention also provides a dental brace, which is made of the above-mentioned diaphragm.

The present invention also provides a method for making dental braces using the above-mentioned diaphragm, comprising the following steps:

A diaphragm is prepared according to an orthodontic plan, the prepared diaphragm includes at least two parts connected by butt joint, and the hardness of the at least two parts is different;

A dental brace is formed by processing the obtained diaphragm, and the formed dental brace has at least two different hardnesses.

A further improvement of the method of the present invention is, also comprises:

When making the diaphragm, the physical gas foaming method is used to prepare and form the diaphragm, and the formed diaphragm is a foamed profile with uniformly distributed cells inside;

Using a needle to pierce the membrane to make the cells inside the membrane be non-closed;

After processing to form a dental brace, the non-closed cells can be used to adsorb and store active ingredients.

A further improvement of the method of the present invention is that the step of preparing the diaphragm according to the orthodontic plan includes:

S11. Divide the regions according to the orthodontic treatment plan to form at least two regions, and the required hardness of the at least two regions is different;

S12. Provide a mold, in which a first model space corresponding to one of the at least two regions is formed by partitioning the mold, and a first part with corresponding hardness is formed through the first model space;

S13. A second model space corresponding to the next region of the at least two regions is formed in the mold, and the second model space is connected to the edge corresponding to the first part, and the second model space is connected to the edge corresponding to the first part. Two model spaces are made into a second part with corresponding hardness, and the second part and the first part are butted into one body;

S14. Step S13 is repeated until each area in the at least two areas is made with corresponding parts, and then the required diaphragm is obtained.

Description of drawings

FIG. 1 is a schematic structural diagram of a first embodiment of a diaphragm for making a dental brace according to the present invention.

FIG. 2 is a schematic structural diagram of a second embodiment of a diaphragm used for making a dental brace according to the present invention.

FIG. 3 is a schematic structural diagram of a third embodiment of a diaphragm for making a dental brace according to the present invention.

FIG. 4 is a schematic structural diagram of a fourth embodiment of a diaphragm for making a dental brace according to the present invention.

FIG. 5 is a schematic structural diagram of a fifth embodiment of a diaphragm for making a dental brace according to the present invention.

FIG. 6 is a schematic structural diagram of a sixth embodiment of a diaphragm for making a dental brace according to the present invention.

FIG. 7 is a schematic structural diagram of a dental and jaw model placement area provided on the first embodiment of the diaphragm for making a dental brace according to the present invention.

FIG. 8 is a schematic structural diagram of a dental model placement area provided on the third embodiment of the diaphragm used for making the mouthpiece of the present invention.

Fig. 9 is a cross-sectional view of the membrane sheet used for making dental braces according to the present invention.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

Referring to FIG. 1, the present invention provides a diaphragm for making a dental brace, a dental brace and a method for making a dental brace, which are used to solve the problem that the existing dental braces only have a single hardness and are difficult to meet the requirements of different orthodontic strengths of different teeth, so that the There are problems that the orthodontic effect of braces is not obvious or the orthodontic period is very long. The diaphragm of the present invention includes at least two parts connected by butt, and the hardness of the at least two parts is different, so that different orthodontic strengths can be realized on one dental brace, and then the hardness can be matched with the actual needs, and the teeth can be targeted. It can improve the correction effect and shorten the correction period. The following describes the diaphragm, the dental brace and the method for manufacturing the dental brace of the present invention with reference to the accompanying drawings.

Referring to FIG. 1 , there is shown a schematic structural diagram of the first embodiment of the diaphragm for making a dental brace of the present invention. In the following, the film used for making a dental brace of the present invention will be described with reference to FIG. 1 .

As shown in FIG. 1 , the diaphragm for making a dental brace of the present invention includes a sheet body 20 , and the sheet body 20 includes at least two parts that are butt-connected, and the hardness of the at least two parts is different.

In the embodiment shown in FIG. 1 , the sheet body 20 includes a first portion 21 a and a second portion 21 b , and the first portion 21 a and the second portion 21 b are connected as a whole to form the sheet body 20 .

The sheet body 20 has at least two parts with different hardnesses, and the hardness of the corresponding parts can be adapted to the required orthodontic strength of the tooth part, so that the targeted orthodontic strength can be provided for each tooth, which can improve the performance of the teeth. Correction effect, shorten the correction period.

In a specific embodiment, at least two parts of the sheet body 20 are made of a thermoplastic material, and the properties of the thermoplastic material to be softened by heat and hardened by cooling are used to enable thermal fusion connection between each of the at least two parts As a whole, no seams, good integrity and high firmness. Each of the at least two parts is formed successively, and the pre-formed part is placed in the mold of the post-formed part, and the post-formed part melts the butt surface of the pre-formed part in a hot-melting state and then forms a whole.

Preferably, the material of the sheet body 20 can be selected from one or more of polyurethane, ethylene terephthalate-1,4-cyclohexanedimethanol and polycarbonate. Among them, polyurethane, ethylene terephthalate-1,4-cyclohexanedimethanol ester and polycarbonate can be adjusted to obtain the required hardness. The hardness here is characterized by Shore hardness, and the hardness ranges from Between 30D and 90D, the D type is used for materials with relatively high hardness.

Further, the materials of at least two parts in the sheet body 20 are different, that is, different hardnesses are achieved by different materials. Alternatively, the material of at least two parts of the sheet body 20 is the same, and the at least two parts are made of the same material with different hardnesses.

Preferably, the material of at least two parts of the sheet body 20 can be selected from one of polyurethane, polyethylene terephthalate-1,4-cyclohexanedimethanol and polycarbonate. The materials chosen for the at least two parts can be the same or different.

Still further, each part of the sheet body 20 can be formed by injection molding, extrusion molding or thermocompression molding.

In a specific embodiment, the thickness of at least two parts of the sheet body 20 is the same, that is, the thickness of the sheet body 20 is uniform, and the upper surface and the lower surface of the sheet body 20 are flat surfaces when viewed from the side. Using the same thickness of diaphragm to make braces, the thickness of each part of the formed braces is uniform, comfortable to wear, and there is no foreign body sensation in the mouth. If the thickness of the braces is thick, it will stimulate the tongue to secrete saliva, thereby reducing the comfort.

Further, the thickness of the sheet body 20 is between 0.1 mm and 3 mm. Generally, the thickness of the processed braces is about 1.00mm. When the thickness is greater than 1.00mm, there will be a foreign body sensation and poor comfort. Therefore, the thickness of the sheet body 20 is preferably between 0.1 mm and 2.00 mm, and the thickness of the sheet body 20 is preferably 0.4 mm, 0.67 mm, 0.76 mm, 1.00 mm, 1.5 mm or 2 mm.

In a specific embodiment, a part of the at least two parts of the sheet body 20 is located inside the remaining part. Thus, a sheet shape is formed that is partially enclosed by the rest.

As shown in FIG. 1, a first embodiment of the diaphragm is shown. In the first embodiment, a first portion 21a is provided on the outer periphery of a second portion 21b, the first portion 21a surrounds the second portion 21b, and the second The shape of the part 21b is similar to a horseshoe shape, and the peripheral edge of the second part 21b is an arc shape, and the arc shape is adapted to the shape of the dental jaw model. With reference to Fig. 7, the dental model setting area 10 is placed at the junction of the first part 21a and the second part 21b, so that the processed mouthpiece has different hardnesses on the side close to the lip and the side close to the tongue, which can be To push the teeth towards the lips or towards the tongue to achieve the corrective function. The diaphragm of the first embodiment can be injection-molded, firstly, the first part is injection-molded, and then the second part is formed by injection-molding in the first part.

As shown in FIG. 2 , a second embodiment of the diaphragm is shown. In the second embodiment, the outer periphery of the second portion 21b provided by the first portion 21a, the second portion 21b and the first portion 21a are both circular. If the jaw model is placed on the diaphragm of the second embodiment, the incisors and molars of the brace can have different hardnesses, and the canines and premolars are located in the first part 21a and the second part 21b correspondingly. The junction of the parts, and thus the side of the parts near the lip and the side of the tongue have different hardness.

In the first embodiment and the second embodiment, the shape of the second portion 21b is circular or similar to a horseshoe shape, but the shape of the second portion 21b is not limited to this. The shape adaptability of the second part 21b can be adjusted, which can be a regular geometric shape or an irregular geometric shape.

In a specific embodiment, at least two parts of the sheet body 20 are partially located at the periphery of the sheet body 20 . Therefore, a shape in which each part has an edge located at the edge of the sheet body is formed.

As shown in FIG. 3, a third embodiment of the diaphragm is shown, in which the first part 21a and the second part 21b are provided with arcuate abutting edges, wherein the first part 21a has a crescent shape, and The second portion 21b is in the shape of an oblate spherical shape with pointed ends. As shown in Fig. 8, the jaw model setting area 10 is placed at the junction of the first part 21a and the second part 21b, so that the incisors and the molars of the processed braces have different hardnesses, and the canines and premolars have different hardnesses. The corresponding ones are located at the junction of the first part 21a and the second part 21b, and thus the sides of the parts near the lip and the sides near the tongue have different hardnesses.

As shown in FIG. 4, a fourth embodiment of the diaphragm is shown. In the fourth embodiment, the first part 21a and the second part 21b are both semicircular, and the first part 21a and the second part 21b are butted to form a circular shape. Sheet body 20. The film sheet of the fourth embodiment can be formed by co-extrusion through extrusion process, that is, two extruders are arranged in parallel, and the two materials extruded from the extrusion port are butted together and cooled to form the desired sheet.

As shown in FIG. 5, a fifth embodiment of the diaphragm is shown. In the fifth embodiment, the first part 21a and the second part 21b are both fan-shaped, and the two fan-shaped angular arcs are different, and the sum of the two angular arcs is 360°, the first part 21a and the second part 21b are butted to form a circular sheet body 20 .

As shown in FIG. 6, a sixth embodiment of the diaphragm is shown. In the sixth embodiment, the sheet body 20 includes three parts, a first part 21a, a second part 21b and a third part 21c, the first part 21a, The second portion 21b and the third portion 21c bisect a circle.

It should be noted that the sheet body 20 of the film sheet in the present invention is transparent, and the filling shown in FIGS. 1 to 6 is to separate each area.

In a specific embodiment, the sheet body 20 is a foamed profile with uniformly distributed cells inside. Each part of the sheet body 20 has different hardness by controlling the foaming density. The cells on the surface of the sheet body 20 are made non-sealed by means of acupuncture, so that the cells on the surface have storage space, and the storage space can be used to adsorb and store active ingredients, so that the processed dental mouthpiece can have corresponding Active function.

Preferably, when using the sheet body 20 with non-sealed cells to process the mouthpiece, the non-sealed cells are arranged on the inner side of the mouthpiece, that is, on the side where the mouthpiece is in contact with the teeth when worn. In this way, the active ingredients stored in the non-closed cells can be gradually set aside and attached to the surface of the teeth, thereby realizing corresponding functions.

Further, the active ingredient may be a whitening ingredient, a disinfecting ingredient, a tooth stain removal ingredient, an anti-sensitivity ingredient, an anti-cavity ingredient or other ingredients with pharmacological effects. Furthermore, in the process of orthodontic treatment, the functions of whitening teeth, disinfecting, removing tooth stains, resisting tooth sensitivity, preventing tooth decay, or maintaining teeth can be realized.

Specifically, the active ingredients can be a mixed solution of 5% potassium nitrate and 1400 ppm sodium fluoride, a 1000 ppm sodium fluoride solution, a mixed solution of 8% strontium acetate and 1000 ppm sodium fluoride, hydrogen peroxide, urea peroxide, peroxide One or more of calcium, sodium pyrophosphate peroxide, baking soda, chlorine-based bleaching powder, and fluoride. The active ingredient can also be one or more of natural substances such as green salt, Chinese prickly ash, parsnip, angelica and asarum.

The sheet body of the present invention utilizes the design of non-sealed cells to make the mouthpiece have an adsorption function, and the foamed profile also has a certain elasticity, and its hardness can be controlled by controlling the foaming density. Adsorbs active potions with various functions, and when worn, the active potions are released from the pores to achieve corresponding active functions on the teeth. In specific use, the braces can be soaked in the potion dissolved with the corresponding active ingredients, and the potion will gradually penetrate into the non-sealed cells of the braces, and then the potion will be gradually released to the teeth during the wearing process. Simple and convenient to use.

Still further, the sheet body 20 is made by the physical gas foaming method, avoiding the use of chemical foaming agents, making the material safer and more environmentally friendly, and avoiding the threat to the health of the human body caused by the material of the braces. Preferably, the sheet body 20 can be prepared from a polyurethane raw material by a physical gas foaming method in the presence of a physical gas foaming agent, and its foaming density is 0.2 g/cm ³ to 0.6 g/cm ³ . The cells inside the foam profile are all airtight, and after the foam profile is made, the cells are made non-sealed by acupuncture, so that it can have the function of adsorption and storage.

In a specific embodiment, as shown in FIG. 9 , the sheet body 20 includes at least two sheet layers, and the hardnesses between the at least two sheet layers are different. In the example shown in FIG. 9, the sheet body 20 includes two sheet layers, a first sheet layer 22a and a second sheet layer 22b, the hardness of the first sheet layer 22a and the second sheet layer 22b are different, specifically, The first sheet layer 22a and the second sheet layer 22b can be designed with different thicknesses to have different hardnesses, and different materials can be selected to have different hardnesses, or the same material can be selected to have different hardnesses by adjusting the formula. In this embodiment, the sheet body 20 includes at least two parts that are butt-connected, and the overall thicknesses of the two parts are the same, but the thicknesses of the sheets in the two parts are different. The hardness of each part is different.

Further, the sheet layer located on the outer side of the at least two sheet layers adopts a foamed profile to make it have a certain flexibility, and the sheet layer located on the outer side can be arranged on the upper surface of the sheet body 20, or can be arranged on the sheet body 20. the lower surface. In this way, after processing into a brace, the flexible sheet can be located on the inner side of the brace, that is, the side that is in contact with the teeth when worn, or can be located on the outside of the brace, that is, the side that is not in contact with the teeth when worn. The soft sheet improves the wearing comfort, and the flexible sheet can provide a certain buffering effect for the braces, which can prevent the teeth from grinding, that is, it can protect the teeth when the wearer grinds the teeth and reduce the sound of grinding. When the lamellae are located on the outside of the braces, it is possible to avoid the sound of grinding teeth.

Preferably, the membrane sheet for making a dental brace of the present invention can be shaped into a circle, a square, or other regular geometric shapes, and can also be shaped into an irregular shape.

In a specific embodiment, the first part 21a and the second part 21b of the sheet body 20 have different thicknesses, and different hardnesses, ie different mechanical properties, are achieved through the different thicknesses. Preferably, the first part 21a and the second part 21b with different thicknesses can be combined by a single-layer sheet by hot pressing. During the combined design, the total thickness of the first part 21a and the second part 21b is different. Also preferably, the first part 21a and the second part 21b can be made of the same material, or different materials, such as polyurethane, polyester, and polycarbonate. The use of diaphragms with different thicknesses can solve the problem that some applications such as invisible braces require diaphragms of various thicknesses, and the cost is too high due to excessive production specifications. The standard combination of layers can be used for hot pressing to obtain the required thickness. diaphragm, and the integrity of the diaphragm is good. The combination of different materials can also obtain composite membranes with different properties to obtain corresponding mechanical properties. For example, TPU can be combined with PETG or two layers of TPU can be used to sandwich a layer of PETG.

Theoretically, the diaphragm of the present invention can be designed with multiple hardness parts to correspond to each tooth, but from the actual case of orthodontic treatment, the difference in the orthodontic strength of the braces will basically be at the front and rear of the braces or in the braces. The side close to the lip and the side close to the tongue, so it is more commonly used to design a film with two hardnesses. The following takes the preparation of a film with two hardnesses as an example for the preparation process of the film of the present invention. illustrate.

First, the area is divided into two areas according to the orthodontic plan, and the hardness of the two areas is designed according to the required orthodontic strength. Provide a mold, divide the mold space in the mold to form a mold space that matches the first area, then mold the first part through an injection molding process in the first mold space, and then remove the divider so that the remaining space in the mold matches the shape of the second area , the second part is formed into the remaining space by the injection molding process, and the second part and the first part are butted into a whole, so that the diaphragm is formed in the mold. The temperature during preparation will be between 180°C and 240°C, the raw material of the second part melts the edges of the first part when it comes into contact with the first part being formed, and then the first part and the second part form a overall.

The present invention also provides a dental brace, which is made of the above-mentioned diaphragm. The braces are transparent braces used for tooth correction. Since the above-mentioned diaphragms have different hardnesses, the formed braces also have different hardnesses, and the hardness can match the required orthodontic strength of the teeth.

The present invention also provides a method for manufacturing a dental brace using the above-mentioned diaphragm, and the method for manufacturing a dental brace is described below.

The method for making dental braces by utilizing the diaphragm of the present invention comprises the following steps:

A diaphragm is prepared according to an orthodontic plan, the prepared diaphragm includes at least two parts connected by butt joint, and the hardness of the at least two parts is different;

A dental brace is formed by processing the obtained diaphragm, and the formed dental brace has at least two different hardnesses.

Specifically, the diaphragm and the dental jaw model are positioned in the mold, and then the mold is heated to melt the diaphragm, and then the diaphragm is wrapped on the dental jaw model. The jaw model matches the braces too. Preferably, when the dental mouthpiece is made, the mold is evacuated, so that the melted membrane can be tightly wrapped on the dental model.

In a specific embodiment, it also includes:

When making the diaphragm, the physical gas foaming method is used to prepare and form the diaphragm, and the formed diaphragm is a foamed profile with uniformly distributed cells inside;

Using a needle to pierce the membrane to make the cells inside the membrane non-closed;

After processing to form a dental brace, the non-closed cells can be used to adsorb and store active ingredients.

The non-closed cells can store a certain amount of medicinal liquid containing active ingredients, which can increase the function of the braces, and make it have the functions of whitening, disinfection, cleaning and health care.

In a specific embodiment, the steps of preparing the diaphragm according to the orthodontic treatment plan include:

S11. Divide the regions according to the orthodontic plan to form at least two regions, and the required hardness of the at least two regions is different; specifically, the hardness of each region is designed according to the required orthodontic strength.

S12. Provide a mold, separate a first model space in the mold to form one of the corresponding at least two regions, and use the first model space to make a first part with corresponding hardness; specifically, it can be designed to match the shape of the edge of the region. Matching partitions, the partitions are fixed in the mold to achieve separation.

S13. Separate the second model space in the mold to form the next region in the corresponding at least two regions, and the second model space is connected with the corresponding edge of the first part, and the second model space is used to make the second model space with corresponding hardness. Two parts, and the second part and the first part are butted into one body;

S14. Step S13 is repeated until each area in the at least two areas is made with corresponding parts, and then the required diaphragm is obtained.

Several specific examples of making membranes are given below.

Example 1

Main extruder (A), 55mm single-screw diaphragm extruder, selected Lubrizol Isoplast 2530 polyurethane, Rockwell Hardness R Scale 121. Auxiliary extruder (B), a 55mm single-screw diaphragm extruder, uses LubrizolPellethane 2363 polyurethane, hardness 55D, and uses a co-extrusion method to make two-component diaphragms. The specific parameters are shown in Table 1:

Table 1 is the preparation parameter configuration of Example 1.

Example 2

Main extruder (A), 55mm single-screw diaphragm extruder, selected Lubrizol Isoplast 2530 polyurethane, Rockwell Hardness R Scale 121; auxiliary extruder (B), 55mm single-screw diaphragm extrusion Machine, use Lubrizol Pellethane 2363 polyurethane, Shore hardness: 65D, use co-extrusion method to make two-component film. The specific parameters are shown in Table 2:

Table 2 is the preparation parameter configuration of Example 2.

Example 3

Main extruder (A), 55mm single-screw diaphragm extruder, selected Lubrizol Isoplast 2530 polyurethane, Rockwell Hardness R Scale 121; auxiliary extruder (B), 55mm single-screw diaphragm extrusion Machine, use Lubrizol Pellethane 2363 polyurethane, Shore hardness: 75D, use co-extrusion method to make two-component film. The specific parameters are shown in Table 3:

Table 3 is the preparation parameter configuration of Example 3.

Example 4

Main extruder (A), 55mm single-screw diaphragm extruder, selected Lubrizol Isoplast 2530 polyurethane, Rockwell Hardness R Scale 121. Auxiliary extruder (B), 55mm single-screw diaphragm extruder, uses LubrizolPellethane 2363 polyurethane, hardness: 53D, and uses co-extrusion method to make two-component diaphragms. The specific parameters are shown in Table 4:

Table 4 is the preparation parameter configuration of Example 4.

Example 5

Main extruder (A), 55mm single-screw diaphragm extruder, selected Lubrizol Isoplast 2530 polyurethane, Rockwell Hardness R Scale 121. Auxiliary extruder (B), a 55mm single-screw membrane extruder, is made of Lubrizol Pellethane 2363 polyurethane, hardness: 62D, and a two-component membrane is produced by a co-extrusion method. The specific parameters are shown in Table 5:

Table 5 is the preparation parameter configuration of Example 5.

Example 6

Main extruder (A), 55mm single-screw diaphragm extruder, selected Lubrizol Isoplast 2530 polyurethane, Rockwell Hardness R Scale 121. Secondary extruder (B), 55mm single-screw diaphragm extruder, selects CHIMEI PC-115P, hardness: Ball Indentation Hardness 110, uses co-extrusion method to make two-component diaphragms. The specific parameters are shown in Table 6:

Table 6 is the preparation parameter configuration of Example 6.

Example 7

Main extruder (A), 55mm single-screw diaphragm extruder, selected Lubrizol Isoplast 2530 polyurethane, Rockwell Hardness R Scale 121. Auxiliary extruder (B), 55mm single-screw diaphragm extruder, Eastar Copolyester 6763, Rockwell Hardness R Scale 106, and co-extrusion method is used to make two-component diaphragms. The specific parameters are shown in Table 7:

Table 7 is the preparation parameter configuration of Example 7.

Example 8

Injection molding machine, Edex ATOR rotary table double shot injection molding machine, using Lubrizol Isoplast 2530 polyurethane, Rockwell Hardness R Scale 121; Lubrizol Tecothane TT-1055D polyurethane, Shore hardness: Shore 54D, using a cold gate two-color mold for double composition Diaphragm injection molding. The specific parameters are shown in Table 8:

Table 8 is the preparation parameter configuration of Example 8.

The present invention has been described in detail above with reference to the embodiments of the accompanying drawings, and those skilled in the art can make various modifications to the present invention according to the above description. Therefore, some details in the embodiments should not be construed to limit the present invention, and the present invention will take the scope defined by the appended claims as the protection scope of the present invention.

Claims (10)

What is claimed is: 1. A diaphragm for making dental braces, characterized in that it comprises a sheet body, the sheet body comprises at least two parts that are butt-connected, and the hardness of the at least two parts is different. 2. The membrane of claim 1, wherein a part of the at least two parts is located inside the remaining part; or Both of the at least two parts are partially located on the periphery of the sheet body. 3. The membrane for making dental braces according to claim 1, wherein the thicknesses of the at least two parts are the same. 4. The membrane for making dental braces according to claim 1, wherein the materials of the at least two parts are different or the same. 5 . The membrane sheet for making dental braces according to claim 1 , wherein the sheet body is a foamed profile with uniformly distributed cells inside, and the cells are non-hermetic. 6 . 6 . The membrane sheet for making dental braces according to claim 1 , wherein the sheet body comprises at least two sheet layers, and the hardnesses between the at least two sheet layers are different. 7 . 7 . A dental mouthpiece, characterized in that the dental mouthpiece is made of the diaphragm according to any one of claims 1 to 6 . 8. A method for making dental braces using the diaphragm according to any one of claims 1 to 6, characterized in that, comprising the steps of: A diaphragm is prepared according to an orthodontic plan, the prepared diaphragm includes at least two parts connected by butt joint, and the hardness of the at least two parts is different; A dental brace is formed by processing the obtained diaphragm, and the formed dental brace has at least two different hardnesses. 9. The method of claim 8, further comprising: When making the diaphragm, the physical gas foaming method is used to prepare and form the diaphragm, and the formed diaphragm is a foamed profile with uniformly distributed cells inside; Using a needle to pierce the membrane to make the cells inside the membrane be non-closed; After processing to form a dental brace, the non-closed cells can be used to adsorb and store active ingredients. 10. The method of claim 8, wherein the step of preparing the diaphragm according to the orthodontic treatment plan comprises: S11. Divide the regions according to the orthodontic treatment plan to form at least two regions, and the required hardness of the at least two regions is different; S12. Provide a mold, in which a first model space corresponding to one of the at least two regions is formed by partitioning the mold, and a first part with corresponding hardness is formed through the first model space; S13. A second model space corresponding to the next region of the at least two regions is formed by partitioning in the mold, and the second model space is in contact with the edge corresponding to the first part, and the second model space is connected to the edge corresponding to the first part. Two model spaces are made into a second part with corresponding hardness, and the second part and the first part are butted into one body; S14. Step S13 is repeated until each area in the at least two areas is made with corresponding parts, and then the required diaphragm is obtained.

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