阅读说明：本技术 聚脲树脂壳体及其制作方法 (Polyurea resin shell and manufacturing method thereof ) 是由 邓湘凌 于 2020-12-24 设计创作，主要内容包括：本发明提供一种聚脲树脂壳体及其制作方法。本发明的聚脲树脂壳体,其材料包括陶瓷粉、异氰酸酯、及氨基醚聚合物,可以作为产品的保护外壳,尤其可以用作手机后壳,具有足够的强度和硬度,能够对手机进行保护,避免损坏内部元器件,延长手机使用寿命,并且价格低廉、使用手感好。本发明的聚脲树脂壳体的制作方法,采用陶瓷粉、异氰酸酯、及氨基醚聚合物为原材料制成壳体材料,再将壳体材料进行固化,并打磨、抛光后制得聚脲树脂壳体,经打磨、抛光后,可以使得聚脲树脂壳体表面光滑,使用手感好,并且不会划伤产品。本发明的制作工艺简单、成本低；制作过程中得到的壳体材料一致性好,从而制得的聚脲树脂壳体结构致密,性能优异。(The invention provides a polyurea resin shell and a manufacturing method thereof. The polyurea resin shell provided by the invention comprises ceramic powder, isocyanate and amino ether polymer, can be used as a protective shell of a product, especially can be used as a mobile phone rear shell, has sufficient strength and hardness, can protect a mobile phone, avoids damaging internal components, prolongs the service life of the mobile phone, and has the advantages of low price and good use hand feeling. According to the manufacturing method of the polyurea resin shell, the shell material is made of the ceramic powder, the isocyanate and the amino ether polymer, the shell material is cured, and is polished and polished to obtain the polyurea resin shell. The invention has simple manufacturing process and low cost; the shell material obtained in the manufacturing process has good consistency, so that the prepared polyurea resin shell has compact structure and excellent performance.)

1. The polyurea resin shell is characterized in that the material of the polyurea resin shell comprises ceramic powder, isocyanate and aminoether polymer.

2. The polyurea resin housing according to claim 1, wherein the ceramic powder has a particle size of 100 nm or less; the Engler viscosity of the isocyanate at normal temperature is 200-300, and the Rockwell hardness is more than 80; the amino ether polymer adopts bis (2-dimethylaminoethyl) ether.

3. The polyurea resin case according to claim 1, wherein the polyurea resin case comprises 10 to 20 parts by weight of the ceramic powder, 40 to 45 parts by weight of the isocyanate, and 40 to 45 parts by weight of the aminoether polymer.

4. A manufacturing method of a polyurea resin shell is characterized by comprising the following steps:

step 1, providing ceramic powder and an amino ether polymer, mixing the ceramic powder and the amino ether polymer, uniformly stirring, and then defoaming in vacuum to obtain a mixture;

step 2, adding isocyanate into the mixture, stirring uniformly, and performing vacuum defoaming to obtain a shell material;

step 3, providing a shell mold, and spraying a dry release agent on the inner surface of the shell mold;

step 4, injecting the shell material into a shell mold;

step 5, solidifying the shell material to form a shell blank;

step 6, taking the shell blank out of the shell mold;

and 7, grinding and polishing the shell blank to obtain the polyurea resin shell.

5. The method of manufacturing a polyurea resin case according to claim 4, wherein in the step 1, the ceramic powder and the aminoether polymer are mixed and stirred by a high-speed centrifugal stirrer, and the stirring time is 15 to 30 minutes.

6. The method for manufacturing a polyurea resin case according to claim 4, wherein in the step 1, 10 to 20 parts by weight of the ceramic powder and 40 to 45 parts by weight of the aminoether polymer are added; in the step 2, the isocyanate is 40 to 45 parts by weight.

7. The method of manufacturing a polyurea resin case according to claim 4, wherein the particle diameter of the ceramic powder is 100 nm or less; the Engler viscosity of the isocyanate at normal temperature is 200-300, and the Rockwell hardness is more than 80; the amino ether polymer adopts bis (2-dimethylaminoethyl) ether.

8. The method of manufacturing a polyurea resin case according to claim 4, wherein in the step 2, the mixture and the isocyanate are mixed and stirred by a high-speed centrifugal stirrer, and the stirring time is 15 to 30 minutes.

9. The method of manufacturing a polyurea resin case according to claim 4, wherein the case mold is designed correspondingly according to a case of a predetermined product.

10. The method for manufacturing a polyurea resin case according to claim 4, wherein the step 5 specifically comprises: and maintaining the shell mold at the temperature of 40-60 ℃ for 2-4 hours, so that the shell material in the shell mold is solidified to form a shell blank.

Technical Field

The invention relates to a product shell, in particular to a polyurea resin shell and a manufacturing method thereof.

Background

With the improvement of the performance of mobile electronic products such as smart phones and tablets and the rapid development of mobile internet, terminal devices such as mobile phones and tablets become an integral part of the lives of many people. In addition to basic social communication, we can book tickets, shop, browse news, play games, etc. using cell phones and tablets.

Electronic products such as mobile phones and flat panels mainly comprise internal electronic components, liquid crystal display screens, batteries and shells, and the internal electronic components are fragile and are easily damaged once falling, so that the shells need to be supported and protected. The casing of the mobile phone is the most direct way to protect the body, and is also an important factor influencing the heat dissipation effect, weight and aesthetic degree of the mobile phone. Therefore, the mobile phone shell needs to have the characteristics of high strength, high hardness, good heat resistance and wear resistance, stable size, good appearance and the like, and simultaneously meets the cost requirement. However, most of the mobile phone shells in the current market are made of engineering plastics, metals, glass and other materials, and due to the low surface hardness and strength of the mobile phone shells and the fragile electronic components inside the mobile phone, the problems of screen breaking, power failure and the like easily occur after the mobile phone falls down, inconvenience is brought to users, and the service life of the mobile phone is seriously influenced.

Disclosure of Invention

The invention aims to provide a polyurea resin shell, which is made of ceramic powder, isocyanate and amino ether polymer, has enough strength and hardness, can protect products, and has low price and good use hand feeling.

The invention also aims to provide a manufacturing method of the polyurea resin shell, and the prepared polyurea resin shell has enough strength and hardness, can protect products, and has low price and good use hand feeling.

In order to achieve the above object, the present invention provides a polyurea resin case made of a material including a ceramic powder, an isocyanate, and an aminoether polymer.

The grain diameter of the ceramic powder is equal to or less than 100 nanometers; the Engler viscosity of the isocyanate at normal temperature is 200-300, and the Rockwell hardness is more than 80; the amino ether polymer adopts bis (2-dimethylaminoethyl) ether.

In the polyurea resin shell, 10-20 parts by weight of ceramic powder, 40-45 parts by weight of isocyanate and 40-45 parts by weight of amino ether polymer are used.

The invention also provides a manufacturing method of the polyurea resin shell, which comprises the following steps:

step 1, providing ceramic powder and an amino ether polymer, mixing the ceramic powder and the amino ether polymer, uniformly stirring, and then defoaming in vacuum to obtain a mixture;

step 2, adding isocyanate into the mixture, stirring uniformly, and performing vacuum defoaming to obtain a shell material;

step 3, providing a shell mold, and spraying a dry release agent on the inner surface of the shell mold;

step 4, injecting the shell material into a shell mold;

step 5, solidifying the shell material to form a shell blank;

step 6, taking the shell blank out of the shell mold;

and 7, grinding and polishing the shell blank to obtain the polyurea resin shell.

And in the step 1, ceramic powder and the amino ether polymer are mixed and stirred by a high-speed centrifugal stirrer, wherein the stirring time is 15-30 minutes.

In the step 1, 10-20 parts by weight of ceramic powder and 40-45 parts by weight of aminoether polymer are added; in the step 2, the isocyanate is 40 to 45 parts by weight.

The grain diameter of the ceramic powder is equal to or less than 100 nanometers; the Engler viscosity of the isocyanate at normal temperature is 200-300, and the Rockwell hardness is more than 80; the amino ether polymer adopts bis (2-dimethylaminoethyl) ether.

And 2, mixing and stirring the mixture and isocyanate by using a high-speed centrifugal stirrer, wherein the stirring time is 15-30 minutes.

The shell mold is designed correspondingly according to the shell of the predetermined product.

The step 5 specifically includes: and maintaining the shell mold at the temperature of 40-60 ℃ for 2-4 hours, so that the shell material in the shell mold is solidified to form a shell blank.

The invention has the beneficial effects that: the invention provides a polyurea resin shell, which is made of ceramic powder, isocyanate and amino ether polymer, can be used as a protective shell of a product, particularly can be used as a rear shell of a mobile phone, has enough strength and hardness, can protect the mobile phone, avoids damaging internal components, prolongs the service life of the mobile phone, and has low cost and good use hand feeling. The invention also provides a manufacturing method of the polyurea resin shell, which is characterized in that ceramic powder, isocyanate and amino ether polymer are adopted as raw materials to prepare a shell material, the shell material is cured, and is polished and polished to prepare the polyurea resin shell, and after polishing and polishing, the polyurea resin shell can be smooth in surface and good in using hand feeling, and the product can not be scratched. The invention has simple manufacturing process and low cost; in the manufacturing process, the ceramic powder and the aminoether polymer are mixed to obtain a mixture, isocyanate is added into the mixture, and the shell material obtained by mixing twice is good in consistency, so that the prepared polyurea resin shell is compact in structure and excellent in performance.

Drawings

For a better understanding of the nature and technical aspects of the present invention, reference should be made to the following detailed description of the invention, taken in conjunction with the accompanying drawings, which are provided for purposes of illustration and description and are not intended to limit the invention.

In the drawings, there is shown in the drawings,

fig. 1 is a schematic flow chart of a method for manufacturing a polyurea resin case according to the present invention.

Detailed Description

To further illustrate the technical means and effects of the present invention, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

The invention provides a polyurea resin shell, which can be particularly used as a mobile phone rear shell.

Specifically, the particle size of the ceramic powder is equal to or less than 100 nanometers. The isocyanate has an Engler viscosity of 200-300 at normal temperature and a Rockwell Hardness (HRB) of more than 80. The amino ether polymer adopts bis (2-dimethylaminoethyl) ether.

Specifically, in the polyurea resin shell, 10-20 parts by weight of ceramic powder, 40-45 parts by weight of isocyanate and 40-45 parts by weight of amino ether polymer are used.

Referring to fig. 1, based on the polyurea resin housing, the present invention further provides a manufacturing method of the polyurea resin housing, including the following steps:

step 1, providing ceramic powder and an amino ether polymer, mixing the ceramic powder and the amino ether polymer, uniformly stirring, and then defoaming in vacuum to obtain a mixture;

specifically, in the step 1, the ceramic powder and the amino ether polymer are mixed and uniformly stirred by a high-speed centrifugal stirrer, and the stirring can be performed for 15-30 minutes.

Specifically, in the step 1, 10-20 parts by weight of ceramic powder and 40-45 parts by weight of amino ether polymer are used.

Specifically, the particle size of the ceramic powder is equal to or less than 100 nanometers, and the amino ether polymer adopts bis (2-dimethylaminoethyl) ether.

Step 2, adding isocyanate into the mixture, stirring uniformly, and performing vacuum defoaming to obtain a shell material;

specifically, in the step 2, the mixture and the isocyanate are mixed and uniformly stirred by a high-speed centrifugal stirrer, and the mixture can be uniformly stirred within 15-30 minutes.

Specifically, the Engler viscosity of the isocyanate at normal temperature is 200-300, and the Rockwell Hardness (HRB) is more than 80.

Specifically, in the step 2, the isocyanate is 40 to 45 parts by weight.

Step 3, providing a shell mold, and spraying a dry release agent on the inner surface of the shell mold;

specifically, the shell mold is designed correspondingly according to the shell of a predetermined product, and is preferably a mold for manufacturing a mobile phone rear shell.

Step 4, injecting the shell material into a shell mold;

step 5, solidifying the shell material to form a shell blank;

specifically, the step 5 specifically includes: maintaining the shell mold at the temperature of 40-60 ℃ for 2-4 hours to solidify the shell material in the shell mold to form a shell blank;

step 6, taking the shell blank out of the shell mold;

and 7, grinding and polishing the shell blank to obtain the polyurea resin shell.

Specifically, after the polishing in the step 7, the surface of the polyurea resin shell can be smooth, the use hand feeling is good, and the product cannot be scratched.

In summary, the polyurea resin shell provided by the invention comprises the ceramic powder, the isocyanate and the amino ether polymer, can be used as a protective shell of a product, especially can be used as a mobile phone rear shell, has sufficient strength and hardness, can protect a mobile phone, avoids damaging internal components, prolongs the service life of the mobile phone, and has low cost and good use hand feeling. According to the manufacturing method of the polyurea resin shell, the shell material is made of the ceramic powder, the isocyanate and the amino ether polymer, the shell material is cured, and is polished and polished to obtain the polyurea resin shell. The invention has simple manufacturing process and low cost; in the manufacturing process, the ceramic powder and the aminoether polymer are mixed to obtain a mixture, isocyanate is added into the mixture, and the shell material obtained by mixing twice is good in consistency, so that the prepared polyurea resin shell is compact in structure and excellent in performance.

As described above, it will be apparent to those skilled in the art that various other changes and modifications can be made based on the technical solution and the technical idea of the present invention, and all such changes and modifications should fall within the protective scope of the appended claims.