阅读说明：本技术 一种制备石英纤维的方法 (Method for preparing quartz fiber ) 是由 麦德坤 曾昭叶 陈艺少 于 2020-04-27 设计创作，主要内容包括：本发明通过将石英纤维、环氧A胶树脂和环氧B胶树脂混合搅拌成第一混合物,再将第一混合物倒入模具中,对该模具进行抽真空至少3分钟；将该模具加热至第一温度并加压负载至第一压力,保持该第一温度和该第一压力持续第一时间,固化结束待冷却后将成型的材料从模具中取出；使用石英纤维为基体,环氧树脂为增强体的复合材料可以在提高材料抗老化、抗磨损和抗冲击强度的同时降低复合材料的整体质量,保证该复合材料制备的手机中框或后盖具有较高的性能和较好的外观。(Mixing and stirring quartz fiber, epoxy A glue resin and epoxy B glue resin to form a first mixture, pouring the first mixture into a mold, and vacuumizing the mold for at least 3 minutes; heating the mould to a first temperature and pressurizing the mould to a first pressure, maintaining the first temperature and the first pressure for a first time, and taking the formed material out of the mould after solidification and cooling; the composite material with quartz fiber as the matrix and epoxy resin as the reinforcement can improve the aging resistance, abrasion resistance and impact strength of the material and simultaneously reduce the overall quality of the composite material, and ensures that the middle frame or the rear cover of the mobile phone prepared from the composite material has higher performance and better appearance.)

1. A method of making a quartz fiber, comprising:

respectively weighing 50-75% of quartz fiber, 20-40% of epoxy A glue resin and 5-10% of epoxy B glue resin in percentage by mass of the total material;

stirring and mixing the weighed quartz fiber, the epoxy A glue resin and the epoxy B glue resin to obtain a first mixture;

heating the mold to a first temperature for preheating;

pouring the first mixture into the mold, and vacuumizing the mold after closing the mold;

maintaining the mold at the first temperature while applying a pressure load to the mold to a first pressure, maintaining the first temperature and the first pressure for a first time to obtain a solidified material.

2. The method as claimed in claim 1, wherein the step of weighing 50-75% of quartz fiber, 20-40% of epoxy A glue resin and 5-10% of epoxy B glue resin respectively comprises: and multiplying the total mass of the material by the mass percentage of each component to obtain the mass number of each component.

3. The method of claim 1, wherein the step of stirring and mixing the weighed quartz fiber, the epoxy A glue resin and the epoxy B glue resin to obtain a first mixture comprises: and pouring the quartz fiber, the epoxy A glue resin and the epoxy B glue resin into a container, and stirring the quartz fiber, the epoxy A glue resin and the epoxy B glue resin.

4. The method of claim 1, wherein the pouring the first mixture into a mold, and evacuating the mold comprises: and putting the mold into a vacuum container, vacuumizing the vacuum container, and continuing vacuumizing for at least 3 minutes.

5. The method of claim 1, wherein the first temperature is at least 150 ℃.

6. The method of claim 1, wherein the first pressure is at least 40Mpa to 70 Mpa.

7. The method of claim 1, wherein the first time is at least 30 minutes.

8. The method as claimed in claim 1, wherein the step of weighing 50-75% of quartz fiber, 20-40% of epoxy A glue resin and 5-10% of epoxy B glue resin respectively comprises the step of weighing 42-72% of quartz fiber, 20-40% of epoxy A glue resin, 5-10% of epoxy B glue resin and 3-8% of metal powder respectively.

9. The method of claim 1, wherein the step of weighing 50-75% of quartz fiber, 20-40% of epoxy A glue resin and 5-10% of epoxy B glue resin respectively comprises: quartz fiber accounting for 42-72 percent of the total mass of the material, epoxy A glue resin accounting for 20-40 percent of the total mass of the material, epoxy B glue resin accounting for 5-10 percent of the total mass of the material and color paste accounting for 3-8 percent of the total mass of the material are respectively weighed.

10. The method of claim 6, wherein the pressurizing the mold to the first pressure comprises extruding a portion of the first mixture out of a discharge port of the mold.

Technical Field

The invention relates to the field of preparation of quartz fiber materials, in particular to a method for preparing quartz fibers.

Background

With the improvement of appearance and weight of the mobile phone, the improvement of the aging resistance, abrasion resistance, impact resistance and modulus of the middle frame and the rear cover of the mobile phone is required and the weight of the mobile phone is also required to be reduced, which puts higher requirements on the performance of the used materials of the middle frame and the rear cover of the mobile phone.

At present, the materials of the middle frame and the rear cover of the mobile phone which are mainly used are metal or plastic, the abrasion resistance and the impact strength of the metal and the plastic are not enough to ensure that the mobile phone is kept in good condition when falling, the ageing resistance of the plastic is poor, and the appearance of the mobile phone is greatly influenced when the plastic is aged after being used for a period of time.

Disclosure of Invention

In view of the above problems, the present invention proposes a method of manufacturing a quartz fiber to improve the above problems.

In a first aspect, the present invention provides a method of producing a silica fibre, the method comprising:

respectively weighing 50-75% of quartz fiber, 20-40% of epoxy A glue resin and 5-10% of epoxy B glue resin in percentage by mass of the total material;

stirring and mixing the weighed quartz fiber, the epoxy A glue resin and the epoxy B glue resin to obtain a first mixture;

heating the mold to a first temperature for preheating;

pouring the first mixture into the mold, closing the mold, and vacuumizing the mold;

maintaining the mold at the first temperature while applying a pressure load to the mold to a first pressure, maintaining the first temperature and the first pressure for a first time to obtain a cured material.

Preferably, the step of weighing 50-75% of quartz fiber, 20-40% of epoxy A glue resin and 5-10% of epoxy B glue resin respectively by weight percentage comprises the following steps: and multiplying the total mass of the material by the mass percentage of each component to obtain the mass number of each component.

Preferably, the step of stirring and mixing the weighed quartz fiber, the epoxy a glue resin and the epoxy B glue resin to obtain a first mixture comprises: pouring the quartz fiber, the epoxy A glue resin and the epoxy B glue resin into a container, and stirring the quartz fiber, the epoxy A glue resin and the epoxy B glue resin.

Preferably, the pouring the first mixture into a mold, and evacuating the mold after closing the mold comprises: the mold is placed in a vacuum vessel, and the vacuum vessel is evacuated for at least 3 minutes.

More preferably, the first temperature is at least 150 ℃.

More preferably, the first pressure is at least 40MPa to 70 MPa.

More preferably, the first time is at least 30 minutes.

More preferably, the step of respectively weighing 50-75% of quartz fiber, 20-40% of epoxy A glue resin and 5-10% of epoxy B glue resin in percentage by mass of the total material comprises the step of respectively weighing 42-72% of quartz fiber, 20-40% of epoxy A glue resin, 5-10% of epoxy B glue resin and 3-8% of metal powder in percentage by mass of the total material.

Preferably, the step of weighing 50-75% of quartz fiber, 20-40% of epoxy A glue resin and 5-10% of epoxy B glue resin respectively comprises the following steps: quartz fiber accounting for 42-72 percent of the total mass of the material, epoxy A glue resin accounting for 20-40 percent of the total mass of the material, epoxy B glue resin accounting for 5-10 percent of the total mass of the material and color paste accounting for 3-8 percent of the total mass of the material are respectively weighed.

More preferably, pressurizing the mold to the first pressure comprises extruding a portion of the first mixture out of a discharge port of the mold.

Mixing and stirring quartz fiber, epoxy A glue resin and epoxy B glue resin to form a first mixture, pouring the first mixture into a mold, and vacuumizing the mold; heating the mould to a first temperature and pressurizing the mould to a first pressure, maintaining the first temperature and the first pressure for a first time, and taking the formed material out of the mould after solidification and cooling; the composite material with quartz fiber as the matrix and epoxy resin as the reinforcement can improve the aging resistance, abrasion resistance and impact strength of the material and simultaneously reduce the quality of the composite material, and ensures that the middle frame or the rear cover of the mobile phone prepared from the composite material has higher performance and better appearance.

Drawings

FIG. 1 is a flow chart of a method of making a quartz fiber according to an embodiment of the present invention;

FIG. 2 is a flow chart of a method of making a silica fiber according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a flow chart of a method for preparing a quartz fiber according to an embodiment of the present invention, referring to fig. 1, the method comprising:

101. respectively weighing 50-75% of quartz fiber, 20-40% of epoxy A glue resin and 5-10% of epoxy B glue resin in percentage by mass of the total material.

102. And stirring and mixing the weighed quartz fiber, the epoxy A glue resin and the epoxy B glue resin to obtain a first mixture.

103. Heating the mold to a first temperature for preheating.

104. The first mixture was poured into a mold and the mold was evacuated.

105. Heating the mold to a first temperature while applying a pressure load to the mold to a first pressure, and maintaining the first temperature and the first pressure for a first time to obtain a cured material.

Preferably, the step of weighing 50-75% of quartz fiber, 20-40% of epoxy A glue resin and 5-10% of epoxy B glue resin respectively by weight percentage comprises the following steps: and multiplying the total mass of the material by the mass percentage of each component to obtain the mass number of each component.

Preferably, the step of stirring and mixing the weighed quartz fiber, the epoxy a glue resin and the epoxy B glue resin to obtain a first mixture comprises: pouring the quartz fiber, the epoxy A glue resin and the epoxy B glue resin into a container, and stirring the quartz fiber, the epoxy A glue resin and the epoxy B glue resin.

More preferably, the pouring of the first mixture into a mold, the evacuating of the mold comprising: the mold is placed in a vacuum vessel, and the vacuum vessel is evacuated for at least 3 minutes.

More preferably, the first temperature is at least 150 ℃.

More preferably, the first pressure is at least 40MPa to 70 MPa.

More preferably, the first time is at least 30 minutes.

More preferably, the step of respectively weighing 50-75% of quartz fiber, 20-40% of epoxy A glue resin and 5-10% of epoxy B glue resin in percentage by mass of the total material comprises the step of respectively weighing 42-72% of quartz fiber, 20-40% of epoxy A glue resin, 5-10% of epoxy B glue resin and 3-8% of metal powder in percentage by mass of the total material.

Preferably, the step of weighing 50-75% of quartz fiber, 20-40% of epoxy A glue resin and 5-10% of epoxy B glue resin respectively comprises the following steps: quartz fiber accounting for 42-72 percent of the total mass of the material, epoxy A glue resin accounting for 20-40 percent of the total mass of the material, epoxy B glue resin accounting for 5-10 percent of the total mass of the material and color paste accounting for 3-8 percent of the total mass of the material are respectively weighed.

Preferably, the pressurization of the mold to the first pressure comprises extrusion of a portion of the first mixture out of a discharge port of the mold.

FIG. 2 is a flow chart of a method of making a silica fiber according to an embodiment of the present invention. Referring to fig. 2, the method includes:

201. respectively weighing 50-75% of quartz fiber, 20-40% of epoxy A glue resin and 5-10% of epoxy B glue resin in percentage by mass of the total material.

Wherein, the components are weighed by a balance, when the quartz fiber content is 75%, the epoxy A glue resin content is 20%, and the epoxy B glue resin content is 5%; when the quartz fiber accounts for 50%, the epoxy A glue resin accounts for 40%, and the epoxy B glue resin accounts for 10%; and controlling the sum of the mass percentages of the quartz fiber, the epoxy A glue resin and the epoxy B glue resin to be 100%. The weight ratio of the epoxy A glue resin to the epoxy B glue resin is 4:1, and the weight of the epoxy A glue resin is 4 times that of the epoxy B glue resin. Simultaneously, the weighed materials of all components are dehydrated before being stirred and mixed, and the materials of all groups of wind are kept dry; for example, the component materials are dried using a drying oven.

More preferably, the step of respectively weighing 50-75% of quartz fiber, 20-40% of epoxy A glue resin and 5-10% of epoxy B glue resin in percentage by mass of the total material comprises the step of respectively weighing 42-72% of quartz fiber, 20-40% of epoxy A glue resin, 5-10% of epoxy B glue resin and 3-8% of metal powder in percentage by mass of the total material.

Specifically, when weighing component materials, more than one metal powder material is weighed; when the quartz fiber is weighed to be 60% in mass percentage, the epoxy A glue resin is weighed to be 28% in mass percentage, the epoxy B glue resin is weighed to be 7% in mass percentage, and the metal powder is weighed to be 5% in mass percentage; keeping the sum of the mass percentages of the components as 100 percent; this metal powder of weighing and this quartz fiber, this epoxy A glue resin and this epoxy B glue resin misce bene form first mixture, and in getting into first mixture through adding metal powder, can change the reflection line of first mixture, promote the outward appearance of product.

Preferably, the step of weighing 50-75% of quartz fiber, 20-40% of epoxy A glue resin and 5-10% of epoxy B glue resin respectively comprises the following steps: quartz fiber accounting for 42-72 percent of the total mass of the material, epoxy A glue resin accounting for 20-40 percent of the total mass of the material, epoxy B glue resin accounting for 5-10 percent of the total mass of the material and color paste accounting for 3-8 percent of the total mass of the material are respectively weighed.

Specifically, when weighing the component materials, more than one color paste material is weighed; when the quartz fiber is weighed to be 60% in mass percentage, the epoxy A glue resin is weighed to be 22% in mass percentage, the epoxy B glue resin is weighed to be 10% in mass percentage, and the color paste is weighed to be 8% in mass percentage; keeping the sum of the mass percentages of the components as 100 percent; the weighed color paste is uniformly mixed with the quartz fiber, the epoxy A glue resin and the epoxy B glue resin to form a first mixture, and the color paste is added into the first mixture, so that the color ratio of the first mixture can be changed, the appearance of the product is changed, and the appearance of the product is diversified.

202. And stirring and mixing the weighed quartz fiber, the epoxy A glue resin and the epoxy B glue resin to obtain a first mixture.

Pouring the weighed quartz fiber, the epoxy A glue resin and the epoxy B glue resin into a container; for example, the quartz fibers, the epoxy A glue resin and the epoxy B glue resin poured into the container are stirred by a stirrer with a rotation speed of 150 rpm-300 rpm for at least 6 minutes, and the quartz fibers, the epoxy A glue resin and the epoxy B glue resin are uniformly stirred in the container to form a first mixture.

203. Heating the mold to a first temperature for preheating.

Wherein the mold is heated and preheated to a first temperature; for example, the mold is placed in a vacuum machine with a heating function, the heating plate inside the vacuum container is set to 150 ℃, the mold is heated along with the vacuum machine, and the mold is preheated to a first temperature.

Preferably, before heating, the mould is subjected to oil soaking demoulding treatment, the mould release agent is uniformly coated on the surface of the mould, then the mould is heated to the first temperature and is kept at the first temperature for more than 2 hours, the mould release agent can be dried and solidified on the surface of the mould, and a layer of demoulding effect is formed on the surface of the mould.

204. The first mixture is poured into a mold, the mold is placed in a vacuum machine, and the vacuum container is evacuated for at least 3 minutes.

Wherein the first mixture is poured into the mould which has been preheated so that the first mixture can completely fill the mould; vacuumizing the mould, and extracting bubbles in the first mixture from the first mixture; for example, after pouring the first mixture into a mold, evacuating the vacuum container, controlling the vacuum pressure in the vacuum container to 40Kpa, and maintaining the vacuum pressure for at least 3 minutes; the bubbles in the first mixture can be extracted by pumping the vacuum container to vacuum negative pressure, so that the density of the first mixture is increased; the agitation of the first mixture tends to bubble the first mixture, and the elimination of the steam pocket from the first mixture prior to curing affects the material properties and appearance of the final product.

205. Maintaining the mold at the first temperature while applying a pressure load to the mold to a first pressure, maintaining the first temperature and the first pressure for a first time to obtain a cured material.

Wherein the temperature in the vacuum vessel is maintained at a first temperature while applying a pressure load to the mold to a first pressure, the mold being maintained at the first temperature and the first pressure for at least a first time. Since the first mixture contains the epoxy a glue resin and the epoxy B glue resin, in order to cure the epoxy a glue resin and the epoxy B glue resin, it is necessary to perform the cross-linking curing at a continuously high temperature.

More preferably, the first temperature is at least 150 ℃.

Specifically, the first temperature is set to at least 150 ℃, for example, the first temperature may be set to: 150 ℃, 160 ℃, 170 ℃, 180 ℃, 190 ℃ and 200 ℃; the epoxy A glue resin and the epoxy B glue resin can reach higher crosslinking degree only under the condition of high temperature when being subjected to crosslinking curing, and the crosslinking degree directly determines the curing degree of a cured material and finally determines the impact strength of the material after being molded.

More preferably, the first time is at least 30 minutes.

Specifically, the first time is set to at least 30 minutes, for example, the first temperature may be set to: 30 minutes, 40 minutes, 50 minutes, 60 minutes; the crosslinking and curing of the epoxy A glue resin and the epoxy B glue resin is a chemical reaction process, the chemical bond crosslinking between the epoxy A glue resin and the epoxy B glue resin requires reaction time, and the curing material with high crosslinking degree can be obtained by sufficient reaction time.

206. Pressurizing the mold to a first pressure comprises extruding a portion of the first mixture out of a discharge opening of the mold, the first pressure being at least 40Mpa to 70 Mpa.

The first mixture can be extruded and compacted by pressurizing and loading the die to a first pressure, so that the density of the cured material is improved, and the ageing resistance and the abrasion resistance of the cured material are further improved; for example, by pressing the die from its surface with a hydraulic press, the pressure at the die surface can be: 40Mpa, 50Mpa, 60Mpa, 70Mpa, 75Mpa, 80Mpa, apply the pressurization load on the surface of the mould to extrude the mould to the mould and totally merge; weights may also be used to apply a compressive load to the mold surface. When the mold is loaded under pressure, the excess epoxy A resin and epoxy B resin in the mold can be extruded and discharged from the discharge opening of the mold, and the steam pocket in the first mixture can be discharged from the discharge opening along with the epoxy resin, so that the density of the first mixture is further increased, and the performance of the cured material is improved.

207. Cooling the mold to below 30 deg.C, removing load, and taking out the solidified material.

Wherein, the solidified material can be taken out only by cooling and removing the load after being formed, and the solidified material is cooled by a cooling mould; for example, the heating function of the hydraulic press is closed, so that the die is naturally cooled to normal temperature on the hydraulic press; the mold may also be moved into a cooling plate to accelerate cooling.

In conclusion, the quartz fiber, the epoxy A glue resin, the epoxy B glue resin, the metal powder and the color paste are mixed to form the first mixture, and the first mixture is vacuumized, so that the quartz fiber and the epoxy A glue resin can be uniformly mixed, and the density of the first mixture is improved; heating and pressurizing the first mixture to enable epoxy A glue resin and epoxy B glue resin in the first mixture to generate a cross-linking curing reaction, so that the quartz fiber is cured, cooling the mold and removing the load, and then taking out the cured material; the quartz fiber with the substrate composed of the quartz fiber has excellent ageing resistance and abrasion resistance; after cross-linking and curing, the epoxy A glue resin and the epoxy B glue resin can cure the quartz fibers in the first mixture, so that the quartz fibers are not displaced, the impact strength of the quartz fibers is improved, and the impact strength of the cured material is further improved.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions.