阅读说明：本技术 一种云母复合材料及其制造方法 (Mica composite material and manufacturing method thereof ) 是由 潘渡江 黎钊 卢智虎 于 2021-09-06 设计创作，主要内容包括：本发明属于云母加工技术领域,具体提供了一种云母复合材料的制造方法,该方法工艺技术简单,产品整体成本较金属件大幅度降低,产品重量轻,可以根据产品尺寸需要,裁切成各种规格的大小,用于电动汽车电池包的安全防护件时,可减小电池包的整体体积,增大电池包的空间利用率；本发明以耐高温和绝缘性能较强的云母为基材,再增加补强材料玻璃纤维布、胶黏剂、溶剂,制作出的云母复合材料性能优秀,密度在2g/cm～(3)左右,阻燃性能可达到UL 94 V-0,能耐高温,1200℃火焰灼烧无破裂,电气强度大于20KV/mm,常温下抗弯强度大于180MPa。(The invention belongs to the technical field of mica processing, and particularly provides a manufacturing method of a mica composite material, which has the advantages of simple process technology, greatly reduced overall cost of products compared with metal parts, light weight of products, capability of being cut into sizes of various specifications according to the size requirements of the products, capability of reducing the overall volume of a battery pack and increasing the space utilization rate of the battery pack when being used for a safety protection part of the battery pack of an electric automobile; the mica composite material prepared by using mica with high temperature resistance and strong insulating property as a base material and adding the reinforcing material of glass fiber cloth, adhesive and solvent has excellent performance and the density of 2g/cm 3 About, the flame retardance can reach UL94V-0, and the flame retardant can resist high temperature and has no damage to flame burning at 1200 DEG CCracking, the electrical strength is more than 20KV/mm, and the bending strength at normal temperature is more than 180 MPa.)

1. A method for manufacturing a mica composite material is characterized by comprising the following steps:

(1) preparing an epoxy resin solution: melting solid epoxy resin, mixing the melted solid epoxy resin with an organic solvent, and fully stirring until the epoxy resin is completely dissolved in the organic solvent, wherein the organic solvent is a volatile organic solvent capable of dissolving the epoxy resin;

(2) gluing: soaking glass fiber cloth into the epoxy resin solution prepared in the step (1), and taking out the glass fiber cloth for later use after the epoxy resin soaks the glass fiber cloth;

(3) and (3) laminating: pressing the mica paper on the surface of the glass fiber cloth soaked with the epoxy resin solution to bond the mica paper and the glass fiber cloth into a whole;

(4) drying: and drying the pressed mica paper and the glass fiber cloth to volatilize the organic solvent in the epoxy resin solution, thereby obtaining the dry mica composite material.

2. The method of manufacturing a mica composite material according to claim 1, characterized in that: the organic solvent in the step (1) comprises at least one of ketone, ester, ether alcohol or chlorinated hydrocarbon organic solvents.

3. The method of manufacturing a mica composite material according to claim 1, characterized in that: the organic solvent in the step (1) is acetone or butanone.

4. The method of manufacturing a mica composite material according to claim 1, characterized in that: the mass ratio of the epoxy resin melted in the step (1) to the organic solvent is 1: (0.2-20).

5. The method of manufacturing a mica composite material according to claim 1, characterized in that: and (3) gluing by adopting a gluing machine in the step (2).

6. The method of manufacturing a mica composite material according to claim 1, characterized in that: and (4) drying by using an oven.

7. The method of manufacturing a mica composite material according to claim 1, characterized in that: the drying temperature in the step (4) is 35-100 ℃.

8. The method of making a mica composite of claim 1, further comprising step (5): a polyethylene film layer is laminated on one surface of the mica composite material mica paper.

9. A mica composite material produced by the production method as set forth in any one of claims 1 to 8.

Technical Field

The invention belongs to the technical field of mica processing, and particularly relates to a mica composite material and a manufacturing method thereof.

Background

At present, a core component of a new energy electric automobile in domestic development is a battery pack, a large amount of heat can be emitted in the working process of the battery pack, high temperature can be generated under extreme conditions, potential safety hazards are caused to vehicles and people, therefore, the battery pack is usually made of a material which is high-temperature-resistant, fireproof and good in mechanical strength, the material is usually made of a metal piece, but the metal piece is heavy, large in occupied space and high in cost, and in view of the defects, a better material needs to be developed to replace the metal piece, so that the cost of the battery pack is reduced, and the comprehensive performance is improved.

The invention provides a method for manufacturing a mica composite material, which takes mica with high temperature resistance and strong insulating property as a base material, and then adds reinforcing material glass fiber cloth, adhesive and solvent to manufacture a novel fireproof insulating mica composite material.

Disclosure of Invention

The invention aims to solve the problems of high cost, heavy weight and the like of the battery pack in the prior art.

Therefore, the invention provides a method for manufacturing a mica composite material, which is characterized by comprising the following steps:

(1) preparing an epoxy resin solution: melting solid epoxy resin, mixing the melted solid epoxy resin with an organic solvent, and fully stirring until the epoxy resin is completely dissolved in the organic solvent, wherein the organic solvent is a volatile organic solvent capable of dissolving the epoxy resin;

(2) gluing: soaking glass fiber cloth into the epoxy resin solution prepared in the step (1), and taking out the glass fiber cloth for later use after the epoxy resin soaks the glass fiber cloth;

(3) and (3) laminating: pressing the mica paper on the surface of the glass fiber cloth soaked with the epoxy resin solution to bond the mica paper and the glass fiber cloth into a whole;

(4) drying: and drying the pressed mica paper and the glass fiber cloth to volatilize the organic solvent in the epoxy resin solution, thereby obtaining the dry mica composite material.

Specifically, the organic solvent in the step (1) includes at least one of ketone, ester, ether alcohol or chlorinated hydrocarbon organic solvents.

Specifically, the organic solvent in the step (1) is acetone or butanone.

Specifically, the mass ratio of the epoxy resin melted in the step (1) to the organic solvent is 1: (0.2-20).

Specifically, a gluing machine is adopted for gluing in the step (2).

Specifically, the drying in the step (4) is performed by using an oven.

Specifically, the drying temperature in the step (4) is 35 ℃ to 100 ℃.

Specifically, the manufacturing method further includes the step (5): a polyethylene film layer is laminated on one surface of the mica composite material mica paper.

Compared with the prior art, the invention has the following advantages and beneficial effects:

the manufacturing method of the mica composite material provided by the invention has the advantages that the process technology is simple, the overall cost of the product is greatly reduced compared with that of a metal piece, the product is light in weight, the product can be cut into sizes of various specifications according to the size requirement of the product, and when the mica composite material is used for a safety protection part of a battery pack of an electric automobile, the overall volume of the battery pack can be reduced, and the space utilization rate of the battery pack is increased; the mica composite material prepared by using mica with high temperature resistance and strong insulating property as a base material and adding the reinforcing material of glass fiber cloth, adhesive and solvent has excellent performance and the density of 2g/cm³About, the flame retardance can reach UL94V-0, the high temperature resistance can be realized, flame burning at 1200 ℃ does not crack, the electrical strength is more than 20KV/mm, and the bending strength at normal temperature is more than 180 MPa.

The present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of a method of making a mica composite material provided by the present invention.

Fig. 2 is a schematic structural view of a mica composite material prepared by the manufacturing method provided by the present invention.

Reference numerals: 1. mica paper; 2. glass fiber cloth; 3. a glue groove; 4. a drum; 5. an oven; 6. a polyethylene film; 7. a winding device; 8. epoxy resin and glass fiber cloth mixed layer.

Detailed Description

The technical solutions in the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Although representative embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that various modifications and changes may be made thereto without departing from the scope of the invention. Therefore, the scope of the present invention should not be limited to the embodiments, but should be defined by the appended claims and equivalents thereof.

The invention provides a method for manufacturing a mica composite material, which comprises the following steps:

(1) preparing an epoxy resin solution: heating and melting solid epoxy resin, mixing the solid epoxy resin with an organic solvent, and fully stirring until the epoxy resin is completely dissolved in the organic solvent, wherein the organic solvent is a volatile organic solvent capable of dissolving the epoxy resin, and comprises at least one of ketone, ester, ether alcohol or chlorinated hydrocarbon organic solvents, and preferably, the organic solvent is acetone or butanone;

wherein the molten epoxy resin is prepared according to the following weight ratio of 1: (0.2-20) mixing the mica composite material with an organic solvent, wherein the mica composite material has different performances corresponding to different mass ratios, and the specific mass ratio can be determined according to actual performance requirements;

(2) gluing: soaking glass fiber cloth into the epoxy resin solution prepared in the step (1), and taking out the glass fiber cloth for later use after the epoxy resin soaks the glass fiber cloth;

preferably, a gluing machine is used for gluing, mica paper and glass fiber cloth are installed at corresponding positions of the gluing machine, the prepared epoxy resin solution is poured into a glue groove of the gluing machine, the gluing machine is started, the glass fiber cloth passes through the glue groove under the action of traction force, and the epoxy resin solution in the glue groove is ensured to soak the glass fiber cloth;

(3) and (3) laminating: the mica paper is pressed on the surface of the glass fiber cloth soaked with the epoxy resin solution, and the mica paper and the glass fiber cloth can be adhered into a whole after pressing because the epoxy resin has excellent adhesiveness; in order to ensure that the mica paper is flatly and uniformly pressed on the surface of the glass fiber cloth, a plurality of pressing procedures can be repeatedly carried out;

(4) drying: drying the pressed mica paper and glass fiber cloth to volatilize the organic solvent in the epoxy resin solution to obtain a dried mica composite material;

specifically, an oven or other heating devices are adopted, the drying temperature is 35-100 ℃, and the drying time is generally 0.5-60min according to the length of a drying line.

In order to improve the moisture resistance, acid and alkali resistance and other properties of the mica composite material and simultaneously avoid the adhesion of the mica paper surface and the glass fiber cloth surface when the mica composite material is rolled and stored subsequently, the manufacturing method provided by the invention also comprises the step (5): a polyethylene film layer is laminated on one surface of mica paper of the mica composite material.

The prepared mica composite material is usually wound on a rotating shaft by a simple winding device, the dried mica composite material is wound layer by layer along with the rotation of a roller and is stored in a roll form, and the mica composite material is packaged and stored by a waterproof film or directly cut into sheet materials according to the size requirement for storage.

The effects of the mica composite material provided by the present invention are examined by the following specific examples.

Example 1:

this example provides a mica composite prepared by the steps of:

(1) preparing an epoxy resin solution: heating and melting the solid epoxy resin until the solid epoxy resin has certain fluidity, and then, mixing the solid epoxy resin with the solid epoxy resin according to the ratio of 1: 1.5, and fully stirring until the epoxy resin is completely dissolved in the acetone;

(2) gluing: adopting a gluing machine to glue, installing a mica paper roll and a glass fiber cloth roll at corresponding positions of the gluing machine, wherein the surfaces of the mica paper and the glass fiber cloth are parallel, pouring the prepared epoxy resin solution into a glue groove of the gluing machine, starting the gluing machine, uncoiling the glass fiber cloth under the action of traction force, and then passing through the glue groove to enable the epoxy resin solution in the glue groove to soak the glass fiber cloth;

(3) and (3) laminating: pressing mica paper on one side surface of the glass fiber cloth soaked with the epoxy resin solution by using a roller of a gluing machine, so that the mica paper and the glass fiber cloth are bonded into a whole;

(4) drying: drying the laminated mica paper and glass fiber cloth through an oven at the drying temperature of 70 ℃ for 30min to volatilize the organic solvent in the epoxy resin solution to obtain a dried mica composite material;

(5) film covering: and pressing a polyethylene film layer on one surface of the dried mica paper of the mica composite material by using a roller.

The performance of the mica composite material is detected, and the density is 2.6g/cm³The flame retardant property is UL94V-0, the flame retardant is high temperature resistant, flame burning at 1200 ℃ does not crack, the electrical strength is 23KV/mm, and the bending strength at normal temperature is 206 MPa.

Example 2:

this example provides a mica composite prepared by the steps of:

(1) preparing an epoxy resin solution: heating and melting the solid epoxy resin until the solid epoxy resin has certain fluidity, and then, mixing the solid epoxy resin with the solid epoxy resin according to the ratio of 1: 2, mixing with acetone, and fully stirring until the epoxy resin is completely dissolved in the acetone;

(2) gluing: adopting a gluing machine to glue, installing a mica paper roll and a glass fiber cloth roll at corresponding positions of the gluing machine, wherein the surfaces of the mica paper and the glass fiber cloth are parallel, pouring the prepared epoxy resin solution into a glue groove of the gluing machine, starting the gluing machine, uncoiling the glass fiber cloth under the action of traction force, and then passing through the glue groove to enable the epoxy resin solution in the glue groove to soak the glass fiber cloth;

(3) and (3) laminating: pressing mica paper on one side surface of the glass fiber cloth soaked with the epoxy resin solution by using a roller of a gluing machine, so that the mica paper and the glass fiber cloth are bonded into a whole;

(4) drying: drying the laminated mica paper and glass fiber cloth through an oven at the drying temperature of 70 ℃ for 40min to volatilize the organic solvent in the epoxy resin solution to obtain a dried mica composite material;

(5) film covering: and pressing a polyethylene film layer on one surface of the dried mica paper of the mica composite material by using a roller.

The performance of the mica composite material is detected, and the density is 2.4g/cm³The flame retardant property is UL94V-0, the flame retardant is high temperature resistant, flame burning at 1200 ℃ does not crack, the electrical strength is 22.5KV/mm, and the bending strength at normal temperature is 203 MPa.

Example 3:

this example provides a mica composite prepared by the steps of:

(1) preparing an epoxy resin solution: heating and melting the solid epoxy resin until the solid epoxy resin has certain fluidity, and then, mixing the solid epoxy resin with the solid epoxy resin according to the ratio of 1: 3, mixing with acetone, and fully stirring until the epoxy resin is completely dissolved in the acetone;

(2) gluing: adopting a gluing machine to glue, installing a mica paper roll and a glass fiber cloth roll at corresponding positions of the gluing machine, wherein the surfaces of the mica paper and the glass fiber cloth are parallel, pouring the prepared epoxy resin solution into a glue groove of the gluing machine, starting the gluing machine, uncoiling the glass fiber cloth under the action of traction force, and then passing through the glue groove to enable the epoxy resin solution in the glue groove to soak the glass fiber cloth;

(3) and (3) laminating: pressing mica paper on one side surface of the glass fiber cloth soaked with the epoxy resin solution by using a roller of a gluing machine, so that the mica paper and the glass fiber cloth are bonded into a whole;

(4) drying: drying the laminated mica paper and glass fiber cloth through an oven at the drying temperature of 70 ℃ for 60min to volatilize the organic solvent in the epoxy resin solution to obtain a dried mica composite material;

(5) film covering: and pressing a polyethylene film layer on one surface of the dried mica paper of the mica composite material by using a roller.

The performance of the mica composite material is detected, and the density is 2.2g/cm³The flame retardant property is UL94V-0, the flame retardant is high temperature resistant, flame burning at 1200 ℃ does not crack, the electrical strength is 21.3KV/mm, and the bending strength at normal temperature is 187 MPa.

The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.