CN115339208A

CN115339208A - Lightweight composite panel and method for lightening a composite panel using solid silica gel

Info

Publication number: CN115339208A
Application number: CN202110527950.XA
Authority: CN
Inventors: 卢彦名
Original assignee: Mitac Precision Technology Kunshan Ltd
Current assignee: Mitac Precision Technology Kunshan Ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2022-11-15

Abstract

The invention discloses a light composite plate and a method for lightening the composite plate by using solid silica gel. Wherein, light composite material board includes: the first base material layer is positioned on the bottom layer; the second base material layer is arranged on the first base material layer; and the solid silica gel foaming layer is filled between the first substrate layer and the second substrate layer and is formed by mixing and reacting solid silica gel and a foaming agent.

Description

Lightweight composite panel and method for lightening composite panel using solid silica gel

Technical Field

The invention relates to the technical field of composite materials, in particular to a light composite material plate and a method for lightening the composite material plate by using solid silica gel.

Background

The lightweight thermoplastic composite material plate is beneficial to the rapid production of lightweight composite materials, and when the lightweight thermoplastic composite material plate is used for shell structures, such as mobile phone shells, mouse shells and shells of iPad \8230, 8230, and lightweight and non-strength interlayer materials are filled between the composite materials, so that the weight can be greatly reduced, and the required strength can be maintained. Such as a honeycomb pack or a drum-type structure. However, filling at a thickness of 2.0mm or less and not generating bubbles of 0.5mm or more is a bottleneck encountered at present.

Disclosure of Invention

The invention provides a light composite plate, aiming at solving the problem that a weight-reducing interlayer cannot be simply filled in a thinner space in the prior art.

In order to achieve the technical purpose, the following technical scheme is adopted in the application:

a lightweight composite panel, comprising: the first base material layer is positioned on the bottom layer; the second base material layer is arranged on the first base material layer; and the solid silica gel foaming layer is filled between the first base material layer and the second base material layer, and is formed by mixing solid silica gel with a vulcanizing agent and a foaming agent and reacting at 180 ℃.

Preferably, the vulcanizing agent and the foaming agent are added into the solid silica gel, and the total weight of the vulcanizing agent and the foaming agent is not more than 10 percent of the total weight.

Preferably, the upper surface and the lower surface of the solid silica gel foaming layer are respectively adhered to the first base material layer and the second base material layer through a bonding layer, and the bonding layer is formed by coating a colloid material.

Preferably, the first substrate layer and the second substrate layer are made of carbon fiber materials or glass fiber materials respectively.

The light composite material plate is simple in structure, can be filled between thin layers, and can greatly reduce the overall weight of the composite material plate.

The invention also discloses a method for lightening the composite material plate by using the solid silica gel, which comprises the following steps: s1: mixing a foaming agent into the solid silica gel, and mixing; s2: before the foaming reaction starts, coating the mixed solid silica gel and foaming agent mixture on the upper surface of the first base material layer; s3: stacking a second base material layer in the coating area to form a composite layer; s4: and placing the composite layer in a hot-pressing mould until the solid silica gel and foaming agent mixture is cured.

Preferably, in S1, a sulfiding agent is mixed into the solid silica gel in advance.

Preferably, the first substrate layer and the second substrate layer are coated with a bonding layer on one surface contacting with the solid silica gel, and the bonding layer is formed by coating a colloid material.

Preferably, in S1, the roll bar temperature of the twin roll machine does not exceed 15 ℃.

Preferably, in S1, the mixture of solid gum and foaming agent is repeatedly fed to the roll mill at least 5 times.

By adopting the technical scheme, the method for filling the weight-reducing interlayer between the thin layers is simplified, the process is optimized, the manufacturing cost is reduced, and a better weight-reducing effect is achieved.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present application before curing.

Fig. 2 is a schematic view of the cured structure of fig. 1.

FIG. 3 is a block flow diagram of a method of the present application.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.

Referring to fig. 1 and 2, fig. 1 is a schematic structural view of an embodiment of the present application before curing; fig. 2 is a schematic view of the cured structure of fig. 1. The light composite material plate in the embodiment includes a first substrate layer 1, a second substrate layer 2, a solid silica gel foaming layer 3, and the like.

The material of the first substrate layer and the second substrate layer is carbon fiber or glass fiber, but not limited thereto. The first substrate layer 1 is located the bottom, and the second substrate layer 2 piles up on first substrate layer 1, and solid silica gel foaming layer 3 fills between first substrate layer 1 and second substrate layer 2. The solid silica gel foaming layer 3 is formed by mixing and reacting solid silica gel and a foaming agent, and a vulcanizing agent is added into the solid silica gel so as to generate a vulcanization reaction and shape the solid silica gel.

Referring to fig. 1 and 2, the upper surface and the lower surface of the solid silica gel foaming layer 3 are respectively adhered to the first substrate layer 1 and the second substrate layer 2 through a bonding layer 4, and the bonding layer 4 is formed by coating a colloid material.

Referring to fig. 3, fig. 3 is a block flow diagram of a method of the present application. The method for lightening the composite material plate by using the solid silica gel comprises the following steps:

in the first step S1, a foaming agent is mixed with a solid silica gel and kneaded. Wherein a vulcanizing agent is mixed in advance into the solid silica gel. Wherein the temperature of a roller rod of the double-roller machine is not more than 15 ℃. Meanwhile, in S1, the mixture of the solid gum and the foaming agent needs to be repeatedly input into the twin-roll machine at least 5 times to ensure the uniformity of mixing.

And S2, coating a jointing layer on one surface of the first substrate layer and the second substrate layer, which is in contact with the solid silica gel, wherein the jointing layer is formed by coating a colloid material.

And a third step S3 of applying the kneaded solid silica gel and foaming agent mixture to the upper surface of the first base material layer 1 before the foaming reaction starts.

In the fourth step S4, the second substrate layer 2 is stacked in the coating region to form a composite layer.

And a fifth step S5, placing the composite layer in a hot-pressing mold, and performing thermoplastic molding until the mixture of the solid silica gel and the foaming agent is cured.

The purpose of controlling the size of the bubbles is achieved by uniformly mixing, dispersing the foaming agent and controlling the thickness of the hot-pressing die cavity. The method for filling the weight-reducing interlayer between the thin layers is simplified, the process is optimized, the manufacturing cost is reduced, and a better weight-reducing effect is achieved.

The above-described embodiments are merely illustrative of the present invention and are not intended to limit the scope of the present invention. All equivalent changes and modifications of the invention that may occur to those skilled in the art are intended to be covered by the appended claims.

Claims

1. A lightweight composite panel, comprising:

the first base material layer is positioned on the bottom layer;

the second substrate layer is arranged on the first substrate layer; and

and the solid silica gel foaming layer is filled in the first base material layer and between the second base material layers, and is formed by mixing solid silica gel with a vulcanizing agent and a foaming agent and reacting at 180 ℃.

2. The lightweight composite board of claim 1, wherein the solid silica gel has vulcanizing agent and blowing agent added thereto, totaling no more than 10% of the total weight.

3. The lightweight composite board as recited in claim 1, wherein the upper surface and the lower surface of the solid silicone foam layer are adhered to the first substrate layer and the second substrate layer by a bonding layer, respectively, and the bonding layer is formed by coating a colloidal material.

4. The light composite board according to claim 1, wherein the material of the first substrate layer and the second substrate layer is carbon fiber or glass fiber.

5. A method of lightening a composite sheet using solid silica gel, the method comprising the steps of:

s1: mixing a foaming agent into the solid silica gel, and mixing by using a double-roller machine;

s2: before the foaming reaction starts, coating the mixed solid silica gel and the foaming agent mixture on the upper surface of a first substrate layer;

s3: stacking a second substrate layer in the coating area to form a composite layer; and

s4: placing the composite layer in a hot press mold until the curing of the solid silica gel and the blowing agent mixture is complete.

6. The method for lightening composite material plates using solid silica gel according to claim 5, wherein in the S1, a vulcanizing agent is previously mixed in the solid silica gel.

7. The method of claim 6, wherein the first and second substrate layers are coated with a tie layer on the side in contact with the solid silica gel, wherein the tie layer is formed by coating a gum material.

8. The method for lightening composite material plates using solid silica gel according to claim 5, wherein in S1, a temperature of a roll bar of the twin roll machine is not more than 15 ℃.

9. The method for lightening composite boards using solid silica gel according to claim 5 or 8, wherein in the step S1, the mixture of the solid silica gel and the foaming agent is repeatedly fed into the twin roll machine at least 5 times.