Carbon fiber reinforced thermoplastic resin plate and manufacturing method thereof

Abstract

The invention discloses a carbon fiber reinforced thermoplastic resin plate and a manufacturing method thereof. The manufacturing method comprises the following steps: (1) blending carbon fibers and thermoplastic resin to prepare carbon fiber prepreg; and (2) after laying the carbon fiber prepreg, directly carrying out compression molding at a compression molding temperature without preheating toobtain the carbon fiber reinforced thermoplastic resin plate. In the process of laying the carbon fiber prepreg composed of the carbon fibers and the thermoplastic resin and then carrying out compression molding to prepare the carbon fiber reinforced thermoplastic resin plate, after the carbon fiber prepreg is laid, compression molding is directly carried out between the crystallization temperature and the melting point of the thermoplastic resin base material under the pressure of 0.5MPa or above without preheating, so that the manufacturing process and the cost are saved.

Description

technical field

[0001] The invention relates to the technical field of carbon fiber, in particular to a carbon fiber reinforced thermoplastic resin plate and a manufacturing method thereof. Background technique

[0002] In recent years, the application range of carbon fiber reinforced resin matrix composites formed by combining carbon fiber with various resin matrices as a reinforcing material has continued to expand. Among them, in the aerospace and industrial fields that require high mechanical properties and heat resistance, thermosetting resins such as unsaturated polyester resins, epoxy resins, and polyimide resins are mainly used as substrates. However, thermosetting resins generally have the disadvantages of being brittle and not resistant to impact. For the aerospace field, this must be improved. In addition, prepregs prepared using thermosetting resins not only require harsh storage conditions, but also There are also problems such as many restrictions on the shape...

Examples

Embodiment 1

[0041] Using carbon fiber (domestic T700 grade carbon fiber, 12K) and nylon 6, the melting point measured by nylon 6 is 221°C. Arranged individually, the surface density is 100g / m 2 The carbon fiber spreading sheet is clamped by 30μm nylon 6 film on both sides, heated to 250°C, pressurized at 1MPa to integrate the carbon fiber and the resin film, and then cooled to 80°C to obtain a carbon fiber reinforced nylon prepreg. The thickness of the prepreg is 114 μm, and the volume content of carbon fiber is 48.0%.

[0042] Lay up the prepreg according to (0 / 45 / 90 / -45°), the thickness of the ply is 16 sheets, and an approximately isotropic laminate is obtained. Clamp it with two layers of 1.5mm thick stainless steel plates, place it on a molding machine with a pressure head temperature of 200°C, apply a pressure of 1.0 MPa, press for 8 minutes, and take it out directly to obtain a carbon fiber reinforced thermoplastic resin sheet.

[0043] Each layer of prepreg in the sheet is well ...

Embodiment 2

[0045] Carbon fiber (Toray T700 24K, Japan) and nylon 610 were used, and the measured melting point of nylon 610 was 216°C. The prepreg has a thickness of 132 μm and a carbon fiber volume content of 54.5%. Molding temperature is changed into 210 ℃, and others are identical with embodiment 1.

Embodiment 3

[0047] Carbon fiber (domestic T700 grade, 12K) and polypropylene (PP) are used as the base material, and the measured melting point of PP is 168°C. The thickness of the single-layer PP film in the prepreg is 25 μm, the thickness of the prepreg is 104 μm, and the volume content of carbon fiber is 56.1%. Molding temperature is changed into 160 ℃, and others are identical with embodiment 1.

technical field

[0001] The invention relates to the technical field of carbon fiber, in particular to a carbon fiber reinforced thermoplastic resin plate and a manufacturing method thereof. Background technique

[0002] In recent years, the application range of carbon fiber reinforced resin matrix composites formed by combining carbon fiber with various resin matrices as a reinforcing material has continued to expand. Among them, in the aerospace and industrial fields that require high mechanical properties and heat resistance, thermosetting resins such as unsaturated polyester resins, epoxy resins, and polyimide resins are mainly used as substrates. However, thermosetting resins generally have the disadvantages of being brittle and not resistant to impact. For the aerospace field, this must be improved. In addition, prepregs prepared using thermosetting resins not only require harsh storage conditions, but also There are also problems such as many restrictions on the shape...

Examples

Embodiment 1

[0041] Using carbon fiber (domestic T700 grade carbon fiber, 12K) and nylon 6, the melting point measured by nylon 6 is 221°C. Arranged individually, the surface density is 100g / m 2 The carbon fiber spreading sheet is clamped by 30μm nylon 6 film on both sides, heated to 250°C, pressurized at 1MPa to integrate the carbon fiber and the resin film, and then cooled to 80°C to obtain a carbon fiber reinforced nylon prepreg. The thickness of the prepreg is 114 μm, and the volume content of carbon fiber is 48.0%.

[0042] Lay up the prepreg according to (0 / 45 / 90 / -45°), the thickness of the ply is 16 sheets, and an approximately isotropic laminate is obtained. Clamp it with two layers of 1.5mm thick stainless steel plates, place it on a molding machine with a pressure head temperature of 200°C, apply a pressure of 1.0 MPa, press for 8 minutes, and take it out directly to obtain a carbon fiber reinforced thermoplastic resin sheet.

[0043] Each layer of prepreg in the sheet is well ...

Embodiment 2

[0045] Carbon fiber (Toray T700 24K, Japan) and nylon 610 were used, and the measured melting point of nylon 610 was 216°C. The prepreg has a thickness of 132 μm and a carbon fiber volume content of 54.5%. Molding temperature is changed into 210 ℃, and others are identical with embodiment 1.

Embodiment 3

[0047] Carbon fiber (domestic T700 grade, 12K) and polypropylene (PP) are used as the base material, and the measured melting point of PP is 168°C. The thickness of the single-layer PP film in the prepreg is 25 μm, the thickness of the prepreg is 104 μm, and the volume content of carbon fiber is 56.1%. Molding temperature is changed into 160 ℃, and others are identical with embodiment 1.

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