Special PA (Polyamide) material for intake manifold of automobile engine

Abstract

The invention discloses a special PA material for an intake manifold of an automobile engine. The special PA material comprises the following components in parts by weight: 30-80 parts of PA resin; 10 to 25 parts of glass fiber; 8 to 15 parts of carbon fiber prepreg; 3-6 parts of silicon dioxide powder; 5-18 parts of a flame retardant; 0.2 to 1.2 parts of an antioxidant; and 0.1 to 1.5 parts of a lubricant. The PA resin, the glass fiber, the carbon fiber prepreg and the silicon dioxide powder are used as raw materials and are mixed to prepare the automobile engine intake manifold, so that the heat resistance is improved, and the problems of easy deformation and low strength are prevented.

Description

Technical Field

[0001] The invention belongs to the technical field of PA materials, and in particular relates to a PA material specially used for an intake manifold of an automobile engine. Background Art

[0002] The automobile industry is a pillar industry of my country's national economy. Realizing automobile lightweighting has become an important measure for the country to save energy in the development of the automobile industry. Lightweighting of automobiles means reducing the weight of automobiles as much as possible while ensuring the strength, safety and other performance of automobiles, thereby improving the power of automobiles, reducing fuel consumption and reducing exhaust pollution. Statistical studies have shown that for every 10% weight reduction of passenger cars, fuel consumption can be reduced by 6%-8%, and every 1L reduction in gasoline consumption will reduce 2.5Kg of CO2 emissions.

[0003] Plasticization of automotive materials is an important means to achieve lightweighting of automobiles. In developed countries, the use of automotive plastics has exceeded 15% of the total plastic consumption, and the use of plastic composite materials in automobiles has approached 20% of the weight of the entire vehicle, effectively achieving lightweighting and reducing fuel consumption.

[0004] Plastic is a synthetic polymer material. Common types of plastics include polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polystyrene (PS), polyamide (PA), acrylonitrile butadiene styrene copolymer (ABS), etc. Plastics are divided into general plastics and engineering plastics according to their uses. Engineering plastics are plastics that can be used as engineering structural materials and to replace metals to manufacture machine parts, among which PA materials are particularly prominent.

[0005] The intake manifold is an important part of the automobile engine. It was originally made of cast iron, and later it was made of cast aluminum, which reduced its weight by 50%. At present, it is widely used to make long fiber reinforced thermoplastic composite materials (PA6+GF30) composed of polyamide (PA) and glass fiber (GF), which is 40%-50% lighter than cast aluminum. PA6+GF30 has high mechanical and dimensional stability, good heat resistance and high impact strength, but PA6+GF30 has a large molding shrinkage rate and poor high temperature resistance. The surface of the processed parts is prone to obvious shrinkage and deformation, and the scrap rate is high, which seriously affects the appearance quality of the parts; PA6+GF30 has a high density, which has a negative impact on reducing the weight of the manifold; the price of polyamide (PA) is high, resulting in high cost of PA6+GF30 and reduced economic benefits.

[0006] Therefore, further optimization of PA materials is needed. Summary of the invention

[0007] In view of this, the technical problem to be solved by the present invention is to provide a PA material specially used for automobile engine intake manifold, so as to avoid the problems of poor heat resistance, easy deformation and low strength of the previous plastic automobile engine intake manifold.

[0008] In order to solve the above technical problems, the present invention discloses a PA material specially used for an automobile engine intake manifold, which comprises, by weight: 30-80 parts of PA resin; Glass fiber 10-25 parts; 8-15 parts of carbon fiber prepreg; 3-6 parts of silicon dioxide powder; Flame retardant 5-18 parts; Antioxidant 0.2-1.2 parts; Lubricant 0.1-1.5 parts.

[0009] According to one embodiment of the present invention, the invention comprises, by weight: 30 parts of PA resin; Glass fiber 10 parts; 8 parts of carbon fiber prepreg; 3 parts of silicon dioxide powder; 5 parts of flame retardant; 0.2 parts of antioxidant; Lubricant 0.1 parts.

[0010] According to one embodiment of the present invention, the invention comprises, by weight: 80 parts of PA resin; Glass fiber 25 parts; 15 parts of carbon fiber prepreg; 6 parts of silicon dioxide powder; Flame retardant 18 parts; 1.2 parts of antioxidant; 1.5 parts of lubricant.

[0011] According to one embodiment of the present invention, the invention comprises, by weight: 55 parts of PA resin; Glass fiber 17 parts; 11 parts of carbon fiber prepreg; 4.5 parts of silicon dioxide powder; Flame retardant 12 parts; 0.7 parts of antioxidant; 0.8 parts of lubricant.

[0012] According to one embodiment of the present invention, the carbon fiber prepreg is carbon fiber pre-impregnated in a polytetrafluoroethylene and epoxy resin dispersion suspension, and dried at 120°C for standby use, and the mass ratio of polytetrafluoroethylene to epoxy resin in the polytetrafluoroethylene and epoxy resin dispersion suspension is 1.5:5.

[0013] Compared with the prior art, the present invention can achieve the following technical effects: PA resin, glass fiber, carbon fiber prepreg and silica powder are used as raw materials and mixed to prepare the intake manifold of automobile engines to improve heat resistance and prevent deformation and low strength.

[0014] Of course, any product implementing the present invention does not necessarily need to achieve all of the above-mentioned technical effects at the same time. DETAILED DESCRIPTION

[0015] The following will describe the implementation methods of the present invention in detail with reference to examples, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0016] The present invention discloses a PA material specially used for an automobile engine intake manifold, which comprises, by weight: 30-80 parts of PA resin; Glass fiber 10-25 parts; 8-15 parts of carbon fiber prepreg; 3-6 parts of silicon dioxide powder; Flame retardant 5-18 parts; Antioxidant 0.2-1.2 parts; Lubricant 0.1-1.5 parts.

[0017] Among them, the carbon fiber prepreg is carbon fiber pre-impregnated in a polytetrafluoroethylene and epoxy resin dispersion suspension, and dried at 120°C for standby use. The mass ratio of polytetrafluoroethylene to epoxy resin in the polytetrafluoroethylene and epoxy resin dispersion suspension is 1.5:5. After the carbon fiber prepreg is put into other raw materials for high temperature and high pressure molding, the strength of the PA material can be improved, and its toughness and chemical stability are enhanced. With glass fiber and silica powder, the temperature resistance is improved.

[0018] Embodiment 1, comprises by weight: 30 parts of PA resin; Glass fiber 10 parts; 8 parts of carbon fiber prepreg; 3 parts of silicon dioxide powder; 5 parts of flame retardant; 0.2 parts of antioxidant; Lubricant 0.1 parts.

[0019] In the test of the intake manifold prepared by the thermoplastic process, its pressure strength is qualified at 80KPa, its temperature resistance reaches 210℃, and its air tightness and corrosion resistance are qualified. After the working temperature changes back and forth between 30-130℃ for 20,000 times, the intake manifold has no deformation.

[0020] Embodiment 2, wherein comprises by weight: 80 parts of PA resin; Glass fiber 25 parts; 15 parts of carbon fiber prepreg; 6 parts of silicon dioxide powder; Flame retardant 18 parts; 1.2 parts of antioxidant; 1.5 parts of lubricant.

[0021] In the test of the intake manifold prepared by the thermoplastic process, its pressure strength is qualified at 100KPa, its temperature resistance reaches 200℃, and its air tightness and corrosion resistance are qualified. After the working temperature changes back and forth between 30-130℃ for 20,000 times, the intake manifold has no deformation.

[0022] Embodiment 3, wherein comprises by weight: 55 parts of PA resin; Glass fiber 17 parts; 11 parts of carbon fiber prepreg; 4.5 parts of silicon dioxide powder; Flame retardant 12 parts; 0.7 parts of antioxidant; 0.8 parts of lubricant.

[0023] In the test of the intake manifold prepared by the thermoplastic process, its pressure strength is qualified at 140KPa, its temperature resistance reaches 230℃, and its air tightness and corrosion resistance are qualified. After the working temperature changes back and forth between 30-130℃ for 20,000 times, the intake manifold has no deformation.

[0024] In summary, the present invention uses PA resin, glass fiber, carbon fiber prepreg, and silica powder as raw materials, which are mixed and prepared for automobile engine intake manifolds to improve heat resistance and prevent easy deformation and low strength.

[0025] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A PA material specially used for automobile engine intake manifold, characterized in that: The parts by weight include: 30-80 parts of PA resin; Glass fiber 10-25 parts; 8-15 parts of carbon fiber prepreg; 3-6 parts of silicon dioxide powder; Flame retardant 5-18 parts; Antioxidant 0.2-1.2 parts; Lubricant 0.1-1.5 parts.

2. The PA material for automobile engine intake manifold according to claim 1, characterized in that: The parts by weight include: 30 parts of PA resin; Glass fiber 10 parts; 8 parts of carbon fiber prepreg; 3 parts of silicon dioxide powder; 5 parts of flame retardant; 0.2 parts of antioxidant; Lubricant 0.1 parts.

3. The PA material for automobile engine intake manifold according to claim 1, characterized in that: The parts by weight include: 80 parts of PA resin; Glass fiber 25 parts; 15 parts of carbon fiber prepreg; 6 parts of silicon dioxide powder; Flame retardant 18 parts; 1.2 parts of antioxidant; 1.5 parts of lubricant.

4. The PA material for automobile engine intake manifold according to claim 1, characterized in that: The parts by weight include: 55 parts of PA resin; Glass fiber 17 parts; 11 parts of carbon fiber prepreg; 4.5 parts of silicon dioxide powder; Flame retardant 12 parts; 0.7 parts of antioxidant; 0.8 parts of lubricant.

5. The PA material for automobile engine intake manifold according to claim 1, characterized in that: The carbon fiber prepreg is carbon fiber pre-impregnated in a polytetrafluoroethylene and epoxy resin dispersion suspension and dried at 120° C. for standby use. The mass ratio of polytetrafluoroethylene to epoxy resin in the polytetrafluoroethylene and epoxy resin dispersion suspension is 1.5:5.