Engineering plastic and manufacturing method thereof

Abstract

The invention discloses engineering plastic and a manufacturing method thereof. The engineering plastic is prepared from the following components in percentage by mass: 60 to 67 percent of plastic raw materials, 8 to 10 percent of PP (Propene Polymer) compatilizer, 17 to 20 percent of glass fiber, 1 to 2 percent of antioxidant nucleating agent and 0.8 to 1 percent of color master batch. Parts made of the engineering plastic are small in deformation and not prone to warping, and the quality of the parts is guaranteed.

Description

TECHNICAL FIELD

[0001] The application relates to an engineering plastic and a manufacturing method thereof, and belongs to the technical field of engineering plastic materials. BACKGROUND

[0002] Engineering plastics are widely used in manufacturing of some parts and materials of parts. However, some long parts manufactured by the ordinary engineering plastics in the prior art are prone to deformation and warping, which affects the quality of the parts and causes the products to fail to meet the requirements of customers. SUMMARY

[0003] To solve the above technical problems, the application provides an engineering plastic, which comprises the following components in percentage of mass content: 60-67% of plastic raw materials, 8-10% of PP compatibilizers, 17-20% of glass fibers, 1-2% of antioxidant nucleating agents and 0.8-1% of color masterbatches.

[0004] Preferably, the plastic raw materials are one of PA, PC, PP and ABS plastics.

[0005] Preferably, the PP raw materials account for 67%, the PP compatibilizers account for 10%, the glass fibers account for 17%, the antioxidant nucleating agents account for 2% and the color masterbatches account for 1%.

[0006] The application further provides a manufacturing method of the engineering plastic, which comprises the following steps: (1) drying and preheating plastic raw material particles in a drying machine, and then stirring the plastic raw material particles in a stirrer; (2) heating the stirred plastic raw material particles to 180-220 DEG C in a screw extruder to make the plastic raw materials in a molten state and extruded into a long strip shape from the discharge port of the screw extruder, and then cooling into a solid state and cutting into finished particles.

[0007] Preferably, the length of the glass fibers in the finished particles is 2-5 cm.

[0008] The engineering plastic has the advantages that the parts manufactured by the engineering plastic are less prone to deformation and warping, and the quality of the parts is guaranteed. DETAILED DESCRIPTION

[0009] The technical solutions in the embodiments of the application will be described clearly and completely below. Obviously, the described embodiments are only some of the embodiments of the application, but not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the application.

[0010] An engineering plastic comprising the following components by mass percentage: 60-67% plastic raw material, 8-10% PP compatibilizer, 17-20% glass fiber, 1-2% antioxidant nucleating agent, and 0.8-1% color masterbatch.

[0011] Preferably, the plastic raw material is one of PA, PC, PP and ABS plastics.

[0012] Preferably, the raw material comprises 67% PP, 10% PP compatibilizer, 17% glass fiber, 2% antioxidant nucleating agent, and 1% color masterbatch. The glass fiber in the finished granules cut from the above engineering plastics is 2-5cm in length. Glass fiber can improve the warpage deformation of plastic products, and glass fiber with a length of 2-5cm has a better effect on improving warpage deformation.

[0013] Nucleating agents can accelerate the crystallization rate of PP raw materials. The faster the crystallization rate, the shorter the cooling time during injection molding, and the smaller the warpage. The choice of PP raw material affects warpage; choosing a raw material with a fast molding speed results in a shorter setting time during injection molding and smaller warpage.

[0014] The present invention also provides a method for manufacturing the above-mentioned engineering plastic, comprising the following steps: (1) Dry and preheat the plastic raw material particles in a dryer, and then stir the plastic raw material particles in a mixer; (2) The mixed plastic raw material granules are put into the screw extruder and heated to 180-220°C, so that the plastic raw material is in a molten state and is extruded from the screw extruder outlet into long strips, then cooled into solid and cut into finished granules.

[0015] The engineering plastics manufactured by the above method have less warping deformation during injection molding. After testing, the warping deformation of products injection molded using the engineering plastics of this invention is reduced by more than 30% compared with products injection molded using ordinary plastics.

[0016] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An engineering plastic, comprising the following ingredients in mass percentage: 60-67% of plastic raw material, 8-10% of PP compatibilizer, 17-20% of glass fiber, 1-2% of antioxidant nucleating agent, and 0.8-1% of color masterbatch.

2. The engineering plastic according to claim 1, characterized in that The plastic raw material is one of PA, PC, PP and ABS plastic.

3. The engineering plastic according to claim 2, characterized in that The PP raw material accounts for 67%, the PP compatibilizer accounts for 10%, the glass fiber accounts for 17%, the antioxidant nucleating agent accounts for 2%, and the color masterbatch accounts for 1%.

4. A method of producing the engineering plastic according to any one of claims 1 to 3, characterized by, The method comprises the following steps: (1) drying and preheating the plastic raw material particles in a dryer, and then stirring the plastic raw material particles in a stirrer; (2) placing the stirred plastic raw material particles into a screw extruder and heating to 180-220℃, so that the plastic raw material is in a molten state and is extruded into a strip shape from the discharge port of the screw extruder, and then cooled into a solid state and cut into finished particles.

5. The method of producing an engineering plastic according to claim 4, characterized by The length of the glass fiber in the finished particles is 2-5 cm.