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Polypropylene micro-foamed material with high surface quality and preparation method thereof

A technology of polypropylene and micro-foaming, applied in the direction of coating, etc., to achieve the effect of improving surface quality, excellent performance and low cost

Active Publication Date: 2015-10-28
NANJING JULONG SCI&TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there is no effective method to solve this technical problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 50 parts of polypropylene with a melt index of 10g / 10min, 40 parts of talcum powder, and 3 parts of micro-foaming adjustment aids (by weight fraction 20% ethylene-propylene-diene terpolymer and 80% high melt strength Composed of polypropylene, the melt strength is 20cN), the mixture of 1.2 parts of antioxidant 168 and 0.8 parts of antioxidant 1010 is put into a high-speed mixer, mixed for 6 minutes, and then the above-mentioned component mixture is put into a twin-screw extruder Extrude and pelletize. The barrel temperature of the twin-screw extruder is set at 170-270°C, and the screw speed is 50r / min; finally, 5 parts of azodicarbonamide and 95 parts of the above extruded pellets are evenly mixed, and then added to the injection molding machine to obtain high Surface quality polypropylene microfoam composite. The barrel temperature of the injection molding machine is set at 180-280°C, the injection pressure is 60MPa, the injection speed is 70mm / s, and the cooling time...

Embodiment 2

[0036] 80 parts of polypropylene with a melt index of 26g / 10min, 10 parts of barium sulfate, and 9.3 parts of micro-foaming regulator (consisting of 50% linear low-density polyethylene and 50% high-melt strength polypropylene by weight fraction, melt The strength is 22 cN), the mixture of antioxidant 168 0.12 parts, antioxidant 1010 0.08 parts is put into a high-speed mixer, mixed for 3 minutes, and then the above-mentioned component mixture is extruded in a twin-screw extruder and pelletized . The barrel temperature of the twin-screw extruder is set at 170-270°C, and the screw speed is 50r / min; finally, mix 0.5 parts of foaming agent amine azodicarbonate with 99.5 parts of the above extruded pellets, add them to the injection molding machine, and inject Molded to obtain high surface quality polypropylene microfoam composite material. The barrel temperature of the injection molding machine is set at 180-280°C, the injection pressure is 50MPa, the injection speed is 80mm / s, an...

Embodiment 3

[0039] 60 parts of polypropylene with a melt index of 40g / 10min, 18 parts of calcium carbonate, and 10 parts of micro-foaming adjustment aids (consisting of 45% ethylene-vinyl acetate copolymer and 55% high-melt strength polypropylene by weight fraction, melted The body strength is 25 cN), the mixture of 1.2 parts of antioxidant 168 and 0.8 parts of antioxidant 1010 was put into a high-speed mixer and mixed for 5 minutes. Then, the above-mentioned component mixture was extruded in a twin-screw extruder and made grain. The barrel temperature of the twin-screw extruder is set at 170-270°C, and the screw speed is 50r / min; finally, 10 parts of foaming agent sodium bicarbonate and 90 parts of the above-mentioned extruded pellets are evenly mixed, put into the injection molding machine, and injection molded to obtain High surface quality polypropylene microfoam composite. The barrel temperature of the injection molding machine is set at 180-280°C, the injection pressure is 80MPa, t...

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Abstract

The invention relates to a polypropylene material and a preparation method thereof, especially to a polypropylene micro-foamed material with high surface quality and a preparation method thereof, belonging to the technical field of high-molecular materials. The polypropylene micro-foamed material comprises the following raw materials by weight: 50 to 80 parts of polypropylene, 10 to 40 parts of inorganic powder, 3 to 10 parts of a micro-foaming adjusting auxiliary agent, 0.5 to 5 parts of a foaming agent and 0.2 to 2 parts of an anti-oxidant. Through the micro-foaming adjusting auxiliary agent, surface quality of the polypropylene micro-foamed material is substantially improved, the severe surface quality problems like surface scratches and gas marks on a polypropylene micro-foamed product in the process of injection molding are overcome, and the polypropylene micro-foamed material with excellent performance and high surface quality is obtained. The prepared polypropylene micro-foamed material is applicable to skinned and fabric-covered automobile components and to interior and exterior trimming parts for an automobile in a visual environment, e.g., door trim panels, guard boards of columns, hallstands, instrument desks, air-conditioner shells, guard boards for side skirts, scuff plates, thereby realizing lightweighting of materials for automobile parts; and the material is also applicable to other fields like architecture, electronics and shipbuilding.

Description

technical field [0001] The invention relates to a polypropylene composite material and a preparation method thereof, in particular to a high-surface-quality polypropylene microfoam composite material and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Under the dual pressure of energy crisis and environmental pollution, lightweight has become an inevitable trend in the development of the automobile industry. Among the plastics used in vehicles, the amount of modified polypropylene materials has always occupied the first place, and its types of parts are also the largest, and it is still growing at an annual rate of 2.2%-2.8%. The polypropylene micro-foaming material has a unique dense surface layer and a foaming core layer structure. On the premise of ensuring the basic performance of the material, it can significantly reduce the weight of the part, realize the lightweight of the car, and finally realize ener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/08C08L23/06C08K3/34C08K3/30C08K3/26B29B9/06B29C45/00
CPCC08J2203/02C08J2203/04C08J2323/08C08J2323/12C08J2423/06C08J2423/08C08J2423/12C08L23/0815C08L23/12C08L2203/14C08L2205/025C08L2205/03C08L2207/062C08L23/083C08L23/0853C08L23/06C08K3/34C08K2003/3045C08K2003/265
Inventor 王滨吴汾蒋顶军周勇汪信
Owner NANJING JULONG SCI&TECH CO LTD
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