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Polypropylene composite material, and preparation method and application thereof

A composite material, polypropylene technology, applied in the field of polypropylene composite material and its preparation, can solve the problems of high shear heat, screw torque and motor current, poor folding resistance, high cost reduction pressure, etc., to shorten the processing cycle , The preparation method is simple and easy, and the effect is cost-effective

Active Publication Date: 2013-10-02
TIANJIN KINGFA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, automotive cable ties are mainly prepared by blending and modifying nylon materials and maleic anhydride grafted thermoplastic elastomers. This material has excellent heat resistance, aging resistance and low-temperature toughness, and it does not turn white after folding. However, because the thermoplastic elastomer is distributed in the shape of sea islands in the nylon matrix, it is not compatible at the molecular level, so the folding resistance of the material is poor. At the same time, the price of nylon material and maleic anhydride grafted thermoplastic elastomer is very expensive, and the cost reduction pressure Very big
[0004] Metallocene polypropylene elastomer has excellent elasticity, folding resistance and low temperature toughness, but when it is applied to extrusion processing, the shear heat, screw torque and motor current are high, which limits its application

Method used

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  • Polypropylene composite material, and preparation method and application thereof
  • Polypropylene composite material, and preparation method and application thereof
  • Polypropylene composite material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: comparative example

[0032] Melt, mix and disperse 100Kg of random copolymerized polypropylene PP SM256 (Sinopec, melt flow rate 3g / 10min) in a twin-screw extruder with a length-to-diameter ratio of 40:1. The temperature is 180°C, the temperature in the third zone is 200°C, the temperature in the fourth zone is 200°C, the temperature in the fifth zone is 200°C, the temperature in the sixth zone is 200°C, the temperature in the seventh zone is 190°C, and the temperature in the eighth zone is 180°C. granules, and finally obtain a polypropylene composite material.

Embodiment 2

[0033] Embodiment 2: the preparation of polypropylene composite material

[0034] 70Kg homopolypropylene (PP T30S, Sinopec, melt flow rate 3g / 10min), 23.5Kg random copolymerized polypropylene (PP SM198, Malaysia Dateng), 0.5Kg phenolic heat stabilizer (1010, Ciba), 0.5 Kg phosphite heat stabilizer (627A, Ciba), 0.5 kg polypropylene special nucleating agent (HPN-20E, Milliken), 5Kg ExxonMobil metallocene polypropylene (VM6102, 95% propylene content, Melt flow rate 2g / 10min), melt mixing and dispersion in a twin-screw extruder with an aspect ratio of 40:1, where the temperature in the first zone is 120°C, the temperature in the second zone is 180°C, and the temperature in the third zone is 200°C , The temperature of the fourth zone is 200°C, the temperature of the fifth zone is 200°C, the temperature of the sixth zone is 200°C, the temperature of the seventh zone is 190°C, and the temperature of the eighth zone is 180°C, extrude and granulate, and finally obtain a polypropylene ...

Embodiment 3

[0035] Embodiment 3: the preparation of polypropylene composite material

[0036] 88Kg polypropylene (PP S700, Sinopec, melt flow rate 10g / 10min), 1Kg phenolic heat stabilizer (1010, Ciba), 1Kg thioester heat stabilizer (412S, Yabao), 2Kg polypropylene Special nucleating agent (Millad3988, Milliken), 9Kg ExxonMobil metallocene polypropylene (VM3980, 90% propylene content, melt flow rate 18g / 10min) were extruded by a twin-screw with an aspect ratio of 40:1 Melting, mixing and dispersing in the machine, where the temperature in the first zone is 120°C, the temperature in the second zone is 180°C, the temperature in the third zone is 200°C, the temperature in the fourth zone is 200°C, the temperature in the fifth zone is 200°C, the temperature in the sixth zone is 200°C, The temperature in the seventh zone is 190°C, and the temperature in the eighth zone is 180°C. Extrude and granulate, and finally obtain a polypropylene composite material.

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Abstract

The invention belongs to the field of high molecular materials and contour machining thereof, and discloses a polypropylene composite material, and a preparation method and application thereof. The polypropylene composite material comprises the following components in percentage by mass: 81-93.5% of polypropylene, 5-17.5% of metallocene polypropylene elastomer, 1-2% of heat stabilizer and 0.5-2% of special nucleating agent for polypropylene. The invention also discloses the preparation method of the polypropylene composite material, which comprises the following steps: performing mixed dispersion on the polypropylene, the metallocene polypropylene elastomer, the heat stabilizer and the special nucleating agent for polypropylene, extruding, and granulating to obtain the polypropylene composite material. For the polypropylene composite material prepared by the invention, the tensile strength is at least 25 MPa, the normal-temperature notch impact strength is at least 5 KJ / m<2>, the break extension is at least 400%, the hinge folding number at -20 DEG C is at least 104 times, and the break extension retention rate after oxidative aging is at least 95%; and the polypropylene composite material can be used for preparation of ties for automobiles.

Description

technical field [0001] The invention belongs to the field of polymer materials and their molding processing, in particular to a polypropylene composite material and its preparation method and application. Background technique [0002] Automotive cable ties play an important role in fixing the internal cable harness of the car. Since the ambient temperature of the automotive cable harness ranges from extremely low temperature -40°C to extremely high temperature 85°C, automotive cable tie materials generally have excellent heat aging resistance, excellent Excellent heat resistance, excellent low temperature toughness and excellent folding resistance, and whitening is not allowed after folding. [0003] At present, automotive cable ties are mainly prepared by blending and modifying nylon materials and maleic anhydride grafted thermoplastic elastomers. This material has excellent heat resistance, aging resistance and low-temperature toughness, and it does not turn white after fo...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/14
Inventor 李晟袁志敏刘乐文聂德林陶四平钱永红欧阳晓岳
Owner TIANJIN KINGFA NEW MATERIAL