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Polypropylene foaming masterbatch and production method thereof

A technology of foaming masterbatch and polypropylene, which is applied in the field of polypropylene foaming masterbatch and its preparation, can solve problems such as failure to consider cell dispersion and cell structure, difficulty in industrial production, high production cost, etc., and achieve The subsidence is not obvious, the effect of overcoming the high production cost and good uniformity

Active Publication Date: 2012-08-15
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Publication number is CN102046706A " physical foaming polyethylene foam " adopts physical foaming (low boiling point liquid isobutane), extruder output is 3.5kg / hour, and the injection rate of isobutane is 10ml / min, has obtained Foamed products with relatively dense cells and uniform cell diameters, however, the production cost is high, the process is more complicated, and the requirements for equipment are high
Publication No. CN101792554A "A Micro-foamed Polypropylene and Its Preparation Method" uses extrusion or molding methods to prepare micro-foamed materials. Most of the molded materials are materials with a certain cross-sectional shape. Dispersion and cell structure problems, industrial production is more difficult

Method used

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  • Polypropylene foaming masterbatch and production method thereof
  • Polypropylene foaming masterbatch and production method thereof
  • Polypropylene foaming masterbatch and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Raw material formula:

[0033] 45 parts of polyethylene, 20 parts of foaming agent azodicarbonamide, 30 parts of nano-montmorillonite, 3 parts of glyceryl monostearate, 1.5 parts of zinc stearate, and 0.5 parts of polydimethylsiloxane.

[0034] preparation:

[0035] 1. Mix the foaming agent azodicarbonamide, glyceryl monostearate, zinc stearate and polydimethylsiloxane in a high-speed mixer for 10-15 minutes at a material temperature of 60-80°C to obtain Activated blowing agent;

[0036] 2. Mix polyethylene, nano-montmorillonite and activated foaming agent in a high-speed mixer for 5-8 minutes, and then extrude and granulate through an extruder to obtain a foaming masterbatch. The parameters of the extruder during extrusion and granulation are temperature 100-200°C, screw speed 200-400r / min, and feeding speed 30-60r / min.

[0037] The homopolypropylene and the foaming masterbatch prepared in this example were mixed in a high-speed mixer at a mass ratio of 97:3 for 3-5...

Embodiment 2

[0040] The preparation method of this example is the same as that of Example 1, except that the copolymerized polypropylene and the foaming masterbatch prepared in this example are mixed in a high-speed mixer at a mass ratio of 97:3 when preparing the polypropylene microfoaming material for 3 -5 minutes, then injection molding to obtain polypropylene micro-foaming material.

[0041] The photo of the cross-sectional cell structure of the polypropylene microfoam material prepared in this embodiment is shown in figure 2 . The tensile strength is 28.1MPa, the bending strength is 34.4MPa, and the impact strength is 48.5kJ / m 2 , the cell diameter is small and evenly distributed, and the density of the micro-foamed polypropylene composite material is 0.80g / cm 3 .

Embodiment 3

[0043] Raw material formula:

[0044] 40 parts of polyethylene, 25 parts of foaming agent azodicarbonamide, 30 parts of nano-montmorillonite, 2 parts of glyceryl monostearate, 1.5 parts of zinc stearate, 0.5 parts of polydimethylsiloxane, uniform Foam agent 1 part.

[0045] preparation:

[0046] 1. Mix the foaming agent azodicarbonamide, glyceryl monostearate, zinc stearate, polydimethylsiloxane and foam stabilizer in a high-speed mixer for 10-15 minutes, and the material temperature is 60- 80°C to get activated foaming agent;

[0047] 2. Mix polyethylene, nano-montmorillonite and activated foaming agent in a high-speed mixer for 5-8 minutes, and then extrude and granulate through an extruder to obtain a foaming masterbatch. The parameters of the extruder during extrusion and granulation are temperature 100-200°C, screw speed 200-400r / min, and feeding speed 30-60r / min.

[0048] The homopolypropylene and the foaming masterbatch prepared in this example were mixed in a high-sp...

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Abstract

The invention discloses polypropylene foaming masterbatch and a production method thereof. The polypropylene foaming masterbatch is made by using polyethylene resin as substrate, adding azodicarbonamide, nano-montmorillonite, glycerin monostearate, zinc stearate, polydimethylsiloxane and foam stabilizer, mixing, extruding and granulating. The polypropylene foaming masterbatch is simple in production process and low in cost. When serving as polypropylene micro-foaming material in preparation, additive amount of the polypropylene foaming masterbatch in resin is little, so that the defect that producing the micro-foaming material by supercritical process is high in input cost, high in production equipment complexity and high in process requirement is overcome.

Description

1. Technical field [0001] The invention relates to a foaming masterbatch and a preparation method thereof, in particular to a polypropylene foaming masterbatch and a preparation method thereof. 2. Background technology [0002] The development of modern science and technology requires polymer materials to have more diverse and better comprehensive properties. Since the American scientist Professor Martini proposed the concept of microcellular foam polymer in the 1980s, the development of polymers has emerged in a new direction—introducing a large amount of foam into the polymer material through physical or chemical means. Micro-bubbles combine the properties of polymers with those of small bubbles to significantly improve material performance or endow new properties that the original polymer does not have. This has become one of the important directions for the development and application of polymer materials. [0003] The main technologies for developing microporous polyme...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08K3/34C08K9/04C08K9/06C08J3/22C08J9/16C08L23/12C08L23/14C08J9/10
Inventor 徐卫兵陈俊伟王雷周正发任凤梅
Owner HEFEI UNIV OF TECH
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