Extrusion foaming polypropylene particles with lower thermal molding pressure and preparation method thereof

A technology for extruding foam and polypropylene, applied in the field of polymer foam material production, can solve the problems of inapplicability, complex production process, and impact on the service life of products, and achieve high mechanical strength and thermal deformation temperature, high production The effect of efficiency

Inactive Publication Date: 2013-04-24
CGN JUNER NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of using organic peroxide to treat the surface of foam beads will leave peroxide and its decomposition products in the foamed products, so it cannot be applied to areas with hygiene requirements in contact with food; and peroxide and its decomposition products It has an impact on the service life of the product; in addition, the production process is relatively complicated, and it is difficult to achieve in the process of extrusion foaming

Method used

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  • Extrusion foaming polypropylene particles with lower thermal molding pressure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 4 kilograms of β-nucleating agent masterbatch, 66.4 kilograms of high melt strength polypropylene (RS1684, Basell Company), 30 kilograms of linear isotactic polypropylene (F401, Liaoning Huajin Company), 0.1 kilogram of antioxidant 168, 0.2 kilogram Antioxidant 1010, after mixing evenly, put it into the extruder to extrude and foam. The material can be continuously added according to the above raw material ratio for continuous production. The extrusion speed of the material is controlled at 40 kg per hour, and the supercritical carbon dioxide The injection speed was controlled at 3 kg per hour, the head pressure was 17 MPa, the head temperature was 160°C, and the water temperature of the underwater pelletizer was controlled at 60°C to obtain expanded polypropylene beads with an expansion ratio of 30 times.

[0046] The obtained foamed polypropylene beads are put into a thermoforming machine for molding, the steam pressure is 0.4 MPa (welding temperature is 144° C.), the ...

Embodiment 2

[0048] 6 kilograms of β-nucleating agent masterbatch, 44.6 kilograms of high melt strength polypropylene (RS1684, Basell Company), 50 kilograms of linear isotactic polypropylene (F401, Liaoning Huajin Company), 0.1 kilogram of antioxidant 168, 0.2 kilogram Antioxidant 1010, after mixing evenly, put it into the extruder to extrude and foam. The material can be continuously added according to the above raw material ratio for continuous production. The extrusion speed of the material is controlled at 40 kg per hour, and the supercritical carbon dioxide The injection speed was controlled at 2.8 kg per hour, the head pressure was 14MPa, the head temperature was 170°C, and the water temperature of the underwater pelletizer was controlled at 40°C to obtain expanded polypropylene beads with an expansion ratio of 23 times.

[0049] The obtained foamed polypropylene beads are put into a thermoforming machine for molding, the steam pressure is 0.45 MPa (welding temperature is 148° C.), th...

Embodiment 3

[0051] 4 kilograms of β-nucleating agent masterbatch, 66.4 kilograms of high melt strength polypropylene (RS1684, Basell Company), 30 kilograms of linear isotactic polypropylene (F401, Liaoning Huajin Company), 0.1 kilogram of antioxidant 168, 0.2 kilogram Antioxidant 1010, 1 kg of calcium stearate, after mixing evenly, put it into the extruder to extrude and foam. The materials can be added continuously according to the ratio of the above raw materials for continuous production. The extrusion speed of the materials is controlled at an hourly extrusion rate 40 kg, the injection speed of supercritical carbon dioxide is controlled at 2.8 kg per hour, the head pressure is 15MPa, the head temperature is 150°C, and the water temperature of the underwater pelletizer is controlled at 60°C to obtain expanded polypropylene with a foaming ratio of 24 times beads.

[0052] The obtained foamed polypropylene beads are put into a thermoforming machine for molding, the steam pressure is 0.45...

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Abstract

The invention discloses extrusion foaming polypropylene particles with lower thermal molding pressure, which comprise the following components in part by weight: 100 parts of polypropylene, 0.02-0.6 part of beta nucleating agent, 0-0.6 part of antioxidant, 0-2 parts of lubricating agent, 0-3 parts of foaming nucleating agent and 0-2 parts of coloring agent. The polypropylene is high-melt-strengthpolypropylene and linear isotactic polypropylene. The invention further discloses a preparation method for the extrusion foaming polypropylene particles. The method is simple to operate, can be applied to continuous production, and is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of production of polymer foaming materials, in particular to an extruded foamed polypropylene bead with relatively low thermoforming pressure and a preparation method thereof. Background technique [0002] Foam plastic has the advantages of light weight, heat insulation, sound insulation, cushioning, high specific strength, and low price, so it is widely used in the fields of packaging, industry, agriculture, transportation, military industry, aerospace industry, and daily necessities. Commonly used foams include expanded polystyrene (PS), expanded polyethylene (PE), expanded polypropylene (PP) and expanded polyurethane (PU). [0003] Compared with traditional foamed PS and foamed PE, foamed PP has many unique advantages: (1) Excellent heat resistance, foamed PS is usually used at 80°C, foamed PE can only withstand 70-80°C , while the foamed PP can withstand 120°C and can be used for a long time in a high t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08K13/02C08J9/12B29C47/92B29B9/06C08J3/22B29C48/92
CPCB29C48/04B29C48/92B29C2948/92514B29C2948/92704B29C2948/92895
Inventor 卢军黄志杰祖勇
Owner CGN JUNER NEW MATERIALS
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