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Extrusion foaming polypropylene particles with lower thermal molding temperature 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: 2013-07-31
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 temperature and preparation method thereof
  • Extrusion foaming polypropylene particles with lower thermal molding temperature and preparation method thereof
  • Extrusion foaming polypropylene particles with lower thermal molding temperature and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 4 kg of β-nucleating agent masterbatch, 66.4 kg of high melt strength polypropylene (RS1684, Basell Company), 30 kg of block copolymer polypropylene (K8303, Yanshan Petrochemical Company), 0.1 kg of antioxidant 168, 0.2 kg of anti-oxidant Oxygen agent 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. The injection of supercritical carbon dioxide The speed is controlled to inject 3 kg per hour, the head pressure is 17MPa, the head temperature is 160°C, and the water temperature of the underwater pelletizer is controlled at 60°C to obtain expanded polypropylene beads with an expansion ratio of 30 times. The DSC curve of the expanded polypropylene beads is shown in figure 1 .

[0048] The obtained expanded polypropylene beads are put into a thermoforming machine for molding, ...

Embodiment 2

[0050] 6 kg of β-nucleating agent master batch, 44.6 kg of high melt strength polypropylene (RS1684, Basell Company), 50 kg of block copolymer polypropylene (K8303, Yanshan Petrochemical Company), 0.1 kg of antioxidant 168, 0.2 kg of anti-oxidant Oxygen agent 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. The injection of supercritical carbon dioxide The speed is controlled to inject 2.8 kg per hour, the head pressure is 14MPa, the head temperature is 170°C, and the water temperature of the underwater pelletizer is controlled at 40°C to obtain expanded polypropylene beads with an expansion ratio of 24 times.

[0051] The obtained foamed polypropylene beads are put into a thermoforming machine for molding, the steam pressure is 0.47 MPa (welding temperature is 150° C.), the surfa...

Embodiment 3

[0053] 4 kg of β-nucleating agent masterbatch, 66.4 kg of high melt strength polypropylene (RS1684, Basell Company), 30 kg of block copolymer polypropylene (K8303, Yanshan Petrochemical Company), 0.1 kg of antioxidant 168, 0.2 kg of anti-oxidant Oxygen agent 1010, 1 kilogram of calcium stearate, put into the extruder after mixing evenly and extrude foaming, can add material continuously according to the above-mentioned raw material ratio, carry out continuous production, and the extrusion speed of material is controlled at extruding 40 per hour 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 beads with an expansion ratio of 23 times grain.

[0054] The obtained foamed polypropylene beads are put into a thermoforming machine for molding, the steam pressure is 0.45 MPa (w...

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Abstract

The invention discloses extrusion foaming polypropylene particles with lower thermal molding temperature, which comprises 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, wherein the polypropylene is high-melt-strength polypropylene and co-polypropylene. The invention further discloses a preparation method for the extrusion foaming polypropylene particles. The method is simple to operate, can be appliedto 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 temperature 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 hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/14C08L53/00C08K13/02C08J9/12B29C47/92B29B9/06C08J3/22B29C48/92
CPCB29B9/12B29B9/065B29C48/04B29C48/92B29C2948/92514B29C2948/92704B29C2948/92904B29C2948/92923
Inventor 卢军黄志杰祖勇
Owner CGN JUNER NEW MATERIALS
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