Extruded foaming thermoplastic polyurethane elastomer particles and preparation method thereof

A thermoplastic polyurethane, extrusion foaming technology, applied in the field of foaming materials, can solve the problems of high cost and complicated foaming process, and achieve the effect of simple operation and uniform density distribution

Active Publication Date: 2014-05-21
MIRACLL CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The intermittent autoclave foaming process is complicated and costly

Method used

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  • Extruded foaming thermoplastic polyurethane elastomer particles and preparation method thereof
  • Extruded foaming thermoplastic polyurethane elastomer particles and preparation method thereof
  • Extruded foaming thermoplastic polyurethane elastomer particles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Mix 100 parts of thermoplastic polyurethane (TPU) particles A shown in Table 1, 0.2 parts by weight of talc, and 0.05 parts by weight of antioxidant 1010, and then put the above mixture into an extruder to granulate to obtain particles suitable for foaming Raw materials, and finally put the above-mentioned raw materials into a single-stage single-screw extruder. The extrusion speed of the material is controlled at 55 kg per hour, the speed of injecting n-butane into the extruder is controlled at 5 kg per hour, the die head pressure is 13Mpa, the die head temperature is 172°C, and the water temperature of the underwater pelletizer Controlled at 70°C. Materials can be added continuously according to the above component ratios for continuous production, and the foaming density of the obtained particles is 0.215g / cm 3 .

Embodiment 2

[0040] Mix 100 parts of thermoplastic polyurethane (TPU) particles A shown in Table 1, 0.3 parts by weight of silicon dioxide, and 0.07 parts by weight of antioxidant 245, and then put the above mixture into an extruder for granulation to obtain a compound suitable for foaming. The granular raw materials, and finally put the above raw materials into a single-stage single-screw extruder. The extrusion speed of the material is controlled at 55 kg per hour, the speed of injecting propane into the extruder is controlled at 7 kg per hour, the die head pressure is 15Mpa, the die head temperature is 168°C, and the water temperature of the underwater pelletizer is controlled at 55°C. The material can be added continuously according to the above-mentioned component ratio for continuous production, and the foaming density of the obtained particles is 0.202g / cm 3 .

Embodiment 3

[0042] Mix 100 parts of thermoplastic polyurethane (TPU) particles B shown in Table 1, 0.1 parts by weight of calcium carbonate, and 0.1 parts by weight of antioxidant 1010, and then put the mixture into an extruder to granulate to obtain a foamable Granular raw materials, and finally put the above raw materials into the co-rotating twin-screw extruder. The extrusion speed of the material is controlled at 40 kg per hour, the speed of injecting n-pentane into the extruder is controlled at 7 kg per hour, the die head pressure is 16Mpa, the die head temperature is 183°C, and the water temperature of the underwater pelletizer Controlled at 70°C. Materials can be added continuously according to the above component ratios for continuous production, and the foaming density of the obtained particles is 0.152g / cm 3 .

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Abstract

The invention relates to extruded foaming thermoplastic polyurethane elastomer particles and a preparation method thereof. The particles comprise the following components in parts by weight: 100 parts of thermoplastic polyurethane elastomer, 0.01-0.5 part of foaming nucleating agent, and 0.01-0.2 part of antioxidant. The preparation method comprises steps of firstly, mixing the materials, then throwing the mixture into an extruder to prill to obtain a bead raw material suitable for foaming, finally, throwing the beads into a special extruder for foaming, and after foaming by an opening die, pelletizing underwater so as to prepare the particles. The thermoplastic polyurethane foaming particles are prepared through an extrusion method; by controlling the foaming technology conditions, the foaming particles are controllable in density and have uniform cell density; the whole production method is simple to operate, has no special limitation and requirement on the equipment, and is applicable to industrial continuous production.

Description

technical field [0001] The invention relates to extruded foamed thermoplastic polyurethane elastomer particles and a preparation method thereof, belonging to the field of foamed materials. Background technique [0002] Using plastic as a matrix, a large number of air bubbles are filled inside the plastic by physical or chemical methods to obtain a polymer foam material. Foam materials have a series of advantages such as low density, heat and sound insulation, high specific strength, and cushioning, so they are widely used in the fields of packaging, industry, agriculture, transportation, military industry, aerospace industry, and daily necessities. Commonly used types of foam are polyurethane (PU) soft and rigid foam, polystyrene (PS) foam, polyethylene (PE) foam, polypropylene (PP) foam, etc. However, isocyanate is likely to remain in the foaming process of polyurethane foam, which is harmful to the human body, and the foamed material cannot be recycled. Polystyrene foam ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08J9/16B29C47/92B29B9/06B29C48/04B29C48/92
CPCB29B7/46B29B7/72B29B7/7461B29B9/12C08J9/16C08L75/04C08J9/0014C08J9/0023C08J9/0028C08J9/0038C08J9/0066C08J9/0095C08J9/141C08J2201/03C08J2203/14C08J2300/22C08J2300/26C08J2375/04B29C48/04B29C48/92B29C2948/926B29C2948/92514B29C2948/92685B29C2948/92704B29C2948/92885B29C2948/92895B29C2948/92923B29C2948/92971B29B9/065B29B9/06B29C44/3461C08G2110/0058C08G2110/0066B29K2075/00C08G18/14C08G18/3206C08G18/341C08G18/4854C08G18/6692C08G18/7671C08K3/26C08K3/346C08K3/36C08K3/38C08K5/134C08K2003/265C08K2003/387
Inventor 黄波王仁鸿王光阜张生赵玮
Owner MIRACLL CHEM
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