Thermoplastic polyurethane elastomer foamed bead and preparation method thereof

A technology of thermoplastic polyurethane and foaming beads, which is applied in the field of foaming materials, can solve the problems of insufficient cell density, difficulty in achieving, and poor elasticity, and achieve uniform cell density, easy foaming density, and high closed cell rate. Effect

Active Publication Date: 2015-09-02
丁钰
View PDF7 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] CN 103642200A discloses a foamed thermoplastic polyurethane bead, which contains 100 parts of thermoplastic polyurethane particles, 1-10 parts of cell size stabilizer, and 1-35 parts of melt viscosity modifier; the foamed thermoplastic polyurethane The melt viscosity of beads at 180°C is 8000-15000 poise; the cell diameter of beads is 500-800 microns, it is difficult to reach below 300 microns, the cells are not dense enough, poor in elasticity and low in strength

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Thermoplastic polyurethane elastomer foamed bead and preparation method thereof
  • Thermoplastic polyurethane elastomer foamed bead and preparation method thereof
  • Thermoplastic polyurethane elastomer foamed bead and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The thermoplastic polyurethane elastomer foaming beads are mainly prepared from the following raw materials in parts by weight:

[0048]

[0049] The clay has an average particle size of 1 μm.

[0050] The preparation method of the thermoplastic polyurethane elastomer expanded beads is as follows:

[0051] (1) heat-treating the above-mentioned polyester thermoplastic polyurethane elastomer at 45° C. for 8 hours;

[0052] (2) adding dicumyl peroxide, pottery clay, HS-944 and polyethylene wax to the polyester thermoplastic polyurethane elastomer after the heat treatment and the formula amount to fully mix in the mixer to obtain the mixture;

[0053] (3) Put the mixture into a twin-screw extruder with a length-to-diameter ratio of 55 through the feeding port. The melt temperature of the twin-screw extruder is set at 150°C. The blowing agent of the formulation amount injected at the place is mixed and extruded through a circular orifice die with a diameter of 2.5mm. Th...

Embodiment 2

[0057] The thermoplastic polyurethane elastomer foaming beads are mainly prepared from the following raw materials in parts by weight:

[0058]

[0059] The average particle size of the calcium carbonate is 50 μm.

[0060] The preparation method of the thermoplastic polyurethane elastomer expanded beads is as follows:

[0061] (1) heat-treating the polyether thermoplastic polyurethane elastomer of the above formula amount at 110° C. for 5 hours;

[0062] (2) Add the heat-treated polyether thermoplastic polyurethane elastomer and the formula amount of bis(2,4-dichlorobenzoyl peroxide), calcium carbonate, BW-10LD and monoglyceride into the mixer and mix thoroughly , to get the mixture;

[0063] (3) Put the mixture into a twin-screw extruder with a length-to-diameter ratio of 50 through the feeding port. The melt temperature of the twin-screw extruder is set at 195°C. The blowing agent of the formulation amount injected at the place is mixed and extruded through a circular ...

Embodiment 3

[0067] Thermoplastic polyurethane elastomer foam beads include the following raw materials by weight percentage:

[0068]

[0069] The average particle diameters of the calcium carbonate and magnesium hydroxide are both 25 μm.

[0070] The preparation method of the thermoplastic polyurethane elastomer expanded beads is as follows:

[0071] (1) heat-treating the polyether thermoplastic polyurethane elastomer of the above formula amount at 90° C. for 1 hour;

[0072] (2) The heat-treated polyether thermoplastic polyurethane elastomer and the formula amount of toluene diisocyanate, a mixture of monoglyceride and tristearin, a mixture of calcium carbonate and magnesium hydroxide, and BW-10LD and HS-950 The mixture is added into the mixer and fully mixed to obtain a mixture;

[0073] (3) Put the mixture into a twin-screw extruder with a length-to-diameter ratio of 50 through the feeding port. The melt temperature of the twin-screw extruder is set at 170°C. The blowing agent o...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
diameteraaaaaaaaaa
melt viscosityaaaaaaaaaa
Login to view more

Abstract

The invention provides a thermoplastic polyurethane elastomer foamed bead and a preparation method thereof. The thermoplastic polyurethane elastomer foamed bead is mainly prepared from the following raw materials in parts by weight: 60-94 parts of thermoplastic polyurethane elastomer, 2-20 parts of foaming agent, 0.5-3 parts of crosslinking agent, 0.5-5 parts of nucleator, 2-10 parts of filler and 1-2 parts of light stabilizer. The thermoplastic polyurethane elastomer foamed bead has the advantages of uniform particle size, high closed-cell rate, uniform pores and high strength. The preparation method is simple, has the advantages of fewer production steps, low required equipment investment, safe and environment-friendly production process and controllable foaming density, and is suitable for all thermoplastic polyurethane elastomers.

Description

technical field [0001] The invention belongs to the technical field of foaming materials, and in particular relates to a thermoplastic polyurethane elastomer foaming bead and a preparation method thereof. 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. 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 products are difficult to degrade and are prone to "white pollution". The United Nations Environment Organizatio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08L75/08C08L23/06C08K13/02C08K5/14C08K5/29C08K3/34C08K3/26C08K5/103C08K3/22C08J9/30C08J9/14
Inventor 丁钰
Owner 丁钰
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap