Nanjing Chemical Material Corp.
Service
Products

Six Characteristics of Expandable Microspheres Shoes Six Characteristics of Expandable Microspheres Shoes

Table of Content [Hide]

    Expandable microspheres shoes are thermoplastic hollow polymer microspheres composed of a thermoplastic polymer shell and a sealed liquid paraffin gas. The average diameter of these  hollow polymer microspheres ranges from 10 to 50 µm, and their true density ranges from 1000 to 1300kg/m3. When heated, the gas pressure in the shell increases and the thermoplastic shell softens, which results in a significant increase in the volume of the expandable microspheres shoes. When cooled, the expanded shell of the expandable microspheres shoes hardens again and the volume will be fixed.


    Expandable microspheres shoes have the following characteristics:


    1. Expansiveness

    The expansion process of expandable microspheres shoes is a delicate balance among the shell softening, air impermeability, external pressure and the increase of the gas pressure inside the microspheres. This balance is influenced by the polymer composition of the expandable microspheres shoes shell, the type of gas inside the expandable microspheres shoes, the chemicals the shell comes into contact with, external pressure, the type of expansion, the type of base materials and the heating rate.


    2. Thermal stability

    The stability of different types of expandable microspheres shoes is obviously different. Different types of expandable microspheres shoes have different thermo-mechanical properties and are suitable for different processes and applications.


    3. The particle size

    The physical expandable microspheres shoes are very small and the particle size before expansion is usually between 10-50 microns.


    4. Solvent resistance

    In practical applications, physical expandable microspheres shoes may come into contact with a variety of chemical solvents, and each kind of solvent has different effects on the expandable microspheres shoes, so specific analysis and test are required. The following conditions may occur: swelling, discoloration, foaming rate change, etc..


    5. Elasticity
    Most types of expandable microspheres shoes have good elasticity. The expanded microspheres tend to be compressed easily, and when the pressure is released, most of the expanded microspheres will return to their original volume. Because of the elasticity, expandable microspheres shoes are able to withstand multiple pressuring/pressure release without rupture.

    6. Air impermeability
    The polymer shell formulation of expandable microspheres shoes has been accurately designed and has relatively low permeability, which can effectively prevent the expandable microspheres shoes from leaking gas into the matrix. Gas leakage into the matrix can cause pinhole and density increase. Different types of expandable microspheres shoes have different air impermeability.

    References
    Related News
    • What Are the Advantages of DMC Catalyst?

      What Are the Advantages of DMC Catalyst?

      April 21, 2020DMC catalyst is a new type of high-performance catalytic olefin oxide ring-opening polymerization catalyst, suitable for synthesis of olefin oxide polyether containing 1-6 functional groups. DMC catal...view
    • China Expandable Microspheres—A Multifunctional New Foaming Agent

      China Expandable Microspheres—A Multifunctional New Foaming Agent

      August 22, 2024China Expandable Microspheres Expansion PrincipleChina expandable microsphere's Full name is thermoplastic expandable microspheres. These are thermally expandable micro capsules with a core-shell ...view
    • Applications of N-Vinyl-2-pyrrolidone

      Applications of N-Vinyl-2-pyrrolidone

      September 23, 2021N-Vinyl-2-pyrrolidone has various applications, the following are the three main application directions.N-Vinyl-2-pyrrolidone can be used in plastics. The monomer can be added to the formulation of UV...view
    • Lubricant Additive

      Lubricant Additive

      October 13, 2021The concept of a lubricant additive is the addition of one or more compounds to a lubricant in order to give the lubricant some new properties or improve some existing properties of the lubricant. Add...view
    • Live Up to the Spring and Steadily Progress丨2023 NCMC Annual Meeting Successfully Held!

      Live Up to the Spring and Steadily Progress丨2023 NCMC Annual Meeting Successfully Held!

      July 29, 2024Stay true to the mission and pursue our dream.In the beginning of 2024, NCMC held its annual meeting and celebration as scheduled, all NCMCer gathered together to look back on 2023 and look forward to...view
    • Glycolic Acid for Skin Care

      Glycolic Acid for Skin Care

      March 22, 2022Glycolic acid cosmetics can effectively penetrate the skin, stimulate collagen synthesis and cellular activity. Due to this powerful skin layer penetration, glycolic acid enhances the efficacy of othe...view
    • TEL:+86-25-52337978
    • EMAIL: info@njchm.com
    • ADDRESS:12/F, Block B, Technology and Innovation Building, Nanjing University of Technology, No.5 New Model Road, Nanjing 210009, China