Nanjing Chemical Material Corp.
Service

Application of Expandable Microspheres Application of Expandable Microspheres

Expanded microspheres (also known as foamed microspheres) are high molecular polymers. Its outer shell is made of a high molecular polymer (acrylic eye copolymer) which is a hydrocarbon inside. In the case of heat (100-150 ° C), the outer shell softens and the hydrocarbons are vaporized by the liquid, thereby expanding the outer casing and changing the outer casing.

When the microspheres are heated to the glass transition temperature of the thermoplastic polymer material constituting the casing, the casing is softened and has plasticity. Since the low-boiling core material in the microsphere is heated to generate pressure, the expansion of the microsphere shell is caused. At the time of expansion, the pressure generated by the core material is balanced with the tension of the resin wall material due to stretching. In a certain temperature range, the higher the temperature, the greater the pressure generated by the core material, and the resin wall material will continue to stretch in order to balance the pressure, so that the microspheres continue to expand and maintain the balloon shape (stabilized foam) at a certain temperature. Even when the temperature is lowered, the microspheres can maintain their original state due to the hardening of the outer casing.

If heating continues, the casing continues to expand causing the shell wall to continue to thin. When the shell wall tension is insufficient to counteract the gas pressure, the gas diffuses through the shell wall to the outside of the casing, causing the internal pressure to rapidly decrease, thereby causing the microcapsules to retract.

Expandable microspheres are used as lightweight fillers and blowing agents to make the final product lighter, achieve different surface finishes, and reduce costs by reducing the need for raw materials. It is a very versatile product that offers advantages such as low density or better insulation, including in architectural and automotive applications.
Related News
  • Green City, Green Development

    Green City, Green Development

    January 29, 2019June 5th, 2018On the 47th World Environment Day, June 5 th, a large public service activity, "Green City, Green Development" is held in the square of Nanjing Dujiang Victory War Memorial Hall. The the...view
  • 2018 Asia Petrochemical Industry Conference

    2018 Asia Petrochemical Industry Conference

    January 29, 2019August 20-21, 2018 Kuala Lumpur Convention Center MalaysiaAPIC 2018 (Asia Petrochemical Industry Conference, APIC) is making a return to the vibrant city of Kuala Lumpur, Malaysia from 20 - 21 August...view
  • Market Application Direction of Glycolic Acid

    Market Application Direction of Glycolic Acid

    March 13, 20191.Chemical cleaningAs an organic acid, glycolic acid has a good cleaning function for certain metal scales. Since glycolic acid does not contain chloride ions, it is extremely corrosive to equipment m...view
  • 79th API China

    79th API China

    January 31, 2018November 15-17, 2017Xiamen International Convention and Exhibition CenterAPI China is China's leading exhibition for the pharmaceutical manufacturing sector covering the complete spectrum of products ...view
  • 2017 Oleon Distributor Meeting

    2017 Oleon Distributor Meeting

    January 31, 2018Date:2017/11/02-11/04Place: Siem Reap, Cambodia Thanks for the invitation from Oleon, this is the third year for NCMC to attend Oleon’s AP& ME distributor meeting. Members from Oleon Belgium base, to...view
  • Preparation of Ethyl Iodide

    Preparation of Ethyl Iodide

    April 29, 2019Preparation of ethyl iodideFirst, the principle:Ethyl iodide is usually reacted with ethanol, iodine and red phosphorus, but the reaction is slow, and it needs to be heated in a reflux device for seve...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