Material that never melts – new polyester molding compound

1757
  • Nonflammable & resistance to electric sparks
  • Almost no deflection or shrinkage at 250?
  • Processing: runnerless molding

Vyloglass is a new type of thermosetting dry-type polyester molding compound developed by using a unique technology of Japan U-PICA Company Ltd. The material, distributed by Mitsubishi Gas Chemical America, Inc., features very good heat resistance and electrical properties compared with conventional thermosetting dry-type polyester molding compounds.

Nonflammable and resistance to electric sparks

Vyloglass is nonflammable. It uses no halogen compounds like chlorine and bromine as flame retardants while maintaining a very high safety level and achieving a UL-94 class V-0 flame retardance rating. The material also features resistance to electric sparks and tracking (more than 900 V) and arcing (197 seconds specified in the UL Yellow Card).

Relations of Arc resistance and tracking resistance for each material.

Relations of Arc resistance and tracking resistance for each material.

The material that never melts

The material also offers very good heat resistance (UL Thermal Ind. of 180 ? C being applied), and never melts even at extraordinarily high temperatures. Vyloglass deflects and shrinks only slightly even when being exposed to intense heat at 250? or more, providing very good dimensional stability at high temperatures.

Burning test based on UL94 5V

Burning test based on UL94 5V

Runnerless molding of Vyloglass

The technique most suitable to process the material is runnerless molding. Though there have been a number of books on runner less molds for thermosetting molding compounds, the very fact is that the runnerless molding is seldom used.

 An Example of a Runnerless Mold

An example of a runnerless mold

Molded products become increasingly smaller and thinner. In conventional molds, however, sprues and runners are too thick to mold such thin parts. Removing sprues and runners will help reduce the molding cycle, which cannot be readily applied to compounds diallylphthalate. Of all dry-type premixes, Vyloglass can be applied to the runnerless molding most easily due to its very good heat stability inside the injection cylinder and lower viscosity. According to the company, one specific Japanese manufacturer have put mini-runners into practical use as modular molds, and Vyloglass is highly rated as the most suitable material for this modular system.

List of comparison of Vyloglass and PPS

List of comparison of Vyloglass and PPS

List of comparison of Vyloglass (VG-2200, VG-7100) and PPS

List of comparison of Vyloglass (VG-2200, VG-7100) and PPS

Applications

The material is very suitable for applications in electrical equipment, and electronic, automotive, heat-resistant and mechanical parts that require high thermal resistance, electrical properties and nonflammability.

vyloglas_application_samples

Sample parts made from Vyloglass molding compound

·


Related Articles & Comments

Comments are closed.