Microfiber Polyester Felt

The material is made from 100% polyester fiber. Its porosity is 85%–95%, with higher-quality grades remaining at around 90%. The internal pore size is mainly 10–500 μm.

Air permeability is 150 ± 40 L/(100 cm²·min). Low-melting-point PET fibers are thermally bonded at 210–230°C, so no separate glue is required to hold the fiber structure together.

This process maintains the porous network while avoiding odor and VOC concerns that may be associated with added adhesives. The material has fine fibers, an even surface, no loose flying fiber, and no obvious itchy feeling.

It can be used for thin acoustic felt, precision equipment liners, and parts that require a relatively clean assembly environment.

For a 50 mm, 32 kg/m³ grade, the sound absorption coefficient is 0.25 at 125 Hz and 0.55 at 250 Hz.

It increases to 0.85 at 500 Hz, 0.95 at 1,000 Hz, 0.92 at 2,000 Hz, and 0.88 at 4,000 Hz. Between 500 and 4,000 Hz, the absorption coefficient remains within about 0.85–0.95.

This makes Microfiber Polyester Felt suitable for high-frequency electric-motor noise, household-appliance airflow noise, office-equipment operating sound, and medium- to high-frequency reflections in audiovisual rooms.

The felt can also be processed into functional liners with holes, grooves, shaped edges, or locally compressed sections.

Jiangsu Haokai has its own R&D team and coordinates product development through its R&D, production, quality, and project-management functions.

Material specifications can be selected according to the target frequency, installation thickness, and component design. The factory supports acoustic material production, precision die cutting, mold processing, and inspection coordination.

Custom parts can be made from technical drawings or physical prototypes. Custom sample development normally takes 10–15 days, and some components can be processed by laser cutting.

Sample confirmation and small-batch trials can be completed before volume production. Photos or videos can be shared during manufacturing. Products receive 100% inspection before packing, and customer-arranged third-party inspection is accepted.