Porous Polyester Fiber: The “porous” life of a fiber

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Porous Polyester Fiber offers high breathability, lightweight strength, and thermal insulation—ideal for filtration, acoustics, and eco-friendly applications.


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Welcome to the “Internet celebrity” in the fiber industry – Porous Polyester Fiber. It is not as sticky as wool, nor as soft as cotton, but with the magical setting of “porous and breathable”, it has successfully become popular in major industries such as filtration, heat preservation, and sound absorption.

It is not just a fiber, it is an attitude – “I have holes, I am proud.”

Parameter Technical Range Description
Fiber Diameter 1.0 μm – 20 μm Customizable micro-scale fiber sizes
Pore Size 0.5 μm – 100 μm Uniform porous structure for fine filtration
Porosity 60% – 90% High air permeability with stable structure
Density 0.10 – 0.35 g/cm³ Lightweight and suitable for composites
Tensile Strength ≥ 3.5 MPa Strong mechanical durability
Air Permeability 200 – 1500 L/m²·s (at 25Pa) Excellent for air filtration applications
Thermal Conductivity ≤ 0.035 W/m·K Effective insulation performance
Temperature Resistance -40°C to +180°C Stable under extreme temperature conditions
Noise Reduction Coefficient (NRC) 0.6 – 0.9 (depends on thickness) Ideal for acoustic absorption and insulation
Environmental Compliance RoHS, REACH, Recyclable Eco-friendly and sustainable material

What is Porous Polyester Fiber? Why is it so “porous”?

Porous Polyester Fiber simply means “punching holes” in polyester fibers – the microstructure is full of small holes. These holes are not decorations, but the core of black technology with amazing functionality.

This type of fiber is manufactured through a special process, which can form hundreds of micropores inside each fiber as thin as a hair. These holes give it amazing breathability, adsorption, heat insulation and processability. In the field of functional materials, its status is like SpongeBob in the animation industry, which can both punch and absorb.

The advantages of Porous Polyester Fiber

1. It is breathable but not windproof, and it is a material that can really “breathe”

Don’t get me wrong, Porous Polyester Fiber is not broken, but scientifically “opened”. These micropores allow air to pass freely, but are selective for liquids and particles, and the filtering effect is comparable to the “cousins” of filtering machines. It is widely used in air purification, filter cotton, mask cloth, industrial dust removal and other fields.

2. Porous Polyester Fiber absorbs sound and keeps warm, and it knows “isolation” better than your quilt

The porous structure brings excellent sound absorption ability. Tests show that at the same thickness, it is several times more efficient than ordinary polyester fiber in sound absorption. Not only that, these fine holes can also prevent heat from escaping, making it an excellent choice for thermal insulation cotton, wall filling, and building energy-saving materials.

3. Lightweight and high-strength, Porous Polyester Fiber is a “low-key capable person”

Don’t be fooled by its lightweight appearance. This fiber is not only light, but also has excellent tensile strength and durability. It is not afraid of pressure or blisters, suitable for long-term use, and is an ideal “skeleton” for various composite materials and environmentally friendly new materials.

Uses span all corners of the world, wherever it is needed

Porous Polyester Fiber is an environmentally friendly filtration expert

Whether it is industrial dust filtration, water treatment, air purification, or medical filtration media, porous polyester fiber can become the “strongest scavenger” with its high porosity and good interception ability.

Building materials industry: the invisible champion of sound insulation and heat preservation

It often appears in places you can’t see, such as under the floor, wall interlayer, and between air-conditioning channels. It is quiet and has been quietly “absorbing sound”, isolating the outside horn sound and dog barking sound from the invisible.

Automotive industry: “Weight loss expert”

In automotive interiors, sound insulation cotton, and filtration systems, it has become a favorite of engineers – lightweight, powerful, and fuel-efficient, it can be said to be a three-win player.

Why do we choose Porous Polyester Fiber?

Because Porous Polyester Fiber is not squeamish, not picky about the environment, resistant to high temperature, aging, corrosion, and can be recycled. More importantly, it is a model of the rise of domestic technology, with stable supply, support for customization, and can also design pore size, fiber diameter, gram weight, and strength on demand, fully meeting the customized needs of different processes.

Porous Polyester Fiber, experience a multifaceted life

In this era of looking at faces, Porous Polyester Fiber relies on “inner holes” to win respect. It does not sensationalize or pursue traffic, but always shines silently behind the scenes of material science, contributing the wisdom and power of a fiber.

If you are looking for a durable, environmentally friendly, and powerful material partner, then Porous Polyester Fiber is not only worth knowing, but also worth having.


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