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Is meltblown non-woven fabric a good insulation material? 2020-09-08

Meltblown non-woven fabric has a very wide range of applications in heat preservation and is a good heat preservation material. Next, let's talk about the application of meltblown non-woven fabrics in heat preservation:

Meltblown nonwovens have the characteristics of large specific surface area, small voids (pore size ≤20μm), and high porosity (≥75%). For example, the specific surface area of meltblown nonwoven fabric with an average diameter of 3μm [equivalent to an average fiber linear density of 0.0638dtex (fineness of 0.058 denier)] is 14617cm2/g, and an average diameter of 15.3μm [equivalent to an average fiber line The specific surface area of the spunbonded nonwoven fiber with a density of 1.65 dtex (with a fineness of 1.5)] is only 2883 cm2/g.

Since the thermal conductivity of air is much smaller than that of ordinary fibers, the air in the pores of the melt-blown non-woven fabric makes the thermal conductivity smaller, and the heat loss through the fiber material of the melt-blown non-woven fabric is very small, and there are countless super The static air layer on the surface of the fine fiber prevents heat exchange due to the flow of air, so that it has a good heat insulation and warmth preservation effect.

Polypropylene (PP) fiber is a variety of existing fiber materials with very low thermal conductivity. The specially treated meltblown thermal insulation flake made of PP fiber has a thermal insulation performance of 1.5 times that of down and 15 times that of ordinary thermal insulation. Especially suitable for making ski suits, mountaineering suits, bedding, sleeping bags, thermal underwear, gloves, shoes, etc. Products with a basis weight of 65-200g/m2 have been used to make warm clothing for soldiers in cold regions.

In addition to the application of heat preservation, meltblown non-woven fabrics also have very important applications in filter materials and oil absorption.

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