Needle-punched non-woven fabric can serve as an insulating layer within a mattress due to its composition and structure. Insulation and temperature regulation are achieved through a combination of the fabric's properties:

    Air Trapping: Needle-punched non-woven fabric is created by mechanically interlocking fibers. This process creates a three-dimensional network of fibers with open spaces or pockets between them. These pockets trap air within the fabric, creating a layer of still air that acts as an insulating barrier. Air is a poor conductor of heat, so the trapped air helps prevent heat transfer between the sleeper's body and the mattress core.

    Thermal Resistance: The interlocking structure of the fabric's fibers, combined with the trapped air, results in higher thermal resistance. This means that it resists the flow of heat. As a result, the fabric helps to maintain a more stable temperature within the mattress, reducing the exchange of heat between the sleeper and the mattress materials.

    Temperature Regulation: The insulating properties of needle-punched non-woven fabric help regulate temperature within the mattress. In colder environments, the fabric helps to retain body heat, creating a warmer and cozier sleeping surface. In warmer environments, it acts as a barrier, reducing heat transfer and preventing the mattress from becoming excessively hot.

    Moisture Control: The trapped air within the fabric also contributes to moisture control. It can help prevent the accumulation of moisture by allowing some air circulation and evaporation. This can be particularly important for maintaining comfort and hygiene within the mattress.

    Barrier from Core Materials: Needle-punched non-woven fabric can act as a barrier between the sleeper and the mattress core materials, which can include foam, springs, and other components. This prevents direct contact with potentially cooler or warmer materials, helping to moderate the temperature experienced by the sleeper.

Overall, the combination of air-trapping pockets and thermal resistance in needle-punched non-woven fabric makes it an effective insulating layer within mattresses. It contributes to maintaining a more comfortable sleep environment by reducing temperature fluctuations and enhancing moisture control.