Breathability and heat dissipation of knit mattress fabric

1. Breathability of knitted mattress fabric

1. Definition and importance of breathability
Breathability refers to the ability of fabric to allow air or water vapor to pass through, which is an important physical property of fabric. For mattress fabric, breathability is particularly important because it directly affects the air circulation and humidity regulation inside the mattress. A mattress fabric with good breathability can ensure that the inside of the mattress remains dry, reduce the feeling of moisture and stuffiness, and thus improve the quality of sleep.

2. Breathability advantage of knitted structure
Knitted fabric is a fabric made by one or several groups of yarns being interlaced on a knitting machine according to a certain pattern. Its unique coil structure forms many tiny channels inside the fabric, which allow air and water vapor to pass freely, thus giving the knitted fabric good breathability.

Openness of coil structure: The coil structure of knitted fabric is relatively open, not as tightly arranged as woven fabric, so air and water vapor can pass more easily.
Selection of yarn material: knit mattress fabric is usually made of natural fibers (such as cotton, linen) or synthetic fibers (such as polyester, nylon), which have certain air permeability. The air permeability of knitted fabrics can be further optimized through reasonable fiber ratio and yarn specification selection.
3. Air permeability test and evaluation criteria
The air permeability test is usually carried out using an air permeability tester, which evaluates the air permeability of the fabric by measuring the gas flow through the fabric per unit time under a certain pressure. For knitted mattress fabrics, the results of the air permeability test are usually expressed in terms of the amount of gas passing through the fabric per unit time (such as L/m²·s).

2. Heat dissipation of knitted mattress fabrics
1. Definition and importance of heat dissipation
Heat dissipation refers to the ability of fabrics to dissipate the heat generated by the human body in a timely manner. For mattress fabrics, good heat dissipation can ensure that the mattress maintains a suitable temperature during use and avoids discomfort caused by overheating.
2. Heat dissipation advantages of knitted structure
The coil structure of knitted fabrics not only gives it good air permeability, but also provides it with excellent heat dissipation. The tiny channels between the coils not only allow air to circulate, but also effectively dissipate the heat generated by the human body through air convection and conduction.
Air convection: When the human body comes into contact with the mattress, a certain amount of heat will be generated. The coil structure of the knitted fabric allows this heat to be quickly taken away by air convection, thereby reducing the temperature of the mattress surface.
Heat conduction: The yarn in the knitted fabric itself also has a certain thermal conductivity. When the temperature on the surface of the knit mattress fabric rises, the yarn can transfer heat to the surrounding air or other materials inside the mattress, thereby dissipating and reducing the heat.
3. Heat dissipation test and evaluation standard
The heat dissipation test is usually carried out by the hot plate method or infrared thermal imager. The hot plate method is to evaluate the heat dissipation by placing a heat source of a certain temperature under the fabric and measuring the change of the surface temperature of the fabric over time. The infrared thermal imager evaluates its heat dissipation by capturing the infrared radiation image of the fabric surface and analyzing the temperature distribution.

3. Comprehensive application of air permeability and heat dissipation of knit mattress fabric
In practical applications, the air permeability and heat dissipation of knit mattress fabric are often complementary. A mattress fabric with good air permeability can ensure that the inside of the mattress remains dry and ventilated, thereby reducing the feeling of dampness and stuffiness; while a mattress fabric with good heat dissipation can quickly dissipate the heat generated by the human body and maintain a suitable temperature on the surface of the mattress. Therefore, when choosing a knitted mattress fabric, it is necessary to comprehensively consider its air permeability and heat dissipation to ensure the comfort of the mattress and the user's sleeping experience.