Thermal felt (thermopressed felt) is a non-woven material consisting of natural and synthetic fibers. It is one of the most popular materials used in combination with other materials in the manufacture of modern mattresses.
Appointment of thermal pad in mattresses
The thermal felt used in mattresses with orthopedic properties protects the coating. The design of the mattress provides for the separation of the spring block from the coating with a layer of thermal felt. Due to the properties of the material, uniform pressure of the springs on the human body is ensured over the entire surface of the mattress. The mattress gains comfort, while maintaining the required level of rigidity.
The composition of the thermal felt
The composition of the material does not have strict regulation, therefore, manufacturers of products independently establish the proportions of fibers of natural and synthetic origin. As natural raw materials, wool, cotton, jute and linen fibers are used, which occupy up to 60% in the volume of thermal felt. The presence of synthetic fibers is limited to 35–40%. However, there are also such samples of thermofelt, where synthetics are not used at all, or only synthetic components are present in the composition.
Among the fibers of synthetic origin, polypropylene and acrylic are most common. Polypropylene has a number of worthy qualities: it is durable, reliable and resistant to high loads. Acrylic has a low level of thermal conductivity. In addition to these materials, a number of manufacturers use fibers of polyester and polyamide composition as components in the composition of thermal felts.
Thermal pad characteristics
The thermal lock is supplied in sheets a little over 2 meters wide, which is enough to make a mattress, ensuring a minimum amount of waste. The main characteristics of thermofelt, which is popular among manufacturers and consumers, include:
- The density of the material. A surface density of approximately 1 kg / m2 provides a high level of tensile strength and low deformability. In the most traditional versions of mattresses, consisting of spring blocks, the thermowel acts as an insulating layer of polyurethane foam. This method of the device allows to provide comfortable operating conditions of the upper layer of the mattress;
- The rate of elongation at break and the value of the tensile load. These characteristics show the amount of stretching of the material and the amount of body weight that the mattress can withstand without fear of damage to the thermal felt;
- The indicator of durability, that is, resistance to physical wear. Material, possessing quality indicators, does not lose its properties over a long time of operation;
- Thickness. The indicator is 3 mm or more, it may vary depending on the manufacturer and models of the mattresses manufactured;
Attention! It is a hygienically safe material, can be used by allergy sufferers and does not have a polluting effect on the environment when destroyed.
The technology for the production of thermofelt provides for the use of specialized equipment - pinching and scratching machines that perform operations to prepare the fibers for further processing. Then, the fibers are mixed and formed in a special machine, after which the material is held together by needle-piercing (piercing method) or thermal bonding. In order to ensure reliability, many manufacturers use a thermal method after flashing. In the process of thermal bonding, the workpiece is heated to a temperature of 1900 WITH and perform pressing using a machine specially designed for this purpose. After the melting of the synthetic fibers, a reliable bonding of the material occurs.
Important!Experts recommend choosing mattresses from a mixture of thermal felt, natural and synthetic fibers. It is the filler of this composition that has the appropriate hygienic properties, has high wear resistance and strength.
Among the variety of fillers, many prefer to choose mattresses with thermal felt, given the natural origin. Creating a healthy microclimate in the bedroom, natural felt is well ventilated, dries quickly and does not absorb odors. However, modern artificial analogues are not inferior to natural felt in terms of characteristics. They also have hypoallergenic properties, are breathable and have other advantages.