An electret is disclosed including: a carrier, and polytetrafluoroethylene having a melting point of 35 C. or higher and 320 C. or lower deposited on the carrier, wherein the electret imparts an electrostatic charge to at least one of the carrier and the polytetrafluoroethylene, and has two or more melting point peaks in simultaneous thermogravimetry and differential thermal analysis. An electret filter is disclosed which preferably is used for a filter which requires durability to tobacco smoke. An electret filter is also disclosed having a fluorine-containing component deposited on a fiber surface, wherein an initial QF value is 0.5 mmAq.sup.1 or more in collection efficiency of particles having a particle diameter of 0.3 to 0.5 m at a wind speed of 5 cm/s, and a filter deterioration rate by tobacco smoke loading is 8/(g/m.sup.2) or more.

A coolant includes a refrigerant, a porous plate-shaped heat insulator, and an enclosure in which the refrigerant and the heat insulator are enclosed in a sealed state, and the heat insulator has a thermal conductivity per unit area of 300 W/(K.Math.m.sup.2) or less and a thickness equal to or greater than 0.5 mm and equal to or less than 10.0 mm.

The present invention provides super-hydrophobic fabrics and a preparation method thereof, and belong to the field of textiles. The super-hydrophobic fabrics are obtained by finishing Pickering emulsion formed by amphiphilic particles stabilizing low-surface-energy substances in water. Via a one-step finishing method using Pickering emulsion technology, facile preparation of durable super-hydrophobic fabrics is realized. The static contact angle between the finished fabric surfaces and water droplets is greater than 150 degrees, and the water droplets can roll off easily; and after being subjected to 30 times of standard washing tests, the finished fabrics still maintains excellent water repellency. In addition, the Pickering emulsion preparation and finishing process of the present invention are environmentally friendly, pollution-free, facile to operate and widely applicable.

An ink jet composition according to the present disclosure contains a flameproofing agent and resin particles. The resin particles are preferably urethanic resin particles. It is preferable that a urethanic resin making up the urethanic resin particles is a urethanic resin containing a crosslinking group and the crosslinking group is one or more selected from the group consisting of a blocked isocyanate group and a silanol group. The urethanic resin making up the urethanic resin particles preferably has a polycarbonate skeleton.

A fabric is treated by applying a nanoparticle type coating to improve their resistance to contamination by foreign matter. The coating is applied during fabric manufacture and cured during heat setting. Alternatively, the coating applied or renewed by utilizing an existing shower or locating a spray boom or other suitable coating application device to apply the coating to the fabric in a controlled, uniform manner. Prior to application of the coating, the fabric is first thoroughly cleaned such as by showering or spraying, and then dried. Following controlled application of the coating, any excess material is removed by a suitable means, such as by vacuum, and the remaining coating on the fabric is then cured, either by utilizing the ambient heat of the equipment or by a portable bank of heaters. In this manner, the fabric does not have to be removed from the machine in order to apply or renew the contaminant resistant coating.

A fabric is treated by applying a nanoparticle type coating to improve their resistance to contamination by foreign matter. The coating is applied during fabric manufacture and cured during heat setting. Alternatively, the coating applied or renewed by utilizing an existing shower or locating a spray boom or other suitable coating application device to apply the coating to the fabric in a controlled, uniform manner. Prior to application of the coating, the fabric is first thoroughly cleaned such as by showering or spraying, and then dried. Following controlled application of the coating, any excess material is removed by a suitable means, such as by vacuum, and the remaining coating on the fabric is then cured, either by utilizing the ambient heat of the equipment or by a portable bank of heaters. In this manner, the fabric does not have to be removed from the machine in order to apply or renew the contaminant resistant coating.

A fabric includes a fabric body and a backing resin layer laminated on a rear surface of the fabric body. The fabric body includes a fluorine-containing organic compound adhered to at least the surface thereof, and the fluorine-containing organic compound has six carbon atoms and at least one fluorine atom. The backing resin layer contains a resin, a flame retardant, and an organic fluorine based oil repellent in which the carbon number is six.

A fabric includes a fabric body and a backing resin layer laminated on a rear surface of the fabric body. The fabric body includes a fluorine-containing organic compound adhered to at least the surface thereof, and the fluorine-containing organic compound has six carbon atoms and at least one fluorine atom. The backing resin layer contains a resin, a flame retardant, and an organic fluorine based oil repellent in which the carbon number is six.

A fabric includes a fabric body and a backing resin layer laminated on a rear surface of the fabric body. The fabric body includes a fluorine-containing organic compound adhered to at least the surface thereof, and the fluorine-containing organic compound has six carbon atoms and at least one fluorine atom. The backing resin layer contains a resin, a flame retardant, and an organic fluorine based oil repellent in which the carbon number is six.

A fabric includes a fabric body and a backing resin layer laminated on a rear surface of the fabric body. The fabric body includes a fluorine-containing organic compound adhered to at least the surface thereof, and the fluorine-containing organic compound has six carbon atoms and at least one fluorine atom. The backing resin layer contains a resin, a flame retardant, and an organic fluorine based oil repellent in which the carbon number is six.