The wire and cable industry is in the process of rapid development, but the cable industry is generally in the stage of winning by quantity. The quality improvement work needs to be given great attention. In order to ensure the safety performance and life of wire and cable, the technical level of quality control must be It is subjected to a heat aging performance test. The heat aging test of wire and cable is carried out in a gas aging test chamber. The main parameters of the control aging test chamber are temperature and air exchange. The temperature parameters are always noticed by the units of use and are important parameters for metering, but the parameters of the air exchange are often ignored. In fact, the amount of ventilation is also a very important indicator. In the case of constant temperature, the wind speed is large, the gas exchange amount is large, the convection is sufficient, and the aging effect is obvious; on the contrary, when the wind speed is small, the gas exchange amount is small, and the aging effect is slow. In order to ensure the aging performance of the ventilation aging test chamber, JB/T4278.6-2011 "Rubber plastic wire and cable test equipment equipment verification method natural ventilation heat aging test chamber" is required; at the specified test temperature, all air exchange in the box The number of times is 8 to 10 times/h.
Thermal roll paper
Thermal paper is also called thermal fax paper, thermal recording paper, thermal Copy Paper, and thermal copy paper in Taiwan. Thermal paper is a kind of processed paper, and its manufacturing principle is to coat a layer of "heat sensitive paint" (heat sensitive color change layer) on high-quality base paper.
Although there are more than a dozen chemicals used in this color change layer, there are at least the following compounds: leuco dyes, the dyes are of a wide variety, the most commonly used are fluorescent compounds; the color developer accounts for less than 20%, and the commonly used are double Phenol, p-hydroxybenzoic acid; sensitizers account for less than 10%, which contains benzenesulfonic acid amide compounds; fillers account for less than 50%, commonly used calcium carbonate (fine particles); adhesives account for less than 10%, Such as polyvinyl acetate; stabilizers, such as dibenzoyl terephthalate; lubricants, etc.
Therefore, the process is difficult and the technical requirements are high.
Thermal paper is generally sold in the form of rolls, generally 80mm×Φ60mm, 57mm×Φ50mm and other specifications are the most common. The first number indicates the width of the paper roll, and the back is the diameter. The general error of the width of 1, 2mm will not affect the use, because Printers generally can`t print on the edge
Thermal Roll Paper,Thermal Paper,Thermal Printer Paper,Thermal Receipt Paper
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