Detailed description of the process of manufacturing fibreglass surface tissue
fibreglass surface tissue is a kind of inorganic non-metallic material with excellent performance. The material has very high insulation, heat resistance, corrosion resistance and mechanical strength, and is commonly used as reinforcing materials in composite materials, electrical insulation materials and thermal insulation materials, circuit substrates and other areas of the national economy, and is a new material industry encouraged by the state. It is widely used in petroleum, chemical, construction, environmental protection and aviation, national defense and other fields.
I. Raw material processing of fibreglass surface tissue
The production of fibreglass surface tissue is inseparable from the participation of non-metallic ores, mainly with six kinds of ores, such as chlorite, quartz sand, limestone, dolomite, boron calcium stone and boromagnesite as raw materials.
Second, with the preparation of material
E glass powder is characterized by dry micronized powder with good fluidity, which requires fully sealed operation in preparation to prevent dust from flying. Material conveying using pneumatic system; weighing using electronic weighing; mixing most of the use of pneumatic mixing and conveying equipment. The conveying, weighing, mixing and sending of materials to the kiln head bin can be completed continuously and automatically. The dosing production process is mainly composed of three parts: feeding, weighing and mixing, conveying.
Three, fibreglass surface tissue melting
The melting process of fibreglass surface tissue refers to the process of transforming the mating material into homogeneous glass liquid after silicate reaction and melting at high temperature.
Melting refers to the process of solid phase fusion after the reaction of the mating material; clarification refers to the process of removing air bubbles from the molten glass; and homogenization refers to the process of reducing defects such as lines, streaks, and nodules to a tolerable level, as well as the process of homogenizing the chemical composition of the glass. These processes are crossed in stages.
IV. Infiltrant of fibreglass surface tissue
In the glass fiber drawing process, it is necessary to coat the glass fiber surface with a special surface treatment agent in the form of an organic emulsion or solution with a multiphase structure.
Effects: Effective lubrication of the glass fiber surface; integration of hundreds or even thousands of glass fiber monofilaments into a bundle; improve the surface state of the glass fiber; provide further processing and application of the required characteristics; so that the glass fiber to obtain good compatibility with the substrate and interfacial chemical adsorption properties.
V. Forming of fibreglass surface tissue
After the high-temperature viscous glass liquid flows out from the funnel in the form of drops, it is drawn and cured into continuous glass fibers of a certain diameter by the drawing machine below at a certain constant speed. At the lower part of the nozzle exit, due to the balance between the surface tension of the glass liquid and the drawing force, a crescent-shaped part with a tapering diameter is formed, called the filament root. From the exit of the funnel until the final diameter of the unchanging fiber, this distance is called the fiber forming line. The interval containing this fiber forming line is called the fiber forming zone. The distance from the exit of the spout to the fiber winding point on the drawing machine is called the drawing line, this distance can be artificially specified longer or shorter depending on the process requirements.
Six, fibreglass surface tissue of the original filament drying
In order to reduce the contact friction between the fiber and the collector and the line, and to protect the original shape of the fiber and give the fiber some special properties, in the process of drawing into shape must be coated with an impregnating agent on the outer surface of the fiber through the oiling roller or slot wheel. Such impregnants can be divided into two categories: starch-based and reinforced, the former for textile sand, the latter for reinforced products. They are usually aqueous emulsions. The liquid is more than 80% water, except for the main components such as lubrication and bonding. Generally a raw silk cake contains about 8% to 14% of its total weight in water. This water has a negative impact on the post-processing process and products, so it must be removed.
For the non-reinforced common glass fiber filament, the water content of the original filament is allowed to be larger, and the original filament takes a longer time from drawing, de-merging, warping, weaving and other processes, so it only needs to be dried naturally to meet the requirements of the production process and products, the specific practice is to hang the original filament on a cart and put it in a room at room temperature for 1~2 days to let it dry naturally. The raw yarn can also be dried with hot air (30~40℃) when it is retired.
The water content of the reinforced glass fiber must be controlled within a certain range, and the general water content is about 0.1%, some up to 0.07%. It is difficult to achieve the above requirements with natural drying, which must be given artificial drying using special drying equipment.