Polyimide ProcessingAfter decades of development, it has alwaysheld that the concept of polyimide difficult to process should be revised.Polyimide fact already applied to most polymer processing methods.For example, by solution cast film, spincoating and screen printing; can be hot melt processing methods, extrusion,injection molding, even very low melt viscosity can be obtained prepolymertransfer molding (the RTM); you can use high solid content, preparation (PMRmethod) prepreg prepolymer solut ...

Optical propertiesIn recent years, the optical properties ofthe polyimide has attracted much attention. This is also due to the highthermal stability of polyimide, and engage in mechanical properties, ease ofprocessing and structural characteristics due to easy cut. The so-calledoptical properties of a wide range, mainly refers to the transparent, specificrefractive index, specific birefringent, nonlinear optical properties,electroluminescent or light-to-luminescent properties. For the latter tw ...

Physical heat resistance and temperatureIt refers to a material in the heatresistance while maintaining performance available can withstand temperatures.Usually a glass transition temperature TG is represented. As astructural material, the design temperature should be in the following TG30 ~ 50 ℃. As a non-structural materials, insulating materials, the use oftemperature can be higher.So to answer "How much of thismaterial may be in use?" This question is quite complex This is because ...

Flow coating testThe flow-through test can be used to evaluate thecompatibility and defoaming effect of the defoamer with the coating systembeing tested. The samplesubjected to the stirring test was immediately poured onto a polyester film. Polyester film to be placed in avertical tilt angle of 25 degrees on the frame. Carefully observe the flow smears, showing the presence ofbubbles. The method canalso evaluate the defoaming effect of the defoamer by observing the dry film. In some cases, extre ...

Chemical heat stability of the polymerBefore discussing the polyimide thermal andthermal oxidative decomposition we should first discuss the thermal stabilityof polymer chemistry, physical heat resistance, and temperature. Chemicalthermal stability means that the polymer thermal decomposition of high and lowtemperature, generally measured by TGA. As the temperature begins to decompose,and the temperature of 5% weight loss of 10% weight loss temperature isrepresented.The so-called "Start dec ...

Silicone resin ProgressSilicone is a kind of variety, excellentperformance, good safety and wide application of new special polymer compositematerials. At present, all kinds of silanes, siloxanes intermediates preparedby their silicone oil, silicone rubber, silicone resin, a silane coupling agentand ghost emulsion products. It has been widely used in electrical andelectronics, construction, automotive, textile, light industry, cosmetics,medical, food and other industries, and has played an activ ...

Aerosol-type silicone release agentAerosol-type silicone release agent isdimethyl silicone oil, methylphenyl silicone oil or long-chain alkyl-modifiedsilicone oil to make the active ingredient. Freon -11 -22 Freon or Freonsubstitutes are packaged together as a propellant in aerosol cans in the dosageform. Tap the hand valve on the tank to the mold surface when using spraycoating, with easy to use features. Adhesion is mainly used to prevent releasemelt-spinning orifice and synthetic fibers of PE ...

Low surface energy silicone marineantifouling coatingsOrganic silicon antifouling paint has asmooth surface, marine life is difficult in the above attachment, even if notfirmly attached, in water or other external force is very easy to fall off.Studies have shown that the surface coating can be less than a 12 X10 N / m, inorder to effectively prevent the attachment of marine organisms.

Cosmetic matrix materials1) GreaseGrease is the basic raw materialcomposition of Cream Cosmetic, mainly from the skin, silky and moisturizingeffects. Fatty acid glycerides animal fat is the main component of thecomposition, in liquid at room temperature is referred to as an oil, in a solidstate is called fat. According to sources can be divided into vegetable oilsand animal fats. Vegetable oils including coconut oil, olive oil, castor oil,almond oil, peanut oil, soybean oil and palm oil. Animal ...

Classification of surfactantsThere are many methods for classifying surfactants, which are classified according to the source of the surfactant. Surfactants are generally classified into three types: synthetic surfactants, natural surfactants and biosurfactants.Synthetic surfactantSynthetic surfactant refers to a surfactant prepared by chemical synthesis using petroleum and natural gas as raw materials. The difference in properties of surfactants, in addition to the size and shape of the hydroca ...