Manufacturer: Nanya Plastic Co., Ltd

introduction

PET has a melting point of 260 °C, except that it can be obtained by the reaction of ethylene glycol and Purified Terephthalic acid (PTA). It can also be obtained by the reaction of ethylene glycol and dimethyl terephthalate (DMT). And because the extended PET can get very good strength,therefore, in addition to the great use of PET in synthetic fibers, the demand for applications such as extension film and blowing cylinders is also quite large. Since PET has been mass-produced for the above purposes, the price of PET has been reduced. As for the development of PET in the use of engineering plastics, it is later than the development of synthetic fiber use, and its main features are better heat resistance, rigidity and lower price.because the addition of glass fiber to the various physical properties of PET has a very good effect, in order to fully play the above characteristics of heat resistance, rigidity and cheapness of PET plastic, almost all of the PET used as engineering plastics on the market is glass fiber reinforced PET. Although PET has the above attractive characteristics such as heat resistance, rigidity, etc. in engineering plastics, PET engineering plastics are more common than other general-purpose engineering plastics because of their crystallization rate such as Nailong, POM, PBT, etc. is slow, affecting its efficiency in processing and molding, so the demand for PET is also greatly affected, recently South Asia Plastics Company spares no effort in the study to improve the crystallization speed of PET, and has launched some crystallization speed improvement of PET engineering plastics, it is expected that the demand for PET engineering plastics in the future will be improved with the crystallization speed, and there is a significant continuous growth.

Characteristic

1. Good strength and rigidity.

High rigidity is another major feature of FR-PET in addition to heat resistance, and when compared with PBT engineering plastics with similar properties, the rigidity of FR-PET is about 30% higher than that of PBT with the same ratio of glass fiber. Because FR-PET has good rigidity, it is considered to be suitable for molded products with thin thicknesses. The higher the flexural elasticity of engineering plastics, the higher their rigidity.If FR-PET with 55% glass fiber is added as an example, its bending elasticity can reach 180,000kg/cm 2, which can reach about 1/4 of aluminum alloy, while other general-purpose engineering plastics cannot achieve this degree of rigidity if glass fiber is added, and mineral fiber must be added to achieve this degree of rigidity.

2. Good electrical characteristics: The electrical characteristics of FR-PET and PBT are close to each other, which are quite good, and can be used as insulation materials for electrical and electronic products. (as shown in Table 2)

3. Heat resistance: PET engineering plastics with glass fiber (FR-PET) have quite good heat resistance, which is a major feature, as shown in Table 3, FR-PET has a relatively high melting point and heat deflection temperature. As shown in Table 4, the long-term use temperature of flame-retardant grade FR-PET is higher than that of other commonly used flame-retardant grade general-purpose engineering plastics.

4. Chemical resistance: Because reinforced PET resin is also a kind of polyester, it will react with strong acids, alkalis, water vapor, etc. to produce the phenomenon of water decomposition, which is a common phenomenon of all polyester plastics. However, reinforced PET resin has good resistance to organic solvents, oils, etc. (as shown in Table 5)

5. Weather resistance: FR-PET resin has good weather resistance. Figure 5 shows the results of comparing the changes in tensile strength of FR-PET after 10,000 hours of testing by a weathering tester, showing that the tensile strength retention rate of FR-PET with pigment coloring is better than that of natural color.

Molding condition

Dry：140°C 3hr /120°C 4hr

※Suggestion use: dehumidification dryer

Injection temperature：255~275°C

Mold temperature：105~125°C