Injection molding an IC into a connector or consumable item

Front Zone Temp. (°C)Mold Temperature (°C)Sterilization Compatibility^{7, 8, 9, 10} ABSAcrylonitrile butadiene styreneLowAmorphous210 to 23263 to 85
49 to 85ETO CD RADHDPEHigh-density polyethyleneLowSemi-crystalline199 to 227
171 to 19921 to 66
21 to 52ETO CD (rad)LDPELow-density polyethyleneLowSemi-crystalline199 to 22721 to 66ETO CD (rad)PANylon 6/6MediumSemi-crystalline282 to 293
249 to 27166 to 107AUT ETO CD VHPPBTPolybutylene terephthalateMediumSemi-crystalline243 to 257
216 to 23266 to 121AUT ETO RADPCPolycarbonateMediumAmorphous293 to 310
216 to 23282 to 121
66 to 121AUT ETO (rad)PETPolyethylene terephthalateMediumSemi-crystalline238 to 260135 to 163AUT ETO RADPMMAAcrylicLowAmorphous188 to 210
221 to 23879 to 107
38 to 66ETO CD VHPPOMAcetalMediumSemi-crystalline188 to 210
177 to 19982 to 121AUT ETOPPPolypropyleneLowSemi-crystalline204 to 227
177 to 19332 to 66AUT ETO CD VHPPSPolystyreneLowAmorphous221 to 238
204 to 22138 to 66ETO CD VHP RADSANStyrene acrylonitrileLowAmorphous243 to 260
210 to 23252 to 82
38 to 79—
Legend:
AUT: material is well suited for autoclave sterilization.
ET material is well suited for etylene oxide sterilization.
CD: material is well suited for chlorine dioxide sterilization.
VHP: material is well suited for vaporized hydrogen peroxide sterilization.
RAD: material is well suited for gamma ray or electron beam sterilization.
(rad): material may change its characteristics, e.g., discolor, when exposed to gamma rays or electron beams.

The temperature values above are compiled from data on the RTP Company¹¹ website. Each plastic type usually has several variations with different processing and mold temperatures. Other vendors may offer工字电感 the same plastic type with slightly different processing requirements. Additives such as reinforcement fibers, pigment, flammability reduction compounds, or conductivity enhancers can also impact the processing conditions. As a guideline, one should select the plastic based on the nozzle temperature or the front zone temperature as specified in the processing conditions for injection molding of plastics. For injection molding at 183°C, the choice of plastic is very limited. At 217°C, most of the materials in Table 1 are feasible. Materials such as nylon (PA) or polyethylene terephthalate (PET) can be used only if the IC功率电感 is not soldered to a substrate. The plastic cools off rapidly inside the mold cavity. In summary, one should make sure that when the plastic enters the mold, it does not exceed the critical temperature.

Sterilization compatibility

Products for medical applications typically undergo sterilization, at least once or even multiple times during their lifetime. Popular methods are autoclave steam sterilization, ethylene大功率电感 oxide (ETO) sterilization, chlorine dioxide (CD) sterilization, vaporized hydrogen peroxide (VHP) sterilization, hydrogen peroxide plasma sterilization, and irradiation with gamma rays or electron beams. The sterilization compatibility information in Table 1 is compiled from various publications. A report on hydrogen peroxide gas-plasma compatibil一体成型电感器ity was not found. In any case, caution is advised since the test methods and details are not fully disclosed. For objects with an embedded IC the preferred sterilization methods are ETO and CD. Autoclave and VHP may also be acceptable, although the high temperature or vacuum required by these methods can affect embedded batteries or floating-gate memory cells. Hydrogen peroxide gas-plasma sterilization and irradiation (gamma ray or electron beam) are not recommended since they can damage ICs.平面变压器厂家 | 平面电感厂家

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