Polybutylene Terephthalate (PBT)

To satisfy critical fire safety requirements in high-voltage microelectronics without compromising electrical insulation or physical finish, BASF’s Ultradur B4406 leverages an unreinforced, polybutylene terephthalate matrix with a specialized, migration-free flame retardant package. Boasting a density of 1.45 g/cm³ and a melt volume-flow rate of 19 cm³/10 min, this pure PBT grade achieves an outstanding UL 94 V-0 rating down to a thin-walled 0.4mm. Jucheng Precision, under ISO 9001 and IATF 16949 certified systems, excels in high-precision molding of Ultradur B4406. Using S136 stainless steel molds, we prevent corrosive outgassing wear, delivering flash-free, stable electronic connectors verified by Zeiss CMM.

Securing excellent dimensional stability and high elongation-at-break without the added weight of glass fibers requires a balanced engineering polymer, which BASF’s Ultradur B4500 delivers through its unreinforced, medium-viscosity polybutylene terephthalate matrix. Boasting a density of 1.30 g/cm³ and a melt volume rate of 19 cm³/10 min (at 250°C/2.16kg), this pure PBT grade is globally specified for high-precision components, food-contact systems, and thin-walled profiles. Jucheng Precision, operating under IATF 16949 and ISO 9001 frameworks, specializes in molding Ultradur B4500. Backed by 35+ advanced presses and five-axis tooling, we control its high semi-crystalline shrinkage (1.6%-1.9%) to eliminate warpage, delivering flawless components verified by Zeiss CMM.

Achieving uncompromised electrical insulation alongside heavy-duty mechanical stiffness under high heat requires a high-performance polyester, which Celanese’s Crastin SK605 (formerly DuPont) delivers through its 30% glass fiber reinforced polybutylene terephthalate matrix. Featuring a density of 1.53 g/cm³ and a melt mass-flow rate of 10 g/10 min, this lubricated, semi-crystalline grade is the global benchmark for intricate automotive connector arrays, electrical bobbins, and consumer appliances. Jucheng Precision, under IATF 16949 and ISO 9001 frameworks, specializes in molding Crastin SK605. Supported by our 5-axis CNC-machined H13 steel tooling, we control its anisotropic shrinkage (0.3% parallel, 1.1% normal) to eliminate warpage, verified by Zeiss CMM.

To achieve ultimate dielectric isolation, high-heat flammability resistance, and superior impact toughness in electrical enclosures, SABIC's Valox 357 stands as the premier unreinforced PBT+PC alloy benchmark. Featuring a density of 1.34 g/cm³ and a non-blooming flame retardant package, this material delivers a V-0 flammability rating at 0.75mm and a 5VA rating at 2.5mm. Jucheng Precision, operating under IATF 16949 and ISO 13485 frameworks, specializes in molding Valox 357. Backed by 35+ advanced injection presses and 5-axis CNC-machined H13 tooling, we control its complex alloy shrinkage (0.8%-1.4%) to eliminate weld-line weakness, delivering high-gloss, pristine electrical components verified by Zeiss CMM.

Sustaining high mechanical torque and exceptional dimensional stability under high-voltage EV and under-the-hood thermal loads requires a heavy-duty composite, which SABIC's Valox 420 delivers through its 30% glass fiber reinforced polybutylene terephthalate matrix. Boasting a high density of 1.53 g/cm³ and a heat deflection temperature (HDT) of 207°C, this semi-crystalline grade is globally specified for electric motor components, spotlight housings, and heavy-duty connectors. Jucheng Precision, operating under IATF 16949 and ISO 9001 frameworks, specializes in molding Valox 420. Utilizing 5-axis CNC-machined S136 tool steel cores hardened to 50 HRC, we control its anisotropic shrinkage (0.3%-1.0%) to prevent warpage, delivering flash-free structural parts verified by Zeiss CMM.