Zhongshan Runweikang Silicone Technology develops liquid silicone rubber (LSR) products, designs and builds the tooling, and molds the parts — under OEM, OBM and ODM programs. Thirteen years doing one thing — silicone products: the standard parts made precise, the difficult parts made stable.
Zhongshan Runweikang Silicone Technology Co., Ltd. was founded in 2013 and is located in Henglan Town, Zhongshan, Guangdong. We develop liquid silicone products, design and build the molds, and manufacture and sell the molded parts — supported by a team of experienced technical and production staff.
The plant runs LIM (liquid injection molding) in a Class 100,000 cleanroom with dedicated laboratory and packing areas. The lab controls inspection data across the whole production chain: a 2.5D optical measuring system for dimensions, VOC testing for volatiles. Every batch carries traceable dimensional, cosmetic and outgassing records.
Over thirteen years we have built up a material library and a set of process windows for infant feeding, medical silicone components, overmolded structures, seals and precision optical parts. The point is not to make silicone parts. It is to make silicone parts repeatable.
We own the equipment, the cleanroom and the inspection line. That is what lets us commit to batch-to-batch consistency.
Compounds and process windows are managed per application: infant mouth-contact parts, medical devices, industrial seals, optical parts.
Baby bottles, silicone bowls, training cups, teethers and nipples. Our strength is silicone-over-PP and over-PPSU bottle bonding: a 360° overmold separates the plastic from the contents, with leak-tight, drop-resistant structures — BPA-free, softness and rebound tuned to how a baby feeds.
Medical seals, catheter and respiratory parts — silicone components for medical, rehabilitation, nursing, protective and assisted-reproduction devices. Molded inside a Class 100,000 cleanroom under ISO 13485, batch traceable, compatible with common sterilization methods.
PPSU, PA and PC overmolding are mature, high-volume processes for us, as is overmolding onto stainless steel and metal inserts. The hard part is bond strength, fatigue resistance and cosmetic consistency. PP + silicone is harder still — very few plants in China can hold it at volume, and it is our core process moat.
Metal-bonded seals, wiring-harness boots, O-rings and custom sealing geometries. Silicone's temperature range and aging resistance outlast general-purpose rubber outdoors, in engine bays and in humid environments; dimensional stability comes from tooling and cure parameters together.
Silicone lenses, optical-grade precision parts and thin-wall components. 2.5D measurement and VOC testing keep dimensions and appearance traceable, batch after batch.
Solid and liquid silicone molds, plus plastic molds. DFM analysis, tool build and trial runs run in sequence in-house, so design changes do not wait on an outside tool shop's schedule.
PP is a low-surface-energy, non-polar semi-crystalline plastic. Chemically it has almost nothing in common with silicone — and the harder constraint is thermal: PP's heat deflection temperature (roughly 90–105°C) sits right under LSR's cure temperature (above 120°C), leaving only a narrow slot to work in. Plenty of plants can produce a sample; very few can hold it in volume, month after month — which is why customers bring their PP projects to us. PPSU, PA and PC overmolding, by contrast, have long been routine production here.
Material requirements differ widely between these markets. We have built a dedicated compound library and process experience for each.
We write down what we have learned about materials, processing and part design. It saves engineers time — and it is how they find us.
Low surface energy is only the first gate: PP's heat limit sits under LSR's cure temperature, and the primer has to resist hydrolysis. How delamination and warpage actually happen — and why 70 boils is the number that proves it.
Read the article →Why it survives -50 to 230°C, why it can be as soft as Shore A 0, why the body accepts it — three capabilities, three different origins in the chemistry.
Selection guideLiquid is not automatically better. Decide on volume, geometry complexity, tolerance and cost — with a comparison table.
Selection guideHow to specify Shore hardness, what ISO 10993 and ISO 13485 each cover, and how EtO and gamma sterilization affect the compound.
ISO 9001 covers development, production and sales of silicone parts across all product lines. ISO 13485 covers silicone components for medical devices.
Share 2D / 3D files or a sample. Our engineers run a DFM review first, then come back with a prototyping and production plan — including difficult substrates such as PP and PPSU.