Infant feeding
Mouth-contact safety first
Material grade, softness, overmold isolation and leak-tight structure are the four control points. PP and PPSU bottle overmolding is our main category.
Bottle overmoldingTeethers
Compounds and process windows are managed per application: infant mouth-contact parts are judged on safety and hand-feel, medical components on system and traceability, industrial seals on weathering and dimensional stability.
Bottle overmolding, 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, and the structure is engineered to be leak-tight and drop-resistant. BPA-free, with softness and rebound tuned to a baby's feeding action.
Medical seals, catheter and respiratory silicone components, covering silicone parts for medical, rehabilitation, nursing, protective and assisted-reproduction devices. Production runs inside a Class 100,000 cleanroom with batch traceability, and parts are compatible with common sterilization methods.
Overmolding onto PPSU, PA and PC is our mature, high-volume process; stainless steel and metal inserts are delivered just as reliably. The engineering problem is always the same: bond strength between dissimilar materials, fatigue resistance and cosmetic consistency — no delamination, no flash. PP + silicone is harder still: its heat deflection temperature sits just under LSR's cure temperature and the interface resists bonding, so very few plants in China can hold it at volume. It is our core moat — the recipe took 18 months and dozens of rejected material combinations to freeze, and these parts are validated through 70 cycles of 5-minute boiling plus cooling, the duty an infant product actually sees.
Metal-bonded seals, wiring-harness boots, O-rings and custom sealing geometries. Silicone's temperature range and aging resistance make these parts outlast general-purpose rubber outdoors, in engine bays and in humid environments; dimensional stability is held by tooling and cure parameters together.
Silicone lenses, optical-grade precision components and thin-wall parts. The value of a silicone lens is impact resistance, flexibility and design freedom; the difficulty is transmission consistency and internal stress control. We run 2.5D optical measurement and VOC testing so dimensions and appearance stay traceable.
Design and manufacture of solid and liquid silicone molds, plus plastic molds. Before cutting steel we run a DFM review: parting line, venting, cold-runner layout, cavitation and ejection — these are the variables that decide yield. Because the tool is built in-house, we control the pace of modification and trial shots instead of waiting on an outside supplier.
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.
The same silicone part has completely different material and validation requirements in infant, medical, automotive and electronics applications.
Material grade, softness, overmold isolation and leak-tight structure are the four control points. PP and PPSU bottle overmolding is our main category.
ISO 13485 system, cleanroom, batch records and sterilization compatibility. Compliance comes before cost discussion.
Temperature, oil and aging resistance, combined with metal overmolding to solve assembly and sealing in one part.
Thin-wall precision molding, optical-grade clarity and cosmetic consistency for lenses, keys and waterproof structures.
Send 2D / 3D files or a sample. We run the DFM review first, then talk about quoting and prototyping — the review is free.