Engineering Safety for Baby & Travel

Technical Whitepaper: Soft Material Engineering

1. The Physics of Liquid Silicone Rubber (LSR)

Unlike thermoplastics (PE, PET) which are melted and cooled, Silicone is a thermoset elastomer based on an inorganic silicon-oxygen backbone. This chemical structure gives it properties that are critical for maternal and travel applications.

Thermal Stability & Sterilization

For maternal products, hygiene is non-negotiable. Parents must be able to sterilize bottles. Standard plastic bottles can warp or release microplastics under high heat. Our LSR packaging remains stable from -50°C to 200°C. This means Golden Soar’s silicone bottles can be boiled, steam-sterilized (electric steamer), or even dishwashed without degradation, ensuring a sterile environment for milk or formula.

Biocompatibility

Silicone is biologically inert. It does not support microbiological growth (mold/bacteria) and is hypoallergenic. This makes it the only logical choice for nipples, teething toys, and direct-contact skin care applicators. We utilize platinum-cured silicone which leaves no by-products, ensuring the material is odorless and tasteless.

2. Leak-Proof Valve Engineering

The “Travel Disaster”—shampoo exploding in a suitcase—is a failure of rigid packaging physics. At 30,000 feet, cabin pressure drops. The air inside a rigid bottle expands, pushing the liquid out through the path of least resistance: the threads or the flip-top.

We engineered a solution based on two principles:

• Flexible Expansion: The soft silicone body allows for slight expansion, accommodating the internal pressure increase rather than fighting it.
• Cross-Slit Valve Technology: Inside the cap, we integrate a silicone membrane with a precision-cut cross slit. This valve remains physically closed by the material’s own elastic memory. It only opens when external squeeze pressure is applied. This means even if the flip-top lid pops open in a bag, the liquid cannot flow out passively.

3. Structural Integrity: The Co-Injection Process

One weakness of silicone is that it is too soft to hold a screw thread securely. A pure silicone neck would deform, causing the cap to pop off.

Golden Soar utilizes Bi-Injection (Overmolding) Technology. We mold a rigid PPSU or PP ring first, and then overmold the Liquid Silicone Rubber onto it. This creates a chemical and mechanical bond. The result is a bottle with a soft, squeezable body but a rigid, non-deformable neck finish. This ensures a hermetic seal with the cap, preventing leaks at the collar—a common failure point in cheaper silicone travel bottles.

4. Sustainability & Reusability

The travel industry is moving away from single-use miniatures. Our silicone travel bottles are designed for thousands of refill cycles. The wide-mouth design (enabled by the flexibility of the material) allows users to easily refill from bulk containers and, crucially, to clean the inside of the bottle thoroughly with a brush. This supports the “Refill Revolution” in personal care.

To learn more about the raw material specifications, please visit our Packaging Materials Guide.