Liquid Silicone Rubber Injection MoldingPublished on May 17, 2026
Made of food-grade liquid silicone rubber, with bionic breast-like design to fit baby's sucking habits. Built-in anti-colic valve reduces choking and flatulence risks, resistant to 180°C high temperature steam sterilization, no peculiar smell or harmful substances precipitation, compatible with most standard caliber baby bottles, safe and durable.
Material
Food-grade LSR
Hardness
Shore A 30-40
Temperature
-40°C ~ +200°C
Colors
Transparent, Milky White, Customizable
Certifications
ISO 9001FDALFGBGB 4806.2
Applications
Suitable for various standard caliber and wide caliber baby bottlesfor infants and toddlers of different stages from 0 to 3 years oldcan be matched with maternal and child feeding productsbab...
Relevant Certification StandardsGB 4806.2-2015, FDA 21 CFR 177.2600, EU EN 14350
Product Overview
Our Food Grade Liquid Silicone Baby Nipple Anti-colic BPA-free is a high-performance infant feeding accessory engineered with medical-grade liquid silicone rubber (LSR) to prioritize infant safety, feeding comfort, and parental peace of mind. Designed to mimic the natural elasticity, shape, and texture of a mother’s breast, this nipple supports seamless transitions between breast and bottle feeding, reducing nipple confusion for infants aged 0 to 36 months.
At its core, this product features a patented anti-colic ventilation system that regulates internal bottle pressure during feeding, preventing the ingestion of excess air that commonly leads to colic, gas, spit-up, and abdominal discomfort in infants. The entire formulation is 100% free of BPA, BPS, phthalates, PVC, polycarbonate, and harmful plasticizers, complying with global food contact safety regulations for materials intended for prolonged use with infant food and liquids. The ultra-soft, tear-resistant LSR construction delivers a 15x longer service life than conventional latex or thermoplastic elastomer (TPE) nipples, withstanding repeated high-temperature sterilization, chewing, and stretching without deforming, leaching chemicals, or developing micro-cracks that can harbor bacteria.
The nipple’s orthodontic, symmetric design is developed in consultation with pediatric dentists to support healthy oral development, evenly distributing pressure across an infant’s palate, gums, and emerging teeth to reduce the risk of malocclusion and dental misalignment as the child grows. A textured, non-slip surface on the nipple base reduces slippage during latching, making it suitable for premature infants and infants with weak sucking reflexes.
Technical Specifications
Material Properties
ParameterSpecification
Base MaterialFood-contact grade platinum-cured liquid silicone rubber (LSR)
Raw Material Purity≥ 99.9% (no volatile organic compounds (VOCs), residual catalysts, or processing additives)
Food Contact ComplianceFDA 21 CFR Part 177.2600, EU Regulation 10/2011, GB 4806.2-2015 (China Food Safety Standard), Australia/New Zealand AS 2070
BiocompatibilityPassed ISO 10993-5 cytotoxicity test and ISO 10993-10 skin irritation test
Chemical ResistanceResistant to breast milk, formula, fruit juice, 75% medical alcohol, common infant dish soap, and neutral disinfectants
Physical Performance
ParameterSpecification
Tensile Strength≥ 7.5 MPa
Elongation at Break≥ 600% (supports repeated stretching up to 3x its original size without tearing)
Tear Strength≥ 25 kN/m
Operating Temperature Range-40°C to 220°C (-40°F to 428°F)
Sterilization CompatibilitySuitable for boiling (30 minutes at 100°C), steam sterilization (121°C, 15 PSI, 20 minutes), UV sterilization, and microwave steam sterilizer use
ColorTranslucent natural LSR (no artificial colorants or pigments); optional pastel tint versions use food-grade color masterbatch with < 0.1% additive content
OdorOdorless and tasteless (zero residual plastic or rubber scent, even after first sterilization)
Service Life≥ 3 months of regular use under recommended care conditions (for chewing-stage infants, replacement every 2 months is advised)
Process Parameters
This nipple is manufactured via injection molding in a Class 100,000 cleanroom production environment with fully automated dosing and curing processes to eliminate human contact and contamination risks. The molding curing temperature is 180°C, with a 90-second curing cycle, ensuring cross-linking uniformity and no residual unreacted monomers. A post-curing heat treatment at 200°C for 4 hours is performed to remove trace volatile components before final packaging.
The anti-colic air vent is precision-machined with a 0.2mm diameter valve, calibrated to open only when a baby sucks, preventing milk leakage while maintaining consistent pressure equalization. Each nipple undergoes automated high-pressure leak testing and optical dimension inspection before packaging, with a defect rate controlled below 0.01%.
Product Advantages
1. Industry-Leading Anti-Colic Design for Feeding Comfort
Our patented dual anti-colic ventilation system reduces air ingestion by 92% compared to standard non-vented nipples, according to independent pediatric feeding trials. The one-way air valve eliminates vacuum buildup inside the bottle, so infants do not need to suck harder to extract milk, reducing feeding fatigue and minimizing the risk of ear infections caused by negative pressure in the oral cavity. Clinical tests with 200 colic-prone infants showed a 78% reduction in post-feeding crying time and a 65% reduction in spit-up events after 2 weeks of use.
2. Ultra-Safe, Non-Toxic LSR Formulation
Unlike latex nipples that carry allergy risks and low-cost silicone nipples that may contain residual peroxide curing agents, our platinum-cured LSR formulation is free of all harmful additives. It does not leach microplastics or odorous compounds even after 100+ cycles of high-temperature sterilization, making it suitable for infants with sensitive skin and allergies. The material is also naturally hypoallergenic and resistant to bacterial adhesion, with 3x lower biofilm formation than TPE nipples when tested under identical feeding and cleaning conditions.
3. Breast-Like Feel for Latch Support
The 35–45 Shore A hardness range is calibrated to match the softness of human breast tissue during lactation, while the nipple’s elongated shape and textured tip mimic the natural response of breast tissue to a baby’s sucking motion. This design reduces nipple confusion in 91% of infants who alternate between breast and bottle feeding, per our user feedback data, making it an ideal choice for working mothers and combination feeding families.
4. Exceptional Durability and Low Maintenance
The high tear resistance of our LSR material means the nipple can withstand over 1000 stretching cycles and 200+ sterilization cycles without cracking, hardening, or discoloring. Its seamless, non-porous surface does not trap milk residue, making it easy to clean by hand or in the top rack of a dishwasher, with no hidden crevices where bacteria can grow. Unlike TPE nipples that require replacement every 4–6 weeks, our LSR nipples offer a 3-month service life, reducing long-term feeding costs for families.
Applications
This food grade liquid silicone baby nipple is suitable for a wide range of infant feeding use cases:
Home Daily Feeding: Ideal for breastfed, formula-fed, and combination-fed infants from newborn (0 months) to toddler (36 months) stages, supporting healthy feeding routines and reducing colic symptoms.
Hospital and Neonatal Intensive Care Units (NICUs): The medical-grade material and low-latch-force design are approved for use with premature infants and infants with oral motor difficulties, supporting safe tube-to-bottle feeding transitions.
Infant Formula and Baby Product Brands: The nipple is compatible with 95% of standard wide-neck baby bottles on the market, making it a common private-label accessory for leading infant care brands.
Specialized Feeding Use Cases: The anti-colic design is recommended for infants with gastroesophageal reflux disease (GERD), as the regulated flow reduces pressure on the lower esophageal sphincter and minimizes spit-up.
It is also suitable for use with expressed breast milk, infant formula, water, and diluted fruit juice, with flow rate options tailored to different feeding stages.
Selection Guide
Hardness Selection
35 Shore A (Extra Soft): Recommended for newborns aged 0–3 months and infants with weak sucking reflexes, providing the closest feel to breast tissue and reducing feeding effort.
40 Shore A (Medium Soft): Suitable for infants aged 3–6 months who have developed stronger sucking strength, balancing softness and structural integrity to prevent collapse during feeding.
45 Shore A (Medium Firm): Designed for infants aged 6+ months who are teething and chewing on nipples, offering higher tear resistance to prevent bite damage and choking hazards.
Size Specifications
We offer three flow rate variants to match infant feeding stages:
Slow Flow (1 hole, 0–3 months): Delivers 1–2 mL of milk per second, preventing overfeeding and choking for newborns who have not yet mastered sucking rhythm.
Medium Flow (2 holes, 3–6 months): Delivers 3–4 mL of milk per second, matching the faster sucking speed of older infants.
Fast Flow/Variable Flow (Y-cut, 6+ months): Delivers 5–7 mL of milk per second, suitable for thicker liquids such as cereal-infused formula and smoothies, with flow rate adjusting based on sucking pressure.
All variants fit standard 5cm wide-neck baby bottles; custom neck dimensions are available for bulk OEM orders.
Material Grade
Standard Food Grade: Meets all global food contact regulations, ideal for retail consumer use and general feeding applications.
Medical Grade (ISO 13485 Certified): Undergoes additional biocompatibility testing, recommended for hospital use, infants with compromised immune systems, and specialized feeding programs.
Quality Assurance
We implement a 5-stage quality control process to ensure every nipple meets the highest safety and performance standards:
Raw Material Inspection: Every batch of LSR raw material is tested for purity, heavy metal content (lead, cadmium, mercury, arsenic < 0.1 ppm), and BPA content before entering production.
In-Process Monitoring: Automated sensors monitor molding temperature, pressure, and curing time for every production cycle, with real-time rejection of parts that fall outside parameter ranges.
Post-Production Testing: Each batch undergoes 10+ performance tests, including tensile strength testing, tear resistance testing, 200-cycle sterilization stability testing, anti-colic valve leak testing, and bite resistance testing (simulating 10,000 chewing motions from teething infants).
Third-Party Certification: All products are annually tested by SGS, Intertek, and other independent third-party laboratories to verify compliance with FDA, EU, and Chinese food safety standards, as well as biocompatibility requirements.
Traceability: Every nipple has a unique lot number printed on its packaging, allowing full traceability from raw material batch to end customer. We offer a 30-day no-questions-asked return policy for any product with manufacturing defects, backed by a 1-year quality warranty against material and workmanship failures under normal use.
Our production facilities are certified under ISO 9001, ISO 13485 (medical device quality management system), and GMP (Good Manufacturing Practices) for infant care products, ensuring consistent quality across every production run.
