Produced by Xiangchu Rubber, these food-grade liquid silicone baby alphabet building blocks are soft, bite-resistant, odorless and non-irritating to skin. They are chewable and boilable for sterilization, help babies develop cognitive ability, meet safety requirements and support customization.
Material
Food-grade LSR
Hardness
Shore A 30-40
Temperature
Certifications
Applications
-40°C ~ +200°C
Colors
Black, White, Transparent, Customizable
# Food-grade LSR Baby Alphabet Building Blocks
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Food-grade Liquid Silicone Rubber (LSR) baby alphabet building blocks are soft, safety-focused early educational toys designed for infants and toddlers aged 3 months to 3 years. Manufactured by 橡楚（湖北）橡胶有限公司 at our facility in 湖北省鄂州市鄂城区经济开发区凡口街道内河巷54号, these building blocks are produced from 100% pure food-grade liquid silicone rubber, meeting global safety standards for infant products. Unlike traditional wooden or hard plastic building blocks that pose choking and injury risks, our LSR blocks combine soft impact absorption with durable shape retention, making them ideal for young children who are teething or still developing fine motor control.
Each block features raised, textured uppercase alphabet letters on multiple faces to support sensory development and early literacy introduction. The closed-cell structure of LSR makes these blocks non-porous, resistant to moisture and microbial growth, and easy to fully sanitize—addressing a key pain point for caregivers of young children who frequently put toys in their mouths. Our blocks are free of BPA, phthalates, lead, PVC, and other harmful additives common in lower-cost infant toys, prioritizing infant safety without compromising on educational functionality.
These blocks are produced via precision liquid injection molding, with strict process controls to ensure consistent quality:
As an LSR specialist manufacturer, we source only virgin food-grade LSR material with no recycled silicone content, which eliminates the risk of leaching harmful substances even when infants chew or suck on the blocks for extended periods. The material complies with FDA 21 CFR 177.2600 food contact standards and EU Regulation 10/2011 for plastic food contact materials, making it safe for direct contact with infant mouths. Unlike silicone blocks produced with lower-quality general-purpose LSR, our 25 Shore A food-grade material remains stable and non-toxic through repeated sterilization.
With a 25 Shore A hardness, our blocks strike the ideal balance between softness and shape retention. The low hardness means the blocks are soft enough to absorb impact if a child falls on the toy, prevents oral injury during chewing, and is gentle on developing teeth and gums. At the same time, the material maintains sufficient rigidity to hold the block shape and support stacking, so children can still develop spatial reasoning and fine motor skills through play. The raised textured letters also provide gentle sensory stimulation for developing tactile senses.
The non-porous closed-cell structure of LSR prevents liquid, food residue, and bacteria from penetrating the block, making it far easier to sanitize than porous wooden or foam blocks. Blocks can be cleaned with hot soapy water, boiled, steamed, or put in a dishwasher for full disinfection, with no degradation, discoloration, or warping after repeated sterilization. LSR material resists tearing and abrasion better than low-cost soft rubber, so the blocks will not crack, peel, or crumble even with years of regular use by young children.
We use only food-grade, highly stable inorganic pigments for letter and block coloration. Unlike organic dyes that fade or leach over time, our pigments are bonded directly into the LSR matrix during molding, so color will not transfer to a child’s skin or mouth, and will not fade even after repeated exposure to high heat during sterilization.
Food-grade LSR baby alphabet building blocks are designed for multiple use cases across early childhood development:
We offer our baby alphabet blocks in the industry-standard 25 Shore A hardness as our primary offering, which is recommended for most use cases. This hardness is optimal for teething and general play: it is soft enough for safe chewing, but rigid enough to support stacking. For customers seeking slightly firmer blocks for older toddlers (2+ years), we can also produce custom hardness ranges between 20 Shore A and 30 Shore A upon request.
Our standard alphabet block set is available in one primary size optimized for small infant hands: 5 cm (2 inch) cube, which is large enough to eliminate choking risk for children 3 months and older, and small enough for infants to grasp and manipulate. Custom size adjustments can be accommodated for bulk orders to meet specific retail or institutional requirements. All standard blocks meet global toy size requirements for non-choking hazard for children under 3 years.
Our food-grade LSR baby alphabet blocks are only produced with our highest-grade food-grade virgin LSR material. We do not offer lower-cost general-purpose LSR or recycled LSR for this product line, as we prioritize infant safety above all. All batches of material are tested for harmful substance content before production to ensure compliance with global food contact and toy safety standards.
橡楚（湖北）橡胶有限公司 operates a quality management system certified to ISO 9001, with strict quality control checks at every stage of production, from raw material incoming inspection to finished product packaging. Each production batch of food-grade LSR baby alphabet blocks undergoes third-party testing for harmful substance content, physical performance, and compliance with global toy safety standards (ASTM F963, EN 71-1/2/3) before shipment.
All our LSR products are produced in our dedicated manufacturing facility located at 湖北省鄂州市鄂城区经济开发区凡口街道内河巷54号, where we maintain separate production zones for food-grade and industrial-grade LSR products to avoid cross-contamination. For bulk orders or custom inquiries, please contact us at 1807111144 or email churubber@163.com.
