Food-grade Liquid Silicone Keyboard Protector Dustproof Waterproof Cover

Product Overview

The Food-grade Liquid Silicone Keyboard Protector Dustproof Waterproof Cover is a high-performance peripheral protection solution engineered from medical and food-contact grade liquid silicone rubber (LSR), designed to extend keyboard service life while maintaining typing comfort and hygiene compliance. Unlike traditional thermoplastic polyurethane (TPU) or polyvinyl chloride (PVC) keyboard films, this product is formed via precision injection molding under high-temperature and high-pressure conditions, delivering a seamless, form-fitting design that matches the key layout of 99% of mainstream desktop, laptop, and industrial control keyboards on the market.

Core selling points include 100% food-contact safety certification, 360° dust and liquid barrier performance, ultra-low typing interference, and 5+ years of durable use without yellowing or deformation. The product retains the natural tactile feedback of silicone, with a micro-matte surface treatment that reduces glare and fingerprint accumulation, making it suitable for both office, industrial, and food service scenarios where hygiene and equipment durability are core requirements. It is also fully reusable, supporting repeated disinfection with alcohol, high-temperature steam, or medical grade disinfectants without performance degradation.

Technical Specifications

Material Properties

Physical Performance

Process Parameters

Product Advantages

1. Industry-leading Food Safety and Hygiene Performance

Unlike ordinary TPU keyboard films that may release plasticizers and odors at high temperatures, this LSR keyboard protector passes global food contact safety certifications, making it safe for use in food processing lines, commercial kitchens, and catering front desks where staff may switch between handling food and operating keyboards. The inherent antibacterial properties of platinum-cured LSR inhibit the growth of common surface bacteria, reducing cross-contamination risks, and the non-porous surface prevents food residues, grease, and saliva from seeping into the keyboard gap, enabling one-step wipe disinfection.

2. Zero Compromise on Typing Experience

The 0.18mm ultra-thin design and 35A shore hardness balance barrier performance and tactile feedback: the key cavities are precision molded to match the 3D contour of each key, eliminating key sticking, mis-typing, or the "floating film" sensation common with thicker PVC protectors. The micro-matte surface reduces glare under office lighting, while the low-friction coating supports fast, quiet typing with no sticky residue even after long hours of use.

3. Extreme Durability and Long Service Life

The high-strength LSR formulation delivers 7.5MPa tensile strength, allowing the protector to be stretched repeatedly to 5 times its original size without deformation or tearing, making it easy to install and remove without damage. The 1000-hour UV yellowing resistance ensures it remains transparent and aesthetically consistent for 5+ years of use, unlike TPU protectors that typically yellow and become brittle after 6-12 months of exposure to sunlight and office heat. The 1 million keystroke abrasion resistance ensures the key labels remain legible even in high-frequency use scenarios such as industrial control rooms and call centers.

4. All-round Environmental Adaptability

The wide operating temperature range of -40°C to 230°C makes the protector suitable for extreme environments: it remains flexible and does not crack in cold storage facilities operating at sub-zero temperatures, and does not soften or release harmful substances in high-temperature catering kitchens or outdoor workstations exposed to direct sunlight. It also supports repeated high-temperature steam sterilization, making it suitable for medical and laboratory environments where strict hygiene protocols are required.

Applications

1. Food and Beverage Industry: Used for order management keyboards in fast food restaurants, coffee shops, and catering chains; production line control keyboards in food processing plants, where contact with food ingredients, grease, and cleaning agents is common. The food-grade certification eliminates contamination risks, and the waterproof design allows for direct wipe-down during cleaning shifts.
2. Medical and Healthcare Settings: Used for nurse station workstations, medical equipment control keyboards, and laboratory operating terminals, where regular disinfection with alcohol or sterilizing agents is required. The biocompatible material avoids skin irritation for medical staff with frequent contact, and the dustproof barrier prevents pathogen accumulation in keyboard gaps.
3. Industrial and Manufacturing Scenarios: Used for HMI (Human-Machine Interface) keyboards in factory workshops, warehouse management terminals, and construction site portable computers, where exposure to dust, metal shavings, cutting fluids, and hydraulic oil is common. The tear-resistant material and chemical resistance extend keyboard service life by 3-4 times compared to unprotected devices.
4. Office and Education Environments: Suitable for shared office keyboards, public computer room terminals, and student laptop keyboards, reducing cross-contamination risks between users. The ultra-thin design does not affect typing speed for office workers and students, and the fingerprint-resistant coating maintains a clean appearance even with high-frequency shared use.
5. Outdoor and Special Scenarios: Used for field operation laptops, marine control keyboards, and outdoor self-service kiosks, where exposure to rain, sand, and UV radiation is common. The wide temperature tolerance and UV resistance prevent cracking or yellowing in harsh outdoor conditions.

Selection Guide

Hardness Selection

• 30A Soft Version: Recommended for users who prioritize typing softness and noise reduction, suitable for home offices, libraries, and other quiet environments. It provides a cushioned typing feel and reduces keystroke noise by up to 30% compared to unprotected keyboards.
• 35A Standard Version: The universal option balancing tactile feedback and durability, suitable for most office, commercial, and industrial scenarios. It matches the natural key feel of most mechanical and membrane keyboards, with minimal typing interference.
• 40A Wear-resistant Version: Recommended for high-frequency use scenarios such as call centers, industrial control rooms, and public terminals, where the higher hardness improves abrasion resistance and extends service life by 20% compared to the standard version.

Size Specifications

• 11-14 inch Laptop Universal Version: Fits most mainstream laptops with key pitch between 18mm-19mm, including models from Apple, Lenovo, Dell, HP, and Huawei. Custom cut versions for specific model layouts are also available for order.
• 15-17 inch Laptop/Full-size Desktop Version: Fits full-size keyboards with 104/108 keys and a numeric keypad, with a total length of 440mm ± 10mm and width of 140mm ± 5mm.
• **Custom Industrial Version: We provide custom molding services for non-standard keyboard layouts, including industrial HMI keyboards, medical device keyboards, and self-service terminal keyboards, with a minimum order quantity of 500 pieces for custom sizes.

Material Grade

• Food-grade Standard Version: The default option, meeting FDA and EU food contact standards, suitable for most commercial, office, and food service scenarios.
• Medical-grade Enhanced Version: Passes ISO 13485 medical device material certification, with enhanced bacterial inhibition and disinfection resistance, suitable for hospital operating rooms, sterile laboratories, and other high-hygiene requirement environments.
• Flame-retardant Industrial Version: Added halogen-free flame retardant components, meeting UL94 V-0 flame retardant standards, suitable for power plants, chemical plants, and other industrial scenarios with fire safety requirements.

Quality Assurance

All Food-grade Liquid Silicone Keyboard Protectors are manufactured in ISO 9001, ISO 14001, and ISO 13485 certified production facilities, with a three-layer quality inspection process before leaving the factory:

1. Raw Material Inspection: Each batch of LSR raw material is tested for food contact compliance, heavy metal content, and physical performance parameters, with unqualified raw materials rejected for production.
2. In-process Inspection: 100% of semi-finished products are inspected for size tolerance, key cavity matching, and surface defects, with products with positioning deviation exceeding 0.05mm or surface scratches/bubbles rejected.
3. Finished Product Inspection: Each batch of finished products undergoes random sampling for water resistance, abrasion resistance, and disinfection tolerance testing to ensure performance meets published specifications.

The product comes with a 2-year limited warranty covering manufacturing defects, yellowing, tearing, and deformation under normal use conditions. All products are accompanied by a third-party test report for food contact safety and physical performance, which can be provided to customers for regulatory compliance purposes upon request.