Overview
Blank plaster bases are specialized adhesive backings designed to carry medicinal compounds in transdermal patches, particularly in traditional Chinese medicine (TCM). They serve as the foundational layer for pain relief patches, herbal extract applications, and other therapeutic systems. These bases are engineered for optimal skin adhesion while allowing controlled release of active ingredients. They are typically made from medical-grade fabrics or polymer films coated with hypoallergenic adhesives to minimize skin irritation during prolonged wear.
Physical and Chemical Properties
Blank plaster bases exhibit consistent thickness (usually 0.1–0.3 mm) and tensile strength to withstand movement without撕裂. The adhesive layer maintains tackiness across body temperatures (32–40°C) while resisting moisture from sweat. Chemically inert, the materials resist interactions with herbal compounds or synthetic drugs. Breathability varies by design—cotton-based versions allow higher air permeability than polyurethane films, which may be preferred for waterproof applications.
Main Applications
Primary use cases include TCM herbal patches for musculoskeletal pain management, where the base carries powdered or extracted herbs like aconite or myrrh. Modern applications extend to ketoprofen or lidocaine patches in Western medicine. In cosmetics, blank bases deliver transdermal nutrients (e.g., collagen patches). Some manufacturers utilize them for diagnostic purposes, such as sweat pH monitoring strips adhering to skin during athletic activities.
Safety and Storage
Medical-grade blank plaster bases must pass ISO 10993 biocompatibility tests. Storage requires protection from humidity (recommended RH <60%) to preserve adhesive properties. Bulk rolls should be kept sealed with desiccants. Users with sensitive skin should opt for bases with acrylic adhesives rather than rubber-based variants. Patch removal techniques matter—peeling slowly parallel to the skin reduces trauma compared to quick upward pulls.
B2B Procurement Guide
When sourcing blank plaster bases, prioritize suppliers with GMP certification for medical materials. Key specifications to request include: adhesive duration (typically 8–72 hours), breathability rate (g/m²/24h), and elongation at break (%) For large orders (10,000+ units), negotiate MOQs and lead times—custom die-cutting shapes or printed backing layers may add 2–3 weeks to production. Sample testing should verify non-slip performance during movement and residue-free removal.
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