Medical Lidstock Introduction

Product Overview

Medical lidstock is a critical component of the Sterile Barrier System (SBS), designed to seal thermoformed trays and ensure the sterility of medical devices throughout sterilization, transit, and storage. We offer a comprehensive range of die-cut lidstock solutions utilizing Tyvek®, medical-grade paper, and aluminum foil. All products are manufactured in strict compliance with ISO 11607 and EN 868 standards, serving Class II and Class III medical device packaging applications.

Core Materials and Features

Tyvek® Lidstock

Manufactured by DuPont™, Tyvek® is a spunbonded high-density polyethylene material that sets the industry standard for medical lidstock. Its unique continuous-fiber structure provides exceptional physical strength and a superior microbial barrier.

Superior Puncture Resistance: Test results demonstrate that Tyvek® offers up to 6 times the puncture and tear resistance compared to medical-grade papers of equal or greater basis weight, significantly reducing the risk of package failure from sharp device edges and rough handling.

Broad Sterilization Compatibility: Compatible with all major sterilization methods including Ethylene Oxide (EtO), Gamma, E-beam, Steam (under controlled conditions), and Low-Temperature Plasma, while maintaining color, flexibility, and barrier integrity post-sterilization.

Clean Peel and Low Linting: Compared to medical-grade paper, Tyvek® lidstock provides a clean peel with minimal particle generation, reducing the risk of contaminating the medical device or the sterile field during opening.

Breathability: The porous structure allows for rapid pressure equilibration and minimizes condensation formation caused by temperature fluctuations during transport and storage.

Medical-Grade Paper Lidstock

Medical-grade paper is a widely adopted lidstock substrate, particularly suited for lightweight devices with sharp edges. Coated with advanced adhesives like SealScience or Xhale, paper lidstock provides a reliable seal to rigid or semi-rigid trays.

Sterilization Compatibility: Compatible with EtO, Gamma, and E-beam sterilization.

Application: Ideal for lightweight instruments requiring additional protection from rigid thermoformed trays.

Barrier Foil Lidstock

For medical devices and electronic components highly sensitive to moisture, oxygen, and light, aluminum foil lidstock offers maximum barrier protection.

High Barrier Performance: Effectively blocks moisture vapor, oxygen, and UV light, providing comprehensive protection for sensitive contents.

Sterilization Compatibility: Compatible with Gamma sterilization.

Customizable Sealing Technologies

We employ proprietary SealScience water-based coatings and Xhale hot-melt adhesive technologies, allowing precise control over coating weight and sealing parameters. This ensures a continuous, channel-free reliable seal to various tray materials including PETG, HIPS, PC, PP, and PS. Additional options include blue tint adhesive (for automated equipment detection) and custom printing.

Quality Assurance

All lidstock products are die-cut and converted in controlled cleanroom environments under an ISO 13485 quality management system. Full-process quality control is implemented—from raw material biocompatibility verification to final product seal strength and microbial barrier performance testing.

ock:Balanced air permeability,firm sealing,cost-friendly for standard sterile packaging