Slitting, sheeting, and die-cutting for industry applications
The initial stage of release liner production involves coating paper or film substrates with silicone or other release agents. These materials are produced in large master rolls, typically measuring several feet in width and thousands of feet in length. While large rolls are ideal for high-volume applications, most converting customers require smaller, more manageable formats tailored to their specific manufacturing processes.
This is where finishing processes come into play. The goal is to ensure release liners are cut, shaped, and packaged in formats that optimize their usability for various industries, whether in the form of slit rolls or sheets, that then can be more easily managed or further finished into die-cut components.
Fox River Associates started in 1990 with a simple concept in mind. We serve a void in the market by offering an alternative to the industry’s large release liner suppliers by providing specialized paper release liners and film release liner for customers – in the quantities needed, when they need it.
For more information about Fox River Associates and how we can help you grow your business, use the form on this page or message us at info@foxriverassociates.com and our experienced team will contact you.
Slitting: Precision Cutting for Custom Roll Widths
What is Slitting?
Slitting is one of the most common finishing processes for release liners. It involves cutting the master roll into narrower rolls to meet customer specifications. This process is performed using specialized slitting machines that employ rotary or razor blades to make precise cuts.
Types of Slitting Techniques
- Razor Slitting: Ideal for thin film liners such as PET and PP. It provides a clean, precise cut without generating dust or fraying the edges.
- Shear Slitting: Used for thicker materials like poly-coated kraft (PCK) paper and heavier film liners. It employs two rotating knives to make the cut.
- Score (Crush) Slitting: A technique that uses a dull blade to crush and break through the material. This is less common for release liners due to the potential for rough edges.
Applications of Slit Rolls
Slit release liners are commonly used in:
- Medical Industry: Narrow rolls of release liners are used in transdermal patches and wound care applications.
- Industrial Tapes: Manufacturers require precisely slit rolls to match the width of adhesive-coated tapes.
- Labels and Graphics: Pressure-sensitive label production benefits from slit release liners that align with printing and die-cutting equipment.
Sheeting: Converting Rolls into Custom-Sized Sheets
What is Sheeting?
Some industries require release liners in sheet format rather than continuous rolls. Sheeting involves cutting large rolls into flat sheets of a specified size using guillotine cutters or precision die-cutting equipment.
Benefits of Sheeting
- Provides easy handling and stacking for applications where sheets are preferred over rolls.
- Ensures uniform sizing for downstream processes such as laminating or stamping.
- Reduces waste by eliminating the need for additional cutting during use.
Applications for Sheet Formats
- Medical Applications: Die-cut sheets are commonly used for silicone gel sheets, surgical dressings, and diagnostic test strips.
- Automotive and Aerospace: Pre-cut release liner sheets are used for composite materials and adhesive-backed insulation.
- Graphic and Signage Industry: Large format printing applications require sheets of release liners for decal and vinyl applications.
Packaging and Shipping: Ensuring Quality During Transit
After finishing, release liners are carefully packaged to prevent damage and contamination. Packaging considerations include:
- Core Size & Winding Tension: Ensuring rolls maintain proper shape and do not deform during storage.
- Protective Wrapping: Using plastic wrap or kraft paper to protect against dust and moisture.
- Custom Palletization: Ensuring materials arrive at the converter’s facility in optimal condition.
Converting Finishing Process
Die Cutting: Precision Shaping for Specific Applications
What is Die Cutting?
Die cutting involves using a custom-shaped blade to cut release liners into specific shapes or patterns. This process is essential for industries that require pre-cut liners to match the shape of their adhesive products.
Types of Die Cutting
- Flatbed Die Cutting: Uses a steel rule die to stamp out shapes from sheets of release liner material.
- Rotary Die Cutting: A high-speed process that uses cylindrical dies to cut continuous rolls of material.
- Laser Cutting: A newer technology that offers precise cutting without physical blades, ideal for intricate patterns.
Industries That Use Die-Cut Release Liners
- Electronics: Die-cut liners are used for adhesive-backed components in smartphones, tablets, and other devices.
- Medical Adhesives: Custom-cut liners ensure efficient application of medical tapes and bandages.
- Aerospace & Automotive: Used in gasketing and sealing applications where precise liner shapes are needed.
Perforating and Scoring: Enhancing Usability
Perforating
Perforating involves creating a series of small cuts in the release liner, allowing for easy tearing at predetermined intervals. This is useful in applications where sections of the liner need to be removed quickly and efficiently.
Scoring
Scoring creates a crease in the liner, making it easier to fold or bend without fully cutting through the material. This is commonly used in:
- Folded Medical Dressings: To facilitate easy removal of the liner without damaging the adhesive.
- Industrial Labeling: To allow partial peeling of a label backing.
Custom Coatings and Printing for Identification
Some customers require additional coatings or printing on their release liners to enhance functionality.
Coatings
- Anti-Static Coatings: Reduce static electricity build-up, essential in electronic and medical applications.
- Barrier Coatings: Improve moisture or chemical resistance for demanding environments.
Printing
Many release liners are printed with branding, instructions, or batch identification information. This is especially common in:
- Medical Applications: Ensuring compliance with regulatory requirements.
- Industrial and Consumer Labels: Facilitating product identification and usability.
Packaging and Shipping: Ensuring Quality During Transit
After finishing, release liners are carefully packaged to prevent damage and contamination. Packaging considerations include:
- Core Size & Winding Tension: Ensuring rolls maintain proper shape and do not deform during storage.
- Protective Wrapping: Using plastic wrap or kraft paper to protect against dust and moisture.
- Custom Palletization: Ensuring materials arrive at the converter’s facility in optimal condition.
Let's Get Started
The finishing of release liner materials is a critical step in ensuring these products meet the specific needs of various industries. Whether through slitting, sheeting, die-cutting, or other converting processes, these operations transform large master rolls into user-friendly formats tailored to medical, automotive, graphics, and industrial applications. By understanding these finishing techniques, converters and end-users can optimize their adhesive applications for maximum efficiency and performance.
Call 1-800-647-6579 or use the form on this page. We’re ready to work with you.
