Since 1970, Sun Process Converting, Inc. has been a leading provider of custom coating and converting services for a wide range of pressure sensitive materials.  Our capabilities include industrial roll slitting and rewinding services for industries such as aerospace, construction, medical, and many more.  Our various slitting methods, combined with our material expertise, and full line of advanced machinery allows us to provide cost effective solutions that meet strict quality requirements.

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Our precision slitting services guarantee a high degree of accuracy and versatility providing rolls in virtually any width and length which can be used for assembly, label stock, decorative trim and much more.

We keep above average tolerances which ensures that our slit materials can meet any critical dimension requirements.  We can provide slit widths as narrow as .0625” up to 80” wide for material thicknesses from .5 mils to 50 mils.  Our rolls have a maximum diameter of 40” and a maximum weight of 1,500 lbs.  Our standard core sizes are either 3” or 6” and have the option for other core sizes which are available upon request.  The materials that we work with include, but are not limited to:

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Slitting and Rewinding

  • Adhesive Tapes
  • Industrial Aluminum Foil
  • Cloths
  • Cork
  • Felt
  • Foam
  • Paper
  • Pressure Sensitive Products
  • Stainless Steel
  • Masking
  • Medical
  • Teflon
  • VHB

We employ a variety of slitting and rewinding methods, which include:

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Score cuts, otherwise known as crush cuts, use a dull knife to crush the material against a flat surface and sever it.

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Rotary shear slitting processes use a mold slide plate and a cutting table along with longitudinal and transverse motorized cutting devices to create highly precise cuts.  This efficient and reliable process is ideal for cutting sheet material.

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Razor slitting is similar to scoring but uses a much sharper blade that cuts material above a groove or in the air rather than against a flat surface.  Because the razor is sharp, it can create precise, narrow cuts.  This method works best with light and non-abrasive materials that won’t dull the blade.

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Single knife slitting machines use a stationary blade and a hydraulically powered feed of material to slit and rewind the product.  It can work with most rolled plastics, tapes, films, or natural materials.

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Some materials respond poorly to tension, which can lead to stretching or imprecise cuts during both the slitting and rewinding processes.  Zero tension machines can minimize the wound-on tension to zero or near-zero levels.

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Shear slitting uses two rotary knives at once to cut material, producing the same effect as a pair of scissors.  This process is ideal for heavier paper, foil, laminates, and films.

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Perforation processes cut through material by punching or stamping through it with enough force to cut it.  This process can create holes or decorative images.

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Spool winding processes direct slit films and other rollable substrates around a circular spool.  We use state-of-the-art equipment to wind long lengths of material with precision so the slit product is undamaged and secure during storage.

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Surface winders use cylinders to help guide sheets of material into place around a spool or to unspool material for controlled applications and cutting.

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Roll defects are often caused when the winding is soft or imprecise near the core.  We start every winding process with an accurate core and precisely chosen tension levels.

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We serve clients in a diverse range of industries, including:

  • Aerospace
  • Automotive
  • Appliance
  • Biotechnology
  • Construction
  • Distribution
  • Electrical
  • Home Furnishing
  • Medical
  • OEM
  • Packaging
  • Pharmaceutical
  • Printing
  • Recreational

Our team can help recommend the right slitting and rewinding methods for any material to ensure the best outcome for your project.

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At Sun Process Converting, we are committed to quality.  Our company is ISO 9001:2015 certified, and we maintain a rigorous quality control process to ensure every project meets its specifications.  We have also adapted our processes to use safe practices for our team, our clients, and our products during the COVID-19 pandemic.  For more information, or to get started on your slitting and rewinding solution, contact us today.


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Slitting & Rewinding Methods
  • Score
  • Shear
  • Rotary
  • Perforating
  • Razor Slitting
  • Single Knife
  • Zero Tension Slitting
  • Core Winding
  • Spool Winding
  • Film Rewinding
  • Surface Winding
Slitting Specifications
  • Minimum Slit Width: .0625″
  • Maximum Slit Width: 80″
  • Minimum Material Thickness: .5 mil (.0005″)
  • Maximum Material Thickness: 50 mil (.050″)
  • Maximum Roll Diameter 40″
  • Maximum Roll Weight: 1,500 lbs
  • Core Diameter: 3″ and 6″
Materials
  • Adhesive Tapes
  • Industrial Aluminum Foil
  • Cloths
  • Cork
  • Felt
  • Foam
  • Paper
  • Pressure Sensitive Products
  • Stainless Steel
  • Masking
  • Medical
  • Teflon
  • VHB
Industry Focus
  • Aerospace
  • Automotive
  • Appliance
  • Biotechnology
  • Construction
  • Distribution
  • Electrical
  • Home Furnishing
  • Medical
  • OEM
  • Packaging
  • Pharmaceutical
  • Printing
  • Recreational
Industry Standards
ANSI – American National Standards Institute
AS – Aerospace Industry Standard
ASME – American Society of Mechanical Engineers
ASTM – American Society for Testing and Materials
CSA – Canadian Standards Association
DOT – Department of Transportation
FAA – Federal Aviation Administration
FDA – Food And Drug Administration
ISO 9001:2015 – International Organization for Standardization
Mil-Spec Military Specifications
NADCAP – National Aerospace And Defense Contractors Accreditation Program
QS – QS Is a quality standard developed by the Automotive Industries
RoHS – Restriction Of Hazardous Substances (Compliant)
SAE – Society of Automotive Engineers
TS – Technical Specifications, used with ISO