Quality Paper Tubes and Cores
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Quality Control


A quality control system is in effect for the control of raw
materials purchased by Yazoo.


   
A system is also in effect for inspecting and testing material during processing. This system provides assurance that the material continues to meet the physical, chemical, functional, visual, and dimensional requirements needed for the customer. Listed below are the specific tests on raw materials and finished products. Detailed information on these tests and quality checks are contained in our "Quality Assurance Manual."

Tests Performed on Raw Materials

- Basis Weight of Paperboard
- Tensile Strength
- Tearing Resistance
- Caliper (thickness of paper)
- Air Resistance
- COBB Test (water absorptiveness)
- Ring Crush (compression resistance)
- Stiffness of Paperboard
- Bursting Strength (mullen)

 

  Testing Done on Finished Tubes and Cores

- Measuring Warpage
- Delamination of Adhesive Bonds due to water immersion
- Delamination of Adhesive Bonds due to high humidity
- Torque Strength
- End-Supported Beam Strength
- Internal Bursting, Small Diameters
- Measuring Moisture Content
- Axial (end to end) Compression
- Measuring Outside Diameters
- Measuring Wall Thickness
- Measuring Flexure Under Side-to-Side
- Compression
- Dimensional Stability
- Measuring Spindle Fit
- End-Supported Beam Deflection
- Side-to-Side Crush
- Measuring Lengths or Heights
- Measuring Inside Diameters

  Inspection Checks and/or Testing of In Process Products

- Mandrel Check
- Specification Sheet Check
- "Square Cut" Check (winders)
- Overlapped Top Ply
- Overlapped Inside Ply
- Glue Seepage (outside)
- Length Check (winders)
- Wall Thickness Check
- Length Check (recutters)
- Inside Ply
- Sawcut (winders)
- Recutter Burrs
- Trim Check (recutters)
- Screwing (recutters)
- Exterior Marks (general appearance)


- Paperboard Check
- Adhesive Check
- Gap Width
- Overlapped Inner Plies or Body Plies
- "Dog Ears" or "Tips"
- Glue Seepage (inside)
- Splice Check
- Dropped Plies
- "Checked or "Cracked" Inside Ply
- Outside Diameter Check
- Wrinkled Tubes or Wrinkled Outside Ply
- Glue Bond or Lamination Check
- Excessive Beveling (recutters)
- Poor Separation of Cuts (recutters)
Yazoo Mills. Inc. P.O. Box 369 New Oxford, PA 17350 | Phone 717-624-8993 | Fax: 717-624-4420 | Toll Free: 1-800-242-5216