The TAPPI Tissue 101 - Properties and Processes Course
November 17-18

Proposed Course Schedule

Course Description: Basis raw materials and physical property relationships are discussed to develop an appreciation of the trade-offs made in designing a tissue product for a specific application.  Each major unit operation of the tissue making process is reviewed to describe key engineering relationships and their effect on final tissue product properties. 

Tuesday, November 17, 2015

8:00am – 8:30am            Section1              

   Welcome, Introductions, Expectations, Course Objective

                                     

8:30am – 9:15am            Section 2              Bruce Janda, InnovaSpec

Introduction to Tissue Business and Products                                                            

a)     North American tissue markets vs. world
b)     Typical products and properties required by customers
c)     Hands-on tissue evaluation including class as organized tissue softness panel

9:15am - 9:30am                                           Break

9:30am - 10:45am             Section 3             Bruce Janda

Web-Fiber Networks and Physical Properties

a)     Formation and anisotropy of machine made paper

b)     Strength/wet strength

c)     Bulk/ absorbency

d)     Softness

e)     Typical physical relationships and trade offs

10:45am - 11:30am            Section 4            Bruce Janda

Fibers and Furnishes Effects on Tissue Properties                                               

a)     Fiber sources and properties (hardwood, softwood)

b)     Pulping processes effects on tissue properties

c)     Recycled fiber and challenges

d)     Other fiber sources (bamboo, non-woody fibers)

11:30am - 12:30pm                                        LUNCH

12:30pm - 1:30pm              Section 5            Bruce Janda

Stock Preparation and Control of Tissue properties                                               

a)     Thick stock systems and flow characteristics
b)     Refining processes
c)     Chemical addition
d)     Basis weight controls
     

1:30pm - 2:45pm               Section 6            Lucyna M. Pawlowska, Kemira

Wet End Chemistry and Control of Tissue Properties                                               

a)     Basic chemistry concepts
b)     Process chemicals
c)     Strength resins
d)     Debonders, softeners
e)     Absorbency aids
f)      Lotions
g)     Adhesives used in converting

2:45pm - 3:00pm                                            Break

3:00pm - 4:00pm             Section 7               Bruce Janda

Forming and Consolidation Processes Effect on Tissue Properties

a)     Forming process measurements
b)     Thin stock delivery systems/piping and flow characteristics
c)     Headbox design for microturbulence and fiber distribution
d)     Cross direction profile management
e)     Jet to wire speed – tissue property orientation
f)      Tissue former designs

4:00pm - 5:00pm             Section 8              

Forming Fabrics Application and Effect on Tissue Properties                                   

a)     Forming fabric terminology and properties
b)     Forming fabric designs
c)     Forming fabric design selection/application
d)     Forming fabric cleaning and conditioning

Wednesday, November 18, 2015

8:00am - 9:15am             Section 9             Bruce Janda

Water Removal and Pressing Processes and Effect on Tissue Properties

a)     Pressing operations for water removal

b)     Press fabric terminology and properties

c)     Press fabric manufacturing

d)     Press fabric design selection/application

e)     Press fabric cleaning and conditioning

9:15am - 10:30am             Section 10            Bruce Janda

  Drying Process and Effect on Tissue Properties

a)      Yankee dryer design, operation, and safety

b)     Cast iron versus stainless steel dryer design

c)     Yankee Hood Systems – High temperature air impingement drying

d)      Steam boxes and IR add-ins

10:30am - 10:45am                                          BREAK

 

10:45am - 11:45am           Section 11            Bruce Janda 

Alternative Processes and Effect on Tissue Properties                                               

a)     Wet crepe process for AFH towels/napkins

i.    Structured tissue processes to reorder physical relationships
ii.    Through Air Drying (TAD, UCTAD)

b)     TAD-like processes
c)      TAD fabric design

11:45am - 12:45pm                                       LUNCH

        

12:45pm - 2:30pm          Section 12            Jeff Peters, BTG

Creping Process and Effect on Product Properties           

a)     Creping doctor blades and geometry

b)     Creping process and product results

2:30pm - 3:00pm                                          BREAK

3:00pm – 4:00pm           Section 13            Lucyna M. Pawlowska

Yankee Adhesion Overview - Dry End Processes and Chemical Additives to Achieve Properties 

a)     Creping process description

b)     Crepe adhesives properties and chemistry

c)     Crepe releases properties and chemistry

d)     Coating effect on creping process and sheet properties

e)     Creping application concepts

f)      Common creping process problems and solutions

g)     Case studies

4:00pm - 4:45pm           Section 14           Bruce Janda

   Dry End Sheet, roll handling and converting to improve/preserve properties

a)     High speed sheet handling/dust control
b)     Tissue calendering
c)     Tissue reel and rewinding processes
d)     Folding processes and sawing
e)     Tissue shipping issues                   

4:45pm - 5:00pm                                       Questions and Course Wrap-Up

5:00pm                                                       ADJOURNMENT