Complete Grooving Capabilities. spreading circumferential dewrinkling herringbone non-slip lateral fluted tracking spiral/worm air elimination

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1 Whether your challenge is process, environment, the web or any combination of these... Process vertical webs high speed spreading double-sided coatings low wrap high tension low tension wrap angle light load spreading and wrinkling stretching Environment clean room dusty/dirty environment food grade high moisture corrosive environment limited space to fit idler elevated temperatures submersed web Web Characteristics brittle fragile sensitive web coated abrasive contaminated lightweight low tensile strength... there s a custom solution at Webex. WebSpreader Idlers A new standard for grooved rubber-covered idlers designed to effectively reduce or eliminate web wrinkling The grooved rubber-covered WebSpreaders remain one of the most cost effective and frequently used solutions to web wrinkling. These idlers are covered with a rubber elastomer and are precision machined with angled, outward spiraling grooves across the roll surface. There are different elastomers available for use, each with different physical properties such as solvent resistance, heat resistance, and hardness. In addition, various groove patterns are available to meet your specific application needs. Our Customer Support Specialists can help you determine which elastomer and groove pattern is best for your specific application (see Elastomer Specifying Guide at the end of this section). Use the specification and pricing information on the following pages to order your WebSpreader idlers if you already know which elastomers and rolls you want. Narrow down the possible solutions and options before spending a dime. Call and talk to one of our Customer Support Specialists. Their experience in solving hundreds of other web handling problems will prove invaluable in guiding you to an effective and cost-efficient solution. Complete Grooving Capabilities spreading circumferential dewrinkling herringbone non-slip lateral fluted tracking spiral/worm air elimination Whatever your need there s a good chance Webex has already engineered a solution. Call us!

2 W Wrinkles are caused by a variety of factors. Wrinkling is one of the most common web-handling problems in the industry today. Yet, there are numerous approaches to eliminating or minimizing them. That s why we ve standardized a full line of idlers specifically suited to de-wrinkling. However, the ideal solution can vary from one application to the next, as well as point to point along the process line. To get the best possible results, discuss your needs and specs with our Customer Support Specialists. We ll share over 50+ years of web handling experience to help you get the right roll the first time. 3 Common Solutions to Web Wrinkling Machine Alignment One of the most common causes of web wrinkles is poor machine alignment or bad roll geometry. When addressing a wrinkle problem, you should first verify that your rolls are cylindrical and aligned within tolerances appropriate for your web material. The application of web spreading or wrinkle removal rolls is not appropriate until roll alignment has been ruled out. Reverse Taper Rollers Also referred to as concave, reverse crown or bow tie rolls. These idlers are machined with increasing diameters at the outer edges. This profile creates a surface speed differential at each different roll diameter. The resulting tension differential, or higher edge stress, ultimately results in the material climbing outward toward the larger diameters at the roll ends. Let Webex help you determine which groove pattern and elastomer type is best suited to your particular application. For example, the Quad-X WebSpreader is especially ideal for nonwovens, textiles, paper and film. This idler is machined with quadgrooves that run progressively deeper as they travel toward each end of the roll. Silicone covered WebSpreaders can withstand high ozone environments as well as temperatures up to 500º F. Silicone rubber coverings are nonmarking and possess excellent web release properties. PVC Nitrile covered WebSpreaders are more econmical and also non-marking, capable of withstanding temperatures up to 250º F, and offer superior abrasion resistance. Web tension and wrap angle are critical to creating the traction needed for reverse taper rolls to be totally effective. The amount of taper or crown is also dependent upon the application. Reverse taper rolls are cost effective web spreading devices and can also be effectively applied anywhere in the line as general idler rollers. WebSpreaders These anti-wrinkle rolls can influence your web in various ways, including stretching it, spreading it, or allowing the web to lay flat and simply not induce wrinkles in the first place. Look over the information on WebSpreader Idlers in this section. If you have any doubt regarding your roll specifications, call us. Prices are F.O.B. Neenah, WI. Prices subject to change without notice. Delivery from stock based on prior commitments. This revision effective 7/01/00. Fax:

3 2" 3" 3" WebSpreader MODEL GR /4" 2" diameter steel core, rubber covered to 3.00" diameter 0.75" diameter dead shaft Visit our web site for all your roller needs

4 W 3" 4" 4" WebSpreader MODEL GR " 3" diameter steel core, rubber covered to 4.00" diameter 1.00" diameter dead shaft Prices are F.O.B. Neenah, WI. Prices subject to change without notice. Delivery from stock based on prior commitments. This revision effective 7/01/00. Fax this page with your order Fax:

5 4" 5" 5" WebSpreader MODEL GR /2" 4" diameter steel core, rubber covered to 5.00" diameter 1.50" diameter dead shaft Visit our web site for all your roller needs

6 W 5" 6" 6" WebSpreader MODEL GR " 5" diameter steel core, rubber covered to 6.00" diameter 2.00" diameter dead shaft Prices are F.O.B. Neenah, WI. Prices subject to change without notice. Delivery from stock based on prior commitments. This revision effective 7/01/00. Fax this page with your order Fax:

7 RUBBER-COVERED IDLERS 6" 7" 7" WebSpreader MODEL GR " 6" diameter steel core, rubber covered to 7.00" diameter 2.00" diameter dead shaft Visit our web site for all your roller needs

8 W Elastomer Selection Guide Note: Any of the rolls in the Idler Master Catalog can be Rubber-Covered to meet process needs.the appropriate selection of a rubber cover is important to the success of many process applications. The following is a summary guide to a few of the most popular choices of rubber elastomers used in the web converting industry. For specific strengths and weaknesses of each elastomer, refer to the polymer properties chart. NEOPRENE: Neoprene is considered a good choice SILICONE: Silicone rubber is known for two main for general purpose applications. It has good mechanical attributes, high temperature (500º F) capability and properties, good chemical resistance and high resilience. improved release characteristics. Silicone is a more Neoprene is a workhorse in the industry. It is used on nip expensive covering but along with heat resistance and rolls, pull rolls, feed rolls and in flexo and gravure printing. release it has good chemical resistance and excellent ozone resistance. Silicone has generally weak physical NITRILE: Also known as NBR or Buna-N, Nitrile is characteristics but is widely applied in situations where the most commonly used elastomer in the industry. its temperature and release characteristics are needed. It has good resistance to oils, chemicals and water. Nitrile is also a workhorse covering with applications as nip rolls, EPDM: Sometimes called EPT, EPDM consists mostly of pull rolls and rolls in printing applications. Carboxilated Ethylene and Propylene. It has excellent ozone resistance Nitrile is a modified Nitrile rubber, possessing most of and chemical resistance, especially with polar solvents the properties of Nitrile along with outstanding abrasion such as keytones. EPDM is also heat resistant to 350º F. resistance and other physical characteristics, including It is typically used where its chemical and temperature tensile strength. Nitrile/PVC blends are also very popular capabilities are required such as coating applications. in the web converting industry. The addition of PVC enhances the physical properties, abrasion resistance, HYPALON: Hypalon has good physical characteristics, strength, chemical and ozone resistance of Nitrile. good chemical resistance, excellent ozone resistance and good temperature (350º F) capability. Hypalon is ideal for POLYURETHANE: Urethane rubber is available in many roller applications and is a favorite as a covering two basic chemical types, polyester and polyether. Polyester for nip rolls. urethane is a tough elastomer with good chemical and solvent resistance while polyethers work better in VITON: Viton is known for its excellent chemical applications that come in contact with water. Urethane resistance and high temperature (500º F) capability. Viton is typically used in applications where toughness, wear is very expensive so its applications are limited to extreme resistance and cut resistance are desired. Urethane cases where other compounds fail and the high price can generally has high-friction characteristics making it be justified. a favorite for pull rolls. Prices are F.O.B. Neenah, WI. Prices subject to change without notice. Delivery from stock based on prior commitments. This revision effective 7/01/00. Fax this page with your order Fax:

9 RUBBER-COVERED IDLERS RELATIVE RATING Excellent Above Average Average Fair Poor NEOPRENE NITRILE CARBOXYLATED NITRILE POLYURETHANE SILICONE EPDM HYPALON VITON Hardness Range Tensile Strength Modulus Elongation at Break Tear Strength Cut Resistance Resistance to Compression Set Resistance to Permanent Set Resilience Resilience to Heat Build-up Resistance to Abrasion Ozone Resistance Hydrolytic Stability Dielectric Strength Release Characteristics Maximum Service Temperature (º F) Acids (Mineral) Nitric, Sulfuric Hydrochloric, Phosphoric (Organic) Acetic, Boric Caustics Sodium Hydroxide, Calcium Hydroxide Aliphatic Hydrocarbons Kerosene, Gasoline, Hexane, Naphtha, Mineral Spirits, Most Offset/Letterpress Printing Inks, Many lubricants and greases Aromatic Hydrocarbons Toluol or Toluene, Xylol or Xylene Chlorinated Hydrocarbons Methylene Chloride, 1, 1, 1- Trichloroethylene, Perchloroethylene Esters Ethyl Acetate, Dioctyl Phthalate, Tricresyl, Phosphate Alcohols Methanol, Ethanol, Isopropyl Alcohol Water Glycols Ethylene Glycol, Glycerine Ketones Methyl Ethyl Ketone (MEK), Methyl Isobutyl Ketone How to specify the right elastomer Use this elastomer chart to help determine which rubber compound is best suited to your particular situation. If in doubt, call us. We ll help you determine the best possible covering based on the web handling parameters you have to share with us. How to specify the right grooved rubber roll The Idler Master Catalog presents four different groove configurations for the standard rubber-covered idlers. Other options are also available, including additional groove variations and non-groove designs. To specify the best possible groove or rubber roll design, call us. Chances are we ve already designed a rubber-covered roll for an application similar to yours.