Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Materials Features
- Advantages
Duro-Bond Neoprene sheet lining may be applied to a variety of surfaces and in various thicknesses. Precured Neoprene lining does not require equipment for vulcanization. It can be used to line tanks and trenches in which steam or hot air curing is impractical. Uncured Hypalon is applied while in the soft, prevulcanized state. It readily conforms to curved surfaces and can be easily applied to complex shaped equipment before it is vulcanized. When properly applied and cured, Duro-Bond Neoprene sheet lining exhibits excellent adhesive bond strength. On blasted steel the 90o peel-pull adhesion is in excess of 25 pounds per inch width in accordance with ASTM D903.
- Chemical Resistance
The maximum temperature for which Duro-Bond Neoprene is recommended is 220oF (105oC). In elevated temperatures elastomers will harden and age prematurely, resulting in cracks and lining failure. It is sometimes desirable to provide thermal insulation, thereby increasing the service life of the lining. Corrosion resistant red shale or carbon brick are generally used for this purpose. One or more courses of brick bonded with one of the Electro Chemical corrosion resistant cements may be required to obtain the desired temperature reduction.
Applications & Uses
- Applications
- Plastics & Elastomers End Uses
- Uses
Duro-Bond Neoprene is used as a lining material for resistance to chemical agents and abrasion. It is used for lining equipment such as concrete and steel tanks, agitators, shafts, and troughs.
- Application
The installation of Precured Duro-Bond Neoprene elastomeric sheet lining is carried out as follows:
1. On metal surfaces sand or grit blast the areas to be lined to a gray-white metal. For concrete substrates acid washing is required in lieu of sand or grit blasting.
2. Apply one coat of adhesive primer cement immediately after blasting metal to prevent rusting. On concrete the primer should be applied after the acid washed surfaces are dry. Apply additional coat of primer cement, if necessary.
3. Apply required coats of intermediate or tie cement, allowing sufficient drying time so that the coat being applied does not lift up the preceding coat.
4. Apply the specified thickness of Precured Duro-Bond Neoprene using the minimum number of sheets and splices consistent with good lining practice. Edges of sheets overlap approximately 2" unless restricted by dimensional tolerances. Lining sheets are washed with recommended solvent and allowed to dry before application. During application, sheets are rolled and all seams and corners carefully stitched to eliminate all trapped air between lining and cemented surfaces so there is full contact with all cemented areas.
5. Edges of all sheets are skived at a 45o minimum angle from the top surface to the bottom of the sheet. A closed skive construction commonly known as down skive is used wherever Possible. Open skived splices may be used when specified
The installation of Uncured Duro-Bond Neoprene elastomeric sheet lining is carried out as follows:
1. The metal surfaces are sand or grit blasted to a gray-white metal. Special care is taken to insure that the metal is free of all mill scale, rust formations, oil and grease.
2. One coat of primer is applied immediately after blasting metal to prevent rusting. Additional coats of primer are applied if necessary.
3. The required coats of intermediate or tie cement are applied allowing sufficient drying time so that the coat being applied does not lift the preceding coat
4.Edges of all sheets are skived at an angle from the top surface to the bottom of the sheet. A closed skive construction commonly known as a down skive is used wherever possible. Open skived splices may be used when specified.
5. The uncured sheet is wiped with the recommended solvent and allowed to dry before application. The sheet is then applied using the minimum number of seams consistent with good lining practice. Edges of sheet should over lap approximately 2" unless restricted by dimensional tolerances. During application, sheets are rolled and all seams and corners carefully stitched to eliminate all trapped air between lining and cemented surfaces.
6. Steam curing is required to vulcanize Uncured Duro-Bond Neoprene to produce the required physical and chemical properties and adhesion to the metal substrate- Method of Testing
All lined surfaces are inspected for blisters, lifted edges at seams and surface defects. Any special dimensional tolerances required, after lining, are also checked. All areas are then spark tested for leaks using a dielectric spark tester adjusted to 5000 volts. The tester is moved constantly and quickly over the lining surface to prevent a burn through.
- Repair Procedure
Most defects will be blisters between lining and substrate, blow holes where the lining is actually ruptured, small cracks in the lining or physical damage which may result in a scuffed or broken lining. In general, if such a defect occurs, the defective lining is removed to a point where firm adhesion to the substrate is found, a suitable repair made with the same or equivalent lining material (usually a precured sheet) and subsequently testing the repaired areas as described in "Method of Testing".
Properties
- Color
- Physical Form
- Physical Properties
| Value | Units | Test Method / Conditions | |
| Specific Gravity (precured) | approx. 1.40 to 1.43 | — | — |
| Tensile (precured) | min. 1800 | psi | — |
| Elongation | min. 300 | % | — |
| Hardness Shore "A" | approx. 60 ± 10 | — | — |
| Water Absorption (immersion for 4 days at 212°F) (by volume) | max. 15 | % | — |
| Flammability | Burns, however, does not support combustion. | — | — |
| Finish | Buffed | — | — |
| Thickness | 1/16", 1/8", 3/16" and 1/4" | — | — |
| Abrasion Resistance | Excellent | — | — |
| Weathering Resistance | Excellent | — | — |
| Ozone Resistance Hours (1200°F over 300 hours meets requirements for Class E) | 100 ppm | — | ASTM D-2000 |
| Specific Gravity (uncured) | approx. 1.49 | — | — |
| Tensile (uncured) | min. 1200 | psi | — |
Technical Details & Test Data
- Service Temperature
The maximum temperature for which Duro-Bond Neoprene is recommended is 220°F (105°C). In elevated temperatures elastomers will harden and age prematurely, resulting in cracks and lining failure. It is sometimes desirable to provide thermal insulation, thereby increasing the service life of the lining.