Multiple Materials used for Optimum Performance
APR offers multiple types of foam, rubber, felt, plastic, or composite materials in various thicknesses, densities and colors for the broadest range of products available to meet specific customer requirements. We have many success stories of finding a better sealing materials or more cost effective solution with similar sealing results than some of the O.E.M. end seals such as molded rubber items.
APR End Seal Material Selection Guide
With continuous research and field testing, APR has developed a customized solution-oriented product line of end seal materials and configurations that are capable of advancing almost any press chamber's end seal performance. Through a custom diagnosis and a range of over 25 different material solutions, APR can determine the best end seal for any given condition or ink/chamber/press combination.
| Felt | Wool Content | Shore A Hardness | Vibration Absorption | Abrasion Resistance & Durability |
|---|---|---|---|---|
| F-1 White | 95% | 30-40 | High | Excellent |
| F-3 Grey | 85% | 30-40 | High | Excellent |
| F-5 White | 95% | 20-30 | Medium | Good |
| F-7 Grey | 80% | 20-30 | Medium | Good |
| Foam | Density (lbs/cu. ft.) | Type | Description | Abrasion Resistance & Durability |
|---|---|---|---|---|
| White Foam (CF) | 2 | Cross linked polyethylene | Soft to medium | Good |
| White Foam (WF) | 4 | Cross linked polyethylene | Medium firmness | Very Good |
| Blue Foam (BF) | 4 | Cross linked polyethylene | Medium firmness | Very Good |
| Grey Foam (VHGF) | 5.5 to 6.5 | Cross linked polyethylene | Extra firm | Very Good |
| Grey Foam blend (HGF) | 4 | Cross linked polyethylene | Medium firmness | Very Good |
| Black Neoprene (BN) | Neoprene | Good solvent resistance | Excellent | |
| Gray EPDM (G257) | EPDM | Good solvent resistance | Excellent | |
| B65 | 33 | Natural Rubber | Good solvent resistance | Excellent |
| Black Neoprene Blend (BKF) | 8 | Neoprene/EPDM/SBR | Good solvent resistance | Excellent |
| Black Neoprene Blend (SBKF) | 4 | Neoprene/EPDM/SBR | Good solvent resistance | Excellent |
| Plastic | Type |
|---|---|
| LDPE | low density poly |
| HDPE | high density poly |
| NN | nylon |
Lubricated Felt End Seals
APR utilizes a unique process to fully saturate felt end seals (highly recommended) with a very safe and effective high quality petroleum jelly material. This same material is used in cosmetics, hair care products, animal feed supplements and complies with USP requirements and FDA requirements as per 21 CFR 172.880. MSDS sheets are available upon request.
More about End Seals from APR.