PVC Fabric Tech Specs

Fabric Information:

We use German HEYtex PVC fabric 0.9mm Mare 1050 in all Saturn boats starting from 2020.

• coating: PVC
• weight: 1050 g/m² (31 oz/yd²)
• tensile strength: 3000/3000 N/5 cm (343/343 lbs/inc)
• thickness: 0,9 mm (35 milli-inch)

Seam Construction Methods:

Since July 2021, all SD boats and RD rafts feature heat-welded seams. For SK KaBoats and kayaks with pointed ends, we use hand-glued seams. The pointed design and smaller tube diameter of these models make it impractical for a welding roller to navigate the seam area.

There are two primary methods for constructing inflatable boat seams: heat welding and hand gluing. A common misconception is that "hand-glued" PVC seams differ significantly from "welded" seams. In reality, hand-glued PVC seams are technically solvent-welded, while the alternative method involves heat welding. Both processes achieve a comparable fusion of the PVC material.

Contrary to popular belief, glue does not serve as a barrier between two PVC layers. Instead, its primary function is to dissolve the adjacent PVC surfaces, effectively melding them together—much like the heat welding process.

Heat-welded seams offer superior performance in environments with high temperatures and humidity, such as the Caribbean, South America, or Central America. It's important to differentiate between glued seams on PVC boats and those on rubber (Hypalon/Neoprene) boats, as they involve distinct bonding technologies.

It is important to note that any manufacturer claiming to produce fully heat-welded pointed-end inflatables is not providing accurate information. While the majority of seams may indeed be heat welded, the pointed end of the boat—where the welding roller cannot physically pass—must still be hand glued. This limitation is inherent to the construction process of inflatable boats with narrow or tapered ends, regardless of the brand or manufacturing technique used.

Hand-Glued Seams (PVC):

• Strength/Bond Type: Strong — Chemical/Molecular bond
• Durability: Good
  • Historical issues with older PVC boats delaminating have been resolved for over a decade.

Heat-Welded Seams (PVC/Polyurethane):

• Strength/Bond Type: Strong — Molecular bond
• Durability: Superior
  • Ideal for hot and humid environments, providing enhanced longevity and performance.

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PVC Fabric vs. Hypalon:

PVC:

• Pros:

  • Significantly less expensive than Hypalon.

• Cons:

  • Does not last as long in direct sunlight as Hypalon, especially if left unprotected.
  • Prolonged exposure to direct sunlight can cause the fabric to become sticky and discolored over time.

• Storage Recommendations:

  • Store in a well-ventilated, shaded area when not in use.
  • Avoid storing in closed containers, boxes, or unventilated spaces under direct sunlight.
  • Excessive heat and humidity can degrade the chemical bond of the PVC glue, weakening seam integrity.

Hypalon:

• Pros:

  • Offers significantly better durability than PVC when exposed to prolonged direct sunlight.

• Cons:

  • Considerably more expensive than PVC.

Key Takeaway: While PVC is a cost-effective option, it requires protective measures such as boat covers or UV sprays to enhance longevity in sunny conditions. Hypalon is the preferred choice for extended sun exposure but comes at a higher price. Proper storage and maintenance practices are crucial for maximizing the lifespan of PVC inflatable products.

Considerations When Choosing Between PVC and Hypalon Inflatable Boats:

1. PVC Boats:
   • Durability in Sunlight: PVC is a viable option unless the boat is stored outside and unprotected throughout the entire summer, year after year.
   • Occasional Use: If the boat is only used occasionally (e.g., weekends or vacations), sunlight exposure is not a significant concern.
   • Protection Measures:
     • Using a sun/rain cover when the boat is not in use.
     • Applying UV protective spray periodically.
     • Regularly covering the boat can significantly extend its lifespan.
   • Cost Advantage: PVC boats offer a more attractive price point, providing excellent value if proper care is taken.

1. Hypalon Boats:
   • Higher Cost: Expect to pay 50% to 75% more for a Hypalon inflatable boat compared to a similarly sized and equipped PVC model.
   • Superior UV Resistance: Ideal for scenarios involving prolonged exposure to sunlight, particularly if the boat will not be covered or protected when not in use.
   • Best Use Case:
     • Suitable for leaving an uncovered dinghy on a dock or in the water year-round (365 days a year).
     • Recommended for long-term, low-maintenance durability in harsh sun-exposed environments.

Bottom Line: PVC is a cost-effective choice for most recreational boaters who are willing to take simple protective measures. However, for long-term, continuous exposure to the elements without protection, investing in a Hypalon boat could provide better long-term value.