ULMA Sienna Flow Pack Wrapper (HFFS)
The ULMA Sienna is a horizontal flow pack wrapper (HFFS) that produces three-seal pillow packs, designed especially for irregular or difficult-to-handle products. It's a well-regarded machine in food packaging — particularly for produce, meat, and cheese — but also used for non-food applications like gloves and household items.
Model Variants
The Sienna comes in several configurations. The naming convention breaks down like this:
LS — Longitudinal Seal (standard fin seal along the bottom)
SP — Single Point (single cross-seal jaw set)
BI — Bi-directional / Box-motion jaw (as opposed to rotary)
The Sienna LS SP BI would be a standard fin-seal machine with a single cross-seal station using box-motion jaws.
Key Technical Features
Feature Detail
Drive system Independent servo motors, electronically synchronized
Frame Stainless steel, cantilever design
Cross-seal jaws Box-motion type, 400 mm wide
Sealing head Independent motor for flexible cycle optimization
Infeed conveyor 2 meters, full stainless steel
Control Touchscreen HMI with per-product recipe storage
Safety functions No Product–No Bag; Misplaced Product detection (standard)
Film unwinding Motorized, with easy-load reel holder
Optional Configurations
Shrink film (polyolefin)
Mixed film — BOPP and shrink in one machine
LDPE (low-density polyethylene) version
Various infeed conveyor lengths and types
Printing/date-coding integration
Typical Applications
Produce, meat, cheese, baked goods, and non-food items like gloves, trash bags, and household products. The cantilever frame design is particularly valued in food environments because it eliminates ledges where debris can accumulate and makes washdown cleaning straightforward.
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