In the leather tanning process, the sammying machine (or dewatering machine) plays a pivotal role. It is the critical bridge between the "wet blue" stage and the subsequent drying and finishing phases. The heartbeat of this machine is the sammying felt belt.For tannery managers, the choice of felt is not just a procurement decision; it is a quality control decision. A low-quality felt belt leads to uneven moisture removal, grain damage on high-end hides, and frequent, costly replacements.At ANNILTE, with 17 years of specialization in industrial belt engineering, we have developed a series of endless felt belts specifically designed to meet the rigorous demands of global tanneries. Here is how we solve the industry’s most persistent dewatering challenges.

1. Maximizing Water Extraction Through Advanced Capillary Engineering

The primary function of a tannery sammying belt is to absorb and drain water from wet hides under immense pressure. If the felt is too dense, it won't absorb; if it’s too loose, it won't provide the necessary pressure.

The ANNILTE Technical Solution: We engineer our felts with an Optimized Capillary Structure. By precisely controlling the needle-punching density, we create a belt that facilitates rapid water absorption and even faster drainage.

• The Result: Higher dewatering efficiency means less time in the drying tunnels, leading to significant energy savings and faster production cycles for your tannery.

2. Dimensional Stability: Ending the Nightmare of Belt Stretching

Sammying machines operate under heavy hydraulic pressure. Standard felt belts often suffer from "elongation fatigue," where the belt stretches and narrows over time, leading to tracking issues and uneven pressing.

The ANNILTE Technical Solution: We incorporate a Multi-layered Internal Reinforcement Core combined with our proprietary HST (Heat Setting Technology).

• High Tensile Integrity: Our belts are pre-stressed and heat-stabilized to ensure near-zero elongation during their entire service life. This "Locked-in" dimensional stability means the belt maintains its original width and thickness, providing consistent pressure across the entire hide.

3. Protecting the Grain: The "Zero-Marking" Surface

For premium leathers, the surface quality is everything. Seams or irregularities in the felt belt can leave permanent marks on the delicate grain of the leather, significantly reducing its market value.

The ANNILTE Technical Solution: ANNILTE sammying belts are manufactured using Seamless Endless Technology.

• Uniform Softness: There are no joints, seams, or weak points. The surface is treated to achieve a perfect balance of firmness (for dewatering) and softness (to protect the grain). This ensures that even the most sensitive skins are processed without a single mechanical mark.

4. Chemical and Abrasion Resistance for Harsh Environments

Tannery environments are chemically aggressive, containing chrome, tannins, and various acids. Furthermore, the physical abrasion from raw hides can quickly wear down inferior fibers.

The ANNILTE Technical Solution: We use a high-performance blend of Premium Wool and High-Tenacity Synthetic Fibers (such as specialized Nylon and Polyester).

• Chemical Shield: Our fiber blend is selected for its natural and engineered resistance to tanning chemicals.
• Wear Resistance: The high synthetic content significantly increases the belt's resistance to physical abrasion, extending the replacement interval by up to 30-50% compared to standard wool-heavy belts.

5. HST Technology for Precision Tracking

A sammying belt that runs off-center can damage the machine's rollers and the leather itself. Tracking issues are often a result of non-uniform density within the felt.

The ANNILTE Technical Solution: By using automated Needle-Punching Precision Lines, we ensure that the density of the felt is uniform to within a fraction of a percent across the entire surface. Combined with HST Secondary Setting, we eliminate the internal stresses that cause a belt to "snake" or deviate. Your maintenance team spends less time adjusting the machine and more time producing leather.