Thanks to their high flexibility, Ramina’s hot calenders allow a large variety of applications in Nonwovens treatments; in particular, when applied to geotextile lines, they allow at the same time calibration and thermostabilization of the product, thanks to their 2 or 3 oil-heated cylinders.

Their particular engineering ensures the highest temperature & pressure uniformity: the best conditions for hi-tech and hi-quality nonwoven products.

Machine composition:

• Working width: up to 8.000 mm
• Working pressure: up to 100 N/mm
• Calibration accuracy: ± 0.15 mm
• Working temperature: max 250° C
• Heating system: gas boiler or electrical boiler
• Cylinders closing system: pneumatic or hydraulic
• 2 or 3 hot calibration cylinders
• Cross-axis system is used to compensate the deflection of cylinders and get a uniform product calibration: the upper cylinder skewing determines a variation of pressure on the center and is manually or PLC adjustable.
• Compact design
• Possibility to work online (speed determined by the line) or offline (speed set by operator)
• Short installation times due to machine pre-assembly at Ramina

Ramina designs and manufactures complete Spunbond Roofing and Geotextile lines starting from 100% PET polymer or flakes from recycled bottles. The line is used for the production of needle-punched fabrics for geotextile (50-700 gsm) and impregnated fabrics for roofing (80- 350 gsm). The first fabrics are used in road, railway, airport, landfill constructions and civil engineering works. The second nonwovens are used for roof coverings, underflooring, plumbing, and supports for roofing bituminous membranes.

The Spunbond Roofing line by Ramina uses an innovative technology that allows a lower energy consumption resulting in cost saving. In addition, the line is specifically designed to guarantee an easy accessibility for cleaning, extending line uptimes.

With the Spunbond Roofing line by Ramina it is possible to add fiberglass wires in the impregnated fabric for roofing reaching a higher tensile strength and longitudinal resistance.

Ramina designs and manufactures Lamination lines for Composites and Geocomposites.Thanks to its technology it is possible to laminate
up to three layers of many type of nonwovens with PE films, PVC, Geomembrane, Geogrid, Geomat, Geonet, HDPE, LDPE, Clay and other materials. The line can be adapted to laminate other auxiliary materials in order to meet customers’ needs and create a personalized product.

The tunnel oven is a key component for the treatment of nonwovens in thermobonding lines: in these lines the oven thermally fixes the fibers allowing realization of high-quality products with the desired thickness and weight (eg. wadding, insulating panels for building, air filters, etc.).

Air distribution takes place from top to bottom and vice versa, depending on the material to be thermobonded, in both the heating zones and in the cooling zones:especially in the production of wadding it is important that the air is addressed from the bottom to maintain its high-loft property.

The air is distributed in a perfectly uniform way thanks to the use of double perforated-sheet balance chambers, so that the air, heated by the burner and sent to the chamber by a fan, compresses with uniform pressure over the entire surface before exiting the perforated panel and going through the material under treatment.

Machine composition:

• Working width: up to 4200 mm
• Basic weight: 100 - 6000 g/m²
• Input product thickness: up to 1500 mm
• Output product thickness: 5 - 500 mm
• Output product density: 8 – 300 kg/m³
• Working temperature: 250°C
• PLC-controlled temperature, max. difference ± 1°C
• Working speed: up to 100 m/min
• Modular construction, 4,30 m long hot modules and 2,15 m long cold modules

• 120 mm rockwool insulation panels
• Air-inlet balance-chambers, guaranteeing a perfect air distribution
• Product ventilation can be automatically addressed from bottom to top and vice-versa

Type of heating:

• air-vein burners
• electrical exchangers
• steam exchangers
• thermal oil exchangers

• Teflon upper and lower conveyor belts
• Air-suction width adjustment with Teflon shutters
• Belt-cleaning brushes
• Air-cooling with fans
• Suction exhauster
• Separation cylinder

Thanks to their high flexibility, Ramina’s hot calenders allow a large variety of applications in Nonwovens treatments; in particular, when applied to geotextile lines, they allow at the same time calibration and thermostabilization of the product, thanks to their 2 or 3 oil-heated cylinders.

Their particular engineering ensures the highest temperature & pressure uniformity: the best conditions for hi-tech and hi-quality nonwoven products.

Machine composition:

• Working width: up to 8.000 mm
• Working pressure: up to 100 N/mm
• Calibration accuracy: ± 0.15 mm
• Working temperature: max 250° C
• Heating system: gas boiler or electrical boiler
• Cylinders closing system: pneumatic or hydraulic
• 2 or 3 hot calibration cylinders
• Cross-axis system is used to compensate the deflection of cylinders and get a uniform product calibration: the upper cylinder skewing determines a variation of pressure on the center and is manually or PLC adjustable.
• Compact design
• Possibility to work online (speed determined by the line) or offline (speed set by operator)
• Short installation times due to machine pre-assembly at Ramina

Ramina designs and manufactures complete Spunbond Roofing and Geotextile lines starting from 100% PET polymer or flakes from recycled bottles. The line is used for the production of needle-punched fabrics for geotextile (50-700 gsm) and impregnated fabrics for roofing (80- 350 gsm). The first fabrics are used in road, railway, airport, landfill constructions and civil engineering works. The second nonwovens are used for roof coverings, underflooring, plumbing, and supports for roofing bituminous membranes.

The Spunbond Roofing line by Ramina uses an innovative technology that allows a lower energy consumption resulting in cost saving. In addition, the line is specifically designed to guarantee an easy accessibility for cleaning, extending line uptimes.

With the Spunbond Roofing line by Ramina it is possible to add fiberglass wires in the impregnated fabric for roofing reaching a higher tensile strength and longitudinal resistance.

Ramina designs and manufactures Lamination lines for Composites and Geocomposites.Thanks to its technology it is possible to laminate
up to three layers of many type of nonwovens with PE films, PVC, Geomembrane, Geogrid, Geomat, Geonet, HDPE, LDPE, Clay and other materials. The line can be adapted to laminate other auxiliary materials in order to meet customers’ needs and create a personalized product.