Calenders for non wovens

Heating cylinders

Transfer printing

 

Calenders for Non Wovens

LEMAIRE has developed a line of calenders for the treatment of non wovens.

Calenders for the consolidation of non woven sheets after carding, napping and needling

Calenders for calendering process and treatment of the non woven sheets for a skin surface effect (feltisation)-

 

 Back to TOP

 

Heating Cylinders

 

Lemaire has 25 years of technical know-how and experience behind its precision heat cylinders. This has permitted it to be leading suppliers to numerous and diverse industries that use its products in their process.

PERFORMANCE

A temperature of 250C and over, a precision and a reliability of +/-1%

RANGE

 

Standard diameter :

350 mm - 500 mm - 800 mm - 1000 mm - 1500 mm.

Upon estimate diameter that is not standard :

over 1500 mm

Length :

2060 mm - 2460 mm - 2760 mm - 3640 mm - 4400 mm - 5500 mm

Upon request these cylinders can be covered with :

Hard chromium-plating, teflon, anti-adherent, etc.
Or can be fitted with various paddings.

Furthermore we can supply them with various accessories, especially :

- Temperature regulator
- route cylinders
- pressure cylinders
- controls
- transmission system
- conveyor belts with guiding system.

 

 Back to TOP

 

Transfer Printing

 

Transfer printing was discovered in 1957 by a gentleman called NOL DE PLASSE who worked for the company LAINIRE DE ROUBAIX in the North of France.

He understood that the dyes could pass directly from a solid to a gaseous state when brought to a temperature above 190C (370F). This change is termed sublimation and is the basis of transfer printing, also known as dry printing.

Synthetic fibres for transfer printing.

The most popular fibre for transfer printing is polyester.

Polyester blends, Nylon 6.6, Acrylic and triacetate can be printed as well.

A transfer printing calender is the most popular way to perform this process. The calender has a heated cylinder around which the fabric to be printed is passed. The fabric is supported by a continuous blanket giving a close sandwiching of the paper between the fabric and the heated cylinder. This then allows the transfer of heat to both the fabric and paper and the paper to release the disperse dyes to sublimate.

The cylinder radius and its contact with the sandwiched paper and fabric gives a dwell time to the process. Obviously the sublimation process takes a certain amount of time to occur and it is generally recognized that the optimum dwell time to achieve complete exhaustion of the disperse dyes onto the fabric is in the range of 15-30 seconds.

 

Advantages of transfer printing

 

As once can see the process of transfer printing for the fabric printer is very simple, all the problems of printing the design in the first place are given to the transfer paper manufacturer. What are the other advantages :
- Capital investment is low compared to other printing processes
- No auxiliary equipment
- Small floor space required
- No pollution or effluence
- Efficient energy consumption
- Clean process with limited machine maintenance
- Minimum semi skilled labour required
- Limited stock of printed cloth
- Transfer paper readily available from numerous
   manufacturers worldwide
- Sample paper lengths available in 5 meters
- Immediate change over from design to design on the calender
- Ability to rapidly respond to clients demand

LEMAIRE calenders are renown for their reliability and for their innovations. We manufacture a range of machines with different cylinder diameters denoting the speed of production. Furthermore, we offer a variety of working widths from 1800 mm for standard fabric to 3200 mm for wide width fabrics and sometimes up to 5000 mm for floor coverings.

Heating cylinder diameter

500 mm (20")

Working widths available

1800 mm (72"), 2200 mm (88"),2500 mm (100"), 3200 mm (132")

Production speed

140 to 350 meters per hour

Heating cylinder diameter

800 mm (32")

Working widths available

1800 mm (72"), 2200 mm (88"),2500 mm (100"), 3200 mm (132")

Production speed

250 to 620 meters per hour

 

 

Heating cylinder diameter

1000 mm (40")

Working widths available

1800 mm (72"), 2200 mm (88"'),2500 mm (100"'), 3200 mm (132")

Production speed

304 to 760 meters per hour

 

 

Heating cylinder diameter

1500 mm (60")

Working widths available

1800 mm (72"), 2200 mm (88"),2500 mm (100"), 3200 mm (132")

Production speed

600 to 1200 meters per hour

 

 The Double Dispensing System (D.D.S.)

This system is designed to permit synchronized wide width transfer printing up to 3.20 m of various substrates (non woven materials, films, woven fabrics, warps) using two rolls of heat transfer papers of the same design and matching these designs across the width.

There are 2 dispensing units controlled independently.
 

Each one features
- an air expanding shaft
- 2 mobile bearing housings
- One pneumatic brake controlled by a precision valve
- A positive drive assembly for lateral movement of the
  assembly

The two heat transfer paper rollers are guided :

- laterally by 2 photo-electric cells for the paper edge
  guidance
- longitudinally by a photo-electric cell to read the
  registration marks on the edge of the paper (to join the
  designs).

The information read by the photoelectric edge guidance system is transmitted to the microprocessor control, which analyses and activates the correction movements of the assembly along the width or the length appropriately.

 

 

 Warp Transfer Printing

The LEMAIRE process of warp transfer printing can be applied to a wide range of yarn counts, although the best results are achieved when printing 100 to 300 denier polyester.
The yarn can be filament, texturized spun, etc.

Of course, a precise control of tension and alignment is crucial to maintain the warp quality. The warp printing machine is a beam to beam system. The specially designed control system monitors and maintains level tension between let-off and printing, and again between printing and rerolling. Alignment is also monitored by a photoelectric system.

The advantage of warp printing is that from one warp print an infinite number of designs can be produced. Firstly you may vary the weave on the warp to change the fabric. Secondly you can vary the colour of the colours in the filling therefore giving different colourways and bring out different hues in the warp print. Thirdly you can vary the type of yarns used in the filling, inserting fancy yarns etc.

 

 Pile Fabric Printing

 

One of the great interests currently is the possibility to print the pile fabrics such as flocked or velours fabrics. The "coupling system" available on LEMAIRE machines eliminates excess pressure and torque which otherwise cause the pile fibers to lie down. A dense pile of less than 4 millimetres (0,16 inches) pile height gives the best results.

Longer dwell time, not higher temperature is important for thorough penetration. Brushing up is also helpful to regain pile height.

 

 Back to TOP