WELA Handelsgesellschaft mbH

PARABEAM spacer fabrics

ParaBeam® spacer fabric 

ParaBeam® spacer fabric

Parabeam spacer fabric consists of two fabric face sheets connected by web threads.

The web threads stand up when the fabric is impregnated with resin.

After curing a very lightweight and strong sandwich structure is obtained that can be used in a wide variety of applications, e.g. in boat building, lorry superstructures, tank linings, etc.

General processing information

ParaGlass
Type Standard width Weight Thickness Roll length  
  mm g/m² mm Linear meter  
Minimum order size: Upon request
ParaGlass 3 1270 780 3,0 39,37 (50 m²) Branche Flugzeugbau Branche Schienenfahrzeuge Branche Bootsbau Branche Automotive
ParaGlass 5 1270 840 5,0 39,37 (50 m²) Branche Flugzeugbau Branche Schienenfahrzeuge Branche Bootsbau Branche Automotive
ParaGlass 8 1270 930 8,0 39,37 (50 m²) Branche Flugzeugbau Branche Schienenfahrzeuge Branche Bootsbau Branche Automotive
ParaGlass 10 1270 1010 10,0 39,37 (50 m²) Branche Flugzeugbau Branche Schienenfahrzeuge Branche Bootsbau Branche Automotive
ParaGlass 12 1270 1054 12,0 39,37 (50 m²) Branche Flugzeugbau Branche Schienenfahrzeuge Branche Bootsbau Branche Automotive

Legend:

  • Branche Flugzeugbau Aircraft construction
  • Branche Schienenfahrzeuge Rail vehicles
  • Branche Windenergie Wind power
  • Branche Bootsbau Boat building
  • Branche Automotive Automotive
ParaTank
Type Standard width Weight Thickness Roll length per carton
  mm g/m² mm Linear meter
Minimum order size: Upon request
ParaTank 3 0635 755 3,0 2 x 47.25 (30 m²) = 60 m²
ParaTank 3 1270 755 3,0 47.25 (60 m²)
ParaTank 4.5 0635 845 4,5 2 x 47.25 (30 m²) = 60 m²
ParaTank 4.5 1270 845 4,5 47.25 (60 m²)
ParaTank 6 0635 905 6,0 2 x 47.25 (30 m²) = 60 m²
ParaTank 6 1270 905 6,0 47.25 (60 m²)
ParaTape
Type Standard width Weight Thickness Roll length per carton
  mm g/m² mm Linear meter
Minimum order size: Upon request
ParaTape 100 630 0,5 10 x 50 (5 m²) = 50 m²

General notes

The viscosity of the laminating resin should lie between 500 and 1000 mPa.s. Extremely low-viscosity resins must be thixotroped to prevent the resin from running from the webs.
The resin content in the spacer fabrics laminate should be at least 50 weight per cent, preferably 60 weight per cent, to achieve good mechanical properties of the sandwich.
(A study on the impact of the resin content on the mechanical properties can be requested, if needed.)

The spacer fabric is impregnated according to known techniques:
manually - pouring, brushing, roll-on / mechanical - spraying or pouring (nozzle or film) or immersion with squeezing.

Following impregnation with resin the spacer fabric expand without auxiliary means to the laminate height provided by the webs as soon as the pressure forces applied by roller or nip roller are removed.

Notes for working with polyester resins

When fabricating spacer fabrics with polyester or vinyl ester resins a styrene emission reducer (e.g. 0.8% BYK S-740) must be mixed in or low styrene emission resins (also called LSE resins) can also be used. Otherwise curing is inhibited through styrene vapour trapped in the cavity. The amount of resin in the webs of the spacer fabric laminate is comparatively low and the exothermic process of the curing reaction is therefore reduced. We recommend choosing a highly reactive resin type, a rapid curing recipe and/or short-term heat application to "jumpstart" curing. The required potlife of the resin can be adjusted, if necessary, using an inhibitor.

Processing technique in manual laminating

  1. Cut the spacer fabrics with hand shears (preferably with micro-serration) or electric shears
  2. Have laminating resin ready, 50 - 70% of the entire resin amount needed for the spacer fabrics.
    It is recommended to apply the spacer fabric layer wet on wet to the previous laminate layer.
  3. Apply the dry spacer fabric without wrinkles and roll down with grooved roller or disk roller. Careful rolling down achieves a uniform bond to the laminate substrate without blemishes. Laminating resin is already drawn into the webs through the capillary forces.
  4. Uniform pressureless application of the remaining laminating resin amount, preferably using a short pile velour roller. The resin is drawn into the spacer fabric after a short time. "Rigorous" rolling is not necessary and may cause wrinkles to form.
  5. Final rolling over the spacer fabric layer with the grooved or disk roller. Rolling should be done gently, with little pressure, preferably in warp direction. The best surface is achieved by slightly positioning the roller at an angle and rolling "against the thread" of the spacer fabric. The roller diameter should be between 30 - 40mm.
  6. Edge finishes can be simply produced by pressing down the spacer fabric layer along the side.
  7. Additional layers (also spacer fabrics) can be laminated wet on wet on the spacer fabric layer; the number of the top layers depends on the height and type of the spacer fabric.

Direct contact person: Benjamin Lange-Engel / ble@wela-handelsgesellschaft.de

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