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Composite Molding

For the infusion and prepreg methods, alongside resin additives, WACKER also supplies silicone rubber grades and fabrics for the production of vacuum bags.These bags can be placed quickly and securely over the mold before each part is produced. Repeated, time-consuming sealing with conventional vacuum film is no longer necessary. Bags made with rapid-curing, two-part ELASTOSIL® silicone rubber guarantee more processing runs, fewer vapors and more flexibility.

Large number of reproductions: the bags (approx. 4x3 m) can be rolled up for transportation and used again and again. This bag has already beed used 250 times.

From aeronautic, through transportation to consumer goods, many application areas are now unimaginable without fiber-reinforced plastic composites. WACKER silicone rubbers and fabrics for re-usable vacuum bags improve the composite resin infusion molding process. These silicone bags are placed quickly and securely over the mold before each part is produced. Repeated, time-consuming sealing with conventional vacuum film is no longer necessary.

Benefits of Silicone Bag Technology:

  • Faster production
  • Better repeatability and quality
  • Lower emissions of volatile components
  • Less waste
  • Less labor intensive

Benefits of ELASTOSIL®:

  • Flexible
  • Yet self-leveling
  • Longer pot life and curing time
  • Suitable for large surfaces
  • Suitable for vertical surfaces
  • Reusable

Silicones are also used for the production of wedges or bladders, used to apply pressure to the composite during the manufacturing process. Re-usability and release properties together with good chemical resistance are the key advantages here.

Produktempfehlungen

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Produkte
Technische Daten
Produktmerkmale
Viscosity, dynamic Tear strength Hardness Shore A Tensile strength Elongation at break Beständigkeit Oberflächeneigenschaft Regulatorisch Rheologie Vernetzungseigenschaft
CENUSIL® M 830 A/B 8000 mPa·s[1] 8000 mPa·s[1] > 20 N/mm[3] > 20 N/mm[3] 26[4] 26[4] 5 N/mm²[6] 5 N/mm²[6] 500 %[8] 500 %[8] Beständigkeit gegenüber Beton - Lebensmittelkontakt Fließfähig kein chemischer Schrumpf, zweikomponentig, Additionsvernetzend
ELASTOSIL® C 1200 A/B 20000 mPa·s[1] 20000 mPa·s[1] 25 N/mm[3] 25 N/mm[3] 25[4] 25[4] 5 N/mm²[6] 5 N/mm²[6] 500 %[8] 500 %[8] Beständigkeit gegenüber Polyester, Beständigkeit gegenüber Epoxidharzen - - Fließfähig kein chemischer Schrumpf, zweikomponentig, Additionsvernetzend, Schnelle Aushärtung bei Raumtemperatur
ELASTOSIL® M 4601 A/B 15000 mPa·s[2] 15000 mPa·s[2] > 30 N/mm[3] > 30 N/mm[3] 28[5] 28[5] 6.5 N/mm²[7] 6.5 N/mm²[7] 700 %[9] 700 %[9] Beständigkeit gegenüber Gießharzen - Lebensmittelkontakt Fließfähig kein chemischer Schrumpf, zweikomponentig, Additionsvernetzend
ELASTOSIL® M 4642 A/B 20000 mPa·s[2] 20000 mPa·s[2] > 30 N/mm[3] > 30 N/mm[3] 37[5] 37[5] 7 N/mm²[7] 7 N/mm²[7] 480 %[9] 480 %[9] Beständigkeit gegenüber Gießharzen - - Fließfähig kein chemischer Schrumpf, zweikomponentig, Additionsvernetzend
ELASTOSIL® M 4670 A/B 120000 mPa·s[2] 120000 mPa·s[2] 15 N/mm[3] 15 N/mm[3] 55[4] 55[4] 5.5 N/mm²[6] 5.5 N/mm²[6] 280 %[8] 280 %[8] Beständigkeit gegenüber Polyester, Beständigkeit gegenüber Epoxidharzen, Beständigkeit gegenüber PU Trockene Oberfläche Lebensmittelkontakt Fließfähig kein chemischer Schrumpf, zweikomponentig, Additionsvernetzend
ELASTOSIL® RT 625 A/B 25000 mPa·s[2] 25000 mPa·s[2] 30 N/mm[3] 30 N/mm[3] 25[4] 25[4] 6.5 N/mm²[6] 6.5 N/mm²[6] 600 %[8] 600 %[8] - - - Fließfähig zweikomponentig, Additionsvernetzend
Legend
[1] Viscosity, dynamic | 23 °C | ISO 3219,  [2] Viscosity, dynamic after stirring | 23 °C | ISO 3219,  [3] Tear strength | ASTM D 624 B,  [4] Hardness Shore A | DIN ISO 48-4,  [5] Hardness Shore A | ISO 868,  [6] Tensile strength | ISO 37 type 1,  [7] Tensile strength | ISO 37,  [8] Elongation at break | ISO 37 type 1,  [9] Elongation at break | ISO 37