1 / 16

Multibase TPE & TPV

Multibase TPE & TPV. Styrenic Based Thermoplastic Vulcanizates (Dynamic Crosslinking). Thermoplastics – Silicone (Thermoplastic and Silicone Combinations). TPSiV™ Siloxane Masterbatches Silicone modified TPE (SiE). Multiflex ® TEV (SEBS modified & crosslinked based TPV).

karah
Télécharger la présentation

Multibase TPE & TPV

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Multibase TPE & TPV

  2. Styrenic Based Thermoplastic Vulcanizates(Dynamic Crosslinking) Thermoplastics – Silicone(Thermoplastic and Silicone Combinations) • TPSiV™ • Siloxane Masterbatches • Silicone modified TPE (SiE) • Multiflex® TEV (SEBS modified & crosslinked based TPV) Thermoplastic Elastomers(TPE Physical Blends) Thermoplastic Olefins(Polyolefin based compounds) • Multiflex® TES (SEBS & SBS based TPE) • Multiflex® TEA (TPE Alloys) • Multipro® • Multibatch® • Multiflex® TPO • Multiflex® TEO Technical Platforms

  3. Automotive Thermoplastic Applications Exterior Cowl screen seal Weather-strip Mud flaps Step pads Light seals Acoustic barriers Interior Air Bag Covers Door and IP Skins Shift Boots Shift knobs Steering wheels Tray Liners Soft Touch handles Window/door seals Arm rests ABC pillars Floor mats Powertrain & Support Systems Engine covers Gaskets (i.e. HAVC seals) Hose jacketing Bellows

  4. AutomotiveMarket Thermoplastic Elastomers for interiors and exteriors of automobiles for soft touch, aesthetics, insulation, safety, comfort, and ergonomics

  5. Air Bag-New Materials • Several new materials (both TPO and TES) are in process for OEM approvals • -35C with window for US, French & Italian OEMs • -35C in chamber for German & Asian OEMs • Improved MIC appearance for DAB

  6. Air Bags -New Materials, Cont. • Specific attention is being given to the robustness of the material with many different tear seam configurations and cover geometries • Recent trials have proven very good welding performance to IP substrates

  7. Air Bag -New Grades • Multi-flex TPO 4204 SW, -30C with window • Multi-flex TPO 3202 ST2, -30C in chamber • Multi-flex TES 2502 SI1, -35C in chamber • Multi-flex TES 2205 S1, -30C with window • Multi-flex TES 2604 MI1, -35C in chamber, MIC • High Fluidity : Melt Flow Index13(same to A9702MR HF) • Low Gloss Level : max 2.5(specified at Toyota)

  8. Understanding the Nomenclature • S = Standard • W = Window • I0 = -30C in Chamber • I1 = -35C in Chamber • MW = Mar (MIC) Window • MI1 = Mar -35C in chamber

  9. Typical Properties (TES 2604 MI1)

  10. Considerations in Molding : MIC • Material temperature • MIC : 250 ~ 260℃ • Painting : 220 ~ 235℃ • Mold Temperature • MIC : 50℃( Fixed side), 30℃(Moving side) • Painting : 30~40℃(Fixed), 20℃(Moving side)

  11. Considerations in Molding : MIC • Injection speed / Screw speed • MIC : 50 ~ 70 % • High shear rate permits a good fluidity in the tool and particularly the flow-ability on tear line. • Painting : 40 ~ 50 % • Holding Pressure • MIC / Painting : as low as possible to avoid too many stress on parts. A degressive profile is also recommended to good apperance.

  12. Considerations in Tooling : MIC • Runners • Typical sections are discs(4~8 mm diameter) or trapeziums • To easy flow and ejection, the runner surface should be smooth. • Hot runner contours should be smooth to avoid material stagnation at high temperature and then degradation.

  13. Considerations in Tooling : MIC • Gates • Location • The gate should be located in the portion of the cover where you have the largest surface of material. • The gate should be located furthest away from the tear seam to avoid early pressure peak during the filling causing glossy tear seams and also preferable to locate them in ribs if possible. • U or H tear line design, it is recommended to avoid injection point at 3H or 9H position, in this case, the material needs to cross 2 tear lines, which slows down and freezes the material and creates pressure peaks.

  14. Considerations in Tooling : MIC • Gates • Number : Several injection points make the injection easier : the holding pressure, which causes glossy lines at the tear seams, can be decreased to minimal, without creating sink marks. • Design • Edge / fan gate : its width should be at minimum to fill the part(20-40mm) The thickness of the gate should be 15-25% of the part thickness at gate location. • Submarine gate : it should be a minimum of 60% of wall thickness to reduce sink marks. • Pin/valve gate : it is only not recommended in the emblem zone because it can cause surface defects for MIC applications. • Diameter : 1.2 – 1.5mm diameter injection point to avoid using too much holding pressure.

  15. Considerations in Tooling : MIC • Tear seam design • The angle of the tear seam to reduce glossy lines ; 30˚is a compromise between deployments and aspect. • Thickness of the tear seam : around 0.5 ~ 0.6 mm but decreasing to serve as initiator. • The bottom width of the tear seam : 0.4 ~ 1.0 mm • Walls, ribs • Ribs thickness should be 40% of the surface thickness at maximum to prevent sink marks. • Ribs height should not exceed 150% of the wall thickness when numerous ribs in the part. • If more robustness is required to flange to avoid tearing during deployment, it is possible to add riblets every 5cm.

More Related