Multibase TPE & TPV
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Multibase TPE & TPV







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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).
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Multibase TPE & TPV

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Slide 2

Multibase TPE & TPV

Slide 3

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

Slide 4

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

Slide 5

AutomotiveMarket

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

Slide 6

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

Slide 7

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

Slide 8

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)

Slide 9

Understanding the Nomenclature

  • S = Standard

  • W = Window

  • I0 = -30C in Chamber

  • I1 = -35C in Chamber

  • MW = Mar (MIC) Window

  • MI1 = Mar -35C in chamber

Slide 10

Typical Properties (TES 2604 MI1)

Slide 11

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)

Slide 12

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.

Slide 13

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.

Slide 14

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.

Slide 15

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.

Slide 16

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.


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