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HS Code |
301727 |
| Product Name | Styrene-Ethylene-Butylene-Styrene Block Copolymer (SEBS YH-688) |
| Appearance | White powder or granules |
| Density | 0.89 g/cm³ |
| Melt Flow Index | 3-9 g/10min (200°C/5kg) |
| Shore A Hardness | 60-70 |
| Tensile Strength | ≥ 8 MPa |
| Elongation At Break | ≥ 400% |
| Styrene Content | 30-35% |
| Volatility | ≤ 0.8% |
| Ash Content | ≤ 0.15% |
| Odor | Odorless |
| Solubility | Soluble in aromatic and chlorinated hydrocarbons |
| Thermal Stability | Good |
| Light Transmittance | High |
| Color | Translucent or white |
As an accredited Styrene-Ethylene-Butylene-Styrene Block Copolymer (SEBS YH-688) factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | The SEBS YH-688 is packaged in a 25 kg net weight, moisture-proof, multi-layer kraft paper bag with inner plastic lining. |
| Container Loading (20′ FCL) | 20′ FCL contains SEBS YH-688 packed in 25kg bags, total load capacity approximately 16 metric tons per container. |
| Shipping | SEBS YH-688 is typically shipped in 25 kg net weight paper-plastic composite bags or PE bags, ensuring protection from moisture and contamination. The material should be stored and transported in a cool, dry place away from direct sunlight and strong oxidizing agents. Handling precautions should be observed during loading and unloading. |
| Storage | **Storage of Styrene-Ethylene-Butylene-Styrene Block Copolymer (SEBS YH-688):** Store SEBS YH-688 in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and moisture. Keep the material in tightly sealed, labeled containers to prevent contamination. Avoid exposure to strong oxidizing agents. Follow all local regulations and guidelines for safe chemical storage to maintain product integrity and safety. |
| Shelf Life | The shelf life of Styrene-Ethylene-Butylene-Styrene Block Copolymer (SEBS YH-688) is typically 24 months if stored properly. |
Applications of Styrene-Ethylene-Butylene-Styrene Block Copolymer (SEBS YH-688) in Industrial ManufacturingSEBS YH-688 functions as a thermoplastic elastomer with distinctive soft-touch, flexibility, and chemical resistance properties. Our manufacturing partners depend on its consistent quality for serving demanding sectors. Below, we outline its main industrial application scenarios, highlighting practical details for formulation and production teams in each field. 1. Medical Device Components & Instrument HousingsMedical manufacturing facilities value SEBS YH-688 for soft-touch zones and flexible connectors, replacing traditional PVC and silicone in hand grips, catheter sheaths, and diagnostic instrument enclosures. Its biocompatibility and resistance to disinfectants enable repeated direct patient contact while simplifying sterilization. Engineers integrate the polymer into multilayer extrusions or as over-molding on rigid substrates to meet ergonomic and safety targets. Industry compliance standards
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2. Wire & Cable Sheathing for Consumer ElectronicsConsumer electronics manufacturers choose SEBS YH-688 for sheathings and insulation layers on USB, headphone, and power cables. Its high flexibility, toughness, and excellent low-temperature performance replacement for traditional PVC ensure kink resistance and lasting strain relief, even under harsh bend and flex cycles in daily life. Facilities implement precise dosing to control surface finish and tactile feel, as well as meeting international safety regulations on phthalate-free and halogen-free production. Industry compliance standards
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3. Automotive Interior & Exterior Trim ComponentsOEM and Tier-1 automotive plastics operations rely on SEBS YH-688 for flexible trim and sealing elements, such as instrument panel skins, door rubbers, and console mats. The polymer delivers high UV and weathering resistance, as well as low fogging for compliance with vehicle interior air quality demands. TPE blends facilitate soft-touch haptic and precision over-molding, improving assembly efficiency and user experience. Industry compliance standards
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4. Footwear Soles & Sports Equipment Grip SurfacesFootwear manufacturers and sports equipment suppliers use SEBS YH-688 in blending to create cushioned, slip-resistant soles, outsoles, and grip-enhanced zones for sneakers, sandals, and athletic gear. Its low specific odor, hygienic profile, and colorability allow stylish and comfortable solutions. Through careful control of compound viscosity and density, downstream factories stamp or inject TPE blends into intricate sole geometries and ergonomic grip designs. Industry compliance standards
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5. Food Contact Sealants & Packaging FilmsFood industry converters select SEBS YH-688 for seals and gaskets in bottle closures, flexible packaging, and food-grade dispensing valves. It meets global food contact safety benchmarks and resists migration of taste or odor. Process engineers benefit from its clarity, flexibility at low temperatures, and ease of welding or lamination onto PE/PP coextrusions within hygienic manufacturing lines. Industry compliance standards
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6. Adult and Infant Care Disposable Hygiene ProductsThe hygiene sector integrates SEBS YH-688 into stretch films, elastic waistbands, and closure tapes in diapers, sanitary napkins, and incontinence briefs. High elasticity, skin comfort, and hypoallergenic profiles allow manufacturers to replace natural rubber and polyurethane-based components. Automated production lines require tight dosing control for expansion and recovery rates, and the polymer’s thermal stability supports long production runs without yellowing or odor emission. Industry compliance standards
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7. Sealants, Adhesives, and Bitumen Modification for Construction MaterialsBuilding material producers and prefabrication operations use SEBS YH-688 as an additive for elastic sealants, hot-melt adhesives, and bitumen modifiers. Its chemical resistance and resilience under high deformation enhance the performance of sealant joints, roofing membranes, and waterproofing systems exposed to temperature cycling and mechanical stress. R&D and production teams optimize dosage to balance adhesion, flexibility, and flow, especially in solvent-free or environmentally regulated formulas. Industry compliance standards
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Competitive Styrene-Ethylene-Butylene-Styrene Block Copolymer (SEBS YH-688) prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8618136850665 or mail to sales4@ascent-chem.com.
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Tel: +8618136850665
Email: sales4@ascent-chem.com
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For years in our manufacturing practice, we have watched demand for versatile thermoplastic elastomers rise alongside the search for lighter, safer, more durable materials. SEBS YH-688 emerged from a deep understanding of what processors and product designers struggle with: instability under sunlight, poor heat performance, oil incompatibility, and difficult blending. Our team put in countless hours refining not only the molecular structure but the actual extrusion and compounding steps to ensure every pellet hitting the bags holds up under tough conditions.
Unlike polystyrene-based rubbers that often crack or harden in the wrong environment, SEBS YH-688 adds toughness. By controlling the styrene and rubbery segments at the block copolymer level, we see improvements directly in extrusion quality and long-term elasticity. Through a lot of trial and hands-on feedback from downstream users, new formulas cut failure rates in automotive seals, medical tubings, and sports grips. All while keeping processability in mind, because a material that works in the lab but clogs real factory lines has no place in the field.
Every producer competes to deliver a more consistent product. But what matters most to us is what our operators can trust batch after batch. SEBS YH-688 brings actual impact when it melts evenly, flows smoothly, and leaves lines cleaner during long production shifts. This block copolymer resists yellowing, handles color masterbatches better, and stays flexible after repeated strain. Users see less dusting and less plate-out on the rolls, which reduces cleaning downtime and tool change frequency. We boil this down to less wasted labor, less scrap, and more usable throughput.
The model YH-688 grew out of constant line feedback. It was not enough to chase after technical specs. Injection molders wanted real output without waiting days for transitions between clear and colored grades. Cable coatings manufacturers reported back on surface tackiness, so we modified the oil absorption during synthesis. Medical device molders needed more resistance to sterilization cycles, so we adjusted the antioxidant packages. Over the years, this cooperative cycle with processors has built a product that stands up on the shop floor, not just in a datasheet chart.
YH-688 started as a copolymer meant for soft touch and resilience. It adapts to many mold and extrusion shapes. We have delivered it to hygiene, wire, appliance, and consumer goods makers. Most ordinary SBC grades suffer from a trade-off between softness and rebound—either too sticky or too rigid, especially at higher or lower temperatures. Our blend finds a middle ground: just the right elastic recovery, but with enough backbone for shape retention after demolding.
Where other TPEs add plasticizers to make up for rigidity, SEBS YH-688 manages a good feel without heavy reliance on additives. Less migration, fewer compatibility problems, longer useful life. End users appreciate how grips and overmolded parts retain smoothness and bounce-back, even after months on the shelf or after repeated bending. The way the chains are connected at microscopic scale means less creep and sag.
Our batches offer a white, neutral base, which takes on pigments and UV stabilizers precisely. This matters for outdoor uses—everything from stroller wheels to power tool handles. Users in the cable industry benefit from the high insulation resistance combined with toughness, creating jackets and insulation that survive flexing, compression, and chemical exposure.
Sourcing raw materials for SEBS block copolymers requires careful management, especially as global market volatility swings prices for styrene and ethylene. We maintain long-term supplier agreements so that we do not have to substitute grades at short notice, which would disrupt both our compounding and the processing at client facilities. If you have ever seen a production halt because a competitor switched base resin on the fly, you know the headaches it causes. Our strategy is to stick with consistent feedstocks and update our clients ahead of policy or spec changes.
Periodic benchmarking keeps YH-688 stable. Rather than reacting to every cost jump by switching base oils or fillers, we look at performance-to-cost ratios. Holding margins by passing forward sudden price spikes creates instability. Instead, we communicate with end users and plan buffer stocks together, so those making automotive or medical devices have time to qualify each new lot if changes must be made. This builds trust and reduces emergencies. Over time, it has lowered defect rates and increased loyalty, both for us and for the OEMs relying on us.
Before SEBS grades reached this refinement, many processors relied on SBS (styrene-butadiene-styrene) for flexibility. SBS loses its shape and becomes brittle with heat and sunlight over time. Where SBS hardens and cracks outdoors, YH-688 holds up in playgrounds, vehicle interiors, and tool grips. SEBS block copolymers in our experience also stand up better to lubricants, skin oils, and a variety of household and industrial chemicals.
Older thermoplastic rubbers often rely on recycled vulcanizates with inconsistent properties. Our YH-688 uses tightly controlled block lengths to avoid gels and hard specks that slow down runs or impact quality checks. We can calibrate melt flow and hardness with precision, making it compatible with injection, extrusion, and even some blow molding systems. Instead of tailoring dozens of different copolymers for slightly different end uses, a single stable master batch covers a broad range of needs. This helps small and mid-sized enterprises that cannot afford separate inventory stocks for every unique part.
Some alternative elastomers suffer from high specific gravity, raising the part weight and shipping costs. YH-688's lower density cuts material expenses per part. In applications like stroller wheels, medical stoppers, headphones, and personal care handles—lower density directly boosts cost competitiveness without risking performance.
In automotive and electronics, halogen-free cable requirements keep evolving. SEBS YH-688 integrates well into halogen-free compounds, giving wire harnesses and insulation that meet new fire and smoke criteria. Our customers appreciate that compatibility, not just because of compliance, but because it simplifies production lines and inventory—fewer masterbatches, less risk of downtime.
Our focus extends past producing bulk bags. We show processors how to adjust line speeds, screw designs, and pre-blending temperatures based on YH-688's behavior. In Europe and North America, processors asked for help reducing die drool and maintaining smoother surfaces. We tested production in their actual lines, building up expertise we pass to new customers. Real results come from knowing how modifications in temperature zones, screen pack choices, and back pressure translate from our plant to theirs.
For healthcare products, our own filter checks make sure no hidden contaminants pass through. Once, a run with suboptimal pellet dryness almost derailed a client's medical tubing order. We took lessons from that batch, investing in inline moisture analysis and improved venting sections on our extruders. Now, product lots exceed the moisture and clarity standards required for medical injection work.
In packaging, especially baby care and food-related goods, customers must meet strict migration and odor limits. We reformulated antioxidant packages to remain locked in the polymer structure, so SEBS YH-688 does not leach out under routine sterilization or UV exposure. Where butter or apple juice residue once caused surface softening and discoloration, our compounding changes provide better shelf life and appearance. Clients see higher repeat orders from brand owners sensitive to reputation and safety.
We never claim a product like YH-688 fits every scenario without adaptation. In reality, every processor has legacy machines, recycled regrind, or odd pigment packages to accommodate. Block copolymers sometimes build up static or attract dust during high-speed pellet transfer. We worked with installation teams to provide anti-static masterbatches and layout advice so that material stays clean from silo to extruder.
Another routine user challenge: maintaining color with successive long runs. Extended use of dark pigments risks streaking, plate-out, and die buildup. Our technical support teams, drawing on the experience of thousands of tons processed, recommend precise pigment loadings. We even changed pelletizing conditions to improve pigment dispersion. The result is better color hold and less frequent tooling changeover. These learnings came not from manuals, but group effort between operators, engineers, and us as material makers.
Global shifts in sustainable sourcing, recyclability, and user safety shape the future of block copolymers. Regulations step up quickly, often without warning. In our daily work, we prioritize formulas free from phthalates, heavy metals, and halogens, knowing that restrictions in one market can roll out worldwide. SEBS YH-688 is designed not only to comply, but to give users flexibility for the unexpected. This way, one resin can support tomorrow’s product innovations, instead of limiting design freedom because of regulatory lag.
Materials that perform in the real world drive success for both manufacturers and end users. For years, some suppliers cut corners to push lower prices or chase sales in temporary markets. We focus instead on lasting value—materials that survive both regulatory checks and real-life product trials. That commitment means tighter raw material traceability, more robust process audits, and investment in line automation.
We see SEBS YH-688 not as a commodity, but as a tool for solving design and durability problems across industries. Its recipe changes as our partners bring new applications into view—from touchable wearable shells to impact-absorbing pads and all the way to micro-scale molded seals in electronics. Each use brings feedback and each improvement cycles back into the product. With every drum or bag delivered, our teams remember the long path from raw monomer to a finished piece that sits in a child’s bike grip or a surgeon’s gloved hand.
Modern polymer manufacturing calls for more than technical data or claims of innovation. It relies on relationships, consistency, trust, and craft. SEBS YH-688 stands as an example—born from years of observation, trial, correction, and shared experience with customers worldwide. As producers, we carry the responsibility to ensure not only that factories run without hiccup, but that the products ultimately serve people, safely, efficiently, and for longer lives. This mindset guides every batch, every upgrade, and every technical conversation we have about YH-688.
Every day, operators, engineers, and designers rely on the quality and predictability of materials. We shape SEBS YH-688 to answer those needs, refining not just for charts and certifications, but for function in the field. From here, we keep learning, keep adapting, and keep holding ourselves to the level that the world’s toughest polymer challenges demand.
