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HS Code |
553928 |
| Product Name | Styrene-Ethylene-Propylene-Styrene Block Copolymer (SEPS YH-4053) |
| Appearance | Milky white particles |
| Melt Index | 5 g/10min (200°C, 5kg) |
| Shore A Hardness | 53 |
| Tensile Strength | 10 MPa |
| Elongation At Break | 1100% |
| Styrene Content | 35% |
| Specific Gravity | 0.88 g/cm³ |
| Volatile Content | <0.7% |
| Ash Content | <0.1% |
| Thermal Decomposition Temperature | ≥330°C |
As an accredited Styrene-Ethylene-Propylene-Styrene Block Copolymer (SEPS YH-4053) factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | The SEPS YH-4053 is packaged in a 25 kg net weight, moisture-proof, multi-layer paper bag with an inner PE liner. |
| Container Loading (20′ FCL) | 20′ FCL typically loads 16–18 metric tons SEPS YH-4053, packed in 25kg bags, palletized for secure international shipping. |
| Shipping | Styrene-Ethylene-Propylene-Styrene Block Copolymer (SEPS YH-4053) is typically shipped in 25 kg bags or bulk containers. The product should be stored and transported in a cool, dry, and well-ventilated area, away from direct sunlight, heat, and incompatible substances to ensure product stability and safety. |
| Storage | Styrene-Ethylene-Propylene-Styrene Block Copolymer (SEPS YH-4053) should be stored in a cool, dry, and well-ventilated area, away from direct sunlight, heat, and sources of ignition. Keep the material in tightly sealed, original containers to prevent contamination. Avoid exposure to strong oxidizing agents and moisture for optimal stability and preservation of the polymer’s properties. |
| Shelf Life | Shelf Life: SEPS YH-4053 has a recommended shelf life of 12 months when stored in cool, dry conditions, away from sunlight. |
Applications of Styrene-Ethylene-Propylene-Styrene Block Copolymer (SEPS YH-4053) in Industrial ManufacturingSEPS YH-4053 is used in demanding industrial environments requiring precise thermoplastic elastomer properties for advanced compounding, specialty coatings, and high-performance molded goods. The following sections detail specific downstream applications, including regulatory frameworks, formulation guidelines, manufacturing integration, and typical end products across key industries. 1. Adhesives and Sealants for Hygiene ProductsHygiene product manufacturers use SEPS YH-4053 for hot-melt adhesives designed for diaper core construction, feminine hygiene pads, and medical dressings. The polymer's good cohesion, elasticity, and low odor profile fit strict compliance and processing requirements. Formulators control tack, open time, and peel strength by adjusting polymer ratios in response to substrate and processing temperature. Strict batch traceability is maintained, with continuous verification against hygiene-grade additive specifications and migration standards. The material integrates after tackifier blending and before compounding with plasticizers, followed by drum or block cooling for granulation prior to downstream application. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
2. Thermoplastic Elastomer Compounds for Wire and Cable JacketingThe wire and cable sector incorporates SEPS YH-4053 in flexible TPE compounds aimed at meeting insulation and sheathing demands, including resistance to chemical, oil, and heat exposure. Safety and performance protocols require non-halogenated, low-smoke ingredients, with attention to electrical and mechanical testing defined by international cable standards. Blending occurs through twin-screw extrusion lines, and polymer ratios shift according to flame-retardancy requirements and mechanical flexibility benchmarks. The compound proceeds via pelletizing before entering the downstream cable extrusion or co-extrusion lines. Industry compliance standards
Typical usage ratio
Downstream process integration
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3. Modified Asphalt for Road and Roofing ApplicationsAsphalt modification plants rely on SEPS YH-4053 as a key elastomer to enhance rutting resistance, crack resistance, and temperature flexibility in both road pavement and waterproofing membranes. The block copolymer is added after primary bitumen softening and prior to the addition of fillers and process oils, with process controls in place for reaction time, mixing speed, and homogeneity. Careful documentation supports transport sector audits, and finished binders must pass national test protocols for abrasion, elasticity, aging, and low-temperature flexibility. The resultant polymer-modified bitumen is typically processed into sheet membranes, poured as road overlay, or pelletized for field blending by end users. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
4. Film and Sheet Extrusions for PackagingFlexible packaging converters specify SEPS YH-4053 to impart elasticity, clarity, and puncture resistance in stretch films, overwraps, and specialty protective sheets. The polymer is incorporated in precision extrusion lines, following dispersal and pre-blending with antiblocking agent, slip additive, and optical brightener. Conformance with food-contact and safety regulations remains mandatory. Film gauge control and uniformity are verified during extrusion, and end products undergo mechanical and migration testing to guarantee compliance with global packaging standards. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
5. Soft Touch and Overmolded Consumer GoodsMolders in the consumer sector use SEPS YH-4053 to achieve soft, grippy exterior layers in toothbrush grips, personal care bottles, razors, and remote controls. The elastomer is dosed directly into overmolding injection units, with careful process control over melt flow, adhesion to substate, and layer thickness. Manufacturing lines align production with RoHS and REACH protocols for restrictable substances, ensuring every overmolded finish complies with end-market safety audits. Final inspection covers adhesion integrity, migration, and durability under repeated hand contact and chemical exposure. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
6. Medical Device Tubing and ComponentsThe medical device industry employs SEPS YH-4053 in tubing, stopper, and flexible device components, demanding biocompatibility, chemical resistance, and precise mechanical properties. Raw material loading points precede extrusion, injection, or blow-molding, integrated into ISO 13485-certified cleanrooms. Processing parameters prioritize cleanliness and consistent polymer melt behavior. Every lot is supported by USP Class VI, ISO 10993, and traceability testing. Finished goods pass cytotoxicity, leachables, and physicomechanical verification, ensuring suitability for medical fluids and bodily contact. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
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Competitive Styrene-Ethylene-Propylene-Styrene Block Copolymer (SEPS YH-4053) prices that fit your budget—flexible terms and customized quotes for every order.
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From our perspective as hands-on manufacturers, the moment you start talking about Styrene-Ethylene-Propylene-Styrene Block Copolymer, you shed the buzzwords and begin thinking about the day-to-day demands of real production lines. Factories call for a polymer that goes beyond simply ticking off melt flow rates and tensile strengths—they need reliability, ease of handling, and predictable results shift after shift. SEPS YH-4053 steps in with a practical balance of softness, resilience, and processability. Unlike older generations of styrenic block copolymers, YH-4053 isn’t hampered by excessive stickiness or uncontrollable flow, which shaves off wasted time and effort during mixing, molding, or extrusion.
Over years of working with different families of thermoplastic elastomers, our team has watched the needs of compounding, medical, and consumer goods applications evolve. Many industries now turn up the heat on their material suppliers, requiring not only clean, consistent product quality but also the absence of phthalates, better thermal stability, and improved mechanical performance. YH-4053 evolved in response to these changes. Built through controlled hydrogenation and precise block structure design, it stands out from the styrene-butadiene and styrene-isoprene grades that dominated earlier decades.
In practice, what counts isn’t whether the polymer matches a brochure, but how it behaves when loaded into an extruder or a mixer. SEPS YH-4053 offers a customized density, hardness, and tensile set tailored through feedback from frontline operators, not just lab techs. Engineers appreciate that the product keeps its balance of softness and toughness through multiple processing cycles. On inspection lines, workers notice YH-4053 resists tackiness—a common headache with traditional SEBS, especially under summer heat. When equipment runs day and night, this feature lets the plant crew cut down on stoppages due to sticking or stringing.
Our clients in the cable jacketing sector see less die-drool and better surface appearance. In grips, seals, and soft-touch handles, product surfaces turn out smooth without bloom or color speckling. This all flows from a structural difference at the molecular level: YH-4053 doesn’t carry the heavy oil loadout of older SEBS types, which cuts migration issues further along the supply chain, improving both storage and the final product feel.
Every production supervisor harbors a mix of skepticism and hope when a new polymer comes down the pipeline. We welcomed those doubts years ago. SEPS YH-4053 first landed on our own line for prototype runs, so problems stood no chance of hiding behind handpicked lab samples. Unlike SEBS in the same viscosity range, YH-4053 consistently delivered low haze in transparent compounds for toy and medical markets. Molders reported faster cycle times with a clean demold, especially in inserts and over-molding onto polar substrates like polycarbonate. Shoes and sportswear factories gave high marks for the bounce-back and stretching, but with far less color fatigue under repeated cycles versus competitors.
Firms using calendered sheets speak highly of SEPS YH-4053’s smooth roll release, saving on release agents and rework. As demand grows for recyclable thermoplastics, our customers appreciate the reduced plasticizer content, making it easier to recover and reprocess off-cuts in the same batch or next production run.
Let’s cut straight to the story of adding value. Most process engineers don’t have the bandwidth for theoretical debates about aromatic-to-aliphatic ratios or microphase separation—they see the bottom line and the scrap bag. SEPS YH-4053 stacks up well where it counts: it hits high extensibility without the conventional trade-off in compression set. That’s a crucial advantage for anyone molding grips, gaskets, or medical stoppers. A practical benefit in a typical day’s run is the improvement in flowability for injection molding, especially in tools with complex geometries or thin-wall parts that leave other block copolymers struggling.
Along with flowability, transparency is another selling point the end markets keep chasing. SEPS YH-4053 can bring clarity to the same level as some high-purity SEBS, without cranking up the cost per kilo. It accepts colorants with high coverage and remains true to color after UV exposure, something soft PVC and conventional SEBS blends can’t deliver without stabilizer overkill. In hygiene and baby care goods, that drop in extractables helps meet ever-tighter regulations and customer audits—a real source of buyer confidence, not just a lab claim.
The polymer industry doesn’t afford many chances to stand still. As customer expectations increase, especially from regulators and international retailers, producers face more audits and documentation requests. Our work with YH-4053 lets us assure buyers about both traceability and composition. This copolymer contains no phthalate plasticizers or intentionally added heavy metals, so both internal and external lab checks run smoother. Medical device customers ask for extractables reports, and the product stays within the limits for key migration tests. Toys and household goods benefit from the same purity, which means manufacturers field far fewer returns or regulatory questions after market launch.
On the processing side, automation demands materials that flow evenly and fill molds completely, even as batch sizes fluctuate. SEPS YH-4053 keeps viscosity tight between lots, easing these transitions. Customers who blend it with polypropylene, polyethylene, or polystyrene to create harder or softer grades enjoy better dispersion and compatibility than with regular SEBS. This isn’t marketing fluff—it’s something we validate in our own mixing halls, extruding blends and checking for streaks, gels, or loss of rubber content.
Sustainability is more than PR talk—it’s increasingly about compliance, recycling yield, and cost. Factories that need to meet green targets can take YH-4053 back into the cycle without a hitch, cutting down landfilled waste. Managers running regrind operations notice few property losses after the first melt, even in color-sensitive applications. Where some SEBS and SBS products lose elasticity or toughen up too quickly after reprocessing, SEPS YH-4053 holds properties across at least two cycles. This direct feedback led us to support more closed-loop programs within our and partner facilities.
People ask about energy: every time we run YH-4053 versus a high-melt SBS, extruder amperage holds steady and barrel fouling stays low, so line operators face less downtime for cleaning. This translates to savings not just on the electric bill, but on labor, maintenance, and lost output during inevitable stoppages. As labor pools tighten, that reliability gets baked into purchasing decisions more than many realize.
Anyone in compounding knows that not all styrenic copolymers behave the same. The biggest distinction between SEPS YH-4053 and traditional SEBS (Styrene-Ethylene-Butylene-Styrene) or SBS (Styrene-Butadiene-Styrene) boils down to chemical stability and ease of use. SBS, prized for cost and process speed, falls down with UV exposure and oil resistance; early-generation SEBS fixed some of those gaps, but usually required heavy oil loadings to reach softness, leading to migration headaches and diminished mechanicals over time. SEPS uses controlled hydrogenation, so the backbone resists oxidation much longer, rejecting the yellowing that plagues SBS in outdoor or clear uses.
Unlike SEBS loaded with oil to reach a soft touch, SEPS YH-4053 keeps flexibility while carrying less extractable material. For customer-facing goods—think toothbrushes, phone cases, cup holders—this matters for safety checks and shelf-life. Medical customers focusing on odor and purity requirements find SEPS an edge over SEBS, particularly in new regulatory climates. In blend compatibility, SEPS’s random ethylene-propylene chains mix more naturally with both polypropylene and polyethylene, broadening the application base. SEPS also tends to show less stress whitening than SEBS grades, which means parts look newer for longer, even after repeated flexing.
Looking across the sectors we serve, SEPS YH-4053 wins repeat orders from processors making soft medical tubes, protective films for electronics, and overmolded tools. In shoe manufacturing, faster flow helps fill dense molds, keeping lines running at speed during high-volume seasons. Medical molder lines value the low odor and minimal leachables; QC departments run fewer complaint checks and batch recalls. Compounding houses appreciate the ease of premixing directly with standard polyolefins, reducing the need for specialty compatibilizers.
Major appliance makers integrate SEPS YH-4053 into gaskets and dampening pads to support quieter, more comfortable end-user experiences. Automotive suppliers slot it in for HVAC seals and trim parts where long-term UV and temperature swings would toast alternative elastomers. By dropping the plasticizer load from the mix, customers working in high temperature or sunny climates see goods that yellow less and stay supple longer.
Experience has taught us to anticipate batch variability, line contamination, and last-minute production changes. SEPS YH-4053 shrinks those worries. Our in-house compounders find that premixes with YH-4053 remain shelf-stable, so customers can run smaller jobs without fighting gel buildup or viscosity swings. Processors using soft touch compounds report reliable fusion with ABS and PC, reducing scrap from weak weld lines or poor bond at the insert interface.
Shipping and storage never stay simple. Containerized goods can see weeks of temperature swings crossing borders or waiting on docks. We track our own bags across seasons and climates. SEPS YH-4053 resists caking and blocking, keeping flow steady at the feeder whether in humid summer or bone-dry winter. For processors supplying multinational brands, this resilience keeps their schedules intact when sudden audits or inventory surges hit.
Every new regulation, especially in Europe and North America, asks more of those producing toys, medical parts, or personal care goods. With recent pushes for transparency in content and sourcing, YH-4053’s clean bill of ingredients slashes paperwork and risk for our partners. Auditors focusing on phthalates, organotins, or aromatic hydrocarbons can check off requirements quickly thanks to the product’s tailored formulation. Allergy-prone markets—especially baby care and personal hygiene—rely on that upstream purity, reducing field complaints and recalls.
Extractable content, always a hot-button issue, runs low enough to remove concerns for leachable plasticizers. Labs spot-test with major solvents and acids and come back with clear, tight bands on chromatographs. In our own plant, product managers catch fewer QC holds for contamination or off-odor, so output stays on schedule and customers rest easier with each shipment received.
The push for lightweighting and more durable goods won’t slow down. Housing, appliances, auto interiors, even personal electronics want soft, flexible surfaces that hold up to years of grime and sunlight. YH-4053 lets processors hit those needs by dialing in softness without overflowing the part with cheap oil fill. Formulators notice that small changes in YH-4053 loading swing the durometer more than SEBS, so teams can meet spec in fewer trials and adjustments. Over tough cycles—crush, flex, twist—the copolymer retains bounce without breaking down, outperforming harder, stiffer alternatives by a wide margin.
Our work with extrusion and film producers highlights the edge this product gives with clearer films and sheets for protective uses. Pull a roll after a week on the line and clarity stays consistent, surface bloom runs low, and static handling doesn’t suffer. OEMs value this stability, as it shrinks their complaint queue. In headphones, grips, and tool handles, finish smoothness and UV durability keep end-users returning for repeat brands, building real loyalty rather than a one-time sale.
Markets don’t sit still. Quickly tightening standards for extractable content and environmental impact have made once-trusted SEBS or SBS less popular, especially in Europe and North America. SEPS YH-4053’s composition fits right into these emerging requirements. Supply chain transparency gains steam, and because we control chemistry from the reactor through pelletizing, partners trace every batch. For contract manufacturers, this means clearer documentation during audits, fewer supplier headaches, and greater ability to meet customer requests in regulated products.
Challenges remain: oil price volatility impacts all polymer makers, and customers expect ongoing property innovation. We invest in small-lot pilot lines to test next-generation blends, learning from each run which recipes travel best from pilot to full-scale. Working with clients facing complex regulatory needs, we tweak molecular weights and chain architectures to hit each new hurdle. Industry trends favor a move from over-plasticized rubbers to cleaner, leaner copolymers, and we’re there with data and field results—not just claims.
Our customers’ best feedback comes not from marketing surveys, but from the cycles their parts run out in the field. Doors in sunny climates, tools bouncing around in truck beds, personal goods washed a hundred times—these situations separate talkers from doers. SEPS YH-4053 earned its place line by line, part by part, crossing boundaries from extrusion and molding into new categories each year. We keep listening to plant managers, end-users, regulatory officers, and new designers—putting their experience right back into every resin lot we ship.
In the long haul, the difference SEPS YH-4053 brings to production lines and products downstream is the result of real-world lessons, not catalog promises. Whether in flexible toys, medical fittings, appliance gaskets or personal electronics, its balance of processability, safety, and toughness means lines keep running and brands stay respected. We remain in the trenches, building not just the next lot, but the next solution for customers facing new challenges every month. Each resin that leaves our floor carries the proof of countless hours learning, adjusting, and making sure every partner can rely on us as much as the SEPS YH-4053 itself.
