| Código SH | 776476 |
| Conteúdo Va | 10% |
| Índice De Fusão | 0,55 g /10min |
| Densidade | 0,930 g /cm³ |
| Ponto De Fusão | 91 ° C |
| Ponto De Amolecimento Vicat | 70 ° C |
| Resistência à Tração Na Ruptura | 17 MPa |
| Alongamento Na Ruptura | 800% |
| Módulo Flexural | 42 MPa |
| Shore A Hardness Tradução | 90 |
| Temperatura De Fragilidade | -76 ° C |
| Clareza Do Filme | Bom |
| Forma | Filme Grade |
Como fábrica credenciada de resina de copolímero EVA Elevar EF510, 10% VA, 0,55 MI, grau de filme, aplicamos protocolos de qualidade rigorosos - cada lote é submetido a testes rigorosos para garantir padrões de eficácia e segurança consistentes.
| Embalagem | A Resina de Copolímero EVA Elevate EF510 é fornecida como pellets em sacos de papel revestidos de polietileno de 25 kg, ideais para processamento de filme. |
| Carga de contêiner (20' FCL) | Um recipiente FCL de 20 pés contém resina Elevate EF510 EVA paletizada, firmemente apoiada, mantida seca, ventilada e protegida do calor. |
| Envio | Eleve os navios de resina de copolímero EF510 EVA como pelotas de fluxo livre em sacos de 25 kg, supersacks ou caminhões de tremonha a granel. Proteja da umidade e do calor excessivo e armazene em uma área seca e ventilada, longe de fontes de ignição. Evite compactação; manuseie com equipamento de transporte padrão. Não regulamentado como perigoso para transporte em condições normais. |
| Armazenamento | Armazene a Resina de Copolímero EVA Elevate EF510 em sua embalagem original selada em uma área fria, seca e bem ventilada. Mantenha longe da luz solar direta, fontes de calor, chamas abertas e agentes oxidantes fortes. Proteja da umidade e danos físicos para evitar contaminação. Evite gerar poeira; mantenha a área limpa e siga boas práticas de limpeza. |
| Prazo de validade | A vida útil é tipicamente de 2 anos a partir da fabricação quando armazenado fechado em uma área fria e seca, longe da luz solar e do calor. |
No revestimento de estufa de monocamada, o Elevate EF510 é introduzido em um portador de polietileno de baixa densidade em frações de massa de 10% a 35%, com as unidades de acetato de vinilo de 10% interrompendo a orientação da cristalita o suficiente para aumentar a absorção de infravermelho de ondas longas na faixa radiativa de 7-13 µm, preservando a rigidez à tração. Em uma linha de filme soprado de três camadas equipada com um parafuso de barreira ranurado de 90 mm, L/D 30:1, e uma matriz rotativa de 350 mm, o perfil de temperatura é mantido a 165 °C, 175 °C, 185 °C, 190 °C, e adaptador/matriz a 192 °C. A pressão de fusão no pacote de tela permanece entre 220 bar e 260 bar. A relação de sopro é definida em 2,5:1, e a altura da linha de congelamento é mantida em 700 mm a 850 mm para uma folha de estufa 180 µm. A névoa medida por ASTM D1003-21 é mantida abaixo de 18%, e a transmissão de luz na banda de radiação fotosintéticamente ativa é confirmada com um espectroradiômetro contra 400-700 nm. O comportamento anti-névoa é produzido adicionando 3% a 5% de um masterbatch de monoestearato de glicerol. A tensão superficial após 7 dias de condensação acelerada a 50 °C e a umidade relativa 95% deve exceder 38 mN/m quando testada com tintas de ensaio de acordo com ASTM D2578-23. Os requisitos de resistência aos raios UV para revestimentos multiestacionais dependem da dose geográfica de raios UV; pacotes estabilizadores contendo HALS e absorventes de benzotriazol são tipicamente dosados em 0,3% a 0,6% em massa, e o alongamento de tração retido do filme é avaliado após 2.000 h de ciclo QUV por ASTM G154-23 com lâmpadas UVA-340 e uma temperatura de painel preto de 60 °C. As falhas de campo em instalações mediterrâneas são mais frequentemente registradas como divisão longitudinal prematura em pontos de fixação quando a área de contato com aço galvanizado retém calor acima de 55 °C, por isso, fitas de borda ou inserções de policarbonato são especificadas para instalações acima de 2.500 m altitude.
Elevar EF510 EVA resina de copolímero, 10% VA, 0,55 MI, grau de filme preços competitivos que se encaixam no seu orçamento - termos flexíveis e orçamentos personalizados para cada encomenda.
Para amostras, preços ou mais informações, entre em contato conosco em +8615380400285 Ou envie para sales2@liwei-chem.com.
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Pagamento flexível, preço competitivo, serviço premium - Consulte-nos agora!
Elevate EF510 is a film-grade ethylene-vinyl acetate copolymer resin with nominal vinyl acetate content of 10 wt% and melt index of 0.55 g/10 min determined at 190 °C and 2.16 kg in accordance with ISO 1133-1:2022 or ASTM D1238. The film-grade designation places the material in thin-web extrusion applications rather than injection molding, extrusion coating, or rotational molding. The resin is used in blown film, cast film, coextruded sealant webs, and lamination plies where lower VA content retains more polyethylene-like stiffness than 18 wt% or 28 wt% VA copolymers while still providing a measurable reduction in heat-seal initiation temperature and an increase in toughness relative to LDPE. The 0.55 g/10 min melt index is deliberately low: it increases melt strength, improves bubble stability in blown film, and reduces neck-in in cast film, but it also reduces melt flow and raises extruder head pressure compared with higher-MI ethylene-vinyl acetate grades. The product should therefore be specified when the film structure requires high melt strength and moderate polarity rather than maximum sealant tack or low processing back pressure.
Nominal density for this VA level is typically 0.930 to 0.933 g/cm³ when measured by ISO 1183-1 or ASTM D1505. Vinyl acetate content is commonly confirmed by Fourier-transform infrared spectroscopy using ASTM D5594, and the melt index is verified by capillary viscometry under ISO 1133-1:2022 conditions. The film-grade designation can include slip and antiblock packages, but the exact additive composition is manufacturer-specific and should be read from the certificate of analysis. Lot-to-lot molecular weight distribution and residual monomer levels may be monitored by gel-permeation chromatography and headspace gas chromatography; those data are not normally supplied unless requested for critical medical or high-temperature applications. Because the resin is hydrophobic, equilibrium moisture content is low, but surface condensation on cold pellets can introduce defects if not removed before extrusion.
Incoming resin inspection for EF510 should include pellet size distribution and fines content because low-MI EVA pellets can generate fines during pneumatic conveying; fines accumulate in hopper throats and cause feed instability. Bulk density is typically 500 to 560 kg/m³ for EVA film-grade pellets but varies with pellet shape; the value should be confirmed by the supplier. Black specks in film are measured by optical scanners or visual inspection against a light box. Because low-MI grades require higher screw torque, consistent pellet bulk density and uniform feeding reduce melt pressure fluctuations. Feedthroat temperature should be kept below 50 °C to prevent pellet clumping, and a hopper magnet is recommended to protect the screw from tramp metal. These incoming inspections are not part of the polymer specification but are standard incoming-quality procedures on production-scale blown film lines.
On a single-screw extruder with L/D of 24:1 to 30:1 and a barrier screw with compression ratio 2.5:1 to 3.5:1, the low melt index of EF510 produces a high-viscosity melt that should be processed with barrel temperatures between 190 °C and 220 °C. Ethylene-vinyl acetate copolymers begin to eliminate acetic acid at approximately 230 °C; formation of acetic acid is autocatalytic and can accelerate gel formation, brown specks, and corrosion in downstream equipment. The melt-temperature limit is therefore not a nominal recommendation but an operational boundary. Screw speed and back pressure should be monitored to ensure the melt temperature does not overshoot during high-shear operation. In blown film, a die gap of 1.2 to 2.0 mm, blow-up ratio of 2.5:1 to 3.0:1, and frost line height of 4 to 8 die diameters are representative ranges for low-MI EVA film grades. In cast film, die-to-chill-roll gap is typically 10 to 20 mm, and chill roll temperature is held at 15 to 25 °C to control crystallinity and film flatness. Published data for this specific configuration is limited; these ranges should be confirmed on the actual line because die diameter, air-ring geometry, and corona treatment conditions alter the useful operating window.
Pre-drying is normally unnecessary when the resin is stored at less than 60% relative humidity. If cold pellets are moved into a warm compounding room, surface condensation can require desiccant drying at 60 to 65 °C for 2 to 4 h. The drying system should be closed-loop desiccant rather than hot-air only, because humid air will not remove surface moisture efficiently at these low temperatures. During shutdown, the extruder should be purged with a higher-MI LDPE or EVA to displace EF510 from the screw and die; stagnant melt above 200 °C forms carbon deposits that may require mechanical cleaning. In coextrusion, vinyl acetate groups increase polymer-metal interaction relative to LDPE, so die-lip buildup and edge bead are field failure modes that must be managed with periodic wiping using copper-free tools and, if necessary, lower die-lip set temperatures.
For coextruded structures, EF510 is specified as a sealant layer on polyethylene or oriented polypropylene substrates when the final package must exhibit controlled seal initiation and good interlayer adhesion after lamination. Heat-seal strength is tested according to ASTM F88 or ISO 527-3 tensile methods, hot-tack according to ASTM F1921, and seal-through-contamination performance according to the packager’s internal method. The 10 wt% VA content provides a seal initiation temperature between that of LDPE and 18 wt% VA EVA; the exact value is a function of film gauge, sealing pressure, dwell time, and coextrudate layer thickness, so it should be measured on the final film rather than inferred from resin type. In agricultural and industrial film, dart impact resistance is measured by ISO 7765-2 or ASTM D1709, Elmendorf tear by ISO 6383-2 or ASTM D1922, and haze by ISO 14782 or ASTM D1003. These applications use the toughness and low-temperature flexibility of the EVA without demanding the lower modulus of higher-VA sealant grades.
Specimen conditioning for film testing follows ISO 291 at 23 ± 2 °C and 50 ± 5 % relative humidity for 40 h, unless otherwise specified by the end-use standard. Film tensile properties are usually measured in machine and transverse directions according to ASTM D882 or ISO 527-3; tear resistance is often reported as Elmendorf tear per ASTM D1922 or ISO 6383-2. The puncture resistance of EF510 film is not an inherent resin property but a function of gauge, orientation, and coextruded layer ratios. Processors should establish internal release targets from production-capability studies rather than from generic EVA literature, because film-grade additive packages and process history can shift elongation at break and impact resistance by more than 10% even when melt index and VA content are unchanged. This is especially relevant for thin-gauge films below 30 µm, where gauge variation and frost-line instability influence dart impact more than the base resin’s tensile properties.
On cast film lines with a 90 mm extruder and vertical die feeding a 1,500 mm wide chill roll stack, the low MI may require a drive motor with at least 15 to 20% additional torque capacity relative to a 2.0 g/10 min resin of the same VA content. The exact torque reserve should be calculated from the extruder OEM’s power curve. Neck-in and edge bead are lower than for high-MI EVA because of higher melt strength, but the melt curtain can show draw resonance if the chill roll speed is raised too quickly. Cast film thickness uniformity is checked with a capacitance or beta gauge across the web; gauge variation of less than ±3% at two-sigma is a typical internal control for films above 40 µm, but for thin films below 20 µm variation may be wider. These production-line observations are drawn from general film extrusion practice; EF510-specific data should be generated in a trial.
Differences among EF510, high-MI EVA, and higher-VA EVA become clearer when viscosity, crystallinity, and seal response are examined together. The following table summarizes representative published ranges for film-grade ethylene-vinyl acetate copolymers; it is not a replacement for lot-specific certificates or production trials.
| Attribute | EF510 nominal | High-MI EVA | Higher-VA EVA |
|---|---|---|---|
| Vinyl acetate content | 10 wt% | 10 wt% | 18 wt% |
| Melt index | 0.55 g/10 min | 2.0 g/10 min | 0.7 g/10 min |
| Density | 0.930–0.933 g/cm³ | 0.930–0.933 g/cm³ | 0.937–0.940 g/cm³ |
| Crystallinity | Higher | Comparable | Lower |
| Melt strength and bubble stability | Higher | Lower | Moderate |
| Seal initiation temperature | Higher | Comparable | Lower |
| Room-temperature stiffness | Higher | Higher | Lower |
| Adhesion to polar substrates | Moderate | Moderate | Higher |
The comparison shows that increasing VA content from 10 wt% to 18 wt% lowers crystallinity and seal initiation but increases density and polar adhesion; increasing melt index from 0.55 g/10 min to 2.0 g/10 min lowers melt strength and head pressure while leaving short-chain branching and VA-related polarity largely unchanged. In a film-line replacement, a shift from a 2.0 g/10 min EVA to EF510 is expected to require either higher barrel temperatures or lower screw speed to maintain the same melt pressure; screw speed reductions of 10 to 20% are commonly observed in practice but depend on screw wear, screw design, and die restriction. The higher melt strength of EF510 allows stable bubbles at BUR values at the higher end of the 2.5:1 to 3.0:1 range, but edge fold and gauge bands may appear if the frost line is too low. Conversely, replacing a 28 wt% VA EVA with EF510 will reduce cling, reduce low-temperature flexibility, and increase seal initiation; it may also reduce die-lip buildup and shorten purging cycles.
If the final film requires a seal initiation below that achievable with 10 wt% VA, EF510 can be coextruded with a thin 18 wt% or 28 wt% VA sealant skin. This construction retains the bulk stiffness and melt strength of EF510 in the core while placing the higher-VA resin only at the sealing interface. Interfacial instability between layers of different VA content is limited when the melt viscosity ratio at the die exit is low; processing the two resins within 10 to 15 °C of each other and selecting viscosity-matched grades minimizes layer distortion. Adhesion to polar barrier layers such as EVOH or polyamide is not provided by the 10 wt% VA units alone; tie resins based on maleic anhydride-grafted polyethylene or ethylene-acrylic acid are used in the adjacent layer. In such structures, the sealant layer is corona-treated or flame-treated on the lamination side, and peel adhesion is tested according to ASTM F904 for laminated films.
Compared with an LDPE resin of equivalent MI, EF510 has reduced crystallinity, lower heat-seal initiation, greater toughness at freezer temperatures, and higher surface energy. Those changes are measurable in film tests: EVA films typically show higher puncture and dart impact than LDPE of similar MI, but lower tensile modulus and higher cling. In the field, this translates to improved resistance to impact failure in frozen-food packages but reduced stiffness in stand-up pouches unless the film is oriented or laminated. The stiffness deficit can be compensated by using EF510 in the core and LDPE skins, or by increasing film gauge. That structural solution is more effective than modifying the EVA itself because raising VA content would further reduce modulus and melt strength.
For United States food-contact applications, ethylene-vinyl acetate copolymers meeting the compositional and extractives limitations of 21 CFR 177.1350 may be used as articles or components of articles that contact food. The migration of vinyl acetate monomer is not the only factor; the finished film must also satisfy the overall migration requirements of the intended food type and temperature condition. In the European Union, Regulation (EU) No 10/2011 requires evaluation of the monomers and additives in the final plastic layer, with specific migration limits for vinyl acetate and any slip or antiblock components. REACH Regulation (EC) No 1907/2006 and RoHS Directive 2011/65/EU statements should be obtained from the supplier’s safety data sheet and certificate of compliance for the exact grade and lot. Because EF510 is a film-grade resin that may contain processing aids, a pellet-level compliance statement does not automatically apply to a laminated or printed final structure; downstream converters are responsible for generating end-article compliance data on the finished package.
