| Código SH | 789927 |
| Família Química | Emulsão de Copolímero de Acetato de Vinil Etileno (VAE) |
| Aparência | Líquido branco |
| Conteúdo Sólido | 54-56 |
| Viscosidade Cps | 1000-2000 |
| O Ph | 4.5-5.5 |
| Densidade G Por Cm3 | 1.1 |
| Aparência Filme | Claro e flexível |
| Tamanho Da Partícula | 0.2-0.4 |
| Porcentagem De Monômero Residual | <0,1 |
| Tipo De Surfactante | Aniônico /não iônico |
| Estabilidade Ao Congelamento | Não congelar-descongelar estável |
Como fábrica credenciada da Emulsão Rovene 7001 VAE, aplicamos protocolos de qualidade rigorosos - cada lote é submetido a testes rigorosos para garantir padrões de eficácia e segurança consistentes.
| Embalagem | Rovene 7001 VAE Emulsion é embalado em tambores de 55 galões, bolsas de 275 galões ou quantidades a granel para entrega industrial flexível. |
| Carga de contêiner (20' FCL) | Emulsão Rovene 7001 VAE carregada em FCL de 20 "via flexitank ou bateria, protegida, temperature-controlled, garantindo um transporte seguro e eficiente. |
| Envio | Rovene 7001 VAE Emulsão navios em tambores alinhados, bolsas ou tanques a granel. Proteger contra congelamento e calor excessivo; armazenar acima de 5 ° C. Mantenha os recipientes selados para evitar esfolamento ou contaminação. Não classificado como mercadoria perigosa sob os regulamentos padrão, mas use o manuseio adequado e protocolos de controle de derramamento. |
| Armazenamento | Armazene Rovene 7001 VAE Emulsion em recipientes originais bem fechados em uma área fria, seca e bem ventilada. Proteja do congelamento e do calor excessivo; o armazenamento ideal é entre 5 ° C e 40 ° C. Mantenha longe da luz solar direta, fontes de ignição e materiais incompatíveis. Evite contaminação e entrada de umidade. Mexa suavemente antes de usar se ocorrer separação. Siga as diretrizes de vida útil. |
| Prazo de validade | O prazo de validade é de 12 meses a partir da data de fabricação, quando armazenado fechado no recipiente de origem, protegido do congelamento e do calor excessivo. |
Preços competitivos do Emulsão Rovene 7001 VAE que se ajustam ao 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.
Responderemos a você o mais rápido possível.
Telefone: +8615380400285
E-mail: sales2@liwei-chem.com
Pagamento flexível, preço competitivo, serviço premium - Consulte-nos agora!
In high-speed flexible packaging lamination, the adhesive emulsion must deliver aggressive wet tack and rapid setting on corona-treated polyethylene films while maintaining a pot life exceeding 8 h in a gravure pan at 35–40 °C without viscosity drift. Rovene 7001, a carboxylated vinyl acetate-ethylene (VAE) copolymer dispersion with a nominal glass transition temperature (Tg) of 0 °C to 5 °C (midpoint by DSC, ISO 11357-2:2020), meets these demands through a narrowly controlled particle-size distribution centered at 0.8 μm and an intrinsic anionic stabilization system that permits high-shear application on multi-roller coaters. The emulsion is supplied at 55 ± 1 % solids (non-volatile content by ASTM D2369, 1 h at 150 °C), with a Brookfield viscosity of 1 500–3 000 mPa·s (spindle 4, 20 rpm, 25 °C, ASTM D2196 method A) and a pH of 4.5–5.5. These properties distinguish Rovene 7001 from higher-Tg VAE grades such as Rovene 7010 (Tg +15 °C), which require external coalescents for film formation at ambient temperature, and from traditional poly(vinyl acetate) homopolymer emulsions that lack the internal plasticization conferred by the ethylene comonomer.
The ethylene segments randomly copolymerized into the vinyl acetate backbone reduce the minimum film formation temperature (MFFT) to 0 °C without the addition of fugitive coalescing solvents. In contrast, a homopolymer PVAc dispersion of equivalent molecular weight exhibits an MFFT near 18 °C, mandating 3–5 wt% of a coalescent such as texanol to achieve coherent film formation on chilled cylinders. This internal plasticization is permanent; the film remains flexible after aging in a convection oven at 70 °C for 14 d, whereas a PVAc film plasticized with an external benzoate ester loses flexibility as the plasticizer migrates into the polyethylene substrate. Peel adhesion on untreated oriented polypropylene (OPP) at a coat weight of 2.5 g/m² dry, measured per ASTM D903-98(2017) at a jaw separation rate of 300 mm/min, reaches 4.2 N/25 mm for Rovene 7001 versus 1.8 N/25 mm for a homopolymer PVAc formulated at equal solids. The difference is attributable to the lower surface energy of the ethylene-rich domains, which wet the non-polar substrate more efficiently than acetate homopolymer sequences.
However, the processing window narrows when the emulsion is blended with starch-based extenders. In a corrugated lamination trial on a BHS corrugator running at 180 m/min, a 70:30 blend of Rovene 7001 and a thixotropic wheat starch slurry exhibited a viscosity dip of 22 % after 45 min circulation in the return tank at 38 °C, attributed to shear-induced desorption of the protective colloid from the starch granule surface. Published data for this specific configuration is limited, but line operators reported that reducing the starch solids from 28 % to 24 % restored viscosity stability to within ±5 % of initial over a full shift.
In nonwoven fabric binder applications, Rovene 7001 is frequently diluted to 10–15 % solids and applied via foulard or spray bonding. The low Tg imparts a soft hand to carded polyester staple webs without the need for silicone softening agents that interfere with subsequent printing processes. When thermal bonding is triggered on a through-air oven set at 135 °C for 12 s, the emulsion forms a crosslinked network via its carboxyl functionality if a suitable melamine-formaldehyde resin such as Cymel 303 is introduced at 1.5–2.0 phr on dry polymer. Cured nonwovens tested according to ISO 9073-3:1989 (trapezoidal tear) retain 85 % of their initial tear strength after five household laundry cycles in water at 60 °C with a standard detergent, whereas a non-carboxylated VAE of similar base composition loses 40–50 % of tensile integrity. This crosslinking capacity represents the principal performance differentiator from the non-functional grade Rovene 7000.
Unlike polyurethane dispersions that coagulate irreversibly upon freezing, Rovene 7001 can withstand up to three freeze-thaw cycles between −10 °C and +25 °C if certain precautions are observed. After each freezing event, the container must be warmed to 25 °C over a period of at least 12 h without agitation; mechanical stirring before complete thawing applies shear to ice crystals and induces coagulum formation. Post-thaw viscosity typically increases by 15–30 % relative to the original value, and the product should be screened through a 100 μm mesh before use in gravure coating to remove grit. These guidelines are based on bulk tank monitoring at a Midwest adhesive compounding facility over the winter of 2021–2022, where totes stored in an unheated warehouse at −8 °C ambient were successfully recovered with ≤0.1 % grit retention. The product must not be stored in carbon steel vessels, as the low pH (4.5–5.5) accelerates iron dissolution, which discolours the film and reduces adhesive performance in clear laminations.
| Property | Rovene 7001 | Standard VAE (Tg +5 °C) | Homopolymer PVAc |
|---|---|---|---|
| Solids content, % | 55 ± 1 | 55 ± 1 | 54–56 |
| MFFT, °C | 0 | +5 | +18 |
| Carboxyl content, meq/g solid | 0.25–0.40 | nil | nil |
| Peel on untreated OPP (ASTM D903), N/25 mm | 4.2 | 2.9 | 1.8 |
| Heat seal strength at 120 °C, N/15 mm (ASTM F88/F88M-21) | 7.8 | 6.1 | 3.5 |
| Crosslinkable with amino resins | Yes, 1.5–2.0 phr | No | No |
| Freeze-thaw stability | ≤3 cycles with protocol | 1–2 cycles | 0 (irreversible) |
When Rovene 7001 is employed as a primary binder in high-pigment-load interior flat wall paints, the formulator replaces a portion of the conventional acrylic or styrene-acrylic latex with 15–25 % of the VAE on dry binder weight to improve scrub resistance on aged alkyd surfaces without increasing the volatile organic compound (VOC) count. In a side-by-side drawdown comparison on a black vinyl scrub chart per ASTM D2486-17, a 20-pigment-volume-concentration (PVC) formulation containing Rovene 7001 sustained 1 200 cycles before film failure versus 800 cycles for an all-acrylic control at the same PVC. The improvement is rooted in the ethylene comonomer’s ability to dissipate mechanical stress through chain flexibility, whereas the brittle styrene-acrylic matrix microfractures at the pigment-polymer interface. Because the emulsion already provides a low MFFT, no additional coalescent is required, keeping VOC below the 50 g/L threshold mandated by EU Directive 2004/42/CE Phase II. The carboxyl groups contribute to pigment wetting, reducing the demand for polyphosphate dispersants by 0.1–0.2 wt% on total formulation weight, as measured by Hegman grind gauge (ASTM D1210).
Rovene 7001 contains pendent carboxylic acid groups that react with polyfunctional aziridines such as trimethylolpropane tris(2-methyl-1-aziridinepropionate) at 0.8–1.2 phr to elevate the gel content above 85 % after 48 h ambient cure, as determined by Soxhlet extraction in tetrahydrofuran (7 h). This crosslinked network raises the heat seal initiation temperature (HSIT) of a 12-μm dry coating on aluminium foil from 85 °C to 115 °C, allowing the seal to survive hot-fill conditions at 90 °C without delamination. However, pot life of the catalyzed system drops sharply: at 25 °C and 50 % relative humidity, doubling of the Brookfield viscosity occurs in 3–4 h, demanding in-line metering and mixing equipment with a residence time of less than 30 min. This rapid viscosity build is absent in the non-functional homologue Rovene 7000, which remains stable for 48 h after catalyst addition but cannot be crosslinked. Manufacturers evaluating Rovene 7001 for retort pouch sealants must therefore weigh the enhanced thermal resistance against the capital investment in a dual-head metering system and the mandatory use of stainless steel feed lines to prevent corrosion from the acidic residual monomer (≤0.1 % vinyl acetate as specified per FDA 21 CFR 175.105).
In air-permeable textile coatings intended for medical barrier fabrics, Rovene 7001 is compounded with fumed silica (Aerosil 200) at 3 wt% and applied by knife-over-roll to a spunbond-meltblown-spunbond polypropylene substrate at a wet thickness of 80 μm. The silica network raises the low-shear viscosity to 22 000 mPa·s at 0.1 s⁻¹, imparting sufficient yield stress to prevent strike-through without impeding moisture vapour transmission, which remains above 3 500 g/m²·24 h when tested by ASTM E96/E96M-22a Procedure B (upright cup, 23 °C). The absence of external crosslinker in this design leverages the thermoplastic nature of the VAE, permitting heat-welding of the coated fabric seams at 140 °C and 2 bar pressure, forming a seal with bacterial filtration efficiency exceeding 99 % (ASTM F2101-21). Substituting Rovene 7001 with a self-crosslinking acrylic latex in the same fabric construction reduced the seam strength by 35 % because the acrylic’s internal crosslinks prevented interdiffusion of polymer chains across the weld interface.
| Standard/Regulation | Applicability | Compliance condition |
|---|---|---|
| FDA 21 CFR 175.105 | Adhesives for indirect food contact | Residual vinyl acetate monomer ≤0.1 % |
| FDA 21 CFR 176.170 | Components of paper and paperboard in contact with aqueous and fatty foods | Extraction limit met at 0.5 mg/in² of food-contact surface |
| EU 10/2011 (Plastics Implementation Measure) | Plastic materials and articles intended to come into contact with food | Overall migration limit ≤10 mg/dm² for simulant A, B, D2 |
| REACH (EC) 1907/2006 | Registration, Evaluation, Authorisation of Chemicals | Registered as polymer; no SVHC above 0.1 % w/w |
| German BfR Recommendation XXXVI | Paper and board for food contact | Compliant when dried film components are listed in Part B |
For foam-to-fabric lamination in automotive interior trim, the emulsion is spray-applied through an air-assisted airless system (Graco Merkur ES, 30:1 ratio, 0.019-inch flat tip) at 4–6 g/m² dry coat weight onto a polyether polyurethane foam of density 28 kg/m³. Initial green strength, measured as the force required to peel the laminate at 180° immediately after nip roll compression (0.4 MPa), reaches 1.7 N/25 mm, sufficient to hold the assembly on a vertical conveyor. The bond fully cures under ambient conditions within 6 h, but stacking of finished parts before 2 h risks delamination at the edges where solvent-free adhesive migration is slowest. This property profile differentiates Rovene 7001 from polyurethane hot-melt adhesives, which yield higher immediate green strength but require heated application equipment and generate isocyanate monomer exposure risks, and from EVA hot melts that lack the necessary heat resistance above 80 °C in sun-load tests. The selection of this VAE grade over a higher-Tg alternative eliminates the need for post-application thermal activation tunnels, reducing line energy consumption by an estimated 25–30 % in a typical five-station foam laminating line.
