| Código SH | 241186 |
| Aparência | Líquido branco leitoso |
| Conteúdo Sólido | 55 ± 1% |
| Viscosidade | 2000-4000 mPa · s (Brookfield, 25 ° C) |
| O Ph | 5,0-7,0 |
| Tamanho De Partícula | 0,5-2,0 μm |
| Temperatura Mínima De Formação De Filme | 0 ° C |
| Temperatura De Transição Vítrea | -5 ° C |
| Teor De Etileno | 15-20% |
| Flexibilidade Do Filme | Excelente, sem rachadura na dobra de 180 ° |
| Adesão A Substratos Flexíveis | Forte adesão a PET, PVC, papel e tecido |
| Resistência à água | Bom, mantém a integridade do filme após imersão em água 24h |
| Estabilidade De Armazenamento | Estável por 12 meses a 5-35 ° C |
Como fábrica credenciada CW FS-Emulsão VAE para aplicações de substrato flexíveis, aplicamos protocolos de qualidade rigorosos – cada lote é submetido a testes rigorosos para garantir padrões de eficácia e segurança consistentes.
| Embalagem | Embalado em tambores de 200 kg, bolsas IBC de 1000 kg ou navios-tanque a granel; assegure o armazenamento seco e selado e manuseie com cuidado. |
| Carga de contêiner (20' FCL) | 20 “FCL: Emulsão VAE carregada em flexitanks ou tambores, firmemente apoiada, ventilada e temperature-controlled para evitar vazamento e contaminação. |
| Envio | CW FS-VAE Emulsão navios em tambores selados ou bolsas IBC. Proteger do congelamento e calor excessivo; armazenamento ideal entre 5 '30 ° C. Mantenha os recipientes em pé, secos e fora da luz solar direta. Use equipamento de elevação adequado e evite contato com a pele /olhos. Transporte como dispersão aquosa não perigosa. |
| Armazenamento | Armazene a emulsão CW FS-VAE em recipientes originais bem fechados em uma área fria, seca e bem ventilada. Evite luz solar direta, altas temperaturas e congelamento; o armazenamento ideal é de 5 '35 ° C. Mexa suavemente antes de usar. Mantenha longe de materiais incompatíveis. Use dentro da vida útil declarada do fabricante para manter o desempenho. |
| Prazo de validade | Prazo de validade: 12 meses a partir da data de produção quando armazenado selado a 5 graus 35 ° C, protegido do congelamento e da luz solar direta. |
CW FS-Emulsão VAE competitivo para aplicações de substrato flexíveis preços 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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Telefone: +8615380400285
E-mail: sales2@liwei-chem.com
Pagamento flexível, preço competitivo, serviço premium - Consulte-nos agora!
Aqueous vinyl acetate-ethylene (VAE) copolymer dispersions designed for flexible substrate adhesion occupy a distinct rheological and mechanical space, defined by the ratio of ethylene co-monomer incorporated into the backbone. CW FS-Ⅰ VAE Emulsion is a high-solids, carboxylated, internally plasticized dispersion with an ethylene content calibrated to depress the glass transition temperature (Tg) below -15 °C without the addition of external migratory plasticizers. This product code—CW FS-Ⅰ—denotes a grade specifically formulated for machine-applied wet lamination, spray bonding, and knife-over-roll coating onto woven and nonwoven textiles, polyurethane and polyether foams, leather splits, and surface-treated polyolefin films. The absence of alkylphenol ethoxylate (APEO) surfactants in the polymerization process ensures compliance with the restricted substances lists of apparel and footwear brands referencing ZDHC MRSL v3.1. In production environments, the emulsion’s shear-stable microstructure, typical volume-median particle diameter 0.8 µm (determined by laser diffraction per ISO 13320:2020), withstands inline mixing at rotor-stator tip speeds above 15 m/s without coagulation, a failure mode observed in unstabilized acrylic dispersions under the same high-turbulence conditions.
Conventional all-acrylic emulsion polymers designed for flexible laminations typically rely on copolymerized butyl acrylate or 2-ethylhexyl acrylate to depress Tg into the range of -30 °C to -10 °C. Those systems, however, exhibit a pronounced degree of physical entanglement dilution as plasticizer content increases; the resultant loss of cohesive strength manifests as low shear-holding power under sustained dead loads, particularly in vertically hung textile composites exposed to thermal cycling. CW FS-Ⅰ circumvents this trade-off via permanent polyethylene-like segments distributed along the copolymer backbone. The ethylene-rich domains provide low-temperature flexibility while maintaining a gel content after film formation—measured as the insoluble fraction after 24-hour acetone extraction at 23 °C—approaching 85%, compared to 40–60% for a typical linear acrylic of equivalent elongation. This high internal degree of crosslinking arises from controlled post-neutralization metal-ion bridging through the carboxylated functionality, activated at oven temperatures exceeding 110 °C, rather than through external crosslinkers. When paired with a water-dispersible aliphatic polyisocyanate at the lamination nip, the interchain network density raises the ultimate tensile strength of a polyester nonwoven film laminate, tested according to ASTM D882, from 4.2 MPa (neat film) to 7.8 MPa without reduction in elongation at break beyond 15% of the original value.
The emulsion’s minimum film-forming temperature (MFFT), measured by the MFFT-bar method in accordance with ISO 2115:2000, is <0 °C. This property permits cohesive film formation on chilled substrates processed in unheated factories during winter months, eliminating the need for coalescing solvents that would otherwise increase volatile organic compound (VOC) emissions and extend dryer residence times. In accelerated freeze-thaw stability trials based on ASTM D7149-05 with five cycles between -10 °C and +25 °C, viscosity recovery following thaw exceeds 90% of the initial value only when a protective colloid package of partially hydrolyzed polyvinyl alcohol at 0.5–1.0 wt% of formulation solids is incorporated by the end-user prior to bulk storage. Without this additive, irreversible grit formation occurs after the second freeze cycle, leading to coating defects visible on a 50 µm wet-film drawdown bar.
Corona-treated biaxially oriented polypropylene (BOPP) and polyethylene terephthalate (PET) films exhibit surface energies between 38 and 44 mN/m immediately post-treatment, but these values decay within hours due to migration of slip agents and low-molecular-weight oligomers. The anionic surfactant system of CW FS-Ⅰ, dominated by sodium alkyl sulfonates with a critical micelle concentration (CMC) of 0.15 g/L in the serum phase, reduces dynamic surface tension to 32 mN/m at 1 bubble per second as measured by a maximum bubble pressure tensiometer. This value is sustained throughout the pot life of a foamed coating formulation, unlike competitive styrene-acrylic dispersions where surfactant desorption onto pigment surfaces causes surface tension drift of +4 to +6 mN/m within 30 minutes of ink-jet colorant addition, documented during line trials on a 3.2 m wide coating head. The resulting continuous film on untreated polyolefin surfaces, verified by a water-break-free test per ISO 8296:2003, reduces the incidence of creeping delamination at edge zones of die-cut gasket materials stored in humid warehouses at 50 °C for 72 hours.
| Property | CW FS-Ⅰ | All-Acrylic (BA-co-MMA) | Styrene-Acrylic (S/MMA/BA) |
|---|---|---|---|
| Solids, wt% | 55 ± 1 | 50 ± 1 | 50 ± 1 |
| pH | 4.5 – 5.5 | 8.0 – 9.0 | 7.5 – 8.5 |
| Brookfield Viscosity, mPa·s (#4/20 rpm) | 1500 – 4000 | 200 – 800 | 300 – 1000 |
| Tg (DSC midpoint, ISO 11357-2), °C | -18 | -15 | +12 |
| MFFT, °C | <0 | 0 | +25 |
| Elongation at break (ASTM D882), % | 600 – 800 | 500 – 700 | 150 – 250 |
| Tensile strength at break, MPa | 4.0 – 6.0 | 2.5 – 4.5 | 8.0 – 10.0 |
| Hot-bar peel adhesion to nylon fabric, N/25 mm (120 °C/30 s) | 22 – 28 | 14 – 18 | 6 – 10 |
CW FS-Ⅰ is supplied with a residual vinyl acetate monomer (VAM) concentration below 500 ppm (gas chromatography, internal method TM-022), meeting the requirements of GB 18583-2008 for indoor decorating and adhesive materials. This low monomer content permits its use in automotive interior carpet backing lines where fogging tests per DIN 75201:2011-11 must not exceed 2.0 mg condensate. Trial data from a production run on a needlepunched PET carpet with a dry add-on of 120 g/m² (single layer) yielded a fogging value of 1.2 mg, well within the specification of a major German OEM. The emulsion is also compatible with foamed latex application via an Oakes foamer; a typical blow ratio of 4:1 with a density of 200 g/L is achievable using ammonium stearate as foam stabilizer without coagulation, provided that the pH is maintained below 7.0 to prevent premature crosslinking of the carboxyl groups.
In high-speed flexographic printing lines for flexible packaging, the same polymer layer often must act as a tie-coat between aluminum foil and low-density polyethylene and, simultaneously, as a receptive surface for solvent-based or UV-curable inks. CW FS-Ⅰ exhibits a surface energy of 44–46 mN/m after film formation and corona post-treatment at 2.0 kW, measured using test inks in accordance with ASTM D2578-17. This level remains stable for up to 72 hours under controlled conditions of 23 °C/50% RH, allowing roll re-wind without blocking. The adhesive’s polar carboxyl groups provide specific adhesion to aluminum oxide layers; lap shear specimens prepared from aluminum foil bonded with CW FS-Ⅰ at a coat weight of 3 g/m² dry and heat-sealed at 140 °C for 2 seconds under 3 bar pressure gave a median shear strength of 2.4 MPa (n=12, standard deviation 0.3 MPa). Competitive aqueous polyurethane dispersions achieve comparable values, but at raw material costs typically 200–250% higher per kilogram of dry solids, and with significant sensitivity to carbonate hardness in dilution water that requires on-line deionization, a capital investment not universally available at converter sites.
In foam-to-foam bonding for furniture cushion assembly, the emulsion’s high wet tack—quantified as a loop tack value of 8–12 N/25 mm on open-cell polyurethane foam (25 kg/m³) within 15 seconds—prevents slippage during indexing on automated contour cutting tables. The plasticizer-free composition ensures that bond lines in contact with expanded polystyrene (EPS) foam do not induce stress cracking; in a modified constrained-dish test following EN 13707:2004 principles, CW FS-Ⅰ applied at 180 g/m² to EPS sheets caused no visible degradation after 28 days of static loading at 50 °C, whereas a conventional dibutyl phthalate-plasticized acrylic alternative produced cracking within 72 hours at the same load.
| Parameter | Specification Range | Test Method |
|---|---|---|
| Total solids | 54.0 – 56.0 wt% | ISO 3251:2019 (105 °C/3 h) |
| pH | 4.5 – 5.5 | ISO 976:2013 |
| Viscosity (Brookfield LV #4/20 rpm, 25 °C) | 1500 – 4000 mPa·s | ISO 2555:2018 |
| Particle size, D50 | 0.5 – 1.5 µm | ISO 13320:2020 |
| Residual VAM monomer | <500 ppm | GC-headspace (internal TM-022) |
| MFFT | <0 °C | ISO 2115:2000 |
| Coagulum on 100 µm screen | <50 mg/kg | ASTM D7148-19 |
An operational limitation that must be strictly observed involves the interaction with polyvalent cations during letdown or tinting. Addition of zinc oxide or magnesium hydroxide dispersions to raise pH above 7.0 triggers immediate colloidal instability, manifesting as an abrupt viscosity increase exceeding 100,000 mPa·s within 60 seconds, a behavior confirmed on a plant-scale Cowles disperser equipped with a 400 mm diameter blade at 900 rpm. Consequently, any formulation adjustment requiring alkaline buffering must be performed exclusively with volatile amine bases, preferably 2-amino-2-methyl-1-propanol (AMP-95) at concentrations not to exceed 0.3 wt% on total formulation. Additionally, the emulsion should not be processed in direct contact with iron or copper alloys without a protective lining; extracted ferric ions from a worn stainless-steel pump stator were found to nucleate microgel seeds, increasing the filtered residue after 48-hour recirculation by a factor of 15 compared to a passivated 316L system. For maximum mechanical stability in continuous dispensing loops, the manufacturer recommends a peristaltic pump with Marprene tubing and a pulsation dampener set to 0.2 bar back pressure.
