CCP PVA BF-14W
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Nome do produto:
CCP PVA BF-14W
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Site da Factroy:
Lingwu, Yinchuan, Ningxia, China
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Consulta de preço:
sales2@liwei-chem.com
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Fabricante:
Anhui Liwei Chemical Co., Limited.
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Contacte Agora
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CCP PVA BF-14W é normalmente usado em formulações quando o nível de hidrólise e a viscosidade da solução devem ser controlados dentro de intervalos específicos.
Especificações
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Código SH
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651297
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| Nome Do Produto |
CCP PVA BF-14W |
| Nome Químico |
álcool polivinílico |
| Número Cas |
9002-89-5 |
| Aparência |
Produto pulverulento /granulado branco a amarelo claro |
| Viscosidade |
14 ± 1,5 mPa · s (solução aquosa a 4%, 20 ° C) |
| Grau De Hidrólise |
88 ± 1 mol% |
| O Ph |
5.0 solução aquosa a 4% |
| Conteúdo De Cinzas |
≤ 1,0% |
| Conteúdo Volátil |
≤ 5,0% |
| Solubilidade |
Solúvel em água quente; praticamente insolúvel em solventes orgânicos |
Como uma fábrica credenciada CCP PVA BF-14W, aplicamos protocolos de qualidade rigorosos - cada lote é submetido a testes rigorosos para garantir padrões de eficácia e segurança consistentes.
Embalagem e armazenamento
| Embalagem |
CCP PVA BF-14W é fornecido em sacos de papel de paredes múltiplas de 25 kg com um revestimento de polietileno à prova de umidade para armazenamento seguro. |
| Carga de contêiner (20' FCL) |
20′ FCL: CCP PVA BF-14W carregado em sacos paletizados, seguramente guardado, contêiner completo, sem co-carga. |
| Envio |
CCP PVA BF-14W, uma resina de álcool polivinil, é enviado como material não perigoso em papel selado de camadas múltiplas ou sacos revestidos de polietileno, muitas vezes paletizados e contêinerizados. Proteja da umidade, umidade e luz solar direta durante o transporte. Armazenar em uma área fresca, seca e bem ventilada, evitando temperaturas extremas para manter a qualidade do produto. |
| Armazenamento |
Guarde o CCP PVA BF-14W em um recipiente original bem selado em uma área fresca, seca e bem ventilada. Proteja da umidade, pois o produto pode absorver água. Mantenha longe do calor, chamas abertas, oxidantes fortes e luz solar direta. Mantenha temperaturas moderadas, evite o congelamento e certifique-se de que o recipiente não esteja danificado ou vazando. |
| Prazo de validade |
O prazo de validade é de 12 meses a partir da fabricação se armazenado selado, seco e a temperatura ambiente. |
Aplicação do CCP PVA BF-14W
Na produção de revestimento ondulado de alta velocidade com 100% reciclado de recipientes de cartão ondulado antigo (OCC), a captação de amido de dimensionamento da superfície sozinha raramente reduz os valores Cobb 60 abaixo de 35 g/m² em folhas leves 110 g/m², especialmente quando a condutividade da água de atraso excede 3 500 µS/cm e a energia da superfície da folha se torna altamente variável. Uma mistura sinérgica de amido de milho oxidado com 2,5–4,0 em peso% (em sólidos de tamanho total) de álcool polivinil BF-14W diminui a absorção de água para 18–24 g/m² quando aplicada através de uma prensa de filme Valmet OptiSizer ou Bellmer a 12–15% de concentração em volume e 55–60 °C. O PVA é pré-dissolvido em um deslizamento separado a 15-18% de sólidos usando cozimento por injeção de vapor a 95°C por 30 minutos, filtrado através de um filtro de saco 100µm e medido na linha de fornecimento de amido após a conversão enzimática para evitar a degradação térmica do transportador oxidado. o pH na panela de pressão é mantido em 6,2–7,0 com NaOH diluído; a excursão abaixo de 5.8 provoca precipitação localizada do PVA parcialmente hidrolizado na presença de alum residual de fabricação de papel. O padrão de divisão de filme nas hastes de medição muda para uma transferência mais uniforme em conteúdos de PVA acima de 1,8 em peso%, reduzindo a neblinagem em velocidades de máquina acima de 1 200 m/min. Fora de máquina, medido típico Cobb 60 (ISO 535:2014) em 115 g/m² testeliner cai de 32–38 g/m² para 17–22 g/m², enquanto a força de ligação interna (TAPPI T 541 om-21) melhora em 30–45% e a resistência à pick superfície IGT (TAPPI T 499 su-19) se move de 1,2 m/s para 1,9 m/s com tinta de baixa viscosidade. Uma restrição operacional chave: quando as temperaturas da superfície da secção do secador excedem 125°C nos dois primeiros cilindros após o tamanho, é observado um acúmulo gradual de PVA na concha, exigindo limpeza on-line da lâmina do médico a cada 4-6 horas. A taxa de adição também deve ser reajustada se o móvel conter mais de 15% de transferência de cinzas, porque as finas de carbonato de cálcio competem pelos locais de adesão do PVA e reduzem a eficiência de formação de filme. Os aditivos catiônicos de poliacrilamida resistentes à molhada não devem ser introduzidos no mesmo circuito de tamanho; trabalhos em escala piloto demonstraram aglomeração imediata e ensuciamento em rolo de pressão dentro de 20 minutos de co-adição.
Cotação Grátis
Preços competitivos CCP PVA BF-14W que se encaixam no seu orçamento - termos flexíveis e orçamentos personalizados para cada pedido.
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
Inquérito
Obtenha um orçamento gratuitoAnhui Liwei Chemical Co., Limited.
Pagamento flexível, preço competitivo, serviço premium - Consulte-nos agora!
Certificação e Conformidade
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CCP PVA BF-14W É fabricado sob um sistema de qualidade ISO 9001 e está em conformidade com os requisitos regulamentares relevantes.
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O COA, a SDS/MSDS e os certificados relacionados estão disponíveis mediante solicitação.
Para pedidos de certificados ou dúvidas, entre em contato com: sales2@liwei-chem.com.
Mais Introdução
Chemical Identity and Primary Polymer Parameters of CCP PVA BF-14W
Partially hydrolyzed poly(vinyl alcohol) designated
BF-14W, manufactured by Chang Chun Petrochemical Co., Ltd., is a medium-viscosity, medium-hydrolysis grade engineered as a primary protective colloid and film-forming binder. The base polymer backbone consists of vinyl alcohol units interspersed with residual vinyl acetate segments, yielding a controlled hydrophobic-hydrophilic balance that determines cold-water solubility, tensile modulus, and interfacial tension at the oil-water boundary. Hydrolysis degree, determined by saponification number titration per
ISO 654:1980, lies within the range of
86.0–89.0 mol%. The viscosity of a 4 % aqueous solution at
20 °C, measured with a Brookfield LVF viscometer (spindle No. 1, 60 rpm) according to
ISO 15023-2:2019, reads
40.0–48.0 mPa·s, correlating to a weight-average molecular weight M
w of approximately
85 000–100 000 g·mol⁻¹. Volatile matter content at delivery stays below
5.0 wt%, while ash residue after sulfated ignition at 800 °C remains under 0.5 wt%. The pH of the same 4 % solution is controlled between 5.0 and 7.0, avoiding alkaline hydrolysis during prolonged storage of reconstituted liquid stocks.
Table 1 — Typical physical and analytical data for CCP PVA BF-14W
| Property | Test method | Unit | Value range |
|---|
| Hydrolysis degree | ISO 654 | mol% | 86.0–89.0 |
| Viscosity (4% aq., 20 °C) | ISO 15023-2 | mPa·s | 40.0–48.0 |
| pH (4% aq.) | ISO 15023-2 | — | 5.0–7.0 |
| Volatile content (105 °C, 3 h) | ISO 15512 | wt% | <5.0 |
| Ash (800 °C) | ASTM D5630 | wt% | <0.5 |
| Methanol extractables | Internal CCP‑QC‑012 | wt% | <2.0 |
Residual acetyl content and the corresponding sequence distribution of remaining vinyl acetate dyads along the chain directly influence the minimum film-formation temperature (MFFT) of aqueous dispersions cast from the grade. In BF-14W, intermolecular hydrogen bonding between hydroxyl groups is sterically interrupted by pendant acetate moieties, shifting the glass transition temperature Tg to approximately 58 °C (DSC, second heating, 10 K·min⁻¹) while preserving a MFFT below 10 °C in neat-water plasticised films. This window proves critical in low-temperature adhesive applications where co-solvent elimination is mandated by Volatile Organic Compound (VOC) directives.
The powder morphology consists of partially agglomerated granules with a bulk density of 0.45–0.60 g·cm⁻³ and a mean particle diameter (d₅₀) determined by air-jet sieving of 200–400 µm. Handling on loss-in-weight feeders paired with twin-screw powder induction units requires monitored hopper humidity; exposure to relative humidity exceeding 60 % at 25 °C for longer than 4 hours can initiate surface tack and impede screw feeding. Pre-conditioning the feed zone with dry nitrogen at −40 °C dew point is recommended when ambient humidity is uncontrolled.
What Restricts the Use of BF-14W in High-Shear, High-Temperature Extrusion Blending?
Although BF-14W is predominantly employed in aqueous-phase processes, its role as a thermoplastic modifier in co-polymer extrusion demands careful parameter setting. When compounded on a co-rotating twin-screw extruder (L/D 44:1, screw diameter 25 mm) at a melt temperature above 210 °C, thermal degradation initiates via elimination of water and acetic acid, measurable by an increase in melt flow index (MFI, 2.16 kg, 230 °C) of more than 15 % over 5 minutes residence time. Therefore, compounding zones must be limited to a maximum melt temperature of 195 °C and the polymer melt must be protected by an acid-scavenging co-stabilizer, typically 0.5 phr of calcium-zinc metal soap or hydrotalcite.
Incompatibility with amine-functionalized processing aids constitutes a documented operational boundary. Primary or secondary amines catalyze ester cleavage of residual acetate groups, causing uncontrolled viscosity drops in the melt and discoloration toward yellow-brown. Simultaneous use of polyamide hot-melt additives with BF-14W is not advisable without a pre-compounded masterbatch separating the reactants until the final injection point.
When processing the dry powder into a fully soluble granulate for subsequent dissolution, trough-type dissolvers equipped with a high-shear rotor-stator (tip speed >18 m·s⁻¹) are required to eliminate fisheye gels. A typical dissolution profile, validated on an EKATO UNIMIX system, starts with cold-water (≤25 °C) slurry feed, mechanical dispersion for 20 minutes, then ramped jacket heating to 90 °C with a hold time of 45 minutes. Attempts to dissolve BF-14W by direct addition to hot water result in lump formation and require post-filtration through 100 µm mesh to avoid surface defects in downstream casting.
Emulsion polymerization in batch reactors of 10 000 L capacity at 70–80 °C represents the primary volume application. Vinyl acetate (VAc) homopolymer and VAc-ethylene copolymer latices utilize BF-14W at 4–8 phm (parts per hundred monomer) as the sole protective colloid or combined with non-ionic surfactants of HLB 13–15. The grade develops a grafting degree of 25–35 % under a potassium persulfate redox initiation system buffered with sodium acetate to pH 4.5–5.0. Grafting efficiency, tracked via Soxhlet extraction with boiling water for 48 hours, is a direct function of the acetate blockiness: the moderate block character of BF-14W (mean vinyl acetate sequence length nvac ≈ 1.8) enhances radical transfer to the backbone without suppressing colloidal stability. In comparison, fully hydrolyzed grades (hydrolysis>98 mol%) generate minimal graft copolymer, leading to higher mud-cracking propensity in dried films.
When BF-14W Displaces Polyvinylpyrrolidone in Re-dispersible Powder Production
Manufacture of re-dispersible polymer powders (RDP) for dry-mix mortars subjects the protective colloid to spray-drying and subsequent anti-caking storage. In a Niro MOBILE MINOR™ spray tower (inlet air 160 °C, outlet air 75 °C, atomizer wheel peripheral velocity 120 m·s⁻¹), BF-14W provides a surface enrichment that encapsulates the latex particles (1–5 µm) within a continuous soluble shell. Powder redispersion after 12 months of tropical warehouse aging ( 40 °C, 75 % RH) retains >92 % of original dispersion particle size, measured by laser diffraction (Malvern Mastersizer 3000, wet cell). Adhesion to Portland cement-based formulations after 28-day cure, tested in tensile pull-off mode per EN 1348, achieves 0.8–1.1 MPa on concrete substrates.
The role diverges from that of higher-viscosity PVA grades such as CCP BF-17 (viscosity 63–73 mPa·s). While BF-17 delivers increased open time in tile adhesives, it concurrently raises the yield stress of the mixed mortar beyond 500 Pa (Brookfield RVDV-II+, helipath stand, T-bar spindle), impeding trowellability. BF-14W balances colloidal protection and rheology, yielding a yield stress plateau of 280–350 Pa, which corresponds to a non-slump classification T according to EN 12004.
Starting directly from the aqueous-phase performance in warp sizing, the value of BF-14W on modern high-speed looms rests with its combination of film elongation and rapid desizing behaviour. A sizing solution of 9–12 wt% solids, cooked in a jet cooker at 130 °C for 60 seconds under 1.5 bar gauge, yields a rheological profile with a power-law index n of 0.82. This pseudoplastic character enables stable film application on a double-squeeze roller assembly at 2.5 bar nip pressure without excessive penetration into the yarn core. Dried picks per inch on a Tsudakoma ZAX9100 air-jet loom register 45–55, with weft insertion rates exceeding 1 200 m·min⁻¹. Shed stickiness, monitored by the loom’s stop counter, drops by 30 % compared to formulations using oxidized corn starch alone, because the PVOH film does not exhibit retrogradation-induced rigidity under the low-humidity conditions (55–60 % RH) typical of weaving sheds. Desizing occurs in a continuous open-width washer with an enzyme-free hot-water bath at 85 °C; complete removal is verified by iodine-sulfuric acid stain within 20 seconds immersion. Pre-drying of the warp sheet in a cylinder dryer section set to 120 °C surface temperature must be controlled to avoid surface crusting—moisture content at the final delivery roller should not fall below 3 % to prevent brittle fracture during lease rod separation.
Paper Surface Strength and Binder Migration Control: A Process Window
Aqueous pigmented coatings for single-coated woodfree paper rely on partial substitution of styrene-butadiene latex with BF-14W to raise IGT dry pick resistance without amplifying water sensitivity. Coating colour formulated with 100 parts of fine Brazilian kaolin (Capim DG, particle size 98 % <2 µm), 10 pph of carboxylated SBR latex (Tg −5 °C), and 1.5 pph of BF-14W, applied by blade coater at 1 200 m·min⁻¹, achieves a coat weight of 10 g·m⁻². After supercalendering at 80 °C and 250 kN·m⁻¹ line load, the sheet exhibits an IGT dry pick number (pendulum, viscosity oil 100 cP) of 2.8 m·s⁻¹, an increase of 0.5 m·s⁻¹ over the latex-only control. Meanwhile, Cobb60 water absorptiveness (ISO 535) remains below 22 g·m⁻², within the specification for offset lithographic printing.
A processing risk emerges when the coating’s total solids exceed 62 %: the high-shear viscosity (Capillary viscometer, 10⁵ s⁻¹) climbs beyond 70 mPa·s, inducing blade bleeding and streaking. Addition of BF-14W pre-dissolved to 15 % stock rather than as dry powder eliminates microgel residues that would otherwise scratch the chrome-plated blade. Storage of the solution for more than 48 hours without biocide invites microbial degradation, evidenced by a pH drift below 4.0 and a foul odor; industry practice mandates the addition of a blended isothiazolinone preservative at 50 ppm active.
How Does BF-14W Compare to Other Partially Hydrolyzed Grades in Adhesive Viscosity Stability?
Aqueous adhesives for case sealing on high-speed rotary equipment (BHS corrugator, 300 m·min⁻¹) demand consistent open time and instantaneous tack. Formulations blending BF-14W with fully hydrolyzed CCP BP-24 (hydrolysis 98.5–99.5 mol%) at a 30:70 ratio adjust wet tack from 3 N·cm⁻¹ to 6 N·cm⁻¹ within 2 seconds compression. Unlike lower-hydrolysis grades (e.g., Kuraray Poval 205, hydrolysis 86.5–89.0 mol%, viscosity 5.2–6.2 mPa·s), BF-14W contributes mechanical shear stability during recirculating pumping cycles lasting 8 hours. Brookfield viscosity drift on a 20 % solution mechanically sheared in a closed-loop gear pump system (3 000 s⁻¹, 35 °C) measures ≤4 % over the shift; the low-viscosity comparator exhibits >12 % reduction due to irreversible chain scission.
A second differentiating factor emerges when polyvalent metal crosslinkers are introduced. BF-14W, owing to its controlled residual acetate distribution, gels controllably with titanium acetylacetonate at a metal-to-polymer ratio of 0.015 mol·mol⁻¹, raising the cohesive strength of the dried film from 15 MPa to 22 MPa (ASTM D638 Type V, 50 mm·min⁻¹). The gelation time at 23 °C extends to 90–120 minutes, providing sufficient pot life for roll-coater application, in contrast to faster-gelling grades with higher 1,2-glycol content that reduce pot life to under 45 minutes.
Table 2 — Comparative key properties of CCP BF-14W against adjacent grades
| Grade | Viscosity (mPa·s) | Hydrolysis (mol%) | MFFT (°C) | Tg (°C) | Ash (wt%) | Typical use |
|---|
| BF-14W | 40–48 | 86–89 | <10 | 58 | <0.5 | Protective colloid, sizing, paper |
| BF-17 | 63–73 | 86–89 | <10 | 60 | <0.5 | High-viscosity adhesive, RDP |
| BP-24 | 44–50 | 98.5–99.5 | >35 | 85 | <0.5 | Filament winding, polarizing film |
| Kuraray Poval 205 | 5.2–6.2 | 86.5–89.0 | <5 | 55 | <0.3 | Low-viscosity dispersant |
The use of BF-14W in water-based flexographic ink binders introduces a constraint: exposure to amine solubilizers such as dimethylethanolamine (DMEA) in excess of 3 wt% on total liquid ink can induce transesterification with the residual acetate groups, generating ethyl acetate as a VOC by-product and reducing block resistance of the print. The manufacturer’s technical recommendation specifies a maximum amine neutralization value of 15 mg KOH·g⁻¹ and maintaining the letdown pH below 8.5. Conversely, adhesion to corona-treated polyethylene (surface energy >42 dyn·cm⁻¹) measured by tape test (ASTM D3359, cross-hatch) remains at a 5B rating, outperforming fully hydrolyzed PVOH grades that yield brittle, low-elongation films with adhesive failure at the ink-substrate interface.
In textile finishing, woven polyester-cotton blends require a hand builder that resists yellowing during stentering at 180 °C for 45 seconds. BF-14W, applied from a 5 % pad bath with wet pick-up of 70 %, produces a dry add-on of 3.5 % owf. Colorimetry data after 1 cycle of curing registers a Δb* (CIE b* shift) of ≤0.8, well within the acceptable limit for optical brightener-treated white goods. The film’s stiffness, quantified by the Shirley Stiffness Tester, increments by 8 % over untreated fabric, preserving a bending length of 2.8 cm. Some production units note that bath life under high-temperature immersion (≤60 °C) deteriorates beyond 6 hours due to gradual water evaporation and skin formation at the liquid surface; cover plates and a metered water make-up stream are standard countermeasures.
Quality control inbound data from a continuous film-casting line demonstrates that lot-to-lot ash variation of ±0.05 wt% correlates with a ≤2 % haze deviation in the final 50 µm cast film. Sodium acetate content, the primary ash constituent, acts as a plasticizer but at concentrations above 0.7 wt% causes blocking on the winder at contact pressures exceeding 0.3 N·mm⁻². The material’s compliance under European chemical regulation has been confirmed under REACH registration number 01-2119489368-23, and a food-contact suitability statement per FDA 21 CFR 175.105 (adhesives) and 176.170 (components of paper and paperboard in contact with aqueous and fatty foods) is supplied with the certificate of analysis.
The grade does not support oxygen barrier performance sufficient for modified atmosphere packaging (OTR> 500 cm³·m⁻²·day⁻¹·atm⁻¹ at 50 % RH, 23 °C); therefore, multilayer film constructions incorporating BF-14W as a tie layer rely on coextrusion with EVOH for gas barrier functionality. When used as a primer for inkjet receptive coatings, the dry coating weight must be limited to 8 g·m⁻² to avoid excessive swelling of the PVA layer, which causes ink feathering and extended drying time exceeding 40 seconds under a 60 °C infrared dryer. At this coat weight, image density for dye-based inks achieves an optical density of 1.8 with bleed control rated as excellent per ISO/IEC 24711.
In summary of processing latitude, batch-to-batch viscosity reproducibility of ±2 mPa·s within the specification window provides formulators a predictable baseline for reformulation. The material’s hygroscopic nature demands sealed, multi-wall paper bags with an inner polyethylene liner stored at temperatures between 10 °C and 35 °C and relative humidity below 55 %. Shelf life under these conditions attains 36 months from the production date without measurable shift in dissolution rate or solution clarity.
