CCP PVA BF-14W'nin
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CCP PVA BF-14W, hidroliz seviyesi ve çözüm viskozitesinin belirli aralıklarda kontrol edilmesi gerektiği formülasyonlarda tipik olarak kullanılır.
Spesifikasyonlar
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HS Kodu
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651297
|
| ürün Adı |
CCP PVA BF-14W'nin |
| Kimyasal Adı |
polivinil alkol |
| Cas Numarası |
9002-89-5 |
| Dış Görünüş |
Beyaz ile açık sarı toz /granül |
| Viskozite |
14 ± 1,5 mPa·s (% 4 su çözümü, 20 ° C) |
| Hidroliz Derecesi |
88 ± 1 mol% |
| Ph |
5.0-7.0 (% 4 sulu çözüm) |
| Kül Içeriği |
≤ %1,0 |
| Uçucu Içerik |
≤ %5,0 |
| Çözünürlük |
Sıcak suda çözünür; Organik çözücülerde pratikte çözünmez |
Akrediteli bir CCP PVA BF-14W'nin fabrikası olarak, katı kalite protokolleri uyguluyoruz - her seri tutarlı etkinlik ve güvenlik standartlarını sağlamak için katı testlerden geçer.
Paketleme ve Depolama
| Paketleme |
CCP PVA BF-14W, güvenli depolama için nem geçirmez bir polietilen astarı ile 25 kg çok duvarlı kağıt torbalarda tedarik edilir. |
| Konteyner Yükleme (20' FCL) |
20 'FCL: CCP PVA BF-14W paletli torbalarda yüklenmiş, güvenli bir şekilde saklanmış, tam konteyner, ortak yükleme yok. |
| Nakliye |
CCP PVA BF-14W, bir polivinil alkol reçinesi, sıklıkla paletleştirilmiş ve konteynerleştirilmiş mühürlü çok katmanlı kağıt veya polietilen kaplı torbalarda tehlikeli olmayan malzeme olarak gönderilir. Taşıma sırasında nem, nem ve doğrudan güneş ışığından koruyun. Ürün kalitesini korumak için aşırı sıcaklıklardan kaçınmak için serin, kuru, iyi havalandırılmış bir alanda saklayın. |
| Depolama |
CCP PVA BF-14W'yi soğuk, kuru, iyi havalandırılmış bir alanda sıkıca kapalı bir orijinal konteynerde saklayın. Ne ve nemden koruyun, çünkü ürün suyu emir. Isıdan, açık alevlerden, güçlü oksidatörlerden ve doğrudan güneş ışığından uzak durun. Orta sıcaklıkları koruyun, donmadan kaçının ve konteynerin hasar görmediğinden veya sızmadığından emin olun. |
| Raf ömrü |
Raf ömrü, mühürlenmiş, kuru ve oda sıcaklığında saklanırsa üretimden itibaren 12 aydır. |
CCP PVA BF-14W'nin Uygulaması
Yüksek hızlı oluklu astar üretiminde 100% geri dönüştürülmüş eski oluklu kaplar (OCC), yüzey boyutlama nişasta alımı tek başına nadiren hafif 110 g/m² levhalarda 35 g/m2'nin altındaki Cobb 60 değerlerini düşürür - özellikle de geri su iletkenliği 3 500 µS/cm'yi aştığında ve levha yüzey enerjisi çok değişken hale gelir. Oksidleştirilmiş mısır nişastasının 2.5-4.0% (toplam boyutlu katı maddelerde) polivinil alkolü olan sinerjik bir karışımı BF-14W, su emimini 18-24 g/m2'ye kadar 12-15% hacim konsantrasyonunda ve 55-60 °C'de bir Valmet OptiSizer veya Bellmer film presi ile uygulandığında düşürür. PVA 15-18% katı maddelerde 95°C'de 30 dakika boyunca buhar enjeksiyonu pişirme kullanarak ayrı bir yapım kaymasında önceden çözünür, 100µm torba filtresinden filtrelenir ve oksitlenmiş taşıyıcının termal bozulmasını önlemek için nişasta tedarik hattına enzim dönüşümünden sonra ölçülür. Pres tabanındaki pH, seyreltilmiş NaOH ile 6.2-7.0 seviyesinde tutulur; 5.8 altındaki gezi, kalan kağıt yapımı alumunun varlığında kısmen hidroliz edilmiş PVA'nın yerleştirilmiş yağışımına neden olur. Ölçüm çubuklarındaki film bölünme deseni, %1.8 ağırlığının üzerindeki PVA içeriğinde daha eşit bir transfere doğru kayar, makine hızlarının üzerindeki 1 200 m/dakika'da sislemeyi azaltır. Makine dışında, tipik ölçülen Cobb 60 (ISO 535:2014) 115 g/m² testliner, %32-38 g/m²'den 17-22 g/m²'ye düşürken iç bağlama gücü (TAPPI T 541 om-21) %30-45% iyileşir ve IGT yüzey seçme direnci (TAPPI T 499 su-19) 1.2 m/s'den 1.9 m/s'ye düşük viskoziteli mürekkep ile hareket eder. Anahtar bir operasyonel kısıtlama: kurutucu bölümünün yüzey sıcaklıkları ilk iki boyuttan sonraki silindirde 125°C'yi aştığında, kabukta PVA kömürünün yavaş yavaş birikimi gözlemlenir ve her 46 saatte bir çevrimiçi doktor bıçağı temizliği gerektirir. Ekleme oranı da, mobilya %15'ten fazla kül taşıması içerirse yeniden ayarlanmalıdır, çünkü kalsiyum karbonat inceleri PVA yapışma alanları için rekabet eder ve film oluşturma verimliliğini azaltır. Katyonik poliakrilamid ıslak dayanıklı katkı maddeleri aynı büyüklükte devreye girmemelidir; pilot ölçekli çalışmalar, eş eklemeden 20 dakika içinde anında aglomerasyon ve pres-rulo kirlenmesini göstermiştir.
Ücretsiz Alıntı
Rekabetçi CCP PVA BF-14W'nin bütçenize uygun fiyatları - esnek şartlar ve her sipariş için özelleştirilmiş teklifler.
Örnekler, fiyatlandırma veya daha fazla bilgi için lütfen bizimle iletişime geçin
+8615380400285
veya mail atın
sales2@liwei-chem.com.
Size en kısa sürede cevap vereceğiz.
Tel: +8615380400285
E-posta: sales2@liwei-chem.com
Soruşturma
Ücretsiz fiyat teklifi alınAnhui Liwei Chemical Co., Limited.
Esnek ödeme seçenekleri, rekabetçi fiyatlar, üstün hizmet - Hemen bilgi alın!
Sertifikasyon ve Uyumluluk
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CCP PVA BF-14W'nin ISO 9001 kalite sistemi kapsamında üretilmekte olup ilgili yasal düzenlemelere uygundur.
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COA, SDS/MSDS ve ilgili sertifikalar talep üzerine temin edilebilir.
Sertifika talepleri veya sorularınız için lütfen iletişime geçin: sales2@liwei-chem.com.
Daha fazla tanıtım
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.
