| HS Code | 145212 |
| Product Name | Sundy PVA 088-03 (Sinopec PVA 088-03 / PVA 0388) |
| Appearance | white granular powder |
| Degree Of Hydrolysis | 88 mol% |
| Average Degree Of Polymerization | 800 |
| Viscosity 4 Percent Solution 20c | 2.8-3.5 mPa·s |
| Ph 4 Percent Solution | 5.0-7.0 |
| Molecular Weight | approximately 35000-40000 |
| Volatile Content | ≤5.0% |
| Ash Content | ≤0.5% |
| Bulk Density | 0.4-0.6 g/cm³ |
| Solubility | soluble in water |
| Solubility Temperature | cold water soluble |
As an accredited Sundy PVA 088-03 (Sinopec PVA 088-03 / PVA 0388) factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Sundy PVA 088-03 is packaged in 25 kg net woven polypropylene bags with polyethylene inner liners for safe handling. |
| Container Loading (20′ FCL) | 20′ FCL, 25kg kraft bags on pallets, about 20 metric tons per container, secured and ventilated for safe transport. |
| Shipping | Sundy PVA 088-03 (Sinopec PVA 088-03 / PVA 0388) is shipped as a non-hazardous white powder in 25 kg moisture-proof bags on pallets. Protect from humidity, heat, and direct sun. Keep dry and clean during transit; avoid dust generation. No special transport classification, but use standard handling precautions. |
| Storage | Store in a cool, dry, well-ventilated area away from heat, sparks, and open flames. Keep containers tightly sealed to prevent moisture absorption and contamination. Protect from direct sunlight and incompatible materials. Avoid generating dust. Maintain moderate temperatures and low humidity. Follow manufacturer guidelines for shelf life and handling. |
| Shelf Life | Shelf life is typically 2 years when stored in a cool, dry, sealed environment away from moisture and heat. |
When formulating polyvinyl acetate homopolymer emulsions for D3/D4 wood adhesives under EN 204/DIN EN 204, the addition of 3.2–4.8 wt% (based on total vinyl acetate monomer) of partially hydrolyzed Sundy PVA 088-03 as sole protective colloid produces a shear-stable latex with a final viscosity of 8,000–18,000 mPa·s (Brookfield RVT, spindle 6, 20 rpm) at 54–56% solids. The 87.0–89.0 mol% hydrolysis degree and 3.0–4.0 mPa·s (4% aqueous, 20°C) solution viscosity enable cold-water solubility at 10–15°C without prolonged heating, which prevents monomer boil-out during semi-continuous addition at 65–72°C jacket temperature. A pre-dissolution tank with axial turbine agitation disperses the PVA granules into deionized water at 20–25°C to form an 8–10 wt% stock solution; the aqueous phase is then charged into a glass-lined reactor equipped with a two-stage anchor/impeller agitator (60–80 rpm). A tert-butyl hydroperoxide/sodium formaldehyde sulfoxylate redox initiation system is fed concurrently with the delayed monomer stream at 68–70°C to maintain a low level of unreacted vinyl acetate (<0.5 wt%) before final vacuum stripping at 50–60 mbar. The resulting adhesive films exhibit a wet shear strength >2.5 N/mm² after 4-hour cold-water soak (DIN EN 204 D3 sequential test), and the residual methanol content is kept below 0.5% to comply with EU Ecolabel indoor emission class A+.
Processing boundaries with 088-03 become evident when the protective colloid level drops below 2.8%; particle coalescence during the nucleation phase increases the coarse grit count (> 100 µm on a 40-mesh screen) above 250 mg/L, rendering the emulsion unsuitable for clear film laminating adhesives. Conversely, exceeding 5.5 wt% combined with a high-shear post-addition of 0.3% aluminum chloride crosslinker can elevate the minimum film-forming temperature above 15°C, causing edge cracking on chilled rollers at line speeds above 25 m/min. In industrial practice, a measured co-feed of 0.15–0.25 wt% sodium acetate buffer stabilizes the pH to 4.5–5.0, preventing hydrolysis of the acetate groups that would shift the emulsion’s electrochemical double layer and trigger premature flocculation in contact with zinc oxide extenders used in PVC plastisol adhesives.
| Monomer system | 088-03 dosage range (wt% on monomer) | Brookfield viscosity at 25°C (mPa·s) | MFFT ASTM D2354 (°C) | Typical end-product |
|---|---|---|---|---|
| Vinyl acetate homopolymer | 3.2–4.8 | 8,000–18,000 | 12–15 | D3/D4 interior/exterior wood adhesive |
| VAc/VeoVa™10 copolymer (85/15) | 4.0–5.5 | 5,500–12,000 | 7–9 | Masonry paint, elastomeric wall coating |
| VAc/butyl acrylate copolymer (80/20) | 2.8–4.2 | 3,000–7,500 | 2–4 | Removable pressure-sensitive labels, textile laminating |
The secondary dispersant role in vinyl chloride suspension polymerization—typically handled by a low-viscosity partially hydrolyzed PVA alongside a primary high-molecular-weight (70,000–100,000) dispersant—demands strict control of the cloud point temperature and interfacial tension reduction kinetics. Sundy PVA 088-03, dosed at 0.03–0.08 wt% on monomer, extends the initial dispersion of VCM droplets under 0.6–1.2 MPa of autoclave pressure before the primary HPMC or high-hydrolysis PVA (98–99 mol%) stabilizes the grain envelope. The 4% aqueous solution cloud point at 42–46°C provides a thermally labile boundary layer: at 57–63°C polymerization temperature the solubility decreases, allowing controlled graftermiation and a narrow particle size distribution (130–150 µm median diameter, Coulter counter). Plant data from a 30-m³ straight-baffle autoclave (Nippon Carbide-type contour) show that replacing a generic low-DP PVA with 088-03 at 0.055% dosage reduced the population of fine particles (<60 µm) from 8.5% to 3.2%, directly cutting plasticizer absorption time (ASTM D3367, centrifugation method) from 14 min to 10 min for K-value 67 resin. The product must pass the residual acetyl group migration threshold of <0.2 mEq/g to satisfy Japanese JHPA voluntary standards for food-contact PVC containers. A serious operational failure arises if the secondary dispersant solution is held above 55°C for longer than 90 minutes: thermal insolubilization of the syndiotactic-rich segments precipitates a gel deposit on the jacket inner wall, disrupting heat transfer and widening the batch-to-batch K-value drift beyond ±0.8 units.
Rewettable adhesives for envelope flaps, postage stamps, and paper-based packaging tapes rely on a water-soluble film former that dries to a non-blocking layer and re-tackifies within 0.5–1.5 seconds upon contact with a moistened roller. Sundy PVA 088-03 dissolved at 15–20 wt% in a 50:50 water-ethanol cosolvent system with 8–12 wt% glycerol triacetate (triacetin) plasticizer yields a coating compound with a dry curl index of ≤15 mm (TAPPI T566). The enzymatic resistance of 88%-hydrolyzed grades proves critical: dextrin-modified formulations are prone to fungal growth under RH >80%, whereas PVA 088-03 survives an accelerated storage test at 40°C/90% RH for 28 days without visible spore germination when preserved with 0.12% Kathon CG/ICP biocide. The blade-over-roll coating equipment (20–50 g/m² dry coat weight) demands a solution viscosity of 400–800 mPa·s at 23°C; the 3.0–4.0 mPa·s base viscosity of the 088-03 powder allows post-thickening with 0.3–0.6 wt% borax pentahydrate to a final Brookfield value of 600 mPa·s without gelling on the metering roller. A limit emerges when borax content exceeds 0.8%: the di-diol crosslinking transforms the Newtonian flow into a dilatant paste that splashes from the roller at web speeds above 150 m/min, causing uneven banding. From a regulatory standpoint, the dried adhesive fully complies with FDA 21 CFR 175.105 for incidental food contact and EU Plastics Implementation Measure (PIM) for mailings, provided the free vinyl alcohol monomer content is below 0.3 µg/cm² under EN 1186 migration testing.
Alumina and zirconia feedstock granulation for uniaxial dry pressing at 80–120 MPa requires a low-ash temporary binder that decomposes cleanly below 500°C. Sundy PVA 088-03, pre-dissolved at 6–8 wt% in demineralized water and sprayed onto a fluidized-bed granulator (Glatt WSG, inlet air temperature 105°C), coats the ceramic particles with a 0.5–1.2 µm thick film. The binder dosage of 1.8–2.5 wt% (dry basis on total batch) raises the green density to 2.15–2.25 g/cm³ for 96% alumina, and the diametral compression strength (ASTM C1424, specimen diameter 20 mm) reaches 0.8–1.2 MPa, sufficient for automated green machining of turbine blade grooves. During debinding, a multi-step thermal schedule—ramp at 0.3°C/min to 350°C, soak for 2 hours, then accelerate to 480°C—avoids a pressure buildup of volatiles that could generate intergranular laminations visible after sintering. A notable processing incompatibility occurs if the PVA 088-03 solution is blended with ammonium polyacrylate dispersant (Darvan C-N): the carboxyl-ammonium groups react with residual acetate groups to form microgels that clog the 50-µm spray nozzle within 45 minutes of batch running. Replacement with a sodium salt dispersant, or storing the binder and dispersant as separate feed streams, resolves the issue. The total ash residue after burnout is measured at 0.02–0.03 wt% (ISO 21404), well below the 0.1% threshold demanded by technical ceramic manufacturers for electronic substrates, confirming suitability for ISO 9001-certified production lines.
Spun polyester/cotton 45/55 ring yarns of Ne 30–40 that pass through a Sucker S432 two-size-box sizing machine at 60–80 m/min benefit from a size recipe based on partially hydrolyzed PVA when the downstream finishing mill lacks thermal energy for enzymatic or oxidative desizing. Replacing a portion of the standard starch/PVA blend with Sundy PVA 088-03—specifically 6–8% PVA 088-03 on total size solids, combined with 3–4% polyacrylic acid size and a 0.8% tallow-based lubricant—lowers the hot water desizing temperature from 80°C to 25–30°C. The sizing trough temperature is maintained at 88–92°C to dissolve the lubricant but the 088-03 powder pre-blended in a high-speed homogenizer enters solution within 30 seconds, preventing undissolved “fish-eye” particles that score filament surfaces. Weaving efficiency on a Tsudakoma ZAX9100 air-jet loom at 850 rpm is retained above 93%, with size shed drop measured at 12–15 mg per 100 g of loom-state fabric. Post-weaving, the grey fabric is cold-pad-batched with a 0.5% non-ionic wetting agent at 20°C for 6–8 hours, and the water-soluble 088-03 film detaches cleanly; desizing efficiency assessed by ISO 105-C06 staining test exceeds 95%, contrasting with the 55–60% achieved with unmodified starch under the same cold-batch conditions. A critical boundary: 088-03 must not exceed 10% of the size film weight in a high-humidity weaving shed (> 85% RH), as its equilibrium moisture content can swell the size film, causing sticky reattachment on the heald eyelets and filament breakages above 0.5 per 10,000 picks.
Cold-water-soluble packaging film for laundry pods (EN 13592 biodegradation) is cast from a blend where Sundy PVA 088-03 functions as a dissolution rate modifier rather than the primary film-forming polymer. A standard formulation contains 40–50 parts of medium-hydrolysis high-molecular-weight PVA (17-99 or 24-88), 30–40 parts of 088-03, and 15–20 parts of sorbitol/glycerol plasticizer, compounded in a co-rotating twin-screw extruder (L/D 44) at 185–195°C barrel temperature. The inclusion of 088-03 at 35% of the resin weight reduces the film dissolution time in 10°C water from 240 seconds to 65 seconds (ISO 17025-accredited lab protocol, film gauge 38 µm), enabling compliance with the AISE voluntary standard for single-dose capsules. Cast film manufactured on a 1,200 mm wide chill-roll line (SCA-type embossing) must maintain a surface roughness Ra 0.15–0.25 µm; if the 088-03 moisture absorption prior to extrusion exceeds 0.8%, surface micro-bubbles emerge on the roll due to steam cockle, lowering the puncture resistance below 35 g (ASTM F1306, drop cone). Pre-drying the 088-03 granulate in a fluid-bed drier at 60°C to a moisture content of ≤0.12% is mandatory at any ambient relative humidity above 60%. Regulatory alignment includes REACH Annex XVII restrictions on vinyl acetate monomer and the EU Detergent Regulation (EC) No 648/2004 biodegradation primer for all organic components; the 088-03 powder must be accompanied by a certificate of conformity showing >60% mineralization within 28 days in the OECD 301B CO₂ evolution test.
Cast-coated paper and inkjet media receptive layers frequently incorporate a water-soluble binder that withstands rapid infrared gelation without yellowing. A 12 wt% aqueous solution of Sundy PVA 088-03 applied via a bent-blade coater at 1,200 m/min onto 80 g/m² raw base gives a dry pickup of 3.5–4.0 g/m² per side and yields a Dennison wax pick value of 18–20 after calender finishing. The 88% hydrolysis degree presents sufficient hydroxyl sites to crosslink with a 2.5% ammonium zirconium carbonate insolubilizer at 120°C dryer exit air temperature, attaining a wet-rub resistance of 85% brightness retention (ISO 18901, delta density ≤0.03). An operational pitfall occurs during summer when the raw water supply exceeds 28°C: the 12% solution viscosity drops below 20 sec in a #3 Zahn cup, impairing coating transfer and causing skip marks until the tank cooler is engaged to bring the temperature down to 18°C. For direct food-contact paper packaging (BfR Recommendation XXXVI), the specific migration limit for vinyl alcohol oligomers of Mw <1,000 Da must be verified by HPLC-ELSD, and the 088-03 batch must contain <5 ppm of acetic acid to avoid organoleptic taint in dry confectionery packs.
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Sundy PVA 088-03, supplied as a white granular powder by Sinopec Chongqing SVW Chemical Co., Ltd. under the alternate designation PVA 0388, is a partially hydrolysed polyvinyl alcohol (PVA) grade engineered for aqueous applications requiring rapid dissolution kinetics and low solution viscosity. Its 88.0 ± 1.0 mol% degree of hydrolysis, verified by the back‑titration procedure of GB/T 12010.5‑2010, leaves sufficient residual acetate groups to suppress crystallite formation, enabling dissolution in demineralised water at temperatures as low as 20°C. The 3.0–3.5 mPa·s viscosity (4 wt% aqueous solution, 20°C, Brookfield LVDV, spindle UL, 60 rpm, per GB/T 12010.2‑2010) places the grade at the low‑molecular‑weight boundary of the 088‑series, fundamentally distinct from higher‑viscosity analogues such as PVA 088‑05 (5.0–6.0 mPa·s) and PVA 088‑08 (8.0–9.0 mPa·s).
The Sinopec product nomenclature embeds a direct translation of the polymer’s two principal performance axes—degree of hydrolysis and solution viscosity. In the 088‑03 format, the first three digits denote the nominal degree of hydrolysis in mol% (88%), while the suffix ‑03 represents the targeted 4 wt% solution viscosity in millipascal‑seconds. The cross‑reference PVA 0388 adopts an inverted syntax common in certain Asian distribution channels: the initial 03 indicates a mean degree of polymerisation near 300 (consistent with a viscosity of 3.0 mPa·s), and the trailing 88 crystallises the 88 mol% hydrolysis value. This duality means that procurement specifications must explicitly quote the physical property set rather than rely on the trade name alone, because while 088‑03 and 0388 are chemically identical, other Sinopec grades bearing only the 0388 label variant may be associated with minor lot‑to‑lot variability if sourced from different production trains.
When a 4 wt% aqueous solution of the powder is prepared at 20°C on an IKA Eurostar 60 overhead stirrer fitted with a 50‑mm propeller blade operating at 300 rpm, complete granule dispersion is reached within 15 min. Raising the solution temperature to 85°C under constant agitation and holding for a further 30 min eliminates residual microgel particles, producing a clear, low‑haze liquid. A critical failure mode observed in pilot‑scale batching is the formation of sticky, partially hydrated agglomerates when the powder is introduced directly into water above 40°C without pre‑wetting; once formed, these agglomerates resist dispersion even at 95°C and require filtration through a 200 µm mesh to avoid downstream spinneret or coating‑die blockages. The recommended dissolution protocol therefore specifies progressive powder addition into cold water (10–15°C) under high‑shear, using an inline rotor‑stator mixer (such as a Silverson L5 series with a square‑hole high‑shear screen) before transferring the dispersion to a jacketed vessel for the thermal completion step at 85°C. Temperatures exceeding 95°C are avoided, as prolonged exposure in the presence of dissolved oxygen initiates chain scission, manifesting as an irreversible viscosity loss of 8–12% after 60 min at 98°C (monitored via GB/T 12010.2).
Fully hydrolysed PVA grades such as Sinopec PVA 1799 (≥99.0 mol% hydrolysis) possess a high density of interchain hydrogen bonds and develop substantial crystallinity even at room temperature, rendering them insoluble in cold water and requiring heating to 80–90°C for complete dissolution. The 12 mol% residual acetate groups in PVA 088‑03 act as steric defects along the polymer backbone, disrupting the regularity required for extensive crystallite formation and lowering the glass transition temperature (Tg) to approximately 38°C when dry—though in practice, ambient moisture plasticises the material and depresses Tg further. This structural disorder permits water molecules to penetrate the amorphous matrix at ambient temperature, enabling dissolution without heating. At the same time, the residual acetate content imparts a degree of surface activity that improves wetting on hydrophobic substrates, an advantage frequently exploited in fibre‑sizing operations. A consequence of this hydrolytic compromise is that films cast from 088‑03 exhibit a higher equilibrium moisture uptake (10–12% at 23°C / 50% RH, gravimetric determination per ISO 12571) compared with films from fully hydrolysed grades, which typically absorb 6–8% under identical conditioning. This hygroscopic balance must be factored into packaging and storage strategies: re‑wettable goods wrapped in PVA 088‑03‑based film may suffer blocking under high‑humidity warehouse conditions unless the film incorporates a 2‑3 pt phr hydrophobic plasticiser such as glycerol triacetate.
On a ZAX9100 air‑jet weaving machine running at 700 rpm with 40‑s English cotton count warp yarn, a sizing formulation prepared with 9 wt% PVA 088‑03 and 0.5 wt% polyacrylic acid size blend produced a size add‑on of 8.5 ± 0.3%. Under these conditions, loom stop rates measured over 12‑hour shifts remained below 0.8 breaks per beam, an improvement attributed to the grade’s ability to form a flexible, contiguous film that penetrates the yarn inter‑fibre voids without excessive surface deposit. The low viscosity of the cooking liquor—typically 8–12 s efflux time through a 4 mm diameter cup viscometer (DIN‑cup method adapted from DIN 53211)—facilitates uniform pickup across the warp sheet even when the sizing box temperature falls to 60°C during start‑up transients. In contrast, substituting PVA 088‑08 at the same solids loading increases liquor viscosity to 18–24 s and raises the risk of yarn beard adhesion, especially in dense fabric constructions where shed opening is already limited.
| Parameter | PVA 088‑03 (0388) | PVA 088‑05 | PVA 088‑08 | PVA 099‑08 (fully hydrol.) |
|---|---|---|---|---|
| Hydrolysis (mol%) | 87.0–89.0 | 87.0–89.0 | 87.0–89.0 | 98.0–99.0 |
| Viscosity (4%, 20°C, mPa·s) | 3.0–3.5 | 5.0–6.0 | 8.0–9.0 | 8.0–10.0 |
| Approx. DP | 300 | 500 | 700 | 700 |
| Volatile matter (wt%) | ≤5.0 | ≤5.0 | ≤5.0 | ≤5.0 |
| Ash (wt%) | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.5 |
| pH (4% aq.) | 5.0–7.0 | 5.0–7.0 | 5.0–7.0 | 5.0–7.0 |
| Typical film tensile strength (MPa, ISO 527‑3, conditioned 50% RH) | ca. 38–45 | 45–52 | 55–65 | 70–80 |
| Water solubility profile | Soluble at 20°C | Soluble at 20°C | Soluble at 20°C | Requires 80°C |
| Primary process fit | Low‑viscosity sizing, paper surface treatment, emulsion stabilisation | Adhesive compounding, pigment coating binder | High‑speed weaving size, high‑strength adhesive film | Polariser film, hot‑water‑resistant layer, barrier film |
Comparative tensile data presented above reflect solution‑cast films dried at 80°C and conditioned per ISO 291 class 2 atmosphere. The 20–25% step‑down in tensile strength between 088‑08 and 088‑03 is consistent with the reduced chain entanglement density of the lower‑molecular‑weight polymer; in adhesive applications where cohesive strength is not the primary failure mode, the loss is compensated by superior wet‑out and faster dissolution.
| Test attribute | Standard method | Specification range / limit |
|---|---|---|
| Viscosity of aqueous solution (4 wt%, 20°C) | GB/T 12010.2‑2010 (ISO 15023‑2:2019 reference) | 3.0–3.5 mPa·s |
| Degree of hydrolysis | GB/T 12010.5‑2010 | 87.0–89.0 mol% |
| Volatile matter | GB/T 12010.6‑2010 | ≤5.0 wt% |
| Ash content | GB/T 12010.7‑2010 | ≤0.5 wt% |
| pH (4% solution) | GB/T 12010.8‑2010 | 5.0–7.0 |
| Purity (non‑volatile PVA content) | GB/T 12010.4‑2010 | ≥91.5 wt% |
| Heavy metals (total) | CP 2015 (Chinese Pharmacopoeia) or ICP‑OES after digestion | ≤20 mg/kg |
| Regulatory status | – | FDA 21 CFR 175.300 (indirect food contact, coatings), EU 10/2011 migration testing for specific applications; REACH registered |
When used as a protective colloid in vinyl acetate homopolymer and copolymer emulsions at addition levels of 2.0–4.0 wt% based on monomer, the low molecular weight of 088‑03 produces final emulsion viscosities in the range 500–2000 mPa·s (Brookfield RVT, spindle 3, 20 rpm, 25°C). Particle‑size distribution measured by dynamic light scattering (Malvern Zetasizer Ultra) typically yields a Z‑average diameter of 250–450 nm when a staged delayed‑addition surfactant protocol is applied. A production‑scale issue identified on a 5 m³ batch reactor equipped with a pitched‑blade turbine impeller operating at 120 rpm is the onset of shear‑induced coagulation when the free‑PVA concentration in the aqueous phase drops below 0.8 wt% during the later stages of polymerisation. Maintaining a minimum dissolved PVA pool is therefore critical, and low‑viscosity grades such as 088‑03 allow higher overall solids without exceeding the mixing torque limit of the drive system, compared with 088‑08, which would demand a reduction in batch solids to remain processable.
In polyvinyl alcohol‑stabilised wood adhesives formulated for D3/D4 classification under EN 204, PVA 088‑03 is frequently compounded with lignosulfonate or polyphenolic extenders. Adhesive tensile shear strengths on beech substrates conditioned according to the D4 boiling‑water cycle (6 hours in boiling water plus 2 hours in cold water) exceed 1.5 MPa when the 088‑03 content is kept at 12–14 percent of the total liquid formulation. An operational boundary emerges when pH is adjusted below 2.5 with strong mineral acids: acid‑catalysed hydrolysis of the residual acetate groups accelerates, causing a progressive drop in the degree of hydrolysis and a corresponding loss in water resistance after 48‑hour pot storage at 40°C. Conversely, in alkaline systems above pH 10.5, the presence of trace transition‑metal ions from filler extenders (iron above 5 ppm) can catalyse oxidative chain scission, notably if the adhesive is processed in open vessels without nitrogen blanketing. Stable operation is achieved by buffering the liquid phase with a 0.5 wt% sodium acetate/sodium bicarbonate system to maintain pH 5.8–6.5 and by incorporating a chelating agent such as EDTA tetrasodium salt at 500 mg/L.
For paper surface sizing and coating binder pigment‑binding, PVA 088‑03 is applied at 3–6% solution concentration in a size press operating at 40–60°C. A horizontal film‑press on a fine‑paper machine running at 800 m/min demonstrated that substitution of oxidised starch with a 1:1 blend of starch and 088‑03 reduced the Cobb60 water absorptiveness (ISO 535) from 35 g/m² to 22 g/m² without impairing surface strength, as measured by IGT pick velocity (ISO 3783). The low solution viscosity ensures that the reduction in solids‑content difference between the press nip and the applicator bath does not exceed 0.5% over a 6‑hour campaign, minimising corrective additions. Static storage of the prepared size liquor beyond 48 hours at 30°C should be avoided unless a biocidal preservative (e.g., 0.2% sodium pyrithione) is added, because the partially hydrolysed PVA serves as a carbon source for microbial proliferation, leading to odour and slump in viscosity.
When comparing 088‑03 to fully hydrolysed 099‑08 in a melt‑plasticised film extrusion line, the limitation is clear: 088‑03 cannot be processed as a neat thermoplastic because thermal degradation begins near 180°C, well before its crystalline melting point of 196°C. Instead, it must be plasticised with a glycerol‑trimethylolpropane mixture at 20–30 phr to shift the processing window into 160–175°C, which yields blown films with oxygen transmission rates 3–4 times higher than those achievable with 099‑08 under identical conditions (ASTM D3985, 23°C, 50% RH). This higher permeability makes 088‑03 less suitable for barrier packaging but more suitable for water‑soluble laundry bags or release films where rapid dissolution is the primary performance metric.
