Knowledge · PVA 1588
Published 2026 · Ningxia Dadi PVA technical desk
We get asked about Landy PVA 1588 remoistening adhesive almost weekly, usually by formulators burned by an off-spec batch. Below is the grade we ship and how customers really run it.
Landy PVA 1588 is a 88 mol% hydrolysis grade used for remoistening adhesive . Below we cover the real spec we hold, how customers run it, and what to watch on the line.
| Brand | Landy (export brand: Ningxia Landy) |
|---|---|
| Grade / Model | 1588 |
| Product | Polyvinyl Alcohol (PVA) |
| Degree of hydrolysis | 88 mol% |
| Avg. polymerization (DP) | 1500 |
| Viscosity (4% aq., 20C) | grade-specific (see TDS) mPa.s |
| Solubility | partially hydrolyzed |
| China-market code | - |
| CAS / HS code | 9002-89-5 / 39053000 |
| Appearance | white flake, granule or powder |
| Purity | ≥93.0% (grade dependent) |
| pH (4% sol.) | 5-7 |
How it compares
Against 88-series, the 88% hydrolysis grade resists water better but needs hot water to dissolve; against competitors, our ash and volatiles are held tight so lot-to-lot drift is small — the thing emulsion and PVB customers care about most.
From the floor
A stamp/envelope customer uses our low-visc 88-series for gum; a dab of cold water re-tacks, curl solved with a release layer. Our Ningxia Landy QC keeps each lot sampled to expiry, so any issue is traceable.
One tip we always give
In humid climates add a release layer or it curls.
How to run it on your line
Coat 3–6% solution on substrate, dry; activate with water at use.
Why 1588 works for remoistening adhesive
Low-viscosity, partially hydrolyzed 1588 gives a film that re-tacks on light moisture — the classic gummed-tape base.
FAQ
PVA for gummed tape?
Low-viscosity 88-series — tacks with a dab of cold water.
Packaging, MOQ & lead time
25 kg PP woven bag (inner PE); jumbo bag on request. MOQ from 1 MT for stock grades, 16 MT for full container; lead time 7-15 days ex-works Ningxia. Incoterms FOB/CFR/CIF; payment T/T or L/C.
Quality & documents (trust signals)
Every lot is tested on Shimadzu GC-2014C / Agilent AOC-20 GC and Brookfield DV2T viscometer; batch sample kept to expiry. EN TDS, MSDS, COA provided. REACH and ISO 9001 status available on request [verify against current certificate].
About the supplier
Ningxia Dadi Circulation Development Co., Ltd. (PVA branch since 2009; Phase I 50,000 t + Phase II 80,000 t; ~585 staff; ABB robotic palletizing; Shimadzu GC-2014C + Agilent AOC-20 gas chromatographs + Brookfield DV2T viscometer for QC; named a national first-batch green manufacturing demonstration enterprise in 2017; calcium-carbide to VAM to PVA circular chain.
Written by Li Wei, Senior Technical Sales Engineer, Polyvinyl Alcohol Division — Ningxia Dadi Circulation Development Co., Ltd. - 9 years placing PVA grades with textile, adhesive and construction compounders across Southeast Asia, the Middle East and South America. Replies to most inquiries within one business day.
Get a quote / sample
Spec sheets only go so far — the real test is your line. We keep 500 g free samples and full EN TDS/MSDS/COA ready.
