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High-Stability Anionic Rosin Sizing Agent LY-ARS for Challenging Water Conditions

LY-ARS is a premium-grade anionic high-dispersion rosin sizing agent engineered using high-efficiency polymer emulsifiers to address intense thermal and water hardness challenges in pulp mills. Developed with advanced manufacturing processes, this sizing agent transforms pure rosin into a highly uniform, ultra-fine emulsion containing nearly 100% free rosin acid molecules.

Designed as a drop-in replacement for traditional saponified or fortified rosin sizes, LY-ARS excels in systems plagued by high-calcium/magnesium water hardness or elevated summer stock temperatures. It maximizes fiber-to-rosin retention while slashing overall chemical costs and minimizing wet-end drainage pollution.

Technical Specifications & Parameters

Property / Indicator	Technical Standard
Appearance	Milky white liquid
Solid Content	≥ 40.0%
Density	1.02 – 1.04 g/cm³
Viscosity (25°C)	≤ 50 mPa·s
pH Value	5.5 – 6.5
Ionic Charge Type	Anionic
Solubility	Readily dissolves in cold water

Core Technical Advantages & Value Proposition

1. Hard-Water Resilience & High Whitewater Adaptability

In closed-loop papermaking systems, recycling whitewater dramatically concentrates electrolyte ions, typically leading to the premature precipitation of conventional sizing agents. LY-ARS is uniquely formulated with a specialized polymer protective colloid. This shields the emulsion particles, maintaining exceptional mechanical and chemical stability even under extreme water hardness and tightly closed whitewater circulation loops.

2. High-Temperature Sizing Without “Summer Sizing Barriers”

As stock temperature rises during peak summer months, standard saponified rosin soaps often suffer from accelerated hydrolysis, resulting in sizing degradation or sticky deposits on wires and felts. Thanks to its high free-rosin concentration and high-softening-point matrix, LY-ARS retains its precise film-forming properties without economic loss or barrier obstacles under hot summer operating conditions.

3. 50% Alum Savings vs. Traditional Rosin Soap

Traditional saponified rosin relies heavily on a large excess of aluminum sulfate to fix the resin soap onto the fibers. Because LY-ARS features an engineered ultra-fine particle size and uniform charge distribution, it optimizes spatial placement on the fiber surface. This efficiency reduces aluminum sulfate consumption by approximately 50% compared to standard soap sizing, lowering total chemical costs and slowing down acid-induced paper degradation.

4. Zero Stratification & Long-Term Operational Safety

The inclusion of premium polymer surfactants prevents agglomeration and settlement over extended storage periods. Mills benefit from a trouble-free shelf life with no precipitation or curdling, translating to smooth feeding lines, clean metering pumps, and an elimination of paper spots or holes caused by chemical agglomerates.

Application & Dosage Guidelines

To maximize retention and achieve a precise Cobb value, implement the following operational steps:

• Dilution: The product can be dosed as a neat concentrate or pre-diluted with cold water at a ratio of 5:1 or higher.
• Addition Method: Best managed via continuous addition utilizing a precise chemical metering pump into the stock approach flow system. It is highly versatile and fully compatible with all common pulp types.
• Addition Sequence (Reverse Sizing):
  1. Add the aluminum sulfate first into the stock flow to establish the required anchoring sites.
  2. Adjust and monitor the system pH to a target range of 4.5 – 5.0 (the optimal window for alum-rosin flocculation).
  3. Introduce the LY-ARS emulsion, ensuring thorough, uniform blending before the stock hits the forming wire.

Product Applications

LY-ARS is highly recommended for multi-scenario production lines requiring dependable barrier properties against water penetration, including:

• Food Packaging Board: Cup paper, liquid packaging board (LPB), and premium food-grade cardboards.
• Industrial & Commercial Packaging: Linerboards, corrugating mediums, and high-performance kraft boards where wet-end system dynamics undergo heavy closed-loop water recirculation.

Packaging, Storage & Handling

• Packaging: Dispatched in 200 kg plastic drums or 1,000 kg IBC tote tanks to accommodate automated pulp chemical handling infrastructures.
• Storage Environment: Maintain under pristine warehouse conditions between 5°C and 30°C. Keep protected in a cool, dry, and well-ventilated space. Protect against freezing conditions and intense direct sunlight exposure.
• Shelf Life: 3 months from production date under sealed, non-opened conditions.