Wet‑Strength Agent

2026-08-21 15:34

Ⅰ. Brief Introduction

Wet‑strength agent is a common functional additive for papermaking. Its core function is to prevent paper from disintegrating when exposed to water or moisture, retaining 20%‑50% of its original dry strength, while ordinary wet paper retains less than 5%. It forms water‑resistant cross‑linked structures with paper fibers to maintain wet‑state strength.

Main Types

  1. PAE (market‑leading)：Formaldehyde‑free, permanent wet strength, suitable for most paper grades, accounting for over 70% of domestic market. Widely used in food‑contact packaging, tissue paper and medical‑grade paper. Drawback: trace organic halogen residues requiring compliance control.

  2. GPAM：Temporary wet strength, easy repulping for recycling, mainly for flushable toilet paper with better environmental performance.

  3. Formaldehyde‑containing types (MF/UF)：Low‑cost, formaldehyde‑releasing, poor environmental performance. Only used in small quantities for low‑grade paper and being phased out.

  4. Bio‑based wet‑strength agent：Degradable and eco‑friendly. Still under promotion with relatively high cost.

Main Applications: facial tissue, tea‑bag paper, food‑contact packaging paper, medical‑grade paper, industrial filter paper, fruit‑bag paper, etc.

Ⅱ. Latest Industry News (2025‑2026)

  1. New standards implemented: New national standard for wet‑strength agents takes effect, strictly controlling PAE residues, AOX and heavy‑metal indicators. Supervision on food‑contact paper is tightened; low‑end products with high residues or formaldehyde are phased out rapidly.

  2. Technical upgrading: New‑generation low‑residue PAE and modified GPAM gain wide application, balancing wet‑strength performance and environmental friendliness, reducing harmful by‑products and improving waste‑paper recyclability.

  3. Industry trend: Environmental‑friendliness, zero‑residue and easy‑recycling become core directions. Bio‑based green wet‑strength agents are hot R&D focuses. Market concentration rises; leading enterprises expand intelligent and eco‑friendly production lines.


声明：此篇为 Shandong Yongsheng Chemical Co., Ltd. 原创文章，转载请标明出处链接： https://www.sdyshx.com/en/sys-nd/517.html
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