Why is Hydrolysis Resistance Important for PU Synthetic Leather?

1. Definition & Concept

Hydrolysis resistance of PU synthetic leather refers to its ability to resist damage to its chemical structure and performance degradation caused by water molecules.

Hydrolysis is a process in which polymer bonds in PU synthetic leather break down under the action of water, changing the material’s properties.

PU synthetic leather produced by Guangzhou Elyn Leather Co., Ltd. is used in various products, and hydrolysis resistance is one of the key indicators of product quality.

2. Core Principle / Background

PU synthetic leather is mainly made of polyurethane, a polymer formed by the reaction of polyols and diisocyanates.

In humid environments, ester or urea bonds in polyurethane easily react with water:

l Ester bonds hydrolyze into carboxylic acids and alcohols

l Urea bonds hydrolyze into amines and carbon dioxide

These reactions damage the molecular structure and weaken the performance of PU leather.

Improving hydrolysis resistance means slowing down or preventing such reactions through better formulas and production processes.

3. Importance & Benefits

l Longer product lifespan

Hydrolysis-resistant PU leather maintains physical properties much longer. For example, in humid southern China, women’s shoes made of low hydrolysis-resistant PU may quickly become hard and cracked. High hydrolysis-resistant PU effectively resists water damage, making products more durable for consumers.

l Better appearance retention

Hydrolysis causes discoloration, fading, and loss of gloss. For appearance-sensitive products like phone cases and stationery, this greatly reduces attractiveness and market value. Hydrolysis-resistant PU preserves color and texture, improving brand image and competitiveness.

l Stable production & consistent quality

Stable hydrolysis-resistant PU is easier to process. Poor hydrolysis resistance can lead to unstable performance when exposed to moisture during production, affecting quality consistency. Guangzhou Elyn Leather Co., Ltd. relies on hydrolysis-resistant PU to ensure reliable, stable products that meet strict customer standards.

l Lower after-sales costs

Products using hydrolysis-resistant PU greatly reduce repairs, returns, and complaints caused by hydrolysis. This lowers after-sales expenses, improves customer satisfaction, strengthens brand trust, and supports long-term business development.

4. Application Case

Guangzhou Elyn Leather Co., Ltd. once supplied PU synthetic leather to a major luggage brand.

The brand targets frequent travelers, whose products face complex and humid conditions.

Previously, their luggage using ordinary PU often cracked and faded in wet environments, leading to many customer complaints and returns.

After understanding the issue, Elyn Leather recommended its high hydrolysis-resistant PU synthetic leather.

With the new material, the luggage no longer suffered hydrolysis-related quality problems. Product lifespan was significantly extended, and customer satisfaction greatly improved.

The luggage brand established long-term stable cooperation with Guangzhou Elyn Leather Co., Ltd., and both sides achieved strong market performance.

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