Molded Pulp Consistency & Beating Degree Control: Fiber Condition Determines Product Strength

Molded pulp strength and surface quality are largely determined in the pulping stage. When pulp consistency and beating degree are controlled properly, fibers bond tightly and product strength and uniformity stay stable.

Scenario: Three Consequences of Uncontrolled Pulping

Losing control of pulp consistency and beating degree brings three consequences:

Pain Points

• Too-high consistency gives uneven slurry and fluctuating forming thickness; too-low gives slow forming and easy fiber bleed-through;
• Insufficient beating weakens fiber bonds and lowers strength; excessive beating slows drainage and raises energy use;
• Large parameter swings cause batch-to-batch strength inconsistency, making quality control difficult.

Solution: Three Key Points for Parameter Control

Pulp consistency and beating degree control has three key points:

1. Online consistency monitoring. Use a consistency meter to monitor slurry concentration in real time, with automatic pulp replenishment to stay stable.

2. Tiered beating degree control. Set beating targets by product strength needs—heavy cushioning gets high beating, light products get low beating.

3. Standardized pulp formulation. Create a standard pulping process card, fixing fiber ratio, consistency, and beating parameters.

Result: Both Strength and Consistency Stable

With parameters controlled, product strength stays stable and batch consistency improves; the defect rate falls and customers feel more confident.