Improvement Plan for Tablet Yield Rate of Tablet Press

In tablet production, the vast majority of problems such as fragmentation, delamination, low hardness, powder loss, and unstable mass production are not caused by equipment debugging issues, but by material properties.

The industry recognizes that the most difficult raw material for tablet pressing has three major characteristics: high elasticity and rebound, high coarse fiber, and inherent internal oil and fat.

Organize a minimalist and directly implementable mass production plan for such high-risk materials.

01 Four fatal pain points of high-risk materials

Conventional auxiliary materials can be molded under pressure, while high-risk materials have natural molding defects:

1. Strong elastic rebound: With a high protein and polysaccharide structure, it recovers quickly under pressure, and the greater the pressure, the more likely it is to cause top and waist fractures.

2. Non plasticity and fiber hardness: Algae walls and wood fibers cannot deform and bite, resulting in loose tablet structure and poor strength.

3. Comes with endogenous oil: The oil wraps around the powder, blocking the penetration of adhesive, causing particles to slip and easily delaminate.

4. Light powder, high gas content: high compression ratio, poor exhaust, residual air expansion leading to fragmentation.

02 List of high-risk materials for four major categories of difficult to press tablets

Microalgae (the most difficult to form)

Representative: Chlorella vulgaris, Spirulina, Naked algae, DHA algae powder, kelp ultrafine powder

Problem: Fluffy and lightweight, with strong rebound, pure powder cannot be formed by direct pressing.

High oil seed category (heavily affected by layered film)

Representative: Ganoderma spore powder, flaxseed, chia seeds, hemp seeds, black sesame seeds, grape seeds

Problem: High grease isolation bonding, prone to falling off and incomplete molding.

Wheat bran, germ, and miscellaneous grains

Representative: Wheat germ, corn germ, oat bran, rice bran, quinoa flour Problem: Porous and non plastic, only temporarily bonded, loose upon unloading.

Representatives of high elasticity lightweight powder: soybean/pea protein, gluten powder, pine pollen, mushroom powder, frozen dried fruit and vegetable powder. Problems: strong rebound, high gas content, extremely unstable high-speed compression.

03 Common faults | Targeted quick repair plan

✅ Top cracking and bursting: large rebound, poor exhaust → opening pre pressure, reducing main pressure, screening out ultrafine powder, supplementing MCC

✅ Waist cracking and delamination: grease isolation, demolding pulling → strict control of lubricants, compound strong adhesives, slow ejection

✅ Low hardness, fragile: poor particle strength, moisture imbalance → Wet granulation, moisture control 4.5-6%

✅ Unstable high-speed mass production: insufficient pressure holding, high gas content → reduced speed, abandoning dry powder direct pressure

04 Universal Mass Production Standard Scheme (Full Category Adaptation)

Core formula logic MCC 15-25%: Building a plastic skeleton to counteract elastic rebound

Lactose monohydrate 5-15%: increases bulk density and reduces compression ratio

HPMC+PVP-K30: Penetrating oil film and enhancing particle adhesion

Magnesium stearate 0.2-0.3%: limited addition to prevent slipping and delamination

Standard process parameters

Prioritize wet granulation and prohibit direct pressing of pure powder

Drying temperature ≤ 50 ℃, to avoid oil precipitation and powder brittleness

Particle moisture content in the golden range of 4.5-6%

Pre pressure fully open (pre pressure=1/3 of main pressure), completely exhaust

Low speed compression and slow demolding to reduce stress damage

Exclusive techniques for high content products

When the proportion of raw materials is high and auxiliary materials are limited, adding trace amounts of glycerol/sorbitol to granulation glue can soften fibrin, reduce rebound, effectively improve tablet hardness and yield, without affecting product claims.