Why do disposable diapers need to be tested with professional testing instruments?

I. Limitations of subjective assessment

1.1 Uncontrollable factors in manual testing

Traditional manual testing methods have many limitations:

Inconsistent testing conditions: The temperature, volume, and pouring speed of the liquid are difficult to standardize in each test.

Subjective result judgment: Different personnel have different judgment criteria.

Difficult to quantify data: It is impossible to provide precise numerical evaluation indicators.

Low efficiency: It cannot meet the quality control requirements of large-scale production.

1.2 Complexity of actual usage environment

The usage environment of disposable diapers is highly complex:

Differences in urine volume and frequency among infants of different ages

Influences of various activity postures (crawling, rolling, standing)

Variations in wearing time

Differences in environmental temperature and humidity

These complex factors can only be standardized and simulated by professional instruments.

II. Irreplaceability of professional testing instruments

2.1 Provide objective and quantifiable data

Professional instruments can provide precise numerical indicators:

Slippage: Liquid residue measured to 0.1 mL

Re-entrainment: Reverse seepage under pressure conditions

Permeation time: Absorption speed measured in milliseconds

Diffusion length: Distribution of liquid in the core

2.2 Standardized testing conditions

Professional instruments ensure the consistency of testing conditions:

Temperature control: Maintain a constant temperature for the test liquid (usually 32 ± 1°C)

Precise flow rate: Precisely control the liquid addition speed

Standard pressure: Apply pressure according to specified pressure and time

Constant environment: Test in a standard temperature and humidity environment

2.3 Simulate real usage scenarios

Modern testing instruments can simulate various usage conditions:

Multi-angle testing: Simulate different postures such as lying, sitting, and standing

Dynamic testing: Simulate liquid distribution under movement

Multiple permeation: Simulate multiple urination situations

Pressure changes: Simulate different pressure states

III. Core testing items and instrument requirements

3.1 Absorption performance testing

Testing instruments: Slippage tester, permeation performance tester

Testing parameters: Initial absorption time, multiple absorption capacity, liquid diffusion range, absorption rate curve

3.2 Leakage prevention performance testing

Testing instruments: Side leakage tester, three-dimensional leakage prevention testing device

Testing parameters: Sealing performance of leakage prevention edges, three-dimensional protective effect, leakage prevention performance under different postures

3.3 Comfort testing

Testing instruments: Breathability tester, softness tester

Testing parameters: Breathability rate, material softness, friction coefficient, thermal and moisture resistance