The difference between silk and silk

This was found in the dictionary,

Silk? n]

Made of silk, soft.

example sentence

Her long silky hair attracted the photographer's attention.

Her long smooth hair attracted the photographer's attention.

Before going to bed, she put on her silk pajamas.

Before going to bed, she put on her silk pajamas.

Silky ['silky] a.

Silky (gentle)

example sentence

The silky fur of this mammal.

The silky hair of this mammal.

A filamentary fiber extracted from the fruit of the silk cotton tree is used for insulation and as a filler for pillows, mattresses and life-saving equipment.

A filamentary fiber extracted from the fruit of the kapok tree is used as a sound insulation material and also as a cushion for pillows, mattresses and life-saving appliances.

It can be inferred from this that ……sillken describes people and silky describes things.