Why does 30D Polyester Fusible Interlining have shape memory characteristics？

The reason why 30D Polyester Fusible Interlining has shape memory properties is closely related to the molecular structure and physical properties of the material itself. The following is a detailed explanation of 30D Polyester Fusible Interlining with shape memory characteristics:

molecular structure and polyester characteristics：Polyester is a type of polyester fiber whose molecular structure contains a large number of ester groups. This ester group forms a long-chain structure during the polymerization process, making polyester have a relatively regular molecular arrangement. This regular molecular arrangement helps to form a stable The fiber structure provides the basis for shape memory.

Elasticity of high molecular chain:The molecular chain of polyester is very long, which gives it high elasticity. Under the action of external force, the molecular chain of polyester can be bent or stretched, but once the external force disappears, the molecular chain will quickly return to its original state. Elasticity is a key factor in shape memory characteristics.

Melting point and glass transition temperature：The melting point of polyester is higher, usually around 250°C, and the glass transition temperature is around 50°C. This means that under normal use conditions, polyester fiber is in a solid state. And the low glass transition temperature makes it able to show the ability to change shape at a relatively low temperature.

Hot plate technology：In the manufacturing process of 30D Polyester Fusible Interlining, a heat setting process is usually used. This process can expose the fabric to high temperature and then rapidly cool it, making the molecular chain rearrange into a new shape, thereby fixing the shape of the fabric 。 This type of hot-form technology provides a powerful activation mechanism for the shape memory characteristics of 30D polyester.

Fine fiber diameter：The "D" in "30D" indicates the unit of fiber is “branch” (Denier), the meaning of 30D is the diameter of each branch of fiber is 30分1mm. This relatively small fiber diameter makes 30D polyester viscose The surface is even more light, reducing the friction between the fibers, thereby helping to maintain its shape.

Generally speaking, the reason why 30D Polyester Fusible Interlining has shape memory characteristics is the regularity of its molecular structure, high molecular chain elasticity, melting point and glass transition temperature characteristics, the application of thermosetting technology, and the diameter of fine fibers, etc. These characteristics together make the 30D polyester viscose lining able to quickly return to its original shape during wear and use, providing a more stable and shape-memory clothing experience.