Hat capable of recovering original shape and method of manufacturing the same

Abstract

A hat capable of recovering the original shape and a method of manufacturing the same are provided. The hat is characterized by preparing mixtures comprising waterborne polyurethane, water, and crosslinking agent; coating synthetic fiber yarns of the hat with the mixture; curing the mixtures in a certain temperature condition in order to form a thin polyurethane film on the surface of fabric or knitted fabric for the hat. The curing reaction products by the waterborne polyurethane component implement a shape recovery of the hat after the deformation or damage due to the external force in the initial shape of the hat.

What is claimed is: 
     
         1 . A hat capable of shape recovery after the deformation or damage due to external force by coating the surface of synthetic fiber yarns of the hat with mixtures comprising 100 parts by weight of the typical waterborne polyurethane, 0 to 400 parts by weight of water, 0.1 to 1.5 parts by weight of a crosslinking agent, and 0.1 to 3 parts by weight of clay powder (NaMMT); by curing the mixtures in a temperature range of 50° C. to 120° C. for crosslinking reactions via the cure of the waterborne polyurethane component; and by forming a thin polyurethane film on the surface of fabric or knitted fabric of the hat. 
     
     
         2 . The hat as claimed in  claim 1 , wherein the crosslinking reactions proceed between the waterborne polyurethane component and an amide group, an ester group, an acrylic group, or a nitrile group of the synthetic fiber yarns constituting the hat. 
     
     
         3 . The hat as claimed in  claim 1 , wherein the polyurethane film gives its own shape recovery power to the fabric or knitted fabric of the hat. 
     
     
         4 . A method for manufacturing cap-type or knitted hat for the user's head, capable of shape recovery after the deformation or damage due to external force, comprising the steps of:
 1) preparing mixtures comprising 100 parts by weight of the typical waterborne polyurethane, 0 to 400 parts by weight of water, and 0.1 to 1.5 parts by weight of a crosslinking agent for the waterborne polyurethane component;   2) coating the surface of fabric or knitted fabric for the hat with the mixtures;   3) curing the mixtures for crosslinking reactions in a temperature range of 50° C. to 120° C.; and   4) forming a thin polyurethane film on the surface of the fabric or knitted fabric for the hat for giving its own shape recovery power to the hat.   
     
     
         5 . The method for manufacturing the hat claimed as in  claim 4 , wherein the mixtures further comprise 0.1 to 3 parts by weight of clay powder (NaMMT) for the waterborne polyurethane component.