Wash-free dinnerware with surface-mounted insulating layer

Abstract

The present invention provides a wash-free dinnerware, which is characterized in that, the surface of the wash-free dinnerware is provided with an insulating layer made of food-grade, high-temperature thermoplastic or thermosetting plastic materials; the insulating layer is formed onto the surface of wash-free dinnerware by means of thermal shrinkage, or immersion or blowing. So, the insulating layer could prevent direct contact of wash-free dinnerware with food.

1 . A wash-free dinnerware with a surface-mounted insulating layer, wherein the insulating layer could prevent direct contact of wash-free dinnerware with food. 
   
   
       2 . The structure defined in  claim 1 , wherein said insulating layer is a film structure. 
   
   
       3 . The structure defined in  claim 1 , wherein said insulating layer is made of thermoplastic or thermosetting plastic materials. 
   
   
       4 . The structure defined in  claim 3 , wherein said thermoplastic or thermosetting plastic materials are selected from food-grade, high-temperature plastics. 
   
   
       5 . The structure defined in  claim 1 , wherein said insulating layer is selected from food-grade, high-temperature thermoplastic material, and formed onto the surface of wash-free dinnerware by means of thermal shrinkage. 
   
   
       6 . The structure defined in  claim 5 , wherein the thermal shrinkage comprises the following steps:
 a. Preform the thermoplastic material into a crude embryo with the same shape of wash-free dinnerware;   b. Sleeve the crude embryo onto the surface of the wash-free dinnerware;   c. Heat up the wash-free dinnerware for thermal shrinkage, until the crude embryo is fully mated with the wash-free dinnerware.   
   
   
       7 . The structure defined in  claim 1 , wherein said insulating layer is selected from food-grade, high-temperature thermoplastic material, and formed onto the surface of wash-free dinnerware by means of immersion. 
   
   
       8 . The structure defined in  claim 7 , wherein the immersion method comprises the following steps:
 a. Select liquid thermoplastic or thermosetting plastic materials, and place into a plastic trough;   b. Immerse the wash-free dinnerware into the plastic trough and then take out;   c. Place the wash-free dinnerware attached with liquid thermoplastic or thermosetting plastic materials into a rotary baking equipment, and conduct surface homogenization and curing process.   
   
   
       9 . The structure defined in  claim 1 , wherein said insulating layer is selected from food-grade, high-temperature thermoplastic or thermosetting plastic material, and formed onto the surface of wash-free dinnerware by means of blowing. 
   
   
       10 . The structure defined in  claim 9 , wherein the blowing method comprises the following steps:
 a. Select male and female moulds wherein preformed grooves are arranged symmetrically; after closing the male and female moulds, the symmetrical grooves form a hollow chamber, and an interface linking the hollow chamber to external environment is shaped at one end; the shape of hollow chamber conforms to that of wash-free dinnerware;   b. Connect a nozzle with the interface; liquid thermoplastic or thermosetting plastic materials exist in the nozzle; high-pressure air is charged at the other end of the nozzle, so that the liquid thermoplastic or thermosetting plastic materials are filled into the hollow chamber shaped from the male and female moulds;   c. Open and strip the mould after curing of liquid thermoplastic or thermosetting plastic materials in the hollow chamber of male and female moulds.