Paper-based composite bottle

Abstract

A paper bottle includes a cap, a mouth, a body and a bottom. The mouth has a tube and a body top. The cap can be to seal the tube. The tube is made of biodegradable plastic. A top end of the body is closely connected with the body top. The body is consisted of two layers of paper-based composite paper. The two layers of paper-based composite paper are spirally wound to form a tubular structure. The bottom is made of wood-pulp paper and closely connected with a bottom end of the body.

What is claimed is: 
     
         1 . A paper-based composite bottle comprising:
 a cap, being of a tubular shape with a closed end and an open end, and having a thread on an inner wall thereof;   a mouth, comprising a tube and a body top, wherein the body top has a first opening and a second opening, the first opening is less than the second opening in diameter, the tube is closely connected to the first opening, an end of the tube is formed with an annular flange, an outer surface of the tube except the flange is formed with a thread screwing with the cap, and a periphery of the first opening is provided with a connecting ring for connecting with the flange;   a body, consisted of at least two layers of paper-based composite paper, the at least two layers of paper-based composite paper comprising a first layer of paper and a second layer of paper, the at least two layers of paper-based composite paper being spirally wound and overlapping with each other to form a tubular structure, an inner side of the body being provided with a water-resistant film, a top end of the body being closely connected with the second opening, the first layer of paper and the second layer of paper forming an outermost layer and an inner layer of the body respectively; and   a bottom, made of wood-pulp paper, closely connected with a bottom end of the body to seal the body.   
     
     
         2 . The paper-based composite bottle of  claim 1 , wherein the body top is made of biodegradable plastic, native wood-pulp paper, recycled wood-pulp paper, bamboo fiber paper or straw-pulp paper. 
     
     
         3 . The paper-based composite bottle of  claim 2 , wherein the biodegradable plastic is polylactide (PLA). 
     
     
         4 . The paper-based composite bottle of  claim 1 , wherein the water-resistant film is polylactide (PLA). 
     
     
         5 . The paper-based composite bottle of  claim 1 , wherein the flange is located at a bottom end of the tube, and the flange is closely connected with the connecting ring. 
     
     
         6 . The paper-based composite bottle of  claim 1 , wherein the mouth further comprises a sealing ring and a fastener, the flange is located at a middle position of the tube, an outer surface of a lower portion of the tube is provided with a thread, the fastener is an annular body whose inner wall is threaded, the lower portion of the tube passes through the sealing ring and the first opening of the body top and is screwed with the fastener. 
     
     
         7 . The paper-based composite bottle of  claim 1 , wherein the first layer of paper and the second layer of paper are made of native wood-pulp paper, recycled wood-pulp paper, bamboo fiber paper or straw-pulp paper. 
     
     
         8 . The paper-based composite bottle of  claim 1 , wherein the body further comprises a layer of aluminum foil attached on the water-resistant film. 
     
     
         9 . The paper-based composite bottle of  claim 1 , wherein the bottom comprises a bottom plate and a side wall around the bottom plate, and the side wall is closely connected with an inner side of the body. 
     
     
         10 . The paper-based composite bottle of  claim 9 , wherein the side wall is closely connected with the inner side of the body by adhesive or high frequency welding. 
     
     
         11 . The paper-based composite bottle of  claim 1 , wherein the cap and the tube are made of biodegradable plastic. 
     
     
         12 . The paper-based composite bottle of  claim 1 , wherein the body top is an independent piece.