Straw, a Method of Manufacturing the Straw and a Flexible Container

Abstract

Disclosed herein are a straw and its manufacturing method. The straw contains an inner tube, an outer tube and a barrier layer. The inner tube has a first port, a second port and a hallow part at the inner side of the inner tube. The hallow part connects the first port and the second port. The outer tube disposed outside the inner tube has a first port and a second port. The first port of the outer tube is cut flush with the first port of the inner tube. The barrier layer is sandwiched between the inner tube and the outer tube, and the barrier layer can block the penetration of gas between the inner tube and the outer tube. Furthermore, a flexible container having the above-mentioned straw is also disclosed herein.

What is claimed is: 
     
         1 . A straw, comprising:
 an inner tube having a first port, a second port and a hallow part at the inner side of the inner tube, wherein the hallow part connects the first port and the second port;   an outer tube deposited outside the inner tube, having a first port and a second port, wherein the first port of the outer tube cuts flush with the first port of the inner tube; and   a barrier layer sandwiched between the inner tube and the outer tube, wherein the barrier layer blocks penetration of gas between the inner tube and the outer tube.   
     
     
         2 . The straw of  claim 1 , wherein a length of the inner tube is less than or equal to a length of the outer tube. 
     
     
         3 . The straw of  claim 1 , wherein a length of the barrier layer is equal to a length of the inner tube. 
     
     
         4 . The straw of  claim 1 , further comprising a closed part used for covering side edges of both of the first ports of the inner tube and the outer tube. 
     
     
         5 . The straw of  claim 1 , wherein the closed part is formed as one protruded part of the first port of the outer tube extends to cover the first port of the inner tube, or one protruded part of the first port of the inner tube extends to cover the first port of the outer tube, or by covering a closing material additionally on side edges of the inner tube and the outer tube 
     
     
         6 . The straw of  claim 1 , wherein a sectional shape of the outer tube and inner tube is selected from one of circle, trapezoid, triangle, diamond, ellipse and square. 
     
     
         7 . A method of manufacturing a straw, comprising:
 forming an inner tube having a first port, a second port and a hallow part at the inner side of the inner tube, wherein the hallow part connects the first port and the second port;   providing a barrier layer disposed outside the inner tube; and   forming an outer tube deposited outside the inner tube, having a first port and a second port, wherein the first port of the outer tube cuts flush with the first port of the inner tube,   wherein the barrier layer is sandwiched between the inner tube and the outer tube, for blocking penetration of gas between the inner tube and the outer tube.   
     
     
         8 . The method of  claim 7 , wherein the material of the barrier layer is a metal material, ceramic material, polymer material or composite material. 
     
     
         9 . The method of  claim 8 , wherein the metal material is aluminum. 
     
     
         10 . The method of  claim 8 , wherein the ceramic material is a silicon oxide material. 
     
     
         11 . The method of  claim 10 , wherein the silicon oxide material is silicon dioxide. 
     
     
         12 . The method of  claim 7 , wherein providing of the barrier layer is achieved by pasting a preformed barrier layer or coating a material on the outer side of the inner tube through vacuum evaporating, sputtering, chemical vapor deposition or dip coating to form the barrier layer. 
     
     
         13 . The method of  claim 7 , wherein the material of the inner tube and the outer tube is polyethylene (PE), nylon (NY) or polyethylene terephthalate (PET). 
     
     
         14 . The method of  claim 7 , wherein the inner tube and the outer tube are formed through injection molding. 
     
     
         15 . A flexible container, comprising:
 an accommodation part formed from a soft material, used for accommodating liquids, wherein the accommodation part has an opening;   a straw, inserted in the opening to connect with the accommodation part, wherein the straw comprises:   an inner tube having a first port, a second port and a hallow part at the inner side of the inner tube, wherein the hallow part connects the first port and the second port;   an outer tube deposited outside the inner tube, having a first port and a second port, wherein the first port of the outer tube cuts flush with the first port of the inner tube; and   a barrier layer sandwiched between the inner tube and the outer tube, wherein the barrier layer blocks penetration of gas between the inner tube and the outer tube, wherein a position of connection between the accommodation part and the straw is not lower than a position of the second port of the inner tube; and   a straw cover used for closing the first port of the inner tube of the straw.   
     
     
         16 . The flexible container of  claim 15 , further comprising hydrogen-containing water accommodated in the flexible container, wherein the barrier layer of the straw blocks run-out of hydrogen gas in the hydrogen-containing water from the inner side to the outer side of the straw. 
     
     
         17 . The flexible container of  claim 16 , wherein a length of the inner tube is less than or equal to a length of the outer tube, and a length of the barrier layer is equal to a length of the inner tube. 
     
     
         18 . The flexible container of  claim 17 , further comprising a closed part used for covering side edges of both of the first ports of the inner tube and the outer tube. 
     
     
         19 . The flexible container of  claim 18 , wherein the closed part is formed as one protruded part of the first port of the outer tube extends to cover the first port of the inner tube, or one protruded part of the first port of the inner tube extends to cover the first port of the outer tube, or by covering a closing material additionally on side edges of the inner tube and the outer tube 
     
     
         20 . The flexible container of  claim 19 , wherein a sectional shape of the outer tube and inner tube is selected from one of circle, trapezoid, triangle, diamond, ellipse and square.