Patent Publication Number: US-2021180227-A1

Title: Web fabric

Description:
BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present invention is a CIP of application Serial No. 16/504630, filed Jul. 8, 2019, the entire contents of which are hereby incorporated by reference. 
     Description of the Prior Art 
     A conventional woven textile is woven by threads in longitudinal direction and horizontal direction. The woven textile has to be woven close to prevent from deformation. However, the woven textile is disadvantageous in bad permeability because the gap between threads is small. 
     In addition, the close woven textile has a bad resilience and extension. When the textile is used in objects which needs better extension, such as shoe body, the object becomes too tight and without comfort. 
     Besides, conventional filament is made of material having a bad tolerance of extension and wearing. On the contrary, the filament has a high tolerance of deformation in radial direction so that the filament is compressed when knotting to make the knot smaller. Thus, the woven textile has a flat appearance and lacks of three-dimensional appearance. 
     Another type of woven textile doesn&#39;t knot but fixes the threads by melting the plastic material coated on the threads at the overlap portions of the threads. However, the fixation is weak and easy to strip. Besides, the filament has a low tolerance of extension. 
     U.S. Pat. No. 6,408,732 discloses that the thread and thread are of the same diameter, and each of the threads and is woven by a plurality of filaments and extends bendingly through the knots. The thread or the thread does not radially contracts one another. 
     U.S. Pat. No. 3,686,381 discloses that first threads are turned at 90 degrees and interlinked with second threads, and the first threads and the second threads do not form any knots, which is easy to slip and unstable. 
     U.S. Pat. No. 4,047,316 discloses that the weft is tightened to the warp, the weft is fastened to the warp after being twisted once substantially in the form of a small letter, and both weft and warp are tightened together. That is, U.S. Pat. No. 4,047,316 teaches that the weft cannot be distanced from the warp at the turn of the weft. Moreover, the weft and the warp are of the same diameter so that the tightening of the warp to the weft is uneasy and will twist the weft. 
     SUMMARY OF THE INVENTION 
     The main object of the present invention is to provide a web fabric having high tolerance of extension. In addition, the web fabric has sufficient structure strength and fixation without step of melting. 
     To achieve the above and other objects, the web fabric of the present invention includes a plurality of first threads and a plurality of second threads. Each of the first threads is made of at least one TPU (Thermoplastic polyurethane) filament. The first threads are arranged at intervals. The second threads are arranged at intervals and ties around respective one of the first threads so that the web fabric is formed with a plurality of through holes. Each of the second threads is knotted with the first threads to form a plurality of first knots. Each of the second threads is knotted itself between any two adjacent ones of the first threads to form at least one second knot. The first threads are separated apart by the at least one second knot to prevent the first threads from touching each other. Each of the second threads has an outer diameter smaller than one fifth an outer diameter of each of the first threads. The first threads are integrally connected to be a thread extending back and forth, and each said first thread extends straightly through a plurality of said first knots. 
     The present invention will become more obvious from the following description when taken in connection with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment(s) in accordance with the present invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a front view of the present invention; 
         FIG. 1A  is a partial enlargement of  FIG. 1 ; 
         FIG. 2  is a stereogram of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Please refer to  FIG. 1  to  FIG. 2 , the web fabric of the present invention includes a plurality of first threads  10  and a plurality of second threads  20 . Each said first thread  10  may be made of a single TPU (Thermoplastic polyurethane) filament which is integrally formed, or each said first thread  10  may be made up of a plurality of TPU filaments. The first threads  10  are arranged at intervals. The second threads  20  are arranged at intervals and ties around respective one of the first threads  10  for fixation so that the web fabric is formed with a plurality of through holes  30 . Each of the second threads  20  is knotted with the first threads  10  to form a plurality of first knots  21 . (The first thread and the second thread are not processed by heat for melting.) Each of the second threads  20  is knotted itself between any two adjacent ones of the first threads  10  to form at least one second knot  22 . The first threads  10  are separated apart by the at least one second knot  22  to prevent the first threads  10  from touching each other. The first threads  10  are integrally connected to be a thread extending back and forth, and each said first thread  10  extends straightly through a plurality of said first knots  21 . 
     In the present embodiment, each of the second threads  20  is made of artificial sinew, TPU filament, or other conventional filament for weaving. Preferably, each of the first threads  10  is a part of a monofilament thread made up of a single filament extending back and forth to be plural rows of first thread  10 . 
     Besides, each of the second threads  20  has an outer diameter smaller than one fifth an outer diameter of each of the first threads  10 . Each of the first threads  10  is compressed by the second threads  20  at the first knots  21  to have an outer diameter which is 0.9-1.0 time an original outer diameter of each of the first threads  10 , as shown in  FIG. 1A . On the other hand, a distance between any two adjacent ones of the first threads  10  is 1-5 times an outer diameter of each of the first threads  10 , and a distance between any two adjacent ones of the second threads  20  is 2-5 times an outer diameter of each of the first threads  10 . 
     The first threads and the second threads are fixed to each other by knotting instead of meting. Thus, the threads are fixed firmly, and the web fabric has a three-dimensional appearance. In addition, the first thread is made of TPU to be difficult to be compressed radially when knotting to provide a more three-dimensional appearance. The TPU first thread further has a higher friction to prevent from slipping. Besides, the TPU first thread has a better tolerance of extension, so the web fabric can be used in wide fields and is more durable. In addition, the TPU filament is better in wear resistance.