Fabric bag, method for manufacturing the fabric bag using yarns and method for disassembling the fabric bag into yarns

Abstract

The application discloses a fabric bag, a method for manufacturing the fabric bag by using yarn and a method for disassembling the fabric bag into yarn. The fabric bag comprises a first side, a second side and a bottom formed by bending a fabric sheet with a woven structure along the warp direction, and a first connecting part and a second connecting part formed by interlacing loops formed by continuous weft yarns on the weft selvage of the fabric sheet. The disassembling process of the fabric bag of the application hardly causes damage to the fiber, and can realize fine, flexible disassembly and recycling of the fabric bag.

Description

TECHNICAL FIELD

[0001] The present invention relates to a fabric bag, a method of making the fabric bag using yarns and a method of disassembling the fabric bag into yarns. BACKGROUND

[0002] Plastic bags are commonly used in daily life, and are widely used for containing, packaging and accommodating other commonly used life items. Plastic bags are mostly made of polyethylene, polyvinyl chloride, polypropylene, polyester and other plastic film materials, and have the advantages of low price, light weight, durability, waterproofness and are widely used in the world. Plastic bags have brought convenience to people's life, but have also caused long-term harm to the nature and human health. Bisphenol A contained in plastic bags can cause endocrine disorders, causing metabolic disorders and infertility, and long-term contact with plastic bags or food packaged by plastic bags will increase the risk of cancer. The chemicals used to make plastic bags are usually extracted from petroleum, so the production of plastic bags will consume a large amount of non-renewable resources, and it is difficult to degrade naturally once produced. A large number of waste plastic bags are treated by traditional landfill or incineration methods. Landfilling plastic bags with garbage will not only occupy a large amount of land, but also will not degrade in 200 years buried underground, which will seriously damage the permeability of soil, cause soil compaction, affect the growth of plants and animals and cause pollution of groundwater resources, and also form "microplastics" in the human and animal body. Incineration of plastic bags will consume air and fuel, and if the incineration temperature is not properly controlled, it will release dioxins, which not only have teratogenic, carcinogenic and mutagenic toxicity, but also affect the survival and reproduction of offspring. In order to control the "white pollution" caused by plastic bags, on the one hand, governments use economic or administrative restrictions to limit the use of plastic bags by the public, and at the same time carry out environmental protection propaganda and guidance. Many countries have chosen the economic means of charging for the use of plastic shopping bags, increased the direct cost of using plastic bags to guide consumer behavior, and shaped the environmental awareness of citizens in order to achieve the goal of reducing plastic.However, due to various factors (such as producers and merchants driven by profits, consumers believe that the demand for the use of plastic bags is much greater than the cost of use, the public environmental awareness is weak, market supervision is difficult, etc.), the above plastic restriction measures are difficult to implement; on the other hand, many enterprises and research institutions have developed a variety of degradable plastic bags as substitutes for traditional plastic bags, which can be degraded in the natural environment (specific microorganisms, temperature, humidity) after use, and the substances generated or remaining during the degradation process are harmless to the environment and will not affect the survival of humans and other organisms, but they have problems such as higher production or existence costs than similar traditional plastic bags, harsh degradation conditions, poor processing performance, or poor service life and mechanical properties, which are still difficult to promote and apply on a large scale in a period of time; in addition, there is also a path to recycle plastic bags and then reuse them, the commonly used methods are mainly: (1) melt regeneration, that is, waste plastic bags are heated and plasticized again, but only some plastic products with poor performance can be manufactured; (2) thermal cracking, that is, waste plastic bags are cracked into fuel oil and fuel gas through thermal cracking, this method cannot recycle plastic bags, and will produce a large amount of harmful waste; (3) recycling chemical raw materials, that is, the macromolecular chains of waste plastic bags are chemically decomposed into monomers or small molecules with different polymerization degrees, this method decomposes the chemical raw materials generated in quality with new raw materials, which can be rebuilt into plastic polymers, and can realize the recycling and reuse of plastic bags, but this method needs to be classified according to the type of polymer and additive, the process cost is high, and the energy consumption of re-polymerization is large, resulting in more greenhouse gas emissions.

[0003] In view of the harm of plastic bags and the recycling problem thereof, a better method is to seek alternatives to plastic bags (including degradable plastic bags). Fabrics (including woven fabrics, knitted fabrics, braided fabrics, non-woven fabrics, etc.) also have the advantages of being light, soft, durable, and having mature manufacturing methods, and the types of raw materials that can be used are diverse, so it is easy to process into bags as alternatives to plastic bags. However, compared with plastic bags, the main problem of bags made of fabrics (hereinafter referred to as fabric bags) is that the cost is higher, which is not conducive to achieving disposable use, and for fabric bags made of chemical fibers, they also pollute the environment after being discarded because they are difficult to naturally degrade, and fabric bags made of degradable fibers also have the disadvantages of high cost, immature technology, poor mechanical properties, etc. Therefore, recycling and recycling of waste and old fabric bags play an important role in reducing their pollution to the environment and reducing their use cost to replace plastic bags. The current recycling methods of waste textiles mainly include chemical recycling method and physical recycling method. The chemical recycling method is to recycle at the molecular level by depolymerizing high polymers in waste textiles to obtain oligomers or monomers, and then performing a regeneration process, but the chemical recycling method has high requirements on the process, especially the separation and recycling process of each component fiber in the blended fabric, which has the problems of high recycling difficulty and cost, and the technology still needs to be broken through. The physical recycling method is to directly open the waste textiles into regenerated fibers through mechanical treatment such as cutting, tearing, opening, carding, etc., which is a relatively mature technology, but this process will cause serious damage to the fibers, reduce the length of the recycled fibers, and make the recycled fibers only be used for the processing of low-grade textiles, and it is difficult to realize the multiple recycling of waste textiles. In order to improve the length of the fibers obtained by the physical recycling method, the key and research direction of this technology is to design the structure of the textile to be easily disassembled and to finely and flexibly disassemble the textile.

[0004] Therefore, the technical field needs to solve the problem of how to design a fabric bag structure that is easy to disassemble and finely and flexibly disassemble the fabric bag when recycling the fabric bag by using the physical recycling method. SUMMARY

[0005] The technical problem to be solved by the present application is that the fabric bag structure is not easy to disassemble, which leads to the problem that only short-length regenerated fibers can be obtained by simple, direct and violent cutting, tearing, opening and other actions when the fabric bag is mechanically treated and recycled by using the physical recycling method, and the fabric bag cannot be finely and flexibly disassembled.

[0006] To solve the above technical problems, the technical scheme of the present application is to provide a fabric bag, which comprises a first side, a second side, a bottom, and a first connecting part and a second connecting part arranged between the first side and the second side, the first side, the second side and the bottom are formed by bending a same piece of fabric sheet with a woven structure along the warp direction, the fabric sheet has loops formed by continuous weft yarns on a first selvedge and a second selvedge in the weft direction, the number of loops on the first selvedge corresponding to the first side and the second side of the fabric bag is equal and the positions of the loops are one-to-one corresponding, the number of loops on the second selvedge corresponding to the first side and the second side of the fabric bag is equal and the positions of the loops are one-to-one corresponding, the first connecting part is formed by firstly respectively intertwining two loops corresponding to the first side and the second side on the first selvedge, then intertwining the loops in the lower row on the same side on the upper row, and finally locking the two loops in the uppermost row, the second connecting part is formed by firstly respectively intertwining two loops corresponding to the first side and the second side on the second selvedge, then intertwining the loops in the lower row on the same side on the upper row, and finally locking the two loops in the uppermost row, the position of the weft yarn closest to the warp selvedge of the first side is defined by at least two warp yarns closest to the first selvedge in the weft direction and two warp yarns closest to the second selvedge in the weft direction, and the position of the weft yarn closest to the warp selvedge of the second side is defined by at least two warp yarns closest to the first selvedge in the weft direction and two warp yarns closest to the second selvedge in the weft direction.

[0007] Preferably, the locking method is to pass a yarn, thread, string, narrow fabric or similar soft and slender body through the two loops in the uppermost row of the first connecting part and then knot, and pass a yarn, thread, string, narrow fabric or similar soft and slender body through the two loops in the uppermost row of the second connecting part and then knot.

[0008] Preferably, the locking method is to simultaneously connect one end of a handle of the fabric bag with the two loops in the uppermost row of the first connecting part and simultaneously connect the other end of the handle with the two loops in the uppermost row of the second connecting part.

[0009] Preferably, the locking method is to connect one end of a first handle of the fabric bag with any one of the two loops in the uppermost row of the first connecting part, connect the other end of the first handle with any one of the two loops in the uppermost row of the second connecting part, connect one end of a second handle with the loop in the uppermost row of the first connecting part which is not connected with the first handle, and connect the other end of the second handle with the loop in the uppermost row of the second connecting part which is not connected with the first handle.

[0010] Preferably, the fabric sheet is a double-weft fabric with weft insertion on one side.

[0011] Preferably, the fabric piece is a single-weft fabric with double-weft insertion.

[0012] Preferably, the defined method is that two adjacent warp yarns are formed by bending a same yarn.

[0013] Preferably, the defined method is that the ends of two warp yarns are knotted.

[0014] The present application also provides a method for manufacturing the above-mentioned fabric bag using yarns, comprising the following steps:

[0015] Step 1: weaving a fabric piece with a woven structure on a loom in a manner of single-weft insertion and double-weft insertion in one time, so that the fabric piece has loops formed by continuous weft yarns extending from the fabric piece on a first selvedge and a second selvedge in the weft direction, the number of loops on the first selvedge is even and the positions of the loops are substantially symmetrical relative to a center line of symmetry of the fabric piece in the weft direction, the number of loops on the second selvedge is even and the positions of the loops are substantially symmetrical relative to the center line of symmetry of the fabric piece in the weft direction, the position of one weft yarn closest to the first selvedge in the warp direction of the fabric piece is defined by two warp yarns closest to the first selvedge in the weft direction and two warp yarns closest to the second selvedge in the weft direction so as not to be pulled out from the first selvedge in the warp direction, and the position of one weft yarn closest to the second selvedge in the warp direction of the fabric piece is defined by two warp yarns closest to the first selvedge in the weft direction and two warp yarns closest to the second selvedge in the weft direction so as not to be pulled out from the second selvedge in the warp direction;

[0016] Step 2: relatively bending the fabric piece along the warp direction to form a first side, a second side and a bottom of the fabric bag;

[0017] Step 3: respectively interlooping two loops on the first selvedge of the fabric piece corresponding to the positions of the first side and the second side, then interlooping the loops in the lower row on the loops in the upper row on the same side in sequence, and then locking the two loops in the uppermost row to form a first connecting part of the fabric bag;

[0018] Step 4: respectively interlooping two loops on the second selvedge of the fabric piece corresponding to the positions of the first side and the second side, then interlooping the loops in the lower row on the loops in the upper row on the same side in sequence, and then locking the two loops in the uppermost row to form a second connecting part of the fabric bag; thus the fabric bag is manufactured.

[0019] The present application also provides a method for manufacturing the above-mentioned fabric bag using yarns, characterized by comprising the following steps:

[0020] Step 1: weaving a fabric piece with a woven structure on a loom in a way of double weft insertion and single weft introduction, so that the fabric piece has loops formed by continuous weft yarns extending from the fabric piece on a first selvedge and a second selvedge in the weft direction, the number of loops on the first selvedge is even and the positions of the loops are approximately symmetrical relative to the center line of symmetry of the fabric piece in the weft direction, and the number of loops on the second selvedge is even and the positions of the loops are approximately symmetrical relative to the center line of symmetry of the fabric piece in the weft direction; the position of a weft yarn closest to the first selvedge in the warp direction is defined by at least two warp yarns closest to the first selvedge in the weft direction and two warp yarns closest to the second selvedge in the weft direction so that the weft yarn cannot be pulled out from the first selvedge in the warp direction, and the position of a weft yarn closest to the second selvedge in the warp direction is defined by at least two warp yarns closest to the first selvedge in the weft direction and two warp yarns closest to the second selvedge in the weft direction so that the weft yarn cannot be pulled out from the second selvedge in the warp direction;

[0021] Step 2: folding the fabric piece in the warp direction to form a first side, a second side and a bottom of the fabric bag;

[0022] Step 3: respectively interlooping two loops on the first selvedge of the fabric piece corresponding to the positions of the first side and the second side, then interlooping the lower row of loops on the same side on the upper row of loops from bottom to top, and then locking the two loops in the uppermost row to form a first connecting part of the fabric bag;

[0023] Step 4: respectively interlooping two loops on the second selvedge of the fabric piece corresponding to the positions of the first side and the second side, then interlooping the lower row of loops on the same side on the upper row of loops from bottom to top, and then locking the two loops in the uppermost row to form a second connecting part of the fabric bag; thus the fabric bag is completed.

[0024] The application also provides a method for disassembling the above-mentioned fabric bag into yarns, characterized by comprising the following steps:

[0025] Step 1: unlocking the locking of the two loops in the uppermost row of the first connecting part;

[0026] Step 2: unlocking the locking of the two loops in the uppermost row of the second connecting part;

[0027] Step 3: taking off the lower row of loops on the same side on the upper row of loops of the first connecting part from top to bottom;

[0028] Step 4: taking off the lower row of loops on the same side on the upper row of loops of the second connecting part from top to bottom;

[0029] Step 5: respectively disentangling the two loops of the first connecting part corresponding to the positions of the first side and the second side;

[0030] Step 6: the second connecting part is respectively disengaged from the two loops corresponding to the first side and the second side positions;

[0031] Step 7: the first side, the second side and the bottom are unfolded to form a flat fabric piece;

[0032] Step 8: the continuous weft yarn is continuously drawn out from the selvedge side where it enters the fabric shed, and finally a continuous weft yarn and a continuous warp yarn are obtained; thus the process of disassembling the fabric bag into yarns is completed.

[0033] The application also provides a method for disassembling the above-mentioned fabric bag into yarns, characterized in that the method comprises the following steps:

[0034] Step 1: the locking of the two loops in the uppermost row of the first connecting part is released;

[0035] Step 2: the locking of the two loops in the uppermost row of the second connecting part is released;

[0036] Step 3: the lower row of loops on the same side and above are sequentially taken off from top to bottom by being threaded on the lower row of loops above;

[0037] Step 4: the lower row of loops on the same side and above are sequentially taken off from top to bottom by being threaded on the lower row of loops above;

[0038] Step 5: the first connecting part is respectively disengaged from the two loops corresponding to the first side and the second side positions;

[0039] Step 6: the second connecting part is respectively disengaged from the two loops corresponding to the first side and the second side positions;

[0040] Step 7: the first side, the second side and the bottom are unfolded to form a flat fabric piece;

[0041] Step 8: the knot on the warp yarn for weft yarn position definition is loosened;

[0042] Step 9: the continuous weft yarn is continuously drawn out from the selvedge side where it enters the fabric shed, and finally a continuous weft yarn and at least one warp yarn are obtained; thus the process of disassembling the fabric bag into yarns is completed.

[0043] The application also provides a method for disassembling the above-mentioned fabric bag into yarns, characterized in that the method comprises the following steps:

[0044] Step 1: the locking of the two loops in the uppermost row of the first connecting part is released;

[0045] Step 2: the locking of the two loops in the uppermost row of the second connecting part is released;

[0046] Step 3: sequentially take off the lower row of loops from top to bottom on the same side of the upper row of loops with the first connecting part being nested in the loops;

[0047] Step 4: sequentially take off the lower row of loops from top to bottom on the same side of the upper row of loops with the second connecting part being nested in the loops;

[0048] Step 5: respectively remove the first connecting part from the two loops corresponding to the first side and the second side;

[0049] Step 6: respectively remove the second connecting part from the two loops corresponding to the first side and the second side;

[0050] Step 7: unfold the first side, the second side and the bottom to form a flat fabric piece;

[0051] Step 8: loosen the knots on the warp yarns for defining the weft yarn positions;

[0052] Step 9: continuously pull out the continuous weft yarns from the fabric piece along the selvedge side in the warp direction, and finally obtain a continuous weft yarn and at least one continuous warp yarn; thus, the process of disassembling the fabric bag into yarns is completed.

[0053] Compared with the prior art, the fabric bag has the following beneficial effects:

[0054] The fabric bag is formed by the loops nested with each other formed by the continuous weft yarns extending from the fabric piece on the two selvedges, and does not need to be made by sewing or bonding multiple fabric pieces as in the conventional fabric bag, so that the fabric bag can be easily restored to a fabric piece, and then the continuous weft yarns are continuously pulled out from the fabric piece, the fabric piece is disassembled into a continuous weft yarn and a continuous warp yarn, and then the obtained yarns can be loosened into fibers by using the known yarn untwisting method. Compared with the physical recycling process of the conventional fabric bag which causes serious damage to the fibers and can only obtain fibers with a short length, the disassembly process of the fabric bag of the present application almost does not cause damage to the fibers, and can realize fine and flexible disintegration and recycling of the fabric bag. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 It is a perspective view of the fabric bag in Example 1;

[0056] Figure 2 It is a structural schematic view of the fabric piece in Example 1;

[0057] Figure 3 It is a structural schematic view of the first connecting part in Example 1;

[0058] Figure 4 It is a structural schematic view of the second connecting part in Example 1;

[0059] Figure 5 This is a schematic diagram of the process of continuously pulling the continuous weft yarn from the fabric sheet in Example 1;

[0060] Figure 6 This is a perspective view of the fabric bag in Example 2;

[0061] Figure 7 This is a schematic diagram of the structure of the fabric piece in Example 2;

[0062] Figure 8 This is a schematic diagram of the process of continuously pulling the continuous weft yarn from the fabric sheet in Example 2;

[0063] Figure 9 This is a perspective view of the fabric bag in Example 3;

[0064] Figure 10 This is a schematic diagram of the structure of the fabric sheet in Example 3;

[0065] Figure 11 This is a schematic diagram of the process of continuously pulling the continuous weft yarn from the fabric sheet in Example 3;

[0066] Figure 12 This is a perspective view of the fabric bag in Example 4;

[0067] Figure 13 This is a perspective view of the fabric bag in Example 5. Detailed Implementation

[0068] To make the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0069] Example 1

[0070] Example 1

[0071] Figures 1 to 5 A first embodiment of the present invention is shown. For example... Figure 1 As shown, the fabric bag 34 includes a first side 14, a second side 15, a bottom surface 24, and a first connecting portion 16 and a second connecting portion 17 disposed between the first side 14 and the second side 15. The first side 14, the second side 15, and the bottom surface 24 are formed by bending the same piece of woven fabric 35 along the warp direction. The warp yarns 26 and weft yarns 25 of the fabric 35 are both 5-count jute yarns with an average fiber length of 150 mm. The weft density of the fabric 35 is 2.5 threads / 5 cm, the warp density is 2.5 threads / 5 cm, and the weave structure is plain weave. The length of the fabric 35 in the warp direction is 35 cm, and the distance between the outermost warp yarn A 37 of the first weft selvage 12 and the outermost warp yarn C 39 of the second weft selvage 13 is 16 cm. Figure 2As shown, the fabric piece 35 is a single-weft fabric with double-side weft insertion, and the weft yarn 25 is a continuous yarn and contains 9 warp yarns 26. The fabric piece 35 has one loop 1 33 formed by the continuous weft yarn 25 every two wefts on the first weft edge 12, and has one loop 2 45 formed by the continuous weft yarn 25 every two wefts on the second weft edge 13. The length of the yarn constituting a single loop 1 33 or loop 2 45 is 9 cm. There are 14 loops 1 33 on the first weft edge 12, so there are 7 loops 1 33 on the first side 14 of the fabric pocket 34 and 7 loops 1 33 on the second side 15 of the fabric pocket 34 on the first weft edge 12; there are 14 loops 2 45 on the second weft edge 13, so there are 7 loops 2 45 on the first side 14 of the fabric pocket 34 and 7 loops 2 45 on the second side 15 of the fabric pocket 34 on the second weft edge 13. The positions of the loops 1 33 on the first side 14 and the second side 15 of the fabric pocket 34 on the first weft edge 12 correspond to each other, and the positions of the loops 2 45 on the first side 14 and the second side 15 of the fabric pocket 34 on the second weft edge 13 correspond to each other. The two warp yarns A 37 and B 38 on the outermost side of the first weft edge 12 of the fabric piece 35 are knotted at the two ends on the first warp edge 27 to obtain a knot A 41; the warp yarns A 37 and B 38 on the outermost side of the first weft edge 12 of the fabric piece 35 are knotted at the two ends on the second warp edge 36 to obtain a knot B 42; the two warp yarns C 39 and D 40 on the outermost side of the second weft edge 13 of the fabric piece 35 are knotted at the two ends on the first warp edge 27 to obtain a knot C 43; the warp yarns C 39 and D 40 on the outermost side of the second weft edge 13 of the fabric piece 35 are knotted at the two ends on the second warp edge 36 to obtain a knot D 44.

[0072] The structure of the first connecting portion 16 is shown in Figure 3 The process of forming the first connecting portion 16 is as follows: the loops B01, B02,..., B07 on the first side 14 of the first weft edge 12 of the fabric piece 35 are respectively threaded through the loops A01, A02,..., A07 on the second side 15 corresponding to the loops B01, B02,..., B07, and then the loop B07 is threaded through the loop B06, the loop A07 is threaded through the loop A06, the loop B06 is threaded through the loop B05, the loop A06 is threaded through the loop A05,..., the loop B02 is threaded through the loop B01, and the loop A02 is threaded through the loop A01, and then one end of the handle 30 is connected to the loops B01 and A01 by knotting. In this embodiment, the handle 30 is a yellow hemp yarn with a count of 2.

[0073] The structure of the second connecting part 17 is as follows: Figure 4 As shown, the formation process is as follows: First, loops D01, D02, ..., D07 on the second weft side 13 of the fabric piece 35, located on the first side 14, are threaded onto the corresponding loops C01, C02, ..., C07 located on the second side 15. Then, loop D07 is threaded onto loop D06, loop C07 onto loop C06, loop D06 onto loop D05, loop C06 onto loop C05, ..., loop D02 onto loop D01, and loop C02 onto loop D01. Finally, the other end of the handle 30 is connected to loops D01 and C01 by knotting. This completes the production of the fabric bag 34.

[0074] In this embodiment, the steps for disassembling the fabric bag 34 into yarn are as follows:

[0075] (1) Loosen the knot between the coil B01 and coil A01 of the first connecting part 16 and the handle 30, and remove the handle 30 from the first connecting part 16;

[0076] (2) Loosen the knot between the coil D01 and coil C01 of the second connecting part 17 and the handle 30, and remove the handle 30 from the second connecting part 17;

[0077] (3) Remove coil B02 from coil B01, remove coil A02 from coil A01, remove coil B03 from coil B02, remove coil A03 from coil A02, ..., remove coil B07 from coil B06, remove coil A07 from coil A06;

[0078] (4) Remove coils B01, B02, ..., B07 from coils A01, A02, ..., A07 respectively, thus completing the disassembly of the first connection part 16;

[0079] (5) Remove coil D02 from coil D01, remove coil C02 from coil C01, remove coil D03 from coil D02, remove coil C03 from coil C02, ..., remove coil D07 from coil D06, remove coil C07 from coil C06;

[0080] (6) Remove coils D01, D02, ..., D07 from coils C01, C02, ..., C07 respectively, thus completing the disassembly of the second connection part 17;

[0081] (7) Unfold the first side 14, the second side 15 and the bottom surface 24 to form a flat fabric sheet 35;

[0082] (8) The knot A 41 of the warp yarn A 37 and the warp yarn B 38 at the outermost side of the weft first selvedge 12 of the fabric piece 35 on the warp first selvedge 27 is loosened, the knot B 42 of the warp yarn A 37 and the warp yarn B 38 at the outermost side of the weft first selvedge 12 of the fabric piece 35 on the warp second selvedge 36 is loosened, the knot C 43 of the warp yarn C 39 and the warp yarn D 40 at the outermost side of the weft second selvedge 13 of the fabric piece 35 on the warp first selvedge 27 is loosened, and the knot D 44 of the warp yarn C 39 and the warp yarn D 40 at the outermost side of the weft second selvedge 13 of the fabric piece 35 on the warp second selvedge 36 is loosened.

[0083] (9) As shown in FIG. 9, the continuous weft yarn 25 is continuously drawn out from the fabric piece 35 on the warp first selvedge 27 side in the direction indicated by the arrow, and finally a continuous weft yarn 25 with a length of about 7 meters and 9 warp yarns 26 with a length of 35 centimeters are obtained; thus the process of disassembling the fabric bag 34 into yarns is completed. Figure 5

[0084] Further, the obtained weft yarn 25 and warp yarn 26 can be loosened into jute fibers with an average length of 150 millimeters by using a known yarn untwisting method, so as to realize low-damage and fine recycling of jute fibers.

[0085] Embodiment 2

[0086] Figures 6 to 8 Another embodiment of the present application is shown, and the representation manner is the same as that of embodiment 1, and the same components are also identified by the same reference numerals.

[0087] The difference between embodiment 2 and embodiment 1 is that the weave structure of the fabric piece 35 is a warp-repeating plain weave with a warp-float length of 2, and the fabric piece 35 is a double-weft fabric with single-side weft insertion, that is, the continuous weft yarn 25 enters the shed in a loop shape from the weft first selvedge 12 side.

[0088] Another difference between embodiment 2 and embodiment 1 is that in the step (9) of disassembling the fabric bag 34 into yarns, the continuous weft yarn 25 is continuously drawn out from the weft first selvedge 12 side, and finally a continuous weft yarn 25 with a length of about 7 meters and 9 warp yarns 26 with a length of 35 centimeters are obtained.

[0089] Embodiment 3

[0090] Figures 9 to 11 Another embodiment of the present application is shown, and the representation manner is the same as that of embodiment 2, and the same components are also identified by the same reference numerals.

[0091] ​The difference between Example 3 and Example 2 is that each warp yarn 26 of the fabric panel 35 is formed from a continuous yarn after 8 bends, so that the fabric panel 35 is limited by the loop three 48 formed by the continuous warp yarn 26 at the position of the weft yarn 50 closest to the warp first selvedge 27 from being pulled out of the warp first selvedge 27, and the fabric panel 35 is limited by the loop four 49 formed by the continuous warp yarn at the position of the weft yarn 51 closest to the warp second selvedge 36 from being pulled out of the warp second selvedge 36.

[0092] Another difference between Example 3 and Example 2 is that the fabric bag 34 is finally disassembled into a continuous weft yarn with a length of about 7 meters and a continuous warp yarn with a length of about 3.2 meters.

[0093] Example 4

[0094] Figure 12 Another embodiment of the present application is shown, and the representation is the same as Example 1, and the same components are also identified by the same reference numerals.

[0095] The difference between Example 4 and Example 1 is that the handle 30 includes a first handle 18 and a second handle 21, wherein one end of the first handle 18 is connected to the loop B01 by knotting, the other end of the first handle 18 is connected to the loop D01 by knotting, one end of the second handle 21 is connected to the loop A01 by knotting, and the other end of the second handle 21 is connected to the loop C01 by knotting. The first handle 18 and the second handle 21 are both a yellow hemp yarn with a count of 2.

[0096] Another difference between Example 4 and Example 1 is that the step (1) of disassembling the fabric bag 35 into yarns is to loosen the knot of the loop B01 of the first connecting portion 16 and the first handle 18, loosen the knot of the loop A01 and the second handle 21, and remove the first handle 18 and the second handle 21 from the first connecting portion 16; and the step (2) is to loosen the knot of the loop D01 of the second connecting portion 17 and the first handle 18, loosen the knot of the loop C01 and the second handle 21, and remove the first handle 18 and the second handle 21 from the second connecting portion 17.

[0097] Example 5

[0098] Figure 13 Another embodiment of the present application is shown, and the representation is the same as Example 1, and the same components are also identified by the same reference numerals.

[0099] The difference between Example 5 and Example 1 is that the fabric bag 34 is not provided with a handle, but a 5 count, 2 cm long jute yarn 28 is threaded through the loop B01 and the loop A01 of the first connecting portion 16 and knotted, and a 5 count, 2 cm long jute yarn 29 is threaded through the loop D01 and the loop C01 of the second connecting portion 17 and knotted.

[0100] The other difference between Example 5 and Example 1 is that the fabric bag 34 is disassembled in the following steps: (1) the knot of the jute yarn 28 threaded through the loop B01 and the loop A01 of the first connecting portion 16 is loosened, and the jute yarn 28 is removed from the first connecting portion 16; (2) the knot of the jute yarn 29 threaded through the loop D01 and the loop C01 of the second connecting portion 17 is loosened, and the jute yarn 29 is removed from the second connecting portion 17.

[0101] Example 6

[0102] The difference between Example 6 and Example 1 is that the warp yarn 26 and the weft yarn 25 of the fabric sheet 35 are both wool yarns with a count of 1.5 and an average fiber length of 60 mm.

[0103] Example 7

[0104] The difference between Example 7 and Example 1 is that the warp yarn 26 and the weft yarn 25 of the fabric sheet 35 are both acrylic yarns with a count of 1.6 and a fiber length of 51 mm.

Claims

1. A method for making woven bags using yarn, characterized in that, Either method one or method two can be used, wherein method one includes the following steps: Step 1: Weave a woven fabric sheet on a loom using a single-sided weft insertion and a single-introduction of loop double weft yarns. This results in loops formed by continuous weft yarns extending from the fabric sheet on the first and second selvages in the weft direction. The number of loops on the first selvage is even, and the loop positions are approximately symmetrical with respect to the center line of symmetry of the fabric sheet in the weft direction. Similarly, the number of loops on the second selvage is even, and the loop positions are approximately symmetrical with respect to the center line of symmetry of the fabric sheet in the weft direction. The position of the weft yarn closest to the first selvage in the warp direction is limited by at least the two warp yarns closest to the first selvage and the two warp yarns closest to the second selvage in the weft direction, preventing it from coming off the first selvage. Likewise, the position of the weft yarn closest to the second selvage in the warp direction is limited by at least the two warp yarns closest to the first selvage and the two warp yarns closest to the second selvage in the weft direction, preventing it from coming off the second selvage in the warp direction. Step 2: Fold the fabric pieces back and forth along the warp direction to form the first side, the second side, and the bottom of the fabric bag; Step 3: Interlock the two coils on the first side and the second side of the fabric piece, respectively, and then interlock the lower row of coils on the upper row of coils on the same side. Finally, lock the two coils in the uppermost row to form the first connecting part of the fabric bag. Step 4: Interlock the two loops on the second edge of the fabric piece that are located at the corresponding positions on the first and second sides respectively. Then, interlock the lower row of loops with the upper row of loops on the same side. Finally, lock the two loops at the top to form the second connecting part of the fabric bag. This completes the production of the fabric bag. Method 2 includes the following steps: Step a: Weave a woven fabric sheet on a loom using a double-sided weft insertion and single-weft insertion method. The fabric sheet has loops formed by continuous weft yarns extending from the fabric sheet on the first and second selvages in the weft direction. The number of loops on the first selvage is even, and the loop positions are approximately symmetrical with respect to the center line of symmetry of the fabric sheet in the weft direction. The number of loops on the second selvage is also even, and the loop positions are approximately symmetrical with respect to the center line of symmetry of the fabric sheet in the weft direction. The position of the weft yarn closest to the first selvage in the warp direction is limited by at least the two warp yarns closest to the first selvage and the two warp yarns closest to the second selvage in the weft direction, preventing it from coming off the first selvage in the warp direction. Similarly, the position of the weft yarn closest to the second selvage in the warp direction is limited by at least the two warp yarns closest to the first selvage and the two warp yarns closest to the second selvage in the weft direction, preventing it from coming off the second selvage in the warp direction. Step b: Fold the fabric sheet back and forth along the warp direction to form the first side, second side and bottom of the fabric bag; Step c: Interlock the two coils on the first side and the second side of the fabric piece, respectively, and then from bottom to top, the lower row of coils are interlocked with the upper row of coils on the same side. Finally, lock the two coils in the top row to form the first connecting part of the fabric bag. Step d: Interlock the two loops on the second edge of the fabric piece that are located at the corresponding positions on the first and second sides respectively. Then, from bottom to top, the loops of the lower row are sequentially interlocked on the loops of the upper row on the same side. Finally, lock the two loops located at the top row to form the second connecting part of the fabric bag. The fabric bag is now complete. The fabric bag obtained by method one or method two includes a first side, a second side, a bottom, and a first connecting portion and a second connecting portion disposed between the first side and the second side. The first side, the second side, and the bottom are formed by bending the same piece of woven fabric sheet along the warp direction. The fabric sheet has loops formed by continuous weft yarns extending from the fabric sheet on the first and second selvages in the weft direction. The number of loops on the first selvage located on the first and second sides of the fabric bag are equal and their positions correspond one-to-one. The number of loops on the second selvage located on the first and second sides of the fabric bag are equal and their positions correspond one-to-one. The first connecting portion consists of two loops on the first selvage located on the first and second sides at corresponding positions. The first connection is formed by interlocking the loops on the first and second sides of the fabric edge, then interlocking the loops on the upper side of the same side with the lower loops, and finally locking the two loops on the top side. The second connection is formed by interlocking the loops on the second fabric edge with the loops on the first and second sides respectively, then interlocking the loops on the upper side of the same side with the lower loops, and finally locking the two loops on the top side. The position of the weft yarn closest to the warp edge on the first side is defined by at least the two warp yarns closest to the first weft edge and the two warp yarns closest to the second weft edge on the second side. The position of the weft yarn closest to the warp edge on the second side is defined by at least the two warp yarns closest to the first weft edge and the two warp yarns closest to the second weft edge on the second side.

2. The method as described in claim 1, characterized in that, The locking method involves passing a yarn, thread, rope, or narrow fabric through the top two loops of the first connecting part and tying a knot, and then passing a yarn, thread, rope, or narrow fabric through the top two loops of the second connecting part and tying a knot.

3. The method as described in claim 1, characterized in that, The locking method involves passing a flexible, slender body through the two coils in the top row of the first connecting part and tying a knot, and then passing a flexible, slender body through the two coils in the top row of the second connecting part and tying a knot.

4. The method as described in claim 1, characterized in that, The locking method involves simultaneously connecting one end of the handle of the fabric bag to the two coils in the top row of the first connecting part, and simultaneously connecting the other end of the handle to the two coils in the top row of the second connecting part.

5. The method as described in claim 1, characterized in that, The locking method involves connecting one end of the first handle of the fabric bag to any one of the two coils in the top row of the first connecting part, connecting the other end of the first handle to any one of the two coils in the top row of the second connecting part, connecting one end of the second handle to a coil in the top row of the first connecting part that is not connected to the first handle, and connecting the other end of the second handle to a coil in the top row of the second connecting part that is not connected to the first handle.

6. The method according to any one of claims 1-5, characterized in that, The defined method is that two adjacent warp yarns are formed by bending the same yarn.

7. The method according to any one of claims 1-5, characterized in that, The specified method involves knotting the ends of the two warp yarns together.

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