A transparent plastic woven bag and its production process

Abstract

The invention discloses a transparent plastic woven bag and a production process thereof, and relates to the field of plastic woven bags. The production process of the transparent plastic woven bag comprises the following steps: S1 extrusion film forming: preparing raw materials and feeding them into an extruder, extruding and forming films and cooling them; S2 slitting and stretching: cutting the film into embryonic filaments, heating and stretching them into flat filaments, and then heat setting and cooling them; S3 weaving and bag making: putting the flat filaments into a weaving machine for weaving, and then feeding them into a bag making machine for cutting and sewing to obtain a woven bag; S4 labeling and bagging: fixing one end of the label cloth to one side of the upper end of the woven bag, and detachably connecting the other end of the label cloth to the other side of the lower end of the woven bag after passing the other end of the label cloth around the lower end of the woven bag. When a customer needs to observe the agricultural products inside the packaging bag, uncovering the label cloth can expose most of the packaging bag area, and the shielding range is small, which is convenient for customers to observe.

Description

Technical Field

[0001] The invention relates to the field of plastic woven bags, in particular to a transparent plastic woven bag and a production process thereof. Background Art

[0002] Plastic woven bags are made of polyethylene, polypropylene and other plastics as the main raw materials, and are obtained through extrusion, shredding, weaving and bag making. Plastic woven bags are mainly used for agricultural product packaging, cement packaging, logistics packaging, etc.

[0003] For agricultural products such as potatoes and corn, plastic woven bags need to be highly transparent so that customers can clearly observe whether there are quality defects on the appearance of agricultural products without opening the bags. However, since the outer surface of the packaging bags often needs to be printed with identification information or affixed with stickers with identification information to display information such as trademarks, agricultural product types, product descriptions, and production companies, it is inevitable that some agricultural products will be blocked, thereby affecting customer observation. Summary of the invention

[0004] In order to improve the problem that identification information affects customers' all-round observation of agricultural products, the present invention provides a transparent plastic woven bag and a production process thereof.

[0005] In the first aspect, the present invention provides a production process for a transparent plastic woven bag using the following technical solution:

[0006] A production process of a transparent plastic woven bag comprises the following steps:

[0007] S1 extrusion film forming: prepare the raw materials and feed them into the extruder, extrude them into film and cool them down;

[0008] S2 slitting and stretching: the film is cut into embryonic filaments, then heated and stretched to form flat filaments, followed by heat setting and cooling;

[0009] S3 weaving bag making: put the flat wire into the weaving machine for weaving, and then send it to the bag making machine for cutting and sewing to obtain a woven bag;

[0010] S4 labeling on the bag: one end of the labeling cloth is fixedly connected to one side of the upper end of the woven bag, and the other end of the labeling cloth is passed around the lower end of the woven bag and then detachably connected to the other side of the lower end of the woven bag.

[0011] By adopting the above technical solution, the identification information is displayed by connecting the identification cloth to the outer surface of the woven bag, and the connection position and method of the identification cloth are optimized. Firstly, when the customer needs to observe the agricultural products inside the packaging bag, most of the packaging bag area can be exposed by removing the identification cloth, and the obstruction range is small, which is convenient for customers to observe; secondly, the identification cloth protects the bottom of the woven bag. When the woven bag full of agricultural products is dragged on the ground, the wear and tear of the bottom of the woven bag can be effectively reduced.

[0012] Optionally, a hot-melt adhesive strip is provided on one side of the upper end of the identification cloth, a Velcro tape is provided on one side of the lower end, and a Velcro mother tape cooperating with the Velcro tape is provided on one side of the lower end of the woven bag.

[0013] By adopting the above technical solution, the marking cloth is convenient to install and easy to uncover.

[0014] Optionally, the portion of the marking cloth located on the upper side of the hot-melt adhesive strip is a handle portion, and the portion of the marking cloth close to the lower side of the hot-melt adhesive strip and the handle portion are connected with matching magnets, and the handle portion is penetrated by a plurality of through holes for fingers to pass through.

[0015] By adopting the above technical solution, after observing the agricultural products inside the woven bag, the customer can roll up the identification cloth to make the magnets attract each other. At this time, the identification cloth forms a rolled handle, and the finger can be passed through the through hole to hold the identification cloth to facilitate lifting the woven bag.

[0016] Optionally, the S4 marking bagging is achieved by a marking machine, which includes a frame, a heat sealing component arranged on the upper side of the frame, a positioning component arranged on the lower side of the heat sealing component, and a folding component arranged on one side of the positioning component.

[0017] By adopting the above technical solution, the production efficiency of the S4 labeling and bagging step is improved.

[0018] Optionally, the positioning assembly includes a support seat connected to the frame, a side seat and a top seat slidably connected to the support seat, and a driving member connected to the support seat and used to drive the side seat and the top seat to slide, and a pressure strip is connected to one side of the upper end of the side seat and the top seat, the side edges of the woven bag are affixed to the side seat and the top seat, and the side edges of the identification cloth are affixed to the pressure strip.

[0019] By adopting the above technical solution, the woven bag is placed on the upper side of the support seat, and then the driving member is used to drive the side seat and the top seat to move downward, so that the pressure strip presses the woven bag, and then the logo is arranged on the upper side of the woven bag. At this time, the side seat, the top seat and the pressure strip can limit the position of the logo cloth and the woven bag to ensure the accuracy of the connection position.

[0020] Optionally, the driving member includes a driving cylinder and a driving plate connected to a piston rod of the driving cylinder, and the side seat and the top seat are both connected to an upper side of the driving plate.

[0021] By adopting the above technical solution, the driving cylinder can drive the side seat and the top seat to move up and down together.

[0022] Optionally, a notch corresponding to the Velcro is provided on one side of the support seat away from the top seat, a support plate is provided on one side of the notch away from the top seat, and a positioning plate is connected to one side of the support plate.

[0023] By adopting the above technical solution, the support plate plays a supporting role when the marking cloth is folded. When the folded marking cloth is connected to the woven bag, the support plate is separated and the woven bag can be removed.

[0024] Optionally, the folding assembly includes a mounting frame connected to the frame, a folding cylinder is installed on the side of the mounting frame away from the support seat, the piston rod of the folding cylinder passes through the mounting frame and is connected to the folding block, and a clamping cylinder is installed on the upper end of the mounting frame, the piston rod of the clamping cylinder is arranged vertically downward and connected to the clamping block.

[0025] By adopting the above technical solution, the marking cloth is first pressed, and then the folding block is driven, so that the end of the marking cloth is bent and adhered to the woven bag through the Velcro.

[0026] Optionally, the heat sealing assembly includes a heat sealing cylinder connected to the frame, a piston rod of the heat sealing cylinder is connected to a heat sealing plate, and a heating seat is provided at the lower side of the heat sealing plate.

[0027] By adopting the above technical solution, the heat sealing cylinder drives the heat sealing plate to move downward, so that the hot melt adhesive strip can be heated, so that the marking cloth and the woven bag are adhered.

[0028] In a second aspect, the present invention provides a transparent plastic woven bag produced by the above production process.

[0029] In summary, the present invention includes at least one of the following beneficial technical effects: the identification information is displayed by connecting the identification cloth to the outer surface of the woven bag, and the connection position and connection method of the identification cloth are optimized. Firstly, when the customer needs to observe the agricultural products inside the packaging bag, most of the packaging bag area can be exposed by uncovering the identification cloth, and the obstruction range is small, which is convenient for customers to observe; secondly, the identification cloth protects the bottom of the woven bag. When the woven bag full of agricultural products is dragged on the ground, the wear and tear of the bottom of the woven bag can be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a production process flow chart of a transparent plastic woven bag of an embodiment;

[0031] Figure 2 1 is a front view structural schematic diagram of a woven bag of an embodiment;

[0032] Figure 3 1 is a schematic diagram of the back structure of a woven bag of an embodiment;

[0033] Figure 4 It is a structural schematic diagram of a marking machine of an embodiment;

[0034] Figure 5 is a schematic structural diagram of a heat sealing assembly of an embodiment;

[0035] Figure 6 is a schematic structural diagram of a positioning assembly and a folding assembly of an embodiment;

[0036] Figure 7 It is a schematic structural diagram of the positioning assembly and the folding assembly of the embodiment in another state.

[0037] Explanation of the accompanying drawings: 1. Woven bag; 11. Velcro mother tape; 2. Marking cloth; 21. Hot-melt adhesive strip; 22. Velcro; 23. Handle; 231. Through hole; 24. Magnet; 3. Frame; 4. Heat sealing assembly; 41. Heat sealing cylinder; 42. Heat sealing plate; 43. Heating seat; 5. Positioning assembly; 51. Support seat; 511. Notch; 52. Side seat; 53. Top seat; 54. Pressing strip; 55. Driving cylinder; 56. Driving plate; 57. Support plate; 58. Positioning plate; 6. Folding assembly; 61. Folding cylinder; 62. Folding block; 63. Pressing cylinder; 64. Pressing block. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-7 The present invention is described in further detail.

[0039] Reference Figure 2 , Figure 3 A transparent plastic woven bag includes a woven bag 1 and a marking cloth 2. The woven bag 1 is made of transparent plastic material and has an opening at the upper end and a closed lower end. The marking cloth 2 is made of non-woven fabric. The width of the marking cloth 2 is smaller than the width of the woven bag 1. The outer surface of the marking cloth 2 is printed with marking information for customers to understand agricultural product information.

[0040] The length of the identification cloth 2 is greater than that of the woven bag 1. One side of the upper end of the identification cloth 2 is connected to the woven bag 1 through a hot melt adhesive strip 21. The lower end of the identification cloth 2 passes around the lower end of the woven bag 1 and is detachably connected to the woven bag 1. A Velcro 22 is fixedly connected to one side of the lower end of the identification cloth 2, and a Velcro mother patch 11 that cooperates with the Velcro 22 is fixedly connected to one side of the lower end of the woven bag 1. During installation, the identification cloth 2 is first glued to the outer surface of the woven bag 1 by heating, and then the lower end of the identification cloth 2 passes around the lower end of the woven bag 1 and is fixed by the Velcro. The hot melt adhesive strip 21 is a low-temperature adhesive and will not damage the woven bag 1 when heated and melted.

[0041] Reference Figure 2 , Figure 3 The part of the marking cloth 2 located on the upper side of the hot melt adhesive strip 21 is the handle 23. The part of the marking cloth 2 close to the lower side of the hot melt adhesive strip 21 and the handle 23 are fixedly connected with matching magnets 24. The handle 23 is penetrated by a plurality of through holes 231 for fingers to pass through. After observing the agricultural products inside the woven bag 1, when the customer needs to carry the woven bag 1, he separates the Velcro 22 and the Velcro 11, and then continuously rolls up the lower end of the marking cloth 2 to form a rolled handle. After rolling, turn down the handle 23 to make the position of the magnet 24 relatively accurate and attracted. Finally, pass the finger through the through hole 231, and then hold the marking cloth 2 to facilitate lifting the woven bag 1.

[0042] The labeling cloth 2 is connected to the outer surface of the woven bag 1 to display the labeling information, so that when the customer needs to observe the agricultural products inside the packaging bag, the labeling cloth 2 can be opened to reveal most of the packaging bag area, with a small obstruction range, which is convenient for customers to observe. In addition, the labeling cloth 2 protects the bottom of the woven bag 1, and when the woven bag 1 filled with agricultural products is dragged on the ground, it can effectively reduce the wear and tear of the bottom of the woven bag 1.

[0043] Reference Figure 1 The production process of the transparent plastic woven bag comprises the following steps:

[0044] S1 extrusion film formation: prepare the raw materials and feed them into the extruder. After extrusion into a film, the film is cooled by passing through 25°C water to obtain a film;

[0045] S2 slitting and stretching: the film is cut into embryonic filaments with a blade, and then placed in a 55°C oven, heated and stretched to form flat filaments, then placed on a hot roller for heat setting, and then placed on a cold roller for cooling;

[0046] S3 weaving bag making: putting the flat wire into a weaving machine for weaving, and then sending it to a bag making machine for cutting and sewing to obtain a woven bag 1;

[0047] S4 labeling the bag: first sew the magic mother patch 11 on one side of the lower end of the woven bag 1, then put the woven bag 1 on the labeling machine, then put the pre-made labeling cloth 2 on the woven bag 1, and then heat and melt the hot melt adhesive strip 21 to make the labeling cloth 2 and the woven bag 1 glued together, and finally fold the lower end of the labeling cloth 2 to make the magic sub-tape 22 and the magic mother patch 11 adhere to each other.

[0048] Reference Figure 4 The marking machine includes a frame 3, a heat sealing assembly 4 disposed on the upper side of the frame 3, a positioning assembly 5 disposed on the lower side of the heat sealing assembly 4, and a folding assembly 6 disposed on one side of the positioning assembly 5. The woven bag 1 and the marking cloth 2 are positioned by the positioning assembly 5, the hot melt adhesive strip 21 is heated by the heat sealing assembly 4, and the lower end of the marking cloth 2 is folded by the folding assembly 6.

[0049] Reference Figure 4 , Figure 5 The heat sealing assembly 4 includes a heat sealing cylinder 41 connected to the frame 3. The cylinder body of the heat sealing cylinder 41 is fixedly connected to the frame 3, and the piston rod is arranged vertically downward. The lower end of the piston rod of the heat sealing cylinder 41 is fixedly connected to a heat sealing plate 42, and the lower side of the heat sealing plate 42 is fixedly connected to a heating seat 43. After the heating seat 43 is powered on and heated, the heat sealing cylinder 41 is driven to move the heating seat 43 downward to align with the hot melt adhesive strip 21, so that the hot melt adhesive strip 21 can be melted through the marking cloth 2, so that the marking cloth 2 and the woven bag 1 are adhered. The heat sealing plate 42 is double-layered, and a buffer spring is arranged between the two layers of the heat sealing plate 42, thereby ensuring the compression effect on the marking cloth 2, thereby improving the heat sealing effect.

[0050] Reference Figure 4 , Figure 6 The positioning assembly 5 includes a support seat 51 fixedly connected to the frame 3, a side seat 52 and a top seat 53 slidably connected to the support seat 51, and a driving member connected to the support seat 51 and used to drive the side seat 52 and the top seat 53 to slide. The support seat 51 is in an inverted U shape, so a gap is formed between the support seat 51 and the frame 3 to facilitate the folding assembly 6 to extend into. The upper surface of the support seat 51 is used for the woven bag 1 to be laid flat, and the side seat 52 and the top seat 53 are used to limit the side of the woven bag 1.

[0051] Reference Figure 6 , Figure 7 , the spacing between the two side seats 52 is equal to the width of the woven bag 1, the two side seats 52 are arranged in parallel and are used to limit the two opposite sides of the woven bag 1, and the top seat 53 is located between one end of the two side seats 52, and is used to limit the opening side of the woven bag 1. The inner sides of the upper ends of the side seats 52 and the top seat 53 are fixedly connected with pressure strips 54, and the pressure strips 54 can press the woven bag 1 after the side seats 52 and the top seat 53 move downward. And the spacing between the pressure strips 54 at the two side seats 52 is equal to the width of the identification cloth 2. Place the woven bag 1 on the upper side of the support seat 51, and then use the driving member to drive the side seats 52 and the top seat 53 to move downward, so that the pressure strips 54 press the woven bag 1, and then place the identification cloth 2 on the upper side of the woven bag 1, and make the identification cloth 2 fit the inner side of the pressure strips 54, so that the position of the identification cloth 2 and the woven bag 1 can be limited to ensure the accuracy of the connection position.

[0052] Reference Figure 6 , Figure 7 The driving member includes a driving cylinder 55, the cylinder body of the driving cylinder 55 is fixedly connected to the frame 3, the piston rod is vertically arranged upward and fixedly connected to a driving plate 56, the driving plate 56 is located inside the support seat 51, and the side seat 52 and the top seat 53 are fixedly connected to the upper side of the driving plate 56. The driving cylinder 55 can drive the side seat 52 and the top seat 53 to move up and down together.

[0053] Reference Figure 6, Figure 7 A notch 511 corresponding to the magic mother patch 11 is provided on one side of the support seat 51 away from the top seat 53, and a support plate 57 is provided on one side of the notch 511 away from the top seat 53, and a positioning plate 58 is fixedly connected to one side of the support plate 57. Push the support plate 57 to the notch 511 and make the positioning plate 58 fit the side of the support seat 51, and then place the woven bag 1 and the identification cloth 2. The support plate 57 can play a supporting role, so that the lower ends of the woven bag 1 and the identification cloth 2 are not easy to collapse. After the magic sub-strip 22 and the magic mother patch 11 are bonded, the support plate 57 can be pulled out.

[0054] Reference Figure 6 , Figure 7 The folding assembly 6 includes a mounting frame fixedly connected to the frame 3, a folding cylinder 61 is installed on the side of the mounting frame away from the support seat 51, the cylinder body of the folding cylinder 61 is fixedly connected to the mounting frame, the piston rod passes through the mounting frame and is fixedly connected to a folding block 62, the upper side of the end of the folding block 62 close to the support seat 51 is rounded, and the upper side of the folding block 62 is flush with the lower side of the support plate 57. When the folding cylinder 61 is driven, the folding block 62 moves forward to achieve the folding of the marking cloth 2. A clamping cylinder 63 is installed on the upper end of the mounting frame, the cylinder body of the clamping cylinder 63 is fixedly connected to the mounting frame, the piston rod is vertically downward and fixedly connected to a clamping block 64, after the clamping cylinder 63 is driven, the clamping block 64 can clamp the marking cloth 2 placed on the support plate 57 to prevent the position of the marking cloth 2 from shifting during the folding process.

[0055] The implementation principle of the marking machine is:

[0056] The first step is to lay the woven bag 1 flat on the upper surface of the support seat 51, and make the side edges fit the side seats 52 and the top edges fit the top seats 53, and then start the driving cylinder 55 so that the pressure strips 54 press the side edges of the woven bag 1;

[0057] In the second step, the marking cloth 2 is then laid flat on the upper surface of the woven bag 1, and the side is attached to the inner side of the pressure strip 54. At this time, the lower end of the marking cloth 2 will naturally hang down from the side of the support plate 57 away from the top seat 53;

[0058] The third step is to start the pressing cylinder 63, so that the pressing block 64 moves downward and presses the marking cloth 2 onto the supporting plate 57;

[0059] Step 4: Start the folding cylinder 61 and the heat sealing cylinder 41, so that the heating seat 43 moves down and heats the hot melt adhesive strip 21, and the folding block 62 moves forward to push the lower end of the hanging label cloth 2 inward until the Velcro 22 and the Velcro mother tape 11 are adhered;

[0060] The fifth step is to pull out the support plate 57 and use the driving cylinder 55 to move up the side seat 52 and the top seat 53, and finally remove the woven bag 1 with the marking cloth 2.

[0061] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A production process for transparent plastic woven bags, characterized in that: The steps include: S1 extrusion film forming: prepare the raw materials and feed them into the extruder, extrude them into film and cool them down; S2 slitting and stretching: the film is cut into embryonic filaments, then heated and stretched to form flat filaments, followed by heat setting and cooling; S3 weaving bag making: putting the flat yarn into a weaving machine for weaving, and then sending it to a bag making machine for cutting and sewing to obtain a woven bag (1); S4 labeling the bag: one end of the labeling cloth (2) is fixedly connected to one side of the upper end of the woven bag (1), and the other end of the labeling cloth (2) is passed around the lower end of the woven bag (1) and then detachably connected to the other side of the lower end of the woven bag (1).

2. The production process of a transparent plastic woven bag according to claim 1, characterized in that: The upper end of the identification cloth (2) is provided with a hot melt adhesive strip (21), and the lower end is provided with a Velcro tape (22), and the lower end of the woven bag (1) is provided with a Velcro tape (11) that cooperates with the Velcro tape (22).

3. The production process of a transparent plastic woven bag according to claim 2, characterized in that: The portion of the marking cloth (2) located on the upper side of the hot-melt adhesive strip (21) is a handle portion (23), and the portion of the marking cloth (2) close to the lower side of the hot-melt adhesive strip (21) and the handle portion (23) are both connected with matching magnets (24), and the handle portion (23) is penetrated by a plurality of through holes (231) for fingers to pass through.

4. The production process of a transparent plastic woven bag according to claim 2, characterized in that: The S4-marked bagging is achieved by a marking machine, which comprises a frame (3), a heat sealing component (4) arranged on the upper side of the frame (3), a positioning component (5) arranged on the lower side of the heat sealing component (4), and a folding component (6) arranged on one side of the positioning component (5).

5. The production process of a transparent plastic woven bag according to claim 4, characterized in that: The positioning assembly (5) comprises a support seat (51) connected to the frame (3), a side seat (52) and a top seat (53) slidably connected to the support seat (51), and a driving member connected to the support seat (51) and used for driving the side seat (52) and the top seat (53) to slide, and a pressure strip (54) is connected to one side of the upper end of each of the side seat (52) and the top seat (53), the side edge of the woven bag (1) is attached to the side seat (52) and the top seat (53), and the side edge of the identification cloth (2) is attached to the pressure strip (54).

6. The production process of a transparent plastic woven bag according to claim 5, characterized in that: The driving member comprises a driving cylinder (55) and a driving plate (56) connected to a piston rod of the driving cylinder (55), and the side seat (52) and the top seat (53) are both connected to the upper side of the driving plate (56).

7. The production process of a transparent plastic woven bag according to claim 5, characterized in that: A notch (511) corresponding to the Velcro (11) is provided through the side of the support seat (51) away from the top seat (53), a support plate (57) is provided on the side of the notch (511) away from the top seat (53), and a positioning plate (58) is connected to one side of the support plate (57).

8. The production process of a transparent plastic woven bag according to claim 7, characterized in that: The folding assembly (6) comprises a mounting frame connected to the frame (3), a folding cylinder (61) is mounted on a side of the mounting frame away from the support seat (51), a piston rod of the folding cylinder (61) passes through the mounting frame and is connected to a folding block (62), a pressing cylinder (63) is mounted on the upper end of the mounting frame, and the piston rod of the pressing cylinder (63) is arranged vertically downward and is connected to a pressing block (64).

9. The production process of a transparent plastic woven bag according to claim 4, characterized in that: The heat sealing assembly (4) comprises a heat sealing cylinder (41) connected to the frame (3); a piston rod of the heat sealing cylinder (41) is connected to a heat sealing plate (42); a heating seat (43) is provided at the lower side of the heat sealing plate (42).

10. A transparent plastic woven bag, characterized by: The method is prepared by the production process described in any one of claims 1 to 9.

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