Degradable braided bag and its processing method

Abstract

The application relates to the technical field of woven bags, in particular to a degradable woven bag and a processing method thereof, which comprises the following steps: S1, weighing degradable plastic, additives and color masterbatch; S2, putting the raw materials into a mixer; S3, putting the mixed raw materials into an extruder to extrude plastic film; S4, cutting a part of the plastic film and putting the plastic film into a weaving machine to weave a semi-finished woven bag; S5, embedding the plastic film which is not cut into the semi-finished woven bag through an embedding device; and S6, cutting and sealing the semi-finished woven bag after embedding, and completing the processing of the woven bag. The embedding device comprises a support, an evacuation shell is fixedly connected to the upper side of the support, a sleeve is slidably connected to the inner side of the evacuation shell, grating plates are arranged on the periphery of the sleeve, evacuation pipes are fixedly connected to the periphery of the evacuation shell, a blower is fixedly connected to the bottom of the support, a distributor is fixedly connected to the tail end of the blower, and distribution pipes are fixedly connected to the periphery of the distributor. The degradable woven bag can contain liquid.

Description

Technical Field

[0001] This invention relates to the field of woven bag technology, and more specifically to a biodegradable woven bag and its processing method. Background Technology

[0002] Biodegradable woven bags are an environmentally friendly packaging material. They are made of biodegradable plastic, which can be decomposed into water and carbon dioxide by microorganisms. Therefore, biodegradable woven bags will not cause long-term pollution in the natural environment.

[0003] However, biodegradable woven bags have weak performance. Due to the weaving method, there will be gaps in the bag body, which cannot contain liquid objects. Currently, this shortcoming is made up for by sewing plastic bags on the inside of the woven bags. However, in order to facilitate storage, woven bags are usually flat after weaving. At the same time, woven bags are lightweight and easily affected by static electricity, making it inconvenient to embed plastic bags inside the woven bags. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a biodegradable woven bag and its processing method, which has the advantage of facilitating the preparation of biodegradable woven bags capable of containing liquids.

[0005] A method for processing biodegradable woven bags, the method comprising the following steps:

[0006] S1: Weigh out the biodegradable plastics, additives, and colorant masterbatch;

[0007] S2: Put the ingredients into a mixer and mix;

[0008] S3: The mixed raw materials are fed into an extruder and extruded into a plastic film;

[0009] S4: Cut a portion of the plastic film into strips and put them into a weaving machine to weave into a semi-finished woven bag;

[0010] S5: The uncut plastic film is fitted into the semi-finished woven bag using an inserting device;

[0011] S6: After the semi-finished woven bags are assembled, they are divided and sealed to complete the woven bag processing.

[0012] Furthermore, the biodegradable plastics in step S1 include polylactic acid, polyhydroxyalkanoates, and polycaprolactone.

[0013] Furthermore, the additives in step S1 include starch, photosensitizer, and biodegradable agent.

[0014] Furthermore, the sealing step in step S6 includes heat pressing and sewing.

[0015] Furthermore, in step S5, the mounting device includes a bracket, a vacuum shell is fixedly connected to the upper side of the bracket, a sleeve is slidably connected to the inner side of the vacuum shell, grid plates are machined around the sleeve, vacuum pipes are fixedly connected around the vacuum shell, a blower is fixedly connected to the bottom of the bracket, a distributor is fixedly connected to the end of the blower, a distribution pipe is fixedly connected around the distributor, and conduits are fixedly connected between the four distribution pipes and the four vacuum pipes respectively.

[0016] A biodegradable woven bag comprises the following raw materials by weight: 50-60 parts of polylactic acid, 10-15 parts of polyhydroxyalkanoate, 10-15 parts of polycaprolactone, 3-5 parts of starch, 1-2 parts of photosensitizer, 1-2 parts of biodegradable agent, and 5-10 parts of colorant masterbatch. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0018] Figure 1 This is a schematic diagram of the process for processing biodegradable woven bags in this invention;

[0019] Figure 2 This is a schematic diagram of the mounting device in the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the support and distributor in this invention;

[0021] Figure 4 This is a schematic diagram of the support structure in this invention;

[0022] Figure 5 This is a schematic diagram of the distributor in this invention;

[0023] Figure 6 This is a schematic diagram of the structure of the vacuum shell and sleeve in this invention;

[0024] Figure 7 This is a schematic diagram of the structure of the vacuum shell in this invention;

[0025] Figure 8 This is a schematic diagram of the sleeve structure in this invention;

[0026] Figure 9 This is a schematic diagram of the support ring and arc rod in this invention;

[0027] Figure 10 This is a schematic diagram of the support ring structure in this invention;

[0028] Figure 11 This is a schematic diagram of the arc rod in this invention.

[0029] In the diagram: bracket 101; blower 102; support rod 103; pressure roller 104; motor 105;

[0030] Distributor 201; Distributor tube 202; Conduit 203;

[0031] 301; 302; 303; 304;

[0032] Sleeve 401; Grid plate 402; Limiting plate 403; Slot 404;

[0033] Support ring 501; Ring groove 502;

[0034] Arc rod 601; spring 602; slide rod 603; connecting pipe 604; connecting plate 605; rotating shaft 606. Detailed Implementation

[0035] A method for processing biodegradable woven bags, the method comprising the following steps:

[0036] S1: Weigh out the biodegradable plastics, additives, and colorant masterbatch;

[0037] S2: Put the ingredients into a mixer and mix;

[0038] S3: The mixed raw materials are fed into an extruder and extruded into a plastic film;

[0039] S4: Cut a portion of the plastic film into strips and put them into a weaving machine to weave into a semi-finished woven bag;

[0040] S5: The uncut plastic film is fitted into the semi-finished woven bag using an inserting device;

[0041] S6: After the semi-finished woven bags are assembled, they are divided and sealed to complete the woven bag processing.

[0042] Furthermore, the biodegradable plastics in step S1 include polylactic acid, polyhydroxyalkanoates, and polycaprolactone.

[0043] Furthermore, the additives in step S1 include starch, photosensitizer, and biodegradable agent.

[0044] Furthermore, the sealing step in step S6 includes heat pressing and sewing.

[0045] like Figures 1-8 As shown, this example demonstrates how to easily manufacture woven bags capable of holding liquids.

[0046] In the biodegradable woven bag processing method, step S5, the inserting device includes a support 101. A vacuum shell 301 is fixedly connected to the upper side of the support 101. A sleeve 401 is slidably connected to the inner side of the vacuum shell 301. A grid plate 402 is processed around the sleeve 401. Vacuum pipes 302 are fixedly connected around the vacuum shell 301. A blower 102 is fixedly connected to the bottom of the support 101. A distributor 201 is fixedly connected to the end of the blower 102. Distribution pipes 202 are fixedly connected around the distributor 201. A conduit 203 is fixedly connected between each of the four distribution pipes 202 and the four vacuum pipes 302. The end of the semi-finished woven bag is opened, and a complete plastic film is placed in the middle of the opened woven bag. The woven bag and plastic film are then moved through the inside of the sleeve 401. During the movement of the woven bag and plastic film inside the sleeve 401, the blower 102 is activated, and the material is then transported through the distributor 201, distribution pipes 202, and conduits 203. The gas inside the evacuation shell 301 is extracted through the evacuation pipe 302, and then the gas inside the sleeve 401 is drawn into the evacuation shell 301 through the grid plate 402. The gas inside the sleeve 401 is then extracted by the blower 102, thereby reducing the air pressure inside the sleeve 401. Since the plastic film has no gaps, the gas difference between the outer and inner sides of the plastic film expands the plastic film. At the same time, since the woven bag film has gaps, the gas between the plastic film and the woven bag is extracted, which facilitates the plastic film to adhere to the inner side of the woven bag. The plastic film prevents liquid leakage from the inner side of the woven bag, thereby realizing the preparation of a woven bag that can contain liquid. By expanding the plastic film, the plastic film adheres to the inner side of the woven bag, thereby avoiding wrinkles during the process of embedding the plastic film into the woven bag, thus facilitating the embedding of the plastic film into the inner side of the woven bag, thereby achieving the effect of facilitating the preparation of a woven bag that can contain liquid.

[0047] The distributor 201 can evenly transmit the suction provided by the blower 102 to the four distribution pipes 202, thereby maintaining the same suction in the four conduits 203. This results in the same and uniform suction on the vacuum shell 301 through the four vacuum pipes 302, thus maintaining the same suction in all directions on the plastic film. This makes it easier for the expanded plastic film to be subjected to uniform force in all directions, thereby making it easier for the plastic film to maintain its shape after being expanded, and thus making it easier to bond the plastic film and the woven bag.

[0048] The grid plate 402 can maintain the air flow between the inside and outside of the sleeve 401 while providing support for the expanded plastic film, restricting the position of the plastic film, and further achieving the effect of facilitating the embedding of the plastic film into the inside of the woven bag.

[0049] like Figures 1-8 As shown, this example can help achieve the effect of uniformly extracting gas from the outside of the plastic film.

[0050] In the biodegradable woven bag processing method, four partitions 303 are fixedly connected to the inner side of the vacuum shell 301, each partition 303 is located between two adjacent vacuum tubes 302, and a retaining plate 304 is fixedly connected to the inner side of each partition 303. Four limiting plates 403 are fixedly connected to the outer side of the sleeve 401, each limiting plate 403 is located between two adjacent grid plates 402, and a slot 404 is machined in each limiting plate 403. The four retaining plates 304 are slidably connected in the four slots 404 respectively. The partitions 303 and the limiting plates 403 separate the multiple vacuum tubes 302 and the grid plates 402, so that each vacuum tube 302 only extracts the gas inside the corresponding grid plate 402, thereby avoiding the mutual influence of the suction force between multiple vacuum tubes 302, and thus helping to achieve the effect of uniformly extracting the gas outside the plastic film.

[0051] The sliding of the clamping plate 304 within the clamping groove 404 facilitates the disassembly and maintenance of the sleeve 401, thereby preventing the grid plate 402 from becoming blocked and affecting the gas extraction effect. The clamping plate 304 and the clamping groove 404 limit the angle of the sleeve 401 after installation, thereby preventing the sleeve 401 from rotating. At the same time, it is convenient to arrange the grid plate 402 inside the evacuation pipe 302 when installing the sleeve 401, thereby facilitating the extraction of gas inside the grid plate 402.

[0052] like Figures 1-5 As shown in Figure 9-11, this example can achieve the effect of opening up the ends of a semi-finished woven bag.

[0053] In the biodegradable woven bag processing method, a support ring 501 is fixedly connected to the upper front end of the bracket 101. A ring groove 502 is processed on the inner side of the support ring 501. Four arc rods 601 are nested inside the ring groove 502. A spring 602 is fixedly connected between every two adjacent arc rods 601. The end of the semi-finished woven bag is placed between the arc rods 601 and the ring groove 502. The position of the semi-finished woven bag is controlled by the support ring 501. At the same time, the inner side of the woven bag is supported by the arc rods 601, thereby achieving the effect of opening up the end of the semi-finished woven bag.

[0054] The position of the arc rod 601 is restricted by the annular groove 502, thereby confining the arc rod 601 within the annular groove 502 and preventing the arc rod 601 from detaching. Multiple arc rods 601 are connected by springs 602. When the semi-finished woven bag is subjected to external force, the external force is transmitted to the springs 602 through the arc rods 601. Thus, the contact connection between the arc rod 601 and the semi-finished woven bag is a flexible connection, thereby preventing the arc rod 601 from damaging the semi-finished woven bag and providing protection for the semi-finished woven bag.

[0055] like Figures 1-5 As shown in Figures 9-11, this example allows for easy insertion of the end of the semi-finished woven bag between the arc rod 601 and the annular groove 502.

[0056] The biodegradable woven bag processing method also includes a connecting plate 605, with hollow connecting tubes 604 fixedly connected to all four sides of the connecting plate 605. Each arc rod 601 has a sliding rod 603 fixedly connected to its inner side. The four sliding rods 603 are slidably connected within the four connecting tubes 604. A rotating shaft 606 is rotatably connected inside the connecting plate 605. Sliding the sliding rods 603 inward causes them to slide within the connecting tubes 604, which in turn causes the spring 602 to contract, reducing the distance between adjacent arc rods 601 and thus reducing the diameter of the connected arc rods 601. This facilitates placing the multiple arc rods 601 into the support ring 501. Afterward, the sliding rods 603 are released. 3. The elastic force generated by the elastic deformation of the contracted spring 602 pushes the arc rod 601 to move to both sides, thereby causing the slide rod 603 to slide outward within the connecting tube 604, thus increasing the diameter of the multiple arc rods 601 after connection, and pushing the arc rods 601 into the annular groove 502. Thus, the diameter of the multiple arc rods 601 connected by the spring 602 is variable, making it easy to place the end of the semi-finished woven bag between the multiple arc rods 601 with a reduced diameter. Afterward, the arc rods 601 can be re-embedded in the annular groove 502 under the drive of the spring 602, thereby achieving the effect of facilitating the placement of the end of the semi-finished woven bag between the arc rods 601 and the annular groove 502.

[0057] The positions of multiple sliding rods 603 can be fixed by the connecting plate 605 and the connecting tube 604, thereby stabilizing the position of the arc rod 601, improving the stability of the connection of multiple arc rods 601, and maintaining the shape stability of the arc rod 601.

[0058] The complete plastic film is wrapped around the rotating shaft 606. While moving the semi-finished woven bag, the plastic film is moved along with it, thus achieving the effect of placing the complete plastic film in the middle of the unfolded woven bag. The rotating shaft 606 rotates inside the connecting plate 605, and the plastic film moves, which drives the rotating shaft 606 to rotate. This reduces the tension on the plastic film when it moves, thus preventing the plastic film from being torn.

[0059] like Figures 1-4 As shown, this example can achieve the effect of segmenting semi-finished woven bags after the plastic film is embedded.

[0060] In the biodegradable woven bag processing method, two symmetrical support rods 103 are fixedly connected to the upper end of the bracket 101. Two pressure rollers 104 are rotatably connected to the upper ends of the two support rods 103. A motor 105 that drives one of the pressure rollers 104 to rotate is fixedly connected to one of the support rods 103. The motor 105 drives the pressure roller 104 to rotate, and then drives the other pressure roller 104 to rotate through friction. The semi-finished woven bag with embedded plastic film is placed between the two pressure rollers 104. Then, through the squeezing and rotation between the two pressure rollers 104, the semi-finished woven bag between the two pressure rollers 104 is moved, which in turn drives the semi-finished woven bag and plastic film at the rear to move, thereby achieving the effect of driving the semi-finished woven bag and plastic film to move.

[0061] At the same time, the air inside the stretched plastic film is squeezed out by the pressure of the two pressure rollers 104, and the semi-finished woven bag is flattened, which makes it easier to cut the semi-finished woven bag and achieves the effect of dividing the semi-finished woven bag after the plastic film is embedded.

[0062] A biodegradable woven bag comprises the following raw materials by weight: 50 parts polylactic acid, 10 parts polyhydroxyalkanoate, 10 parts polycaprolactone, 3 parts starch, 1 part photosensitizer, 1 part biodegradable agent, and 5 parts colorant masterbatch.

Claims

1. A method for processing biodegradable woven bags, characterized in that: The method includes the following steps: S1: Weigh out the biodegradable plastics, additives, and colorant masterbatch; S2: Put the ingredients into a mixer and mix; S3: The mixed raw materials are fed into an extruder and extruded into a plastic film; S4: Cut a portion of the plastic film into strips and put them into a weaving machine to weave into a semi-finished woven bag; S5: The uncut plastic film is fitted into the semi-finished woven bag using an inserting device; S6: After the semi-finished woven bags are assembled, they are divided and sealed to complete the woven bag processing.

2. The method for processing biodegradable woven bags according to claim 1, characterized in that: The biodegradable plastics in step S1 include polylactic acid, polyhydroxyalkanoates, and polycaprolactone.

3. The method for processing biodegradable woven bags according to claim 1, characterized in that: The additives in step S1 include starch, photosensitizer, and biodegradable agent.

4. The method for processing biodegradable woven bags according to claim 1, characterized in that: The sealing step in step S6 includes heat pressing and sewing.

5. The method for processing biodegradable woven bags according to claim 1, characterized in that: The mounting device in step S5 includes a bracket (101), a vacuum shell (301) fixedly connected to the upper side of the bracket (101), a sleeve (401) slidably connected to the inner side of the vacuum shell (301), a grid plate (402) processed around the sleeve (401), a vacuum pipe (302) fixedly connected around the vacuum shell (301), a blower (102) fixedly connected to the bottom of the bracket (101), a distributor (201) fixedly connected to the end of the blower (102), a distribution pipe (202) fixedly connected around the distributor (201), and a conduit (203) fixedly connected between the four distribution pipes (202) and the four vacuum pipes (302).

6. The method for processing biodegradable woven bags according to claim 5, characterized in that: The inner side of the evacuation shell (301) is fixedly connected to four partitions (303), each partition (303) is disposed between two adjacent evacuation pipes (302), and each partition (303) is fixedly connected to a retaining plate (304). The outer side of the sleeve (401) is fixedly connected to four limiting plates (403), each limiting plate (403) is disposed between two adjacent grid plates (402), and each limiting plate (403) is machined with a retaining groove (404). The four retaining plates (304) are slidably connected in the four retaining grooves (404).

7. The method for processing biodegradable woven bags according to claim 6, characterized in that: A support ring (501) is fixedly connected to the upper front end of the bracket (101). A ring groove (502) is machined on the inner side of the support ring (501). Four arc rods (601) are nested inside the ring groove (502). A spring (602) is fixedly connected between each pair of adjacent arc rods (601).

8. The method for processing biodegradable woven bags according to claim 7, characterized in that: It also includes a connecting plate (605), with hollow connecting pipes (604) fixed around the connecting plate (605), and a sliding rod (603) fixed inside each arc rod (601). The four sliding rods (603) are slidably connected inside the four connecting pipes (604), and a rotating shaft (606) is rotatably connected inside the connecting plate (605).

9. A method for processing biodegradable woven bags according to claim 8, characterized in that: Two symmetrical support rods (103) are fixedly connected to the upper end of the bracket (101). Two pressure rollers (104) are rotatably connected to the upper ends of the two support rods (103). A motor (105) that drives one of the pressure rollers (104) to rotate is fixedly connected to one of the support rods (103).

10. A biodegradable woven bag prepared by a biodegradable woven bag processing method according to any one of claims 1-9, characterized in that, The raw materials include the following components by weight: 50-60 parts polylactic acid, 10-15 parts polyhydroxy fatty acid ester, 10-15 parts polycaprolactone, 3-5 parts starch, 1-2 parts photosensitizer, 1-2 parts biodegradable agent, and 5-10 parts colorant masterbatch.

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