Extrusion molding equipment for degradable plastic tablecloth

Abstract

The application relates to the technical field of polyester plastic production, in particular to an extrusion molding equipment for degradable plastic table cloth. The equipment comprises an extruder, the extruder comprises a rack, a winding roller is rotationally arranged on the rack, a plurality of uniformly distributed mounting grooves are formed in the two ends of the winding roller, and visual offset detection assemblies are arranged at the two ends of the winding roller. The device is connected with the communication cavity through the extrusion block. After the plastic table cloth is offset, the plastic table cloth extrudes the extrusion block, so that the communication cavity is triggered and the trigger agent in the communication cavity enters the observation cavity, the trigger agent dyes the transparent solution in the observation cavity, the offset of the plastic table cloth is converted into the color change visible to the naked eye, the staff can quickly observe the offset of the plastic table cloth, and the direction of the offset of the plastic table cloth can be rapidly judged according to the color change of the two observation cavities.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of polyester plastic recycling, in particular to an extrusion molding equipment for degradable plastic tablecloth. BACKGROUND

[0002] The plastic tablecloth is a tablecloth made of plastic material, which is a very common and economical practical table covering, and is mainly used for protecting the table. Since the existing plastic tablecloth is difficult to degrade, the plastic tablecloth is mainly formed into an environmentally friendly recycling system by feeding waste plastic raw materials and various auxiliary materials into an extrusion equipment, and then heating, shearing, melting and finally extruding through an extruder. After the plastic tablecloth is extruded, it is usually wound by a winding mechanism on the extruder. When the winding mechanism winds the plastic tablecloth, the stress of the plastic tablecloth changes or errors occur during the operation of the equipment, which may cause the plastic tablecloth to deviate during winding.

[0003] However, in the early stage of winding the plastic tablecloth by the existing extruder, the thickness of the plastic tablecloth wound on the winding roller is thin, and some plastic tablecloths are transparent. It is difficult for the workers to observe the deviation between the plastic tablecloth being wound and the plastic tablecloth having been wound by naked eyes, which may cause the deviation to be larger and larger during subsequent winding. Some extruders are provided with components for detecting the deviation of the plastic tablecloth during winding. These components usually take infrared sensors as the core, emit infrared rays to the tablecloth, receive the refracted light, and calculate the time difference before and after receiving the light to detect whether the deviation occurs. However, when detecting the transparent tablecloth, the infrared rays can penetrate the transparent plastic tablecloth, which may cause errors in the infrared sensor when receiving the infrared signal, resulting in misjudgment of the deviation by the detection system. Therefore, the existing extruder still has difficulty in directly detecting the deviation of the plastic tablecloth during the early stage of winding the transparent plastic tablecloth. SUMMARY

[0004] The present application provides an extrusion molding equipment for degradable plastic tablecloth, which converts the deviation of the plastic tablecloth into a visible color change, injects the color trigger into the transparent solution in the observation cavity by using the pressure of the deviated plastic tablecloth, and changes the color, thereby solving the problems in the background art, i.e.:

[0005] The conventional extruder has difficulty in directly detecting the deviation of the plastic tablecloth during the early stage of winding the transparent plastic tablecloth.

[0006] In order to achieve the above-mentioned purpose, the extrusion molding equipment of the degradable plastic table cloth comprises an extruder, the extruder comprises a rack, a winding roller is rotationally arranged on the rack, a plurality of uniformly distributed mounting grooves are formed in the two ends of the winding roller, visual offset detection assemblies are arranged at the two ends of the winding roller, the visual offset detection assemblies comprise a communication cavity arranged at one end of the winding roller and a plurality of extrusion blocks arranged in the mounting grooves, one end of the extrusion block is connected with the outside of the communication cavity, one end of the communication cavity is provided with an observation cavity, a trigger agent is loaded in the communication cavity, a transparent solution is loaded in the observation cavity, the trigger agent is used for dyeing the transparent solution, when the plastic table cloth is wound on the winding roller and deviates, the plastic table cloth will extrude the extrusion block, after the extrusion block is extruded, the trigger agent in the communication cavity enters the observation cavity, the color change of the liquid in the observation cavity is observed, the staff can directly observe the deviation of the plastic table cloth, and the staff can judge the deviation direction of the plastic table cloth.

[0007] In the above technical scheme, the extrusion block is connected with the communication cavity, after the plastic table cloth deviates, the plastic table cloth extrudes the extrusion block, so that the communication cavity is triggered and the trigger agent in the communication cavity enters the observation cavity, the trigger agent dyes the transparent solution in the observation cavity, the deviation of the plastic table cloth is converted into the color change visible to the naked eye, the staff can quickly observe the deviation of the plastic table cloth, and the color change of the observation cavities on both sides can quickly judge the deviation direction of the plastic table cloth.

[0008] On this basis, a plurality of mounting grooves penetrate the outer surface of the winding roller, the top surface of the extrusion block is arranged outside the mounting groove, and one side of the extrusion block exposed outside the mounting groove is provided with a circular arc surface.

[0009] A telescopic rod is slidably connected in the mounting groove, one end of the telescopic rod is fixedly connected with the extrusion block, a spring rod is fixedly connected to the bottom of the telescopic rod, and the spring rod is slidably connected with the mounting groove.

[0010] One end of the telescopic rod away from the extrusion block is provided with a syringe, a piston rod is slidably connected at one end of the syringe, the piston rod is fixedly connected with the telescopic rod, the other end of the syringe is provided with a one-way injection port, the one-way injection port is arranged in the communication cavity, the inside of the syringe is loaded with a trigger agent, and a one-way valve is arranged between the communication cavity and the observation cavity.

[0011] In another technical scheme, the observation cavity is provided with a visual auxiliary assembly away from the winding roller, the visual auxiliary assembly is used for mixing the trigger agent and the transparent solution in the observation cavity, and the dyeing speed of the trigger agent on the transparent solution is accelerated.

[0012] Further, the visual auxiliary assembly comprises a differential gear wheel penetratingly connected to one end of the observation cavity, one side of the rack is fixedly connected with an auxiliary wheel, the auxiliary wheel is in abutment with the outside of the differential gear wheel, and the outer surfaces of the auxiliary wheel and the differential gear wheel are rough.

[0013] The inside of the stirring cavity is hollow and loaded with a reducing agent, the reducing agent can have a reduction reaction with a trigger agent and restore the solution in the observation cavity to a transparent state.

[0014] One side of the stirring cavity is provided with a control valve, and the other side of the stirring cavity is provided with an injection port.

[0015] In the technical solution, the differential gear wheel is rotated relative to the observation cavity by cooperating with the auxiliary wheel, the solution in the observation cavity is stirred by the stirring cavity connected with the differential gear wheel, the dyeing speed of the trigger agent on the transparent solution is accelerated, the time for the staff to observe the color change is shortened, and the solution color in the observation cavity is restored to the transparent state by the reducing agent in the stirring cavity after the staff adjusts the equipment, so that the next offset detection is prepared.

[0016] Compared with the prior art, the beneficial effects of the present application are:

[0017] 1. In the extrusion molding equipment of the degradable plastic table cloth, the communication cavity is connected through the extrusion block, after the plastic table cloth is offset, the plastic table cloth extrudes the extrusion block, so as to trigger the communication cavity and make the trigger agent in the communication cavity enter the observation cavity, the trigger agent dyes the transparent solution in the observation cavity, so as to convert the offset of the plastic table cloth into color change visible to the naked eye, so that the staff can quickly observe that the plastic table cloth is offset, and quickly judge the direction of the offset of the plastic table cloth according to the color change of the two observation cavities.

[0018] 2. In the extrusion molding equipment of the degradable plastic table cloth, the differential gear wheel is rotated relative to the observation cavity by cooperating with the auxiliary wheel, the solution in the observation cavity is stirred by the stirring cavity connected with the differential gear wheel, the dyeing speed of the trigger agent on the transparent solution is accelerated, the time for the staff to observe the color change is shortened, and the solution color in the observation cavity is restored to the transparent state by the reducing agent in the stirring cavity after the staff adjusts the equipment, so that the next offset detection is prepared. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0020] Figure 2 It is a schematic diagram of part of the rack and the winding roller in the present application;

[0021] Figure 3 For the present invention Figure 2 enlarged schematic view of the structure at A in the present invention;

[0022] Figure 4 For the present invention, part of the structure of the winding roller and visual offset detection assembly schematic diagram;

[0023] Figure 5 For the present invention, the internal structure of the winding roller schematic diagram;

[0024] Figure 6 For the present invention Figure 5 enlarged schematic view of the structure at B in the present invention;

[0025] Figure 7 For the present invention, the front view of the syringe schematic diagram;

[0026] Figure 8 For the present invention, the overall structure of the communication cavity and observation cavity schematic diagram;

[0027] Figure 9 For the present invention, the front view of the observation cavity schematic diagram;

[0028] Figure 10 For the present invention, the disassembly structure of the stirring cavity schematic diagram.

[0029] The meaning of each label in the figure is:

[0030] 1, extruder; 11, frame; 12, winding roller; 121, mounting groove;

[0031] 2, visual offset detection assembly; 21, telescopic rod; 22, extrusion block; 23, spring rod; 24, circular surface; 25, syringe; 251, piston rod; 252, one-way injection port; 26, communication cavity; 27, one-way valve; 28, observation cavity;

[0032] 3, visual auxiliary assembly; 31, differential wheel; 32, stirring cavity; 33, control valve; 34, injection port; 35, auxiliary wheel. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. Example 1

[0034] The present application provides an extrusion molding equipment for degradable plastic table cloth, which can directly observe the offset of the plastic table cloth on the winding roller 12 in the early stage of winding and intuitively show the offset direction of the plastic table cloth. Figure 1 、 Figure 4 and Figure 9 The present application provides an extrusion molding equipment for degradable plastic table cloth, which can directly observe the offset of the plastic table cloth on the winding roller 12 in the early stage of winding and intuitively show the offset direction of the plastic table cloth.

[0035] Referring to Figure 2 、 Figure 4 and Figure 8 The two ends of the winding roller 12 are respectively provided with a plurality of evenly distributed mounting grooves 121, which penetrate the outer surface of the winding roller 12. The visual offset detection assembly 2 includes a plurality of extension rods 21, which are respectively slidingly connected inside the mounting grooves 121. One end of the extension rod 21 near the center of the winding roller 12 is fixedly connected with an extrusion block 22, and the top surface of the extrusion block 22 is arranged outside the mounting groove 121. The bottom surface of the one end of the extension rod 21 near the center of the winding roller 12 is fixedly connected with a spring rod 23, and the spring rod 23 is slidingly connected with the mounting groove 121. The one end of the extension rod 21 away from the extrusion block 22 is provided with an injection cylinder 25, one end of which is slidingly connected with a piston rod 251, and the other end of the injection cylinder 25 is provided with a one-way injection port 252. The piston rod 251 is fixedly connected with the extension rod 21. The visual offset detection assembly 2 further includes a communication cavity 26 fixedly connected to one end of the winding roller 12, and a plurality of one-way injection ports 252 are arranged inside the communication cavity 26. The injection cylinder 25 and the communication cavity 26 are both loaded with a trigger agent, and the composition of the trigger agent is hydrogen peroxide. The one end of the communication cavity 26 away from the winding roller 12 is fixedly connected with an observation cavity 28 made of transparent material, and the inside of the observation cavity 28 is loaded with a transparent solution. A one-way valve 27 is arranged between the communication cavity 26 and the observation cavity 28.

[0036] Referring to Figure 5 、 Figure 6 and Figure 7As shown, the spring rod 23 can support the telescopic rod 21 and keep it in a horizontal state in the initial state. When the offset of the plastic tablecloth is large, the surface of the plastic tablecloth passes the arc surface 24 of the extrusion block 22, and then the plastic tablecloth generates pressure on the extrusion block 22 under the winding of the winding roller 12, which pushes the extrusion block 22 into the mounting groove 121. At this time, the spring rod 23 is retracted, and the telescopic rod 21 moves, so that the piston rod 251 descends in the injection cylinder 25. The injection cylinder 25 injects the trigger agent into the communication cavity 26 through the one-way injection port 252. Since the communication cavity 26 has been loaded with the trigger agent, under the action of the hydraulic pressure in the communication cavity 26 and the one-way valve 27, part of the trigger agent in the communication cavity 26 enters the observation cavity 28. Since the component of the trigger agent is hydrogen peroxide, the transparent solution in the observation cavity 28 can be observed to become blue. Therefore, the staff can directly observe the offset of the plastic tablecloth winding, and after the plastic tablecloth is offset, the plastic tablecloth will extrude the extrusion block 22 in the offset direction, that is, the liquid in the observation cavity 28 in the direction will become blue, which can help the staff to judge the offset direction;

[0037] Further, the extrusion block 22 exposed at one end of the winding roller 12 is provided with a circular arc surface 24. When the plastic tablecloth on the winding roller 12 is offset, the extrusion block 22 can resist the edge position of the plastic tablecloth in the early winding stage through the circular arc surface 24, which can prevent the plastic tablecloth from being offset to a certain extent.

[0038] Further, by setting the telescopic rod 21 and making the spring rod 23 slide in the mounting groove 121, when the staff winds the plastic tablecloth on the winding roller 12, the extrusion block 22 can be slid and the edge of the extrusion block 22 is tightly attached to the edge of the plastic tablecloth, so that the visual offset detection assembly 2 can be applied to plastic tablecloth winding of different widths, and the applicability of the device is improved.

[0039] In addition, referring to Figure 9 and Figure 10 As shown, the observation cavity 28 away from one end of the winding roller 12 is provided with a visual auxiliary assembly 3. The visual auxiliary assembly 3 is used to mix the trigger agent and the liquid in the observation cavity 28, accelerate the speed of the trigger agent dyeing the transparent liquid, and also can restore the dyed liquid in the observation cavity 28 to a transparent state.

[0040] The visual auxiliary assembly 3 comprises a differential gear 31 rotatably connected at one end of the observation cavity 28, and the auxiliary wheel 35 is fixedly connected to one side of the rack 11. The outer part of the auxiliary wheel 35 is in contact with the outer part of the differential gear 31, and the outer surfaces of the auxiliary wheel 35 and the differential gear 31 are rough. The differential gear 31 is fixedly connected to a plurality of uniformly distributed stirring cavities 32 at one end inside the observation cavity 28. The stirring cavities 32 are hollow inside and loaded with a reducing agent. The reducing agent is composed of glucose. The stirring cavities 32 are provided with a control valve 33 on one side and an injection port 34 on the other side.

[0041] The other side of the rack 11 is fixedly connected to a driving member, and the output end of the driving member is in transmission connection with the observation cavity 28. The driving member is used to drive the rotating roller 12 to rotate. When the observation cavity 28 rotates, the auxiliary wheel 35 rotates relative to the observation cavity 28 through the friction force of the auxiliary wheel 35 on the differential gear 31, so as to cooperate with the stirring cavities 32 to produce a rotating stirring effect inside the observation cavity 28. After the trigger is injected into the observation cavity 28, the trigger and the liquid in the observation cavity 28 can be quickly mixed through stirring, so as to reduce the time for the trigger to completely dye the transparent liquid, facilitate the staff to quickly find that the rolling of the plastic tablecloth is deviated, shorten the time from deviation to start debugging the equipment, effectively reduce the amount of plastic tablecloth deviated, and reduce the adjustment workload of the staff;

[0042] Similarly, after the reducing agent is injected into the observation cavity 28, the differential gear 31 and the stirring cavities 32 can also stir the mixed liquid of the reducing agent, the trigger and the transparent liquid in the observation cavity 28, quickly trigger the reaction of the reducing agent and the trigger, and make the mixed liquid return to the transparent state to prepare for the next deviation trigger;

[0043] The reason why the differential gear 31 is not directly fixed with the rack 11 but is assisted in rotating through the friction of the auxiliary wheel 35 is to reduce the rotating friction between the differential gear 31 and the observation cavity 28, so as to protect the observation cavity 28 and the differential gear 31 and effectively avoid leakage at the connection part of the two;

[0044] Further, the control valve 33 is externally connected to the control assembly to control its opening and closing, and the control valve 33 also has the effect of controlling the one-way flow of liquid. The control valve 33 can only allow the liquid in the stirring cavity 32 to flow into the observation cavity 28, and the liquid in the observation cavity 28 cannot flow into the stirring cavity 32. After the staff determines that the plastic tablecloth is deviated and completes the debugging of the equipment, the control valve 33 can be opened to allow the reducing agent in the control valve 33 to flow into the observation cavity 28. At this time, the reducing agent (glucose) and the trigger agent (hydrogen peroxide) undergo an oxidation-reduction reaction, so that the liquid in the observation cavity 28 becomes transparent again, and the visualization deviation detection assembly 2 can be reused, avoiding the phenomenon that a large amount of time is consumed to reset after the visualization deviation detection assembly 2 is used once, and reducing the work burden of the staff.

[0045] The working principle of the device is as follows:

[0046] Firstly, after a certain amount of plastic tablecloth is extruded by the extruder 1, the staff winds one end of the plastic tablecloth around the winding roller 12, then according to the width of the formed plastic tablecloth, the staff successively drives the extruding blocks 22 until the edge portions of the extruding blocks 22 abut against the edges of the plastic tablecloth, and then the staff drives the winding roller 12 to rotate by starting the driving member, so as to continue the winding work of the plastic tablecloth;

[0047] During the winding process, when the plastic tablecloth deviates to one side of the winding roller 12, in the case of a small deviation, the plastic tablecloth is first blocked by the arc surface 24 of the extruding block 22, and the slope of the arc surface 24 prevents the plastic tablecloth from continuing to deviate. When the deviation is large, the plastic tablecloth will cover the slope of the arc surface 24, and under the rotation of the winding roller 12, the plastic tablecloth will press the extruding block 22, and the extruding block 22 will move into the mounting groove 121, thereby extruding the piston rod 251 under the connection of the telescopic rod 21, and the piston rod 251 gradually enters the injection cylinder 25 and injects the trigger agent in the injection cylinder 25 into the communication cavity 26 through the one-way injection port 252. Due to the change of the hydraulic pressure in the communication cavity 26, the liquid in the communication cavity 26 flows into the observation cavity 28 through the one-way valve 27, and the liquid in the observation cavity 28 is dyed;

[0048] After the trigger agent flows into the observation cavity 28, under the friction force of the auxiliary wheel 35, the differential wheel 31 rotates relative to the stirring cavity 32, so as to cooperate with the stirring cavity 32 to form stirring in the observation cavity 28, accelerate the mixing of the trigger agent and the transparent liquid in the observation cavity 28, and accelerate the dyeing speed of the transparent liquid by the trigger agent;

[0049] When the staff observes the color change of the liquid inside the observation cavity 28, the staff can quickly determine that the winding of the plastic tablecloth is deviated, and determine the direction of the deviation, then the staff can stop the equipment debugging, after the plastic tablecloth on the winding roller 12 is reset, the spring rod 23 will push the extrusion block 22 out of reset;

[0050] After the debugging is completed, the staff opens the control valve 33 to inject the reducing agent in the stirring cavity 32 into the observation cavity 28, and after the reducing agent is injected, the staff can continue to open the driving member to drive the winding roller 12 to rotate, at this time the stirring cavity 32 will still stir the mixed liquid in the observation cavity 28, so as to speed up the redox reaction rate between the reducing agent and the trigger agent, so that the liquid in the observation cavity 28 can quickly restore to the transparent state to prepare for the next deviation trigger. Embodiment 2

[0051] The application also provides a composite formula of degradable plastic tablecloth, which is prepared by using the extrusion molding equipment of the degradable plastic tablecloth provided in Embodiment 1 and contains the following components: modified PBSA 60-75%, silanized nanometer lignocellulose 10-15%, starch microspheres loaded with bacillus 5-8%, and graphene oxide 0.3-0.8%.

[0052] The modified PBSA has excellent biodegradability, preferably a PBS and PBAT blended matrix (40-60% PBS + 30-50% PBAT), 5-10% PPC to improve low-temperature toughness, 0.3-0.8% epoxy chain extender to improve processability, and 3-5% polyethylene glycol (PEG4000) to accelerate degradation.

[0053] The silanized nanometer lignocellulose can increase the tear resistance of the molded plastic tablecloth and accelerate microbial adhesion degradation.

[0054] The starch microspheres loaded with bacillus spores can activate the internal biological enzymatic action after encountering water.

[0055] The graphene oxide can enhance the decomposition response of the plastic tablecloth to ultraviolet rays, thereby accelerating the degradation speed of the plastic tablecloth.

[0056] The basic principles, main features and advantages of the application are shown and described above. Those skilled in the art should understand that the application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the application and are not intended to limit the application. Without departing from the spirit and scope of the application, various changes and improvements can be made to the application, and these changes and improvements all fall within the scope of the claimed application. The scope of protection of the application is defined by the appended claims and their equivalents.

Claims

1. An extrusion molding apparatus for a biodegradable plastic tablecloth, comprising an extruder (1), the extruder (1) comprising a frame (11), wherein a take-up roller (12) is rotatably mounted on the frame (11), characterized in that, Both ends of the take-up roller (12) are provided with several evenly distributed mounting grooves (121). Both ends of the take-up roller (12) are provided with a visual offset detection component (2). The visual offset detection component (2) includes a connecting cavity (26) provided at one end of the take-up roller (12) and several extrusion blocks (22) provided in the mounting grooves (121). One end of the extrusion block (22) is connected to the outside of the connecting cavity (26). One end of the connecting cavity (26) is provided with an observation cavity (28). 26) The interior is filled with a triggering agent. The interior of the observation cavity (28) is filled with a transparent solution. The triggering agent is used to dye the transparent solution. When the plastic tablecloth is wound on the winding roller (12) and shifts, the plastic tablecloth will squeeze the extrusion block (22). After the extrusion block (22) is squeezed, the triggering agent inside the communicating cavity (26) enters the observation cavity (28). By changing the color of the liquid in the observation cavity (28), the staff can directly observe the shift of the plastic tablecloth and help the staff judge the direction of the shift of the plastic tablecloth. Several of the mounting grooves (121) extend through the outer surface of the take-up roller (12), the top surface of the extrusion block (22) is disposed outside the mounting groove (121), and the side of the extrusion block (22) exposed outside the mounting groove (121) is provided with an arc surface (24). The mounting groove (121) is slidably connected to a telescopic rod (21). One end of the telescopic rod (21) is fixedly connected to the extrusion block (22). A spring rod (23) is fixedly connected to the bottom of the telescopic rod (21). The spring rod (23) is slidably connected to the mounting groove (121). An injection cylinder (25) is provided at one end of the telescopic rod (21) away from the extrusion block (22). A piston rod (251) is slidably connected to one end of the injection cylinder (25). The piston rod (251) is fixedly connected to the telescopic rod (21). A one-way injection port (252) is provided at the other end of the injection cylinder (25). The one-way injection port (252) is located inside the communicating cavity (26). The injection cylinder (25) is filled with a triggering agent. A one-way valve (27) is provided between the communicating cavity (26) and the observation cavity (28).

2. The extrusion molding equipment for biodegradable plastic tablecloths according to claim 1, characterized in that, A visual auxiliary component (3) is provided at one end of the observation cavity (28) away from the take-up roller (12). The visual auxiliary component (3) is used to mix the triggering agent and the transparent solution in the observation cavity (28) to accelerate the dyeing speed of the triggering agent on the transparent solution.

3. The extrusion molding equipment for biodegradable plastic tablecloths according to claim 2, characterized in that, The visual auxiliary component (3) includes a differential wheel (31) that is rotatably connected to one end of the observation cavity (28). An auxiliary wheel (35) is fixedly connected to one side of the frame (11). The auxiliary wheel (35) abuts against the outside of the differential wheel (31). The outer surfaces of the auxiliary wheel (35) and the differential wheel (31) are rough. A number of evenly distributed stirring chambers (32) are fixedly connected to one end of the differential wheel (31) inside the observation cavity (28).

4. The extrusion molding equipment for biodegradable plastic tablecloths according to claim 3, characterized in that, The stirring chamber (32) is hollow inside and is filled with a reducing agent.

5. The extrusion molding equipment for biodegradable plastic tablecloths according to claim 4, characterized in that, A control valve (33) is provided on one side of the stirring chamber (32), and an injection port (34) is provided on the other side of the stirring chamber (32).

6. The extrusion molding equipment for biodegradable plastic tablecloths according to claim 5, characterized in that, The trigger is composed of hydrogen peroxide, and the reducing agent is composed of glucose.

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