阅读说明：本技术 一种环保垃圾袋制备材料及其制备方法 (Environment-friendly garbage bag preparation material and preparation method thereof ) 是由 朱远忠 桂茂生 张先进 于 2020-05-21 设计创作，主要内容包括：本发明公开一种环保垃圾袋制备材料及其制备方法,本发明通过防臭复合材料的添加,使得制备而成的垃圾袋在降解过程中不会产生臭味,通过EVA的添加,使得制备而成的垃圾袋具有良好的缓冲、抗震、隔热、防潮、抗化学腐蚀、防菌防水等优点,且无毒、不吸水,该环保垃圾袋制备材料的制备过程简单,根据实验测得,由该环保垃圾袋制备材料制备得到的0.03mm的可降解垃圾袋的7天降解程度为10-13％,解决现有技术中垃圾袋不易降解,容易污染环境的技术问题。(The invention discloses a preparation material of an environment-friendly garbage bag and a preparation method thereof, the prepared garbage bag does not generate odor in the degradation process by adding a deodorization composite material, the prepared garbage bag has the advantages of good buffering, shock resistance, heat insulation, moisture resistance, chemical corrosion resistance, bacteria resistance, water resistance and the like by adding EVA, and is nontoxic and non-absorbent, the preparation process of the preparation material of the environment-friendly garbage bag is simple, the 7-day degradation degree of the 0.03mm degradable garbage bag prepared from the preparation material of the environment-friendly garbage bag is 10-13% according to the experimental test, and the technical problems that the garbage bag is not easy to degrade and the environment is easily polluted in the prior art are solved.)

1. The environment-friendly garbage bag preparation material is characterized by being prepared from the following raw materials in parts by weight: 20-70 parts of polyethylene, 10-30 parts of EVA (ethylene vinyl acetate), 3-7 parts of filler, 2.5-4.5 parts of odorless foaming agent, 0.3-0.7 part of odorless coupling agent, 0.5-1.5 parts of zinc oxide powder, 0.1-0.5 part of stearic acid, 0.5-1 part of plasticizer, 0.5-1.2 parts of preservative, 0.22-0.28 part of free radical inhibitor, 0.22-0.28 part of flexibilizer, 0.5-2 parts of color master batch and 1.5-3.5 parts of deodorant composite material;

the environment-friendly garbage bag preparation material is prepared by the following steps:

the method comprises the following steps: weighing polyethylene and EVA, adding the polyethylene and the EVA into a reactor, heating and melting, adding a filler, an odorless foaming agent, an odorless coupling agent, zinc oxide powder, stearic acid, a plasticizer, a preservative, a free radical resistant agent and a toughening agent into the reactor, and mixing and stirring to obtain a premix;

step two: keeping the premix in a molten state, weighing the color master batch and the deodorant composite material, adding the color master batch and the deodorant composite material into a reactor, and mixing and stirring to obtain a mixture;

step three: putting the mixture into a screw extruder, and cooling after extrusion to obtain a granular environment-friendly garbage bag preparation material;

step four: granular environment-friendly garbage bag preparation materials are poured into storage hoppers of packaging equipment, granules respectively enter two feeding hoppers, packaging bottles are placed in positioning grooves in a conveying belt, a fourth motor is started, an output shaft of the fourth motor is matched with a fourth commutator to drive one of driving rollers to rotate, the two driving rollers drive the conveying belt to rotate, the packaging bottles are conveyed towards a packaging frame, after two adjacent packaging bottles are conveyed to the lower part of the packaging hopper, the conveying belt stops conveying, a piston rod of a telescopic cylinder pushes the packaging hopper downwards, the bottom of the packaging hopper is inserted into the top of the packaging bottles, an output shaft of the third motor is matched with a third commutator to drive a third driving rod to rotate, the third driving rod is matched with a third rotating sheet to drive an adjusting screw rod and a third pull rod to rotate so as to drive two first bottle clamping arms and two second bottle clamping arms to clamp and fix the tops of the packaging bottles, the two first motor output shafts are matched with corresponding first commutators to drive the first, first actuating lever cooperation first rotor plate and first pull rod drive the hopper door and rotate, the granule gets into in the weighing hopper of below from the hopper in, second motor output shaft cooperation second commutator drives the second actuating lever and rotates, second actuating lever cooperation second rotor plate, the hopper door rotates along the main shaft pole under the second pull rod drives, the granule gets into in the packing fill of below from the weighing hopper in, finally get into in the packing bottle, first double-layered bottle arm after the packing, the double-layered bottle arm of second cancels the centre gripping of packing bottle both sides, then telescopic cylinder piston rod shrink, the packing hopper is mentioned, accomplish packing bottle packing.

2. The environment-friendly garbage bag preparation material as claimed in claim 1, which is prepared from the following raw materials in parts by weight: 20 parts of polyethylene, 10 parts of EVA (ethylene vinyl acetate), 3 parts of filler, 2.5 parts of odorless foaming agent, 0.3 part of odorless coupling agent, 0.5 part of zinc oxide powder, 0.1 part of stearic acid, 0.5 part of plasticizer, 0.5 part of preservative, 0.22 part of anti-free radical agent, 0.22 part of flexibilizer, 0.5 part of color master batch and 1.5 parts of deodorant composite material.

3. The preparation method of the environment-friendly garbage bag preparation material is characterized by comprising the following steps of:

the method comprises the following steps: weighing polyethylene and EVA, adding the polyethylene and the EVA into a reactor, heating and melting, adding a filler, an odorless foaming agent, an odorless coupling agent, zinc oxide powder, stearic acid, a plasticizer, a preservative, a free radical resistant agent and a toughening agent into the reactor, and mixing and stirring to obtain a premix;

step two: keeping the premix in a molten state, weighing the color master batch and the deodorant composite material, adding the color master batch and the deodorant composite material into a reactor, and mixing and stirring to obtain a mixture;

step three: putting the mixture into a screw extruder, and cooling after extrusion to obtain a granular environment-friendly garbage bag preparation material;

step four: granular environment-friendly garbage bag preparation materials are poured into storage hoppers of packaging equipment, granules respectively enter two feeding hoppers, packaging bottles are placed in positioning grooves in a conveying belt, a fourth motor is started, an output shaft of the fourth motor is matched with a fourth commutator to drive one of driving rollers to rotate, the two driving rollers drive the conveying belt to rotate, the packaging bottles are conveyed towards a packaging frame, after two adjacent packaging bottles are conveyed to the lower part of the packaging hopper, the conveying belt stops conveying, a piston rod of a telescopic cylinder pushes the packaging hopper downwards, the bottom of the packaging hopper is inserted into the top of the packaging bottles, an output shaft of the third motor is matched with a third commutator to drive a third driving rod to rotate, the third driving rod is matched with a third rotating sheet to drive an adjusting screw rod and a third pull rod to rotate so as to drive two first bottle clamping arms and two second bottle clamping arms to clamp and fix the tops of the packaging bottles, the two first motor output shafts are matched with corresponding first commutators to drive the first, first actuating lever cooperation first rotor plate and first pull rod drive the hopper door and rotate, the granule gets into in the weighing hopper of below from the hopper in, second motor output shaft cooperation second commutator drives the second actuating lever and rotates, second actuating lever cooperation second rotor plate, the hopper door rotates along the main shaft pole under the second pull rod drives, the granule gets into in the packing fill of below from the weighing hopper in, finally get into in the packing bottle, first double-layered bottle arm after the packing, the double-layered bottle arm of second cancels the centre gripping of packing bottle both sides, then telescopic cylinder piston rod shrink, the packing hopper is mentioned, accomplish packing bottle packing.

4. The method for preparing the material for preparing the environment-friendly garbage bag according to claim 3, wherein the filler is talcum powder, the odorless foaming agent is a sulfonyl hydrazine compound, the odorless coupling agent is a titanate coupling agent, the plasticizer is di (2-ethylhexyl) phthalate, the preservative is selected from rosin or aloe vera gel, the anti-free radical agent is glycyrrhetinic acid, and the toughening agent is poly (ethylene glycol succinate).

5. The method for preparing the material for preparing the environment-friendly garbage bag according to claim 3, wherein the deodorization composite material is a mixture containing zinc acetate and an anion material, a phosphate antibacterial agent, a silicate antibacterial agent, a zeolite antibacterial agent, an oxide antibacterial agent and a rare earth activated inorganic antibacterial agent, the particle size of the deodorization composite material is 20 nanometers to 1.5 micrometers, the anion material is a mineral composite material containing rare earth, the rare earth is a composite oxide of one or more of cerium, neodymium and lanthanum, and the mineral composite material is a composition of tourmaline, quartz and kaolin.

6. The method for preparing the material for the environmental garbage bag as defined in claim 3, wherein the temperature of the first zone of the screw extruder in the third step is 250-.

7. The method as claimed in claim 3, wherein the mixing and stirring time of the reactor in the step one is 20-30min, the stirring temperature is 50-70 ℃, and the stirring speed is 1500 r/min.

8. The method as claimed in claim 3, wherein the mixing and stirring time of the reactor in the step two is 10-15min, the stirring temperature is 45-60 ℃, and the stirring speed is 800-1000 r/min.

9. The method for preparing the environment-friendly garbage bag preparing material as claimed in claim 3, wherein the packaging equipment works as follows:

the method comprises the following steps: granular environment-friendly garbage bag preparation materials are poured into a storage hopper, granules respectively enter two feeding hoppers, packaging bottles are placed in positioning grooves in a conveying belt, a fourth motor is started, an output shaft of the fourth motor is matched with a fourth commutator to drive one of driving rollers to rotate, the two driving rollers drive the conveying belt to rotate, the packaging bottles are conveyed towards a packaging frame direction, after two adjacent packaging bottles are conveyed to the lower side of the packaging hopper, the conveying belt stops conveying, a telescopic cylinder piston rod pushes the packaging hopper downwards, the bottom of the packaging hopper is inserted into the top of the packaging bottles, an output shaft of the third motor is matched with a third commutator to drive a third driving rod to rotate, the third driving rod is matched with a third rotating piece to drive an adjusting screw rod and a third pull rod to rotate, and then two first bottle clamping arms and two second bottle clamping arms are driven to clamp and fix the tops of the packaging;

step two: the first commutator that two first motor output shaft cooperations correspond drives first actuating lever and rotates, first actuating lever cooperation first rotor plate drives the sluice gate with first pull rod and rotates, the granule gets into in the weighing hopper of below from the hopper, second motor output shaft cooperation second commutator drives the second actuating lever and rotates, second actuating lever cooperation second rotor plate, the sluice gate rotates along the main shaft pole under the second pull rod drive, the granule gets into in the packing fill of below from the weighing hopper, finally get into in the packing bottle, first double-layered bottle arm after the packing, the double-layered bottle arm of second cancels the centre gripping to the packing bottle both sides, then telescopic cylinder piston rod shrink, the packing hopper is mentioned, accomplish packing bottle packing.

Technical Field

The invention relates to the technical field of garbage bag production, in particular to an environment-friendly garbage bag preparation material and a preparation method thereof.

Background

Along with the increasing living standard of people, the concept of garbage bag packaging treatment gradually enters the life of people in recent years. Compared with the traditional garbage disposal mode, the garbage bag processing avoids the garbage exposure and the spilling and leaking in the transportation, can effectively control the garbage to fall to the ground, reduce the flying dust in the air, eliminate the meat land of mosquitoes, flies and mice, reduce the spread of various germs, thoroughly solve the problems of easy blockage of garbage channels of residential buildings and the odor of the garbage after the garbage is rotten, is convenient for classifying and collecting the garbage, finally achieves the harmless, recycling and reduction processing of the garbage, and is increasingly favored by people.

Many consumers go to supermarkets to buy special garbage bags, however, the existing garbage bags are difficult to degrade within a short time after being discarded, and thus, the environment is polluted. Meanwhile, the existing garbage bags are usually made of granular materials before production, packaging needs to be carried out in the production process of the granules, the granules are rolled down when packaging is easy to occur when packaging bottles are conveyed on a conveyor belt by existing packaging equipment, and meanwhile the packaging efficiency of the packaging equipment is not high.

Disclosure of Invention

The invention aims to provide an environment-friendly garbage bag preparation material and a preparation method thereof, and solves the following technical problems: (1) through the addition of the deodorant composite material, the prepared garbage bag does not generate odor in the degradation process, through the addition of EVA, the prepared garbage bag has the advantages of good buffering, shock resistance, heat insulation, moisture resistance, chemical corrosion resistance, bacteria resistance, water resistance and the like, is non-toxic and does not absorb water, the preparation process of the environment-friendly garbage bag preparation material is simple, and according to the experiment, the 7-day degradation degree of the 0.03mm degradable garbage bag prepared from the environment-friendly garbage bag preparation material is 10-13%, so that the technical problems that the garbage bag is not easy to degrade and the environment is easy to pollute in the prior art are solved; (2) granular environment-friendly garbage bag preparation materials are poured into a storage hopper of packaging equipment, granules respectively enter two feeding hoppers, packaging bottles are placed in positioning grooves in a conveying belt, a fourth motor is started, an output shaft of the fourth motor is matched with a fourth commutator to drive one of driving rollers to rotate, the two driving rollers drive the conveying belt to rotate, the packaging bottles are conveyed towards a packaging frame, after two adjacent packaging bottles are conveyed to the lower side of the packaging hopper, the conveying belt stops conveying, a piston rod of a telescopic cylinder pushes the packaging hopper downwards, the bottom of the packaging hopper is inserted into the top of the packaging bottle, an output shaft of the third motor is matched with a third commutator to drive a third driving rod to rotate, the third driving rod is matched with a third rotating piece to drive an adjusting screw rod and a third pull rod to rotate so as to drive two first bottle clamping arms and two second bottle clamping arms to clamp and fix the top of the packaging bottle, and the positioning grooves in the conveying, the packaging equipment can convey two rows of packaging bottles simultaneously, stable conveying of the packaging bottles is guaranteed, and due to the arrangement of the convex strips and the annular grooves, the situation that packaging bottles cannot be aligned with a packaging hopper due to deviation when conveyed by a conveying belt is avoided; (3) the first commutator that corresponds through two first motor output shaft cooperations drives the first actuating lever and rotates, first actuating lever cooperation first rotor plate drives the sluice gate with first pull rod and rotates, the granule gets into in the weighing hopper of below from the hopper, second motor output shaft cooperation second commutator drives the second actuating lever and rotates, second actuating lever cooperation second rotor plate, the sluice gate rotates along the main shaft pole under the second pull rod drive, the granule gets into in the packing fill of below from the weighing hopper, finally get into in the packing bottle, first double-layered bottle arm after the packing, the double-layered bottle arm of second cancels the centre gripping to packing bottle both sides, then telescopic cylinder piston rod shrink, the packing hopper is mentioned, accomplish the packing bottle packing, solve the packing efficiency technical problem of equipment to the granule among the prior art.

The purpose of the invention can be realized by the following technical scheme:

an environment-friendly garbage bag preparation material is prepared from the following raw materials in parts by weight: 20-70 parts of polyethylene, 10-30 parts of EVA (ethylene vinyl acetate), 3-7 parts of filler, 2.5-4.5 parts of odorless foaming agent, 0.3-0.7 part of odorless coupling agent, 0.5-1.5 parts of zinc oxide powder, 0.1-0.5 part of stearic acid, 0.5-1 part of plasticizer, 0.5-1.2 parts of preservative, 0.22-0.28 part of free radical inhibitor, 0.22-0.28 part of flexibilizer, 0.5-2 parts of color master batch and 1.5-3.5 parts of deodorant composite material;

the environment-friendly garbage bag preparation material is prepared by the following steps:

the method comprises the following steps: weighing polyethylene and EVA, adding the polyethylene and the EVA into a reactor, heating and melting, adding a filler, an odorless foaming agent, an odorless coupling agent, zinc oxide powder, stearic acid, a plasticizer, a preservative, a free radical resistant agent and a toughening agent into the reactor, and mixing and stirring to obtain a premix;

step two: keeping the premix in a molten state, weighing the color master batch and the deodorant composite material, adding the color master batch and the deodorant composite material into a reactor, and mixing and stirring to obtain a mixture;

step three: putting the mixture into a screw extruder, and cooling after extrusion to obtain a granular environment-friendly garbage bag preparation material;

step four: granular environment-friendly garbage bag preparation materials are poured into storage hoppers of packaging equipment, granules respectively enter two feeding hoppers, packaging bottles are placed in positioning grooves in a conveying belt, a fourth motor is started, an output shaft of the fourth motor is matched with a fourth commutator to drive one of driving rollers to rotate, the two driving rollers drive the conveying belt to rotate, the packaging bottles are conveyed towards a packaging frame, after two adjacent packaging bottles are conveyed to the lower part of the packaging hopper, the conveying belt stops conveying, a piston rod of a telescopic cylinder pushes the packaging hopper downwards, the bottom of the packaging hopper is inserted into the top of the packaging bottles, an output shaft of the third motor is matched with a third commutator to drive a third driving rod to rotate, the third driving rod is matched with a third rotating sheet to drive an adjusting screw rod and a third pull rod to rotate so as to drive two first bottle clamping arms and two second bottle clamping arms to clamp and fix the tops of the packaging bottles, the two first motor output shafts are matched with corresponding first commutators to drive the first, the first driving rod is matched with the first rotating sheet and the first pull rod to drive the upper hopper door to rotate, particles enter the weighing hopper below the feeding hopper from the feeding hopper, the second motor output shaft is matched with the second commutator to drive the second driving rod to rotate, the second driving rod is matched with the second rotating sheet and drives the lower hopper door to rotate along the main shaft rod, the particles enter the packaging hopper below the weighing hopper from the weighing hopper and finally enter the packaging bottles, after packaging, the first bottle clamping arm and the second bottle clamping arm cancel clamping on two sides of the packaging bottles, then the telescopic cylinder piston rod is contracted, the packaging hopper is lifted to finish packaging bottles, packaging equipment can simultaneously convey two rows of packaging bottles through the arrangement of the positioning grooves on the conveying belt, stable conveying of the packaging bottles is ensured, and the situation that the packaging bottles cannot be aligned with the packaging hopper due to deviation during conveying of the conveying belt can not occur through the arrangement of the convex strips and the annular grooves, through the design of the packing fill of liftable, the packing of being convenient for fill directly to packing bottle packing granule, through the design of first double-layered bottle arm and second double-layered bottle arm, both sides are by the centre gripping when making this packing bottle packing, make the packing bottle bottleneck aim at the packing fill bottom, thereby avoid the condition that the granule that leads to the fact rolls because rocking in the packaging process falls, make equipment for packing carry out quantitative weighing package to the granule, satisfy simultaneously to two packing bottle packagine, pack efficiently.

Furthermore, the filler adopts talcum powder, the odorless foaming agent adopts a sulfonyl hydrazine compound, the odorless coupling agent adopts a titanate coupling agent, the plasticizer adopts di (2-ethylhexyl) phthalate, the preservative is selected from rosin or aloe gel, the anti-free radical agent is glycyrrhetinic acid, and the toughening agent is poly (ethylene glycol succinate).

Further, the deodorant composite material is a mixture containing zinc acetate, a negative ion material, a phosphate antibacterial agent, a silicate antibacterial agent, a zeolite antibacterial agent, an oxide antibacterial agent and a rare earth activated inorganic antibacterial agent, the particle size of the deodorant composite material is 20 nanometers to 1.5 micrometers, the negative ion material is a rare earth-containing mineral composite material, the rare earth is a composite oxide of one or more of cerium, neodymium and lanthanum, and the mineral composite material is a composition of tourmaline, quartz and kaolin.

Further, in the third step, the temperature of the first zone of the screw extruder is 250-.

Further, the mixing and stirring time of the reactor in the step one is 20-30min, the stirring temperature is 50-70 ℃, and the stirring speed is 1000-.

Further, the mixing and stirring time of the reactor in the step two is 10-15min, the stirring temperature is 45-60 ℃, and the stirring speed is 800-1000 r/min.

The invention has the beneficial effects that:

(1) according to the environment-friendly garbage bag preparation material and the preparation method thereof, the prepared garbage bag does not generate odor in the degradation process due to the addition of the deodorization composite material, the prepared garbage bag has the advantages of good buffering, shock resistance, heat insulation, moisture resistance, chemical corrosion resistance, bacteria resistance, water resistance and the like due to the addition of EVA, and is non-toxic and non-absorbent, the preparation process of the environment-friendly garbage bag preparation material is simple, the 7-day degradation degree of a 0.03mm degradable garbage bag prepared from the environment-friendly garbage bag preparation material is 10-13% according to the experimental test, and the degradation time is fast;

(2) granular environment-friendly garbage bag preparation materials are poured into a storage hopper of packaging equipment, granules respectively enter two feeding hoppers, packaging bottles are placed in positioning grooves in a conveying belt, a fourth motor is started, an output shaft of the fourth motor is matched with a fourth commutator to drive one of driving rollers to rotate, the two driving rollers drive the conveying belt to rotate, the packaging bottles are conveyed towards a packaging frame, after two adjacent packaging bottles are conveyed to the lower part of the packaging hopper, the conveying belt stops conveying, a piston rod of a telescopic cylinder pushes the packaging hopper downwards, the bottom of the packaging hopper is inserted into the top of the packaging bottles, an output shaft of the third motor is matched with a third commutator to drive a third driving rod to rotate, the third driving rod is matched with a third rotating piece to drive an adjusting screw rod and a third pull rod to rotate, and then two first bottle clamping arms and two second bottle clamping arms are driven to clamp and fix the tops of the packaging bottles, and the positioning grooves in, the packaging equipment can convey two rows of packaging bottles simultaneously, stable conveying of the packaging bottles is guaranteed, due to the arrangement of the convex strips and the annular grooves, the situation that the packaging bottles cannot be aligned with the packaging hopper due to deviation when conveyed by the conveying belt is avoided, the packaging hopper can conveniently and directly package particles for the packaging bottles through the design of the liftable packaging hopper, two sides of the packaging bottles are clamped during packaging through the design of the first bottle clamping arm and the second bottle clamping arm, the bottle mouths of the packaging bottles are aligned with the bottoms of the packaging hoppers, and therefore the situation that the particles roll off due to shaking in the packaging process is avoided;

(3) the first commutator that two first motor output shaft cooperations correspond drives first actuating lever and rotates, first actuating lever cooperation first rotor plate drives the sluice gate with first pull rod and rotates, the granule gets into in the weighing hopper of below from the magazine, second motor output shaft cooperation second commutator drives the second actuating lever and rotates, second actuating lever cooperation second rotor plate, the sluice gate rotates along the main shaft pole under the second pull rod drive, the granule gets into in the packing fill of below from the weighing hopper, finally get into in the packing bottle, first double-layered bottle arm after the packing, the centre gripping of packing bottle both sides is cancelled to second double-layered bottle arm, then telescopic cylinder piston rod shrink, the packing hopper is mentioned, complete packing bottle packing, through above structural setting, make equipment for the packing can carry out quantitative weighing package to the granule, satisfy simultaneously to two packing bottle packagine, packing efficiency is high.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic view of the construction of the packaging apparatus of the present invention;

FIG. 2 is a front view of the packing frame of the present invention;

FIG. 3 is an internal structural view of the packaging holder of the present invention;

FIG. 4 is an internal structural view of the carriage of the present invention;

FIG. 5 is a schematic view of the construction of the conveyor belt of the present invention;

FIG. 6 is a schematic view of the construction of the drive roller of the present invention;

FIG. 7 is a schematic structural view of a hopper of the present invention;

FIG. 8 is a schematic view of the construction of the weighing hopper of the present invention;

fig. 9 is a side view of the bucket of the present invention.

In the figure: 1. a packaging frame; 2. packaging frames; 3. a storage hopper; 4. a carriage; 6. a feeding hopper; 7. an upper hopper door; 8. a first pull rod; 9. a first rotating piece; 10. a first drive lever; 11. a first commutator; 12. a first motor; 13. a weighing hopper; 14. a second drive lever; 15. a second rotating piece; 16. a main shaft rod; 161. a fixed seat; 17. a second pull rod; 18. a hopper door; 19. a second commutator; 20. a second motor; 21. packaging the bucket; 22. a bellows; 23. positioning angle iron; 24. a first bottle clamping arm; 25. a second bottle clamping arm; 26. adjusting the screw rod; 27. a third pull rod; 28. a third rotating piece; 29. a third drive lever; 30. a third commutator; 31. a third motor; 32. positioning blocks; 33. a clamping seat; 34. a telescopic cylinder; 35. a conveyor belt; 36. positioning a groove; 37. a convex strip; 38. a drive roller; 39. an annular groove; 40. a fourth commutator; 41. and a fourth motor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Please refer to FIGS. 1-9