CN108104251B

CN108104251B - HDPE filter pad and manufacturing method thereof

Info

Publication number: CN108104251B
Application number: CN201810073680.8A
Authority: CN
Inventors: 范佳敏
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-01-25
Filing date: 2018-01-25
Publication date: 2024-03-29
Anticipated expiration: 2038-01-25
Also published as: CN108104251A

Abstract

The invention relates to a filter pad with good filtering effect, convenient assembly and excellent bearing capacity, which can effectively reduce the storage capacity, and comprises a unit plate, wherein the unit plate is of a rectangular structure, the unit plate comprises a surface layer, a middle layer and a bottom layer, the surface layer, the middle layer and the bottom layer are of an integrated structure, the middle layer comprises warp strips and weft strips, the warp strips and the weft strips are mutually perpendicular to form a grid structure of the middle layer, groove panels on the surface layer and groove bottom plates on the bottom layer are arranged in parallel and alternately, the HDPE filter pad can be used in engineering construction such as sponge cities, parking lots, building roof gardens, pipe galleries, rigid landfill sites and the like, the bearing capacity of the HDPE filter pad can reach 50-100 tons/square meter, the filter pad can be used for replacing the existing broken stone or pebble guide layer, the occupied space can be reduced, the guide and the bearing capacity and the filtering effect can be improved, and meanwhile, the good expansibility and applicability of the filter pad can also enable the filter pad to meet the requirements of multiple environments.

Description

HDPE filter pad and manufacturing method thereof

Technical Field

The invention relates to an HDPE filter pad and a manufacturing method thereof.

Background

Along with the social development, more and more engineering construction projects are generated, the link of drainage filtration in the engineering projects is very important, the traditional drainage filtration structure is realized by adopting a gravel layer, a traditional PE filter pad and other structures, but the gravel layer structure is loose, and the applicability of the traditional PE filter pad is greatly restricted due to the factors of large weight, large occupied storage capacity, high price and the like, and the traditional PE filter pad has the defects of poor bearing capacity and poor drainage effect, and also influences the use effect of the traditional PE filter pad, so that the traditional PE filter pad is used as an infrastructure in the engineering projects, and the requirement for improving the performance of the traditional PE filter pad is urgent.

Meanwhile, due to the promotion of urban construction, urban natural ecology is also subjected to serious unbalance, urban pavement is hardened, waterproof materials are paved everywhere, not only is heavy urban waterlogging caused by heavy rain, but also rainwater cannot well enter an urban underground circulation system when a small amount of rainfall occurs, so that natural infiltration of the rainwater is enhanced, and the infiltration is placed in the first place. The concept of a sponge city is generated, and the sponge city has good elasticity in the aspects of adapting to environmental changes, responding to natural disasters caused by rainwater and the like, and the international general term is low-influence development rainwater system construction. Its main functions are to make water absorb, store, permeate and purify when raining, and to release and use the stored water when needed.

According to different regional environments, different rainwater utilization links can be arranged, and the regional environments can be generally divided into two categories, namely a living region and an industrial region according to the current situation of a city.

Whether in a water-rich area or a water-deficient area, the utilization of rainwater resources is enhanced, flood disasters can be relieved, the collected water resources can be utilized, and devices capable of effectively utilizing rainwater, such as rainwater on a parking lot, can be used for washing vehicles after being collected and purified, are paved in parking lots of various communities in a city, comprehensive pipe galleries of the city and the like. In addition, when the existing building roof encounters rainy weather, accumulated water is always left through a pipeline to reach the bottom surface so as to keep the roof dry, the total area of the urban building is larger than the total area of the city, the idle roof area is considerable, and the existing roof causes space waste to a certain extent, so that a device capable of effectively utilizing urban rainwater and paving on the roof is needed.

In the industrial area, most of the guide-discharge layers of the existing refuse landfill are made of broken stone or cobble, the broken stone of the guide-discharge layers is uneven in size, gaps among the broken stone are small, when liquid in the refuse flows through the broken stone, the filtering effect of the small gap is poor, accumulation of the liquid is easy to cause, the liquid in the landfill is not easy to discharge, and due to the fact that the broken stone is independent, the broken stone is different in size, uneven conditions with different degrees can occur when the guide-discharge layers are paved, therefore when a heavy object is pressed on the guide-discharge layers, the guide-discharge layers are easy to bear uneven stress, the lower geomembrane can be damaged, the liquid is further leaked from the guide-discharge layers to enter the impermeable membrane, and soil is polluted after the impermeable membrane is leaked.

The layer thickness of the guide-drainage layer of the traditional refuse landfill reaches more than 50cm, a large amount of space of the landfill is occupied, the utilization rate of the landfill is reduced, the weight of the garbage born by broken stones or cobbles forming the guide-drainage layer is limited, the reduction of raw materials is also caused by limited exploitation of broken stones or cobbles in a quarry, the environment is easy to pollute in the exploitation process, the cost is high, the thickness of the guide-drainage layer needs to be increased if the bearing capacity of the inverted-drainage layer is increased, the corresponding manufacturing cost is increased, the device capable of replacing the traditional guide-drainage layer is urgently needed at present, the filtrate effect of the device is good, the paved guide-drainage layer is smooth, the stress is even, the bearing capacity is strong, and the occupied space is small.

Disclosure of Invention

In order to solve the problems, the HDPE filter pad disclosed by the invention has good filtering effect, is not easy to degrade, can effectively reduce the storage capacity and has excellent bearing capacity, and comprises a plurality of unit plates, wherein the unit plates are rectangular, each unit plate comprises a frame, a surface layer, an intermediate layer and a bottom layer, the intermediate layer comprises upright posts, warp strips and weft strips, the intermediate layer is formed into a grid structure by mutually perpendicular arrangement of the warp strips and the weft strips, the upright posts are arranged at the intersecting positions of the warp strips and the weft strips, the surface layer is composed of a plurality of groove surface plates, the groove surface plates are fixedly buckled on the top ends of the upright posts of the intermediate layer, the intersecting positions of the groove surface plates and the frame are in an angle, the groove surface plates are arranged in parallel, the groove surface plates are fixedly buckled on the bottom ends of the upright posts, the intersecting positions of the groove surface plates and the frame are in an angle, the groove surface plates are arranged in an equidistant parallel, and the groove surface plates are alternately arranged in parallel.

Further, the warp and weft yarn winding machine also comprises a diversion port, wherein the diversion port is respectively arranged on the warp and weft yarns, and the diversion port enables adjacent spaces to be communicated.

Further, the channel panel and the channel bottom are respectively arranged on the warp strip in parallel.

Further, the groove panel and the groove bottom plate are fixedly connected with the upright post, the warp strips and the weft strips at the center line position of the groove bottom of the groove.

Further, the upright posts are arranged with the diagonal line of the middle layer as the axis symmetry.

Furthermore, the unit plates are symmetrically arranged into HDPE filter pads by taking the edges of the frame as symmetry axes.

Further, it still includes fixed ear, fixed ear evenly sets up on the arbitrary both sides of HDPE filter cushion, and fixed ear's side and stand integrated into one piece, fixed ear's bottom surface and the bottom surface parallel and level of bottom.

Further, a method of making an HDPE filter pad comprising the steps of:

step one: compounding, namely adding 65-75 parts by weight of high-density polyethylene particles, 15-25 parts by weight of polypropylene particles, 2.2-3.5 parts by weight of carbon black particles and 5-8 parts by weight of modifier into a charging port of a charging barrel of an injection molding machine;

step two: plasticizing and melting glue, wherein a special screw in a charging barrel of the injection molding machine is driven by a motor to rotate, a heating ring is arranged outside the charging barrel, the material in the first step is driven by the screw to be pushed to a mold clamping device, the plasticizing and melting glue of the material are completed under the double actions of heating of an external electric heating ring and shearing of the screw, the electric heating ring is divided into four sections for heating the material, the temperature of a first stage to a third stage is set to be 210-215 ℃, and the temperature of a fourth stage is set to be 180-185 ℃;

step three: injection molding, namely after the melt adhesive is finished, injecting the melt adhesive into a cavity of a mold clamping device, dividing the injection into four sections, setting the injection pressure to be 4-7Mpa, setting the injection speed to be 40-60% of the maximum injection speed of an injection molding machine, and cooling and molding after pressure maintaining for 2-5 s;

step four: and demolding, opening the mold, and pushing the ejector pin of the mold against the upright post of the HDPE filter pad to eject the HDPE filter pad out of the cavity of the mold, thereby obtaining the HDPE filter pad.

Further, the HDPE filter pad is made of 60-80 parts by weight of high-density polyethylene particles, 15-25 parts by weight of polypropylene particles and 2.2-3.5 parts by weight of carbon black particles.

By implementing the invention, the traditional PE filter pad and the broken stone drainage layer can be replaced, and the filter pad is pavedThe filter pad is smooth, evenly stressed and strong in bearing capacity, the square meter of the filter pad can bear 50 tons to 100 tons of pressure, and in addition, the test report from the national chemical building material test center also shows that the filter pad has the thickness of 18.15mm, the carbon black content of 2.2 percent and the compression strength of 4.52 x 10 ³ kpa, longitudinal water conductivity 9.22 x 10 ^-3 m ² And the thickness of the filter pad is 18.15mm and is far smaller than 50cm, so that the space is saved, the water filtering effect is better, the filter pad is used for paving a rigid landfill, the cost of the landfill can be saved, the utilization rate of the landfill is improved, the filter pad is made of materials which ensure that the filter pad cannot be corroded by exuded liquid in garbage, the filter pad has good ageing resistance, and the filter pad can be used for communities in cities, parks and two sides of roads, so that urban waterlogging is reduced.

Drawings

FIG. 1 is a front view of a cell plate of the present invention;

FIG. 2 is a side view of a cell plate of the present invention;

FIG. 3 is a perspective view of the HDPE filter mat of the present invention;

FIG. 4 is a schematic diagram of the HDPE filter mat of example 1;

FIG. 5 is a schematic view showing the structure of the HDPE filter mat of example 2;

fig. 6 is an enlarged partial schematic view of the HDPE pad of example 2.

Legend: 1. the U-shaped plate comprises a unit plate, 10, a frame, 11, a surface layer, 12, a middle layer, 13, a bottom layer, 111, a groove panel, 121, upright posts, 122, warp strips, 123, weft strips, 131, a groove bottom plate, 2, a guide port and 3, and a fixing lug.

Detailed Description

The invention is further illustrated, but is not limited to, the following examples.

Example 1

As shown in fig. 1, 2 and 3, the invention provides an HDPE filter pad, which comprises a unit plate 1, wherein the unit plate 1 is rectangular, the rectangular structure is simple and convenient to expand, the working efficiency is improved, the unit plate 1 comprises a frame 10, a surface layer 11, a middle layer 12 and a bottom layer 13, the surface layer 11, the middle layer 12 and the bottom layer 13 are integrally formed, the integrally formed three layers are firm in structure, the layers are tightly and reliably connected, the layers are not easy to tear like an adhesion structure when bearing pressure, the frame 10 is arranged on the edge of the HDPE filter pad corresponding to the middle layer 12, the frame 10 strengthens the stability of the middle layer 12, and the phenomenon that the edge of the middle layer 12 is torn and deformed is avoided when the filter pad bears gravity, so that the filter pad is more firm and durable.

The middle layer 12 comprises upright posts 121, warp strips 122 and weft strips 123, the middle layer 12 is formed into a grid structure by mutually perpendicular arrangement of the warp strips 122 and the weft strips 123, preferably, the mesh opening of the grid structure is 1.5-2cm, when a weight containing liquid is pressed on the HDPE filter pad, the liquid flows out from the mesh opening of the grid structure, the warp strips 122 and the weft strips 123 of the grid structure are arranged in parallel, and the warp strips 122 and the weft strips 123 are arranged in parallel, so that the material consumption in unit area is reduced, the cost is saved, and the bearing capacity of the HDPE filter pad is not influenced.

The upright 121 is arranged at the intersection of the warp strips 122 and the weft strips 123, the column body of the upright 121 is fixedly connected with the warp strips 122 and the weft strips 123 respectively, the upright 121 is cylindrical, the diameter of the cylinder ranges from 0.5cm to 1cm, preferably, the diameter of the upright 121 is 0.5cm, one end of the upright 121 is fixedly connected with the groove face plate 111 and the groove bottom plate 131, preferably, the groove face plate 111 and the groove bottom plate 131 are fixedly connected with the upright 121, the warp strips 122 and the weft strips 123 at the center line position of the groove bottom, so that the stability of the upright 121 and the warp strips 122 and the weft strips 123 is enhanced, the end face of the other end of the upright 121 is flush with the surface layer or the bottom layer of the HDPE filter pad, when a heavy object is pressed on the HDPE filter pad, the force born by the groove face plate 111 of the HDPE filter pad is dispersed on the warp strips 122 and the weft strips 123, meanwhile, the upright 121 is contacted with the heavy object to disperse partial pressure of the heavy object, and the pressure is conducted to the groove bottom plate 131 of the bottom layer, so that the bearing capacity of the filter pad is improved.

In this embodiment, the positions of the columns 121 are adapted to the mold, and since the groove panels 111 of the surface layer 11 and the groove bottom panels 131 of the bottom layer 13 are alternately arranged in parallel, preferably, the columns 121 are symmetrically arranged with the diagonal line of the middle layer 12 as an axis, and the columns 121 are not easily damaged during demolding, thereby ensuring smooth demolding. Specifically, when the HDPE filter pad is formed, the surface layer 11, the middle layer 12 and the bottom layer 13 are integrally formed, the ejector pins are arranged at the corresponding positions of the upright post 121 on the die, and when the die is removed, the ejector pins are ejected onto the upright post 121, and an external force is applied, so that the die and the HDPE filter pad are removed, and the die and the HDPE filter pad are separated.

The top layer 11 is composed of a plurality of groove panels 111, the groove panels 111 are fixedly fastened on the top ends of the upright posts 121 of the middle layer 12, the intersecting positions of the groove panels 111 and the frame 10 are in an angle, the groove panels 111 are equally spaced and arranged in parallel, the bottom layer 13 is composed of a plurality of groove bottom plates 131, the groove bottom plates 131 are fixedly fastened on the bottom ends of the upright posts 121, the intersecting positions of the groove bottom plates 131 and the frame 10 are in an angle, the groove bottom plates 131 are equally spaced and arranged in parallel, and the groove panels 111 and the groove bottom plates 131 are alternately arranged in parallel.

Preferably, the trough panel 111 is disposed on the surface layer 11 or the trough bottom plate 131 is disposed on the bottom layer 13, and the trough panel 111 or the trough bottom plate 131 is disposed in parallel at two positions spaced by two meshes, so that a gap is left between the trough panel 111 or the trough bottom plate 131, thereby enabling the surface layer 11 and the bottom layer 13 to filter water, and the grid structure of the middle layer 12 is added, so that the unit plate 1 has a function of filtering water as a whole, and the other purpose is that the surface layer 11 and the bottom layer 13 respectively formed by the trough panel 111 or the trough bottom plate 131 still have a bearing capacity, and the weight is dispersed by the grid structure so as not to damage the trough panel 111 or the trough bottom plate 131.

The groove panels 111 on the surface layer 11 and the groove bottom panels 131 on the bottom layer 13 are alternately arranged in parallel, specifically, a plurality of groove panels 111 are arranged at intervals on the surface layer 11, while a plurality of groove bottom panels 131 of the bottom layer 13 are arranged at positions spaced by the groove panels 111 on the surface layer 11, the groove panels 111 and the groove bottom panels 131 are alternately arranged in parallel, preferably, in unit area, the horizontal spacing between the groove panels 111 of the surface layer 11 and the groove bottom panels 131 of the bottom layer 13 is smaller than the horizontal spacing between the groove panels 111 of the surface layer 11, preferably, the horizontal spacing between the groove panels 111 of the surface layer 11 and the groove bottom panels 131 of the bottom layer 13 is one grid, and the horizontal spacing between the groove panels 111 of the surface layer 11 is two grids, so that when the groove panels 111 of the surface layer 11 are subjected to the pressure of a heavy object, the force is transmitted to the middle layer 12 and then to the groove bottom panels 131 on the bottom layer 13, the smaller the horizontal spacing is, the horizontal moment arm is smaller, the larger the bending resistance is the stronger the unit panel 1 can bear the pressure, and the effect that the groove panels 111 can bear the pressure alternately arranged after the groove panels 1.

The groove panel 111 and the groove bottom plate 131 are of regular structure, the groove panel 111 and the groove bottom plate 131 are arranged on the warp strip 122 in parallel, the groove panel 111 and the groove bottom plate 131 are connected with the weft strip 123 through fixed connection points, the groove panel 111 and the groove bottom plate 131 are prevented from being arranged on the hollow part of the grid, so that the situation that the groove panel 111 and the groove bottom plate 131 are crushed by a heavy object is avoided, when the groove panel 111 is contacted with the heavy object to bear pressure, the pressure directly acts on the warp strip 122 through the groove panel 111, so that the pressure born by the groove panel 111 is dispersed on the warp strip 122, preferably, the groove panel 111 and the groove bottom plate 131 are fixedly connected with the warp strip 122 at the groove bottom center line position of the groove, the connection points are distributed on two sides of the groove panel 111 and the groove bottom plate 131, when the groove panel 111 bears the pressure of the heavy object, one part of the pressure is directly acted on the warp strip 122, the other part of the pressure is evenly distributed on the weft strip 123 on two sides of the groove panel 111 through the connection points of the groove panel 111 and the weft strip 123, so that the bending force is dispersed, the bending force is acted on the warp strip 122 and the weft strip 123, the whole force is not concentrated on the warp strip 122, the whole is not combined with the groove panel 111, and the whole strength is increased, and the integral strength is increased, and the strength is increased. Grooves are formed in the trough panel 111 and the trough bottom 131, so that the material consumption is reduced, and the cost is saved. Preferably, anti-slip grooves are provided on the surfaces of the trough panel 111 and the trough bottom plate 131 so as to prevent the weight from easily slipping when in contact with the trough panel 111 and to prevent the trough bottom plate 131 from easily slipping when in contact with the ground.

As shown in fig. 4, the unit plates 1 are symmetrically arranged into HDPE filter pads by taking the sides of the frame 10 as symmetry axes, specifically, the groove surface plates 111 and the groove bottom plates 131 form a inverted-v-shaped structure on 2 adjacent unit plates 1 in the HDPE filter pads, and the inverted-v-shaped structure and the sides of the unit plates 1 form an isosceles right triangle, so that the bearing capacity of the HDPE filter pads is further enhanced.

As shown in fig. 4, the HDPE filter pad further includes a fixing lug 3, the fixing lugs 3 are uniformly disposed on any two sides of the HDPE filter pad, the purpose of the fixing lugs 3 is to connect the filter pads together through the fixing lugs 3 when the filter pad is laid, so as to play a role of fixing connection, the side edges of the fixing lugs 3 are integrally formed with the upright posts 123, the fixing lugs 3 are more firmly connected with the upright posts 123 through the integral forming, the fixing lugs 3 are durable, the bottom surfaces of the fixing lugs 3 are flush with the bottom surfaces of the bottom layers 13, and when the filter pad is laid, the fixing lugs 3 are fastened with the upright posts 123 at the corresponding positions of the fixing lugs 3, so that the whole surface of the connected filter pad is flat, and can bear larger pressure, thereby solving the problems of easy dislocation and easy occurrence of gaps between the filter pads.

In this embodiment, the middle layer 12 of the HDPE filter pad is a grid structure, the surface layer 11 is provided with the groove panel 111 to increase the contact area between the heavy object and the HDPE filter pad when the heavy object contacts the HDPE filter pad, and the bottom layer 13 is provided with the groove bottom plate 131 to prevent the middle layer 12 from sliding easily when directly contacting the ground, and to increase the contact area between the middle layer 12 and the ground.

When the HDPE filter cushion is used, when the HDPE filter cushion bears the pressure of a heavy object, the heavy object acts on the groove panel 111 of the surface layer 11 of the filter cushion, the groove panel 111 forms the whole surface of the surface layer 11 to bear the pressure, the groove panel 111 transmits the force to the grid structure of the middle layer 12 through the strips 122, the grid structure is stable and can bear large pressure, the force on the groove panel 111 is dispersed to the whole middle layer 12, the pressure concentration is avoided, the middle layer 12 can bear large pressure through the strips 122, the pressure is transmitted to the groove bottom plate 131 of the bottom layer 13 through the middle layer 12, the whole bottom surface of the bottom layer 13 formed by the groove bottom plate 131 bears the pressure, in addition, the upright post 121 also disperses part of the pressure of the heavy object, and the HDPE filter cushion can bear more than 50 tons per square meter by adopting the structure of the HDPE filter cushion in the embodiment.

Now, the landfill site will be described as an example, and the HDPE pad of the present embodiment is not limited to use in a rigid landfill site. When the HDPE filter pad is used in a refuse landfill, the HDPE filter pad is arranged on the bottom and the side wall of the refuse landfill, the filter pad is closely paved at the bottom and is inserted into the fixed lug 3 through the upright post 121 to be fixedly connected together, the filter pad on the side wall is also connected with the filter pad at the bottom through the fixed lug 3, the filter pad on the side wall and the filter pad at the bottom can be connected together by a certain gap between the upright post 121 and the fixed lug 3, a certain angle can be formed between the filter pad and the filter pad during connection, the filter pad on the side wall and the filter pad at the bottom can be connected together, and the HDPE filter pad is assembled to form the rigid refuse landfill.

Example 2

As shown in fig. 5 and 6, the technical solution of this embodiment may refer to embodiment 1, but the difference with embodiment 1 is that the filter pad in this embodiment further includes a flow guiding port 2, the flow guiding ports 2 are respectively disposed on the warp strips 122 and the weft strips 123, the flow guiding ports 2 enable adjacent spaces to be communicated, and the space communication adjacent to the flow guiding ports 2 can enable the inter-layer grid structures to be communicated, so that the flow guiding of the filter pad is smoother, and the effusion is avoided.

Specifically, the thickness of the filter pad of the invention is 18.15mm, the filter pad in the embodiment 1 is not provided with a diversion port, when the HDPE filter pad is paved on an urban road, rainwater with a certain thickness is accumulated on the road surface, the rainwater with a thickness greater than 18.15mm flows into a groundwater pipeline, and the thickness of the HDPE filter pad effusion is the thickness of the HDPE filter pad. Further, if the HDPE filter pad is laid on the water permeable material, the water stored in the HDPE filter pad naturally permeates into the ground from the grid, so that the volume of the HDPE filter pad is small.

Further, in this embodiment, the channel strip 122 is provided with the drainage port 2, under the same environmental condition, that is, under the condition that the HDPE filter pad stores water of 18.15mm, the drainage port 2 is provided, the water in the HDPE filter pad can be gathered together along the drainage port 2, the gathered liquid volume is larger and easier to discharge, and through experiments, the drainage port 2 is provided with the drainage port 2, the liquid accumulation height of the HDPE filter pad is smaller than 0-4mm (the liquid accumulation is smaller as the liquid accumulation wall is lower), so that the drainage function of the HDPE filter pad is further improved.

Example 3

The present embodiment provides a method for manufacturing an HDPE filter pad, the method for manufacturing the HDPE filter pad in embodiments 1-2 is not limited to that provided in the present embodiment, and the method for manufacturing the HDPE filter pad disclosed in the present embodiment includes the steps of:

step one: compounding, namely adding 60-80 parts by weight of high-density polyethylene (HDPE) particles, 15-25 parts by weight of polypropylene (PP) particles and 2.2-3.5 parts by weight of carbon black particles into a charging hole of a charging barrel of an injection molding machine;

step three: injection molding, namely after the melt adhesive is finished, injecting the melt adhesive into a cavity of a mold clamping device, dividing the injection into four sections, setting the injection pressure to be 4-7Mpa, setting the injection speed to be 40-60% of the maximum injection speed, and cooling and molding after pressure maintaining for 2-5 s;

Preferably, the HDPE filter is made of 65-75 parts by weight of high-density polyethylene (HDPE) particles, 15-25 parts by weight of polypropylene (PP) particles, 2.2-3.5 parts by weight of carbon black particles and 5-8 parts by weight of modifier, and different modifiers such as ethylene propylene rubber (EPDM), POE plastic, TPE material and the like are selected according to the requirement, so as to adjust the compressive strength and the flexibility of the HDPE filter.

Example 4

The HDPE filter of this example is made of 70 parts by weight of high-density polyethylene (HDPE) particles, 20 parts by weight of polypropylene (PP) particles, 2.2 parts by weight of carbon black particles and 7.8 parts of modifier. The HDPE filter mat prepared by the above components has a thickness of 18.15mm, and the method for preparing the HDPE filter mat in this example refers to example 4, and the compression strength of the prepared HDPE filter mat is 4520kpa, and the longitudinal water conductivity is 9.22 x 10 ^-3 m ² /s。

Examples 5 to 6

The HDPE pads were produced by changing the proportions of the carbon black particles and the modifier in the material components used for producing the HDPE pads in examples 5 to 6 in the same parts by weight as in example 4, changing the temperatures of plasticizing and melt-bonding, and changing the pressure of injection molding, and the compressive strength of the HDPE pads produced by the other production methods described in example 3 are shown in table 1.

Comparative examples 1 to 5

The HDPE pads of comparative examples 1 to 5 were produced by changing the proportions of the carbon black particles and the modifier in parts by weight, the plasticizing and melt temperatures, and the injection molding pressures of the high density polyethylene and polypropylene as in example 4, and the compressive strength of the HDPE pads produced by the other production methods described in example 3 were shown in table 1.

TABLE 1

It should be apparent that the foregoing embodiments of the present invention are merely illustrative of the present invention and not limiting, and that various other changes and modifications can be made by one skilled in the art based on the foregoing description, and it is not intended to be exhaustive of all embodiments, and all obvious changes and modifications that come within the spirit of the invention are desired to be protected.

Claims

1. An HDPE filter pad, characterized in that: it includes a plurality of unit boards (1), unit board (1) are rectangle form, unit board (1) includes frame (10), top layer (11), intermediate level (12) and bottom (13), intermediate level (12) are including stand (121), warp strip (122) and weft strip (123), intermediate level (12) are by warp strip (122) and weft strip (123) mutually perpendicular setting formation grid structure, stand (121) set up in crossing department of warp strip (122) and weft strip (123), top layer (11) are a plurality of groove panels (111) structure constitution, fixed knot of groove panels (111) is on stand (121) top of intermediate level (12), groove panels (111) are the angle with crossing department of frame (10), and equidistant and parallel arrangement between groove panels (111), bottom (13) are a plurality of groove bottom (131) structures constitution, fixed knot of groove panels (131) are on stand (121) bottom, and alternate groove panels (131) are the crossing department of angle with frame (122) and weft strip (123), and the interval between groove panels (131) and groove panels (131) are parallel arrangement between groove panels (131) and groove bottom (131) on the crossing department of frame (10) and parallel arrangement between groove panels (131) and parallel arrangement The warp strips (122) are fixedly connected with the weft strips (123), and the groove panels (111) or the groove bottom plates (131) are arranged in parallel at the positions of two meshes at intervals;

wherein the filter pad is a HDPE filter pad formed by mixing 65-75 parts by weight of high-density polyethylene (HDPE) particles, 15-25 parts by weight of polypropylene (PP) particles, 2.2-3.5 parts by weight of carbon black particles and 5-8 parts by weight of modifier, and sequentially carrying out plasticizing and melt adhesive effects at the temperature of 210-215 ℃ in the first stage to the third stage and 180-185 ℃ in the fourth stage, and then carrying out injection molding pressure of 4-7 Mp.

2. The HDPE filter pad of claim 1, wherein: the warp yarn weft yarn machine further comprises a diversion opening (2), wherein the diversion opening (2) is respectively arranged on the warp yarn (122) and the weft yarn (123), and the diversion opening (2) enables adjacent spaces to be communicated.

3. The HDPE filter pad of claim 1, wherein: the upright posts (121) are arranged axisymmetrically by taking the diagonal line of the middle layer (12).

4. A HDPE filter pad according to any one of claims 1-3, wherein: the unit plates (1) are symmetrically arranged into HDPE filter pads by taking the edges of the frames (10) as symmetry axes.

5. The HDPE filter pad of claim 4, wherein: the novel HDPE filter pad is characterized by further comprising fixing lugs (3), wherein the fixing lugs (3) are uniformly arranged on any two sides of the HDPE filter pad, the side edges of the fixing lugs (3) are integrally formed with the upright posts (121), and the bottom surfaces of the fixing lugs (3) are flush with the bottom surface of the bottom layer (13).

6. A method of making an HDPE filter pad as claimed in any one of claims 1, 2, 3 and 5, comprising the steps of: