Search

CN-121989536-A - Drainage plate adopting recycled plastic composite core plate and preparation method thereof

CN121989536ACN 121989536 ACN121989536 ACN 121989536ACN-121989536-A

Abstract

The invention discloses a drain board adopting a regenerated plastic composite core board and a preparation method thereof, and belongs to the technical field of drain boards. The drainage plate comprises a regenerated plastic composite core plate, a filter membrane, a reinforcing sleeve and a splicing structure. The core board takes regenerated polypropylene as a base material, enhances performance by adding glass fiber powder and compatilizer, and is provided with a trapezoid drainage channel to improve compression resistance and drainage stability. The filter membrane adopts regenerated polyester non-woven fabric and is mechanically engaged with the core plate through a needling composite process. The invention realizes the high-value utilization of waste plastics, obviously reduces the production cost, ensures excellent mechanical property and drainage stability, and is suitable for projects such as roadbeds, gardens, building foundation pits and the like.

Inventors

  • JI CHUANYIN
  • Fu Hengzuo

Assignees

  • 江苏三鼎软基材料有限公司

Dates

Publication Date
20260508
Application Date
20260305

Claims (10)

  1. 1. The drainage plate is characterized by comprising a regenerated plastic composite core plate, a filter membrane, a reinforcing sleeve and a splicing structure, wherein the regenerated plastic composite core plate is made of regenerated polypropylene serving as a base material and added with glass fiber powder, a compatilizer and an auxiliary additive, a drainage channel is formed in the regenerated plastic composite core plate, and U-shaped reinforcing sleeves are arranged at two ends of the regenerated plastic composite core plate.
  2. 2. The drain board adopting the regenerated plastic composite core board according to claim 1, wherein the components of the regenerated plastic composite core board comprise 75-80.5% of regenerated polypropylene, 15-20% of glass fiber powder, 3-5% of compatilizer, 1-2% of anti-aging agent and the balance of lubricant in percentage by mass.
  3. 3. The drain board adopting the regenerated plastic composite core board according to claim 2 is characterized in that the regenerated polypropylene is selected from particles obtained by recovering and crushing waste plastic trays or pipes, the purity is not less than 95%, the melt index is 2-5g/10min, the length of the glass fiber powder is 100-200 mu m, the compatilizer is maleic anhydride grafted polypropylene, the ageing inhibitor is hindered phenol ageing inhibitor, and the lubricant is calcium stearate.
  4. 4. A drainage board using a recycled plastic composite core board according to claim 1, wherein the drainage channels extend in the length direction of the core board, the upper bottom width is 8-12mm, the lower bottom width is 12-16mm, the height is 5-8mm, and the distance between adjacent channels is 15-20mm.
  5. 5. The drain board adopting the regenerated plastic composite core board according to claim 1, wherein the filter membrane is regenerated polyester non-woven fabric, the gram weight is 250-300g/m < 2 >, the filter membrane is embedded into the surface of the core board through a mechanical engagement structure formed by needle punching and compounding, the needle punching density is 100-120 needles/cm < 2 >, and the bonding strength is more than or equal to 1.5N/mm.
  6. 6. The drain board adopting the regenerated plastic composite core board according to claim 1, wherein the reinforcing sleeve is made of the same material as the regenerated plastic composite core board, the sleeve depth is 50-80mm, the reinforcing sleeve is fixed by hot-melt welding, and positioning holes with the interval of 50-60mm are arranged on the outer side of the reinforcing sleeve.
  7. 7. The drain board adopting the recycled plastic composite core board according to claim 1, wherein the splicing structure comprises splicing flanges and clamping grooves which are arranged on two sides of the core board, the width of the flanges is 10mm, and the depth of the clamping grooves is 5mm.
  8. 8. A process for preparing the drainage plate with the composite core plate of regenerated plastics includes such steps as breaking waste polypropylene plastics, washing, drying until its water content is less than 0.5%, proportionally mixing glass fibre powder, compatibilizer and additive to obtain auxiliary mixture, S2, mixing, smelting, loading the regenerated polypropylene particles and auxiliary mixture in twin-screw extruder, controlling feeding temp. at 160-170 deg.C, smelting at 180-190 deg.C, homogenizing at 175-185 deg.C, extruding out of head at 180-185 deg.C, rotating screw speed at 150-200r/min, extruding out of S3, cooling by cooling water tank, shaping, cutting, compounding with filter membrane, and compacting by press roller.
  9. 9. The method for manufacturing a drain board using a recycled plastic composite core board according to claim 8, further comprising step S5 of reinforcing end parts, wherein reinforcing sleeves are sleeved at two ends of the core board, and heat welding is performed for 3-5S at 180-190 ℃.
  10. 10. The method for manufacturing a drain board using a recycled plastic composite core board according to claim 8, wherein in the step S3, the mold temperature is controlled to be 180-185 ℃, the extrusion speed is controlled to be 0.5-1m/min, and the setting machine pressure is controlled to be 0.3-0.5MPa.

Description

Drainage plate adopting recycled plastic composite core plate and preparation method thereof Technical Field The invention relates to the technical field of drain boards, in particular to a drain board adopting a recycled plastic composite core board and a preparation method thereof. Background The plastic drainage plate is used as an indispensable drainage member in engineering construction, the demand amount is increased year by year, the core raw materials of the plastic drainage plate are mostly brand new plastics such as polyethylene, polypropylene and the like, the raw material cost is high, and the consumption of resources and the environmental pressure are increased due to the fact that the raw plastics are used in a large amount. Along with the tightening of environmental protection policies, recycling of the recycled plastic becomes an industry development trend, but when the existing recycled plastic is directly used for preparing the drain board core plate, the problems of poor mechanical property, insufficient ageing resistance, poor dimensional stability and the like exist, the drain board is easy to deform and break in the use process, and the engineering bearing and drainage requirements cannot be met. In the prior art, some schemes try to add filler in the recycled plastic to improve the performance, but the compatibility of the filler and the recycled plastic is poor, layering and agglomeration are easy to occur, the mechanical performance cannot be effectively improved, and the toughness and durability of the core plate can be reduced. Meanwhile, the drainage channels of the existing recycled plastic drainage plates are of rectangular and circular structures, the rectangular channels are poor in compression resistance stability and easy to deform and collapse under compression, the circular channels are high in water flow resistance, local stress concentration is easy to occur under the action of load, and the drainage stability is affected. In addition, the filter membrane of the existing regenerated plastic drain board is made of brand new polyester materials, the combination mode of the filter membrane and the core board is mainly simple adhesion, the adhesion strength is insufficient, the filter membrane is easy to fall off, the two ends of the core board lack of a specific reinforcing structure, edge damage is easy to occur in the laying process, and the whole service life is influenced. Meanwhile, most of the existing preparation processes are single extrusion molding, and the melting uniformity of the regenerated plastic particles is poor, so that the performance of the core plate is further fluctuated. Therefore, research and development of the regenerated plastic composite core board drainage board with excellent mechanical properties, stable drainage, low cost and environmental protection and sustainability and the preparation method thereof become urgent demands of industry. Disclosure of Invention The invention provides a drainage plate adopting a regenerated plastic composite core plate, which comprises a regenerated plastic composite core plate, a filter membrane, a reinforcing sleeve and a splicing structure, wherein the regenerated plastic composite core plate is made of regenerated polypropylene serving as a base material and added with glass fiber powder, a compatilizer and an auxiliary additive, a plurality of trapezoid drainage channels are uniformly formed in the regenerated plastic composite core plate, the filter membrane is combined to the surface of the regenerated plastic composite core plate in a needling composite mode, and U-shaped reinforcing sleeves are arranged at two ends of the regenerated plastic composite core plate. Further, the components of the regenerated plastic composite core plate comprise, by mass, 75-80.5% of regenerated polypropylene, 15-20% of glass fiber powder, 3-5% of compatilizer, 1-2% of anti-aging agent and the balance of lubricant. Further, the regenerated polypropylene is selected from particles obtained by recovering and crushing waste plastic trays or pipes, the purity is more than or equal to 95%, the melt index is 2-5g/10min, the length of the glass fiber powder is 100-200 mu m, the compatilizer is maleic anhydride grafted polypropylene, the anti-aging agent is hindered phenol anti-aging agent, and the lubricant is calcium stearate. Further, the drainage channels extend along the length direction of the core plate and are trapezoid, the width of the upper bottom of each drainage channel is 8-12mm, the width of the lower bottom of each drainage channel is 12-16mm, the height of each drainage channel is 5-8mm, and the distance between adjacent channels is 15-20mm. Further, the filter membrane is regenerated polyester non-woven fabric with the gram weight of 250-300g/m < 2 >, the filter membrane is embedded into the surface of the core plate through a mechanical engagement structure formed by needle punching and compounding, the need