Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of recycled pet/tpr alloy geogrid and its preparation method

A geogrid and alloy technology, applied in soil protection, infrastructure engineering, construction, etc., can solve problems such as poor solder joint performance, high elongation, and brittleness, and achieve improved welding performance and creep resistance Good, less brittle effect

Active Publication Date: 2017-08-01
上海自立塑料科技有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PET plastic welded geogrid has great application value due to the high strength and low creep of PET ties. Due to poor point performance and other problems, the characteristics of PET materials have not been fully developed and utilized, thus limiting its large-scale application

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of recycled pet/tpr alloy geogrid and its preparation method
  • A kind of recycled pet/tpr alloy geogrid and its preparation method
  • A kind of recycled pet/tpr alloy geogrid and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0045]

[0046] Such as figure 1 Shown, the preparation method of above-mentioned tie bar comprises the steps:

[0047] (1) Blend the dried recycled PET and TPR masterbatch in a certain ratio, and after mixing evenly, add it into a single-screw extruder to plasticize and extrude to obtain a parison;

[0048] (2) Put the parison in cold water and quench it to reduce the crystallinity and grain size. After removing the water stains on the surface, heat it in the drying room and carry out the first stretch at the same time. After the first stretch Immediately continue to heat and carry out the second stretching at the same time to obtain a molded object;

[0049] (3), placing the molded object in a drying room for heat setting to eliminate internal stress, embossing the surface of the heat-set molded object by an embossing wheel, and cooling (ie cold setting) to obtain a tie bar.

[0050] Wherein, in step (1), the TPR masterbatch needs to be prepared in advance, and its prepar...

Embodiment 1

[0066] Such as Figure 4 As shown, this embodiment provides a unidirectional stressed recycled PET / TPR alloy geogrid prepared according to the GDZ80 specification, which includes several warp and weft tendons, and several warp The ties are arranged in parallel, the arrangement direction of the weft ties is perpendicular to the arrangement direction of the warp ties, and each weft ties are alternately interspersed with the adjacent warp ties in their own length direction , the interlaced points formed by the warp and weft tie bars are welded to form welding points.

[0067] Both the warp and weft ties contain the following components and each component has the following content (calculated with the total weight of the ties as 100wt%):

[0068] Recycled PET 93.5wt%,

[0069] TPR masterbatch 3.5wt%,

[0070] Carbon black masterbatch 3wt%.

[0071] Among them, the intrinsic viscosity of recycled PET is 0.85.

[0072] The TPR masterbatch contains 98wt% ethylene-propylene-diene...

Embodiment 2

[0084] Such as Figure 5 As shown, this embodiment provides a bidirectionally stressed recycled PET / TPR alloy geogrid prepared according to the GSZ80 specification in the transportation industry standard JT / T 480-2002, which includes several warp-direction tie bars and several weft bars The warp ties are arranged in parallel, the arrangement direction of the weft ties is perpendicular to the arrangement direction of the warp ties, and each weft ties are alternately interspersed in their own length direction. Adjacent warp ties, interlaced points formed by warp ties and weft ties are welded to form welding points.

[0085] Both the warp and weft ties contain the following components and each component has the following content (calculated with the total weight of the ties as 100wt%):

[0086] Recycled PET 96.5wt%,

[0087] TPR masterbatch 3.5wt%.

[0088] Among them, the intrinsic viscosity of recycled PET is 0.88.

[0089] The TPR masterbatch contains 98wt% metallocene pol...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a regenerated PET / TPR alloy geogrid, and a preparation method thereof. The regenerated PET / TPR alloy geogrid is a continuous grid formed via staggered inserting and welding of a plurality of longitude direction rib strips and a plurality of latitude direction rib strips; the material and the size of the the longitude direction rib strips and the plurality of latitude direction rib strips are the same; and the longitude direction rib strips and the plurality of latitude direction rib strips both contain 85 to 99wt% of regenerated polyethylene terephthalate (PET), 1 to 8wt% of thermo-plastic-rubber (TPR) master batch, 0 to 3wt% of titanium dioxide, and 0 to 4wt% of carbon black master batch. The preparation method comprises following steps: the above ingredients are delivered into an extruder for uniform mixing and plastifying extrusion so as to obtain a blank; the blank is subjected to shock chilling and then is subjected to two times of single-direction longitudinal drawing so as to obtain a formed composition; and the formed composition is subjected to heat setting, knurling, and cooling so as to obtain the rib strips. The regenerated PET / TPR alloy geogrid contains TPR polymer, so that toughness of the rib strips is improved, embrittlement is not easily caused when stretching orientation degree is increased, welding performance of the rib strips is improved, and stripping resistance of welding points in soil body is improved.

Description

technical field [0001] The invention belongs to the application field of polymer materials, and relates to an alloy geogrid and a preparation method thereof. Background technique [0002] Geogrid is a kind of reinforced material used in civil engineering. Through its mutual friction with the soil, it can diffuse the soil stress, transmit the tensile stress, limit the lateral displacement of the soil, and increase the modulus of the soil, thereby Improve the shear and tensile strength of the soil and improve the overall stress conditions of the geotechnical structure. At present, geogrids have been widely used in civil engineering such as highways, railways, embankments, abutments, construction access roads, wharves, revetments, flood embankments, dams, tidal flat treatment, freight yards, slag yards, airports, sports fields, and environmental protection buildings. [0003] At present, the geogrids commonly used in China include thin-plate punched tensile geogrids, fiber war...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L23/16C08L23/02C08K5/1539C08K3/22C08K3/04E02D3/00
CPCC08L67/02C08L2205/03C08L2207/20E02D3/00E02D2300/0084C08L23/16C08L23/02C08K5/1539C08K2003/2241C08K3/04
Inventor 陈存兴刘波
Owner 上海自立塑料科技有限公司