CN102787573A

CN102787573A - High-strength anti-collision reflective guardrail

Info

Publication number: CN102787573A
Application number: CN2012103053586A
Authority: CN
Inventors: 周永山
Original assignee: ZHEJIANG ZHEPAI TECHNOLOGY Co Ltd
Current assignee: ZHEJIANG ZHEPAI TECHNOLOGY Co Ltd
Priority date: 2012-08-23
Filing date: 2012-08-23
Publication date: 2012-11-21
Anticipated expiration: 2032-08-23
Also published as: CN102787573B

Abstract

The invention discloses a high-strength anti-collision reflective guardrail, comprising vertical columns and a cross bar connected with the vertical columns, wherein the cross bar comprises a base body and a reflective strip integrated with the base body into a whole; the base body and the reflective strip are made of ABS (Acrylonitrile Butadiene Styrene) resin composite materials and are integrally injected and molded through a double screw rod injection molding machine. The base body and the reflective strip disclosed by the invention are made of reasonably proportioned ABS resin composite materials and are integrally injected and molded through the double screw rod injection molding machine, so that the high-strength anti-collision reflective guardrail with good impact strength, bending strength, bending modulus and tensile strength and permanent good reflection performance can be obtained.

Description

High-strength crashproof reflective guardrail

Technical field

The present invention relates to a kind of guard bar device, relate in particular to high-strength crashproof reflective guardrail.

Background technology

Guardrail generally is meant in garden, both sides of highway or median strip with road laterally arranges and blocks facility; It mainly acts on is to prevent that the improper enforcement vehicle that faulty driver or other reasons cause from running off highway or passing through the traffic accident generation that the subtend track is swarmed in the median strip; Protection trackside pedestrian, building, driver and Che go up occupant safety, have the effect of inducing pilot's line of vision, increase traffic safety sense and beautifying highway environment simultaneously concurrently.Existing guardrail generally adopts metal material to brush reflectorized material, and to process its defective of this kind guardrail be that the manufacturing cost long-time use of reflectorized material high, that receive rainwater burn into brushing form easily causes technological deficiencies such as reflecting effect disappearance easily.

The guardrail such as ABS, PC, PS and the PET etc. that at present also have plastics to process.U.S. Pat 4222522 has been studied the guardrail that PS, PP, PE and intermingling material thereof make through extrusion molding, and it can prevent that guardrail from being corroded and mechanical abrasion, and it is simple in structure, economy and durability.U.S. Pat 20060102883A1 has developed the polyurethane resin guardrail; Wherein reinforcing material adopts sandwich construction; Kind has carbon fiber and Kevlar fiber etc.; It is 40%～60% not wait that its composition accounts for volume fraction greatly, but also has studied the matrix that can use vinyl, epoxy resin, polyester or other macromolecular materials to do the guardrail material, adds the impact property that ethane also can improve material.Above-mentioned research mainly comprises the research of matrix material; The interpolation and the formulation optimization of composition proportion design between matrix and the additive and optimization, reflective dose and flexibilizer; The research of the research of recombination mechanism and characteristic between matrix material and the additive, material microstructure and structural research, mechanical properties of materials, the research of material reflective function, material composition to the reflective mechanism of the influence of mechanical property and reflective function, material and reflective The Characteristic Study etc., finally can not obtain a kind of composite material that has good impact strength, bending strength, bending modulus, hot strength concurrently to the influence of mechanical property and reflective function, material microstructure.

Summary of the invention

The invention provides a kind of good impact strength, bending strength, bending modulus, hot strength anticollision barrier of having concurrently and have permanent good reflective function simultaneously.

A kind of high-strength crashproof reflective guardrail, the horizontal bar that comprises column and connect column, described horizontal bar comprise matrix and constitute with the reflecting strips of matrix one that matrix and reflecting strips are the ABS resin composite material and pass through twin-screw injection machine integrated injection molding; Described matrix composition in the weight portion proportioning is: 0.8 part of 200 parts of ABS resins, 50 parts of thermoplastic polyurethane elastic plastic cement, 20 parts of PNBRs, 20 parts of nanoclays, 60 parts of potassium titanate crystal whiskers, 2 parts, 2 parts antioxidant 1010s of calcium stearate, atoleine; Described reflecting strips composition in the weight portion proportioning is: 200 parts of ABS resins, 50 parts of thermoplastic polyurethane elastic plastic cement, 20 parts of PNBRs, 20 parts of nanoclays, 60 parts of potassium titanate crystal whiskers, 2 parts, 2 parts antioxidant 1010s of calcium stearate, 0.8 part of atoleine, 10 parts of borosilicate glass powder.

The present invention utilizes thermoplastic polyurethane elastic plastic cement and acrylonitrile-butadiene rubber to mix to make and is used for strengthening toughness reinforcing ABS resin, increases on the ABS resin intensity in order to make, adopts the common modified ABS resin of nanoclay simultaneously.Because the crashworthiness and the crashproof mechanism of material have close ties; And most of at present crashproof mechanism researchs to the guardrail material mainly show macromechanics analytically; For also fewer in the research of microcosmic particle; And the macroscopic failure of material is because material just destroys on microcosmic, and micro-damage is to show through the macroscopic failure pattern, and it has determined the energy absorption capability of material.Therefore the present invention utilizes ESEM (SEM) that its notch shock section is observed and analyzed, inquiring into its crashproof mechanism, for the practical application of this material provides theoretical reference acquisition rational proportion.

Usually the method that improves the ABS resin erosion-resisting characteristics is main with physical blending modification method mainly; Characteristics such as it is on the basis of original ABS resin, improves the erosion-resisting characteristics of ABS resin through adding flexibilizer, and this method has that investment is little, instant effect, risk are little; Therefore generally receive people's concern; Especially in the initial stage of China's ABS resin large-scale production, more should improve the performance of original universal ABS resin with blending modification method, to enlarge its application.Through the research toughness reinforcing of different flexibilizer to ABS; Investigate the mechanical properties such as impact resistance of material; Analysis has been carried out in its toughening effect and the overall balance of other mechanical properties and processing characteristics set forth, the processing stability of toughness reinforcing back material is studied, the result shows: the adding of different flexibilizer will cause the decline of other mechanical properties of material; Use wherein that thermoplastic polyurethane elastic plastic cement (TPU) is toughness reinforcing to obtain impact property preferably, but cause other mechanical properties losses bigger; Thermoplastic polyurethane elastic plastic cement (TPU) can improve drawing abillity in toughness reinforcing ABS resin; The toughness reinforcing ABS resin of thermoplastic polyurethane elastic plastic cement (TPU) can improve impact strength and reduce hot strength, and the toughness of the big structural meterials of original fragility is improved, and has improved using value; Along with the increase of TPU content, impact strength increases, and is to reach maximum at 20% o'clock at content, is tending towards subsequently descending.The nanoclay rigid particles can improve the toughness and the intensity of ABS resin, but the increase rate of impact intensity is limited; Potassium titanate crystal whisker can improve the processing characteristics and the ageing resistace of ABS resin compound system, but add potassium titanate crystal whisker merely the mechanical property of ABS resin compound system is reduced.The present invention mainly is that to improve ABS resin mechanical property, nanoclay be that flexibilizer, potassium titanate crystal whisker are that to be that auxiliary material are common obtain high-strength anticollision barriers for reinforcing agent, calcium stearate, antioxidant 1010, atoleine for matrices of composite material, thermoplastic polyurethane elastic plastic cement and PNBR with the ABS resin thus.

In order to verify that the present invention adopts the mechanical property of ABS resin composite material, and adopt the following table prescription to verify the mechanical property under the used various material mixing state.

Prescription number is thought 1#, 2#, 3#, 4#, 5#, 6# statement

When carrying out extrusion forming successively by the prescription shown in the last table, 6 kinds of prescription extrusions all compare smoothly, and the surperficial smoother of extruded material, do not have unusual defective.Injection mo(u)lding is also relatively more smooth, smooth, closely knit, the no abnormal phenomenon of product surface that obtains after the moulding.

6 kinds of its performance tests of shaped article that obtain are afterwards like following table.

Can find out from last table; After the ABS resin of the toughness reinforcing 1# of thermoplastic polyurethane elastic plastic cement (TPU); Compare impact strength with ABS resin and not only do not improve and descended manyly on the contrary, wherein 2# has descended 36.6%, and 3# has descended 35.8%; 4# has fallen 50.8%, and the possibility of tracing it to its cause is good owing to molding parameter is difficult to control the compatibility that causes TPU/ABS.After 2# had only added TPU, two important index were compared with the ABS resin of 1# not only and are not improved, and it is few to have descended on the contrary.3# compares with the 1#ABS resin with 2# and is more or less the same; Just the impact strength of 3# is bigger slightly than 2#, and the bending modulus bending strength has increased 7% and 52.7% respectively, and hot strength has descended 8.4%; This is the toughness reinforcing result of enhancing who has added nanoclay, but toughening effect is not clearly.4# compares with 3#; Added potassium titanate crystal whisker; Impact strength decreased 23.3%; And bending modulus, bending strength and hot strength are divided and you can well imagine 7.87%, 17.7% and 18.1%, and the amplitude of raising is high less than decline scope, explain to have added potassium titanate crystal whisker separately effect neither be fine afterwards.5# compares with the 1#ABS resin and has only added PNBR, and impact strength has improved 81.3% to be had the decline except bending modulus slightly, and the variation of bending strength and hot strength is not obvious, explains that acrylonitrile-butadiene rubber can fine toughness reinforcing ABS resin.6# is that proportioning of the present invention can find out significantly that performance that its impact strength, bending strength, bending modulus, hot strength all are better than above-mentioned five kinds of proportionings has obtained the advantage general character of various materials.

Described borosilicate glass granularity is that 10-250 micron, wall thickness are the hollow ball of 1-2 micron.Borosilicate glass has floatability; Can impel borosilicate glass to be in the reflecting strips surface, under the state of high-temperature, can remain on the reflecting strips surface has enough reflective spots; And have self-cleaning ability and moistureproof ability, can reduce the pollution of rainwater, sand and dust to the road reflecting strips.The borosilicate glass microballon of hollow ball shape has light weight, low heat conduction, intensity is high and good advantages such as chemical stability are obtained better reflecting effect.

The present invention is the ABS resin composite material of rational proportion through twin-screw injection machine integrated injection molding through matrix and reflecting strips, obtained a kind of high-strength anticollision barrier that has good impact strength, bending strength, bending modulus, hot strength concurrently and had permanent good reflective function simultaneously.

Description of drawings

Be illustrated in figure 1 as the high-strength crashproof reflective guard bar structure sketch map of the present invention.

The specific embodiment

A kind of high-strength crashproof reflective guardrail as shown in Figure 1; Comprise column 1 and the horizontal bar 2 that connects column 1; Described horizontal bar 2 comprises matrix and constitutes with the reflecting strips of matrix one 3 that matrix and reflecting strips 3 are the ABS resin composite material and pass through twin-screw injection machine integrated injection molding; Described matrix composition in the weight portion proportioning is: 0.8 part of 200 parts of ABS resins, 50 parts of thermoplastic polyurethane elastic plastic cement, 20 parts of PNBRs, 20 parts of nanoclays, 60 parts of potassium titanate crystal whiskers, 2 parts, 2 parts antioxidant 1010s of calcium stearate, atoleine; Described reflecting strips (3) composition in the weight portion proportioning is: 200 parts of ABS resins, 50 parts of thermoplastic polyurethane elastic plastic cement, 20 parts of PNBRs, 20 parts of nanoclays, 60 parts of potassium titanate crystal whiskers, 2 parts, 2 parts antioxidant 1010s of calcium stearate, 0.8 part of atoleine, 10 parts of borosilicate glass powder.

As structure optimization borosilicate glass granularity is that 10-250 micron, wall thickness are the hollow ball of 1-2 micron.

Claims

1. high-strength crashproof reflective guardrail; Comprise column (1) and the horizontal bar (2) that connects column (1); It is characterized in that: described horizontal bar (2) comprises matrix and constitutes with the reflecting strips (3) of matrix one that matrix and reflecting strips (3) are the ABS resin composite material and pass through twin-screw injection machine integrated injection molding; Described matrix composition in the weight portion proportioning is: 0.8 part of 200 parts of ABS resins, 50 parts of thermoplastic polyurethane elastic plastic cement, 20 parts of PNBRs, 20 parts of nanoclays, 60 parts of potassium titanate crystal whiskers, 2 parts, 2 parts antioxidant 1010s of calcium stearate, atoleine; Described reflecting strips (3) composition in the weight portion proportioning is: 200 parts of ABS resins, 50 parts of thermoplastic polyurethane elastic plastic cement, 20 parts of PNBRs, 20 parts of nanoclays, 60 parts of potassium titanate crystal whiskers, 2 parts, 2 parts antioxidant 1010s of calcium stearate, 0.8 part of atoleine, 10 parts of borosilicate glass powder.

2. high-strength crashproof reflective guardrail as claimed in claim 1 is characterized in that: described borosilicate glass granularity is that 10-250 micron, wall thickness are the hollow ball of 1-2 micron.