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Flame-retardant PP/nylon corrugated tube composite material and preparation method thereof

A technology of flame-retardant polypropylene and composite materials, applied in the field of corrugated pipe materials, can solve the problem that there are no reports of flame-retardant polypropylene/nylon corrugated pipe composite materials and their preparation methods, high price of nylon material corrugated pipes, and bellows pipes. Poor mechanical properties and other problems, to achieve the effect of easy industrial production, excellent flame retardant performance and bending performance, and good electrical insulation

Active Publication Date: 2011-05-11
SHANGHAI KINGFA SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the characteristics of the material itself, each corrugated pipe in the prior art has its own advantages and disadvantages, which limits the application of the corrugated pipe
For example, bellows made of polypropylene material have poor mechanical properties and limited scope of use; bellows made of nylon material are expensive, have no flame retardancy, poor product stability, poor water absorption, and short service life
[0005] After extensively consulting public publications at home and abroad and searching patent documents, there is no report on flame-retardant polypropylene / nylon bellows composite materials and their preparation methods

Method used

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  • Flame-retardant PP/nylon corrugated tube composite material and preparation method thereof
  • Flame-retardant PP/nylon corrugated tube composite material and preparation method thereof
  • Flame-retardant PP/nylon corrugated tube composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1. Preparation of filler masterbatch:

[0042] 27 kg of polypropylene powder with a melt flow index of 1.2 g / 10 min and 30 kg of a mixture of particulate inorganic filler-calcium carbonate and aluminum silicate whiskers with an average particle size of 3 microns were pre-mixed evenly, and then 0.2 1 kg of thermal stabilizer Irganox 1010 and 0.2 kg of processing aids are then melted and granulated in a twin-screw extruder at a processing temperature of 140 to 250°C; filled masterbatches are made for use in the following examples.

[0043] 2. Preparation of flame retardant polypropylene / nylon composite material:

[0044] 60 kg of polypropylene, 25 kg of nylon 6, 10 kg of compatibilizer-maleic anhydride grafted polypropylene PP-g-MAH, 5 kg of toughening agent-EPDM, 2 kg of filler masterbatch, 15 kg of decabromodi Phenylethane, 5 kg of antimony trioxide, 0.2 kg of heat stabilizer and 0.3 kg of processing aid are added to a twin-screw extruder with a length-to-diameter rati...

Embodiment 2

[0049] Compatibilizer-maleic anhydride grafted POE (POE-g-MAH), 5 kilograms of toughening agent-POE, 3 kilograms of filling masterbatches prepared by 60 kilograms of polypropylene, 25 kilograms of nylon 6,5 kilograms , 0.2 kg of heat stabilizer, 10 kg of octabromo-S ether and 0.3 kg of processing aid are added into a twin-screw extruder with a length-to-diameter ratio of 40:1, melted and mixed at 230°C, extruded and granulated, and obtained This embodiment 2 flame-retardant PP / PA composite material.

[0050] The flame-retardant PP / PA composite material prepared in this example has high toughness, excellent impact resistance, flame retardancy and high heat distortion temperature, and has good surface gloss, good chemical corrosion resistance, and UV aging and abrasion resistance, electrical insulation performance is greater than 400MΩ, the performance test results are shown in Table 2:

[0051] Flame-retardant PP / PA composite material properties prepared in Table 2 Example 2

...

Embodiment 3

[0054] Compatibilizer-maleic anhydride grafted POE (POE-g-MAH), 5 kilograms of toughening agent-TPV, 2 kilograms of filling masterbatches prepared by embodiment 1 of 60 kilograms of polypropylene, 25 kilograms of nylon 6,5 kilograms , 10 kg of decabromodiphenylethane, 5 kg of octabromoether, 5 kg of antimony trioxide, 0.2 kg of heat stabilizer, and 0.5 kg of processing aids are added into a twin-screw extruder with a length-to-diameter ratio of 40:1 In the machine, carry out melt mixing and dispersion at 230°C, extrude and granulate, and prepare the flame-retardant PP / PA composite material of Example 3.

[0055] The flame-retardant PP / PA composite material prepared in this example has high toughness, excellent impact resistance and high heat distortion temperature, and has good surface gloss, good chemical corrosion resistance, UV aging resistance and Wear resistance performance, electrical insulation performance is greater than 200MΩ, the specific performance is shown in Tabl...

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Abstract

The invention relates to a corrugated tube material and particularly discloses a flame-retardant PP (Polypropylene) / nylon corrugated tube composite material and a preparation method thereof, aiming to overcome the shortcomings in the prior art that the mechanical property of the PP corrugated tube is bad, the nylon corrugated tube is not flame-retardant, the stability is bad, and the service lifeis short. The material disclosed by the invention comprises the following substances by weight percentage: 47-75 of PP, 3-40 of nylon, 5-30 of flame retardant, 5-20 of compatilizer, 1-40 of flexibilizer, 0-10 of filling master batches, 0.2-1.5 of heat stabilizer, and 0.2-1.5 of processing agent. The preparation method comprises the steps as follows: the filling master batches are firstly preparedand then added into a twin-screw extruder to melt and mix with other materials, and pelletings are extruded out to prepare the flame-retardant PP / nylon composite material. The invention has the advantages of favorable flame-retardant property, excellent high-temperature resistance, friction resistance, chemical corrosion resistance, long service life, high surface glossiness, high electrical insulativity, simple manufacturing technology, and low cost.

Description

technical field [0001] The invention relates to a bellows material, in particular to a flame-retardant polypropylene / nylon bellows composite material and a preparation method thereof. Background technique [0002] The bellows is a cylindrical thin-walled elastic shell with transverse corrugations, which has many functions such as conversion, compensation, connection and energy storage. Compared with pipes made of the same material, corrugated pipes have the advantages of light weight, beautiful appearance, durability, low cost, and good elasticity. They are widely used in petrochemical, instrumentation, aerospace, chemical, electric power, cement, metallurgy and other fields. When in use, the open end of the bellows is fixed, and the sealed end is in a free state. Under the action of internal or external pressure, it changes along the longitudinal or radial direction of the pipe, which plays the role of shock absorption and maintaining the connection of specific equipment. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L77/00C08L77/02C08L77/06C08L23/00C08K13/02C08K13/04B29B9/06B29C47/92B29C48/92
CPCB29C48/625B29C48/04B29C48/92B29C2948/92704B29C2948/92895
Inventor 杨泽夏建盟何威陶四平肖鹏张春怀
Owner SHANGHAI KINGFA SCI & TECH
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