Special polyethylene double-wall corrugated pipe outer wall material with high bending modulus and high oxidation induction time and preparation method of special material

A technology of double-wall corrugated pipe and flexural modulus, which is applied in the field of special materials for the outer wall of polyethylene double-wall corrugated pipes and its preparation, can solve the problem of large fluctuations in the powder content of special materials, insignificant filling and reinforcing effects, ultra-fine talc powder Easy to agglomerate and other problems, to achieve the effect of stable and convenient production, uniform oxidation performance and good toughness

Active Publication Date: 2021-05-25
TIANJIN YONGGAO PLASTIC IND DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]1. Ultra-fine talc powder is easy to agglomerate, which easily leads to uneven dispersion and difficult processing, so that the filling and reinforcing effect of the final product is not obvious, etc.
[0005]2. It is easy to layer when mixed with HDPE particles, resulting in large fluctuations in the powder content of special materials
[0006]3. Products made of ultra-fine talc powder and HDPE particles have insufficient toughness and are easy to break
[0007]4. Products made by mixing ultra-fine talc powder and HDPE particles may easily lead to uneven anti-oxidation performance of various parts

Method used

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  • Special polyethylene double-wall corrugated pipe outer wall material with high bending modulus and high oxidation induction time and preparation method of special material
  • Special polyethylene double-wall corrugated pipe outer wall material with high bending modulus and high oxidation induction time and preparation method of special material
  • Special polyethylene double-wall corrugated pipe outer wall material with high bending modulus and high oxidation induction time and preparation method of special material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 3

[0039] In Example 3 and Example 4, the silane coupling agent is A-1120, and POE is a copolymer of ethylene and octene; the powder fineness D50 of talcum powder is 3.86 μm; the melt index of HDPE is 1.5g / 10min; The powder fineness D50 of wollastonite powder is 5μm, and the aspect ratio is 16. The rotating speed in step 1 of embodiment 3 and embodiment 4 is 1000r / min, the temperature is 120°C, the mixing time is 10min, and the stirring time is 10min; the processing temperature in step 2 is 210°C.

experiment example 1

[0045] Carry out following performance test to the polyethylene double-wall corrugated pipe special material that the embodiment of the present invention and comparative example make:

[0046] According to GB / T3682.1-2018, GB / T1033.1-2008, GB / T9341-2008, GB / T19466.6-2009, melt index, density test, bending strength and oxidation induction were carried out on the materials prepared in the examples time. The test results are recorded in Table 2.

[0047] The detection data of table 2 embodiment and comparative example

[0048]

[0049]

[0050] Combined with Table 1, compare the experimental data in Table 2:

[0051] Analysis of comparative results:

[0052] From the experimental data of Examples 1 to 5, it can be seen that the special material prepared by the formula of the present invention has good flexural modulus and anti-oxidation performance, which are improved compared with the performance of the special material in the prior art.

[0053] Comparing Comparative ...

experiment example 2

[0056] This experimental example investigates the influence of talcum powder with different powder fineness D50 on the bending performance and oxidation resistance time of the final special material for the outer wall of polyethylene double-wall corrugated pipe.

[0057] Method is: method and component content are the same as embodiment 5, and difference is that the fineness of the talcum powder that adopts is different, and the results are shown in table 2:

[0058] Table 2 Performance results of special materials made from talcum powder with different fineness

[0059] project D50(μm) Bending strength (MPa) Oxidation induction time (min) Example 5 3.86 2245 71 Example 8 3.28 2257 70 Example 9 4.06 2216 69 Example 10 4.52 2208 69 Example 11 5.00 2208 68 Example 12 6.00 2204 65 Example 13 6.54 2082 66 Example 14 8.57 1989 67 Example 15 10.86 1950 63

[0060] From the experimental data in...

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Abstract

The invention provides a special polyethylene double-wall corrugated pipe outer wall material with high bending modulus and high oxidation induction time and a preparation method thereof, and the special polyethylene double-wall corrugated pipe outer wall material comprises the following components in parts by weight: 80-100 parts of HDPE, 8-15 parts of POE, 25-40 parts of talcum powder, 5-10 parts of wollastonite powder, 3-5 parts of polyethylene wax, 1-2 parts of calcium stearate, 1-2 parts of a silane coupling agent, 1-2 parts of an antioxidant and 2-5 parts of black masterbatch. The HDPE, the POE, the polyethylene wax and the calcium stearate in the components are all powder materials. According to the special polyethylene double-wall corrugated pipe outer wall material, chemical bonding is generated between polyethylene resin and the inorganic powder by adding the coupling agent, so that the polyethylene resin and the inorganic powder are combined more stably and dispersed more uniformly, and the prepared special material has higher flexural modulus and oxidation induction time; and the oxidation resistance of each part is uniform and consistent while the oxidation resistance is improved.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a special material for the outer wall of a polyethylene double-wall corrugated pipe with high flexural modulus and high oxidation induction time and a preparation method thereof. Background technique [0002] Polyethylene double-wall corrugated pipe has the characteristics of excellent compression resistance, flexibility, low temperature resistance and impact resistance, and is not easy to break. Based on the above advantages, polyoxyethylene double-wall corrugated pipes have been widely used in municipal drainage and sewage, farmland water conservancy irrigation and water delivery, communication cable sheathing and other fields. [0003] The flexural modulus of the special material can characterize the ring stiffness of the bellows, which indicates the ability of the bellows to resist external pressure loads. Oxidation induction time is an index to evaluat...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08K13/04C08K7/10C08K3/34C08K5/098C08K5/5435C08K5/134
CPCC08L23/06C08L2203/18C08L2207/062C08L2205/025C08L2205/03C08L2201/08C08L23/0815C08K13/04C08K7/10C08K3/34C08K5/098C08K5/5435C08K5/1345
Inventor 谷博段洪文韩力
Owner TIANJIN YONGGAO PLASTIC IND DEV CO LTD
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