Preparation technology of special pipe for pit latrine improvement

A preparation process and pipe material technology, which is applied in the field of modified polymer materials, can solve the problems of high molecular structure regularity, poor impact strength, and poor dimensional stability, and achieve the effects of simple operation, good toughness, and reduced production costs

Inactive Publication Date: 2018-04-06
山东中海塑胶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the rigidity of polypropylene is slightly higher than that of polyethylene, it still does not meet the requirements
Moreover, due to its high molecular structure regularity at room temperature or low temperature environment, its impact strength is poor, its cold resistance is poor, and it is easy to crack in low temperature environment
[0004] PA66 is a very commonly used polar polymer material, which has high rigidity and strength, excellent toughness and impact resistance, good self-lubricating property, good wear resistance, good chemical resistance, good low temperature characteristics, and has Excellent processing characteristics, the above characteristics make PA66 suitable for the harsh environment of low temperature and strong corrosion in the northern dry toilet, and it is self-lubricating and easy to install, but its water absorption is large, so its dimensional stability is poor

Method used

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  • Preparation technology of special pipe for pit latrine improvement
  • Preparation technology of special pipe for pit latrine improvement
  • Preparation technology of special pipe for pit latrine improvement

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preparation example Construction

[0043] In the preparation method of the special pipe material for dry toilet renovation of the present invention, carbon black master batch is also added. The interior of carbon black is a fused ring aromatic structure, and there are many oxygen-containing functional groups on its surface. They are mainly carboxyl groups, lactone groups, phenolic hydroxyl groups and quinone groups. In a blended system, it is difficult for the polyethylene phase to introduce strong chemical interface bonding. In order to make the inorganic rigid particles uniformly dispersed in the system, the coupling agent can wrap the inorganic rigid particles and form a layer on the surface of the inorganic rigid particles to produce strong Physically entangled flexible interface layer to achieve the effect of toughening rigid particles. However, the simple introduction of a non-chemically bonded flexible interface layer can enhance the impact resistance of the material, but it will adversely affect the tens...

Embodiment 1

[0055] 1) According to parts by weight, mix 90 parts of extruded high-density polyethylene, 10 parts of nylon, 6 parts of coupling agent, 6 parts of inorganic rigid particles, and 3 parts of carbon black masterbatch at 80℃;

[0056] 2) Put the above mixture into a cold mixer and cool it to 35°C, then drive it into a dry bin;

[0057] 3) The mixture in the drying silo is extruded with a single-screw equipment. The process parameters are selected as follows: body temperature: 140°C, confluence core temperature: 160°C, head temperature: 185°C; host one rotation speed: 10 revolutions / Min, the second main engine speed: 10 rpm;

[0058] 4) The extruded pipe is formed by module, vacuum and cooling;

[0059] 5) Cut to length and pack.

Embodiment 2

[0061] 1) According to parts by weight, mix 80 parts of extruded high-density polyethylene, 20 parts of nylon, 5 parts of coupling agent, 5 parts of inorganic rigid particles, and 4 parts of carbon black masterbatch at 80℃;

[0062] 2) Put the above mixture into a cold mixer and cool it to 35°C, then drive it into a dry bin;

[0063] 3) Extrude the pipe material from the mixed material in the drying silo with dual-host equipment. The process parameters are as follows: body temperature: 140°C, confluence core temperature: 160°C, head temperature: 185°C; host speed: 10 revolutions / Min, the second main engine speed: 10 rpm;

[0064] 4) The extruded pipe is formed by module, vacuum and cooling;

[0065] 5) Cut to length and pack.

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Abstract

The invention discloses a special pipe for pit latrine improvement and a preparation method. The special pipe for pit latrine improvement comprises, by weight, 100 parts of modified polyethylene and nylon mixture, 3-10 parts of coupling agent, 3-10 parts of inorganic rigid particles, 2-6 parts of carbon black master batch and 2-5 parts of flexibilizer. The preparation process comprises the steps that the components are evenly mixed in a high-speed mixer at the temperature of 80-90 DEG C and cooled to 25-45 DEG C in a cold mixer; after the components are uniformly mixed, the pipe is produced through single-screw extrusion, and after module forming, vacuum shaping, cooling and forming, fixed-length cutting and packaging are conducted. According to the pipe, due to nylon and polyethylene blending modification and application of rigid particles, the problem about rigidity and toughness balance is well solved, that is, the pipe has relatively high toughness while having high ring stiffness.

Description

Technical field [0001] The invention relates to a polyethylene / nylon 66 composition, which belongs to the field of modified polymer materials. Background technique [0002] The special pipes for dry toilets are made of polyethylene or polyvinyl chloride resin as the main raw material, added with appropriate additives, and extruded to form the pipe. It has the advantages of light weight, low resistance, high compressive strength, corrosion resistance and convenient construction. At present, pipe ring stiffness and toughness are often contradictory in actual production. It is difficult to grasp the balance between ring stiffness and toughness. Polyethylene resin has good toughness but poor rigidity, and PVC ring has high stiffness but poor toughness. Polyethylene is in the construction process. Problems such as deep burying and flattening and serious brittle damage of PVC, especially during winter construction, often occur. The use conditions of dry toilet pipes are relatively ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L77/06C08K13/02C08K3/26C08K3/34C08K3/04C08K5/54C08K5/10B29C47/92B29C48/92
Inventor 刘建龙
Owner 山东中海塑胶有限公司
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