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Material special for polyvinyl chloride drainpipe member

A technology of polyvinyl chloride and drainage pipe fittings, which is applied in applications, household appliances, tubular objects, etc., can solve problems such as unstable product quality, decline in product physical properties, and difficulty in feeding hoppers, so as to improve the flow performance and processing performance of the system. The effect of improving decentralization and compatibility and improving market competitiveness

Inactive Publication Date: 2008-04-02
TIANJIN DEHAO NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem in the rigid PVC resin injection molding process: it is difficult to feed the hopper, and it is easy to bridge, resulting in unstable product quality
In addition, when PVC resin dry blends are processed, due to their poor fusion performance and high melt viscosity, they will degrade at high shear rates, thereby greatly reducing the physical properties of the product.
Moreover, in this injection molding process, since there is no granulation process to help remove volatiles and low molecular substances, it is easy to cause some defects in the finished product, such as butterfly patterns or bubbles in the product, which will make the appearance and performance of the product worse. not meet the requirements

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0016] The preparation method of the special material for polyvinyl chloride drainage pipe fittings of the present invention is as follows: put the measured 6000-mesh inorganic material powder into a high-speed mixer and mix at a high speed, and start dehumidification when the temperature reaches 80°C to 90°C, and the temperature reaches 110°C After reaching 160°C, add stearic acid and mix and stir for 5 to 10 minutes, then put the mixture in the high mixer into the cold mixer for cooling, and after cooling to 30°C to 50°C, discharge the material to obtain modified 6000 mesh Inorganic material powder; put polyvinyl chloride (PVC), stabilizer, and plasticizer (DOP) into a high-mixer, mix and stir, and start dehumidification when the temperature reaches 80°C to 90°C. Put the 6000-mesh inorganic material powder, paraffin wax, titanium dioxide, and whitening agent into the high mixer and continue to mix and stir. When the temperature rises to 105°C to 135°C, put the mixture in the ...

Embodiment 1

[0037] Special powder formula for PVC drainage pipe fittings:

[0038] Polyvinyl chloride (PVC) 100kg

[0039] Stabilizer (commercially available dust-free composite lead stabilizer) 6kg

[0040] Processing modifier (commercially available ACR401, polyacrylate) 4kg

[0041] Plasticizer (DOP, polydioctyl phthalate) 2kg

[0042] Stearic acid (HSt) 0.6kg

[0043] Paraffin (WAX) 0.6kg

[0044] Titanium dioxide (TiO 2 ) 2kg

[0045] Whitening agent (commercially available) 0.05kg

[0046] 6000 mesh inorganic material powder (heavy calcium carbonate) 50kg

[0047] Put 50kg of 6000-mesh inorganic material powder into a high-speed mixer and mix at a high speed. When the temperature reaches 80°C, dehumidification begins. After the temperature reaches 110°C, add stearic acid and mix for 10 minutes. Put the mixture into the cold mixer and cool it down. After reaching 40°C, the modified 6000-mesh inorganic material powder is obtained; put polyvinyl chloride (PVC), stabilizer, and ...

Embodiment 2

[0053] Special pellet formula for PVC drainage pipe fittings:

[0054] Polyvinyl chloride (PVC) 100kg

[0055] Stabilizer (commercially available dust-free composite lead stabilizer) 6kg

[0056] Processing modifier (commercially available ACR401, polyacrylate) 4kg

[0057] Plasticizer (DOP, polydioctyl phthalate) 2kg

[0058] Stearic acid (HSt) 0.6kg

[0059] Paraffin (WAX) 0.6kg

[0060] Titanium dioxide (TiO 2 ) 2kg

[0061] Whitening agent (commercially available) 0.05kg

[0062] 6000 mesh inorganic material powder (heavy calcium carbonate) 50kg

[0063] Put 50kg of 6000-mesh inorganic material powder into a high-speed mixer and mix at a high speed. When the temperature reaches 85°C, dehumidification begins. After the temperature reaches 120°C, add stearic acid and mix for 5 minutes. Put the mixture into the cold mixer and cool it down. After reaching 50°C, the modified 6000-mesh inorganic material powder is obtained; put polyvinyl chloride (PVC), stabilizer, and p...

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PUM

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Abstract

The present invention provides a special powder material for polyvinyl chloride drainage pipe and is made of polyvinyl chloride, stabilizer, processing modifier, plasticizer, stearic acid, paraffin wax, pigment and powder of 6000-order inorganic material and so on. The raw materials after being weighed are mixed well by a high mixing machine to prepare special powder material for polyvinyl chloride drainage pipe; or the special powder material for polyvinyl chloride drainage pipe is extruded by an extruder for granulation to prepare the special particle material for polyvinyl chloride drainage pipe. The special material for polyvinyl chloride drainage pipe is then molded by a plastic injection molding machine to prepare drainage pipes of various specifications.

Description

technical field [0001] The invention relates to raw materials for plastic pipe fittings, in particular to a special material for polyvinyl chloride drainage pipe fittings composed of 6000-mesh inorganic material powder mixed with polyvinyl chloride (PVC) resin. Background technique [0002] Polyvinyl chloride (PVC), stabilizers, processing modifiers, plasticizers (DOP), stearic acid, paraffin, pigments and inorganic material powders are properly mixed to produce PVC for various purposes Plastic products, such as rigid, semi-rigid or soft polyvinyl chloride products. [0003] In recent years, due to the high price of polyvinyl chloride (PVC) resin, the manufacturers of PVC drainage pipe fittings continue to find ways to reduce product costs, so that the market for drainage pipe fittings varies from good to bad. Some formal enterprises insist on producing high-quality products to ensure quality But its competitiveness is getting weaker and weaker; most companies are oriented ...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08K5/09B29C45/00B29D23/00C08K3/22C08K3/36C08K3/26
Inventor 王获陈昊罗纬黑毅许晓秋周逸奇
Owner TIANJIN DEHAO NEW MATERIALS
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