A high temperature resistant, high pressure resistant polyethylene composition
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A heat-resistant polyethylene and high-pressure technology, applied in the high-pressure polyethylene composition and high-temperature field, can solve the problem of increasing the complexity and production cost of the pipe production process, low pressure resistance and physical and mechanical properties, and high pressure resistance. Low grade and other problems, to achieve the effect of saving raw materials for pipe production, good high temperature oxidation resistance, and improving heat resistance temperature
Active Publication Date: 2016-10-26
CHINA PETROLEUM & CHEM CORP
View PDF5 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0006] PE-RT pipe materials currently on the market can produce pipes with smaller diameters, and have low pressure resistance and physical and mechanical properties, which limits their use in fields with high pressure resistance and high physical and mechanical properties, such as industrial oil pipelines
Moreover, due to the low pressure rating of the pipe material, in order to meet the transportation requirements, the wall thickness of the pipe must be thicker or compounded with other materials, and more raw materials are used to prepare the pipe, which increases the complexity of the pipe production process and production costs.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1～5
[0026] The preparation method of embodiment 1~5, carry out as follows:
[0027] a) Put the heat-resistant polyethylene resin, antioxidant, acid absorbing agent, and processing aid into a high-speed mixer to stir and mix, the stirring speed is 1300 rpm, the stirring time is 12min, and the stirring temperature is 38°C;
[0028] b) Add the homogeneously mixed materials into a twin-screw extruder for melting, plasticizing, extruding, and granulating. The length-to-diameter ratio of the screw is 36, and the screw combination used has 6 shear blocks, including 3 reverse shear blocks, and the processing temperature is 230°C.
Embodiment 6～10
[0031]The preparation method of embodiment 6~10, carry out as follows:
[0032] a) Put the heat-resistant polyethylene resin, antioxidant, acid absorbing agent, and processing aid into a high-speed mixer to stir and mix, the stirring speed is 1600 rpm, the stirring time is 13min, and the stirring temperature is 40°C;
[0033] b) Add the homogeneously mixed materials into a twin-screw extruder for melting, plasticizing, extruding, and granulating. The length-to-diameter ratio of the screw is 34, and the screw combination used has 5 shear blocks, including 2 reverse shear blocks, and the processing temperature is 225°C.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Property
Measurement
Unit
density
aaaaa
aaaaa
melt flow index
aaaaa
aaaaa
density
aaaaa
aaaaa
Login to view more
Abstract
The invention relates to a high-temperature and high-pressure resistant polyethylene composition as well as a preparation method thereof, belongs to the field of high molecular materials, and mainly relates to the high-temperature and high-pressure resistant polyethylene composition as well as the preparation method thereof. The high-temperature and high-pressure resistant polyethylene composition is prepared from the following components in parts by weight: 100 parts of heat-resistant polyethylene resin, 0.3-0.55 part of an antioxidant, 0.05-0.2 part of an acid-acceptor and 0.02-0.08 part of a processing agent. The high-temperature and high-pressure resistant polyethylene composition provided by the invention has good high-temperature oxidation resistance, long-term heat resistant stable performance and higher physical mechanical strength, and has excellent long-term tube hydrostatic strength under conditions of high and low temperatures. When the prepared composition is used for producing pressure tubes in same specification, the raw materials for producing tubes can be saved by over 10%.
Description
technical field [0001] The invention discloses a high-temperature-resistant and high-pressure-resistant polyethylene composition, which belongs to the field of polymer materials, and in particular relates to a high-temperature-resistant and high-pressure-resistant polyethylene composition. Background technique [0002] Heat-resistant polyethylene (referred to as PE-RT), is a non-cross-linked polyethylene, which is synthesized by special molecular design and polymerization process, and can be used in the production of hot and cold water pipelines with heat resistance requirements, such as floor heating, Heat exchangers, solar tubes and oil pipelines, etc. [0003] At present, the polyolefin pipes used for hot and cold water pipelines mainly include cross-linked polyethylene (PEX) pipes, random copolymerized polypropylene (PPR) pipes, heat-resistant polyethylene (PE-RT for short) pipes, polybutene ( PB) pipes, etc. Among them, PE-RT pipeline system has many comprehensive per...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more