Low-temperature impact resistance PP-R tubing and preparation method thereof

A low-temperature impact-resistant, PP-R technology, applied in the field of PP-R pipe and its preparation, can solve the problem that the internal pressure resistance of the pipe decreases, the content of PP-B material is high, and the mixture of PP-R material and PP-B material is not good. Very uniform and other problems, to achieve the effect of good internal pressure resistance and improved low temperature impact resistance

Active Publication Date: 2013-10-23
杭州鸿雁管道系统科技有限公司
View PDF2 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The content of PP-B material in the pipe obtained by this method is too high, and the mixing of PP-R material and PP-B material is not very uniform, which will inevitably lead to the decline of the internal pressure resistance of the pipe.

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
  • Low-temperature impact resistance PP-R tubing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take 90kg random copolymerized polypropylene powder, 9.5kg block copolymerized polypropylene powder, 0.3kg N,N'-dicyclohexyl-2,6-naphthalene dicarboxamide β crystal nucleating agent, and other processing aids (Auxiliaries commonly used in this field are generally antioxidants and lubricants. According to the actual addition, the addition amount should not exceed 0.3%, the same as the following examples.) Stir in a mixer for 5 minutes. The mixture is extruded and granulated in a twin-screw extruder at 190° C. to prepare a composite material, and then the composite material is extruded at 190° C. to form a low-temperature impact-resistant pipe.

Embodiment 2

[0035] Take 80kg random copolymerized polypropylene powder, 19.5kg block copolymerized polypropylene powder, 0.5g group IIa beta crystal nucleating agent (composite ratio of calcium stearate and pimelic acid 1:1), other processing Auxiliary, stir in the mixer for 5min. The mixture is extruded and granulated in a twin-screw extruder at 200°C to prepare a composite material, and then the composite material is extruded at 200°C to form a low-temperature impact-resistant pipe.

Embodiment 3

[0037] Take 70kg of random copolymerized polypropylene powder, 29kg of block copolymerized polypropylene powder, 1kg of lanthanide mononuclear metal compound β crystal form nucleating agent, and other processing aids, and stir in a mixer for 5 minutes. The mixture is extruded and granulated in a twin-screw extruder at 220°C to prepare a composite material, and then the composite material is extruded at 220°C to form a low-temperature impact-resistant pipe.

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

PropertyMeasurementUnit
melt flow indexaaaaaaaaaa
Login to view more

Abstract

The invention discloses a low-temperature impact resistance PP-R tubing and a preparation method thereof. The tubing is composed of following components in percentage by weight: 69 to 94.9% of random copolymerized polypropylene, 5 to 30% of polypropylene block copolymer (PPB), and 0.1 to 1.0% of beta-crystal nucleating agent. The preparation method comprises following steps: mixing random copolymerized polypropylene, block copolymerized polypropylene and beta-crystal nucleating agent according to the ratio mentioned above in a mixer for 2 to 5 minutes; subjecting the mixture to an extrusion granulation treatment by using a double screw extruder at the temperature of 170 to 220 DEG C, thus obtaining a composite material of PP-R/PP-B; then subjecting the composite material to an extrusion molding treatment, and obtaining the low-temperature impact resistance PP-R tubing. The PP-R tubing, which is prepared through mixing PP-R powder material and PP-B powder material and adding a certain amount of beta-crystal nucleating agent, has a prominent improved low-temperature impact resistance ability and good internal pressure resistance performance.

Description

technical field [0001] The invention belongs to the technical field of polypropylene piping systems for hot and cold water, and in particular relates to a low-temperature impact-resistant PP-R pipe and a preparation method thereof. Background technique [0002] The microstructure of a polymer plays a decisive role in its performance, and its main chain structure has the greatest influence on the rigidity and flexibility of the chain. For isotactic polypropylene (PP), in isotactic PP, the pendant methyl groups are in the same configuration and located on the same side of the polymer chain, and in the extended configuration, these groups strongly repel each other, by forming 3 1 Helical (that is, each helical cycle has 3 chemical repeating units), the methyl groups on the chain are as far away from each other as possible, which is the configuration with the smallest energy of the polymer. According to this regular repeated arrangement, isotactic PP has high crystallinity , p...

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
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L53/00C08K5/20C08K5/098C08K5/092C08K5/08C08K5/3437
Inventor 盛仲夷毛明忠谢松桂徐康马骥
Owner 杭州鸿雁管道系统科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap