Unlock instant, AI-driven research and patent intelligence for your innovation.

Extrusion method of multi-layer water supply pipeline

A technology for water supply pipes and pipes, which is applied in the direction of tubular objects, other household appliances, household appliances, etc., and can solve the problems of harmful substances entering, poor bending modulus and pressure bearing capacity of PP-R water supply pipes, and affecting human health, etc. Achieve the effects of improving pressure bearing capacity, reducing light transmittance, and increasing flexural modulus

Active Publication Date: 2019-08-02
重庆鸽牌电工材料有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned patent also has the following technical problems: 1. When the colored PP-R water supply pipe is made by the above method, there are still some harmful substances in the components of the colored PP-R water supply pipe; especially when the PP-R water supply pipe is used as the water supply pipe When the pipe is used, its inner wall is immersed in water for a long time, and harmful substances will inevitably enter the running water, which will affect human health; 2. The bending modulus and pressure bearing capacity of the existing PP-R water supply pipe are not good

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
  • Extrusion method of multi-layer water supply pipeline
  • Extrusion method of multi-layer water supply pipeline
  • Extrusion method of multi-layer water supply pipeline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The extrusion method of multi-layer water supply pipeline, the steps are as follows:

[0037]Step 1: Take the colorless and transparent PP-R masterbatch as the inner layer masterbatch; take the PP-R masterbatch modified by the composite glass fiber as the middle layer masterbatch, and the mass percentage of the composite glass fiber and the middle layer masterbatch is 5% (that is: the amount of composite glass fiber in this plan is the mass percentage of the PP-R masterbatch after composite glass fiber modification); take colorless transparent PP-R masterbatch and red color masterbatch to form Outer layer masterbatch, the mass percentage of red color masterbatch and outer layer masterbatch is 2% ~ 4% The mass percent of the total material); the viscosity of the colorless and transparent PP-R masterbatch of the inner layer masterbatch and the outer layer masterbatch is greater than the viscosity of the modified PP-R masterbatch of the middle layer masterbatch.

[0038] ...

Embodiment 2

[0049] The difference between this embodiment and Embodiment 1 is that, in order to further facilitate the forming of the pipeline, a ventilation hole communicating with the outside world is also provided on the splitter bracket 6; At the same time, the outer layer masterbatch will be bifurcated at the splitter bracket 6 and then merged. At this time, the air in the vent hole will enter from the vent hole, so that the outer layer masterbatch can form a hollow cylinder.

[0050] Due to the different colors of the color masterbatch, its composition is different. Now take the active ingredients in the red color masterbatch as an example (sunfast red, Chinese nickname: C.I. pigment red; chemical category: monoazo lake; molecular formula: C 18 h 11 ClN 2 o 6 SBa; Molecular Weight: 556.16); Although the heat resistance of red color masterbatch can reach 200-240°C / 5min, the decomposition and aging of substances are carried out all the time, and its decomposition can produce substan...

Embodiment 3

[0060] Compared with Comparative Example 3, it can be seen that when the composite glass fiber content of the pipeline intermediate layer masterbatch exceeds 10%, the pipeline intermediate layer is too hard, and when embedded in the wall, the pipeline is not easy to bend, which is not conducive to the embedding of the pipeline; If it is forced to bend during burying, the pipeline will be easily damaged.

[0061] Comparing Example 1 with Comparative Example 4, it can be seen that when no red masterbatch is added to the outer masterbatch of the pipeline, the light transmission of the pipeline is relatively high, moss is easy to grow in the pipeline, and the service life of the pipeline is short.

[0062] Comparing Example 1 with Comparative Example 5, it can be seen that when the thickness of the inner layer of the pipeline accounts for less than 10% of the overall wall thickness of the pipeline, the thickness of the inner layer of the pipeline is too small, the inner layer is ea...

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

No PUM Login to View More

Abstract

The invention belongs to the technical field of extrusion forming and particularly relates to an extrusion method for a multilayer water supply pipeline. The extrusion method comprises the steps that firstly, a colourless transparent PP-R master batch is used as an inner layer master batch, a PP-R master batch modified with 5%-10% composite fiberglass is used as an interlayer master batch, and a colourless transparent PP-R master batch and a 2%-4% color master batch are taken and mixed to form an outer layer master batch; secondly, the inner layer master batch, the interlayer master batch and the outer layer master batch are subjected to extrusion molding through three extruders correspondingly, and an inner layer material, an interlayer material and an outer layer material are formed; thirdly, the inner layer material, the interlayer material and the outer layer material obtained in the step two are subjected to multilayer coextrusion through a composite die, and a pipeline blank is formed; and fourthly, the pipeline blank obtained in the step three is subjected to sizing molding through a vacuum sizing box, a molded pipeline is formed and enters a submerging type water tank, a cold spraying box is added finally, and the pipeline is cooled and cut. According to the scheme, harmful substances entering water can be reduced under the condition that the colors of the outer wall of the PP-R water supply pipeline are reserved, and meanwhile, the flexural modulus and loading capacity of the pipeline can be improved.

Description

technical field [0001] The invention belongs to the technical field of extrusion molding, and in particular relates to an extrusion method of a multilayer water supply pipeline. Background technique [0002] PP-R pipe is also called three-type polypropylene pipe or PPR pipe. It has the advantages of energy saving and material saving, environmental protection, light weight and high strength, corrosion resistance, smooth inner wall without scaling, easy construction and maintenance, and long service life. It is widely used in construction Water supply and drainage, urban and rural water supply and drainage, city gas, electric power and optical cable sheathing, industrial fluid transportation, construction, municipal, industrial and agricultural fields. [0003] The PP-R pipes sold on the market are mainly white, gray, green and curry. The main reason for this difference is the difference in the color masterbatch added; Get the desired color. At present, the water supply pipe...

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 Patents(China)
IPC IPC(8): B29C48/09B29C48/18B29C48/25B29C48/32B29C48/49B29K23/00B29L9/00B29L23/00
CPCB29C48/09B29C48/18B29C48/30B29C48/32B29C48/49B29C48/509B29K2023/14B29L2009/00B29L2023/22
Inventor 徐涪灵陈舰
Owner 重庆鸽牌电工材料有限公司