CN211105981U

CN211105981U - Polyether-ether-ketone thin-walled tube with good pressure resistance

Info

Publication number: CN211105981U
Application number: CN201921637304.3U
Authority: CN
Inventors: 张森; 周君; 刘建; 徐桎琳
Original assignee: Suzhou Houying New Material Co ltd
Current assignee: Suzhou Houying New Material Co ltd
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2020-07-28
Anticipated expiration: 2029-09-29

Abstract

The utility model relates to a polyether ether ketone thin wall pipe that compressive property is good, including inlayer, intermediate level and skin, the intermediate level is made by the modified polyether ether ketone of carbon fiber cloth reinforcing, carbon fiber cloth in the intermediate level weaves plain weave single layer cloth for the carbon fiber tow, and carbon fiber cloth's weft direction is parallel with the circumferencial direction, and this polyether ether ketone thin wall pipe that compressive property is good, through weaving into plain weave cloth to the carbon fiber, and its weft is parallel with the circumferencial direction, enters into the polyether ether ketone fuse-element and the solidification back when carbon fiber cloth, just can form the material of 2 dimension reinforcing, and wherein weft's inseparable range can strengthen the compressive capacity of thin wall pipe by a wide margin to make the intensity of this thin wall pipe can rise to about 2000MPa, be greater than pure polyether ether ketone.

Description

Polyether-ether-ketone thin-walled tube with good pressure resistance

Technical Field

The utility model relates to a polyether ether ketone thin wall pipe production field, in particular to polyether ether ketone thin wall pipe that compressive property is good.

Background

The thin-walled tube is a tube with an outer diameter to wall thickness ratio greater than 20. The high-pressure pneumatic conveying device has the advantages of light weight, high cost performance and convenience in construction, and is widely applied to conveying of home decoration pipelines, sewage pipes, rainwater pipes, pumped water, hydraulic systems, chemical pipelines, compressed air and high-pressure gas.

The thin-wall pipe made of the general plastic can be only used in a low-end scene, and the pressure resistance level of the thin-wall pipe is between 0.1 and 1MPa because the general plastic has low strength. The Polyetheretherketone (PEEK) material has excellent chemical corrosion resistance, flame retardance, micromolecule precipitation, high temperature resistance and long service life at high temperature, so that the PEEK material is widely applied to some severe scenes and the conditions with extremely high requirement on the service life. Although the mechanical property of PEEK is 2-5 times of that of general-purpose plastics, the pressure-resistant grade of a thin-wall pipe prepared from the PEEK is usually 1-2MPa, and the PEEK cannot meet the requirement of conveying ultrahigh-pressure liquid with the liquid pressure exceeding 2 MPa.

Therefore, it is necessary to provide a thin-walled tube of polyetheretherketone having good pressure resistance to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a polyether ether ketone thin wall pipe that compressive property is good, and withstand voltage grade is high, and has better corrosion resisting property.

The utility model provides a technical scheme that its technical problem adopted is: the thin-walled tube of polyetheretherketone with good pressure resistance comprises an inner layer, a middle layer and an outer layer, wherein the middle layer is made of modified polyetheretherketone reinforced by carbon fiber cloth;

the carbon fiber cloth in the middle layer is plain single-layer cloth woven by carbon fiber tows, and the weft direction of the carbon fiber cloth is parallel to the circumferential direction.

Specifically, the inner layer and the outer layer are pure polyether-ether-ketone layers.

Specifically, the thickness ratio of the inner layer to the intermediate layer to the outer layer is 1:1: 1.

Specifically, the specification of the tows of the carbon fiber cloth is selected according to the outer diameter of the thin-walled tube: the selection of the external diameter is 1K-sized tows from 20-60, the selection of the external diameter is 3K-sized tows from 60-100, the selection of the external diameter is 6K-sized tows from 100-140, and the selection of the external diameter is 12K-sized tows above 140.

The utility model relates to a polyether ether ketone thin wall pipe that pressure resistance is good's beneficial effect is, through weaving into plain weave cloth to the carbon fiber, its weft is parallel with the circumferencial direction, enters into the polyether ether ketone fuse-element and the solidification back when carbon fiber cloth, just can form the material of 2 dimension reinforcing, wherein the inseparable range of weft can strengthen the pressure resistance of thin wall pipe by a wide margin to make the intensity of this thin wall pipe can rise to about 2000MPa, be far away from the intensity of pure polyether ether ketone.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic structural diagram of a PEEK thin-walled tube with good pressure resistance of the present invention;

in the figure: 1. inner layer, 2 intermediate layer, 3 outer layer.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 1, the polyetheretherketone thin-wall pipe with good pressure resistance comprises an inner layer 1, an intermediate layer 2 and an outer layer 3, wherein the intermediate layer 2 is made of carbon fiber cloth reinforced modified polyetheretherketone;

the carbon fiber cloth in the middle layer 2 is plain single-layer cloth woven by carbon fiber tows, and the weft direction of the carbon fiber cloth is parallel to the circumferential direction. In the thin-walled tube, the main stress-bearing direction is along the circumferential direction. Therefore, the weft direction of the carbon fiber cloth is parallel to the circumferential direction, and the mechanical strength of the PEEK thin-walled tube in the circumferential direction can be greatly improved.

Specifically, the inner layer 1 and the outer layer 3 are pure polyetheretherketone layers. The pure material polyetheretherketone layer has good corrosion resistance, so that the polyetheretherketone thin-wall pipe can convey highly corrosive liquid.

Specifically, the thickness ratio of the inner layer 1, the middle layer 2 and the outer layer 3 is 1:1: 1.

The polyether-ether-ketone thin-wall pipe with good pressure resistance has the working principle that: the carbon fiber cloth is formed by weaving carbon fiber tows through an online horizontal circular weaving machine. The extruder is installed through the center of a main rotary table of the circular weaving machine, carbon fiber warp enters a sizing die through a channel with an air auxiliary device, the carbon fiber warp is fixed on a traction rod after penetrating out, the circular weaving machine weaves carbon fiber tows into a cylindrical cloth with specific requirements, and the cylindrical cloth is sent into a melt in the sizing die through an active roller; the gas auxiliary device with the heating function blows gas with the temperature of 400 ℃ into the carbon fiber cloth channel, so that the melt is prevented from flowing back into the channel; after the melt is infiltrated into the carbon fiber cloth, the carbon fiber cloth enters a cooling area to be solidified and formed into a thin-walled tube with high pressure-resistant grade. By weaving carbon fibers into plain cloth, the weft of the plain cloth is parallel to the circumferential direction, and after entering a PEEK melt and being solidified, the plain cloth can form a 2-dimensional reinforced material, wherein the compact arrangement of the weft can greatly enhance the pressure resistance of the thin-walled tube.

Compared with the prior art, the thin-walled tube of the polyetheretherketone with good pressure resistance is prepared by weaving carbon fibers into plain cloth, wherein the weft of the plain cloth is parallel to the circumferential direction, and the carbon fiber cloth can form a 2-dimensional reinforced material after entering a polyetheretherketone melt and being solidified, wherein the compact arrangement of the weft can greatly enhance the pressure resistance of the thin-walled tube, so that the strength of the thin-walled tube can be increased to about 2000MPa and is far greater than that of pure polyetheretherketone.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The thin-walled tube of polyetheretherketone with good pressure resistance is characterized by comprising an inner layer, a middle layer and an outer layer, wherein the middle layer is made of modified polyetheretherketone reinforced by carbon fiber cloth;

2. The thin-walled tube of polyetheretherketone having good pressure resistance of claim 1, wherein the inner layer and the outer layer are pure polyetheretherketone layers.

3. The polyetheretherketone thin-walled tube with good pressure resistance of claim 1, wherein the thickness ratio of the inner layer, the middle layer and the outer layer is 1:1: 1.

4. The polyetheretherketone thin-walled tube with good pressure resistance of claim 1, wherein the specification of the tows of the carbon fiber cloth is selected according to the outer diameter of the thin-walled tube: the selection of the external diameter is 1K-sized tows from 20-60, the selection of the external diameter is 3K-sized tows from 60-100, the selection of the external diameter is 6K-sized tows from 100-140, and the selection of the external diameter is 12K-sized tows above 140.