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

Carbon fiber bundling sample and preparation method thereof

A sample preparation and carbon fiber technology, which is applied in the field of carbon fiber bundle samples and its preparation, can solve the problems of not being able to accurately determine the filling rate of carbon fibers, difficulty in achieving the accuracy of shape dimensions, and difficulty in penetrating carbon fiber bundles, etc., to ensure accuracy and repeatability, ease of analysis, and reduced interference

Pending Publication Date: 2019-06-07
BEIJING CENT FOR PHYSICAL & CHEM ANALYSIS
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] At present, the carbon fiber bundle samples are held by a cylindrical holder to hold the carbon fiber bundle, but there is a big problem with the use of a cylindrical holder, either the carbon fiber bundle is difficult to penetrate into the cylindrical holder, or the finished sample is not in shape. In terms of dimensional accuracy, it is difficult to meet the standards required by GB / T 22588-2008 and ASTM E1461-2013, the internal smoothness is insufficient, and the filling rate of carbon fiber cannot be accurately determined

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
  • Carbon fiber bundling sample and preparation method thereof
  • Carbon fiber bundling sample and preparation method thereof
  • Carbon fiber bundling sample and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] This embodiment provides a carbon fiber bundle sample, which uses two half-rings of the buckle to form a constraining ring to constrain the carbon fiber bundle, so that accurate bulk density and external dimensions can be obtained.

[0048] The carbon fiber bundle sample includes: a confinement ring and a carbon fiber bundle constrained inside the confinement ring.

[0049] Wherein the carbon fiber bundle is a cylindrical shape formed by parallel bundles of multiple axially parallel carbon fibers to be tested. Such as Figure 1-Figure 4 As shown, the confinement ring is formed by the butt joint of two buckle-shaped semicircular rings, the two semicircular rings are respectively the upper confinement ring 1 and the lower confinement ring 2, and the upper confinement ring 1 and the lower confinement ring 2 are butted to form a complete circle. The upper confinement ring 1 and the lower confinement ring 2 are connected in the form of a buckle at the joint, so that they ca...

Embodiment 2

[0052] The preparation process of the carbon fiber bundle sample in the above-mentioned embodiment 1 is:

[0053] (1) Calculate the mass M of the required carbon fiber

[0054] When the carbon fibers are bundled in the confinement ring as closely as possible, theoretically a maximum volume filling rate of 80% can be achieved, 50%-80% is more suitable, and a higher volume filling rate is preferred.

[0055] Select a bundle of carbon fibers to be tested with a mass of m and a length of L, and calculate the cross-sectional area S of a single carbon fiber by formula (1) according to the specific gravity ρ of the carbon fibers to be tested c :

[0056]

[0057] According to formula (2), according to the inner diameter D of the confinement ring, calculate the cross-sectional area S of the inner hole of the confinement ring y :

[0058]

[0059] The volume filling rate K is set, and the cross-sectional area S of the carbon fiber bundle with the volume filling rate K is obtai...

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
lengthaaaaaaaaaa
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a carbon fiber bundling sample and a preparation method thereof. Two semicircular rings in an opposite buckling manner form a constraint ring to restrain a carbon fiber bundle,so that the precise volume density and appearance dimension can be obtained. The carbon fiber bundling sample comprises a constraint ring and a carbon fiber bundle. The constraint ring includes an upper constraint ring and a lower constraint ring; the upper constraint ring and the lower constraint ring are two buckle type semicircular rings and form a full cycle after the butt joint. The cylindrical carbon fiber bundle is restrained in the constraint ring. When the carbon fiber bundling sample is prepared, the mass M of a needed carbon fiber is calculated, a to-be-tested carbon fiber with themass M is weighed, and axial parallel bundles form a cylindrical carbon fiber bundle; after straightening of the carbon fiber bundle, the upper constraint ring and the lower constraint ring are buckled respectively in two opposite directions of the outer circumference of the carbon fiber bundle to form the constraint ring, and the carbon fiber bundle is restrained in the constraint ring; and thenthe parts, extending out of the two ends of the constraint ring, of the carbon fiber bundle are cut off to obtain a carbon fiber bundling sample.

Description

technical field [0001] The invention relates to a sample and a preparation method thereof, in particular to a carbon fiber bundle sample and a preparation method thereof. Background technique [0002] Carbon fiber is known as one of the materials with the best comprehensive performance in the industry today. It is a new type of carbon material whose chemical composition contains more than 90% of the mass fraction of carbon elements. Carbon fiber and its modified composite materials have been widely used in many fields such as aerospace, machinery manufacturing, textile, chemical industry, civil engineering, medical and health, etc. Both the carbon fiber itself and its composite materials have great practical application value. [0003] Thermal conductivity is one of the important physical parameters for evaluating the thermal properties of carbon fibers. Accurate measurement of the axial thermal conductivity of carbon fibers has important guiding significance for the develo...

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): G01N1/28
Inventor 张裕祥高峡杨寅李琴梅刘伟丽汪雨赵新颖汤庆峰
Owner BEIJING CENT FOR PHYSICAL & CHEM ANALYSIS