Demolding breathable felt as well as preparation method and application thereof

A breathable felt and mold release technology, which is applied in textiles and papermaking, non-woven fabrics, fabric surface trimming, etc. Efficiency of use and the effect of preventing glue spillage

Pending Publication Date: 2021-07-30
SHANGHAI LEADGO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the air felt of the above two structures is combined with the tetrafluoroethylene film, the air permeability is greatly reduced, which affects its performance, and the cost of tetrafluoroethylene is high and the processing technology is complicated.

Method used

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  • Demolding breathable felt as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A method for preparing a release air felt, specifically comprising the steps of:

[0045] (1) the length is 60mm, the linear density is 4D, and the polypropylene fiber prepared by the melt spinning method is opened through an opener with a rotating speed of 80rpm to obtain bundled fibers;

[0046] (2) the bundle fiber that step (1) obtains is combed through the breast cylinder that frequency is 40Hz, the middle doffer that frequency is 20Hz, the main cylinder that frequency is 40Hz and the rear doffer that frequency is 20Hz, obtains reticular fiber;

[0047] (3) The mesh fiber obtained in step (2) is passed through a pre-punching machine with a frequency of 27 Hz, a first upper needle machine with a frequency of 33 Hz, a first lower needle machine with a frequency of 33 Hz, and a second needle machine with a frequency of 23 Hz. The upper needling machine and the second lower needling machine with a frequency of 23 Hz are processed to obtain the initial air felt;

[004...

Embodiment 2

[0050] A method for preparing a release air felt, specifically comprising the steps of:

[0051] (1) the length is 51mm, the linear density is 2.5D, and the polypropylene fiber prepared by the melt spinning method is opened by an opener with a rotating speed of 70rpm to obtain bundled fibers;

[0052] (2) the bundle fiber that step (1) obtains is combed through the breast cylinder that frequency is 35Hz, the middle doffer that frequency is 15Hz, the main cylinder that frequency is 35Hz and the rear doffer that frequency is 15Hz, obtains reticular fiber;

[0053] (3) The mesh fiber obtained in step (2) is passed through a pre-punching machine with a frequency of 25 Hz, a first upper needle machine with a frequency of 30 Hz, a first lower needle machine with a frequency of 30 Hz, and a second needle machine with a frequency of 20 Hz. The upper needling machine and the second lower needling machine with a frequency of 20 Hz are processed to obtain the initial air felt;

[0054] ...

Embodiment 3

[0056] A method for preparing a release air felt, specifically comprising the steps of:

[0057] (1) the length is 76mm, the linear density is 6D, and the polypropylene fiber prepared by the melt spinning method is opened by an opener with a rotating speed of 100rpm to obtain bundled fibers;

[0058] (2) the bundle fiber that step (1) obtains is combed through the breast cylinder that frequency is 50Hz, the middle doffer that frequency is 35Hz, the main cylinder that frequency is 50Hz and the rear doffer that frequency is 35Hz, obtains reticular fiber;

[0059] (3) The reticular fiber obtained in step (2) is passed through a pre-punching machine with a frequency of 30 Hz, a first upper needle machine with a frequency of 35 Hz, a first lower needle machine with a frequency of 35 Hz, and a second needle machine with a frequency of 25 Hz. The upper needling machine and the second lower needling machine with a frequency of 25 Hz are processed to obtain the initial air felt;

[00...

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Abstract

The invention provides a demolding breathable felt as well as a preparation method and application thereof. The preparation method of the demolding breathable felt comprises the following steps of opening, carding and needling polypropylene fibers in sequence to obtain an initial breathable felt; and finally, performing single-face ironing on the obtained initial breathable felt to obtain the demolding breathable felt. The surface of the demolding breathable felt obtained after single-face ironing is smoother, the polypropylene fibers on the surface can be effectively prevented from falling off when the demolding breathable felt is applied, meanwhile, glue can be prevented from overflowing, and the demolding breathable felt has important research value.

Description

technical field [0001] The invention belongs to the technical field of air felt, and in particular relates to a release air felt and a preparation method and application thereof. Background technique [0002] In order to make the film surface incompatible with composite materials, some vacuum auxiliary materials are generally set on the film surface to achieve this effect. Air felt is one of the vacuum auxiliary materials for autoclave forming composite materials. At present, most air felts have two shortcomings. On the one hand, the air permeability performance is not good, and the phenomenon of shedding often occurs, which is easy to stick to the surface of the product attached to the air felt, causing the product to be scrapped; on the other hand, due to The characteristics of the air felt itself are easy to absorb resin, which will cause a lack of glue in the composite material, resulting in a decrease in the strength of the composite material. [0003] How to solve the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4291D04H1/46D06C15/00
CPCD04H1/4291D04H1/46D06C15/00
Inventor 胡仲杰于国星岑婵芳胡潇
Owner SHANGHAI LEADGO TECH
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