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A non-woven composite material with asymmetric transmission and its preparation method

A non-woven material, asymmetric transmission technology, applied in the directions of non-woven fabrics, textiles and papermaking, can solve the problems of not being able to serve the comfort of absorbent hygiene products well, and achieve fast horizontal diffusion speed, thin thickness, gram small effect

Active Publication Date: 2020-07-17
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention proposes a non-woven composite material with asymmetric transmission and its preparation method, which solves the problem that the asymmetric liquid transmission of the existing hot air material for diversion cannot better serve the comfort of absorbent sanitary products

Method used

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  • A non-woven composite material with asymmetric transmission and its preparation method
  • A non-woven composite material with asymmetric transmission and its preparation method

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Effect test

Embodiment 1

[0024] A method for preparing a non-woven composite material with asymmetric transmission in this embodiment, the steps are:

[0025] (1) The preparation of the vertical permeable layer will contain hot-melt fiber ES fiber, the mixing ratio of ES fiber is 60%; the fiber fineness is 1.5 denier, and the fiber length is 51mm. It is carded into a web by dry method (for the specific process, refer to Chapter 3, (Short Fiber Web Forming Process and Principle) and Chapter 6, (Thermal Bonding Process and Principle) of "Nonwovens" for the specific process, and it is made into a gram after drying with hot air. Weight 12g / m 2 The non-woven material is then controlled to a thickness of 5 mm with rolls, and the temperature of the rolls is 90°C.

[0026] (2) The online composite process is adopted, and the hot air nonwoven fabric reaches the bottom of the spinneret hole of the meltblown die head by using the conveying curtain.

[0027] (3) For the preparation of the horizontal diffusion l...

Embodiment 2

[0030] A method for preparing a non-woven composite material with asymmetric transmission in this embodiment, the steps are:

[0031] (1) The preparation of the vertical permeable layer will contain hot-melt fiber PE / PP sheath-core fiber, the mixing ratio of PE / PP sheath-core fiber is 60%, and the fiber of the PEG / PP melt-blown ultrafine fiber material The diameter distribution is below 800nm, 800-2000nm and above 2000nm. The number of fibers in the three distributions is counted as 100 parts, of which the number of fibers below 800nm ​​is 10 parts, the number of fibers above 2000nm is 18 parts, and the balance is 800-2000nm in diameter. of fiber. The fiber fineness is 1.5 denier, and the fiber length is 51 mm. Combed into a net by dry method, and dried with hot air to make a grammage of 17g / m 2 The non-woven material is then controlled to a thickness of 5mm with a roller, and the temperature of the roller is 100°C.

[0032] (2) The online composite process is adopted, and ...

Embodiment 3

[0036] A method for preparing a non-woven composite material with asymmetric transmission in this embodiment, the steps are:

[0037] (1) The preparation of the vertical permeable layer will contain hot-melt fiber PE / PP sheath-core fiber, the mixing ratio of PE / PP sheath-core fiber is 60%, and the fiber of the PEG / PP melt-blown ultrafine fiber material The diameter distribution is below 800nm, 800-2000nm and above 2000nm. The number of fibers in the three distributions is counted as 100 parts, of which the number of fibers below 800nm ​​is 10 parts, the number of fibers above 2000nm is 42 parts, and the balance is 800-2000nm in diameter. The fiber; the fiber fineness is 1.5 denier, and the fiber length is 51mm. Use dry carding to form a web (for the specific process, refer to "Nonwovens" Chapter 3 Short Fiber Web Forming Process and Principle and Chapter 6 Thermal Bonding Process and Principle, which will not be introduced too much here), after hot air drying. Gram weight 17g...

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Abstract

The inVention relates to the field of non-woVen composite materials, in particular to a non-woVen composite material achieVing asymmetric-transmission and a preparation method thereof. The non-woVen composite material comprises a horizontal diffusion layer and a Vertical permeable layer from top to bottom, the horizontal diffusion layer is prepared from a PEG / PP melt-blown superfine fiber materialof a horizontal branch structure, and the Vertical permeable layer is prepared from a hot-blast non-woVen material. The non-woVen composite material achieVing asymmetric-transmission comprises the Vertical permeable layer and the horizontal diffusion layer which are sequentially oVerlaid, composited and solidified, has the adVantages of being small in gram, thin in depth, rapid in horizontal diffusion speed, flexible and soft, and is particularly suitable for absorptiVe sanitary products such as diapers and sanitary towels.

Description

technical field [0001] The invention relates to the field of non-woven composite materials, in particular to a non-woven composite material with asymmetric transmission and a preparation method thereof. Background technique [0002] In the field of medical and health care, hot-air nonwovens can replace traditional wood pulp products for the diversion of absorbent sanitary products, so as to guide the rapid spread of liquid horizontally, increase the effective absorption area, reduce liquid rewet, keep dry, and give wear or comfort. The main reason is that the horizontal diffusion and vertical penetration of liquid in the air-through nonwoven material has a certain asymmetry, that is, the liquid diffuses rapidly in the horizontal direction to weaken the vertical penetration in the thickness direction. Considering that a single web structure is difficult to expand the speed difference between liquid horizontal diffusion and vertical permeation, a composite web structure was p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H5/10D04H5/00D04H5/06
CPCD04H5/00D04H5/10
Inventor 张恒甄琪申亚柯聂卫娟柳洋章伟张一风闫新刘让同
Owner ZHONGYUAN ENGINEERING COLLEGE
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