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Sea-island fiber for thermoformed non-woven fabric and preparation method of sea-island fiber

A sea-island fiber and non-woven fabric technology, which is applied in stretch spinning, fiber treatment, filament/thread forming, etc., can solve the problems of fiber physical properties, poor stiffness of adhesive non-woven fabrics, etc., and achieve excellent thermal Adhesiveness, good stiffness, and excellent tensile fracture performance

Active Publication Date: 2021-04-16
江苏华峰超纤材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to develop the sea-island fibers of thermoformed non-woven fabrics to replace traditional ES fibers, solve the problems of fiber physical properties, adhesiveness and poor stiffness of subsequent non-woven fabrics in the prior art, and provide a A method for preparing sea-island fibers for thermoforming nonwoven fabrics, comprising composite spinning, stretching, crimping, drying and setting, and cutting to obtain short fibers with sea-island structures for thermoforming nonwoven fabrics

Method used

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  • Sea-island fiber for thermoformed non-woven fabric and preparation method of sea-island fiber
  • Sea-island fiber for thermoformed non-woven fabric and preparation method of sea-island fiber
  • Sea-island fiber for thermoformed non-woven fabric and preparation method of sea-island fiber

Examples

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Embodiment 1

[0061] A method for preparing sea-island fibers for thermoforming non-woven fabrics, comprising the following steps:

[0062] (1) Prepare island-in-the-sea fibers with a fixed island structure by composite spinning;

[0063] Raw material weight ratio is:

[0064] Outer ring island component: linear low density polyethylene with a melting point of 120°C;

[0065] Inner ring island component: nylon;

[0066] Sea component: low-density polyethylene with a melting point of 105°C;

[0067] The mass ratio of the island component and the sea component is 50:50, the outer ring island component accounts for 15wt% of the total island component, and the inner ring island component accounts for 85wt% of the total island component content;

[0068] The composite spinning process parameters are:

[0069] Spinning temperature: The temperature of the spinning screw feed zone of the sea component is 100°C, the temperature of the conveying zone is 140°C, the temperature of the melting zone ...

Embodiment 2

[0075] A method for preparing sea-island fibers for thermoforming nonwoven fabrics, comprising the following steps:

[0076] (1) Prepare island-in-the-sea fibers with a fixed island structure by composite spinning;

[0077] The weight ratio of raw materials is: the mass ratio of island component to sea component (low-density polyethylene with a melting point of 115°C) is 75:25, and the outer ring island component (linear low-density polyethylene with a melting point of 125°C) accounts for the total 5wt% of the island component; the inner ring island component accounts for 95wt% of the total island component content; the first ring inner ring island (polyester) contains PE-g-MAH (content is 2wt%); the second ring The roundabout (polyester) does not contain PE-g-MAH; the third inner roundabout (polyester) does not contain PE-g-MAH; the fourth inner roundabout (polyester) does not contain PE-g-MAH;

[0078] The composite spinning process parameters are:

[0079] Spinning temperat...

Embodiment 3

[0085] A method for preparing sea-island fibers for thermoforming non-woven fabrics, comprising the following steps:

[0086] (1) Prepare island-in-the-sea fibers with a fixed island structure by composite spinning;

[0087] The weight ratio of raw materials is: the mass ratio of island component to sea component (low-density polyethylene with a melting point of 105°C) is 65:35, and the outer ring island component (linear low-density polyethylene with a melting point of 125°C) accounts for the total 10wt% of the island component; the inner ring island component accounts for 90wt% of the total island component content; the first ring inner ring island (nylon) contains PE-g-MAH (content is 5wt%); the second ring inner ring island (Nylon) contains PE-g-MAH (the content is 5wt%); the third inner ring island (Nylon) does not contain PE-g-MAH;

[0088] The composite spinning process parameters are:

[0089] Spinning temperature: The temperature of the spinning screw feed zone of t...

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Abstract

The invention relates to a sea-island fiber for thermoformed non-woven fabric and a preparation method of the sea-island fiber. The sea-island fiber is of a fixed island structure; fixed islands are annularly and uniformly distributed in a sea phase; the fixed island structure is composed of a circle of outer circular islands and 1-4 circles of inner circular islands; the outer circular island component is linear low density polyethylene, and the main component of the inner circular islands is polyester or nylon; and the diameter of the outer circular islands is smaller than or equal to that of the inner circular islands, and a gap between every two adjacent outer circular islands is smaller than that of the corresponding inner circular islands. The preparation method comprises the following steps of (1) preparing sea-island fibers with the fixed island structure by adopting composite spinning; and (2) carrying out first water bath drafting on the sea-island fibers prepared in the step (1), then carrying out second oil bath drafting, then feeding into a crimping machine, crimping fiber bundles, then drying and shaping, and finally cutting off and packaging to obtain the sea-island fibers for the thermoformed non-woven fabric. The sea-island fiber for the thermoforming non-woven fabric prepared by the method has excellent mechanical properties, the breaking strength reaches 3.00-4.00 cN / dtex, and the elongation is 60-90% and is far higher than that of the conventional sheath-core ES fiber.

Description

technical field [0001] The invention belongs to the technical field of sea-island fibers and relates to sea-island fibers for thermoforming nonwoven fabrics and a preparation method thereof. Background technique [0002] Thermoforming non-woven fabrics such as hot-air bonding can obtain soft and fluffy non-woven fabrics, hot-rolled bonding can obtain high-strength non-woven fabrics, etc., which are widely used in the production of sanitary materials, filter materials, thermal insulation fillers and other products. Mainly play the role of support layer. [0003] At present, thermoforming non-woven fabrics generally use sheath-core fibers. This type of sheath-core fiber is composed of two components along the fiber axis, of which the low-melting point component is the skin, and the high-melting point component is the core; such as the market Commonly used ES (Ethylene-Propylene Side By Side) fibers were first developed by Nippon Suzu Corporation. Most of them use PE as the sk...

Claims

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Application Information

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IPC IPC(8): D01D5/36D01D5/14D01D1/04D01F8/06D01F8/12D01F8/14D04H1/541
Inventor 杨艳彪符浩孙向浩胡锦文
Owner 江苏华峰超纤材料有限公司
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