Nonwoven fabric sheet, and extraction-use filter and extraction-use bag using same

一种无纺布、纺粘无纺布的技术，应用在膜过滤器、固定式滤芯过滤器、过滤分离等方向，能够解决无法得到充分拉伸强度、热压接处理不完全、大密封强度等问题，达到透明性和提取性优异、形态保持性优异、大密封强度的效果

Active Publication Date: 2016-11-23
OHKI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to control the temperature in such a way that the ultrafine fibers are not softened excessively and the long fibers are bonded to each other, and part of the thermocompression bonding treatment becomes incomplete, and sufficient tensile strength cannot be obtained. As a result, it is difficult to obtain a large The sealing strength

Method used

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  • Nonwoven fabric sheet, and extraction-use filter and extraction-use bag using same
  • Nonwoven fabric sheet, and extraction-use filter and extraction-use bag using same
  • Nonwoven fabric sheet, and extraction-use filter and extraction-use bag using same

Examples

Experimental program
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Effect test

Embodiment 1

[0139] Using the spun-bonding method, the polyethylene terephthalate resin is heated and melted and spun out from a spinning nozzle with a diameter of 0.3 mm, stretched / fiber-opened with a jet at a spinning speed of 5000 m / min, and collected into a tape A web was formed on a type conveyor, and a partial thermocompression bonding process with a thermocompression bonding area ratio of 15% was performed to produce a spunbonded nonwoven fabric of the first layer. The weight per unit area of ​​gained spunbond nonwoven fabric is 12.0g / m 2 , The fiber diameter is 13.6 μm, the IV value of the resin is 0.71, the degree of crystallinity is 71%, the degree of crystal orientation is 85%, and the birefringence (Δn) is 0.080.

[0140] Next, on the surface of the spun-bonded non-woven fabric, a polyester resin having a terephthalic acid / isophthalic acid polymerization ratio of 86 / 14 as an acid component was used, and the temperature of the air stream was set to 370°C. The distance (DCD) fro...

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Abstract

The present invention provides a nonwoven fabric sheet used in an extraction-use filter, etc., with which it is possible to obtain great seal strength, and also provides an extraction-use filter, etc., manufactured using the nonwoven fabric sheet. Such a nonwoven fabric sheet is provided with: a first layer comprising a spun-bonded nonwoven fabric formed from fibers of a polyester-based resin in which the IV value is 0.60-1.00, the crystallinity is 30-80%, the crystalline orientation is 60-95%, and the birefringence ([Delta]n) is 0.040-0.100, the spun-bonded nonwoven fabric having a partial thermocompression bonding section in which the thermocompression bonding area rate is 5-30%; and a second layer comprising a melt-blown nonwoven fabric formed from fibers of a polyester-based resin blown onto the surface of the first layer and solidified to a crystallinity of 0-14%. The extraction-use filter, etc., are formed by placing the second layer of the nonwoven fabric on the inside and sealing a prescribed portion by fusion.

Description

technical field [0001] The present invention relates to a nonwoven fabric sheet, an extraction filter and an extraction bag (hereinafter, the extraction filter and the extraction bag are collectively referred to as "extraction filter, etc.") using the nonwoven fabric sheet as materials. Specifically, it relates to a nonwoven fabric sheet formed by laminating a meltblown nonwoven fabric on the surface of a spunbond nonwoven fabric, and an extraction filter formed by subjecting the nonwoven fabric sheet to processing such as cutting and sealing. . Background technique [0002] A nonwoven sheet made of two layers of spunbond nonwoven fabric and meltblown nonwoven fabric is generally strong and has excellent extractability, so it is suitable as a filter and bag material for extraction materials, such as filled / sealed with powdered coffee Drip bags, etc., tea bags filled / sealed with black tea, green tea, etc., soup bags filled / sealed with kelp, dried bonito flakes, etc., bath ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H3/16B65D77/00D04H1/4374D04H3/011B32B7/027
CPCD04H1/4374D04H3/011D04H3/16B65D85/808D04H1/54D04H1/56D04H3/14D04H1/435B32B7/027A47J31/06B65D77/00B32B7/05B32B1/00B01D11/02B01D29/111B01D29/27B01D39/163B01D2239/0622B01D2239/0627B01D2239/0672B01D2239/1233B32B5/022B32B5/26B32B2250/20B32B2262/0276B32B2307/726B32B2439/46D10B2505/04
Inventor 斋藤充范中室正宏山口南生子
Owner OHKI
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