Melt blown fiber

A technology of melt-blown fibers and fibers, which is applied in the directions of fiber processing, fiber chemical characteristics, melt spinning, etc., and can solve problems such as limited mechanical strength
CN102639769AActive Publication Date: 2012-08-15BOREALIS AG
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BOREALIS AG
Publication Date
2012-08-15

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Abstract

Melt-blown fiber having an average diameter of not more than 5.0 [mu]m, said fiber comprises at least 85 wt% of a propylene copolymer, wherein DEG said melt blown fiber and / or said propylene copolymer has / have a melt flow rate MFR2 (230 DEG C) measured according to ISO 1133 of at least 200 g / 10min, DEG said propylene copolymer has a comonomer content of 0.5 to 5.5 wt%, the comonmers are ethylene and / or at least one C4 to C20 a-olefin selected from the group consisting of 1-butene, 1-pentene, 1-hexene, 1-heptene, and 1-octene, DEG the propylene copolymer has 13C-spectroscopy, and DEG said melt blown fiber and / or said propylene copolymer fulfill(s) the equation (1).; wherein Tm [DEG C] is the melting temperature [given in DEG C] of melt blown fiber said and / or of said propylene copolymer measured according to ISO 11357-3, C2 [wt%] is the amount [given in weight percentage] of comonomers within said melt blown fiber and / or within said propylene copolymer determined with Fourier transform infrared spectroscopy (FTIR).
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Description

technical field

[0001] The present invention relates to a new meltblown web based on meltblown fibers comprising a propylene copolymer, and to products made from the meltblown web. Background technique

[0002] Meltblown webs having a nonwoven structure composed of meltblown fibers are typically made by a one-step process in which high velocity air blows molten thermoplastic resin from an extruder die to a conveyor or take-up screen. ) in order to form a fine fiber self-bonding web. While many types of polymers can be used for meltblown fibers and fabrics, polypropylene is one of the most commonly used polymers. Very low viscosity polypropylene homopolymers are typically used for the manufacture of meltblown fibers and webs. However, this polymer has limited mechanical strength. To overcome this problem, spunbonded fabrics are manufactured. The polypropylene fibers in spunbond fabrics are much thicker than meltblown fibers, so the total weight of spunbond fabrics is much...

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
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