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Melt-blown nonwoven fabrics and composites thereof

A non-woven material, melt-blown technology, applied in the direction of non-woven fabrics, textiles, papermaking, and other household appliances, can solve problems such as poor adhesion, poor adhesive strength, and polypropylene cannot be melted normally

Pending Publication Date: 2022-03-01
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Melting temperature differences and incompatibility between polyethylene and polypropylene can lead to poor bonding between the layers, as polyethylene may tend to "escape" the bond point when higher polypropylene melting temperatures are used, At the lower melting temperature of polyethylene, polypropylene cannot be melted normally
Therefore, it may lead to poor bond strength in SMS composite structures

Method used

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  • Melt-blown nonwoven fabrics and composites thereof
  • Melt-blown nonwoven fabrics and composites thereof
  • Melt-blown nonwoven fabrics and composites thereof

Examples

Experimental program
Comparison scheme
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example

[0095] Material

[0096] Polymer 1 (Poly.1) is polypropylene homopolymer (Borflow TM HL512FB), obtained from Borealis AG (Vienna, Austria), melting point 158° C. (ISO 11357-3), melt flow rate (MFR) 1200 g / 10 minutes (ISO 1133, 230 °C, 2.16kg). Additional properties of the polymers are provided in the table below.

[0097] Polymer 2 (Poly. 2) is an ethylene / α-olefin interpolymer available as DNDA 1082 NT7 from The Dow Chemical Company (Midland, Mich.). Additional properties of the polymers are provided in the table below.

[0098] Production of the polymers of the invention

[0099] The inventive ethylene / α-olefin interpolymers were prepared according to the following procedure and based on the reaction conditions reported in Tables 1 and 2.

[0100] All starting materials (monomer and comonomer) and process solvent (narrow boiling range high purity isoparaffinic solvent, Isopar-E) were purified with molecular sieves before introduction into the reaction environment. ...

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Abstract

A meltblown nonwoven material formed from bicomponent fibers wherein: the bicomponent fibers have a first region and a second region, the first region being formed from a first composition comprising at least 75 wt.% polypropylene; the second region is formed from a second composition comprising at least 75 wt.% of an ethylene / alpha-olefin interpolymer.

Description

technical field [0001] Embodiments of the present disclosure generally relate to meltblown nonwovens formed from bicomponent fibers and composite structures thereof. Background technique [0002] Nonwovens (NW) are cloth-like materials made of filaments gathered together by different bonding techniques (eg, spunbond or meltblown processes). These nonwoven fabrics can be used in hygiene and / or medical applications such as disposable absorbent articles including diapers, wipes, feminine hygiene products and adult incontinence products. In such applications, spunbond meltblown spunbond (SMS) composite structures are becoming increasingly popular. [0003] Spunbond layers have historically been formed from polypropylene monocomponent fibers due to their mechanical properties. One of the main disadvantages of polypropylene is its lack of flexibility. Softness can be solved by introducing polyethylene (PE). Spunbond layers are increasingly formed from bicomponent fibers with a...

Claims

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Application Information

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IPC IPC(8): D04H3/147D04H3/007D04H3/14
CPCD04H3/147D04H3/007D04H3/14D04H3/16D04H1/4291D04H1/541D04H1/5412D04H1/43825B32B5/022B32B5/08B32B5/26D04H1/56B32B2250/20B32B2250/40B32B2250/03B32B2250/04B32B2250/05B32B2262/0253B32B2262/12B32B2555/02A61F13/15577A61F2013/15552A61F2013/15959A61F2013/15967D04H1/4391D04H1/724D04H3/018D04H3/03D10B2509/02
Inventor A·斯托伊科维奇E·阿尔瓦雷斯林倚剑
Owner DOW GLOBAL TECH LLC