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Bicomponent microfibers

A microfiber, dispersed technology, applied in textiles, bandages, transportation and packaging, etc., can solve the problems of high cost and high processing costs, and achieve the effect of easy manufacture

Inactive Publication Date: 2002-02-27
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In comparison, single-use medical products are typically sterilized or sterilized after use, before disposal to specially designated landfills or waste incinerators, which can significantly increase costs
Typically, disposal costs for contaminated single-use articles are quite high

Method used

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  • Bicomponent microfibers
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  • Bicomponent microfibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0110] A nonwoven web of multiple layers of microfibers was produced as follows:

[0111] The multilayer sprayed microfibrous webs of the present invention were made using the meltblowing process described in US Patent 5,207,970 (Joseph et al.). The method uses a meltblown die with round smooth surfaced holes (10 / cm) with a length / diameter ratio of 5 / 1.

[0112] Examples 1-29 and Comparative Examples C1-C8 were prepared with different formulations as listed in Table 1 below. The examples were prepared using two extruders at different temperatures and with die bodies at different temperatures, under certain conditions of air temperature, gap and collector distance. The temperature of each extruder, die body and air in °C and the gap and collector distance in centimeters for each example and comparative example are listed in Table 2 below.

[0113] The first extruder, having sections with temperatures listed in Table 2, fed the melt stream of Resin 1 for each Example listed in...

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Abstract

An alkali dispersible article comprises a sheath-core microfiber. The sheath layer comprises a hydrolytically degradable polymer, and the core layer comprises another polymer that is different than the sheath polymer. The core polymer may be a hydrolytically degradable polymer or more preferably a water soluble polymer.

Description

field of invention [0001] The present invention relates to membranes, composites and other compositions that can be made into articles that are disposed of under alkaline water conditions by dispersing into wastewater, and to products made from such compositions that are stable in use and dispersible in water Use of such articles as sheet material as a means of disposal. background of the invention [0002] Even though the amount of plastic used in various consumer goods, packaging, and medical products has not grown over the past two decades, it is still possible to see increasing amounts of non-degradable plastic filling landfills. Plastics offer many advantages over more traditional wood, glass, paper, and metal products, including improved performance, comparable or reduced manufacturing costs, reduced shipping costs, and more. Disposal of all waste, including food waste, packaging material, etc., into a typical landfill provides a more stable environment, none of which...

Claims

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Application Information

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IPC IPC(8): A61F13/15A61F5/44A61F5/445A61F13/49A61F13/551A61L15/26A61L15/62A61L17/12A61L17/14A61L31/10B09B3/00D01F8/04D01F8/10D01F8/14D04H1/42D04H1/56D04H13/00
CPCD04H1/565D01F8/14B09B3/00B09B3/0075A61L15/62D01F8/04D04H1/42A61L15/26A61L31/10A61L17/145D04H13/002A61L17/12D04H1/56Y10T428/2929Y10T442/622Y10T442/614Y10T442/641Y10T442/68D04H1/43828D04H1/43838C08L67/04
Inventor T·J·林奎斯特G·A·帕特诺德D·R·拉瑟福德D·施莱
Owner 3M INNOVATIVE PROPERTIES CO
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