Nonwoven articles and methods of making the same
A non-woven, non-woven fiber web technology, used in non-woven fabrics, textiles and papermaking, fiber processing, etc., can solve the problem of particle coating durability, damage and other problems
Active Publication Date: 2022-04-08
3M INNOVATIVE PROPERTIES CO
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Problems solved by technology
[0003] However, each of these techniques has disadvantages if a particle coating consisting essentially of inorganic particles is desired
For example, in this case, the presence of binder components in methods 1) and 3) would be unacceptable, and the durability of particle coatings produced by method 2 is often problematic because particle coatings Layers are often easily damaged by methods such as grinding with solvents and / or rinsing
Method used
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Examples
Experimental program
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Embodiment 1 to 11
[0065] Examples 1 to 11 (EX-1 to EX-11) and Comparative Example A (CEX-A)
[0066] CEX-A and EX-1 to EX-12 are graphite-coated PE nonwoven substrates prepared as described above. For CEX-A, substrates were not subjected to IPL and were control samples. EX-1 to EX-11 were prepared by subjecting the samples to intense pulsed light irradiation (IPL). In all IPL cases, the source used was an Xe flashlamp, commercially available from Xenon Corporation, Wilmington, Massachusetts, as a SINTERON S-2100Xe flashlamp equipped with a C-type bulb. Place the sample under the quartz plate used for the irradiation process.
[0067] For EX-1, at a pulse rate of 1Hz and 0.1J / cm 2 The energy density treats the substrate once. The substrate is then removed and turned over, and the process repeated on the backside of the substrate.
[0068] For EX-2, at a pulse rate of 1Hz and 0.1J / cm 2 The energy density treats the substrate 3 times. The substrate is then removed and turned over, and the...
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Abstract
The present invention discloses a method comprising exposing a coating of particles disposed on a nonwoven web comprising heat-softenable fibers to pulsed electromagnetic radiation having at least one wavelength in the range of 200 nm to 1000 nm. The particle coating comprises distinct particles which are not chemically bonded to each other and which are not retained in a binder material other than heat-softenable fibers. Nonwoven articles comprising a heat-softenable nonwoven web having a particulate coating disposed thereon are also disclosed. The particle coating comprises distinct particles that are not chemically bonded to each other and that are not retained in a binder material other than the heat-softenable nonwoven web. At least 60% of the particle coating remains after immersion in isopropanol for one minute at 22°C.
Description
technical field [0001] The present disclosure broadly relates to methods for improving the durability of particle coatings on nonwoven webs, and articles made thereby. Background technique [0002] Coatings of powders (eg, graphite) on nonwoven webs are well known; however, the powders are often loosely bound to the fibers and tend to fall off. Various methods have been devised to overcome this problem, including: 1) using a curable resin that is applied to the fiber prior to powder coating and that when cured firmly bonds the powder to the fiber; In those cases where the mesh is sufficiently durable, the powder can be rubbed onto it in a process known as triboadhesion; and 3) the powder can be chosen to contain a binder set that can fuse to the fibers when heated point. [0003] However, each of these techniques has disadvantages if a particle coating consisting essentially of inorganic particles is desired. For example, in this case, the presence of binder components in...
Claims
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IPC IPC(8): D04H1/407D04H1/58D04H13/00
CPCD04H1/407D04H1/5412D04H1/541D06M10/005D06M11/80
Inventor M·A·克赖顿E·S·戈纳尔R·P·约翰斯通M·A·普里奥洛J·A·格特舍尔
Owner 3M INNOVATIVE PROPERTIES CO