摘要:
There is provided a surge material for personal care products with a first creased layer and at least a second layer, where the layers are in face-to-face relation to one another and bonded together. The first has creases with a depth of between 0.25 and 2 mm and a frequency of between 5 and 100 per centimeter in the cross-machine and the second layer may have densities of between 0.01 and 0.05 g/cc and a basis weight between 25 and 250 gsm.
摘要:
There is disclosed an nonwoven fabric suitable for use as, for example, an intake/distribution material for personal care products, made from nonwoven fabric where the fabric is made from directly formed, mixed size fibers. The fibers may be conjugate fibers. The fabric may have zones having larger fibers and zones having smaller fibers providing a means to vary the web properties, such as permeability, or the mixed size fibers may be uniformly distributed. The fibers may also be crimped. The process for making such a material is also disclosed.A zoned fiber fabric can provide rapid intake of an insult because of the placement of the high permeability zone in the insult target area and can also provide good distribution through the lower permeability but higher capillarity end zones.
摘要:
An improved nonwoven web composite is formed by combining splittable bicomponent thermoplastic filaments with a component selected from other fibers and particles. The bicomponent filaments include distinct regions of first and second incompatible polymers extending the length of the filaments. After the bicomponent filaments are combined with the other fibers and/or particles, the bicomponent filaments are caused to split lengthwise along boundaries between the regions of different polymers, resulting in a web or matrix of finer filaments which entrap, ensnare and contain the other fibers and/or particles within the web or matrix. The nonwoven web composite is particularly useful for making absorbent articles, which require durability and optimum levels of absorbent fibers and/or particles.
摘要:
An improved nonwoven web composite is formed by combining bicomponent thermoplastic filaments having adhesive properties with a component selected from other fibers and particles. The bicomponent filaments include distinct regions of first and second incompatible polymers across a cross-section of individual filaments. After the bicomponent filaments are combined with the other fibers and/or particles, the adhesive properties of the bicomponent filaments result in a web or matrix of filaments having improved ability to entrap, ensnare and contain the other fibers and/or particles within the web or matrix. The nonwoven web composite is particularly useful for making absorbent articles, which require stability and optimum levels of absorbent fibers and/or particles.
摘要:
A zoned hot air knife assembly and process include a plurality of discrete, spaced apart air knives is useful for the inter-filament bonding of nonwoven webs, for the thermal bonding of laminates including nonwoven webs, and other applications. The zoned hot air knife assembly and process facilitate the manufacture of low bond area, low density nonwoven webs and laminates having high structural integrity. The zoned hot air knife also reduces the amount of heated air and, thus, energy required for the production of thermally bonded nonwoven webs and laminates.
摘要:
There is provided a process which comprises the step of subjecting a just produced spunbond web to a high flow rate, heated stream of air across substantially the width of the web to very lightly bond the fibers of the web together. Such bonding should be the minimum necessary in order to satisfy the needs of further processing yet not detrimentally affect the web. The fibers of the web may be monocomponent or biconstituent and the web should be substantially free of adhesives and not subjected to compaction rolls.
摘要:
The present disclosure is directed to a method of forming a treated fiber. A molten polymer is delivered to a fiber spinning assembly adapted to form and distribute polymer streams. At least one treatment is applied in a liquid state to at least one region on the surface of at least one molten polymer stream within the fiber spinning assembly. A substantial portion of the treatment remains on the surface of the resulting fiber within the treated region. One or more regions on the surface of the molten polymer may be treated with one or multiple treatments. The degree of coverage may vary from little coverage to complete coverage of the fiber surface. The treated regions may be in contact with one another or may be separate and distinct. A nonwoven web may be produced with selectively treated fiber regions by designing one or more fiber spinning assemblies to treat selected fibers or to apply multiple treatments. The regions of the nonwoven web may vary in treatment type, amount, or degree of coverage.
摘要:
Nonwoven webs are fabricated by forming unitary multicomponent fibers comprising a plurality of individual segments partially exposed at the surface of the fiber; bonding the multicomponent fibers, such as by thermal point bonding, and then hydroentangling the bonded multicomponent fibers with a water pressure from about 400 to 3000 psi wherein the entangling process separates the individual segments of the unitary multicomponent fibers into microfibers and also entangles the fibers to form an integrated nonwoven web. The nonwoven webs include entangled webs of thermoplastic multicomponent fibers and microfibers having partially degraded bond areas comprising from about 5% to about 50% at the surface area of the web.
摘要:
A conjugate multilobal fiber and a fabric made therefrom is provided. The fiber comprises at least two polymers arranged with at least one polymer occupying a portion of the fiber and at least one other polymer having a lower melting point than the first portion polymer occupying an outer portion of the fiber. The polymers can be arranged in a number of configurations depending on the planned use of the web.
摘要:
The present invention provides a lofty nonwoven web containing pneumatically drawn filaments, wherein the web has a density from about 0.01 g/cc to about 0.075 g/cc and the microfilaments have a weight-per-unit length between about 0.1 dtex and about 1.5 dtex. The invention also provides a process for producing the lofty nonwoven web.