摘要:
The present invention is directed to absorbent composites comprising superabsorbent materials. The superabsorbent material has: an Absorption Time of about 5+10 a2 minutes or greater, where a is the mean particle size of the superabsorbent material in millimeters; a capacity of about 15 g/g or greater; a Drop Penetration Value of about 2 seconds or less; and, a ½ Float Saturation of 50% or less. The present invention is further directed to fiber-containing fabrics and webs comprising superabsorbent materials and their applicability in disposable personal care products.
摘要:
An in-line formed web or other material (such as foams) having major surfaces in the X-Y plane and a depth in the Z direction is suitable for use as an integral fluid distribution and fluid retention material in a disposable absorbent article. The web or material contains multiple zones of material which may have both thermoplastic fibers/materials and absorbent material components. The multiple zones can have different compositions of thermoplastic fibers/materials and absorbent material as applied in-line by various arrangements of thermoplastic melt dies and absorbent fiber/material dispensers. By arranging at least two of the multiple zones in an opposing relation overlaid in the Z-axis direction of the web/material, a gradient can be formed in the Z-direction of the web/material. In the case of airforming, by coordinating the timing and deposition of the material onto a forming wire, at least one of the multiple zones is arranged to have intermittent material deposition in at least one of a machine direction or a cross direction of the web. Thus the in-line formed integrated web has a Z-direction gradient of air laid material zones and zones of different materials intermittently placed in one of the machine direction or the cross direction and may be customized according to the specific need for a single overall structure having fluid intake, distribution and retention properties in an absorbent article.
摘要:
An absorbent fibrous foam composite comprising a fluid intake capacity of at least 15 g/g, a vertical wicking distance of at least 10 cm, and an absorbency under zero load of at least 15 g/g. The absorbent fibrous foam composite comprising a water insoluble fibrous material and a superabsorbent material. The absorbent fibrous foam composite made by forming a slurry of water, a water-insoluble fiber, and a binding agent. A water-swellable, water-insoluble superabsorbent material is added to the slurry and the temperature is lowered until the water freezes. The frozen water is then removed by sublimation process and an absorbent fibrous foam recovered. The Gelation Time, which represents a fluid absorption rate of superabsorbent during the preparation, is critical to preparing uniform absorbent freeze-dried foams and can be adjusted by various mixing conditions and physical and chemical superabsorbent treatments.
摘要:
Absorbent article including an absorbent core having multiple absorbent layers. The absorbent layers interact in a manner which desirably locates absorbed liquid in an appointed, high saturation wicking layer.
摘要:
A distinctive absorbent article includes an absorbent core having multiple absorbent layers, wherein the absorbent layers interact in such a manner which preferentially locates absorbed liquid in an appointed, high saturation wicking layer. The localization of the liquid within this wicking layer increases the potential of this layer to move liquid through capillary action due to the higher saturation level and increased amount of liquid available. The intake capability of the absorbent system is maintained or improved over current systems by keeping a second layer of the absorbent system at low saturation levels through as many insults of the product as possible, while providing optimum intake performance through appropriate control of the composite properties. The low saturation in this layer provides void volume for the incoming insult as well, as a high permeability, thus increasing the intake rate of the absorbent system as a whole, but the structure of the low saturation layer is also balanced to provide an appropriately high level of capillary tension to provide enough control of the liquid to stop leakage from occurring. This low saturation layer is used in addition to a surge material and provides intake functionality in addition to that provided by the surge material. In particular aspects of the invention, the body side layer of the absorbent core does not extend over the entire surface of the overall absorbent core, therefore is not used as the high saturation, wicking layer, but as the intake layer. This arrangement also allows the intake layer to be in direct contact with the incoming liquid, therefore allowing for more immediate access and improved intake function. In additional aspects, at least one primary layer region can have a non-uniform, selectively zoned basis weight distribution. Particular configurations of the at least one primary layer region can be constructed with a target area of such primary layer region having a basis weight which is less than a basis weight of another non-target portion of the primary layer region. Moreover, at least one primary layer region can have a heterogeneous structure. In particular constructions, the at least one primary layer region can include a plurality of two or more sublayers.
摘要:
A distinctive absorbent article includes an absorbent core having multiple absorbent layers, wherein the absorbent layers interact in such a manner which preferentially locates absorbed liquid in an appointed, high saturation wicking layer. The localization of the liquid within this wicking layer increases the potential of this layer to move liquid through capillary action due to the higher saturation level and increased amount of liquid available. The intake capability of the absorbent system is maintained or improved over current systems by keeping a second layer of the absorbent system at low saturation levels through as many insults of the product as possible, while providing optimum intake performance through appropriate control of the composite properties. The low saturation in this layer provides void volume for the incoming insult as well, as a high permeability, thus increasing the intake rate of the absorbent system as a whole, but the structure of the low saturation layer is also balanced to provide an appropriately high level of capillary tension to provide enough control of the liquid to stop leakage from occurring. This low saturation layer is used in addition to a surge material and provides intake functionality in addition to that provided by the surge material. In particular aspects of the invention, the body side layer of the absorbent core does not extend over the entire surface of the overall absorbent core, therefore is not used as the high saturation, wicking layer, but as the intake layer. This arrangement also allows the intake layer to be in direct contact with the incoming liquid, therefore allowing for more immediate access and improved intake function.
摘要:
A soft, flexible, low-density, open-cell, thermoplastic, absorbent foam formed from a foam polymer formula including a balanced amount of a plasticizing agent and a surfactant in combination with a base resin. Thermoplastic elastomers can be added to the foam polymer formula to improve softness, flexibility, elasticity, and resiliency of the resulting foam. The surfactant may be either a single surfactant or a multi-surfactant system. The foam possesses a number of qualities, such as softness and strength, which render the foam particularly suitable for use in a variety of personal care products, medical products, and the like.
摘要:
Disclosed are absorbent composites, useful in an absorbent article, having high liquid intake rates. The absorbent composites may also have a rapid liquid lock-up. Absorbent composites of this invention have an intake rate of at least about 1.9 cc liquid/second at an 80% absorbent composite saturation level and a liquid lock-up fraction of at least about 0.70 at 50% superabsorbent material saturation. The absorbent composites of this invention can be a freeze-dried composite, an airformed absorbent composite, or other fibrous or non-fibrous absorbent composites.
摘要:
A soft, flexible, low-density, open-cell, thermoplastic, absorbent foam formed from a foam polymer formula including a balanced amount of a plasticizing agent and a surfactant in combination with a base resin. Thermoplastic elastomers can be added to the foam polymer formula to improve softness, flexibility, elasticity, and resiliency of the resulting foam. The surfactant may be either a single surfactant or a multi-surfactant system. The foam possesses a number of qualities, such as softness and strength, which render the foam particularly suitable for use in a variety of personal care products, medical products, and the like.
摘要:
A thermoplastic foam composite has at least one active agent layer, which includes active agent materials that are coated with a thermal-sticky polymer, and which is bonded to at least one surface of a soft, flexible, absorbent thermoplastic foam layer. The thermoplastic foam composite can exhibit desirable active agent properties while maintaining sufficient integrity, absorbency, and/or flexibility for specific applications. In some aspects, an adhesive can be utilized to assist with bonding the active agent layer to the thermoplastic foam layer. The thermoplastic foam composite can be utilized as an article, such as a packaging, wiper, towel, or insulation product, or can be incorporated as a component into a variety of other articles, including personal care articles, health/medical articles, and household/industrial articles, for example.