387results about "Lap forming devices" patented technology

The present invention provides an improved apparatus for forming a fibrous pad for absorbent products with improved density control. Fibers entrained in a high speed air flow are deposited onto the foraminous surface of a spaced, three-dimensional pad-forming pocket. The fine foraminous pad forming screen is supported on its periphery by two top plates, a coarse forming screen, two subplates and end rails which incorporate a device to hold the pad forming screen. A gas flow regulating system consisting of precisely placed cross directional fixed and adjustable airflow control louvers controls the air flow direction and reduces spill over and turbulence during the pad formation and especially during the transition of the forming pocket into and out of the air stream as the rotary former shell rotates through the filling position. Additional control of density and fiber placement is gained through the use of additional gas control innovations including a tapering the pocket ends such that the airflow is streamlined especially during pocket transition through forming sections.

A non-woven fiber assembly comprises one or more fibers containing an adhesive component, an elastomeric component, and a hydrophilic component. A method of making a non-woven fiber assembly comprises the steps of providing one or more fiber-forming materials comprising an adhesive component, an elastomeric component, and a hydrophilic component, and forming said one or more fiber-forming materials into at least one fiber. A method of treating a patient comprises applying a medical dressing comprising the fiber assembly of the present invention to a patient. An apparatus (10) for forming a non-woven fiber assembly comprises a plurality of reservoirs (12, 16, 20) for containing more than one type of fiber-forming material, a plurality of valves (14, 18, 22), each independently in communication with a reservoir, and a fiber-forming device (28) selected from the group consisting of a spinnerette, a NGJ nozzle, and an electrospinning device, in communication with the valves.

The invention discloses a method for preparing air-laying cellucotton and cellucotton produced by the method. Taking low melting point fibers and other fibers as raw material, the cellucotton is produced by rough shape cutting, coarse opening, fine opening, air laying, hot binding and parting cut packaging, wherein the air laying is as follows: the loose fibers which are distributed evenly in a cotton box after fully mixed by the fine opening are further mixed by airflow and delivered by pressurized airflow to between the net forming curtain and the net forming roller to be formed into a required retiform structure. The preparing process has wide range of material selection, is suitable for not only all the raw materials adopted in the prior process, but also the plant fiber widely existing in the natural world which are not used in the prior art such as couch grass, reed, cornstock, straw and bagasse as raw materials, and the waste materials such as wood wool, crushed sponge and wool manufacturing crushed aggregates to reuse and regenerate; in addition, the preparing process has high production efficiency and low energy consumption, and produces the cellucotton with great improvement in the performance, thereby being applied to wider fields.

The present invention is a multicomponent fiber comprising a temperature-regulating inner fiber component encapsulated by an outer fiber component. The invention further provides methods of preparing the inventive multicomponent fiber and methods of preparing a temperature-regulating fiber component incorporating at least one phase change material.

A device on a spinning preparation machine, for example a tuft feeder, having a feed device comprising at least one slow-speed feed roller and a counter-element, for example a feed tray, with which fibre material can be supplied to a downstream transport device, has a driven transport element, for example a conveyor belt. In order to provide improved delivery from the feed device, or improved takeover by the downstream transport device, and to allow troublefree operation, for the purpose of determining setting values for the optimum speed of the transport element, a function between the measured values of the feed roller speed and the measured values of the transport speed is so determined that the fibre material lies on the moving surface of the transport element.

Hollow fiber cartridges and components and methods of their construction.

In a method of manufacturing a fibrous formed product, a mixture of fibers, including thick fibers and thin fibers, is prepared in order to form fibrous mats. The mixed fibers are supplied onto an outer peripheral surface of a roller. As the roller rotates, the mixed fibers are released from the roller and are thrown toward a fiber receiving surface. A fibrous mat is formed on the fiber receiving surface with a low-density layer next to the fiber receiving surface and a high-density layer on top of the low-density layer. Thick fibers mainly form the low-density layer and thin fibers mainly form the high-density layer. First and second fibrous mats are overlaid with one another such that their low-density layers oppose each other.

A non-woven fiber web laying apparatus including (1) a camel back cross lapper having a supply arm, a layering arm connected thereto, and two delivery transport belts guided in juxtaposed fashion from an infeed zone to a lower end of the layering arm and (2) an upstream web buffering apparatus adapted to hold a web between two take-up transport belts at least one of which is one of the two delivery transport belts, the apparatus sandwiching the web substantially the entire path from the take-up site to the layering-arm lower end. While at least one of the two take-up transport belts of the web buffering apparatus is one of the delivery transport belts of the cross lapper, in one embodiment both of the take-up transport belts are the delivery transport belts. In another embodiment, only one of the take-up transport belts is a delivery transport belt, the other being a pressure belt operating only within the web buffering apparatus.

The invention relates to a cross-lapper and to a method for forming a nonwoven fabric made of a plurality of pile layers, consisting of an continuously revolving feed belt (E), a counter belt (D) continuously revolving at the same speed in the opposite direction, as well as an additional counter belt (G), wherein the pile (F) to be laid is first conveyed between a feed belt and cover belt (E, D) to a movable upper carriage (OW), which comprises a first deflection roller (O) for the feed belt (E), and is transferred there to the counter belt (G), wherein the feed and counter belts (E,G) are guided around two adjacent laying rollers (LE, LG) of a laying carriage (LW) which form a laying gap, and the laying carriage (LW) is movably mounted transversely to and above a discharge belt (AB) receiving the nonwoven fabric to be laid and moves back and forth periodically. According to the invention, the cover belt (D) is guided jointly with the feed belt (E) around a partial circumference of the first deflection roller (O).

The invention discloses an environment-friendly type bast fiber film preparation device, which comprises two feeding machines, a feed mixer, a crude opening machine, a fine opening machine, a vibrating air pressure bast feeding box, a carding machine, a mechanical cross lapper, an air-lay machine, an impregnator, a drying can type pre-drying pit, an air-pressure double-roller planishing mill, a surface spraying coating machine, a drying can type dying setting machine, a drafting side cut lap former and the other operation unit machines. Each unit-air conditioning adopts variable-frequency control and a synchronizer to control electric appliances, and each unit-air conditioning can be singly operated in high speed, and can be interlocked to operate with complete equipment. The invention has the advantages that fibrilia is delivered by an airflow pipeline on the crude opening machine, and between the crude opening machine and the carding machine, and the supply of raw material is continuous, net is combined in two times through a machine to pave net and airflow to form net, bast fiber film net has little density, even strength and stable quality, even coating layers are coated and sprayed on double faces of bast fiber film, and bast fiber film with different functions and usages can be made, continuous and stable full-automatic production of bast fiber film can be achieved.

The present invention refers to a process of making a fibrous structure, wherein roughly graded material is provided to rotating, apertured drums. The drums have at least one needle roll in their inside. The roughly graded material is agitated inside the drums, whereby fibers or small fiber clusters are separated from each other. These fibers and small fiber clusters are flung through the apertures to the outside of the drum, where they are directed onto a foraminous carrier to form a fibrous structure. The fibrous structures are especially useful in absorbent articles.

A stapled melt spinning method for producing nonwoven fabrics with hygroscopic metastatic feature. Firstly, fuse bio-polyamide 6,10 into melt, extrude and spin it out spin heads of extruder into filaments, cool, draw and collect filaments into tow, then extend, cut and card the filaments into the staples, and spread the staples on a conveyer to form fibrous web. Next, blend and dissolve pulp by N-methylmorpholine N-oxide (NMMO) dissolving solvent, dehydrate it to form dope, and extrude and spin it out spin heads of extruder into filaments, then cool, draw and collect filaments into tow, and extend, cut and card filaments into staples, then overlay the staples over existing fibrous web to form a composite fibrous web of bio-polyamide 6,10 and cellulose filaments. Finally, coagulate, regenerate and convert fibrous composite of bio-polyamide 6,10 and natural cellulose into nonwoven fabric with hygroscopic metastatic feature by hydro-entangled needle punching, drying, winding-up processes.

The invention concerns a forming head for an apparatus for the production of a non-woven fabric by depositing fibres on a conveyor belt, comprising a fibre feeder which opens into a fibre processing chamber and which has a lower deposit opening for the delivery of fibres, wherein arranged in the fibre processing chamber are interengaging needle rollers with longitudinal axes oriented in mutually parallel relationship, which can rotate about their respective longitudinal axis, and the interengaging needle rollers enclose an inner chamber and are arranged with respect to the fibre feeder and the deposit opening in such a way that fibres fed to the forming head in operation enter the inner chamber by passing through between interengaging needle rollers and leave the inner chamber also by passing through between interengaging needle rollers.

The invention discloses a core spun yarn taking collagenous fibers as a main material and as a leather layer and a processing method of the core spun yarn. The core spun yarn comprises a core yarn, wherein a leather layer formed by collagenous fiber bundles or a collagenous fiber bundle and other textiles covers or cover the core yarn; a collagenous fiber bundle and a branch thereof and an adjacent collagenous fiber bundle and a branch thereof form three-dimensional meshed structures which are mutually staggered, twisted and combined and axially arrayed. The processing method of the core spun yarn taking the collagenous fibers as the main material and as the surface layer comprises the following steps: (1) extracting collagenous fibers; (2) carding and striping the fibers; (3) drawing the fibers; and (4) performing spinning. According to the core spun yarn and the processing method thereof, the problem that the basic tensile strength cannot be achieved by extracting the collagenous fibers from leather and directly spinning the fibers in the prior art is solved, and the shortcoming that fine yarns are very hard to process or cannot be processed and the shortcoming that a product cannot fully exert the characteristic of the collagenous fibers as a large number of other textile fibers must be blended for spinning are overcome.

A yarn producing apparatus is an apparatus for producing CNT (carbon nanotube) yarn from CNT fibers while causing the CNT fibers to run. The yarn producing apparatus includes an aggregating unit that aggregates the CNT fibers, and a twisting and winding device that twists the CNT fibers aggregated by the aggregating unit.

The application relates to a microwave sensor for measuring a dielectric property, especially the density and/or moisture content of a product, having a microwave resonator, wherein a product introduced into the resonator interacts with a resonant microwave field generated in the resonator in order to determine suitable measured quantities, and is characterised in that at least two half-waves of the electric field are formed in the resonator in one direction, the product feed being effected in at least one region of high field intensity of one of the half-waves of the electric field.