Abstract:
Polymeric fibrids and paper-like structures produced therefrom are disclosed. These fibrids are produced by preparing an aqueous solution of a film forming polymer, injecting the solution into a liquid precipitating medium miscible with water but in which the polymer is insoluble, and providing sufficient shear to directly and rapidly precipitate the polymer to fibrid morphology. The fibrids, which are desirably first treated to render them more hydrophobic, may be formed into a web and dried utilizing conventional paper-making techniques to obtain the paper-like structures of the invention.
Abstract:
Synthetic wood pulp characterized by the presence of polyolefin fibrids having both film and fiber morphology is disclosed as being useful for the production of paper-like films. Further disclosed is a technique whereby this morphology may be preserved by transferring such fibrids from the refining dispersant into a preservative medium. After again being refined in the preservative medium, the fibrids can be formed directly into paper-like substrate products. More usually, however, they are first dispersed in water to facilitate this casting.
Abstract:
A reclosable fastening tab for diapers or the like forms an adhesive interface at an intermediate location within the thickness of the adhesive at the "user end" of the tab when the tab is unfastened after originally being fastened by the user. The adhesive on one side of the interface remains with the portion of the diaper to which the user end of the tab was fastened and the adhesive on the other side of the interface remains with the user end of the tab.
Abstract:
In a process for transferring indicia from paper to a fabric backing member such as a T-shirt, of the type wherein an indicia carrier layer of tacky contact adhesive is bonded to the backing member by a thermoplastic elastomer layer, the combination of webs involved in the transfer process is supported through the various steps, including the water wash and at least the initiation of fusing, by a temporary support layer of heat-resistant water-impervious polymer having a non-silicone high release coating, and heat and pressure are applied through such layer to firmly fuse the thermoplastic elastomer layer along with the carrier layer and the indicia to the backing member prior to stripping of the temporary support layer. The firm fusing and the release action established by the non-silicone high release coating prevent distortion or destruction of any portion of the indicia during the stripping step.
Abstract:
An array of at least three parallel rolls is provided. The rolls are constrained against each other to provide an elongated coating chamber through which passes a web entrained on at least one of the rolls. As it exits from the chamber, the coated web surface is wiped by another of the rolls, whose surface is entering the chamber at that point.
Abstract:
Synthetic wood pulp characterized by the presence of polyolefin fibrids having both film and fiber morphology is disclosed as being useful for the production of paper-like films. Further disclosed is a technique whereby this morphology may be preserved by transferring such fibrids from the refining dispersant into a preservative medium. After again being refined in the preservative medium, the fibrids can be formed directly into paper-like substrate products. More usually, however, they are first dispersed in water to facilitate this casting.