Abstract:
La invencion se relaciona con un método para producir una cinta adhesiva para el cierre o fijacion reseparable, que comprende un portador en forma de tira (1), el cual está recubierto con un agente autoadhesivo (2), por lo menos sobre el área activa que durante el uso de la cinta adhesiva se pone en contacto con la superficie opuesta (7), y también se relaciona con la cinta adhesiva como tal. Para mejorar la produccion de la cinta adhesiva, se sugieren varios métodos, de acuerdo a uno de los cuales en una primera etapa se recubre el área activa con un agente autoadhesivo (2)n, formando una capa continua, y una segunda etapa a fin de reducir la efectividad del área adhesiva total, se imprime un patron de separacion (4) no adherente, o menos adherente sobre la capa autoadhesiva.
Abstract:
Una hoja compuesta holográfica y un método para formarla permite a la persona responsable de producir el documento final al imprimir la imagen holográfica directamente en el documento final permitiendo con esto que dicha persona retenga y mantenga el control de su propio troquel holográfico de estampado en realce y de la laminita en donde se ha formado el holograma y que se utiliza para estampar en realce la imagen holográfica en el documento. Una película en donde la imagen puede estamparse directamente sobre el documento final incluye un revestimiento de liberacion, una capa de metal con un grosor en el rango de 20 milimicras a 100 milimicras, un revestimiento de laca con un grosor en el rango de 0.5 micras a 3 micras, un adhesivo activable por calor y una capa de enlace, para incrementar la adhesion entre el revestimiento de laca y el revestimiento adhesivo. La capa de liberacion, la capa de metal, el revestimiento de laca, la capa de enlace y el adhesivo activable por calor se adhieren al substrato conformando el documento final durante una operacion de estampado que libera dicha capa de liberacion, dicha capa de metal, dicho revestimiento de laca, dicha capa de enlace y dicho adhesivo activable por calor de una película de plástico portadora a la que se le habían aplicado inicialmente.
Abstract:
A surface treating agent for fabricated articles of olefin polymers which is composed of an organic solvent solution of a modified polymer resulting from the graft copolymerization of a propylene-ethylene copolymer with maleic acid or maleic anhydride. The propylene-ethylene copolymer has a propylene content of 50 to 75 mole% and a crystallinity determined by an X-ray diffraction method of 2 to 20%. The amount of maleic acid or maleic anhydride grafted is 0.5 to 15% by weight. The modified polymer has an intrinsic viscosity of at least 0.3 dl / g, and is dissolved in the organic solvent in a concentration of 10 to 100 kg / m) of solvent. The treating agent can be prepared by dissolving the propylene-ethylene copolymer in the organic solvent before carrying out the grafting reaction or by carrying out the grafting reaction in a melt before adding the organic solvent. The treating agent is suitable for use as an undercoat for olefin polymer articles and improves the adhesion of a paint thereto.
Abstract:
A method for treating a nail in order to increase the withdrawal load required to withdraw the nail from a piece of timber into which it has been driven. In accordance with the invention the nail is coated with a suspension containing a chelating agent so selected that, upon contact with lignin present in the timber the nail is bonded to the lignin via a chelate bond. The chelating agent comprises a modified polysaccharide in aqueous solution and is provided with a protective colloid to which the chelating agent has a lower affinity than to the lignin present in the timber. The suspension also includes a suspended polymeric thermoplastic resin to which the chelating agent has a lower affinity than to the protective colloid.
Abstract:
A laminated waterstop strip is placed on the top of a surface of a hardened concrete layer of footing of a building, prior to pouring of an additional layer preferably bentonite. The strip has a number of granular layers (88, 92) held with adhesive (86, 90) between each of the layers. 30 to 60 individual granular layers (88, 92) are built up to a height of up to the range of one inch or more. The particles are adhered to a fabric layer (11) for support. A light weight, synthetic fiber mesh for providing weather and tear resistance is placed over the upper layer of particles. The waterstop strip is made in a batch process before being cut into strips by utilizing a reciprocating multi-station adhesive and particle dispensing carriage used to build up the strip to the desired height.
Abstract:
This invention is a method of using a heat activatable adhesive for laminating vinyl sheet to wood. The solvent-free adhesive combines a reactive styrene-acrylic latex emulsion and an ethylene-vinylacetate copolymer. After application to the vinyl substrate the adhesive is heat activated at temperatures as low as 160 DEG F (71 DEG C) and the laminate resists 200 DEG F (93 DEG C).
Abstract:
Dual layer, pressure sensitive label sheets (12) for ion deposition printing, use an adhesive (22, see Fig. 3) on the back of the labels (14) in the form of geometric patterns (24) with narrow, adhesive-free bands (26) between the geometric patterns. The patterns may be hexagonal (24) or diamonds, for example, so that the edges of the die-cut labels (14) will be held down; and the adhesive-free areas (26) may be less than 1/16 inch, preferably in the order of 1/32 inch in width so that with the high pressures encountered in ion deposition printing (see. Fig. 5), curl-free labels with high resolution printing is achieved.
Abstract:
A process for making an adhesive comprising allowing a carrier web coated with a thermal free-radically polymerizable mixture to remain in a heat exchange medium for a time sufficient to subdue the reaction exotherm and maintain a reaction temperature by thermal contact of the polymerizable mixture with the heat exchange medium and to effect conversion of the coating to an adhesive layer, preferably to a pressure sensitive adhesive layer, wherein the coating is a substantially solvent-free thermally initiated polymerizable mixture comprised of at least one free radical monomer, at least one thermal initiator, optionally, at least one cross-linker and optionally, at least one co-monomer.
Abstract:
Removable label stock and a process for its preparation. The stock (10) comprises discontinuous emulsion adhesive segments (12) on at least a portion (14) of one side of a face thereof. The amount of adhesive present for contact with a smooth surface is from about 10 percent to about 30 percent of the amount of adhesive which would have occupied the portion if the face stock were continuously coated with the adhesive. The emulsion adhesive segments have an average height, relative to the surface of the face stock, of from about 15 to about 35 microns; a room-temperature storage modulus of from about 2 x 10 to about 1.5 x 10 Pascal at a deformation rate of about 10 radians per second, a room-temperature storage modulus of from about 4 x 10 to about 5 x 10 Pascal at a deformation rate of about 10 radians per second, a room-temperature storage modulus of from about 1 x 10 to about 8 x 10 Pascal at a deformation rate of about 10 radian per second, and a room-temperature storage modulus of from about 6 x 10 to about 7 x 10 Pascal at a deformation rate of about 10 radian per second; a 180 peel strength on a stainless steel panel, having a roughness of about 0.5 micro-inch, of from about 0.5 pound to about 2 pounds per inch at a coating weight of about 40 grams/m ; and a glass-transition temperature of less than 250 Kelvin.
Abstract:
A self-assembled multilayer and in particular polymeric self-assembled multilayer can be effectively produced from two or more self-assembled monolayers on a substrate where each of the self-assembled monolayers is produced for a block containing a first functional group and a second functional group where the second functional group is reacted with the first functional group. The production of polymerizable, self-assembled mono- and multilayers from, e.g., blocs containing at least two acetylene groups and/or polymerizable end groups, is also provided. The polymerized mono- or multilayer can be employed in a variety of applications including photolithography.