Abstract:
Methods and apparatus for producing composite-coated rigid flat-rolled sheet metal substrate in which thermoplastic polymeric materials are selected and combined for dual-layer molten-film extrusion presenting a first-contacting tie-layer and an externally-located finish-layer which are simultaneously extruded for a single substrate surface at-a-time; in which tie-layer selection includes an ethylene-glycol modified PET, requiring a substrate-surface temperature between 230° F. and 300° F., and a maleic-anhydride modified polyethylene free of any substrate-surface heating requirement; the tie-layer provides sufficient green-strength-adhesion for a finish-layer selected from PBT, PET, and a combination of PBT and PET; each substrate-surface is separately activated for desired adhesion and separately polymeric coated; dual-surface finishing-processing is carried-out by remelting the coated polymeric materials for completing bonding of the dual polymeric layers on each inorganic-metallic protectively-coated surface of the substrate.
Abstract:
According to the coating method of the present invention, the uneven portion on the land of the upstream side makes it possible to increase a contact area between the coating solution and the land, thereby improving the stability of a bead. In other words, according to the coating method of the present invention, it is possible to improve the stability of a bead on the upstream side, the stability having been reduced by the overbite shape of the die. Thus, even when a coating solution having a low viscosity of 10 cp or less is applied with a small coating amount of 10 cc/m2 or less, it is possible to increase the speed of the web without causing an uneven coating.
Abstract translation:根据本发明的涂布方法,上游侧的焊盘上的不平坦部分可以增加涂布液和焊盘之间的接触面积,从而提高焊道的稳定性。 换句话说,根据本发明的涂布方法,可以提高上游侧的珠粒的稳定性,通过模具的偏斜形状降低了稳定性。 因此,即使以10cc / m 2以下的小涂布量涂布低粘度为10cp以下的涂布液,也可以不引起不均匀涂布而提高幅材的速度。
Abstract:
A method and a device for coating a hollow cylindrical member. The method includes radially coating an entire inner surface of the hollow cylindrical member with a first coating material discharged by a first slit nozzle and simultaneously circularly coating an entire outer surface of the hollow cylindrical member with a second coating material discharged in an axial direction of the hollow cylindrical member by a second slit nozzle located opposite the first slit nozzle with the hollow cylindrical member therebetween. The first slit nozzle and the second slit nozzle discharge the first coating material and the second coating material, respectively, to a same height of the hollow cylindrical member relative to the inner surface and the outer surface thereof.
Abstract:
The invention relates to a method for applying a film to a planar, especially air-impermeable substrate, comprising the steps: (a) feeding the planar substrate in a direction of feed towards an application device, (b) applying a film output by the application device to the planar substrate, and (c) sharply deflecting the planar substrate together with the film that is in contact therewith to a deflection area in a discharge direction different from the direction of feed. The invention also relates to a deflecting element for deflecting a planar substrate. Said element comprises at least one guiding surface adapted to guide a planar substrate and an additional guiding surface, forming an edge for sharply deflecting a planar substrate with the first guiding surface. At least one pressure channel extends through the deflecting element towards the edge and runs into at least one outlet opening in the area of the edge, said opening being configured in such a manner that the pressurized air discharged from said opening forms an air cushion which extends around the edge.
Abstract:
A process for extrusion coating metal foils and metallized films which utilizes a mixture of silanated and non-silanated ethylene polymers is provided.
Abstract:
Surface coverings and surface covering components and methods for forming them using slot die coating are disclosed. The methods involve applying a plurality of wet layers to a substrate simultaneously or in sequence using a slot die coater, wherein a plurality of wet layers can be applied before any of the individual layers are dried, gelled, cured and/or fused. The layers remain separate and distinct before and after drying, gelling, curing and/or fusing, and can be dried, gelled, cured and/or fused together or separately after wet on wet application to the substrate. The surface coverings may be decorative surface covering, including floor coverings.
Abstract:
A process for preparing a pressure sensitive adhesive using a modified planetary roller extruder is described. The process in accordance with one aspect of the invention includes introducing primary raw materials including a non-thermoplastic elastomer into a feeding section of the modified planetary roller extruder, conveying the raw materials from the feeding section to a compounding section of the modified planetary roller extruder, continuously mixing the primary raw materials in the compounding section to produce a homogeneous adhesive composition. The adhesive composition may be applied to a web-form material. The compounding section of the modified planetary roller extruder includes a main spindle surrounded by and intermeshed with a plurality of planetary spindles at least one of which is a double transversal mixing spindle having a plurality of back-cut helical flights.
Abstract:
A process is provided for making a composite work article suitable for fabricating rigid sheet metal can components. A steel sheet having first and second surfaces is pre-treated to enhance reception and retention of a multi-layer polymer coating on the pre-treated first surface. The multi-layer polymer coating is melt extruded on the pre-treated first surface and beyond opposite lateral edges of the work article to establish overhang portions, then solidified. The multi-layer polymeric coating has a tie polymeric layer contacting the pre-treated first surface, and a finish-surface polymeric layer. The solidified overhang portions are trimmed, and the extruded multi-layer polymeric coating is subjected to finish-treatment, involving heating the extruded multi-layer polymeric coating at least to a melt temperature thereof, then cooling the multi-layer polymeric coating through glass-transition temperature thereof at a sufficiently rapid rate to establish amorphous non-directional characteristics in the polymeric coating.
Abstract:
A method for slot extrusion coating a liquid composition at a coating temperature and a coating speed at or above 40 m/min, said liquid composition having a viscosity at said coating temperature of at least 500 mPa·s at a shear rate of 100 s−1, comprising the step of: (i) selecting said liquid composition for slot extrusion coating having a tan δ of less than 1000 measured by oscillatory dynamic viscosity measurements at 1 Hz, the coating temperature and a shear stress of 250 Pa under conditions in which there is effectively no variation in shear stress within said liquid composition during said measurement, said liquid composition being selected from liquid compositions each comprising at least one binder and a liquid carrier medium; and (ii) slot extrusion coating the composition via a slot onto a web support with a bead vacuum at the coating temperature and the coating speed.
Abstract:
An apparatus and related method for forming a three-dimensional polymer based part including a die tool having a specified shape and size and exhibiting an exposed polymer adhering surface corresponding in configuration to a polymeric based part to be created. A volume holding bin supports a three-dimensional article including at least one exposed and pattern defining surface. A volume of a granulated polymer material is deposited into the bin and around the article. A sub-volume of the material adheres to and forms a hardened layer upon the exposed pattern defining surface, a corresponding part created having a specified thickness and matching configuration.