摘要:
A protective and decorative polymeric sheet material for bonding to substrates by thermoforming comprises a flexible carrier film, a paint layer on one surface of the carrier film containing a colorant or light reflective flakes or both; and a transparent topcoat overlying the paint layer. At least a portion of the transparent topcoat is a rubbery cushioning layer formed of a non-crosslinked, or lightly crosslinked polymeric composition of low Tg.The sheet material has an unextended state and is heat softenable to a plastic state in which it is extendable to an extended state at least 50% greater in area than the unextended state. The paint and topcoat layers have substantially uniform quality and appearance in both the unextended and extended states. In a preferred embodiment, the thickness of the transparent topcoat is at least 0.1 millimeter. The thick topcoat provides improved retention of gloss and distinctness of image when the sheet material is stretched. As compared with sheet material of which the topcoat layer consists entirely of crosslinked polymer of relatively high Tg, the sheet material of the invention shows a reduced tendency to peel back from the substrate when cut and subjected to high temperature.
摘要:
A latex paint containing water and one or more higher boiling organic solvents is coated on a carrier film and dried by a process which yields a dried paint layer free of bubble defects. The film is passed continuously through a series of at least three drying stages in contact with warm, moderately humid air and more than half of the heat required for evaporation is supplied to the underside of the film. Drying conditions in at least each of the first three stages are controlled to maintain a film temperature profile which causes the water to evaporate at a moderate rate but more rapidly than the organic solvents, thus achieving coalescence of the paint and avoiding the trapping of liquids in a surface-hardened paint layer.
摘要:
A flexible and stretchable sheet material that is capable of being stretched to conform to a three-dimensional substrate to form a protective and decorative coating thereon is comprised of a thin flexible support having adhered thereto a protective and decorative layer such as a paint layer comprising a colorant incorporated in a film-forming binder. Both the support and the protective and decorative layer are characterized by a very high degree of thickness uniformity and the sheet material exhibits a high level of surface uniformity, an ability to undergo substantial elongation, and a substantially uniform quality and appearance; whereby it can be stretched and bent in the process of bonding it to a substrate and still achieve a defect-free coating of uniformly attractive appearance.A process for the manufacture of the sheet material comprises the steps of:providing a flexible support sheet;providing a fluid protective and decorative film-forming composition;forming a laminar flow of the composition and directing the flow into contact with the surface of the support to form thereon a protective and decorative layer of substantially uniform thickness; and converting the protective and decorative layer to a dry and tack-free state.In one preferred embodiment, the protective and decorative layer comprises a film-forming binder, a colorant and generally flat light-reflecting particles which are effectively oriented by the laminar flow process to provide a layer characterized by a high degree of geometric metamerism.
摘要:
A flexible, thermoformable sheet material is bonded to a three-dimensional substrate to form a protective and decorative surface having the appearance of a basecoat-clearcoat automotive finish by a method which includes sequentially thermoforming a thermoplastic paint-coated basecoat sheet and a thermoplastic clearcoat sheet onto the substrate.
摘要:
A flexible and stretchable sheet material that is capable of being stretched to conform to a three-dimensional substrate to form a protective and decorative coating thereon is comprised of a thin flexible support having adhered thereto a protective and decorative layer such as a paint layer comprising a colorant incorporated in a film-forming binder. Both the support and the protective and decorative layer are characterized by a very high degree of thickness uniformity and the sheet material exhibits a high level of surface uniformity, an ability to undergo substantial elongation, and a substantially uniform quality and appearance; whereby it can be stretched and bent in the process of bonding it to a substrate and still achieve a defect-free coating of uniformly attractive appearance.
摘要:
A protective web is releasably laminated to an adhesive-coated stretchable web by continuously drawing the webs at differential degrees of tensile strain into laminating contact in the nip formed by a resilient and a non-resilient roller.
摘要:
In the manufacture of a paint-coated stretchable film which is useful as a covering for automobile panels and other articles, a stretchable carrier film is formed by extruding a thermoplastic polymer composition onto a heat resistant temporary carrier film. The extruded layer is coated with paint or other layers and dried initially at a moderate temperature and finally at a high temperature which exceeds the heat deformation temperature of the stretchable carrier film but not of the heat resistant temporary carrier film. This shortens drying time and/or reduces residual solvents in the dried layers. The temporary carrier film, which is later stripped away, resists deformation of the laminate as it is drawn under tensile stress through the coating and high temperature drying stages.
摘要:
Method and apparatus for making thermoplastic web from polyester or polyester blends for subsequent aqueous coating without requirement of an undercoat or primer coat for adhesion of subsequent coatings. Feedstock pellets of polymer, such as polyethylene terephthalate or polyethylene naphthalate, are melted in a screw extruder. Molten polymer is extruded from an extrusion die as a thick, high-viscosity ribbon, which is tempered and stretched in both the machine direction and the transverse direction to form a web of biaxially-oriented polymer of the desired width and thickness. The web is heated to a temperature above T.sub.g to set the biaxial orientation and then is glow discharge treated by passing it through an in-line glow discharge apparatus at atmospheric pressure wherein a stable glow discharge is produced in a gas mixture containing helium between two electrodes connected by an alternating power source operating at a voltage between 0.5 kV and 20 kV at a frequency between 60 Hz and 40 MHz. The web is coated with an aqueous gelatin subbing layer. The coated web then is maintained at elevated temperature. The combination of glow discharge treatment before sub coating and heat treatment after sub coating greatly enhances the adhesion of subsequently-coated aqueous gelatin layers such as photographic emulsions to the web, sufficiently that adhesion-promoting U-coat or primer coat as required in prior base-making methods can be omitted.
摘要:
A continuous method for making a protective and decorative sheet material comprises:(A) forming a highly reflective, specular metal layer on a continuously moving web of a thermoformable carrier film; and(B) continuously bending and drawing the web biaxially around first and second non-parallel cracking members to create in the metal layer a pattern of microscopic cracks which, when the sheet material is stretched and thermoformed, is capable of exhibiting a brushed metal appearance.
摘要:
A tie-coat composition for preparing paint-coated, stretchable polyester which can be bonded to automobile panels. The tie-coat contains a non-ionic, fluorinated surfactant which reduces product non-uniformities.