Fully-compatible ink-jet printing flame-retardant forward-blowing lamp sheet

Abstract

The invention discloses a fully-compatible ink-jet printing flame-retardant front-spraying lamp sheet which is characterized in that a back coating is arranged on the back surface of a base material,a bottom coating agent layer is arranged on the front surface of the base material, and a fully-compatible ink-jet printing flame-retardant coating is arranged on the bottom coating agent layer; the fully-compatible ink-jet printing flame-retardant coating is prepared from flame-retardant modified acrylic resin emulsion, and a halogen-free flame retardant, an anti-dripping agent, a smoke suppressor, a leveling agent and an anti-foaming agent are added; the bottom coating agent layer is made of a water-based two-component polyurethane binder; the base material is a transparent PET film; the lamp sheet has the advantages that various ink printing can be compatible; the coating is high in ink absorption speed, capable of adapting to high-speed printing and high in color rendition degree; thelamp sheet is waterproof, ultraviolet-proof, not easy to fade, super-strong in weather resistance, high-temperature-resistant, low-temperature-resistant, high in flatness, high in tensile strength andlong in service life; the lamp sheet is white, fine, semitransparent and uniform in light transmittance, and the light transmittance reaches 50-60%; the flame retardant property is good, the fire isextinguished immediately after leaving the fire, no obvious molten drops exist, and less combustion smoke is generated.

Description

technical field [0001] The invention belongs to the technical field of printing, and in particular relates to a fully compatible ink-jet printing flame-retardant positive blowtorch sheet. Background technique [0002] Digital advertising light film—PET digital blowtorch light film is a form of light film that has appeared in recent years. It is a light film made with high-precision commercial printing equipment, which is different from laser light film made by large-scale film washing equipment in the past. The positive blowtorch film is coated with transparent PET or white PET, and the thickness is generally divided into 150, 175, 200 microns and so on. [0003] Most of the blowtorch films are made of high-quality PET substrates, which require strong printing compatibility (suitable for outdoor solvent-based inkjet printers and weak-solvent printers, UV printers), uniform coating, good ink absorption performance, white and delicate picture quality, and high color reproducti...

AI Technical Summary

Problems solved by technology

[0011] (2) Rigid PVC substrates generally do not add plasticizers, and their low temperature resistance is poor. It is easy to become brittle in winter and will be damaged when subjected to external forces.

It is difficult to guarantee the use of outdoor light box advertisements and rolling light boxes in subways, airports, supermarkets, and traffic platforms

[0012] (3) PVC has poor stability to light and heat. When it is above 100°C or exposed to sunlight for a long time, it will decompose to produce hydrogen chloride, and further autocatalyze the decomposition, causing discoloration and rapid decline in physical and mechanical properties

[0013] (4) The flame retardant performance cannot meet the requirements of the UL94V-0 standard, and it cannot be tied away from the fire, and there may even be a small amount of burning material dripping

[0014] (5) Although PVC is flame retardant, PVC also has disadvantages such as poor thermal stability and high smoke density when burning. PVC is one of the plastic varieties with the largest amount of smoke when burned.

As a result, the flame retardant performance of the flame retardant PET film is average, it cannot be tied away from the fire, and there are flammable droplets, which cannot meet the requirements of the UL94V-0 standard.

[0021] (2) At the same time, due to the poor compatibility between additive flame retardants and PET, the uniformity of light transmission of flame-retardant PET films is very poor after being illuminated by backlighting. The shadow of uniformly dispersed flame retardant powder particles greatly affects the appearance of lamp products

[0022] (3) A large amount of flame retardant powder is also mixed with the flame retardant lamp coating of the prior art, among which the bromine antimony flame retardant system is more commonly used, and brominated flame retardants such as decabromodiphenyl ether have poor whiteness, resulting in coating The layer cannot meet the requirements of white and delicate light quality

At the same time, a large amount of flame retardant powder causes the light transmittance of the light sheet to decrease; it also affects the ink absorption speed of the coating during high-speed inkjet printing, which will cause ink halo and ink bleeding during printing, and the image resolution and color reproduction cannot meet the requirements. Requirements, not suitable for printing with solvent-based and weak-solvent inks, therefore, most of them are only suitable for UV printing, and the printing compatibility is also poor

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