31results about How to "Reduce the number of coating layers" patented technology

The invention relates to a preparation method of a fiber reinforced compound silica sol shell for investment casting, which aims to solve the problem that a shell preparedin the prior art is low in humidity and strength, and comprises the sequential steps as follows: 1), surface layer coating preparation; 2), surface layer shell preparation; 3) transition layer coating and shell preparation; 4) back layer coating preparation, that is, adding mullite powder into silica sol according to the mass ratio of (2.2-3.0):1 of the fireproof mullite powder to the silica sol in the back layer coating, so that paste-shaped coating is obtained, and agitating; adding polypropylene fiber which is 0.4 percent-2.0 percent of the fireproof mullite powder in mass in the back layer coating into the agitated paste-shaped coating, enabling the polypropylene fiber to uniformly disperse, adding the silica sol once again so as to lower the mass ratio of the mullite powder to the silicon sol to (1.1-1.5):1, and continuously agitating the mixture for 2 h for stand-by application; selecting the polypropylene fiber with the diameter of Phi 30 mum-Phi 50 mum and length of 2mm-6mm; 5) back layer shell preparation; 6) slurry sealing; 7) calcination, cooling and tapping off. The preparation method has the advantages that the shell is high in humidity and strength, and low in shell residual strength; the high-temperature air permeability is not affected after the fiber is burned at a high temperature; the effect of improving metal liquid mold-filling capacity to a certain degree is achieved; the number of coating and smearing layers is decreased; the production efficiency is improved.

A silent power capacitor of the present invention comprises a casing, a core and a core encapsulation film arranged in the casing, an outlet terminal fixed outside the casing, and core lead wires; the core is coated with an encapsulation film; the encapsulation The membrane is composed of two base films and a network skeleton layer sandwiched therein, and the space between the two base films and the network skeleton layer is filled with plastic damping grease. Through the compounding of two layers of base film and plastic damping grease, a practical and convenient core outsourcing structure is provided, which can not only fasten the core and protect the lead wire structure well, but also satisfy the insulation between the core and the shell, and due to the double The setting of the base film can strengthen its structural characteristics and effect, reduce the number of coating layers, and simplify the product process; use plastic damping grease as the receptor, effectively reduce the operating noise of the power capacitor, and achieve a quiet effect; at the same time, because the damping grease is composed of Composite with special polymer materials with good electrical insulation, which enhances the insulation effect and improves the scope of application and withstand voltage level of the product.

The invention relates to low-VOC polyurethane high-light varnish and a preparation method therefor. The low-VOC polyurethane high-light varnish is prepared from components A and B in a ratio of 1: (0.6-1). The component A is prepared from the following materials in parts by weight: 90-100 parts of high-solid low-viscosity alkyd resin, 0.1-0.5 part of a flatting agent, 0.1-0.5 part of a defoamer, 1-10 parts of a resin modifier and 15-25 parts of a composite environmental-friendly solvent; the component B is prepared from the following materials in parts by weight: 50-70 parts of TDI-TMP, 10-30 parts of a HDI tripolymer and 20-40 parts of butyl acetate. The low-VOC polyurethane high-light varnish provided by the invention has the benefits that the low-VOC polyurethane high-light varnish can be used for reducing the content of VOC during coating construction, so that the varnish not only is environmental-friendly, but also achieves a consumption tax-free purpose; as the solid content in construction is high, the number of coating layers of paint can be reduced, so that the cost is lowered and the raw materials are saved; the film is bright, the fullness is high and the grade of wood lacquer is improved.

The invention relates to a write-once-only optical record medium, which comprises a baseplate and a film coated on the baseplate. The coated film comprises a record layer and a reflecting layer connected with the record layer. The record layer primarily contains germanium, antimony and silicon or the mixture of any two elements of germanium, antimony and silicon. The reflecting layer primarily contains aluminium, copper, silver and aurum or alloy consisting of two elements of aluminium, copper, silver and aurum. When a writing and recording laser emit to the coated film, local material constituents change and react at the interface area of the record layer and the reflect layer, thus forming a record point as a digital signal source. As the record layer is made of inorganic materials which can grow by adopting the direct current sputtering technology, and the manufacturing process of products is minimized, the production cost is significantly reduced, and the production efficiency is improved.

The invention discloses a high-refractive-index transparent holographic film production process, which belongs to the field of laser anti-counterfeiting technology. The process includes preparation of high-refractive-index coating liquid, coating of high-refractive-index coating liquid, and low-temperature film-forming of coating liquid And UV pre-curing, in-line molding and UV light complete curing and transparent holographic film winding, the above-mentioned production process uses a high refractive index coating liquid to combine the information layer and the medium into one to form a composite coating, so that the prepared The transparent holographic film has the characteristics of high refractive index, high transparency and signal-to-noise ratio, excellent wear resistance and aging resistance, and obvious contrast of holographic images, thus breaking through the technical bottleneck of traditional transparent holographic images that are difficult to track and locate due to low contrast. It really achieves the arbitrary positioning of the transparent holographic pattern in the certificate card, and improves the comprehensive anti-counterfeiting effect of the transparent holographic pattern.

The invention relates to an optical scanning galvanometer of super high reflectivity, which is composed of a glass substrate layer and a highly-reflective film deposited and plated on the glass substrate layer. The highly-reflective film is composed of nine film layers, which are sequentially, according to the distance from the glass substrate layer from small to large, a first Al2O3 film layer, an Ag film layer, a second Al2O3 film layer, a first SiO2 film layer, a first high-refractivity material film layer, a second SiO2 film layer, a second high-refractivity material film layer, a third SiO2 film layer, and a third high-refractivity material film layer. The beneficial effects are as follows: the reflection bandwidth and resonance angle are increased greatly while the number of coating layers is reduced; the reflection bandwidth with the reflectivity higher than 99% is up to 300nm; and the effective resonance angle can be 0-80 degrees.