6results about How to "Small dimensional change rate" patented technology

The invention discloses a high-strength self-leveling floor material and application thereof, and the high-strength self-leveling floor material comprises the following components: 300-400 parts by weight of cement; 30 to 50 parts by weight of limestone powder; 5 to 10 parts by weight of silica fume; 3 to 6 parts by weight of bentonite; 0.1 to 0.5 part by weight of polyvinyl alcohol; 5 to 8 parts by weight of redispersible latex powder; 0.1 to 0.3 part by weight of an air entraining agent; 0.5 to 2 parts by weight of a plasticizer; 0.5 to 1 part by weight of hydroxyethyl cellulose; and 1-2 parts by weight of a stabilizer. The high-strength self-leveling floor material with high fluidity, small size change rate and high compressive strength can be obtained by utilizing component selection of the composition, the weight ratio of the components and the synergistic relationship among the components, and self-leveling floor construction is utilized.

The invention discloses a non-woven material with high water absorbability for a facial mask and a preparation method of the non-woven material, and belongs to the technical field of non-woven materials, the preparation method comprises the following steps: preparing micro-crosslinked gel particles, preparing nano microspheres, preparing a first fiber web, preparing a second fiber web, spunlacing, dipping for the first time, dipping for the second time and post-processing; the preparation of the micro-crosslinking gel particles comprises the following steps: preparing a mixed solution, and carrying out micro-crosslinking; the method for preparing the nano microspheres comprises the following steps: silanization and grafting; the prepared non-woven material for the mask has high water absorption performance, the size change rate after water absorption is small, obvious sticky feeling cannot be generated in the using process, the formula of a mask material body cannot be affected, collapse of a fiber structure cannot be caused, transmission of effective components cannot be affected, water molecules are easily released after water absorption, and the non-woven material for the mask has a good water absorption effect. The water replenishing effect is good.

This invention relates to the field of preparation method technology and discloses a method for preparing a low-density nylon foam material. The method includes selecting nylon resin as the matrix material, wherein the nylon resin is a blend of PA6 and amorphous nylon PA610 in a specific ratio, wherein the mass ratio of PA6 to PA610 is 60:40 to 80:20, and the melt strength of the nylon resin is greater than or equal to 18 Pa·s; introducing a composite foaming agent, wherein the composite foaming agent is a combination of a chemical foaming agent and a physical foaming agent; and adding a nucleating agent, wherein the nucleating agent is nano-sized silica, nano-clay, talc, or a combination thereof, wherein the mass content of nano-silica is 0.5% to 2.0%. This invention can maintain stable dimensions and mechanical properties in humid environments and has a uniform and stable cell structure.

This application relates to the field of flexible electronics technology, and more particularly to multilayer flexible electronic devices, their fabrication methods, and applications. The fabrication method includes: providing a film unit, comprising a flexible film and a circuit bonded to a surface of the flexible film, wherein the surface of the film unit with the circuit bonded is designated as a first surface, and the surface opposite to the first surface is designated as a second surface; immersing the film unit and a first substrate in a liquid, performing a first bonding treatment on the first surface and the surface of the first substrate, and removing the film unit from the liquid to obtain a film composite unit; using the first surface of the film unit that has not undergone the first bonding treatment as a front surface, and the second surface of the film composite unit as a rear surface, performing a second bonding treatment on the front and rear surfaces; peeling the first substrate in the film composite unit after the second bonding treatment, so that the first surface in the film composite unit forms a new front surface; repeating the second bonding treatment and peeling treatment steps to obtain a multilayer flexible electronic device.

The application relates to the technical field of special glass, and provides a glass substrate, chemically strengthened glass and a strengthening method and cover plate glass. The glass substrate provided by the application comprises the following components in terms of the total mole content of oxides in the glass substrate: SiO2: 58-68%; Al2O3: 7.5-9.2%; Na2O: 11.3-14.5%; K2O: 2.5-5%; MgO: 7.5-10.2%; B2O3: 0-2%; ZnO: 0.1-2%; and WO3: 0.1-4%. The size change rate of the glass substrate provided by the application is less than or equal to 0.015% before and after chemical strengthening. During the chemical strengthening process, the glass substrate needs to be inserted into a holder, and then the glass substrate and the holder are placed in a strengthening salt bath for strengthening. Since the size change rate of the glass substrate provided by the application is small, the holder does not need to reserve a large size change gap, and the risk of glass film falling can be obviously reduced.

The invention provides a method for manufacturing an FRP precursor and a method for manufacturing FRP, wherein the size change rate of FRP before and after copper foil etching and heat drying is reduced. Specifically, provided is a method for producing an FRP precursor by a step in which a thermosetting resin film is adhered to at least one surface of a sheet-like aggregate, and after the adhesion, a step in which the FRP precursor is conveyed while applying a tension of 1.5-5.5 N / 25 mm to the FRP precursor.