41results about How to "Membrane surface smooth" patented technology

The present invention relates to a filtering membrane packet which consists of five layers of materials at least, wherein, the central layer is filtering support gridding; the two sides of the filtering support gridding are provided with filtering support cloth respectively; the outer side of the filtering support cloth is provided with a filtering membrane respectively; the five layers of materials form a membrane packet with an integral closed structure. The surface of the membrane packet is provided with at least one collecting port used for leading filtrate in the membrane packet out. Thepresent invention also provides a membrane biological reactor which uses the filtering membrane packet. The membrane biological reactor comprises a membrane packet component, an aerator pipe component, a filtrate collecting pipe component and a frame fixing component used for fixing the components into a whole. The present invention uses five layers of materials of the filtering support gridding,the filtering support cloth and the filtering membranes to form the membrane packet, the membrane surface is flat and is not dirty easily; the membrane biological reactor using the membrane packet issimple for aerating and flushing and has the small size of membrane components, the high quality of produced water, strong anti-pollution capacity, long service life of the membrane, easy maintenanceand low manufacturing cost; and the present invention requires the user to invest low cost so that the membrane biological reactor can be popularized and applied widely.

The invention discloses a lithium battery composite diaphragm coated with a surface modified PMMA / PVDF mixture and a preparation method thereof; the lithium battery composite diaphragm comprises a battery diaphragm and a PMMA / PVDF mixed diaphragm coated on one side or both sides of the battery diaphragm Coating, the PMMA / PVDF hybrid coating comprises PMMA particles modified on the surface of the coupling agent and PVDF particles modified on the surface of the coupling agent. The present invention uses a coupling agent to modify the surface of PMMA and PVDF, which solves the problems of uneven mixing and easy sedimentation of PMMA and PVDF, makes the coated film surface smooth, and has a high yield rate, and effectively improves the mechanical properties and performance of the diaphragm. Adhesive, increased electrolyte absorption, improved ionic conductivity.

The invention relates to a self-supporting bag packaging material that can be opened in a straight line and a preparation method thereof, belonging to the technical field of self-supporting bags. The self-supporting bag packaging material is a composite film, and the composite film comprises a BOPP film layer, an ink layer, Aluminum foil layer and PE layer, PE layer includes corona layer, intermediate layer and heat sealing layer. The interlayer peeling force of the self-supporting bag composite film material prepared by the invention is 3-3.5N / 15mm, which is beneficial to the easy tearability of the composite film; and the Elmendorf tearing strength is small, so that the prepared self-supporting bag can be easily torn Open; it can be manually torn open without the need for easy tearing, and can be easily torn without laser tearing lines, and the tear opening is in a straight state; greatly improving the user experience.

The invention discloses a double-sided antistatic ultra-light PET release film and a preparation method thereof. The release film includes a PET base film layer, and the PET base film layer is coated with an antistatic coating on both sides, and one side is coated with an antistatic coating. A release layer is coated on the layer, wherein the release agent used in the release layer comprises the following raw materials in parts by weight: 90-110 parts of methyl vinyl siloxane polymer, 20-30 parts of silicon dioxide dilution , non-reactive octamethylcyclotetrasiloxane polymer 25-35 parts, silane coupling agent 20-30 parts, composite organofunctional siloxane 12-20 parts, platinum catalyst and vinyl siloxane polymer 20-30 parts of the mixture and 350-500 parts of the organic solvent, the release layer of the present invention is evenly coated, the product has excellent antistatic effect, the release force and antistatic value are stable under normal temperature and high temperature conditions, and the product stability is better.

The invention discloses a preparation method of a polyvinyl alcohol composite film with embedded silver-wrapped nanoparticles, comprising the following steps: (1) preparing a polyvinyl alcohol-silver nitrate solution; (2)preparing a polyvinyl alcohol-silver nitrate film by using spin coating method or casting film method; and (3) irradiating the polyvinyl alcohol-silver nitrate film with ultraviolet light. The prepared composite film has the characteristics of uniform metal nanoparticle size distribution, controllable dimension, uniform shape, and uniform dispersion.