53results about How to "Reduce heat shrinkage" patented technology

The invention discloses a microwave modification method of plant fiber and application thereof. The method comprises the steps of: firstly smashing the plant fiber; preprocessing the smashed plant fiber with coupling agent; and processing the preprocessed plant fiber by means of microwave radiation, so that the coupling agent is grafted at the surface of the plant fiber to obtain the microwave-modified plant fiber, wherein the microwave-modified plant fiber can be used as filling material of composite material for the field of high molecular material. The modification method is environment-friendly, and has no pollution, low production cost and remarkable economic benefit; and the microwave-modified plant fiber has obvious polarity change, wherein the nonpolarity is obviously enlarged, thereby obviously improving the interface consistency with non-polarity high molecule substances and improving the combination property of the composite material.

It is an object of the present invention to provide an optical film having low heat shrinkage and a method for producing the same. A heat treatment (60) carrying a biaxially stretched film of a thermoplastic resin (12′) prepared by biaxial stretching in a heated atmosphere is conducted, and/or a heat treatment (70) carrying the biaxially stretched film while bringing the biaxially stretched film into contact with a heating roller (72) is conducted.

The invention discloses a polyester woven label and a preparation method thereof. The preparation method includes following steps: (1), warp pretreatment; (2), weft selection; (3), pattern printing; (4), label weaving; (5), cutting and slitting. The polyester woven label made by the preparation method does not need to go through wash care and ironing processes, and the polyester woven label is less prone to wrinkling and contracting when being subjected to subsequent dyeing and wash care at 60-100 DEG C and press-ironing and drying at 100-160 DEG C. By using the preparation method, production period is shortened, production cost is lowered, fastness of the woven label in each aspect can be controlled at four or higher grade, and heat shrinkage rate of the woven label can be controlled below 3%.

An interlayer insulation film is etched to form contact holes in an integrated circuit part. At this time, a trench is not formed in a guard ring part. Subsequently, ion implantation is carried out in source/drain regions in a peripheral circuit part for contact compensation, and high-temperature annealing is carried out in order to activate implanted impurities. Subsequently, an interlayer insulation film, a storage capacitor, and another interlayer insulation film are formed in sequence. Then, contact holes reaching a part of wiring layers are formed in the peripheral circuit part while, in the guard ring part, a trench reaching a diffusion layer is formed. Next, a barrier metal film is formed in each of the contact holes and the trench, and further, a contact plug comprising, for example, a W film is buried therein.

The invention belongs to the technical field of lithium ion batteries and relates to a lithium ion battery diaphragm, a preparation method and a lithium ion battery. The lithium battery diaphragm provided by the invention is of a two-layer film structure which comprises a high-molecular polymer film and a polytetrafluoroethylene microporous film; a binder is applied between the high-molecular polymer film and the polytetrafluoroethylene microporous film. The diaphragm provided by the invention integrates the advantages of both sub-films, including a closing function at relatively low temperature, fairly strong strength and excellent high-temperature resistance; the diaphragm can be used stably at 200 DEG C, a complete structure is maintained at 250 DEG C, the safety performance of the battery is remarkably enhanced, and the safety of the battery is guaranteed in needling, impact and other unfavorable conditions.

A bag of a heat shrinkable, gas-barrier thermoplastic film for packaging an item comprises a first seal adjacent a bottom edge and connecting first and second side edges, and defining an area between it, the side edges and a top edge for receiving the item, a second seal along the bottom edge or between the bottom edge and the first seal and connecting the side edges, and having a shaped portion adjacent a corner of the bag at the first side edge and the bottom edge which projects towards the top edge, and a precut extending from the bottom edge towards an apex of the shaped portion, the first seal extending from the second side edge towards the shaped portion at a level below the apex and around the shaped portion to the first side edge, and a manually graspable tab being formed between the first side edge, the first and second seals adjacent the first side edge and the shaped portion.

The invention provides a heat-shrinkable polyester film with high mechanical strength in a width direction that is orthogonal to the main shrinking direction and high tensile rupture elongation in the film width direction after being subjected to an aging treatment in a high-temperature environment. The heat-shrinkable polyester film is made from a polyester resin containing ethylene terephthalate as the main component and a monomer component that can serve as an amorphous component in an amount of 0 mol % or more and less than 1 mol % relative to the total amount of polyester resin components.

The invention provides a polyvinyl chloride film suitable for coating of a hot melt pressure sensitive adhesive and a preparation method of the polyvinyl chloride film. The polyvinyl chloride film suitable for coating of the hot melt pressure sensitive adhesive is mainly prepared from the following components in specific parts by mass of polyvinyl chloride resin, a polymeric plasticizer, a stabilizing agent and a filler. The polyvinyl chloride film suitable for coating of the hot melt pressure sensitive adhesive has excellent high-temperature-resistance, and is low in heat contraction percentage, and the thickness deviation of the polyvinyl chloride film can be controlled to 5 micrometers or below, through two thickness control units, the width of the polyvinyl chloride film can be made to be 2.5 meters or above. The preparation method of the polyvinyl chloride film suitable for coating of the hot melt pressure sensitive adhesive, disclosed by the invention, is simple in technology, high in production efficiency and suitable for mass production.

The invention provides a semiconductive shielding material and a preparation method and application thereof. The semiconductive shielding material comprises the following components: an ethylene-butyl acrylate copolymer, high-density polyethylene, conductive carbon black, PE wax, zinc stearate, a dispersing agent and an antioxidant. The mass ratio of the ethylene-butyl acrylate copolymer to the high-density polyethylene is 1:(0.05-0.2), preferably 1:(0.07-0.1). According to the semiconductive shielding material, the ethylene-butyl acrylate copolymer is used as a matrix, and the high-density polyethylene is added, so that the material has a skeleton supporting effect after being extruded, an insulating layer is prevented from being separated from a shielding layer, and a stress cracking phenomenon in a vulcanization process is prevented.

The invention relates to an optical reflective film, especially to a preparation method of a low-thermal-shrinkage polyester polyester reflective film. In order to reduce thermal shrinkage of existing polyester reflective films, the invention provides a preparation method of a low-thermal-shrinkage polyester polyester reflective film. The polyester reflective film has an ABA three-layer co-extrusion structure. The B layer of the polyester reflective film has a foam structure therein. The preparation method comprises the following steps: (1) mixing raw materials for preparation of the polyester reflective film, melting and plasticizing, extruding by a three-layer co-extrusion process, and cooling a casting strip; longitudinally stretching the obtained casting strip and then transversely stretching; (2) carrying out heat-setting on the film obtained in the step (1) at the heat-setting temperature of 220-240 DEG C; and cooling and then carrying out heat treatment at the heat treatment temperature of 60-120 DEG C. The reflective film provided by the invention has low thermal shrinkage, excellent reflectivity and high stiffness.

The invention discloses a preparation method of superfine glass fiber, and the method comprises the following steps: S1, soaking glass fibers in a sodium hydroxide aqueous solution, washing, drying, uniformly dispersing in an organic solvent to obtain a solution A, adding diisocyanate and a catalyst, reacting, filtering, and washing a filter cake to obtain an intermediate material; and S2, uniformly dispersing the intermediate material in an organic solvent to obtain a solution B, adding diamine into the solution B in an inert gas atmosphere for reaction, filtering, washing a filter cake, anddrying to obtain the superfine glass fiber. The invention further discloses the superfine glass fiber which is prepared according to the preparation method of the superfine glass fiber. The inventionalso discloses application of the ultrafine glass fiber in a polyimide film. The invention further discloses a low-heat-shrinkage polyimide film. The surface of the prepared superfine glass fiber is grafted with-NH2, and the superfine glass fiber can be combined with polyimide to achieve the effects of reducing thermal shrinkage of the polyimide film and maintaining mechanical properties.

The invention discloses a cable sheath and relates to the technical field of high molecular plastic. The cable sheath comprises, by weight, 50-70 parts of crosslinked polyethylene, 5-9 parts of plasticizer, 6-10 parts of lead-free stabilizer, 12-15 parts of antioxidant, 8-12 parts of blending modifier, 20-25 parts of glass fiber, 15-25 parts of polyether-ether-ketone and 10-15 parts of polyether sulfone. Compared with the prior art, the cable sheath has the advantage that thermal shrinkage degree of the cable sheath can be lowered.

The invention discloses a modified polyimide nanofiber membrane. The nanofiber membrane is prepared from a solution containing the following raw materials in percentage by mass: 0.01%-0.5% of sulfonated graphene oxide, 5%-20% of modified polyimide and the balance of an organic solvent by spinning. The nanofiber membrane has higher porosity and uniform pore size distribution, and has good high-temperature stability and electrochemical stability. On the other hand, the nanofiber membrane has good liquid absorption and wettability and can fully contact with an electrolyte; besides, the nanofibermembrane has the characteristics of high ionic conductivity and low interface contact resistance, so that the nanofiber membrane can be used as a separator in preparation of a lithium ion battery, cycle performance of the lithium ion battery is improved, and use safety of the battery is effectively improved.

A separator having a polyolefin substrate, first coating layer including first inorganic particles on at least one surface of the polyolefin substrate and a second coating layer including second inorganic particles on a surface of the first coating layer opposite the polyolefin substrate, An average particle size of the first inorganic material particles of the first coating layer is greater than an average particle size of the second, inorganic material particles of the second coating layer. The first inorganic particles of the first coating layer are 900 nm or more based on. D50, and the second inorganic particles of the second coating layer are 10 nm or more and 500 nm or less based on D50.

The invention provides a lithium ion battery diaphragm, a lithium ion battery and a preparation method of the lithium ion battery diaphragm. The lithium ion battery diaphragm comprises a base membrane and a ceramic coating covering the surface of the base membrane, and the ceramic coating comprises the following raw materials in parts by weight: 1 part of aluminum oxide; 0.01 to 0.02 part of a thickening agent; 0.008 to 0.012 part of a solution type water-based adhesive; 0.03 to 0.05 part of an emulsion type water-based adhesive; 0.001 to 0.01 part of a dispersing agent; and 0.0001 to 0.0005 part of a wetting agent. The lithium ion battery diaphragm disclosed by the invention has relatively good thermal shrinkage performance and puncture strength, and the safety of the battery is improved.