230 results about "Folding endurance" patented technology

An acrylic resin film, in which acrylic elastic particles are mixed with an acrylic resin containing glutaric anhydride units, has a total light transmittance of 91% or more, a haze value of 1.5% or less, a folding endurance value (times) of 20 or more, and a heat shrinkage rate of less than 5% at least in either the machine direction or the transverse direction in a heat shrinkage test.

The invention relates to a method for preparing an aqueous polyurethane adhesive and superfine fiber synthetic leather, which belongs to the technical field of chemical products and preparation methods thereof. The method is characterized by comprising the following steps: mixing polyester polyol, isocyanate, a hydrophilic chain extending agent, a micromolecule chain extending agent and an amine environment friendly catalyst to obtain a hydrophilic aqueous polyurethane prepolymer; adding a neutralizing agent to the aqueous polyurethane prepolymer to obtain an aqueous polyurethane latex; then adding an amine chain expanding agent, a thickening agent, a defoaming agent and a flatting agent to the aqueous polyurethane latex to obtain the aqueous polyurethane adhesive; coating the aqueous polyurethane latex on release paper; drying the release paper; then coating the aqueous polyurethane adhesive on the dried release paper; and pressing the release paper and base cloth together to obtain the superfine fiber synthetic leather. The high solid content aqueous polyurethane adhesive prepared by the method has better initial tack and rebound resilience and higher final strength, and the prepared superfine fiber synthetic leather has higher peel strength and low-temperature folding endurance. The preparing process of the method greatly reduces the use and the discharge of organic solvents, reduces the energy consumption and furthest reduce the environmental pollution.

An electrically conductive adhesive composition which has flexibility and folding endurance and is feasible for use as a shield against electromagnetic waves from a flexible printed circuit, comprises 100 parts by weight of (a) an acrylonitrile-butadiene copolymer, 20 to 500 parts by weight of (b) a phenolic resin and/or an epoxy resin, 1 to 100 parts by weight, per 100 parts by weight of the components (a) and (b) in total, of (c) an electrically conductive filler and 1 to 50 parts by weight, per 100 parts by weight of the components (a) and (b) in total, of (d) a bromine-containing flame retardant.

An electronic cigarette case comprising a cigarette case main body, a case cover, and a connection structure connected to the cigarette case main body and to the case cover is provided. The cigarette case main body, the case cover, and the connection structure are integrally formed. Since the electronic cigarette case comprising the cigarette case main body, the case cover, and the connection structure is designed to be integrally formed, and since the integrally formed cigarette main body, case cover, and connection structure are made of a material with great flexibility, the electronic cigarette case is of good folding endurance, simple processing technology, and high production efficiency, and thus production costs is reduced greatly.

The present invention discloses a bleached chemical pulp prepared by using graminoid plant as raw material and its preparation method. Said invention is characterized by that it utilizes a high-hardness pulp which is obtained by using cooking process and whose permanganate number is 16-28 and equal to Kappa number 26-50 and makes said high-hardness pulp undergo the processes of pulp-washing and bleaching treatment so as to obtain the invented bleached chemical pulp whose breaking length is 4500-8000 m and folding endurance is 20-70 times.

An object of the present invention is to provide a graphite film, and a graphite composite film both having an excellent thermal diffusivity which can sufficiently manage heat dissipation of electronic instruments, precision instruments and the like, along with an excellent flex resistance which can withstand application to bent portions.

Means for Resolution of the present invention is a graphite film exhibiting the number of reciprocal foldings being 10,000 times or more as measured using a rectangular strip test piece having a width of 15 mm until the test piece breaks in a MIT folding endurance test under conditions of: a curvature radius R of the bending clamp being 2 mm; a left-and-right bending angle being 135°; a bending rate being 90 times/min; and a load being 0.98 N.

The invention relates to a halogen-free and phosphorous-free flame-retardant synthetic resin adhesive used for a flexible copper clad laminate, in particular to the adhesive used for producing the flexible copper clad laminate. The adhesive comprises the following components: biphenyl epoxy resin, elastomer modified epoxy resin, a flexibilizer, a curing agent, a curing accelerator, an inorganic filler and an organic solvent. The halogen-free and phosphorous-free flame-retardant synthetic resin adhesive is halogen-free and phosphorous-free, is environmental-friendly and achieves fire retardance up to level UL94V-0; and the flexible copper clad laminate produced by using the adhesive has the characteristics of high folding endurance, high fire retardance, dip-soldering resistance, high peel strength, low water absorption and high dimensional stability.

An ultraviolet photocurable sand-texture ink consists of acrylate resin 20-60 proportion, acrylate monomer 10-50 proportion, light initiating agent 3-10 proportion, initiating improver 3-15 proportion, wax powder 3-10 proportion and auxiliary 0.3-5 proportion. It has excellent grinding effect, adhesion and folding endurance. It can be used high-level package printin.

The invention discloses a surface blackening treatment method for a rolled copper foil. The surface blackening treatment method orderly comprises the following steps: (1) electrochemical oil removal, (2) coarsening treatment, (3) solidification treatment, (4) nickel-cobalt plating treatment, (5) zinc plating treatment, (6) passivation, (7) silicone coupling agent coating treatment, and (8) drying treatment, and obtaining the product. Current is applied in step (1) to step (6). The surface blackening treatment method for a rolled copper foil provided by the present invention has the advantage that the black appearance of the copper foil obtained after various electric plating steps meets FPC requirements. Through determination, the copper foil has a surface color blackness value of less than 30, surface roughness Ra of less than or equal to 1.0 micron and Rz of less than or equal to 2.0 microns, peel strength of more than 1.4 N/mm, and folding endurance MIT of more than 800; the copper foil has favorable acid resistance, alkali resistance, soldering resistance, and etching performance. With the blackness value RAL7016, a good extinction effect is achieved.

To provide a two-layer flexible substrate having excellent folding endurance, etching properties, and resist adhesiveness with no surface defects.

A copper electrolytic solution containing chloride ions, a sulfur organic compound and polyethylene glycol as additives, and the copper electrolytic solution preferably contains 5 to 200 ppm of chloride ions, 2 to 1000 ppm of a sulfur organic compound and 5 to 1500 ppm of polyethylene glycol. A two-layer flexible substrate having a copper layer formed using the copper electrolytic solution, wherein the MIT folding endurance is 100 or more, and the surface roughness (Rz) of the copper layer is 1.4 to 3.0 μm.

The invention provides a flexible wiring board for repeated folding sections which exhibits excellent folding endurance, and a flex-rigid wiring board comprising the flexible wiring board as a section thereof. The flexible wiring board for repeated folding sections of the invention comprises a wiring patterned base film layer (11), a flexible insulating material layer (12) covering the layer (11), and a cover film layer (13) covering the layer (12).

The invention discloses a chip on film packaging structure, which comprises a flexible substrate, a lead layer, an insulating layer and an elastic layer. The flexible substrate has a surface; the lead layer is formed on the surface and is provided with a plurality of leads; the insulating layer is formed on the lead layer; and the elastic layer is formed on the insulating layer and corresponds to at least one of the leads. When the flexible substrate is bent under the action of an external force, the elastic layer can buffer the deformation of the corresponding lead. Therefore, the rupture, caused by over deformation, of the corresponding lead can be avoided. The invention also provides a chip on film packaging method, which can improve the folding endurance of the chip on film packaging structure so as to solve the problem of the prior art.

The invention discloses a glass fiber filter material and a preparation method thereof. The filter material comprises a base fabric, wherein the upper surface and the lower surface of the base fabric are respectively provided with a non-woven layer, and at least one of the non-woven layers is internally and externally provided with a foam coating layer respectively. The preparation method of the glass fiber filter material comprises the following steps of: manufacturing the glass fiber filter material, preparing finishing agent, generating foam, coating, and drying. The glass fiber filter material is subject to foaming layer arrangement, and the concentration of the finishing agent is increased, so that the finishing agent is distributed in the filter material more evenly, the migration phenomenon is reduced, and a mass of water resource, electric energy and heat energy are saved; after the glass fiber filter material is finished, and the gluing quantity of the filter material is decreased to 7-15% from 12-25% during finishing in a leaching way, so that the glass fiber filter material is even in distribution of the gluing quantity, good in flexibility, stable in quality, chemical corrosion-resistant, good in water resistance and oil resistance, easy to dedust, easy for industrial production, free of the existing water and energy-wasting step of finishing in a padding way, goodin folding endurance, and long in service life at about 15 months.

The invention provides a heat-resistant basalt fiber filter material and a preparation method thereof. The filter materials of the invention can be used in environment of ultra-high temperature, and has excellent folding endurance, corrosion resistance and abrasive resistance. The preparation method of the heat-resistant basalt fiber filter material has the technical scheme as follows: firstly, preparing a basalt fiber foundation and basalt fiber meshes; putting the basalt fiber foundation between the upper basalt fiber mesh and the lower basalt fiber mesh to be manufactured into the filter material; and preparing basalt fiber used for the basalt fiber foundation and then carrying out dipping treatment of teflon mix emulsion.

The invention discloses a compound filter material, a method and application thereof, and relates to a filter material. The invention provides a compound filter material which has good folding endurance, corrosion resistance and wear resistance and can be used as a high-temperature environment filter material, a method and application thereof. The compound filter material comprises the following components in percentage by mass: 1 to 99 percent of basalt fiber and 1 to 99 percent of polytetrafluoroethylene fiber. The preparation method comprises the following steps of: mixing the basalt fiber and the polytetrafluoroethylene fiber to obtain a mixed fiber; and adding an antistatic agent to the mixed fiber for mixing to obtain the compound filter material. According to the mass percentage, the adding amount of the antistatic agent is 0.1 to 20 percent of the mixed fiber. The compound filter material can be used for directly preparing composite filter cloth with single-layer structure or multi-layer structure, and the prepared composite filter cloth with single-layer structure or multi-layer structure can be used for producing a filter device.

The invention discloses an epoxy resin composition and a flexible copper-clad plate prepared from the same. The epoxy resin composition comprises brominated epoxy resin, rubber modified epoxy resin, butadiene-acrylonitrile rubber, a high-flexibility amine curing agent, an aromatic amine curing agent, a curing accelerator, an antioxidant, inorganic filler and an organic solvent. The flexible copper-clad plate prepared from the epoxy resin composition comprises a polyimide film, an epoxy resin composition coating coated on one or two faces of the polyimide film and a copper foil laminated on the epoxy resin composition coating. In the epoxy resin composition, the high-flexibility amine curing agent and the high-flexibility amine curing agent are taken as a composite curing system, so that the flexibility of the composition can be improved remarkably, the dosage of the butadiene-acrylonitrile rubber and the bromine content of the composition can be lowered, and the composition has high flexibility, flame retardance and heat resistance. The flexible copper-clad plate prepared from the composition has high heat resistance, peeling strength, dimensional stability, flexibility, folding endurance and processability.

The invention relates to a manufacturing method of a high-filtration anti-static tectorial membrane composite needled felt, which is characterized in that the composite needled felt is formed by that after being treated with anti-static processing, a composite needled felt plain felt is treated with hot pressing draping with a polyfluortetraethylene microporous membrane. The composite needled felt has good anti-static performance, high filtration efficiency and strong folding endurance, and the service life of the composite needled felt is greatly prolonged.

There is provided a decorative material which hardly undergoes deterioration of a substrate even when irradiated with an electron beam, and is excellent in surface properties such as stain resistance, abrasion resistance and marring resistance. The decorative material of the present invention comprises a substrate, and a pattern layer and/or a colored layer, and a surface protective layer which are successively laminated on the substrate, wherein the surface protective layer is obtained by crosslinking and curing an electron beam-curable resin composition, and a rate of reduction in a folding endurance of a material obtained by applying the electron beam-curable resin composition onto the substrate and then irradiating an electron beam to the electron beam-curable resin composition, relative to a folding endurance of the substrate before applying the electron beam-curable resin composition thereonto is 70% or lower as measured in the CD direction (lateral direction) of the substrate.

The invention discloses a powerful breathable fiber mid-sole material and a manufacturing method. The material is manufactured by taking polyester staple fibers, high-strength stretch yarns, polypropylene fibers and ES fibers as raw materials; loosening, mixing, carding, lapping, needling, ironing and reinforcing to form a non-woven substrate; and afterfinishing and processing the substrate, wherein (1) a blend fiber comprises the following components: 40 to 60 parts of 7.0D polyester staple fibers, 50 to 100 parts of 15D polyester staple fibers, 0 to 10 parts of POY staple fibers, 2 to 8 parts of the polypropylene fibers and 2 to 8 parts of the ES fibers; (2) padding finishing liquid for afterfinishing comprises the following components: 0 to 50 parts of modified butyronitrile latex (H), 0 to 50 parts of modified butyronitrile latex (S), 50 to 100 parts of carboxylic styrene butadiene latex, 25 to 75 parts of ground calcium carbonate, 50 to 100 parts of precipitated calcium carbonate, 10 to 25 parts of tapioca flour, 0 to 25 parts of titanium pigment and 0 to 1 part of seaweed powder. The material has the advantages of high folding endurance, powerfulness, breathability and the like, short production process flow, simple operation, high efficiency and low product cost.

The invention discloses a production formula of an enhanced multifunctional surface sizing assistant for papermaking and a preparation process. Specifically, the production formula involves: 5-15 parts of starch, 15-25 parts of a hydrophobic monomer, 2-15 parts of a hydrophilic monomer, 0-0.5 part of a crosslinking monomer, 0.1-5 parts of an initiator, 0.2-2 parts of glyoxal, 0-5 parts of a pH regulator, and the balance water. The sizing assistant prepared by the preparation process provided by the invention can enhance the strength indexes of paper and paper boards (like enhancing ring crush strength, bursting strength, folding endurance, moisture resistance and the like), also can endow paper and paper boards with good water resistance, meet the multipurpose sizing demands of paper and paper boards, and have good market prospects.

The invention provides a forgery-prevention composite cardboard used for the external packaging of cigarettes and a processing method of the forgery-prevention composite cardboard. The forgery-prevention composite cardboard for packaging the cigarettes is provided with a basal layer and a forgery-prevention layer compounded on the basal layer, wherein the basal layer and the forgery-prevention layer are bonded and compounded by composite glue, and the surface of the forgery-prevention layer is also provided with a coating layer. The processing method of the forgery-prevention composite cardboard comprises the following steps: respectively preprocessing a coating white cardboard or copper printing paper used as the basal layer and forgery-prevention paper used as the forgery-prevention layer, then compounding the basal layer and the forgery-prevention layer into a whole and finally, applying the coating layer to the surface of the forgery-prevention layer, wherein the preprocessing comprises the preheating treatment steps of tension control, corona treatment and the like. The forgery-prevention composite cardboard has favorable printing performance, also has very strong forgery-prevention property and folding endurance and very good stiffness and meets the mounting requirement of a cigarette packaging machine completely; the forgery-prevention composite cardboard is especially suitable for serving as paper used for the external packaging of the cigarettes.

It is an object of the invention to provide a two-layer flexible substrate that excels in folding endurance and free from occurrence of Kirkendall voids or the like even when lead portions of COF are plated with tin and heat treatment is performed. The present invention is directed to a two-layer flexible substrate in which a copper layer is provided on one or both faces of an insulating film by using a copper electrolytic solution, wherein an average size of copper crystal grains constituting the copper layer is equal to or greater than 1 μm and equal to or less than a thickness of the copper layer, and a ratio of peak intensity of (200) to a sum total of intensities of six principal peaks {[peak intensity of (200)]/[sum total of peak intensities of (111), (200), (220), (311), (400), (331)]} in the X-ray diffraction of the copper layer is equal to or greater than 0.4. The above copper electrolytic solution for forming the copper layer contains a chloride ion and one or more of thiourea, thiourea derivatives, and thiosulfuric acid as additives.

Ultraviolet curing ink comprises the following components in weight proportion: 24-35% of polyurethane acrylate, 14-25% of epoxy acrylate, 15-25% of tripropylene glycol diacrylate, 15-25% of 1,1,1-trimethylol propane triacrylate, 0.5-2.5% of 1,1'-(methylenedi-4,1-phenylene)bis[2-hydroxyl-2-methyl-1-acetone],0.5-1.5% of Oligo[2-hydroxy-2-methyl-1-[4-(1-methylvinyl)phenyl]propanone], 0.1-1% of polydimethylsiloxane, 0.1-1% of polyether modified polysiloxane and 1-5% of polyethylene wax. The invention further provides the preparation method of the ultraviolet curing ink. According to the ultraviolet curing ink, an ink printing layer with a wrinkle effect is formed after the ultraviolet curing ink is cured after printing, and the ink printing layer has good anti-yellowing performance and good folding endurance.

The invention discloses biological aqueous polyurethane resin, a preparation method therefor and an application of the biological aqueous polyurethane resin. The biological aqueous polyurethane resinat least comprises the following ingredients in parts by mass: 70-100 parts of biological macromolecular polyol, 15-30 parts of biological isocyanate, 0.02-0.2 part of graphene oxide. According to thebiological aqueous polyurethane resin, the preparation method therefor and the application of the biological aqueous polyurethane resin, properties such as folding endurance, wear resistance and mechanical properties of the biological aqueous polyurethane resin can be improved.