148 results about "Thermal shrinkage" patented technology

This invention relates to the field of packaging film technology and provides a low-temperature polyolefin packaging film and its preparation method. The packaging film comprises a three-layer co-extruded structure consisting of an outer layer, a middle layer, and an inner layer. The components of each layer are as follows: Inner layer: metallocene polyolefin, high-performance polypropylene, modified lignin nanofibers, and erucamide / silica composite microspheres; Middle layer: PCR, modified nano-kaolinite, and trimethylolpropane triacrylate; Outer layer: PCR, modified tourmaline nanotubes, benzoyl peroxide microcapsules, and polydopamine-coated chitosan. This invention uses PCR, which is more energy-efficient and environmentally friendly. The addition of modified lignin nanofibers to the inner layer improves tensile strength; the addition of modified nano-kaolinite to the middle layer improves thermal shrinkage; the addition of modified tourmaline nanotubes to the outer layer lowers the crosslinking reaction initiation temperature and improves shrinkage; and the addition of polydopamine-coated chitosan allows for reversible recombination upon damage, improving puncture strength.

The application discloses a glass fiber separator for lead-acid storage batteries and a preparation process thereof and belongs to the technical field of automobile lead-acid storage batteries. The separator is prepared from superfine glass fibers as a base, with the addition of nano-silicon dioxide fillers, nano-attapulgite-nano-boron nitride modifiers, dispersants, binders and acid-resistant stabilizers, and is prepared through wet papermaking, segmented drying and hot-pressing shaping. The separator has the advantages of high porosity, fast acid absorption speed, high tensile strength, acid-erosion resistance and low thermal shrinkage rate, and the 100% DOD cycle life of an assembled battery can reach 912 times, the service life of a starting battery for an automobile is significantly prolonged, the process is stable and environment-friendly, and the process is suitable for industrial mass production.

A base film for use in laminating with a sealing film to form a packaging film, the base film being composed of a stretched film made of a polyethylene resin having a density of 0.95 g / cm 3 The above at least one base layer having high-density polyethylene as a main component, the base film having a heat shrinkage rate in a stretching direction of less than 5% at 120°C and a tensile elastic modulus of 2000 MPa or more.

The present application relates to the technical field of packaging materials, and relates to a puncture-resistant POF film and a preparation method thereof. The POF film adopts a three-layer co-extrusion structure, the outer layer comprises polyethylene and high-transparency modified polyamide masterbatch, the middle layer comprises polypropylene and high-transparency modified polyamide masterbatch, and the inner layer is a polyethylene layer. The high-transparency modified polyamide masterbatch comprises tool nylon matrix, organic montmorillonite, nucleating agent and reactive compatibilizer. The preparation method comprises the following steps: respectively melting and plasticizing the raw materials of each layer, co-extrusion blowing film, blowing, cooling and shaping, corona treatment and winding. The present application introduces modified polyamide masterbatch into the outer layer and the middle layer of the POF film, improves the puncture resistance of the POF film while basically maintaining high transparency and good heat shrinkage performance, and solves the problem that the traditional POF film is easy to be punctured.

The present invention provides a decorative laminate member capable of imparting high designability and excellent adhesion and suppressing generation of warping, and a decorative molded body comprising the same. A decorative laminate member having a transparent coating film layer (A), a resin substrate layer (B), a design layer (C), an adhesive layer (D), and a heat-resistant film layer (E), characterized in that the heat shrinkage rate of the decorative laminate member when heated from 35°C to 105°C and then cooled from 105°C to 35°C is 0% or more and 3.0% or less.

The objective is to provide a stretched film that has excellent water vapor barrier properties and heat resistance, as well as excellent transparency. [Solution] The stretched film has a density of 0.950 g / cm³. 3 The main component is polyethylene, and the water vapor transmission rate per 100 μm is 1.0 g / m². 2 The film has a minimum of 10 days, a haze of 20% or less, and a thermal shrinkage rate of 10% or less when heated at 100°C for 10 minutes in the MD (Metal Dynamics) of the film.

This invention discloses a separator, its preparation method, and its application, belonging to the field of battery separator technology. Addressing the technical problems in existing battery separators where thinner membranes cannot simultaneously achieve optimal air permeability, mechanical properties, thermal shrinkage rate, and flatness, the separator provided by this invention comprises a single molecular weight polyolefin with a molecular weight of 1 million to 5 million; when the separator thickness is 2μm to 5.5μm, the thickness difference is ≤1μm; and / or, air permeability of 50sec / 100cc to 140sec / 100cc; and / or, under high-temperature treatment at 105℃, a MD thermal shrinkage rate not exceeding 3% and a TD thermal shrinkage rate not exceeding 2%; and / or, 0.1Ω·cm 2 ~1.5Ω·cm 2 The internal resistance of the separator is low. The separator of this application has low thickness, low thermal shrinkage rate, high flatness and good ion conductivity. When used in the preparation of batteries, it can improve the energy density, cycle life and safety of lithium batteries.

Disclosed in the present invention are a PET protective film for a flexible electronic apparatus and a manufacturing method therefor. In the present invention, there are two mutually opposite properties in two perpendicular directions: in one direction, the PET protective film has a relatively high HCMR, which can represent foldability, resulting in the minimization of a crease depth, while in the other direction, the PET protective film has a relatively high tensile Young's modulus, which can represent a self-supporting property and rigidness and is one of the most important properties of protective films for flexible electronic apparatuses. In addition, other required properties, such as total light transmittance, haze and heat shrinkage, of the PET protective film for a flexible electronic apparatus of the present invention are similar to or slightly improved than those in the prior art. In order to obtain an extremely anisotropic PET film, the present invention uses stretching in one direction to achieve maximum unidirectional orientation and uses an annealing process to eliminate residual strain but maintain the unidirectional orientation of molecular chains. The technique achieves good heat shrinkage properties.

1. Name of the product in this design: Heat Shrink Baking Machine (Copper Busbar Conveyor Type). 2. Application of this design: for heat shrinking of heat shrink tubing and heat shrink film, as well as for adhesive curing, drying and baking of items. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The present invention provides a heat-shrinkable film that can adjust the heat shrinkage rate within a predetermined range, thereby exhibiting stable and excellent heat shrinkage properties and effectively preventing wrinkles and other defects. [Solution] A heat-shrinkable film having the longitudinal or widthwise direction as the main shrinkage direction, made of a predetermined resin, and in a predetermined time t1 to t3, t2

A fluororesin tube having tearing property in a lengthwise direction, the fluororesin tube being formed of one thermoplastic fluororesin different from polytetrafluoroethylene and having an inner diameter heat shrinkage ratio of 20% or more when heated in a gas phase at 200° C. for 5 minutes. A method for producing a fluororesin tube having tearing property, the method including a step of subjecting one thermoplastic fluororesin different from polytetrafluoroethylene to melt extrusion molding, wherein the fluororesin tube has an inner diameter heat shrinkage ratio of 20% or more when heated in a gas phase at 200° C. for 5 minutes, and wherein in the melt extrusion molding, a flow path of the molten thermoplastic fluororesin is temporarily branched to form a weld line in a lengthwise direction in the fluororesin tube.

The objective is to provide a fluorine-containing polymer film. This objective can be achieved by a fluorine-containing polymer film having a thermal shrinkage rate of 0.4% or less after heating at 90°C for 1 hour and a dielectric constant of 3 to 50 at 25°C and 1000 Hz, or by a fluorine-containing polymer film having a degree of crystallinity of 50% or more and an elongation at break of 400% or more.

This invention discloses a state detection and control method for an automated packaging system for food-grade PET bottles, belonging to the field of intelligent control of packaging equipment. Addressing the problem that existing packaging systems cannot dynamically adjust parameters based on individual bottle differences and batch quality fluctuations, this method sets up a detection module on the conveyor chain to acquire the weight, bottle outline, ellipticity, cap sealing ring status, bottle spacing, and condensate coverage of each bottle, and correlates these to form an individual state vector. The statistical distribution characteristics of multiple consecutive bottles are calculated to determine the degree of overall batch quality fluctuation, and based on this, a standard packaging mode, a compensating packaging mode, or a batch diversion warning is selected. In the compensating packaging mode, the individual state vector is input into a neural network, and a pre-compensation coefficient is output for advance adjustment. An acoustic detection device is installed at the heat shrink oven outlet, and the knocking spectrum analysis results are fed back to the neural network for online incremental learning. This method is used for quality detection and adaptive control in the automated packaging process of food-grade PET bottles.

This invention provides an inkjet printing ink kit, an inkjet printing method, and a packaging method for producing prints with excellent scratch resistance and water resistance after heat shrinkage in the printing of heat-shrinkable resin films. The inkjet printing ink kit, the inkjet printing method using the ink kit, and the packaging method using prints obtained by the inkjet printing method all comprise: an aqueous ink containing pigment, and a substantially pigment-free protective coating liquid. The aqueous ink contains a binder resin (Ib) having carboxyl groups, and the protective coating liquid contains a compound (II) having reactive groups capable of crosslinking with the carboxyl groups of the binder resin (Ib). The surface tension γ(B) of the protective coating liquid is greater than the surface tension γ(A) of the aqueous ink.

This invention provides a functional slurry and its preparation method, a coated separator, and a lithium-ion battery, belonging to the field of lithium-ion battery technology. The functional slurry prepared by this invention has a low film-forming temperature, stable colloidal particles, no agglomeration, stable coating adhesion, and good uniformity in peel strength. When coated on a separator substrate, it can impart heat-resistant safety performance or electrode adhesion characteristics to the separator: low thermal shrinkage rate at high temperatures, excellent electrode adhesion, high peel strength, and no coating powder shedding during processing. The functional coating prepared using this slurry is firmly bonded to the substrate surface, effectively improving the problem of large fluctuations in coating performance, especially peel strength, under different seasons, temperatures, and geographical conditions. This improves the consistency of coated separator products, improves the consistency of cell performance, increases the yield of separators and cells, and reduces the problem of high cell short-circuit rates caused by coating powder shedding.

This invention belongs to the technical field of flexible packaging materials, specifically a low-heat-shrinkage biaxially oriented polyethylene film, its preparation method, and its applications. The invention comprises a film body, which is composed of an upper corona layer, a sub-surface layer, an intermediate layer, a sub-inner layer, and a lower corona layer connected sequentially. The polyethylene film of this invention possesses excellent optical and mechanical properties, low high-temperature heat shrinkage, stable surface wetting tension, and uniform thickness, meeting the requirements of high-temperature, high-speed packaging bag forming.

The application discloses a PVC heat-shrinkable film preparation mixing device, and belongs to the technical field of film preparation. The PVC heat-shrinkable film preparation mixing device comprises a base, a mounting plate is fixedly installed above the base, a barrel is arranged above the mounting plate, a stirring assembly is arranged on the inner wall of the barrel, the stirring assembly comprises an open ring plate which is fixedly installed above the barrel, a plurality of side rods are fixedly and symmetrically and uniformly connected to the inner wall of the open ring plate, an upper shell plate is fixedly connected to the upper side of the side rods, and a threaded cylinder rod is movably installed on the inner wall of the upper shell plate. The reverse idling phenomenon of the ratchet ring drives the elastic spiral ring plate to rotate reversely on the inner wall of the barrel, the stirring material is turned over from bottom to top, the bottom is stirred by the stirring plate, and therefore the material can be mixed in the mode that the material is turned over from bottom to top and the bottom is stirred.

The glass substrate of the present invention is characterized by having a deformation point of 695 to 740°C, a temperature of 104.5 dPa·s of 1300°C or less, a liquid phase viscosity of 104.5 dPa·s or more, a Young's modulus of 78 GPa or more, and a thermal shrinkage rate of 20 ppm or less when heat treatment is performed at 500°C for 1 hour.

This utility model belongs to the technical field of equidistant slitting devices, specifically an equidistant slitting device for POF heat shrink film. Addressing the problem of inconvenience in increasing or decreasing the number of slitting blades according to slitting requirements and the inability to adapt to different slitting needs, the following solution is proposed: a first mounting plate; a fixing rod fixedly mounted on one side of the first mounting plate; multiple connecting plates movably mounted on the fixing rods, each connecting plate having a slitting blade mounted on it; a second mounting plate located at the end of the fixing rods away from the first mounting plate; a rectangular hole located on the second mounting plate, with a rectangular block fixedly mounted at the end of the fixing rod away from the first mounting plate, the outer side of the rectangular block contacting the inner wall of the rectangular hole; and a locking groove located at the bottom of the rectangular block. This utility model allows for the increase or decrease of the number of slitting blades as needed to meet different slitting requirements, with a simple structure and convenient use.

The utility model relates to heat shrinkage film label production equipment technical field discloses a cutting device for heat shrinkage film label machine, and both sides positions of cutting knife rest top are all fixedly connected with hydraulic telescopic link, and cutting knife rest top and located fixed connection hydraulic telescopic link middle part position are equipped with negative pressure fan, both sides positions of cutting knife rest surface are all fixedly connected with rectangular slide rail, and the surface position of rectangular slide rail is all movably connected with moving block, the utility model discloses be equipped with moving block, connecting rod, connecting block, telescopic pipe, extrusion spring, telescopic push rod, heterotypic polishing block, be favorable to when dulling, kerf burr, wire drawing etc.

The application discloses a kind of lithium battery diaphragm and its preparation method, and the lithium battery diaphragm includes base film and coating on base film, and the coating is obtained by coating lithium battery diaphragm slurry, and the lithium battery diaphragm slurry includes: nano-aluminum oxide and sodium alginate composite hydrogel.The application is prepared by coating lithium battery diaphragm slurry with nano-aluminum oxide as main material and adding sodium alginate composite hydrogel solution on the surface of base film to obtain diaphragm, improve the heat resistance and insulation of base film, solve the problem of serious heat shrinkage of prior art diaphragm, thereby improve the safety of lithium battery, and also can improve the liquid absorption and liquid retention of diaphragm.

The present invention relates to a first stretched polylactic acid film formed from a first film-forming material containing polylactic acid, and a multilayer polylactic acid film including a particle-containing layer, wherein the tensile modulus Ea in the longitudinal direction and the tensile modulus Eb in the width direction of the multilayer polylactic acid film satisfy the formula Ea + Eb > 8.0 GPa, the degree of crystallinity is 40% or more and 90% or less, and when the multilayer polylactic acid film is heated at 150°C for 30 minutes, both the thermal shrinkage rate in the longitudinal direction and the thermal shrinkage rate in the width direction are 10.0% or less. According to the present invention, it is possible to provide a multilayer polylactic acid film with excellent elastic modulus and heat resistance using polylactic acid derived from iomass raw materials and which is biodegradable.

The present invention relates to a stretched polyester film and a method for preparing the same. The stretched polyester film contains a polyester resin in which a diol component and a dicarboxylic acid component are polymerized, and the heat shrinkage rate at 80°C in the main shrinkage direction of the film is 40% or more, and when the film is analyzed by differential scanning calorimetry (DSC) during the first and second heat treatments, the first melting point (T m1 ) and the second melting point (T m2 ) appears. The stretched polyester film according to the present invention has excellent heat shrinkability and improves the efficiency of the recycling process for waste plastic containers.

This invention discloses a modified bamboo fiber cement-stabilized crushed stone and its preparation method, belonging to the technical field of road engineering construction materials. The material consists of fully graded crushed stone, 65-95 parts of 42.5 grade ordinary Portland cement, 3-7 parts of modified bamboo fiber, and 110-140 parts of water. The core innovation lies in using a composite modification process of "acid-base coupling etching + silane coupling agent coating" to treat the bamboo fiber, solving the problems of poor interfacial compatibility and easy agglomeration and degradation between natural bamboo fiber and cement-based materials. The material prepared by this invention exhibits a 28-day splitting strength 14.6%-41.5% higher than traditional cement-stabilized crushed stone, with a drying shrinkage coefficient controlled at 1.7×10⁻⁴ / ℃-2.1×10⁻⁴ / ℃ and a thermal shrinkage coefficient controlled at 2.8×10⁻⁵ / ℃-3.5×10⁻⁵ / ℃, realizing the resource utilization of bamboo waste. It is suitable for semi-rigid base and subbase layers of highways at all levels, especially suitable for heavy-load roads and highway construction in cold regions.

The utility model discloses a small line diameter petal spring hot press setting device relates to petal spring production and processing technical field, solved the problem that petal spring is easy to have thermal shrinkage deformation in annealing process. The hot press setting device includes: install lower die install lower die and include mounting panel and a plurality of vertical fixed limit rod on mounting panel, a plurality of limit rods can respectively along the outer contour and the inner contour distribution of petal spring, to form the limiting area for limiting a plurality of superimposed petal spring between a plurality of limit rods, press mechanism, press mechanism includes a plurality of can go up and down the press needle, a plurality of press needles all are located the just above of limiting area, and along the locus shape distribution of petal spring. The device can be compacted and positioned a plurality of superimposed petal spring on install lower die, make petal spring be in the stress annealing of laminated pressure and go, can completely eliminate the deformation in the heating process, guarantee product quality, realize batch production.

This utility model discloses a high-strength heat-shrinkable film blowing device, relating to the field of heat-shrinkable technology. It includes a blowing table with a conveying groove at its top. A transmission groove is formed on the bottom surface of the inner wall of the conveying groove. A conveyor belt is installed on the inner wall of the transmission groove, and multiple positioning plates are fixedly connected to the surface of the conveyor belt. A fixed frame is fixedly connected to the top of the blowing table, and a fan groove is formed at the top of the fixed frame. A hot air fan is installed inside the fan groove. Storage grooves are formed on both sides of the inner wall of the conveying groove, and each storage groove contains a guide air blowing assembly. The distance between the two guide plates can be adjusted to accommodate packaging boxes of different sizes. Simultaneously, hot air can be delivered to the inside of the guide plates through a connecting pipe, enabling heat shrinking of the sealing film on both sides of the packaging box. Combined with an air outlet plate, this allows for multi-directional heat shrinking of the sealing film on the outer surface of the packaging box, further improving the practicality of the guide plate.

The utility model discloses a kind of express waybill full-automatic heat shrink packaging machines involving heat shrink packaging technical field, including feeding assembly, film coating assembly, edge sealing assembly, cutting assembly, heat shrink machine and discharging assembly, feeding assembly includes rack main body, roller shaft is rotatably connected in rack main body both sides, film coating assembly includes mounting bracket, upper winding shaft and lower winding shaft are rotatably connected in mounting bracket upper and lower side respectively, transparent film is set on upper winding shaft and lower winding shaft, edge sealing assembly includes support seat, the upper end surface of the inner cavity of support seat is quadrilateral distribution and has slide bar, the both sides of push plate are connected with upper plastic sealing piece by connecting piece, lower plastic sealing piece is provided below upper plastic sealing piece, cutting assembly includes cutting plate, cutting knife and heating piece, discharging assembly includes material collecting frame and guide plate, the application can meet the needs of workpiece continuous packaging, degree of automation is high, and the use cost of packaging machine is further reduced by using the linkage of each component.

The application belongs to the technical field of preparation and application of lithium ion battery separators, and relates to a high-temperature-resistant porous lithium battery PI separator and a preparation method and application thereof. The method mainly comprises the steps of casting solution preparation, wet film preparation, composite film preparation, thermal imidization, template removal and drying forming. The method is simple in process and low in cost. In particular, no complex template dispersing equipment is needed, and the template laying operation is simple and easy to operate. The template removal only needs to be soaked and cleaned with deionized water, without the need for organic solvent assistance, thereby reducing the preparation cost and environmental load and being suitable for large-scale industrial production. The separator prepared by the method has a homogeneous membrane structure, no interface delamination risk, high mechanical strength, excellent heat shrinkage resistance and electrolyte wettability. When applied to a lithium ion battery, the growth and penetration of lithium dendrites can be effectively inhibited, and the cycle life and safety performance of the lithium ion battery can be significantly improved.

A heat-shrinkable polyester film having an improved recyclability and excellent attachment and appearance is provided. The heat-shrinkable polyester film, having a property (A) in which a clumping fraction of a polyester resin or the like is 1.2% or less, a property (B) in which a melting point is 190° C. to 230° C., a property (C) in which a melting heat quantity is 25 to 45 mJ / mg, and properties (D1) to (D4) in which a thermal shrinkage ratio in a main shrinkage direction measured under thermal shrinkage conditions at 60° C., 70° C., and 80° C. for 10 seconds is 0 to 5%, 25 to 50%, 55 to 85%, and a standard deviation of the value of the thermal shrinkage ratio measured at 95° C. to 100° C. for 10 seconds is 1.5% or less.

This invention discloses an enhanced cylindrical battery and its fabrication method. The battery comprises a cylindrical steel casing and a carbon fiber resin composite reinforcing layer fully enclosing its circumferential surface. The reinforcing layer consists of multiple single-layer carbon fibers with a surface density of 25 g / m³. 2 ~55g / m 2 The ultra-thin prepreg is cured at high temperature, with carbon fiber accounting for 55% to 70% of the volume. This invention utilizes the difference in thermal shrinkage during the high-temperature curing process to create inward radial pre-compression stress at the interface, forming an active constraint mechanism to counteract the expansion force generated during cell charging and discharging. This technical solution significantly improves the burst pressure limit and impact resistance of the casing without significantly increasing battery weight, keeping the weight gain within 10% of the casing weight. It effectively solves the problem of reduced specific energy caused by traditional thickened steel casing solutions, achieving a synergy between lightweight battery and high safety.