289 results about "Low modulus" patented technology

The invention discloses a biodegradable paper-plastic composite material and a preparation method thereof. The biodegradable paper-plastic composite material is prepared from the following components in parts by mass: 70-90 parts of poly (butylene adipate-co-terephthalate), 10-30 parts of carbon dioxide-based polyester-polycarbonate and 0.2-0.5 part of a processing aid. Polybutylene adipate terephthalate (PBAT) not only has better mechanical properties, but also has higher ductility and elongation at break, but has the defects of low modulus, easiness in curl deformation, higher melt viscosity, easiness in adhesion to equipment and poor barrier property. PPCP belongs to an amorphous polymer, is high in tensile strength and excellent in barrier property, but is low in elongation at break (-5%), is a brittle polymer and is poor in melt strength, and the higher the temperature is, the poorer the melt strength is. Therefore, the PPCP is ingeniously used for modifying the PBAT blown film, the obtained film combines the properties of the two plastics, the good ductility and elongation at break are kept, the modulus of the film is also improved, and meanwhile, the melt strength is also easy to process.

The invention provides a rapid self-driven anti-icing material and a preparation method thereof. The rapid self-driven anti-icing material comprises a modulus span formed by at least two materials, a Z-axis perpendicular to a substrate direction, and an upper'hard (high-modulus material) 'structure and a lower'soft (low-modulus material)' structure distributed along the Z-axis direction, the surface of the large-area rapid self-driven anti-icing material is provided with a microstructure (micron-scale or nano-scale, continuous or discontinuous, isotropic or anisotropic wrinkles, micro-columns, grooves, inverted triangular bulges and the like). And the surface has an isotropic continuous wrinkle structure (figures), and has modulus span (hard at the upper part and soft at the lower part) in the Z-axis direction. The material can realize zero-energy-consumption deicing (only under the action of self gravity of ice deposits or wind power) without depending on a lubricating layer.

A three-dimensional (3D) printing system is configured to print a 3D article in a layer-by-layer manner and includes a vertical beam, an elevator, and a build platform. The elevator is configured for vertical translation along the vertical beam and includes an upper support and a lower support. The lower support includes at least one elevator actuator extending upward from an upper side. The upper support has a lower side including a datum surface in engagement with the actuator. The elevator actuator is configured to modulate a position of the upper side of the upper support. The build platform includes a build plate coupled below a support plate. The build plate has a lower side for formation of the 3D article. The support plate has a lower side that engages the upper side of the upper support of the elevator to support the build platform.

The application discloses a kind of bundled biaxial skin-core structure tensile yarn spinning processes, specifically including the following steps, step S1: one low modulus high elongation fiber filament one and one low modulus high elongation fiber filament two are unwound by active feeding roller, and are respectively fed into lower layer hollow spindle center tube one and lower layer hollow spindle center tube two, as two core filaments;Step S2: high modulus low elongation fiber filament one is wrapped on the surface of the core filament in positive helical line configuration at lower layer guide hook one;High modulus low elongation fiber filament two is wrapped on the surface of the core filament in reverse helical line configuration at lower layer guide hook two;Form biaxial skin-core structure covering yarn system, and pass through upper layer hollow spindle center tube;Step S3: at upper layer guide hook, the fiber filament yarn with excellent elastic elongation wound on upper layer hollow spindle is bound to the surface of the biaxial skin-core structure covering yarn system with low spiral covering density, to form bundled biaxial skin-core structure tensile yarn.

In a foldable display device according to an embodiment, a groove with a zigzag pattern is formed on a surface of an optical element. The optical element is bonded using an adhesive layer having a low modulus to mitigate stress and impact due to folding in a folding area of the device.According to an embodiment, a foldable display device includes: a panel assembly divided into a folding area and a non-folding area; and an optical element on the panel assembly including grooves with a zigzag pattern patterned on an upper surface of the optical element.

A golf club head with a sole having a low stiffness compliance zone, which allows the face to deflect downward upon impact with a golf ball, is disclosed herein. The compliance zone comprises a plurality of through openings that are filled with one or more filler pieces comprising a low modulus material, all of which are located within three inches of a face section measured along a front-to-back axis of the golf club head.

The invention relates to the technical field of additives for oil well cement, in particular to a flexibilizer for oil well cement and a preparation method and application thereof.The flexibilizer adopts a low-modulus and high-elasticity rubbery polymer as an inner core and adopts a high-modulus rigid polymer capable of being chemically bonded with an oil well cement matrix as a shell; the prepared polymer-based toughening agent with the core-shell structure can enhance the toughness of oil well cement.

The invention discloses an adhesive testing system, method and device, and relates to the technical field of adhesion testing, and the method comprises the following steps: obtaining a substrate surface image after an adhesive is stripped; a flexible isolation plate is arranged between the adhesive and the base material, and the flexible isolation plate is a hollowed-out isolation plate so that the adhesive and the base material can be bonded in a point-shaped mode. Performing color analysis on the surface image of the base material to determine a damage mode corresponding to each bonding point; the destruction mode comprises an adhesive body destruction mode, a base material body destruction mode and a bonding interface separation mode. And determining a test result of the adhesive based on the proportion of the bonding interface separation mode in the damage mode corresponding to all the bonding points. By arranging the hollowed-out isolation plate between the adhesive and the base material, even if the base material is an elastic base material with low modulus, stripping of the adhesive and the base material can be smoothly achieved. Based on the visual identification part, automatic evaluation of the adhesion effect of the adhesive can be realized, so that the adhesion effect of the adhesive can be evaluated more accurately.

The present application provides a support member, a display screen assembly, and an electronic device. The support member is arranged on a backlight side of a flexible display screen. The support member is composed of a fiber material and a polymer material attached to the fiber material. For different regions of the support member, fiber materials having different moduli may be selected. In some embodiments of the present application, the support member may be divided into a bending portion and a support portion. The modulus of the bending portion is different from the modulus of the support portion. The bending portion may employ a fiber material having a lower modulus, and the support portion may employ a fiber material having a higher modulus. In some other embodiments of the present application, at a position of the support portion corresponding to adhesive dispensing or an elastic sheet, a fiber material having a higher modulus may be selected.

The invention provides a low-modulus and high-adhesion UV adhesive and a preparation method and application thereof.The low-modulus and high-adhesion UV adhesive is prepared from polycarbonate type polyurethane acrylate resin, N, N-dimethylacrylamide, hydroxyethyl acrylate, tripropylene glycol diacrylate, ethyoxyl ethyoxyl ethyl acrylate, vinyl chloride and vinyl acetate copolymer resin, bis (2, 4, 6-trimethyl-1, 3-pentanediol) (2, 4, 6-trimethyl-1, 3, 6-trimethyl-1, 3, 6-trimethyl-1, 3, 6-trimethyl-1, 3, 6-trimethyl-1, 3, 6-trimethyl-1, 3, 6-trimethyl-1, 3-pentanediol The coating is prepared from the following raw materials: 4-(2, 6-trimethylbenzoyl) phenyl phosphine oxide, 2-hydroxy-2-methyl-1-phenyl-1-[4-(2-hydroxyethoxy) phenyl] acetone, TPO (Thermoplastic Polyolefin), vinyl triethoxy silane, vinyl trimethoxy silane, a diluent and a de-foaming agent. The adhesive provided by the invention can be used for welding spot protection, prism fixation, glass and plastic bonding, structural member bonding and the like. Due to the low modulus, stress can be released during welding spot protection and structural part bonding, and the phenomena of cracking, layering and the like caused by stress residues are avoided, and functional failure of a product is avoided; and due to high adhesion, the product can be better protected, and the product has the characteristics of high vibration resistance, impact resistance, high and low temperature resistance and the like.

The invention provides a hierarchical-modulus flexible three-dimensional force sensing array and a preparation method thereof, and belongs to the technical field of three-dimensional force sensors. The flexible three-dimensional force sensing array comprises a flexible pressure sensing layer which comprises a substrate layer and a pressure sensing array arranged on the substrate layer; the graded modulus force decomposition layer is arranged on the flexible pressure sensing layer and comprises a high modulus force decomposition layer and a low modulus force decomposition layer, the high modulus force decomposition layer comprises high modulus force decomposition units corresponding to the sensing units in the pressure sensing array, and gaps among the high modulus force decomposition units are filled with the low modulus force decomposition layer; and when the space force acts on the low-modulus force decomposition layer, the low-modulus force decomposition layer generates tangential slippage deformation under the action of the space force, so that the space force is transmitted to the pressure sensing array through the high-modulus force decomposition layer, and the pressure sensing array realizes sensing of the space force. According to the invention, the problem of measurement blind areas caused by gaps of force decomposition units of the three-dimensional force array can be solved.

The preparation method comprises the following steps: preparing a flexible amino-terminated polyurea curing agent, preparing a low-modulus high-toughness epoxy primer and a high-modulus weather-resistant fluorocarbon finish, and preparing the self-deicing anticorrosive coating with a gradient modulus structure. According to the polar region self-deicing anti-corrosion coating prepared through the method, icing is delayed through the hydrophobic surface of the fluorocarbon finish paint; an ice-coating interface is wrinkled under an external force by utilizing the modulus mismatching of the finish paint and the primer, so that the interface controllable fracture self-deicing is realized; the compactness and hydrophobicity of the primer coating are enhanced by using the flaky interface reinforcing filler, and the flaky interface reinforcing filler cooperates with the finish paint to resist permeation of a corrosive medium, so that long-acting corrosion prevention is realized; in addition, a flexible chain segment and a polyurea toughening phase are introduced into the primer and are chemically bonded with the finish paint, so that the low-temperature toughness and the impact resistance are synergistically enhanced; the problem that the low-temperature mechanical property, the long-acting corrosion resistance and the lasting anti-icing property of a polar region coating material are difficult to consider at the same time is solved, and the deicing and anti-corrosion requirements of an upper-layer aluminum alloy building of a polar region ship can be met.

This application provides an adhesive film and a preparation method thereof, a composite assembly, and an electronic device. The adhesive film is prepared through a cross-linking reaction of a prepolymer. The prepolymer includes an alkyl acrylate soft monomer and an acrylate polar monomer. A mass fraction of the alkyl acrylate soft monomer in the prepolymer is greater than or equal to 60 wt %. A mass fraction of the acrylate polar monomer in the prepolymer is less than 30 wt %. The adhesive film provided in this application has an excellent low modulus at a low temperature and a high creep recovery rate, and can be used to improve a service life of a foldable electronic device in repeated folding processes.

The invention discloses a preparation method and application of a wide-range flexible capacitive pressure sensor, and the method comprises the steps: obtaining the parameter information of a high-modulus dielectric material based on a test result of a single-layer flexible pressure sensor; simulation analysis is carried out based on the high-modulus medium parameter information, and the optimal modulus gradient range between the media is determined; according to the obtained optimal modulus gradient range data, low-modulus dielectric material parameters are determined; respectively selecting low-modulus polymer powder and high-modulus polymer powder according to the parameters of the low-modulus dielectric material and the parameters of the high-modulus dielectric material to prepare a low-modulus dielectric film and a high-modulus dielectric film; and assembling the low-modulus dielectric film, the high-modulus dielectric film and the flexible electrode according to a sandwich structure, and leading out a lead to obtain the double-layer flexible pressure sensor. According to the invention, smooth conversion of force between two kinds of modulus media is ensured, and the phenomenon of force conduction failure caused by modulus mismatch between the media is avoided.

The present invention discloses a wave-absorbing layer plate with low curing deformation and a preparation method thereof, belonging to the technical field of structure / stealth composite materials, wherein a low modulus wave-absorbing adhesive film is prepared by compounding a resin matrix, a wave-absorbing agent, an auxiliary agent and low modulus small particles; a low modulus glass fiber prepreg is prepared by compounding glass fiber, a resin matrix and low modulus small particles; a carbon fiber prepreg, a low modulus wave-absorbing adhesive film and a low modulus glass fiber prepreg are sequentially laid on the surface of a molding tool, and co-curing molding is performed to obtain a wave-absorbing layer plate with low curing deformation. Due to the introduction of low modulus small particles and the use of co-curing molding, the present invention can significantly reduce the deformation of the wave-absorbing layer plate during molding.

The present invention provides a high dielectric constant, low modulus, room temperature self-healing dielectric elastomer, comprising the following components: a hydroxyl-terminated polysiloxane, an organic compound containing a disulfide bond, and a silane coupling agent; the hydroxyl-terminated polysiloxane has the following structural formula I: wherein R1 and R2 are independently selected from C 1‑12 Alkyl, C 6‑24 Aryl, C 6‑24 Aryl-substituted C 1‑12 Alkyl, at least one C 1‑12 Alkyl substituted C 6‑24 Aryl; R3 and R4 are independently selected from C 1‑12 Alkyl; each R5 is the same or different and is independently selected from C 0‑12 Alkylene; n is any integer between 4 and 100. The present invention discloses a high-dielectric-constant, low-modulus, room-temperature self-healing dielectric elastomer and a method for preparing the same. The resulting dielectric elastomer has a high dielectric constant, room-temperature self-healing properties, and a low modulus. The preparation method is simple, requires no catalyst or solvent, and is easily controllable, low-cost, and readily industrially scalable. The elastomer is suitable for use in various fields, including artificial muscles, sensors, supercapacitors, polymer generators, and tactile feedback devices.

The invention provides a photocuring high-temperature-resistant optical fiber coating and a preparation method thereof, and the photocuring high-temperature-resistant optical fiber coating comprises the following components by weight: 40-80% of high-modulus acrylate modified methyl phenyl silicone oil; 10-50% of low-modulus acrylic ester modified methyl phenyl silicone oil; 5-30% of an acrylate monomer; 0.5 to 6% of a photoinitiator; and 0.05-1% of an antioxidant. According to the invention, high-modulus and low-modulus acrylic ester modified methyl phenyl silicone oil is compounded, high-modulus and low-molecular-weight acrylic ester modified methyl phenyl silicone oil is taken as a main body, the mechanical property is adjusted by the low-modulus and high-molecular-weight acrylic ester modified methyl phenyl silicone oil, and then the viscosity is adjusted by the active acrylic ester monomer; the optical fiber has the advantages of simple synthesis process, excellent heat resistance and low temperature resistance, adjustable refractive index and mechanical property, easy stripping of an optical fiber coating and the like.

The invention belongs to the technical field of high polymer materials, relates to the technical field of adhesives, and particularly relates to a high-adhesion, low-modulus and high-damping polymer reversible interlocking network adhesive film as well as a preparation method and application thereof. The polymer reversible interlocking network adhesive film provided by the invention comprises a strong bonding single network A containing a dynamic covalent bond and a low modulus single network B containing a dynamic covalent bond. Wherein a polar group in the strong adhesion single network A endows an adhesion interface with adhesiveness, a low-modulus monomer introduced into the low-modulus single network B enables the adhesive to present lower modulus, and an interlocking network structure endows the adhesive with higher cohesiveness and interface adhesion performance. Meanwhile, the adhesive is endowed with the high damping characteristic through slippage and other motions among molecular chains of the interlocking network, and the adhesive film can be endowed with self-repairing performance and recoverability through dynamic bonds in the polymer reversible interlocking network adhesive film. Therefore, the reversible interlocking network adhesive film provided by the invention synergistically realizes three key performances of strong adhesion, low modulus and high damping.

The invention discloses a design and preparation method of an insect-imitating foot pad variable-stiffness surface with a strong friction characteristic. The insect-imitating foot pad variable-stiffness surface structurally comprises a curved surface film, orientation micro-columns and a substrate layer, the three components are all composed of temperature-sensitive shape memory epoxy resin, and the modulus depends on the glass transition temperature of the temperature-sensitive shape memory epoxy resin. In the normal contact stage, the temperature field is set to be higher than the glass-transition temperature, the material is in a low-modulus rubber state, and the contact rigidity is low and the contact area is large due to the structural characteristics of the orientation micro-column and the curved film; before tangential loading, the material is switched to a high-modulus glassy state, the locking effect maintains interface conformal contact, the shearing effect can be effectively resisted, and the static friction force is enhanced; the structural combination of the oriented micro-columns and the curved film can adapt to the surface with large-range roughness, and the maximum static friction force of the bionic surface on smooth and rough surfaces is improved. According to the invention, the limitation of single adaptability of a traditional flexible bionic adhesion surface is broken through, and the requirement of a strong friction application scene on a surface with large-range roughness can be met.

The invention relates to the technical field of alloy materials, in particular to a design and preparation method of a high-strength low-modulus Ti-Mo-Nb-Zr-Sn biomedical titanium alloy. Beta-type medical titanium alloy with low elastic modulus is designed by adopting a method of combining a physical metallurgical model and machine learning, a titanium alloy plate is prepared through cold working deformation, and finally, the cold-rolled plate is further strengthened by adopting short-time low-temperature deformation aging treatment. The Ti-Mo-Nb-Zr-Sn alloy obtained through the method has the excellent performance of high strength and low modulus, the tensile strength Rm is not lower than 775 MPa, the elastic modulus E is not higher than 45 GPa, the highest strength-modulus ratio is 22.2 * 10 <-3 >, from the aspect of the strength-modulus ratio, on the basis of the low elastic modulus, the mechanical compatibility of the alloy is remarkably improved through deformation aging treatment, the performance requirement is met, and meanwhile the mechanical property of the alloy is improved. The stress shielding phenomenon can be effectively improved, and the material can be used as a potential medical fixing material in clinical application.

A low-modulus, high-resilience modified alcohol-based silicone sealant, its preparation method, and its application are disclosed, relating to the field of sealant materials technology. The silicone sealant comprises the following components in parts by weight: 100 parts of α,ω-alkoxysilane ethylidene-terminated polydimethylsiloxane, 30-80 parts of plasticizer, 80-150 parts of reinforcing filler, 0.5-20 parts of silane crosslinking agent, 0.5-10 parts of silane tackifier, and 0.01-1 part of Lewis acid catalyst; wherein the plasticizer is α-alkoxysilane ethylidene-terminated polydimethylsiloxane. The low-modulus, high-resilience silicone sealant of this invention exhibits fast surface drying speed, low modulus, high elastic recovery rate, good adhesion, and weather resistance.

The invention belongs to the technical field of sealants, and discloses a low-modulus high-elongation antifouling weather-resistant sealant, a preparation method and application thereof, the low-modulus high-elongation antifouling weather-resistant sealant comprises the following raw materials by weight: 100 parts of alpha, omega-dihydroxy polysiloxane, 80-200 parts of an inorganic filler, 10-30 parts of a cross-linking agent, 1-4 parts of a coupling agent, and 2-10 parts of a titanate vulcanizing agent; wherein the inorganic filler comprises active calcium carbonate and modified talcum powder; the modified talcum powder is prepared by sequentially carrying out layered stripping and modification treatment on talcum powder. The low-modulus and high-elongation antifouling sealant provided by the invention can be well suitable for joint sealing during repair of ancient buildings, and meanwhile, the product can also be extended to the field of sealing of other low-modulus antifouling buildings with the same requirements, and has high economic value.

A package module includes a conductive coil; and a composite magnetic material covering the conductive coil, the composite magnetic material including: a magnetic filler including coated magnetic particles (MB) dispersed in the composite non-magnetic material (MA); and a falling film amount filler (MC) comprising falling film amount particles or rubber particles, or comprising a filler having-OH or-COOH functional groups.

The PET cord for manufacturing a cap ply and the cap ply manufactured using same according to the present invention have low heat shrinkage characteristics and a moderately low modulus even at high temperatures compared to PET having general heat shrinkage characteristics and high-temperature modulus, and exhibits a low modulus in a low elongation range, thereby solving disadvantages in the manufacturing process and providing higher reinforcement than nylon. In addition, the tire according to the present invention in which the bonding relationship between the tread and steel belt layer adjacent to the cap ply is adjusted can overcome the physical limitations that may occur when PET is used as a cord material of the cap ply.

Existing giant engineering tire sidewall filling rubber is low in heat generation and modulus and prone to middle-stage damage in the using process, and tire beads of tires are swelled. In order to solve the problems, the invention provides the sidewall filling rubber with high modulus at definite elongation and low heat generation and the preparation method thereof, by using the novel non-standard carbon black, the carbon black dispersing agent and the sulfur carrier and sulfur combined vulcanization system, the 300% modulus at definite elongation of the sidewall filling rubber is obviously improved, and the heat generation is further reduced; meanwhile, the excellent fatigue aging resistance, the excellent vulcanization reversion resistance and the good heat aging resistance are kept, the problem that the tire bead position is large in deformation and high in heat generation due to the fact that the modulus of the tire side filling rubber is low is solved, the service life of the giant engineering tire is prolonged, and particularly the durability life of the tire bead of the all-steel giant radial engineering tire is prolonged.

A method of manufacturing a three-dimensional (3D) article includes operating a print engine to fabricate a composite structure including the 3D article coupled to a support structure, removing the composite structure from the fluid tank, and peeling the inside surface of the sheath away from the outer surface of the article, peeling progressively breaks the plurality of strands. The support structure includes a conformal sheath having an inside surface that follows the outer surface of the 3D article with a gap between the inside surface of the sheath and the outer surface of the article, and a plurality of strands that span the gap and individually have opposed ends that are coupled to the inside surface of the sheath and the outer surface of the article to maintain the gap, the gap filled with the photocurable liquid ink.

A jacketed cable includes a first twisted pair formed by a first insulated conductor twisted with a second insulated conductor with a first dielectric tape residing therebetween. The first dielectric tape may foamed and / or include a plurality of through holes with sizes and spacings to tune impedance and / or balance a delay skew amongst multiple twisted pairs and / or reduce crushing of the first and second insulation layers of the first and second conductors. A method of manufacturing may optionally include heating or chilling the first dielectric tape and / or chilling the first and second insulated conductors prior to forming the first twisted pair to a temperature different from the ambient temperature, thereby tuning the impedance of the first twisted pair and / or adjust the delay skew of the first twisted pair relative to other twisted pairs and / or reduce crushing of the first and second insulation layers of the first and second conductors.

The invention belongs to the technical field of vulcanized rubber materials, and particularly relates to a low-modulus rubber material and a preparation method thereof. The low-modulus rubber material provided by the invention is prepared from the following raw materials in parts by weight: 70 to 100 parts of chloroprene rubber, 0 to 30 parts of nitrile rubber, 0.5 to 2 parts of stearic acid, 1 to 3 parts of anti-aging agent, 5 to 20 parts of carbon black, 2 to 10 parts of special reinforcing filler, 2 to 10 parts of plasticizer, 10 to 20 parts of vulcanizing agent and 0.5 to 2 parts of accelerant, the special reinforcing filler is a surface modified nano filler. The use amount of each component is limited, and the components are matched with one another to obtain the low-modulus and high-damping rubber material.

The present invention provides a hybrid cord and a manufacturing method thereof, wherein non-uniformity caused by the difference in fineness between two different yarns is solved by twisting a first low-modulus yarn to reduce the difference in twist index between the first low-modulus yarn and a second high-modulus yarn and thereby achieve functional uniformity, and thus the hybrid cord is more balanced functionally, and has high strength, strong adhesion to rubber, and excellent fatigue resistance properties, thus making it possible to achieve performance improvement and weight reduction in a tire.

A tactile sensor utilizes a magnet embedded in an elastomer and a magnetometer for measuring a strength of a magnetic field emitted by the magnet. The elastomer may include two layers, with a first layer having a lower modulus than the second layer. When two layers are used, the magnet can be positioned at an interface between the layers. The use of a softer outer layer increases the sensitivity of the sensor. Sensitivity can be further increased by including features or a pattern of features on the surface of the elastomer. The features, which can be similar to fingerprints on a human hand, are adapted to provide vibrational information caused by the surface roughness of a material. The sensor provides material characterization and can be used to identify the material in contact with the sensor. The sensor can be fabricated using molding techniques.