199 results about "Low modulus" patented technology

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.

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 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.

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 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.

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.

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.

The invention belongs to the technical field of pressure-sensitive adhesives, and particularly relates to a pressure-sensitive adhesive and a pressure-sensitive adhesive tape. According to the pressure-sensitive adhesive disclosed by the invention, the requirements of high adhesive force, high cohesion and low modulus of a double-sided adhesive tape layer are comprehensively considered, the polymerization ratio of butyl acrylate to 2-ethylhexyl acrylate to acrylic acid to hydroxyl-containing acrylate is ingeniously regulated and controlled, the weight-average molecular weight Mw is controlled to be 600000-900000 g / mol, polyacrylate resin is prepared, then proper tackifying resin is screened and matched, and the pressure-sensitive adhesive is prepared. The pressure-sensitive adhesive with excellent comprehensive performance can be obtained, and the required anti-falling performance can be met; the polyacrylate resin is obtained through solution method thermal polymerization, the synthesis process is simple and stable, and the technological process is more stable and reliable; the pressure-sensitive adhesive has lower energy storage modulus at normal temperature, is relatively soft, and has higher stress dispersion capacity when subjected to stress impact; the pressure-sensitive adhesive tape has excellent initial adhesion and adhesive force, the storage modulus in a high-temperature region is not rapidly attenuated, and the pressure-sensitive adhesive tape still has excellent mirror steel plate retention at 85 DEG C.

The invention relates to the technical field of structural adhesives, in particular to an epoxy composition capable of being used for bonding a camera module support and a preparation method of the epoxy composition, and the epoxy composition comprises the following components in parts by weight: 7-10 parts of epoxy resin; 20-25 parts of flexible epoxy resin; 5-10 parts of a core-shell epoxy resin toughening agent; 20-25 parts of a compound filler; 30 to 31 parts of organic hydrazide; and 8-9 parts of a modified amine adduct. The flexible epoxy resin has at least one structural characteristic of a long-chain polyether structure and an indene structure. The compound filler comprises calcium carbonate and silicon dioxide. The epoxy composition capable of being used for bonding the camera module support has the advantages of low precipitation, low curing shrinkage, high bonding strength, low modulus and excellent falling resistance, the reliability of the camera module support structure can be remarkably improved, and the epoxy composition is suitable for application environments of various miniature high-performance camera modules.

The application provides a high-modulus hybrid fiber reinforced resin bar and a preparation method and application thereof, relates to the technical field of building materials, and comprises a hybrid fiber reinforced bar as a core, a resin layer wrapping the core, and a fiber reinforced polymer bar winding the resin layer; wherein the volume ratio of carbon fibers and glass fibers in the hybrid fiber reinforced bar as the core is 1:2-1:6, the elastic modulus of the glass fibers is 90-120 GPa, the elastic modulus of the carbon fibers is 230-460 GPa, and the fiber volume fraction of the hybrid fiber reinforced bar as the core is 60-75%. The application solves the technical problems of low modulus and poor mechanical properties of the HFRP bar in the prior art, and achieves the technical effects of high elastic modulus, good toughness and strong compression resistance of the HFRP bar.

The invention discloses an ultralow-modulus high-elongation flame-retardant anti-corrosion sealant for suspension bridge profile steel isolation, and relates to the technical field of polymer sealing materials, the sealant specifically comprises a component A and a component B. The component A comprises an MS polymer, a plasticizer, aluminum hydroxide, magnesium hydroxide, calcium carbonate and a rheological additive; and the component B comprises the following components: a plasticizer, carbon black, aluminum hydroxide, magnesium hydroxide, an adhesion promoter and a catalyst. The ultralow-modulus high-elongation flame-retardant anti-corrosion sealant for suspension bridge profile steel isolation is of a two-component reaction curing type, the performance is easy to control and adjust, the sealant can be fully attached to the surface of an anchoring system after being cured, the sealing effect is improved, the combustion performance of a rubber body formed after vulcanization can reach the V-0 level, meanwhile, the sealant has excellent adhesive force to paint after vulcanization, and the service life of the sealant is prolonged. The adaptability of the sealant is improved; meanwhile, the ultra-low modulus and flame-retardant performance are considered, the ductility is high, the cracking possibility is reduced in the using process, the service life is prolonged, and the using effect is improved.

The invention relates to an acrylic optical adhesive sheet and a preparation method and application thereof. The creep value of the acrylic optical adhesive sheet at 25 DEG C and 10 kPa is 200% or above, and the recovery value at 25 DEG C is higher than 85%. The creep value at 65 DEG C and 10kPa is below 400%, and the recovery value at 65 DEG C is higher than 90%; the creep value at 120 DEG C and 10 kPa is 500% or less, and the recovery value at 120 DEG C is higher than 80%. The acrylic optical adhesive sheet has good creep recovery performance in normal and high temperature environments, the creep recovery rate of the acrylic optical adhesive sheet can be higher than 80% even under the conventionally required temperature condition (120 DEG C), the requirements for low modulus and good adhesive force of the optical adhesive sheet for folding equipment are met, and the optical adhesive sheet has the advantages of being simple in preparation process, low in cost and the like. And the possibility is provided for the use of the foldable equipment in a high-temperature environment.

The invention discloses a reworkable low-modulus OCA (Optical Clear Adhesive) glue, an adhesive as well as a preparation method and application thereof. The OCA glue is prepared from the following raw material components in parts by weight: 5 to 14 parts of butyl acrylate, 15 to 25 parts of 2-ethylhexyl acrylate, 2.5 to 5.5 parts of hydroxybutyl acrylate, 5 to 10 parts of lauryl acrylate, 0.0003 to 0.0008 part of an initiator and 40 to 70 parts of a solvent. The OCA adhesive prepared by the invention has lower storage modulus, glass transition temperature and higher deformation quantity in a low-temperature environment, can effectively dissipate stress generated in a bending process, and prevents a folding module from generating a layering phenomenon in the bending process. The OCA adhesive prepared by the invention has good reworking performance, can be easily peeled off from a folding screen under ultraviolet irradiation, is convenient to replace a protective film, and prolongs the service life.

A method for preparing a wide-temperature-range constant-elasticity low-modulus titanium alloy based on additive manufacturing technology, relates to the field of electron beam additive manufacturing technology, and the method comprises the following steps: step 1, preparing an electron beam powder with a particle size of 30-150 microns; step 2, establishing a three-dimensional model of a printed metal part; step 3, adjusting the printing process parameters and scanning strategy, using an electron beam device for additive manufacturing, and directly obtaining a high-precision wide-temperature-range constant-elasticity titanium alloy. The wide-temperature-range constant-elasticity characteristics of the alloy prepared by the method can be directly generated by controlling the additive manufacturing process parameters, without subsequent processing, and the room-temperature elastic modulus is 35-55 GPa, and the elastic modulus remains unchanged in the temperature range of-50 DEG C to 200 DEG C. The method has the advantages of simple process steps, low production cost and short processing cycle, and has good application prospect in the fields of national defense, aerospace, precision machinery and the like.

The application discloses a kind of low modulus high ductility super-retarding concrete, the concrete includes by weight ratio: cement 254~360 parts, fly ash 68~108 parts, slag powder 68~70 parts, 5~16mm gravel 352~393 parts, 16~25mm gravel 660~729 parts, medium sand 669~705 parts, rubber powder 20 parts, polystyrene plastic 15 parts, water 150 parts, water reducing agent 5.9~7.5 parts, super-retarding agent 3.1~4.0 parts, water-based polyurethane 15 parts, nano composite hydrogel 15 parts, polyolefin elastomer 5 parts, polypropylene fiber 1.0 part, can have higher toughness, lower elastic modulus, and can reach design requirement strength and durability, simultaneously, when practical application, first, a layer of low modulus high ductility super-retarding concrete is poured, then continue to pour ordinary concrete, combined with other anti-cracking measures, can effectively reduce the constraint degree of bottom plate to upper portion, prevent temperature cracks.

A two-component polyurethane adhesive for bonding modules in automotive and internet-of-things (IoT) applications is provided. The adhesive comprises a polyisocyanate monomer and an isocyanate-terminated polyurethane prepolymer, along with polyols, diols, polyamines, and a polybutadiene chain compound. It features a high bonding strength of over 3MPa with low modulus in service temperature from -40℃ to 105℃ and is suitable for dissimilar material assembly.

Provided are a waterborne polyurethane emulsion for ultra-thin polyurethane condoms having a low modulus and a high strength, and a method for preparing the emulsion, wherein the waterborne polyurethane emulsion comprises 15 to 18 parts by mass of a macromolecular diol, 4 to 6 parts by mass of a diisocyanate, 0.6 to 0.9 parts by mass of a hydrophilic chain extender, 0.4 to 0.8 parts by mass of a small-molecule chain extender, and the like. The prepared waterborne polyurethane emulsion is characterized by a low modulus, a high strength, and high resilience.

The invention relates to a PA12 / PA6 parallel composite elastic fiber and a preparation method thereof. Nylon 12 is adopted as a high-shrinkage component, PA6 is adopted as a low-shrinkage component, parallel compounding is achieved, industrial production with high spinning speed and no yarn breakage can be achieved, and real production significance is achieved. Meanwhile, the PA12 / PA6 parallel composite elastic fiber is excellent in elastic property, low in modulus, soft and skin-friendly, has excellent dyeing property in an acid dye system, and provides a new solution for elastic high-end fabric.