101 results about "Rigid core" patented technology

The invention discloses a method for manufacturing a rigid-flex printed circuit board with a surface flexible layer, which comprises the following steps of: taking a double-sided flexible copper-clad plate, manufacturing a through hole and electroplating, and then manufacturing a circuit pattern to form a pattern plate; manufacturing a first windowing covering film for windowing corresponding to the golden finger area and covering the through hole and a second windowing covering film for windowing corresponding to the through hole and the ineffective area, respectively attaching the first windowing covering film and the second windowing covering film to the two surfaces of the pattern board, and then carrying out electrometallization to form a flexible core board; taking a rigid copper-clad plate, windowing the rigid copper-clad plate corresponding to the flexible layered area, and then manufacturing a circuit pattern to form a rigid core plate; stacking and laminating the structures to form a laminated plate; drilling and electroplating are carried out on the laminated plate, then laser ablation is carried out on a through hole area, and the rigid-flexible combined plate is formed through post-process processing; by forming a new processing flow, the defects of low adaptability, processing precision and reliability of a traditional rigid-flex printed circuit board manufacturing method are systematically solved, and high-precision processing of the rigid-flex printed circuit board with high integration level is formed.

The invention discloses a method for manufacturing a surface flexible layer rigid-flexible combined board for an intelligent video module, which comprises the following steps of: taking a double-sided flexible copper-clad plate, and windowing a first surface copper layer corresponding to a first via hole to form a flexible core board; taking the first cover film and windowing corresponding to the first via hole to form a windowing cover film; correspondingly attaching the windowing covering film to one side of the second copper layer of the flexible core plate to form a covering film core plate; taking a prepreg, manufacturing a glue-blocking film corresponding to a flexible area of the prepreg, forming a glue-blocking prepreg, and manufacturing a rigid core plate; sequentially stacking and laminating the plates from top to bottom, enabling the glue blocking film to face the covering film core plate, then manufacturing a through hole in the rigid region, performing laser ablation on an insulating medium layer corresponding to a copper layer windowing pattern, electroplating, performing uncovering processing, removing a second copper layer at the bottom of a blind hole, forming a first via hole, and performing molding to form the rigid-flexible combined plate. The metallization process of the flexible area and the metallization process of the rigid area are combined into one-time electroplating, so that the consistency of the thickness of a copper plating layer is ensured.

The invention discloses a method for manufacturing a rigid-flex printed circuit board with a crossed surface flexible layer, which comprises the following steps of: taking a double-sided flexible copper-clad plate, manufacturing a copper layer and an insulating medium layer on one surface of the double-sided flexible copper-clad plate to form a groove body, forming an etching and ablation groove, distributing the groove body corresponding to the edge of a flexible board area, attaching a cover film in the range of the groove body, and forming an upper flexible board and a lower flexible board, manufacturing a rigid core plate layer and prepregs, stacking and laminating to form a laminated plate, manufacturing an outer layer circuit pattern, and then forming to form the rigid-flexible combined plate; optionally, a windowing rigid core plate and a windowing prepreg are manufactured, one layer of flexible plate is stacked and pre-pressed to form a groove body structure, a release pad is arranged in the groove body, and the other layer of flexible plate is stacked and pressed to form a pressed plate; the etching and ablating groove is formed in the flexible plate, it is guaranteed that the problem that the flexible plate is difficult to mill during forming is solved, the mode that the release pad is arranged is selectively adopted to replace the mode that the flexible plate is broken off after depth-controlled milling, and the machining quality and precision of the plate body are effectively improved.

The invention discloses a manufacturing method of a ligation clip and the ligation clip, the ligation clip comprises a V-shaped ligation clip body, the ligation clip body is made of a high polymer material, the ligation clip body is provided with a first clip arm, a second clip arm and an elastic connecting part, the end part of the first clip arm is provided with a lock hook, and the end part of the second clip arm is provided with a lock catch; the ligature clip further comprises metal wires arranged in the first clip arm, the second clip arm and the elastic connecting portion, a plurality of grooves are formed in the outer surfaces of the metal wires, the ligature clip body wraps the metal wires through an injection molding process, and anchoring portions extending into the grooves are arranged in the ligature clip body. According to the ligation clamp, a rigid-flexible composite implementation mechanism is adopted, the metal wire serves as a rigid core, the ligation clamp body made of a high polymer material serves as a flexible base body, in addition, mutual movement of the ligation clamp body and the metal wire is effectively prevented through combination of the groove and the anchoring part, the mechanical property bottleneck of a traditional single-material ligation clamp is broken through, and the durability of the ligation clamp is improved.

The present invention discloses an auxiliary spring that compensates for the height decrease due to the creep of a rubber body in a mechanical transmission manner, which includes a rigid core shaft, a rubber body vulcanized and bonded to the outer periphery of the core shaft, a metal outer sleeve vulcanized and bonded to the outer periphery of the rubber body, and a support plate horizontally installed on the top of the metal outer sleeve. A height lifting device is provided between the core shaft and the base. The lifting device includes a frame base, a lifting mechanism installed on the frame base, a torsion transmission mechanism, and a pressure storage mechanism. When the rubber body has crept and dropped to a set height, the carriage is in a heavy load condition, and the auxiliary spring encounters a downward overload impact, the support plate sinks and presses down the pressure storage mechanism, and the pressure storage mechanism temporarily stores the pressure. When the downward overload impact is released or the carriage heavy load is released, the pressure stored in the pressure storage mechanism causes the lifting mechanism to lift the auxiliary spring upward through the torsion transmission mechanism, thereby realizing the compensation for the decreased height of the auxiliary spring.

The invention discloses a manufacturing method of a thick-copper large-current-carrying high-flexibility hollowed-out circuit rigid-flexible combined board. The manufacturing method comprises the following steps: manufacturing a rigid core board of which the surface is provided with a copper layer and a prepreg; taking a flexible copper-clad plate to manufacture a first circuit pattern, and then manufacturing a first window corresponding to the flexible area to form a flexible plate; a single-face flexible copper-clad plate is taken, a second circuit pattern is manufactured corresponding to the first window, cutting is conducted corresponding to the flexible area, and then the single-face flexible copper-clad plate and the flexible plate are pressed to form a flexible core plate; the rigid core board and the flexible core board are stacked and laminated, then uncovering processing is carried out, laser milling is carried out on the second circuit pattern, and the rigid-flexible combined board is formed; low-flow glue prepregs are arranged among the layers, so that the risk of insufficient glue filling or uneven plate surface is reduced; a second circuit pattern is manufactured by using a single-sided flexible copper-clad plate, and the second circuit pattern and the first circuit pattern are designed in a staggered manner, so that an effect of adjusting colloid flow is achieved, and effective wrapping of the first circuit pattern is formed; and a hollow circuit is formed through laser milling, so that the bending performance of the flexible area is improved.

The invention relates to an antibacterial weather-resistant ASA composite material and a preparation method thereof, and belongs to the technical field of ASA composite material preparation. The composite material comprises the following raw materials in parts by weight: 100 parts of ASA resin, 30-50 parts of an antibacterial agent and 1-5 parts of an auxiliary agent, the antibacterial agent is a compound with an inorganic filler as a core and quaternary ammonium salt polyester as a shell. The antibacterial agent is formed by inorganic filler through two steps of surface grafting and surface condensation reaction, the core is a rigid core, the layer is a polyester elastic layer (the polyester layer contains a flexible chain of a polysiloxane chain), and the antibacterial agent can exert the synergistic toughness enhancing effect of rigid particles and the flexible chain while exerting the antibacterial performance of quaternary ammonium salt, so that the antibacterial property of the quaternary ammonium salt is greatly improved. The toughness performance of the ASA resin is improved.

The invention relates to a construction method of a rigid-flexible composite pile foundation, which is characterized in that a stirring head is mounted at the lower part of a steel pipe, the stirring head comprises a steel pipe section, a group of stirring blades are arranged outside the steel pipe, a conical part is arranged at the bottom of the steel pipe section, another group of stirring blades are arranged on the conical part, and a grouting pipe is arranged inside the steel pipe section; the grouting pipe comprises a vertical section which is vertically arranged in the steel pipe section and a horizontal section which is arranged above the group of stirring blades of the conical part, and the vertical section is communicated with the horizontal section; the steel pipe is driven to rotate through an upper power device, grouting is carried out on the horizontal section through the vertical section of the grouting pipe, and grouting is carried out while rotary stirring is carried out, so that a pile periphery stirring pile is formed; a cementing material is poured into the steel pipe to form a rigid core pile, the rigid core pile is located in the stirring pile around the pile, and the rigid core pile and the stirring pile are combined to form the rigid-flexible composite pile foundation. The composite pile has the advantages that the torsion resistance of the mixing pile is greatly improved, the drilling capacity of the mixing pile is greatly enhanced, and the bearing capacity and the deformation control capacity of the composite pile are greatly improved.

A crawler robot comprising a proximal end section, a distal end section and a central core section, through each section passes a central channel; the distal end section comprises a rigid core surrounding a deformable foot, the proximal end section comprises a rigid core surrounding a deformable foot, and the central core section comprises a deformable annular body surrounding an extension spring, surrounding the annular body is at least one balloon, and wherein fluid carrying conduits are connected to the balloon in the central core section, and to the deformable foot in the distal end section and the deformable foot in the proximal end section.

The invention relates to a dry spinning preparation method of low-shrinkage polyamide fibers, and belongs to the technical field of chemical fibers. Nano aluminum oxide and an enhanced modifier are introduced into a fiber raw material for synergistic modification, the fiber is endowed with excellent low shrinkage, the enhanced modifier can be anchored on the surface of a filler through the strong chelation of a molecular center, and meanwhile, polyether long chains on the periphery of the enhanced modifier and a polyamide matrix form dynamic hydrogen bond entanglement, so that the fiber has excellent low shrinkage. And a rigid core-flexible interface-polymer entanglement net structure is constructed. The structure can effectively limit slippage and rearrangement of a polyamide molecular chain on the premise that the spinning state is not remarkably increased, so that the breaking strength and toughness of the fiber are synergistically improved while the boiling water shrinkage rate and the dry heat shrinkage rate of the fiber are remarkably reduced, and the problems of spinning difficulty and obdurability imbalance caused by traditional filler modification are comprehensively solved.

The present invention discloses a manufacturing method for a rigid-flex printed circuit board with thick copper, large current-carrying capacity, and high flexibility and hollowed-out circuits. A rigid core board with a copper layer and a prepreg on its surfaces is manufactured. A flexible copper clad laminate is taken to manufacture a first circuit pattern, and then a first opening window is made corresponding to the flexible area to form a flexible board. A single-sided flexible copper clad laminate is taken, a second circuit pattern is made corresponding to the first opening window, and it is cut corresponding to the flexible area, and then it is laminated with the flexible board to form a flexible core board. The rigid core board and the flexible core board are stacked and laminated, and then the cover is removed for processing, and then the second circuit pattern is laser milled to form a rigid-flex printed circuit board. A low-flow prepreg is arranged between layers to reduce the risk of insufficient resin filling or uneven board surface. The second circuit pattern is made using a single-sided flexible copper clad laminate, and the second circuit pattern and the first circuit pattern are designed with a dislocation to play a role in adjusting the resin flow, forming an effective encapsulation of the first circuit pattern. The laser milling forms a hollowed-out circuit, thereby improving the bending performance of the flexible area.

The present disclosure relates to a rigid-core laminate that includes a core section formed of a first material with a first modulus of at least 50 GPa, a number of sacrificial sockets embedded in the core section through a potting material, a number of top dielectric layers formed over a top surface of the core section and covering a top surface of each sacrificial socket, a number of bottom dielectric layers formed underneath a bottom surface of the core section and covering a bottom surface of each sacrificial socket, and a number of tooling-holes. Herein, each sacrificial socket is formed of a second material with a second modulus that is smaller than the first modulus. Each tooling-hole extends vertically through the top dielectric layers, a corresponding sacrificial socket, and the bottom dielectric layers. No portion of the core section is exposed in any one of the tooling-holes.

The present invention describes the construction of sustainable modular buildings from end-of-life or reused wind turbine segments, promoting the circular economy and the “zero waste” concept. It discloses a modular building that follows structural mechanics and architecture strongly influenced by the introduction of wind turbine tower and blade segments at the end of their useful lives. The hollow section part of the tower will form the rigid core and the blades will form pillars and connecting beams that join these pillars to the central core. Valuing the hollow internal space of the components, there is also the incorporation of a fire fighting and safety system using a water circuit inside the structure, at the same time that it houses networks of the different tubes and pipes of the specialties present in a building. To improve anti-seismic behaviour and vibration control, cork is used as a connecting element and constituent of the expansion joints between structural elements.

This invention discloses a high-resilience EPDM rubber sealing gasket and its preparation method, belonging to patent classification number C08K13 / 02, and relating to the field of EPDM rubber technology. The method first introduces flexible segments composed of liquid polyisobutylene and hydroxyl-terminated polybutadiene into an EPDM matrix to construct a low-energy-consumption subelastic network; then, a core-shell structure filler with silica as a rigid core and acrylate copolymer as an elastic shell is prepared to eliminate the rigid constraints of traditional filler interfaces; simultaneously, hyperbranched polyesteramide and nano-boron nitride are introduced as a synergistic system to bridge the polarity difference between the flexible segments and the core-shell filler through molecular bridging, and to reduce energy loss by utilizing the low friction and thermal conductivity of nano-boron nitride. The resulting sealing gasket exhibits high resilience, low compression set, and excellent mechanical strength.

The invention provides a composite latex mold and a preparation method of an air bag. The composite latex mold comprises a core rod and a plurality of flexible supporting sets fixed to the core rod. The multiple flexible supporting sets are arranged around the axis of the core rod at intervals. Each flexible supporting set comprises two flexible supporting blades, and the two flexible supporting blades are arranged around the axis of the core rod at intervals. The hardness of the flexible supporting blade is larger than or equal to 60, the compression set ranges from 5% to 10%, and the elastic modulus is larger than or equal to 0.6 kgf / mm < 2 >. According to the technical scheme, the rigid core rod and the flexible supporting set with elasticity are adopted to form the composite latex mold, and when the air bag is prepared, demolding of the air bag can be facilitated through elastic deformation of the flexible supporting set. In addition, due to the elastic performance of the flexible supporting set, the diameter of the ball handle of the air bag can be made to be small.

A surface covering element can have a rigid core. The rigid core can include at least one densified fiber batt. The rigid core can have a first surface and an opposed second surface that are spaced apart along a first axis. The rigid core can have a plurality of edges that define a periphery of the rigid core. The plurality of edges can include at least a first edge and an opposed second edge that are spaced along a second axis that is perpendicular to the first axis. The first edge can include a tongue, and the second edge can define a groove.

The application discloses a manufacturing method of a rigid-flexible combined board of a cross type surface flexible layer, and comprises the following steps: taking a double-sided flexible copper-clad plate, forming a groove body on one of the copper layers and the insulating medium layer, forming an etching ablation groove, distributing the groove body corresponding to the edge of the flexible plate area, attaching a cover film in the groove body range, forming upper and lower flexible plates, manufacturing a rigid core plate layer and a prepreg, stacking and pressing to form a pressing plate, manufacturing an outer layer circuit pattern, and then forming a rigid-flexible combined board; optionally, manufacturing a windowed rigid core plate and a windowed prepreg, and stacking and pre-pressing one layer of flexible plates to form a groove body structure, setting a release pad in the groove body, and then stacking and pressing another layer of flexible plates to form a pressing plate; by setting the etching ablation groove on the flexible plate, it is ensured that the flexible plate will not cause a problem difficult to mill when being formed, and optionally, the setting of the release pad is used to replace the way of breaking off after depth control milling, so that the processing quality and precision of the plate body are effectively improved.

A manufacturing method of an outer flexible layer rigid-flexible combined board for an intelligent visual module comprises the following steps: manufacturing a flexible core board and a rigid core board attached with a release layer corresponding to an uncovering area, and then taking a prepreg layer and a copper layer; sequentially stacking and laminating the plates to form a laminated plate; the release layer faces the flexible core plate; the outer layer of the laminated plate is a flexible layer; a first through hole and a second through hole are drilled in the laminated plate, electroplating is carried out, depth-controlled drilling is carried out on the second through hole, the first through hole forms a conducting hole, the second through hole forms a depth-controlled hole, and the depth-controlled hole plate is integrally formed; resin hole plugging processing is carried out on the depth control hole, the depth control hole forms a solid via hole, then surface treatment and uncovering processing are carried out in sequence, then molding is carried out, and the whole board forms the rigid-flexible combined board; the processing flow is greatly simplified, and the processing precision is improved; and the thickness and rigidity of the integrally pressed plate body are enhanced, so that the stability in the polishing process is improved, and the problems of excessive polishing, excessive expansion and shrinkage or breakage of the flexible layer are effectively avoided.

The present invention provides a device for generating cement-soil solidified materials by injecting cement in the same hole and in layers, which relates to the technical field of grouting reinforcement of underground engineering. The device can confine grouting to any section to achieve the purpose of segmented grouting, and has a simple structure, ingenious design, and is easy to implement. The device includes an elastic grouting outer tube, a rigid core tube sleeved inside the grouting outer tube, and a pointed bottom provided at the bottom of the grouting outer tube. The wall of the core tube is provided with a plurality of long strip openings, and the outside of each of the openings is provided with a plurality of blockers for adjusting the slurry outlet position. The wall of the grouting outer tube is provided with grouting holes. Each of the openings corresponds to a plurality of grouting holes. A one-way expansion ring is provided outside each of the grouting holes. During grouting, the grouting holes that do not need grouting are sealed and connected to the corresponding blockers. The grouting position can be adjusted by changing the position of the blockers to seal the grouting holes at different positions. The technical solution provided by the present invention is applicable to the process of underground grouting reinforcement.

The invention relates to the field of fiber composite material workpieces, and discloses a core mold and a preparation method thereof, a fiber composite material workpiece and a production method thereof, and a cantilever crane machine.The core mold comprises a rigid core mold layer (12) and an expansion core mold layer (2) wrapping the periphery of the rigid core mold layer (12); a plurality of groups of mutually independent heating elements are embedded in the expansion core mold layer (2), so that the heating elements can be controlled to heat different parts of the expansion core mold layer at the same or different heating powers, and the expansion core mold layer is heated to expand. In the production of the fiber composite material part, the core mold can carry out partitioned heating control on different regions of the part by regulating and controlling the heating power of each group of heating elements in real time through a plurality of groups of heating elements which are arranged according to the structure of the part and are mutually independent; therefore, sufficient and uniform forming pressure can be applied to each part of the fiber winding layer, and the fiber winding layer can be uniformly heated and cured, and the method is suitable for production of super-thick, super-long and super-complex structural arm supports.

The present application relates to the technical field of silt soft soil foundation treatment, and discloses a silt soft soil foundation treatment method based on a synergistic reinforcement mechanism, which comprises three main construction procedures of rigid core area construction, pile-surrounding transition area construction and surface layer reinforcement area construction; the pile-surrounding transition area construction is started after the concrete of the cast-in-place pile reaches 1MPa in the initial setting stage and is completed before the final setting of the concrete of the cast-in-place pile. Through the innovative structural design and the accurate process timing, the present application realizes the deep synergy between the cast-in-place pile and the high-pressure jet grouting, and significantly improves the overall rigidity, bearing capacity and anti-uniform settlement capacity of the foundation.

The invention discloses an impact-resistant electronic component waterproof powder coating and a preparation process thereof, and relates to the technical field of electronic component coatings, the impact-resistant electronic component waterproof powder coating comprises epoxy resin, a curing agent, an inorganic filler, an organosilicon modified hyperbranched polyester flexibilizer and an auxiliary agent; the organic silicon modified hyperbranched polyester toughening agent is prepared by the following steps: carrying out melt polycondensation on a polyhydroxy compound and excessive polybasic acid anhydride which are used as raw materials to construct a carboxyl-terminated hyperbranched polyester core, and partially grafting the core by utilizing polysiloxane containing an epoxy group to introduce a flexible hydrophobic chain segment, so as to obtain the organic silicon modified hyperbranched polyester toughening agent. And carrying out end-capping modification on the residual end carboxyl group by using epoxy chloropropane under an alkaline condition. By constructing a chemically anchored rigid core-flexible shell topological structure, impact energy and thermal stress are effectively dispersed, excellent heat resistance and dimensional stability are maintained while the coating is prevented from cracking, phase separation and water vapor permeation are completely eradicated through a built-in compact hydrophobic network, and lasting and reliable mechanical protection and insulation guarantee are provided.

The invention relates to a preparation method of a functional super-hydrophobic emulsion based on the viscosity of a polyurethane pressure-sensitive adhesive. According to the method, a polyurethane pressure-sensitive adhesive is adopted, a polyurethane prepolymer containing a hydrophilic group is obtained through step-by-step polymerization of a reaction monomer, a hydrophilic polyurethane macromolecular chain serves as an emulsifier, a free radical polymerization monomer and a functional raw material are emulsified, polymerization is initiated under the action of an initiator, and the hydrophilic pressure-sensitive adhesive is obtained. The core-shell structure composite microsphere is characterized by a rigid core (functional polymer microsphere) and a flexible shell (polyurethane). According to the invention, the production process is simplified, the chromatic aberration is eliminated, the problem of performance weakness of a single material is solved through a structural-chemical synergistic effect, and the super-hydrophobic performance is realized.

A strap may include fabric and may be configured to attach an electronic device such as a wristwatch or head-mounted device to a user's body. The fabric strap may include a closing mechanism that attaches a first fabric portion of the strap to a second fabric portion of the strap. The closing mechanism may include a first array of posts on the first fabric portion and a second array of posts on the second fabric portion. The first array of posts may engage with the second array of posts to attach the first fabric portion to the second fabric portion. The posts may be printed on the fabric using additive manufacturing equipment, which allows the closing mechanism to be integrated into the fabric. Each post may include a rigid core and soft covering that deforms when the posts are engaged.

The invention discloses a fabric hybrid electronic integrated system with a stretchable interface. The fabric hybrid electronic integrated system comprises a laser modified fabric substrate, a rigid chip, a printed electrode and a printed interconnection wire. The laser modified fabric is obtained by irradiating a photosensitive polymer composite fabric with laser, can be designed in a customized manner and manufactured in one step by regulating and controlling laser parameters, and simultaneously realizes three different effects: (1) the interface bonding of a printed layer is enhanced; (2) the cross-layer short circuit of the interconnected wires is inhibited; and (3) strain isolation among the rigid chip, the elastic fabric and the interconnected wires. The mechanically enhanced and surface modified fabric realizes heterogeneous integration of a rigid chip and a circuit on the fabric, has interface stretchability, and has potential in the fields of wearable health management and human-computer interaction.

The invention relates to the technical field of water-based emulsions, in particular to an anti-after-tack cross-linking hybrid acrylic emulsion for coatings and printing ink and a preparation method of the anti-after-tack cross-linking hybrid acrylic emulsion. Through a furan-maleimide thermal reversible crosslinking system, a dynamic covalent network is constructed, reversible opening and closing and energy absorption are realized under thermal stress, microcracks are effectively inhibited, and the problem of after-tack durability is solved; gradient temperature polymerization and interface enhancement have a synergistic effect: furan modified silica sol provides a rigid core, gradient temperature control ensures uniform proceeding of a cross-linking reaction, nano-zinc oxide enhances interface bonding, and multi-feature synergy improves the comprehensive performance of the emulsion; high-speed shearing emulsification and three-step temperature control ensure narrow particle size distribution and good rheological stability of the emulsion, and solve the problem of phase separation in storage and construction. The emulsion prepared by the invention can effectively inhibit the generation of microcracks in an environment with a relatively large temperature difference and an environment with a dynamic temperature change or a circulating heat effect, and ensures the durability of after-tack resistance.

The utility model discloses a ceramic tube target forming device, which is used for solving the problems of non-uniform powder filling and poor exhaust effect during cold isostatic pressing forming of a ceramic tube target in the prior art. The device comprises a cylindrical elastic leather sheath formed by pouring polyethylene resin and a cylindrical rigid core rod concentrically arranged with the cylindrical elastic leather sheath, wherein the cylindrical elastic leather sheath and the cylindrical rigid core rod form an annular powder filling space; the bottom sealing assembly and the top sealing assembly respectively seal the bottom and the top of the powder filling space; the vibration device is arranged below the bottom sealing assembly, comprises a flat-plate-shaped placing part and is used for placing a leather sheath and a core rod, and the powder in the powder filling space is tamped through vibration; the powder filling device is arranged at the top of the leather sheath and used for filling powder into the powder filling space. The device disclosed by the utility model is simple in structure and convenient to operate, can realize uniform filling and effective exhausting of powder, and improves the forming quality and the yield of the ceramic tube target.

A downhole sealing apparatus for location in a downhole tubular includes a ball and a downhole seat. The ball may comprise a rigid core and a deformable covering. The ball is translatable downhole towards the seat, the ball and the seat having an open first configuration and a sealing second configuration. In the open first configuration the ball and seat are spaced apart such that fluid may flow through the seat. In the sealing second configuration the ball and the seat are in sealing engagement and the ball is deformed to maintain the sealing engagement with the seat in response to a differential pressure acting in a first axial direction and in response to a differential pressure acting in an opposite second axial direction.

The invention provides a low-warpage glass fiber reinforced nylon composite material and a preparation method thereof. The low-warpage glass fiber reinforced nylon composite material comprises 40-60 parts of PA6 resin; 20 to 30 parts of glass fiber; 0-20 parts of transparent nylon; 0.5 to 1.5 parts of two-phase nano particles; 0.2 to 0.4 part of an antioxidant; 0.2 to 0.5 part of a lubricant; 0.1 to 0.5 part of a nucleating agent; wherein the two-phase nano particle has a shell-core structure, the core of the two-phase nano particle is SiO2, the shell layer of the two-phase nano particle is modified polysiloxane, and the surface of the shell layer is grafted with a bifunctional group containing an amino group and a hydroxyl group. Benefited from the synergistic effect of the core-shell structure and the surface bifunctional group of the two-phase nano particles, the two-phase nano particles are uniformly dispersed in the nylon matrix, and good interface bonding is formed; and meanwhile, the combined structure of the rigid core and the flexible shell layer effectively adjusts the internal stress distribution of the material, reduces anisotropic shrinkage caused by glass fiber orientation, and remarkably improves the dimensional stability and mechanical properties of the composite material.

One embodiment of a collectible sleever tool. The tool is comprised of a semi-rigid core 3 of a paper material with each surface covered with a material layer 2 of soft, smooth, clear, archival-quality biaxially oriented polypropylene (BOPP), that when configured together comprises a collectible sleever tool 1. It can be used to help place a collectible card 4 into a collectible item protective sleeve 5. The tool provides for advantageous handling, movement, protection, and storage of collectibles. Other embodiments are described as shown.