327 results about "Fiber breakage" patented technology

The invention discloses a textile fabric defect detection system, relates to the technical field of textile fabric defect detection, and is beneficial to comprehensively evaluating the appearance quality of textile fabrics by collecting the number of hair balls, a color difference value and the area of a color difference region in an external defect parameter collection process. The pilling phenomenon on the surface of the textile fabric can be accurately recognized by collecting the number of the hair balls, the overall appearance and the service life of the textile fabric can be affected by the hair balls, non-uniformity of the textile fabric in the dyeing process can be revealed through measurement of the color difference value, and the severity degree of the color difference problem can be determined through statistics of the area of the color difference region. In the external defect evaluation process, whether the textile fabric meets the quality standard or not can be objectively judged by analyzing the external defect evaluation index of the specified textile fabric, and in the structural defect analysis process, the structural performance of the textile fabric can be comprehensively known by collecting the fiber breaking strength, the fiber density and the porosity.

The invention discloses an automatic testing device and method for multi-directional tensile strength of textiles based on constant tension, and relates to the technical field of tensile strength detection.The automatic testing device comprises a rigid rack system, and a high-elastic fabric optical response mechanism is integrated on a double-stand-column portal frame of the rigid rack system; the fiber damage process is reflected through the light transmittance of light to the fabric and the light spot change; the high-elastic fabric optical response mechanism comprises a sealing light insulation assembly, a light source assembly and an imaging assembly. The light source assembly comprises pulse LED light source arrays arranged at equal intervals in the fabric stretching direction, a lampshade and a transverse movement driving unit. The problems that in the prior art, when the tensile strength of a fabric is detected, only the limit value when a sample is completely broken can be recorded, and microcracks generated by step-by-step failure of fibers in the stretching process cannot be captured are solved. The device has the advantages that when the tensile strength of the fabric is detected, the fiber fracture process in the fabric is directly reflected through the change of light spots formed by light penetrating through the fabric, and the like.

The invention relates to the field of carbon fiber composite material mechanics, in particular to a fine evaluation method for the strength of a small-size large or full-opening CFRP (carbon fiber reinforced plastic) shell, which comprises the following steps: establishing a microscopic damage model containing material anisotropy, defining damage variables and evolution equations, uniformly quantifying multi-scale damage behaviors such as fiber fracture, matrix cracking and layered expansion, and evaluating the strength of the small-size large or full-opening CFRP shell. The problem that a traditional single-scale model cannot represent the multiphase coupling effect is solved; through cross-scale transmission of damage variables, whole-process prediction from microscopic damage initiation to macroscopic failure is realized, and the precision of strength evaluation of the complex opening structure is significantly improved. The method realizes refinement, reliability and engineering practicability of strength evaluation of the small-size large-opening or full-opening CFRP shell, is particularly suitable for the fields of aerospace and the like with extremely high requirements on structural weight and safety, and has remarkable technical leading and application value.

The invention relates to the technical field of AI intelligent routing inspection, in particular to an AI intelligent routing inspection control system, which comprises an optical fiber fracture monitoring module for monitoring operation state data of an optical fiber link in a wavelength division optical transmission system and judging an optical fiber fracture position and fracture degree by using an AI anomaly detection model; the optical power safety regulation and control module is used for automatically reducing the luminous power to a safety level according to the fracture position and the fracture degree of the optical fiber and based on an optical power dynamic regulation and control algorithm; the link recovery detection module is used for judging whether the optical fiber link is recovered or not; monitoring transmission performance parameters of the optical fiber; the communication control module is used for controlling the switching of communication states according to the fault alarm information of the optical fiber fracture monitoring module and the recovery confirmation signal of the link recovery detection module; and an inspection recording module. According to the invention, through the automatic recovery mechanism, the response speed of the system after fracture repair is greatly improved, manual intervention is reduced, and the overall self-healing capability is enhanced.

The invention provides a method for establishing a large fiber cutting angle carbon fiber composite material cutting model, and relates to the technical field of carbon fiber composite material cutting processing. The establishment method comprises the following steps: firstly, establishing a large-fiber cutting angle single-fiber cutting model considering the change of the contact state of cut fibers and a cutter in the CFRP cutting process, the multidirectional constraint effect of the cut fibers and fiber fracture; then establishing a CFRP cutting model considering the extrusion effect of the cutting edge and fiber micro-buckling failure; and finally, establishing a CFRP macroscopic cutting force prediction model containing a fiber bending area and a fiber extrusion area, and verifying the accuracy of the cutting model in combination with experiments. According to the method, the fiber deformation and fracture process, resin and interface cracking and the extrusion effect of a cutting edge on the fibers can be represented, the influence of large fiber cutting angle fiber fracture on machining surface pit damage and the quantitative relation between macroscopic cutting force and machining parameters are obtained, and a basis is provided for tool design and technological parameter formulation.

The invention belongs to the technical field of fiber metal laminates, and particularly discloses an anti-shearing fiber metal laminate and a preparation method thereof. A stainless steel ultra-thin belt, carbon fiber woven cloth and one-way carbon fiber prepreg are laid according to a laying scheme of [W / [G / 0 / G / 90] 2 / Gc] s, modified epoxy resin is coated between every two layers in the laying process, and the anti-shearing fiber metal laminate is obtained after curing; wherein W represents the carbon fiber woven cloth, G represents the stainless steel ultra-thin strip, 0 represents the unidirectional carbon fiber prepreg laid at 0 degree, 90 represents the unidirectional carbon fiber prepreg laid at 90 degrees, Gc represents the central layer, s represents the symmetrical laying layers along the central layer, and 2 represents the repetition frequency of [G / 0 / G / 90]. According to the prepared anti-shearing fiber metal laminate, the anti-shearing performance of the fiber metal laminate is greatly improved, and the possibility of damage such as layering damage, matrix fracture, fiber fracture and metal plastic deformation is reduced.

The invention relates to the technical field of aromatic polyamide high polymers, in particular to a modified poly-p-phenylene terephthamide fiber with high elongation at break and a preparation method of the modified poly-p-phenylene terephthamide fiber. According to the invention, a small amount of 3, 4-difluorobenzene is introduced According to the preparation method, the third monomer containing 4, 4 '-diaminodiphenyl ether and the fourth monomer containing a diaminophenoxy functional group are added, and the molar ratio of the third monomer and the fourth monomer in the total amount of the diamine monomer is controlled, so that the rigid molecular chain structure of the conventional para-aramid fiber is destroyed to a certain extent, the breaking strength of the fiber is maintained, the elongation at break of the polymer fiber is enhanced, and the service life of the polymer fiber is prolonged. The prepared modified poly-p-phenylene terephthamide can still adopt a dry-jet wet spinning process, the cost of a new production line of a factory is saved, the fiber with stable elongation at break index is obtained by optimizing process conditions and parameters, and the elongation at break of the prepared fiber is 3.6% or above.

The invention discloses an intelligent detection system and method for the fracture specific strength of cotton fibers, and relates to the technical field of cotton fiber detection, and the intelligent detection system for the fracture specific strength of the cotton fibers comprises a sampling module, an image acquisition module, a resistance measurement module, a strength measurement module and a central control module. The sampling module is used for sampling on a cotton fiber sample and constructing the sample into a to-be-detected cotton fiber bundle; the image acquisition module is used for acquiring image information of a to-be-detected cotton fiber bundle; the resistance measurement module is used for measuring resistance information of the to-be-detected cotton fiber bundle; the strength measurement module is used for snapping the to-be-detected cotton fiber bundle from a fracture area of the to-be-detected cotton fiber bundle and recording real-time tension information and displacement information of the fracture area; the central control module is in communication connection with the image acquisition module, the resistance measurement module and the strength measurement module. According to the invention, the detection of the cotton fiber fracture specific strength in a non-standard laboratory environment can be realized.

The invention relates to the technical field of fibers, and discloses a preparation method of antibacterial modified fibers for textile fabrics, nylon 6 and copper-tea polyphenol-based hyperbranched polyamide are added into formic acid, the mixture is stirred and then spun by an electrostatic spinning machine, and the antibacterial modified fibers for the textile fabrics are obtained. The hyperbranched polyamide has good compatibility with nylon 6, contains a three-dimensional dendritic hyperbranched molecular chain, has a good toughening effect on nylon 6 fibers, and enables the fibers to maintain good breaking strength while improving the elongation at break of the fibers. The copper-tea polyphenol-based hyperbranched polyamide contains tea polyphenol active antibacterial substances and antibacterial copper ions, so that the antibacterial performance of the fiber is remarkably improved. Meanwhile, the copper ions, the tea polyphenol and the catechol-based hyperbranched polyamide form a tight and firm coordination effect, and the copper ions and the tea polyphenol are also difficult to elute from a fiber matrix, so that the fiber still keeps excellent antibacterial performance.

The invention discloses a method for patching and repairing a silicon carbide ceramic matrix composite part of an aero-engine, which comprises the following steps: using a CMC-SiC patch as a structure for patching and repairing part cracks, corrosion pits or fiber cracks, preparing surface textures on the contact surface of the CMC-SiC patch and the part by using pulse laser, coating brazing filler metal on the contact surface of the CMC-SiC patch and the part, and preparing the surface textures on the contact surface of the CMC-SiC patch and the part. And the CMC-SiC patch and the surface of the part are pressed tightly, and patching and repairing of the silicon carbide ceramic matrix composite part of the aero-engine are completed after vacuum brazing, polishing, cleaning and drying, environmental barrier coating recovery and annealing. According to the repairing method, a patching technology is adopted, a force transmission path at cracks, corrosion pits or fiber fractures is rebuilt, the strength of the part is recovered, and the repairing problem of relatively serious damage such as relatively wide cracks, corrosion pits or fiber fractures on the silicon carbide ceramic-based composite part is solved. In addition, specific textures and shapes are prepared on the binding face of the CMC-SiC patch and the part through pulse laser, and the optimal combination effect and joint strength of the brazing filler metal, the patch and part base metal are accurately achieved.

The invention belongs to the technical field of functional fibers, and relates to colored multi-groove type regenerated polyester staple fibers and a preparation method thereof. The preparation method comprises the following steps: carrying out melt blending on the regenerated polyester and the color master batch, and spinning by a multi-groove spinneret plate to obtain the colored multi-groove regenerated polyester staple fiber. The cross section of the fiber is of a multi-groove structure, the linear density of the fiber is 3.33-11.11 dtex, the linear density deviation rate is-8%-8%, the breaking strength of the fiber is 3.3-4.5 cN / dtex, the elongation at break is 28.2-43.5%, the content of super-long fibers is 0-3 mg / 100 g, the defect content is 5-50 mg / 100 g, the crimp number is 9-13 / 25 mm, the crimp rate is 10%-16%, the fiber forming degree is larger than or equal to 85%, and the color fastness is larger than or equal to 4. The colored multi-groove type regenerated polyester staple fiber prepared by the method has good mechanical properties, color fastness and forming degree, ensures the quality of regenerated polyester, realizes efficient regeneration and utilization of waste polyester, can be applied to preparation of various clothing products, and has good development prospects.

The utility model discloses a carbon fiber prepreg cloth yarn spreading device which comprises installation frames, a yarn inlet and yarn spreading rollers, a plurality of yarn spreading rollers are installed between the installation frames, ultrasonic vibrators used for controlling the yarn spreading rollers are installed outside the installation frames, the number of the ultrasonic vibrators is the same as that of the yarn spreading rollers, and the number of the yarn spreading rollers is larger than that of the installation frames. A cleaning plate is mounted in the mounting frame, the cleaning plate is arranged below one yarn spreading roller in a sleeving manner, and the cleaning plate is located below the yarn inlet; according to the scheme, through the synergistic effect of the cleaning brush and the cleaning plate, presoaking liquid residues on the surface of the yarn spreading roller can be cleaned in the yarn spreading process, the presoaking liquid residues are prevented from being attached to the surface of the yarn spreading roller, and therefore the yarn spreading quality of the carbon fiber prepreg cloth is improved; and the problems of non-uniform stretching, fiber breakage and the like of the carbon fiber prepreg cloth caused by the residue of the prepreg liquid are avoided.

The invention belongs to the technical field of preparation of bio-based functional fibers, and relates to a preparation method of high-shrinkage polyethylene furandicarboxylate fibers. The preparation method comprises the following steps: drying the polyethylene furandicarboxylate slices, and carrying out melt blending spinning to obtain the high-shrinkage polyethylene furandicarboxylate fiber. The linear density of the fiber is 2.22-4.44 dtex, and the linear density deviation ratio is-5%-5%. The breaking strength of the fiber is 3.5-4.5 cN / dtex, the elongation at break is 53.5-68.5%, the content of super-long fibers is 0-3 mg / 100 g, the defect content is 3-20 mg / 100 g, the crimp number is 12-15 / 25 mm, the crimp rate is 14-18%, and the boiling water shrinkage rate is 60-80%. The prepared high-shrinkage polyethylene furandicarboxylate fiber is a 100% high-shrinkage polyester fiber, the performance of the fiber is far superior to that of a conventional high-shrinkage fiber, and the high-shrinkage polyethylene furandicarboxylate fiber can become a substitute product of PET.

The utility model relates to the technical field of injection molds, in particular to a dipping mold for a fiber reinforced composite material, which comprises a first mold plate, a second mold plate and a forming cavity arranged between the first mold plate and the second mold plate, the forming cavity comprises a feed port, a plurality of mold cavities and a discharge port, fibers enter from the feeding port, bypass the impregnation module and are discharged from the discharging port, the forming cavity is further communicated with a feeding port used for feeding resin melt, and the impregnation module which rotates to adjust tension is arranged in the mold cavity. According to the dipping mold for the fiber reinforced composite material, the dipping module in each mold cavity can rotate to adjust the tension applied to the fiber in the mold cavity, so that the poor dipping effect caused by too small tension and too small contact area of the fiber and a resin melt is avoided, and meanwhile, the fiber breakage caused by too large tension is avoided; therefore, the product impregnation effect is effectively improved.

Employing methodologies and systems to detect damage initiation and growth inside a composite material (matrix cracking, delamination, fiber break, fiber pullout, etc.) wherein damage produces high-frequency acoustic emission (AE) waves that are transported to recording sensors along with relatively lower frequency waves representing the flexural deformation of the impacted composite structure.

The invention discloses a modified heterocyclic aramid fiber and a preparation method thereof, and belongs to the technical field of high-performance organic fibers. The invention discloses a preparation method of a modified heterocyclic aramid fiber, which comprises the following steps: by taking 2-(4-aminophenyl)-5-aminobenzimidazole, p-phenylenediamine, isophthaloyl chloride and paraphthaloyl chloride as raw materials and LiCl as a catalyst, carrying out polymerization reaction in a solvent to obtain a polymer, and then spinning to obtain the modified heterocyclic aramid fiber. The invention also discloses the modified heterocyclic aramid fiber prepared by the method. According to the invention, m-phthaloyl chloride is creatively used for replacing a part of paraphthaloyl chloride and is subjected to nucleophilic reaction with 2-(4-aminophenyl)-5-aminobenzimidazole and p-phenylenediamine, so that the elongation at break of the fiber can be greatly improved under the condition that the breaking strength and other weather resistance of the original fiber are basically unchanged.

The invention belongs to the technical field of nylon 66, and particularly relates to a production method of 8-shaped nylon 66 hollow fibers. The 8-shaped nylon 66 hollow fiber is prepared from four symmetrical C-shaped spinneret orifices, and the 8-shaped nylon 66 hollow fiber is obtained through nylon 66 slice solid-phase drying tackifying, melting, mixing, metering, spinning, cooling forming, oiling, stretching forming and winding forming. The breaking strength of the produced fiber is 2.8-3.1 cN.dtex-1, the elongation at break is 40-55%, the dry heat shrinkage rate is 3.5-4.5%, the hollow regularity is good, various physical indexes meet the requirements of customers, and the new market requirements are met.

The present invention belongs to the technical field of the preparation of bio-based functional fibers, and relates to a preparation method of highly shrinkable polyethylene furandicarboxylate fibers. Preparation method: The polyethylene furandicarboxylate chips are dried and then melt-blended and spun to obtain highly shrinkable polyethylene furandicarboxylate fibers. The linear density of the fibers is 2.22 - 4.44 dtex, and the linear density deviation rate is -5% - 5%. The breaking strength of the fibers is 3.5 - 4.5 cN / dtex, the breaking elongation rate is 53.5 - 68.5%, the content of ultra-long fibers is 0 - 3 mg / 100 g, the content of defects is 3 - 20 mg / 100 g, the number of crimps is 12 - 15 per 25 mm, the crimp rate is 14% - 18%, and the boiling water shrinkage rate is 60 - 80%. The highly shrinkable polyethylene furandicarboxylate fibers prepared by the present invention are 100% highly shrinkable polyester fibers, and the fiber properties far exceed those of conventional highly shrinkable fibers, and can become an alternative product to PET.

The invention relates to the field of a characterization method of a damage mechanism of a carbon fiber composite material, in particular to a characterization method of a microscomic damage mechanism of a small-size large or full-opening CFRP (Carbon Fiber Reinforced Plastics) shell, which comprises the following steps of: systematically researching initiation positions, expansion paths and interaction mechanisms of fiber fracture, matrix cracking and interface debonding in an opening area; determining the influence of multi-axial stress, dynamic load and temperature gradient on damage distribution and expansion rate; secondly, establishing cross-scale quantitative correlation; through multi-modal experimental data, a quantitative relation between microscopic damage parameters and macroscopic mechanical properties is constructed, and accurate mapping from material microscopic behaviors to structure macroscopic responses is achieved; and finally, constructing a damage high-precision characterization method. A damage model taking layer design, machining precision and environmental load into consideration is developed, the problems that a multi-damage coupling mechanism is not clear and cross-scale modeling depends on experience are solved, and theoretical support is provided for shell anti-damage design.

The invention discloses a cashmere fiber length measurement method and system based on a convolutional neural network, and a medium, and belongs to the technical field of cashmere fiber detection, and the cashmere fiber length measurement system based on the convolutional neural network comprises an obtaining and processing module which obtains and processes an actual to-be-detected cashmere fiber sample image; the calculation module is used for calculating the average fiber length of the actual cashmere fiber sample to be detected by using the fiber fracture repair model and the fiber cross detection model; the display module is used for displaying, outputting and calculating the average fiber length of the actual to-be-detected cashmere fiber sample. The method can detect the average length of cashmere fibers.

The invention provides cotton and linen blended mattress spring wrapping cloth and a preparation method thereof, and belongs to the field of non-woven fabrics. The preparation method of the cotton and linen blended mattress spring wrapping cloth comprises the following steps: opening, cleaning and mixing, carding, lapping, needling and reinforcing, and post-processing. According to the cotton and linen blended mattress spring wrapping cloth and the preparation method thereof, the green sustainable development concept can be achieved, and the mechanical property and corrosion resistance of the mattress spring wrapping cloth can be improved while the anti-aging performance of the non-woven fabric is improved; meanwhile, in the preparation process of the cotton and linen blended mattress spring wrapping cloth, the problems that the tangling state is difficult to control, the blending uniformity is poor, the hardness style is difficult to control and the overall performance of the mattress spring wrapping cloth is unstable due to inconsistent characteristics of raw material fibers can be effectively avoided; and fiber breakage in the carding process is effectively avoided, fiber adhesion in the lapping process is avoided, and the preparation yield of the mattress spring wrapping cloth is increased.

The invention relates to the field of fiber detection, and discloses a textile fiber breakage intelligent detection method based on ultrasonic imaging analysis, which is used for solving the problem that fine or locally worn fiber breakage signals are ignored due to interference of ultrasonic signals when textile fiber breakage is analyzed through ultrasonic imaging. The method comprises the following steps: acquiring a running state image of textile fibers by using ultrasonic imaging equipment, analyzing the running state image of the textile fibers to obtain a fiber breakage index, carrying out first-time fiber breakage judgment according to the fiber breakage index, and if the first-time fiber breakage judgment is fiber breakage, directly sending out a breakage early warning prompt. If it is judged that the fibers are normal through the first-time fiber breakage, the current environment data are collected and analyzed to obtain the ultrasonic affected index, the actual breakage judgment threshold value is obtained according to the ultrasonic affected index, second-time fiber breakage judgment is carried out, and the situation that breakage signals are ignored due to tiny fiber breakage is effectively reduced.

The invention discloses an chemi-mechanical pulp production method capable of improving the filtration property of chemi-mechanical pulp, and relates to the technical field of papermaking, high-concentration grinding freeness is optimized to 640 + / -30ml, pulp fine fibers can be controlled at 22%-33%, the tensile index middle-lower limit and the bulk middle-upper limit, the high-concentration grinding effect is improved, the effect between fibers is facilitated, the effect between the fibers and a grinding sheet is reduced, and the filtration property of the chemi-mechanical pulp is improved. Fiber cutting is reduced, and the content of pulp fine fibers is reduced; the MSD torque is increased to 250 + / -10 KNM, the tearing effect of wood chips is improved, the preimpregnation reaction of the wood chips is facilitated, the original fine content is controlled to 26%-29% from original 22%-33%, the pulp bulk is increased by about 0.1 cm < 3 > / g, and the tensile index is increased by 1.0 N.m / g; the four low-concentration grinders are changed into parallel connection, so that the residence time of pulp in the low-concentration grinders is prolonged, the cutting effect of the pulp ground by the low-concentration grinders on fibers is reduced, light friction between grinding sheets and the fibers is increased, fibrillation of the fibers is facilitated, the bulk and the tensile strength are improved to a certain extent, and under the content of fine fibers, the size of the fibers is reduced. And the bulkiness and the tensile index of the finished pulp are also improved to a certain extent.

The invention discloses a high-toughness anti-ultraviolet PET (Polyethylene Terephthalate) fiber and a preparation method thereof, belongs to the technical field of polyester fibers, and is used for solving the technical problem that the mechanical strength, the ultraviolet resistance and the moisture absorption and quick drying performance of the PET fiber in the prior art need to be further improved. The invention relates to a high-toughness anti-ultraviolet PET (Polyethylene Terephthalate) fiber which is prepared from modified PET, modified polyester, modified montmorillonite, epoxy modified polysiloxane and an additive in a weight ratio of (55-60): (30-35): (10-16): (20-30): (3-5), according to the invention, the modified montmorillonite is used as a heterogeneous nucleation point, and a PET molecular chain composed of the modified PET, the modified polyester and the epoxy modified polysiloxane is induced to be arranged in a height orientation manner along the drafting direction, so that the breaking strength of the PET fiber is improved, a relatively high elongation at break is maintained, and the anti-ultraviolet effect and the moisture-absorbing and quick-drying performance of the PET fiber are improved.

The invention relates to a melt impregnation device and method for a continuous fiber reinforced thermoplastic composite material, and belongs to the technical field of composite material forming. A lower die dipping tank in the device is provided with a fiber inlet and a prepreg outlet, a plurality of variable-diameter dipping rollers are arranged between the fiber inlet and the prepreg outlet, the two ends of each variable-diameter dipping roller are a large-diameter end and a small-diameter end respectively, the large-diameter ends and the small-diameter ends are connected through smooth roller surfaces, and the small-diameter ends of the adjacent variable-diameter dipping rollers face opposite directions; the mold cover plate covers the lower mold dipping tank, the upper mold cover plate is provided with a plurality of downward supporting blocks, the supporting blocks are located between the adjacent variable-diameter dipping rollers, and the lowest points of the supporting blocks are lower than the highest points of the small-diameter ends of the variable-diameter dipping rollers. Through the variable-diameter design of the variable-diameter dipping roller, the supporting blocks and the fiber guide columns are matched, the unfolding effect of fibers is maintained and improved, the problems of fiber breakage, gathering and twisting are effectively solved, and high-quality output of prepreg is ensured.

The present invention relates to an ABS composite material and a preparation method thereof, belonging to the technical field of polymer materials. The present invention is obtained by modifying ABS and simultaneously blending it with sisal fiber, carbon fiber, long glass fiber, and copolymerized polypropylene; in the present invention, sisal fiber, carbon fiber, long glass fiber, and copolymerized polypropylene are blended with modified ABS powder, increasing the stiffness and strength of the ABS composite material; through fiber fracture, fiber pull-out, and the expansion of matrix cracks, the impact toughness of the ABS material is enhanced, achieving the effect of dissipating impact energy, and also improving the durability and lifespan of ABS products; ABS is modified to form modified ABS powder, improving the bonding force between modifier particles and fibers, enabling the ABS composite material to have good toughness, with significant improvement in mechanical properties. At the same time, the toughness, stiffness, and hardness of the products made of ABS are also improved.

The utility model provides a yarn guide device for pultrusion process, which comprises a plurality of layers of creels, the top of each layer of creel is detachably provided with a plurality of yarn guide plates along the X-axis direction, the yarn guide plates are provided with yarn threading holes side by side along the Y-axis direction, and the yarn threading holes are arranged in the X-axis direction. Yarn threading holes are formed in the yarn guide plates, the yarn threading holes in the yarn guide plates are sequentially increased progressively according to the number difference value of the yarn threading holes in the two adjacent yarn guide plates, the yarn guide device further comprises a fixing assembly used for assembling all the yarn guide plates into a whole in an attached mode, and when the yarn guide plates are assembled into the whole in an attached mode, the corresponding yarn threading holes in the yarn guide plates are coaxially formed and coincide. During yarn threading, the yarn guide plates are taken down and are tightly fixed together through the fixing assemblies, so that the corresponding yarn threading holes in all the yarn guide plates coincide, yarn bundles of yarn bundle rolls can conveniently penetrate through the corresponding yarn threading holes in the yarn guide plates at a time, rapid and accurate yarn threading of the yarn bundles can be achieved, a large amount of manpower is saved, yarn bundle crossing and fiber scratching and fuzzing during yarn threading are avoided, and the yarn threading efficiency is improved. And even the fiber is snapped.

The invention relates to the technical field of fiber performance test and evaluation, in particular to a method for rapidly measuring the fiber breakage rate of a fiber bundle by combining a computer and amplification equipment. The invention provides a rapid detection method of a fiber end breakage rate. The detection method comprises the following steps: S1, preparing a sample; s2, obtaining a fiber cross section; s3, automatically identifying the image; and S4, calculating the fiber end breakage rate. According to the method, a laser confocal microscope is adopted to amplify the fiber cross section and continuously photograph the fiber cross section for multiple times, computer image analysis software is adopted to automatically identify and integrate the obtained whole bundle of fiber cross sections, overlapping areas among photos are removed, and the complete and accurate fiber cross section is obtained. Metallographic software is adopted to identify and mark the cellosilk, so that the rapid and accurate measurement of the cellosilk is realized.

The invention provides a modified engineering plastic melt index real-time monitoring method which comprises the following steps: determining a melt index difference value of adjacent monitoring points by acquiring a melt index value of each section of an extrusion production line; obtaining the number of shearing cycles of the extrusion production line, identifying the fiber shearing damage degree of each section according to the melt index difference and the number of shearing cycles to obtain fiber damage distribution, and determining the fiber fracture position according to the fiber damage distribution; the melt index difference value corresponding to the fiber fracture position is analyzed by obtaining the melt index of the fiber fracture position, and the monitoring point interval is dynamically adjusted through the melt index difference value; and obtaining the melt index value and the fiber shortening amplitude after the interval adjustment of the monitoring points, and comparing the melt index change and the fiber length loss of each monitoring point to obtain the corresponding distribution of the fiber shortening amplitude and the melt index value.

The utility model relates to the technical field of cloth testing, in particular to a tearing experiment device and experiment equipment for anti-tearing non-woven fabrics, the tearing experiment device comprises an operation table, a first pressing mechanism and a second pressing mechanism are arranged on the surface of the operation table, and the first pressing mechanism is connected to the surface of the operation table in a sliding mode. The first pressing mechanism and the second pressing mechanism are just connected through the connecting plate, so that cloth only needs to be flatly laid on the connecting plate when the cloth is placed, and due to the fact that the cloth is supported by the connecting plate, the cloth can be conveniently leveled firstly and then fixed through the first pressing mechanism and the second pressing mechanism, and the cloth can be conveniently placed. Then a first air cylinder is used for driving a first pressing mechanism to move in the direction away from a second pressing mechanism, in the process, an infrared distance meter can be used for measuring the moving distance, a pressure sensor is used for measuring the pulling force borne by the cloth, and whether fiber breakage and other situations happen to the whole cloth in the pulling process or not is judged through an observation mechanism; and data statistics and comparison are facilitated.