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289results about How to "Evenly" patented technology

Flexible all-coating soft film and preparation method thereof

The invention relates to the technical field of protective films, and particularly relates to a flexible all-coating soft film and a preparation method thereof. The flexible all-coating soft film comprises a film protecting layer, a using layer and a stripping layer which are sequentially adhered from top to bottom; the protecting film layer comprises a base material layer and a film protecting glue layer which are sequentially adhered from top to bottom; the using layer comprises a self-repairing layer, a flexible soft film layer and a using glue layer which are sequentially adhered from topto bottom; the lower surface of the film protecting glue layer is adhered to the upper surface of the self-repairing layer; and the lower surface of the using layer is adhered to the upper surface ofthe stripping layer. The flexible all-coating soft film provided by the invention has smooth hand feeling and large stripping force, a curved screen can be all coated, relatively good resilience and self-repairing effect can be achieved, scratch marks can be repaired automatically, and the service life of the flexible all-coating soft film is prolonged. The preparation method provided by the invention is simple, the operation control is convenient, conventional production processes are simplified, the production efficiency is high, the production cost is low, the prepared product is high in yield and stable in quality, and the preparation method is suitable for large-scale industrial production.
Owner:NALI OPTICAL MATERIAL DONGGUAN

Wet spinning method of low-proportion high-spun flax macrofiber

The invention provides a wet spinning method of low-proportion high-spun flax macrofiber, which comprises the steps of: a first step, combing original flax fiber to obtain flax macrofiber; a third step, carrying out hemp proportioning on the flax macrofiber obtained after crystal transition modification in a former step, gilling, paralleling and spinning by a roving process to obtain flax roving; and a fifth step, carrying out wet spinning on the flax roving obtained after water blanching in a former step by a wet spinning frame to obtain the flax yarn. The wet spinning method is characterized in that a second step of carrying out crystal transition modification treatment on the flax macrofiber is performed between the first step and the third step, and a fourth step of carrying out water blanching on the flax roving is performed between the third step and the fifth step. The method has the advantages that the utilization ratio of the flax macrofiber is greatly improved and reaches more than 70%, and the material resources are saved; high-count linen yarn can be spun according to the fiber proportion of the traditional wet spinning method; and the water blanching replaces the scouring blanching in the traditional wet spinning method, so that the process is simplified, the energy sources are saved and the cost is lowered.
Owner:DONGHUA UNIV +1

Blended spinning method of long spinning and damp spinning for bast fibers

ActiveCN101418484ASmooth yarn bodyLess hairyYarnWear resistanceMaterials science
The invention provides a method integrated with long spinning, wet spinning and blended spinning for bast fibers. The method comprises the following steps: the bast fibers are scotched into flax; the flax is humidified and soaked for a period of time; the flax is carded into long flax; and the long flax is subjected to matching, silvering, drawing, roving, scouring, bleaching, spinning, drying and winding. The method is characterized in that after the bast fibers are bleached, the obtained rove of the bast fibers and rove or filaments of other fibers are blended on a spinning machine. With the method, blended fibers are not bleached and scoured together with the bast fibers, so the defect that the performance of blended yarn is affected due to the damage of bleaching and scouring agents to the blended fibers in the prior wet spinning and blended spinning is overcome, and the obtained blended yarn has the characteristics of bright and clean yarn body, less hairness, evenness and good wear resistance. In addition, the method can fully play a role in respective advantages of the bast fibers and the blended fibers, complement respective disadvantages of the bast fibers and the blended fibers, has simple process, is favorable for improving the quality of blended yarn of the bast fibers, and realizes the high count, high grade and diversification of varieties of the bast fibers.
Owner:DONGHUA UNIV

Preparation method of tin oxide fiber precursor and tin oxide crystal fibers

The invention relates to a preparation method of a tin oxide fiber precursor and tin oxide crystal fibers. The preparation method comprises the following steps: carrying out a replacement reaction on halides of tin and potassium (sodium) acetate to synthesize the tin oxide fiber precursor which takes acetic acid as a ligand; concentrating a precursor solution to obtain a spinning solution and carrying out centrifugal silk spinning to obtain tin oxide precursor fibers; and carrying out procedures of special atmosphere pre-treatment, high-temperature heat treatment and the like on the precursor fibers to obtain the tin oxide crystal fibers. According to the preparation method, the long-diameter ratio of the tin oxide crystal fibers is greater than 1000, the tensile strength of the fibers is 0.8GPa-1.1GPa, the whiteness of the fibers is good and the color and luster of the fibers are soft. The preparation method is simple in preparation process, moderate in condition and stable in quality of fibers in batches; spinning sol does not go bad after being placed for a long time. The tin oxide crystal fibers can be applied to the fields of photocatalysis, air sensitivity, humidity sensitivity and the like. The tin oxide fiber precursor can also be used for preparing oxide thin films, nano powder and nano wires or preparing tin-containing functional materials including nano tin oxide fibers and the like by an electrostatic spinning method.
Owner:SHANDONG UNIV

Method for preparing nano-pearl colored polyester fiber

The invention relates to a method for preparing nano-pearl colored polyester fiber, which comprises the following steps that: (1) pearls are sheared and ground to obtain crude pearl powder, then the crude pearl powder is mixed with water, a water dispersion of the pearl powder with a grain diameter of between 50 and 100 nm is obtained through high-pressure crushing, a thermal stabilizer, an antioxidant and an emulsifying agent are added into the water dispersion of the pearl powder, and the drying treatment is performed; (2) the obtained product is mixed evenly with a compatilizer at normal temperature, then the mixture is added into polyester chips, and granulation is performed on the mixture by a double screw extruder; and (3) nano-pearl polyester chips, the polyester chips and color master batch are blended for spinning. The method can be finished on the prior spinning equipment, tows are even and have evenly distributed color and luster; fabric is smooth, and has the characteristic of soft luster; the method is widely applied in the fields of apparel, decoration and industry; and at the same time, the blended color master batch can be used for preparing fibers with various lusters, and the prepared fibers have good nutrition and health care effects on human bodies.
Owner:ZHEJIANG JINXIA NEW MATERIAL TECH CO LTD

Method and device for preparing polyacrylonitrile pre-oxidation nanofiber yarns through electrostatic spinning

The invention relates to a method and a device for preparing polyacrylonitrile pre-oxidation nanofiber yarns through electrostatic spinning. Two spinning jets of the device are respectively connected with a positive electrode and a negative electrode of a high-voltage electrostatic generator; a metal round target is connected with an insulation rod of which one end is connected with a motor; a hollow metal rod is fixed and is provided with a tip; and except for the tip, the rest part of the hollow metal rod is sprayed with insulation paint. The method comprises the following steps: (1) preparing polyacrylonitrile spinning solution; (2) performing electrostatic spinning by adopting an electrostatic spinning device, forming oriented nanofiber bundles by jet flow sprayed from the two spinning jets, and molding through twisting and winding to obtain polyacrylonitrile nanofiber yarns; and (3) carrying out pre-oxidation heat setting on the polyacrylonitrile nanofiber yarns to obtain the polyacrylonitrile pre-oxidation nanofiber yarns. The method is simple to operate. The polyacrylonitrile nanofiber yarns obtained by adopting the device to carry out eletrostatic spinning have the advantage of evenness, and the device is expected to be widely applied in the carbon fiber manufacturing field.
Owner:DONGHUA UNIV

Production method of flax blended knitting yarns

InactiveCN101935902AImprove qualityClear and plump appearanceYarnFiberYarn
The invention discloses a production method of flax blended knitting yarns. In the method, flax and modal fibers are blended according to a ratio of 15:85 to 85:15. The method comprises a spinning process and a rotor spinning process. The modal fibers selected in the invention are the most ideal material for light and thin knitted fabrics for their sweat-absorbing, thermal-insulation and cooling properties and integration of the comfortableness of cotton, the drapability of adhesive, the strength of terylene and the handfeel of real silk. The flax-modal blended knitting yarns exploit development space for high-quality flax light and thin knitted fabrics. Although the flax and modal fibers are susceptible to generating hairiness, the rotor spinning used in the invention is one-step bobbin forming and therefore reduces the hairiness of finished fibers and ensures the knitted fabrics are clear and full in appearance. The rotor spun yarns also have the advantages of few yarn faults, high elasticity, pilling resistance, wear resistance and the like. The method has the advantages that: the process flow is short; the cost is low; high grade flax knitting yarns with high balance of various performance indexes such as high fineness, little hairiness, yarn levelness and soft handfeel; and the application value in textile processing field is high.
Owner:QIQIHAR UNIVERSITY

High-speed spinning method of polylactic acid fiber

Disclosed is a high-speed spinning method of polylactic acid fiber. The method includes steps of introducing polylactic acid high polymer particle in a screw extruder to melt and extrude; after being filtered, introducing a metering pump; after metering, introducing to a spinning box to spin; stretching strands through an annular blowing air-cooling device and an oiling device orderly; introducing to a silk holding barrel after being delivered and cut off by a feeding device, and obtaining the polylactic acid fiber. The high-speed spinning method of the polylactic acid fiber is characterized in that the annular blowing air-cooling device includes a cooling cylinder in which an inner guide flow sleeve is provided; a surface cooler, which is arranged between the cooling cylinder and the inner guide flow sleeve; the oil feeding device includes an oil disk on which an upper oil wheel is provided; an oil disk supply pipe of which oil outlet is stretched to an oil disk cavity; a self-circulation adjusting mechanism of the oil disk agent is connected with the oil disk bottom plate; the feeding device comprises a column body, and the middle thereof is provided with a strand absorbing hole, a strand transition cavity and a strand center guide hole; one side of the column body is provided with a lifting groove; a gas cavity sealing ring, which is fixed with the column body; a lifting groove opening and closing cover, which is arranged on the column body. The high-speed spinning method can meet the rapid cooling of melt strands and oil application of high-speed spinning, and ensure the spinning quality.
Owner:CHANGSHU GOLD SPRING CHEM FIBERS & KNITTINGS
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