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36results about How to "Solve the problem of easy peeling" patented technology

Preparation method of porous stainless steel film

The invention discloses a preparation method of a porous stainless steel film. The preparation method comprises the following steps: firstly, carrying out compression molding on large-grain-size stainless steel powder coated with a low-melting-point metal layer on the surface through a powder compressing machine; secondly, preparing a stainless steel powder film layer on a molded blank body; and finally, sintering to obtain the highly-asymmetrical porous stainless steel film. According to the preparation method provided by the invention, the stainless steel powder surface of the base body for preparation is coated with the low-melting-point metal layer so as to reduce the sintering temperature of stainless steel powder of the base body. Therefore, the base body and the film layer are sintered together; the asymmetrical degree of the prepared porous stainless steel film material is high; the pore diameter distribution of the film layer is narrow; the film layer and the base body are firmly combined; the low-melting-point metal on the surface of the base body powder and the base body powder are alloyed by high temperature sintering; meanwhile, the mechanical intensity of the film material is ensured, and the other metal properties of the porous stainless steel film are improved.
Owner:NANJING UNIV OF TECH

Laser shock strengthening method for small-pitch gear surface

InactiveCN105936974AEasy to cleanFacilitate large-area overlapping laser shock treatmentFurnace typesHeat treatment furnacesShock treatmentsGear tooth
The invention relates to a laser surface shock strengthening technology, and in particular to a laser shock strengthening method for a small-pitch gear surface. The method can be expanded into surface strengthening of a small-pitch spline male die and a fine-pitch thread. The method is characterized in that clearances among teeth of a gear are filled with transparent fillers prepared by mixing materials in ratio, and the clearances are full of the transparent fillers in order to form a column body by the gear and the transparent fillers; then an aluminum foil is adhered to the column surface to be used as an energy absorbing layer; the gear surface can be subjected to large-area overlapping laser shock treatment under the condition that running water is used as a limiting layer. The method has the advantages that the clearances among the teeth of the gear are fully filled with the transparent fillers, and the tops of the teeth of the gear and the transparent fillers can form a smooth column surface, thus the large-area overlapping laser shock treatment can be conveniently carried out for the gear, and as a result, the laser shock strengthening effect can be greatly improved; and after the shock treatment, the transparent fillers in the clearances among the teeth of the gear can be easily removed, so that the demand of mass production can be met.
Owner:JIANGSU UNIV

Washable mask core fiber filter material and preparation method thereof

The invention discloses a washable mask core fiber filter material and a preparation method thereof. The preparation method comprises the following steps: a nanofiber compact layer and a nanofiber fluffy layer are prepared by respectively regulating and controlling solvent/moisture double diffusion speeds of different spinning solutions under the action of a high-voltage electrostatic field, and the nanofiber compact layer and the nanofiber fluffy layer are sequentially deposited on a receiving base material to obtain a composite layer; and after the composite layer is subjected to step-by-step heat treatment and dotted ultrasonic compounding by a sectional type high-temperature/ultrasonic compounding device, a functional group type cross-linking agent in the compact layer fiber forms an inner cross-linked network structure in the fiber, meanwhile, a haplotype cross-linking agent in the fluffy layer fiber forms a semi-interpenetrating cross-linked network in the fiber, then the fibers with the lower glass transition temperature are molten, heat bonding points are generated among the fibers, so that the fiber filter material with a multi-stage cross-linked structure is obtained in one step. The invention provides the preparation method of the washable mask core filter material which is not prone to peeling between layers and can be repeatedly used.
Owner:DONGHUA UNIV

Production technology of waterproof and heat-insulated integrated board

The invention discloses a production technology of a waterproof and heat-insulated integrated board. The production technology comprises the following steps of: firstly, compositing an enhanced isolating material at one side of a waterproof roll; pre-heating the waterproof roll composited with the enhanced isolating material by a pre-heating device; compositing an heat-insulated material at one side of the waterproof roll composited with the enhanced isolating material after pre-heating; and finally, covering another pre-heated waterproof roll on the surface of the heat-insulated material. By providing the enhanced isolating material at one side of the waterproof roll, not only can the bonding strength between the enhanced isolating material and the waterproof roll be enhanced, but also the waterproof roll and the heat-insulated material can be effectively isolated; the condition that the waterproof roll is contacted with the heat-insulated material for a long time to cause chemical reaction can be avoided; a plasticizer inside the roll is prevented from migrating; the quality of the product is ensured; a procedure of pre-heating the waterproof roll is added before the waterproof roll and the heat-insulated material are composited; and the phenomenon that a waterproof layer and an insulating layer are stripped after the board is molded can be avoided, and the performance and quality of the board are further improved.
Owner:SHENZHEN ZHUOBAO TECH

A production process of waterproof and thermal insulation integrated board

The invention discloses a production technology of a waterproof and heat-insulated integrated board. The production technology comprises the following steps of: firstly, compositing an enhanced isolating material at one side of a waterproof roll; pre-heating the waterproof roll composited with the enhanced isolating material by a pre-heating device; compositing an heat-insulated material at one side of the waterproof roll composited with the enhanced isolating material after pre-heating; and finally, covering another pre-heated waterproof roll on the surface of the heat-insulated material. By providing the enhanced isolating material at one side of the waterproof roll, not only can the bonding strength between the enhanced isolating material and the waterproof roll be enhanced, but also the waterproof roll and the heat-insulated material can be effectively isolated; the condition that the waterproof roll is contacted with the heat-insulated material for a long time to cause chemical reaction can be avoided; a plasticizer inside the roll is prevented from migrating; the quality of the product is ensured; a procedure of pre-heating the waterproof roll is added before the waterproof roll and the heat-insulated material are composited; and the phenomenon that a waterproof layer and an insulating layer are stripped after the board is molded can be avoided, and the performance and quality of the board are further improved.
Owner:SHENZHEN ZHUOBAO TECH

Method for preparing light composite artificial stone profile by using yellow phosphorus slags

The invention provides a method for preparing a light composite artificial stone profile by using yellow phosphorus slags, which comprises the following steps of: S1. preparing a pore base layer, uniformly mixing silica powder and limestone granules, uniformly arranging the silica powder and the limestone granules at the bottom of a base layer forming die, pouring the yellow phosphorus slags intothe base layer forming die, and carrying out heat preservation, cooling and cutting processes to obtain a pore base layerprofile;S2. preparing a surface layer and forming thelight composite artificialstone profile, mixing and stirring an adhesive, natural stone granules or powder materials and inorganic mineral pigments to obtain a mixture, placing the pore base layer profile at the bottom of anartificial stone forming die, injecting the mixture into the artificial stone forming die, and uniformly coatingon the surface of the pore base layer profilewith the mixture through a composite process to form the surface layer;finally, preparing the light composite artificial stone profile through the working procedures of curing, demoulding and polishing.The method for preparing the light composite artificial stone profile by using the yellow phosphorus slags has the beneficial effects that the specific gravity of the pore base layer profile is reduced, the content of residual free calcium oxide and magnesium oxide in the yellow phosphorus slags is reduced, and the yellow phosphorus slagsarechanged into valuable.
Owner:四川新磷环保技术有限公司

Wear-resistant and corrosion-resistant gradient coatings of middle trough of scraper conveyor

The invention relates to wear-resistant and corrosion-resistant gradient coatings of a middle trough of a scraper conveyor. The wear-resistant and corrosion-resistant gradient coatings can effectivelysolve the problems of uneven wear, serious corrosion and easy falling of coatings of an existing middle plate to a certain extent. According to the technical solution, the components of the coatingsare in gradient change, three parts are involved in total, the gradient coatings comprise the following components of, in percentage by weight, 43%-48% of Ni50, 47%-52% of Ni60, 1%-3% of TiC and 2%-4%of WC of a gradient coating-1, 38%-43% of Ni50, 42%-47% of Ni60, 6%-8% of TiC and 7%-9% of WC of a gradient coating-2, and 33%-38% of Ni50, 37%-42% of Ni60, 11%-13% of TiC and 12%-14% of WC of a gradient coating-3. According to the wear-resistant and corrosion-resistant gradient coatings of the middle trough of the scraper conveyor, the wear-resistant and corrosion-resistant gradient coatings have the characteristics of low water absorption rate, good toughness, light weight and the like, and have the main characteristics of wear resistance and corrosion resistance, meanwhile, by controllinggradient change of the components of the coatings, sudden change of structures and the performances among a base body and the coatings is avoided, the bonding condition among interfaces of the coatings are improved, the bearing capacity and the abrasion resistance of the coatings can be further improved, the overall service life of the middle trough can be effectively prolonged, and safe and efficient operation of the scraper conveyor is guaranteed.
Owner:UNIV OF JINAN

A color pre-coated sheet with high gloss

The invention discloses a high-gloss colored pre-coated plate, which comprises a hot-dip galvanized steel plate, a layer of protective primer is sprayed on the surface of the hot-dip galvanized steel plate, and a layer of wear-resistant bright topcoat is sprayed on the surface of the protective primer. In the present invention, a layer of primer layer is compounded on the cladding surface of the hot-dip galvanized steel sheet, and a porous primer layer is compounded on the surface of the primer layer, and the primer layer and the porous primer layer are formed on the surface of the hot-dip galvanized steel sheet. Form the protective primer layer; because the composite primer is mixed with paraffin wax, when the composite primer adheres to the surface of the base primer layer, the mixed paraffin wax melts at high temperature, and the occupied sites of the paraffin wax are vacated. The surface of the paint layer is covered with voids vacated by paraffin, which makes the surface of the primer layer rough, which is convenient to realize the combination with the topcoat when spraying the topcoat in the later stage, and prevents the peeling of the topcoat layer. The surface of the layer is coated with topcoat, which causes the problem that the topcoat layer is easy to peel off.
Owner:JIANGSU LIBA ENTERPRISE JOINT STOCK

Artificial leather for automotive trim and preparation method thereof

The invention discloses artificial leather for automotive trim and a preparation method thereof, belongs to the field of artificial leather manufacturing, and solves the problems that artificial leather for automotive trim in the prior art is poor in wear resistance and a coating is easy to fall off. The artificial leather is base-cloth-free artificial leather, the artificial leather sequentially comprises the PVC foaming layer, the resin layer and the surface treatment layer from bottom to top, the problem that the base cloth layer and the leather layer are easy to peel off is solved, the artificial leather sequentially comprises the PVC foaming layer, the resin layer and the surface treatment layer from bottom to top, the wear resistance of the artificial leather is improved, and the service life of the artificial leather is prolonged. However, due to the fact that the wear resistance needs to be improved, the film forming hardness of the PVC artificial leather is large, the problem that after the hardness of the artificial leather is increased, the buckling resistance is reduced at the low temperature is solved, the softness and comfort of the artificial leather are kept, and the experience feeling of the artificial leather applied to automobile interiors can be improved.
Owner:WUXI MANYOULI NEW COMPOSITE MATERIALS

Heat-proof and heat-insulation double-gradient functional composite material and preparation method thereof

The invention particularly relates to a heat-proof and heat-insulation double-gradient functional composite material and a preparation method thereof, and belongs to the technical field of heat-insulation materials, the composite material comprises a heat-insulation layer, a transition layer and a heat-proof layer, and the transition layer is arranged between the heat-insulation layer and the heat-proof layer; the heat insulation layer is prepared from the following raw materials: modified phenolic resin and quartz fiber felt; raw materials of the transition layer comprise mixed multifunctional resin and first quartz fiber cloth; the heat-proof layer is prepared from phenolic resin, ablation-resistant filler and second quartz fiber cloth; the base materials of the heat insulation layer, the transition layer and the heat protection layer are all selected from phenolic resin material systems with good ablation performance, good bonding performance and compatibility are achieved, obvious material interfaces can be eliminated, and the interface bonding effect is improved. And phenolic mixed resin is adopted as a transition layer between the heat-proof layer and the heat-insulating layer, so that the purpose of gradient gradual change of the material performance is achieved, and the problem that various layers of the existing heat protection material are easy to peel off is solved.
Owner:HUBEI SANJIANG AEROSPACE GRP HONGYANG ELECTROMECHANICAL

A kind of preparation method of porous stainless steel membrane

The invention discloses a preparation method of a porous stainless steel film. The preparation method comprises the following steps: firstly, carrying out compression molding on large-grain-size stainless steel powder coated with a low-melting-point metal layer on the surface through a powder compressing machine; secondly, preparing a stainless steel powder film layer on a molded blank body; and finally, sintering to obtain the highly-asymmetrical porous stainless steel film. According to the preparation method provided by the invention, the stainless steel powder surface of the base body for preparation is coated with the low-melting-point metal layer so as to reduce the sintering temperature of stainless steel powder of the base body. Therefore, the base body and the film layer are sintered together; the asymmetrical degree of the prepared porous stainless steel film material is high; the pore diameter distribution of the film layer is narrow; the film layer and the base body are firmly combined; the low-melting-point metal on the surface of the base body powder and the base body powder are alloyed by high temperature sintering; meanwhile, the mechanical intensity of the film material is ensured, and the other metal properties of the porous stainless steel film are improved.
Owner:NANJING TECH UNIV
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