32results about How to "Improve thermoforming performance" patented technology

The invention provides 2.5D protective film and a preparation method thereof. The 2.5D protective film is of a multi-layer structure, and comprises a PET substrate layer, a first organosilicon pressure-sensitive adhesive protective layer, a polyacrylic resin hardened layer, a first special optical-grade PET substrate layer, an OCA optical polyacrylic adhesive layer, a second special optical-gradePET substrate layer, a second organosilicon pressure-sensitive adhesive protective layer and a PET fluorine release film layer which are adhered sequentially. The 2.5D protective film has high light transmittance, low haze and good hot press formability, and the problems of corner shelling and edge graying which are easily caused by a PC surface which is unresistant to solvents and has poor adhesion after the PC surface is adhered to a mobile phone screen are solved; the hardened layer has high wear resistance, high hardness, AF anti-fingerprint performance and AG smoothness; and organosiliconpressure-sensitive adhesive has the advantages of moderate viscosity, firm adhesion to a glass cover plate of a mobile phone and excellent gas exhausting properties; through the 2.5D protective film,perfect combination of usability and high performance is achieved.

The invention relates to the technical field of aluminum alloys, in particular to an aluminum alloy with high strength, high conductivity, corrosion resistance, weldability and good thermal forming property and a preparation method and application thereof to manufacturing of a magnetic levitation induction plate. The aluminum alloy is prepared from, by mass, 0.1-0.6% of Si, 0.-0.7% of Fe, 0.1-0.5%of Cu, 0.01-0.15% of B, Mn<=0.1%, Mg<=0.01%, Cr<=0.1%, Zn<=0.1%, Ti<=0.1 and 0.001-0.005%of C, wherein the single impurity is less than or equal to 0.05%, the alloy impurity is less than or equal to0.12%, and the balance is AI. The preparation method comprises the steps of fusion casting treatment, homogenization treatment, extrusion treatment, cold deformation treatment and stabilization treatment. Through interaction and coordination of elements, the alloy has high strength, high conductivity, corrosion resistance, weldability and good thermal forming performance.

The invention provides unleaded brass alloy. The unleaded brass alloy contains 59.0%-65.0% wt% of Cu, 0.1%-1.0% wt% of Si, and the balance Zn and unavoidable impurities, and the Zn equivalent X of the unleaded brass alloy is within the range of 38%-43.5%. The following formula X=(Znwt%+10.0xSiwt%+2.0xSnwt%+6.0xAlwt%)/(Cuwt%+Znwt%+10.0xSiwt%+2.0xSnwt%+6.0xAlwt %) represents the Zn equivalent X. The unleaded brass alloy has good formability and polishing performance, and is suitable for parts, of bathroom plumbing, electric products, automobiles and the like, formed by casting and forging, in particular for water faucets and other products with complex structures.

The invention provides a technology for increasing the pre-pressing strength of a formaldehyde-free artificial board by using a hot melt adhesive. The technology is characterized by comprising the steps that 1, crop stalks are smashed into the fineness of 10-60 mesh, polymer MDI glue accounting for 2-8% of the weight of the crop stalks is added for stirring and mixing, and a stirred mixture is obtained; 2, before the stirred mixture is laid, a layer of sanding powder is laid, then a layer of hot melt adhesive film is laid on the sanding powder, and the stirred mixture is laid on the hot melt adhesive film so as to be used as a plate blank; 3, the plate bland is subjected compression rolling by using a continuous pre-pressing machine under the condition of 250-500 kN/m<2>, a layer of hot melt adhesive film is laid on the upper surface of the plate blank obtained after pre-pressing forming, and then a layer of sanding powder is laid on the hot melt adhesive film on the upper layer; 4, the plate blank is fed into a hot pressing machine, under the conditions that the hot press temperature is 150-220 DEG C, and the pressure is 2400-3800 kN/m<2>, a rough board is formed through hot pressing and solidification, and the artificial board is obtained through aftertreatment.

The invention discloses a hot-pressing device for plastic processing, and particularly relates to the field of plastic processing. The hot-pressing device comprises a workbench, wherein a control box is fixedly arranged on one side of the top of the workbench, a mold base is fixedly arranged at the top of the workbench, a hot-pressing mold is fixedly arranged at the top of the mold base, racks are fixedly arranged on the left side and the right side of the top of the workbench, gas recovery mechanisms are fixedly arranged on the left side and the right side of the racks, and a portal frame is fixedly connected to one side of the racks. According to the scheme, the gas recovery mechanisms are arranged inside the hot-pressing device so as to recover pungent smell generated when an internal hot-pressing plate is used for carrying out hot-pressing work on plastic, pollution-free recovery and emission of gas are realized through the cooperation between a suction fan and a gas treatment box, the suction fan can be used for rapidly sucking the gas inside the device, the sucked gas is fed into the gas treatment box on one side for treatment through an air supply pipeline on one side, and pollution-free emission is realized.

Disclosed are: a propylene resin composition for a stretched sheet having excellent stiffness, heat resistant stiffness, transparency, uniform stretchability and thermal moldability; and a stretched sheet and a thermally molded article, each of which comprises the resin composition. The propylene resin composition for a stretched sheet comprises 10 to 90 wt% of a high-melting-point propylene resin (A') having a melting point of 156 to 170 DEG C as measured by DSC and 10 to 90 wt% of at least one low-melting-point propylene resin (A'') having a melting point of 70 to 155 DEG C as measured by DSC (provided that the total amount of the components (A') and (A'') is defined as 100 wt%), and fulfils the following requirements [1] to [4]: [1] the propylene resin composition has a melt flow rate (230 DEG C, 2.16 kg load) of 0.5 to 10.0 g/10 min; [2] the propylene resin composition has a melting point of 150 to 170 DEG C as measured by DSC; [3] the propylene resin composition (A) contains an a-olefin comonomer at a content of 1 to 11 mol%; and [4] the propylene resin composition contains a nucleating agent.

The invention relates to the technical field of aluminum alloys, in particular to an aluminum alloy with high conductivity uniformity and a preparation method and application thereof. The aluminum alloy comprises the following components: Si, Fe, Cu, Mn, Mg, Cr, Zn, Ni, Ti, Sn, Sb, Pb, Bi, Ga, V, Zr, C, B, less than or equal to 0.05 wt% of a single impurity, less than or equal to 0.12 wt% of an alloy impurity, and the balance Al. The preparation method comprises the steps of casting, homogenizing, extruding, cold deformation, quenching, stretching and stabilizing treatment. the aluminum alloy can be used for preparing a sensor shell. The aluminum alloy produced through the preparation method has the advantages of being high in strength, narrow in conductivity value range, good in machining formability, good in size consistency, high in size precision and the like, no residual deformation stress exists after high-speed multi-tool simultaneous machining, drilling aluminum scraps are evenly broken, turning spiral aluminum scraps are not wound, and the aluminum alloy can be used as a sensor shell, and can effectively guarantee the accuracy of exploration data transmission.

The invention relates to the technical field of materials, and discloses superplastic forming nanocrystalline antibacterial martensitic stainless steel and a preparation method thereof. The superplastic forming nanocrystalline antibacterial martensitic stainless steel is characterized by being prepared from the following chemical components in percentage, by weight, 0.16 to 0.32 of C; 12.8 to 14.4 of Cr; 1.4 to 3.0 of Cu; 1.2 to 2.8 of W; 0.04 to 0.20 of V; 0.01 to 0.03 of La; Mn is less than 0.15; N is less than 0.03; and the balance Fe. The preparation method of the stainless steel comprises the following steps of (1) preserving heat at 980-1060 DEG C for a period of time, and then quickly cooling to room temperature; (2) carrying out thermal deformation within the temperature of 820-900 DEG C and the strain rate of 0.1-1s <-1 >, and converting the nanolath precursor into an equiaxial nanocrystal structure, wherein the total strain capacity is greater than or equal to 70%; (3) carrying out superplastic forming under the conditions that the temperature is 760-840 DEG C and the strain rate of 0.001-0.02 s <-1 >; and (4) aging the material subjected to superplastic forming at the temperature of 460-500 DEG C for 3-5 hours. The prepared superplastic forming nanocrystalline antibacterial martensitic stainless steel has excellent hot working performance, corrosion resistance, antibacterial performance and comprehensive mechanical performance, and can be widely applied to medical instruments in the cutting fields of knives, scissors and the like.

The invention discloses production equipment for one-way carbon fiber prepreg cloth and a preparation method thereof. The production equipment comprises a production equipment main body and a cross beam, wherein a positioning connecting seat is mounted at the rear end of the cross beam; a first supporting frame and a second supporting frame are mounted at the upper end of the positioning connecting seat; a first composite roller is mounted on the inner side of the first supporting frame; a second composite roller is mounted on the inner side of the second supporting frame; and a first movable clamping seat and a second movable clamping seat are mounted on the outer side of the production equipment main body. According to the production equipment for the one-way carbon fiber prepreg cloth and the preparation method thereof, a double-roller-way composite mechanism with a tensioning structure, a waxing and coating mechanism and a discharging and rolling mechanism are arranged, so that composite forming operation can be conveniently and better carried out, a good hot-press forming effect is achieved, the condition of loosening is not easy to occur, the production effect of the cloth is improved, coating operation is facilitated, discharging operation can be conveniently and better carried out, discharging is simpler, and carrying is convenient.

The invention provides a process of using a polyurethane tackifier to improve prepressing strength of a formaldehyde-free artificial board. The process includes following steps: step 1, smashing cropstalk to be 20-50 meshes in fineness, adding polymerization MDI glue accounting for 2-8% of weight of the crop stalk and the polyurethane tackifier accounting for 1-5% of the weight of the crop stalk,stirring and mixing, and paving to form a board blank; step 2, adopting a continuous prepress to press-roll the board blank at pressure of 250-500kN/m2; step 3, feeding the board blank into a hot press for hot-press curing at hot pressing temperature of 150-220 DEG C and at pressure of 2400-3800kN/m2 to form a rough board, and performing aftertreatment on the rough board to obtain the artificialboard.

The invention belongs to the technical field of packaging materials, and particularly relates to a PE colorful heat-shrinkable film and a preparation method thereof. The PE colorful heat-shrinkable film comprises low-density polyethylene, metallocene polyethylene, high-density polyethylene, colorful synthetic polyethylene, an antioxidant, a heat stabilizer, an ultraviolet blocking agent and an anti-blocking agent. According to the heat-shrinkable film provided by the invention, the anti-blocking agent is used, so a packaging bag prepared from the heat-shrinkable film is not prone to adhesion and has good opening ability; and the high-density polyethylene and low-density polyethylene with a low melt index are added the low-density polyethylene for modification, so the obtained heat-shrinkable film is good in transparency and surface gloss, and greatly improved in mechanical properties.