36results about How to "Won't become brittle" patented technology

The invention discloses anti-static, oil-proof, cold-proof and antiskid multifunctional safety shoes and belongs to the technical field of clothes production. A sole material is prepared from raw materials in parts by weight as follows: 30-50 parts of latex, 10-20 parts of ethyl butyrate, 5-8 parts of pottery clay, 5-8 parts of an accelerator, 3-8 parts of furfural resin, 1-2 parts of tailing powder, 3-8 parts of dibutyl ether, 1-2 parts of barium sulfate and 1-2 parts of sulfur; an upper material is prepared after canvas is coated with a cold-proof and oil-proof adhesive. The anti-static, oil-proof, cold-proof and antiskid multifunctional safety shoes adopt a brand-new formula, and the prepared safety shoes are comfortable to wear, have high anti-static capability and oil-proof capability, are not easily stained with dirt, cannot become brittle after being worn for a long time under the cold condition, are long in service life and are not easily stained with dirt due to the cold-proof and oil-proof adhesives covering the uppers.

The invention provides a preparation method of a reflective electromagnetic shielding film for FPC, comprising the following steps: first, preparing a coating of a first insulating coating layer, a second insulating coating layer and an electromagnetic wave reflecting coating; 2, coat; The first insulating coating layer is an abrasion-resistant coating, and the abrasion resistance is more than 1000 times; The second insulating coating layer is a coating with high filling and high toughness, and the bending resistance is more than 80000; The coating of electromagnetic wave reflective coating comprises a base resin and a metal filler, wherein the metal filler is sheet silver-coated glass or sheet silver-coated copper powder or leaf silver-coated copper powder or dendritic silver-coated copper powder; The carrier membrane is matte photoionization membrane. The metal filler has a size of 1 to 2 [mi]m in the thickness direction, a planar size of 3 to 9 [mu]m, and 3 to 5 bifurcations on theleaf-shaped metal filler; the ratio of the matrix resin to the metal filler of the electromagnetic wave reflective coating is 1:1.5 to 1 :5 The invention has better flexibility, bending resistance, product flatness and shielding effect.

The invention discloses a large forged high-speed steel cold roll and a manufacturing method thereof. The cold roll comprises the following chemical constituents in percentage by mass: 0.90-1.20% of C, 0.20-1.20% of Si, 0.20-1.00% of Mn, 6.00-12.00% of Cr, 2.00-5.00% of Mo, 1.00-4.00% of V, 0.80-2.00% of W, not greater than 0.80% of Ni, not greater than 0.02% of P, not greater than 0.02% of S, and the balance of Fe and inevitable impurities. The manufacturing method for the cold roll comprises the process steps of steel ingot refining, billet forging, pre-heat treatment, machining, final heat treatment and the like. The surface layer hardness of a roll body of the cold roll manufactured by the manufacturing method disclosed by the invention is 88-98 HSD; the cold roll is excellent in wear resistance, high in roughness holding capacity and high in structure stability. According to the manufacturing process disclosed by the invention, chroming process steps are reduced and production cost is decreased.

The invention provides a novel FPC composite electromagnetic shielding film and a preparation method thereof. The method comprises the following steps: 1) preparing coating materials of a first insulation paint layer, a second insulation paint layer, an electromagnetic wave reflection coating layer and an electromagnetic wave absorbing coating layer; and 2) carrying out coating, wherein the firstinsulation paint layer is a wear-resisting coating, wear resistance being larger than 1000 times; the second insulation paint layer is a high-filling and high-toughness coating, bending resistance times being larger than 80000; the coating material of the electromagnetic wave reflection coating layer comprises reflection layer matrix resin and metal fillers, the metal fillers being flake silver-clad glass or flake silver-clad copper powders or leaf-like silver-clad copper powders or dendritic silver-clad copper powders; the ratio of the matrix resin and the metal fillers of the electromagneticwave reflection coating layer is 1:1.5-1:5; the electromagnetic wave absorbing coating layer comprises absorbing layer matrix resin and wave absorbing materials; the carrier film is a matte release film. The novel FPC composite electromagnetic shielding film has better flexibility, bending resistance, product flatness and shielding effect.

The invention discloses a hot roll for rolling a titanium plate, and a manufacturing method of the hot roll. The hot roll comprises the following chemical constituents in percentage by weight: 0.30-0.50% of C, 0.60-2.00% of Si, 0.20-1.00% of Mn, 4.50-6.00% of Cr, 0.05-0.65% of Ni, 1.00-2.00% of Mo, 0.50-1.50% of V, less than or equal to 0.025% of P, less than or equal to 0.020% of S, and the balance of Fe and unavoidable impurities. The manufacturing method of the hot roll for rolling the titanium plate comprises the processing steps of steel ingot refining, roll blank forging, thermal refining, induction quenching treatment, tempering treatment and the like. Compared with the traditional hot roll made of a Cr3 material, the hot roll is good in abrasive resistance, corrosion resistance and thermal crack resistance, and the service life of the hot roll can be prolonged by above 70%.

The invention discloses a cold roll for rolling a lithium battery guard plate and a manufacturing method thereof. The cold roll contains the following chemical components in percentage by mass: 0.7-1.0% of C, 0.2-1.0% of Si, 0.2-0.6% of Mn, no more than 0.02% of P, no more than 0.02% of S, 2.0-4.0% of Cr, 0.2-0.6% of Ni, 0.2-0.8% of Mo, 0.1-0.5% of V and the balance of Fe and inevitable impurities. The manufacturing method of the cold roll comprises the processing steps of electroslag steel ingot fusion casting, roll blank forging, quenching and tempering treatment, induction hardening treatment, cold treatment, final heat treatment, machining and the like. The cold roll disclosed by the invention has high hardness and wear resistance; and under the service condition of the same strength, the service life of the cold roll is prolonged by 45-55% in comparison with the service life of the original common chrome steel cold roll, and the roll body case hardness of the cold roll can be up to 97-105 HSD.