41results about How to "Not easy to embrittle" patented technology

The invention provides a die of a phenolic piston and a manufacture method of the phenolic piston, and belongs to the technical field of dies, which solves the problem of poor quality of the existing phenolic piston finished product. The die of the phenolic piston comprises an upper die body and a lower die body, wherein a plurality of heating holes are formed in the upper die body and the lower die body, and are used for directly carrying out electric heating. The upper die body and the lower die body are respectively provided with a material stripping piece, so the phenolic piston is prevented from being adhered on the die, and the stripping stability is high. The manufacture method comprises the following steps of punching cakes, heating the die, closing the die and baking, wherein the upper die body and the lower die body are directly heated, after a blank of the phenolic piston is formed, and temperature is maintained by baking, so the internal performance of the phenolic piston is further improved, the strength is higher, and the phenolic piston is not easy to brittle.

The invention discloses a method for preparing a foamed ceramic insulation board by a waste glass ceramic wafer, belonging to the field of preparation technology of the foamed ceramic insulation board. The method comprises the steps of: washing the waste glass ceramic wafer with clear water, drying and grinding by ball milling to obtain waste glass ceramic powder with the fineness less than or equal to 100mu m; mixing the waste glass ceramic powder, pulverized fuel ash, furnace slag, coal gangue, ceramic tailings, foaming agent and modifying agent according to the mass ratio of (30-40):(10-15):(5-7):(10-18):(25-35):(1.8-2.2):(1.1-1.5); putting the mixture into a ball grinding mill, carrying out wet grinding and evenly mixing to form mixed slurry; drying by a pressure type spray granulation dryer and putting the dried product into a foaming refractory mould coated with aluminum oxide; heating to 1120-1150 DEG C in a heating furnace; and finally, annealing, cooling and cutting to obtain the foamed ceramic insulation board. The method is low in production cost and simple in technology, and can be used for continuously preparing the porous foamed ceramic insulation board with large size; and the product is good in performances.

The invention discloses a basalt fiber composite guy cable, which comprises a center composite rib, peripheral composite ribs, an inner protective sleeve, a filler and an outer protective sleeve, wherein the center composite rib is positioned in the center position; the peripheral composite ribs are wound on the center composite rib; the center composite rib and the peripheral composite ribs are wrapped in the inner protective sleeve; the filler is filled between the outer protective sleeve and the inner protective sleeve and is an elastic filler; the center composite rib is formed by compounding continuous basalt fiber and glass fiber through a resin matrix; the peripheral composite ribs are formed by compounding carbon fiber and aramid fiber through the resin matrix. The basalt fiber composite guy cable is high in strength, acid and alkaline corrosion resistant, and high in fatigue resistance, can be exposed and used in the open air for a long time, is long in service life and eliminates the potential safety hazard of fracture during use.

The invention relates to a novel modified PA66 (polyamide 66) material. The novel modified PA66 material comprises the following components in parts by weight: 50-80 parts of PA66, 20-30 parts of nano calcium carbonate, 0.2-0.3 part of liquid paraffin oil, 0.2-0.3 part of titanate coupler TC-114, 20-30 parts of toughening agent, 1-2 parts of crosslinking sensitizer, 0.5-1 part of crosslinking auxiliary, 0.5-0.8 part of main antioxidant, 0.3-0.5 part of auxiliary antioxidant and 1-2 parts of lubricating agent; and the preparation method of the novel modified PA66 material sequentially comprises a preparation process of active nano calcium carbonate, a preparation process of mixed material granules, a drying process, an injection moulding process and an irradiation modification process, wherein irradiation dose of an electron accelerator in the irradiation modification process is 5-8Mrad. The modified PA66 material prepared by the invention has stronger toughness and heat resistance, hardly tenders at low temperature and is lower in water absorption ratio and moulding shrinkage; besides, complete modification can also be realized when an irradiated material is thicker.

The invention discloses a pre-manufacturing method and a pre-manufactured structure for an LED package. The pre-manufactured structure of the LED package is manufactured mainly through the steps of stamping, coarsening, mold sealing, sticking, electroplating and the like. The pre-manufactured structure comprises a reflection cup rack, an insulation layer and a wire frame which are stuck together in sequence from the top down, wherein the reflection cup can resist high temperature generated by an LED in long-term operation, provides the superexcellent effects of heat conducting and extracting, and prolongs the service life of the LED; besides, the high-temperature-resist insulation layer ensures that the pre-manufactured structure can resist heat and is less susceptible to cracking and embrittling, thereby reducing the damage rate and use cost of the pre-manufactured structure of the LED package.

The invention provides a polyester resin composition including 97.0 mass% to 99.9 mass% of a polyester resin (A) and 0.1 mass % to 3.0 mass% of a polycarbodiimide (B), wherein dicarboxylic acid constituent units in the polyester resin (A) include terephthalic acid units and / or 2,6-napthalene dicarboxylic acid units, 5 mol% to 90 mol% of the diol constituent units in the polyester resin (A) are units derived from a diol having a cyclic acetal skeleton represented by formula (1) or formula (2), 0 mol% to 90 mol% of the diol constituent units being units derived from an alicyclic diol, and the polycarbodiimide (B) having two or more carbodiimide groups in each molecule thereof. (In formula (1), R1 and R2 each independently represent a C1-10 aliphatic group, a C3-10 alicyclic group, or a C6-10 aromatic group.) (In formula (2), R1 is the same as in formula (1), and R3 represents a C1-10 aliphatic group, a C3-10 alicyclic group, or a C6-10 aromatic group.).

The invention discloses a heating element, which belongs to range of heating components. The middle of the heating element is a plate core formed by covering high-temperature resistant heat-conduction insulating ceramic materials onto high-quality alloy wire heater; both side surface of the plate core are provided with a heating element skeleton which is composed of metal oxide, carbon materials and high-temperature resistant heat-conduction insulating inorganic binder, the outer side surface of the heating element skeleton is provided with stainless steel metal meshes in a clinging way, the outer side surface of the stainless steel metal meshes is provided with nano far-infrared material and high-temperature resistant moisture-proof covering. The advantages of the invention are as follows: the heater provided by the invention has small deformation, long the service life, hard brittleness, no power recession; the heat of the heating core plate not only can be fully discharged, but also can overcome the defect of degradation of electrical insulation performance during using due to moisture absorption when the electric heater is not used; the thermal efficiency can reach up to 99% or more, the radiation area is large, the radiation cooling is strong, and the comfort is good.