funnel The funnel is a cylindrical object that is used to inject liquid and young powder into a smaller container. The smaller tubular portions of the funnel can have different lengths. The funnel is usually made of stainless steel or plastic, but the paper funnel is sometimes used for substances that are difficult to clean thoroughly, such as engine oil. Some funnels have controllable shutters at the nose that allow the user to control the rate of fluid inflow. Funnels are common in kitchens; funnels are also found in laboratories, and filter papers are sometimes used to filter out chemicals such as crystals. Common classification There are many types of funnels, such as common funnels, hot water funnels, high pressure funnels, separatory funnels, and safety funnels. According to the size of the caliber and the length of the diameter, it can be divided into different models. A 6cm short neck funnel is generally used in elementary school nature teaching. Basic use The funnel is an indispensable instrument in filtration experiments. When filtering, filter paper is loaded into the funnel. There are many kinds of filter papers. Different filter papers can be selected according to the different requirements of filtration. Ordinary filter paper can be used for natural teaching. Filter paper of corresponding size should be purchased according to the size of the funnel. Instructions 1. The filter paper was folded in half, two times in succession, and folded into a 90° central angle shape. 2. Put the stacked filter paper into three layers on one side and open on the other side to form a funnel. 3. Put the funnel-shaped filter paper into the funnel, the filter paper edge is lower than the funnel edge, pour some water into the funnel mouth, so that the wet filter paper is placed against the inner wall of the funnel, and then the remaining water is poured off and used. 4. The installed filter funnel placed in a funnel with a filter holder, (such as a ring of iron stand), the funnel neck receiving filtrate decentralized beaker or test tube, the neck and the funnel tip against the wall of the receiving container, To prevent liquid splashing. 5. When injecting the liquid to be filtered into the funnel, hold the liquid beaker on the right and hold the glass rod on the left. The lower end of the glass rod is close to the lower side of the three layers of the funnel, so that the cup mouth is close to the glass rod, and the liquid to be filtered flows out along the mouth of the cup. The slope of the glass rod is inclined to flow into the funnel and flow to the liquid in the funnel. The liquid level cannot exceed the height of the filter paper in the funnel. 6. When the liquid passes through the filter paper and flows down the neck of the funnel, check to see if the liquid flows down the wall of the cup and feed it to the bottom of the cup. Otherwise, the beaker or the rotating funnel should be moved so that the tip of the funnel sticks to the wall of the beaker, allowing the liquid to flow down the wall.
Bakelite sheet or Electricity board, is also called plastic board, phenolic laminated cardboard, is to use quality bleached wood product paper and cotton wool as reinforcing material, with high purity, total synthesis reaction of petrochemical raw materials of phenolic resin as a resin adhesive made of wood.
Features:
At normal temperature, the electrical performance is good, the mechanical processing performance is good, the proportion is 1.45, the warp degree is less than 3 ‰, with good electrical, mechanical and machining properties.
The paper board is the most common laminate and the most widely used industrial laminate in the world.
Main features: good mechanical strength, anti-static, intermediate electrical insulation, is made of bakelite impregnated paper with phenolic resin, baked and hot pressed.
This product is suitable for mechanical and electrical equipment, which can be used in transformer oil.
Good mechanical strength, suitable for PCB drilling with gasket, distribution box, fixture board, die plywood, high and low pressure distribution box, packaging machine, comb, etc.
Applicable to motor, mechanical mould, PCB and ICT tools.
Molding machine, drilling machine, mesa grinding pad [1] board.
Application area of imported wood board: applicable to PCB drilling, silicon rubber mould.
Tools, switchboard, electrical machinery parts.
I. Define and purpose
Specification: The thickness of Bakelite Sheet material can be produced from 3mm to 50mm,the usual specification of 3-50mm is 1000mm* 2000mm, Bakelite Sheet can also be customized according to requirements, and the width can exceed 1220mm, and the length is not limited
Color: Black,red, can also be made another color, and the color order is 500KG.
Modified varieties: Bakelite Sheet can be added to the fiberglass, copper powder and molybdenum disulphide to enhance the bar.
Add antistatic agent to the permanent antistatic electric bar, and the volume resistance value is between 6 to 9 power of 10.
Add flame retardant to flame retardant rod from UL 94V-0 to HB flame retardant grade. Other modification requirements are customized according to customer's actual use.
Product certification: Bakelite Sheet most environmental certification reports and safety reports for raw materials, such as SGS report, CTI report, UL report, MSDS safety information, etc.
Bakelite Sheet,ESD Bakelite Plastic Sheet,Bakelite Plastic Sheet Dongguan Noegem Plastic Products Co.,Ltd , https://www.noegempLastic.com
Bakelite sheet is a hard, dense material made by applying heat and pressure to layers of paper or glass cloth impregnated with phenolic resin. These layers of laminations are usually of cellulose paper, cotton fabrics, synthetic yarn fabrics, glass fabrics or unwoven fabrics. When heat and pressure are applied to the layers, a chemical reaction (polymerization) transforms the layers into a high-pressure thermosetting industrial laminated plastic.
II. Technical requirement for surface
The surface shall tidy and smooth, bubble, impurity are not allowed. But slight scratch and color punctum are allowed. Edge is to be cut smooth. The delamination and crackle on the end surface are not allowed. The surface shall tidy and smooth, bubble, impurity are not allowed. But slight scratch and color punctum are allowed. Edge is to be cut smooth. The delamination and crackle on the end surface are not allowed .
III. Characteristics
♦ High mechanical properties, and oil resistance and certain dielectric property.
♦ Thermal rating is 120, and temperature resistance :130 centidegrees
VI. Application
Chemical machine parts , general machine parts and gear ,and generators, Pads, base, baffle etc.. Generator ,transformer, fixture, inverter, motor and electric insulation component.