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What are plastic wiring equipment and what products do they mean?
- . 1. Rubber injection molding: rubber injection molding is a method of injecting rubber directly from the barrel into a model. The advantages are: rubber injection molding is intermittent operation, but the molding cycle is short, high production efficiency cancelled blank preparation process, low labor intensity, excellent product quality. 2, plastic injection: plastic injection molding is a plastic products, the molten plastic will use pressure injection into the plastic mold, cooling molding, want to get all kinds of plastic parts. A mechanical injection molding machine is specially designed for injection molding. The most commonly used plastic at present is polystyrene. 3, high impact, high heat resistance, flame retardant, enhanced, transparent and so on. 4, liquidity is a little worse than HIPS, better than PMMA, PC and so on, good flexibility. Using polystyrene standard, THF (tetrahydrofuran) as mobile phase (note that your column should be used for THF), differential refractive index detector, universal calibration method was used to determine the molecular weight of PVC and its distribution. Most literature gives K and alpha values of polymers at 25 degrees C, and there is no reliable K and alpha values for polystyrene and polyvinyl chloride at 28 C in the present literature. If you do not have to determine the molecular weight of PVC at 28 DEG C, can be determined by 25 degrees, while the PS and PVC K, a as follows: PS:K = 0.016, a = 0.706, PCV:K = 0.0163, a = 0.766
(PVC tile UPVC lightweight roofing tile) is a kind of new roofing materials.s
How can medical plastic film be changed into hydrophilic material?
- The surface of the hydrophilic material is spread and can act by capillary action, and the water is sucked into the material from the water. The hydrophobic surface of the water can only be spread and the water penetrates into the capillary of the materialMaterials such as building materials, hydrophilic materials, cement, concrete, sand, stone, brick, wood and other materials, asphalt, paraffin wax and some plastic hydrophobic materialsHydrophilic materials are used more in bonding designs to make buildings more stable; hydrophobic materials are used as moisture-proof, waterproof and antiseptic materials, and hydrophilic materials are treated by surface treatment to reduce their water absorptions
Standard for medical high density polyethylene bags
- Take this amount of goods, in each bottle filled with proper amount of glass ball, when the bottle (bottle, with screw cap with force wrench bottle and cap screwing torque, see Table 1), placed in the container with a suction device, water immersion, vacuum and vacuum degree of 27kPa, maintained for 2 minutes. The bottle may not have water or bubble phenomenon.s
Why can plastic bottles be recycled and plastic bags can not be recycled?
- The recycling efficiency of plastic bags is not high, a bag is not heavy, and the recycling price is very low! Plastic bottle is mainly PET material, the price is much more expensive, and a bottle of weight is a lot of bag weight, recycling value is greater!s
Size of bubble pot
- Specifications from 0.25L--220LOpen and close plastic bucket and 1000L plastic barrel. Can be used for articles to hold or transport turnover. The maximum capacity of plastic bucket capacity current rotational molding production can reach 50 tons.Some products can be used for hot filling, and the general temperature should be no more than 60 degrees centigrade. Hot filling, etc. should be contained objects and the full cooling down to room temperature in order to shut the lid and stacking. Weather resistance zero above 60 degrees - 40 degrees below zero, good performance.s
What are the parts of plastics? What are their respective characteristics?
- The so-called plastic, in fact, it is a kind of synthetic resin, the shape of the natural resin with pine resin similar to, through chemical means of artificial synthesis, and is called plastic.s
How is the radiation resistance of medical PP better than that of medical polyethylene?
- PE plastic (polyethylene)English name, plasticized and extruded by three layers, but three layer co extrusion core layer foamingPolyethylene, PVC, polystyrene, polypropylene what is the difference between polyethylene PE?When not painted, milky white, translucent, should not contact with organic solvents, leaving traces. PMMA has the unique properties of other plastics, such as sawdust or shredded paper.s
What kind of plastic is used for environmental protection materials?
- The utility model has the advantages of convenient storage and transportation, as long as the utility model has the advantages of dry drying, no need of avoiding light and wide application range, and not only can be used for agricultural film and packaging bags, but also can be widely used in the medical field. With the development of modern biological technology, biodegradable plastics have been paid more and more attention and become a new hot spot of research and development.s
what is silicone rubber
- Silicone rubber (SiliconeRubber) is a molecular bond properties of both inorganic and organic polymer elastic material, the primary key elements of its silicon atoms and oxygen ato...
How to keep water pipes from freezing
- If you don’t want to pay too much money for having your frozen water pipes fixed and be greatly inconvenienced, then follow the steps below to keep your water pipes in tip top sh...
What is a rubber tree
- Rubber trees, deciduous trees, have milky sap. It requires average annual rainfall of 1150 to 2500 mm, but rubber trees should not be planted in areas of low humidity. Suitable for...
Frozen pipes what to do
- If the supply line of pipes are frozen, you can flush the toilet once and use the water already stored inside the tank. The frozen pipe prevents fresh water from flowing into the t...
What is a fertilizer
- Ecycling of nitrogen from dead to living plants is often the only source of nitrogen in the soil.Fertilizer is the kind of material to help the plant grow.The essential plant nutri...