Plastics Industry

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tourist train - China Manufacturer

Thank you for inquiry my tourist train, TEL：86-371-69191685, E-MAIL：zzmodern@hotmail.com

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Natural polymer processing stage

This period to a natural polymer, is characterized by the modification and processing of the cellulose. 1869 Americans JW Hyatt cellulose nitrate, camphor and a small amount of alcohol can be made from a plastic material, under h eat and pressure molding plastic products, named celluloid. Newark, in the United States in 1872 to engage in the production. At that time, in addition to used as ivory substitutes, also processed into the carriage, and the car s windshield and movie film, began a tradition of the Plastics Industry, also developed molding technology.
1903 German A. Ai Xing Green invented a nonflammable cellulose acetate and injection molding method. Bayer AG, Germany, industrial production in 1905. In the meantime, some of the chemists in the laboratory synthesis of a variety of polymers, such as novolac resin, poly (methyl methacrylate), polyvinyl chloride and other laid the foundation for the later development of the plastics industry. 1904 World plastics production only 10kt, have not formed an independent industrial sector.shoot the chute

Synthetic resin phase

    This period based on synthe tic resin as the basic raw material for the production of plastic. 1909 Americans LH Baekeland in synthetic resins with phenol and formaldehyde, made the breakthrough, achieved a thermosetting resin â"€ â"€ phenolic resin patents. Phenolic resin, adding fillers, hot pressed molded products, laminates, coatings and adhesives. This is the first totally synthetic plastic. Universal phenolic resin production was established on 1910   factory. Before the 1940s, Bakelite is the most important varieties of plastic, accounts for about 2/3 of the production of plastic. Mainly used in electrical, instrumentation, machinery and automotive industries.

the claw has four claw

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pipe brackets - China Manufacturer

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 U-tube card installation steps are as follows: U-shaped claw, the claw has four claw; provide two U-shaped bayonet; provide a counterweight; provide four U-shaped bracket; said U type claw plastic material by injection molding; When assembled, the U-shaped bayonet bonded in the U-shaped pawl, the four U-shaped bracket are respectively fixed in the U-shaped claw four claws with, and said U-shape bracket close to the counterweight; use of the U-shaped claw clamping said U-shaped mount and said counterweight fast, and then by welding the U-shaped bayonet said counterweight is fixed. The device of the present invention are derived from a U-shaped claw tooling, simple processing, and low cost will not affect the production line with the fluctuations in the size of parts assembly, to better meet the requirements of welding assembly.

How to improve the binding capacity stainless steel electroless nickel deposits

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steel pipe fittings - China Manufacturer

Thank you for inquiry my steel pipe fittings, Tel:+86-577-85989898, Email:JD@CNJIEDE.CN

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Stainless steel parts (drive shaft, meshing, dynamic fitting) electroless nickel plating, to improve the uniformity of the coating and self-lubricating, than chromium electroplating. Stainless steel electroless nickel plating is often bad pretreatment coating and the substrate b inding force is not ideal, and the urgent need to address the problems in the actual production.

 Flash plated original process: mechanical polishing organic solvent degreasing → → the chemical degreasing → hot water washing → electrochemical degreasing → hot water washing → cold washing → 30% HCl → cold washing → 20% HCl (50 ℃) → cold washing → nickel → electroless nickel plating.stainless steel clamps

The shortcomings of the original process: Single HCL descaling ef fect is not good; complex shape pieces of flash bad coverage ability affect the uniformity of electroless nickel plating nickel plating; longer due process may cause stainless steel fresh surface re-oxidation into film; flash plating nickel electroless nickel plating solution and other solution is easily contaminated. To this end, it was to improve the process.

Improvement Process: polishing, degreasing processes with the original process → mixed acid activation (10% HCl +5% NH4F, 60 ℃) → hot water in addition to the film (25% HCl +8% HNO3 +10% HF) → cold washing → → Electroless nickel plating.stainless steel pipe fittings

Improvement of the advantages of the process:

â'  using a mixed acid to remove the stainless steel surface of insoluble FeCrO4 oxide film, Si, SiO2, so that the chemical activity enhancement of the surface of the substrate;

â'¡ The process can be simplified to avoid the stainless fresh surface and re-oxidation; â'¢ increase substrate preheating step, the elimination of the stress generated by the coating and the substrate due to temperature. Therefore, electroless plating nickel matrix binding force, the plating speed fast.steel pipe fittings

Stainless steel production process of using liquid ammonia

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stainless steel elbow - China Manufacturer

Thank you for inquiry my stainless steel elbow, Tel:+86-577-85989898, Email:JD@CNJIEDE.CN

http://www.steel-pipe-fittings.net/stainless-steel-elbow/

 In a stainless steel production process during the cold rolling after annealing, many companies use liquid ammonia gas protection as annealing. But liquid ammonia is a toxic gas, are dangerous chemic als in use, governance slightest negligence can easily leak once the leak will cause ammonia poisoning, light eyes, noses and burning sensation, runny nose, cough, sound hiss, headache, the jets off edema, severe cases can cause paralysis of the central nervous system, causing cramps or breathing reflex jets off to stop the rapid death.stainless steel pipe fittings

       Illegal use of a the liquid ammonia phenomenon is mainly focused on two aspects.stainless steel clamps

       The first is placed wrong with liquid ammonia, empty and full bottles of liquid ammonia is mixed at the same time on a production workshop, no specialized liquid ammonia placed between the event of a leak, the shop workers will suffer life-threatening.clamp ferrule

       Followed by the imperfect protection facilities, and a lot of liquid ammonia placed between supporting the anti-leak device, liquid ammonia manipulation staff not wearing gas masks and other shop floor workers do not have gas masks.

Stainless steel tableware Note

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stainless steel reducer - China Manufacturer

Thank you for inquiry my stainless steel reducer, Tel:+86-577-85989898, Email:JD@CNJIEDE.CN

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 1. Avoid storage acid, too alkaline foods.

Not suitable for stainless steel tableware Sheng salt, soy sauce, soup, etc., should not be in full bloom acidic fruit. Becaus e these foods in the electrolyte and the metal elements in the cutlery from the complex electrochemical reaction, which elements of excess dissolved release.

2. Bogey cook fried herbs.

Because of the complexity of herbal ingredients, mostly containing a variety of alkaloids, organic acids. When heated, it is easy and certain components from a chemical reaction in the stainless steel, so that efficacy decreased, and may even generate some of the more toxic substances.pipe fitting suppliers

3. Bogey and with the use of alum inum utensils.

One due to the two different hardness, the combination of the latter easier impaired; two aluminum and iron is two chemical activity of different metals, when they are a component in food (such as salts, acids, etc.) as the electrolyte, aluminum and The iron can form a chemical battery, more aluminum ions into the food. "Aluminum poisoning manifestations of mental decline, memory loss and senile dementia.

4. Hanged washed with strong bases and strong oxidizing agents.sanitary pipe fittings

Such as lye, soda and bleaching powder. These strong electrolyte is the same with some of the ingredients in the cutlery from the electrochemical reaction ", thus eroding the stainless steel cutlery, to its dissolution harmful elements.

5. Avoid fire cooking food.

Because of the small stainless steel thermal conductivity, the bottom heat slowly, such as firepower over too, can make the bottom of the charred, caking.

6. Poor quality, do not buy.sanitary pump

Inferior raw materials, production of rough because the stainless steel cutlery, contains a variety of heavy metals harmful to human health, especially lead, aluminum, mercury and cadmium, etc.

7 can not be empty burn.

Stainless steel cookware than iron products, aluminum products, thermal conductivity, heat and slow time, cause air burning cooker surface chrome plating aging off.