Determine the Properties of Polymers at Different Temperature

Most of the Plastics at normal room temperatures usually show the properties of flexibility and high resistance of the material to cracking but when the temperature decreases the rapid changes in the properties of the plastics can be viewed as plastics become brittle at low temperature. Low temperature can be more harmful to plastics rather than high temperatures. The failure of the plastic material occurs when the material is not taken into account after considering the low-temperature properties of the plastics.

How Plastics Reacts at different temperatures?

Plastics comprises of long chains of molecules that are joined with each other. The degree of tangle changes with the shape and length of the polymers. The basic way to examine the quality of the polymers is to heat then at high temperature. You will observe that at the time of heating all the molecules will be tangled up, and each particle will form a long chain, but when the polymer is cooled down, the molecules of the polymers get stacked one above the other and affects the shape of the polymers. Similarly, the long chains in most of the polymers at moderate temperatures are slip over one another and the resistance of the material to crack becomes strong. This state of the polymer is considered as Rubbery.

Testing Machines for Determination of Different Temperatures

· Ultra-Low Deep Freezer — The testing device is used to create extremely low temperatures inside the chambers that help to analyze the properties of polymers and to measure the behavior of different types of plastics.

· Humidity Test Chambers — The instrument is used to determine the quality of the products at varied temperatures. The device creates both high and low temperature inside the laboratories to measure the effect of fog and humidity on the physical, chemical and mechanical properties of the materials.

The manufacturers in polymer industries make use of high-quality testing machines to test the quality of the polymers at low and high temperatures such as ultra-low deep freezers, humidity test chambers, muffle furnace, and many more. These testing instruments are used by the manufacturers in order to assure the quality of the products to end customers and also to enhance the quality of products to enhance the working life of the product. The technique of quality testing is followed to enlarge the list of satisfied customers. Presto, being one of the renowned manufacturer and suppliers of testing devices manufactures a wide range of testing machine to determine the effect of low and high temperatures on polymers. These testing machines are designed keeping in mind the standards that are introduced by various standardization authorities such as ASTM, ISO, BIS and many more.

The advantages of the extrusion blow molding

Molding Machine are those which are used to make shapes out of materials such as plastic, rubber and metal. There are a lot of different techniques for molding materials. The Stretch Blow Molding Machine techniques used is thermoses and thermoplastics and these change the nature of the plastic that has been processed through these techniques. Thermo sets make the plastic retain the shape that it has been molded in. Once you try to change it, you will have to melt it and in this process, this plastic will burn and become useless. The molded thermoplastics are made in small pieces that make their transportation easier and then melted together to make a pool out of it after which it can be given the shape of anything that the manufacturer wants to produce.

1)The cost of the extrusion blow molding machine is cheaper than that of injection molding machine, about one third of the injection blow molding machine.

2)On blowing molding, the preform is formed under low pressure through the extrusion equipment heat, in this circumstance, the residual stress of the products is small. With its good performance in tensile, impact, bending and other variety of environments, It have the good function.

3)In the injection blow molding, the plastic melt at high pressure (15–140Mpa) through the mold runner and gate, which will lead to uneven stress distribution.

4)The moleculars of blowing mold grade plastics(e.g,PE)are more than that of injection mold.
Such blow molding products have a high impact toughness and high resistance to environmental stress cracking performance, which is very favorable for the large-capacity production of plastic bottles.

5)The wall thickness of the blow molding products can be very thin while the injection molding products cannot be so thin as blowing mold process.

6)Blow molding process can shape complex and irregular products, but the injection molding process has to produce two or more pieces, and then stick it by the glue or bond it or using ultrasonic welding.

Source:https://www.sukoptfe.com/the-advantages-of-the-extrusion-blow-molding

Benefits of a Gas Furnace

If you are considering your different options that may be used for home heating, you should definitely take a look at the gas furnaces. If you are planning to get a new heating system installed, it is best to do it at the onset of winters. They have a lot of advantages over other types of furnaces like oil or electric ones. Before you take the final step and purchase the furnace, please take into account the list of benefits that we have compiled.

Monetary benefits

Gas furnaces are not expensive to maintain. Yes, electric furnaces might be cheaper, but they can never provide the same output of heat. On the other hand, gas furnaces are rather durable and would not break down often. Therefore you wouldn’t have to worry about repairing them a lot. Buying a gas furnace is always a good investment and it is a one-time purchase because once you buy it you won’t have to worry about it for the next 15 years.

If you also consider some of the short term advantages, keep in mind that gas furnaces are going to save you a lot of money on your utility bills. Most of these devices use natural gas and it is yet the cheapest fossil fuel available on the market. It is also the cleanest of them all which means there won’t be additional harmful fumes.

Increased efficiency

Gas is the most efficient fuel on the market that you can burn. If you make a comparison between all of the fossil fuels, you would find out that gas produces the most heat if we consider the amount that has been burned. In addition it produces the least amount of waste in comparison to other fuels. Natural gas in general is an excellent choice.

Highest quality heating

The truth is that natural gas furnaces are generally of the highest quality that you can find for your home. They could be used as part of your central heating system or as a water heater, for instance, or actually for everything that might require heat.
All in all, gas furnaces are truly one of the best solutions for heating up your home. Not only would they provide a warm environment but they also bring a lot of comfort on the table. You can be sure that it won’t be costly, especially if the whole installation is done by the book. There are a lot of reasons that you could take into consideration while shopping for a furnace, but gas powered furnaces undeniably are something to consider. It may be a bit more expensive and larger than most of the electric furnaces but it is a one-time investment for the next 15 years at the very least and it is going to offer a great return on investment ratio with the efficiency it offers.

Plastic Single Screw Extruder

 

Single screw extrusion is one of the core operations in polymer processing and is also a key component in many other processing operations. The foremost goal of a single screw extrusion process is to build pressure in a polymer melt so that it can be extruded through a die or injected into a mold. Most machines are plasticizing: they bring in solids in pellet or powder form and melt them as well as building pressure.

A single-screw extruder is a press which pushes material through its barrel under conditions of high pressure and temperature. It can produce objects of different length with a cross-section corresponding to the outlet opening.

Benefits of Sunkoo Screw Extruder:

Sunkoo engineer has design Single Screw Extruders with modular design concepts to meet market requirements. The result is built-in flexibility, lower cost, faster deliveries and ultimately, an exceptionally competitive value to our customers, from stand-alone extruders to complete systems. The single screw extruders handle applications such as sheet, custom profile, pipe, pelletizing, medical tubing, wire and cable.

Applications

The extrusion process melts the raw material and then hardens it once shaped. It can be applied to ceramics, rubber, thermoplastic polymers, pasta and other food products.

Plastic Injection Machine and its functions

Concept of mold and molding is quite popular in the plastic industries. Plastic has the advantageous features like high malleability, cheap in cost, high stability. So it is being used pervasively in molding. Basically Plastic injection molding is the main process for manufacturing plastic parts. Coming to the concept of molding, it is a process of manufacturing by which liquid or pliable new material get a rigid shape called a mold. In simple terms, plastic molding is a process where plastic is molded into the desired shape.

Injection molding has a great contribution in manufacturing so many domestic and industrial products. It is used to create many types of equipment like such as electronic housings, containers, bottle caps, automotive interiors, combs, and most other plastic products available today. The features like high tolerance precision, repeatability, large material selection, low labor cost, minimal scrap losses, and little need to finish parts after molding are the major advantages of the injection molding.

The plastic injection mold generally require followings in the process of plastic injection molding-

1. an injection molding machine
2. raw plastic material
3. A mold.

For manufacturing of plastic injections, there are various types of raw materials such as thermosetting plastic, elastomers and thermoplastic polymers (resins) etc are used for manufacturing of plastic injections as these materials have a greater viscosity. The plastic injection machines have basic component parts such as material hopper, heating unit, plunger etc. The plastic is melted in the injection molding machine and then injected into the mold, where it cools and solidifies into the final part.

Plastic Tube Types explained

With the array of collapsible plastic tube options available, it can sometimes be difficult to select the correct tube type for a product.

MonoLayer Collapsible Plastic Tubes:

Monolayer plastic tubes are formed through the extrusion process, where a cylinder of plastic material is pushed or drawn through the required diameter cross section and cut into the desired tube length.

Monolayer tubes are formed of one layer of plastic material, which can be made up of a certain percentage of LDPE or HDPE. e.g. tubes can be 100% HDPE, 80% HDPE 20% LDPE or any other requried combination depending on what properties you require from the tube.

Collapsible Plastic Tubes (Multi Layered Plastic Tubes):

A collapsible plastic tube comprising a laminate of an inner ply and an outer ply, the inner ply being a heat flowable nonoriented thermoplastic polymer and the outer ply being a heat flowable, oriented, shrunk thermoplastic polymer.

The collapsible plastic tube of this invention is also excellently adapted for making packaging and dispensing tubes for items such as toothpaste, shaving cream, lubricating greases, medicinal pastes, ointments, and the like.

Laminated Tubes:

Laminate tubes are manufactured by using the laminate feed stock that is simply a poly-foil-poly structure that has polyethylene on either side of a thin gauge of foil.
Some laminate structures also incorporate paper.

A subset of laminate is Polyfoil. The most popular way of decorating the laminate feedstock material is by either letterpress or rotogravure printing.

Rotogravure printing is used extensively to provide a high quality print buried within the laminate structure. Letterpress printing is used to decorate the surface of the laminate feedstock just prior to tubing that is ideal for added flexibility or smaller quantities.

Multiflex® Tubes:

Multiflex tubes are manufactured from laminate, however contrary to the lamination process there are no distinctive weld seams since the layers are not overlap-wealded, but fused bluntly and reinforced with a thin plastic strip, allowing for 360 degree print.

Also, with Multiflex tubes they are able to have different material in the inner layer compared to the outer layer, which is not possible with laminated tubes.

Source:https://www.sukoptfe.com/plastic-tube-types-explained

20 - 150 mm PTFE Tube Ram Extruder Machine

Single Screw Extruder Features Include:

1.Vertical Ram Extruder for PTFE Tubes

2.Ram extruding machine for PTFE Tubes.

3.Using for Pre-sintering PTFE material.

4.Suit for new PTFE material or Recycle PTFE material.

5. Adjustable Heating zone: 5 zone area

6. Long service life through solid workmanship and use of high quality components.

7. Measurement transducer like pressure, force and ram speed for permanent control of the extrusion process and extrusion speed.

8. Measuring and controlling system for constant extruder speed

9. Low space requirement through vertical construction

10.Operating through touch screen and recording of the extrusion process parameters

Benefits:

1. Save time and money, good advantage price offer to customers.

2. Intelligent and easy-to-use operations.

3. Small workplace required due to its compact design and electricity saving machine.

4. Super quality output and the physical properties is adjustable.

5. Precise temperature control, reaches + -1 degree.

6. Long- life, with modern technology and optimized design.