Product Description
PET (Polyethylene Terephthalate) Resin is cream or pale-yellow crystal, with smooth and shiny surface. Resistance to creep deformation, fatigue resistance, abrasion resistance and dimensional stability are perfect. Small wear and tear but high hardness, its toughness is the largest in thermoplastic. The electrical insulation of PET is perfect and little be affected by temperature, however, poor corona resistance. PET is non-toxic, weather resistance, and anti-chemical stability is very good. PET is low water absorption, resistance to weak acids and organic solvents. Intolerance of hot water immersion and alkali.
Feature:
1.Oil resistant, fat resistant, acid resistant, alkali resistant, resistant to most solvents.
2.Excellent resistance performance of high and low temperature.
3.Non-toxic, tasteless, CZPT and safety.
4.Transparent, UV blocking, good glossiness.
Specification :
|
PET RESIN Bottle-grade Polyester Chips |
||||
|
Item |
Unit |
Index |
Test Method |
|
|
I.V. |
dL/g |
0.80 ± 0.02 |
Reagent Ratio |
|
|
Crystallinity |
% |
≤ 60 |
|
|
|
Color value |
L |
|
≥ 83 |
HUTERLAB – |
|
|
b |
|
≤ 1.0 |
HUTERLAB – |
|
Content of COOH |
mol/t |
≤ 26 |
Photometric Titration |
|
|
Content of acetaldehy-de |
ppm |
≤ 1.0 |
|
|
|
Dust content |
ppm |
≤ 100 |
Weight Method |
|
|
Melting point |
°C |
243 ± 2 |
DSC |
|
|
Wt. of 100 chips |
g |
1.55 ± 0.10 |
Weight Method |
|
| PET resin Bottle-grade Polyester Chips | ||||
| Item | Unit | Index | Test Method | |
| I.V. | dL/g | 0.85 ± 0.02 | Reagent Ratio | |
| Crystallinity | % | ≤ 60 | ||
| Color value | L | ≥ 82 | HUTERLAB – | |
| b | ≤ 1.0 | HUTERLAB – | ||
| Content of COOH | mol/t | ≤ 35 | Photometric Titration | |
| Content of acetaldehy-de | ppm | ≤ 1.0 | ||
| Dust content | ppm | ≤ 100 | Weight Method | |
| Melting point | ºC | 243±2 | DSC | |
| Wt. of 100 chips | g | 1.55 ± 0.10 | Weight Method | |
1. Film & sheet :
all kinds of food, drugs, non-toxic sterile packaging materials;
textiles, precision instruments, electrical components of high-grade packaging materials;
audio and video tapes, film, computer floppy, metal coating and photographic film And other electronic and mechanical fields such as electrical insulating materials, capacitor films, flexible printed circuit boards, and membrane switches.
2. Application of packaging bottles: its application has been from the initial development of carbonated beverages to the present beer bottles, edible oil bottles, condiment bottles, medicine bottles, cosmetic bottles.
3. Electronic and Electrical Appliances: manufacturing connectors, coil bobbin, integrated circuit case, capacitor case, transformer case, TV accessories, tuner, switch, timer shell, automatic fuses, motor bracket and relays.
4. Auto parts: such as distribution panel cover, ignition coil, all kinds of valves, exhaust parts, distributor cover, measuring instrument cover, small motor cover, etc., can also use PET excellent coating, surface gloss and rigidity, Manufacture of automotive exterior parts.
5. Machinery and equipment: manufacturing gears, cams, pump housing, pulley, motor frame and watch parts, can also be used as microwave oven baking pan, a variety of roof, outdoor billboards and models.
Packaging, storage and transportation
It is packed in 0.5T woven bags or 25kg woven bags.
During transportation, it is not allowed to be exposed to the sun or rain, and mixed with sand, broken metal, coal and glass shipment, not to be mixed with toxic, corrosive or flammable materials. It is strictly forbidden to use sharp hooks during loading and unloading.Do not throw the tools to avoid damaging the package.
It should be stored in a clean, cool, dry and ventilated warehouse,Keep away from heat and direct sunlight.
If it is stored outdoors, it should be covered with tarpaulin. The storage period is from the date of production,generally no more than 3 months.
FAQ
Q: Are you trading company or manufacturer?
A: We are trader with our own factory.
Q: Can you support OEM /ODM?
A: Yes, we can make granules & compound according to your specification.
Q: How long does it take for production?
A: It’s up to your quantity. Monthly 15-30 days.
Q: What’s the quality assurance we provided and how do we control quality?
A: 100% inspection in production lines, establishing procedure to check product quality of each stage in the manufacturing process.
Types of Pulley Systems
If you’ve ever tried to lift a pail of water, you’ve probably seen the pulley system in action. Pulleys are extremely useful tools for everything from household appliances to heavy industrial machinery. Different kinds of pulley systems are classified according to their amount of motion. Some types have fixed axes, while others have movable axes. Some common uses of pulleys are listed below.
two-wheel pulley
Pulleys are complex structures with thin-walled and thick-walled sections. Therefore, they require specific forging designs. The tool concept for the production of pulleys is shown in Figure 11.6. Using the generated tool, the pulley can be forged into different shapes. Process parameters must be optimized based on material, surface quality and metallographic analysis.
Pulleys are wheels mounted on shafts. Its main function is to assist the movement of heavy objects. A single-wheel pulley can change the direction of the force, enabling a person to pull heavy objects. A dual-wheel pulley distributes the weight evenly across both wheels, allowing it to lift the same weight with half the effort.
The mechanical advantage of a two-wheel pulley is that it reduces the force required by about half. A 100 kg object can be lifted with a force of 500 Newtons. The mechanical advantage of a pulley with 2 wheels is twice that of a single-wheel pulley. However, care should always be taken when using two-wheel pulleys.
Two-wheel pulleys can be fixed or movable. A single wheel pulley can only change direction when the load is placed on 1 side of the wheel. Two-wheel pulleys change direction when lifting a load, requiring half the force. Live wheels are better for heavier loads. The movable pulley can be adjusted with the load, and the load distribution is more uniform. Active pulleys can be used with single-rope or two-wheel pulleys.
A pulley system with 2 wheels is called a compound pulley. This type of pulley system has a complex design that reduces the force required to move the load. Two-wheel pulleys are common in industrial and construction environments. These pulleys require a lot of space to install and operate. Additionally, they require regular maintenance to avoid wear and tear.
composite pulley
Compound pulleys are used to increase lift. One fixed pulley is attached to the overhead while the other fixed pulley is attached to the load. This setup minimizes the force required to lift weights, allowing you to lift heavier weights. There are several different types of compound pulleys, each with their own strengths and weaknesses. Below are some examples of their application. Some of the most common are listed below.
Composite pulleys are usually made from 2 different types of wheels. The first 1 is fixed and secure. The second type, movable, is attached to something that moves. The third type, compound pulley, is a combination of a movable pulley and a fixed pulley. Below are 3 types of comparisons. The table below compares them and explains their advantages and disadvantages. Composite pulleys are the most versatile of the three.
The number of sheave segments that make up the composite sheave system increases the mechanical advantage of the system. Each segment adds 1 percent of the total weight, and the ideal mechanical advantage is 2 or more. So a compound pulley with 4 segments will lift three-quarters of the weight. This is because the force applied to the load is multiplied by four. The result is a better boost.
While composite pulleys have many uses, they are most commonly used on larger sailboats. These pulleys work by changing the direction of the control wire or by changing the mechanical force of the rope. They also make it easier to lift heavier objects. Composite pulleys are more expensive than simple pulleys, so consider your needs before buying. The advantages of composite pulleys outweigh the disadvantages.
A basic compound pulley is a device consisting of 2 wheels with fixed points. Ropes are looped around the wheels and are used to lift heavy objects. When you pull on the rope, the rope pulls the 2 wheels closer together. Serious injury could result if this equipment is installed incorrectly. Never exceed the lifting capacity of pulleys and other safety devices that may be attached. When using pulleys, be sure to follow the instructions on the mounting hardware to avoid accidents.
Fixed pulley
Moving pulleys and fixed pulleys are different types of mechanical devices. The movable pulley moves with the object it is used to lift. Because it attaches to the object it is used to lift, it is great for lifting heavy objects. These devices are used in construction cranes and multipurpose elevators. There are many different types of pulleys, and their uses vary widely. Below is a brief overview of these devices.
The simplest pulley set consists of a wheel that is mounted on the ceiling. A rope is attached at 1 end and a person pulls at the other end. The rope is strong enough to keep a person standing while lifting weights. It takes about 200 Newtons of force to lift a 20 kg weight. In contrast, a movable pulley requires a force of 1000N, which makes it easier to lift heavy objects.
Fixed pulleys are another common lifting device. They work by using ropes and slotted wheels attached to the object to be lifted. These devices are convenient to use because they are easy to set up. Moving the scroll wheel doesn’t change direction, so it’s easier to move objects without putting too much pressure on the back. Unlike a moving rope, a moving object will feel much lighter than its actual weight.
Fixed pulleys are widely used in construction and agriculture. Fixed pulleys can help lift supplies and equipment from scaffolding. These items are often heavy and difficult to lift directly. Fixed pulleys at the top of the scaffolding will allow people at the bottom to lift objects more easily. As a result, those at the bottom are less stressed and more productive. Fixed pulleys will save time and money compared to moving ropes.
Composite pulleys combine fixed and movable pulleys to increase the power of movement. A compound pulley system uses both types of pulleys and enables a person to change direction by reversing the direction of a force. The compound pulley system will save time and effort as the user only has to put in half the effort. Unlike moving ropes, composite pulleys are easy to adjust and are the most versatile system on the market.
Blocks and tackles
A pulley block system is a rope hoist that uses a set of pulleys mounted on a frame. The blocks are arranged in a row, and the threaded rope is called a pulley. Pulley systems help amplify the tension of the rope and are common in sailboats, cranes and drilling rigs. However, these systems are not without drawbacks.
The pulley pulley system can be equipped with as many pulleys as required. This method allows a person to lift heavy objects. The pulley block system can contain the required number of pulleys to achieve the desired height. The main disadvantage of pulley systems is that they create a lot of friction on the pulley shaft.
Pulley systems use 2 types of pulleys. A movable pulley is attached to the load, allowing it to move with the load. On the other hand, fixed pulleys are fixed on fixed points. Therefore, a pulley block system may consist of multiple pulleys mounted on a shaft. For example, the 2 pulleys attached to the shaft each have their own mechanical advantages.
Several types of tackle systems have been developed in recent centuries. The most basic is the gun mount, which uses 2 pulleys to lift the load. The mechanical advantage of such a system is 2 to 3 times the distance required by the rope to move the load. Depending on how they’re assembled, the system can lift 400 pounds with 80 or 100 pounds of force.
Another type of pulley is a combination of multiple wheels. The wheels on pulleys are supported by a housing or frame. The chain is attached to the pulley, and the rope is pulled to lift it. A combined pulley system will have multiple wheels. As the load increases, the force on the pulley also increases. This approach is generally more expensive than intercept and intercept systems.
