What is polypropylene polypropylene, the difference between polyethylene and polypropylene

Both polypropylene and polyethylene are soft rubbers, but polypropylene is comparatively much harder than polyethylene (you can't bite with your teeth). At present, there are no fanny packs made of these two materials, and I hope you can create them. Polyethylene with EVA glue will be a little softer.

PolyethyleneThe differences with polypropylene are as follows:

1. The heat resistance is different.

Polypropylene is more heat-resistant than polyethylene, which typically melts at about 40 to 50 percent higher than polyethylene, about 160-170. Polyethylene bags are more suitable for use under 90.

2. Rigidity and tensile strength.

Different. The main characteristics of polypropylene are low density, mechanical properties are better than polyethylene, and have outstanding rigidity. At the same time, due to the high tensile strength of polypropylene, and then good bending resistance, it is called "100 fold glue".

3. Low temperature resistance is different.

The low temperature resistance of polypropylene is weaker than that of polyethylene, and the impact strength at 0 is only half of that at 20, while the brittle temperature of polyethylene can generally reach below 50; and with the relative molecular mass.

can be increased to a minimum of 140.

Polypropylene is plastic.

Polypropylene is one of the five general plastics, and it is also the most commonly used plastic in household plastic products.

Polypropylene is a thermoplastic resin made by polymerization of propylene. There are three configurations: iso-gauge, unregulated and inter-regulated, and industrial products are mainly composed of iso-gauge substances. Polypropylene also includes copolymers of propylene with a small amount of ethylene.

It is usually a translucent colorless solid, odorless and non-toxic. Due to the regular structure and high crystallization, the melting point is as high as 167, heat resistance, and the products can be sterilized by steam is its outstanding advantage. Corrosion resistance, tensile strength 30MPa, strength, rigidity and transparency are better than polyethylene.

The disadvantage is that the low temperature impact resistance is poor, and it is easy to age, but it can be overcome by modification and adding antioxidants.

Polypropylene is a white waxy material, many people in the industry call it thermoplastic resin, this material is widely used, because its characteristics are very prominent, the first is very high heat resistance, the melting point reaches 160 degrees to 170 degrees, so many high-temperature products are made of this material.

<> polypropylene material is made of propylene, which is a semi-crystalline thermoplastic, with high impact resistance, very tough, and resistant to a variety of organic solvents and acid and alkali corrosion, it is also one of the most common general-purpose plastics. Colorless, tasteless, and non-toxic, it is a relatively light and thin plastic, shaped like a grain of rice, white with a little translucent, which makes people want to take a bite. The main use is in fiber, sportswear lining, the current surgical gown, disposable shoe covers, masks, surgical caps, etc. are used in polypropylene materials, which are widely used and are a popular material at present.

Polypropylene is a thermoplastic resin made by polymerization of propylene. According to the position of methyl arrangement, it is divided into three types: isometric polypropylene, random polypropylene and inter-conventional polypropylene.

Polypropylene is a non-toxic, odorless, tasteless milky white polymer with high crystals, and is one of the lightest varieties of all plastics at present. It is particularly stable to water, with an absorption rate of only 001%, with a molecular weight of about 80,000 to 150,000.

The formability is good, but due to the large shrinkage rate (1% Thick-walled products are easy to dent, and it is difficult to meet the requirements for some parts with high dimensional accuracy, and the surface gloss of the products is good.