Plastic mesh - definition and characteristics of polypropylene

Polypropylene English name: Polypropylene, referred to as: PP, commonly known as: 100% plastic. Polypropylene is a representative of poly-α-olefin, a thermoplastic resin obtained by polymerizing propylene, and its monomer is propylene CH2=CH-CH3. Depending on the initiator and polymerization process, polypropylene can be classified into isotactic polypropylene and atactic polypropylene and syndiotactic polypropylene. The isotactic polypropylene is easy to form a crystalline state, the crystallinity is as high as 95% or more, and the molecular weight is between 80,000 and 150,000, which gives him good heat resistance and solvent resistance; the random polypropylene is amorphous at room temperature. The micro-band viscous white wax has a low molecular weight of 3,000-10,000, and the structure is irregular and lacks cohesion, and the application is less.
PP is a semi-crystalline material. It is harder and has a higher melting point than PE. Since the PP product homopolymer type has a PP temperature higher than 0 ° C or more, many commercial PP materials are random copolymers of 1 to 4% ethylene or block copolymers of a higher ratio of ethylene. The copolymer type PP material has a low heat distortion temperature (100 ° C), low transparency, low gloss, low rigidity, but has stronger impact strength. The strength of PP increases as the ethylene content increases. The Vicat softening temperature of PP is 150 °C. Due to the high degree of crystallinity, this material has excellent surface stiffness and scratch resistance. There is no environmental stress cracking problem in PP. Typically, PP is modified by the addition of glass fibers, metal additives or thermoplastic rubber. The flow rate of PP has a MFR ranging from 1 to 40. Low MFR PP materials have better impact resistance but lower elongation. For materials of the same MFR, the strength of the copolymer type is higher than that of the homopolymer type. Due to crystallization, the shrinkage rate of PP is quite high, generally 1.8 to 2.5%. And the direction uniformity of shrinkage is much better than materials such as PE-HD. The addition of 30% glass additive can reduce the shrinkage to 0.7%. Both the homopolymer type and the copolymer type PP materials have excellent moisture absorption resistance, acid and alkali corrosion resistance, and solubility resistance. However, it is not resistant to aromatic hydrocarbons such as benzene solvents, chlorinated hydrocarbons (carbon tetrachloride) solvents, and the like. PP does not have oxidation resistance at high temperatures like PE.

Jiuzhi Plastics Network

Glass Sliding Door

Products characters

1.All the products produced by good quality building material factory need get through three strict inspections before packing: Raw material cutting test, Production process inspection, The finished debugging.

2.Providing customized service to apply each customer requirements, we will try our best to achieve 100% customer satisfaction.


Profile

1.High quality aluminum alloy profiles, thickness 1.2-2.0mm

2.Excellent quality thermal break aluminum profiles, thickness 1.4-3.0mm

3.PVC/UPVC material (need to be ordered)



Color

White/ Sliver / Grey / Champagne / Black / Wood grain / special color can be ordered


Glass Type

1.Single toughened glazing:6mm/8mm/10mm/12mm...

2.Double toughened glazing:5+12A+5mm/6+12A+6mm...

3.Laminated glazing:5+0.38PVB+5mm/6+0.76PVB+6mm...

4.Low-E glazing:Green/Blue/Brown/Golden...

5.Other glazing:frosted glass/crystal glass/art glass...


Mesh

1.Aluminum security mesh

2.Stainless steel security mesh

3.Solid iron security mesh

4.Mosquito net(Nylon,Stainless steel,Diamond)


Hardware

1.Germany brand

2.Japanese brand

3.Chinese top brand


Surface treatment

1.Anodizing

2.Powder coating

3.Electrophoresis

4.Fluorocarbon paint

Glass Sliding Door,Tempered Glass Sliding Door,Double Glass Sliding Door,Automatic Glass Sliding Door

Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hfgaragedoor.com