nonwoven wipes,just for easy clean!

+86-512-50313419

yc@yichenwipe.cn

Your position: Home > News > Industry News > Polypropylene Material
News
Industry News
NewsLetters
Certifications
Contact Us
Kunshan Yichen Clean Material Co., Ltd.
Tel .: + 86-512-50313419
Mobile: + 86-15895659543
Email: yc@yichenwipe.cn
Skype: yctekwipes
Address: No. 100 Fuxin Road, Zhe ... Contact Now
News
  • Spunlace nonwoven Fabric

    Spunlace (Also called Hydroentanglement) is a bonding process for wet or dry fibrous webs made by either carding, airlaying or wet-laying, the resulti...
  • Viscose method

    In 1894, English chemist Charles Frederick Cross, and his collaborators Edward John Bevan, and Clayton Beadle patented their artificial silk. They nam...
  • Cellulose Woodpulp

    Neucel Specialty Cellulose is a leading global manufacturer of dissolving woodpulp. Dissolving woodpulp is made from wood with a very high alpha-cellu...
  • Classification and application of non-woven fabrics

    Classification and application of non-woven fabrics Nonwoven fabric scientific name: Nonwovens, also known as Nonwovens, nonwoven fabrics, nonwoven fa...
  • Wood pulp Spunlace Compound Cloth is a Special Product

    Wood pulp spunlace non-woven fabric is an advanced water puncture equipment developed by independent innovation, which is made of high quality fiber a...
  • What is wood pulp spunlace nonwoven?

    Wood pulp spunlace nonwoven in normal spunlace nonwoven coated with a layer of wood pulp paper produced by the special spunlace nonwoven.It has a uniq...
  • What is Cleanroom and what can Cleanroom Wipers do ?

    A cleanroom or Clean Room is a working environment where concentration of airborne particles and contamination is controlled to maintain the specifie...
  • What is viscose And How it is Made

    Viscose is a unique form of wood cellulose acetate used in the manufacture of a number of different products. This includes items for the medical indu...
  • PP Fabric

    Polypropylene, a synthetic resin built up by the polymerization of propylene. One of the important family of polyolefin resins, polypropylene is molde...
  • Global Nonwoven Event INDEX will be held in Switzerland

    As the No.1 global nonwoven event,the INDEX will be held in Geneva,Switzerland on April 4-7,2017.According to the foremost INDEX exhibition,it attract...

News

Polypropylene Material

2017-09-25 16:24:44

Polypropylene is at room temperature resistant to fats and almost all organic solvents, apart from strong oxidants. Non-oxidizing acids and bases can be stored in containers made of PP. At elevated temperature, PP can be dissolved in nonpolarity solvents such as xylene, tetralin and decalin. Due to the tertiary carbon atom PP is chemically less resistant than PE (see Markovnikov rule).

Most commercial polypropylene is isotactic and has an intermediate level of crystallinity between that of low-density polyethylene (LDPE) and high-density polyethylene (HDPE). Isotactic & atactic polypropylene is soluble in P-xylene at 140 °C. Isotactic precipitates when the solution is cooled to 25 °C and atactic portion remains soluble in P-xylene.

The melt flow rate (MFR) or melt flow index (MFI) is a measure of molecular weight of polypropylene. The measure helps to determine how easily the molten raw material will flow during processing. Polypropylene with higher MFR will fill the plastic mold more easily during the injection or blow-molding production process. As the melt flow increases, however, some physical properties, like impact strength, will decrease.

There are three general types of polypropylene: homopolymer, random copolymer, and block copolymer. The comonomer is typically used with ethylene. Ethylene-propylene rubber or EPDM added to polypropylene homopolymer increases its low temperature impact strength. Randomly polymerized ethylene monomer added to polypropylene homopolymer decreases the polymer crystallinity, lowers the melting point and makes the polymer more transparent.