What is PE resin?
Polyethylene, abbreviated as PE, is a thermoplastic resin obtained by polymerization of ethylene. Industrially, copolymers of ethylene and a small amount of an α-olefin are also included.
What is PP material?
A commonly used PP material is isotactic polypropylene. Polypropylene is a high polymer. The monomer is propylene CH2=CH-CH3. Polypropylene is obtained by polyaddition of polypropylene. The chemical formula can be expressed as (C3H6)n, and the structure can be expressed as [-CH2-CH ( CH3)-]n. English full name: Polypropylene.
What is the shrinkage rate of PP?
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%.
Is PP harder than PE?
It is harder and has a higher melting point than PE. Since PP products of homopolymer type are very brittle when the PP temperature is higher than 0 °C, many commercial PP materials are random copolymers of 1 to 4% ethylene or block copolymers of higher ethylene content.
Does PP have oxidation resistance?
PP does not have oxidation resistance at high temperatures like PE. Polypropylene (PP) is one of the lighter plastics, and it has excellent electrical properties and can be used as a moisture-resistant high-frequency insulation material.
Is PP a polypropylene?
PP (polypropylene) can be divided into isotactic PP (polypropylene) and random PP (polypropylene) according to its crystallinity. Isotactic polypropylene is a highly crystalline thermoplastic resin with crystallinity of over 95% and molecular weight of 8- Between 150,000; atactic polypropylene is a non-crystalline, ...
PP (Polypropylen)
Diese Eigenschaften hat PP: Polypropylen zeichnet sich durch eine gewisse Härte und hohe Durchstoßfestigkeit aus. Zudem hat es eine geringe Wasserdampfdurchlässigkeit und ist sehr beständig gegenüber Fett. Auch bei warmen Temperaturen kann PP eingesetzt werden, so dass es heiß-siegel- und schweißfähig ist.
PET (Polyethylenterephthalat)
Diese Eigenschaften hat PET: PET ist ein sehr stabiler Kunststoff, der sich nicht dehnen lässt. Dadurch dass er extrem zäh und widerstandsfähig ist, ist er sehr bruchsicher. Das erklärt auch, warum er den meisten im Alltag vor allem durch Getränkeflaschen bekannt ist – zumal seine hohe Barriereeigenschaft auch Kohlensäure bewahrt.
PS (Polystyrol)
Diese Eigenschaften hat PS: Polystyrol hat eine relativ hohe Gas- sowie Wasserdampfdurchlässigkeit. Da es formstabil und sehr klar ist, erinnert es – nicht zuletzt aufgrund seines Oberflächenglanzes – an Glas. Je nach Einsatzzweck wird es in der Verarbeitung gespitzt, tiefgezogen oder geschäumt.
PLA (Polylactide)
Diese Eigenschaften hat PLA: PLA unterscheidet sich in einer großen Hinsicht von den anderen Kunststoffarten, die wir hier vorstellen: Es wird aus nachwachsenden Rohstoffen gefertigt, genauer gesagt sind die Polymere Polymilchsäuren. Um diese zu erhalten, benötigt es Stärke, die zum Beispiel aus Mais gewonnen wird.
PVC (Polyvinylchlorid)
PVC ist ein Kunststoff, der für eine Vielzahl von Produkten verwendet wird. Unterschieden wird dabei zwischen Hart- und Weich-PVC. Stand das Material früher in der Kritik, ist es inzwischen so weit entwickelt, dass es auch für Lebensmittel verwendet werden kann, etwa in Form von Frischhaltefolie.
PA (Polyamid)
Natürliche Polyamide trägt jeder von uns bei sich: in Form von Haaren und Eiweiß. Künstlich hergestelltes PA ist im Alltag auch als Nylon bekannt. Da der Stoff reißfest und elastisch ist, wird er nämlich oft zu Fasern verarbeitet.
Supply tightens on PE Blow Mold and Injection grades
During a busy PE trading week, a good smattering of high-density (HD), low-density (LD) and linear-low-density (LLD) PE grades transacted, while spot prices found a meaningful $0.02 to 0.03/lb uptick for the first time since late July 2021.
High-flow PP resins remain scarce
PP activity continued its strong pace to start the year. Demand picked up on the heels of more balanced supply/demand fundamentals and increasing energy and feedstock costs, which were enough to lift resin spot prices by $0.02/lb for the first time since early June 2021.
What is PP in packaging?
Polypropylene (PP) is a rigid and crystalline thermoplastic used widely in everyday objects like packaging trays, household products, battery cases, medical devices, etc. Explore this comprehensive guide and learn everything you need to know about this widely used thermoplastic.
What is EPP foam?
EPP bead foam has higher strength to weight ratio, excellent impact resistance, thermal insulation, and chemical and water resistance. EPP is used in various applications ranging from automobiles to packaging, from construction products to consumer goods and more.
What is the melting point of polypropylene?
Here are some key properties and benefits of polypropylene: Melting Point of Polypropylene - The melting point of polypropylene occurs at a range. Homopolymer: 160 - 165°C. Copolymer: 135 - 159°C. Density of Polypropylene - PP is one of the lightest polymers among all commodity plastics.
What is a spp?
Syndiotactic (sPP) - Alternating methyl group (CH 3) arrangement. Polypropylene was first polymerized by German chemist named Karl Rehn and an Italian chemist named Giulio Natta to a crystalline isotactic polymer in 1954.
Is PP rope good for marine use?
PP rope and twine are very strong and moisture resistant very suitable for marine applications. Medical Applications: Polypropylene is used in various medical applications due to high chemical and bacterial resistance. Also, the medical grade PP exhibits good resistance to steam sterilization.
Is PP a plastic?
PP is among the cheapest plastics available today. PP be longs to polyolefin family of polymers and is one of the top three widely used polymers today. Polypropylene has applications both as a plastic and a fiber in: It has the lowest density among commodity plastics.
Is PP a good polymer for 3D printing?
Due to its semi-crystalline structure and heavy warping, it is currently difficult to use polypropylene for 3D Printing processes.
What is PP in manufacturing?
What is Polypropylene (PP)? Polypropylene is produced by a process called chain-growth polymerization from monomer propylene. PP is the second most widely used plastic in the world. PP has a myriad of applications in clothing, medical, industrial applications, packaging, and labeling.
Is PP or PET better for a specific purpose?
Both PP and PET have their advantages and drawbacks. While PP might be well suited for some specific purposes, PET might be well suited for some other specific purposes.
Is PP plastic recyclable?
Recyclable. Both PP and PET are eco-balanced. Both the plastic can be easily recycled without any significant loss. Even though both PP and PET are on equal footing in this respect, it is important to mention that environmental friendliness is an important factor to be considered while selecting a plastic.
Is PP plastic permanent?
But the problem that might occur is that once printed, these containers cannot be repurposed to another use. So it is permanent in nature.
Is PET plastic better than PP?
PET plastic holds itself well in comparison to PP plastic. It shows a high level of durability than PP. PET plastic is also more reluctant to form cracks on impact. This might be important in some businesses but probably not an important factor for consideration for most businesses.