Sealed Air Brings Fresh Clarity to Lightweight Cryovac PP Chilled Food Packaging with Millad NX 8000

Sealed Air Corporation is offering a range of lightweight polypropylene (PP) trays and pots with high clarity for chilled foods thanks to Milliken’s clarifying innovation Millad NX 8000. Sealed Air’s choice of Millad NX 8000 to up the clarity benchmark of its thermoformed Cryovac lidded trays and pots for meats, salads and other fresh produce, means food processors can benefit from the reduced packaging weight and lower carbon footprint of PP compared to alternative materials without comprising on packaging transparency or performance.

Due to its low density, PP packaging is typically 10 – 30% lighter and has a 24% lower carbon footprint than APET, for example, while offering the same strength and rigidity (Source: Intertek). Less material usage contributes to less post-consumer waste production too. Sealed Air’s Cryovac containers are non-brittle and break without sharp edges. The inherent higher heat resistance of PP trays and containers allows them to be reheated and also laminated in heat-sealing machinery without cracking or warping. PP is readily recyclable and straightforward to separate from other materials in the recycling chain, lending itself to re-use as food packaging or, through energy recovery, as a valuable source of energy.

Sealed Air’s customers have responded favorably to the company’s success in moving the clarity standard of its PP packaging upwards. By using Millad NX 8000, Sealed Air has also benefited from processing advantages in its production chain.

“Conventional clarifying agents don’t dissolve or disperse well in PP and this can cause a build-up on machinery during processing,” comments Michael Thomson, Sealed Air. “New generation Millad NX 8000 on the other hand is easy to process. This further plus point for the clarifier adds to its significant achievement in raising the clarity standard of our polypropylene applications for the food sector.”

Milliken provided technical support and the right solution to help Sealed Air achieve optimum clarity and offer the highly-demanding food industry a competitive packaging alternative to support producers in meeting UK and European guidelines regarding reduction in packaging weight, waste and CO₂ emissions.

Sami T.K. Palanisami, marketing and sales manager plastic additives EMEA, Milliken, adds: “High clarity polypropylene helps food producers create an appealing fresh-look for packaged foods. It also brings the valuable environmental advantage of lighter packaging with a low carbon footprint during production and transportation, achieving a combination of benefits that is not possible with other materials.”

About Milliken
Milliken is an innovation company that has been exploring, discovering, and creating ways to enhance people’s lives since 1865. Working from our laboratories, application and development centers around the world, our scientists and engineers create coatings, specialty chemicals, and advanced additive and colorant technologies that transform the way we experience products from automotive plastics to children’s art supplies. With expertise across a breadth of disciplines that also includes floor covering and performance materials, the people of Milliken work every day to add true value to people’s lives, improve health and safety, and make this world more sustainable.

About Sealed Air
Sealed Air is a global leader in food safety and security, facility hygiene and product protection. With widely recognized and inventive brands such as Bubble Wrap brand cushioning, Cryovac brand food packaging solutions and Diversey brand cleaning and hygiene solutions, Sealed Air offers efficient and sustainable solutions that create business value for customers, enhance the quality of life for consumers and provide a cleaner and healthier environment for future generations. Sealed Air generated revenue of approximately $7.6 billion in 2012, and has approximately 25,000 employees who serve customers in 175 countries.

Millad is a registered trademark of Milliken & Company.

NX is a trademark of Milliken & Company.

Milliken is a registered trademark of Milliken & Company.

Cryovac is a registered trademark of Cryovac Inc., a subsidiary of Sealed Air Corporation

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Know Your Lab Glassware: A Guide to Glass Beakers, Test Tubes, And Flasks

Know Your Lab Glassware: A Guide to Glass Beakers, Test Tubes, And Flasks

Indispensable in biological and chemical laboratories, lab glassware is traditionally made of heat-resistant glass but is now produced in plastics and plastic coated glass. Plastic ware is less expensive, less prone to breakage, and serves many purposes in the lab. Plastic coated glass is used for chemicals that present a danger if the glassware breaks. The plastic coating will hold the chemical until it can be properly disposed of. Glass is still preferred for many uses due to its transparency, heat resistance, and chemical stability.

The most commonly used glass is clear, borosilicate glass, also known as Pyrex, that can withstand the stress of heating. Brown or amber colored glass is used to keep contents protected from the ultraviolet and infrared spectrum of light and is available for glassware containers.

No matter what material laboratory glassware is made from, the names of the various glassware types remain consistent and are based on shape, volume, and intended use.


Laboratory flasks are characterized by their shape, with a larger base and narrow open neck. Flasks serve a variety of purposes from collecting liquids to heating mixtures. They vary in size and shape, some having two necks. They are also produced in both plastic and glass.

Erlenmeyer flasks, also known as conical flasks, are the most common type of lab flask. First used by the German chemist Emil Erlenmeyer, they are flat bottomed and shaped like a cone with a single neck.

A Buchner flask is basically an Erlenmeyer flask with a small tube extending horizontally out of the neck. The side arm is specially made to tightly fit a flexible hose. These flasks are made of thick glass to withstand pressure changes as they are frequently used to create vacuums.

Volumetric flasks are precision flasks intended for accurate measuring of liquids. Metric measurements are marked on the flask. The flask has a pear or slightly bulbous shape with a long thin neck.

Florence, or round-bottom flasks are generally spherical with one or more long necks. There are some flat-bottomed Florence flasks that can sit without being supported. These are produced of borosilicate glass as they are used for boiling over a Bunsen burner and must be heat resistant.

A retort is designed for distillation. It has a spherical base and a very long thin tapering neck that points downward. Liquid is heated in the base, and the condensation then runs down the neck to a different container.


Glass beakers are multi-purpose lab containers used for mixing and heating liquids. They have a cylindrical shape with a lip spout designed for pouring. Beakers are flat-bottomed and come in a variety of sizes, from one milliliter to large 10-liter plastic beakers. Although commonly made of borosilicate glass, plastic and stainless steel beakers are also produced. A beaker differs from a flask in their straight-sided shape. Most beakers are graduated, marked with metric units for measuring. They are used for a wide variety of purposes from mixing to heating.

Low form beakers differ from tall form beakers in the ratio of height to diameter. Low-form has approximately a 1.4 ratio while tall form is closer to 2. Flat beakers have a larger diameter than height and are used to evaporate liquids.


Designed to contain liquids for storage, bottles come in a wide variety of materials, sizes, and shapes. Some are made with a flaring mouth to accommodate a glass stopper. Others have screw-on plastic caps. Bottles come in clear glass or amber glass for light sensitive liquids. They may be jar-shaped with a wide mouth, jug-shaped with a small thumb loop for secure holding, or have a square base.


Funnels are inverted cones with a long straight neck. They are used for spill-free pouring from one container to another. They generally do not need to be heat resistant.


Glass burettes are very long graduated tube shaped pieces of glassware used for accurate measuring of liquids. They are filled from the top and empty out of the bottom. A stopcock is located near the bottom to control the flow of liquids through the burette. They are manufactured for extreme accuracy and can be used to check measurements on other laboratory glassware. Burettes generally come with supports to hold them in place while measuring and release of liquids occurs.

Test Tubes

Test tubes are round-bottomed, cylindrical glassware widely used in laboratories to hold or mix small amounts of material. They can be stoppered with cork or rubber, and special racks are made to hold a group of test tubes. Test tubes are frequently used to culture organisms in biology, and special racks hold these almost horizontally for maximum culture medium surface.

Test tubes serve a wide variety of purposes from temporary storage in the lab to flower vases outside the lab. They are used by biologists, medical professionals, botanists, forensic technicians, and casually to contain everything from kitchen spices to beads.

NovaTech International provides more information on Glass Beakers and other lab equipment.

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OPP / PET plastic bottles comprehensive comparative analysis-PET, OPP, plastic bottles – plastic industry

OPP / PET plastic bottles comprehensive comparative analysis-PET, OPP, plastic bottles – plastic industry

PET Plastic bottles Network oriented polypropylene plastic HC (O PP ) In the rigidity, transparency, barrier properties and processing of somewhat more fragile than PET, but PET OPP lower price than that, good heat resistance, the OPP in Food And non-food packaging has a great prospect. Despite its low production rate than PET, but with the resins and the addition of agents and through the continuous development of equipment technology, OPP had to replace the glass container, PET and PVC Containers. Currently, bottled water, fruit juice, hot filling food, and hygiene supplies packed powder market has emerged OPP containers, which are in one-step injection stretch blow (ISBM) and two-step heat stretch blow (SBM) molding machine molding, and both transparent and strong heat resistance, lower prices than traditional materials.

Typically, the density of PET bottle grade 1.35g/cc, the current price is 63 cents / pound, while the increased use of oriented polypropylene bottles through the density of PP random copolymer is about 0.910g/cc, sells for 56 cents / pound, so that OPP bottles PET bottles cost more than 40% reduction. Glenview, Illinois, the company’s R & D Manager, City KraftFoods Mr. SurendraAgarawal, compared with glass bottles, OPP bottle is light weight, unbreakable, and easy loading, and their “real transparency” and PET bottles of the same, so they want to use OPP bottles to reduce production costs. High-speed rotating heated SBM machine per hour can produce 60 000 PET bottles, compared to OPP bottles is because one step ISBM equipment, the efficiency is low, it is limited to use in children in Asia and South America nutrition supplements and drugs on the bottle, and in the United States is not widely used. OPP bottles to overcome the shortcomings

Date, OPP bottles as PET bottle processing speed than the slow, physical properties are relatively poor, it is not widely used. However, these shortcomings are by advanced machinery and equipment, optimized preform design, improved materials and PP resin, PP bottle for the development of additives which can be overcome. ExxonMobil’s research shows that high-speed machinery, the reasonable use and preform design allows OPP OPP with PET in the production, transparency, rigidity, toughness and sensory photogenic match. If you use such as Sidel Inc., SIGCorpoplast companies or other companies manufacture high-speed, rotating heated SBM machine, OPP bottles will have extremely competitive.

PP of disadvantage 1, PP PET is difficult to absorb and disperse than the heat, and the OPP’s sidewall thick preform (to reach the same rigid, OPP bottles need more than the same bottle PET bottle wall thickness). Thus, although PP preform injection phase in the lower processing temperature (230 ), but the OPP bottle blow molding will need to be completed in under 130 , not only the high energy than the PET bottles, and molding and cooling cycle is longer, resulting in the yield of OPP 25% less than PET. 2, OPP stretch blow molding processing temperature is relatively narrow, only 5 , while PET is 15 , thus increasing the probability of parking and waste outputs. In addition, OPP’s stretching different ways. This is because some parts of preforms, such as the bottom and bottlenecks, less than the orientation of the bottle, more likely to cause atomization. Therefore, in order to close OPP transparent PET, preform and bottle design OPP must optimize orientation and draw ratio. 3, OPP rigidity lower than the PET bottle meant OPP bottle top load and the weeks of low intensity. In order to achieve the same rigidity, OPP bottles need more than the same bottle PET bottle wall thickness. 4, OPP bottles of oxygen and carbon dioxide through PET bottles is about 30 times, it can not be dressed carbonated drinks such need CO2 barrier blocking the container, unless the barrier resin coating or with a total injection.

Currently, many companies on the PP through the research and development, improve the OPP bottles of some of the gaps. For example, 3988, to resolve, including Haze (mainly bottlenecks and bottom), preform molding cycle length (PP nucleation by enhancing the role of solution) and the blowing process when poor stability pull the issue. This Millad3988 AR agent in the United States market, outside the OPP bottles are widely used in vitamin, water, tea, juice, detergent and pharmaceutical packaging. ExxonMobil Corporation, Basell company, Atofina Corporation and BPPetrochemicals companies have implemented AR PP grades, they have a low residual rate of the catalyst used to replace the bottle can affect the appearance of the peroxide catalyst, OPP bottles with high transparency and high liquidity , rigidity and toughness are also achieve a good balance, thereby increasing OPP bottles in the packaging market competitive. Basell company OPP for the stretch blow bottle market developed metallocene PP (mPP). 18-MFR (melt flow rate 18g/10min) of MetoceneX50182 resin has Sidel machines trial, it can reduce the haze of the bottle to 1.5% will increase to 82% gloss. Atofina companies are producing OPP bottles used mPP, the resin used to mixing with conventional PP to increase transparency.

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