#lowdensitypolyethylene

For decades, plastic resins are considered as the main base for all different plastics.

But through different molding and chemical processes, this resin plastic can transform to fit according to your needs.

First of all, these resins are created with heat that cracks down the hydrocarbons.

Due to the heating procedure, large molecules of resins are cracked down into small pieces of propylene and ethylene.

These plastic resins are highly energy efficient and lighter in weight as compared to other alternatives. 7 types of resins are easily available for the manufacturing process.

Let’s have a look at them and their common uses.

High-Density Polyethylene HPDE

Made up with petroleum, this High-Density Polyethylene has stronger intermolecular forces between its molecules as compared to other types of resins.

The tensile strength of HDPE is comparatively more powerful as compared to low-density polyethylene.

As compared to other types of plastic packaging, High-Density Polyethylene can with stand-in higher temperatures for longer periods. Such as 110 ◦C for continually and 120 C for short periods.

Common Uses

This HPDE plastic type is commonly used in milk jugs, grocery bags, motor oil, distilled water bottles, dish detergent, fabric softener, bleaches & lotions, liquid laundry, etc.

Properties

With different temp capabilities, this is stiff material

Provides excellent resistance against many solvents

It has a higher value of tensile strength

Polyethylene Terephthalate (PET)

PETE or PET belongs to the family of polyesters, and it is highly used in beverages, liquid and food containers. The structure of PET is semi-rigid, and it is not as heavy as compared to others.

Against solvents and alcohols, PETE acts an absolute barrier. For producing fiberfill and yawns of carpets, the clean & recycle pellets and flakes of PET are in great demand in the market.

Common Uses

PET is commonly used in peanut butter jars; fruit juices bottles, soft drink bottles, space blankets, alcohol beverages bottles, etc.

 Properties

Excellent resistance material to different solvents

High capability value

High impact value and shatter resistance

Excellently resist oxygen, water, and Carbon Dioxide

Low-Density Polyethylene

Made up from oil, LDPE has tensile power, and its density ratio is lower. As compared to HDPE, the resilience value of this plastic packaging is high.

This resin type can withstand 95 C for short periods and 80 C for a longer time.

Due to the high values toughness, flexibility, and transparency value, Low-Density Polyethylene packaging is used in film applications. This resin type is unbreakable.

Common Uses

The common uses of LDPE are in dry-cleaning bags; trash can liners, food storage containers, squeezable containers, six-pack soda can rings, bread bags, etc.

Properties

Act as a strong resilient against oils, acids, and bases

With toughness, flexibility and translucent, this resin type provides an excellent combination of packaging for the materials that require heat sealing

Polystyrene

Made up with petroleum, the pure form of PS is colorless.

Polystyrene is hard plastic with a limited coefficient of flexibility.

It can be transparent or can be molded into different colors; the general purpose of this plastic packaging material is rigid, hard and brittle. With low melting points, PS can make high impact polystyrene when it is combined with rubber.  

The HIP is commonly used for durable applications and rigid packaging purposes.

Common Uses

PS is commonly used in yogurt cups, drinking straws, vitamins syrup bottles, hot cups, clear carryout containers, bottle caps, knives & forks, egg cartons, fast food packets, etc.

Properties

In foamed form, it has excellent insulation properties

The low thermal conductivity value

Offers significant value off stiffness

For short-shelf life products, it can act as an excellent barrier

Offers high optical clarity value

Polyvinyl Chloride or PVC

In PVC, 45% of its texture contains chloride, and it requires less petroleum in its manufacturing process.

After PET, PVC is considered as the most widely used plastic because it is chemically and biologically resistant.

In addition to the list of its stable properties, PVS has high values of stable electrical properties, weather abilities and flow characteristics.

PVC products with their diverse slate are widely distributed into flexible and rigid materials.

Common Uses

PVC is commonly used in clothing bags, electrical wire insulation, tubing, upholstery, pipes, chemical water bottles, waterbeds, pool toys, plastic bottles, etc.

Properties

The rigid packaging of PVC includes

Clamshells

Blister packs

Flexible packaging of PVC includes

Shrink wraps

Meet wrap

Bags for bedding & medical purposes

Tamper resistant

Polypropylene

With a low coefficient of toughness as compared to HDPE, PP is often used for the packaging of food.

With less bristling values, PP is not so flexible like LDPE. Translucent in nature and reasonably economical, PP is stiffer than other types of plastic packaging.

With the high value of resistance, the melting point of Polypropylene is 160 C. As PP is used in food containers so it can’t be melted down into hot water and hot dishwasher.

Common Uses

PP is commonly used in the drinking straws, battery cases, hinged containers, bottle caps, liners of cereal boxes etc.

Properties

Best for the bottles of syrups and catsup

Safe for medicine bottles

Highly effective for the containers of deli food, takeout meals, yogurt and margarine

Closures and bottle caps

Others

This is the category in which biodegradable, chemically wash, photosensitive and plant-based type of plastics can fit. Basically, any resin type other than PP, PS PVC, PRT, and HDPE & LDPE can fit into this category.

The original 6 plastic resigns developed in 1988 and registered with the mark of other 7 plastic packaging type identifications.

Listing the properties and common uses of these other types of resins are nearly impossible due to the high level of diversity in their applications and features.

On the basis of production, product details, brief information about end sale, the capacity of the plastic, and basic inventory measures, The Plastic Industry Producers Statistic Group of American Chemistry Council has provided timely, relevant, extensive business use and comprehensive report on resins.

Resin packaging producers use this PIPS report for making critical decisions in business.

Reference

https://www.chemicalsafetyfacts.org/types-plastic-food-packaging-safety-close-look/

https://plastics.americanchemistry.com/Jobs/EconomicStatistics/Plastics-Statistics/