How to tell the difference between PP, OPP and BOPP bags

The BOPP bags and films are the most popular plastic packaging used by the food industry. BOPP bags can be coated, printed, laminated, and printed easily, making them ideal for packaging snacks, fresh produce, and confectioneries. OPP and PP bags, which can also be used for packaging, are also available on the market. Polypropylene, which is the main polymer used in the manufacture of all three bags, is the most common. PP stands to stand for Polypropylene. OPP stands out for Oriented Polypropylene and BOPP stands up for Biaxially Oriented Polypropylene. The style of fabrication is what makes them different.

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Pictured: Polypropylene bag

Polypropylene is also known as polypropene, a semi-crystalline thermoplastic plastic polymer. It is tough and strong, and has a high impact resistance. Polypropylene is used in popular packaging items like standup pouches and ziplock pouches. It is hard to tell the difference between PP, OPP and BOPP plastics at first glance. Touching the OPP plastic feels more brittle than the PP plastic.

Understanding their usage in real-world objects is the best way to tell the difference between PP, OPP, and BOPP bags. Non-woven bags are made from Polypropylene bags, also known as PP bags. These bags are treated to make them more water- or moisture-absorbing. Some of the most common PP products include diapers, air filters and sanitary napkins. Thermal clothing is made from the same material. They provide a temperature barrier.

Pictured: OPP bag

OPP bags are transparent in color and have a high tensile force. They can withstand high temperatures, but they will wrinkle if they are used too often. The same formula is used to make transparent adhesive tapes. These bags are tough to tear and are used for packaging leather products, clothing, and other items.

Pictured: BOPP bags

BOPP bags are clear polyethylene bags. The art of manufacturing is i.e. They are bi-axially oriented, which gives them a transparent appearance. This makes them ideal for branding with printing on their surfaces. The majority of BOPP bags are used for retail packaging. They are stronger and can carry more loads because of their biaxial orientation. BOPP bags are waterproof. They can protect your products from moisture for longer periods of time. These are the best cloth packaging options.

The Polypropylene derivatives i.e. The PP, OPP and BOPP are resistant against organic solvents, acids and alkalies. These are used widely in packaging industries where transport and storage under changing conditions is inevitable. They protect the product from dust and moisture, much like cling film. They can be recycled and have a lower carbon footprint. The PP, OPP and BOPP bags are a sustainable option from an environmental perspective.

Fast Direct Packaging also sells non-woven bags, vegetable and fruit crates.

The choice of packaging material inevitably influences its cost, durability, effectiveness and lead times. This is true across all industries, including bulk bags. Modern bulk bags have been engineered thoroughly and stood the rigours of various tests to prove that they are a great solution for storing and transporting large quantities of material.

However, there are three types of bulk bags that have different properties as a result of their fabric. All are made from polypropylene (PP), which is a strong and durable polymer. Knowing which PP fabric to choose can make a massive difference to the value that you get out of your packaging products.

Custom Bulk Bags is a leading manufacturer and supplier of high-quality bulk bags in South Africa. We produce up to 3.5 million bulk bags per year for various customers. All of our bulk bags have a minimum safety factor rating of 5:1 and are manufactured in accordance with international regulations and standards.

What are PP, OPP and BOPP?

PP is simply the acronym for polypropylene. This plastic has many beneficial properties that make it perfectly suited to packaging and protective coatings. It is often extruded into tapes and woven to create the fabric that is used to manufacture bulk bags. However, PP can be further manipulated.

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Orientated polypropylene (OPP) is a type of plastic film that is stretched in one direction, hence the microscopic fibres are aligned. This helps with strength and creates a clear plastic film. OPP is commonly used to manufacture small plastic bags, clear labels and flip files.

Biaxially orientated polypropylene (BOPP) is a plastic that is stretched in two perpendicular directions. This further improves the strength of the plastic and is highly suited to printing, which is why BOPP is often used as a clear coating or laminate over woven PP tapes used for bulk bags. BOPP is ideal for brands that need intricate printing and details on their bulk bags, such as barcodes and small labels.

Pros and cons of each polymer

PP:

• Recyclable, moisture-resistant, chemical-resistant, durable and versatile.
• Not very resistant to heat or flames and has limited printability.

OPP:

• Durable, transparent, glossy, dust-resistant and moisture-resistant.
• Difficult to stretch and are limited in their weight capacity.

BOPP:

• High tensile strength, recyclable, high dimensional stability, transparency, low electrostatic charge, high printability and resistant to oils and water.
• Low sealability. 

What is needed for your industry?

PP, OPP and BOPP are suited to specific applications. Your packaging company will be able to guide you towards the best product for your needs, but let&#;s cover some basics. PP bulk bags are your standard packaging product. They can also make good sandbags and geotextiles (or eco-bricks) due to their versatility, durability and cost-effective price point.

OPP is better suited to small packaging materials in the medical, pharmaceutical and food sectors. These packaging products don&#;t need to carry much weight, but they still need to be protective and durable. Think of sealable sandwich bags or packets for pills.

BOPP is best suited for heavier materials, such as dog food, charcoal or wood. However, when it comes to bulk bags, BOPP can be used as a laminate over the PP fabric to improve the durability of the packaging and the precision of printing.

Custom Bulk Bags manufactures an array of bulk bags that are suited to your needs. These are all based on PP fabric that is extruded and woven in-house. We offer several optional extras, including printing and customisation. For more information about our bulk bags, please contact us today.

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Custom Bulk Bags is a leading South African manufacturer of woven polypropylene bags for various industries, such as mining, chemicals and food. We are able to produce over 3.5-million bulk bags per year, keeping our customers in stock at all times. Our bags adhere to the highest levels of quality as a result of our stringent in-house testing and quality control programmes.

Custom Bulk Bags holds ISO certification and we currently have a number of UN-certified designs. We are a Level 2 B-BBEE manufacturer and supplier and fall under the ownership structure of Deneb Investments Limited. For more information on our products, contact . Follow us on Facebook for our latest news and industry insights.

Contact us to discuss your requirements of OEM OPP bag for packaging salsa jars. Our experienced sales team can help you identify the options that best suit your needs.