midterm

lecture 1 "What is Packaging."

Overview and Market Significance

Packaging is defined as a coordinated system designed for the transport, distribution, storage, retailing, and use of goods. It is a massive and growing global industry, with the market size projected to reach $1.75 trillion by 2035. Beyond its utility, packaging serves as a critical marketing tool; 7 in 10 shoppers report that packaging influences their purchase decisions, and many are willing to pay more for a "good" package. Steve Jobs famously viewed packaging as "theater" that could create a story for the consumer.

The Three Levels of Packaging

Packaging is categorized into three distinct levels based on its relationship to the product and the supply chain:

• Primary Packaging: The first wrap or containment that directly holds the product (e.g., a water bottle or a medicine blister pack). It is usually the smallest unit and the one that goes home with the consumer.

• Secondary Packaging: A containment that groups primary packages together (e.g., a corrugated box or shrink film holding multiple bottles).

• Tertiary Packaging: Its prime purpose is to protect the product during distribution and ensure efficient manual handling (e.g., pallets, stretch film, and slip sheets). When these levels are assembled for shipping, they are referred to as a Unit Load.

The Five Primary Functions of Packaging

The sources outline five core technical and marketing functions of a package:

1. Contain: This is the basic requirement to keep the product together and prevent leaks or spills.

2. Protect: This refers to preventing physical damage and pilferage. Packaging must withstand environmental factors like shock, vibration, temperature, and humidity. Poor protection affects sales, as 58% of shoppers have considered switching to another company if a package arrived damaged.

3. Preserve: This involves extending shelf life and maintaining sterility. It protects against "biotic" spoilage (microorganisms) and "abiotic" spoilage (oxygen, light, moisture) using methods like oxygen scavengers or Modified Atmosphere Packaging (MAP).

4. Create Convenience: Packaging is designed to be easy to use for consumers (reseals, dispensing features) and efficient for retailers (tracking codes, easy-to-handle displays).

5. Provide Information: Packaging acts as "last chance advertising" and must meet legal regulations, such as the Consumer Packaging and Labelling Act, which requires the product name, net quantity, and dealer identification. It is also increasingly focused on accessibility, such as the use of Braille.

Careers and Education

Packaging is a highly interdisciplinary field where engineers and designers must collaborate with departments like marketing, quality assurance, logistics, and sustainability. The food industry is the largest employer of packaging professionals (41%), followed by medical (28%) and beverage (26%) sectors. Career opportunities are lucrative, with average total compensation for those with 20+ years of experience reaching approximately $141,152. Education in this field covers various specializations, including packaging science, engineering, and technology, utilizing specialized software like ArtiosCAD for structural design and Adobe Illustrator for graphic design

Lecture 02: Packaging materials and substrates – Part A" offer a detailed look at the common materials used in packaging, specifically focusing on glass, metal, and paperboard.

Substrates vs. Materials

The lecture distinguishes between two key terms:

• Substrate: The specific material that is printed upon, such as a paper label.

• Material: Other components of the package that are not directly printed on, such as a glass bottle. Common packaging materials include plastic, metal, paperboard, foils, and corrugates.

Glass Packaging

Glass is one of the oldest packaging forms and is valued for being inert, meaning it does not interact with food or pharmaceuticals.

• Production: Ingredients include silica sand, soda ash, limestone, and cullet (recycled glass), which are melted at temperatures between 1000–1500°C. A specific amount of molten glass, called a gob, is used to form each container.

• Forming Processes: Containers are created using a parison (blank mold) through three primary methods: Blow-and-blow (BB), Press-and-blow (PB), or Narrow neck press-and-blow (NNPB).

• Finishing: After forming, glass undergoes annealing—a slow cooling process in a "lehr" to remove internal stresses—and surface treatments (coatings) to reduce friction and breakage.

• Pros and Cons: While glass offers excellent vertical strength and UV protection (in amber/brown colors), it is heavy, expensive to manufacture, and presents safety risks if broken.

Metal Packaging (Cans)

Metal is widely used due to its low cost, thermal stability, and excellent light and moisture barriers.

• Materials: Most cans are made from aluminum (derived from Bauxite) or tinplate (tin-coated steel). Aluminum is the third most abundant element, while tinplate uses purified liquid iron coated to prevent corrosion.

• Structural Types:

    ◦ 3-Piece Cans: Consist of a bottom lid, a cylindrical body with a welded seam, and a top lid.

    ◦ 2-Piece Cans: Feature an integrated body and bottom lid with a separate top lid; these are faster to manufacture but limited in size.

• Manufacturing Methods: These include Shallow Draw (pet food), Draw and Redraw (soup), Draw and Wall-Iron (soda), and Impact Extrusion (aerosols and tubes).

• Safety and Quality: Cans often require food-safe organic coatings to prevent tin from leaching into food. Quality testing is rigorous, checking for dimensions, strength, coating integrity, and "pop and pull" loads for easy-open ends.

Paperboard

Also known as cardboard or boxboard, paperboard is defined as having a grammage of 250 gsm or higher.

• Key Types:

    ◦ Solid Bleached Board (SBB/SBS): Made from virgin bleached chemical pulp; used for high-end products like cosmetics.

    ◦ Solid Unbleached Board (SUB/SUS): Made from unbleached virgin chemical pulp; used for beverage carriers and frozen foods.

    ◦ Folding Boxboard (FBB): Virgin mechanical pulp sandwiched between chemical pulp layers; offers good stiffness.

    ◦ White Lined Chipboard (WLC/CRB): Created from multiple layers of recycled fibers for lower-end packaging.

• Properties and Design: The performance of paperboard depends on the fiber source and whether mechanical pulp (stiffer, lower density) or chemical pulp (stronger, better surface) is used. Designers must consider grain direction, as it affects how the board folds and stands. While versatile, paperboards lined with aluminum or polymer films are not ideal for recycling

Lecture 03: Packaging materials and substrates – Part B," details the technical properties, manufacturing processes, and applications of common packaging materials, including corrugated paperboard, plastics, labels, aluminum foil, and multilayer structures.

Corrugated Paperboard

Corrugated board is a primary material for shipping, consisting of liners (flat outer layers) and a corrugated medium (fluting) joined by adhesive.

• Structural Types: Configurations include Single Face (one liner/one medium), Single Wall (two liners/one medium), and up to Triple Wall for maximum strength.

• Fluting and Strength: Flute sizes range from A (thickest, 5mm) to F (thinnest, 0.6mm). Larger flutes provide greater strength and cushioning, while finer flutes allow for better print quality.

• Testing and Design: The Edge-Wise Crush Test (ECT) is the most significant test used to predict a box's compression strength. The most common box style is the Regular Slotted Container (RSC).

Plastic Packaging

Plastics are lightweight, versatile, and generally derived from crude oil. They are categorized into two main classes:

• Thermoset Plastics: Form irreversible chemical bonds; they are heat-resistant but cannot be recycled (e.g., epoxy).

• Thermoplastics: The curing process is reversible, allowing them to be remelted and recycled. These are the most common materials for packaging.

• Key Polymers:

    ◦ Polyethylene (PE): Includes LDPE (flexible bags/shrink wrap), LLDPE (stretch wrap), and HDPE (rigid, used for milk and detergent bottles).

    ◦ Polypropylene (PP): Strong and chemical-resistant; ideal for hot-fill liquids and yogurt containers.

    ◦ Polyethylene Terephthalate (PET): High oxygen and CO2 barrier; used for soft drink bottles and jars.

    ◦ Polyvinyl Chloride (PVC): High clarity and impact strength; used for blister packs and clamshells.

    ◦ Polystyrene (PS): Used for rigid containers (yogurt) and as Expanded Polystyrene (EPS/Styrofoam) for insulation and cushioning.

Labels and Information

Labels provide the critical "Information" function of packaging identified in earlier lectures.

• Types: Evolution has moved from glue-applied labels to Pressure Sensitive (self-adhesive), In-Mould (applied during plastic injection), and Shrink Sleeves (providing tamper evidence).

• Smart Labels: Modern packaging utilizes UID (Unique Identifier) codes and NFC (Near Field Communication) smart tags for wireless communication with devices.

Aluminum Foil and Multilayer Materials

• Aluminum Foil: Valued for being non-absorbent, conductive, and corrosion-resistant. However, it is prone to flex cracking and loses strength above 150°C.

• Multilayer Materials: Packaging often combines 2 to 8 layers of different materials (e.g., plastic, paperboard, and foil) to maximize barrier performance and strength (e.g., Tetrapak).

• Sustainability Challenge: A key point of the source is that while mixing materials creates superior protection, it makes recycling extremely difficult

Based on the source "Lecture 04: Marketing, Branding, Packaging," the following is a comprehensive summary of how packaging functions as a critical bridge between a product and its consumer.

The "Fifth P" of Marketing

Marketing is defined as the process of creating, communicating, and delivering offerings that have value for customers. While traditional marketing focuses on the 4 Ps (Product, Price, Promotion, and Place), packaging is increasingly considered the 5th P. It serves as "physical evidence" of a brand, acting as a silent salesperson that fulfills both functional roles (protection and logistics) and aesthetic roles (attracting attention and communicating identity).

Components of a Branding Package

A successful branding package consists of three integrated components that distinguish a product from its competition:

  • Structural Components: These include the dimensions, shape, and materials. The best structures fulfill technical requirements first but then go beyond utility to become part of the brand experience, such as the unique triangular shape of a Toblerone bar.

  • Graphic Components: These comprise colors, logos, pictures, and slogans. Graphics are essential for motivating a purchase decision; for example, the specific red used in Tim Hortons or the minimalist white of Apple packaging.

  • Tactile Components: This refers to textures and coatings. Research shows consumers often prefer "Soft Touch" or "Hi Rise" coatings over plain packaging, as touch can influence perception.

Consumer Behavior and Market Research

Packaging must be designed to stand out in high-density retail environments where a superstore may carry up to 40,000 products. Key statistics regarding consumer behavior include:

  • The 7-Second Rule: A consumer’s attention span for a specific product is typically seven seconds or less.

  • Detection Distance: On a shelf, color is detectable from 10 meters away, while shape is detectable from 4 meters.

  • Evaluation Methods: To ensure success, companies use eye-tracking research (sometimes in Virtual Reality) to see what the eye focuses on, as well as focus groups and mall intercept interviews to gauge emotional engagement.

Redesign Strategies and Case Studies

Redesigning a package usually occurs between the maturity and decline stages of a product's life cycle. The sources highlight two contrasting case studies:

  • Success (Monster Energy): Originally "Hansen’s," the brand was out of step with the energy drink demographic. By creating the "Monster" brand with a simple, authoritative design, the company saw sales grow to over $3 billion and experienced growth of over 23,000% since 1996.

  • Failure (Tropicana): Tropicana attempted to redesign its orange juice carafes by changing the logo, typography, lid, and imagery all at once. Consumers failed to recognize the product, leading to a 20% decrease in sales and a total cost to the company of more than $50 million before they returned to the original design.

Summary of Learning

A successful product launch relies on the package's ability to create an emotional bond with the consumer. Simplicity is often more powerful than complex designs, and transparency regarding product facts can turn a product into a market leader. Conversely, changing too many branding elements at once can alienate loyal customers who rely on visual "reference elements" to find their preferred brands.