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Overview of Poly and Plastic Packaging Bags
Plastic and poly bags are commonly used for packaging, storage, and shipping a wide variety of products. These versatile bags provide many benefits for protecting items and reducing costs. This article provides an overview of the different types of plastic and poly bags and their key characteristics.
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Types of Poly and Plastic Packaging Bags
There are several major types of plastic and poly bags:
- Polyethylene (PE)
- Low Density Polyethylene (LDPE) - flexible, translucent, tough
- High Density Polyethylene (HDPE) - stiffer, more durable
- Polypropylene (PP) - resistant to acids, grease, and solvents
- Poly Vinyl Chloride (PVC) - clear, glossy finish
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Key Properties and Characteristics
Poly and plastic bags have the following notable properties:
| Property | Description |
|---|---|
| Strength | Good tensile strength; puncture and tear resistant |
| Barrier | Provide barrier against water, oxygen, and aromas |
| Clarity | Many types are transparent and glossy when unprinted |
| Durability | Withstand wear and pressure; some types resistant to chemicals |
| Cost | Relatively inexpensive compared to other packaging options |
Major Applications
Poly and plastic bags are extensively used for:
- Retail packaging - bags, pouches, wraps
- Food storage and packaging
- Shipping and warehouse storage
- Garbage, waste disposal bags
- Product and part protection
With a wide selection of sizes, thicknesses, and properties, poly and plastic bags can be customized to meet the specific needs of almost any application. They provide an efficient and cost-effective way to protect, store, and transport products.
Benefits of Using Poly and Plastic Packaging Bags
Poly and plastic packaging bags offer many advantages that make them a versatile choice for a range of applications. Some key benefits include:
Cost-Effective
Poly and plastic bags are inexpensive compared to other packaging options. The raw materials and production processes allow low per-unit costs. This makes them ideal for high volume uses.
Lightweight
These bags are lightweight, which helps reduce shipping costs. This table compares weights:
| Material | Weight |
|---|---|
| Plastic bag | 3-5 grams |
| Paper bag | 20-25 grams |
Strength and Durability
Poly and plastic films provide good tensile strength and puncture resistance. Bags maintain integrity for handling and transport.
Barrier Properties
The materials serve as barriers against:
- Oxygen and water vapor
- Aromas and oils
- Dust and dirt
This preserves freshness and prevents contamination.
Customizable
Bags can be tailored with:
- Different thicknesses and opacities
- Additives for strength or other properties
- Range of sizes and dimensions
- Printing and labeling options
Reusable and Recyclable
Some poly and plastic bags are designed for multiple uses. They are also recyclable in many curbside and retail programs.
Wide Applications
Poly and plastic bags can package, store, and transport:
- Food
- Consumer goods
- Industrial items
- Waste and garbage
Their versatility enables widespread use across many industries and settings.
Convenience
These bags are easy to use with handles and seals. They provide convenience for businesses and consumers alike.
With their array of advantageous properties, it is clear poly and plastic bags will continue to be a packaging staple for the foreseeable future.
Types of Poly and Plastic Packaging Bags
There are several major categories of plastic and poly bags used for packaging applications:
Polyethylene (PE)
Polyethylene is the most common plastic film used for bags. Key types include:
- Low Density Polyethylene (LDPE) - Flexible and translucent with good tear resistance. Often used for food storage bags and dry cleaning bags.
- High Density Polyethylene (HDPE) - Stiffer material with higher tensile strength. Grocery bags and cereal box liners are made from HDPE.
Polypropylene (PP)
Polypropylene bags provide high strength, chemical resistance, and barrier properties. Some uses are:
- Food packaging bags for snacks, frozen foods, and fresh produce
- FIBC (Flexible Intermediate Bulk Container) woven bags for industrial goods
- Medication and medical supply packaging
Poly Vinyl Chloride (PVC)
PVC bags have clarity, gloss, and good stability. Common applications include:
- Packaging for small consumer goods
- Bags for grouping food like candy and nuts
- Tamper-evident security bags
Nylon
Nylon bags provide high strength and durability. Key uses are:
- Protective covers and cases for tools, cameras, electronics
- Outdoor and travel bags
- Garment bags for suits and dresses
Biodegradable Polymers
Biodegradable plastic bags help reduce environmental impact. Materials include:
- PLA - Made from plant starches like corn, potato, sugarcane
- PBAT - Polybutylene adipate terephthalate plastic
- PHA - Polyhydroxyalkanoates from microbial fermentation
With such a wide range of poly and plastic bag materials, manufacturers can select optimal properties for their specific packaging needs.
Polyethylene Bags
Polyethylene (PE) is the most common plastic used to make bags and packaging films. The two main types of polyethylene bags are low density polyethylene (LDPE) and high density polyethylene (HDPE).
Low Density Polyethylene (LDPE)
LDPE bags are made from a branched polymer structure, giving them these properties:
- Translucent and flexible
- Tough, puncture and tear resistant
- Good chemical stability
- Sealable to provide airtight enclosure
Common applications of LDPE bags include:
- Food storage bags
- Frozen food bags
- Clothing dry cleaning bags
- Flexible packaging films
High Density Polyethylene (HDPE)
HDPE has a linear polymer structure, providing these characteristics:
- Good tensile strength
- Low permeability to moisture
- Stiffness and opacity
- Withstands higher temperatures than LDPE
Typical uses of HDPE bags:
- Grocery bags
- Retail shopping bags
- Cereal box liners
- Bulk chemical and food storage
Advantages of Polyethylene Bags
Reasons polyethylene bags are highly utilized for packaging:
- Low cost
- Lightweight
- Strong and durable
- Good barrier against moisture and air
- Ability to print logos, labels, and graphics
- Recyclable
With properties to suit both low and high stress applications, polyethylene provides an efficient packaging solution across many industries.
Low Density Polyethylene (LDPE)
Low density polyethylene (LDPE) is a thermoplastic made from the polymerization of ethylene. It has a branched polymer structure and lower crystallinity than high density polyethylene (HDPE).
Properties of LDPE
- Flexible and stretchy
- Translucent with high impact strength
- Good chemical resistance
- Excellent optical properties for clarity
- Sealable for air-tight and water-tight enclosures
Manufacturing Process
LDPE is manufactured at low pressures using free radical initiators. The branching occurs through random side chain formation during polymerization. This results in LDPE's low density and high molecular entanglement.
LDPE Grades
LDPE is available in different grades optimized for:
- Film extrusion
- Injection molding
- Blow molding
Additives can modify properties like anti-static, UV resistance, and opacity.
Applications of LDPE
Major uses of low density polyethylene include:
- Plastic bags and films
- Food storage containers and bags
- Flexible bottles and packaging
- Wire and cable insulation
- Squeeze bottles
- Garment bags
LDPE provides an excellent balance of flexibility, clarity, and chemical inertness for cost-effective packaging and consumer products.
Advantages of LDPE
- Low cost
- Easy processing
- Lightweight
- Versatility
- Recyclability
The beneficial properties of LDPE make it useful across many industries from food packaging to membranes and medical tubing.
High Density Polyethylene (HDPE)
High density polyethylene (HDPE) is a thermoplastic polymer made from the monomer ethylene. It has a linear structure with minimal branching, giving it a higher density and different properties than low density polyethylene (LDPE).
Properties of HDPE
- High tensile strength and stiffness
- Chemical and abrasion resistance
- Low permeability to moisture and gases
- Withstands high temperatures up to 120°C
- Opaque appearance
Manufacturing Process
HDPE is synthesized using Ziegler-Natta or metallocene catalysts at low pressure. The lack of branching results in stronger intermolecular forces and higher crystallinity.
HDPE Grades
Different grades of HDPE are available for uses like:
- Blow molding containers
- Injection molding caps and closures
- Films for packaging
- Extrusion pipes and tubing
Applications of HDPE
HDPE is commonly utilized for:
- Milk and water jugs
- Detergent and oil bottles
- Grocery bags
- Toys, buckets, crates
- Gas tanks and chemical storage
Advantages of HDPE
- Excellent chemical resistance
- Low moisture absorption
- Good tensile strength
- Hardness and heat resistance
- Low cost
The beneficial properties of HDPE make it suitable for a wide range of packaging and household applications.
Using Amazon Prime to Purchase Poly & Plastic Packaging Bags
Amazon Prime provides a convenient way to buy all kinds of products, including poly and plastic packaging bags. Here are some tips on using Amazon Prime to purchase quality bags for your business or personal needs:
Search for Bags
Use the Amazon search bar to find the specific type of packaging bags you need. Search terms like "plastic bags wholesale" or "poly mailers" will bring up relevant results.
Filter by Prime Eligibility
Once you get search results, filter by checking the "Prime Eligible" box. This ensures you only see items available for fast, free Prime shipping.
Select Bag Features
Use filters on the left side of the search page to narrow down bags by properties like material, size, type (bags, sheets, tubing), closure type, and opacity. This makes it easy to find the perfect bags.
Compare Prices
Amazon shows you the per unit price so you can calculate and compare the total cost for the quantity you need. Buying in bulk usually provides the best value.
Check Reviews
Read ratings and reviews from other customers to evaluate real-world quality and performance before purchasing. Sort by recent reviews for the best feedback.
Find Add-On Deals
Check suggested add-on items on bag product pages to get good deals on related supplies like ties, tape, dispensers and bag sealers.
Use Prime Benefits
As a Prime member, get free one-day or two-day shipping on eligible bags. You also have access to Prime customer service for any order issues.
With its huge selection and convenient service, Amazon Prime is a great way for businesses and individuals to purchase quality poly and plastic packaging bags.
Tamper Evident Poly And Plastic Packaging Bags Wholesale
If you're looking to buy tamper-evident poly and plastic packaging bags wholesale, there are several options available to you. Here are some possible sources:
- Universal Plastic Bags: This company offers a wide range of tamper-evident bags in various styles and sizes, with gauges of 1.5 mil to 3.0 mil. They meet FDA and USDA requirements for use with food products, and they can be custom printed to suit your brand and product. They offer tamper-evident bags for use in the food industry, medical and pharmaceutical industries, airports, and law enforcement.
- Four Star Plastics: This company offers reclosable tamper-proof bags that are bottom-loading and sealed with a heat sealer. They are available in various sizes and can be reused due to their zip-top functionality after the perforated strip is removed. They meet FDA and USDA specifications for food contact and are loaded from the bottom and then heat-sealed. They also offer custom tamper-proof bags with logo, branding, or special messaging.
- Universal Plastic Bags: This company offers tamper-evident bottom-load pouches that are available at a special price. They are made from high-quality materials and are designed to provide maximum protection for your products during shipping and handling.
- Four Star Plastics: This company offers custom tamper-proof clear poly bags with zip-top and bottom-loading features. They can be customized to meet the needs of your unique application, with custom sizes, gauges, printing, and other features available. They meet FDA and USDA specifications for food contact and are available with or without custom printing.
- Discount Plastic Bags: This company offers a wide range of plastic bags for packaging and shipping, including tamper-evident bags. They offer custom sizes and printing, with lightning-fast delivery.
- Alibaba: This website offers a range of wholesale tamper-proof plastic bags in various sizes and styles. You can find plastic bags for storage needs for large products and miniature products.
These are just a few possible sources for tamper-evident poly and plastic packaging bags wholesale. Be sure to compare prices, features, and customer reviews before making a purchase.
Wholesale Tamper Evident Poly And Plastic Packaging Bags Usa
If you're looking to buy tamper-evident poly and plastic packaging bags wholesale in the USA, here are some possible sources:
- Universal Plastic Bags: This company offers a wide range of tamper-evident bags in various styles and sizes, with gauges of 1.5 mil to 3.0 mil. They meet FDA and USDA requirements for use with food products, and they can be custom printed to suit your brand and product.
- Four Star Plastics: This company offers reclosable tamper-proof bags that are bottom-loading and sealed with a heat sealer. They are available in various sizes and can be reused due to their zip-top functionality after the perforated strip is removed. They meet FDA and USDA specifications for food contact and are loaded from the bottom and then heat-sealed. They also offer custom tamper-proof bags with logo, branding, or special messaging.
- Discount Plastic Bags: This company offers a wide range of plastic bags for packaging and shipping, including tamper-evident bags. They offer custom sizes and printing, with lightning-fast delivery.
- Plastic Bag Manufacturers: This company offers tamper-evident bags in various forms, such as envelopes, pouches, or plastic bags, and they are made using a range of materials, including paper, polyethylene, or polypropylene. They also offer clear tamper-evident bags that are made from transparent materials, such as polyethylene or polypropylene.
These are just a few possible sources for tamper-evident poly and plastic packaging bags wholesale in the USA. Be sure to compare prices, features, and customer reviews before making a purchase.
