Working with the right plastic bag manufacturer helps you secure a reliable packaging supply while keeping your sourcing costs under control. By working directly with manufacturers, you can often reduce costs by 10–25%, shorten production and delivery timelines, and maintain consistent quality across all your orders.
This article introduces 5 plastic bag manufacturers in New Zealand that support a wide range of bag types, materials, and production volumes. These suppliers can help you choose practical, cost effective packaging solutions that align with your product requirements, order quantities, and budget.
At the end of the list, you will also find simple sourcing tips to help you compare suppliers, avoid common cost issues, and build long term partnerships that support your business growth.
1) Convex New Zealand Limited
Convex New Zealand is a well-established flexible packaging manufacturer with its head office and primary manufacturing facility located in Hamilton. Operating as a privately owned company, Convex employs approximately 145 people and supports a nationwide and trans-Tasman customer base across food, industrial, and consumer goods sectors.
With a strong emphasis on innovation and sustainability, Convex has developed a broad portfolio of flexible films and ready-made bags, including food-grade and compostable packaging solutions. Its scale, integrated production model, and established quality systems make Convex a preferred manufacturing partner for large-volume B2B buyers requiring consistency, compliance, and technical support.
Company Snapshot
- Founded: 1976
- Annual Production: Not publicly disclosed
- Expertise: Flexible packaging films, extrusion, lamination, printing, bag conversion, R&D
- Strengths: Integrated manufacturing, food-grade capability, product innovation, NZ & Australia distribution
- Certificates: HACCP (SGS), SMETA
Contact Information
- Website: https://www.convex.co.nz
- Phone: +64 7 847 5133
- Email: info@convex.co.nz
- Address: 251 Kahikatea Drive, Hamilton 3204, New Zealand
2) Plastic Bag Company Limited
Plastic Bag Company (PBC) is a Christchurch-based manufacturer specialising in plastic bags, sheets, and flexible film packaging. With more than two decades of manufacturing operations in New Zealand, the company focuses on both plain and printed packaging, serving customers that require reliable local production with short lead times and flexible order quantities.
PBC is particularly well suited to wholesalers and distributors seeking practical, cost-effective packaging solutions, including stock lines and custom-made bags. The company states that most of its manufactured products comply with US FDA and EU food-contact regulations, making it a viable option for food and agricultural supply chains where regulatory compliance is essential.
Company Snapshot
- Founded: 1991
- Annual Production: Not publicly disclosed
- Expertise: Plastic bags, sheets, and film; printed and unprinted flexible packaging
- Strengths: Short lead times, small to mid-scale custom runs, food-contact compliance support
- Certificates / Compliance: US FDA & EU food-contact compliance (product dependent)
Contact Information
- Website: https://www.pbc.net.nz
- Phone: +64 3 358 9730
- Email: office@pbc.net.nz
- Address: 570 Wairakei Road, Burnside, Christchurch 8053, New Zealand
3) Polyprint Packaging Ltd
Polyprint Packaging is a New Zealand-owned manufacturer of polythene films and plastic bags, operating two manufacturing facilities in Auckland and Tauranga. The company provides extrusion, conversion, and flexographic printing services, producing a wide range of bags and films including produce bags, liners, courier bags, flow-wrap, and form-fill-seal (FFS) film for industrial and food applications.
Polyprint is recognised for its strong quality systems and food-grade manufacturing capability. Its facilities operate under a HACCP-based system audited by SGS, and the company works extensively with customers requiring printed and customised packaging at scale. The dual-plant setup offers added capacity and operational flexibility, supporting consistent supply for wholesale and contract customers.
Company Snapshot
- Founded: 1992
- Annual Production: Not publicly disclosed
- Expertise: Film extrusion, bag conversion, flexographic printing, FFS film, liners, courier and produce bags
- Strengths: Two manufacturing sites, strong custom printing capability, food-grade focus
- Certificates: HACCP (SGS audited)
Contact Information
- Website: https://www.polyprint.co.nz
- Phone: +64 9 415 8590
- Email: sales@polyprint.co.nz
- Address (Auckland): 16D Parkhead Place, Rosedale, Auckland 0632, New Zealand
- Address (Tauranga): 4 Maleme Street, Greerton, Tauranga 3112, New Zealand
4) Flexoplas Packaging Ltd
Flexoplas Packaging is a Christchurch-based manufacturer specialising in custom plastic film and bag solutions for food, medical, horticultural, construction, and industrial applications. Operating from its Hillsborough facility, the company focuses on locally produced, specification-driven packaging where quality, consistency, and technical support are critical. Flexoplas is particularly suited to buyers who require tailored film widths, thicknesses, and printing options rather than off-the-shelf packaging.
A defining strength of Flexoplas is its long-standing commitment to quality and food safety. The company has maintained ISO 9001 certification since the late 1990s and operates a HACCP-based food safety program, making it a reliable partner for wholesalers supplying regulated or hygiene-sensitive markets.
Company Snapshot
- Founded: 1990s
- Annual Production: Not publicly disclosed
- Expertise: Plastic film extrusion, custom bags, printed and unprinted flexible packaging
- Strengths: Local manufacturing, strong quality systems, custom-focused production
- Certificates: ISO 9001, HACCP food safety program
Contact Information
- Website: https://www.flexoplas.co.nz
- Phone: +64 3 366 7568
- Email: info@flexoplas.co.nz
- Address: 10 Chapmans Road, Hillsborough, Christchurch, New Zealand
5) Davidson Plastics
Davidson Plastics is a New Zealand-owned manufacturer specialising in plastic bags, polythene tubing, and industrial film packaging, with operating sites in both Auckland and Tauranga. Established in the mid-1980s, the company supplies a wide range of standard and custom packaging formats to food, agriculture, construction, and general industrial customers across the North Island.
With two production locations and a practical, solutions-oriented approach, Davidson Plastics is well positioned to support ongoing wholesale supply programs. Its ability to produce custom sizes, formats, and specifications makes it a dependable choice for buyers who value local manufacturing and operational flexibility over highly commoditised imports.
Company Snapshot
- Founded: 1985
- Annual Production: Not publicly disclosed
- Expertise: Plastic bags, polythene tubing, industrial film packaging
- Strengths: Dual-site manufacturing, custom capability, broad industry coverage
- Certificates: Not publicly disclosed
Contact Information
- Website: https://www.davidsonplastics.co.nz
- Phone: +64 7 575 3411
- Email: Via website contact form
- Address (Auckland): 51B Druces Road, Manukau, Auckland, New Zealand
- Address (Tauranga): Tauranga, New Zealand
Final Thoughts
The plastic bag manufacturers in New Zealand (NZ) listed above offer dependable product quality, reasonable lead times, and clear communication. They are a practical option if you are focused on cost control, supply reliability, and meeting standard retail, food, and commercial packaging requirements. These suppliers are particularly suitable for small to medium order volumes that require consistent material specifications and reliable quality across production batches.
When your order quantities exceed 10,000 pieces, sourcing from more cost-competitive manufacturing countries can significantly improve your overall cost structure. By manufacturing in countries such as Vietnam, you can typically achieve 17–45% cost savings, supported by direct access to plastic resin suppliers, competitive production costs, and well-established export infrastructure. This approach helps you reduce unit costs while maintaining consistent quality and dependable delivery schedules.
K-Packings supplies plastic bags to customers in more than 30 countries, supporting high-volume programs with strict quality control and lead times of 15–25 days. Offshore sourcing becomes a practical option if you are price-sensitive, planning to scale production, or looking to diversify your supply base to maintain long-term cost stability as your business grows.
Get Free Plastic Bag Samples for Your Business
Before placing a bulk order, you can request free plastic bag samples to verify material strength, thickness consistency, printing quality, and sealing performance for your specific application. Factory visits are also available to help you reduce sourcing risks before moving into large-scale production.
You can also review reference projects and customers we have worked with, including Costco, Tony’s Fresh Market, Savers, and Harbor Freight. This hands-on verification further reduces sourcing risk and gives you greater confidence before committing to high-volume manufacturing.
Contact K-Packings
WhatsApp / Phone: (+84) 855 555 751
Email: info@k-packings.com | sale@k-packings.com
Addresses:
USA: 7319 N. Loop 1604 E, San Antonio, TX 78233, United States
Angola: Av. Pedro de Castro Van-Dúnem Loy, Luanda, Angola
Vietnam: 169 Nguyen Ngoc Vu Street, Cau Giay District, Hanoi
