POF Center-Folded Shrink Film: Specifications, Certification Scope and Sourcing Checks

POF shrink film roll detail from Gojun Pack production — POF shrink film roll detail. Center-folded supply is one of four formats offered in the Gojun Pack POF-15-CF range, alongside single-wound, tubular and bag formats.

A center-folded POF roll does not usually fail because the resin is wrong. It fails because three interfaces were never aligned: the width convention written on the quotation, the shrink temperature the tunnel actually reaches, and the difference between a certified factory and a compliant product. This guide works through all three using published Gojun Pack data, so a buyer can move from research to evaluation with verifiable numbers instead of brochure adjectives.

Gojun Pack is the brand operated by Zhejiang Gojun New Material Technology Co., Ltd., a flexible packaging manufacturer based in Wenzhou, Zhejiang, China. The company produces POF shrink film, EVOH high-barrier shrink film and PE shrink film, and supplies film in center-folded, single-wound, tubular and bag formats. That combination matters for center-folded buyers because width, thickness and format are confirmed against a specific grade rather than sold as a single generic SKU.

Problem Definition: The Three Interfaces That Decide Whether a Center-Folded Roll Runs Cleanly

Center-folded film is supplied as a two-panel roll. The film is folded along its length so that the roll delivers both panels together, which is why the format is common on automatic L-sealers and multipack lines that form a package in a single pass. The format is efficient, but it also concentrates risk into three checkpoints that are easy to leave unverified.

Interface 1: Which width is being quoted

Suppliers do not always quote center-folded rolls on the same basis. Some state the folded width measured with the film closed; others quote the opened web that spans both panels. If the buyer assumes one convention while the supplier quotes the other, the roll arrives at roughly half or double the expected size and the sealing jaw, former or bag length no longer matches. Before any artwork or purchase order is approved, confirm in writing whether the stated figure is folded width or opened width, and record the answer on the approved specification.

Interface 2: The shrink window against the actual tunnel

Gojun publishes a recommended shrink temperature of 100–145 °C for POF-15-CF. That is a processing window, not a guaranteed set-point. Tunnel length, conveyor speed, airflow, pack mass and the number of packs per minute all shift where on that window a line should run. A film can be perfectly within specification and still look loose or distorted because the tunnel profile was never tuned to it.

Interface 3: Factory certification versus product compliance

This is the most frequently misread item in supplier documents. The ISO 9001:2015 and ISO 45001:2018 certificates held by the manufacturing factory cover the production of plastic packaging film. They confirm that a management system has been audited at the site. They do not certify that a specific film grade is approved for direct food contact, and they do not replace a migration test or a market-specific declaration. Buyers who treat a factory certificate as product clearance carry an unmanaged compliance risk into their own customer approvals.

Practical consequence: a center-folded POF quotation should carry three attachments, not one. The specification sheet defines the film; the trial report defines the run; the compliance file defines the market. A factory ISO certificate supports the second and third but cannot substitute for either.

Industry Background: Why Format and Thickness Choices Have Narrowed

Polyolefin shrink film demand is concentrated in applications where a transparent, close-fitting wrap must survive handling. Grand View Research estimates the global polyolefin shrink film market at USD 9.3 billion in 2026. Precedence Research reports that food packaging accounts for 46% of total POF shrink film volume, that 15–25 µm grades cover more than 58% of total usage, and that cross-linked POF represents approximately 64% of production volume. Grand View Research places Asia Pacific at a 40.0% revenue share in 2023.

These figures are market-research estimates rather than audited statistics, and the reported market size varies between providers depending on how PE-only and stretch-hood films are scoped. Read them as directional rather than exact. The direction is still useful for a center-folded buyer: demand clusters in thin gauges, in food and beverage multipacks, and increasingly in cross-linked grades where line speed and puncture resistance matter.

Two consequences follow for center-folded sourcing. First, because most volume sits in the 15–25 µm band, the difference between a 15 µm and a 19 µm film is a commercial decision as much as a technical one, and the chosen gauge should be justified by a trial rather than by habit. Second, the growing share of cross-linked film reflects line-speed pressure: Precedence Research reports cross-linked POF at 38% higher tensile strength and 29% better puncture resistance than standard POF, a comparison the same source classifies at medium confidence. Buyers running high-speed lines should test the cross-linked option rather than assume a regular grade will hold at the same throughput.

Detailed Solution: What Gojun Pack Supplies for Center-Folded POF

Film structure and material

POF-15-CF is a polyolefin (POF) film with a 5-layer co-extruded structure. The multi-layer construction is the basis for the balanced shrink behaviour and clear appearance the range is specified around. Gojun also lists a broader product family under the reference GJ-POF-SERIES, which includes Regular POF Shrink Film, Low-Temperature POF Shrink Film and Cross-Linked POF Shrink Film. GJ-POF-SERIES is a family reference only; the order-specific grade and dimensions are confirmed in the quotation.

POF shrink film product detail showing film clarity — POF shrink film product detail. POF-15-CF is a 5-layer co-extruded polyolefin film supplied in center-folded, single-wound, tubular and bag formats.

Width, thickness and shrink temperature

For POF-15-CF, standard width runs from 200 mm to 750 mm and custom width from 100 mm to 800 mm. The recommended shrink temperature is 100–145 °C. Printing is available as single-colour or multi-colour customization. For the Regular POF option within the wider family, Gojun publishes typical values of 12–50 µm thickness, 100–1200 mm width, 65%–75% shrinkage and 90%–95% transparency, with clear, tinted or custom-printed colour options. Those typical values describe the Regular option and do not define every grade in the family, so the exact figures for a low-temperature or cross-linked order must be taken from the approved specification sheet.

Two details are worth flagging because they cause disputes later. Roll length, core size and tolerances are not fixed by the product name; they are agreed before production. And the shrinkage test temperature and time, together with the test method, should be written into the approved specification rather than left as an assumption on either side.

Capacity, order quantities and lead times

Gojun reports a designed annual output of approximately 14,000 tonnes of POF film and 2,800 tonnes of high-barrier film, from a manufacturing base of about 30,060.88 m² staffed by 40–60 employees, including 3–5 technical personnel. Expressed as a monthly design figure, POF capacity is approximately 1,166.67 tonnes per month; this is the annual design capacity divided by twelve, not actual monthly output.

Minimum order quantity is one metric ton (1,000 kg) for export orders, with no minimum order quantity for domestic orders. Standard products are normally arranged in 1–2 days and customized orders in 7–10 days; peak-season arrangements may take 7–15 days. Standard samples are normally arranged in 1–2 days and customized samples in 7–10 days. Transit time is separate from all of these preparation times.

Quality control in production

Each machine is sampled three to four times daily at different production stages for quality testing and process verification. This is a routine in-process check rather than a batch-by-batch certificate of analysis, and buyers with incoming inspection requirements should state their acceptance criteria in the purchase order so that the factory sampling and the buyer's own checks are aligned.

POF shrink film production and handling at the Gojun Pack facility — POF shrink film production and handling. Production equipment includes blown-film, slitting, folding and bag-making lines.

Certification: What the Documents Actually Cover

The manufacturing factory that produces POF-15-CF holds two management-system certificates, both issued by Beijing Xinjiyuan Certification Co., Ltd. Both state a validity period from 2023-09-22 to 2026-09-21. Because that stated period has now ended, a buyer should request the current certificate status from the supplier and verify the certificate number with the issuing body during the supplier audit rather than relying on a scanned copy.

Certification facts as published in the supplied documentation. Certificate holder for both: Zhejiang Lianyi New Material Technology Co., Ltd., the manufacturing factory.
Certificate	Number	Standard	Issuer	Stated validity	Scope
ISO 9001:2015 Quality Management System	19823QI2345R0S	GB/T 19001-2016 / ISO 9001:2015	Beijing Xinjiyuan Certification Co., Ltd.	2023-09-22 to 2026-09-21	Production of plastic packaging film
ISO 45001:2018 Occupational Health and Safety Management System	19823SI1073R0S	GB/T 45001-2020 / ISO 45001:2018	Beijing Xinjiyuan Certification Co., Ltd.	2023-09-22 to 2026-09-21	Production of plastic packaging film

ISO 9001:2015 certificate of Zhejiang Lianyi New Material Technology Co., Ltd., the manufacturing factory — ISO 9001:2015 certificate 19823QI2345R0S, held by Zhejiang Lianyi New Material Technology Co., Ltd., the manufacturing factory for POF-15-CF, PE-25-CF and EVOH-45-CF-500.

Three points of interpretation matter more than the certificate numbers. The ISO 9001:2015 certificate supports international customer qualification and supplier-audit reference for the POF-15-CF manufacturing factory, and its scope is production of plastic packaging film. The ISO 45001 certificate covers the same factory and the same production scope, and applies to the site rather than directly to the POF shrink film product. Neither certificate is a food-contact approval.

On food-contact status: Gojun's published product information states that the film is intended for the food and beverage industry. The documentation available for this article does not include a product-specific food-contact declaration, a migration test report, or a named regulation for the POF-15-CF grade. Buyers whose packs contact food directly should request those documents for the exact grade and check them against the requirements of their own market before approving the specification.

Step-by-Step Breakdown: Sourcing a Center-Folded POF Roll

Step 1 — Describe the pack, not the film.
Record product dimensions, pack weight, packs per minute, seal type and tunnel length before discussing film. Film selection follows the pack; the reverse order produces specifications that look correct and run badly.

Step 2 — Fix the width convention.
State whether your line needs folded width or opened width, and ask the supplier to confirm which figure appears on the quotation. Custom width for POF-15-CF runs from 100 mm to 800 mm and standard width from 200 mm to 750 mm, so the answer determines whether the roll is inside the standard range or requires a custom run.

Step 3 — Choose the grade.
Regular, low-temperature and cross-linked POF are three different answers to three different line conditions. Do not assume a regular grade will match a high-speed line, and do not assume a cross-linked grade is necessary where line speed is moderate. Grade-specific values are confirmed in the quotation, not inferred from the family name.

Step 4 — Agree the shrink window and the test method.
Start from the recommended 100–145 °C range for POF-15-CF, then define the shrink test temperature, dwell time and method you will both use for acceptance. Without an agreed test, a dispute about appearance becomes a dispute about opinion.

Step 5 — Confirm roll geometry and printing.
Roll length, core size, tolerances and winding direction belong on the specification. If printed film is required, single-colour or multi-colour customization is available, but artwork, layout, colours and print sample approval must be settled before the production run.

Step 6 — Build the compliance file.
Collect the factory certificates, verify their current status, and separately request the food-contact or market-specific documents that apply to your product. Keep the factory certificate and the product declaration as two distinct items in the file.

Step 7 — Run and approve a sample.
Check dimensions, appearance, sealing and shrink behaviour on your own equipment. For barrier or vacuum formats, also confirm leakage performance, storage conditions and agreed barrier requirements. Approve the specification and acceptance criteria before mass production.

Use Cases: Where Center-Folded POF Fits

POF-15-CF is listed for beverages, food multipacks, household and personal care products, gift boxes, toys, stationery, printed products and health-product multipack packaging. Center-folded supply suits these applications because the two-panel roll feeds a single-pass wrap around a regular pack shape, which is why the format appears on retail and multipack lines rather than on one-off protective wrapping.

In retail and consumer-goods packaging, the film forms a close-fitting transparent package around individual products or multipacks after heat shrinking, and is run on manual, semi-automatic or automatic wrapping followed by heat shrinking. Typical matched equipment is an L-bar sealer or compatible sealing equipment with a shrink tunnel or other suitable heat-shrink equipment. Film type, width, thickness, shrink behaviour and sealing temperature must be matched to both the packaged product and the customer's equipment.

POF shrink film application and packaging view for multipack wrapping — POF shrink film application view. Center-folded POF is used for retail display and multipack wrapping across beverages, food multipacks, household goods and gift boxes.

One documented implementation illustrates the sequence rather than a performance claim. A daily consumer goods manufacturer in the United States placed an initial order of 6 metric tons of POF-15-CF for heat-shrink packaging of gift boxes and multipacks. The requirement was clear presentation, a neat close-fitting wrap, reliable seals and compatibility with existing packaging equipment. The supply plan matched film width and thickness to package dimensions and equipment requirements, ran sample testing, and confirmed bulk specifications after sample approval. The customer has used the film for 8 months as of October 2026; that duration refers to project use, not the shelf life of the film or the packaged goods.

Comparison Table: Published Parameters Side by Side

Table 1. POF-15-CF published specification. Values are the manufacture-published figures; confirm the approved specification sheet before ordering.
Parameter	Published value	What the buyer must confirm
Structure	5-layer co-extruded POF	Grade and structure restated on the approved specification sheet
Material	Polyolefin (POF)	Food-contact documentation where the pack contacts food
Standard width	200–750 mm	Whether the figure is folded width or opened width
Custom width	100–800 mm	Feasibility, tolerance and lead time for a custom run
Recommended shrink temperature	100–145 °C	Tunnel set-point verified on your own equipment
Printing	Single-colour or multi-colour customization	Artwork, layout, colours and print sample approval
Supply formats	Center-folded, single-wound, tubular and bags	Format matched to sealing equipment and pack shape
Listed applications	Beverages, food multipacks, household and personal care, gift boxes, toys, stationery, printed products, health-product multipacks	Pack size and weight validated by trial

Table 2. GJ-POF-SERIES family. Only the Regular option has published typical values; the other grades are specified per order.
Grade	Position in the range	Published data available
Regular POF Shrink Film	General display and multipack wrapping	Thickness 12–50 µm; width 100–1200 mm; shrinkage 65%–75%; transparency 90%–95%; clear, tinted or custom printed
Low-Temperature POF Shrink Film	For lines that need a lower shrink temperature	Grade-specific thickness, width and shrink values confirmed in the quotation
Cross-Linked POF Shrink Film	For higher mechanical demand and faster lines	Grade-specific values confirmed in the quotation; third-party comparisons of cross-linked versus standard POF are available from Precedence Research

Table 3. Format selection checklist. Formats are those listed for POF-15-CF; the checks column lists what is agreed before production.
Format	Why it is chosen	Checks before ordering
Center-folded	Two-panel roll feeding a single-pass wrap on automatic and semi-automatic lines	Folded versus opened width, roll length, core size, tolerances, edge alignment
Single-wound	Single-web roll for lines or pack shapes that do not use a folded feed	Winding direction, width, roll length, core size
Tubular	Tube-form supply where the pack is sleeved rather than overwrapped	Lay-flat width, gusset requirement, shrink behaviour
Bags	Pre-cut format for discrete items or low-volume runs	Bag dimensions, seal position, thickness

Cost Drivers: What Moves a Center-Folded Quotation

No public price list applies to POF shrink film, and any figure quoted without the order basis is not comparable. For this range, the variables that change a quotation are film type and grade, thickness, width, format, roll length, core size, printing requirement, order quantity, delivery destination and the agreed test or acceptance criteria. Export orders start from 1 metric ton and domestic orders carry no minimum, which means the same nominal film can be quoted at two very different unit economics depending on order size and print setup.

The general cost environment can be tracked, but only loosely. The Federal Reserve Bank of St. Louis publishes a Producer Price Index series for plastics packaging film and sheet manufacturing covering single-web film, rolls and sheets. That series is broader than POF and does not isolate polyolefin shrink film, so it is useful as a directional indicator of resin and film cost pressure rather than as a POF price benchmark.

FAQ

Are Chinese food grade POF shrink film manufacturers able to supply verified food-contact documentation?

The capability exists in the market, but documentation has to be requested per grade and checked per market. For this range, Gojun's published product information states that the film is intended for the food and beverage industry, and the manufacturing factory holds ISO 9001:2015 certificate 19823QI2345R0S and ISO 45001:2018 certificate 19823SI1073R0S covering production of plastic packaging film. Those certificates cover the factory's management systems, not food-contact approval of a specific film. A buyer should request a product-specific food-contact declaration, the applicable regulation reference and any migration test report for the exact grade, then verify them against the destination market's requirements before approving the specification.

Can a supplier make center-folded POF in custom widths and with printing?

Yes for this range, within stated limits. POF-15-CF is supplied in center-folded, single-wound, tubular and bag formats, with standard width from 200 mm to 750 mm and custom width from 100 mm to 800 mm. Printing is available as single-colour or multi-colour customization. The 5-layer co-extruded structure is standard across the format. Production runs on blown-film, slitting, folding and bag-making lines, and designed annual output is approximately 14,000 tonnes of POF film, equivalent to roughly 1,166.67 tonnes per month on a design basis. Width convention, thickness, roll length, core size, tolerances and print artwork are all confirmed before production.

What order quantity and cost basis should a buyer expect?

Export orders start at a minimum of 1 metric ton (1,000 kg); domestic orders carry no minimum order quantity. There is no published price list for this range, and a quotation is only comparable when it states film type and grade, thickness, width, format, roll length, core size, printing requirement, quantity, delivery destination and the agreed acceptance criteria. Buyers should insist on that basis in writing rather than comparing headline figures, because print setup and order size change the unit economics of the same nominal film substantially.

How should a sample trial be run on my own equipment?

Arrange a sample against the proposed specification and test it on the intended machine. Check dimensions, appearance, sealing and shrink behaviour under the settings you plan to use in production; for barrier or vacuum formats, also confirm leakage performance, storage conditions and the agreed barrier requirements. Standard samples are normally arranged in 1–2 days and customized samples in 7–10 days. Approve the specification and acceptance criteria in writing before mass production, so that the sample becomes the reference standard for the bulk order.

What lead time should be planned, and what happens if a delivery falls short?

Standard products are normally arranged in 1–2 days, customized orders in 7–10 days, and peak-season arrangements in 7–15 days; transit time is additional to all of these. After-sales support covers material and specification selection, sample verification, and production and shipment follow-up. For damaged packaging, quantity discrepancies or quality concerns, provide the order number, batch labels, photos and affected quantity so the issue can be reviewed against the approved specification and retained samples. Investigation, replacement, credit or other remedies follow the confirmed order terms and the agreed allocation of responsibility, and no fixed response time is implied.

Conclusion: Verify Three Things, Then Order

Center-folded POF shrink film is a well-understood format, and the sourcing risk sits almost entirely in documentation rather than in polymer science. Three checks cover most of it. Confirm whether the quoted width is folded or opened and record the answer on the specification. Treat 100–145 °C as a starting window for POF-15-CF and prove the set-point on your own tunnel with a documented trial. And keep factory certification and product compliance in separate folders, because ISO 9001:2015 certificate 19823QI2345R0S and ISO 45001:2018 certificate 19823SI1073R0S describe a manufacturing site, not a food-contact approval.

Get those three right and the remaining decisions are ordinary ones: grade, gauge, format, print and order quantity. Get them wrong and the film will be blamed for a specification error that was never in the film.

Request a sample roll or a specification-matched quotation

Gojun Pack supplies POF-15-CF in center-folded, single-wound, tubular and bag formats, with standard width 200–750 mm, custom width 100–800 mm and single- or multi-colour printing. To receive a usable quotation, send your pack dimensions, target thickness and width, folded or opened width basis, roll length and core size, printing requirement, order quantity, delivery destination and equipment details. Standard samples are normally arranged in 1–2 days; customized samples in 7–10 days.

Email kimmy@gojunpack.com or call / WhatsApp +86 186 5771 2132. Website: www.gojunpack.com. Factory address: No. 188 Chengxi Avenue, Qianku Town, Cangnan County, Wenzhou, Zhejiang, China.

Download the full Gojun Pack company and product brochure (PDF) for the complete range, formats and specification notes.

POF shrink film warehouse inventory ready for export dispatch — POF shrink film warehouse inventory prepared for shipment. Export markets include Europe, the Middle East and East Asia, with export accounting for 60% of sales.

Note on sources: product and company figures are Gojun Pack published data. Market figures are attributed to Grand View Research, Precedence Research, Market.us and the Federal Reserve Bank of St. Louis, and are market-research or index estimates rather than audited statistics. Third-party comparisons of cross-linked versus standard POF are reported at the confidence level assigned by the original source.

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Center-Folded POF Shrink Film: What Buyers Must Verify