Quick Specs Before You Source

• Basic stack: film face stock, pressure-sensitive adhesive, release liner.
• Main Guanma film families: PET 23-50 µm, BOPP 50-80 µm, and synthetic paper 90-120 g/m².
• Adhesive systems: hot-melt adhesive, water-based acrylic, UV-curable adhesive, removable, and repositionable options.
• Public procurement facts: MOQ from 1 ton, SEA lead time 7-14 days, A4 swatch samples, trial rolls, and in-house QC.
• Buyer checks: substrate, surface energy, temperature, print method, roll width, liner, peel adhesion evidence, and compliance flags.

Specification Numbers Worth Keeping in the RFQ

Numbers in a label-film RFQ aren’t decoration. They prevent a supplier from quoting a visually similar label stock that won’t run on the same press, fit the same applicator, or survive the same package environment.

Spec category	Number to verify	Why it changes the quote
PET film	23-50 µm	Changes stiffness, clarity, and roll yield.
BOPP film	50-80 µm	Affects label handling and film feel.
Synthetic paper	90-120 g/m2	Controls paper-like stiffness and tear resistance.
Hot-melt service range	-10 to 60°C	Flags cold-chain and heat-storage limits.
Water-based acrylic range	-20 to 80°C	Useful when aging and cleaner appearance matter.
UV-curable range	-40 to 150°C	Often asked about for demanding film-label work.
Minimum surface energy	28-31 mN/m by adhesive family	Prevents a generic adhesive callout on PE or PP.
Trial roll width	100-250 mm	Lets a converter test press, die, and liner behavior.
Swatch timing	3 business days	Supports early screening before artwork is final.
Bulk credit window	60 days	Keeps sample cost and purchase timing visible.
SEA lead time	7-14 days	Sets the baseline for regional launch planning.
Europe / South America lead time	21-28 days	Shows why approval timing matters before a launch.
US West Coast lead time	25-32 days	Forces the buyer to separate sample timing from freight timing.

If a buyer sends only “clear film label” and a label size, the supplier has to guess too much: a 23 µm PET construction, a 50 µm BOPP construction, and a 90 g/m² synthetic paper construction can all be called film-like materials, but they won’t feel, print, dispense, or age the same way on an applicator running under production pressure.

What Is Self-Adhesive Label Film?

Self-adhesive label film is a pressure-sensitive label material built with a plastic or synthetic film face stock, an adhesive layer, and a release liner. Unlike wet-glue labels, pressure sensitive adhesive labels bond when pressure is applied. That’s why material choice matters before a converter prints, die-cuts, or dispenses a roll.

In everyday buying language, label film is the film-based branch of label stock. Paper labels still fit many dry, short-life, indoor products. Film labels usually enter the discussion when the package faces moisture, squeezing, oil, refrigeration, outdoor exposure, or a no-label clear look. Mistake to avoid: treating “film” as one material. PET, BOPP, PE, PVC, and synthetic paper behave differently under print, tack, peel, and dispensing stress.

Buyer pain shows up in four patterns. The same label can pass on glass and fail on PE or PP because surface energy changes the bond. A film face stock can survive moisture while the wrong ink system still smudges in a cooler. A low-cost BOPP construction can be right for wet packaged goods but wrong for outdoor UV exposure. A supplier quote is weak when the RFQ omits liner, roll width, print method, and target substrate. Guanma’s public film range gives the buyer concrete starting points, including PET 23-50 µm, BOPP 50-80 µm, and synthetic paper 90-120 g/m², but those numbers still need to be matched against the application risk.

For Guanma customers, the commercial specification lives on the self-adhesive label film specifications page. This article is the buyer map: it explains which details should go into the first RFQ and which claims should be confirmed with samples or reports.

The 3-Layer Label Film Spec Stack

Start the first sourcing call with the 3-Layer Label Film Spec Stack. When a label fails, the visible symptom often points to the wrong layer. Smearing isn’t always a face-stock problem. Edge lift isn’t always an adhesive problem. Tearing during matrix stripping can trace back to the release liner.

ISO 28219 includes label adhesive characteristics and mark durability in its labelling scope, which is a reminder that a good label spec should cover more than artwork. It should state how the label is expected to stay readable and attached in the field.

PET vs BOPP vs Synthetic Paper: The Face Stock x Adhesive x Substrate Risk Matrix

Use the Face Stock x Adhesive x Substrate Risk Matrix as the main buyer asset in this guide. It doesn’t replace sample testing, but it gives brand owners and converters a better first shortlist.

BOPP means biaxially oriented polypropylene. PET usually refers to polyester label stock. Synthetic paper is a plastic-based paper alternative. Each can be the right answer when the RFQ connects face stock, adhesive, substrate, temperature, and print method.

Adhesive Selection: Hot-Melt, Water-Based Acrylic, UV-Curable, Removable

Adhesive selection should start with the package surface and service environment. Guanma’s public page lists hot-melt, water-based acrylic, and UV-curable adhesive families, plus removable and repositionable directions. It also lists service-temperature examples: hot-melt at -10 to 60°C, water-based acrylic at -20 to 80°C, and UV-curable at -40 to 150°C.

For food packaging labels, the buyer should also ask whether the construction needs evidence under FDA 21 CFR 175.105 or related food-contact rules. That question belongs in the RFQ because adhesive, film, print, and packaging use can change the answer.

Counterintuitive sourcing rule: a stronger adhesive is not always the right adhesive. The right adhesive is the one that meets peel, residue, temperature, and substrate requirements after the exact package has been tested.

Surface Energy: Why Some Film Labels Lift on PE and PP

Surface energy is one reason a label can pass on glass and fail on polypropylene. PE and PP are low-surface-energy plastics. In practice, that means the adhesive or ink may not wet the surface well enough without treatment, a different adhesive, or a different label construction.

QC Electronics describes corona treatment as a way to increase surface energy on low-surface-energy polymers such as polyethylene and polypropylene. It also notes that the target surface energy for adhesion should be about 8-10 mN/m higher than the surface tension of the applied ink, adhesive, or coating. Use that as a principle, not as a substitute for a test report.

Sample approval should include the real container, the real fill condition, and the real label path. If the brand owner changes from glass to PP later, repeat the test. The previous pass doesn’t transfer automatically.

Printing and Converting Fit: Flexo, Digital, Thermal Transfer, and Die-Cutting

Converters care about print face, liner release, roll width, roll length, die-cutting, and line speed. Brand owners care about color, shelf appearance, legibility, and whether the label stays attached after filling, shipping, and use. The same label film has to satisfy both sides.

• Flexo: confirm topcoat, ink system, varnish, and curing setup.
• Digital: ask whether the film surface is qualified for the press and toner or ink chemistry.
• Thermal transfer: confirm ribbon match, print durability, and abrasion needs.
• Die-cutting: check liner strength, release force, matrix stripping, and die depth.
• Dispensing: state roll width, core, roll outside diameter, line speed, and label gap.

One forum example from a bottle-label project reported peeling and smudging after cooler exposure. Practical lesson: water-resistant film isn’t enough if the print method, coating, and adhesive weren’t chosen for cold, wet handling.

Converters should also ask for a roll format that matches the press and applicator. A 100 mm trial roll can reveal matrix stripping risk, while a 250 mm trial roll may show web-tension issues closer to production. If the applicator runs 60 m/min and the test is done slowly by hand, the result can hide dispensing trouble. If a thermal-transfer ribbon is used, test abrasion after 24 hours and again after 7 days; print anchorage can look acceptable at first and fail after handling.

Test Methods Buyers Should Ask For

Buyers don’t need to become test engineers, but they should know which documents to ask for. For a converter or brand owner, a long certificate folder is less useful than evidence that the label film has been checked against the right risk.

Guanma’s public page lists ISO 9001, FDA compliance for indirect food contact, and REACH SVHC compliance claims for the self-adhesive film line. The RFQ should still ask which exact construction and document set applies to your product.

When a brand owner is comparing two suppliers that both claim peel adhesion, food-contact readiness, and restricted-substance compliance, the useful question isn’t which brochure sounds cleaner; the useful question is which supplier can connect a dated report, the exact face stock, the adhesive code, the print surface, and the final substrate in one traceable sample package.

The 12-Field Label Film RFQ Sheet

Use the 12-Field Label Film RFQ Sheet to turn a vague inquiry into a supplier-ready request. This matters because a quote without substrate, roll, and testing details often creates rework after the first sample.

Guanma can review these fields against its self-adhesive film quote request workflow. If your team doesn’t know every field yet, start with substrate, temperature, print method, and target application; those four details usually prevent the largest mismatch.

What Is Changing in Label Film Buying in 2026?

Forecast publishers expect continued growth for self-adhesive labels and label films, but that isn’t the decision point for one buyer. The buyer point is that more teams now ask for proof earlier: recyclability direction, wash-off adhesive options, restricted-substance evidence, report version dates, origin risk, and sample timing.

Patent results around wash-off pressure-sensitive adhesive for PET and recyclable label-film constructions show where technical work is active. Brand owners shouldn’t read patents as proof that every supplier has the same material ready. Read them as a clue to ask better questions: Does this construction wash off? Does it support recycling goals? Which container stream was it tested against?

The practical change for 2026 sourcing is earlier qualification. Ask for the film family, adhesive family, liner, sample path, certificate scope, and test method before artwork is locked. Later material changes can affect print color, peel adhesion, line speed, and labeling equipment.

For brand owners, earlier qualification also protects launch calendars. Samples can ship in 3 business days, but a new construction still needs internal approval, filling-line checks, and freight planning. If a buyer waits until final artwork to ask about REACH SVHC, FDA 21 CFR 175.105, roll width, or liner release, the project can lose 2-4 weeks to avoidable retesting. The safer sequence is material shortlist, A4 swatch, trial roll, converted label, then production roll.

How Guanma Fits This RFQ

Guanma manufactures self-adhesive label film, self-adhesive paper, pressure-sensitive adhesives, and release liners. Public company evidence states that Zhejiang Guanma Packaging Co., Ltd. is based in Haiyan, Zhejiang, with roots dating to Shanghai Guanma in 2010 and the Zhejiang company established in 2019. For this article, the important point is operational fit: film face stocks, adhesive systems, release liners, samples, and QC can be discussed together rather than as separate catalog lines.

That matters in a label film RFQ because face stock and adhesive aren’t independent line items. Buyers may ask for white BOPP labels, but the converter still needs liner release, die-cut depth, roll width, adhesive family, and print surface. Packaging managers may ask for durable outdoor labels, but the supplier still needs temperature range, UV exposure, substrate, and certificate flags. Better first RFQs mean fewer sample loops.

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