Low-surface-energy film additives cannot replace correct film identification, cleaning or corona/plasma/flame treatment. First measure the treated surface and prove adhesion of the complete ink, coating, adhesive or laminate. Then screen wetting routes within their documented water, solvent or UV boundaries.
Polymer, additives, side and age.
Clean, activate and measure.
Wetting, adhesion, rub, block and bond.
Define the film and use
Record PE, PP, PET or other polymer and grade; film side; slip, antiblock and antistatic additives; recycled content; treatment type and power; treatment-to-coat delay; storage; coating/ink/adhesive chemistry; printing and drying; and lamination or sealing. Surface behavior can drift as additives bloom or treatment decays.
Measure treatment without calling it adhesion
ASTM D2578 measures wetting tension of polyethylene and polypropylene films with specified solutions. Its scope warns that wetting tension is not a complete measure of adhesion. Use it only on applicable films and correlate the result with the actual coated or printed stack.
Separate the evidence boundaries
| Rota | Published facts | Eligible first use | Boundary |
|---|---|---|---|
| 3071 | 0.1–1%; water/solvent/UV; surface tension <25 mN/m | Broad wetting screen after treatment | May stabilize foam; wetting is not adhesion |
| 2100 | Two live records show similar 100% active, 0.1–1% facts | Only after exact identity is confirmed | CHLUMIAG® vs CHLUMIWE® record conflict |
| FS-D8975BR | 70% active in dibasic ester; 0.05–0.8% | Solvent/UV anti-cratering screen | Not waterborne; no foam inhibition |
Use 3071 for a measured wetting deficit
3071 may be added during grinding, stirring or later. Screen it only after the correct film side is clean and treatment is controlled. Measure coverage, pinholes, print density or coating weight and adhesion. Its page states that it may stabilize foam in waterborne systems, so track wet density and microbubbles.
Resolve the two 2100 identities first
Two live product records conflict in brand identity: CHLUMIAG®2100 e CHLUMIWE®2100. Both currently show closely matching composition, 100% active content, 0.1–1.0% dosage and water/solvent/UV applicability, but the brand-family conflict means the exact commercial identity is not controlled.
Before a sample or formula is specified, obtain the exact product code, signed current TDS, SDS and batch COA. Do not merge the records or assume interchangeability from similar webpage text.
Restrict FS-D8975BR to solvent and UV
FS-D8975BR is a 70% active fluorocarbon copolymer solution in dibasic ester, recommended at 0.05–0.8%. Its page lists solvent-based and UV systems, not waterborne systems. It may be screened for long-wave leveling, orange peel or anti-cratering in those eligible systems and can be added at any stage.
The page states no foam inhibition. Include the carrier in VOC, drying, residual solvent, migration and compliance review. Do not treat fluorocarbon chemistry as automatic permission for packaging or food-contact use.
Use a film-by-treatment matrix
| Stage | Variants | Primary measure | Stop gate |
|---|---|---|---|
| Surface | Film grade × treatment × age | Wetting tension/contact angle and coverage | Treatment drifts before coating |
| Broad wetting | 3071 low/mid/high | Coverage, foam, pinholes | Adhesion or bond declines |
| 2100 | Only after identity documents | Defined wetting/print response | Commercial identity unresolved |
| Solvent/UV | D8975BR low/mid/high | Crater and orange peel | Waterborne system or compliance gap |
Test adhesion, rub and lamination
Use a substrate-appropriate adhesion or peel method agreed with the customer. ASTM D5264 provides a comparative Sutherland rub practice for printed material; specify receptor, load, cycles and conditioning. For laminates, test final bond and aging rather than relying on ink adhesion alone.
Repeat after aging and production handling
Recheck treated film after the maximum storage delay, and test start, middle and end of the roll. Include blocking, coefficient of friction, heat sealing, overprint, adhesive and lamination operations. A wetting improvement that harms seal or laminate bond is a failure.
Distinguish wetting from retention
Record the wet film immediately after application and the dry film after conditioning. Beading, crawling, pinholes, weak rub and adhesive delamination are different results. A liquid may spread because its surface tension is lower yet still fail to anchor to the polymer. Report coating weight or print density beside adhesion and rub so a thinner transferred film is not mistaken for weak chemistry.
Control treatment decay and film blooming
Test freshly treated film and film stored for the maximum expected delay. Repeat after heat aging where slip or antiblock additives may migrate to the surface. Track film side and roll position. If wetting tension or bond varies across the roll, correct the treatment or substrate supply before escalating additive dose.
Check drying and residual carrier
Hold dryer temperature, air balance, line speed and coating weight constant. For solvent or UV routes, verify residual solvent or cure with the agreed method. D8975BR’s dibasic-ester carrier and any diluent must be included in drying, odor, migration and laminate-bond evaluation.
Run a production-relevant repeat
Repeat the winning formula from a fresh batch at normal line speed. Sample startup, steady state and run end. Retain untreated, treated-control and additive specimens. Recheck print, rub, block, seal and laminate bond after the customer’s aging interval before approving the change.
Decision rules
- Treat and measure the exact film first.
- Use 3071 while monitoring foam and adhesion.
- Do not specify 2100 until the two records are resolved.
- Use D8975BR only in solvent/UV systems with compliance review.
Information to send
Provide film polymer/grade/side, additive package, treatment and age, coating/ink/adhesive chemistry, process and dryer, first defect and limits for wetting, adhesion, rub, block, friction, sealing, laminate bond and compliance.
Ask Longchang for a film-specific wetting study with exact product identity.