| HS Code | 123778 |
| Product | Adfil Sinta F19 - Fibrillated Synthetic Micro-Fiber |
| Material | 100% virgin polypropylene |
| Fiber Type | Fibrillated synthetic micro-fiber |
| Fiber Length | 19 mm |
| Fiber Diameter | Approx. 0.05 mm |
| Aspect Ratio | Approx. 380 |
| Specific Gravity | 0.91 g/cm³ |
| Tensile Strength | Approx. 350 MPa |
| Elastic Modulus | Approx. 3.5 GPa |
| Melting Point | 160-170 °C |
| Ignition Point | >360 °C |
| Alkali Resistance | Excellent |
| Acid Resistance | Excellent |
| Water Absorption | Nil |
| Dosage | 0.9 kg/m³ typical for concrete |
| Packaging | 0.6 kg bags |
| Colour | Natural/white |
As an accredited Adfil Sinta F19 - Fibrillated Synthetic Micro-Fiber factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Adfil Sinta F19 is supplied in 600 g water-soluble bags, with 20 bags per 12 kg carton for easy dosing. |
| Container Loading (20′ FCL) | 20′ FCL loading: Adfil Sinta F19 fibrillated synthetic micro-fiber, palletized, shrink-wrapped, and securely stowed inside dry container for ocean transport. |
| Shipping | Adfil Sinta F19 – Fibrillated Synthetic Micro-Fiber is transported as a non-hazardous, non-DG material, typically in moisture-resistant bags on pallets. Keep dry, avoid punctures, and store away from ignition sources. Standard freight applies; no special transport classification required. Always follow the SDS and local shipping regulations. |
| Storage | Store Adfil Sinta F19 in its original, unopened packaging in a cool, dry, well-ventilated area. Protect from moisture, direct sunlight, and extreme temperatures. Keep away from ignition sources, dust, and incompatible chemicals. Do not expose to open flame. Stack pallets securely to prevent package damage or collapse. Maintain good housekeeping and follow local regulations and supplier guidance. |
| Shelf Life | Typically 12 months when stored in original unopened packaging, in a dry, cool place, away from direct sunlight and moisture. |
In cast-in-place industrial floor slab production, Adfil Sinta F19 is introduced at a dosage of 0.6 kg/m³ to 0.9 kg/m³ into twin-shaft compulsory batch mixers. The fiber is dry-charged after the coarse and fine aggregate fraction, before cementitious binder addition, to prevent hydrophobic bundle agglomeration. Mixing continues for an additional 60–90 seconds after all fractions are charged. The effect on fresh-state rheology is measurable but reversible: a slump reduction of 10–25 mm under EN 12350-2:2019 occurs at the upper dosage, requiring a polycarboxylate ether high-range water reducer at 0.2–0.4% by cement mass to restore the target consistency. Plastic shrinkage cracking is evaluated by ASTM C1579-21; published independent data for fibrillated micro-fibers at 0.9 kg/m³ commonly show crack-area reduction above 80% relative to plain controls. The material is specified as Type III synthetic fiber-reinforced concrete under ASTM C1116/C1116M-10a and is required to meet EN 14889-2:2006 for polymer fibers in concrete. Field-scale failure modes are dominated by balling when bags are discharged simultaneously with cement into high-shear vertical shaft mixers; pre-dispersal in the aggregate fraction is mandatory at fiber dosages above 0.8 kg/m³. The finished element is a large-format industrial slab with sawn joint spacing determined by shrinkage and curling analysis. Sinta F19 does not replace structural reinforcement and does not alter hardened-shrinkage crack control at joint positions.
Wet-mix sprayed concrete for temporary rock support in tunnel headings operates with a maximum aggregate size of 8 mm and is placed through piston or rotor/stator pumps at air-assisted nozzle velocities sufficient to compact the layer. Adfil Sinta F19 is added at 1.0 kg/m³ to 1.5 kg/m³ to reduce rebound and control plastic shrinkage in thick immediate-support layers. The fibrillation network increases the yield stress of the pumped mix; this is observed as a pump pressure rise of 5–10% at the upper dosage when using 50 mm internal diameter delivery lines. Rebound measurements on tunnel rock-support operations have shown reductions from above 20% to below 15% at 1.0 kg/m³, although published data for this specific product configuration remains limited. Sprayed concrete requirements are assessed under EN 14487-1:2005 for classification, and materials for shotcrete are specified under ASTM C1436/C1436M-17a. The terminal product is a temporary rock-support lining with layer thickness from 40 mm to 80 mm. Dosages above 1.5 kg/m³ are not considered workable on single-piston wet-mix machines because fiber accumulation at the nozzle body increases blockages. The fiber does not replace steel fiber reinforcement where post-crack residual strength is required.
Precast architectural cladding panels produced from planetary pan mixers at 20–25 rpm require a low surface-visibility fiber addition. Adfil Sinta F19 is charged at 0.5 kg/m³ to 0.9 kg/m³ after dry aggregate blending and before water and plasticiser dosing. The upper limit is set at 0.6 kg/m³ for acid-etched or sandblasted exposed surfaces; above this level, individual fibrillated bundles may create surface fuzz after texture exposure. The fiber reduces edge slump and green-strength cracking during demoulding, which is particularly significant when panels are stripped at compressive strengths below 15 MPa. Compliance is governed by EN 13369:2018 for common rules for precast concrete products, with fiber conformity evaluated to EN 14889-2:2006. The terminal product is a reinforced or non-loadbearing architectural panel with exposed aggregate surface. Operational limits include avoidance of fiber addition into first-water batch because hydrophobic fiber bundles migrate to the upper surface during vibration. External vibrators at frequencies above 50 Hz increase the risk of fiber upward migration. The material is used only for plastic crack control; structural anchorage and edge reinforcement remain separate.
Where high-alkali repair mortars are placed in 20–40 mm lifts on bridge piers and marine columns, Sinta F19 is dispersed at 0.5 kg/m³ to 0.8 kg/m³ into slow-shaft counter-rotating paddle mixers. The fiber is blended with the dry mortar component for 45–60 seconds before water addition to prevent hydrophobic cluster formation. The principal function is reduction of plastic settlement cracking over embedded reinforcing bars and suppression of edge lifting at patch boundaries. Compliance with EN 1504-3:2005 for structural and non-structural repair products is limited to crack-control criteria, not load-transfer properties. Dispersal adequacy can be checked by washout tests described in EN 14845-2:2006. At field level, batch-to-batch variance increases when bagged fiber is stored above 60% relative humidity because the fibrillated bundles compact; mechanical de-baling before dosing eliminates this failure mode. The terminal product is a patch repair overlay with restrained shrinkage at the interface. Sinta F19 cannot compensate for tensile stress in structural repair sections and must not be used as a substitute for epoxy-bonded reinforcement or crack-bridging agents.
| Application | Relevant standard | Dosage range | Critical process boundary |
|---|---|---|---|
| Industrial floor slab | ASTM C1116/C1116M-10a Type III, EN 14889-2:2006 | 0.6–0.9 kg/m³ | Pre-disperse in aggregate before cement |
| Wet-mix shotcrete | EN 14487-1:2005, ASTM C1436/C1436M-17a | 1.0–1.5 kg/m³ | Not above 1.5 kg/m³ due to nozzle blockages |
| Architectural precast panel | EN 13369:2018 | 0.5–0.9 kg/m³ | Textured surfaces maximum 0.6 kg/m³ |
| Repair mortar overlay | EN 1504-3:2005 | 0.5–0.8 kg/m³ | Dry blend 45–60 s before water |
| Flowing calcium aluminate screed | EN 13813:2002 | 0.6–1.0 kg/m³ | Continuous mixer shear must open fibril bundles |
| Residential slab-on-grade | ACI 302.1R-15, ASTM C1116/C1116M-10a | 0.6–0.9 kg/m³ | Secondary crack control only |
Flowing calcium aluminate screed systems are mixed in high-output continuous twin-shaft mixers where residence time is fixed by throughput and the only adjustable dispersion variable is rotor tip speed. Adfil Sinta F19 is dosed at 0.6 kg/m³ to 1.0 kg/m³ by screw feeding into the sand stream before the binder inlet. The fibrillated bundles require shear rates above 100 s⁻¹ to open the fibril network; below this shear rate, fiber clusters survive into the pump and produce nozzle spitting during placement. Flow table spread is evaluated with EN 12350-5:2019. At 0.6 kg/m³, the change in flow diameter is less than 10 mm; at 1.0 kg/m³, the flow diameter drops by 25–35 mm unless a polycarboxylate superplasticiser dosage is increased by 0.1–0.2% by binder mass. Final screed properties are classified under EN 13813:2002. Field experience from continuous mixing lines indicates that fiber dosing above 1.0 kg/m³ without increased shear leads to fiber mat accumulation on screw-conveyor elements and delivery-line pressure fluctuations. The terminal product is a flowing calcium aluminate screed installed at 20–50 mm thickness over concrete substrates. Sinta F19 does not replace anti-cracking mesh in gypsum-based or calcium sulphate screeds where chemistry differs.
Residential slab-on-grade construction relies on non-structural crack-control reinforcement to reduce early-age plastic shrinkage and settlement cracking. Adfil Sinta F19 is introduced at the ready-mix plant at 0.6 kg/m³ to 0.9 kg/m³, either via automatic fiber dosing systems or pre-packaged rapid-dissolving bags discharged into the truck drum after batching. Drum mixing is specified at 12–14 revolutions per minute for a minimum 100 revolutions after fiber addition to avoid floating fiber aggregates. The dosage falls within the normal range for Type III synthetic fiber-reinforced concrete under ASTM C1116/C1116M-10a, and placement follows the guidance of ACI 302.1R-15 for concrete floor and slab construction. The terminal product is a single-family residential slab-on-grade with mechanically tooled control joints at maximum spacing determined by slab thickness and subgrade friction. Operational limits are explicit: Sinta F19 is a secondary crack-control fiber only; it does not replace welded wire reinforcement where structural flexural capacity or crack-width control is specified. In heavily loaded residential slabs with point loads from interior columns, isolated footings remain mandatory.
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Adfil Sinta F19 is a fibrillated polypropylene micro-fiber cut to a nominal length of 19 mm. The fibrillation process converts an oriented polypropylene film into a branched, net-like multifilament staple rather than a circular monofilament cross-section. Typical supplier-documented polymer values for this fiber class include material density 0.91 g/cm³, water absorption 0.0 %, melting range 160–165 °C, and tensile strength 300–400 MPa; exact batch values should be verified against the current mill certificate. The product is supplied in water-soluble paper packages or bulk bales, and is classified under ASTM C1116/C1116M-10a as a Type III synthetic fiber for concrete. Its scope includes ready-mix concrete, precast elements, mortar, screed, and wet-process shotcrete where controlled low fiber volumes are intended to reduce early-age plastic shrinkage cracking and surface deterioration.
The primary functional boundary is post-crack residual load capacity. Under EN 14651:2005+A1:2007 notched beam testing, hooked-end steel fibers can maintain residual tensile loads at crack mouth opening displacement values above 0.5 mm; a micro-synthetic fibrillated fiber typically loses pull-out resistance at crack openings below 0.2 mm. Published data for this specific configuration is limited; however, the elastic modulus of polypropylene—3.5–4.0 GPa compared with 200–210 GPa for steel—means that Adfil Sinta F19 cannot substitute for primary flexural reinforcement under ACI 318-19 Chapter 24 or Eurocode 2 Section 9. Dosage values above 3.0 kg/m³ may create finishing and distribution difficulties before achieving the post-crack toughness of macro-synthetic fibers at lengths 38–54 mm. The specification boundary is therefore early-age crack control, abrasion resistance, and surface integrity rather than structural load transfer.
Because fibrillation increases the surface-to-volume ratio relative to a circular monofilament of equivalent denier, Adfil Sinta F19 anchors into the cement matrix through a combination of mechanical interlock and interfacial friction. In a central mix plant using a 3.0 m³ twin-shaft compulsory mixer at 28–32 rpm, fiber addition after coarse aggregate and before the final mixing water produces complete dispersion within 4–5 minutes. In ready-mix truck mixers, 12–15 rpm for 5 minutes after fiber addition is sufficient for dosages up to 1.8 kg/m³. Batch-to-batch volumetric feeding can vary because fibrillated fiber has lower bulk density and higher void volume than monofilament pellets; a volumetric feeder set on the basis of solid polymer density 0.91 g/cm³ can underfeed by 8–12 % if bales are compressed. Weight-based dosing or calibrated screw feeders are recommended in automated plants. The failure mode observed on production lines is fiber clumping in the hopper when entire bales are introduced into mixes with slump below 100 mm.
Evaporation-driven plastic shrinkage begins when the bleed-water surface film is removed faster than it is replaced. Under ASTM C1579-21, fibrillated micro-synthetic fibers are evaluated by measuring crack area after controlled evaporation from fresh mortar overlays. Product literature for similar fibrillated polypropylene fibers indicates that a dosage of 0.9 kg/m³ can reduce crack area by 40–60 % relative to plain reference, but the exact value depends on aggregate stiffness, curing, wind velocity, and concrete temperature. For Adfil Sinta F19, the supplier should provide batch-specific ASTM C1579-21 data when placement occurs at wind speeds above 15 km/h or concrete temperatures above 30 °C. The fibrillation geometry is significant: a circular monofilament of the same length relies primarily on interfacial friction, while the fibril branches intercept microcracks at multiple orientations and reduce the tendency for a single dominant plastic-shrinkage crack to propagate.
For composite metal decking and thin bonded overlays, the typical dosage range is 0.9–1.2 kg/m³. At 0.6 kg/m³, the fiber count may be too low to interrupt cracking under high evaporation conditions. At 1.8 kg/m³, surface finish may show protruding fibrils, especially when the concrete is burnished too early. Comparative geometry and performance boundaries are summarized below.
| Property | Adfil Sinta F19 | Circular monofilament PP | Hooked-end steel fiber |
|---|---|---|---|
| Fiber category | Fibrillated micro-synthetic | Monofilament micro-synthetic | Structural macro-fiber |
| Nominal length | 19 mm | 12–19 mm | 35–60 mm |
| Material density | 0.91 g/cm³ | 0.91 g/cm³ | 7.85 g/cm³ |
| Tensile strength | 300–400 MPa | 300–400 MPa | 1100–1500 MPa |
| Elastic modulus | 3.5–4.0 GPa | 3.5–4.0 GPa | 200–210 GPa |
| Typical dosage | 0.6–1.8 kg/m³ | 0.6–1.8 kg/m³ | 20–40 kg/m³ |
| Primary design role | Plastic shrinkage and surface integrity | Plastic shrinkage | Post-crack flexural toughness |
| Common test method | ASTM C1116/C1116M-10a | ASTM C1116/C1116M-10a | ASTM C1609/C1609M, EN 14651 |
For wet-process sprayed concrete, fiber feed through a dosing unit on a wet-mix rig requires a low-friction polypropylene fiber pack without monofilament clumps. Adfil Sinta F19 can be added at the batch plant or through a portable conveyor into the hopper. In wet-mix shotcrete, addition at 0.9–1.2 kg/m³ is used to control rebound-induced surface cracking; the fiber does not replace welded wire mesh for primary support in tunnel linings. Polypropylene does not hydrolise in the Ca(OH)₂ environment of portland cement at pH 12–13, so alkali-induced strength loss is not a practical concern for the fiber itself.
High-shear mixing at 60–80 rpm in a pan mixer does not separate the fibrils from the matrix, but prolonged mixing beyond 10 minutes can fold and mat the fibers into visible strain bands. Air entrainment remains controllable up to 0.9 kg/m³; at 1.8 kg/m³, air content measured by ASTM C231/C231M-17a may rise by 1.0–1.5 %. If the air content exceeds the specified window, defoamer dosage should be adjusted before reducing fiber dosage. Plastic viscosity under EN 12350-5 typically increases, but the fiber does not increase water demand because it absorbs 0.0 % moisture. An exception occurs when the mix contains high dosages of silica fume; the combined increase in paste stickiness can reduce pumpability and may require a mid-range water reducer.
Thermal processing limits are defined by the softening region of polypropylene: service exposure above 160 °C is not recommended. Autoclave curing up to 90–95 °C and steam curing at 60–80 °C remain below the softening point and do not negatively affect fiber integrity. Chemical incompatibilities are limited, but strong oxidizing agents and certain aromatic hydrocarbons can swell or degrade polypropylene; the fiber should not be stored near fuels or solvent-based admixtures. In aggressive sulfate or chloride environments, the fiber is inert and does not contribute to corrosion, unlike steel fibers. Compliance is documented under REACH Regulation (EC) No 1907/2006 and RoHS Directive 2011/65/EU.
| Requirement | Designation | Relevance |
|---|---|---|
| Synthetic fiber classification | ASTM C1116/C1116M-10a | Type III synthetic fiber for concrete |
| Polymer fibers for concrete | EN 14889-2:2006 | Definitions, specifications, conformity |
| Quality management | ISO 9001:2015 | Manufacturing batch control |
| Chemical registration | REACH Regulation (EC) No 1907/2006 | European substance compliance |
| Hazardous substances | RoHS Directive 2011/65/EU | Restricted substance compliance |
Differences from other micro-synthetic products are most evident under surface inspection. Circular monofilament products of the same 19 mm length present a smooth lateral surface and lower anchoring force per unit length; they may be preferred when a clean, lint-free finish is critical. Fibrillated products such as Adfil Sinta F19 form multiple fine fibrils that reduce visible plastic settlement cracks and improve surface wear resistance under ASTM C779/C779M or EN 13813 screed testing. The fibrillation also increases bulk volume per kilogram, so storage and dosing systems must be sized for lower bulk density. In precast applications where polished or acid-etched surfaces are specified, trial panels should be produced at the intended fiber dosage because fibrils can protrude through fine-grout finishes; a burnished finish is typically required when fiber visibility at the surface is unacceptable.
