| HS Code | 995109 |
| Material | 100% virgin polypropylene |
| Fiber Type | Synthetic micro monofilament |
| Specific Gravity | 0.91 |
| Fiber Length | 12 mm |
| Fiber Diameter | 0.018 mm |
| Aspect Ratio | 667 |
| Tensile Strength | 400 MPa |
| Young S Modulus | 3500 MPa |
| Melting Point | 160 °C |
| Ignition Point | >350 °C |
| Alkali Resistance | Excellent |
| Acid Resistance | Excellent |
| Water Absorption | Nil |
| Recommended Dosage | 0.9 kg/m³ |
As an accredited CHRYSO (Adfil) Fibrin XT - Synthetic Micro Monofilament Polypropylene Fiber factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | CHRYSO Adfil Fibrin XT is packaged in 0.9 kg water-soluble bags, supplied 20 bags per 18 kg carton. |
| Container Loading (20′ FCL) | 20′ FCL container loading for CHRYSO (Adfil) Fibrin XT synthetic micro monofilament polypropylene fiber, palletized and stowed for export transport. |
| Shipping | CHRYSO (Adfil) Fibrin XT is a synthetic micro monofilament polypropylene fiber supplied in moisture-resistant bags or boxes, palletized and shrink-wrapped. Store and ship in dry, covered conditions, avoiding moisture, punctures, and prolonged UV exposure. It is not classified as dangerous goods and requires no special transport documentation. |
| Storage | Store CHRYSO (Adfil) Fibrin XT in a cool, dry, well-ventilated area. Keep original packages tightly closed, off the ground, and away from moisture, direct sunlight, heat, and ignition sources. Protect from UV and physical damage. Maintain good housekeeping, avoid dust generation, and separate from incompatible chemicals. Follow local regulations and supplier guidance. Do not store outdoors or in wet conditions. |
| Shelf Life | Shelf life is 24 months from date of manufacture when stored dry in original unopened packaging, protected from direct sunlight. |
In precast tunnel lining segment production, the synthetic micro monofilament polypropylene fibre is evaluated under EN 14889-2:2006 Class Ia before any concrete trial batching is approved. The fibre is typically dry-batched at 1.0–2.0 kg/m³ in segment mixes with water/cement ratios between 0.32 and 0.40; the exact dosage is not constant because the fire spalling resistance requirement depends on the specified fire curve, segment thickness, and residual moisture condition of the hardened concrete. In a twin-shaft compulsory mixer with a batch capacity of 1.5–4.5 m³, Fibrin XT is introduced after the coarse aggregate and before the first water fraction, and mixing is extended by 30–60 seconds after the last feed to prevent hydrophobic clustering around paddle arms and shaft seals. The fresh concrete is cast into carousel steel moulds and compacted with external high-frequency vibrators operating at 50–80 Hz; the fibre distribution is checked by wash-out tests against the project-specific tolerance, not by visual observation alone. During fire exposure, the polypropylene monofilament melts at approximately 160–170 °C and creates a network of vapour-release pathways through the cementitious matrix, but this mechanism is treated only as passive spalling mitigation and is not a substitute for structural reinforcement or fire insulation boards. The terminal product is a reinforced precast segment for TBM-driven metro, road, or drainage tunnels, accompanied by a Declaration of Performance under EN 14889-2:2006 and compressive strength records under EN 12390-3:2019.
Wet-mix shotcrete for slope stabilization and temporary tunnel support is specified under EFNARC 1996 or ACI 506R-16, and the use of a synthetic micro monofilament polypropylene fibre is assessed by ASTM C1436/C1436M-17 for material acceptance and ASTM C1604/C1604M-19 for sampling and testing of shotcrete. Dosage varies from 0.9 kg/m³ to 1.2 kg/m³ in the delivered concrete, but the addition point is more critical than the total amount: late addition at the truck mixer or at the pump hopper without 30 seconds of high-agitation mixing produces fibre clusters that cause pulsation in a piston-type concrete pump operating at 120–160 bar. The shotcrete robot or hand nozzle is run at 5–7 m³/h output, with nozzle air pressure held between 4 bar and 6 bar, and an alkali-free accelerator is metered at 4–8% by weight of cementitious binder. Micro-monofilament polypropylene fibres in this application act primarily during the first 6–8 hours after placement to control plastic shrinkage cracking of the 75–150 mm thick temporary lining; they are not a substitute for structural steel fibre or welded wire mesh in permanent load-bearing shotcrete linings. The terminal product is a temporary rock or soil support layer whose rebound during application is recorded and compared against the project-specific target, commonly below 15% for wet-mix materials with optimised fibre addition and nozzle configuration.
Warehouse and logistics floor concrete is specified under ASTM C1116/C1116M-10a Type III for synthetic fibre-reinforced concrete and under EN 14889-2:2006 when the project is located in a CE-marked jurisdiction. Fibrin XT is batched at 0.6–0.9 kg/m³ for slab-on-grade work, and the batching sequence in a central mix plant places the fibre between the coarse aggregate and the first water fraction to reduce hydrophobic clumping before the mixing drum starts. Truck mixers are rotated at 12–16 rpm for 5–7 minutes before discharge, after which the concrete is placed by a laser-guided screed at 30–60 m³/h and closed with ride-on power trowels fitted with combination blades. The fibre reduces early-age plastic shrinkage cracking when evaluated by ASTM C1579-21, but it also changes the surface bleed timeline: on production floors, the power trowel pass is initiated 30–60 minutes earlier than with plain concrete to avoid matting the monofilaments into the surface. The terminal product is a 150–250 mm thick slab on grade with saw-cut joint spacing normally between 4.5 m and 6.0 m; the synthetic micro fibre is accepted only as a plastic-shrinkage crack control agent and is not a replacement for steel fabric, dowels, or structural macrofibres at construction joints and load-transfer zones.
Pre-bagged high-build repair mortar for vertical and overhead concrete repair is specified under EN 1504-3:2005, with performance requirements for compressive strength, chloride ion content, shrinkage, and bond tested to EN 12190, EN 196-1, EN 12617-4, and EN 1542. In this downstream use, a synthetic micro monofilament polypropylene fibre is dry-blended with the cementitious powder component at 0.5–1.0 kg/m³ before any liquid polymer or additional water is introduced, because direct addition to a latex-modified wet mortar can result in hydrophobic fibre segregation and surface balling. The mortar is mixed in a forced-action paddle mixer at 400–600 rpm for 3 minutes, followed by a 2-minute rest for polymer hydration and a final 1-minute remix. Application to overhead patches is carried out in lifts up to 30 mm, and the fibre contributes to sag resistance and early-age crack control during curing; however, published data for Fibrin XT in EN 1504-3 Class R4 formulations is limited, so the dosage must be validated in a laboratory trial for each polymer-modified binder system. The terminal product is a structural patch whose bond strength is verified by pull-off testing to EN 1542, with Class R4 projects commonly requiring values above 0.8 MPa.
For cementitious rock bolt and cable anchor grouting, the addition of a micro monofilament polypropylene fibre is introduced only in the dry grout component at the batching plant, because post-addition at the nozzle of a single-line worm pump is rarely homogeneous at water/cement ratios below 0.40. The grout is proportioned to 0.36–0.40 water/cement and mixed in a high-shear colloidal mixer at 1500–2000 rpm for 3–5 minutes; the fibre dosage is kept between 0.3 kg/m³ and 0.6 kg/m³ to avoid restricting flow through 20–25 mm internal diameter delivery hoses. Compliance is drawn from EN 445:2007 and EN 447:2007 for cementitious grout, while the fibre itself is covered by EN 14889-2:2006 when CE marking is required. The fibre limits bleed water and plastic settlement in long boreholes drilled for soil nails and cable bolts; it does not improve the load transfer of the fully cured grout and is not used as a replacement for neat cement grout adhesion. The terminal product is a 2–4 m bond length of rock anchor or cable bolt grout whose bleed after 3 hours is measured under ASTM C940 or the applicable EN 445 method, and whose grout cube strength is checked at 28 days.
In flowing screed for underfloor heating and acoustic build-ups, the binder may be calcium sulfate or cement-based, and the floor screed is specified under EN 13813:2002 with a declared compressive strength class. The fibre dosage for this application is normally 0.6–1.0 kg/m³, but the actual addition is conditioned by the mixer-pump type: a continuous twin-shaft mixer with a worm pump at 10–20 m³/h accepts the fibre in the dry binder stream before the gauging water, whereas a discontinuous paddle mixer requires pre-dispersion of the fibre in the aggregate fraction. The terminal screed layer is usually 35–50 mm thick, laid over a separation membrane or directly bonded, and finished with a spiked roller to release entrained air. The micro monofilament fibre reduces surface craze cracking and edge curling during the first 48 hours, but it can increase the apparent wet density because of air entrapment if the mixer speed exceeds 400 rpm; therefore the air content is checked by EN 1015-7:1998 and the consistency is recorded by the binder supplier’s flow method. Published data for Fibrin XT in flowing calcium sulfate screeds is limited, so the dosage must be adjusted in a field trial when the raw anhydrite binder has a fines content above 30% passing 0.075 mm.
Architectural precast facade panels with acid-etched or retarded surfaces require controlled bleeding and minimal surface fuzzing after demoulding. In this application, a synthetic micro monofilament polypropylene fibre is batched at 0.5–0.8 kg/m³ and is covered by EN 14889-2:2006 Class Ia, while the execution requirements for the concrete element fall under EN 13670:2009 and the concrete specification under EN 206:2013. The panel mix is usually self-compacting, with a slump-flow class between 550 mm and 650 mm, and the fibre is introduced into the sand fraction before the binder and fines are added to prevent balling in the high-range water-reducing admixture. Vertical formwork is filled from the bottom through purpose-made ports, and the panel is demoulded at 16–20 hours; the retarding agent applied to the form face delays the surface set and allows high-pressure water washing to expose the aggregate. The fibre reduces plastic settlement cracks and edge damage during handling, but published data for Fibrin XT in vertically cast self-compacting facade mixes is limited, so surface retardation trials are required to verify that exposed fibre ends do not create unacceptable visual defects. The terminal product is a load-bearing or non-load-bearing architectural panel whose surface finish and dimensional tolerances are recorded under the project’s facade specification.
| Application | Dosage range | Primary compliance | Critical process parameter | Terminal product |
|---|---|---|---|---|
| Precast tunnel segment | 1.0–2.0 kg/m³ | EN 14889-2:2006 | Twin-shaft mixing after coarse aggregate, 30–60 s extended mixing | Fire-spalling-resistant segment |
| Wet-mix shotcrete | 0.9–1.2 kg/m³ | EFNARC 1996, ASTM C1436 | Piston pump pressure 120–160 bar, nozzle air 4–6 bar | Temporary support lining |
| Industrial slab-on-grade | 0.6–0.9 kg/m³ | ASTM C1116 Type III, EN 14889-2 | Power trowel timing shifted 30–60 min earlier | Warehouse floor slab |
| Polymer-modified repair mortar | 0.5–1.0 kg/m³ | EN 1504-3 Class R4 | Dry blend before latex addition, paddle mixing 400–600 rpm | Structural patch |
| Rock bolt grout | 0.3–0.6 kg/m³ | EN 445:2007, EN 447:2007 | High-shear colloidal mixing at 1500–2000 rpm | Anchor bond length |
| Flowing screed | 0.6–1.0 kg/m³ | EN 13813:2002 | Continuous mixer-pump output 10–20 m³/h, air content by EN 1015-7 | 35–50 mm floor screed |
| Architectural precast facade panel | 0.5–0.8 kg/m³ | EN 14889-2:2006, EN 13670:2009 | Self-compacting slump flow 550–650 mm, retarder wash exposure | Exposed aggregate facade panel |
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Within the classification framework of EN 14889-2:2006, CHRYSO (Adfil) Fibrin XT is introduced as a synthetic micro monofilament polypropylene fibre for concrete and mortar. Manufacturer-published nominal geometry comprises a 12 mm length and an 18 µm diameter, yielding an aspect ratio of approximately 667. The base polymer is virgin polypropylene with a density of 0.91 g/cm³ determined by ISO 1183-1:2019, a tensile strength of 300 MPa and an elastic modulus of 3.5 GPa reported under EN 14889-2:2006 type testing. The theoretical filament population computed from the nominal geometry and density is 3.6 × 10⁸ filaments/kg. The fibre is hydrophobic; water absorption under ISO 62:2008 is below 0.1% by mass. The product falls within the Class II polymer fibre group for non-structural concrete and is classified as Type III under ASTM C1116/C1116M-23. This classification imposes no residual flexural strength function; the fibre acts exclusively in early-age plastic shrinkage crack control and bleeding regulation.
The principal distinction is geometric rather than chemical. Fibrillated polypropylene products rely on shear-induced opening of a film network into interconnected filaments; Fibrin XT is extruded as discrete monofilaments, so dispersion does not depend on mixer energy to the same degree. In a low water-cement concrete of 0.40 water-cement ratio, monofilament addition at 0.9 kg/m³ produces a fine three-dimensional fibre grid at approximately 3.2 × 10⁸ filaments/m³ after uniform distribution. A macro-synthetic fibre with 50 mm length and 0.8 mm diameter at 3.0 kg/m³ has a filament count several orders of magnitude lower and is intended for post-crack residual strength, not early-age plastic crack control. Steel fibres exhibit density of 7.85 g/cm³, tensile strength of 1 200 MPa, and elastic modulus of 200 GPa; Fibrin XT is 0.91 g/cm³, 300 MPa, and 3.5 GPa. The modulus difference is critical: micro polypropylene cannot replace steel for flexural hardening. Its function is constrained to crack bridging in the first hours after placement, when concrete tensile strain capacity is below 100 × 10⁻⁶.
| Property | Micro monofilament PP | Fibrillated PP | Macro-synthetic | Steel |
|---|---|---|---|---|
| Density, ISO 1183-1:2019 | 0.91 g/cm³ | 0.91 g/cm³ | 0.91 g/cm³ | 7.85 g/cm³ |
| Nominal diameter | 18 µm individual | 20–50 µm fibril network | 0.8 mm | 0.75 mm |
| Nominal length | 12 mm | 19 mm | 50 mm | 60 mm |
| Tensile strength | 300 MPa | 400 MPa | 500 MPa | 1 200 MPa |
| Elastic modulus | 3.5 GPa | 4.0 GPa | 7.0 GPa | 200 GPa |
| Primary function | Plastic shrinkage crack control | Plastic shrinkage crack control | Post-crack residual strength | Post-crack flexural toughness and structural reinforcement |
| Corrosion behaviour | Inert in alkaline concrete | Inert in alkaline concrete | Inert in alkaline concrete | Corrosion susceptible |
On a 2.0 m³ twin-shaft compulsory mixer operating at 45 rpm, Fibrin XT is added after coarse aggregate, fine aggregate, and cement have been dry-mixed for 30 s; the remaining mixing water and superplasticizer are then introduced over 15 s and mixed for 90 s. This sequence prevents hydrophobic fibre agglomeration in the first stages of wetting. In truck-mixed concrete, preweighed water-soluble bags are charged into the drum at the plant after the initial aggregate loading and before the addition of the final 10% mixing water; the drum is rotated at 14 rpm for 5 min. At the standard dosage of 0.9 kg/m³, the fibre volume fraction is 0.099%. Slump under EN 12350-2:2019 is typically reduced by 10 mm to 25 mm relative to the plain reference mix at the same water content, which is compensated in mix design rather than by uncontrolled site water addition. Pumping through a 125 mm nominal diameter boom-line over 40 m has not been associated with blockages at dosages below 1.2 kg/m³ when the coarse aggregate maximum size is 20 mm and the sand-to-total aggregate ratio is maintained above 0.45.
Air-entrained concrete requires sequence control. In mixes designed to achieve 5% to 7% air content by ASTM C231/C231M-17, addition of hydrophobic monofilament before the air-entraining admixture can reduce measured air content by 0.5 to 1.0 percentage point. The air-entraining agent is therefore added after fibre dispersion, and the dosage is adjusted using the hardened air-void spacing factor measured under ASTM C457/C457M-16 when frost exposure is specified. In pan mixers with lower shear, mixing time after fibre addition should be extended from 90 s to 120 s; in high-intensity counter-current mixers with rotor speeds up to 200 rpm, dispersion is typically complete within 45 s. Residual fibre agglomeration is checked by washing a fresh concrete sample over a 75 µm sieve and counting retained clumps.
Plastic shrinkage cracks form when the evaporation rate from the fresh concrete surface exceeds the bleeding rate, producing negative capillary pressure in the pore water. ACI 305R-10 provides the conventional evaporation nomograph; critical conditions occur at evaporation rates above 1.0 kg/m²/h, typically with high wind speed, high concrete temperature, and low relative humidity. Under ASTM C1579-21, restrained panel testing of concrete containing 0.9 kg/m³ of Fibrin XT shows reduced crack width compared with the plain reference. Published manufacturer type-test summaries report crack width reductions of 40% to 70% under standard exposure at the reference dosage; the absolute reduction is mix-dependent, and the method does not transfer directly to field conditions without slab thickness and wind-speed correction. The fibre mechanism is physical: the 18 µm monofilaments span developing water menisci at the bleed-water channels and increase the apparent tensile strain capacity of the fresh paste. This effect is limited to the first 6 h to 8 h after placement; it ceases after hardening shrinkage transitions to a restrained cracking mechanism governed by cement paste stiffness and aggregate restraint.
In dry-mix shotcrete, Fibrin XT is metered with the dry constituent stream into a 3.0 m³/h to 8.0 m³/h rotor-type gunite machine; the monofilament geometry prevents fibre entanglement at the rotor airlock, provided the moisture content of the dry mix is kept below 0.3% by mass. In precast façade panels, the 0.9 kg/m³ dosage reduces surface plastic settlement cracks around rebates and mitred edges without changing demoulding time. The fibre is non-magnetic and does not influence eddy-current or ultrasonic panel testing. When used in white or architectural concrete, the fine diameter may produce a slight matte texture after acid etching; trials are required on the specified formwork release agent and curing protocol.
Polypropylene is resistant to cement pore solutions with pH values commonly between 12.5 and 13.5. Manufacturer data indicate no significant loss in tensile strength after 28 d immersion in 1 M NaOH at 20°C; published data for prolonged alkali exposure at elevated temperature are limited. The melting temperature determined by ISO 11357-3:2018 is 160°C, which is above autoclave curing temperatures but below the temperature of steam-flush cleaning operations on hardened concrete surfaces. The fibre should not be relied upon in autoclaved aerated concrete if local temperature exceeds 100°C for sustained periods, as softening and loss of crack-bridging stiffness occur near the melting range. In ordinary hardened concrete at service temperatures below 60°C, oxidative degradation in the alkaline matrix is slow; no structural reliance is placed on long-term fibre persistence because the design function is complete after plastic shrinkage has ceased.
At dosages above 1.5 kg/m³, finishability on ride-on laser screeds becomes a documented process boundary. Fibres begin to protrude at the surface if trowelling occurs before bleed water has fully disappeared; the operational sequence should delay floating until a footprint leaves no more than 3 mm indentation. The standard dosage of 0.9 kg/m³ is selected to maintain pumpability and finishing productivity; increasing to 1.2 kg/m³ may be considered for severe evaporation conditions but should be confirmed by a field panel. In self-compacting concrete with slump flow of 650 mm to 750 mm, the fibre increases viscosity and may reduce slump flow by 30 mm to 60 mm at 0.9 kg/m³; adjustments to superplasticizer dosage are determined by EN 12350-8:2019. Fibrin XT at 0.9 kg/m³ does not produce a measurable residual flexural strength gain under ASTM C1609/C1609M-24 or EN 14651:2005+A1:2007. If post-crack residual strength is specified, steel fibre or macro-synthetic fibre at dosages of 3.0 kg/m³ to 40 kg/m³ must be evaluated separately. The product is not a replacement for curing, wind breaks, or fog misting. Its use does not obviate the requirements of ACI 308R-16 or EN 13670:2009 for early-age moisture retention.
| Requirement | Standard or test method | Declared or measured value |
|---|---|---|
| CE marking and polymer fibre classification | EN 14889-2:2006 | Class II |
| Synthetic fibre type | ASTM C1116/C1116M-23 | Type III |
| Density | ISO 1183-1:2019 | 0.91 g/cm³ |
| Water absorption | ISO 62:2008 | <0.1% by mass |
| Melting temperature | ISO 11357-3:2018 | 160°C |
| Tensile strength | EN 14889-2:2006 type testing | 300 MPa |
| Elastic modulus | EN 14889-2:2006 type testing | 3.5 GPa |
| Nominal length | EN 14889-2:2006 type testing | 12 mm |
| Nominal diameter | EN 14889-2:2006 type testing | 18 µm |
