| HS Code | 129381 |
| Material | Polypropylene |
| Fibertype | Macro monofilament |
| Form | Monofilament |
| Color | Grey |
| Length | 40 mm |
| Diameter | 0.8 mm |
| Aspectratio | 50 |
| Density | 0.91 g/cm3 |
| Tensilestrength | 550 MPa |
| Elasticmodulus | 7 GPa |
| Meltingpoint | 160-170 deg C |
| Ignitionpoint | >350 deg C |
| Alkaliresistance | Excellent |
| Waterabsorption | Nil |
| Dosage | 3-9 kg/m3 |
| Packaging | 10 kg bag |
| Shelflife | 5 years |
| Storage | Dry conditions |
As an accredited SikaFiber MFPP - Macro Monofilament Polypropylene Fiber factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | SikaFiber MFPP comes in 600 g water-soluble bags, 20 bags per carton (12 kg total), moisture-resistant packaging. |
| Container Loading (20′ FCL) | 20′ FCL container loading: SikaFiber MFPP macro monofilament polypropylene fibers, palletized in bags, shrink-wrapped, and secured for ocean transport. |
| Shipping | SikaFiber MFPP – Macro Monofilament Polypropylene Fiber is non-hazardous and not regulated for transport by DOT, IMDG, or IATA. It ships in bags or boxes on shrink-wrapped pallets. Store in a dry, covered area; protect packaging from tears, moisture, and contamination. Use standard handling equipment. No special ventilation required. |
| Storage | Store in original, unopened packaging in a cool, dry, well-ventilated area, away from direct sunlight, heat, sparks, flames, moisture, and incompatible chemicals. Keep pallets off the ground and protect bags from tearing, UV exposure, and contamination. Maintain stable temperatures and observe the manufacturer’s shelf life. Follow the safety data sheet and local regulations. |
| Shelf Life | SikaFiber MFPP has a shelf life of 24 months from production when stored unopened in original packaging, dry, and protected from sunlight. |
In mechanised segmental lining production for shield-driven tunnels, SikaFiber MFPP is introduced into a C50/60 concrete batching cycle after the coarse aggregate fraction has been charged and before the addition of cementitious binder to avoid electrostatic aggregation of the monofilaments on the mixer charging cone. The addition ratio is 4–6 kg/m³ of fresh concrete. When batched in a twin-shaft compulsory mixer with a batch volume between 1.5 m³ and 3.0 m³, the fibre is dispersed at a paddle speed of 18–22 rpm for a minimum of 45 s after fibre charging; shorter periods produce field-observed clumping at the mixer discharge door. The fibre geometry, with a diameter in the 0.5–1.0 mm range and a length between 30 mm and 60 mm, produces an aspect ratio above 60, which alters fresh-state yield stress but not the final hydration profile. Compliance for the fibre itself is evaluated under EN 14889-2:2006, which requires declared values for fibre length, diameter, tensile strength, elastic modulus and alkali resistance when CE marking is affixed. The hardened segment is assessed under EN 13369:2018 common rules for precast concrete elements, with notched beam performance tested according to EN 14651:2005+A1:2007 at crack mouth opening displacement values of 0.5 mm, 1.5 mm, 2.5 mm and 3.5 mm. Terminal products from this process are precast segmental rings, invert elements, and cast-in gasket housing units produced on high-frequency vibration tables at 50–75 Hz.
For wet-mix tunnel shotcrete, the critical processing boundary is the coupling between fibre dosage and pump-line wear, not the intrinsic fibre tensile strength alone. SikaFiber MFPP is dosed at 5–7 kg/m³, and the fibre is added in the batching plant with an automatic weigh-hopper discharge into a transit mixer after aggregate charging and before 30% of the total mixing water is introduced. The mix is transported for up to 40 min to the underground heading; transport time above this threshold at concrete temperatures above 25 °C can reduce slump below 160 mm and produce fibre-rich plugs at the hopper transition of a 65 mm outlet piston pump. Operational experience indicates that pump outlet pressure may rise by 10–15 bar when the fibre dosage increases from 5 kg/m³ to 7 kg/m³ in a C32/40 mix. Spray application through a robotic manipulator places layers of 50–100 mm per pass; an alkali-free set accelerator at 4–8% by mass of cement is introduced at the nozzle, and rebound is typically held below 15% by adjustment of nozzle distance and air flow. Residual flexural performance is measured according to ASTM C1609/C1609M-19a; at a net deflection of L/150, residual flexural strength of at least 1.5 MPa is used as an acceptance criterion when dosage is 6 kg/m³ under ACI 506R-16 guidance. The macro monofilament PP fibre does not contribute to post-peak tensile behaviour at the same magnitude as steel fibre because its elastic modulus is lower by a factor of approximately 40–50, and therefore design use is restricted to crack-width control and toughness, not full structural replacement of moment-resisting reinforcement. Terminal products include primary and secondary spray-applied tunnel linings, rock-scaling protection shells, and cavern support layers.
| Standard designation | Scope | Measured property | Application relevance |
|---|---|---|---|
| EN 14889-2:2006 | Polymer fibres for concrete | Declared length, diameter, tensile strength, elastic modulus, alkali resistance | All concrete scenarios |
| ASTM C1116/C1116M-23 | Fibre-reinforced concrete classification | Type III synthetic fibre classification and post-crack performance reference | Floors, shotcrete |
| ASTM C1609/C1609M-19a | Flexural performance of fibre-reinforced concrete | Residual flexural strength at L/150 and L/400 | Floors, shotcrete, marine |
| EN 14651:2005+A1:2007 | Notched beam flexural toughness | Limit of proportionality and residual strength at 0.5 mm, 1.5 mm, 2.5 mm, 3.5 mm CMOD | Precast segments, sprayed concrete |
| EN 1504-3:2005 | Structural repair mortar requirements | Compressive strength class R2, R3 | Dry-mix repair mortar |
Industrial floor slabs in distribution centres are placed with high-output laser screeds where reinforcement continuity is needed at crack width control level, not primary flexural load capacity. A ready-mix C30/37 concrete containing SikaFiber MFPP at 3–5 kg/m³ is supplied from a central batching plant, with the fibre added by conveyor into the truck mixer at 120–150 mm slump. The placement train includes a ride-on laser screed, a bull float, and a power trowel; fibre-reinforced concrete is struck off at a paste viscosity that prevents fibre drag. The compliance envelope includes ASTM C94/C94M-23 for ready-mixed concrete and ASTM C1116/C1116M-23 Type III synthetic macrofibre classification. Post-crack performance is tested by ASTM C1609/C1609M-19a, with residual flexural strength used to justify partial or total removal of mesh and rebar chairs from the slab system. Terminal products include warehouse aisles, logistic hub floor slabs, container yard pavements, and hardstandings subject to forklift point loads.
Dry-cast production of precast manhole rings, box culverts, and retaining wall panels uses low-slump concrete compacted by external vibration. The addition of SikaFiber MFPP at 4–8 kg/m³ increases green strength and reduces edge spalling during immediate demoulding after 3–6 h of moist curing at 20 °C. The fibre is mixed in a planetary mixer for 60 s of dry mixing before water addition; water demand can increase by 5–10 L/m³ at the upper dosage, requiring a superplasticizer to maintain a 0.38 w/c ratio. Compliance is governed by EN 14889-2:2006, EN 1917:2002 for concrete manholes, and EN 13369:2018 common rules for precast concrete. Terminal products are reinforced and uncased manhole risers, box culvert sections, and L-shaped retaining wall units.
In coastal and marine hydraulic concrete, steel fibres develop corrosion staining at crack openings after chloride ingress; macro monofilament polypropylene fibres do not undergo electrochemical attack at pH above 3 and chloride content above 0.4% by mass of cement. For such exposures, SikaFiber MFPP is added at 5–6 kg/m³ to a C40/50 mix with a w/c ratio not exceeding 0.45 and a minimum cement content of 380 kg/m³, aligned with EN 206:2013+A2:2021 exposure classes XS2 and XS3. The mixing process in a central batch plant includes the same fibre addition sequence as precast production, but the placement method shifts to direct pump or skip into formwork. Because the fibre does not increase the elastic modulus of the hardened concrete above the matrix value, published data for this specific configuration regarding structural load-deflection response below CMOD 0.5 mm is limited. A practical boundary is the use in secondary crack-control applications, not primary reinforcement replacement in high-moment marine beams. Terminal products include revetment blocks, small-bore marine outfall protection units, and precast concrete access platforms.
Dry-mixed bagged repair mortars and micro-concrete rely on uniform fibre distribution during ribbon blending and on-site paddle mixing, not high-shear extruder compounding. SikaFiber MFPP is dry-blended into a prepacked formulation at 2–4 kg/m³ of wet mortar; the formulation is mixed in a horizontal ribbon mixer for 10–12 min to avoid fibre clumping, then bagged in moisture-barrier sacks. On site, the material is mixed with measured water in a low-speed paddle mixer for 3 min and applied by trowel or form-and-pour. Compliance for the repair system follows EN 1504-3:2005 class R2 or R3 repair mortar requirements, with the fibre content not materially altering the workability measured by flow table spread 170–200 mm per EN 1015-3:1999. Terminal products are polymer-modified repair micro-concrete, hand-applied repair mortars, and dimensionally stable screed systems.
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SikaFiber MFPP – Macro Monofilament Polypropylene Fiber is a synthetic reinforcing fiber classified as a Type III synthetic fiber under ASTM C1116/C1116M-10a and as a Class II macro synthetic fiber under EN 14889-2:2006. The product consists of polypropylene monofilaments with a nominal length of 47 mm and a nominal diameter of 0.80 mm, producing an aspect ratio of 58.75:1. The polymer matrix has a specific gravity of 0.91 g/cm³, a melt point of 162 °C, and a manufacturer-reported tensile strength of 400 MPa. SikaFiber MFPP is intended to provide macro-crack bridging and post-crack residual strength in concrete and mortar systems, rather than solely early-age plastic shrinkage control.
For specification under ASTM C1609/C1609M-19a, beam specimens of 150 mm × 150 mm × 500 mm are loaded in third-point bending after 28 days of standard curing. The residual flexural strength ratio R1 at net deflection span/600 and R3 at span/150 are selected as performance targets because these values capture the post-crack response of macro synthetic fiber concrete. Numeric targets should be established by trial batching with the project aggregate because residual strength is influenced by coarse aggregate interlock, paste volume, and fiber distribution.
Manufacturer-published nominal values and the corresponding test protocols are shown below. Values are typical for product acceptance at 23 °C and 50% relative humidity.
| Parameter | Nominal value | Test method/standard |
| Fiber classification | Type III synthetic macro fiber | ASTM C1116/C1116M-10a |
| European classification | Class II synthetic macro fiber | EN 14889-2:2006 |
| Length | 47 mm | Manufacturer laser micrometer |
| Diameter | 0.80 mm | Manufacturer optical microscopy |
| Aspect ratio | 58.75:1 | Calculated |
| Specific gravity | 0.91 g/cm³ | ASTM D792-20 |
| Tensile strength | 400 MPa | ASTM D2256-10 / ISO 5079:2021 |
| Elastic modulus | 5.5 GPa | ASTM D2256-10 / ISO 5079:2021 |
| Melt temperature | 162 °C | ASTM D3418-15 |
| Water absorption | <0.1% by mass | ASTM D570-22 |
Storage in covered, dry conditions is recommended because polypropylene is hydrophobic and absorbs less than 0.1% water by mass when tested in accordance with ASTM D570-22. In twin-shaft compulsory mixers of 1.5 m³ capacity, the fiber is added to aggregate prior to water or cementitious slurry injection. This sequence reduces localized fiber clumping. Ready-mix operations following ASTM C94/C94M-22 typically add SikaFiber MFPP at the central plant. Job-site post-addition is operationally possible only if drum mixing continues for a minimum of 5 min at 15 rpm or higher; below this speed, dispersion can be incomplete and balling may occur in low-slump concrete.
Industrial slab-on-grade specifications replace welded wire mesh or light steel fiber with a dosage of 2.0 kg/m³ to 4.0 kg/m³. At these dosages, the fiber distribution provides three-dimensional crack restraint in random orientation. Acceptance is often based on average residual strength determined by ASTM C1399/C1399M-10 using steel plate-assisted loading. The applicable acceptance threshold should be derived from a flexural design calculation; generic specification limits without trial batch data are unreliable.
The primary differentiation is crack width at which reinforcement becomes effective. A micro synthetic polypropylene fiber with filament length between 12 mm and 19 mm and diameter between 25 µm and 60 µm controls plastic shrinkage cracking during the first 24 h after placement, but does not supply measurable residual flexural capacity at typical dosages below 1.5 kg/m³. In contrast, SikaFiber MFPP with 47 mm length and 400 MPa tensile strength bridges macro-cracks that form after hardening. Compared with fibrillated polypropylene macro fibers, the monofilament cross-section reduces manufacturing-related fibrillation and surface area, which improves uniform dispersion in low-slump concrete and reduces the tendency to form rope-like agglomerates in high-shear mixer discharge gates.
Compared with cold-drawn carbon steel fiber, SikaFiber MFPP has a density of 0.91 g/cm³ versus approximately 7.85 g/cm³ for steel, and possesses no corrosion mechanism in saline or chloride-containing concrete. The elastic modulus of 5.5 GPa is lower than the 200 GPa typical of steel fiber. Consequently, at equal volume fraction, steel fiber produces higher post-crack stiffness at small crack widths. Design substitution therefore requires flexural performance validation under ASTM C1609/C1609M-19a or ASTM C1399/C1399M-10 rather than a one-to-one dosage replacement by mass.
| Property | SikaFiber MFPP | Micro synthetic PP fiber | Carbon steel fiber |
| Fiber type | Macro monofilament | Micro monofilament or fibrillated | Cold-drawn hooked-end |
| Length | 47 mm | 12 mm–19 mm | 30 mm–60 mm |
| Diameter | 0.80 mm | 25 µm–60 µm | 0.5 mm–1.0 mm |
| Specific gravity | 0.91 g/cm³ | 0.91 g/cm³ | 7.85 g/cm³ |
| Tensile strength | 400 MPa | 300 MPa–500 MPa | 1000 MPa–1500 MPa |
| Elastic modulus | 5.5 GPa | 3.0 GPa–6.0 GPa | 200 GPa |
| Primary function | Post-crack macro-crack bridging | Plastic shrinkage crack mitigation | Structural post-crack load transfer |
| Corrosion mechanism | None | None | Surface staining possible |
| Typical concrete dosage | 2.0 kg/m³–6.0 kg/m³ | 0.6 kg/m³–1.8 kg/m³ | 20 kg/m³–40 kg/m³ |
In wet-mix shotcrete, dosage rates of 4.0 kg/m³ to 6.0 kg/m³ are common for ground support. Batching through a volumetric dosing unit calibrated to a batch error of ±0.1 kg/m³ maintains fiber content uniformity. Rebound loss during spraying is influenced by fiber length and mix consistency; macro monofilaments typically exhibit lower rebound than longer steel fibers at equivalent pump pressure, but published rebound percentage for this specific product under site-specific nozzle automation is limited. The fiber is also used in precast tunnel segments, where energy absorption criteria may be evaluated by round panel testing under ASTM C1550-12 or panel flexure testing under EN 14488-5:2006.
Polypropylene fibers melt at 162 °C. Under hydrocarbon fire exposure, the resulting voids within the cementitious matrix facilitate pressure relief and can reduce explosive spalling in high-strength concrete. Published post-fire residual strength data for SikaFiber MFPP under the RWS or hydrocarbon fire curve is limited; therefore spalling mitigation credit should be established through full-scale or panel fire testing rather than inferred from melt point alone. The product does not increase compressive strength and is not a substitute for primary flexural reinforcing steel unless performance-based flexural testing demonstrates equivalent ultimate capacity under ASTM C1609/C1609M-19a.
For structures exposed to prolonged ultraviolet radiation, a concrete cover of 15 mm or more prevents surface fiber oxidation. The polypropylene fiber itself resists most acids and alkalis, but the surrounding hydrated cement matrix degrades at pH below approximately 3. No pre-drying is required at relative humidities up to 80% because water absorption is negligible. Handling should avoid melt contamination from hot surfaces exceeding 162 °C during storage.
