Mon-Thu 8am-6pm, Fri 8am-5:30pm
New user? Create an account
FREE Expert Advice call 0800 542 44 28
Mon-Thurs 8:00am-6pm and
Friday 8:00am-5:30pm
RAJA Self-adhesive Reinforced Paper Tape 125gsm is a cross weave kraft reinforced paper tape used for sealing heavy cartons over 30kg in warehouse despatch, export, and industrial packing environments. Artificial hot melt rubber adhesive bonds on contact without water activation. A dispenser is required — this tape does not hand-tear. Cross weave filament reinforcement means this tape cannot be recycled in standard cardboard recycling streams.
125gsm Kraft paper reinforced paper packaging tape with cross weave filament. For cartons over 30kg where unreinforced paper tape reaches its limit.Artificial hot melt rubber adhesive. Dispenser required. Not recyclable — see gummed alternatives below if recyclability is a requirement.
Cross weave filament reinforcement means this tape will not tear cleanly by hand. Attempting to hand-tear produces a ragged split across the filament weave that wastes tape and leaves an uneven seal edge on the carton. A desktop or pistol-grip dispenser with a 76mm core is required for clean, consistent cuts. If your station currently uses lighter paper tapes by hand, fitting a compatible dispenser is a necessary step before switching to this product.
Minimum application temperature is 15°C. Cartons stored overnight in unheated areas can arrive at the packing bench surface-cold even when the room reads above 15°C — dense double-wall corrugated board holds cold longer than single-wall. Hot melt adhesive applied to cold board looks bonded but has not fully keyed into the board surface. At carton weights over 30kg, a partially bonded seal will fail at the first lift or palletisation stage. If your environment regularly drops below 15°C, reinforced water-activated gummed tape performs down to -20°C and is the more appropriate choice.
Hot melt adhesive achieves fast initial tack, but firm pressure across the full 48mm width within the first few seconds of laying takes the seal from initial contact to full bond strength. On heavy cartons, any section of the seal that has not fully bonded concentrates load stress at that point. Run the heel of your hand or a sealing roller firmly along the full run before moving the carton.
Multiple short tape sections applied across a seam create join points where unreinforced gaps between sections become the first failure location under load. One continuous run of reinforced paper packing tape across the full seam length — including overlap onto the carton sides at each end — is the correct method. The cross weave filament only provides its full bi-directional strength as a continuous run, not as overlapping short pieces. On cartons subject to rough transit handling, a second run across the base seam perpendicular to the first adds further resistance at the highest-stress point of the carton.
Shelf life is 6 months under correct conditions — 15-25°C, below 65% relative humidity, stored horizontally. This is 3 months shorter than the lighter paper tapes in this range. Hot melt adhesive stored above 25°C can experience adhesive migration that reduces tack consistency across the roll. At carton weights over 30kg, adhesive degradation that might hold a lighter load will fail. Mark incoming stock with receipt date and use oldest rolls first.
This tape is built for speed of application on heavy cartons where recyclability is not a requirement. If your operation needs recyclability, a cold-temperature rating, or alighter load specification, one of the options below is a better fit.
Reinforced paper packing tape is a self-adhesive Kraft paper tape strengthened withfilament reinforcement — in this case, a cross weave pattern that runs in two directions across the backing. The cross weave distributes seam stress bi-directionally, preventingthe longitudinal splitting that unreinforced paper tape shows on cartons over 30kg. It usesartificial hot melt rubber adhesive that bonds on contact without water activation, andrequires a dispenser rather than hand-tear.
Mono filament reinforcement runs in a single direction — typically along the tape length.Cross weave filament runs in two directions, along the length and across the width. On acarton seam under load, stress is applied in multiple directions simultaneously. Cross weaveresists that multi-directional stress more effectively than mono filament, which can splitlaterally under torsional load even when the longitudinal threads hold. For cartons over 30kg subject to rough handling or transit vibration, cross weave is the stronger construction.
No. Reinforced paper tape self adhesive construction — where filament reinforcement isbonded into the paper backing — cannot be separated at disposal and is not accepted instandard cardboard recycling streams. If recyclability is a requirement on cartons over 30kg, reinforced water-activated gummed paper tape is the correct alternative: glass fibre reinforced, 100% recyclable with the box, and tamper-evident. It requires a WAT dispenser rather than self-adhesive application.
Cross weave filament reinforcement is designed to resist tearing under load — whichis exactly the property that makes it impossible to tear cleanly by hand. Attempting tohand-tear produces a ragged diagonal split across the filament weave, wasting tape andleaving a frayed edge on the carton seam. A desktop or pistol-grip dispenser with a 76mmcore produces a clean, consistent cut on every seal. If hand-tear is a requirement at yourstation, the 70gsm or 80gsm unreinforced tapes are the correct choice.
The key difference is adhesive activation and recyclability. Self adhesive reinforced paper tape bonds on contact without water — faster to apply and requires no WAT dispenser infrastructure. Reinforced gummed tape uses a water-activated plant-based adhesive thatpenetrates the board fibres on activation, creating a stronger permanent bond and atamper-evident seal. Reinforced gummed tape is also 100% recyclable with the box. Foroperations where recyclability and tamper-evidence are priorities on heavy cartons,reinforced gummed tape is the more appropriate specification.
The minimum application temperature is 15°C. Artificial hot melt rubber adhesive doesnot achieve full bond strength below this threshold. Dense double-wall corrugated boardused for heavy cartons retains cold longer than single-wall — a carton surface can readbelow 15°C even when the room temperature is above it. For cold environments below 15°Cthat require reinforced sealing on heavy cartons, reinforced water-activated gummed tapeperforms down to -20°C and is the more appropriate choice.
For cartons over 30kg, one continuous run across the full seam length — plus 50-75mmoverlap onto the carton sides at each end — is the minimum correct application. Multipleshort sections create join points where unreinforced gaps become the first failure locationunder load. On cartons subject to rough transit handling, a second run perpendicular to thefirst across the base seam adds further bi-directional resistance at the highest-stresspoint of the carton.
