3M 5451 PTFE Glass Cloth Tape
- Product Name: 3M 5451 PTFE Glass Cloth Tape
- Factroy Site: Yinchuan, Ningxia, China
- Price Inquiry: sales8@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
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- 3M 5451 PTFE Glass Cloth Tape is typically used in formulations when surface release, dielectric strength, and thermal stability and continuous service temperature, chemical exposure, and mechanical stress must be controlled within specific ranges.
| HS Code | 217385 |
| Product Name | 3M 5451 PTFE Glass Cloth Tape |
| Brand | 3M |
| Product Id | 5451 |
| Backing Material | PTFE-impregnated glass cloth |
| Adhesive Type | Silicone |
| Total Thickness | 6.5 mil (0.165 mm) |
| Backing Thickness | 5.3 mil (0.135 mm) |
| Adhesive Thickness | 1.2 mil (0.030 mm) |
| Color | Brown |
| Temperature Range | -100°F to 500°F (-73°C to 260°C) |
| Tensile Strength | 100 lb/in (17.5 N/cm) |
| Elongation At Break | 5% |
| Adhesion To Steel | 30 oz/in (8.2 N/25 mm) |
| Dielectric Strength | 7000 V |
| Chemical Resistance | Excellent |
| Flame Retardant | Yes |
| Ul Listing | UL 510 |
| Available Length | 36 yd (32.9 m) |
| Core Diameter | 3 in (76.2 mm) |
As an accredited 3M 5451 PTFE Glass Cloth Tape factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 3M 5451 PTFE Glass Cloth Tape is individually boxed as one roll, with 12 rolls per case. |
| Container Loading (20′ FCL) | 20′ FCL: 3M 5451 PTFE Glass Cloth Tape rolls palletized, shrink-wrapped, strapped, evenly loaded, weight-balanced, and secured for ocean transport. |
| Shipping | Shipping Description: 3M 5451 PTFE Glass Cloth Tape is not classified as dangerous goods. No UN number, hazard class, or packing group required. Transport in original sealed packaging, kept dry and clean, away from extreme heat, moisture, and physical damage. Observe all applicable local, national, and international shipping regulations. |
| Storage | Store 3M 5451 PTFE Glass Cloth Tape in its original packaging in a clean, dry, well-ventilated area. Keep away from direct sunlight, heat, moisture, solvents, oils, and dust. Maintain moderate room temperature, ideally 15–30°C; avoid freezing or extreme conditions. Store rolls flat or on edge, prevent compression or damage. Rotate stock, use oldest first, and inspect before use. |
| Shelf Life | Store in original packaging at 21°C (70°F) and 50% RH; shelf life is 5 years from date of manufacture. |
Heat-Sealing Jaw Face Application on Polyolefin Form-Fill-Seal Tooling
In vertical form-fill-seal and horizontal pouch machinery, 3M 5451 is applied to the heated sealing jaw to prevent low-density polyethylene and linear low-density polyethylene melt adhesion during dwell. The tape construction is a PTFE-coated woven glass cloth backing of 0.14 mm (5.5 mil) total thickness with a pressure-sensitive silicone adhesive, rated for continuous heat exposure up to 260 °C. For 40–80 µm LLDPE film at a jaw setpoint of 150–190 °C, sealing pressure of 0.4–0.8 MPa, and dwell of 0.5–1.5 s, the PTFE surface prevents hot-tack deposits on the jaw face while the glass cloth resists compressive deformation. The tape is installed over a clean, solvent-wiped jaw with a butt splice or 3–5 mm overlap; an overlap creates a harder ridge that can mark thin film. Adhesive transfer occurs if jaw surface temperature exceeds 204 °C at the adhesive line or if dwell exceeds 1.8 s at 200 °C on constant-heat equipment. Because aluminium sealing jaws expand more than the glass cloth backing during each thermal cycle, the adhesive bond is subjected to cyclic shear; jaw surface roughening to Ra 1.6–3.2 µm and edge sealing with a mechanical clamp extend service intervals. The PTFE resin component meets FDA 21 CFR 177.1550 for use as a non-food-contact release surface, but the silicone adhesive layer is not a direct food-contact material and must be positioned outside the package sealing zone. Terminal products include frozen vegetable pillow pouches, medical device chevron pouches, and stand-up retort pouches where the outer seal is produced on rotary band sealers running at 8–15 m/min.
| Film substrate | Film thickness | Jaw setpoint | Sealing pressure | Dwell | Observed failure mode without PTFE release cloth |
|---|---|---|---|---|---|
| LDPE blown film | 50 µm | 150–165 °C | 0.4–0.6 MPa | 0.5–0.8 s | melt string-out and jaw contamination at cycle rates above 40 pouches/min |
| LLDPE cast film | 70 µm | 175–190 °C | 0.6–0.8 MPa | 0.8–1.2 s | hot-tack tearing and seal edge shark-skin |
| HDPE film | 60 µm | 155–175 °C | 0.5–0.7 MPa | 0.6–1.0 s | oxidative gel deposition on jaw after 2 h run |
Autoclave vacuum-bag sealing for carbon/epoxy prepreg uses 3M 5451 along bag seams, tool flanges, and through-bag feed-through collars rather than directly on the uncured laminate when maximum release purity is required. During a standard 177 °C cure at 0.7 MPa autoclave pressure and 0.85 bar vacuum debulk, the PTFE-coated glass cloth resists wrinkling under compaction and does not transfer fluoropolymer particles into the peel ply. The silicone adhesive remains pressure-tight at the bag-to-tool interface, but at temperatures above 204 °C edge creep and silicone transfer can occur, particularly on tooling with surface roughness below Ra 0.8 µm. Application is performed by wiping the flange with methyl ethyl ketone or isopropanol, wiping the bag film with dry polyester cloth, and applying the tape with 50% overlap at the seam; subsequent vacuum drop tests to 0.85 bar are used to locate leaks. The woven glass cloth resists bag bridging at concave radii larger than 6 mm; below that radius the tape must be pie-cut or replaced with a non-woven release film. If silicone contamination is prohibited on Class A composite tool surfaces, the tape is restricted to bag seams outside the laminate perimeter and a non-silicone polyester flash breaker is used on the laminate edge. Terminal parts include cured aircraft wing ribs, carbon-fibre ductwork, and hollow composite tooling mandrels where the tape remains on the tool flange after demolding and is removed with a plastic scraper followed by acetone wipe.
Wire Harness Overwrap Prevents Insulation Wall Loss at High-Chafe Locations
Engine and airframe wire harnesses use 3M 5451 as an overwrap over PTFE-insulated wires, braided sleeving, and convoluted tubing in high-chafe locations. The tape is wound with 50–66% overlap and back-tension of 2–4 N/cm to prevent glass cloth tearing at cable bend radii below 10× cable diameter. Under continuous thermal load at 180–220 °C, the silicone adhesive maintains peel strength without brittle char, but a temperature excursion past 260 °C causes backing darkening and adhesive embrittlement. Dielectric behavior is evaluated according to ASTM D149; for a 0.14 mm composite, breakdown generally exceeds 8.0 kV depending on electrode configuration and humidity conditioning, though published data for this specific configuration is limited and lot-specific testing is required. Abrasion resistance is assessed in harness qualifications under SAE AS4373 rather than a single universal test; the tape is positioned as the sacrificial outer layer that prevents insulation wall loss on PTFE and ETFE primary wire. It is not a substitute for extruded fluoropolymer insulation and must not be spliced with polyimide tape in high-vibration regions because differential thermally induced stiffness causes edge lifting. Terminal service includes military ground-vehicle engine harnesses, aircraft landing-gear bundles, and industrial turbine sensor cables where chafing against metal brackets is the dominant failure mode.
For chlor-alkali plant flange faces, valve bonnets, and pipe support saddles exposed to hydrochloric acid vapour and sodium hydroxide splash, 3M 5451 functions as an external PTFE barrier rather than an immersion liner. The PTFE surface shows mass change below 1% after 7-day immersion in 37% HCl at 25 °C per ASTM D543; similar resistance is observed in 50% NaOH at 25 °C for 7 days. The silicone adhesive has lower chemical resistance, so the wrapped edge must be sealed with a fluoropolymer overboot or mechanically clamped to prevent capillary wicking into the glass cloth. The tape must not be used for immersion service, full-penetration flanges with continuous liquid contact, or exposure to metallic sodium, fluorine gas, or sodium naphthalenide etchant, because those media attack PTFE and degrade the adhesive. Application on carbon steel requires surface preparation to Sa 2.5 per ISO 8501-1, followed by solvent degreasing and tape application with 50% spiral overlap; loose edges are secured with stainless steel banding. Terminal installations include chlorine header flanges, acid scrubber duct flanges, and caustic transfer pipe saddles where PTFE tape reduces corrosion under insulation at service temperatures up to 120 °C continuous for the adhesive bond.
| Chemical medium | Concentration | Test condition | Backing result per ASTM D543 | Adhesive limitation |
|---|---|---|---|---|
| Hydrochloric acid | 37% | 25 °C / 7 days | mass change below 1% | edge wicking after 48 h if unsealed |
| Sodium hydroxide | 50% | 25 °C / 7 days | no visible surface change | silicone softens above 80 °C immersion |
| Methyl ethyl ketone | 99% | 25 °C / 24 h | no dissolution, slight discoloration | adhesive swell causes edge lift |
| Sodium hypochlorite | 12% available chlorine | 50 °C / 7 days | no PTFE weight loss | glass cloth wicks chloride into adhesive |
When Roller Wrap and Adhesive Web Transfer Interrupt Coating Line Tension Control
Flexographic printing and adhesive coating lines experience idler-roller wrap when web surfaces carry exposed pressure-sensitive adhesive, high-tack coatings, or silicone release liners. 3M 5451 is applied to steel idler rollers in a single continuous spiral with zero overlap because any overlap ridge imprints the coated web at line tensions above 2.0 N/cm. The 0.14 mm tape build increases roller radius by 0.14 mm, which alters the web path length enough to require tension loop recalibration and re-zeroing of the load cells before re-start. The kinetic coefficient of friction against polished 304 stainless steel, measured per ASTM D1894, remains below 0.25, preventing tacky edge pick-up from label stock and reducing fold-over at winding. On high-speed slitting and coating lines operating above 300 m/min, edge lifting occurs if the roller dynamic balance is outside ISO 1940-1 grade G 2.5; wrap direction must be opposite to roller rotation to avoid peel initiation at the tape leading edge. The silicone adhesive withstands continuous roller surface temperatures up to 150 °C on drying sections, but solvent exposure to methyl ethyl ketone or ethyl acetate can soften the adhesive and cause edge flagging; use fluoropolymer shrink sleeves for rollers fully immersed in solvent-laden enclosures. Terminal applications include pressure-sensitive label coating lines, tape slitting winders, and hot-melt slot-die idlers where release liner static wrap is a process bottleneck.
What Limits Silicone-Adhesive PTFE Glass Cloth in Powder Coating Cure Ovens?
Powder coating cure ovens cycling between 190 °C and 205 °C for 10–20 min use 3M 5451 to mask machined seats, threaded studs, grounding pads, and bearing bores from cured powder deposition. The PTFE surface blocks powder adhesion while the woven glass cloth withstands repeated oven cycles without brittle fracture at the masking fold line. The tape is removed after the part cools below 60 °C; hot removal can smear silicone adhesive on steel or aluminium substrates. The product is suitable for dry powder operations and e-coat oven masking where solvent contact is minimal, but it is not intended for wet paint immersion or acidic anodizing tanks because electrolyte wicks into the glass cloth and causes adhesive residue. Compliance is supported by the backing’s PTFE resin status under FDA 21 CFR 177.1550 and the tape assembly under REACH and RoHS 2011/65/EU restrictions, although specific article-level declarations require lot confirmation. Masking designs should position the tape edge at least 2 mm outside the critical machined feature to prevent adhesive bleed during thermal expansion. Terminal components include architectural aluminium extrusions, automotive cast brackets, and agricultural equipment housings where overspray must be excluded from threaded assembly interfaces.
On bakery conveyor discharge guides handling high-sugar glazes and frozen dough portions, sticky transfer layers stop product release and increase scrap at the freezer infeed. 3M 5451 applied to stainless steel guide rails and ploughs reduces sugary deposit adhesion at process temperatures from -20 °C to 150 °C; the silicone adhesive holds on stainless steel after repeated washdown with alkaline cleaners up to pH 11, though repeated exposure at 80 °C for more than 50 cycles may cause edge frothing and requires replacement. The PTFE backing meets FDA 21 CFR 177.1550 for use as a non-food-contact release surface, while the silicone adhesive must be prevented from direct product contact by design; the tape is therefore applied only to guide rails, diverters, and scrapers that do not touch the food material directly. Clean-in-place nozzles operating at 40–60 bar can lift the tape if the leading edge is not covered by a stainless steel clamp; installations on wet sections should use a mechanical retaining strip. Terminal operations include frozen dough portion lines, chocolate enrobing discharge guides, and confectionery cooling belts where sticky sugar films otherwise accumulate on naked metal surfaces.
Competitive 3M 5451 PTFE Glass Cloth Tape prices that fit your budget—flexible terms and customized quotes for every order.
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- 3M 5451 PTFE Glass Cloth Tape is manufactured under an ISO 9001 quality system and complies with relevant regulatory requirements.
- COA, SDS/MSDS, and related certificates are available upon request. For certificate requests or inquiries, contact: sales8@ascent-chem.com.
3M 5451 PTFE Glass Cloth Tape is a pressure-sensitive adhesive composite constructed from 0.076 mm (3.0 mil) PTFE-impregnated woven glass cloth, a 0.064 mm (2.5 mil) silicone adhesive layer, and a representative total thickness of 0.14 mm (5.5 mil). The product is supplied in 33 m log rolls and converted to application width. Under ASTM D3759, representative tensile strength is 175 N/100 mm (100 lb/in) and elongation at break is 5%. Peel adhesion to steel under ASTM D3330 Test Method A is listed at 4.4 N/10 mm (40 oz/in). Dielectric strength under ASTM D149 is listed at 9000 V for a single layer. The listed continuous operating temperature range is −73 °C to 260 °C. These values are representative manufacturer data and are not specification limits; batch-to-batch adhesive coating weight, glass cloth weave density, and environmental conditioning influence measured results.
When a Release Surface Must Withstand Repetitive Thermal Cycling
Heat-sealing lines using rotary sealers, platen sealers, L-bar sealers, and linear impulse sealers install the tape over the heated jaw or sealing element. For low-density polyethylene, jaw surface temperature is typically set between 120 °C and 205 °C; barrier laminates and cast polypropylene may require 150 °C to 220 °C. Dwell time on form-fill-seal equipment is usually 0.3 s to 2.5 s, depending on film gauge and jaw pressure. The tape presents a low-surface-energy PTFE face to the polymer melt; static coefficient of friction for PTFE surfaces tested under ASTM D1894 is commonly reported in the 0.05 to 0.20 range depending on load, speed, and substrate roughness. The 5% elongation at break under ASTM D3759 limits linear distortion during cyclic heating, and the glass cloth structure resists cut-through when particulate contamination is present on the web. Silicone adhesive maintains continuous service only within the listed 260 °C upper boundary; adhesive transfer to jaws is observed when jaw surface exceeds the listed limit or when oxide layers are not removed. Mounting on curved surfaces below 25 mm radius can produce lifting at the edges because the glass cloth is dimensionally stable but not highly conformable.
Release behavior is not a fixed surface property; it depends on hot-melt polymer composition, melt temperature, dwell time, and jaw surface finish. PTFE has a relatively low surface energy, often reported near 18–20 mN/m by contact-angle methods, which reduces wetting by molten polyolefins. Release force is not commonly specified by a single ASTM method for heat-seal tapes; users can screen candidate tapes using ASTM D1894 coefficient of friction and a heated-platen release fixture. Published data for the specific release force of 3M 5451 against polyethylene are limited.
Dimensional stability during heating is related to the glass cloth weave and the PTFE impregnant. Woven glass cloth has a low coefficient of thermal expansion compared with unfilled PTFE and polyester carriers, so the tape exhibits less cockling or lifting under heated-jaw cycling. At the upper continuous limit of 260 °C, the silicone adhesive begins to harden; published data for the specific activation energy of adhesive degradation in this configuration are limited. In intermittent heat-seal service, the tape is replaced after visual exposure of glass threads or after edge lift creates a visible gap along the jaw length, because exposed glass can scratch the sealing element and trapped film can carbonize on the jaw surface.
Electrical insulation and release duties overlap in motor-coil taping, transformer lead isolation, and formed-wire harness wrapping. The representative dielectric strength of 9000 V under ASTM D149 is a single-thickness value; a system-level insulation value is derived from layer count, butt-gap spacing, tension, and void content. PTFE contributes a low dielectric constant near 2.1 at 1 MHz per published fluoropolymer data; the woven glass cloth creates a two-phase dielectric composite, so the tape is not electrically homogeneous. Partial-discharge inception voltage in high-voltage windings depends on edge quality, and edge fraying from dull slitting blades creates corona points. For machine-taped coils, closed-loop tension control is required because the 175 N/100 mm tensile strength under ASTM D3759 defines the upper tension boundary; operating tension is generally maintained below 50% of the listed breaking strength to avoid adhesive shear and backing fracture. A rotary shear with fresh blades is specified for converting; crush cutting is not preferred because glass filaments are exposed at the cut edge.
| Property | Test Method | Representative Value |
|---|---|---|
| Total thickness | ASTM D3652 | 0.14 mm (5.5 mil) |
| Backing thickness | ASTM D3652 | 0.076 mm (3.0 mil) |
| Adhesive thickness | ASTM D3652 | 0.064 mm (2.5 mil) |
| Tensile strength | ASTM D3759 | 175 N/100 mm (100 lb/in) |
| Elongation at break | ASTM D3759 | 5% |
| Peel adhesion to steel | ASTM D3330 Test Method A | 4.4 N/10 mm (40 oz/in) |
| Dielectric strength | ASTM D149 | 9000 V |
| Continuous operating temperature | Manufacturer data | −73 °C to 260 °C |
The primary differentiation from skived PTFE film tape is the woven glass cloth carrier. Unsupported skived PTFE tape typically exhibits elongation well above 50%; 3M 5451 reduces elongation to 5% under ASTM D3759, which improves dimensional stability in tensioned web applications. Compared with polyimide tape, the PTFE surface provides a lower coefficient of friction under ASTM D1894 and a similar upper continuous temperature limit, but the silicone adhesive restricts use in silicone-sensitive coating or painting operations. Polyester pressure-sensitive tapes are generally limited below 130 °C continuous service. Among fluoropolymer tapes, 3M 5451 is not a skived PTFE film product; it is specified where cut-through resistance, tensile strength, and dimensional stability dominate over conformability and minimum thickness. Adjacent 3M 545x glass cloth products differ in total thickness and mechanical strength; published data for direct substitution of 5451 with other 545x products are limited, and replacement should be verified against total thickness, dielectric strength, adhesion, and operational temperature requirements.
The 5451 designation identifies a specific backing/adhesive combination within the 3M fluoropolymer tape series. The first digit grouping denotes PTFE glass cloth construction; the adhesive type is silicone. Thicker or thinner 545x products are used when total tape thickness must match a slot depth or when higher breaking strength is required. Substitution of 5451 with 5453 or 5455 without verifying total thickness and dielectric strength can alter jaw heat transfer and insulation layer thickness. In heat-seal service, total thickness affects heat transfer rate; replacing a 0.14 mm tape with a thicker construction increases thermal resistance and can shift the required jaw temperature upward. Published data for the specific thermal conductivity of 3M 5451 are limited.
What Limits the Use of Silicone-Adhesive PTFE Glass Cloth in Solvent-Rich Environments?
The silicone pressure-sensitive adhesive layer is the most solvent-sensitive component. Aromatic hydrocarbons such as toluene and xylene can swell or plasticize the adhesive, reducing peel strength measured under ASTM D3330 Test Method A; repeated solvent exposure can produce edge lifting even though the PTFE backing is chemically resistant. Aggressive alkaline cleaning agents and molten alkali metals must not contact the tape. Sodium naphthalenide etchant, which is used to prepare PTFE surfaces for bonding, attacks the fluoropolymer backing. Operation above 260 °C is outside the listed continuous range; overheating can generate decomposition products and embrittle the silicone adhesive. In solvent-rich coating lines, cut edges should be sealed or trimmed after installation because exposed glass cloth can wick low-viscosity process fluids. The product is not suitable as a release surface in silicone rubber molding, silicone ink systems, or conformal coating operations where silicone contamination is a critical defect; a non-silicone adhesive fluoropolymer tape is required for those boundary conditions.
Silicone pressure-sensitive adhesives are selected for high-temperature tack retention and low peel-rate sensitivity, but they exhibit lower room-temperature shear strength than some acrylic or rubber adhesives. The tape should not be relied on as a load-bearing structural bond. In overhead or vertical heated-platen applications, edge lifting is controlled by mechanical clamping or by using a mechanical wrap terminator. The continuous operating range of −73 °C to 260 °C applies to the adhesive/backing system, but low-temperature application below 10 °C is discouraged because initial tack decreases.
Field performance on production lines is limited more often by converting damage and application defects than by bulk tape properties. Edge fraying is the dominant failure mode in roll-to-roll converting; slitting with dull rotary blades produces glass-filament protrusions that can generate corona loss and particulate contamination. Shear slitting with fresh blade sets at controlled engagement depth reduces edge damage; crush cutting is not recommended. Tension excursions above the 175 N/100 mm breaking strength under ASTM D3759 produce immediate tensile fracture, while sustained tension near the breaking strength can cause adhesive creep and step-off. The silicone adhesive requires clean, dry metal surfaces; degreasing with isopropanol or heptane followed by drying is standard before laydown. Substrates below 38 dyn/cm wetting tension tested under ASTM D2578 show measurable reductions in peel adhesion under ASTM D3330.
Documentation for 3M 5451 may include RoHS substance declarations and, where applicable, FDA 21 CFR 177.1550 eligibility for the PTFE component. Adhesive compliance is evaluated separately because silicone pressure-sensitive adhesives are not automatically covered by fluoropolymer food-contact listings. REACH SVHC declarations are lot-dependent and must be confirmed against the supplier certificate. Users requiring electrical insulation recognition under UL or IEC systems should request the manufacturer’s UL Yellow Card or equivalent test report; published data for this specific configuration is limited. RoHS restricted substance compliance is typically assessed by lot-level supplier documentation, not by a single tape-level test method.
Unopened rolls stored at 21 °C and 50% RH in original packaging generally retain pressure-sensitive properties within the stated shelf life; humidity above 60% RH does not hydrolyze the PTFE backing but can promote edge contamination. Cut rolls should be stored flat or suspended, not on end, to prevent adhesive blocking and edge damage.
