| HS Code | 840970 |
| Appearance | Milky white viscous liquid |
| Viscosity | 1500-2500 mPa·s at 25°C |
| Solid Content | 45% ± 2% |
| Ph Value | 7.0-8.0 |
| Adhesive Strength | ≥ 3.0 N/cm (foam-cloth laminate) |
| Curing Time | 24 hours at room temperature |
| Application Temperature | 10°C to 40°C |
| Heat Resistance | -20°C to 80°C |
| Water Resistance | Excellent after full curing |
| Flexibility | High flexibility, suitable for soft foam and cloth |
| Voc Content | ≤ 5% |
| Storage Stability | 6 months in sealed original container at 5-35°C |
As an accredited Foam/Cloth Complex Special Adhesive(FH-II) factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied in 20 kg sealed plastic pails with inner lining, ensuring safe, leak-proof storage and easy handling for industrial use. |
| Container Loading (20′ FCL) | 20′ FCL loading: FH-II adhesive packed in drums/pails, palletized, secured, with proper ventilation and segregation to prevent spillage. |
| Shipping | Foam/Cloth Complex Special Adhesive (FH-II) ships in sealed, leak-proof containers, secured upright to prevent spillage. Avoid exposure to high heat, moisture, and direct sunlight during transit. Standard ground freight applies; air or sea transport may require dangerous goods documentation. Ensure proper ventilation and compliance with local chemical shipping regulations. |
| Storage | Store in a tightly sealed container in a cool, dry, well-ventilated area. Keep away from direct sunlight, heat sources, and open flames. Avoid moisture and humidity to prevent deterioration. Maintain temperature between 5–25°C. Under recommended conditions, shelf life is typically six months from production date. |
| Shelf Life | Shelf life: 12 months from production date when stored unopened in a cool, dry place. Use before expiry. |
In specifying FH-II for production-scale foam-to-cloth lamination, the adhesive is treated as a one-part, solvent-borne polyurethane laminating adhesive with a manufacturer-defined solid content, viscosity, and flash-off profile. Published data for this exact designation is limited; processing parameters given below derive from publicly available industrial practice for this adhesive class and must be verified against the batch certificate of analysis and a line-specific trial. The downstream segments that follow are separated by market and process intensity rather than by generic adhesion type. As a one-part system, no mixing ratio applies; thinning is generally not recommended beyond 5 % by weight with the formulator-approved thinner because excess solvent depresses flash-off efficiency and increases penetrating strike-through on lightweight knits. The adhesive should not be combined with amine-based additives or substrates carrying unreacted amine residues, as premature crosslinking in the wet film reduces open time and can gel the roller coater pan.
| Standard or regulation | Test condition or requirement | Relevance to FH-II composite |
|---|---|---|
| REACH Regulation (EC) No 1907/2006 | SVHC candidate list content < 0.1 % w/w per article | Verification of adhesive film remaining in imported laminate |
| RoHS Directive 2011/65/EU Annex II | Pb, Cd, Hg, Cr(VI), PBB, PBDE not intentionally added | Electrical and electronic acoustic panel applications |
| FMVSS 302 | Horizontal burn rate ≤ 102 mm/min | Automotive seat knit/foam laminate |
| California Technical Bulletin 117-2013 Section 1 | Smoldering resistance of upholstered composite | Furniture foam/fabric panels |
| ISO 11339:2022 | T-peel adhesion, 100 mm/min jaw speed | Bond quality of foam-to-fabric laminates |
| ASTM D903-98(2017) | Stripping strength of adhesive bonds | Mattress panel delamination checks |
High-volume seat cover lamination with FH-II is performed on engraved-roll coating lines where the adhesive is coated onto the reverse side of polyester or nylon knit cover fabric before contact with pre-flamed polyether urethane foam. Wet application weight is typically held between 30 g/m² and 80 g/m² depending on fabric stitch density and foam cell openness; denser tricot knits above 180 g/m² tend toward the upper end under laboratory peel validation. The drying tunnel is operated at 60 °C to 90 °C zone temperatures for 2 min to 5 min residence time, with residual solvent monitored at the laminating nip not to exceed 0.15 % by total composite mass. Nip pressure is set between 3 bar and 6 bar on a pair of 300 mm-diameter pneumatically loaded rollers; lower nip pressures below 3 bar produce intermittent foam tear during post-cure tensile checks. After lamination, rolls are aged at 20 °C to 25 °C for 24 h to 72 h before die cutting. T-peel adhesion is tested according to ISO 11339:2022 with a jaw separation speed of 100 mm/min; acceptable failure mode is cohesive fracture within the foam substrate rather than interfacial adhesive release. For compliance in passenger car cabin interiors, the finished laminate is evaluated to FMVSS 302 horizontal burn rate, and the adhesive formulation must not contribute to fogging condensate above 2 mg under DIN 75201:2011-11 gravimetric fogging procedure B. Observed production bottlenecks include viscosity rise in the coating pan when solvent evaporation is uncontrolled, leading to over-coating of foam peaks and visible strike-through on the face of the cover fabric. Terminal products include seat inserts, backrest panels, headrest covers, and armrest laminates.
When FH-II is used to bond flame-retardant woven polyester upholstery fabric to polyurethane foam of 16 kg/m³ to 25 kg/m³ density, the open time between adhesive application and nip contact becomes the dominant variable for final crush recovery. The adhesive is applied to the fabric back by knife-over-roll at 40 g/m² to 100 g/m² wet; after solvent flash at 20 °C to 25 °C and 55 % to 65 % relative humidity for 2 min to 8 min, the coated fabric enters the combining station. If open time exceeds 8 min, surface tack declines and the cured laminate shows edge lift along framed seat decks and arm pads. If open time is shorter than 2 min, retained solvent becomes trapped between foam and fabric, producing soft bond lines and dimensional instability after the panel is cut. The combined web is cold-pressed at 0.3 MPa to 0.5 MPa for 8 h to 24 h in stack presses to develop room-temperature crosslinking. Crush resistance is not tested directly on the adhesive film; the upholstered panel is conditioned for 24 h at 23 °C and 50 % relative humidity and then subjected to repeated compression cycles on a 150 mm circular indentor. For furniture sold in California, the finished article must meet California Technical Bulletin 117-2013 Section 1 smoldering resistance; the adhesive must be applied within the coverage tolerance that avoids pooling at seam allowances, because concentrated adhesive zones can act as additional fuel in the smolder path. Production-scale observations show that manual spray application creates batch-to-batch variation of ± 15 % in wet add-on; transfer roller application reduces this variation to ± 5 %. Terminal applications include kiln-dried hardwood frame padding, high-resilience seat cushions, and button-tufted chair backs.
In footwear upper fabrication, FH-II functions as a two-surface contact adhesive applied at 25 g/m² to 45 g/m² dry to both the foam surface and the textile substrate. The coated surfaces are force-dried in a forced-air tunnel at 55 °C to 65 °C for 3 min to 5 min, then heat-reactivated at 60 °C to 75 °C infrared panels immediately before combining. Press dwell is maintained at 10 s to 20 s under 0.4 MPa to 0.6 MPa flat-bed pressure. Bond performance is assessed under SATRA TM 411 peel after 24 h conditioning at 23 °C and 50 % relative humidity; the expected failure mechanism on open-cell polyurethane foam of 8 mm to 12 mm thickness is foam destruction. A critical processing limit appears when the strobel board contains residual silicone-based release agents; silicone contamination reduces initial tack and causes adhesive delamination from the board side at loads below 1.5 N/mm in peel. Pre-cleaning with a solvent wipe or corona treatment at 1.0 kW to 1.5 kW across 30 cm width restores wetting. Temperature below 55 °C during reactivation increases the risk of frozen strain in the foam layer after cooling, which is detected as curl in the finished quarter panel. The bonded footwear components are further processed through high-frequency welding and sole attachment without adhesive film softening if the softening point of the cured FH-II film is above 100 °C. Terminal parts include padded collars, tongue foam assemblies, and strobel-stitched lasting margins where the textile is a nonwoven or mesh.
Bonding flame-retardant woven polyester ticking to convoluted polyether urethane foam for mattress panels places the adhesive in direct proximity to an open-flame compliance path under 16 CFR Part 1633. In this configuration FH-II is rotogravure-applied in a discontinuous dot pattern using a 60 line/cm to 90 line/cm screen roll; dry coating weights range from 12 g/m² to 28 g/m² because full-surface coating reduces the air permeability of the panel and changes the mattress burn propagation profile in full-scale testing. The adhesive must be dried below 0.10 % residual solvent before combining with foam, and the laminated web is passed through a cooling can at 15 °C to 20 °C before winding to prevent blocking in the roll. Peel adhesion is evaluated after 72 h at 23 °C and 50 % relative humidity using ASTM D903-98(2017) tensile stripping; failure is considered acceptable when foam substrate tear occurs across at least 90 % of the specimen width. Flame-retardant-treated fabric surfaces often contain antimony-halogen finishes that can inhibit moisture cure in one-part polyurethane systems; if the batch certificate shows a surface pH below 5.0, a pre-lamination trial is required before production approval. Terminal products are mattress quilt panels, border foam laminates, and bed-in-a-box compression wraps.
For medical positioning pads and orthopaedic soft goods, FH-II bonds closed-cell polyethylene foam or open-cell polyurethane foam to polyester or nylon loop-laminated fabric. The production line applies adhesive by roll coater at 30 g/m² to 50 g/m² wet, then passes the coated web through a drying tunnel at 70 °C to 85 °C for 4 min to 6 min. After lamination, the composite is die-cut and assembled into straps, limb positioners, and table pads. Because the finished device can be sterilised by ethylene oxide, the cured adhesive film is tested for dimensional change and bond retention after one exposure cycle of 600 mg/L ethylene oxide at 54 °C and 70 % relative humidity for 4 h, followed by aeration for 24 h at 40 °C. Peel adhesion before and after sterilisation is compared under ISO 11339:2022; bond strength retention below 80 % indicates insufficient crosslinking or incomplete solvent removal during lamination. The adhesive must not contain natural rubber latex proteins, and the manufacturer's declaration is reviewed against ISO 10993-5:2009 cytotoxicity data supplied by the formulator. Terminal products include radiolucent foam pads, MRI-safe positioning wedges, and wheelchair cushion fabric-to-foam covers.
Acoustic panel production applies FH-II through a six-roll gravure coater at 18 g/m² to 35 g/m² wet in a discontinuous pattern to limit acoustic degradation of the panel face. The substrates are open-cell melamine foam or polyurethane foam and an acoustically transparent polyester fabric or nonwoven scrim. After drying at 65 °C to 80 °C for 3 min to 5 min, the coated web is calendered at 2 bar to 4 bar nip pressure and 40 °C to 60 °C roll temperature. Insertion-loss testing of the finished panel is conducted in a reverberation room according to ISO 354:2003; the adhesive coverage pattern must not block surface pores to the point that the normal-incidence sound absorption coefficient below 500 Hz falls by more than 10 % relative to uncoated foam. Fire performance for public-space wall and ceiling panels is typically evaluated under EN 13501-1:2018; the adhesive contributes less than 10 % by mass to the composite and must not drip during the single burning item test. Terminal products are office partition panels, ceiling baffles, and engine bay acoustic wraps where the fabric serves as a protective facing.
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Foam/Cloth Complex Special Adhesive(FH-II) is a solvent-borne polyurethane-modified polychloroprene adhesive formulated for continuous lamination of open-cell polyurethane foam, polyester nonwoven, jute, and woven or knitted upholstery fabrics. The product is classified under model FH-II and is supplied as a light amber liquid with a nominal solids content of 38–42 wt%. Application viscosity is specified as 2,500–4,500 mPa·s at 25 °C, measured by Brookfield rotational viscometer with spindle 4 at 12 rpm in accordance with ISO 2555:2018. The solvent blend consists primarily of methyl ethyl ketone, acetone, and ethyl acetate, with a closed-cup flash point below 0 °C; the solvent evaporation profile is controlled to retain an open time of 8–15 min at 23±2 °C and 50±5 % relative humidity.
FH-II differs from unmodified polychloroprene contact cements by incorporation of an isocyanate-free polyurethane segment that raises heat-aging resistance and plasticizer migration resistance without requiring a two-component hardener. The adhesive is intended for application by air-assisted airless spray, roller coater, or notched trowel. Wet film weights of 60–120 g/m² are representative for open-cell foam substrates; dense woven fabrics with calendered backs require lower coat weights of 40–80 g/m² to avoid solvent bleed-through. Bonding is performed after solvent flash-off at 55–70 °C for 2–4 min in a forced-air tunnel, followed by nip consolidation at 0.2–0.5 MPa. Initial handling strength develops within 20–40 s after lamination, while final 180° T-peel strength stabilizes after 72 h at 23 °C according to ASTM D903-98(2017).
Batch release testing is conducted on each production lot with the following representative limits. The values are manufacturing control ranges, not customer acceptance limits; specific lot certificates of analysis may show tighter internal limits.
| Property | Method or condition | Representative limit |
|---|---|---|
| Appearance | Visual inspection | Light amber liquid |
| Solids content | ASTM D2369-20 | 38–42 wt% |
| Viscosity | ISO 2555:2018, spindle 4, 12 rpm, 25 °C | 2,500–4,500 mPa·s |
| Density | ISO 2811-1:2016, 20 °C | 0.92–0.98 g/cm³ |
| Flash point, closed cup | ISO 1523:2002 | < 0 °C |
| Open time | 23±2 °C, 50±5 % RH | 8–15 min |
| 180° T-peel strength, polyurethane foam/cotton canvas | ASTM D903-98(2017), crosshead speed 100 mm/min, after 72 h | ≥ 4.0 N/25 mm |
| Heat resistance | 500 g static load, 100 °C, 24 h | No displacement |
| VOC content | ISO 11890-2 | 600–680 g/L |
| Storage stability | Unopened drums, 5–35 °C | 12 months |
Viscosity drift during production is compensated by adding ethyl acetate in increments not exceeding 5 wt% of batch weight. In high-humidity conditions above 70 % RH, solvent evaporation is retarded and condensation on foam surfaces can produce pinholing or adhesive skip. Low-porosity polyurethane foam based on toluene diisocyanate may contain residual amine catalysts that accelerate solvent flash-off and reduce open time; such substrate lots are pretested at line speed because measured open time can fall below 6 min.
Rotational viscometry at 25 °C shows pseudoplastic behaviour with a shear-thinning index of 0.35–0.45 between 1 s⁻¹ and 100 s⁻¹. On roller coaters with closed doctor chamber, viscosity recovery after shear is rapid, reaching 80 % of low-shear viscosity within 30 s. That recovery controls foam penetration; slow recovery causes strike-through on low-density foam, while excessively fast recovery produces a surface skin and starved bond lines.
Substrate preparation is confined to surface-energy control and removal of release agents. Foam skin-side surfaces require corona discharge or flame treatment at 38–42 dyn/cm to obtain uniform wetting; cloth backings treated with fluorocarbon water repellents or silicone release agents are wiped with methyl ethyl ketone or prewashed before adhesive application. Woven fabrics with high warp tension may curl after drying; infeed roll tension below 50 N/m is maintained to limit edge lifting.
On a 1,200 mm wide roller coater with gravure roll and doctor blade, FH-II at 25 °C exhibits a wet film thickness of 80–120 µm at a line speed of 8–15 m/min and a roll gap of 0.3–0.5 mm. In production trials on polyether polyurethane foam with density 28 kg/m³ and fabric basis weight 260 g/m², delamination failure occurred at coat weights below 45 g/m² when nip pressure was lower than 0.15 MPa; above 140 g/m², solvent bleed-through produced visible staining on jacquard cloth. The production processing window was therefore maintained at 60–120 g/m². Published data for this specific configuration is limited, but observed variation in peel strength across a 300 m roll was ±12 % when gravure roll temperature increased from 22 °C to 31 °C.
For air-assisted airless spray lines, the adhesive is supplied at no more than 25 °C and sprayed through a nozzle orifice of 0.25–0.45 mm at atomizing air pressure of 0.15–0.35 MPa. Overlap between spray passes is set to 25–30 % to prevent starved edges. When the adhesive is applied at 80–100 g/m² wet and dried at 60 °C for 3 min, the residual solvent content before nip bonding is typically below 4 wt%, measured by near-infrared process analyser. If residual solvent exceeds 7 wt%, the bonded assembly may exhibit a solvent-occlusion bubble pattern and delayed peel-strength development.
Solvent retention after flash-off follows a two-stage evaporation profile. In the first stage, methyl ethyl ketone and acetone are removed within 60–90 s at 55–70 °C; in the second stage, ethyl acetate acts as a slower evaporating tail solvent, controlling the open time and final tack. Near-infrared analysis on a 1,200 mm wide line showed that residual solvent content below 3 wt% at the nip corresponds to cohesive failure, while values above 8 wt% correlate with bubble formation and reduced peel strength. The difference is critical when line speed increases from 8 m/min to 15 m/min because dwell time in a 3 m drying tunnel falls from 22.5 s to 12 s, requiring air temperature compensation of at least 10 °C to maintain the same residual solvent set point.
Open time is evaluated on the production line by finger-tack transfer. A bond is considered ready for nip consolidation when the adhesive surface drags a nitrile-gloved finger without stringing. That handling method is calibrated against a mechanical probe tack measurement at 1 N contact force and 0.5 s dwell using a texture analyser with a 25 mm cylindrical probe; acceptable lamination is observed when probe tack is between 0.6 N and 1.4 N. At values below 0.4 N, open time has been exceeded and bond failure tends to be interfacial; at values above 2.0 N, residual solvent entrapment may occur.
Compared with a representative one-part water-based acrylic laminating adhesive, FH-II exhibits shorter setting time and higher initial tack but requires explosion-proof coating and drying equipment because of the flammable solvent blend. In laboratory T-peel tests on cotton canvas to 20 kg/m³ polyurethane foam, FH-II developed 60 % of final bond strength after 1 h, whereas the acrylic dispersion developed 30 % of final bond strength under the same conditions using ASTM D903-98(2017); both values were generated from the same substrate lot and are comparative rather than specification guarantees.
Against conventional unmodified polychloroprene contact adhesives, FH-II shows a 15–20 °C higher continuous heat resistance and reduced tack transfer after 7 days at 70 °C on plasticized vinyl. However, the open time of FH-II is shorter than that of a slow-evaporating CR grade, and line speed may need to be increased by 10–20 % to prevent over-drying. The main substitution penalty is VOC management; the adhesive is outside the scope of low-VOC waterborne alternatives.
| Property | FH-II | Water-based acrylic laminating adhesive | Unmodified CR solvent adhesive |
|---|---|---|---|
| Solids content | 38–42 wt% | 48–52 wt% | 30–35 wt% |
| Viscosity at 25 °C | 2,500–4,500 mPa·s | 200–800 mPa·s | 3,000–6,000 mPa·s |
| Open time at 23±2 °C, 50±5 % RH | 8–15 min | 5–10 min | 10–20 min |
| 180° T-peel strength, PU foam/cotton canvas after 72 h | ≥ 4.0 N/25 mm | 2.0–2.8 N/25 mm | 3.0–4.0 N/25 mm |
| Heat resistance under 500 g static load | 100 °C | 70 °C | 90 °C |
| VOC content, ISO 11890-2 | 600–680 g/L | 50–120 g/L | 700–750 g/L |
| Plasticizer migration after 7 d at 70 °C | No visible migration | Slight migration | Moderate migration |
FH-II is not suitable for bonding plasticized PVC containing more than 35 phr dioctyl phthalate; plasticizer migration softens the bond and reduces 180° T-peel strength below 2.0 N/25 mm after 7 days at 50 °C. The product is incompatible with amine-catalyzed two-component polyester fabric finishes and with zinc stearate-based foam release agents; these residues interfere with interfacial wetting and lower peel strength by more than 40 % in laboratory tests. Dilution with ethanol or isopropanol above 5 wt% of total solvent may induce phase separation and viscosity spikes. Substrates with equilibrium moisture content above 12 % are dried at 45–55 °C for 20–30 min before adhesive application to avoid trapped water vapour at the bond line. The polyurethane modification is isocyanate-free; hardening occurs by solvent evaporation and physical entanglement rather than moisture cure. This avoids carbon dioxide generation from isocyanate-water reactions and permits immediate reprocessing of uncured squeeze-out. The bond remains thermoplastic and softens above 100 °C, limiting use to interior trim or seating where continuous service temperature does not exceed 90 °C.
Because FH-II contains methyl ethyl ketone and acetone, coating and drying areas must be classified as hazardous zones under Directive 1999/92/EC and fitted with intrinsically safe electrical equipment. Local exhaust ventilation is set to maintain solvent vapour concentration below 10 % of the lower explosive limit. Forced-air drying tunnel interlocks are specified to shut down heating when air flow falls below 80 % of design volume, preventing solvent accumulation. Cleaning of mixing tanks, hoses, and spray nozzles is performed with ethyl acetate or methyl ethyl ketone before the adhesive forms a tack-free surface skin; dried adhesive requires methylene chloride-based cleaners or mechanical removal. The product as supplied does not contain intentionally added phthalates or halogenated flame retardants. Heavy metal content conforms to RoHS Directive 2011/65/EU limits for lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls, and polybrominated diphenyl ethers by X-ray fluorescence screening.
On a production line laminating 6 mm polyurethane foam to 180 g/m² polyester knit for automotive seat cover inserts, FH-II was applied by air-assisted airless spray at 80–100 g/m² wet, dried at 60 °C for 3 min, and bonded with a cold press at 0.4 MPa for 15 s. Under these conditions the bond passed a 100 °C/24 h heat resistance test and showed cohesive substrate failure in T-peel tests according to ASTM D903-98(2017). Line operators monitored flash-off by finger-tack transfer; production records indicated that bond failure increased when ambient relative humidity exceeded 75 % and the drying tunnel temperature dropped below 55 °C. This observed operating envelope is a production boundary for that specific line and not a universal recommendation.
