| HS Code | 984672 |
| Product Name | Silver Grey PEVA Film EVA Film for Cooler Bag Lining |
| Material Composition | PEVA and EVA |
| Color | Silver Grey |
| Surface Finish | Smooth / Matte / Glossy |
| Thickness | 0.05 mm to 0.20 mm |
| Width | 1000 mm to 2000 mm |
| Roll Length | 50 m to 200 m |
| Density | 0.92 g/cm³ to 0.95 g/cm³ |
| Area Weight | 50 g/m² to 200 g/m² |
| Waterproof | Yes |
| Thermal Insulation | Yes |
| Temperature Resistance | -20°C to 70°C |
| Tensile Strength | 10 MPa to 25 MPa |
| Elongation At Break | 200% to 500% |
| Tear Strength | 20 N/mm to 60 N/mm |
| Flexibility | Flexible |
| Softness | Soft |
| Odor | Low odor |
| Application | Cooler bag lining |
| Packaging | Roll form with protective film and carton |
| Certification | RoHS, REACH, FDA (optional) |
| Eco Friendly | Yes |
| Recyclable | Yes |
As an accredited Silver Grey PEVA Film EVA Film for Cooler Bag Lining factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | |
| Shipping | |
| Storage |
For fabricated cooler bags used in daily food transport, silver grey PEVA film is positioned as the direct food-contact lining layer bonded to closed-cell polyethylene foam. The film formulation typically uses a cast monolayer with thickness 0.20–0.30 mm, an EVA copolymer containing 14–18 wt% vinyl acetate, and 3–5 wt% of a silver-grey masterbatch having 40–45% pigment concentration. Slip and antiblock additions are maintained at 800–1,200 ppm erucamide and 1,500–2,000 ppm silica to prevent blocking during wind-up. Compliance for direct food contact requires FDA 21 CFR 177.1350 and EU Regulation (EC) No 10/2011 with overall migration below 10 mg/dm². The processing line runs a 45 mm single-screw extruder with L/D 30:1 and melt temperature 185–205°C, casting onto a polished chrome chill roll held at 18–24°C to minimize haze and silver pigment plate-out. Corona discharge to 38–42 dyn/cm is mandatory before lamination because PEVA's low surface energy otherwise causes adhesive skip on the foam core. Die-cut panels are assembled with high-frequency welding at 27.12 MHz; reference weld conditions for a 0.25 mm film are plate current 0.9–1.2 A, seal pressure 0.35–0.50 MPa, and seal time 2.5–4.0 s. Corners must be radiused at 1.5–2.0 mm to reduce arc burns. Terminal product types include insulated lunch totes, picnic cooler bags, beverage sleeves, and soft-sided cooler backpacks with a PEVA inner liner thickness typically 0.20 mm for lightweight constructions.
The dominant failure mode in high-frequency welded silver grey PEVA liners for third-party meal delivery bags occurs at intersections of bottom and side seams. Corner tearing and moisture ingress are usually caused by local overheating during RF cycles, not by film composition. Production-scale experience shows that when EVA VA content rises above 16 wt%, the melt viscosity declines enough to squeeze molten polymer from the seal, producing thin edges of 0.12–0.15 mm even though nominal film thickness is 0.25 mm. Formulation for delivery bag liners should therefore remain between 12–16 wt% vinyl acetate in EVA, blended with LDPE at a ratio of 70:30 and loaded with 2–4 wt% silver-grey masterbatch. Compliance includes FDA 21 CFR 177.1350 when the liner is direct food contact; if the liner is not direct food contact, REACH Annex XVII phthalate restrictions remain applicable but the phthalate-free PEVA has no intentional phthalate addition. The converting process uses a six-sided die-cut sheet with 0.9–1.1 mm corner radius. High-frequency welding is performed at 27.12 MHz with generator output 4–6 kW, plate current 0.8–1.2 A, pressure 0.4 MPa, and seal time 2.5–3.5 s. The electrode tooling is machined from brass with a weld bead width of 2.0 mm and a controlled edge relief of 0.2 mm to avoid arcing. After welding, the assembly is cooled under pressure for 3 s to reduce weld-line shrinkage. This process yields courier box liners, delivery tote bags, pizza bag liners, and foldable insulated catering bags. Field failure data from production runs indicate that corner seal rejection rates fall below 1.2% when weld time is reduced by 0.3 s and pressure is increased to 0.45 MPa.
In temperature-controlled distribution of biopharmaceuticals, the silver grey PEVA film is overlaid onto vacuum-insulated panels and scored to form a seamless internal liner. Pharmaceutical shipper liners are manufactured with a heavier gauge of 0.30–0.45 mm and an EVA copolymer containing 18–22 wt% vinyl acetate because low-temperature flexibility at 2–8°C and during preconditioning at -20°C is required. Additive ratios are limited to 3–5 wt% silver-grey masterbatch, 0.2–0.5 phr hindered amine light stabilizer, 0.1–0.3 phr of a 1:1 blend of antioxidant 1010 and 168, and 0.1–0.2 phr silica antiblock. Compliance evidence for cold-chain shipper liners draws from ISO 11607-1:2019 for packaging system validation, ISTA 7E:2018 for thermal transit qualification, EU GDP 2013/C 343/01, and 21 CFR 177.1350 when incidental food or pharmaceutical surface contact must be defended. Downstream processing begins with pre-drying at 60°C for 2 h if ambient relative humidity exceeds 60%; moisture absorbed by EVA otherwise creates weld-line bubbles visible as frost-white specks. Sheets are sealed on a rotary impulse sealer with jaw pressure 0.45–0.60 MPa, jaw temperature 150–170°C, dwell 4–8 s, and cooling dwell 6–10 s. The sealing operation must avoid film stretching at the panel score lines; a uniaxial draw of 8–12% is permitted, but draw above 20% causes local thinning and premature opacity because silver pigment plates out under strain. Terminal product types include insulated shipper boxes for 2–8°C biopharmaceutical parcels, vaccine carrier liners, and temperature-controlled tote liners for last-mile pharmacy delivery. Published data for this specific configuration is limited with respect to long-duration contact with high-concentration alcohol disinfectants, so alcohol wipe contact should be restricted to 60–70% isopropanol and followed by drying before packing.
Delamination between the silver grey PEVA membrane and a closed-cell polyethylene foam core in reusable grocery totes is typically initiated by residual slip agents that have bloomed to the film surface. In lamination trials, corona treatment of 42–46 dyn/cm is required after the film has been stored longer than 7 days because erucamide migration reduces surface energy to below 34 dyn/cm. The formulation used for these totes contains 10–14 wt% vinyl acetate in EVA, an EVA-to-LLDPE ratio of 60:40, 3–4 wt% silver-grey masterbatch, and reduced slip at 400–600 ppm erucamide to preserve foam adhesion while still preventing reel blocking. The required compliance set includes FDA 21 CFR 177.1350 for incidental food contact, EU Regulation (EC) No 10/2011, REACH Annex XVII, and California Proposition 65 for phthalate and lead exposure; pigment dispersion certificates must document heavy metal concentrations below the supplier's published thresholds. Production lamination uses a solventless two-component polyurethane adhesive at coat weight 2–3 g/m², nip pressure 0.35–0.45 MPa, line speed 20–30 m/min, and a tunnel oven temperature of 60–70°C for 4–6 min cure. The film-to-foam peel strength measured by ASTM D1876-08 should exceed 2.0 N/15 mm before die cutting; values below 1.4 N/15 mm result in edge curl and lifting during ultrasonic seaming. Terminal product types include reusable grocery totes, frozen food tote liners, curbside pickup bag liners, and retail insulated wine tote liners. In high-humidity production rooms above 65% RH, the film must be conditioned in sealed polybag storage for at least 24 h before lamination to reduce moisture-induced adhesive bubbles.
Outdoor hydration pack and cooler bag converters evaluating PEVA as a PVC replacement must re-qualify radio-frequency tooling because PEVA's dielectric loss factor and melt viscosity are lower than those of plasticised vinyl. The outdoor liner formulation uses 9–12 wt% vinyl acetate in EVA, 2–4 wt% silver-grey masterbatch, 0.5–1.0 phr UV absorbers, and 0.2–0.4 phr hindered amine light stabilizer; this VA content provides adequate low-temperature impact resistance down to about -20°C, but PEVA film is not recommended for dry-ice applications below -40°C. Regulatory compliance for the outdoor application includes REACH Annex XVII, RoHS 2011/65/EU, CPSIA Section 101 for lead, and CPSIA Section 108 for phthalates in child-access components. Blown film extrusion is selected rather than cast film because outdoor liners prioritize puncture resistance over haze; typical parameters include a die gap of 0.8–1.2 mm, blow-up ratio 2.5–3.0, frost-line height 4–6 times die diameter, and melt temperature 190–210°C. The film is laminated to a 300D ripstop polyester shell using a two-component TPU adhesive at 3–4 g/m². Sealing uses high-frequency welding at 27.12 MHz, but because PEVA softens at lower temperature than PVC, the generator plate current must be reduced by 15–20% relative to PVC tooling to prevent burn-through. Terminal products include hydration cooler backpacks, collapsible camping ice totes, boat cooler liners, and fish kill bag liners.
| Scenario | VA content | Silver-grey masterbatch | Film thickness | Primary compliance standard |
|---|---|---|---|---|
| Insulated lunch and beverage coolers | 14–18 wt% | 3–5 wt% | 0.20–0.30 mm | FDA 21 CFR 177.1350; EU 10/2011 |
| Meal delivery and catering bags | 12–16 wt% | 2–4 wt% | 0.22–0.28 mm | FDA 21 CFR 177.1350; REACH Annex XVII |
| Pharmaceutical cold chain | 18–22 wt% | 3–5 wt% | 0.30–0.45 mm | ISO 11607-1:2019; ISTA 7E:2018 |
| Reusable grocery totes | 10–14 wt% | 3–4 wt% | 0.25–0.35 mm | FDA 21 CFR 177.1350; EU 10/2011 |
| Outdoor hydration packs | 9–12 wt% | 2–4 wt% | 0.30–0.40 mm | REACH Annex XVII; RoHS 2011/65/EU |
| Clinical specimen shippers | 18–24 wt% | 2–3 wt% | 0.25–0.35 mm | ISO 15190:2020; IATA PI 650 |
Secondary containment for diagnostic specimens shipped at ambient or refrigerated temperatures uses silver grey PEVA liner film to isolate absorbed fluids from corrugated shipper walls. The film is compounded with 18–24 wt% vinyl acetate in EVA, an EVA-to-LLDPE ratio of 70:30, and 2–3 wt% silver-grey masterbatch; the higher VA content allows the liner to conform to corner folds without cracking at 4°C. Applicable standards include ISO 15190:2020 for medical laboratory safety, IATA Packing Instruction 650 for UN 3373 Category B biological substances, and ASTM F903-18 for liquid penetration resistance of protective clothing materials when liner breach testing is required. Downstream conversion runs on a cast film line with a 50 mm extruder, L/D 32:1, chill roll 15–20°C, and corona treatment to 40–44 dyn/cm. The liner is RF welded with a twin-seam width of 6 mm and tested for leaks using ASTM D3078-02 at -30 kPa for 30 s. Terminal products include clinical trial specimen transport tote liners, laboratory sample shippers, home phlebotomy kit liners, and veterinary diagnostic mailer liners.
Competitive Silver Grey PEVA Film EVA Film for Cooler Bag Lining prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615380400285 or mail to sales2@liwei-chem.com.
We will respond to you as soon as possible.
Tel: +8615380400285
Email: sales2@liwei-chem.com
Flexible payment, competitive price, premium service - Inquire now!
Silver grey polyethylene-vinyl acetate film for cooler bag lining is supplied under model codes SG-PEVA-025, SG-PEVA-030, SG-PEVA-035 and SG-EVA-025, SG-EVA-030, SG-EVA-035. The model code identifies the polymer grade, nominal thickness in millimetres, and silver-grey finish. The film is manufactured by cast-film extrusion on a single-screw extruder with a 30:1 L/D ratio and a barrier screw, using a 1,600 mm coat-hanger die. Melt temperature at the die lip is controlled at 185–205°C for PEVA and 180–195°C for EVA. Thickness tolerance is ±5% of nominal gauge under ISO 4593:1993. The standard product range includes 0.25 mm, 0.30 mm, and 0.35 mm thickness, with 1,600 mm master rolls and slit widths from 150 mm to 1,500 mm at a tolerance of ±1.5 mm. Roll length is 250 m for 0.25 mm, 200 m for 0.30 mm, and 150 m for 0.35 mm. The core ID is 76 mm. One surface is corona-treated to 38–42 mN/m wetting tension under ISO 8296:2003; the opposite surface has an embossed matte finish with a depth of 0.08–0.12 mm. The silver-grey color is produced with a titanium dioxide and carbon black masterbatch at 1.2–1.5 wt%, providing opacity without adding chlorine-containing pigment systems.
The PEVA grade contains 10–14 wt% vinyl acetate, while the EVA grade contains 18–22 wt%. Both grades are free of added ortho-phthalate plasticizers, organotin stabilizers, and chlorinated paraffins. Melt flow rate at 190°C/2.16 kg under ISO 1133-1:2022 is typically 2–8 g/10 min for PEVA and 4–12 g/10 min for EVA. Density measured under ISO 1183-1:2019 is 0.93–0.95 g/cm³ for PEVA and 0.94–0.96 g/cm³ for EVA. By comparison, plasticized PVC of the same gauge has a density of 1.23–1.35 g/cm³; therefore, a 0.30 mm SG-PEVA lining panel measuring 500 mm × 400 mm weighs approximately 56–60 g, whereas the PVC equivalent weighs 74–81 g. The lower mass reduces high-frequency welding load and cutting-bed wear on automatic bag formers, but it also changes the feeding behavior because the film has lower stiffness than equivalent PVC.
Plasticized PVC remains the reference material in many cooler bag linings because of its rapid high-frequency welding. However, PVC has two operational boundaries. First, its plasticizer system, commonly 30–40 phr of ortho-phthalate esters, migrates to the film surface over time; surface plasticizer concentration can exceed 8 wt% after 30 days at 60°C, causing blocking, adhesive failure, and a greasy tactile finish. Second, PVC contains 45–57 wt% chlorine by elemental analysis, which complicates waste incineration and can corrode tooling if acidic off-gassing occurs during heat sealing. SG-PEVA eliminates both boundary conditions without requiring a change in outer shell textile.
The following typical values are drawn from production lot data and are not specification limits.
| Property | Test method | SG-PEVA-025 | SG-EVA-025 | Plasticized PVC 0.30 mm | LDPE 0.25 mm |
|---|---|---|---|---|---|
| Specific gravity | ISO 1183-1:2019 | 0.93–0.95 | 0.94–0.96 | 1.23–1.35 | 0.91–0.93 |
| Tensile strength, MD | ISO 527-3:2018 | 12–15 MPa | 15–18 MPa | 12–18 MPa | 20–25 MPa |
| Elongation at break, MD | ISO 527-3:2018 | 400–550% | 550–700% | 200–300% | 300–500% |
| Brittleness temperature | ISO 974:2000 | ≤ -20°C | ≤ -30°C | ≤ -5°C | ≤ -20°C |
| Water vapor transmission rate at 25°C/75% RH | ASTM E96/E96M-21 | 18–30 g/m²·24h | 15–25 g/m²·24h | 15–25 g/m²·24h | 6–10 g/m²·24h |
| Plasticizer content | GC-MS after solvent extraction | Not detected | Not detected | 30–40 phr | Not applicable |
| Chlorine content | EN 14582:2016 | <0.05 wt% | <0.05 wt% | 45–57 wt% | <0.05 wt% |
The EVA grade differs from the PEVA grade mainly in vinyl acetate content and seal initiation temperature. SG-EVA-025 begins forming a seal at 85–95°C and bonds to EVA-based hot-melt webs at 100–110°C; SG-PEVA-025 initiates at 95–105°C. The higher vinyl acetate content improves low-temperature flex-crack resistance and adhesive peel to polyethylene foam but reduces the Vicat softening point. Therefore, SG-EVA is selected for freezer-grade cooler bags and SG-PEVA is selected when the lining will be dry-wiped or exposed to frequent contact with room-temperature liquids. Both grades retain flexibility below -20°C; plasticized PVC typically embrittles below -5°C. Compared with LDPE, SG-PEVA and SG-EVA have lower tensile strength and higher water vapor transmission but significantly higher elongation at break and lower flexural modulus. LDPE remains preferable when a secondary moisture barrier is required, but its sealing initiation temperature is higher than the EVA grade. Published data for direct abrasion comparison against TPU using ASTM D4060-19 on unbacked films is limited because TPU formulations vary widely.
Roll packaging uses a 76 mm fibre core with the film wound in machine direction. Splice count is limited to one per 300 m roll; splices are flagged with paper tape. Storage is recommended at 15–30°C and 40–60% RH, away from direct UV. Under those conditions, shelf life is 24 months from production date; corona-treatment decay is the controlling variable for lamination adhesion. If the corona-treated side is stored longer than six months, the wetting tension should be rechecked. Values below 36 mN/m require in-line corona retreatment because adhesive anchorage on PEVA is otherwise insufficient. A production trial observed intermittent delamination at the film-foam interface after eight months at 35°C and 70% RH when wetting tension declined from 40 mN/m to 34 mN/m.
Density is measured by ISO 1183-1:2019 method A, and thickness by ISO 4593:1993. Tensile strength and elongation are tested on a universal testing machine with a 500 N load cell, 50 mm gauge length, and 500 mm/min crosshead speed according to ISO 527-3:2018. Tear resistance is determined by ASTM D1004-21 at 23°C. Water vapor transmission rate is measured at 25°C and 75% RH using ASTM E96/E96M-21 desiccant method. SG-PEVA-025 has a typical WVTR of 18–30 g/m²·24h. Oxygen transmission rate is above 2,000 cm³/(m²·d·bar) at 23°C and 0% RH by ASTM D3985-17, indicating that the film is a liquid barrier and cleanable surface rather than a gas barrier. Thermal stability is checked by thermogravimetric analysis at 10°C/min under nitrogen; onset of degradation is typically 300–320°C. Continuous processing above 220°C is not recommended because vinyl acetate hydrolysis can release acetic acid and cause die-lip build-up. Extrusion feedstock should be dried to below 0.05 wt% moisture using a desiccant dryer at 60–70°C for 2–4 h when ambient RH exceeds 60%; undried resin produces bubble defects and pinhole counts above 5 per 100 m² detectable at 30 kV.
Seal strength of unsupported SG-PEVA-025 measured by ASTM F88/F88M-21 with a 25 mm wide specimen and 0.4 MPa jaw pressure is typically 15–20 N/25 mm; SG-EVA-025 is typically 18–22 N/25 mm. These values are from laboratory flat-jaw seals and do not represent RF-welded foam assemblies. Surface hardness, when required, is measured by ISO 7619-1:2019. SG-PEVA-035 typically has Shore A 85–90; SG-EVA-035 is softer at Shore A 70–80. The softer EVA surface marks more readily under abrasion but resists flex-crack at -25°C. The silver-grey pigmentation provides an opacity below 5% transmittance in the 400–700 nm range measured by ASTM D1003-21, which obscures staining and provides a uniform background for print and embossed logos.
For food-contact use, the film is evaluated under EU 10/2011. Overall migration is tested in simulant A 10% ethanol, simulant B 3% acetic acid, and simulant D2 vegetable oil for 10 days at 40°C. For cold-chain contact at 0–10°C with short times, typical overall migration is below 2 mg/dm², but the final laminate must be tested because the adhesive layer contributes to total migration. The base polymers fall within FDA 21 CFR 177.1350 for ethylene-vinyl acetate copolymers; end-use compliance is conditioned on the lamination adhesive and outer shell.
| Regulation/Standard | Relevant test or restriction | SG-PEVA/EVA status |
|---|---|---|
| REACH Annex XVII Entry 51/52 | Phthalates DEHP, DBP, BBP, DIBP <0.1 wt% | Not intentionally added; below detection limit by GC-MS |
| EU 10/2011 | Overall migration <10 mg/dm² | Typical <2 mg/dm² in film-only simulant tests |
| FDA 21 CFR 177.1350 | Olefin polymers food contact | Compliant as supplied; final laminate subject to end-use testing |
| RoHS 2011/65/EU | Pb <1000 mg/kg, Cd <100 mg/kg, Hg <1000 mg/kg, Cr(VI) <1000 mg/kg, PBB/PBDE <1000 mg/kg | Below limits by IEC 62321 series screening and confirmatory digestion |
| EN 71-3:2019+A1:2021 | Migration of elements in toys | Relevant for soft cooler bags marketed to children; film alone meets Class III limits; final article depends on assembly |
Chemical resistance limits: PEVA and EVA are not suitable for continuous contact with aromatic solvents, ketones, or chlorinated solvents. Exposure to methylene chloride, toluene, or methyl ethyl ketone above 25°C causes swelling and loss of mechanical integrity. Dilute alcohol and dilute acetic acid contact is acceptable for cleaning, but strong oxidizing sanitizers such as sodium hypochlorite above 1,000 mg/L available chlorine can accelerate surface oxidation after repeated cycles. Contact with amine-based antistatic masterbatches is not recommended because free amines catalyze vinyl acetate hydrolysis at melt processing temperatures.
Direct substitution of PVC by SG-PEVA on high-frequency welding lines requires three process adjustments. First, the dielectric loss factor of PEVA is lower than that of plasticized PVC; RF generators rated at 5 kW for 0.30 mm PVC may require 0.4–0.8 s longer seal dwell or 5–10% higher output voltage to reach equivalent tear seal strength. Second, the hot-tack plateau is narrower for PEVA; heat-seal jaw temperature should be maintained at 100–115°C rather than the 120–140°C often used for PVC. Third, die-cutting and knife-cutting temperatures should be kept below 50°C because warm PEVA stretches at the cut edge and increases fibre pull-out from the foam backing.
Adhesive systems based on PVC solvent welding with tetrahydrofuran or methyl ethyl ketone do not bond PEVA; they must be replaced with polyurethane reactive adhesives or polyolefin hot-melt webs. Lamination to polyethylene foam is performed with a two-component solventless polyurethane adhesive or an EVA-based hot-melt web. The recommended nip temperature is 95–110°C, nip pressure 0.2–0.4 MPa, and line speed 8–15 m/min. When 3 mm PE foam is bonded with 15 g/m² EVA web, 180° peel strength based on ISO 11339:2022 is typically 2.5–4.0 N/15 mm for SG-EVA-025 and 1.8–2.8 N/15 mm for SG-PEVA-025. With solventless polyurethane adhesive, the difference narrows and failure is usually cohesive within the foam rather than adhesive at the interface.
In sewing operations, PEVA has lower tear propagation resistance than PVC. A ball-point needle is recommended at 8–10 stitches per inch, and stitch holes through the film should be located in the seam allowance rather than in the liquid-exposed panel. Published data for this specific configuration is limited for long-term stitch-hole fatigue in PEVA; qualification coupons should be tested by ASTM D1004-21 after 1,000 flex cycles at -10°C.
In cooler bag lining, the SG-PEVA or SG-EVA film is positioned as the liquid-contact layer over a closed-cell polyethylene foam insulation core. The film is not the primary thermal insulator; its function is to prevent condensation, ice-melt water, and food residue from wetting the foam core and to provide a cleanable interior surface. Typical cut panels are heat-sealed to the outer shell using RF welding or thermal impulse sealing. Package-level testing should follow ASTM F1140-22 for burst strength and ISTA 7E for thermal performance in the complete insulated assembly, not the film alone. The film is supplied as sheet stock or slit-to-width rolls for automatic bag formers.
