Detailed Explanation Guide for Special Numerals for Co extruded Film (Issue 3: Process and Application)

1、 Core Process Terminology
Solvent free co extrusion technology
Definition: Directly co extrude adhesive with resin without the need for solvent assisted interlayer bonding.
Environmental Upgrade
VOCs emissions
Approaching zero, passing UL ECOLOGO certification and EU 2025/351 new regulations.
Recycled plastic compliance
Comply with the EU's requirements for the quality assurance system of recyclers, ensuring the proportion of recycled materials (such as KE-3000 adhesive compatible with 30% recycled PE).
Efficiency improvement
Eliminating the solvent drying process, shortening the production cycle by 20%, reducing overall costs by 15% -20%, and adapting to the latest revised five layer co extrusion blown film unit standard in Guangdong Province (screw length to diameter ratio of 32:1, die diameter of 550mm).
Bidirectional stretching process
Definition: By longitudinally (MD) and transversely (TD) stretching, molecular chains are oriented and arranged to enhance film performance.
Technical value:
strengthening
After stretching, the tensile strength of the PA layer is increased to 120MPa (only 80MPa without stretching), suitable for heavy-duty container bags (ton bags).
Barrier optimization
After biaxial stretching, the OTR of EVOH layer decreased by 50%, meeting the strict requirement of ≤ 0.1cc/(m ² · 24h · atm) for pharmaceutical blister packaging.
Equipment adaptation
Compatible with Mitsubishi Heavy Industries high-precision stretching machine in Japan, with thickness deviation controlled within ± 3%, and compatible with the latest national standard "General Rules for the Quality of Multi layer Co extruded Film and Bag for Food Packaging", which requires a light transmittance of ≥ 85%.
2、 Application field terminology
sterile packaging
standard
Through FDA verification of gamma ray sterilization (25kGy dose), the microbial residue is ≤ 1CFU/100cm ², and the migration amount complies with the new regulation of total migration amount ≤ 10mg/dm ² in EU Regulation 2025/351.
Material combination: PA/EVOH/PE seven layer co extruded film, OTR ≤ 0.08cc/(m ² · 24h · atm), used for packaging penicillin bottles for injections, reducing costs by 18% compared to traditional aluminum-plastic composite packaging and being recyclable.
Technological breakthrough: KE-3000 adhesive has been optimized at the molecular level interface, and its peel strength has decreased by less than 5% after 180 days of steaming at 135 ℃, which is suitable for the high-temperature sterilization needs of pre packaged vegetables.
Electronic component packaging
Antistatic performance
standard
The surface resistance is ≤ 10 ⁶ Ω (test standard ASTM D257), and KE-3000 reduces the surface resistance of aluminum-plastic film to 10 ⁵ Ω by adding carbon nanotubes, meeting the production standards of dust-free workshops.
Cleanliness requirements: Produced in a Class 100 dust-free workshop, with particle pollutants (>0.5 μ m) ≤ 1/ft ³, and compatible with the moisture-proof requirements of chip packaging (WVTR ≤ 0.5g/(m ² · 24h)).
New application cases
A company in Wucheng, Shandong Province uses a five layer co extrusion blown film process to produce high viscosity grass film (tensile strength>80MPa), which is exported to the UK for outdoor grass bundling, with a shelf life extended to 18 months.
3、 Regulatory and Certification Terminology
FDA certification
test project
Migration volume testing
The total migration amount is ≤ 10mg/dm ², and heavy metals (lead ≤ 1mg/kg, cadmium ≤ 0.02mg/kg) meet the requirements of 21 CFR 177.1520 for olefin plastics.
Toxicological assessment
Through acute oral toxicity testing (LD50>5000mg/kg), KE-3000 adhesive has passed FDA certification and is suitable for highly sensitive fields such as dairy products and pharmaceuticals.
Technical response
Adopting a solvent-free formula to avoid FDA restrictions on aromatic primary amines and ensure safety in contact with food.
REACH regulation
Restricted substances
SVHC List
Phthalates (DEHP ≤ 0.1%) and polycyclic aromatic hydrocarbons (PAHs ≤ 10mg/kg) need to be detected, and CF420 achieves zero detection through solvent-free process.
Registration Requirements
Chemical substances with an annual output greater than 1 ton must complete REACH registration
Environmental advantages
The bio based content is 45% (castor oil raw material), reducing the carbon footprint by 30% compared to traditional products, which is in line with the EU's "Packaging and Packaging Waste Regulations" target of bio based packaging accounting for ≥ 30% by 2030.