Explore our industrial grade shrink, sealing, and barrier packaging solutions engineered for global compliance and high-performance automated systems.
An in-depth analysis of Cast Polypropylene (CPP) structure, thermal dynamics, and barrier efficiency for high-speed conversion.
Modern CPP double-sided heat seal films are engineered via advanced 3-layer or 5-layer cast extrusion processes. By combining specialized PP random copolymers in outer skin layers and high-crystallinity PP homopolymer in the core, manufacturers balance low heat seal initiation temperature (SIT) with superior structural stiffness and optical clarity.
Featuring active sealing layers on both the corona-treated and non-treated surfaces, our CPP film accommodates high-speed packaging operations on Horizontal Form-Fill-Seal (HFFS) and Vertical Form-Fill-Seal (VFFS) equipment, offering reliable hermetic seals even under variable pressure and temperature cycles.
Carefully balanced migrations of slip and anti-block additives assure a low and stable Coefficient of Friction (COF range: 0.20 to 0.30). This optimization prevents structural blocking during warehousing and allows smooth transit across metal guides on high-volume downstream packaging machinery.
The molecular composition of double-sided heat sealable cast polypropylene film determines its functional durability. In a standard A-B-C or A-B-A 3-layer structure:
Technical Insight: Lowering the Heat Seal Initiation Temperature (SIT) directly reduces energy consumption in automated thermal bars, translating to localized utility savings and reduced thermal degradation of heat-sensitive contents like chocolates or pharmaceutical elements.
Over two decades of excellence in material optimization, resource integration, and precision quality control.
Zhongshan Tianchen New Materials Co., Ltd. – Your One-Stop Packaging Material Procurement Platform.
Zhongshan Tianchen New Materials Co., Ltd. is a one-stop packaging material procurement platform established on the basis of more than 20 years of experience in the film packaging industry to act as a comprehensive one-stop packaging material procurement platform. Established on the foundation of extensive industry experience, Tianchen is driven by a commitment to resource integration and addressing customer needs, ensuring that it offers the finest solutions for diverse packaging requirements.
Industrial packaging experience driving global standard solutions.
Modern inline inspection systems verifying thickness and seal integrity.
At Tianchen, We have a professional production, research and development and sales teams, so quality control is taken very seriously. The modern quality control system implemented within the company ensures that all products meet the customer’s standards. This commitment to quality, combined with large-scale production capabilities, has garnered significant favor and trust from customers. The company's experienced professionals continuously work to innovate and improve product offerings, ensuring that they always deliver the best to their clients.
In a competitive marketplace, Zhongshan Tianchen New Materials Co., Ltd. stands out as a reliable partner for all your packaging material needs. As a one-stop packaging material procurement platform, Tianchen combines decades of industry expertise with a passion for quality and customer satisfaction. Whether you need eco-friendly heat shrink films or durable labeling solutions, Tianchen is here to provide the best in the industry.
Leveraging geographical, infrastructural, and scale efficiencies to deliver high-quality, cost-effective packaging materials.
China's packaging material manufacturing industry has transitioned from high-volume production to precision-engineered polymer processing. Factories based in South China's industrial zones (such as Zhongshan, Guangdong) operate at the epicenter of raw material supply, high-speed logistics, and technical talent pools. This regional synergy provides global buyers with structural cost advantages, minimal lead times, and reliable technical adaptability.
We source primary polypropylene resins directly from leading global petrochemical enterprises (such as Sinopec and ExxonMobil). This direct-to-factory integration ensures that chemical additives, molecular weight distributions, and polymer densities remain strictly uniform across multiple production runs, eliminating the quality variance typical of intermediate brokers.
Our production facilities utilize modern multi-layer cast co-extrusion lines equipped with automatic thickness profiling systems. These inline sensor modules calculate thickness deviations down to ±1%, ensuring that high-speed packaging machinery functions smoothly without tension fluctuations or web breaks.
Standardized parameters across our core cast polypropylene product ranges. Custom gauges and roll slitting services are available upon request.
| Property / Metric | Typical Value / Range | Test Standard | Industrial Significance |
|---|---|---|---|
| Thickness | 15, 20, 25, 30, 40, 50, 60 Micron (μm) | ASTM D374 | Customizable for lightweight wraps to heavy bags |
| Heat Seal Strength | ≥ 3.0 N / 15mm (at 120°C, 0.3MPa, 1s) | ASTM F88 | Ensures robust, leak-proof bottom and side seams |
| Coefficient of Friction (COF) | Dynamic: 0.20 - 0.30 (Film to Film) | ASTM D1894 | Enables high-speed sliding over metal formers |
| Haze | ≤ 2.5% | ASTM D1003 | High transparency for optimal product visibility |
| Gloss (45°) | ≥ 85% | ASTM D2457 | Reflective, premium appearance for retail display |
| Tensile Strength (MD/TD) | MD: ≥ 40 MPa / TD: ≥ 30 MPa | ASTM D882 | Resists structural tearing during filling and transport |
| Surface Tension (Corona Treated Side) | ≥ 38 Dyne/cm | ASTM D2578 | Ensures strong bonding of laminates and print inks |
| Seal Initiation Temp (SIT) | 105°C - 115°C | Tianchen Internal Standard | Low temperature threshold for high-speed lines |
Ensuring cross-border compliance with FDA, European Commission, and REACH directives for sensitive food and pharmaceutical packaging.
For international procurement departments, ensuring that polymer films do not leach chemical compounds into food or medical contents is critical. Our CPP Double-Sided Heat Seal Film complies with the following standards:
Due to its high optical clarity, puncture resistance, and stable coefficient of friction, double-sided sealable cast polypropylene film is used across several processing applications:
The excellent water vapor barrier performance prevents moisture loss in baked goods and regulates hydration, extending bread shelf-life while preserving outer crust crispness.
Commonly laminated to BOPET, BOPP, or BOPA to serve as the inner sealant layer. This combination is ideal for stand-up pouches used to pack snack foods, pet treats, and dry ingredients.
Double-sided sealability allows flat web materials to form protective barriers around syringes, surgical trays, and medical supplies, surviving ETO sterilization without seal degradation.
Strategic shift towards circular economy models, material downgauging, and high-performance polyolefin structures.
The global packaging sector is moving rapidly toward sustainable design. Historically, complex multi-material films (e.g., PET laminated to PE) presented recycling challenges because separating the polymer layers is economically unviable. Modern regulations encourage mono-material packaging structures to support circular waste treatment systems.
CPP double-sided heat seal films provide a viable solution for mono-material designs. By laminating a biaxially oriented polypropylene (BOPP) outer layer with a cast polypropylene (CPP) inner sealant layer, converters create All-PP (Polypropylene) structures. These mono-material bags can be processed in standard PP recycling streams, eliminating chemical separation steps and aligning with global ESG targets.
Through raw material refinement and cast cooling optimization, we produce thinner films that retain high mechanical strength. Replacing a standard 30-micron film with a high-tensile 25-micron CPP film reduces total plastic consumption by 16.6% per pack. This reduction lowers packaging weights, shipping costs, and carbon footprints across the supply chain.
Get answers to common technical, logistics, and quality questions regarding CPP Double-Sided Heat Seal Film.
Select from our heavy-duty wrapping, industrial shrink bags, and custom printed surface protection materials.
Tianchen Materials
