Transparent light film
It has a smooth surface, high transparency and gloss, and is used to improve the saturation, brightness and surface protection of printed matter.
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Based on the colorless transparent film, it is divided into light film, matte film, super transparent film and transparent base film according to the surface effect; and then through corona, primer, glue coating, extrusion compounding and other processes to form ready-coated, pre-coated, self-adhesive and primer-free products.
According to the requirements of transparency, gloss performance and subsequent processing, we provide light film, matte film, super-transparent film and transparent base film. Different materials and adhesive layer structures can meet the needs of printing, lamination, lamination, labeling and advertising protection.
It has a smooth surface, high transparency and gloss, and is used to improve the saturation, brightness and surface protection of printed matter.
The surface is diffusely reflective, low-gloss, and visually soft, reducing reflection and providing a delicate paper or silky appearance.
It enhances the "film-free feel" through low haze, high light transmittance and high flatness, making it suitable for high-end printing, display and transparent protection.
It is used for printing, coating, lamination, tape, label and pre-coating processing, and is the basis for subsequent functionalization and adhesive layer processing.
Confirming the product from four aspects: surface effect, material, processing structure and end use can match the appropriate specifications more quickly.
Light film, matte film, super transparent film or ordinary transparent base film.
BOPP, BOPET, CPP, PVC is optional for advertising cold mounting.
Base film, ready-to-coat, pre-coated, self-adhesive or primerless pre-coated base film.
Paper, digital printing, flexible packaging, labels, tapes, advertising protection, etc.
Different applications have different requirements for surface treatment, adhesive layer type, compounding method and equipment used, which can be customized according to the actual process.
Single-sided or double-sided corona can be directly printed, coated, laminated or used as a base material for tapes and labels.
The film itself does not have a permanent adhesive layer. When laminating, a water-based or solvent-based adhesive is applied online and then combined with the paper.
Pre-compound EVA or low-temperature adhesive layer on the surface of BOPP or BOPET, and then bond it to the paper after heating and pressure.
The back of the film is coated with pressure-sensitive adhesive and equipped with release material, which can be used for surface polishing and protection without heating.
Through special surface design, EVA can be directly coated without traditional primer. It is mainly used by pre-coating film processing plants.
Final specifications need to be confirmed based on material, thickness, treatment surface, friction coefficient, thermal performance and composite process.
| material | Main features | Common thickness reference | Suitable for processing | Main applications | Selection reminder |
|---|---|---|---|---|---|
| BOPP Biaxially oriented polypropylene |
It is light, transparent, has good gloss, has high cost and area efficiency, and has wide adaptability to printing and coating. | 10–75 μm | Base film/ready-coated/pre-coated/self-adhesive | Paper lamination, flexible packaging, labels, tapes, bag making and general surface protection. | Temperature resistance and dimensional stability are lower than BOPET; corona retention and heat shrinkage need to be confirmed. |
| BOPET biaxially stretched polyester |
High rigidity, dimensional stability, better temperature resistance and mechanical strength, and stable transparency. | 12–125 μm | Base film/ready-coated/pre-coated/self-adhesive | High-end print lamination, digital printing, labels, temperature-resistant coating and industrial lamination. | The density is higher than BOPP, and the weight per unit area is higher for the same thickness. |
| CPP Cast polypropylene |
It is soft, has good heat-sealing properties and is puncture-resistant. It is suitable as the inner layer of flexible packaging or single-layer bag making film. | 20–100 μm | Base film / printing / lamination / heat sealing | Food bags, inner layers of composite bags, clothing bags, flowers and daily necessities packaging. | It is not the mainstream substrate for paper pre-coated films, and the focus is on heat sealing temperature and friction coefficient. |
| PVC Soft polyvinyl chloride |
It is soft and has good adhesion, suitable for pressure-sensitive adhesive cold lamination and advertising surface protection. | 40–200 μm | Self-adhesive/cold mounted/calendered | Advertising inkjet printing, photos, display screens, short-term indoor and outdoor protection. | Usually used as an advertising coating route alone and not mixed with food packaging base film. |
The same basic membrane can serve multiple markets. What really determines applicability is the combination of material, surface treatment and adhesive layer structure.
Covers, albums, menus, posters, instruction manuals and publications are coated on the surface to improve wear resistance, stain resistance and display effect.
Cosmetic boxes, wine boxes, electronic product boxes, food cartons and handbags, taking into account both visual effects and surface protection.
Pre-coated or self-adhesive structures are suitable for short runs, personalized printing, and quick lamination after inkjet and toner printing.
PVC or PET self-adhesive glossy and matte films are used for inkjet printing, photos, exhibition boards and advertising screens to provide cold mounting protection.
BOPP, BOPET or CPP can be used for print lamination, single layer bag making, transparent windows and general packaging structures.
The clear base film can be further used for wraparound labels, sealing tapes, electronic tapes, coatings and release processing.
The following is typical reference data. Formal orders are subject to specific model TDS, confirmed samples, technical agreement and batch COA.
| project | Typical reference | meaning | Common detection methods |
|---|---|---|---|
| thickness | 10–50 μm | Affects stiffness, weight per unit area, processing speed and cost | GB/T 6672 |
| density | Approximately 0.91 g/cm³ | Used for area, weight and roll diameter estimation | By product standard or contract method |
| haze | About 1.1%–2.0% | The lower the value, the clearer it is, suitable for highly transparent display | GB/T 2410 |
| 45°gloss | About 89%–95% | Reflect highlights and print enhancement effects | GB/T 8807 |
| wetting tension | Approximately 39–42 mN/m | Affects the adhesion of inks, coatings, and adhesives | GB/T 14216 |
| tensile strength | MD 133–150 MPa;TD 268–313 MPa | Reflects machine, processing and composite tolerance capabilities | GB/T 1040.3 |
| thermal shrinkage | MD 2.0%–4.0%;TD 0%–2.5% | Affects dimensional stability after high temperature processing | GB/T 10003 or agreed method |
| project | Typical reference | meaning | Common detection methods |
|---|---|---|---|
| thickness | 10–75 μm | Thin version suitable for printing lamination, thick version suitable for protection, labeling or die cutting | GB/T 6672 |
| density | About 0.86 g/cm³ | The matting layer structure makes its unit volume mass lower than ordinary BOPP light film | By product standard or contract method |
| haze | About 78%–82% | Creates soft, low-reflective matte vision | GB/T 2410 |
| 45°gloss | About 5%–10% | The lower the value, the more obvious the matting effect is. | GB/T 8807 |
| wetting tension | Approximately 38–44 mN/m | Different processing surfaces can correspond to printing, coating or adhesive layer lamination. | GB/T 14216 |
| tensile strength | MD 110–135 MPa;TD 200–245 MPa | Used to confirm high-speed printing and lamination stability | GB/T 1040.3 |
| thermal shrinkage | MD 3.0%–4.8%;TD 0.5%–2.0% | Thick films or special applications require attention to thermal deformation | GB/T 32021 or agreed method |
| project | Typical reference | meaning | Common detection methods |
|---|---|---|---|
| thickness | Commonly used 12–95 μm, expandable and customizable | Covering packaging, lamination, labelling, coating and industrial applications | GB/T 6672 |
| density | About 1.39 g/cm³ | The weight per unit area is significantly higher than that of BOPP at the same thickness. | By product standard or contract method |
| transmittance | About 89.2%–89.5% | Affects transparent display and print pattern clarity | GB/T 2410 |
| haze | About 3.2%–4.7% | The haze will change depending on the thickness and surface condition. | GB/T 2410 |
| gloss | Approximately 132–135 GU | Used to evaluate the performance of high-gloss surfaces | GB/T 8807 or contract method |
| Corona intensity | Corporate Profile Example Approximately 58 dyn | Suitable for subsequent printing, coating, gluing and lamination | GB/T 14216 |
| Main advantages | High strength, temperature resistance, dimensional stability | Ideal for digital printing, high temperature coating and industrial processing | GB/T 16958 |
| project | Typical reference | meaning | Common detection methods |
|---|---|---|---|
| thickness | 20–100 μm | Covering bag making, composite inner layer and general packaging | GB/T 6672 |
| density | Approximately 0.90–0.91 g/cm³ | Facilitates roll weight, area and packaging cost estimation | By product standard or contract method |
| Transparency | Customized according to normal and high transparency levels | Affects the composite effect of packaging display and printing | GB/T 2410 |
| COF | Customized by high slip, normal or anti-slip grade | Affects bag making machines and automatic packaging machines | GB/T 10006-2021 |
| Heat sealing performance | Customized according to sealing temperature and heat sealing strength | Determine packaging sealing speed and strength | GB/T 27740 or contract method |
| processing surface | Single or double sided corona | Corresponds to printing, laminating and coating positions | GB/T 14216 |
| Main advantages | Soft, heat-sealed, puncture-resistant | More suitable as the inner layer of flexible packaging rather than the main material for paper coating | GB/T 27740 |
Standard status verification date: 2026-07-12. The standard may be in the process of revision or replacement, and the latest status should be confirmed again before signing a technical agreement.
Product standards, testing methods and end-use compliance are three levels. When used in food contact, pharmaceutical packaging, electronics, electrical, outdoor advertising or children's products, corresponding regulations, migration, hygiene, weather resistance, flame retardant or environmental testing must be added based on the final structure and usage scenarios. The listed standards do not constitute a uniform compliance commitment for all applications.
First confirm the appearance and usage, and then determine the material, processing structure and key parameters to avoid errors caused by just asking for "glossy film/matte film".
Choose the surface effect from light film, matte film, super-transparent film and transparent base film, and then determine the final specifications based on the material, adhesive layer, processing technology and use.