Application of CHNSpec TH-110 Haze Meter in the Research of Organic Montmorillonite Modified PVB Films

In fields such as automotive safety glass and photovoltaic encapsulation, Polyvinyl Butyral (PVB) films are widely used due to their good light transmittance, bonding properties, and mechanical performance. To further enhance the strength, insulation, and UV shielding capabilities of the films, a university materials team adopted organic montmorillonite to modify PVB. They prepared PVB/organic montmorillonite composite transparent films through in-situ polymerization and used the CHNSpec TH-110 haze meter to complete critical optical performance testing, providing stable and reliable data support for material formula optimization and performance verification.

I. Research Background and Testing Requirements

Under higher safety standards and complex usage environments, traditional PVB films have room for improvement in mechanical and insulation properties. Nano-montmorillonite can improve the comprehensive performance of polymers at low addition levels, but inorganic fillers are prone to agglomeration, which affects the light transmittance and haze of the film, thereby influencing the visual clarity and user experience of laminated glass.

The research team needed to conduct systematic testing on PVB composite films with different modifiers and addition ratios, focusing on:

• Whether the visible light transmittance meets the relevant specification requirements for laminated glass.
• The variation patterns of haze to judge the dispersion uniformity of fillers.
• Differences in the impact of different organically modified montmorillonites on optical parameters.
• Fast, stable, and repeatable detection of batch samples.

II. Application of TH-110 Haze Meter in the Experiment

1. Instrument Selection and Adaptability

The research selected the CHNSpec TH-110 haze meter to carry out haze and transmittance testing. The instrument is compatible with multiple standards such as ASTM D1003, ISO 13468, and GB/T 2410, and can simultaneously output measurement results under dual standards, adapting to the data specification requirements for university scientific research and achievement publication.

2. Core Testing Solution

• Samples: Pure PVB film, PVB/montmorillonite composite film, composite films with montmorillonite modified by different surfactants.
• Measurement Parameters: Haze, Transmittance.
• Measurement Method: Open measurement area, adapted for flexible film and sheet samples; utilizing dual measurement apertures of 21mm and 7mm to meet the multi-point testing needs of specimens of different sizes.
• Operational Process: Place the sample directly after calibration, quickly complete multi-point measurements and take the average value; the data is stable with good repeatability.

3. Key Testing Results and Scientific Research Value

The haze of pure PVB film is at a relatively low level, with a uniform internal structure, less light scattering, and stable transmittance performance.

After adding montmorillonite/organic montmorillonite, the haze of the film shows an upward trend as the filler content increases, but the haze increase is controllable at low addition levels.

The dispersion of organically modified montmorillonite is improved, making the film surface smoother. The haze fluctuation is smaller than that of the unmodified system, confirming that the modification process can enhance the dispersion uniformity of fillers in the PVB matrix.

The visible light transmittance of the composite film remains at a high level, meeting the optical index requirements for laminated glass applications, while also possessing a certain degree of UV shielding capability.

The TH-110 haze meter, with its 0.01% haze resolution and stable repeatability, helped the team clearly distinguish optical differences between different formulas and contents, providing an objective basis for determining the optimal addition ratio and ensuring that the material maintains qualified transparency and low haze levels while improving mechanical and insulation properties.

III. Summary of Application Value

• Standard Compliance: Supports multiple national and international standards; the detection results can be directly used for academic research and data presentation in papers.
• Efficient and Stable: No preheating required, fast data output; adapted for batch sample testing in university laboratories, reducing human operational errors.
• Scenario Adaptability: Dual apertures and an open platform make it convenient to place flexible film samples with flexible measurement.
• Reliable Data: High resolution and good repeatability can accurately reflect the filler dispersion state and the internal uniformity of the film, supporting material structure-performance correlation analysis.

This application shows that the CHNSpec TH-110 haze meter can stably serve the R&D and performance characterization of high-molecular transparent films, providing continuous and reliable optical detection support for formula iteration, process optimization, and performance verification of functional film materials such as PVB-based composite membranes.