Traditional PVC Film: Advantages and Disadvantages

Traditional PVC Film: Advantages and Disadvantages

Advantage:

Low cost and mature mass production

PVC resin and plasticizer raw materials are inexpensive. The industrialization of casting and extrusion film-forming processes has spanned several decades, enabling the rapid production of large-sized films with extremely low processing difficulty.

Good flexibility and self-supporting properties

Soft and foldable at room temperature, it requires no porous substrate support, making it suitable for simple experiments, household tablecloths, and lightweight filtration components.

Stable at room temperature in a weak environment

It shows no obvious corrosion when used short-term in air, ambient temperature fresh water, and weakly acidic or alkaline environments, making it suitable for low-load ambient temperature systems.

erational threshold

Laboratories can quickly Self-made thin films for mechanism demonstrations without the need for harsh preparation conditions such as high temperature, water, or an oxygen-free environment.

Self-made:

There is a natural upper limit to separation performance

Flux and selectivity cannot be improved simultaneously; small molecules with similar kinetic diameters (such as CO₂/N₂ and ethanol/water) have poor separation capability, making high-precision separation unachievable.

extremely poor solvent resistance, heat resistance, and moisture resistance.

Exposure to organic solvents such as alcohols, ketones, and esters causes severe swelling; at temperatures>60°C, the plasticizer volatilizes and is lost, resulting in film hardening, brittleness, and irreversible decline in flux rate; high-humidity environments accelerate aging.

ification precision is low, and there is no precise control capability.

Permeability can only be roughly adjusted by changing the plasticizer content, specific adsorption sites cannot be constructed at designated locations, and molecular-level customization cannot be achieved.

vere long-term performance degradation

Plasticizers continuously migrate and leach out, causing persistent alterations to the membrane's microstructure; consequently, components require frequent replacement, resulting in high operational and maintenance costs.