PVC树脂的类型及其在管材、地板和薄膜中的应用

Based on the amount of plasticizer added, PVC resin is mainly divided into two categories: rigid PVC (UPVC), which contains no or only a small amount of plasticizer; and flexible PVC (SPVC), which contains enough plasticizer and has good flexibility. This core classification directly determines its downstream application forms and functional positioning to meet the usage needs of different scenarios.

Pipes are the most core and mature application field of PVC resin. With advantages such as being lightweight, resistant to acid and alkali corrosion, cost-effective, and easy to install, they are widely used in key scenarios such as building water supply and drainage, municipal pipeline networks, and agricultural irrigation. In the domestic market, PVC pipes maintain a high market share in the fields of building drainage and agricultural irrigation due to their core advantages of low cost and high corrosion resistance.

At the same time, the performance of impact-modified PVC-M pipes has been significantly improved, with impact strength increased by about 40% compared to traditional pipes. They are gradually replacing traditional cast iron pipes in municipal engineering applications, and their application scenarios are continuously expanding.

In addition to the core application field of pipes, PVC has many other applications in the field of building plastics. In the field of door and window profiles, PVC has become one of the mainstream building materials due to its excellent weather resistance, stable physical properties, and aesthetically pleasing appearance.

In the field of waterproof materials, PVC is also highly practical due to its low maintenance cost and long service life. Common rigid PVC pipes are made of UPVC resin, which contains almost no plasticizer, ensuring the hardness and pressure resistance of the pipes, making them suitable for various pressurized water supply scenarios.

PVC flooring is the fastest-growing field of downstream PVC applications in recent years. It is a new type of elastic flooring material that combines advantages such as being waterproof, moisture-proof, wear-resistant, pressure-resistant, easy to install, and available in various styles. It is widely used in residential decoration, commercial shops, offices, and public buildings.

The domestic market is growing even faster. By 2025, the market size of PVC self-adhesive flooring will exceed 12 billion yuan, with a compound annual growth rate of 18%, and PVC sheets will account for more than 65%. In terms of product segmentation, SPC stone-plastic flooring and WPC wood-plastic flooring are rapidly increasing their market penetration due to their environmental performance and realistic wood grain texture.

PVC film is also an important application of PVC resin, with demand in the packaging and construction industries continuing to grow. In the packaging field, PVC film is widely used in applications such as food packaging and pharmaceutical blister packaging due to its excellent durability, flexibility, and chemical resistance, ensuring the safety of product storage and transportation.

According to market research data, the global calendered PVC soft film market size was approximately $25.84 billion in 2025 and is expected to grow to $42.38 billion by 2034, with a compound annual growth rate of about 5.65%. In the construction field, PVC films are mainly used for waterproof membranes and building membrane structures.

In addition, cable insulation is another important application field of PVC, with cable materials accounting for about 8% of the overall PVC consumption structure, providing stable insulation protection for power transmission.

Different types of PVC products have specific requirements for the choice of raw resin. Rigid PVC products, such as pipes, door and window profiles, and rigid sheets, usually use SG-5 suspension resin with moderate polymerization to ensure product hardness and structural stability. Flexible PVC products, such as films, flooring, and cable sheaths, require the addition of sufficient plasticizers to SG-3 or SG-5 resin to adjust product flexibility and processing performance, matching the corresponding production processes and usage needs.

The domestic PVC resin industry is currently undergoing structural adjustment. On the one hand, traditional application fields such as pipes and profiles have entered a saturated market, and industry competition is focused on product quality and production cost control. Leading enterprises are gradually highlighting their advantages, and industry concentration is expected to continue to increase.

On the other hand, soft products such as films and PVC flooring, as well as various emerging segmented application scenarios, are becoming the core sources driving incremental growth in the industry. As the industry continues to advance towards greening, standardization, and recycling, the application boundaries of PVC resin will further expand, achieving value in more emerging fields.

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