PVC strip curtains made of different materials——DOTP/DOP

Introduction

PVC strip curtains are widely used in warehouses, cold storage facilities, factories, and supermarkets to provide insulation, reduce dust, and improve workplace efficiency. One of the key factors that determine the performance and longevity of PVC strip curtains is the type of plasticizer used in the material. Among the most common options are DOTP (Dioctyl Terephthalate) and DOP (Dioctyl Phthalate). Understanding their characteristics helps businesses choose the most suitable solution for their specific needs.

What is DOTP and Its Benefits?

DOTP is a high-performance, non-phthalate plasticizer that has become increasingly popular in recent years due to its safety and durability.

Key benefits of DOTP in PVC strip curtains:

• Excellent durablity: Resistant to aging, yellowing, and cracking, ensuring longer product life.
• Environmental friendliness: Classified as non-phthalate, making it a safer and more eco-friendly alternative.
• Good, low-temperature flexibility:Maintains softness and transparency even in cold environments such as cold rooms or freezers.
• Stable performance: Provides consistent flexibility and clarity without emitting strong odors.

---

What is DOP and Its Pros & Cons?

DOP is one of the most traditional and widely used plasticizers in PVC products. It has been on the market for decades and remains attractive due to its cost advantages.

Advantages of DOP:

• Lower cost:More budget-friendly compared to DOTP, which is ideal for price-sensitive projects.
• Good compatibility: Provides stable softness and flexibility for general industrial use.
• Proven application history: Used globally for many years in various PVC products.
  

Disadvantages of DOP:

Environmental concerns: Classified as a phthalate plasticizer, which may face restrictions in certain countries or industries.

Aging and yellowing: PVC curtains made with DOP tend to harden or discolor faster over time.

Less suitable for extreme environments: Performance may decline in very low temperatures compared to DOTP.

DOTP vs. DOP: A Comparative Analysis

Feature	DOTP	DOP
Durability	Long-lasting, less yellowing	Shorter life, prone to aging
Environmental Safety	Non-phthalate, safer	Phthalate-based, restricted in some regions
Low-Temperature Flexibility	Excellent for cold storage	Acceptable, but weaker in freezing conditions
Odor	Low	Higher
Cost	Higher	More affordable

How Manufacturers Help Customers Maximize Value

Choosing between DOTP and DOP should not be about declaring one “good” and the other “bad.” Instead, the right choice depends on the customer’s application environment, budget, and long-term goals.

• For cold storage or food-related industries: DOTP curtains are often recommended due to safety and low-temperature performance.

• For general factories, warehouses, or budget-sensitive projects: DOP curtains can provide good functionality at a lower cost.

• For export markets with stricter regulations: DOTP is often the safer choice to meet compliance standards.

• For short-term or temporary use: DOP can still be a cost-effective option.

By clearly explaining the pros and cons of each material, manufacturers enable customers to make informed decisions that maximize their investment and ensure the curtains perform effectively in their intended environment.

Conclusion

Both DOTP and DOP have their unique strengths and limitations in the production of PVC strip curtains. DOTP offers long-lasting, eco-friendly performance, while DOP provides an affordable solution with proven functionality. Instead of labeling one as “better,” the focus should be on identifying which material best fits the customer’s specific needs. A professional manufacturer will guide clients toward the most suitable option, helping them achieve maximum value in both cost and performance.