25cm Plastic hang Tag String Lock Garment Seal Plastic Hanging Tag Disposable Tight Tamper Plastic Seal

Plastic security seals are tamper-evident devices manufactured mainly from high-quality engineering plastics, developed to prevent counterfeiting, theft, unauthorized opening, contamination, and tampering in various application environments. They are extensively used across different industries and operational scenarios, serving an essential function in maintaining the integrity, safety, and reliability of goods during transportation, storage, handling, and end use within the supply chain. A plastic seal is a single-use self-locking device designed for one-time application; once engaged, it cannot be reopened without visible damage, ensuring clear and dependable tamper evidence.

These plastic seals are available in a wide range of colors, allowing full customization to meet branding and operational needs, including logo printing, barcode labeling, and serial number identification for tracking and control purposes. Their size specifications are flexible and can be adapted to suit various sealing requirements. In addition, plastic seals feature adjustable lengths and secure locking mechanisms, offering strong anti-counterfeiting and anti-tampering performance in different working conditions.

They are primarily used in logistics transportation, cargo security management, medical equipment sealing, and warehouse storage control. They are also widely applied in industrial packaging, as well as in specialized sealing applications for video equipment, beverage product packaging, and inspection processes. Furthermore, they function as identification and tagging solutions for bags, garments, and consumer goods packaging, improving traceability and operational efficiency.

Transportation & Logistics:
Plastic security seals are widely utilized in logistics and transportation systems to protect cargo, prevent unauthorized access, and ensure supply chain reliability. For truck and container sealing applications, high-strength plastic seals made from polypropylene materials are commonly used, providing strong tensile performance with breaking strength up to 55 lb depending on design and specifications. These seals often include numbering, laser marking, or barcode printing to support accurate tracking and traceability.

In advanced and specialized applications, plastic seals are also used in marine engineering environments. For example, submarine hatch sealing systems adopt high-performance engineering plastics such as Nylatron™ MC 907 PA6, offering excellent mechanical strength and durability. These large plastic seals are used to secure acrylic pressure spheres in manned submersibles, meeting strict marine safety standards without requiring lubrication, ensuring long-term stability and safe operation.

Plastic seals are tamper-evident sealing solutions made from engineered plastic materials, designed to secure containers, equipment, and systems against unauthorized access, contamination, leakage, and external interference. They are widely used across industries due to their durability, cost efficiency, ease of application, and strong traceability in modern security and logistics systems.

Plastic seals‌ are widely used across industries to ensure product integrity, tamper evidence, and operational safety, with key applications in food, pharmaceuticals, energy, transportation, and high-precision scientific fields. Typical applications include truck doors, trailer doors, totes, vales, airline catering carts, coin bags, inner drum bags, storage bags, and any container with a hasp or loops.Plastic seals are widely used to secure containers, tanker trucks, and courier packaging bags, preventing illegal opening or tampering with goods during transit. Their single-use design and unique numbering ensure that any manual unsealing leaves clear evidence, thereby safeguarding transportation security. In courier packages and e-commerce logistics, single-use anti-counterfeiting plastic seals (also known as security tags) are commonly adopted. Featuring unique textures or printable corporate logos, they enhance brand recognition while strengthening consumer trust. Utilities & Metering‌
In electric, water, and gas metering, ‌plastic padlock seals‌ (e.g., AC&M Type 7001) provide secure, disposable closure with visible tamper indication. These are especially useful for smart meters read remotely, where infrequent inspections require long-lasting, deterioration-resistant seals. Material Composition & Performance‌
Made from engineering-grade polymers such as:

‌Polypropylene (PP)‌: Resists moisture, chemicals, and UV exposure; widely used in outdoor and transport environments.
‌Acetal Copolymer‌: Offers high strength and low friction; used in reusable or high-cycle applications.
‌Polycarbonate‌: Provides impact resistance and clarity; suitable for inspection-friendly sealing.
‌Plastisol‌: A soft gasket-like liner used in metal caps for glass jars, forming an airtight seal during hot-filling processes. Logistics & Freight‌: Securing trailers, containers, and cargo doors to prevent theft.
‌Food & Pharmaceuticals‌: Induction seals and cap liners maintain sterility and freshness.
‌Banking & Security‌: Used on cash bags and evidence containers for chain-of-custody assurance.

1.Low cost with durable material & Single-use irreversible design

2.High-strength materials: Made of PP or engineering plastics, offering stable tensile strength

3.Factory direct sales with good price, Customizable samples available. Strict quality control.

4.With rich export experience and export qualifications, we can offer various transportation methods including sea, land and air.

5.Anti-counterfeiting and traceability: Supports laser engraving, unique serial numbering, tamper-evident markings; certain models integrate RFID technology for digital monitoring.

6.User-friendly operation: Sealing can be completed with one hand, tool-free, suitable for high-frequency operation environments.

7.Material Advantages‌
Common materials include:
‌HDPE‌: Durable, chemically resistant, and cost-effective for general-purpose sealing.
‌PP‌: Resists chemical deterioration, ideal for sensitive goods like pharmaceuticals.
‌Elastomer-blended plastics‌: Combine flexibility and recovery, bridging the gap between rigid plastics and flexible rubbers.

8.Lightweight & Easy to Install‌
Plastic seals are significantly lighter than metal alternatives, reducing overall system weight—especially beneficial in automotive and aerospace applications. Their design often allows for tool-free installation, speeding up assembly processes and lowering labor costs.

9.Tamper-Evident & Secure Tracking‌
Many plastic security seals are ‌one-time use‌ with visible locking mechanisms. Once broken, resealing without detection is nearly impossible. Features like ‌laser-printed serial numbers‌, ‌barcodes‌, ‌color coding‌, and ‌holograms‌ enable full traceability and audit compliance in logistics, elections, and pharmaceuticals.

10.Customizable & Adjustable Design‌
Pull-tight plastic seals can be adjusted to fit various container sizes, making them ideal for irregularly shaped packages or variable cargo. This adaptability enhances usability across different sectors—from securing voting machines to sealing utility boxes.

1. Q: Who are we?
A: We are based in Shandong, China, start from 2012, sell to Mid East, South Asia, Northern Europe,Africa, North America, Western Europe. There are total about 200-300 people in our office.

2. Q: How can we guarantee quality?
A: Always a pre-printing sample before mass production;
Always final Inspection before shipment;

3. Q: What can you buy from us?
A: bolt seal,cable seal,plastic seal,meter seal,metal strap seal, etc.

4. Q: Why should you buy from us not from other suppliers？
A: 12 years experiences, 300 sets of models with different style , meet your different demands with fast delivery. All our material is environmental, we won many honors from government. Our goods are popular in 300 countries.

5. Q: Do you accept custom orders?
A: Yes. We provide comprehensive OEM & ODM customization services, including:
LOGO printing and unique serial numbering
Customized sizes, colors, materials, and packaging

6.Q: What certifications do you have?
A: We maintain a complete and internationally recognized certification system, including:
ISO 9001 – Quality Management System
ISO 14001 – Environmental Management System
ISO 45001 – Occupational Health & Safety Management System
ISO 17712 – High-Security Seal Certification
Third-party test reports from SGS and other authorized institutions