Pure PVC Resin Suspension Grade K-65

Product Overview

• Product Name: PVC Resin Suspension Grade K-65
• Chemical Name: Polyvinyl chloride (PVC)
• Molecular Formula: (C₂H₃Cl)n
• CAS Number: 9002-86-2
• Form: White powder or granules
• K-Value: 65 (indicates medium-high molecular weight)

2. Technical Properties

• Molecular Weight: Medium-high, typically correlating to the K-value of 65.
• Appearance: White powder or granular form.
• Density: 1.35–1.45 g/cm³
• Bulk Density: 0.55–0.65 g/cm³ (varies by supplier)
• Particle Size: Typically between 100–200 microns, depending on manufacturer specifications.
• Viscosity: Medium to high viscosity during processing.
• Glass Transition Temperature (Tg): Approximately 80°C to 85°C.
• Thermal Degradation Temperature: 190°C to 210°C.
• Moisture Content: Typically ≤ 0.2% (important to ensure proper processing and quality of end products).

3. Production Process

Suspension Polymerization is the most common method used for producing PVC Resin K-65. The process involves polymerizing vinyl chloride monomer (VCM) in a water-based suspension with a suspending agent.

• Polymerization: The reaction occurs under heat and pressure in the presence of a free-radical initiator.
• Resulting Resin Characteristics: The resin produced by suspension polymerization tends to have a granular texture, with relatively low gel content, resulting in uniformity in processing and higher purity compared to other grades.

4. Applications

PVC Resin K-65 is widely used in various industrial and consumer applications, including:

a) Pipes and Fittings

• Applications: Used in the production of rigid PVC pipes, fittings, and profiles.
• Properties: Provides the right balance of stiffness, durability, and impact resistance. Used for plumbing, electrical conduits, and drainage systems.

b) Flooring

• Applications: Used in PVC flooring, including vinyl tiles and sheet vinyl.
• Properties: Provides flexibility and durability, making it suitable for commercial, industrial, and residential flooring.

c) Films and Sheets

• Applications: Used in the production of PVC films, sheets, and clings (e.g., food packaging films, cling wraps).
• Properties: The K-65 grade provides an ideal balance of mechanical strength and ease of processing for clear and flexible film applications.

d) Electrical Insulation

• Applications: Used for insulation of electrical cables and wires.
• Properties: The medium-high K-value offers good insulation properties and resistance to heat and chemicals.

e) Rigid Profiles

• Applications: Used in window profiles, doors, and siding applications.
• Properties: Rigid PVC profiles manufactured from K-65 resin are durable, weather-resistant, and ideal for long-term outdoor exposure.

f) Footwear

• Applications: Used in the production of PVC footwear, such as slippers and sandals.
• Properties: Offers flexibility, durability, and comfort for footwear applications.

g) Medical Equipment

• Applications: Used in the production of medical products like blood bags, medical tubing, and containers.
• Properties: The resin is used because of its excellent chemical resistance and durability.

5. Advantages of PVC Resin K-65

• Good Processability: The medium molecular weight of K-65 resin makes it easy to process and mold into a variety of products using common processing methods like extrusion and injection molding.
• High Mechanical Strength: Offers a good balance between stiffness and impact resistance, which is ideal for rigid products like pipes and profiles.
• Clarity: Suitable for products that require transparency, such as certain packaging materials or medical components.
• Versatility: Suitable for a wide range of applications, from pipes to flooring to medical products, due to its balance of flexibility and strength.
• Durability: Resistant to aging, weathering, and various chemicals, ensuring long-term use in harsh environments.

6. Safety and Handling

Storage Conditions

• Storage: PVC Resin K-65 should be stored in a dry, cool, and well-ventilated environment. Avoid exposure to moisture, as it can cause degradation and affect the processing characteristics of the resin.
• Packaging: Typically, PVC Resin K-65 is packaged in polyethylene bags or woven sacks with an inner plastic liner to prevent moisture absorption. Packaging sizes can range from 25 kg to 1000 kg.

Handling Precautions

• Personal Protective Equipment (PPE): When handling PVC Resin K-65, wear gloves, dust masks, and protective eyewear to prevent inhalation of dust and contact with the skin and eyes.
• Inhalation: Avoid inhaling dust particles. Use appropriate ventilation in processing areas.
• Skin Contact: If the resin comes into contact with skin, wash immediately with soap and water.
• Eye Contact: In case of eye contact, flush with water immediately for at least 15 minutes and seek medical attention if irritation persists.
• Ingestion: If ingested, seek immediate medical attention. Do not induce vomiting.

Environmental Impact

• PVC resin is considered non-biodegradable and should be disposed of in accordance with local environmental regulations. Recycling of PVC is possible, but requires specific processes for reclaiming the material.
• Air Emissions: When PVC is processed at high temperatures, it can release small amounts of chlorine and other chemicals. Proper ventilation and air filtration systems are recommended.

7. Regulatory Information

• REACH Compliance: Many PVC resins, including K-65, are compliant with the EU REACH (Registration, Evaluation, Authorization, and Restriction of Chemicals) regulations, but manufacturers must ensure their specific products comply with the requirements.
• Health and Safety Standards: As PVC resin is used in many applications, manufacturers of products like medical devices or food packaging must ensure compliance with health and safety regulations, such as FDA approvals in the U.S. for medical-grade products.

8. Market Availability and Pricing

PVC Resin K-65 is produced by several manufacturers worldwide. It is sold through chemical distributors and PVC resin suppliers. Pricing can vary depending on factors like:

• Quantity purchased (bulk orders typically have a lower cost per unit).
• Geographical location (shipping costs and import/export duties may affect the final price).
• Market conditions (prices may fluctuate depending on raw material costs like chlorine and ethylene).

9. Summary of PVC Resin Suspension Grade K-65

• Grade: Suspension Grade
• K-Value: 65 (medium to high molecular weight)
• Appearance: White powder or granules
• Applications: Pipes, fittings, flooring, films, sheets, medical equipment, and more
• Advantages: Versatile, good mechanical strength, high durability, easy processing
• Safety: Handle with care to avoid inhalation or skin contact, store in a dry, cool place
• Environmental: Non-biodegradable, disposal and recycling in compliance with local regulations