High-Purity 135A CPE for Non-Toxic, Heat-Sealable Food-Grade Packaging

Product Description

Product Overview

CPE is chlorinated polyethylene polymers produced by combining chlo rine and polyethylene in an aqueous slurry.Its saturated, linear high molecular structure enables CPE with many superior physical and chemical performances. As a high-performance additive, it enhances PVC applications by improving impact resistance, weather durability, and plasticizer retention in flexible films. Its adaptable properties make it ideal for cable insulation, rubber elastomers, and flame-retardant polyolefin compounds, while also serving as a reliable material for protective wire jacketing. CPE's multifunctional capabilities support diverse industrial solutions, offering manufacturers a practical balance of performance and process efficiency. 

 

Product Parameters

 

ITEM	HT135A	HT6000	HT3135	HT3610	HT2135	HT7030
Heat of Fusion(J/gs)	2	2	2	2	2.5	1
Chlo rine Content(%)	36±1	35±1	35±1	35±1	35±1	30±1
Shore A hardness	60	65	65	60	75	70
Tensile Strength(MPa)	8	8	8	8.5	6	9
Elongation at Break(%)	700	600	600	600	600	600
Mooney Viscosity(ML 121ºC 1+4)	-	-	-	-	-	70~80
Volatile Matter(%)	0.3	0.3	0.3	0.3	0.4	0.3
Ash Content	4.5	4.5	4.5	4.5	-	4.5
Main Applications	Used as PVC impact modifier ,ABS products flame retardant and impact modification,Modifying PE and other Plastics,soft products.
Main properties	High impact modification performance,high filling efficiency,excellent flame retardant property and good processing performance

Uses

I. Characteristics of CPE as an Impact Modifier

1. Core Functions

   • Enhances material toughness (impact resistance), especially for polar polymers like rigid PVC and ABS.

   • Improves processing fluidity and reduces melt viscosity.

   • Provides auxiliary benefits such as plasticization, flame retardancy, and weather resistance (higher chlo rine content in certain grades enhances flame retardancy).

2. Applications

   • PVC pipes/profiles (e.g., doors, windows, railings)

   • Wire and cable sheathing

   • Injection-molded/extruded products (e.g., automotive parts, industrial components)

   • Blending with ABS, PE, and other polymers

II. CPE Selection Guidelines

1. Chlo rine Content

   • 36-40% chlo rine: Optimal for impact modification (e.g., CPE 135A/B), suitable for rigid PVC.

   • >40% chlo rine: Higher flame retardancy but reduced toughness; balance based on formulation requirements.

2. Crystallinity and Molecular Weight

   • Low-crystallinity CPE (e.g., 135A) ensures better dispersion and impact performance.

   • Moderate molecular weight (Mooney viscosity ML(1+4) 125°C: 50-80) balances processability and toughening effects.

III. Typical Formulation Design

1. Rigid PVC Products (Pipes/Profiles)

Component	Ratio (phr)	Function
PVC resin	100	Base material
CPE	5-12	Impact modifier (8-10 phr recommended)
Thermal stabilizer	3-5	Calcium-zinc/lead-based
Lubricant	1-2	Internal/external lubricant blendFiller
Filler	5-20	Calcium carbonate (cost control)
Processing aid	1-2	ACR-type (improves melt strength)

 

Note: Combining CPE with ACR enhances impact resistance and surface finish.

2. ABS/CPE Blends

• CPE dosage: 10-20%, significantly improves low-temperature impact resistance of ABS.

• Add compatibilizers (e.g., SBS) to enhance interfacial bonding.

IV. Key Processing Parameters

1. Mixing Process

   • High-speed mixer: Add PVC and stabilizer first, then CPE at 80°C, followed by lubricants and fillers to avoid premature agglomeration.

   • Mixing temperature: 110-120°C (avoid localized overheating to prevent CPE degradation).

2. Extrusion/Injection Molding

   • Extrusion temperature: 160-185°C (adjust based on equipment); excessive temperatures may degrade CPE.

   • Screw speed: Medium-low (prevent shear-induced overheating).

   • Mold cooling: Uniform cooling minimizes internal stress and improves toughness.

V. Common Issues and Solutions

Issue	Possible Cause	Solution
Insufficient impact resistance	Low CPE dosage/poor dispersion	Increase CPE to 10-12 phr; optimize mixing
Rough surface	Inadequate lubrication or poor CPE compatibility	Adjust lubricants; add ACR
Decomposition bubbles	Excessive processing temperature	Reduce temperature to <180°C; check stabilizer
Reduced mechanical strength	Excess CPE or high chlo rine content	Reduce CPE; use 36% Cl grades

 

VI. Precautions

1. Storage

   • Store CPE in a cool, dry, and sealed environment (avoid moisture absorption).

   • Shelf life: 1 year; test chlo rine content if expired.

2. Safety

   • Avoid processing temperatures >200°C to prevent HCl gas release.

   • Ensure pH compatibility when using calcium carbonate fillers (avoid acidic fillers).

3. Eco-friendly Alternatives

   • For halogen-free flame retardancy, combine with MBS or acrylate-based impact modifiers.

VII. Performance Testing Recommendations

1. Key Tests

   • Notched impact strength 

   • Melt flow rate 

   • Thermal stability 

2. Long-term Performance Validation

   • UV aging test (weather resistance)

   • Low-temperature brittleness test (-10°C to -20°C)

Product Description

 

CPE is an engineered polymer derived through chlorination substitution reactions using high-density polyethylene (HDPE) as the base material. Based on molecular structure and functional applications, this versatile material is commercially categorized into two primary types:

Resin-Type CPE
Designed for thermoplastic compounding

Compatible with various resins including:
• PVC (enhanced impact/weather resistance)
• Polyolefins (PE, PP)
• Engineering plastics (PS, ABS)
• Polyurethane (PU) systems

Elastomer-Type CPE (CM)
Functions as high-performance specialty rubber

Blending capabilities with:
• EPDM (ethylene-propylene-diene monomer)
• Butyl rubber (IIR)
• Nitrile rubber (NBR)
• Chlorosulfonated polyethylene (CSM)

 

Key Technical Advantages:

Dual functionality as both standalone material and performance modifier

Customizable chlo rine content (typically 34-44%) for targeted properties

Broad processing compatibility across extrusion, injection molding, and calendaring

This material's unique adaptability enables cross-industry applications ranging from weather-resistant construction profiles to chemical-resistant rubber components.

 

Detailed Photos

 

Company Profile

Weifang Phoenix New Material Co., Ltd

 

                             Weifang Phoenix New Material Co., Ltd is a high-tech chemical enterprise integrating research and development,

                        production, sales and technical services. Headquartered in Weifang, Shandong Province. Its production facilities are

                                          ocated in Weifang Binhai Chemical Industry Park, a state-approved chemical industry park.
 

                           Our mission is to be the leading sustainable "one-stop shop" chemical solutions company, providing customers

                      with innovative, science-led, differentiated products and solutions. To this end, we provide a safe and healthy working

                                 environment for our employees and comply with all local, national and international regulations.

 

FAQ

1.Q:How's the quality?
A:We are the source factory, quality is guaranteed.

2.Q:When does it ship?
A:We have standardized processes to ship as fast as possible.

3.Q:How do you protect the after-sales?
A:We keep samples of each batch and support returns and technical traceability in case of quality problems.