NC Blowing Agent (Endothermic White Foaming Agent)

‌Brand‌: WSD CHEMICAL
‌Product Name‌: NC Blowing Agent

Product Introduction

NC Blowing Agent is a high-performance endothermic white foaming agent specially developed for rigid PVC and other polymer foaming systems. Unlike traditional exothermic blowing agents, this product absorbs heat during decomposition, effectively balancing internal heat in thick-walled products and preventing local overheating degradation.

Typical Technical Specifications

1.Endothermic decomposition mechanism, effectively balances internal heat of thick foam products, avoids local overheating and yellowing

2.No color contamination, has whitening effect on foamed products, no residue precipitation

3.Works perfectly with exothermic AC blowing agent, effectively suppresses the side effects caused by excessive AC addition

4.Low decomposition temperature, mild reaction process, no violent gas release

5.Good compatibility with PVC, PS, ABS, PE, PP and modified PPO systems

Main Application Fields

‌PVC Wall Panels & Ceiling Boards‌
Matched with AC blowing agent, it effectively reduces product density, improves surface smoothness, and prevents thick plates from overheating and yellowing inside.

‌PVC Decorative Sheets & Furniture Boards‌
Improves foaming uniformity, reduces product warpage, and gives the surface a fine matte or semi-gloss texture.

‌PVC Advertising Boards & Foam Sheets‌
Ultra-fine particle grade ensures super fine cells, smooth cutting surface and no hole defects.

‌WPC Foam Profiles & Flooring‌
Balances the heat release of the system, extends production cycle, and avoids surface scorch and internal decomposition.

‌Leather & Artificial Leather Foaming Layer‌
Provides stable and mild foaming effect, improves the softness and uniformity of the foaming layer.

‌Other Thermoplastic Foaming Products‌
Suitable for foaming modification of PS, ABS, PE, PP and other engineering plastics.

Recommended Usage

Standard addition dosage: 0.3–2.0 phr, adjust according to product density and process requirements

When used with AC blowing agent, it is recommended that the ratio of NC blowing agent to AC blowing agent be adjusted according to product thickness and equipment temperature curve

Suggested to add together with resin, stabilizer and other additives in the high-speed mixing stage, fully mixed evenly

For thick-walled foam products over 10mm, appropriately increasing the proportion of NC endothermic foaming agent can significantly improve product quality and production stability

Packaging & Storage

Standard packaging: 25kg kraft paper bag with inner PE liner

Store in cool, dry and ventilated indoor warehouse, avoid direct sunlight

The shelf life under recommended storage conditions is 24 months

Complete MSDS and safety operation guidance documents are available upon request

Frequently Asked Questions (FAQ)

Q1: What is NC Blowing Agent, also known as white foaming agent?
A: NC blowing agent, a typical endothermic white foaming agent mainly based on modified sodium bicarbonate, is a non-yellowing foaming additive specially designed for PVC, PE, TPE and other thermoplastic foaming processes.

Q2: What are the core technical properties of NC blowing agent?
A: It appears as uniform white fine powder, with decomposition temperature ranging from 130°C to 190°C, stable gas output of 90–130 mL/g, and the decomposition process absorbs heat to help control the internal temperature of the melt.

Q3: What are the typical application scenarios for NC blowing agent?
A: It is widely used in thick PVC foamed boards, PE foamed sheets, TPE soft foamed parts, injection micro-foaming products and other scenarios, effectively reducing product shrinkage and improving the surface smoothness of finished products.

Q4: What are the unique advantages of NC blowing agent compared with ordinary exothermic blowing agents?
A: As an endothermic foaming agent, it can absorb the cohesive heat generated during processing, effectively avoid core overheating and yellowing of thick plates, reduce product deformation, and help obtain a smoother and flatter product surface.

Q5: What is the recommended dosage of NC blowing agent in conventional formulations?
A: For most common PVC and PE foaming systems, the recommended addition amount is 0.5–2.0 phr. The specific dosage can be adjusted according to the target foaming ratio, product thickness and actual production process.

Q6: How is the compatibility of NC blowing agent with other PVC additives?
A: It has excellent compatibility with PVC resin, calcium-zinc stabilizer, lubricant, processing aid and other common additives, and will not cause abnormal color change or dispersion problems under normal processing conditions.

Q7: What are the key precautions for storage and use of NC blowing agent?
A: It should be stored in a cool, dry and moisture-proof environment, avoid direct sunlight and long-term contact with high-humidity air. The recommended mixing temperature should not exceed 120°C during the batching stage to prevent premature gas release.

Q8: Why is NC blowing agent often used in combination with AC blowing agent?
A: The compound use of NC endothermic foaming agent and AC exothermic foaming agent can balance heat release and heat absorption in the foaming system, obtain more stable cell structure, effectively reduce the scrap rate of thick foamed products, and achieve better overall cost performance.