[Measures for Black Specks and Contamination in Molding Machines] Glass Wool-Containing Purging Compound "ecomaru" | Available in Stock in Thailand | Free 3kg Sample Delivery!

Technology & Services

KAKUUNDO (THAILAND) CO., LTD. supplies the glass wool-blended purging compound "ecomaru" in Thailand.

ecomaru is a product designed to remove carbonized residues and remaining colorants inside molding machines, helping address issues such as black specks, contamination, color changes, and flame retardant resin purging. Free 3-kg samples are available for evaluation and testing.

Table of Contents

• Features of ecomaru
• Main Applications
• Case Study: Eliminating 2nd Purging and Reducing Usage
• Grades GWP, GWS, and GSS & Usage Conditions
• Stock & Sample Availability in Thailand
• Frequently Asked Questions (FAQ)

Features of ecomaru

ecomaru is a purging compound for resins blended with ultra-fine, flexible short glass wool fibers.

By using shorter and finer fibers than general glass fiber-blended products, it physically removes contamination adhering to screws and cylinders. It is designed to enhance cleaning performance while minimizing scratches inside molding machines.

Main Applications

Measures for Black Specks and Contamination

Resins and carbonized residues adhering to the inside of molding machines can peel off during reheating after holidays or shutdowns, causing black specks and foreign matter contamination.

When adjusting molding conditions does not resolve defect rates, removing leftover contamination inside the machine is necessary. ecomaru can be used to clean molding machines experiencing recurring black specks and contamination.

For medium and large molding machines that have not undergone disassembly cleaning for extended periods, it serves as an effective cleaning method prior to considering disassembly.

Color Change

ecomaru can be used for color changes under conditions where previous material colors are difficult to remove, such as PP black masterbatch.

Purging color components inside the machine prevents color residue from leaking into subsequent materials, reducing startup purge shots and inspection workload.

Purging Flame Retardant Resins

Depending on molding conditions, flame retardant resins can cause additives to carbonize and remain inside the machine.

Since carbonized material leads to black specks and contamination, cleaning the machine interior is essential when changing materials or restarting after long shutdowns. ecomaru is also widely used for purging these flame retardant resins.

Case Study: Eliminating 2nd Purging and Reducing Usage

Below is a summary of a process that previously combined a GF-containing purging compound with a secondary purging compound (2nd Purge) before switching to ecomaru GWS:

Note: These results were achieved under specific resin, molding machine, and purging conditions. Because performance may vary depending on the operating environment, conducting a sample test to compare with your current purging method is recommended prior to adoption.

Grades GWP, GWS, and GSS & Usage Conditions

Stock & Sample Availability in Thailand

KAKUUNDO (THAILAND) CO., LTD. maintains constant inventory of GWP, GWS, and GSS grades in Thailand to ensure fast response times for implementation reviews and on-site testing.

To allow evaluation of suitability and cleaning performance prior to full adoption, free 3-kg samples are available. During sample testing, the following items should be evaluated against your current purging method:

• Reduction of black specks and contamination
• Color residue and material replacement efficiency
• Purging compound usage volume
• Discarded shots and waste volume
• Working time
• Necessity of secondary purging (2nd Purge)

When evaluating purging compounds, it is essential to compare the total cost—including usage amount, waste volume, defect rate, and startup time—rather than focusing solely on unit price.

※For more details, please download the PDF attached to this article or contact us via the form at the bottom of the page.

Frequently Asked Questions (FAQ)

Q. What types of resin can ecomaru be used with?
A. GWP is suitable for PP and PE, while GWS is designed for styrene-based resins such as ABS, AS, and HIPS, as well as PA6/66, POM, and PBT. The grade is selected based on the resin used and operating temperature.

Q. Will ecomaru damage molding machines?
A. ecomaru utilizes ultra-fine and flexible short glass wool fibers. Compared to conventional glass fiber-blended products, it is engineered to remove contamination while minimizing scratches inside the machine.

Q. Is secondary purging (2nd Purge) always unnecessary?
A. The necessity of secondary purging depends on the resin used, molding temperature, previous/subsequent materials, and current purging methods. While elimination has been confirmed in case studies, please verify suitability through a sample test prior to adoption.

Q. What should be verified during the 3-kg sample test?
A. You should evaluate improvements in black specks and color bleeding, purging compound usage volume, discarded shots, working time, and the necessity of secondary purging. Recording usage amounts and defect rates before and after testing is recommended for easy comparison.

※For more details, please download the PDF attached to this article or contact us via the form at the bottom of the page.