EVA Inclusion Bags: Enhancing Accuracy and Safety in Rubber Compounding

The rubber industry continually pursues safer and more consistent methods for adding compounding ingredients to mixers. EVA inclusion bags have rapidly become a best practice in modern rubber and tyre manufacturing—transforming how chemicals, oils, and additives are introduced during the mixing process.

What Are EVA Inclusion Bags?

EVA (Ethylene Vinyl Acetate) inclusion bags, sometimes called low-melt or batch inclusion bags, are specialty polymer bags designed to hold precise quantities of compounding chemicals or oils. Their unique property: the entire bag, filled with additives, is dropped directly into the Banbury mixer or kneader, where it melts and becomes a uniform, harmless part of the rubber matrix.

Key Features and Benefits

• Low Melting Point: With carefully engineered grades, these bags fully dissolve and disperse during the early mixing phase, leaving no residue.

• Accurate Dosage: Every inclusion bag is precisely pre-filled and weighed for the batch, ensuring consistent ingredient addition and eliminating manual measurement errors.

• Operator Safety: Chemicals are measured and contained at the source, reducing exposure to irritants and toxic substances for plant workers.

• Cleaner Work Environment: Spillage and airborne dust are significantly minimized, keeping equipment cleaner and improving compliance with safety standards.

• No Contamination: The EVA polymer is highly compatible with most rubber compounds, ensuring no adverse reaction or contamination.

• Time Savings: Pre-packed, ready-to-use bags reduce batch preparation time and improve overall factory efficiency.

• Easy-Open Design: Aristo’s EVA bags are engineered with a special easy-open additives, enabling quick handling at the weighing station and seamless integration into high-speed operations. This design feature minimizes downtime and allows for rapid batch changes, maximizing productivity.

Grade Options – Designed for Every Mixing Requirement

Aristo Flexi Pack offers two grades of EVA inclusion bags tailored for different mixing temperatures and process needs:

1. AFP73

   • DSC Melting Point: 73 +/- 2°C

   • Ideal For: Compounds and processes requiring lower mixing temperatures or early-stage ingredient addition.

2. AFP85

   • DSC Melting Point: 85 +/- 2°C

   • Ideal For: Rubber mixes needing a higher melt threshold or delayed bag dissolution in the mixing cycle.

Both grades ensure complete melting and homogeneous inclusion with zero residue, suiting a full spectrum of rubber compounding techniques.

How Are EVA Bags Used in Rubber Mixing?

1. Pre-weighing & Filling: Chemicals and additives are measured and packed into EVA bags as per the batch formulation.

2. Batch Charging: At the mixing stage, the entire closed bag is dropped directly into the mixer along with rubber, fillers, and other ingredients.

3. Complete Dissolution: Under mixing heat and shear, the EVA bag melts and blends with the rubber, delivering its contents without manual handling.

4. Uniform Dispersion: The process ensures every batch receives an accurate chemical dose, critical for high-spec rubber formulations.

Technical Specifications

• Material: 100% Ethylene Vinyl Acetate (EVA) copolymer

• Grades: AFP73 (DSC 73 +/- 2°C), AFP85 (DSC 85 +/- 2°C)

• Bag Sizes: Fully customizable to chemical, batch, and mixer needs

• Thickness Range: 40–100 microns (or as required)

• Formats: Gusseted bags, pouches, or tubular rolls

• Colours: Fully customizable - customers can request different colour bags for different batches for identification ease on their shop floor

• Compatibility: Safe with a wide range of rubber compounding chemicals and oils

• Special Feature: Easy-open seal for quick handling

Commonly Used EVA Inclusion Bag Sizes

Aristo Flexi Pack supplies EVA inclusion bags in a wide variety of dimensions, thicknesses, and colors to suit different chemicals, batch weights, and identification needs. Below are some of the most commonly ordered sizes, capacities, and usages in the rubber industry. Customized bag dimensions, colors, and formats are always available on request to match unique process requirements.

Size (Inches) W x L	Thickness (Microns)	Normal Capacity	Suitable For	Color
4 x 4	50	50 to 100 gm	Antioxidant	Natural
6 x 5	50	100 gm	Accelerator	Natural
6 x 9	50	500 gm	R chemical	Green
10 x 12	50	1-2 kg	R chemical	Green
12 x 16	50	3-4 kg	R chemical	Green
12 x 15	50	2-3 kg	Rub crumb	Red
12 x 18	50	3-5 kg	Tire ind	Pink
14 x 15	50	1-2 kg	Paraffin wax	Pink
14 x 18	50	3-5 kg	Tire in-house	Yellow
14 x 20	50	4-8 kg	Tr-belt	Blue
16 x 22	50	6-9 kg	Filler	Natural
16 x 26	80	5 kg	Zinc Oxide	Natural
18 x 26	80	6 kg	Silica	Pink/Yellow
18 x 30	80	8 kg	Silica	Pink/Yellow
22 x 34	80	9.5 kg	Silica	Pink/Yellow
18 x 24	65	10-16 kg	Tire in-house	Yellow
20 x 22	50	10-15 kg	Tire in-house	Yellow
24 x 30	50	12-18 kg	EPDM	Blue
22 x 30	50	20 kg	Reclaimed R	Natural
24 x 40	50	25 kg	Carbon black	Blue
8(3+3) x 21	50	5 kg	Tr-belt	Natural
10(3+3) x 24	50	10 kg	Tr-belt	Natural
4.5(2+2) x 12	50	1 kg	Tr-belt	Natural

These sizes are for reference only—Aristo can fully customize bag sizes, colors, thicknesses, and formats to perfectly suit your process and identification needs.

Typical Applications

• Tyre and tube manufacturing

• Conveyor and power transmission belts

• Rubberized industrial and automotive parts

• Footwear rubber compounds

• Any process requiring precise additive dosing in rubber mixing

Why Choose Aristo Flexi Pack EVA Bags?

With extensive expertise in polymer engineering, Aristo Flexi Pack provides EVA inclusion bags that offer:

• Consistent, zero-defect film extrusion

• Rapid sampling and full custom dimension options

• Expert technical support for chemistry and process compatibility

• Focus on safety, compliance, and process optimization

• Easy-to-open seal for time savings and operational efficiency

Frequently Asked Questions

Q: Can EVA bags affect product quality?
No. EVA polymer melts quickly in the mixer and is highly compatible, leaving no residue or impact on downstream rubber properties.

Q: Are the bags strong enough for heavy or abrasive powders?
Yes. Film gauge and bag formats are tailored for safe handling of dense, abrasive, or specialty chemical contents.

Q: Can I order custom size or thickness for my process?
Absolutely! We can customize to match your batch formula and operational requirements.

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Contact Aristo Flexi Pack
See how EVA inclusion bags streamline your rubber compounding, boost safety, and deliver consistent, traceable quality in every batch.

Phone: +91 9321001484
Email: sales.mum@aristoflexipack.com
Website: www.aristoflexipack.com

Optimize your process. Protect your people. Deliver perfect batches—choose Aristo Flexi Pack EVA Inclusion Bags for the competitive edge in rubber manufacturing.