Multifilament Cotton Bag Filter

Name: Multifilament Cotton Bag Filter
Brand: Prosestim

Silicone-Free Natural Cotton Weave for Oil-Containing Process Liquids

The multifilament cotton bag filter is an economical surface filter for general-purpose liquid filtration that combines the oil-absorbing property of natural cotton fibre with the strength of a multi-yarn weave.

Material

100% Multifilament Natural Cotton

Micron Range

75 – 1500 µm

Max. Operating Temperature

90°C

Multifilament Cotton Bag Filter

What Is a Multifilament Cotton Bag Filter?

Multifilament cotton bag filters are a natural-fibre liquid filtration medium made by processing yarn, formed by twisting many fine cotton fibres, on precision looms. Unlike synthetic multifilament alternatives (polyester, polypropylene, nylon), cotton is made from a natural, additive-free raw material. The high tensile strength and flexibility of the multifilament structure, combined with the advantages of natural cotton fibre, provide reliable surface filtration across a wide range of applications.

The most notable feature of multifilament cotton bag filters compared with synthetic alternatives is the lipophilic (oil-loving) structure of natural cotton fibre; this provides additional oil absorption during mechanical filtration of oil-containing process liquids. Their silicone-free, additive-free natural raw material allows them to be used safely on food, beverage and sensitive process lines. However, the risk of biodegradation during wet standing and storage must be considered.

Product Identity and Technical Summary

Multifilament cotton bag filters are made from silicone-free natural cotton raw material by multi-yarn weaving. They are available in 75–1500 µm ratings and withstand up to 90 °C. Their naturally lipophilic structure gives an extra absorption advantage in oil-containing process liquids, while the surface filtration principle allows effective retention of solid particles.

Note: The values given are for standard production. Please consult our technical team for special application conditions.

Key Technical and Structural Features

Material: 100% Multifilament Natural Cotton Filter Fabric
Micron Rating: 75 · 100 · 150 · 200 µm
250 · 300 · 400 · 600 µm
800 · 1000 · 1200 · 1500 µm
Filtration Type: Surface filtration — nominal filtration
Max. Operating Temperature: 90°C
Chemical Resistance: Moderate resistance to common acids and alkalis; limited resistance to strong solvents.
Lipophilic Property: Thanks to the structural properties of natural cotton fibre, it helps partially absorb non-emulsified free oil.
Silicone Content: Silicone-free natural structure
Seam Construction: Double-row industrial stitching

Collar Types and Adapters

A safe, leak-tight connection of the bag filter to the system starts with choosing the right collar. Six collar types, from PP rings to steel snap rings and from flanged designs to drawstrings, can be selected according to the design of your existing housing, the operating pressure and the requirements of the chemical environment. If you are not sure which collar type fits your filter housing, send us a sample or photo and we will make an exact replica.

Critical Note: If you are not sure which collar type your filter has, you can send us a photo or ship a sample bag to our facility and ask us to produce an exact replica.

Advantages of the Multifilament Cotton Bag Filter

By combining the advantages of natural fibre with the mechanical strength of a multi-yarn structure, multifilament cotton bag filters offer distinctive properties that synthetic alternatives cannot match in oil-containing process liquids and on food and sensitive process lines.

Naturally Lipophilic Structure: Thanks to the structural properties of natural cotton fibre, non-emulsified free oil particles are partially absorbed during mechanical filtration; an extra advantage in oil-containing processes.
High Strength and Flexibility: The multi-yarn multifilament structure gives higher tensile strength and flexibility than single-yarn alternatives; long-lasting use under demanding operating conditions.
Silicone-Free Natural Structure: Natural raw material free of silicone and contaminating additives; can be used safely on food, beverage and sensitive process lines.
Dirt-Holding Capacity: The spaces between the filaments of the multifilament structure provide higher dirt-holding capacity than monofilament.
Wide Micron Range: Wide micron options from 75 to 1,500 µm, adaptable to different coarse filtration needs.
Cost-Effective: An economical cost structure compared with synthetic alternatives; offers the advantage of natural fibre at low cost.

Industry Applications

Bag filters suited to different process needs are used across a wide range of industrial applications to protect product quality, safeguard equipment and support production continuity.

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17 Metal and Surface Treatment Flawless surfaces and bath stability in metal and surface treatment. Explore solutions

18 Forest Products Resin and glue filtration in forest products and furniture. Explore solutions

19 Automotive Precision process filtration for zero defects in automotive manufacturing. Explore solutions

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Housings the bag fits, the support basket and other media options that can be used in the same housing.

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Multifilament Cotton Bag Filter

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Request everything in one quote: let’s size the product, housing and connection parts together.

Your Questions Answered

Frequently Asked Questions

At Prosestim, we are committed to answering your questions and providing technical support for our filtration solutions.

What is a multifilament cotton bag filter?

It is a natural-fibre liquid filtration medium made by weaving yarn formed by twisting many fine cotton fibres. Its lipophilic structure gives an extra absorption advantage in oil-containing processes.

How does it differ from polyester multifilament?

Cotton is a natural, additive-free raw material; thanks to its lipophilic structure, free oil particles are partially absorbed. Polyester, with its chemical resistance and temperature resistance of 135 °C, offers a wider range of industrial applications. Cotton is preferred for food and oil-containing applications, polyester for chemically demanding processes.

What is the maximum temperature it can withstand?

It withstands an operating temperature of 90 °C. For higher temperatures, polyester or nylon multifilament should be chosen.

How does it retain oil?

The lipophilic structure of natural cotton fibre absorbs non-emulsified free oil particles. This mechanism does not work in processes containing emulsified oil.

Can it be used in humid environments?

Yes. A cotton bag filter works normally in liquid filtration. However, leaving it wet in the housing during line stoppages or storing it in a humid environment creates a risk of biodegradation from bacteria and rot. To guard against this risk, remove the bag from the housing during long stoppages and store it in a dry place.

Can it be used in food applications?

Yes. The silicone-free, additive-free natural cotton construction can be used safely in food and beverage applications.

Do you manufacture custom sizes?

Yes, custom production is available in non-standard size and micron combinations.

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