Flat mop

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Solution Overview

Problem

Existing flat mops for cleanrooms face challenges in achieving reliable cleanliness and controlled moistening while ensuring high cleaning performance, often leading to incomplete disinfection or particle contamination.

Innovation Solution

A flat mop design featuring a top layer made of bonded nonwoven material and a cleaning layer with alternating microfiber and non-microfiber strip-shaped areas, which ensures uniform liquid distribution and effective dirt removal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the flat mop is insufficiently saturated with liquid, then a continuous film of liquid fails to form on the surface being cleaned, but complete disinfection or cleaning does not occur; however, if too much liquid is introduced into the mop during saturation, then there is a risk that dirt particles will not be absorbed by the fiber structure or will be trapped within it

Engineering Contradiction:
Improvecleaning performanceVSAvoidparticle contamination
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The cleaning layer is divided into multiple layers with different functions: a first cleaning layer with higher liquid retention for initial wetting and disinfection, and a second cleaning layer with lower liquid retention for dirt absorption. This segmentation allows the mop to handle both liquid distribution and particle capture effectively without trapping dirt in excessive moisture.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Different regions of the cleaning layer have different liquid retention properties. The first cleaning layer (or its outer region) is designed to retain more liquid for forming a continuous film and disinfection, while the second cleaning layer (or its outer region) retains less liquid to facilitate dirt particle absorption and prevent trapping.

Inventive Principle:
Principle #3Local quality

2Ease of manufacture

If reusable flat mops are used for cleanroom cleaning, then cost and ecological benefits are achieved, but they may release particles and fail to meet stringent cleanliness requirements

Engineering Contradiction:
Improvecost efficiencyVSAvoidparticle release
Core Design Contradiction:
Ease of manufactureVSObject-generated harmful factors

Solution Approach 1:

The flat mop is designed as a disposable product with a cleaning layer that can be easily replaced. This allows the use of simple, cost-effective materials that may release particles, while maintaining cleanroom standards by discarding the contaminated cleaning layer after use and replacing it with a fresh one. The base structure remains reusable, balancing cost efficiency with cleanliness requirements.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

3Reliability

If the cleaning layer is made entirely of microfiber material, then high cleaning performance and particle capture are achieved, but uniform liquid distribution and controlled moistening become difficult

Engineering Contradiction:
Improveparticle captureVSAvoidliquid distribution control
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The cleaning layer incorporates different materials in different regions: microfiber material in areas requiring high particle capture and cleaning performance, and non-microfiber material in areas requiring controlled liquid distribution and moistening. This local differentiation allows the mop to achieve both particle capture effectiveness and liquid distribution control.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The cleaning layer is constructed as a composite structure combining microfiber material and non-microfiber material. The microfiber component provides superior particle capture and cleaning performance, while the non-microfiber component contributes to uniform liquid distribution and controlled moistening characteristics.

Inventive Principle:
Principle #40Composite materials

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The mop achieves efficient cleaning performance, prevents particle contamination, and maintains cleanliness in cleanrooms by ensuring thorough disinfection and dirt removal, even for stubborn particles.

Implementation Method 1

the cleaning layer has or is a woven, knitted or crocheted layer, with a front and a back, containing or consisting of microfiber material

Methodology Applied
Scientific EffectCapillary action: Capillary Action

Implementation Method 2

the top layer has or is a bonded nonwoven material, in particular comprising or consisting of polyester fibers

Methodology Applied
Scientific EffectStructural support:

Implementation Method 3

the front and optionally the back of the cleaning layer have alternating, in particular substantially parallel, first and second strip-shaped areas extending from or spaced apart from the first edge towards the second edge

Methodology Applied
Scientific EffectDifferential absorption: Absorption (physical)

Data Source

PatentEP3087895B2Flat mop
Publication Date: 2026.01.14 HYDROFLEX GRP GMBH
  • EP3087895B2 patent drawingFigure 1~2

AI summary

The present invention relates to a flat mop with a cover sheet layer and an opposite cleaning layer, which has a first edge and an opposite second edge, the cleaning layer having or representing a woven, knitted or knitted layer, with a front and a back, and wherein the Cover sheet layer has or represents a solidified nonwoven material, in particular comprising or consisting of polyester fibers, wherein the front side and optionally the back side of the cleaning layer have alternating, in particular essentially parallel, first and second strip-shaped areas which are from or spaced from the first edge Extend in the direction of the second edge or to the second edge, the first areas of the cleaning layer on the front and in particular also on the back predominantly, in particular essentially exclusively, containing or consisting of woven, knitted or knitted microfiber material and the second areas of the cleaning layer predominantly on the front, in particular essentially exclusively containing or consisting of woven, knitted or knitted fiber material that is not microfiber material (non-microfiber material). The invention further relates to a cleaning device comprising an actuating element, in particular a handle, and, connected or connectable to the actuating element, a flat mop holder and a flat mop according to the invention. Finally, the invention relates to the use of the flat mop according to the invention and the cleaning device according to the invention for cleaning clean rooms or sterile clean rooms.