# US 2019/0313875 A1 · Wet sheet for cleaning and method for producing wet sheet for cleaning

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- Number: US 2019/0313875 A1
- Document ID: US20190313875A1
- Status: Published application
- Kind: A1
- Application number: 16/344,724
- Filed: 2017-10-31
- Published: 2019-10-17
- Earliest claimed: 2016-10-31
- Assignees: Daio Paper Corporation
- Applicants: Daio Paper Corporation
- Inventors: Naoki SHINTANI
- Web page: https://patentgrep.com/patent/US20190313875A1

## CPC

- A47L 13/17: containing cleaning agents (A47L13/19 takes precedence {; chemical compositions C11D17/049})
- B32B 5/022: {Non-woven fabric}
- B32B 5/06: characterised by a fibrous {or filamentary} layer {mechanically connected, e.g. by needling} to another layer, e.g. of fibres, of paper
- B32B 5/08: the fibres or filaments of a layer being of different substances {, e.g. conjugate fibres, mixture of different fibres}
- B32B 5/26: another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)}
- D04H 1/4291: Olefin series
- D04H 1/435: Polyesters
- D04H 1/4374: using different kinds of webs, e.g. by layering webs
- D04H 1/5412: {sheath-core}
- D04H 1/5418: {Mixed fibres, e.g. at least two chemically different fibres or fibre blends}
- D04H 1/544: Olefin series
- D04H 1/559: the fibres being within layered webs
- D04H 1/724: forming webs during fibre formation, e.g. flash-spinning
- D06M 13/165: Ethers (D06M13/11 takes precedence)
- D06M 13/332: Di- or polyamines
- D06M 13/463: derived from monoamines
- B32B 2250/20: All layers being fibrous or filamentary
- B32B 2260/023: Two or more layers
- B32B 2260/04: Impregnation, embedding, or binder material
- B32B 2262/0253: Polyolefin fibres
- B32B 2262/0284: Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
- B32B 2262/12: Conjugate fibres, e.g. core/sheath or side-by-side
- B32B 2307/72: Density
- B32B 2307/728: Hydrophilic
- B32B 2307/73: Hydrophobic
- B32B 2432/00: Cleaning articles, e.g. mops or wipes
- D06M 2101/06: cellulosic
- D06M 2101/20: Polyalkenes, polymers or copolymers of compounds with alkenyl groups bonded to aromatic groups
- D06M 2101/32: Polyesters
- D10B 2321/022: polypropylene
- D10B 2331/04: polyesters, e.g. polyethylene terephthalate [PET]
- D10B 2401/021: hydrophobic
- D10B 2401/022: hydrophylic
- A47L: DOMESTIC WASHING OR CLEANING (brushes A46B; cleaning quantities of bottles or of other hollow articles of one kind B08B9/00; laundry D06F); SUCTION CLEANERS IN GENERAL (cleaning in general B08)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- D04H: MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL (weaving D03; knitting D04B; braiding D04C; net-making D04G; sewing D05B; tufting D05C; finishing non-woven fabrics D06); FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING {; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION}(non-woven fabrics having an intermediate or external layer of a different kind, e.g. of woven fabric, B32B)
- D06M: TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES

## Abstract

A wet sheet for cleaning includes multiple layers and is impregnated with a chemical solution. The wet sheet for cleaning includes outer layers which are made of hydrophobic fiber and which are each arranged on a front surface and a back surface, and an inner layer which is made of hydrophilic fiber and which is arranged between the outer layers. The inner layer is provided with a hydrophilic fiber inner layer with the hydrophilic fiber and a hydrophobic fiber inner layer with hydrophobic fiber. The hydrophobic fiber inner layer is adjacent to at least one of the outer layers. The inner layer includes pulp by 50 wt % or more, has a grammage of 20 to 75 g/m2, and occupies 20 to 70% of a total mass of the wet sheet for cleaning.

## Claims

### Claim 1

A wet sheet for cleaning comprising multiple layers and being impregnated with a chemical solution, the wet sheet for cleaning comprising:
outer layers which are made of hydrophobic fiber and which are each arranged on a front surface and a back surface; and
an inner layer which is made of hydrophilic fiber and which is arranged between the outer layers,
wherein the inner layer is provided with a hydrophilic fiber inner layer with the hydrophilic fiber and a hydrophobic fiber inner layer with hydrophobic fiber,
wherein the hydrophobic fiber inner layer is adjacent to at least one of the outer layers, and
wherein the inner layer includes pulp by 50 wt % or more, has a grammage of 20 to 75 g/m2, and occupies 20 to 70% of a total mass of the wet sheet for cleaning.

### Claim 2 (depends on 1)

The wet sheet for cleaning according to claim 1, wherein the hydrophobic fiber of the outer layers includes polyethylene terephthalate fiber at a rate of 80% or more and a fiber diameter of the polyethylene terephthalate fiber is 3.3 dtex or more.

### Claim 3 (depends on 1)

The wet sheet for cleaning according to claim 1, further comprising an interlaced part where the outer layers and the inner layer are interlaced.

### Claim 4 (depends on 3)

A method for producing the wet sheet for cleaning according to claim 3, wherein the interlaced part is formed by water-jet interlacing.

### Claim 5 (depends on 2)

The wet sheet for cleaning according to claim 2, further comprising an interlaced part where the outer layers and the inner layer are interlaced.

### Claim 6 (depends on 5)

A method for producing the wet sheet for cleaning according to claim 5, wherein the interlaced part is formed by water-jet interlacing.